Environment-friendly fresh-keeping can packaging container

Abstract

The utility model provides an environment-friendly fresh-keeping can packaging container. The environment-friendly fresh-keeping can packaging container structurally comprises a shell, an inner container, an easy-to-pull cover and a bottom cover. A spiral paper tube is used for manufacturing a shell, a biomass polyester material polyethylene furanate is used for manufacturing an inner container, a can opening is formed in the top end of the inner container, the inner container is arranged in the shell, then the can opening of the inner container is sealed through an aluminum easy-to-pull cover, and a bottom cover made of biodegradable plastic is used for sealing an opening in the bottom end of the shell; all parts of the environment-friendly fresh-keeping can packaging container are made of recyclable and biodegradable materials and can be disassembled, classified and recycled, and the environment-friendly fresh-keeping can packaging container completely meets the environment-friendly and recycling requirements.

Description

Technical Field

[0001] This application relates to the structure of a container, in particular to an environmentally friendly fresh-keeping canned packaging container. Background Art

[0002] In order to solve the environmental problems caused by plastic bottles (or PET bottles) made of polyethylene terephthalate (PET) (PET cannot be naturally degraded), containers made of environmentally friendly materials that can be naturally degraded have been successively proposed and put into mass production. For example, manufacturers in the United States, the United Kingdom, the Netherlands, and Denmark have proposed paper PET bottles made entirely by one-piece molding technology. Although this kind of PET bottle made entirely of paper materials and through one-piece molding technology has the advantages of convenient and fast manufacturing, its structural strength and pressure resistance are insufficient and it cannot be used as a soda bottle or to hold other beverages or liquids with pressure (such as sparkling water). Glass bottles and metal cans are another common type of containers for storing food or ingredients. Among them, although glass bottles can be recycled, they are easy to break and are not easy to isolate light or ultraviolet rays; metal cans are generally tinplate cans, and the tin layer inside is the main protective layer, which can isolate food to prevent the iron layer from being eroded and can also block environmental influencing factors, making the internal food not easy to deteriorate. However, metal cans are easy to deform or dent due to external forces, which will affect the fresh-keeping effect of the stored food or ingredients.

[0003] At present, in practice, for such containers (such as paper bottles) made of materials that can be naturally degraded or recycled, the following requirements need to be met in order to overcome the increasingly strict environmental protection regulations and industrial requirements. The said requirements are in order of priority: (1) Each component can be recycled; (2) Manufactured using bio-based raw materials; and (3) Biodegradable or degradable.

[0004] At present, although many environmentally friendly containers that claim to be naturally degradable or recyclable are made of materials that can be naturally degraded or recycled, the various components of these environmentally friendly containers are usually difficult to separate, resulting in their inability to classify and recycle each component and making it difficult to achieve the goal of complete recycling. Summary of the Utility Model

[0005] The technical problem to be solved by this application is to provide an environmentally friendly fresh-keeping canned packaging container that can be completely recycled, has a strong structure, has the functions of waterproof and airtightness, is suitable for storing food or ingredients, and can provide a good fresh-keeping effect.

[0006] To solve the above technical problem, a preferred embodiment structure of the environmentally friendly fresh-keeping canned packaging container of this application includes:

[0007] An outer shell is composed of a spiral paper tube. The top end of the outer shell has a top opening, the bottom end has a bottom opening, and the inner side wall surface of the outer shell has a first connecting part;

[0008] An inner container is placed inside the outer shell. The inner container is a waterproof container, and its structure includes: a tubular side wall and a bottom surface. The bottom surface is located at the bottom end of the side wall and is integrally connected to the side wall. The top end of the side wall is open to form a can opening. The outer edge of the can opening has a flange protruding outward. The flange is higher than the top opening of the outer shell. The outer side wall surface of the side wall has a second connecting part for connecting to the first connecting part together;

[0009] An easy-open lid is used to close or open the can opening. It is made of aluminum. The structure of the easy-open lid includes: an aluminum lid, an opening piece, and a pull ring. The outer edge of the aluminum lid has an annular skirt. The annular skirt is used to wrap around the flange of the inner container, thereby assembling the easy-open lid on the inner container and closing the can opening. The aluminum lid has an opening. The opening piece normally closes the opening. The pull ring is connected to one end of the opening piece. The pull ring can drive the opening piece to peel off the aluminum lid when pulled by an external force, thereby exposing the opening; and

[0010] A bottom cover is made of biodegradable plastic by injection molding technology. The bottom cover is detachably combined with the bottom opening of the outer shell.

[0011] Preferably, the spiral paper tube serving as the outer shell is made of waterproof paper by spiral winding.

[0012] Preferably, the waterproof paper is made of at least two layers of fiber paper. The surface of the waterproof paper has a waterproof layer, and the waterproof layer is located on the inner side wall surface of the spiral paper tube.

[0013] Preferably, the fiber extending directions of the two layers of fiber paper intersect.

[0014] Preferably, the first connecting part and the second connecting part are threaded structures.

[0015] Preferably, the structure of the bottom cover includes: a bottom plate and an annular wall body. The annular wall body surrounds the outer periphery of the bottom plate. The annular wall body includes an inner side wall and an outer side wall. The bottoms of the inner side wall and the outer side wall are connected together integrally. The radial cross-sectional shape of the annular wall body is U-shaped. There is a gap between the inner side wall and the outer side wall for the bottom end of the outer shell to be inserted into the gap and combined together.

[0016] The advantages and effects of the environmentally friendly fresh-keeping canned packaging container of the present application are that all components of the environmentally friendly fresh-keeping canned packaging container proposed in the present application are made of recyclable and biodegradable materials, and each part can be disassembled and classified for recycling, fully meeting the requirements of environmental protection and recycling. On the other hand, the structure of the environmentally friendly fresh-keeping canned packaging container proposed in the present application is strong, with the functions of waterproof and airtight, suitable for storing food or ingredients, and can provide good fresh-keeping effects.

[0017] Details of other effects and embodiments of the present application are described below in conjunction with the drawings. Brief Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a structural diagram of an embodiment of the environmentally friendly fresh-keeping canned packaging container of the present application;

[0020] Figure 2 It is an exploded structural diagram of the first implementation manner of the environmentally friendly fresh-keeping canned packaging container of the present application;

[0021] Figure 3 It is Figure 2 A schematic cross-sectional structure diagram of the illustrated embodiment;

[0022] Figure 4 It is an exploded structural diagram of the second implementation manner of the environmentally friendly fresh-keeping canned packaging container of the present application;

[0023] Figure 5 It is a schematic cross-sectional structure diagram of a part of the environmentally friendly fresh-keeping canned packaging container of the present application, showing the fiber extension directions of two layers of fiber paper.

[0024] Symbol Description

[0025] 10: Outer shell 11: Top opening

[0026] 12: Bottom opening 13: First connecting part

[0027] 14: Second thread 20: Inner liner

[0028] 21: Side wall 22: Bottom surface

[0029] 23: Can mouth 231: Flange

[0030] 24: Second connecting part 30: Easy-open lid

[0031] 31: Aluminum lid 311: Ring-shaped skirt

[0032] 312: Opening 32: Opening piece

[0033] 33: Pull ring 40: Bottom lid

[0034] 41: Bottom plate 42: Ring-shaped wall body

[0035] 421: Inner wall 422: Outer wall

[0036] 43: First thread 50: Waterproof paper

[0037] 51, 52: Fiber paper 53: Waterproof layer

[0038] D1, D2: Fiber extension direction G: Gap Detailed implementation method

[0039] In the following implementation methods, the positional relationships described include: up, down, left, and right. Unless otherwise specified, they are all based on the directions in which the components are shown in the drawings.

[0040] First, please refer to Figure 1 and Figure 2 , which are the structural diagram and the structural decomposition diagram of an embodiment of the environmentally friendly fresh-keeping canned food packaging container of the present application. A preferred embodiment structure of the environmentally friendly fresh-keeping canned food packaging container of the present application includes: a housing 10, an inner container 20, an easy-open lid 30, and a bottom lid 40.

[0041] Among them, the housing 10 is composed of a spiral paper tube. The top end of the housing 10 has a top opening 11, the bottom end of the housing 10 has a bottom opening 12, and the inner wall surface of the housing 10 has a first connecting part 13; in a preferred implementation method, the spiral paper tube is made by using the waterproof paper 50 (see Figure 5 ); please refer to Figure 5 , in a preferred implementation method, the waterproof paper 50 is made of fiber paper, and the fiber structure rich in the fiber paper provides sufficient structural strength; preferably, the waterproof paper 50 is made of at least two layers of fiber paper 51, 52. The fiber extension directions D1 and D2 of the two layers of fiber paper 51, 52 intersect, and the two layers of fiber paper 51, 52 overlap and bond with each other to further increase its structural strength; the surface of the waterproof paper 50 has a waterproof layer 53, and the waterproof layer 53 is located on the inner wall surface of the spiral paper tube (see Figure 5), in a preferred embodiment of the waterproof layer 53, a biodegradable material, such as polylactic acid (PLA for short), is coated on the surface of the waterproof paper 50 to form the waterproof layer 53, which can increase the waterproof property of the outer shell 10 and meet the environmental protection requirements.

[0042] The inner container 20 is basically a waterproof container. The inner container 20 is placed into the outer shell 10. The structure of the inner container 20 includes: a tubular side wall 21 and a bottom surface 22. The bottom surface 22 is located at the bottom end of the side wall 21 and is integrally connected to the side wall 21. The top end of the side wall 21 is open to form a can mouth 23. The outer edge of the can mouth 23 has a flange 231 protruding outward. Preferably, after the inner container 20 is placed into the outer shell 10, the flange 231 is higher than the top opening 11 of the outer shell 10 (see Figure 3 ), the outer wall surface of the side wall 21 has a second connecting portion 24 for connecting to the first connecting portion 13 together. Preferably, the first connecting portion 13 and the second connecting portion 24 are a threaded structure (but not limited thereto). Through the threaded structure, the inner container 20 can be fixed in the outer shell 10, and the inner container 20 and the outer shell 10 can also be easily disassembled and recycled separately. In other preferred embodiments, the first connecting portion 13 and the second connecting portion 24 are a snap and groove structure that can be quickly snapped or separated from each other. Those with ordinary knowledge in the technical field to which this application belongs should be able to easily implement or replace them after understanding the technical features and effects of this application.

[0043] As a preferred embodiment of this application, the inner container 20 is made of a biobased polyester material, polyethylene 2,5-furanoate (PEF for short), and uses blow molding technology; in a preferred embodiment, the inner container 20 is made of PEF material. First, a blank is made by injection molding technology, and then the blank is made into a hollow inner container 20 by blow molding technology. Food or ingredients are stored in the inner container 20. Through the waterproof and airtight effects of the inner container 20, a good fresh-keeping effect can be provided.

[0044] The pull-tab lid 30 is made of aluminum material and is used to close or open the can mouth 23 of the inner container 20. The structure of the pull-tab lid 30 includes: an aluminum lid 31, an opening piece 32, and a pull ring 33; the outer edge of the aluminum lid 31 has an annular skirt 311, and the annular skirt 311 is used to cover the flange 231 of the inner container 20 (see Figure 3) Then, the easy-open lid 30 is assembled onto the inner container 20 and the can opening 23 is sealed. The aluminum lid 31 has an opening 312, and the opening piece 32 normally seals the opening 312. The pull ring 33 is connected to one end of the opening piece 32. The pull ring 33 can drive the opening piece 32 to peel off from the aluminum lid 31 when pulled by an external force, thereby exposing the opening 312; preferably, the size of the opening 312 depends on the use of this application. One embodiment of the opening 312, such as the smaller opening of a canned beverage, can pour out the contained liquid. In other embodiments, the size of the opening 312 can also be extremely close to the size of the can opening 23, which is suitable for quickly and conveniently pouring out the food or ingredients stored in the inner container 20.

[0045] The bottom cover 40 is made of biodegradable plastic. Preferably, the biodegradable plastic is a biopolyester material, polyethylene furanoate (PEF) or polybutylene succinate (PBS). The biodegradable plastic is selected and then the bottom cover 40 is made by injection molding technology. As a preferred embodiment of this application, the bottom cover 40 is detachably combined with the bottom opening 12 of the outer shell 10.

[0046] Please refer to Figure 2 and Figure 3 , a preferred embodiment structure of the bottom cover 40 includes: a bottom plate 41 and an annular wall 42. The annular wall 42 surrounds the outer periphery of the bottom plate 41. The annular wall 42 includes an inner side wall 421 and an outer side wall 422. The bottoms of the inner side wall 421 and the outer side wall 422 are connected together integrally (see Figure 3 ). The radial cross-sectional shape of the annular wall 42 is U-shaped, and there is a gap G between the inner side wall 421 and the outer side wall 422 for the bottom end of the outer shell 10 to be inserted into the gap G and then combined together.

[0047] Please refer to Figure 4 , in another preferred embodiment, the bottom cover 40 is detachably combined with the bottom opening 12 of the outer shell 10 through a threaded structure. Wherein, a first thread 43 is provided on the outer side of the annular wall 42 of the bottom cover 40, and a second thread 14 is provided on the inner wall surface of the outer shell 10 near its bottom opening 12. The first thread 43 and the second thread 14 can be screwed together.

[0048] The manufacturing method of the environmentally friendly fresh-keeping canned packaging container proposed in this application includes the following steps:

[0049] Prepare an easy-open lid 30 made of aluminum. The structure of the easy-open lid 30 includes: an aluminum lid 31, an opening piece 32 and a pull ring 33. The outer edge of the aluminum lid 31 has an annular skirt 311;

[0050] Prepare a housing 10, which is composed of a spiral paper tube. The top end of the housing 10 has a top opening 11, the bottom end of the housing 10 has a bottom opening 12, and the inner wall surface of the housing 10 has a first connecting portion 13;

[0051] Use biodegradable plastic to prepare a bottom cover 40;

[0052] Adopt the biopolyester material polyethylene furanoate (PEF) to prepare an inner liner 20 by blow molding technology. The structure of the inner liner 20 includes: a tubular side wall 21 and a bottom surface 22. The bottom surface 22 is located at the bottom end of the side wall 21 and is integrally connected with the side wall 21. The top end of the side wall 21 is open to form a can mouth 23. The outer edge of the can mouth 23 has a flange 231 protruding outward. The outer wall surface of the side wall 21 has a second connecting portion 24 for connecting with the first connecting portion 13 together;

[0053] Place the inner liner 20 into the housing 10. The flange 231 is higher than the top opening 11 of the housing 10. The second connecting portion 24 of the inner liner 20 is connected with the first connecting portion 13 of the housing 10;

[0054] Detachably combine the bottom cover 40 with the bottom opening 12 of the housing 10 to close the bottom opening 12; and

[0055] Wrap the annular skirt 311 of the pull tab 30 around the flange 231 of the inner liner 20, and then assemble the pull tab 30 on the inner liner 20 and close the can mouth 23.

[0056] The above-described embodiments and / or implementation manners are only used to illustrate the preferred embodiments and / or implementation manners for implementing the technology of this application, and do not impose any formal restrictions on the implementation manners of the technology of this application. Any person skilled in the art, without departing from the scope of the technical means disclosed in the content of this application, may make some changes or modifications to other equivalent embodiments, but should still be regarded as the same technology or embodiment as the essence of this application.

Claims

1. An environmentally friendly fresh-keeping canned food packaging container, characterized in that: The environmentally friendly fresh-keeping canned food packaging container comprises: A shell is formed by a spiral paper tube, the top end of the shell has a top opening, the bottom end of the shell has a bottom opening, and the inner side wall of the shell has a first connecting portion; An inner liner is placed in the outer shell, and the inner liner is a waterproof container. The structure of the inner liner includes: a tubular side wall and a bottom surface, the bottom surface is located at the bottom end of the side wall and connected to the side wall as a whole, the top end of the side wall is open to form a tank mouth, the outer edge of the tank mouth has a flange protruding outward, the flange is higher than the top opening of the outer shell, and the outer side wall surface of the side wall has a second connecting portion for connecting with the first connecting portion; an easy-open lid, used to close or open the can mouth, made of aluminum, the structure of the easy-open lid comprising: an aluminum lid, an opening piece and a pull ring; the outer edge of the aluminum lid has an annular skirt, the annular skirt is used to cover the flange of the inner liner, so that the easy-open lid is assembled to the inner liner and closes the can mouth, the aluminum lid has an opening, the opening piece normally closes the opening, the pull ring is connected to one end of the opening piece, and the pull ring can drive the opening piece to peel off the aluminum lid when pulled by an external force, so as to expose the opening; and A bottom cover is made of biodegradable plastic by injection molding technology and is detachably combined with the bottom opening of the shell.

2. The environmentally friendly fresh-keeping canned food packaging container according to claim 1, characterized in that: The spiral paper tube as the outer shell is made of waterproof paper in a spiral winding manner.

3. The environmentally friendly fresh-keeping canned food packaging container according to claim 2, characterized in that: The waterproof paper is made of at least two layers of fiber paper. The surface of the waterproof paper is provided with a waterproof layer, and the waterproof layer is located on the inner wall surface of the spiral paper tube.

4. The environmentally friendly fresh-keeping canned food packaging container according to claim 3, characterized in that: The fiber extension directions of the two layers of fiber paper intersect with each other.

5. The environmentally friendly fresh-keeping canned food packaging container according to claim 1, characterized in that: The liner is made of bio-based polyester material polyethylene furanoate and is made using blow molding technology.

6. The environmentally friendly fresh-keeping canned food packaging container according to claim 1, characterized in that: The first connection portion and the second connection portion are threaded structures.

7. The environmentally friendly fresh-keeping canned food packaging container according to claim 1, characterized in that: The structure of the bottom cover includes: a bottom plate and an annular wall body, which surrounds the outer periphery of the bottom plate, and includes an inner wall and an outer wall. The bottoms of the inner wall and the outer wall are connected to each other as a whole. The radial cross-section of the annular wall body is U-shaped, and there is a gap between the inner wall and the outer wall for the bottom end of the shell to be inserted into the gap and then combined together.

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