Lid, container with lid, and combination of lid and container

Abstract

Provided are a lid, a container with the lid, and a combination of the lid and the container, which can prevent contents from leaking from the container with the lid while using a paper-based raw material, and can improve the recyclability. The lid is configured so as to be attachable to a container having an opening and an edge forming the opening, and has a top surface portion that covers the opening when attached to the container. The top surface portion has a paper-based substrate comprising a paper-based material, a penetration portion penetrating the paper-based substrate, a gas-liquid separation material capable of separating a gas in a gas phase and at least a portion of a liquid in the liquid phase from a mixed fluid having the gas phase and the liquid phase, and a thermoplastic coating agent. The gas-liquid separation material has a paper-based air-permeable sheet that includes long fibers and has air permeability, a liquid-repellent agent that imparts liquid repellency to the paper-based air-permeable sheet is disposed on at least one surface of the paper-based air-permeable sheet, and the gas-liquid separation material is disposed so as to cover at least a portion of the penetration portion in a plan view of the paper-based base material, and the gas-liquid separation material is disposed so as to cover at least a portion of the penetration portion in a plan view of the paper-based base material. And the coating agent is used for bonding the gas-liquid separation material and the paper base material.

Description

Technical Field

[0001] The present invention relates to a lid, a container with a lid, and a combination of the lid and the container. Background Art

[0002] The act of accommodating beverages, foods, etc. (hereinafter also referred to as "contents") in a container having an opening formed at the upper end and installing a lid to enclose them in the container and providing them in this state is being widely carried out.

[0003] As a lid installed on a container, from the viewpoint of reducing the environmental burden and reducing the use of petroleum raw materials, a lid using paper raw materials is required. As a method of installing the lid on the container, a method of joining the lid to the edge portion of the outer periphery of the upper end opening of the container using a method such as hot pressing (sealing method) and a method of fitting the lid into the container (fitting method) are known. In order to ingest the contents from a container with a lid (a container with a lid), as shown in Patent Document 1, the following operations are performed: peeling (removing) the lid from the edge of the container, or removing the lid from the container in the case where the lid is installed on the container by the fitting method. However, in addition, a through portion can be provided in the lid and a member for ingesting the contents (for example, a straw, etc.) can be inserted into the through portion (forming an insertion port).

[0004] Prior Art Documents

[0005] Patent Documents

[0006] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2014 - 84128 Summary of the Invention

[0007] In the case where the lid has a through portion, there is room for improvement in suppressing the overflow of the contents from the through portion onto the lid in a state where the opening of the container is covered by the lid. In particular, in the case where the contents are items that release vapor and gas such as hot beverages or cold carbonated beverages, etc., the lid is required to improve the following points: the liquid component of the contents is accompanied by an increase in the pressure inside the container with a lid, and leaks to the outside together with the vapor and gas in which the liquid is entrained.

[0008] Moreover, with respect to the lid, from the viewpoint of reducing the environmental burden, not only is it important to reduce the use of petroleum raw materials, but also an improvement in recyclability becomes important. Therefore, for the lid, while it is required to use paper raw materials, it is also required to prevent the liquid as the contents from leaking from the container with a lid and to improve recyclability.

[0009] An object of the present invention is to provide a lid, a container with a lid, and a combination of the lid and the container, which use paper raw materials, can prevent the contents from leaking out of the container with a lid, and have recyclability.

[0010] The gist of the present invention is as follows (1) to (10).

[0011] (1) A lid configured to be attachable to a container having an opening and a rim forming the opening, having a top surface that covers the opening when attached to the container, the top surface having a paper base material made of a paper material, a through hole penetrating the paper base material, a gas-liquid separation material capable of separating the gas phase and at least a part of the liquid phase of the liquid from a mixed fluid having a gas phase and a liquid phase, and a thermoplastic coating agent. The gas-liquid separation material has a paper ventilation sheet including long fibers and having air permeability, and a liquid repellent that imparts liquid repellency to the paper ventilation sheet is disposed on at least one surface of the paper ventilation sheet. The gas-liquid separation material is configured to cover at least a part of the through hole when the paper base material is viewed from above, and the coating agent bonds the gas-liquid separation material and the paper base material.

[0012] (2) In the lid according to (1) above, the liquid repellent is a water repellent.

[0013] (3) In the lid according to (1) above, the paper ventilation sheet is a non-woven fabric.

[0014] (4) In the lid according to (1) above, the long fibers are paper fibers.

[0015] (5) In the lid according to (1) above, the liquid repellent bonds to at least a part of the long fibers.

[0016] (6) In the lid according to (1) above, the liquid repellent is also disposed inside the paper ventilation sheet.

[0017] (7) In the lid according to (1) above, the gas-liquid separation material is formed with a cut-in portion and / or a semi-cut portion at a position corresponding to the through hole.

[0018] (8) In the lid according to (1) above, the gas-liquid separation material includes the long fibers as a main component.

[0019] (9) A container with a lid, having: the lid according to (1) above; and the container, the container having the opening formed at the upper end and a rim forming the outer periphery of the opening, and the lid is joined to the container.

[0020] (10) A combination of a lid and a container, comprising: the lid described in the above (1); and the container, the container having the opening formed at the upper end and the edge portion forming the outer periphery of the opening.

[0021] Advantages of the Invention

[0022] According to the present invention, it is possible to provide a lid, a container with a lid, and a combination of a lid and a container, which use paper raw materials, can prevent the contents from leaking out of the container with a lid, and have recyclability. Description of the Drawings

[0023] Figure 1 In which, Figure 1 A in is a plan view for explaining an embodiment of the lid of the first embodiment. Figure 1 B in is a side view for explaining an embodiment of the lid of the first embodiment. Figure 1 C in schematically shows Figure 1 A cross-sectional view showing the state of the longitudinal section along the line A - A in A. Figure 1 D in schematically shows Figure 1 A cross-sectional view showing the state of the longitudinal section along the line B - B in B.

[0024] Figure 2 In which, Figure 2 A and B are diagrams showing an embodiment of the gas-liquid separation material.

[0025] Figure 3 In which, Figure 3 A is a diagram showing an embodiment of the gas-liquid separation material. Figure 3 B, C, and D are diagrams for explaining the state of the liquid repellent adhering to the fibers.

[0026] Figure 4 In which, Figure 4 A to B are plan views for explaining other examples of the lid of the first embodiment.

[0027] Figure 5 In which, Figure 5 A is a plan view for explaining other examples of the lid of the first embodiment. Figure 5 B is a bottom view for explaining other examples of the lid of the first embodiment. Figure 5 C schematically shows Figure 5 A cross-sectional view showing the state of the longitudinal section along the line C - C in A.

[0028] Figure 6 In which, Figure 6 A is a plan view for explaining an embodiment of the lid of Modification 5 of the first embodiment. Figure 6 B schematically shows Figure 6A sectional view showing the state of the longitudinal section of the D-D line in A.

[0029] Figure 7 In Figure 7 A is a top view showing an example of a blank for forming the lid of the first embodiment. Figure 7 B schematically shows Figure 7 A sectional view showing the state of the longitudinal section of the E-E line in A. Figure 7 C is a view showing an example of a process for shaping the blank. Figure 7 D is for explaining the state when observing the blank of C in the direction of the line of sight in the DR direction of the arrow. Figure 7 In the case of the blank of C.

[0030] Figure 8 In Figure 8 A is a top view showing an example of the lid of the modified example 6 of the first embodiment. Figure 8 B schematically shows Figure 8 A sectional view showing the state of the longitudinal section of the F-F line in A.

[0031] Figure 9 In Figure 9 A is a top view showing an example of the lid of the modified example 7 of the first embodiment. Figure 9 B schematically shows Figure 9 A sectional view showing the state of the longitudinal section of the G-G line in A. Figure 9 C schematically shows the enlarged state of the region EI surrounded by the chain line in B of Figure 9 B.

[0032] Figure 10 In Figure 10 A is a perspective view showing an example of the lid of the second embodiment. Figure 10 B schematically shows Figure 10 A sectional view showing the state of the longitudinal section of the H-H line in A.

[0033] Figure 11 In Figure 11 A is a perspective view showing an example of the lid of the third embodiment. Figure 11 B schematically shows Figure 11 A sectional view showing the state of the longitudinal section of the J-J line in A.

[0034] Figure 12 In Figure 12 A is a perspective view showing an example of the lid of the fourth embodiment. Figure 12 B schematically shows Figure 12 A sectional view showing the state of the longitudinal section of the K-K line in A.

[0035] Figure 13 In Figure 13 A of is a top view of an embodiment of the lid for explaining the fifth embodiment. Figure 13 B of is a rear view of an embodiment of the lid for explaining the fifth embodiment. Figure 13 C of schematically represents Figure 13 A cross-sectional view showing the state of the longitudinal section along line L-L in A of.

[0036] Figure 14 In Figure 14 A and B of are top views of an embodiment of the blank for forming the lid of the second embodiment.

[0037] Figure 15 In Figure 15 A of is a perspective view of an embodiment of the container with a lid. Figure 15 B of schematically represents Figure 15 A cross-sectional view showing the state of the longitudinal section along line M-M in A of.

[0038] Figure 16 In Figure 16 A of is a perspective view of an embodiment of the container with a lid. Figure 16 B of schematically represents Figure 16 A cross-sectional view showing the state of the longitudinal section along line N-N in A of.

[0039] Figure 17 In Figure 17 A of is a top view of an embodiment of the lid for explaining the first modification of the first embodiment. Figure 17 B of is a side view of an embodiment of the lid for explaining the first modification of the first embodiment. Figure 17 C of schematically represents Figure 17 A cross-sectional view showing the state of the longitudinal section along line I-I in A of.

[0040] Figure 18 In Figure 18 A of is a top view of an embodiment of the lid for explaining the first embodiment. Figure 18 B of is a side view of an embodiment of the lid for explaining the first embodiment. Figure 18 C of schematically represents Figure 18 A cross-sectional view showing the state of the longitudinal section along line O-O in A of.

[0041] Figure 19 In Figure 19 A of is a top view of an embodiment of the lid for explaining the first embodiment. Figure 19 B of is a side view of an embodiment of the lid for explaining the first embodiment.Figure 19 C schematically shows Figure 19 a cross-sectional view of the state of the P-P line longitudinal section in A.

[0042] Figure 20 In Figure 20 A of [reference numeral] is a top view of an embodiment of a lid representing Form A1. Figure 20 B of [reference numeral] is a cross-sectional view of the state of the Q-Q line longitudinal section.

[0043] Figure 21 In Figure 21 A of [reference numeral] schematically shows the state of magnifying the region XR1 enclosed by the dashed line of A of Figure 20 a magnified cross-sectional view. Figure 21 B of [reference numeral] schematically shows the state of magnifying the region XR2 enclosed by the dashed line of B of Figure 20 a magnified cross-sectional view.

[0044] Figure 22 In Figure 22 A of [reference numeral] is a perspective view of an embodiment of a container with a lid. Figure 22 B of [reference numeral] schematically shows Figure 22 a cross-sectional view of the state of the R-R line longitudinal section in A of

[0045] Figure 23 In Figure 23 A of [reference numeral] is a top view of an embodiment of a lid representing the first form example of Form A2. Figure 23 B of [reference numeral] is a cross-sectional view of the state of the S-S line longitudinal section.

[0046] Figure 24 In Figure 24 A of [reference numeral] schematically shows the state of magnifying the region XS1 enclosed by the dashed line of B of Figure 23 a magnified cross-sectional view. Figure 24 B of [reference numeral] schematically shows the state of magnifying the region XS2 enclosed by the dashed line of A of Figure 24 a magnified cross-sectional view. Figure 24 C of [reference numeral] is a magnified top view schematically showing an example of fiber crossing.

[0047] Figure 25 In Figure 25 A of [reference numeral] is a perspective view of an embodiment of a container with a lid. Figure 25 B of [reference numeral] schematically shows Figure 25 a cross-sectional view of the state of the T-T line longitudinal section in A of

[0048] Figure 26 In Figure 26 A of [reference numeral] schematically shows the state of magnifying the region XS3 enclosed by the dashed line of B of Figure 26 a magnified cross-sectional view. Figure 26B schematically shows an enlarged cross-sectional view of the enlarged state of the region XS4 surrounded by the dashed line of A of Figure 26 C is an enlarged cross-sectional view schematically showing the enlarged state of the region XA surrounded by the dashed line of B of Figure 26 In Figure 26 A of

[0049] Figure 27 is an enlarged cross-sectional view showing an embodiment of the lid body of the first form example. Figure 27 B of Figure 27 is an enlarged cross-sectional view showing an embodiment of the container with a lid body using the lid body of the first form example. Figure 27 C of

[0050] Figure 28 is an enlarged cross-sectional view showing an embodiment of the lid body of the container with a lid body using the lid body of the second form example. Figure 28 A and B of

[0051] Figure 29 are enlarged cross-sectional views showing an embodiment of the lid body of the first form example. Figure 29 A, B, and C of

[0052] Figure 30 are enlarged cross-sectional views showing an embodiment of the position of the receiving structure in the lid body of the first form example. Figure 30 A of Figure 30 is an enlarged cross-sectional view showing an embodiment of the lid body of the third form example.

[0053] Figure 31 In Figure 31 A of Figure 31 is an enlarged cross-sectional view showing an embodiment of the lid body of the fourth form example.

[0054] Figure 32 B of Figure 32 is an enlarged cross-sectional view showing an embodiment of the container with a lid body using the lid body of the fourth form example. Figure 32 A of

[0055] Figure 33 In Figure 33 is a top view showing an embodiment of the lid body of the first form example. Figure 33 B of

[0056] Figure 34This is a diagram for explaining the results of Example 1. Detailed implementation mode

[0057] Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. In addition, the description will be carried out in the following order: 1. The first embodiment, 2. The second embodiment, 3. The third embodiment, 4. The fourth embodiment, 5. The fifth embodiment, 6. Application examples, 7. Examples of filter components, 8. Form A1 of the lid, 9. Form A2 of the lid. In this specification and the accompanying drawings, components having substantially the same functional configuration are labeled with the same reference numerals, and thus repeated descriptions are omitted.

[0058] The following description is a preferred specific example of the present invention, and the content of the present invention is not limited to the described embodiments. In addition, in the following description, directions such as front and back, left and right, up and down are shown for the convenience of description, but the content of the present invention is not limited to these directions. Figure 1 、 Figure 2 In the example of, the Z-axis direction is the up-down direction (the upper side is the +Z direction, and the lower side is the -Z direction), the X-axis direction is the front-back direction (the front side is the +X direction, and the back side is the -X direction), and the Y-axis direction is the left-right direction (the right side is the +Y direction, and the left side is the -Y direction), and the description is based on this. These regulations are the same in Figures 3 to 33 as well.

[0059] Figure 1 The relative size ratios of the dimensions and thicknesses of the respective layers shown in the respective drawings such as are described for convenience and do not limit the actual size ratios. These regulations regarding directions and size ratios are the same in the respective drawings of Figures 2 to 33 as well.

[0060] The lid of the present invention is described by taking the lid used for a container (cup) for filling various fluid substances such as coffee cups as an example, but it is not limited to the lid of a container for filling beverages, and can also be applied as the lid of a container for accommodating foods other than beverages that also have liquids. In addition, the lid of the present invention is not prohibited from being applied to containers for accommodating various items having liquids in addition to beverage foods. Moreover, hereinafter, an example in which the shape of the lid of the present invention is circular when viewed from above is used for the following description, but the shape of the lid is not limited to being circular when viewed from above, and can also be applied to various shapes other than circular shapes such as elliptical shapes, rectangular shapes, triangular shapes and other polygonal shapes, chamfered rectangular shapes, chamfered polygonal shapes, etc. However, from the perspective of further improving the effects of the present invention, the lid is preferably installed on a container containing a mixed fluid or a substance having a mixed fluid as the content.

[0061] In addition, in this specification, a mixed fluid refers to a fluid having a gas phase and a liquid phase, where the gas phase contains a gas and the liquid phase contains a liquid. Examples include a liquid with bubbles (in this case, the gas phase is the gas inside the bubbles, and the liquid phase is composed of the liquid surrounding the bubbles), and a fluid having (dispersed) aerosol-like droplets in a gas (in this case, the gas phase is the gas surrounding the aerosol-like droplets, and the liquid phase is composed of the liquid forming the droplets).

[0062] [1. First Embodiment]

[0063] [1-1 Cover]

[0064] The cover 10 of the first embodiment of the present invention can be used in a state of being installed (fitted) to the edge portion 103 of the opening portion 102 of the container 101 (for the use of the container 150 with a cover) as described later. The cover 10 is formed so that a contact region R that abuts against the edge portion 103 can be formed on the opposite surface side of the cover 10 with respect to the container 101 having the opening portion 102. Figure 15

[0065] In this specification, the opposite surface 73 of the cover 10 refers to the surface facing away from the exposed surface 72, and the exposed surface 72 of the cover 10 refers to the surface that is exposed to the outside in the state of the container 150 with a cover. Therefore, the opposite surface 73 refers to the surface on the body 40 of the cover 10 that faces the container 101 in the state of the container 150 with a cover. In the description of each part constituting the cover 10, for example, for the surface of the top surface portion 11 or the like, the surface facing the same direction as the exposed surface 72 of the cover 10 may sometimes be simply referred to as the exposed surface, and the surface facing the same direction as the opposite surface 73 of the cover 10 may be simply referred to as the opposite surface.

[0066] The cover 10 has a top surface portion 11. In Figure 1 the example shown in A to Figure 1 and D of Figure 1 , the cover 10 has a body 40 having a top surface portion 11. In addition, according to need, the body 40 of the cover 10, as shown in the example of A to Figure 1 and D of Figure 1 , also has a bent portion 12 and a side wall portion 13. In addition, Figure 1 the structure (such as the cross-sectional structure) of the side wall portion 13, the small wall portion 14, the overlapping portion 20, etc. shown in C of is only an example and is not limited thereto. The structure of the overlapping portion 20 (the overlapping manner of the small wall portion 14) may also be formed in a manner that avoids forming the cross-section shown in C of

[0067] (Top Surface Portion)

[0068] As Figure 1As shown in A to D, when the lid 10 is installed (assembled) on the container 101, the top surface portion 11 becomes the portion that covers the opening 102 of the container 101. The shape of the top surface portion 11 can be determined according to the shape of the container 101, and examples include circular shape, elliptical shape, triangular shape, rectangular shape, polygonal shape, chamfered shape, etc.

[0069] (Material of the top surface portion)

[0070] The top surface portion 11 has a sheet-like base material. The material of the top surface portion 11 (the material of the sheet-like base material) can be a paper raw material, plastic, metal, etc., but from the viewpoints of recyclability, and the simultaneous establishment of the shape retention of the lid 10 and environmental considerations (reduction of the use of petroleum resources), a paper raw material is preferred. Therefore, the top surface portion 11 preferably has a paper base material 41 made of a paper raw material (a sheet-like base material used with a paper raw material as the material). In addition, Figure 1 in the example of, in addition to the top surface portion 11, the side wall portion 13 and the bent portion 12 also preferably have a paper raw material (that is, the entire lid 10 has a paper raw material).

[0071] As the paper raw material, it is possible to list so-called paper obtained by scooping a pulp of a fiber raw material onto a net and drying or pressing and drying and papermaking to form a sheet, and so-called airlaid sheets obtained by fiber accumulation of fibrillated fiber raw materials such as pulverized pulp obtained by pulverizing a raw material sheet composed of pulp-based fibers, etc. by an air stream and fixing the fibers of the fiber accumulation body to each other with an adhesive, etc., so-called papers manufactured by adhering plant fibers, other fibers, and materials obtained by laminating multiple sheets of these papers.

[0072] In addition, as the paper raw material, in addition to materials composed only of pulp, it can also be a material of fibers including non-pulp natural fibers, synthetic fibers, recycled fibers, etc., but it is preferably mainly composed of pulp (including 50% by mass or more of pulp), more preferably, including 70% by mass or more, still more preferably, including 80% by mass or more, and particularly preferably, including 100% by mass of pulp. The paper raw material can use woody materials such as wood foil, etc., and can also use composite materials with materials such as aluminum foil, etc., but in the case of using a composite material, as the whole of the composite material, it is preferably, containing 50% by mass or more of pulp, and particularly preferably, containing 80% by mass or more of pulp. The higher the pulp content, the easier the paper material is biodegradable, and thus it is preferred. The material of the lid 10 can also preferably use a laminate including a paper raw material.

[0073] The paper raw material is a sheet material composed of fiber raw materials, and a material that avoids forming a layer (coating) such as a coating agent on the entire surface of the sheet material is preferably used. By avoiding the formation of a coating that covers the entire surface of the sheet material, a lid that is more suitable for recyclability can be formed. However, in the case of using a coating agent that can be dissolved by a solvent or the like, forming a coating on the paper raw material is not prohibited.

[0074] In addition to fiber materials such as pulp, the paper raw material is not prohibited from containing various resins within the range that does not become the main component. However, when the paper raw material contains various resins, it is preferable to select biodegradable resins with fewer environmental pollution problems even among the various resins. Examples of biodegradable resins include: microbial production type biodegradable resins such as polyhydroxyalkanoates (PHA) or PHA copolymers; cellulose derivatives such as cellulose acetate or natural product type biodegradable resins such as starch-based resins with starch such as corn starch as the main raw material; lactic acid resins such as polylactic acid (PLA), polylactic acid / polycaprolactone copolymer, polylactic acid / polyether copolymer, succinic acid resins such as polybutylene succinate (PBS), polybutylene adipate succinate (PBSA), polyethylene terephthalate succinate glycol (PETS), polycaprolactone, polyvinyl alcohol (PVA) and other chemically synthesized biodegradable resins, etc. There are also polyglycolic acid (PGA), polybutylene adipate / terephthalate, biodegradable polyolefins (product names: Biorecover, product name: Cra Drop, etc.).

[0075] In addition, in the lid 10, the top surface portion 11 has a through portion 17 that penetrates the paper raw material, a gas-liquid separation material 42, and a coating agent 48 having thermoplasticity.

[0076] (Through portion)

[0077] In the top surface portion 11, a through portion 17 is formed. In Figure 1 In the example of, in the top surface portion 11 of the main body 40, the through portion 17 is formed at a position closer to the center CT. However, this is only an example, and the position of the through portion 17 is not limited thereto. The portion covering the opening portion 102 refers to the portion covering at least a part of the opening portion 102, including the case where there is a locally openable portion such as the insertion port 16 as described later.

[0078] The through portion 17 has a structure (penetrating structure) that cuts from one surface of the lid 10 in the vertical direction (the thickness direction of the top surface portion 11) (from the exposed surface 72 toward the opposite surface 73) to the other surface, and is a so-called cut-in structure forming portion. The cut-in structure forming portion is a portion formed in a slit shape. The shape of the through portion 17 is not particularly limited. In Figure 1In the example, it is formed in a cross shape, but these are just examples and do not limit the shape of the through portion 17. The shape of the through portion 17 can be C-shaped, U-shaped, or can be formed into other shapes.

[0079] The shape of the through portion 17 is not limited to the case of being formed in a slit shape as described above. The through portion 17 can also be formed into a ring shape. In this case, the through portion 17 can be a hole portion that unfolds the member (the member forming the top surface portion 11) (such as a paper raw material) forming the main body 40, or can be a portion where the member forming the main body 40 is punched and processed.

[0080] (Insertion port)

[0081] Figure 1 In the example, an insertion port 16 for inserting a straw or the like from the outside is formed in the top surface portion 11, and this insertion port 16 becomes a structural portion formed by the through portion 17. That is, Figure 1 In the example, the through portion 17 forms a structural portion that functions as an insertion port 16 for inserting a straw or the like from the outside.

[0082] The through portion 17 is not limited to the structure of forming the insertion port 16, and can also be a structure for forming a ventilation hole that reduces the internal pressure of the container 101 in the state of the container 150 with a lid. However, a structure for forming an opening for forming a drinking port (an opening formed inside the top surface portion 11) (a structure having a small opening portion and a small lid portion that can open and close the small opening portion) as described later is excluded.

[0083] The lid 10 has a gas-liquid separation material 42 on the top surface portion 11 of the main body 40. The gas-liquid separation material 42 has the function of a ventilation sheet. The gas-liquid separation material 42 is disposed at least on the opposite surface 73 side of the surface of the top surface portion 11 that faces the container 101. A ventilation sheet means a sheet material having a degree of ventilation that allows gases such as carbon dioxide and vapors (such as water vapor) to pass from the surface on the side facing one surface (the opposite surface 73 of the lid 10) of the ventilation sheet to the surface on the side facing the other surface (the exposed surface 72 of the lid 10) (the surface facing the main body 40). Gases such as carbon dioxide and vapors (such as water vapor) are sometimes collectively referred to by the term "gases etc.".

[0084] (Gas-liquid separation material)

[0085] The gas-liquid separation material 42 is a sheet material that can separate gaseous gases and at least a part of the liquid phase liquid from a mixed fluid having a gas phase and a liquid phase. As the sheet material constituting the gas-liquid separation material 42, a paper ventilation sheet 43 is preferably used.

[0086] (Paper ventilation sheet)

[0087] The paper ventilation sheet 43 is a sheet material (fiber sheet) that includes fibers 43A and has air permeability. As the fibers of the paper ventilation sheet 43, long fibers are preferably included. From the perspective of strength, the paper ventilation sheet 43 preferably has long fibers as the main component. When the paper ventilation sheet 43 includes long fibers, paper fibers are preferably used as the long fibers. By the main component is meant that 50% by mass or more of the fibers constituting the paper ventilation sheet are long fibers.

[0088] The fibers 43A forming the paper ventilation sheet 43 are preferably the so-called paper fibers (pulp fibers). Therefore, the gas-liquid separation material is preferably a component that can be called gas-liquid separation paper. Examples of pulp fibers include fibers of wood pulp and non-wood pulp. For either wood pulp or non-wood pulp, virgin pulp is preferred from the perspective of maintaining the fiber length in a relatively long state. In addition, regarding pulp fibers, unbleached kraft paper pulp (UKP), bleached kraft paper pulp (BKP), or a combination thereof is preferred from the perspective of obtaining a base paper with excellent wet strength. Unbleached pulp means unbleached wood pulp. Bleached pulp means wood pulp that has undergone a bleaching process. As the bleaching method for bleached pulp, examples include bleaching methods using alkalis, chlorine, sodium hypochlorite, etc., bleaching methods using chlorine dioxide, etc. (ECF (Elementary Chlorine Free) bleaching method), and bleaching methods using oxygen, hydrogen peroxide, ozone, etc. (TCF (Total Chlorine Free) bleaching method). Regarding non-wood pulp, examples include cotton linter pulp, kenaf pulp, bagasse pulp, bamboo pulp, hemp pulp, etc.

[0089] In addition, long fibers mean fibers having a fiber length longer than that of softwood pulp (L material), which has a relatively short fiber length among the pulp fibers commonly used for forming fine paper (usually about 1 mm). As long fibers, fibers of wood pulp obtained from softwood pulp (N material) are preferred from the perspective of obtaining a paper ventilation sheet with excellent wet strength among such pulp fibers. However, as long as the fibers 43A included in the paper ventilation sheet 43 are fibers of a material that on average becomes the above-mentioned fiber length, the case of including fibers with a fiber length shorter than that of softwood pulp (L material) is not completely excluded. That is to say, short fibers with a fiber length shorter than that of long fibers may also be mixed and present in the paper ventilation sheet 43. Specifically, for example, the paper ventilation sheet preferably includes fibers of softwood pulp and may not exclude the inclusion of fibers of softwood pulp.

[0090] (Non-woven fabric sheet)

[0091] The paper ventilation sheet 43 preferably uses a non-woven fabric sheet. A non-woven fabric sheet refers to "a product in which fibers are oriented in one direction or randomly, and the fibers are bonded by crossing and / or fusing and / or adhesion. However, paper, fabric, knitting, tufting, and shrink felt are excluded." as defined as a non-woven fabric in JIS L0222. The non-woven fabric constituting the paper ventilation sheet 43 can be obtained by squeezing fibers (such as pulp fibers) with water or the like as described above. By using such a sheet material for the paper ventilation sheet 43, the manufacturing cost can be reduced, and it is easy to ensure a gap between adjacent fibers 43A.

[0092] (Liquid repellent)

[0093] The gas-liquid separation material 42 has a structure in which a liquid repellent 44 capable of imparting liquid repellency to the paper ventilation sheet 43 is disposed on at least one surface of the paper ventilation sheet 43. As Figure 2 shown in B of, the structure in which the liquid repellent 44 is disposed relative to the paper ventilation sheet 43 means a structure in which the liquid repellent 44 is in contact with the fibers forming the paper ventilation sheet 43. At least a part of the liquid repellent 44 adheres to at least a part of the long fibers. From the viewpoint of preferably using long fibers as the main component for the fibers 43A forming the paper ventilation sheet 43, the gas-liquid separation material 42 preferably has a state in which the liquid repellent 44 adheres to the long fibers of the paper ventilation sheet 43.

[0094] The liquid repellent 44 is not limited to being disposed on the fibers 43A located on the surface and in the vicinity of the paper ventilation sheet 43, and can also be disposed inside the paper ventilation sheet 43 (a position closer to the inside than the surface along the thickness direction of the paper ventilation sheet 43). In this case, even if a part of the liquid contained in the mixed fluid invades slightly inside the paper ventilation sheet 43, the passage of the liquid can be restricted.

[0095] The liquid repellent 44 only needs to adhere to the fibers 43A to such an extent that it can maintain a state of being in close contact with the fibers 43A. In Figure 2 the example of B of, an example in which the liquid repellent 44 adheres to the surface of the fibers 43A in a granular form is shown, but it can also be, as Figure 2 shown in C of, Figure 2 shown in D of, the liquid repellent 44 can adhere in a manner of spreading in the plane direction of the surface of the fibers 43A, or can adhere in a manner of covering the surface of the fibers 43A with a layer of the liquid repellent 44. In addition, the liquid repellent 44 can also penetrate not only the surface of the fibers 43A but also the inside of the fibers 43A (not shown).

[0096] (Types of liquid repellents)

[0097] The liquid repellent 44 is preferably determined according to the type of the liquid of the content accommodated in the container 101 in the state of the container 150 with the lid body. When the liquid of the content includes water, a water repellent is preferably used as the liquid repellent 44. There is no particular limitation on the water repellent, but a fluorine-based water repellent, a silicon-based water repellent, wax, etc. can be used.

[0098] (Method of attaching the water repellent as the liquid repellent)

[0099] The method of attaching the water repellent can represent a method of performing water repellency treatment on the paper ventilation sheet. The method of water repellency treatment is not particularly limited. For example, a method of dipping the paper ventilation sheet into the treatment liquid and drying it after pulling up the dipped paper ventilation sheet can be cited. In addition, a method of coating the surface of the paper ventilation sheet with the treatment liquid can be cited as the method of water repellency treatment. Furthermore, as the coating method, a printing method, etc. can be specifically cited. As the printing method, coating methods such as roll coating and spraying, intaglio printing, screen printing, etc. can be cited.

[0100] (Position of the gas-liquid separation material)

[0101] In the lid body 10, when viewed from above the top surface portion 11, the gas-liquid separation material 42 is arranged so as to cover at least a part of the through portion 17. Thereby, a state in which the gas-liquid separation material 42 is arranged between the space portion 105 of the container 101 and the through portion 17 can be formed, and even if the mixed fluid of the content accommodated in the container 101 moves upward, the risk of its directly reaching the through portion 17 can be suppressed.

[0102] (Cut-in portion)

[0103] The gas-liquid separation material 42 preferably has a cut-in portion 45 formed at a position corresponding to the through portion 17. However, this does not prohibit the lid body 10 from omitting the cut-in portion 45 on the gas-liquid separation material 42. In the container 150 with the lid body, when the through portion 17 is used as the insertion port 16 and a straw or the like is inserted from the outside, the tip of the straw or the like after passing through the through portion 17 easily passes through the gas-liquid separation material 42 downward from the position of the cut-in portion 45 of the gas-liquid separation material 42. In addition, Figure 1 in the example of, the cut-in portion 45 is located at the central position of the insertion port 16 or near it, but as long as it is a structure that allows the tip of a straw or the like to pass through the gas-liquid separation material 42, it can also be as shown in Figure 3 A of, the cut-in portion 45 is formed at a position deviated from the central position of the insertion port 16. In addition, Figure 1In the example, the cutting portion 45 is formed in a linear shape, and the through portion 17 forming the insertion port 16 is formed in a cross shape (crossed shape), and the cutting direction of the cutting portion 45 is a direction deviated from the cutting direction of the through portion 17 (directions with different phases from each other). Thereby, the risk that the mixed fluid in the container 101 passes through the cutting portion 45 and further passes through the through portion 17 can be suppressed. Further, from the viewpoint of suppressing the risk that the mixed fluid in the container 101 passes through the cutting portion 45, preferably, instead of the cutting portion 45, the gas-liquid separation material 42 is formed with a semi-cutting portion 46 as shown in Figure 3 B of

[0104] In addition, the shape of the cutting portion 45 is not limited to the case where it is different from the shape of the through portion 17 forming the insertion port 16. As shown in Figure 5 A to Figure 5 C of Figure 5 A to Figure 5 C of Figure 5 A to Figure 5 C, the shape of the cutting portion 45 may be the same as the shape of the through portion 17 forming the insertion port 16. However, in this case, as shown in Figure 5 A to Figure 5 C, preferably, the cutting direction of the cutting portion 45 is a direction deviated from the cutting direction of the through portion 17 (directions with different phases from each other) (in Figure 5 A to Figure 5 C, the direction in which the cutting direction of the cutting portion 45 is rotated 45 degrees in the plane of the top surface portion 11 is the cutting direction of the through portion 17.). Further, in the case where the shape of the cutting portion 45 is different from the shape of the through portion 17 forming the insertion port 16, the shape of the cutting portion 45 may also be a shape that is not completely consistent with the shape of the through portion 17 forming the insertion port 16 locally. For example, it may be that the shape of the cutting portion 45 is formed by a curved cutting (for example, C-shaped), and the through portion 17 forming the insertion port 16 is formed by a linear cutting (for example, crossed).

[0105] (Inter-fiber gap portion)

[0106] The gas-liquid separation material 42 maintains air permeability even in a state where the liquid-repellent agent 44 is attached to the fibers 43A of the paper air-permeable sheet 43, and there is an inter-fiber gap portion 47 between a plurality of adjacent fibers 43A. In the lid body 10, the inter-fiber gap portion 47 is formed so that a coating agent 48 described later can enter.

[0107] (Coating agent)

[0108] In the lid body 10, the coating agent 48 bonds the gas-liquid separation material 42 to the paper base material 41. The coating agent 48 may be provided on the top surface portion 11 of the main body 40 in such a manner that the gas-liquid separation material 42 can be fixed, and its area may not be particularly limited. However, from the viewpoint of ensuring recyclability, etc., it is preferably provided in a specified area on the side of the opposite surface 73 of the top surface portion 11 of the main body 40 in a limited manner. The area where the coating agent 48 is provided is defined as an area corresponding to the area where the above-mentioned gas-liquid separation material 42 is disposed. In Figure 1 from A to Figure 1 in the example of D of, the area where the coating agent 48 is provided is defined as an area slightly inside the outer peripheral edge of the gas-liquid separation material 42 and an annular area corresponding to the outside of the area corresponding to the through portion 17. However, this is only an example. The area where the coating agent 48 is provided may be formed in such a manner that the gas-liquid separation material 42 and the paper base material 41 can be bonded, and it may not be annular. However, from the viewpoint of suppressing the risk of the mixed fluid invading between the outer peripheral edge of the gas-liquid separation material 42 and the paper base material 41, the area where the coating agent 48 is provided is preferably annular. In addition, from the viewpoint of bonding the gas-liquid separation material 42 to the paper base material 41, it is also possible to consider providing the coating agent 48 on the entire surface of the area where the gas-liquid separation material 42 and the paper base material 41 face each other. However, in this case, it is considered that since the entire surface of the gas-liquid separation material 42 is fixed by the coating agent 48, the cushioning property of the gas-liquid separation material 42 is likely to be reduced, and in the case where the flow rate of the mixed fluid is large, there is a risk that a part of the liquid contained in the mixed fluid passes through the gas-liquid separation material 42. From this viewpoint, the area where the coating agent 48 is provided is also preferably a part such as an annular shape. Figure 1 In the example of, on the lid body 10, when viewed from above the lid body 10 (when the Z-axis direction is the line-of-sight direction), there is a non-bonding portion 82 inside the area where the coating agent 48 is provided. In the non-bonding portion 82, a gap 83 may exist between the top surface portion 11 and the gas-liquid separation material 42, or the top surface portion 11 and the gas-liquid separation material 42 may be in contact (the gap 83 may be omitted).

[0109] (Type of coating agent)

[0110] The type of the coating agent 48 is not particularly limited as long as it has thermoplasticity, and examples thereof include thermoplastic resins. Specifically, examples of the coating agent include polyethylene (PE), polyethylene terephthalate (PET), etc. By making the coating agent have thermoplasticity, the gas-liquid separation material 42 and the paper base material 41 can be joined via the coating agent 48 using heat sealing method, ultrasonic bonding method, etc. The portion where the gas-liquid separation material 42 and the paper base material 41 are joined is called the separation paper joint portion 49. In addition, from the viewpoint of reducing the use of plastic materials, the coating agent is preferably a resin made of non-plastic.

[0111] (Strength of the separation paper joint)

[0112] In addition, in the lid body 10, the inter-fiber gap portion 47 is formed on the gas-liquid separation material 42 as described above, and the separation paper joint portion 49 preferably has a structure in which the coating agent 48 enters the inter-fiber gap portion 47. Further, the degree to which the coating agent 48 enters the inter-fiber gap portion 47 in the separation paper joint portion 49 is preferably such that, at normal temperature and pressure (25°C, under one atmosphere), when it is desired to separate the gas-liquid separation material 42 and the coating agent 48, damage (internal damage) occurs in the gas-liquid separation material 42 and / or the coating agent 48. In addition, with respect to the coating agent 48 and the paper base material 41, it is also preferably such that, at normal temperature and pressure (25°C, under one atmosphere), when it is desired to separate the paper base material 41 and the coating agent 48, damage occurs in the paper base material 41 and / or the coating agent 48. Therefore, the bonding strength of the portion where the gas-liquid separation material 42 and the paper base material 41 are joined in the separation paper joint portion 49 is not such that delamination occurs between the gas-liquid separation material 42 and the coating agent 48 and between the paper base material 41 and the coating agent 48 at normal temperature and pressure (25°C, under one atmosphere), but is preferably the strength of the degree that accompanies the damage of each part such as the gas-liquid separation material 42, the paper base material 41, and the coating agent 48.

[0113] Figure 1 from A to Figure 1 In the example of the lid body 10 shown in D of, as described above, the main body 40 has a side wall portion 13 and a bent portion 12 in addition to the top face portion 11, and the top face portion 11 and the side wall portion 13 are continuous through the bent portion 12.

[0114] (Bent portion)

[0115] The bent portion 12 is formed so as to surround the outer peripheral edge of the top face portion 11, and becomes the portion that forms the boundary between the top face portion 11 and the side wall portion 13. The bent portion 12 is formed such that, when the lid body 10 is attached to the container 101, the side wall portion 13 faces the side wall 104 and the edge portion 103 of the container 101. In Figure 1 from A to Figure 1 In the example of D of, the bent portion 12 has a folding structure, but as will be described later, the bent portion 12 is not limited to having a folding structure. In addition, "the portion that forms the boundary between the top face portion 11 and the side wall portion 13" includes either the case where this portion itself becomes the boundary or the case where the boundary is defined inside or at the end of this portion (the case where a part of the top face portion 11 and / or the side wall portion 13 also serves as the bent portion 12). Figure 1 from A to Figure 1In the case of D, the curved portion 12 is formed at the boundary position between the top face portion 11 and the side wall portion 13, and the top face portion 11 and the side wall portion 13 are divided by the curved portion 12 as the boundary. The boundary between the top face portion 11 and the side wall portion 13 is defined at the center of the curved portion 12. Figure 8 A to Figure 8 In the case of a curved structure such as B described later, the curved portion 12 is composed of a specific portion within the curved range, and the boundary between the top surface portion 11 and the side wall portion 13 is defined by the approximate center of the curved portion 12. This is also the case when the extended portion 226 described later forms the curved portion 12.

[0116] (Side wall)

[0117] The side wall portion 13 is formed in an annular shape along the outer peripheral end 11A of the top surface portion 11. The side wall portion 13 has a plurality of small wall portions 14 described below, and has an overlapping portion 20 where adjacent small wall portions 14 partially overlap. The overlapping portion 20 is formed with a small wall joint portion 15 that joins adjacent small wall portions 14.

[0118] (Overall shape of the side wall)

[0119] The shape of the side wall portion 13 is not particularly limited, but Figure 1 A to Figure 1 In the example of D, the overall shape of the side wall portion 13 is a shape that tapers at the front end in the direction from the curved portion 12 toward the front end of the small wall portion 14 along the up-down direction (-Z direction). The so-called tapered shape here means that when the cover body 10 is viewed from above, in the cross section of the side wall portion 13 (the cross section of the side wall portion 13 is also considered in the case of assuming that the side wall portion 13 is cut by a plane parallel to the XY plane), the cross section of the side wall portion 13 at a predetermined position on the lower side compared to the curved portion 12 is formed on the inside of the cross section of the side wall portion 13 at a position near the curved portion 12, Figure 1 In the examples A to D of FIG. 1 , the cross section of the side wall portion 13 is formed so as to become smaller as it moves away from the position of the curved portion 12. In addition, regarding the shape of the side wall portion 13, there is a shape of the inner peripheral surface 13A of the side wall portion 13 and a shape of the outer peripheral surface 13B of the side wall portion 13, but as shown in FIG. Figure 1 As shown in the examples A to D, it is preferred that any one of the shapes conform to a shape in which the tip is tapered.

[0120] (Small wall)

[0121] The cover body 10 has a plurality of small wall portions 14, which are formed in a manner connected to the top surface portion 11 via the curved portion 12. The small wall portion 14 has a base end portion 31 and a front edge portion 32, the base end portion 31 is located at the curved portion 12, and the front edge portion 32 forms the lower end of the side wall portion 13.Figure 1 from A to Figure 1 In the example of D, the base end portion 31 forms the upper end of the side wall portion 13, but this is just one example.

[0122] In addition, a portion of the outer peripheral edge of the small wall portion 14 other than the base end portion 31 and the front end edge portion 32 forms the side end portion 33. The shape of the side end portion 33 is not particularly limited as long as it can form the overlapping portion 20 described later, but preferably, it is formed in a shape such that the side end portion 33 of one small wall portion and the side end portion 33 of the other small wall portion facing the side end portion 33 of this small wall portion among the adjacent small wall portions 14 in the state of the blank 50 described later are parallel to each other. In addition, Figure 1 in the example of, the shape of the side end portion 33 is formed in a straight line shape extending in the outward direction (radial direction of the blank 50) from the center ( Figure 7 position CB in A of) of the blank 50 when viewed from above the blank 50 described later. The small wall portion 14 is constituted by respective bending allowance portions 51 in the blank 50 described later. In addition, when Figure 7 the blank 50 shown in the example in A of is shaped to form Figure 1 the lid body 10 in A of, the center CB of the blank 50 approximately becomes the position of the center CT of the lid body 10.

[0123] The small wall portion 14 is formed so as to surround the outer peripheral end 11A of the top surface portion 11. That is, a plurality of small wall portions 14 are formed so as to be arranged in the circumferential direction of the top surface portion 11 along the bending portion 12. In addition, the adjacent small wall portions 14 partially overlap. The overlapping structure in which the adjacent small wall portions 14 overlap can be the same structure for all the small wall portions 14 arranged in the circumferential direction of the top surface portion 11. For example, when Figure 1 the side end portion 33 on the -X direction side of the side end portion 33 of the small wall portion 14 is defined as the first side end portion 33A and the side end portion 33 on the +X direction side is defined as the second side end portion 33B and the side end portion 33 of the small wall portion 14 is observed, the first side end portion 33A and the second side end portion 33B are defined such that the direction from the first side end portion 33A toward the second side end portion 33B is the same as the clockwise direction of the circumferential direction of the top surface portion 11. At this time, as Figure 1 shown in the example of, the overlapping structure of the adjacent small wall portions 14 is defined such that the first side end portion 33A is located on the inner peripheral surface 13A side of the side wall portion 13 and the second side end portion 33B is located on the outer peripheral surface 13B side of the side wall portion 13. In addition, this is one example and does not limit the overlapping structure of the adjacent small wall portions 14

[0124] Figure 1 in B of and Figure 1In the example of D, the small wall portion 14 has an inner surface portion 34 which is the surface facing the container side in the state of being mounted on the container 101, and an outer surface portion 35 which is the surface on the opposite side of the inner surface portion 34. The exposed portion in the inner surface portion 34 of the small wall portion 14 forms the inner peripheral surface 13A of the side wall portion 13. In addition, Figure 1 B of Figure 1 In the example of D, the exposed portion in the outer surface portion 35 of the small wall portion 14 forms the outer peripheral surface 13B of the side wall portion 13.

[0125] The shape of the small wall portion 14 is not particularly limited, but preferably, the width of at least a part of the small wall portion 14 is such that the width of the front end edge portion 32 is larger than the width of the base end portion 31. In this case, as Figure 1 shown in the example of B, preferably, the width WN of the small wall portion 14 gradually increases from the base end portion 31 toward the front end edge portion 32. As such a shape, the shape of the small wall portion 14 can be a fan shape.

[0126] The small wall portion 14 preferably has a resin layer (preferably a thermoplastic resin layer) formed on at least one surface side of the inner surface portion 34 and the outer surface portion 35. In this case, when forming the lid body 10 from the blank 50 described later by performing heat treatment, ultrasonic welding treatment, etc., it is possible to easily form the small wall joint portion 15 at the overlapping portion 20. This can be achieved by using a sheet having a resin layer formed on at least one surface as the material of the lid body 10 (as the material of the blank 50). In addition, as an example of the sheet, specifically, a layer formed of a paper raw material (for example, paper) and a material having a laminated structure with a resin layer (for example, coated paper) can be cited.

[0127] (Overlapping portion)

[0128] An overlapping portion 20 is formed in the side wall portion 13. The overlapping portion 20 is a portion defined by a structure in which a part of adjacent small wall portions 14 overlap. In Figure 1 Examples A to D above, among the surfaces constituting the small wall portion 14 as described above, the surface facing the container 101 in the state of being mounted on the container 101 is set as the inner surface portion 34, and the surface on the opposite side of the inner surface portion 34 is set as the outer surface portion 35. In this case, the overlapping portion 20 is defined as the portion where the inner surface portion 34 of one small wall portion 14 faces the outer surface portion 35 of another small wall portion 14. Figure 1In Examples A to D, in the case where adjacent small wall portions 14 are the first small wall portion 14A and the second small wall portion 14B (for example, in the case where the first small wall portion 14A and the second small wall portion 14B are defined such that the direction from the first small wall portion 14A toward the second small wall portion 14B is the clockwise direction), the inner surface portion 34 of the first small wall portion 14A faces the outer surface portion 35 of the second small wall portion 14B.

[0129] The region of the overlapping portion 20 is not particularly limited, but preferably has a portion where the width of the overlapping portion 20 increases from the base end portion 31 of the small wall portion 14 toward the front edge portion 32. In Figure 1 Examples A to D, the region of the overlapping portion 20 has a shape in which the width WK of the overlapping portion 20 gradually increases from the base end portion 31 of the small wall portion 14 toward the front edge portion 32. If the region WK of the overlapping portion 20 is formed in this way, the formation region of the small wall joint portion 15 described later can also be easily formed in the same manner as the region of the overlapping portion 20, and a structure that enhances the effect achieved by the small wall joint portion 15 can be easily formed. In the case where a straight line M connecting the two end portions 31A and 31B of the base end portion 31 of the small wall portion 14 is assumed, the width of the overlapping portion 20 ( Figure 1 the width WK in B) means the length in the direction parallel to the straight line M among the lengths in the region along the surface of the overlapping portion 20.

[0130] (Small wall joint portion)

[0131] In the overlapping portion 20, the surfaces of the small wall portions 14 constituting the overlapping portion 20 that face each other are joined, and the joined portion becomes the small wall joint portion 15. Figure 1 In Examples A to D, it is defined as the portion formed by joining the outer surface portion 35 of the first small wall portion 14A and the inner surface portion 34 of the second small wall portion 14B. By forming the small wall joint portion 15, the free movement between adjacent small wall portions 14 can be restricted, and the overall shape of the side wall portion 13 can be easily stabilized. In particular, different from the conventional wrinkle-like structure in which fine wrinkles and creases are densely formed by shaping a blank, the small wall joint portion 15 becomes a surface-joined portion, and thus the shape of the side wall portion 13 is more easily stabilized. In addition, this does not prohibit the formation of the conventional wrinkle-like structure on other portions other than the small wall joint portion 15.

[0132] The formation region of the small wall joint portion 15 is not particularly limited as long as it is a region capable of suppressing the small wall portion 14 constituting the side wall portion 13 from freely rotating about the base end portion 31. However, from the following viewpoints, that is, maintaining the shape stability of the lid body 10, while it is difficult to generate deformation on the side wall portion 13 at a position far from the bent portion 12 (a position close to the lower end of the side wall portion 13), and relatively large deformation can be generated on the side wall portion 13 near the bent portion 12 compared to the lower end of the side wall portion 13, it is preferably that the width WD of the small wall joint portion 15 has a portion that becomes larger from the bent portion 12 toward the front end of the small wall portion 14. In this case, it is preferably the same for the formation region of the overlapping portion 20. In this case, in cooperation with the formation of the overlapping portion 20, a heat fusion bonding process (heating process, etc.) and an ultrasonic welding process are performed on the overlapping portion 20, whereby the overlapping portion 20 and the small wall joint portion 15 can be formed approximately simultaneously. The width of the small wall joint portion 15 ( Figure 1 in which is the width WD) refers to the length in the direction parallel to the above-mentioned straight line M among the lengths of the regions along the surface of the small wall joint portion 15. In addition, as a portion for fixing the small wall portion 14 by adhesion or the like, a structure is formed by joining the surfaces of the small wall portions 14 facing each other that will become the small wall joint portion 15. Specifically, it can be a portion where an adhesive or a resin (thermoplastic resin) is disposed on at least one portion corresponding to the facing small wall portion 14 and at least a portion corresponding to at least a part of the overlapping portion 20 and is fixed via the adhesive or the resin.

[0133] Figure 1 In the examples A to D of, the width WD of the small wall joint portion 15 gradually becomes larger from the base end portion 31 of the small wall portion 14 toward the front end edge portion 32. As a formation region of such a small wall joint portion 15, a formation region having a substantially fan shape (a shape obtained by partially overlapping sectors) can be cited.

[0134] [1-2 Blank for Lid Body and Manufacturing Method]

[0135] As Figure 1 shown in A to D of, in the present invention, the lid body 10 has a three-dimensional shape as a whole by making the surface directions of the top surface portion 11 and the side wall portion 13 different. Such a three-dimensional shape of the lid body 10 can be realized, for example, by deforming (shaping) a blank for the lid body into a shape corresponding to the shape of the lid body 10 using a forming device or the like. In addition, in this specification, the blank for the lid body may sometimes be simply referred to as a blank.

[0136] (Blank for Lid Body)

[0137] The blank for the lid body (blank 50) is a blank 50 corresponding to the lid body 10. For example, regarding Figure 1The blank 50 of the lid body 10 shown in Examples A to D is constituted by a sheet-like structure formed into a shape according to the lid body 10. The material of the blank 50 is specified to be the same as the material of the lid body 10. In addition, when the blank 50 is in a sheet shape, it includes cases where through-holes 17, tab members 19, etc. are provided at corresponding positions corresponding to the shape and structure of the lid body 10 as described later, for example.

[0138] (First corresponding part and second corresponding part)

[0139] As Figure 7 shown in A of, the blank 50 has a first corresponding part 52 and a second corresponding part 53. Among them, the part of the blank 50 corresponding to the part that becomes the top surface part 11 of the lid body 10 is the first corresponding part 52, and the part corresponding to the part that becomes the side wall part 13 is the second corresponding part 53.

[0140] As Figure 7 shown in A of, corresponding to Figure 1 shown in A of the lid body 10, an example of the blank 50 can be a blank formed from a sheet material in which a gas-liquid separation material 42 is disposed on a circular sheet 55 as a paper base material 41. The blank 50 has a plurality of cut-in parts 54 that extend from the outer peripheral edge of the sheet 55 toward the inside. In Figure 7 the case of the example in A of, the part between adjacent cut-in parts 54 along the outer peripheral edge of the sheet 55 becomes a bending margin part 51 that bends when the blank 50 is shaped. The part formed by the combination (aggregate) of the bending margin parts 51 forms the second corresponding part 53. In addition, as Figure 7 shown in B of, when bent in the direction of arrow FD, when the blank 50 changes its shape to the lid body 10, the bending margin part 51 becomes a small wall part 14 (or a part of the small wall part). In addition, Figure 7 A of etc. is an example of the blank 50. For example, the blank 50 can also be configured to be bent at a specified position that is more on the center side than the position of the inner end of the cut-in part 54.

[0141] (Manufacturing method of the lid body)

[0142] The lid body 10 can be manufactured, for example, by shaping the blank 50 into a shape corresponding to the shape of the lid body 10 using a lid body forming device or the like. As the lid body forming device, an example is a device (not shown) having a pair of molds, a male mold and a female mold. Separating the male mold and the female mold, disposing the blank 50 between the male mold and the female mold, and then closing the mold can perform the shaping. At this time, the blank 50 bends at the inner end of the second corresponding part 53 (the boundary between the first corresponding part 52 and the second corresponding part 53) and in its vicinity. At this time, in Figure 7The adjacent bending allowance portions 51 shown in D form a superimposed structure (superimposed portion 20). Conditions such as the width of the superimposed portion 20 can be determined by adjusting the shape of the mold and the control of the lid forming device, etc. In addition, through the shaping of the blank 50, the first corresponding portion 52 becomes the top surface portion 11, and the second corresponding portion 53 becomes the side wall portion 13. Figure 7 In the example of A, the bending allowance portion 51 forming the second corresponding portion 53 becomes the small wall portion 14. And in this example, the boundary between the first corresponding portion 52 and the second corresponding portion 53 is approximately the bending portion 12.

[0143] In addition, in the case where Figure 1 the side wall portion 13 of the lid 10 has a tapered front end shape as shown, from the viewpoint of achieving mold clamping, it is preferable that at least one of the male mold and the female mold is a mold that can be divided.

[0144] Furthermore, from the viewpoint of forming the small wall joint portion 15 simultaneously with the shaping of the blank 50, it is preferable that a joint mechanism for forming the small wall joint portion 15 is provided in the lid forming device. As the joint mechanism, examples include a heating mechanism configured to be able to perform a heating treatment for at least heating a part of the superimposed portion 20, an ultrasonic welding mechanism configured to be able to perform an ultrasonic welding treatment on a part of the superimposed portion 20, etc. In addition, from the viewpoint of forming the small wall joint portion 15 by heating treatment, with respect to the portion that becomes the superimposed portion 20, it is preferable that an adhesive and a resin are pre - arranged at the stage before the heating treatment.

[0145] [1 - 3 Functions and Effects]

[0146] In a lid attached to a container, a through - hole is formed in the top surface portion. If there is liquid in the contents of the container in the state of the container with the lid, there is a risk that a mixed fluid of liquid and gas leaks from the through - hole to the outside of the container. In particular, when the liquid contained in the container with the lid is a hot liquid or a liquid containing carbonic acid, gases such as vapor and carbonic acid fill the container with the lid, and these gases are ejected from the through - hole of the lid to the outside. And if the container with the lid is moved, the liquid level will fluctuate along with the movement of the liquid in the container, and sometimes a part of the fluctuating liquid is carried by the airflow of the gas about to be ejected to the outside of the container and is rolled up with the gas and ejected from the through - hole to the outside.

[0147] Moreover, for the lid, from the viewpoint of reducing environmental burden, it is required to reduce the use of petroleum raw materials. From the viewpoint of reducing the use of petroleum raw materials, it is required to use paper materials as much as possible. Also, similarly from the viewpoint of reducing environmental burden, it becomes important to improve the recyclability of the lid. Therefore, for the lid, it is required to use paper raw materials, be able to prevent the contents from leaking out of the container with the lid, and have recyclability.

[0148] The lid 10 according to the present invention has a special structure for separating the gas FGA and the liquid FLI from the mixed fluid FW, thereby preventing the contents from leaking out of the container 150 with the lid. For example, as shown in A of Figure 2 , when the mixed fluid FW collides with the gas-liquid separation material 42 from the inside of the container 101, the gas FGA moves to the outside through the inter-fiber gap portion 47 of the gas-liquid separation material 42, but the liquid FLI is easily repelled by the liquid repellent 44 disposed on the fiber 43A of the gas-liquid separation material 42. And, due to the self-weight of the liquid FLI or the like, it falls again to the lower part of the container 101. Thus, according to the lid 10, the gas FGA and the liquid FLI can be separated from the mixed fluid FW. In addition, even if the potential energy of the mixed fluid is strong and the liquid FLI slightly enters the inter-fiber gap portion 47 toward the inside of the gas-liquid separation material 42, the liquid FLI collides with the fiber 43A, the liquid droplets are crushed, and the potential energy is weakened. And, when the liquid repellent 44 is disposed inside the gas-liquid separation material 42, finally the liquid FLI of the mixed fluid FW is repelled by the liquid repellent 44 inside the gas-liquid separation material 42 and easily falls again to the lower part of the container 101 due to the self-weight of the liquid FLI or the like.

[0149] In addition, particularly according to the lid 10 of the present invention, the structure for separating the gas FGA and the liquid FLI is the gas-liquid separation material 42, and the top surface portion 11 is composed of a paper base material 41, whereby a state in which the pulp fibers are exposed on both sides (the exposed surface 72 and the opposite surface 73) of the lid 10 can be formed. Therefore, when recycling, the pulp fibers can be efficiently fibrillated, and the resin component and the pulp fibers can be easily separated. Thus, according to the lid 10 of the present invention, it is easy to further improve the recyclability.

[0150] Figure 1 A to Figure 1In the lid shown in the example of D, the side wall portion 13 has a structure in which a plurality of small wall portions 14 continuous with the top face portion 11 are partially overlapped, and a structure capable of forming the top face portion 11 and the side wall portion 13 by shaping a sheet blank 50. Further, in the lid of the present invention, the small wall joint portion 15 extends in the plane direction (circumferential direction) of the side wall portion 13. Thus, compared with a conventional lid having a structure with creases and wrinkles in the side wall portion, even when a force that expands in the plane direction acts on the side wall portion 13, the risk of the side wall portion 13 irreversibly expanding outward can be suppressed. That is, when the lid 10 is assembled to a container 101 whose size is slightly larger than the inner peripheral surface 13A of the side wall portion 13 of the lid 10, even when a force in the direction of expanding the side wall portion 13 (a force that expands the side wall portion 13 in the circumferential direction) acts on the side wall portion 13 of the lid 10, a state in which the side wall portion 13 irreversibly expands hardly occurs, and it is easy to maintain the state in which the lid 10 is firmly assembled to the container 101. Also, the risk of the airtightness of the container 150 with the lid being impaired due to the unintentional stretching of the side wall portion 13 of the lid 10 can be suppressed.

[0151] In a conventional lid having a structure with creases and wrinkles in the side wall portion, the members constituting the side wall portion are continuous at the formation sites of the wrinkles (no or few cut marks). In the lid of the present invention, adjacent small wall portions 14 are truncated, and in the side wall portion 13, the side end faces of the small wall portions 14 are formed as the side ends of the overlapping portion 20. Therefore, when the lid of the present invention is formed to have the same cross-sectional area as a conventional lid having a structure with creases and wrinkles in the side wall portion, if the total area of the facing contact regions (the facing contact regions of the portions forming the wrinkles and creases) where the members forming the side wall portion in the conventional lid face each other and contact is set as ARA1, and the total area of the overlapping portion 20 in the lid of the present invention is set as ARA2, then ARA2 is greater than ARA1. That is, the total area of the small wall joint portion 15 formed in the overlapping portion 20 can be increased compared with the joint area when wrinkles and creases are joined in the conventional lid. In this regard, the lid of the present invention can also make the shape of the side wall portion 13 more stable compared with the conventional lid.

[0152] [1 - 4 Deformation Examples of the Lid]

[0153] (Deformation Example 1)

[0154] In the lid of the first embodiment, the shape of the gas-liquid separation material 42 is not particularly limited. The gas-liquid separation material 42 can be, for example, Figure 17 from A to Figure 17 the rectangular shape shown in C of (Deformation Example 1). This form is referred to as Deformation Example 1 of the first embodiment. Figure 17 Fig. A is a top view for explaining one embodiment of Deformation Example 1 of the first embodiment. Figure 17Figure B is a side view of an example illustrating Modification 1 of the first embodiment.

[0155] Figure 17 Figure C is a cross-sectional view of an example illustrating Modification 1 of the first embodiment.

[0156] (Modification 2)

[0157] In the lid body of the first embodiment, the overlapping structure of the adjacent small wall portions 14 forming the overlapping portion 20 may also be a structure different from Figure 1 the example

[0158] (Modification 3)

[0159] In the lid body 10 of the first embodiment, the bent portion 12 is not limited to having a bent shape (a folded shape), and may also have a curved shape.

[0160] (Modification 4)

[0161] The lid body 10 of the first embodiment is not limited to the case where the side wall portion 13 is formed in such a manner that the front end tapers in the direction away from the bent portion 12 ( Figure 1 in B, C, etc. above, the downward direction (-Z direction)). For example, the lid body 10 of the first embodiment may be such that the side wall portion 13 is formed in a shape where the front end thickens. In addition, for example, the lid body 10 of the first embodiment may be such that the side wall portion 13 has a shape where the cross-sectional area is fixed (a shape where the front end neither thickens nor tapers). For example, the lid body 10 of the first embodiment may be such that the side wall portion 13 has a shape with a locally enlarged diameter and a locally reduced diameter. For example, the lid body 10 of the first embodiment may be such that the side wall portion 13 has a flared shape (a shape that expands in a trumpet shape).

[0162] (Modification 5)

[0163] In the lid body 10 of the first embodiment, it may also be the case that, as Figure 6 shown in A to Figure 6 B, a drinking port forming structure 18 for forming a drinking port is formed on the top surface portion 11 in addition to the through portion 17 (Modification 5). Figure 6 Figures A to B are top views of an example of the top surface portion 11 of the lid body 10 illustrating Modification 5 of the first embodiment. Figure 6Among A and B, the drinking port forming structure 18 is formed by a small opening 18A, a small lid portion 18B covering the small opening 18A, a base portion 18D forming the periphery of the small opening 18A, and a hinge portion 18C serving as a rotation axis when the small lid portion 18B is lifted. When the small lid portion 18B is lifted from the base portion 18D about the hinge portion 18C, the small opening 18A is exposed. The exposed small opening 18A becomes the drinking port. In addition, when the drinking port forming structure 18 is formed, as Figure 6 of A and Figure 6 as shown in B of

[0164] In the lid 10 of the modified example 5 of the first embodiment, preferably, the gas-liquid separation material 42 is disposed on the lower surface 11B of the top surface portion 11 so as to avoid the small lid portion 18B of the drinking port forming structure 18. By disposing the gas-liquid separation material 42 so as to avoid the small lid portion 18B, even if Figure 6 as shown by the dashed line in B of Figure 6 the small lid portion 18B is lifted about the hinge portion 18C (in B of

[0165] (Modified example 6)

[0166] In the lid 10 of the first embodiment, it may also be the case that when the bent portion 12 and the side wall portion 13 are provided, as Figure 8 from A of Figure 8 to B of Figure 8 A of Figure 8 is a plan view showing an example of the modified example 6 of the first embodiment. Figure 8 B of Figure 8 is a cross-sectional view showing an example of the modified example 6 of the first embodiment. In the examples from A of

[0167] (Protruding portion)

[0168] Figure 8 from A ofFigure 8 In an example of the lid 10 according to Modification 6 of the first embodiment shown in FIG. B, a protruding portion 226 is formed in a specified region on the outer peripheral end side of the top surface portion 11 as a structure protruding obliquely upward (bulging structure). However, the protruding direction of the protruding portion 226 may be upward or may be lateral (the planar direction of the top surface portion 11). In addition, the inner surface 226A side of the protruding portion 226 becomes a recessed portion (recessed portion 227). The shape of the recessed portion 227 becomes a shape corresponding to the shape of the protruding portion 226. This can be achieved according to the shape of the mold when forming the lid 10 from the blank 50. The size of the recessed portion 227 is preferably a size that can accommodate the fitting of the edge portion 103 of the container 101. If the size of the recessed portion 227 is such a size, when using the lid 10 as a container 150 with a lid, the edge portion 103 generally enters the recessed portion 227, and the outer end portion of the edge portion 103 ( Figure 20 In the example, the outer peripheral surface portion 111 of the edge portion 103) can be in surface contact with the recessed portion 227, and it is easy to firmly assemble the lid 10 by the edge portion 103 of the container 101.

[0169] (Protruding portion)

[0170] As Figure 8 shown in FIGS. A to Figure 8 B, it is also possible that a protruding portion 225 is formed on the side wall portion 13. The protruding portion 225 is defined, for example, as a portion protruding in the inner direction (center CT direction, the direction from the outer peripheral surface 13B of the side wall portion 13 toward the inner peripheral surface 13A) at a specified position on the side wall portion 13. The protruding portion 225 is preferably formed as a strip-shaped protruding rib portion so as to surround the inner peripheral surface of the side wall portion 13 for one week. It is also possible that a convex structure with the protruding portion 225 is formed on the inner peripheral surface side of the side wall portion 13, and a concave portion 224 is formed at a position corresponding to the position where the convex structure is formed on the outer peripheral surface 13B side of the side wall portion 13. By forming such a structure, the shape of the side wall portion 13 can be made more stable.

[0171] (Modification 7)

[0172] In the lid 10 according to Modification 6 of the first embodiment, it is also possible that, as Figure 9 shown in FIGS. A to Figure 9 C, not only on the top surface portion 11, but also in the range from the bending portion 12 to the protruding portion 226 and the protruding portion 225 (Modification 7), the gas-liquid separation material 42 is arranged. This form is called Modification 7 of the first embodiment. Figure 9 FIG. A shows a plan view of an example of Modification 6 of the first embodiment. Figure 9 FIG. B shows a cross-sectional view of an embodiment of Modification 6 of the first embodiment. Figure 9C shows a state in which a part of the region EI indicated by the single-dot chain line is enlarged. Figure 9 from A to Figure 9 In the example of C, the gas-liquid separation material 42 is continuously arranged from the portion of the top surface portion 11 facing the specified region including the through portion 17 to the region on the inner surface side of the protruding portion 226 and the vicinity of the tip on the inner surface side of the convex portion 225 (the opposite surface side facing the container 101). According to the lid 10 of the fifth modification of the first embodiment, when the lid 10 is used as the lid-equipped container 150, a state in which the gas-liquid separation material 42 exists between the edge portion 103 of the container 101 and the inner surface 226A side of the protruding portion 226 is formed, and the risk of liquid leakage from between the edge portion 103 and the inner surface 226A side of the protruding portion 226 can be more effectively suppressed.

[0173] (Modification 8)

[0174] In the lid 10 of the first embodiment, it is also possible that the paper ventilation sheet 43 constituting the gas-liquid separation material 42 does not have the fibers 43A arranged in a particularly approximate direction (in a state where the orientation is restricted) as shown in the example of A of Figure 2 , but as shown in the example of B of Figure 2 , the fibers may be arranged in a state of facing a generally specified direction (Modification 8). The form in which the orientation of the fibers 43A is generally determined is called Modification 8 of the first embodiment. Figure 2 B of shows a gas-liquid separation material 42 in an embodiment of Modification 8 of the first embodiment.

[0175] Among the fibers 43A contained in the paper ventilation sheet 43 constituting the gas-liquid separation material 42, when a plurality of fibers 43A are arranged, the orientation of the fibers 43A can be generally in one direction, or can be generally in a plurality of directions (two directions, etc.) as shown in B of Figure 2 . Here, the case where the fibers 43A are oriented in a specific direction is not limited to the case where all the fibers 43A are arranged with the specific direction as the long side direction, and also includes the case where the long side direction of a part of the fibers 43A deviates from the specific direction. In addition, the paper ventilation sheet 43 may have a difference in fiber density (coarseness and fineness of fiber density) from the viewpoint of the fiber density at different positions in the plane direction of the paper ventilation sheet 43. In addition, when the paper ventilation sheet 43 has a difference in fiber density (coarseness and fineness of fiber density), the surface shape of the paper ventilation sheet 43 may also be formed with irregularities such that the portion with a high fiber density becomes a convex portion and the portion with a low fiber density becomes a concave portion. Figure 2 In the example of B of , the portions with a high fiber density are formed in a generally lattice shape, and there are portions with a low fiber density around the portions with a high fiber density.

[0176] (Modification Example 9)

[0177] In the lid 10 of the first embodiment, the arrangement range of the coating agent 48 is not limited to the region where the gas-liquid separation material 42 faces the top surface portion 11. As shown in A to Figure 18 of Figure 18 and C of Figure 18 of A to Figure 18 and C of Figure 18 of A to Figure 18 and C of

[0178] (Modification Example 10)

[0179] In the lid 10 of the first embodiment, if the viewpoint of recyclability is emphasized as an effect, it is preferable that the arrangement range of the coating agent 48 is extremely small. However, in the case of emphasizing the firmness of the lid 10 and the effect of stably bonding the gas-liquid separation material 42 to a firm structural portion, the arrangement range of the coating agent 48 is not limited to the region on the single-sided side of the gas-liquid separation material 42 and the top surface portion 11, and it is not prohibited to be formed on both sides of the top surface portion 11 as shown in A to Figure 19 of Figure 19 and C of Figure 19 of A to Figure 19 and C of Figure 19 of A to Figure 19 and C of Figure 19 of A to Figure 19 and C of

[0180] [2 Second Embodiment]

[0181] [Configuration of 2-1]

[0182] As Figure 10 A of Figure 10 illustrated by B of, the lid 10A of the second embodiment has a top surface portion 11, a bent portion 12, and a side wall portion 13. A through portion 17 and a gas-liquid separation material 42 are provided in the top surface portion 11, but it may be the same as the first embodiment, and thus the description is omitted. Figure 10 A of Figure 10 B of is a perspective view and a cross-sectional view showing an example of the lid of the second embodiment. Figure 10 In B of, the reference numeral 274 corresponds to the portion that contacts the edge portion 103 of the container 101 when installed in the container 101. The reference numeral 274A represents the portion where the top surface portion 11 contacts the edge portion 103, and the reference numeral 274B represents the portion where the side wall portion 13 contacts the edge portion 103. This is the same for Figures 11 to 13 as well.

[0183] In the lid 10A of the second embodiment, the side wall portion 13 is formed in a ring shape along the outer peripheral end of the top surface portion 11, and the configurations of the small wall portion 14 and the overlapping portion 20 shown in the first embodiment are omitted. The side wall portion 13 is formed in a manner that tapers (the inner diameter of the cross-section becomes smaller (diameter reduction)) toward the lower side (toward the -Z direction) at the front end. However, regarding the point of setting the side wall portion 13 to a tapered shape at the front end, this also represents a preferred example as described in the first embodiment, and the shape of the side wall portion 13 is not limited thereto.

[0184] It is possible to form the top surface portion 11 and the side wall portion 13 from independent components and further bond the component forming the top surface portion 11 and the component forming the side wall portion 13, thereby specifically manufacturing the lid 10A of the second embodiment.

[0185] For example, regarding the formation example of the lid 10A of the second embodiment, as Figure 14 A of Figure 14 illustrated by B of, a top cover portion forming member 222 having a first portion 231 for forming the top surface portion 11 and a side wall portion forming member 223 for forming the side wall portion 13 are prepared. A joining margin 230 configured to be able to engage with the side wall portion forming member 223 is extended and provided at the outer end portion (outer edge end portion) of the first portion 231 of the top cover portion forming member 222 as a second portion 232. By bonding the joining margin 230 of the top cover portion forming member 222 to the upper end portion of the side wall portion forming member 223, the top cover portion forming member 222 and the side wall portion forming member 223 are joined, thereby forming the bent portion 12. At this time, the lid 10 is formed. In this case, as the blank, as Figure 14 A of and Figure 14As shown in B of [description], blanks (referred to as the first blank 251 and the second blank 252, respectively) for forming the top cover part forming member 222 and the side wall part forming member 223 can be used. The first blank 251 for forming the top cover part forming member 222 can use a sheet formed to conform to the shape of the joint margin 230 and the top surface part 11. Preferably, a through-hole part 17 and a gas-liquid separation material 42 are provided on the first blank 251. The second blank 252 is set to a shape corresponding to the shape of the side wall part 13. For example, when the side wall part 13 has a shape that tapers or expands in diameter toward the front end, a sheet formed in a fan shape (locally formed in a fan shape) can be used. By joining the edge parts 253, 253 at both ends of the second blank 252, the side wall part forming member 223 for forming the side wall part 13 can be obtained.

[0186] [2-2 Function and Effect]

[0187] Similar to the first embodiment, the cover body 10A according to the second embodiment can obtain a cover body that can suppress the leakage of the liquid constituting the mixed fluid from the through-hole part 17 and has excellent recyclability.

[0188] [3 The Third Embodiment]

[0189] [3-1 Configuration]

[0190] As shown in Figure 11 A of Figure 11 B of [[description]], the cover body 10B of the third embodiment is the same as the first embodiment in that it has a top surface part 11 and a side wall part 13 and can be fitted to the container 101. In addition, in the third embodiment, a through-hole part 17 and a gas-liquid separation material 42 are provided on the top surface part 11, but it can also be the same as the first embodiment and the second embodiment, so the description is omitted here. Figure 11 A of Figure 11 B of [[description]] are a perspective view and a cross-sectional view showing an example of the cover body of the third embodiment.

[0191] The cover body 10B of the third embodiment has a configuration in which a part of the side wall part 13 extends upward and downward from the top surface part 11. The side wall part 13 has an annular (including cylindrical) shape and has an upper wall 205 and a lower wall 206. The lower wall 206 is the part extending downward from the top surface part 11, and the upper wall 205 is constituted by the part of the side wall part 13 other than the lower wall 206. Figure 11 A of Figure 11 B of [[description]], in the example, the side wall part 13 is formed to taper toward the lower front end. In addition, Figure 11 A of Figure 11 B of [[description]], in the example, a through-hole part 17 is formed at a specified position on the top surface part 11, but this is only an example.

[0192] (Components forming the top cover portion and the side wall portion respectively)

[0193] In the third embodiment, as in the second embodiment, the top surface portion 11 and the side wall portion 13 are formed of independent components. The lid body 10B has, in the example of Figure 11 A of Figure 11 B of

[0194] (Top cover portion forming component)

[0195] The top cover portion forming component 222 has a first portion (the first portion 231 of the top cover portion forming component 222) corresponding to the top surface portion 11, and a second portion (the second portion 232 of the top cover portion forming component 222) extending from the outer peripheral end of the first portion 231. The second portion 232 becomes the joint margin 230 shown in the second embodiment. Figure 11 In the example of A of

[0196] (Side wall portion forming component)

[0197] The side wall portion forming component 223 is formed in a ring shape (including a cylindrical shape), and has a portion (upper forming portion) forming the upper wall 205 and a portion (lower forming portion) forming the lower wall 206. The upper forming portion has a portion (the first contact wall portion 233) that contacts at least the outer surface side of the joint margin 230 that becomes the second portion 232 of the top cover portion forming component 222.

[0198] Figure A of ​ In the example of B of ​ A of ​In the example of B, it is slightly separated from the first part 231. However, this is just one example. The lower end of the second contact wall portion 234 may also contact the upper surface side of the first part 231 of the top cover portion forming member 222.

[0199] ​ of A, ​ In the example of B, the lower wall 206 (lower forming portion) is a portion extending downward from the lower end of the first contact wall portion 233 as a base end ( ​ of A, ​ in B is an obliquely downward direction). The lower wall 206 (lower forming portion) is preferably, for example, located below the lower surface of the first part 231 of the top cover portion forming member 222 in the vertical direction.

[0200] (blank)

[0201] The cover 10B of the third embodiment can be formed by processing a blank. As the blank, a blank for forming the top cover portion forming member 222 and the side wall portion forming member 223 can be used (in the second embodiment, they are respectively referred to as the first blank and the second blank as described above).

[0202] The first blank for forming the top cover portion forming member 222 can use the same material as the first blank 251 described in the second embodiment, and a sheet material formed into a shape that further conforms the joining margin 230 to the shape of the top surface portion 11 can be used. The top cover portion forming member 222 is preferably formed by bending the first blank to form the first part 231 corresponding to the top surface portion 11 and the standing portion (the second part 232 that becomes the joining margin). That is, the second part 232 is preferably formed by bending the first blank upward at the position of the periphery of the first part 231 (the base end of the joining margin 230).

[0203] The second blank for forming the side wall portion forming member 223 can use the same blank as the second blank 252 described in the second embodiment, or a sheet material formed in a fan shape. By joining the edge portions of the second blank to form an annular body and folding back the upper end side portion of the annular body at a position corresponding to the continuous portion 235, the first contact wall portion 233, the second contact wall portion 234, and the continuous portion 235 can be formed, and an upper forming portion (a structural portion corresponding to the upper wall 205) can be formed, and a lower forming portion (a structural portion corresponding to the lower wall 206) can be formed. By forming the upper forming portion and the lower forming portion, the side wall portion forming member 223 is formed. In addition, at least in the first contact wall portion 233 and the second contact wall portion 234, they are bonded to the joining margin 230. ​In the example of B, the first contact wall portion 233, the second contact wall portion 234, and the continuous portion 235 are bonded to the bonding margin 230 to form a bonded portion.

[0204] In addition, when manufacturing the lid body 10B, it is preferable that the lid body 10B is joined to the top lid portion forming member 222 in the state of the above-described annular body formed from the second blank. That is, the lower end of the bonding margin 230 (the second portion 232) of the top lid portion forming member 222 is aligned with the boundary position (the boundary position between the upper wall 205 and the lower wall 206) of the lower forming portion and the upper forming portion in the inner peripheral surface of the annular body, and the bonding margin 230 is faced to the inner peripheral surface of the annular body. Then, as described above, the upper end side portion of the annular body at the position corresponding to the continuous portion 235 in the annular body is folded inward, thereby covering the bonding margin 230 from the upper end side. And the bonding margin 230 is joined to the annular body that becomes the side wall portion forming member 223 so as to be clamped by the first contact wall portion 233 and the second contact wall portion 234. Thus, the side wall portion forming member 223 is formed, and the lid body 10B is obtained.

[0205] [3-2 Function and Effect]

[0206] According to the lid body 10B of the third embodiment, similarly to the first embodiment, a lid body is obtained that can suppress leakage of the liquid constituting the mixed fluid from the through portion 17 and has excellent recyclability.

[0207] [4 Fourth Embodiment]

[0208] [4-1 Configuration]

[0209] As ​ in A of ​ and B of ​ in A of ​ and B of

[0210] The lid body 10C of the fourth embodiment has a configuration in which a part of the side wall portion 13 extends upward and downward of the top surface portion 11. The side wall portion 13 has an annular (including cylindrical) shape and has an upper wall 205 and a lower wall 206. The lower wall 206 is a portion extending downward of the top surface portion 11, and the upper wall 205 is formed of the portion of the side wall portion 13 other than the lower wall 206. ​ in A of ​In the example of B, the side wall portion 13 is formed to taper toward the lower front end. Further, ​ of A, ​ In the example of B, a through portion 17 is formed at a specified position of the top face portion 11, but this is just one example.

[0211] (Parts that form the top cover portion and the side wall portion respectively)

[0212] In the fourth embodiment, as shown in the second and third embodiments, the top face portion 11 and the side wall portion 13 are formed of independent parts. The lid body 10C has ​ of A, ​ In the example of B, it has a top cover portion forming part 222 and a side wall portion forming part 223 as the above-mentioned independent parts, and has a joint portion for joining the top cover portion forming part 222 and the side wall portion forming part 223.

[0213] (Top cover portion forming part)

[0214] The top cover portion forming part 222 has a first part (the first part 231 of the top cover portion forming part 222) corresponding to the top face portion 11, and a second part (the second part 232 of the top cover portion forming part 222) extending from the outer peripheral end of the first part 231. The second part 232 becomes the joint margin 230 shown in the second embodiment. ​ In the example of A, the second part of the top cover portion forming part 222 is a part (hanging portion) extending obliquely downward or vertically downward from the outer peripheral end of the first part 231, and the second part 232 becomes a part of the side wall portion 13 in a state where the second part 232 is joined to the side wall portion forming part 223.

[0215] (Side wall portion forming part)

[0216] The side wall portion forming part 223 is formed in a ring shape (including a cylindrical shape), and has a part (upper forming portion) forming the upper wall 205 and a part (lower forming portion) forming the lower wall 206. The lower forming portion has a part (lower first contact wall portion 237) that contacts at least the outer surface side with respect to the joint margin 230 that is the second part 232 of the top cover portion forming part 222.

[0217] ​ of A, ​In the example of B, the lower forming portion has a lower first contact wall portion 237, a portion (lower second contact wall portion 238) that contacts the joining margin 230 of the second portion 232 of the top cover portion forming member 222 on the inner surface side, and a lower end side continuous portion 239 that further connects the lower first contact wall portion 237 and the lower second contact wall portion 238. The lower end side continuous portion 239 covers the lower end surface of the joining margin 230 of the second portion 232 of the top cover portion forming member 222. The upper end of the lower second contact wall portion 238 is located on the lower surface (opposite surface 73) side of the first portion 231 of the top cover portion forming member 222. ​ of A, ​ In the example of B, it is preferably separated from the first portion 231. Preferably, the edge portion 103 of the container 101 (for example, a part of the outer peripheral surface of the curled portion) can enter between the first portion and the upper end of the lower second contact wall portion 238.

[0218] ​ of A, ​ In the example of B, the upper wall 205 (upper forming portion) is a portion that extends upward from the upper end of the lower first contact wall portion 237 in the upward direction ( ​ In B, the obliquely upward direction). The upper wall 205 (upper forming portion) is preferably, for example, located above the upper surface of the first portion 231 of the top cover portion forming member 222 in the vertical direction. As ​ of A, ​ As shown in the example of B, the upper forming portion preferably has a curled portion (side wall upper end curled portion 236) formed on its upper end side. In this case, it is possible to prevent the end face of the blank (the second blank for forming the side wall portion forming member 223) from being exposed at the upper end of the upper forming portion. Even when the user touches the end face of the blank with the mouth to ingest the contents in the container 101, it is possible to suppress the discomfort caused by the user's contact between the mouth and the end face of the blank. In addition, by forming the side wall upper end curled portion 236, it becomes difficult for the liquid to contact the portion of the side wall portion 13 corresponding to the end face of the blank.

[0219] (blank)

[0220] The lid 10C of the fourth embodiment can be formed by processing a blank. As the blank, a blank for forming the top cover portion forming member 222 and the side wall portion forming member 223 can be used (in the second embodiment, they are respectively referred to as the first blank and the second blank as described above). At least one blank selected from the group consisting of the first blank and the second blank can be formed in the same manner as the above-described blank as in the second embodiment.

[0221] The first blank for forming the top cover part forming member 222 may use the same blank as the first blank 251 described in the second embodiment, or may use a sheet material formed into a shape that further conforms to the shape of the top surface part 11. The top cover part forming member 222 is preferably formed by bending the first blank to form a first part 231 corresponding to the top surface part 11 and a second part 232 that becomes the joint margin 230. That is, the second part 232 is preferably formed by bending the first blank downward at the position of the periphery of the first part 231.

[0222] The second blank for forming the side wall part forming member 223 may use the same blank as the second blank 252 described in the second embodiment, and may use a sheet material formed in a fan shape. The edge parts of the second blank are joined to form an annular body. And, by folding back the part on the lower end side of the annular body at the position corresponding to the lower end side continuous part 239, the lower first contact wall part 237, the lower second contact wall part 238, and the lower end side continuous part 239 can be formed, and the lower forming part (lower wall 206) can be formed, and the upper forming part (upper wall 205) can be formed. By forming the lower forming part and the upper forming part, the side wall part forming member 223 is formed.

[0223] In addition, when manufacturing the cover body 10C, it is preferable to perform the joining with the top cover part forming member 222 in the state of the above-mentioned annular body formed from the second blank. The upper end of the joint margin 230 (second part 232) of the top cover part forming member 222 is positioned at the boundary position between the lower forming part and the upper forming part in the inner peripheral surface of the annular body (the boundary position between the upper wall 205 and the lower wall 206), and the joint margin 230 faces the inner peripheral surface of the annular body. And, by folding back the part on the lower end side of the annular body at the position corresponding to the lower end side continuous part 239 in the above-mentioned manner, the joint margin 230 is covered from the lower end side. And, the joint margin 230 is joined (bonded) to the lower forming part (the annular body forming the side wall part forming member 223) in such a manner as to be clamped by the lower first contact wall part 237 and the lower second contact wall part 238. Thus, the side wall part forming member 223 is formed, and the cover body 10C is obtained.

[0224] [4-2 Functions and Effects]

[0225] According to the cover body 10C of the fourth embodiment, similarly to the first embodiment, a cover body can be obtained that can suppress the leakage of the liquid constituting the mixed fluid from the through-hole part 17 and has excellent recyclability.

[0226] In the state of the lid bodies 10, 10A, 10B, 10C of the above-described first to fourth embodiments, the contact portion 151 between the lid body 10 and the container can be formed by fitting with respect to the container 101. The lid body 10 applicable to the present invention is not limited to such a lid body, and as described in the fifth embodiment below, the contact portion 151 can be formed by joining the lid body 1 with respect to the container 101. In this case, the contact portion 151 is a portion where the container 101 and the lid body 10 are adhesively bonded (including bonding), and in order to separate the lid body 10 from the container 101, the lid body 10 and the container 101 are peeled off through the contact portion 151.

[0227] [5th Fifth Embodiment]

[0228] [5-1 Configuration]

[0229] As ​ from A to ​ shown in C of, the lid body 10D of the fifth embodiment has a main body 40. The main body 40 is formed with a top surface portion 11 as described in the first embodiment except that the bent portion 12 and the side wall portion 13 are omitted. The lid body 10D of the fifth embodiment is joined (adhesively bonded) to the container 101, for example, by heat sealing in the state of the container 150 with a lid body.

[0230] The lid body 10 has a joining region corresponding portion 95A. In addition, as ​ shown in A of, the lid body 10 has a lid region corresponding portion 95B and an outer region corresponding portion 95C. The lid region corresponding portion 95B is constituted by a portion covering the opening portion 102. The outer region corresponding portion 95C is constituted by a portion located outside compared with the lid region corresponding portion 95B.

[0231] (Joining Region Corresponding Portion)

[0232] The joining region corresponding portion 95A is a portion in the lid body 10D corresponding to the region joined to the container 101 along the edge portion 103 of the container 101. That is, the joining region corresponding portion 95A is a portion of the lid body 10D corresponding to the contact region R (in the fifth embodiment, the region facing the edge portion 103 of the container 101 and joined to the container 101). In the container 150 with a lid body, the joining region corresponding portion 95A is a portion in the lid body 10D where the contact portion 151 between the lid body 10D and the container 101 is formed. Specifically, when the lid body 10D is viewed from above ( ​ in the examples from A to ​ C of, in the case where the Z-axis direction (vertical direction) is the line-of-sight direction), the portion forming the contact region R is defined as the joining region corresponding portion 95A. The joining region corresponding portion 95A is usually formed in a ring shape as ​ shown in A of. In particular, as​ As shown in FIG. A of ​ , when the edge portion 103 of the container 101 is formed in a substantially circular shape, the contact area R becomes circular, and the joint area corresponding portion 95A also becomes substantially circular when viewed from above the lid 10. The outer edge of the joint area corresponding portion 95A is determined according to the position of the outer edge of the contact area R. The outer edge of the joint area corresponding portion 95A may be located at the outer peripheral edge of the lid 10 (in this case, the joint area corresponding portion 95A coincides with the outer area corresponding portion 95C), or may be located inside the outer peripheral edge of the lid 10 as shown in the example of FIG. A of ​ . When the contact area R between the lid 10 and the container 101 is not continuously formed, the portion sandwiched by the adjacent contact areas R and facing the edge portion 103 is also included in the later-described rear joint area corresponding portion 95A. ​ As shown in the example of FIG. A of ​ , when the contact area R between the lid 10 and the container 101 is not continuously formed, the portion sandwiched by the adjacent contact areas R and facing the edge portion 103 is also included in the later-described rear joint area corresponding portion 95A.

[0233] (Lid area corresponding portion)

[0234] The lid area corresponding portion 95B is composed of the portion covering the opening 102. In the example of FIG. A of ​ , the lid area corresponding portion 95B is the portion inside the joint area corresponding portion 95A in the lid 10. The lid area corresponding portion 95B becomes the portion covering the opening 102 in the container 150 with a lid. In addition, the portion covering the opening 102 refers to the portion covering at least a part of the opening 102, including the case where there is a locally openable portion such as the insertion port 16 as described later. ​ In the example of FIG. A of ​ , the lid area corresponding portion 95B is the portion inside the joint area corresponding portion 95A in the lid 10. The lid area corresponding portion 95B becomes the portion covering the opening 102 in the container 150 with a lid. In addition, the portion covering the opening 102 refers to the portion covering at least a part of the opening 102, including the case where there is a locally openable portion such as the insertion port 16 as described later.

[0235] (Outer area corresponding portion)

[0236] In addition, as shown in the example of FIG. A of ​ , the portion outside the lid area corresponding portion 95B of the lid 10 is the outer area corresponding portion 95C, which becomes the same portion as the joint area corresponding portion 95A or a portion including the contact area R. ​ As shown in the example of FIG. A of ​ , the portion outside the lid area corresponding portion 95B of the lid 10 is the outer area corresponding portion 95C, which becomes the same portion as the joint area corresponding portion 95A or a portion including the contact area R.

[0237] In the main body 40 of the lid 10, the lid area corresponding portion 95B has a through portion 17 at a position inside the outer peripheral edge, that is, the circumferential end edge 74, of the lid area corresponding portion 95B. However, this does not prohibit a part of the through portion 17 from being formed outside the lid area corresponding portion 95B. The configuration of the through portion is the same as that of the first embodiment, and thus the detailed description is omitted.

[0238] ​ From FIG. A to ​In the main body 40 (top face portion 11) of the lid body 10 as shown in the example of C, a gas-liquid separation material 42 is disposed so as to face the corresponding portion 95B of the lid region. When the direction from the opposite face 73 side to the exposed face 72 of the lid body 10 is set as the line-of-sight direction, in the first to fourth embodiments, the gas-liquid separation material 42 is disposed so as to cover the through portion 17. The gas-liquid separation material 42 and the top face portion 11 are fixed by a coating agent 48. The gas-liquid separation material 42, the top face portion 11, the coating agent 48, and the through portion 17 are the same as those described in the first embodiment, and thus detailed description thereof is omitted.

[0239] [5 - Function and Effect]

[0240] According to the lid body 10D of the fifth embodiment, similarly to the first embodiment, a lid body can be obtained that can suppress leakage of the liquid constituting the mixed fluid from the through portion 17 and has excellent recyclability.

[0241] [6. Application Examples]

[0242] (Application Example 1)

[0243] When the lid bodies of the first to fourth embodiments are used, the lid bodies can be used for the container 150 with a lid as shown in ​ A of ​ B of ​ A of ​ shows an example of a diagram showing the lid body 10 of the first embodiment being attached to the edge portion 103 of the outer periphery of the opening portion 102 formed at the upper end of the container 101. In this example, an example of engaging the lid body 10 with the edge portion 103 is shown. ​ B of ​ is a cross-sectional view schematically showing the state of the longitudinal section along the line C - C in A of ​ A of ​ B of

[0244] (Container with a Lid)

[0245] The container 150 with a lid has a contact portion 151 that contacts the container 101, and the region of the lid body 10 that forms the contact portion 151 becomes the contact region R. The lid body 10 can be attached by fitting with the container 101. In the description of (Application Example 1), the case where the lid body 10 of the first embodiment is used for the container 150 with a lid is described as an example.

[0246] The container 101 has: a container body 110 having a cylindrical side wall 104 and a bottom 107 that thicken in the upward direction (thin at the front end in the downward direction), and forming a space portion 105 inside; and an opening 102 that opens at the upper end of the container body 110 (the upper end of the side wall 104). Although not shown, the opening 102 of the container 101 is formed in a circular shape. However, the container 101 shown here is an example, and the structure of the container 101 is not limited. For example, the container 101 may also form the opening 102 in a rectangular shape. The container 101 only needs to be able to cover the opening 102 with the lid 1. However, in such a case, it is preferable to set the shape of the lid 10 to a shape adapted to the shape of the container 101 (for example, a rectangular shape).

[0247] In ​ In the container 101 shown as A, B, etc. of

[0248] The articles stored inside the container 101 (space portion 105) are not particularly limited, and examples can be given such as liquid articles, articles containing solid and liquid, articles in which gas is mixed or dissolved in liquid (such as carbonated water), or combinations thereof, etc. However, when a mixed fluid containing gas and liquid is used as the content (or included in the content), the lid of the present invention can particularly exert its effect. That is, when a fluid such as liquid is used as the content, sometimes the mixed fluid may spray out from the opening of the container, causing the problem of leakage of the liquid constituting the mixed fluid from the container.

[0249] In the container 150 with a lid, a special structure for separating gas and liquid is provided, thereby suppressing the problem of leakage of the liquid constituting the mixed fluid from the container 101. Moreover, the special structure for separating gas and liquid is composed of such a paper material of the gas-liquid separation material 42, and the top surface portion 11 is also formed of a paper material, thereby improving the recyclability of the lid.

[0250] (Application Example 2)

[0251] When the lid 10 of the fifth embodiment is used as the lid 10D, the container 150 with a lid can join the lid 10 and the container 101 in the area (contact area R) where the contact portion 151 of the lid 10 is formed, thereby installing the lid 10D on the container 101. As the joining method, ultrasonic welding, heat sealing, etc. can be used. Usually, a resin layer is mostly formed on the edge portion 103 of the container 101. In this case, between the lid 10 and the container 101, the lid 10D and the container 101 can be joined by methods such as ultrasonic welding and heat sealing without particularly sandwiching a substance that becomes an adhesive. However, this does not prohibit the contact portion 151 where the lid 10D contacts the container 101 from being formed by bonding using a substance that becomes an adhesive (such as starch paste, etc.) between the lid 10D and the container 101.

[0252] (Application Example 3)

[0253] The lid 10 of the present invention can also be configured as a combination with the container 101 having the opening 102.

[0254] [Examples of Filter Components]

[0255] Regarding the filter component for separating the liquid as the container content from other components, there are filter papers, etc. as filter components using paper. However, filter papers, etc. separate liquids from solids and usually do not target the "mixed fluid of gas and liquid" that is intended to be ejected to the outside. The gas-liquid separation material 42 used in the lid 10 of the present invention can be used as a filter component for a mixed fluid of gas and liquid. Such a filter component can roughly separate gas from the mixed fluid of gas and liquid.

[0256] As described so far, the present invention can be applied to such various modes. In addition, it can also be applied to the method of providing components for stores and packaging materials other than the above. Above, the lid of the present invention has been described in detail. However, the above are only examples of the lid of the present invention and are not limited to these. Therefore, it can be appropriately changed without departing from the gist of the present invention. In addition, the configurations of the inventions in the above examples can be used independently of the configurations of the inventions in each example, or the configurations of the inventions in each example can be appropriately combined and applied.

[0257] Next, the form A as the form of the lid will be further described. Form A refers to the form of a lid having a structure in which the gas-liquid separation material 42 is omitted from the lid 10D of the fifth embodiment.

[0258] Regarding the example of the lid 10D of the fifth embodiment above ( ​ of A to ​As shown in Example C, the gas-liquid separation material 42 is preferably not disposed in the joint region corresponding portion 95A in the top surface portion 11. As shown in the first embodiment, the top surface portion 11 preferably has a paper base material 41 made of a paper raw material, and it is preferable to avoid forming a coating layer on the paper base material 41. When the top surface portion 11 is made of a paper raw material and the formation of the coating layer is avoided, at least the joint region corresponding portion 95A in the top surface portion 11 is in a state where the fibers constituting the paper raw material are exposed on the surface. Also as described in Application Example 2 above, for the edge portion 103 of the container 101, a resin layer formed in a normal manner is used, and the lid body 10D and the container 101 are bonded by various bonding methods such as a heat sealing method and an ultrasonic welding method. In this case, if the fibers constituting the paper raw material are exposed on the surface at least at the joint region corresponding portion 95A in the top surface portion 11, the influence of the reduction in the adhesiveness between the lid body 10D and the container 101 caused by the type of the resin of the resin layer constituting the container 101 can be suppressed, and at the same time, the bonding between the lid body 10D and the container 101 can be achieved. In addition, if the fibers constituting the paper raw material are exposed on the surface in the joint region corresponding portion 95A, the bonding between the lid body 10D and the container 101 can be made firm. And this effect can be achieved even when the gas-liquid separation material 42 is omitted from the lid body 10D. Moreover, the lid body in the case of omitting the gas-liquid separation material 42 from the lid body 10D can further improve the recyclability, that is, such a lid body can obtain the same effect as the first embodiment and the like from the viewpoint of recyclability. In addition, by allowing the liquid to be absorbed and / or adhered in the paper raw material constituting the lid body, the leakage of the liquid as the content from the container with the lid body can be somewhat suppressed.

[0259] Therefore, the form of the lid body having a structure in which the gas-liquid separation material 42 is omitted from the lid body 10D of the fifth embodiment as described above is referred to as Form A. As an example of Form A, Forms A1 and A2 will be described below. In this specification, when not distinguishing between the two forms of Form A1 and Form A2, the general term Form A is used. Regarding the following description of Form A, it will be described in the order of Form A1, Form A2, and application examples of Form A.

[0260] [8. Form of the lid body (Form A1)]

[0261] [8-1 Constitution]

[0262] As ​ of A to ​As shown in B of FIG. [0], the lid 300A of Form A1 has a structure obtained by omitting the gas-liquid separation material 42 from the lid 10D of the fifth embodiment. That is, the lid 300A of Form A1 may have the same configuration as that of the fifth embodiment for other components obtained by omitting the gas-liquid separation material 42 from the lid 10D. The lid 300A of Form A1 has a main body 290. The main body 290 may have the same structure as the main body 40 in the fifth embodiment except for the point of omitting the gas-liquid separation material 42. In Form A1, the main body 290 has a top surface portion 291, and the top surface portion 291 has a paper base material 41 in the same manner as the top surface portion 11 described in the fifth embodiment. The lid 300A of Form A1 is joined (adhered) to the container 101, for example, by heat sealing or the like in the state of the container 150 with the lid. That is, the lid 300A of Form A1 has a main body 290, the main body 290 has a paper base material 41 having a plurality of paper fibers as fibers, and the lid 300A is formed so as to be able to be joined (able to contact via the resin coating) to the container 101 having a resin layer (resin coating) on the surface. The container 101 has an opening 102 formed at the upper end and a peripheral edge portion 103 forming the outer periphery of the opening 102. The main body 290 is configured to have a joining region corresponding portion 295A corresponding to a joining region defined as a region where the container is joined along the peripheral edge portion 103 of the container 101, have a portion where the surface of the paper base material 41 is exposed, and be able to adhere the resin coating (the resin coating of the container 101) at least on at least a part of the joining region corresponding portion 5A (the portion where the surface of the paper base material 41 is exposed).

[0263] In addition, in the example of the figure, the configuration of the through portion is omitted in the main body 290, but regarding the lid 300A of Form A1, it is not limited to the case where the configuration of the through portion is omitted. Further, ​ in A of FIG. [5], ​ reference numerals 298 and 299 are described in B of FIG. [7]. Among them, reference numeral 298 represents the exposed surface, and reference numeral 299 represents the opposite surface. The exposed surface 298 is defined in the same manner as the exposed surface 72 shown in the first to fifth embodiments, and the opposite surface 299 is defined in the same manner as the opposite surface 73 shown in the first to fifth embodiments. Further, ​ in A of FIG. [9], ​ reference numeral RN is described in B of FIG.

[11] . The reference numeral RN represents the joining region. The joining region RN can be defined by the same region as the contact region R shown in the fifth embodiment. ​ in A of FIG.

[13] , ​ the reference numeral CT shown in B of FIG.

[15] is the center (central position) of the lid 300A.

[0264] As described above, the main body 290 of the lid 300A in the form A1 preferably has the paper base material 41 described in the first embodiment or the like, that is, has a paper base material 41 made of a paper raw material. In the lid 300A of the form A1, it is preferable to avoid the formation of a coating layer on the paper base material 41 used to form the main body 290. The main body 290 is preferably made of the paper base material 41 and the formation of a coating layer is avoided. As described above, when the main body 290 is made of the paper base material 41 and the formation of a coating layer is avoided, at least the joint area corresponding part 295A in the top surface part 291 of the main body 290 is in a state where the fibers constituting the paper raw material are exposed on the surface. In addition, ​ of A, ​ in the example of B, not only in the joint area corresponding part 295A, but also in the lid area corresponding part 295B, the fibers constituting the paper raw material are exposed on the surface.

[0265] ​ of A, ​ in the example of B, in addition to the joint area corresponding part 295A, the lid area corresponding part 295B also exists in the main body 290, and the lid area corresponding part 295B is defined in the same manner as the joint area corresponding part 95A and the lid area corresponding part 95B described in the fifth embodiment. Therefore, in the description of the form A1, the description of the joint area corresponding part 295A and the lid area corresponding part 295B is omitted. In addition, ​ of A, ​ in B, an outer area corresponding part 295C is shown. The outer area corresponding part 295C is defined in the same manner as the outer area corresponding part 95C described in the fifth embodiment. Therefore, in the description of the form A1, the description of the outer area corresponding part 295C is omitted.

[0266] (concavities and convexities)

[0267] In the part of the top surface part 291 of the main body 290 where the fibers constituting the paper raw material are exposed on the surface, as ​ of A, ​ shown in B of, a plurality of fine concavities and convexities 292 are formed on the surface of the top surface part 291. In the paper base material 41 used to form the main body 290, in a state where the fibers constituting the paper base material 41 have various directions and shapes (curved shapes and bent shapes), these fibers overlap. Therefore, a difference occurs in the overlapping state of the fibers according to the position of the surface of the main body 290. The fine concavities and convexities 292 are formed as parts that accompany the formation of a relatively protruding part 292A and a relatively recessed part 292B due to the difference according to the position of the surface of the main body 290. That is, the concavities and convexities 292 are composed of a combination of the part 292A and the part 292B. In addition, ​In A, the regions corresponding to part 292A and part 292B are represented by different patterns respectively, and the part defined as the approximate boundary between part 292A and part 292B (the middle part between the protruding end of part 292A and the recessed end of part 292B (the middle part based on the thickness direction of the main body 290)) is represented by a solid line. ​ of A, ​ of B respectively represent the enlarged states of the region XR1 surrounded by the dashed line in A of ​ and the region XR2 surrounded by the dashed line in B of ​ , but the magnification ratios are not unified.

[0268] [Function and effect of 8-2]

[0269] When the lid is applied to a container with a lid, a resin layer is usually formed on the inner surface side of the container body. By setting the first blank for forming the side wall as a cylindrical body formed in a cylindrical shape and arranging the second blank for forming the bottom at a specified position on the inner circumferential surface side of the cylindrical body, the container body can be formed. When fixing the side ends in order to overlap the two side ends of the first blank and fix the shape of the cylindrical body formed in a cylindrical shape, a resin layer (resin coating) is sometimes used. In this case, since the resin coating is used to fix two different parts in one component of the first blank, the necessity of considering the adhesiveness of different components is not recognized. When the container and the lid are formed independently, the adhesion between the container and the lid is equivalent to the adhesion of different components, so the adhesiveness needs to be considered. In the conventional lid, it is necessary to consider providing a resin layer on the lid and bonding the container and the lid. In this case, the following problem occurs, that is, the adhesiveness is high for specific containers and lids, but the adhesiveness decreases for other containers and lids.

[0270] In contrast, for the lid 300A according to the form A1, by applying the resin layer formed usually to the edge part 103 of the container 101 and using various bonding methods such as heat sealing method and ultrasonic welding method, as ​ of A, ​ of B shows, the state of bonding the container 101 can be formed more reliably at the corresponding part 295A of the joint area. When the opposite surface side of the container 101 in the corresponding part 295A of the joint area is coated with a resin layer, it is necessary to consider the influence of the decrease in the adhesiveness between the lid 300A and the container 101 due to the type of resin of the resin layer constituting the container 101, but in the corresponding part 295A, the fibers of the paper raw material are in a state of being exposed on the surface, so the influence of the decrease in the adhesiveness between the lid 300A and the container 101 can be suppressed. In addition, ​ of B also shows in cooperation with the enlarged state of the part of the region XRA surrounded by the dashed line.

[0271] In ​ example of the lid 300A of the form A1 shown in A of ​ and B of ​ A of ​ and B of ​ A of ​ and B of ​ A of ​ and B of

[0272] Next, the form A2 will be described. Specifically, the first to fifth form examples related to the form A2 will be given for explanation.

[0273] [Form of lid (Form A2)]

[0274] [9-1. First form example related to form A2]

[0275] [(1) Structure]

[0276] The lid 300B of the form A2 has a lid main body (main body 303). The main body 303 is formed so as to be able to be joined to the container main body 410 of the container 401 having the container main body 410 via an adhesive substance 302. As ​ shown in A of ​ and B of ​ shown in A of ​ and B of ​ from A of ​ to B of ​A of [the figure] is a top view showing an embodiment of the lid body 300B. ​ B of [the figure] is showing Figure 23 A cross-sectional view showing the state of the longitudinal section along the line A-A in A of [the figure]. In addition, as the container 401, it is more preferable to use a container having flexibility at the edge portion 403 of the opening portion 402. However, this does not prohibit the container 401 from being a container made of metal or the like with little or almost no flexibility.

[0277] The bonding region RA is in Figure 23 from A to Figure 23 In the example of B of [the figure], it corresponds to a region formed approximately in a ring shape along the opening portion 402 in a shape corresponding to the opening portion 402 of the container 401. The bonding region RA can be defined as the same region as the contact region R in the above-described fifth embodiment and form A1 or the like.

[0278] In the description of form A2, similar to the above-described first embodiment and form A1 or the like, a state in which the main body 303 and the container main body 410 are joined via an adhesive substance 302 is assumed. In this case, the surface of the main body 303 that becomes the opposite surface to the container 401 is referred to as the opposite surface 373 (the surface facing the side opposite to the container 401 in the state of the container 450 with a lid), and the surface facing away from the opposite surface 373 is referred to as the exposed surface 372 (the surface exposed to the outside in the state of the container 450 with a lid).

[0279] In addition to the main body 303, for other components such as the lid body 300B and the lid region corresponding portion 305B, the surface facing the same direction as the exposed surface 372 is sometimes referred to as the exposed surface, and the direction facing the same direction as the opposite surface 373 is referred to as the opposite surface.

[0280] (Main body)

[0281] The main body 303 has a paper base material 304, and the paper base material 304 has a plurality of paper fibers 306A as fibers 306. Having the paper base material 304 means including the paper base material 304 or being formed of the paper base material 304. From the viewpoint of reliably exposing the paper fibers 306A on its surface, the main body 303 is preferably formed of the paper base material 304. For example, a blank obtained by molding (processing) a sheet made of the paper base material 304 into a specified shape can be used to obtain the main body 303.

[0282] (Fiber)

[0283] In addition, the fiber 306 refers to a structure of a degree such that when the paper base material 304 is observed from above and observed with an electron microscope or an optical microscope at a magnification of about 50 times, it can be recognized as a substance having an elongated shape.

[0284] (Paper base material)

[0285] The paper base material 304 may be configured in the same manner as the paper base materials 41 in the above-described first embodiment and form A1, etc., but preferably, it is a sheet having a plurality of paper fibers 306A as the fibers 306. The paper fibers 306A represent fibers formed from pulp. "Pulp" includes pulp fibers and fibers (such as recycled fibers) made from pulp as a raw material. The paper base material 304 may be a material including non-pulp natural fibers, synthetic fibers, recycled fibers, etc. in addition to a material composed only of paper fibers, but preferably, it includes 50% by mass or more of paper fibers, more preferably, 70% by mass or more, still more preferably, 80% by mass or more, and particularly preferably, 100% by mass of paper fibers. In addition to paper fibers, the paper base material can also use woody materials such as non-woven fabrics and wood foils, and can also use composite materials with materials such as aluminum foils. However, in the case of using a composite material, as a whole of the composite material, it is preferably contains 50% by mass or more of paper fibers, and particularly preferably, contains 80% by mass or more of paper fibers. The higher the paper fiber content, the easier the paper base material 304 is to biodegrade, and thus it is preferred.

[0286] The main body 303 and the paper base material 304 preferably do not contain various resins, but it is not completely prohibited to contain various resins. However, in the case where the main body 303 and the paper base material 304 contain various resins, from the viewpoint of reducing the environmental burden, the mass ratio to the total mass of the lid body 300B is preferably less than 1% by mass, and more preferably, 0.8% by mass or less. In addition, even in the case where the main body 303 and the paper base material 304 contain various resins, it is also preferable to select a biodegradable resin with fewer environmental pollution problems among the various resins. As the biodegradable resin, it was also described in the description of the lid body 10 in the above-described first embodiment. However, for example, it can be listed: microbial production type biodegradable resins such as polyhydroxyalkanoates (PHA) or PHA-based copolymers; natural product type biodegradable resins such as cellulose derivatives such as cellulose acetate or starch-based resins mainly made from starch such as corn starch; lactic acid-based resins such as polylactic acid (PLA), polylactic acid / polycaprolactone copolymer, polylactic acid / polyether copolymer, succinic acid-based resins such as polybutylene succinate (PBS), polybutylene adipate succinate (PBSA), polyethylene terephthalate succinate glycol (PETS), polycaprolactone, polyvinyl alcohol (PVA) and other chemically synthesized biodegradable resins, etc. In addition, there are also polyglycolic acid (PGA), polybutylene adipate / terephthalate, biodegradable polyolefins (product name: Biorecover, product name: Cra Drop, etc.).

[0287] In the lid body 300B, the main body 303 has: a joint area corresponding part 305A corresponding to a joint area RA defined as an area where the lid body is joined to the container 101 along the edge part 103 of the container 101; and a lid area corresponding part 305B constituted by a part of the joint area corresponding part 305A located on the inner side ( Figure 23 in the direction toward the central position (center CT)). As Figure 23 shown, the main body 303 may also have an outer area corresponding part 305C defined as a part outside the lid area corresponding part 305B. The joint area corresponding part 305A, the lid area corresponding part 305B, and the outer area corresponding part 305C can be defined as parts similar to the respective joint area corresponding part 95A, lid area corresponding part 95B, and outer area corresponding part 95C of the above-described fifth embodiment and form A1 as described below.

[0288] (Joint area corresponding part)

[0289] The joint area corresponding part 305A is a part in the lid body 300B corresponding to the area where the lid body is joined to the container 401 along the edge part 403 of the container 401 as described above. That is, the joint area corresponding part 305A is a part of the lid body 300B corresponding to the joint area RA (the area facing the edge part 403 of the container 401 and joined to the container 401). The joint area corresponding part 305A is a part in the lid body 300B that forms the joint part 451 between the lid body 300B and the container 401 in the container 150 with a lid. Specifically, when viewed from above the lid body 300B (in Figure 23 the example, with the Z-axis direction (vertical direction) as the line-of-sight direction), the part forming the joint area RA is defined as the joint area corresponding part 305A. The joint area corresponding part 305A is usually formed in a ring shape as Figure 23 shown. In particular, as Figure 23 shown, when the edge part 403 of the container 401 is formed in a substantially circular ring shape, the joint area RA becomes a circular ring shape, and the joint area corresponding part 305A also becomes a substantially circular ring shape when viewed from above the lid body 300B. The outer edge of the joint area corresponding part 305A is determined according to the position of the outer edge of the joint area RA. The outer edge of the joint area corresponding part 305A may be located at the outer peripheral edge of the lid body 300B (in this case, the joint area corresponding part 305A coincides with the outer area corresponding part 305C), or may be located inside the outer peripheral edge of the lid body 300B as in the Figure 23 example shown. When the joint area RA between the lid body 300B and the container 401 is not continuously formed, the part sandwiched by adjacent joint areas RA and facing the edge part 403 may also be included in the joint area corresponding part 305A described later.

[0290] (Cover area corresponding part)

[0291] The cover area corresponding part 305B is the part that constitutes the part covering the opening 402. The cover area corresponding part 305B becomes the part inside the cover body 300B compared with the joint area corresponding part 305A in the example of A in Figure 23 . The cover area corresponding part 305B becomes the part covering the opening 402 in the container 450 with a cover body. In addition, the part covering the opening 402 means the part covering at least a part of the opening 402, and includes the case having a locally openable part such as the insertion port 319 as described later.

[0292] (Outer area corresponding part)

[0293] In addition, as shown in the example of A in Figure 23 , the part outside the cover area corresponding part 305B of the cover body 300B is the outer area corresponding part 305C, which becomes the same part as the joint area corresponding part 305A or the part including the joint area RA.

[0294] (Receiving structure)

[0295] Since the paper base material 304 has a structure formed by overlapping fibers 306, it sometimes has a fine concavo-convex structure 307 on its surface as shown in Figure 24 A of. In the paper base material 304, a receiving structure 308 is provided in at least a part of the concavo-convex structure 307. The receiving structure 308 can make the adhesive 302 enter the exposed surface 372 side rather than the fibers 306 (fibers exposed on the opposite surface 373 side) arranged on the surface of the paper base material 304 in a state where the main body 303 is joined to the container body 410 via the adhesive 302.

[0296] As the receiving structure 308, an overlapping structure 309 can be cited. A receiving structure 308 such as the overlapping structure 309 can be formed by controlling the density, basis weight, and entanglement strength of the fibers 306 constituting the paper base material 304 during the manufacture of the paper base material 304. In addition, a receiving structure 308 such as the overlapping structure 309 can also be formed by performing a treatment (roughening treatment) to slightly roughen the surface of the paper base material 304 (especially, the surface on the opposite surface 373 side).

[0297] (Overlapping structure)

[0298] The paper base material 304 may also have an overlapping structure 309 (an overlapping structure with a non-closely contacting portion of fibers), and the overlapping structure 309 is defined as a structure in which the fibers 306 overlap in such a manner that the adhesive substance 302 can enter toward the exposed surface 372 side compared to the fibers 306 disposed on the surface of the paper base material 304 in a state where the main body 303 is joined to the container main body 410 via the adhesive substance 302 (a structure in which at least a part of the fibers 306 overlaps when viewed from above the lid body 300B). The overlapping structure 309 is formed, for example, at the crossing portion of the fibers 306, 306 that cross in a state having a gap as shown in C of Figure 24 or formed at a portion where the fibers 306, 306 that are in partial contact with each other gradually separate as shown in the example of B of Figure 24 .

[0299] In the lid body 300B, as shown in B of Figure 24 , at least a part of at least a part of the surface of the overlapping structure 309 of the paper base material 304 is exposed on the side of the opposite surface 373 in the corresponding portion 305A of the joining region.

[0300] (Distribution of the receiving structure)

[0301] In the opposite surface 373, the receiving structure 308 is not limited to the case where it is concentrated in a part of the corresponding portion 305A of the joining region as shown in C of Figure 29 , and may exist in substantially the entire region of the region of the corresponding portion 305A of the joining region as shown in A of Figure 29 (it may be dispersed in the entire surface region of the corresponding portion 305A of the joining region). In addition, the receiving structure 308 may also exist in at least a part of the region of the corresponding portion 305B of the lid region. In addition, the receiving structure 308 of the paper base material 304 may also exist in substantially the entire region of the corresponding portion 305B of the lid region as shown in B of Figure 29 (it may be dispersed in the entire surface region of the corresponding portion 305B of the lid region). In addition, Figure 29 In A to Figure 29 C, the positions corresponding to the points indicated by the reference numerals P1, P2, P3, P4,... represent the positions of the receiving structure 308.

[0302] (Erecting structure)

[0303] The paper base material 304 may also have an erecting structure 310 formed as a structure for erecting the fibers 306. The erecting structure 310 is preferably formed such that the adhesive substance 302 can enter toward the exposed surface 372 side compared to the fibers 306 disposed on the surface of the paper base material 304 in a state where the main body 303 is joined to the container main body 410 via the adhesive substance 302.

[0304] In the lid body 300B, at least a part of the erected structure 310 of the paper base material 304 is preferably exposed at least a part of the surface on the opposite surface 373 side of the mating region corresponding portion 305A.

[0305] Similar to the distribution of the receiving structure 308, the distribution of the erected structure 310 is not limited to the case where it is concentrated in a part of the mating region corresponding portion 305A, and may exist in substantially the entire region of the surface of the mating region corresponding portion 305A (it may be dispersed in the entire surface region of the mating region corresponding portion 305A). In addition, the erected structure may exist in at least a part of the lid region corresponding portion 305B. In addition, the erected structure 310 of the paper base material may exist not only in the mating region corresponding portion 305A, but also in substantially the entire region of the lid region corresponding portion 305B (it may be dispersed in the entire surface region of the lid region corresponding portion 305B).

[0306] A part of the erected structure 310 may also serve as the overlapping structure 309 described above. In addition, the erected structure 310 may be connected to the overlapping structure 309 according to the positional relationship and shape of the first fiber portion 311 and the second fiber portion 312 described later. In Figure 27 In the example of A, in the second fiber portion 312, a specified portion BC on one end side thereof becomes a portion forming the overlapping structure 309, and the specified portion BC and a specified portion FR on the other end side become portions forming the erected structure 310. In the state where the main body 303 is joined to the container main body 410 via the adhesive substance 302, the erected structure 310 can be maintained as shown in Figure 27 B of Figure 27 or separated as shown in C of

[0307] In addition, the erected structure 310 may also be such that, as a whole, it also serves as the overlapping structure 309 described above. For example, in Figure 24 In the example of B, it has a first fiber portion 311 composed of fibers 306 located on the exposed surface 372 side (fibers located inside compared to the second fiber portion 312 described later), and a second fiber portion 312 composed of fibers located on the opposite surface 373 side along the thickness direction of the paper base material 304 compared to the first fiber portion 311 (fibers arranged on the surface of the paper base material 304). And the fibers (second fiber portion 312) arranged on the surface of the paper base material 304 are erected obliquely (slightly toward the -Z direction side) with respect to the fibers (first fiber portion 311) located inside compared to the second fiber portion 312 (an erected structure 310 is formed) Figure 24In the drawing of B, it hangs obliquely downward), and when the main body 303 is viewed from above, at least a part of the first fiber portion 311 and the second fiber portion 312 overlap (an overlapping structure 309 is formed). Therefore, the structure formed by the first fiber portion 311 and the second fiber portion 312 can be formed into either an erect structure 310 or an overlapping structure 309.

[0308] Figure 24 In the example of B, a gap 314 is formed between the first fiber portion 311 and the second fiber portion 312, and the size of the gap 314 is such that in a state where the main body 303 is joined to the container main body 410 via the adhesive substance 302, the adhesive substance 302 can enter compared to the fibers 306 disposed on the surface of the paper base material 304 ( Figure 24 In B, it is the second fiber portion 312) toward the exposed surface 372 side ( Figure 24 In B, it is the first fiber portion 311 side).

[0309] In addition, Figure 24 In the example of B, one first fiber portion 311 and a second fiber portion 312 are formed, but when viewed from above the lid body 300B (when viewed from above the main body 303), among the first fiber portion 311 and the second fiber portion 312, when the region where the gap 314 is formed is set as the overlapping region ( Figure 28 In A of Figure 28 In B, it is indicated by the reference numeral OVL), as Figure 28 shown in B of Figure 28 In B, a second - 1 fiber portion 312A, a second - 2 fiber portion 312B, and a second - 3 fiber portion 312C are formed as the second fiber portion 312). In addition, as Figure 28 shown in A of Figure 28 In A, a first - 1 fiber portion 311A, a first - 2 fiber portion 311B, and a first - 3 fiber portion 311C are formed as the first fiber portion 311), there can also be a plurality of fiber portions that form the gap 314 together with the second fiber portion 312 as the first fiber portion 311 located in the overlapping region OVL.

[0310] (adhesive substance)

[0311] The adhesive substance 302 is a substance capable of bonding the main body 303 and the container main body 410. Examples of the adhesive substance 302 include resins such as thermoplastic resins and adhesives. The adhesive substance 302 is more preferably a resin layer 420 (resin coating) pre-formed on the container main body. However, this does not prohibit the adhesive substance 302 from being a substance sandwiched between the main body 303 and the container main body 410 independently of the main body 303 and the container main body 410. Generally, as the resin layer 420, thermoplastic resins such as polyethylene are mostly used. By pre-forming the adhesive substance 302 on the resin layer 420 (resin coating) of the container main body, when the lid 300B is bonded to the container 401 by heat sealing, the lid 300B and the container 401 can be bonded through the resin layer 420. That is, the resin layer 420 can function as the adhesive substance 302.

[0312] (Surface roughness)

[0313] The paper base material 304 is preferably such that the surface roughness (maximum height Rz) (μm) in at least a part of the joint area corresponding part 305A is a specified value or more. When the surface roughness is different on the surface of the paper base material 304, the surface with a larger surface roughness is preferably formed as the opposing surface 373. When a material with a large surface roughness of the paper base material 304 constituting the main body 303 is used, the contact area between the fibers 306 of the adhesive substance 302 disposed on the surface of the paper base material 304 and the adhesive substance 302 can be further increased in the state where the main body 303 is joined to the container main body 410 via the adhesive substance 302, and the bonding force between the lid 300B and the container 401 can be improved.

[0314] [(2) Function and effect]

[0315] Conventionally, as shown in Japanese Unexamined Patent Application Publication No. 2021-84646, which is a patent document, packaging components such as containers like cups and lids can be made of plastic from the viewpoints of cost and formability up to now. Regarding plastics, the large environmental burden has become a problem. In particular, for ordinary synthetic plastics such as petroleum-based synthetic resins, it is recognized that they cannot be naturally decomposed after disposal and will exist in nature for a long time. In response to this problem, even when plastics are used as raw materials for packaging components, biodegradable plastics have been explored. However, compared with ordinary synthetic plastics, although biodegradable plastics have natural decomposability, strong improvement is required in terms of cost. In view of this, for packaging components, the use of paper raw materials as raw materials with less environmental burden than plastics (non-plastic materials) is being explored. As a method of obtaining packaging components using paper raw materials, for example, there can be a method of obtaining a blank based on a paper base material and obtaining a packaging component through the processing of the blank.

[0316] When the packaging component is a lid, and the lid is obtained by processing a blank formed from a sheet (paper sheet) as a paper base material, in order to improve water resistance, it is also considered to form the lid from a sheet having resin layers formed on both sides. However, on the surface of the container, a resin coating is usually formed as a resin layer for waterproofing the container. As a result, depending on the material of the resin material constituting the resin layer, the adhesiveness with the resin constituting the resin coating may be impaired, and there is a risk that it is difficult to bond the container and the lid by a sealing method. Therefore, there is room for improvement in that the container and the lid can be bonded by a heat-sealing method even when the types of resins constituting the resin coating formed on the surface of the container are diverse. That is, for the lid, it is required to improve in terms of being able to bond the container and the lid by a sealing method even when the types of resins constituting the resin layer (resin coating) formed on the surface of the container are diverse.

[0317] This conventional technology and the requirement for improvement sometimes also apply to any of the lids of Form A. And according to the lids of Form A (for example, the lid of Form A1 and the lid of Form A2 described above), even when the types of resins constituting the resin layer (resin coating) formed on the surface of the container are diverse, the container and the lid can be bonded by a sealing method.

[0318] Moreover, according to the lid 300B of Form A2, the main body 303 of the lid 300B is composed of a paper base material 304 and has an overlapping structure 9. Thus, when the heat-sealing method is applied when installing the lid 300B on the container 401, the resin constituting the resin layer 420 formed on the surface of the edge portion 403 of the container 401 can enter toward the exposed surface 372 side compared to the fibers 306 disposed on the surface of the paper base material 304, and can be joined to the fibers (for example, the second fiber portion 312) exposed in the overlapping structure 309, and the bonding state between the resin layer 420 and the lid 300B can be further improved. That is, a lid can be obtained that uses a paper base material having heat-sealing properties as a non-plastic raw material. Moreover, as described in the application examples below, a container with a lid and a combination of a lid and a container can be obtained that use a lid that uses a paper base material having heat-sealing properties as a non-plastic raw material.

[0319] [(3) Variation]

[0320] (Variation 1)

[0321] For the lid 300B of the first form example, processing can also be appropriately performed. As the content of the processing, for example, adding a configuration for imparting a function to the main body 303 and joining other components to the main body 303 can be cited.

[0322] For example, as Figure 33 of A,Figure 33 As shown in B of FIG. 1, an insertion port 319 may also be formed in the lid body 300B of the first configuration example. An example of a lid body configured in this way is referred to as Modification 1 of the first embodiment. Figure 33 A of FIG. 1, Figure 33 B of FIG. 1 is a plan view and a cross-sectional view schematically showing an example of the lid body 300B of Modification 1 of the first embodiment. In addition, Figure 33 B of FIG. 1 is schematically showing Figure 33 a state of a longitudinal cross-section taken along line C-C in A of FIG. 1.

[0323] (Insertion port)

[0324] The insertion port 319 is a structural part that allows various components to be inserted into the container 401 from the outside when the lid body 300B is used for a container 450 with a lid body. Examples of components that can be inserted include a straw and the like. The insertion port 319 is formed at least in the lid area corresponding part 305B. Figure 33 A of FIG. 1, Figure 33 In the example of B of FIG. 1, it is formed by a penetrating part. The penetrating part has a structure (penetrating structure) that cuts from one surface (exposed surface 372) of the main body 303 in the vertical direction (thickness direction, Z-axis direction) to the other surface (opposite surface 373), and is a so-called cutting part 318. In addition, this penetrating part can also function as an exhaust part. Here, the exhaust part refers to a part that allows gas to pass from one side surface of the lid body 300B to the other side surface (from the opposite surface 373 side to the exposed surface 372 side).

[0325] (Modification 2)

[0326] In the lid body 300B of the first configuration example, a water-repellent treatment may also be performed on a specified area (Modification 2).

[0327] (Water-repellent treatment)

[0328] The method of the water-repellent treatment applicable to Modification 2 of the first configuration example is not particularly limited. For example, a method of dipping the paper base material 304 in a treatment liquid and drying it after pulling up the dipped paper base material 304 can be cited. In addition, a method of coating the surface of the paper base material 304 with a treatment liquid can be cited as a method of the water-repellent treatment. In addition, as a coating method, coating methods such as roll coating and spraying, intaglio printing, and screen printing can be specifically cited. As a printing method, coating methods such as roll coating and spraying, intaglio printing, and screen printing can be cited.

[0329] The treatment liquid can be exemplified by a liquid having a water repellent. Examples of the water repellent include fluorine-based water repellents and waxes.

[0330] [9-2 relates to the second configuration example of Configuration A2]

[0331] [(1) Structure]

[0332] As shown Figure 27 in C of Figure 27 , the lid 300B of the second form example has the same configuration as the first form except that in the second fiber portion 312 forming the standing structure 310 of the paper base material 304, there is a structure such that when the main body 303 is joined to the container main body 410 via the adhesive substance 302, the second fiber portion 312 bends toward the first fiber portion 311 to form an overlapping structure 309. Figure 27 C of Figure 27 is an enlarged cross-sectional view for explaining an example of the second form example.

[0333] (Second fiber portion)

[0334] In the state before the main body 303 is joined to the container main body 410 via the adhesive substance 302, as shown Figure 27 in A of Figure 27 , the second fiber portion 312 has a portion standing up in the direction away from the first fiber portion 311 (in A of Figure 27 , slightly in the -Z direction). (In A of Figure 27 , in the drawing, it is a portion hanging obliquely downward). When the main body 303 is joined to the container main body 410 via the adhesive substance 302, as shown Figure 27 in C of Figure 27 , the second fiber portion 312 becomes a state where even though it approaches the first fiber portion 311 as a whole, there is a gap 314 between the first fiber portion 311 and the second fiber portion 312. When the main body 303 is joined to the container main body 410 via the adhesive substance 302, an overlapping structure 309 is formed by the first fiber portion 311 and the second fiber portion 312. In addition, regarding the size of the gap 314 formed between the first fiber portion 311 and the second fiber portion 312, the size that allows the adhesive substance 302 to enter the gap 314 is maintained before and after the main body 303 is joined to the container main body 410 via the adhesive substance 302. Figure 27 in A of Figure 27 , in the drawing, it is a portion hanging obliquely downward). When the main body 303 is joined to the container main body 410 via the adhesive substance 302, as shown Figure 27 in C of Figure 27 , the second fiber portion 312 becomes a state where even though it approaches the first fiber portion 311 as a whole, there is a gap 314 between the first fiber portion 311 and the second fiber portion 312. When the main body 303 is joined to the container main body 410 via the adhesive substance 302, an overlapping structure 309 is formed by the first fiber portion 311 and the second fiber portion 312. In addition, regarding the size of the gap 314 formed between the first fiber portion 311 and the second fiber portion 312, the size that allows the adhesive substance 302 to enter the gap 314 is maintained before and after the main body 303 is joined to the container main body 410 via the adhesive substance 302.

[0335] [(2) Function and effect]

[0336] According to the lid of the second form example, the same effect as the first form example can be obtained. [9-3 relates to the third form example of Form A2]

[0337] [(1) Structure]

[0338] As shown Figure 30 in A of Figure 30 , Figure 30 in B of Figure 30 , the lid 300B of the third form example has the same configuration as the first form example except that a space portion 315 is formed between the first fiber portion 311 and the second fiber portion 312 forming the standing structure 310 of the paper base material 304. Figure 30 in A of Figure 30 , Figure 30B is an enlarged cross-sectional view showing an example of the third form.

[0339] (Space part)

[0340] The space part 315 has an opening part capable of receiving resin (such as the adhesive substance 302) from the outside. Figure 30 In the example of A, an opening part is formed in the front-back direction of the paper surface on which the attached drawing is described. In the plane direction of the paper surface, the space part 315 becomes a space closed by the first fiber part 311 and the second fiber part 312. In the third embodiment, the size of the space part 315 is such that in a state where the main body 303 is joined to the container main body 410 via the adhesive substance 302, the adhesive substance 302 can enter the space part 315 from the opening part.

[0341] [(2) Function and effect]

[0342] According to the lid of the third form, the same effect as that of the first form can be obtained. [Fourth form related to form A2 in 9-4]

[0343] [(1) Structure]

[0344] As Figure 31 shown in A of Figure 31 and B of Figure 31 shown in A of Figure 31 and B of

[0345] (Branch part)

[0346] The branch part 316 has an opening part capable of receiving resin (such as the adhesive substance 302) from the outside. Figure 31 In the example of A of

[0347] [(2) Function and effect]

[0348] The lid body according to the fourth embodiment can achieve the same effect as that of the first embodiment. [9-5 relates to the fifth embodiment of Form A2]

[0349] [(1) Structure]

[0350] As shown in A of Figure 32 and B of Figure 32 , the lid body 300B of the fifth embodiment has the same configuration as that of the first embodiment, except for the structure in which the third fiber portion 313 is sandwiched between the first fiber portion 311 and the second fiber portion 312 that form the overlapping structure 309 of the paper base material 304. In the fifth embodiment, the gap (the first gap 314A) between the first fiber portion 311 and the third fiber portion 313 and the gap (the second gap 314B) between the third fiber portion 313 and the second fiber portion 312 are both sized such that in a state where the main body 303 is joined to the container body 410 via the adhesive substance 302, the adhesive substance 302 can enter toward the exposed surface 372 side (that is, into the first gap 314A and the second gap 314B) compared to the fibers 306 disposed on the surface of the paper base material 304.

[0351] [(2) Function and effect]

[0352] According to the lid body 300B of the fifth embodiment, the same effect as that of the first embodiment can be achieved.

[0353] In the lid body of the present invention, the configurations shown in the above-described first to fifth embodiments can be appropriately combined (or coexist). That is, in the lid body of the present invention, for example, the configuration of the first fiber portion and the second fiber portion shown in the first embodiment and the configuration of the first fiber portion and the second fiber portion shown in the second embodiment can coexist.

[0354] [9-6 Application example of the lid body of Form A2]

[0355] The lid body 300B described above can be used for the container 450 with a lid as shown in A of Figure 25 and B of Figure 25 . Figure 25 A of Figure 25 is a perspective view showing an embodiment in which the lid body 300B is joined to the edge portion 403 of the outer periphery of the opening portion 402 of the container 401 having the opening portion 402 formed at the upper end. Figure 25 B of Figure 25 is a cross-sectional view schematically showing the state of the longitudinal cross-section of the line in A of Figure 25 . The container 450 with a lid will be further described using A of

[0356] (Container with a lid)

[0357] The container 450 with a lid has a joint portion 451 where the container 401 is joined to the lid 300B, and the area of the lid 300B that forms the joint portion 451 becomes the joint area RA. The joining method of the lid 300B to the container 401 is not particularly limited, and joining methods such as a hot melt method (heat sealing) can be appropriately used. Hereinafter, the case where the lid 300B of the first embodiment is used for the container 450 with a lid will be described as an example.

[0358] The container 401 has: a container body 410, which has a cylindrical side wall 404 that becomes thicker in the upward direction (thinner at the front end in the downward direction) and a bottom 407, and forms a space portion 405 inside; and an opening 402, which opens at the upper end of the container body 410 (the upper end of the side wall 404). Although not shown, the opening 402 of the container 401 is formed in a circular shape. However, the container 401 shown here is an example, and the structure of the container 401 is not limited. For example, the container 401 may also form the opening 402 in a rectangular shape. The container 401 only needs to be able to cover the opening 402 with the lid 300B. In addition, the items stored inside the container 401 (space portion 405) are not particularly limited, and for example, liquid items, or combinations of them with solid items, etc. can be cited.

[0359] Figure 25 In the container 101 shown in A etc., the edge portion 403 of the opening 402 has a flange portion. The flange portion may be a curled portion 408 formed by rolling up the member forming the container body 410 outward, or may be formed as a portion (eaves portion) that extends in the lateral direction on a plane.

[0360] In the container 401, preferably, a resin layer 420 is formed on at least the surface of the edge portion 403 of the container body 410. Figure 26 In the example of C, a resin layer 420 is formed in the entire area from the inner peripheral surface 406 of the container body 410 to the surface of the edge portion 403. In this case, the resin layer 420 is preferably a resin that can function as an adhesive substance 302. In such a configuration, the resin layer 420 can function as an adhesive substance 302. That is, without applying an additional adhesive prepared separately on the container 401, the lid can be bonded to the container 401 by heat sealing or the like. In addition, when the resin layer 420 is formed on the container body 410, it is sufficient to form the resin layer 420 at least on the surface of the edge portion 403, and the resin layer 420 can be omitted on the inner peripheral surface 406 of the container body 410. In addition, the container body 410 can be formed by processing a sheet material having paper fibers. In this case, as also shown in B etc., the container body 410 has fibers 421 such as paper fibers. Figure 26 In the example of B etc., the container body 410 has fibers 421 such as paper fibers.

[0361] In addition, the lid 300B can be configured as a combination with a container 401 having an opening 402.

[0362] Regarding the lid 300B of Form A2, examples will be given for further illustration.

[0363] Examples

[0364] Example 1

[0365] Preparation Figure 23 The lid and the container shown are used to obtain a container with a lid by heat sealing. As the container, a container can be used in which a resin layer is continuously formed on the surface and the inner peripheral surface area (this area) of the edge portion with respect to a container body formed by processing a sheet material having paper fibers. The shape of the container is adopted as Figure 25 A as shown in Figure 25 B as shown in. The temperature during the application of the heat sealing method is set to 200°C.

[0366] The joint portion between the edge portion and the lid in the obtained container with a lid is observed with an electron microscope (magnification: 100 times). Figure 34 The results are shown. Figure 34 In, reference numeral A1 represents the container body of the container, reference numeral B1 represents the main body of the lid. Reference numeral C1 represents the resin layer, and reference numeral C2 represents the resin constituting the resin layer. Reference numerals B2 and B3 represent the first fiber portion and the second fiber portion, and reference numeral B4 represents the gap. Thus, it is confirmed that the resin C2 constituting the resin layer C1 enters the gap B4 between the fibers (the first fiber portion B2 and the second fiber portion B3) constituting the lid, and it is also confirmed that the resin layer C1 functions as an adhesive substance.

[0367] As described so far, the present invention can be applied to lids of such various forms (Embodiments 1 to 5 and Form A). In addition, it can also be applied to lids of forms other than the above (lid 10, lid 300A, lid 300B, etc.). The above has described the lid of the present invention in detail, but the above content is merely an example of the lid of the present invention and is not limited thereto. Therefore, it can be appropriately changed within the scope not departing from the gist of the present invention. In addition, the structures of the above-mentioned lids can be used independently for the structures of each example of the lid, or the structures of each example of the lid can be appropriately combined and applied. For example, the configuration shown in Form A2 can be combined with the fifth embodiment.

[0368] Based on the description in the present specification above, the present invention can adopt the configurations shown in [E1] to [E11] below.

[0369] [E1] A lid, wherein,

[0370] It is configured to be mountable relative to a container having an opening and a rim forming the opening, and has a top surface that covers the opening when mounted on the container.

[0371] The top surface has a paper base material made of a paper material, a through portion penetrating the paper base material, a gas-liquid separation material capable of separating the gas phase and at least a part of the liquid phase of the liquid from a mixed fluid having a gas phase and a liquid phase, and a thermoplastic coating agent.

[0372] The gas-liquid separation material has a paper ventilation sheet including long fibers and having air permeability, and a liquid repellent is disposed on at least one surface of the paper ventilation sheet to impart liquid repellency to the paper ventilation sheet.

[0373] The gas-liquid separation material is arranged to cover at least a part of the through portion when the paper base material is viewed from above.

[0374] The coating agent bonds the gas-liquid separation material and the paper base material.

[0375] [E2] In the lid body described in [E1] above, the liquid repellent is a water repellent.

[0376] [E3] In the lid body described in [E1] or [E2] above, the paper ventilation sheet is a non-woven fabric.

[0377] [E4] In the lid body described in any one of [E1] to [E3] above, the long fibers are paper fibers.

[0378] [E5] In the lid body described in any one of [E1] to [E4] above, the liquid repellent bonds to at least a part of the long fibers.

[0379] [E6] In the lid body described in any one of [E1] to [E5] above, the liquid repellent is also disposed inside the paper ventilation sheet.

[0380] [E7] In the lid body described in any one of [E1] to [E6] above, the gas-liquid separation material is formed with a cut-in portion and / or a half-cut portion at a position corresponding to the through portion.

[0381] [E8] In the lid body described in any one of [E1] to [E7] above, the gas-liquid separation material includes the long fibers as a main component.

[0382] [E9] A container with a lid body, which has:

[0383] The lid body described in any one of [E1] to [E8] above; and

[0384] The container, which has the opening formed at the upper end and the rim forming the outer periphery of the opening.

[0385] The lid is joined to the container.

[0386] [E10] A combination of a lid and a container, which has:

[0387] The lid according to any one of the above [E1] to [E8]; and

[0388] The container, which has the opening formed at the upper end and the rim forming the outer periphery of the opening.

[0389] Based on the description in this specification above, in this specification, as the present invention, the gas-liquid separation materials shown in the following [F1] to [F17] can be grasped.

[0390] [F1] A gas-liquid separation material, which has: a paper base material made of a paper material; a through portion penetrating the paper raw material; a gas-liquid separation material capable of separating the gas in the gas phase and at least a part of the liquid in the liquid phase from a mixed fluid having a gas phase and a liquid phase; and a coating agent having thermoplasticity.

[0391] [F2] In the gas-liquid separation material according to the above [F1], the liquid repellent is a water repellent.

[0392] [F3] In the gas-liquid separation material according to the above [F1] or [F2], the paper ventilation sheet is a non-woven fabric.

[0393] [F4] In the gas-liquid separation material according to any one of the above [F1] to [F3], the long fiber is a paper fiber.

[0394] [F5] In the gas-liquid separation material according to any one of the above [F1] to [F4], the liquid repellent is bonded to at least a part of the long fiber.

[0395] [F6] In the gas-liquid separation material according to any one of the above [F1] to [F5], the liquid repellent is also disposed inside the paper ventilation sheet.

[0396] [F7] In the gas-liquid separation material according to any one of the above [F1] to [F6], the gas-liquid separation material includes the long fiber as a main component.

[0397] In addition, based on the description of the lid related to Form A (Form A1 and Form A2) in this specification, the present invention can also adopt the following [G1] to [G7] configurations.

[0398] [G1] A lid, wherein,

[0399] It has a main body which is formed in such a manner as to be able to be joined to the container body of a container via an adhesive substance, and has a paper base material having a plurality of paper fibers as fibers. Among them, the container body has an opening formed at the upper end and a rim portion forming the outer periphery of the opening.

[0400] The main body has: a joining region corresponding portion corresponding to a joining region defined as a region to be joined to the container along the rim portion of the container; and a lid region corresponding portion formed of a portion located inside the joining region corresponding portion.

[0401] Assuming a state in which the main body and the container body are joined via the adhesive substance, the surface of the main body that becomes the surface facing the container is defined as the facing surface, and the surface facing away from the facing surface is defined as the exposed surface. In this case,

[0402] The paper base material has an overlapping structure in which the paper fibers are overlapped in such a manner that the adhesive substance can enter toward the exposed surface side compared to the paper fibers disposed on the surface of the paper base material in a state where the main body is joined to the container body via the adhesive substance.

[0403] At least a part of the overlapping structure of the paper base material is exposed on at least a part of the surface of the joining region corresponding portion on the facing surface side.

[0404] A lid, wherein,

[0405] It has a main body which is formed in such a manner as to be able to be joined to the container body of a container via an adhesive substance, and has a paper base material having a plurality of paper fibers as fibers. Among them, the container body has an opening formed at the upper end and a rim portion forming the outer periphery of the opening.

[0406] The main body has: a joining region corresponding portion corresponding to a joining region defined as a region to be joined to the container along the rim portion of the container; and a lid region corresponding portion formed of a portion located inside the joining region corresponding portion.

[0407] Assuming a state in which the main body and the container body are joined via the adhesive substance, the surface of the main body that becomes the surface facing the container is defined as the facing surface, and the surface facing away from the facing surface is defined as the exposed surface. In this case,

[0408] The paper base material has an overlapping structure in which the paper fibers overlap in such a manner that the adhesive can enter toward the exposed surface side compared to the paper fibers disposed on the surface of the paper base material in a state where the main body is joined to the container main body via the adhesive.

[0409] At least a part of the overlapping structure of the paper base material is exposed on at least a part of the surface on the opposite surface side in the surface of the joint area corresponding part.

[0410] [G2] In the lid body described in the above [G1],

[0411] The overlapping structure of the paper base material has a first fiber part composed of the fibers located on the exposed surface side, a second fiber part composed of the fibers located on the inner side in the thickness direction of the paper base material compared to the first fiber part, and a space part formed between the first fiber part and the second fiber part.

[0412] When the main body is joined to the container main body via the adhesive, the adhesive enters at least a part of the space part.

[0413] [G3] In the lid body described in the above [G1] or [G2]

[0414] The overlapping structure of the paper base material has a first fiber part composed of the fibers located on the exposed surface side, and a second fiber part composed of the fibers located on the opposite surface side in the thickness direction of the paper base material compared to the first fiber part.

[0415] The first fiber part and the second fiber part are connected.

[0416] A branch part is formed by the first fiber part and the second fiber part.

[0417] [G4] A container with a lid body, which has:

[0418] The lid body described in any one of the above [G1] to [G3]; and

[0419] The container having the container main body, and the container main body has the opening part formed at the upper end.

[0420] The lid body is joined to the container via the adhesive.

[0421] [G5] In the container with a lid body described in the above [G4],

[0422] The container main body forms a resin layer at least on the surface of the edge part.

[0423] The adhesive substance is the resin that constitutes the resin layer.

[0424] [G6] A combination of a lid and a container, comprising:

[0425] The lid according to any one of the above [G1] to [G3]; and

[0426] The container having the container body, the container body having the opening formed at the upper end,

[0427] The resin layer is formed on at least the surface of the edge portion of the container body,

[0428] The resin layer is a resin capable of functioning as the adhesive substance.

[0429] [G7] A lid, wherein,

[0430] It has a main body, the main body having a paper base material with a plurality of paper fibers as fibers,

[0431] The main body is formed in a manner capable of being joined to a container having an opening formed at the upper end and an edge portion forming the outer periphery of the opening, and having a resin coating on the surface,

[0432] The main body has a joint area corresponding part corresponding to the joint area defined as the area to be joined to the container along the edge portion of the container, has a part exposing the surface of the paper base material, and is configured to be able to bond at least a part of the resin coating to at least a part of the joint area corresponding part.

[0433] Explanation of reference numerals

[0434] 10: Lid

[0435] 10A: Lid

[0436] 10B: Lid

[0437] 10C: Lid

[0438] 10D: Lid

[0439] 11: Top surface

[0440] 11A: Outer peripheral end

[0441] 11B: Lower surface

[0442] 12: Bending portion

[0443] 13: Side wall portion

[0444] 13A: Inner peripheral surface

[0445] 13B: Outer Peripheral Surface

[0446] 14: Small Wall Portion

[0447] 14A: First Small Wall Portion

[0448] 14B: Second Small Wall Portion

[0449] 15: Small Wall Joint Portion

[0450] 16: Insertion Port

[0451] 17: Penetration Portion

[0452] 18: Port Formation Structure

[0453] 18A: Small Opening Portion

[0454] 18B: Small Cover Portion

[0455] 18C: Hinge Portion

[0456] 18D: Base Portion

[0457] 19: Pull Tab Component

[0458] 20: Overlap Portion

[0459] 26: Protrusion Portion

[0460] 31: Base End Portion

[0461] 31A: End Portion

[0462] 31B: End Portion

[0463] 32: Front Edge Portion

[0464] 33: Side End Portion

[0465] 33A: First Side End Portion

[0466] 33B: Second Side End Portion

[0467] 34: Inner Surface Portion

[0468] 35: Outer Surface Portion

[0469] 40: Main Body

[0470] 41: Paper Base Material

[0471] 42: Gas-Liquid Separation Material

[0472] 43: Paper Ventilation Sheet

[0473] 43A: Fiber

[0474] 44: Liquid Repellent

[0475] 45: Cutting Portion

[0476] 46: Half-cut part

[0477] 47: Inter-fiber gap part

[0478] 48: Coating agent

[0479] 49: Release paper joint part

[0480] 50: Blank

[0481] 51: Bending allowance part

[0482] 52: First corresponding part

[0483] 53: Second corresponding part

[0484] 54: Cutting-in part

[0485] 55: Sheet

[0486] 72: Exposed surface

[0487] 73: Opposite surface

[0488] 74: Peripheral edge

[0489] 80: Gas-liquid separation material

[0490] 82: Non-joint part

[0491] 83: Gap

[0492] 95A: Joint area corresponding part

[0493] 95B: Cover area corresponding part

[0494] 95C: Outer area corresponding part

[0495] 101: Container

[0496] 102: Opening part

[0497] 103: Edge part

[0498] 104: Side wall

[0499] 105: Space part

[0500] 107: Bottom

[0501] 108: Curled part

[0502] 110: Container body

[0503] 111: Outer peripheral surface

[0504] 150: Container with lid

[0505] 151: Contact part

[0506] 201: Cover

[0507] 202: Top surface

[0508] 203: Side wall part

[0509] 205: Upper wall

[0510] 206: Lower wall

[0511] 222: Top cover forming part

[0512] 223: Side wall forming part

[0513] 224: Recess

[0514] 225: Protrusion

[0515] 226: Extension part

[0516] 226A: Inner surface

[0517] 227: Recessed part

[0518] 228A: Inner end

[0519] 228B: Outer end

[0520] 230: Joining allowance

[0521] 231: First part

[0522] 232: Second part

[0523] 233: First contact wall part

[0524] 234: Second contact wall part

[0525] 235: Continuous part

[0526] 236: Side wall upper end curling part

[0527] 237: Lower first contact wall part

[0528] 238: Lower second contact wall part

[0529] 239: Lower end side continuous part

[0530] 251: First blank

[0531] 252: Second blank

[0532] 253: Edge part

[0533] 290: Main body

[0534] 291: Top surface

[0535] 292: Concavity and convexity

[0536] 292A: Portion

[0537] 292B: Portion

[0538] 295A: Corresponding portion of joint area

[0539] 295B: Corresponding portion of cover area

[0540] 295C: Corresponding portion of outer area

[0541] 298: Exposed surface

[0542] 299: Opposite surface

[0543] 300A: Cover body

[0544] 300B: Cover body

[0545] 302: Adhesive substance

[0546] 303: Main body

[0547] 304: Paper base material

[0548] 305A: Corresponding portion of joint area

[0549] 305B: Corresponding portion of cover area

[0550] 305C: Corresponding portion of outer area

[0551] 306: Fiber

[0552] 306A: Paper fiber

[0553] 307: Concavity and convexity structure

[0554] 308: Receiving structure

[0555] 309: Overlapping structure

[0556] 310: Standing structure

[0557] 311: First fiber part

[0558] 311A: Fiber part

[0559] 311B: Fiber part

[0560] 311C: Fiber part

[0561] 312: Second fiber part

[0562] 312A: Fiber part

[0563] 312B: Fiber part

[0564] 312C: Fiber part

[0565] 313: Third fiber part

[0566] 314: Gap

[0567] 314A: First gap

[0568] 314B: Second gap

[0569] 315: Space part

[0570] 316: Part

[0571] 316A: Connecting part

[0572] 318: Cutting-in part

[0573] 319: Insertion port

[0574] 372: Exposed surface

[0575] 373: Opposite surface

[0576] 401: Container

[0577] 402: Opening part

[0578] 403: Edge part

[0579] 404: Side wall

[0580] 405: Space part

[0581] 406: Inner peripheral surface

[0582] 407: Bottom part

[0583] 408: Crimped part

[0584] 410: Container body

[0585] 420: Resin layer

[0586] 421: Fiber

[0587] 450: Container with lid

[0588] 451: Joint part

[0589] B2: First fiber part

[0590] B3: Second fiber part

[0591] B4: Gap

[0592] BC: Specified part

[0593] C1: Resin layer

[0594] CB: Center

[0595] CT: Center

[0596] DR: Arrow

[0597] EI: Area

[0598] EI: Area

[0599] FD: Arrow

[0600] FGA: Gas

[0601] FLI: Liquid

[0602] FR: Specified Part

[0603] FW: Mixed Fluid

[0604] OVL: Overlapping Area

[0605] R: Contact Area

[0606] RA: Joining Area

[0607] RN: Joining Area

[0608] Rz: Maximum Height

[0609] WK: Area

[0610] XA: Area

[0611] XR1: Area

[0612] XR2: Area

[0613] XRA: Area

[0614] XS1: Area

[0615] XS2: Area

[0616] XS3: Area

[0617] XS4: Area.

Claims

1. A cover, wherein: The cover is configured to be attachable to a container having an opening and an edge forming the opening, and has a top surface portion that covers the opening when attached to the container. The top surface portion comprises a paper substrate made of a paper material, a penetration portion penetrating the paper substrate, a gas-liquid separation material capable of separating a gas in the gas phase and at least a portion of a liquid in the liquid phase from a mixed fluid having a gas phase and a liquid phase, and a thermoplastic coating agent. The gas-liquid separation material comprises a paper-like air-permeable sheet including long fibers and having air permeability, and a liquid repellent agent which imparts liquid repellency to the paper-like air-permeable sheet is disposed on at least one surface of the paper-like air-permeable sheet. The gas-liquid separation material is arranged to cover at least a portion of the penetration portion when the paper substrate is viewed from above. The coating agent bonds the gas-liquid separation material and the paper substrate.

2. The cover according to claim 1, wherein: The liquid repellent is a water repellent.

3. The cover according to claim 1, wherein: The paper ventilation sheet is a non-woven fabric.

4. The cover according to claim 1, wherein: The long fibers are paper fibers.

5. The cover according to claim 1, wherein: The liquid repellent is bonded to at least a portion of the long fibers.

6. The cover according to claim 1, wherein: The liquid repellent is also disposed inside the paper air-permeable sheet.

7. The cover according to claim 1, wherein: The gas-liquid separation material has a cut portion and / or a half cut portion formed at a position corresponding to the penetration portion.

8. The cover according to claim 1, wherein: The gas-liquid separation material includes the long fibers as a main component.

9. A container with a cover, wherein: have: The cover according to claim 1; and The container has the opening formed at the upper end and an edge forming the outer periphery of the opening, The cover is joined to the container.

10. A combination of a cover and a container, wherein: have: The cover according to claim 1; and The container includes the opening formed at the upper end and an edge forming the outer periphery of the opening.

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