Cap, and packaging and granular material container employing the same

Abstract

The present application relates to the field of packaging products, and relates to a cover, and a packaging and a granular material container using the same, comprising a sheet-shaped body, a container connecting part is arranged on the periphery of the body, and the container connecting part is used for sealingly connecting a container wall; the container connecting part is connected to a blocking sheet through a cover connecting part, and the blocking sheet is integrally formed with the container connecting part and the cover connecting part; the blocking sheet is provided with a through hole communicating with the upper and lower parts of the body, and the through hole is used for pouring out the granular material. The granular material can be poured out through the cover, that is, the packaging using the cover can be directly taken as a container for pouring and storing the granular material after the sealing structure is removed; and through the distribution of the through holes on the blocking sheet of the cover, the user can easily control the amount of the granular material poured out, thereby greatly facilitating the user, avoiding the transfer of the original packaging to other special seasoning bottles, and simultaneously avoiding the storage problem of the original unpacked and sealed original packaging.

Description

TECHNICAL FIELD

[0001] The present application relates to a cover, and a packaging and a granular material container using the same, and belongs to the technical field of packaging products. BACKGROUND

[0002] In the existing packaging material, a separate cover is widely used to connect with the wall of the packaging to achieve the sealing of the packaging that needs to be sealed. The cover is often a simple single component, and its function is very single in use. When facing a more complex scene, it cannot meet the problems of each stage. In real life, there are granular materials that are easy to be damp. When the sealing cover is removed, a relatively large opening will appear, which is not conducive to some situations where only a small amount is needed each time. In daily life, taking monosodium glutamate as an example, there are often sealed packaging materials for monosodium glutamate, such as large plastic sealed bags or sealed cylinders. When these packaging materials are directly poured, it is difficult to control the amount of pouring, and it is also difficult to achieve good dust prevention. In order to better adjust the amount of pouring each time, it is necessary to sub-pack into other special seasoning bottles with multiple small holes. This involves multiple transfers, and because the seasoning bottle manufacturers and the monosodium glutamate manufacturers belong to different production systems, they cannot be coordinated. Often, the volume of the seasoning bottle is much smaller than the volume of the original packaging material, causing the original packaging to be damaged. Because it cannot be well sealed, the remaining material will be affected by moisture, pollution, etc. A cover assembly that can meet the needs of the production link, meet the sealing storage requirements before use, meet the user's quantitative pouring of granular materials during use, and temporarily seal or avoid the impact on use when needed is urgently needed. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the problem that the existing granular material packaging materials and actual use scenarios are not unified. The present application discloses a cover for pouring granular material, a packaging and a sealed container using the same. The packaging problem of granular material manufacturers can be solved, and the packaging structure can be directly used in the user's use scenario, so that a special seasoning bottle does not need to be used.

[0004] The present application first proposes a cover for pouring granular material, which comprises a thin sheet-shaped body. A container connecting portion is provided on the periphery of the body, and the container connecting portion is used for sealing connection with the container wall. The container connecting portion is connected to a blocking sheet body through a cover connecting portion, and the blocking sheet body is integrally formed with the container connecting portion and the cover connecting portion. The blocking sheet body is provided with a through hole communicating with the upper and lower parts of the body, and the through hole is used for pouring out the granular material.

[0005] Optionally, a first mounting surface is provided on the blocking sheet body, and the cover comprises a first diaphragm. A glue layer is provided between the first diaphragm and the first mounting surface.

[0006] When the first film sheet is an aluminum alloy film, the corresponding adhesive layer is a hot melt adhesive layer, and the first film sheet corresponding to the first mounting surface is sealed and connected by hot pressing; or when the first film sheet is an aluminum alloy film, the corresponding adhesive layer is a cold melt adhesive layer, and the first film sheet corresponding to the first mounting surface is sealed and connected by coating the cold adhesive and crimping.

[0007] When the first film sheet is an organic transparent film or an organic translucent film, the corresponding adhesive layer is an epoxy resin adhesive layer, and the first film sheet corresponding to the first mounting surface is sealed and connected by hot pressing; or when the first film sheet is an organic transparent film or an organic translucent film, the corresponding adhesive layer is an epoxy resin adhesive layer, and the first film sheet corresponding to the first mounting surface is sealed and connected by coating the epoxy resin adhesive layer and crimping.

[0008] Optionally, the diameter of the through hole for pouring out the material is in the range of 0.2 to 45.5 mm; one or more through holes are arranged near the edge of the cover body; the first mounting surface is arranged around the blocking sheet body, so that the periphery of at least one through hole is closed by the hot melt adhesive layer and / or at least one through hole is located at a non-hot melt adhesive sealing position.

[0009] Optionally, there is a non-hot melt adhesive sealing position between the blocking sheet body and the first film sheet, the first film sheet is close to the blocking sheet body at the non-hot melt adhesive sealing position, and an air layer is present therebetween, which is communicated with at least one through hole.

[0010] Optionally, the thickness of the first film sheet is 0.01 to 0.09 mm, the thickness of the body at the blocking sheet body is 0.1 to 0.5 mm, and a plastic layer is formed on the side of the first film sheet facing the blocking sheet body, and the thickness of the plastic layer is 0.001 to 0.01 mm.

[0011] Optionally, the entire blocking sheet body surface between the blocking sheet body and the first film sheet is hot melt connected, so that the blocking sheet body and the first film sheet are connected, the periphery of the through hole is closed by the hot melt adhesive layer, and the first film sheet and the blocking sheet body are tightly connected.

[0012] Optionally, the through hole is a plurality of through holes, the plurality of through holes are uniformly arranged, and the distance between the through holes is greater than 1.3 to 5 times the radius of the through hole; a large through hole is further arranged on the corresponding side of the plurality of through holes for inserting a spoon.

[0013] Optionally, the first film sheet is a smooth surface, and the through hole is formed by punching from one side of the first film sheet to the other side of the body; or the through hole is formed by punching from the other side of the body to the side of the first film sheet, and the connection between the first film sheet and the blocking body is hot melt crimping.

[0014] Optionally, the first film sheet is a concave-convex surface, the through hole is punched from one side of the first film sheet to the other side of the body; or the through hole is punched from the other side of the body to the side of the first film sheet, the connection between the first film sheet and the blocking piece is hot melt pressure bonding, and the first film sheet and the blocking piece after the hot melt pressure bonding are embossed by the embossing piece, wherein the male and female end faces of the embossing piece are concave-convex, the lower surface of the first film sheet is formed with uniformly spaced embossed concave points, and the concave-convex surface of the first film sheet forms an arc-shaped indentation consistent with the shape of the through hole after extrusion, which is present on the upper surface of the first film sheet.

[0015] Optionally, the first film sheet is provided with a handle part which is integrally connected with the first film sheet, is connected to the edge of the first film sheet, and has a free end folded towards the first film sheet to form a local double-layer film structure; the structure is located on the side where the plurality of through holes are located, and when the handle part tears the first film sheet, the through holes can be exposed; and there is at least one through hole under the double-layer film structure.

[0016] Optionally, the cover body exists in a stacked state, a plurality of same cover bodies are placed in a stacked manner up and down or left and right, the first film sheet is in contact with the blocking piece of the adjacent cover body, and the double-layer film structure is in contact with the blocking piece of the adjacent cover body, so as to partially separate the adjacent cover body.

[0017] The application also provides a packaging material, which comprises the cover body for pouring granular material and a container wall surface in sealing connection with the container connecting part of the cover body, the container wall surface and the cover body form a one-side opening containing cavity, and the opening is a feeding bottom opening, and a bottom opening connecting part for sealing connection is formed at the position of the container wall surface surrounding the feeding bottom opening.

[0018] The application also provides a container for containing granular material, which comprises the packaging material, and the cover body is in a state of upward opening from the opening, and the material is filled from the opening, and the material is supported by the blocking piece; the feeding bottom opening connecting part is in sealing connection with the connecting structure of the bottom cover.

[0019] The application also provides a container for containing granular material, which comprises a container body with a material opening upwardly arranged and a lower part sealed, and the material is poured from the material opening, and a top cover sealing part is arranged on the container body, and the top cover sealing part is in sealing connection with the container connecting part of the cover body for pouring granular material.

[0020] The application also provides a container for containing granular material, which comprises the cover body for pouring granular material and a container body, and the container body has a sealing connecting part in sealing connection with the container connecting part of the cover body, and the moisture-sensitive material is in the sealing cavity surrounded by the cover body and the container body.

[0021] The cover for pouring granular material can realize pouring granular material through the cover, that is, the package with the cover can be directly taken as a container for pouring and preserving granular material after removing the sealing structure, and the user can easily control the amount of pouring granular material through the distribution of the through holes on the blocking piece of the cover, thereby greatly facilitating the user, avoiding transferring the original package to other special seasoning bottles, and meanwhile avoiding the preservation problem of the original unpacked sealing original package. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a partial sectional view of the cover for pouring granular material of the embodiment of the present application;

[0023] Figure 2 It is an enlarged view of Figure 1

[0024] Figure 3 It is a partial sectional view of the cover for pouring granular material of another embodiment of the present application;

[0025] Figure 4 It is a partial sectional view of the cover for pouring granular material of another embodiment of the present application;

[0026] Figure 5 It is a partial sectional view of the package of the embodiment of the present application;

[0027] Figure 6 It is a partial sectional view of the container for granular material of the embodiment of the present application;

[0028] Figure 7 It is a partial sectional view of the container for granular material of another embodiment of the present application;

[0029] Figure 8 It is a cover structure schematic view for sealing a paper can of the embodiment of the present application;

[0030] Figure 9 It is a sectional view and an enlarged view of a paper can of the embodiment of the present application;

[0031] Figure 10 It is a sectional view and an enlarged view of the cover for sealing a paper can of the embodiment of the present application;

[0032] Figure 11 It is a sectional view and an enlarged view of the cover for sealing a paper can of the embodiment of the present application;

[0033] Figure 12 It is a sectional view and an enlarged view of the cover for sealing a paper can of the embodiment of the present application;

[0034] Figure 13 ​The sectional view and enlarged view of the adhesive layer provided on the inner wall surface contact section and part of the top wall contact section of the cover body;

[0035] Figure 14 The sectional view and enlarged view of the adhesive layer provided on the top wall contact section of the cover body after the cover body is pressed with the paper can;

[0036] Figure 15 The sectional view and enlarged view of the adhesive layer provided on the inner wall surface contact section of the cover body after the cover body is pressed with the paper can;

[0037] Figure 16 The sectional view and enlarged view of the adhesive layer provided on the inner wall surface contact section and part of the top wall contact section of the cover body after the cover body is pressed with the paper can.

[0038] Reference signs:

[0039] Cover body 100, body 110, barrier piece body 111, cover body connecting part 112, through hole 113, large through hole 114,

[0040] Container connecting part 120, inner wall surface contact section 121, top wall contact section 122, outer wall surface contact section 123, inner curled edge section 1231,

[0041] Handle part 131, material port 132, adhesive layer 133, first film piece 134,

[0042] Paper can 200, container wall 201, bottom port connecting part 202,

[0043] First flared part 210, step part 211, second flared part 220, label paper 300, sealing adhesive layer 400;

[0044] Granular material 500, bottom cover 600. DETAILED DESCRIPTION

[0045] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict in structure or function. The present application will be described in detail below according to examples.

[0046] The present application discloses a cover body for pouring granular material, which, together with the corresponding container body, forms a container enclosure for accommodating granular material and forms a cavity for accommodating granular material. In addition to the cover body structure disclosed in the present application, other cover body structures can be further provided for aesthetic and sealing purposes without conflicting with the cover body disclosed in the present application. The granular material is accommodated in the cavity, and the particle size of the granular material is 0.01 to 25 mm. Since the diameter of the material is not required to be uniform, the particle size here refers to the particle size of most of the material meeting the requirements of this particle size range. For irregular granular materials, the equivalent diameter of the volume is used.

[0047] In order to further reduce the dust falling on the cover of the present application, a shielding material can be provided on the outside of the cover, or an outer cover is provided on the outside of the cover, which does not conflict with the cover disclosed in the present application. The cover mentioned in the present application refers to the physical structure, the area of the cover is larger than the opening, so as to shield the opening. The sealing structure or sealing connection mentioned in the present application refers to the sealing structure, which is air-tight, and the air, moisture and oxygen passing through the sealing structure meet the protection requirements of the materials in the container. The container body can be cylindrical, square column or other shapes that can use the above cover, and the shape of the periphery of the cover is not limited. Although the embodiment is a circular cover, according to the design and development ability of the person skilled in the art, the shape of the periphery of the cover can be changed to adapt to the shape of the container. The material of the container body can be paper, plastic, iron, aluminum alloy and composite materials. The selection of the packaging material that meets the humidity, air tightness, strength and connectivity in the conventional material is also a design and development of the person skilled in the art without creative labor.

[0048] The embodiment of the present application provides a cover for pouring granular materials, as shown in Figure 1 、 Figure 2 and Figure 5 , comprising a sheet-shaped body 110, a container connecting portion 120 is arranged on the periphery of the body 110, the container connecting portion 120 is used for sealingly connecting the container wall 201; the container connecting portion 120 is connected to the blocking sheet 111 through the cover connecting portion 112, and the blocking sheet 111 is integrally formed with the container connecting portion 120 and the cover connecting portion 112, the blocking sheet 111 is provided with a through hole 113 communicating the upper and lower parts of the body 110, and the through hole 113 is used for pouring out the granular materials 500. The cover 100 is used for connecting the container body 110 and forming a cavity for accommodating the granular materials 500 in the container body 110, the diameter of the through hole 113 is larger than the diameter of the granular materials 500, so that the granular materials 500 can pass through the through hole 113 during pouring.

[0049] In the embodiment, the sheet-shaped body 110 of the cover 100 and the cover connecting portion 112 are connected, which can form a fastening cavity with the surface of the container wall 201. During transportation or use of the container containing the granular materials 500, or in the case of overturning, the granular materials 500 can be prevented from impacting the structure outside the body 110, such as the external plastic cover covering the tank and the cover 100, which is used for protecting and preventing dust from falling on the cover 100 for pouring out the granular materials 500. Even if a small amount of granular materials 500 passes through the through hole 113, it will not cause any problem, because a large amount of impact force is blocked and absorbed by the cover 100 and the cover connecting portion 112.

[0050] In some embodiments of the present application, the diameter of the through hole 113 for pouring out the material ranges from 0.2 to 45.5 mm, which includes the diameters of commonly used granular materials 500 such as table salt, granulated sugar, chicken essence, pepper, and other commonly used edible granular materials 500. When the diameter of the material is larger, a larger through hole 113 diameter is selected, and when the diameter of the material is smaller, a smaller through hole 113 diameter is selected. For different granular materials 500, the diameter of the through hole 113 can be 0.5 mm, 0.8 mm, 1.5 mm, 2.8 mm, 5.0 mm, 8.0 mm, 12 mm, 22 mm, etc. In this way, when pouring, the granular material 500 can be poured out in small amounts at a time, making it easy for the user to control the amount poured out at a time, and the total amount poured out by multiple controls. In some specific cases, a larger opening is also required for small granular materials 500, such as salt granules. In the case of a restaurant, a chef may require a large opening for rapid pouring of a specific amount of salt. The diameter of the opening can be 45 mm. Since the chef has a lot of practical experience, he can easily master the control of the appropriate pouring amount through the through hole 113. In order to meet the needs of the chef in this case, the diameter range can be between 25-45.5 mm.

[0051] In other embodiments, at least one through hole 113 or multiple through holes 113 are arranged near the edge of the blocking piece 111 or arranged around the entire edge of the blocking piece 111, making it easy for the user to randomly pick up the container body 110 to pour out without considering the current holding position. In some other embodiments, at least one through hole 113 or multiple through holes 113 are arranged near the blocking piece 111 and located in a certain local part, so the area of the through hole 113 will be smaller, and therefore the number of through holes 113 will be smaller, so that dust is less likely to enter the container, and humid air entering the container will also be less. In some other embodiments, the diameters of the multiple through holes 113 are different, and the diameters of the through holes 113 near the edge of the blocking piece 111 are smaller, so that the angle of the container can be adjusted to more effectively control the amount of granular material 500 poured out each time.

[0052] In some prior art, the manufacturer produces a packaging container containing a porous cover, such as a container for packaging pepper powder, which can achieve convenient guiding of the particulate material from the through hole of the outer cover, but its air tightness is difficult to guarantee, so that the particulate material is prone to damp during long-term storage and use. To solve this problem, in some embodiments of the present application, the blocking piece 111 is provided with a first mounting surface, and the cover 100 comprises a first film 134, and the first film 134 and the first mounting surface are provided with an adhesive layer 133 therebetween. In this way, the through hole 113 on the blocking piece 111 is sealed, and the first film 134 is detachably connected. Here, the detachable connection means that the first film 134 can be manually torn to expose one or more through holes 113 on the blocking piece 111. In order to more conveniently tear the first film 134, the edge of the surface of the first film 134 is further provided with a handle portion 131 that is easy to pinch. The handle portion 131 can be integrally formed with the first film 134 to enhance the connection stability of the first film 134. By pinching the handle portion 131 and lifting, the first film 134 can be conveniently torn. Through the first film 134, the particulate material 500 in the container is sealed from the manufacturer to the first use of the user, avoiding damp due to the through hole 113 communicating with the outside air. In the case of packaging particulate material 500, the first film 134 is used to seal the plurality of through holes 113 on the blocking piece 111, which can be a sealing adhesive layer 133, and all the through holes 113 are arranged in a ring-shaped sealing area or a sealing area formed by extending along a curve; or a structure in which a local first film 134 is formed around a through hole 113 to cover the through hole 113 through the adhesive layer 133; or each through hole 113 forms a structure in which a local first film 134 is formed around the through hole 113 to cover the through hole 113 through the adhesive layer 133. The above structures can achieve sealing of at least one or more through holes 113 by the first film 134, so as to seal the container connected by the cover 100. By sealing the first film 134 and the blocking piece 111, the air tightness requirement of the particulate material in the container cavity is achieved, so that the dry requirement of the particulate material can be met during long-term storage, and the particulate material can be conveniently poured out after tearing the first film 111 during use.

[0053] The first film 134 is connected with the cover 100 through the adhesive layer 133, and the connection is detachable, so that the first film 134 has low stress resistance and is easy to be damaged and leaked. Therefore, it is necessary to avoid the direct impact of the large amount of granular material 500 on the first film 134. The sheet-shaped body 110 of the cover 100 and the cover connecting part 112 are connected, and this part can form a tightly connected cavity with the container wall 201. During the transportation or use of the container containing the granular material 500, or in the case of overturning, the granular material 500 can be prevented from impacting the structure outside the body 110, such as the first film 134. Even if a small amount of granular material 500 passes through the through hole 113, it will be left between the first film 134 and the blocking piece 111 of the cover 100, and a small amount of granular material 500 will not cause any problem. After all, a large amount of impact force is blocked and absorbed by the cover 100 and the cover connecting part 112.

[0054] As a preferred embodiment, the through holes 113 are distributed in a local area close to the edge of the blocking piece 111, and the handle part 131 is arranged at the edge of the first film 134 corresponding to the local area. Figure 2 As shown in FIG. 6, the through holes 113 are concentratedly distributed in a local area close to the edge of the blocking piece 111, and the handle part 131 is arranged at the edge of the first film 134 corresponding to the local area. In this way, when the user holds the handle part 131 and lifts it, only the edge of the first film 134 is torn to expose the through holes 113, so that the user can quickly locate the position of the through holes 113 when using the granular material 500 in the cavity for the first time. In addition, the user can selectively tear a part of the first film 134 to expose only a part of the through holes 113, so as to control the flow rate of the granular material.

[0055] In some embodiments of the present application, the first film 134 can be an aluminum alloy or a thin film made of a high molecular organic material. When the first film 134 is an aluminum alloy film, the corresponding adhesive layer 133 is a hot melt adhesive layer, and the first film 134 corresponding to the first mounting surface is sealed and connected by hot pressing.

[0056] Alternatively, in some embodiments of the present application, when the first film 134 is an aluminum alloy film, the corresponding adhesive layer 133 is a cold melt adhesive layer, and the first film 134 corresponding to the first mounting surface is sealed and connected by coating the adhesive layer 133 and pressure bonding.

[0057] In some embodiments of the present application, the first film 134 is an organic transparent film or an organic semi-transparent film, and the corresponding adhesive layer 133 is an epoxy adhesive layer 133. The first film 134 corresponding to the first mounting surface is sealed and connected by hot pressing. Alternatively, the first film 134 corresponding to the first mounting surface is sealed and connected by coating the epoxy adhesive layer 133. Through the transparent or semi-transparent film, the user can see the position of the through hole 113, which facilitates the user to tear the first film 134 at the corresponding position, thereby improving the user experience.

[0058] The hot melt adhesive can be a PLA material or an environmentally friendly water-based coating.

[0059] In some embodiments of the present application, the first film 134 is an aluminum alloy or a thin film made of a high molecular organic material. When the first film 134 is an aluminum alloy film, the corresponding adhesive layer 133 is a cold adhesive coated on the first mounting surface, and the first film 134 corresponding to the first mounting surface is sealed and connected by pressing. Alternatively, the first film 134 is an organic transparent film or an organic semi-transparent film, and the corresponding adhesive layer 133 is a cold adhesive, and the first film 134 corresponding to the first mounting surface is sealed and connected by pressing.

[0060] One or more through holes 113 are arranged near the edge of the cover 100, and the first mounting surface is arranged around the blocking piece 111, so that the periphery of at least one through hole 113 is sealed by the hot melt adhesive layer and / or at least one through hole 113 is located in a non-hot melt adhesive sealing position. In this way, due to the hot pressing of the adhesive layer 133, part of the adhesive layer 133 will invade the vertical surface of the through hole 113, thereby increasing the contact area and forming a horizontal connection force. In particular, when multiple through holes 113 are used in this connection form, the connection tightness of the first film 134 and the blocking piece 111 in the horizontal direction can be effectively improved. Figure 1 and Figure 2 As shown in the drawings, the first mounting surface is arranged at the peripheral position of the blocking piece 111 to form an annular mounting surface around the peripheral edge of the blocking piece 111, and the through hole 113 is located inside the annular mounting surface. In this way, the blocking piece 111 is sealed while saving the material of the adhesive layer 133, and the process of sealing between the first film 134 and the blocking piece 111 is simplified.

[0061] In some embodiments of the present invention, there is a non-hot melt adhesive seal between the barrier sheet 111 and the first diaphragm 134. At the non-hot melt adhesive seal, the first diaphragm 134 is close to the barrier sheet 111. All through holes 113 are arranged in an annular sealing area or a sealing area formed by a closed extension along a curve. In this way, an air layer is formed between the first diaphragm 134 and the barrier sheet 111 in the sealing area. The air layer is connected to at least one through hole 113, so that when the cover 100 is sealed and connected to the container, the air in the air layer is connected to the air in the container. Figure 1 and Figure 2 As shown, the first mounting surface is arranged on the periphery of the blocking sheet 111 to form a sealing area of ​​the annular mounting surface, and the inside of the annular mounting surface is a non-sealed area, so that a small gap exists between the blocking surface and the first diaphragm 134 in this area, and the height of the gap is about 0.1-5 mm, thereby forming an air layer, and communicating with the cavity of the container through the through hole 113. After the manufacturer of the granular material 500 uses the cover 100 of this embodiment to seal the container containing the granular material 500 to form a product, during the transportation or handling of the product, a portion of the granular material 500 will enter the space formed by the air layer from these gaps. In the area of ​​the blocking sheet 111 where multiple through holes 113 are located, the area of ​​the blocking sheet 111 between the through holes 113 is small, so it is easy to form a larger gap with the first diaphragm 134 in this area, and the spacing between the gap between the blocking sheet 111 where the non-through holes 113 are located is large, so that the granular material 500 entering the air layer can easily return to the cavity of the container from the larger gaps where these through holes 113 are located during the movement of the container.

[0062] In some embodiments of the present invention, a plastic layer is formed on the side of the first film 134 facing the barrier sheet 111. The thickness of this plastic layer is 0.001 to 0.01 mm, while the thickness of the first film 134 is 0.01 to 0.09 mm. This makes the first film 134 relatively thin and flexible, allowing it to be easily bent under force, allowing a user to easily tear it from the barrier sheet 111 by pinching the handle 131. The thickness of the body 110 at the barrier sheet 111 is 0.1 to 0.5 mm, such as 0.2 mm, 0.25 mm, and 0.3 mm. This ensures that the body 110 meets the required hardness and forms a strong connection between its container connection portion 120 and a container, such as a paper can. The plastic layer is very thin relative to the thickness of the barrier sheet 111 and is made of a transparent material, making it difficult to be detected on the barrier sheet 111. The plastic layer is heated and pressed on the blocking sheet 111 and the first diaphragm 134 at the first mounting surface by a device, so that a hot melt adhesive layer is formed between the two at the first mounting surface, thereby achieving a sealed connection between the two.

[0063] In some embodiments of the present invention, Figure 4As shown, the whole surface of the blocking piece 111 between the blocking piece 111 and the first film 134 is hot-welded, so that the blocking piece 111 is connected with the first film 134, the periphery of the through hole 113 is sealed by the hot-melt adhesive layer, and the first film 134 and the blocking piece 111 are tightly connected. Different from the scheme of Figure 1 and Figure 2 The difference between the scheme and the scheme of the previous embodiment is that the first mounting surface of the blocking piece 111 is not limited to the periphery of the blocking piece 111, but is arranged on the whole surface of the blocking piece 111, and the whole outer surface of the blocking piece 111 is heated and pressed with the first film 134 when the machine is heated and pressed, so that the hot-melt adhesive layer is distributed between the whole surface of the blocking piece 111 and the first film 134, the periphery of the through hole 113 is sealed by the hot-melt adhesive layer, and there is no gap between the blocking piece 111 and the first film 134. In the previous embodiment, when the mounting surface of the blocking piece 111 is located at the periphery of the blocking piece 111, the region inside the mounting surface causes an air layer between the blocking piece 111 and the first film 134, and a gap is formed between the two. Because the thickness of the first film 134 is much smaller than that of the blocking piece 111, when the first film 134 is an aluminum alloy film, the thin aluminum film is soft in texture, so that after the first film 134 is connected with the first film 134 by heating and pressing, the surface of the first film 134 in the region where the air layer is located is prone to uneven distribution, which affects the appearance of the product formed after the whole cover body 100 is packaged with the container. The scheme of hot-welding the whole surface of the blocking piece 111 with the first film 134 in the present embodiment scheme makes the surface of the first film 134 flat, avoiding the above problems.

[0064] In some embodiments of the present application, the through hole 113 is a plurality of through holes, and the plurality of through holes 113 are uniformly arranged, and the spacing of the through holes 113 is 1.3 to 5 times the radius of the through hole 113; preferably, the plurality of through holes 113 are uniformly distributed in a region of the blocking piece 111, so that the flow of the material particles is concentrated and uniform. Because in some embodiments, the first film 134 is a smooth planar film and will not be pressed; in some embodiments, the first film 134 will be pressed by the upper and lower molds during hot-welding, and the pressing surface of the mold has a concave-convex shape, and a plurality of repeated concave-convex patterns of the first film 134 are formed at the extrusion position. During the pressing process, the body 110 of the cover body 100 will also be pressed, and when the diameter of the through hole 113 is large, a complete concave-convex pattern will fall into a certain through hole 113, thereby causing a large downward pressure on the film at that position, reducing the consistency of the cover body 100, and there is a risk of air leakage. Therefore, on the one hand, the diameter of the through hole 113 is limited to 0.5 to 5.0 mm, and on the other hand, the spacing of the through hole 113 is limited to 1.3 to 5 times the radius of the through hole 113, which can effectively reduce the above situation and improve the consistency of the cover body 100 during the pressing process of the concave-convex pattern.

[0065] In some embodiments of the present application, as shown in Figure 3 In some embodiments of the present application, as shown in

[0066] In some embodiments of the present application, the first film 134 is smooth, the through hole 113 is punched from one side of the first film 134 to the other side of the body 110; or the through hole 113 is punched from the other side of the body 110 to the side of the first film 134, and the connection between the first film 134 and the blocking body 110 is hot melt pressure bonding, and the male and female end faces of the pressure bonding part are flat. A circular ring-shaped hot pressing surface is formed around the blocking body 110, thereby forming a circular ring-shaped sealing area, and the first film 134 at the corresponding position of the plurality of through holes 113 in the middle is smooth. The opening direction on the blocking body 110 has two directions, which is punched from one side of the first film 134 to be pasted to the other side of the body 110, or punched from the other side of the body 110 to the side of the first film 134. The former opening direction will form a small burr on the lower surface of the blocking piece 111, which is the side of the body 110 facing the container cavity. The latter opening direction will form a small burr on the upper surface of the blocking piece 111, which is the side of the body 110 away from the container cavity. When the burr is directed towards the first film 134 covering the top of the cover 100 currently pouring the granular material 500, it is easy to pierce the first film 134 and cause damage to the seal when moving or other extrusion occurs. Therefore, there is a means to eliminate the burr, and in some embodiments, the burr is flattened to reduce the burr; in some embodiments, the burr is polished to reduce the burr. Both can effectively improve the quality reliability.

[0067] In the production of the cover body 100, the body 110 is first molded by a mold device of a machine, and punched to form the through hole 113; at the same time, another device cuts the aluminum foil to form the shape of the first film sheet 134, including forming the handle part 131 integrally formed with the first film sheet 134; then the body 110 and the first film sheet 134 are heated and pressed by the machine to realize the hot melt pressure bonding of the two, the handle part 131 is shaped to be bent towards the surface of the first film sheet 134 and arranged close to the surface, since the handle part 131 is bent and simultaneously pressure bonded with the corresponding position of the first film sheet 134, at least one through hole 113 is located in the area projected by the handle part 131, thus, due to the thickness of the two layers of the first film sheet 134 in the local part, the pressure bonding condition is improved, and the influence of the through hole 113 on the stability of the first film sheet 134 is significantly improved.

[0068] In some embodiments of the present application, the first film 134 is concave-convex, the through hole 113 is punched from one side of the first film 134 to the other side of the body 110; or the through hole 113 is punched from the other side of the body 110 to the side of the first film 134, the connection between the first film 134 and the blocking piece is hot melt pressure bonding, and the first film 134 and the blocking piece after hot melt pressure bonding are embossed by an embossing piece, wherein the male and female end faces of the embossing piece are concave-convex, the lower surface of the first film 134 is formed with uniformly spaced embossed concave points, and the concave-convex surface of the first film 134 forms an arc-shaped convex indentation after being extruded by the through hole 113, which is present on the upper surface of the first film 134. In this embodiment, compared with the first film 134 with a smooth surface in the above-mentioned embodiment, a process is added at the end of the production of the cover 100, and the cover 100 after the handle is shaped is sent to the mold of the embossing piece for embossing treatment. The upper and lower embossing pieces are pressed at the same time on the upper surface of the first film 134 and the lower surface of the blocking piece 111, wherein the end face of the embossing piece in contact with the upper surface of the first film 134 is concave, and the end face of the embossing piece in contact with the lower surface of the blocking piece 111 is convex. Since the first film 134 is much thinner than the blocking piece 111, the first film 134 is easier to shape than the blocking piece 111. Therefore, after pressing, a convex pattern of the embossed concave-convex surface is formed on the upper surface of the first film 134, and only embossed concave points but not concave lines are formed on the lower surface of the blocking piece 111. Moreover, during the pressing process, the through hole 113 on the blocking piece 111 forms an arc-shaped convex indentation on the upper surface of the first film 134, which is consistent with the shape of the through hole 113. For example, when the through hole 113 is circular, a circular indentation consistent with the size of the circular through hole 113 is formed on the first film 134 after pressing. This circular indentation allows the end user to easily identify the position of the through hole 113 of the blocking piece 111 under the first film 134 when using the container product of the particulate material 500 for the first time, so that the user can easily control the size of the first film 134 to be torn to expose the corresponding through hole 113, thereby controlling the flow of the particulate material 500. Moreover, as mentioned in the above-mentioned embodiment, when the surface of the first film 134 is a smooth plane when the first film 134 is connected to the blocking piece 111 through the hot melt adhesive layer provided around the blocking piece 111, the uneven distribution in the area of the first film 134 inside the mounting surface affects the appearance of the entire cover 100. In this embodiment, the first film 134 and the blocking piece after hot melt pressure bonding are embossed by an embossing piece, so that the surface inside the mounting surface of the first film 134 forms a convex pattern of the concave-convex surface. This convex pattern not only enhances the appearance, but also greatly eliminates the original uneven distribution, that is, the original uneven distribution is eliminated by the concave-convex surface, so that the surface of the entire first film 134 is flat, further solving the problem of affecting the appearance.

[0069] In some embodiments of the present application, the first film 134 is provided with a handle portion 131 which is integrally connected with the first film 134, is connected to the edge of the first film 134, and has a free end folded towards the first film 134 to form a partial double-layer film structure; the structure is located on the side where the plurality of through holes 113 are located, and when the handle portion 131 tears the first film 134, the through holes 113 can be exposed; and there is at least one through hole 113 under the double-layer film structure. The distribution position of the plurality of through holes 113 is preferably close to the position of the first film 134 where the handle is located, so that when the first film 134 is torn by the handle, the through holes 113 can be exposed.

[0070] In some embodiments of the present application, the cover body 100 is in a stacked state, a plurality of identical cover bodies 100 are placed in a stacked manner up and down or left and right, the first film 134 is in contact with the blocking piece 111 of the adjacent cover body 100, the double-layer film structure is in contact with the blocking piece 111 of the adjacent cover body 100, so as to partially separate the adjacent cover body 100.

[0071] After the cover 100 is made and the packaging is completed, the cover 100 is in a stacked state, that is, a plurality of the same cover 100 is stacked up and down or left and right. Taking the up and down stacking as an example, the stacked placement of the plurality of covers 100 forms a columnar package with a height of about 50-200 CM. The stacking of such a height will cause pressure between the covers 100, especially the cover 100 close to the lower layer, which bears relatively large pressure from the cover 100 above, and in order to save space during operation, multiple packages may be stacked up and down, which makes the pressure even larger. In the above embodiment, when the body 110 is punched to form the through hole 113 during the production of the cover 100, different punching directions will form a small burr on different surfaces of the blocking sheet 111 of the body 110. If there is a small burr on the upper surface of the blocking sheet 111, the pressure between the covers 100 will cause the burr to affect the lower surface of the first diaphragm 134, that is, to form a small scratch mark on the lower surface of the first diaphragm 134. Since the scratch mark is on the lower surface of the first diaphragm 134, it is not easy for the user to notice when the user actually uses the product of the particulate material 500, and thus it basically does not affect the user's use or visual experience of the product. If there is a small burr on the lower surface of the blocking sheet 111, the burr will form a small scratch mark on the upper surface of the first diaphragm 134 of another cover 100 in contact with it when stacked. This scratch mark may be increased due to excessive pressure or mutual sliding between the covers 100 during transportation and handling, thereby causing obvious visual effects in appearance, which affects the user's use experience. Therefore, the punching direction of the body 110 is preferably punching from the other side of the body 110 to the side of the first diaphragm 134 to form a small burr on the upper surface of the blocking sheet 111.

[0072] The present application also provides a packaging material, such as Figure 5 and Figure 6As shown, the container wall 201 connected to the container connecting part 120 of the cover 100 for pouring out the granular material 500 is sealed to the cover 100 to form a one-side opening containing cavity, and the opening is the feeding bottom opening, and the bottom opening connecting part 202 for sealing connection is formed at the part of the container wall 201 surrounding the feeding bottom opening. For the package with the cover 100, in addition to the cover 100 for pouring out the granular material 500 and the container wall 201 connected to the container connecting part 120 of the cover 100 to form a one-side opening containing cavity, and the opening is the feeding bottom opening, and the bottom opening connecting part 202 for sealing connection is formed at the part of the container wall 201 surrounding the feeding bottom opening. The factory producing the material pours the package upside down, so that the feeding bottom opening faces upward, the granular material 500 enters the containing cavity from the feeding bottom opening after being weighed, and the granular material 500 is impacted by the blocking piece due to gravity, and the impact force is large, and the blocking piece integrated with the connecting part of the cover 100 can better resist the impact of a large amount of granular material 500.

[0073] Further, the bottom opening connecting part 202 for sealing connection is formed at the part of the container wall 201 surrounding the feeding bottom opening, and the bottom opening connecting part 202 needs to be processed neatly, and the end of the bottom opening connecting part 202 is prepared for connection, and common flaring or necking can be performed to facilitate the connection of the corresponding connecting part of the bottom cover. Since the bottom cover has lower cost and simple and mature connection process, when the material producing factory needs to fill the granular material 500, the bottom cover with simpler processing is left for the factory to seal, that is, the material producing factory purchases the package containing the cover 100 for pouring out the granular material 500 from the can manufacturing enterprise, fills the granular material 500, and then seals the bottom cover to the package.

[0074] The application also provides a container for filling the granular material 500, which contains the package mentioned in the above embodiments, and the material is filled from the opening of the cover 100 in the state of the lower opening facing upward, and the material is supported by the blocking piece; and the feeding bottom opening connecting part 202 is sealed to the connecting structure of the bottom cover.

[0075] The application also provides a container for filling the granular material 500, which contains the package mentioned in the above embodiments, and the material is filled from the opening of the cover 100 in the state of the lower opening facing upward, and the material is supported by the blocking piece; and the feeding bottom opening connecting part 202 is sealed to the connecting structure of the bottom cover. Figure 7As shown, the container body is provided with a material opening upward and sealed at the lower part, the material is poured from the material opening, and a top cover sealing part is arranged on the container body and is sealingly connected with the container connecting part 120 of the cover body 100 for pouring out the granular material 500. For the container for granular material 500 using the cover body 100, the container body is provided below the cover body 100 and is sealed at the lower part, the container body is provided with a material opening 132 upward, the granular material 500 enters the container body from the material opening 132, and a top cover sealing part is arranged on the container body and is sealingly connected with the container connecting part 120 of the cover body 100. In this case, since the container body is sealed at the bottom, the sealing connection structure can be reduced, and the sealing connection structure is processed, especially for plastic containers, aluminum alloy containers, iron can containers or glass containers, etc., which are more conducive to reducing the sealing surface, improving the sealing performance, and reducing the influence of the processing process on the granular material 500. The material manufacturer needs to purchase the cover body 100 and the container body when processing the container for granular material 500, and the sealing connection of the container connecting part 120 and the top cover sealing part is performed when the granular material 500 is loaded.

[0076] The application also provides a container for granular material 500, which comprises the cover body 100 for pouring out the granular material 500 and a container body, the container body is provided with a sealing connecting part sealingly connected with the container connecting part 120 of the cover body 100, and the moisture-sensitive material is arranged in the sealing cavity formed by the cover body 100 and the container body, and the moisture-sensitive material is chicken essence, sugar and other moisture-sensitive granular materials 500. According to the different materials of the container, the sealing connecting part corresponds to different connecting structures, for example, when the container is an iron can, the container connecting part 120 of the cover body 100 and one end of the iron can can be sealingly connected by the pressing method of mutual buckling described in the prior art, and when the container is a paper can, the one end of the paper can is formed into an expanded part, and the container connecting part 120 is first crimped and sealed by pressing the expanded part, thereby realizing the sealing of the cover body 100 and the container body at one time.

[0077] It is worth noting that the container in the above embodiments can be a paper can, an iron can and a plastic can body, in some embodiments, the iron can has a circular can opening, the cover body 100 for pouring out the granular material 500 is arranged on the circular can opening of the iron can, an outward flange is arranged on the circular can opening of the iron can, a sealing glue is arranged on the inner wall surface of the container connecting part 120 around the cover body 100, the container connecting part 120 is engaged with the flange of the can opening, the sealing glue is deformed to fill the gap between the two, and the container connecting part 120 is engaged with the flange to form a consolidated sealing connection surface through mechanical processing.

[0078] In some embodiments, the plastic can body has a circular can mouth and the cover 100 for pouring out the granular material 500 is arranged on the circular can mouth of the plastic can, the inner wall surface of the container connecting portion 120 at the periphery of the cover 100 is provided with a sealing glue, the sealing glue is in abutment with the outwardly extending can mouth of the plastic can mouth, and the container connecting portion 120 is extruded after clamping the extending portion of the plastic can mouth through machining, the sealing glue is deformed to fill the gap between the two, so that the container connecting portion 120 and the plastic can mouth form a consolidated sealing connection surface.

[0079] The present application also provides a cover for sealing a paper can, which adopts the structure of the cover for pouring out the granular material in the above-mentioned embodiments, as shown in Figures 8 to 13 The container connecting portion 120 at the periphery of the body 110 corresponds to the container connecting portion 120 in the cover for pouring out the granular material described above, which is used to realize connection with the container body, and the container in this embodiment is a paper can. The container connecting portion 120 is provided with an inner wall surface contact section 121 in contact with the inner wall surface of the paper can 200, and the inner wall surface contact section 121 is provided with a sealing glue 400. The cover 100 for sealing the paper can 200 includes the intermediate body 110, and the container connecting portion 120 at the periphery of the body 110 is connected with the paper can 200, specifically by applying force to the container connecting portion 120 by a machine to press it, so that the container connecting portion 120 and the inner and outer wall surfaces of one end of the paper can 200 are pressed tightly to realize the sealing of the two.

[0080] In some embodiments of the present application, the container connecting portion 120 is connected to the blocking piece 111 through a cover connecting portion (not shown in the figure), and the blocking piece 111 is integrally formed with the container connecting portion 120 and the cover connecting portion.

[0081] In some embodiments, the blocking piece 111 is provided with a through hole 113 communicating between the upper and lower bodies 110, which is used for pouring out the granular material. The blocking piece 111 is provided with a first mounting surface, and the cover 100 further includes a first film 134, and a glue layer 133 is arranged between the first mounting surface and the first film 134. The cover connecting portion here is the portion in the body 110 connecting the container connecting portion 120 to the glue layer 133.

[0082] In some embodiments of the present application, in order to press the paper can 200 and the cover 100 to realize good sealing, as shown in Figure 11As shown, the sealing glue 400 is coated on the container connecting part 120 of the cover body 100 before pressing, and specifically, the sealing glue 400 is arranged on the top wall contact section 122 of the container connecting part 120, so that the sealing glue 400 is between the container connecting part 120 and the contact surface of the paper can 200 during pressing to enhance the sealing. During pressing of the cover body 100 and the paper can 200, the sealing glue 400 is generally filled between the end surface of the paper can 200 and the container connecting part 120, so that the paper can 200 and the cover body 100 are pressed through the filling of the sealing glue 400 between them to achieve the air tightness requirement. Through test, the scheme can withstand the air tightness requirement of about 20Kp atmospheric pressure.

[0083] In some embodiments of the present application, as shown in Figure 12 As shown, the sealing glue 400 is arranged on the inner wall contact section 121 of the container connecting part 120, so that after pressing with the paper can 200, the inner wall contact section 121 and the inner wall surface of the opening of the paper can 200 are filled with the sealing glue 400 in the middle, and because the area of the inner wall contact section 121 is larger than that of the top wall contact section 122 and the inner wall contact section 121 is in close contact with the inner wall surface of the paper can 200 during machine pressing, the sealing glue 400 is extruded to achieve good sealing of the two contact surfaces. In addition, the inner wall surface of the paper can connected with the sealing glue 400 is a smooth wall surface, which is specifically a paper wall surface, an aluminum foil wall surface or a plastic film wall surface, or a wall surface formed by a combination of them, and after pressing, the sealing glue 400 has sufficient contact with the smooth wall surface to form a good connection surface. Through experiments, it is found that compared with the scheme of arranging the sealing glue 400 on the top wall contact section 122 of the container connecting part 120 in the previous embodiment, the scheme can withstand the sealing test of atmospheric pressure of more than 30Kpa, and even the atmospheric pressure can reach more than 40Kpa, so that the air tightness of the paper can 200 packaging is greatly improved, thereby improving the quality of the product. Generally, the paper can is manufactured in the form of composite spiral bonding, and after shearing, the end surface is rough and uneven, so in the prior art, the end surface is connected with the top wall contact section through the sealing glue, and after pressing, the sealing glue enters the inside of the end surface, and the burr or paper material directly contacts the top contact section, which reduces the bonding and sealing performance, and it can only withstand the sealing test of atmospheric pressure of less than 22Kpa.

[0084] In some embodiments of the present application, specifically, as shown in Figure 10 As shown, the above-mentioned container connecting part 120 includes the inner wall contact section 121, the top wall contact section 122 which contacts the top wall of the paper can 200, and the outer wall contact section 123 which contacts the outer wall of the paper can 200, which are sequentially connected and form a nearly U-shaped structure, and during packaging with the paper can 200, one end of the paper can 200 is inserted into the cavity formed by the U-shaped structure, and then the machine is pressed, so that the three sections are tightly matched with the opening part of the paper can 200 to achieve sealing.

[0085] In addition to the inner wall surface contact section 121, the sealant 400 can also be applied to part of the top wall contact section 122, as shown in FIG. 4, so that the inner wall surface contact section 121 and part of the top wall contact section 122 are coated with the sealant 400, and the sealant 400 is filled between the inner wall surface of the opening of the paper can 200 and the end surface of the paper can 200 when the lid 100 is pressed against the paper can 200, thereby achieving better sealing effect. Figure 13

[0086] In some embodiments of the present application, in addition to the inner wall surface contact section 121 and part of the top wall contact section 122 being provided with the sealant 400, part of the outer wall surface contact section 123 can also be provided with the sealant 400 (not shown in the figure), so that the sealant 400 is filled between the inner wall surface of the opening of the paper can 200, the end surface of the paper can 200, and the outer wall surface of the paper can 200 when the lid 100 is pressed against the paper can 200, thereby achieving better sealing effect.

[0087] In some embodiments of the present application, as shown in FIG. 1 and FIG. 2, the body 110 is a flat surface, the inner wall surface contact section 121 is annularly connected to the periphery of the body 110, and the inner wall surface contact section 121 forms an outward flared lid 100 with respect to the body 110. The surface of the paper can 200 that contacts the inner wall surface contact section 121 is the first flared portion 210, and the first flared portion 210 forms an angle A of 3-30° with respect to the axis of the paper can 200. Figure 9 Figure 10 In some embodiments of the present application, as shown in FIG. 1 and FIG. 2, the body 110 is a flat surface, the inner wall surface contact section 121 is annularly connected to the periphery of the body 110, and the inner wall surface contact section 121 forms an outward flared lid 100 with respect to the body 110. The surface of the paper can 200 that contacts the inner wall surface contact section 121 is the first flared portion 210, and the first flared portion 210 forms an angle A of 3-30° with respect to the axis of the paper can 200.

[0088] ​​In the process of pressing the cover 100 and the paper can 200 by the machine, the pressing head of the machine is deep into the inner wall contact section 121 and abuts against the body 110, then the outer wall contact section 123 is bent inwardly by the forming and clamping device of the machine and is pressed against the outer wall of the paper can 200 to realize the pressing of the paper can 200 and the cover 100, after the pressing is completed, the paper can 200 and the cover 100 are naturally separated from the pressing head of the machine to complete the whole process. By forming the outward flaring of the inner wall contact section 121 relative to the body 110, the cover 100 can be naturally separated from the pressing head after the pressing of the cover 100 and the paper can 200 is completed, and the opening of the paper can 200 is provided as the outward flaring surface, which is beneficial to the effective combination of the outer wall contact section 123 of the cover 100 and the outer wall of the flaring surface of the paper can 200, and prevents the cover 100 from falling off in the process of use.

[0089] In some embodiments of the present application, in order to realize the gluing of the cover 100 to form the sealing glue 400, the cover 100 is clamped by the gluing machine and is rotated at high speed, and the sealing glue nozzle sprays the environment-friendly sealing glue at the fixed position, so that the sealing glue 400 is uniformly coated on the container connecting part 120 of the cover 100; or the position of the cover 100 is fixed, the sealing glue nozzle is rotated at high speed around the container connecting part 120 of the periphery of the cover, and the sealing glue 400 is also uniformly coated on the container connecting part 120 of the cover 100.

[0090] The present application also provides a sealing structure, as shown in the accompanying drawings, comprising the cover structure for sealing the paper can, further comprising the paper can 200, the cover 100 and the paper can 200 are sealed and connected by pressing, and the inner wall contact section 121 of the paper can 200 and the cover 100 is bonded by the sealing glue 400. Figures 14 to 16

[0091] ​During the process of the paper can 200 and the cover body 100 being pressed by the machine, the flaring angle C of the cover body 100 formed by the inner wall surface in contact with the pressing process may change or remain unchanged depending on the different inclination angles of the machine's pressing head. If the inclination angle of the pressing head is different from the first flaring angle, the angle of the flaring angle C of the cover body 100 will change after the pressing is completed, such as the angle becoming slightly larger or slightly smaller; if the inclination angle of the pressing head is the same as the flaring angle of the cover body 100, the flaring angle C of the cover body 100 will remain unchanged after the pressing is completed. During the pressing process, the contact section between the paper can 200 and the container connecting part 120 of the cover body 100 is subjected to the extrusion force formed by pressing, and its thickness will be slightly thinner, and the sealant 400 will also be thinner and extend in the width direction, thereby increasing the area of ​​the sealant 400, expanding the contact area with the container connecting part 120 and the contact surface of the paper can 200, and during the pressing process, there will be some tiny gaps in the contact between the paper can 200 and the container connecting part 120. After the sealant 400 becomes thinner and extends, these gaps will be filled, thereby enhancing the air tightness and sealing effect.

[0092] Specifically, Figure 12 For example, the sealant 400 is provided in the inner wall contact section 121. During the pressing process of the cover 100 and the machine, the sealant 400 becomes thinner and extends to both ends in the width direction, specifically along the peripheral direction of the body 110 and the top wall contact section 122. Figure 15 As shown, the area of ​​the sealant 400 is increased. Figure 13 and Figure 16 The figure shows the changes of the sealant 400 before and after pressing on the inner wall contact section 121 and part of the top wall contact section 122 of the cover. Figure 11 and Figure 14 The figure shows the changes before and after pressing of the sealant 400 provided on the top wall contact section 122. As can be seen from the figure, after pressing, the sealant 400 becomes thinner and the area increases. Figure 14 Shown for Figure 11 The cross-sectional view of the sealant 400 after pressing the cover 100 and the paper can 200 with the sealant provided at the top wall contact section is shown. From the drawing, it can be seen that although the sealant is also thinner, its area is smaller than that of the first two methods, and there is also a gap between the sealant and the end surface of the paper can 200 and the top wall contact section 122, which is not completely fitted. Therefore, its airtightness is not as good as Figure 15 and Figure 16 The scheme shown.

[0093] In some embodiments of the present invention, Figure 14 and Figure 15As shown, during the pressing process, the free end of the outer wall contact section 123 is formed into an inner curling section 1231, and the flared section of the paper can 200 is formed into a step portion 211. The curling section 1231 tightly abuts against the stepped surface of the step portion 211, thereby achieving a stable and reliable connection between the lid 100 and the paper can 200. The visible portion of the outer wall contact section 123 can be curved or flat after pressing, depending on the pressing machine. In this embodiment, the outer wall contact section 123 is curved.

[0094] Specifically, during the machine pressing process, the inner wall contact section 121 is formed and then elongated, the width of the top wall contact section 122 becomes narrower, and at the same time the outer wall contact section 123 is also elongated, and the free end of the outer wall contact section 123 is bent inward to form an inner curling section 1231. The inner curling section 1231 abuts against the outer wall surface of the paper can 200 to generate force, and the outer wall surface of the paper can 200 is formed into the above-mentioned step portion 211 by the inner curling section 1231, so as to achieve close abutment between the two and realize a firm connection between the cover body 100 and the paper can 200.

[0095] In some embodiments of the present invention, the other end of the paper can 200 forms a second flared portion 220, such as Figure 9 As shown. The flaring can be formed in the same manner as the first flared portion 210. The manufacturer of the paper can 200 flares both ends of the paper can 200, presses one end against the lid 100, and then sells it to a food manufacturer. The food manufacturer then fills the other open end with food materials such as chicken bouillon or potato chips, and then presses the bottom lid against the paper can 200 to seal the food can. The second flared portion 220 serves the same purpose as the first flared portion 210, facilitating a secure connection with the bottom lid and enhancing the overall sealing effect.

[0096] In some embodiments of the present invention, the outside of the paper can 200 is covered with label paper 300, and the two ends of the label paper 300 are aligned with the two ends of the paper can 200, so that when the paper can 200 is pressed with the cover body 100, the label paper 300 is pressed together with the surface of the paper can, and achieves close contact with the outer wall contact section 123 of the cover body 100.

[0097] In some embodiments of the present invention, the paper tube forming the paper can 200 is at least one layer of spirally wound paper layer, an aluminum foil layer or an aluminized film layer is spirally arranged on the inner side of the wound paper layer, and a PE layer is provided on the aluminum foil layer or the aluminized film layer toward the inner side of the tube (or there may be no aluminum foil layer or the aluminized film layer and the paper is attached to the inner side of the tube). One side of the PE layer has an inward folded edge, and the width of the folded edge is 0.5 to 35 mm, preferably 10 mm. By heating the PE layer at the folded edge and the PE layer at the overlapped edge during the tube rolling process, the two PE layers are heat-fused and pressed into one, forming a sealed PE layer layer.

[0098] In order to improve the lubricity of the PE layer, an oil layer is coated on the PE surface of the aluminum foil layer, and the oil layer is a lubricant used to prevent the PE layer from being damaged due to friction with the pipe mold. Alternatively, a layer of paper can be used to separate the PE film from the mold to prevent the PE film from being damaged.

[0099] The PE layer extends to one end of the body of the paper can 200, and when the paper can is flared, the inner side of the paper can is provided with a flange, and the PE layer is fused to the connecting surface of the PE layer at the flange. In the flared section, the inner side of the PE layer is also provided with an aluminum foil layer, an aluminum-plated paper layer, or a rough paper layer end surface. The outer side of the rough paper layer is provided with a packaging decoration layer, and the outermost side of the flared section is provided with an end surface of the packaging decoration layer.

[0100] The present application also provides a sealed can, which comprises the sealing structure described above. The two ends of the sealed can are provided with the cover described above, which is used to seal the two ends of the paper can by pressing, so that the pressure resistance of the sealed can reaches more than 30Kp, and the air tightness of the sealed can reaches a high level.

[0101] The present application also provides a sealed can with a moisture-sensitive substance, which comprises the sealed can described above. The sealed can is used to encapsulate moisture-sensitive substances, such as chicken essence and sugar. The sealed can described above can be used to keep the moisture-sensitive substances dry for a long time, and the sealed can is convenient for long-term transportation and storage.

[0102] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the description of the present application, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0103] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0104] In addition, the terms "first", "second", etc. are used only for the purpose of description and do not imply or imply relative importance or imply the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0105] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0106] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be indirectly contacted through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be the first feature directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature can be the first feature directly below or obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0107] Although the embodiments of the present application have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-mentioned embodiments within the scope of the present application.

Claims

1. A container for granular material, characterized in that: The lid is sealed with a lid and has a closure for closing the lid and closing the lid, the closure being secured to the lid by a closure means. When the mounting surface of the blocking sheet is located around the blocking sheet, an air layer is formed between the blocking sheet and the first diaphragm in the area within the mounting surface, thereby forming a gap between the two. The first diaphragm is a concave-convex surface, and the through hole is formed by punching from one side of the first diaphragm to the other side of the body; the first diaphragm and the barrier sheet are embossed by an embossing member, wherein the male and female end surfaces of the embossing member are concave-convex, and uniformly spaced punching concave points are formed on the lower surface of the first diaphragm, and the cover body after the handle is shaped is sent into the mold of the embossing member for embossing, and the upper surface of the first diaphragm and the lower surface of the barrier sheet are pressed simultaneously by the concave-convex end surfaces of the upper and lower embossing members, wherein the end surface of the embossing member in contact with the upper surface of the first diaphragm is concave, and the end surface of the embossing member in contact with the lower surface of the barrier sheet is concave. The end face of the embossed part in surface contact is convex, and the first diaphragm is much thinner than the blocking sheet body. After pressing, a convex pattern of a stamped concave-convex surface is formed on the upper surface of the first diaphragm, and only stamped concave points instead of concave patterns are formed on the lower surface of the blocking sheet body. Moreover, during the pressing process, the through hole on the blocking sheet body will form an arc-shaped convex indentation on the upper surface of the first diaphragm that is consistent with the shape of the through hole. The first diaphragm and the blocking sheet body are embossed by the embossing part, so that the surface within the installation surface of the first diaphragm forms a convex pattern of a concave-convex surface, and the original uneven distribution is eliminated.

2. The container for granular material according to claim 1, characterized in that: The diameter of the through hole for pouring out the material ranges from 0.2 to 45.5 mm; one or more through holes are arranged near the edge of the cover body; the mounting surface is arranged around the blocking sheet body, so that at least one of the through holes is sealed with a hot melt adhesive layer and / or at least one of the through holes is located in a non-hot melt adhesive sealing area.

3. The container for granular material according to claim 2, characterized in that: The thickness of the first diaphragm is 0.01 to 0.09 mm, the thickness of the main body at the barrier sheet is 0.1 to 0.5 mm, and a plastic layer is formed on the side of the first diaphragm facing the barrier sheet, and the thickness of the plastic layer is 0.001 to 0.01 mm.

4. The container for granular material according to claim 3, characterized in that: There are multiple through holes, which are evenly arranged, and the spacing between the through holes is 1.3 to 5 times greater than the radius of the through holes; a large through hole is also provided on the corresponding side of the multiple through holes for inserting a spoon.

5. The container for granular material according to claim 4, characterized in that: The first membrane sheet is provided with a handle portion, which is integrally connected to the first membrane sheet, connected to the edge of the first membrane sheet, and its free end is folded toward the first membrane sheet to form a local double-layer membrane structure; the structure is located on the side where the multiple through holes are located, and when the handle tears the first membrane sheet, the through holes can be exposed; and there is at least one through hole under the double-layer membrane structure.

6. The container for granular material according to claim 5, characterized in that: The covers are in a stacked state, with multiple identical covers stacked up and down or left and right. The first membrane sheet contacts the barrier sheet of the adjacent cover, and the double-layer membrane structure contacts the barrier sheet of the adjacent cover, thereby partially separating the adjacent covers.

7. A container for granular material, characterized in that: The invention comprises a container body with a material opening arranged upward and sealed at the bottom, wherein the material is poured into the container body from the material opening, and a top cover sealing portion is arranged on the container body, wherein the top cover sealing portion is sealedly connected to the container connecting portion of the container for holding granular material according to claim 1.

8. A container for granular material, characterized in that: The invention comprises a container for holding particulate material according to claim 1, and a container body, wherein the container body has a sealed connection portion sealed with the container connection portion of the cover body, and a moisture-sensitive material is contained in the sealed cavity enclosed by the cover body and the container body.

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