Lid

Abstract

To provide a lid body that can stably and easily reseal a container. [Solution] The lid of one embodiment is a lid that seals the opening of a container that stores instant food that is cooked by pouring hot water over it, and has a main body that is attached to the opening edge of the container, and at least two gripping pieces that protrude outward from the main body. When the main body is virtually divided into two equal regions when viewed in the thickness direction, the at least two gripping pieces are positioned on the outer edge of one of the two regions. The main body and the at least two gripping pieces are formed from a laminated sheet, and the laminated sheet has a paper base layer and a thermal adhesive resin layer provided on the base layer. When the weight per unit area of ​​the base layer is G1 and the weight per unit area of ​​the lid is G2, G1 and G2 satisfy 0.75≦G1 / G2.

Description

[Technical Field]

[0001] The present invention relates to a lid. [Background technology]

[0002] Instant foods (e.g., instant noodles) are provided in a container with the opening of the container sealed with a lid. In this case, a user peels a portion of the lid off the container to open the container. The user pours hot water into the container through the opening and then reseals the container with the lid. In this case, it is known to fix the lid to the container with adhesive tape in order to maintain the state in which the lid reseals the opening of the container (see Patent Document 1). Then, after maintaining the state in which the lid reseals the container for a certain period of time, the lid is separated from the container. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 61-105671 Summary of the Invention [Problem to be solved by the invention]

[0004] When resealing a container with a lid, if the lid is fixed to the container with adhesive tape, it is necessary to prepare and fasten the adhesive tape, which is time-consuming and requires adhesive tape in addition to the container and lid. Meanwhile, in recent years, there has been a demand for reducing resource consumption in order to reduce environmental impact.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a lid that allows a container to be resealed stably and easily. [Means for solving the problem]

[0006] One example of a lid according to the present invention is a lid that seals the opening of a container that stores instant food that is cooked by pouring hot water over it. The lid has a main body that is attached to the opening edge of the container and at least two tabs that extend outward from the main body. When the main body is virtually divided into two equal regions when viewed in the thickness direction, the at least two tabs are positioned on the outer periphery of one of the two regions. The main body and the at least two tabs are formed from a laminated sheet that has a paper base layer and a thermal adhesive resin layer provided on the base layer. When the weight per unit area of ​​the base layer is G1 and the weight per unit area of ​​the lid is G2, G1 and G2 satisfy formula (1). 0.75≦G1 / G2 (1)

[0007] When the lid is applied to the container, the container can be easily resealed with the lid by bending the tab. Furthermore, since the laminated sheet forming the lid is configured to satisfy the condition of formula (1), the container can be stably resealed with the lid.

[0008] The above G1 and G2 may satisfy the formula (2). 0.9≦G1 / G2 (2)

[0009] In this case, the container can be resealed more reliably with the lid.

[0010] Another example of a lid according to the present invention is a lid for sealing the opening of a container for storing instant food that is cooked by pouring hot water over it, the lid having a main body that is attached to the edge of the opening of the container and at least two tabs that protrude outward from the main body, wherein when the main body is virtually divided into two equal regions as viewed in the thickness direction, the at least two tabs are located on the outer periphery of one of the two regions, the main body and the at least two tabs are formed from a laminated sheet, the laminated sheet having a paper base layer, a thermal adhesive resin layer provided on the base layer, and a metal layer that is located between the base layer and the thermal adhesive resin layer, wherein G1 is the weight per unit area of ​​the base layer, G2 is the weight per unit area of ​​the lid, and G3 is the weight per unit area of ​​the metal layer, and G1, G2, and G3 satisfy formula (3). 0.75≦{G1+(2×G3)} / G2···(3)

[0011] When the lid is applied to the container, the container can be easily resealed with the lid by bending the tab. Furthermore, since the laminated sheet forming the lid is configured to satisfy the condition of formula (3), the container can be stably resealed with the lid.

[0012] The above G1, G2, and G3 may satisfy formula (4). 0.9≦{G1+(2×G3)} / G2···(4)

[0013] Another example of a lid according to the present invention is a lid for sealing the opening of a container for storing instant food that is cooked by pouring hot water over it, the lid having a main body attached to the opening edge of the container and at least two tabs extending outward from the main body, wherein when the main body is virtually divided into two equal regions as viewed in the thickness direction, the at least two tabs are disposed on the outer periphery of one of the two regions, and the main body and the at least two tabs are formed from a laminated sheet. The laminate sheet has a paper base layer and a thermal adhesive resin layer provided on the base layer, and the laminate sheet is a rectangular sample piece having the same layer structure as the laminate sheet, with a short side length of 15 mm and a long side length of 100 mm.When the sample piece is folded at the center in the longitudinal direction so that the thermal adhesive resin layer is in contact with the sample piece, and the restoration angle of the sample piece at the stage when the movement associated with restoration stops is defined as the dead hold value of the laminate sheet, the dead hold value is 5 degrees or more and 25 degrees or less.

[0014] When the lid is applied to the container, the container can be easily resealed with the lid by bending the tab. Furthermore, since the deadhold value of the laminated sheet forming the lid is within the above angle range, the container can be stably resealed with the lid.

[0015] The deadhold value may be between 10 and 20 degrees. In this case, the container can be resealed more stably with the lid.

[0016] The deadhold value may be an average value of the deadhold value in the MD direction and the deadhold value in the TD direction of the laminated sheet. [Effects of the Invention]

[0017] According to the present invention, a lid that can stably and easily reseal a container can be provided. [Brief explanation of the drawings]

[0018] [Figure 1]FIG. 1 is a schematic diagram of the cover according to the first embodiment in use. [Figure 2] FIG. 2 is a plan view of the lid shown in FIG. [Figure 3] FIG. 3 is a schematic diagram showing the layer structure of the laminated sheet that forms the lid shown in FIG. [Figure 4] FIG. 4 is a schematic diagram showing a state in which a part of the lid body is peeled off from the container in the state shown in FIG. [Figure 5] FIG. 5 is a schematic diagram showing the state in which the container is resealed with the lid from the state shown in FIG. [Figure 6] FIG. 6 is a plan view of the lid according to the second embodiment. [Figure 7] FIG. 7 is a schematic diagram showing the layer structure of the laminated sheet that forms the lid shown in FIG. [Figure 8] FIG. 8 is a plan view of the sample piece used to measure the deadhold value. [Figure 9] FIG. 9 is a diagram illustrating a method for measuring the deadhold value. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The same elements are given the same reference numerals. Duplicate explanations will be omitted. The dimensional ratios of the drawings do not necessarily match those in the description.

[0020] (First embodiment) Fig. 1 is a schematic diagram of a lid according to one embodiment in use. Fig. 1 is a side view of the lid in use, and for ease of explanation, Fig. 1 shows a view in which a portion of the container 2 and the lid 10 are cut away.

[0021] The lid 10 shown in Fig. 1 is a lid that seals an opening 2a of a container 2 that stores an instant food 1 (such as instant noodles) that is cooked by pouring hot water over it. That is, the lid 10 is a lid for an instant food container.

[0022] The container 2 to which the lid 10 is applied has a cylindrical shape with a bottom. In this embodiment, the shape of the container 2 is circular when viewed in the thickness direction of the bottom wall of the container 2. The open end 2b of the container 2 located on the opposite side from the bottom wall is bent outward, and a part of the open end 2b forms a flange portion.

[0023] As shown in Fig. 2, in a plan view, the lid 10 has a main body 11 and at least two gripping pieces 12. Fig. 2 is a plan view of the lid 10, showing the lid 10 as viewed from the thickness direction.

[0024] The main body 11 is the portion that closes the opening 2a of the container 2 when the lid 10 is used with the container 2. The main body 11 has the same shape as the opening end 2b, and in this embodiment is circular. Therefore, in this embodiment, the center 11a of the main body 11 is the center of the circle and coincides with the center of the opening end 2b. The diameter D of the main body 11 depends on the size of the container 2, but may be, for example, 20 mm to 200 mm, or 50 mm to 180 mm. Examples of the diameter D are 96.5 mm, 80.5 mm, 166 mm, etc.

[0025] The at least two tabs 12 are portions that continuously protrude outward from the periphery of the main body 11. When the main body 11 is virtually divided into two equal regions as viewed in the thickness direction, the at least two tabs 12 are arranged on the outer periphery of one of the two regions (hereinafter also referred to as the "semi-circumferential region"). The semi-circumferential region where the at least two tabs 12 are arranged may be a region that is peeled off from the container 2 to pour hot water into the container 2 after the lid 10 has been used. The tabs 12 are, for example, tabs. As shown in FIG. 1 , when the lid 10 is used with the container 2, the tabs 12 are located outside the opening end 2b of the lid 10. The tabs 12 are used as an opening start point when a user opens the container 2 closed with the lid 10, and also as a locking device for fastening the lid 10 to the container 2 when the lid 10 is used to reseal the opening 2a of the container 2.

[0026] In this embodiment, as shown in Fig. 2, a configuration will be described in which the lid body 10 has two gripping pieces 12. When distinguishing between the two gripping pieces 12, the two gripping pieces 12 will be referred to as a first gripping piece 121 and a second gripping piece 122.

[0027] In this embodiment, the first gripping piece 121 has a tongue-like or substantially triangular shape, and has a first apex 121a that is furthest away (in the radial direction) toward the outside of the main body 11. In the lid 10, the length L between the first apex 121a and the part of the main body 11 opposite the center 11a and the first apex 121a is, for example, 25 mm or more and 220 mm or less, and may be 55 mm or more and 200 mm or less. The length L is the maximum length of the lid 10.

[0028] The second gripping piece 122 is disposed around the center 11a of the main body 11 within a predetermined angular range from the first gripping piece 121. An example of the relative positions of the first gripping piece 121 and the second gripping piece 122 will be specifically described using the embodiment in which the first gripping piece 121 and the second gripping piece 122 have a first apex 121a and a second apex 122a as shown in FIG.

[0029] The first gripping piece 121 and the second gripping piece 122 are disposed on the outer periphery of a semicircular region of the circular main body 11. The first gripping piece 121 and the second gripping piece 122 are disposed so that the angle θ between the imaginary lines 14a and 14b shown in FIG. 2 (the central angle in this embodiment) falls within the predetermined angle range. The imaginary line 14a is a virtual line passing through the first apex 121a and the center 11a, and the imaginary line 14b is a virtual line passing through the second apex 122a and the center 11a. The predetermined angle range for the angle θ is less than 180 degrees, and may be, for example, between 45 degrees and 105 degrees, or between 45 degrees and 90 degrees. For ease of explanation, the relative positions of the first gripping piece 121 and the second gripping piece 122 will be described using the angle θ.

[0030] As shown in Fig. 3, the lid body 10 is formed by a laminated sheet 20 including a paper substrate layer 21 and a thermal adhesive resin layer 23. Fig. 3 is a schematic diagram for explaining the layer structure of the laminated sheet 20 that forms the lid body 10. The substrate layer 21 and the thermal adhesive resin layer 23 are laminated in this order from the outside (the side opposite to the container 2) in the state of use shown in Fig. 1. The thickness (µm) of the laminated sheet 20 is, for example, 50 µm or more and 300 µm or less, and may be 70 µm or more and 250 µm or less.

[0031] The base layer 21 is a layer made of paper itself. In this embodiment, the base layer 21 corresponds to the outer layer of the lid 10. The paper that makes up the base layer 21 is, for example, fine paper, special fine paper, coated paper, art paper, cast coated paper, Japanese paper, imitation paper, kraft paper, etc. The base layer 21 may be made of recycled paper. The basis weight of the base layer 21 is, for example, 30 g / m 2 More than 200g / m 2 The lower limit of the basis weight of the base material layer 21 is 40 g / m 2 Or 50g / m 2 The upper limit of the basis weight of the base layer 21 is 180 g / m 2 Or 160g / m 2 The above basis weight is, for example, a value when the moisture content of the paper constituting the base layer 21 is 3% or more and 7% or less. The thickness of the base layer 21 is, for example, 20 μm or more and 230 μm or less, and may be 30 μm or more and 210 μm or less. The mass of the base layer 21 is, for example, 51% or more of the total mass of the layers constituting the laminated sheet 20 (i.e., the total mass of the lid body 10). In this case, the laminated sheet 20 is a sheet containing paper as a main component, and the lid body 10 is a paper lid body.

[0032] Product information, opening instructions, etc. may be printed on the base material layer 21. In this case, the laminate sheet 20 has a printed layer on the base material layer 21 (for example, on the side of the base material layer 21 opposite to the thermal adhesive resin layer 23).

[0033] The thermal adhesive resin layer 23 is an inner layer in the lid 10, and is a layer for bonding the lid 10 to the open end 2b of the container 2. The thermal adhesive resin layer 23 is, for example, a sealant layer. The thickness of the thermal adhesive resin layer 23 is, for example, 5 μm or more and 70 μm or less. The lower limit of the thickness of the thermal adhesive resin layer 23 may be 10 μm or 15 μm. The upper limit of the thickness of the thermal adhesive resin layer 23 may be 45 μm or 40 μm.

[0034] An example of a material for the thermal adhesive resin layer 23 is a polyolefin-based resin. Specific examples of materials that can be used for the thermal adhesive resin layer 23 include ethylene-based resins such as low-density polyethylene resin (LDPE), medium-density polyethylene resin (MDPE), linear low-density polyethylene resin (LLDPE), ethylene-vinyl acetate copolymer (EVA), ethylene-α-olefin copolymer, and ethylene-methacrylic acid resin copolymer, and polypropylene-based resins such as a blend resin of polyethylene and polybutene, homopolypropylene resin (PP), propylene-ethylene random copolymer, propylene-ethylene block copolymer, and propylene-α-olefin copolymer. The thermal adhesive resin layer 23 can be formed, for example, by a method of extruding the resin that will become the thermal adhesive resin layer 23 (extrusion lamination method).

[0035] The laminate sheet 20 may have other layers in addition to the base material layer 21 and the thermal adhesive resin layer 23. For example, the laminate sheet 20 may have a metal layer 22 between the base material layer 21 and the thermal adhesive resin layer 23, as shown in FIG.

[0036] The metal layer 22 is laminated on the base layer 21. The metal layer 22 imparts barrier properties to the laminated sheet 20 (lid 10). The metal layer 22 is, for example, a metal foil, and an example of the metal foil is aluminum foil. The thickness of the metal layer 22 is, for example, 3 μm or more and 30 μm or less, and may be 5 μm or more and 20 μm or less.

[0037] As shown in Fig. 3, the metal layer 22 may be bonded to the base layer 21 via a thermoplastic resin layer 24. In this case, the thermoplastic resin layer 24 functions as an adhesive layer. Examples of the thermoplastic resin layer 24 include linear low-density polyethylene (LLDPE), polyurethane, polypropylene, ethylene-unsaturated ester copolymer resin, and polyester copolymer resin. The thickness of the thermoplastic resin layer 24 is, for example, 3 µm to 40 µm, and may be 5 µm to 35 µm.

[0038] In a configuration in which the metal layer 22 is bonded to the base layer 21 via the thermoplastic resin layer 24, the base layer 21 and the metal layer 22 can be laminated by a method (extrusion lamination method) in which a resin to become the thermoplastic resin layer 24 is extruded from a T-die or the like between the base layer 21 and the metal layer 22. The base layer 21 and the metal layer 22 may be bonded using, for example, an adhesive used in this technical field.

[0039] The laminated sheet 20 can be produced by, for example, an extrusion lamination method, a dry lamination method, or the like.

[0040] The laminated sheet 20 is configured to satisfy the following condition I. [Condition I] The weight per unit area of ​​the base layer 21 is defined as G1 [g / m 2 ], and the weight per unit area of ​​the laminated sheet 20 is G2 [g / m 2 ], and the weight per unit area of ​​the metal layer 22 is G3 [g / m 2 ], then G1, G2, and G3 satisfy formula (A). In this embodiment, G1 is the basis weight of the paper that constitutes the base material layer 21. G2 corresponds to the weight per unit area of ​​the lid body 10. 0.75≦{G1+(2×G3)} / G2···(A) The above G1 can be set to a value when the moisture content of the paper constituting the base layer 21 is 3% or more and 7% or less, for example.

[0041] The laminate sheet 20 may be configured so that the above G1, G2, and G3 satisfy the following formula (B). 0.9≦{G1+(2×G3)} / G2···(B)

[0042] The upper limit values ​​of the formula (A) and the formula (B) may be, for example, 1.3 or 1.1.

[0043] When the laminate sheet 20 does not have the metal layer 22, G3 = 0 in formula (A). Therefore, when the laminate sheet 20 does not have the metal layer 22, condition I corresponds to the following condition II. [Condition II] The above G1 and G2 satisfy the formula (A1). 0.75≦G1 / G2 (A1)

[0044] When the laminate sheet 20 does not have the metal layer 22, the laminate sheet 20 may be configured so that the above G1 and G2 satisfy the following formula (B1). 0.9≦G1 / G2 (B1)

[0045] The layer structure of the laminated sheet 20 (layer structure of the lid 10) is set to satisfy the above condition I (or condition II). The layer structure includes the number of layers, the material of each layer, the thickness, and the like.

[0046] Next, the function and effect of the lid 10 will be described with reference to Figures 1, 4 and 5. As shown in Figure 1, the lid 10 is attached to the opening edge 2b of the container 2 containing the instant food 1. In this way, the container 2 is closed by the lid 10. The lid 10 can be attached to the opening edge 2b by heat sealing.

[0047] When a user eats the instant food 1 in the container 2, the user peels about half of the lid 10 off the container 2 using at least one of the first tab 121 and the second tab 122, as shown in FIG. 4. Using the opening thus created, the user pours hot water 3 into the container 2 from a hot water supply unit (such as a kettle or pot). Then, as shown in FIG. 5, the user returns the portion of the lid 10 that was peeled off from the container 2 to the container 2, thereby reclosing the opening for pouring the hot water 3. In this case, the first tab 121 is secured to the container 2 by folding it along the outer edge of the opening end 2b. Similarly, the second tab 122 is secured to the container 2 by folding it along the outer edge of the opening end 2b. As a result, the portion of the lid 10 that was peeled off from the container 2 is secured to the container 2 at two points, and the opening formed for pouring the hot water 3 is closed. After a certain period of time (for example, three minutes) has elapsed in this state, the user separates the lid body 10 from the container 2.

[0048] Because the laminated sheet 20 constituting the lid 10 satisfies the above condition I (or condition II), when the container 2 is resealed with the lid 10, the lid 10 is unlikely to peel off (i.e., the container 2 is unlikely to be opened). That is, the configuration of the lid 10 itself allows the container 2 to be resealed stably and easily without the need for a separate component such as adhesive tape. Since adhesive tape is not required in this way, the effort required to prepare adhesive tape is also eliminated. Since adhesive tape is not required, resource consumption is reduced, and the configuration of the lid 10 contributes to reducing the environmental impact. Because the container 2 can be resealed stably with the lid 10, steam leakage is unlikely to occur. As a result, a decrease in water temperature and a decrease in the amount of water due to steam leakage can be suppressed, and the instant food 1 can be kept warm in the boiling water 3 appropriately.

[0049] In a configuration in which the laminated sheet 20 constituting the lid 10 satisfies the above formula (A1) or formula (B1), when the container 2 is resealed with the lid 10, the lid 10 is likely to be prevented from being turned over by the influence of hot water poured into the container 2. In other words, the container 2 can be resealed more stably with the lid 10.

[0050] Since the lid body 10 has two tabs 12 (first tab 121 and second tab 122), when the container 2 is resealed with the lid body 10, the lid body 10 can be fastened at two locations. This further prevents the container 2 from being partially opened due to the lid body 10 being turned over by the hot water poured into the container 2.

[0051] In a configuration in which the base material layer 21 of the lid body 10 is made of paper, the environmental load can be reduced compared to when, for example, a plastic film is used for the base material layer.

[0052] (Second embodiment) FIG. 6 is a plan view of a lid body 10A according to a second embodiment. The lid body 10A can be applied to the container 2 shown in FIG. 1 in place of the lid body 10. Like the lid body 10, the lid body 10A has a main body 11 and at least two gripping pieces 12. In the second embodiment, a configuration in which the lid body 10A has two gripping pieces 12 will also be described. When distinguishing between the two gripping pieces 12, the two gripping pieces 12 will be referred to as a first gripping piece 121 and a second gripping piece 122, as in the first embodiment.

[0053] The shapes and relative positions of the main body 11, first gripping piece 121, and second gripping piece 122 of the lid body 10A are the same as those of the lid body 10. Therefore, in the second embodiment, the main body 11 is also circular with a center 11a and a diameter D. The first gripping piece 121 and the second gripping piece 122 are tongue-shaped or approximately triangular gripping pieces with a first apex 121a and a second apex 122a. The first gripping piece 121 and the second gripping piece 122 are arranged so that the angle θ between the imaginary line 14a and the imaginary line 14b is within a predetermined angle range, as in the first embodiment. The definitions of the imaginary line 14a and the imaginary line 14b are the same as in the first embodiment.

[0054] As shown in Fig. 7, the lid body 10A is formed of a laminated sheet 30 including a paper substrate layer 31 and a thermal adhesive resin layer 33. Fig. 7 is a schematic diagram for explaining the layer structure of the laminated sheet 30 that forms the lid body 10A. As shown in Fig. 7, the laminated sheet 30 may have a metal layer 32 and a thermoplastic resin layer 34.

[0055] The base material layer 31, the metal layer 32, the thermal adhesive resin layer 33, and the thermoplastic resin layer 34 correspond to the base material layer 21, the metal layer 22, the thermal adhesive resin layer 23, and the thermoplastic resin layer 24 described in the first embodiment. The arrangement and configuration examples (including examples of materials, examples of thicknesses, etc.) of the base material layer 31, the metal layer 32, the thermal adhesive resin layer 33, and the thermoplastic resin layer 34 are the same as those of the corresponding layers in the first embodiment, and therefore descriptions thereof will be omitted.

[0056] The laminated sheet 30 is configured to satisfy the following condition III. [Condition III] If a rectangular sample piece having the same layer structure as the laminated sheet 30, with a short side length of 15 mm and a long side length of 100 mm, is folded at the center in the longitudinal direction so that the thermal adhesive resin layer 33 is in contact with the sample piece, and the restoration angle (or opening angle) of the sample piece at the stage when the movement associated with the restoration stops is defined as the dead hold value of the laminated sheet 30, the dead hold value is 5 degrees or more and 25 degrees or less.

[0057] The above condition III will be further explained with reference to Figures 8 and 9. Figure 8 is a plan view of the sample piece S used to measure the deadhold value, and Figure 9 is a diagram explaining the method for measuring the deadhold value.

[0058] As shown in Fig. 8, a sample piece S having a length of 15 mm in the short side direction and a length of 100 mm in the long side direction is prepared. The layer structure of the sample piece S is the same as that of the laminated sheet 30. The sample piece S can be prepared by cutting it out from the laminated sheet 30.

[0059] The sample piece S is folded in half at the center in the longitudinal direction as shown in FIG. 9. At this time, the sample piece S is folded so that the thermal adhesive resin layer 33 is on the inside (in other words, so that they face each other). After folding the sample piece S in this way, the restoration angle α (degrees) of the sample piece S is measured at the stage when the movement associated with the restoration of the folded area of ​​the sample piece S stops, and this restoration angle α is defined as the dead hold value. Condition III specifies that the restoration angle α is 5 degrees or more and 25 degrees or less. The meaning of "stop" above includes cases where the angle fluctuates by 3 degrees or less for 3 seconds.

[0060] The dead hold value (restoration angle α) may be 10 degrees or more and 20 degrees or less.

[0061] If there is a difference in the deadhold value between the MD direction (machine direction) and the TD direction (width direction, perpendicular to the MD direction) of the laminated sheet 30, the average value of the deadhold values ​​in the MD direction and the TD direction may be adopted as the deadhold value of the laminated sheet 30.

[0062] When lid body 10A made of laminated sheet 30 is applied to container 2 (see FIG. 1), the method of use of lid body 10A is the same as that of lid body 10. Therefore, when resealing container 2 with lid body 10A, lid body 30A can be fastened to container 2 by bending tab 12. Therefore, container 2 can be easily resealed with lid body 10A.

[0063] In the lid body 10A, the deadhold value (restoration angle α) of the laminated sheet 30 is between 5 degrees and 25 degrees. Therefore, when the first gripping piece 121 and the second gripping piece 122 are bent, the bent state is easily maintained. Therefore, the lid body 10A can be maintained attached to the container 2, allowing the container 2 to be resealed stably. This prevents the lid body 10A from being partially opened due to, for example, the lifting up of the lid body 10A. Therefore, the container 2 can be resealed using the lid body 10A itself, without the need for additional components such as adhesive tape. This reduces resource consumption, and the configuration of the lid body 10A also contributes to reducing environmental impact. Because the lid body 10A is prevented from being partially opened due to, for example, the lifting up of the lid body 10A, the temperature of the boiling water 3 poured into the container 2 is less likely to decrease, and the amount of boiling water 3 is less likely to decrease. As a result, the instant food 1 can be kept warm appropriately.

[0064] When the deadhold value (restoration angle α) is large, the shape retention effect is reduced, but wrinkle resistance (appearance) is improved. When the deadhold value (restoration angle α) is between 10 degrees and 20 degrees, the folded state of the tab 12 can be maintained while ensuring aesthetic appeal.

[0065] Since lid body 10A has two gripping pieces (first gripping piece 121 and second gripping piece 122), when resealing container 2 with lid body 10A, lid body 10 can be fastened at two locations. Therefore, container 2 can be resealed more stably with lid body 10A.

[0066] In a configuration in which the base material layer 21 of the lid body 10A is made of paper, the environmental load can be reduced compared to when, for example, a plastic film is used for the base material layer, as in the first embodiment.

[0067] Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and is intended to include the scope indicated by the claims, and to include all modifications within the meaning and scope equivalent to the claims.

[0068] The number of gripping pieces may be three or more.

[0069] The above-described embodiments and modifications may be combined as appropriate without departing from the spirit of the present invention. For example, the laminated sheet (or the lid) of the first embodiment may be configured to further satisfy condition III described in the second embodiment. [Example]

[0070] The present invention will be described in more detail by the following examples, but the present invention is not limited to these examples.

[0071] (1) Description of Examples 1 to 8 and Comparative Examples 1 and 2 Example 1 In Example 1, a laminate sheet having the following layer structure was prepared. In the following layer structure, when a lid constructed using the laminate sheet is attached to a container, the thermal adhesive resin layer is the layer located closest to the container. The same applies to the layer structures in Examples 2 to 8 and Comparative Examples 1 and 2 described below. Base material layer / thermoplastic resin layer / metal layer / thermal adhesive resin layer

[0072] The base layer has a basis weight of 79.1 g / m 2 The weight G1 per unit area of ​​the base layer was 79.1 g / m 2 It was. The thermoplastic resin layer was a layer formed by extruding polyethylene (PE) (LDPE for extrusion lamination) between the substrate layer and the metal layer to a thickness of 13 μm. That is, the thermoplastic resin layer was a polyethylene layer with a thickness of 13 μm formed by the extrusion lamination method. The metal layer was an aluminum foil (alloy aluminum) with a thickness of 6 μm. The weight per unit area of ​​the metal layer G3 was 16.2 g / m 2 It was. The thermal adhesive resin layer was formed by extruding polyethylene (PE) onto the metal layer to a thickness of 40 μm. That is, the thermal adhesive resin layer was a 40 μm thick polyethylene layer formed by extrusion lamination. The polyethylene used for the thermal adhesive resin layer was the same as the polyethylene used for the thermoplastic resin layer.

[0073] The weight of the laminated sheet was measured using an electronic balance (model number: UW4200H). The weight per unit area of ​​the laminated sheet, G2, obtained by dividing the weight measurement result by the area of ​​the laminated sheet (area when viewed from the thickness direction), was 145 g / m 2 It was.

[0074] The laminated sheet was processed into the shape shown in FIG. 2 or FIG. 6 to obtain a lid. In the lid of Example 1, the main body (corresponding to main body 11 in FIG. 2 or FIG. 6) was circular, and the diameter of the main body (corresponding to diameter D in FIG. 2 or FIG. 6) was 96.5 mm. The lid had a first gripping piece and a second gripping piece extending outward from the main body. The first gripping piece and the second gripping piece correspond to first gripping piece 121 and second gripping piece 122 shown in FIG. 2 or FIG. 6. The first gripping piece and the second gripping piece were tongue-shaped with a first apex and a second apex. In the lid of Example 1, the maximum length (corresponding to length L in FIG. 2 or FIG. 6) of the lid was 106.5 mm. Furthermore, the angle θ (central angle) between imaginary lines 14a and 14b shown in FIG. 2 or FIG. 6 was 90 degrees.

[0075] Example 2 In Example 2, a laminate sheet having the following layer structure was prepared. Base material layer / thermoplastic resin layer / metal layer / thermal adhesive resin layer

[0076] The substrate layer was the same as the substrate layer in Example 1. That is, the substrate layer had a basis weight of 79.1 g / m 2 The weight G1 per unit area of ​​the base layer was the same as the basis weight, 79.1 g / m 2 It was. The thermoplastic resin layer was the same as the thermoplastic resin layer in Example 1, except that it had a thickness of 15 μm. That is, the thermoplastic resin layer was a polyethylene layer having a thickness of 15 μm formed by extrusion lamination. The metal layer was an aluminum foil (alloy aluminum) with a thickness of 7 μm. The weight per unit area of ​​the metal layer G3 was 18.9 g / m 2 It was. The thermal adhesive resin layer was the same as the thermal adhesive resin layer in Example 1, except that it had a thickness of 35 μm. That is, the thermal adhesive resin layer was a polyethylene layer having a thickness of 35 μm formed by extrusion lamination.

[0077] The weight G2 per unit area of ​​the laminated sheet calculated in the same manner as in Example 1 was 141 g / m 2 It was.

[0078] The laminated sheet prepared in Example 2 was used to produce a lid having the same planar shape as in Example 1. That is, the lid of Example 2 had a main body, first gripping piece, and second gripping piece of the same size as in Example 1, and the positional relationship between the first gripping piece and the second gripping piece was also the same as in Example 1.

[0079] Example 3 In Example 3, a laminate sheet having the following layer structure was prepared. Base layer / thermoplastic resin layer / intermediate resin layer / metal layer / thermal adhesive resin layer

[0080] The base layer has a basis weight of 127.9 g / m 2 The weight G1 per unit area of ​​the base layer was the same as the basis weight, 127.9 g / m 2 It was. The thermoplastic resin layer was the same as the thermoplastic resin layer in Example 1 except that it had a thickness of 20 μm. That is, the thermoplastic resin layer was a polyethylene layer having a thickness of 20 μm formed by extrusion lamination. In Example 3, the polyethylene forming the thermoplastic resin layer was extruded between the base layer and the intermediate resin layer. The intermediate resin layer was a polyethylene terephthalate film (biaxially stretched polyethylene terephthalate film) with a thickness of 12 μm. The metal layer was the same as that in Example 2. That is, the metal layer was an aluminum foil with a thickness of 7 μm. Therefore, the weight G3 per unit area of ​​the metal layer was also the same as that in Example 2. The metal layer was bonded to the intermediate resin layer using adhesive g. The adhesive g was a urethane-based adhesive (two-component curing polyester polyurethane adhesive). The thermal adhesive resin layer was a polyethylene film (easy peel film for PP containers) with a thickness of 30 μm. The thermal adhesive resin layer was attached to the metal layer using adhesive g.

[0081] The weight G2 per unit area of ​​the laminated sheet calculated in the same manner as in Example 1 was 210 g / m 2 It was.

[0082] The laminated sheet prepared in Example 3 was used to produce a lid having the same planar shape as in Example 1. That is, the lid of Example 3 had a main body, first gripping piece, and second gripping piece of the same size as in Example 1, and the positional relationship between the first gripping piece and the second gripping piece was also the same as in Example 1.

[0083] Example 4 In Example 4, a laminate sheet having the following layer structure was prepared. Outermost resin layer / base material layer / thermoplastic resin layer / metal layer / thermal adhesive resin layer

[0084] The outermost resin layer was a polyethylene terephthalate film (biaxially stretched polyethylene terephthalate film) having a thickness of 12 μm. The base layer has a basis weight of 104.7 g / m 2 The weight G1 per unit area of ​​the base layer was the same as the basis weight, 104.7 g / m 2 The substrate layer was attached to the outermost resin layer using adhesive g. The thermoplastic resin layer was the same as the thermoplastic resin layer in Example 2. That is, the thermoplastic resin layer was a polyethylene layer having a thickness of 15 μm formed by extrusion lamination. The metal layer was an aluminum foil (alloy aluminum) with a thickness of 15 μm. The weight per unit area of ​​the metal layer G3 was 40.5 g / m 2 It was. The thermal adhesive resin layer was the same as the thermal adhesive resin layer in Example 1, except that it had a thickness of 25 μm. That is, the thermal adhesive resin layer was a polyethylene layer having a thickness of 25 μm formed by extrusion lamination.

[0085] The weight G2 per unit area of ​​the laminated sheet calculated in the same manner as in Example 1 was 200 g / m 2 It was.

[0086] The laminated sheet prepared in Example 4 was used to produce a lid having the same planar shape as in Example 1. That is, the lid of Example 4 had a main body, first gripping piece, and second gripping piece of the same size as in Example 1, and the positional relationship between the first gripping piece and the second gripping piece was also the same as in Example 1.

[0087] Example 5 In Example 5, a laminate sheet having the following layer structure was prepared. Base material layer / thermoplastic resin layer / metal layer / thermal adhesive resin layer

[0088] The substrate layer was the same as the substrate layer in Example 3. That is, the substrate layer had a basis weight of 127.9 g / m 2 Therefore, the weight G1 per unit area of ​​the base layer was the same as in Example 3. The thermoplastic resin layer was the same as the thermoplastic resin layer in Example 3. That is, the thermoplastic resin layer was a polyethylene layer having a thickness of 20 μm formed by extrusion lamination. The metal layer was an aluminum foil (alloy aluminum) with a thickness of 12 μm. The weight per unit area of ​​the metal layer G3 was 32.4 g / m 2 It was. The thermal adhesive resin layer was the same as the thermal adhesive resin layer in Example 1, except that it had a thickness of 20 μm. That is, the thermal adhesive resin layer was a polyethylene layer having a thickness of 20 μm formed by extrusion lamination.

[0089] The weight G2 per unit area of ​​the laminated sheet calculated in the same manner as in Example 1 was 200 g / m 2 It was.

[0090] The laminated sheet prepared in Example 5 was used to produce a lid having the same planar shape as in Example 1. That is, the lid of Example 5 had a main body, first gripping piece, and second gripping piece of the same size as in Example 1, and the positional relationship between the first gripping piece and the second gripping piece was also the same as in Example 1.

[0091] Example 6 In Example 6, a laminate sheet having the following layer structure was prepared. Base material layer / Thermoplastic resin layer / Intermediate resin layer / Thermoadhesive resin layer

[0092] The base layer has a basis weight of 150 g / m 2 The weight G1 per unit area of ​​the base layer was the same as the basis weight, 150 g / m 2 It was. The thermoplastic resin layer was the same as the thermoplastic resin layer in Example 5. That is, the thermoplastic resin layer was a polyethylene layer having a thickness of 20 μm formed by extrusion lamination. In Example 6, the polyethylene forming the thermoplastic resin layer was extruded between the substrate layer and the intermediate resin layer. The intermediate resin layer was a polyethylene terephthalate film (biaxially stretched polyethylene terephthalate film) with a thickness of 9 μm. The thermal adhesive resin layer was the same as the thermal adhesive resin layer in Example 5. That is, the thermal adhesive resin layer was a polyethylene layer having a thickness of 20 μm formed by extrusion lamination.

[0093] The weight G2 per unit area of ​​the laminated sheet calculated in the same manner as in Example 1 was 200 g / m 2It was.

[0094] The laminated sheet prepared in Example 6 was used to produce a lid having the same planar shape as in Example 1. That is, the lid of Example 6 had a main body, first gripping piece, and second gripping piece of the same size as in Example 1, and the positional relationship between the first gripping piece and the second gripping piece was also the same as in Example 1.

[0095] Example 7 In Example 7, the same laminate sheet as in Example 1 was prepared. Therefore, the weight G1 per unit area of ​​the base layer and the weight G2 per unit area of ​​the laminate sheet were the same as in Example 1.

[0096] A lid was produced using the laminate sheet prepared in Example 7. The lid of Example 7 had the same shape in plan view as Example 1, except that the angle θ (central angle) between imaginary lines 14a and 14b shown in Figure 2 or 6 was 120 degrees. That is, the lid of Example 7 had a main body, first gripping piece, and second gripping piece of the same size as those in Example 1, and the first gripping piece and second gripping piece were arranged so that the angle θ (central angle) was 120 degrees.

[0097] Example 8 In Example 8, the same laminate sheet as in Example 1 was prepared. Therefore, the weight G1 per unit area of ​​the base layer and the weight G2 per unit area of ​​the laminate sheet were the same as in Example 1.

[0098] A lid was fabricated using the laminated sheet prepared in Example 8. The lid of Example 8 differed from Example 1 mainly in that the diameter of the main body was 180 mm. The lid of Example 8 had a circular main body, a first gripping portion, and a second gripping portion, similar to Example 1. In Example 8, the diameter of the main body (corresponding to diameter D in FIG. 2 or FIG. 6) was 180 mm. The maximum length of the lid of Example 8 (corresponding to length L in FIG. 2 or FIG. 6) was 190 mm. In the lid of Example 9, the angle θ (central angle) between imaginary lines 14a and 14b shown in FIG. 2 or FIG. 6 was 90 degrees, similar to Example 1.

[0099] (Comparative Example 1) In Comparative Example 1, a laminate sheet having the following layer structure was prepared. Base material layer / thermoplastic resin layer / metal layer / thermal adhesive resin layer

[0100] The substrate layer was the same as the substrate layer in Example 1. That is, the substrate layer had a basis weight of 79.1 g / m 2 Therefore, the weight G1 per unit area of ​​the base layer was the same as in Example 1. The thermoplastic resin layer was the same as the thermoplastic resin layer in Example 1, except that it had a thickness of 17 μm. That is, the thermoplastic resin layer was a polyethylene layer having a thickness of 17 μm formed by extrusion lamination. The metal layer was the same as that in Example 1. That is, the metal layer was an aluminum foil with a thickness of 6 μm. Therefore, the weight G3 per unit area of ​​the metal layer was also the same as that in Example 1. The thermal adhesive resin layer was the same as the thermal adhesive resin layer in Example 1, except that it had a thickness of 45 μm. That is, the thermal adhesive resin layer was a polyethylene layer having a thickness of 45 μm formed by extrusion lamination.

[0101] The weight G2 per unit area of ​​the laminated sheet calculated in the same manner as in Example 1 was 155 g / m 2 It was.

[0102] The laminated sheet prepared in Comparative Example 1 was used to produce a lid having the same planar shape as in Example 1. That is, the lid of Comparative Example 1 had a main body, first gripping piece, and second gripping piece of the same size as in Example 1, and the positional relationship between the first gripping piece and the second gripping piece was also the same as in Example 1.

[0103] (Comparative Example 2) In Comparative Example 2, a laminate sheet having the following layer structure was prepared. Outermost resin layer / base material layer / thermoplastic resin layer / intermediate resin layer / thermal adhesive resin layer

[0104] The outermost resin layer was the same as the outermost resin layer in Example 4. That is, the outermost resin layer was a polyethylene terephthalate film with a thickness of 12 μm. The substrate layer was the same as the substrate layer in Examples 3 and 5. That is, the substrate layer had a basis weight of 127.9 g / m 2 The base material layer was a single-sided art paper of 1000×1000 mm. Therefore, the weight G3 per unit area of ​​the base material layer was the same as in Examples 3 and 5. The base material layer was bonded to the outermost resin layer using adhesive g, as in Example 4. The thermoplastic resin layer was the same as the thermoplastic resin layer in Examples 3 and 5. That is, the thermoplastic resin layer was a polyethylene layer having a thickness of 20 μm formed by extrusion lamination. In Comparative Example 2, too, the polyethylene forming the thermoplastic resin layer was extruded between the base layer and the intermediate resin layer. The intermediate resin layer was the same as the intermediate resin layer in Example 3. That is, the intermediate resin layer was a polyethylene terephthalate film having a thickness of 12 μm. The thermal adhesive resin layer was the same as that of Example 3. That is, the thermal adhesive resin layer was a polyethylene film with a thickness of 30 μm. The thermal adhesive resin layer was attached to the intermediate resin layer using adhesive g, as in Example 3.

[0105] The weight G2 per unit area of ​​the laminated sheet calculated in the same manner as in Example 1 was 210 g / m 2 It was.

[0106] The laminated sheet prepared in Comparative Example 2 was used to produce a lid having the same planar shape as in Example 1. That is, the lid of Comparative Example 2 had a main body, first gripping piece, and second gripping piece of the same size as in Example 1, and the positional relationship between the first gripping piece and the second gripping piece was also the same as in Example 1.

[0107] G, represented by the following formula (C), was calculated based on the weights G1, G2, and G3 per unit area shown in Examples 1 to 8 and Comparative Examples 1 and 2. The calculation results are shown in Table 1. G = {G1 + (2 × G3)} / G2 (C) The laminated sheets of Example 6 and Comparative Example 2 did not have a metal layer, so G was calculated assuming G3=0.

[0108] <Resealability evaluation test 1> A test was carried out to evaluate the resealability of the containers using the lids in Examples 1 to 8 and Comparative Examples 1 and 2. The test method was as follows.

[0109] (Test Method) Ten samples were prepared by heat-sealing the prepared lids to containers as shown in Figure 1. The containers used were upright containers commonly used for commercial instant noodles. The diameter of the open end of the container was 96.5 mm.

[0110] Half of the sample lid was peeled off from the container, opening the container halfway. Then, 300 ml of boiling water was poured through the opening. The portion of the lid that had been peeled off was then returned to the container, and the lid was secured to the container by bending the tab on the lid along the outer edge of the open end of the container. The resealed state was observed for three minutes. The observation results were evaluated according to the following criteria. In the resealability evaluation tests for Examples 1 to 8 and Comparative Examples 1 and 2, the containers were resealed with the lid by bending the first tab and second tab along the outer edge of the open end of the container. For all 10 samples, if the container was not opened (i.e., the lid was not turned over), it was evaluated as "A", and otherwise it was evaluated as "B".

[0111] (Evaluation results) The results of the resealability evaluation test 1 for the lids of Examples 1 to 8 and the lids of Comparative Examples 1 and 2 are shown in Tables 1 and 2, respectively.

[0112] [Table 1] [Table 2]

[0113] As shown in Table 1, the resealability evaluation results for Examples 1 to 8 were "A." In contrast, as shown in Table 2, the resealability evaluation results for Comparative Examples 1 and 2 were both "B." Therefore, it can be understood that when G represented by formula (C) is 0.75 or more, the container can be stably resealed with the lid without being opened. G represented by formula (C) corresponds to the right side of formula (A). When G3 = 0, as in Example 6, G represented by formula (C) corresponds to the right side of formula (A1). Therefore, when the laminated sheet constituting the lid (or the lid) satisfies condition I or condition II (when G3 = 0 in condition I), the container will not be opened when resealed with the lid. In other words, the container can be stably resealed with the lid. Although not shown in the table, based on observations when resealability evaluation test 1 was performed, Examples 4 and 5 were able to reseal more stably. Therefore, when G in Table 1 above is 0.9 or more (in other words, when condition (B) or condition (B1) is satisfied), the resealing is more stable and easier.

[0114] (2) Description of Examples 1a, 2a, 3a, 4a, 5a, 6a, 7a, and 8a and Comparative Examples 1a and 2a In Example 1a, the same laminate sheet as in Example 1 was prepared, and the same lid as in Example 1 was produced. In Example 2a, the same laminate sheet as in Example 2 was prepared, and the same lid as in Example 2 was produced. In Example 3a, the same laminate sheet as in Example 3 was prepared, and the same lid as in Example 3 was produced. In Example 4a, the same laminate sheet as in Example 4 was prepared, and the same lid as in Example 4 was produced. In Example 5a, the same laminate sheet as in Example 5 was prepared, and the same lid as in Example 5 was produced. In Example 6a, the same laminate sheet as in Example 6 was prepared, and the same lid as in Example 6 was produced. In Example 7a, the same laminate sheet as in Example 7 was prepared, and the same lid as in Example 7 was produced. In Example 8a, the same laminate sheet as in Example 8 was prepared, and the same lid as in Example 8 was produced.

[0115] In Comparative Example 1a, the same laminate sheet as in Comparative Example 1 was prepared, and the same lid as in Comparative Example 1 was produced. Similarly, in Comparative Example 2a, the same laminate sheet as in Comparative Example 2 was prepared, and the same lid as in Comparative Example 2 was produced.

[0116] <Deadhold value measurement> The dead-hold values ​​of the laminate sheets prepared in Examples 1a to 8a and Comparative Examples 1a and 2a were measured according to the method described in the second embodiment with reference to FIGS. 8 and 9. For the measurement, sample pieces S (see FIG. 8) were cut out along the MD and TD directions from each of the laminate sheets prepared in Examples 1a to 8a and Comparative Examples 1a and 2a, and the dead-hold values ​​(restoration angle α shown in FIG. 9) in the MD and TD directions of each laminate sheet were obtained. In the measurement, the time from when the sample piece S was folded as shown by the solid line in FIG. 9 until the sample piece S opened and stopped was approximately 1 minute. That is, in the measurement of the dead-hold value, the restoration angle α was measured approximately 1 minute after the sample piece S was folded. The measurement results are shown in Table 2. As shown in Tables 3 and 4, the average dead-hold values ​​in the MD and TD directions were calculated and used as the dead-hold value of the laminate sheet.

[0117] <Resealability evaluation test 2> A resealability evaluation test was conducted on containers using the lids of Examples 1a to 8a and Comparative Examples 1a and 2a. The test method and evaluation criteria were the same as in Resealability Evaluation Test 1. The evaluation results of Examples 1a to 8a were as shown in Table 3. The evaluation results of Comparative Examples 1a and 2a were as shown in Table 4. [Table 3] [Table 4]

[0118] As shown in Table 3, Examples 1a to 8a received an "A" for the resealability evaluation. In contrast, as shown in Table 4, Comparative Examples 1a and 2a both received a "B" for the resealability evaluation. Therefore, it can be understood that when the deadhold value (average value in the MD and TD directions) of the laminated sheet (or lid) is 5 degrees or more and 25 degrees or less, i.e., when the laminated sheet (lid) satisfies the above-mentioned condition III, the container can be resealed stably with the lid without being opened. Although not shown in the table, based on observations when resealability evaluation test 2 was conducted, Examples 4a and 5a provided more stable resealability. Therefore, when the deadhold value is 10 degrees or more and 20 degrees or less, resealability is more stable. [Explanation of symbols]

[0119] 1...instant food, 2...container, 2a...opening, 2b...opening edge, 3...hot water (hot water), 10...lid, 11...main body, 11a...center, 12...grip, 121...first gripping piece, 121a...first top, 122...second gripping piece, 122a...second top, 14a, 14b...imaginary straight line, 20...laminated sheet, 21...base material layer, 22...metal layer, 23...thermoadhesive resin layer, 24...thermoplastic resin layer.

Claims

1. A lid for sealing an opening of a container for storing instant food that is cooked by pouring hot water over it, a main body portion attached to the open end of the container; At least two gripping pieces extending outward from the main body; and When the main body portion is virtually divided into two equal regions as viewed in a thickness direction, the at least two gripping pieces are disposed on an outer circumferential edge of one of the two regions, the main body and the at least two gripping pieces are formed of a laminated sheet, The laminate sheet is a paper substrate layer; a thermal adhesive resin layer provided on the base material layer; and When the weight per unit area of ​​the base material layer is G1 and the weight per unit area of ​​the lid body is G2, G1 and G2 satisfy the formula (1), Lid body. 0.75≦G1 / G2...(1)

2. The G1 and the G2 satisfy formula (2), The lid according to claim 1 . 0.9≦G1 / G2...(2)

3. A lid for sealing an opening of a container for storing instant food that is cooked by pouring hot water over it, a main body portion attached to the open end of the container; At least two gripping pieces extending outward from the main body; and When the main body portion is virtually divided into two equal regions as viewed in a thickness direction, the at least two gripping pieces are disposed on an outer circumferential edge of one of the two regions, the main body and the at least two gripping pieces are formed of a laminated sheet, The laminate sheet is a paper substrate layer; a thermal adhesive resin layer provided on the base material layer; a metal layer disposed between the base material layer and the thermal adhesive resin layer; and When the weight per unit area of ​​the base layer is G1, the weight per unit area of ​​the lid body is G2, and the weight per unit area of ​​the metal layer is G3, G1, G2, and G3 satisfy formula (3), The lid according to claim 1 . 0.75≦{G1+(2×G3)} / G2...(3)

4. The G1, the G2, and the G3 satisfy formula (4), The lid according to claim 3. 0.9≦{G1+(2×G3)} / G2...(4)

5. A lid for sealing an opening of a container for storing instant food that is cooked by pouring hot water over it, a main body portion attached to the open end of the container; At least two gripping pieces extending outward from the main body; and When the main body portion is virtually divided into two equal regions as viewed in a thickness direction, the at least two gripping pieces are disposed on an outer circumferential edge of one of the two regions, the main body and the at least two gripping pieces are formed of a laminated sheet, The laminate sheet is a paper substrate layer; a thermal adhesive resin layer provided on the base material layer; and The laminate sheet has a rectangular sample piece having the same layer structure as the laminate sheet, the sample piece having a short side length of 15 mm and a long side length of 100 mm, and is folded at the center in the longitudinal direction so that the thermal adhesive resin layer is in contact with the sample piece. When the dead hold value of the laminate sheet is defined as the restoration angle of the sample piece at the stage when the movement associated with restoration stops after folding the sample piece at the center in the longitudinal direction so that the thermal adhesive resin layer is in contact with the sample piece, the dead hold value of the laminate sheet is 5 degrees or more and 25 degrees or less. Lid body.

6. The dead hold value is 10 degrees or more and 20 degrees or less. The lid according to claim 5.

7. The deadhold value is an average value of the deadhold value in the MD direction and the deadhold value in the TD direction of the laminated sheet. The lid according to claim 5 or 6.

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