Environment-friendly fresh-keeping can packaging container and manufacturing method thereof

Abstract

The invention provides an environment-friendly fresh-keeping can packaging container and a manufacturing method thereof. 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 and its manufacturing method, particularly an environmentally friendly food preservation canning container and its manufacturing method. Background Technology

[0002] To address the environmental problems caused by plastic bottles made of polyethylene terephthalate (PET) (PET is non-biodegradable), containers made from biodegradable and environmentally friendly materials have been 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 using one-piece molding technology. While these PET bottles, made entirely of paper and using one-piece molding technology, have the advantages of being easy and quick to manufacture, their structural strength and pressure resistance are insufficient, making them unsuitable as soft drink bottles or for holding other pressurized beverages or liquids (such as sparkling water). Glass bottles and metal cans are another common type of container used for storing food or ingredients. While glass bottles can be recycled, they are easily broken and do not effectively block light or ultraviolet rays. Metal cans are generally made of tinplate, with a tin layer inside serving as the main protective layer. This layer isolates the food from the tin layer, preventing corrosion and blocking environmental factors, thus preventing the food from spoiling. However, metal cans are easily deformed or dented by external forces, which can affect their ability to preserve the freshness of stored food or ingredients.

[0003] Currently, containers made of biodegradable or recyclable materials (such as paper bottles) need to meet the following requirements in practice to overcome increasingly stringent environmental regulations and industry requirements, in order of priority: (1) each component is recyclable; (2) it is made using bio-based raw materials; and (3) it is biodegradable or biodegradable.

[0004] Currently, many eco-friendly containers that claim to be biodegradable or recyclable, although made of biodegradable or recyclable materials, often have components that are difficult to separate, making it impossible to classify and recycle each component separately and thus difficult to achieve the goal of complete recycling. Summary of the Invention

[0005] The technical problem to be solved by this application is to provide an environmentally friendly canned food packaging container that is fully recyclable, structurally robust, waterproof and airtight, suitable for storing food or ingredients, and provides good preservation effect, as well as a method for manufacturing the same.

[0006] To solve the above-mentioned technical problems, a preferred embodiment of the environmentally friendly food preservation canning container of this application includes:

[0007] An outer shell is made of a spiral paper tube, with a top opening at the top end and a bottom opening at the bottom end, and a first connecting part on the inner side wall of the outer shell.

[0008] An inner liner is placed inside an outer shell. The inner liner is a waterproof container. The inner liner has the following structure: 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 with the side wall. The top of the side wall is open to form a mouth. The outer edge of the mouth has an outwardly protruding flange. The flange is higher than the top opening of the outer shell. The outer side wall of the side wall has a second connecting part for connecting with the first connecting part.

[0009] An easy-open lid, used to close or open the can opening, is made of aluminum. The easy-open lid comprises: an aluminum cap, an opening flap, and a pull ring. The outer edge of the aluminum cap has an annular skirt that covers the flange of the inner liner, thereby assembling the easy-open lid to the inner liner and closing the can opening. The aluminum cap has an opening, which is normally closed by the opening flap. The pull ring is connected to one end of the opening flap, and when subjected to external force, the pull ring can cause the opening flap to detach from the aluminum cap, thereby exposing the opening.

[0010] A bottom cover, made of biodegradable plastic using injection molding technology, is detachably attached to the bottom opening of the outer shell.

[0011] This application also includes a method for manufacturing an environmentally friendly canned food packaging container, comprising the following steps:

[0012] An aluminum easy-open lid is prepared. The easy-open lid consists of an aluminum lid, an opening tab, and a pull ring. The outer edge of the aluminum lid has an annular skirt.

[0013] Prepare an outer shell, which is made of a spiral paper tube, with a top opening at the top end and a bottom opening at the bottom end, and a first connecting part on the inner side wall of the outer shell.

[0014] A bottom cover is made using biodegradable plastic;

[0015] A liner is made of bio-based polyester material polyethylene furanate (PEF) using blow molding technology. The liner has the following structure: 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 with 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 an outwardly protruding flange. The outer side wall of the side wall has a second connecting part for connecting with the first connecting part.

[0016] The inner liner is placed into the outer shell, with the flange higher than the top opening of the outer shell, and the second connecting part of the inner liner is connected to the first connecting part of the outer shell.

[0017] The bottom cover is detachably attached to the bottom opening of the housing to close the bottom opening; and

[0018] The ring-shaped skirt of the easy-open lid is wrapped around the flange of the inner liner, and then the easy-open lid is assembled into the inner liner and the can opening is sealed.

[0019] Preferably, the spiral paper tube serving as the outer shell is made of waterproof paper in a spiral winding manner.

[0020] Preferably, the waterproof paper is made of at least two layers of fiber paper, and the surface of the waterproof paper has a waterproof layer located on the inner wall of the spiral paper tube.

[0021] Preferably, the fiber extension directions of the two layers of fiber paper intersect.

[0022] Preferably, the first connecting part and the second connecting part are threaded structures.

[0023] Preferably, the bottom cover is constructed as follows: a bottom plate and an annular wall, the annular wall surrounding the outer periphery of the bottom plate, the annular wall including an inner side wall and an outer side wall, the bottoms of the inner side wall and the outer side wall being connected to each other as a whole, the radial cross-sectional shape of the annular wall being U-shaped, and 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 then assembled together.

[0024] The advantages and benefits of the environmentally friendly food preservation canning container and its manufacturing method proposed in this application are as follows: all components of the environmentally friendly food preservation canning container proposed in this application are made of recyclable and biodegradable materials, and each part can be disassembled and recycled separately, fully meeting the requirements of environmental protection and recycling. Furthermore, the environmentally friendly food preservation canning container proposed in this application has a robust structure, is waterproof and airtight, suitable for storing food or ingredients, and provides excellent preservation effects.

[0025] The other effects and embodiments of this application are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a structural diagram of one embodiment of the environmentally friendly food preservation canned packaging container of this application;

[0028] Figure 2This is an exploded structural diagram of the first embodiment of the environmentally friendly food preservation canned packaging container of this application;

[0029] Figure 3 yes Figure 2 A schematic diagram of the cross-sectional structure of an embodiment is shown.

[0030] Figure 4 This is an exploded structural diagram of the second embodiment of the environmentally friendly food preservation canning container of this application;

[0031] Figure 5 This is a cross-sectional structural diagram of part of the environmentally friendly food preservation can packaging container of this application, showing the fiber extension direction of the two layers of fiber paper.

[0032] Symbol Explanation

[0033] 10: Outer shell 11: Top opening

[0034] 12: Bottom opening 13: First connecting part

[0035] 14: Second thread 20: Inner liner

[0036] 21: Side wall 22: Bottom surface

[0037] 23: Mouth of the can 231: Flange

[0038] 24: Second connecting part; 30: Easy-open cover

[0039] 31: Aluminum cap; 311: Circular skirt.

[0040] 312: Opening 32: Opening plate

[0041] 33: Pull ring; 40: Bottom cover

[0042] 41: Base plate; 42: Annular wall

[0043] 421: Inner wall 422: Outer wall

[0044] 43: First thread 50: Waterproof paper

[0045] 51, 52: Fiber paper; 53: Waterproof layer

[0046] D1, D2: Fiber extension direction; G: Gap Detailed Implementation

[0047] In the embodiments described below, the positional relationships include: up, down, left, and right. Unless otherwise specified, they are all based on the direction shown by the components in the diagram.

[0048] Please refer to the following first. Figure 1 and Figure 2This is a structural diagram and an exploded view of one embodiment of the environmentally friendly food preservation canned packaging container of this application. A preferred embodiment of the environmentally friendly food preservation canned packaging container of this application includes: an outer shell 10, an inner liner 20, an easy-open lid 30, and a bottom lid 40.

[0049] The outer casing 10 is made of a spiral paper tube, with a top opening 11 at the top end and a bottom opening 12 at the bottom end. A first connecting portion 13 is located on the inner sidewall of the outer casing 10. In a preferred embodiment, the spiral paper tube uses waterproof paper 50 (see...). Figure 5 Those made using a spiral winding method; please refer to Figure 5 In a preferred embodiment, the waterproof paper 50 is made of fiber paper, which provides sufficient structural strength through its rich fibrous structure. Preferably, the waterproof paper 50 is made of at least two layers of fiber paper 51 and 52, the fiber extension directions D1 and D2 of the two layers of fiber paper 51 and 52 intersecting each other, and the two layers of fiber paper 51 and 52 overlapping and bonding together further increases its structural strength. The surface of the waterproof paper 50 has a waterproof layer 53, which is located on the inner wall of the spiral paper tube (see...). Figure 5 In a preferred embodiment, the waterproof layer 53 is formed by coating the surface of the waterproof paper 50 with a biodegradable material, such as polylactic acid (PLA), which can increase the waterproofness of the outer shell 10 and meet environmental protection requirements.

[0050] The inner liner 20 is essentially a waterproof container. The inner liner 20 is inserted into the outer shell 10. 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 to the side wall 21. The top end of the side wall 21 is open to form a can opening 23. The outer edge of the can opening 23 has an outwardly protruding flange 231. Preferably, after the inner liner 20 is inserted 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 sidewall of the sidewall 21 has a second connecting portion 24 for connecting with the first connecting portion 13. Preferably, the first connecting portion 13 and the second connecting portion 24 are threaded structures (but not limited thereto). The threaded structure can fix the inner liner 20 in the outer shell 10, and can also easily disassemble the inner liner 20 and the outer shell 10 for separate recycling. In other preferred embodiments, the first connecting portion 13 and the second connecting portion 24 are latching and groove structures that can be quickly snapped together or separated. Those skilled in the art to which this application pertains should be able to easily implement or replace these structures after understanding their technical features and effects.

[0051] In a preferred embodiment of this application, the inner liner 20 is made of bio-based polyester material, polyethylene 2,5-furanoate (PEF), and is manufactured using blow molding technology. In a further preferred embodiment, the inner liner 20, made of PEF material, is first injection molded into a blank, and then blow molded into a hollow inner liner 20. Food or ingredients stored in the inner liner 20, thanks to its waterproof and airtight properties, can be well preserved.

[0052] The easy-open lid 30 is made of aluminum and is used to close or open the can opening 23 of the inner liner 20. The easy-open lid 30 includes: an aluminum lid 31, an opening tab 32, and a pull ring 33; the outer edge of the aluminum lid 31 has an annular skirt 311, which covers the flange 231 of the inner liner 20 (see...). Figure 3 The aluminum cap 31 is then assembled into the inner liner 20 and the can opening 23 is sealed. The aluminum cap 31 has an opening 312. The opening tab 32 normally closes the opening 312. The pull ring 33 is connected to one end of the opening tab 32. When the pull ring 33 is pulled by an external force, it can cause the opening tab 32 to peel off the aluminum cap 31, thereby exposing the opening 312. Preferably, the size of the opening 312 depends on the purpose of this application. One embodiment of the opening 312 is, for example, a smaller opening for beverage cans, which is sufficient to pour out the liquid contained therein. In other embodiments, the size of the opening 312 can also be very 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 liner 20.

[0053] The bottom cover 40 is made of biodegradable plastic. Preferably, the biodegradable plastic is a bio-based polyester material, polyethylene furanate (PEF) or polybutylene succinate (PBS). The bottom cover 40 is made of biodegradable plastic by injection molding technology. As a preferred embodiment of this application, the bottom cover 40 is detachably attached to the bottom opening 12 of the outer shell 10.

[0054] Please see Figure 2 and Figure 3 A preferred embodiment of the bottom cover 40 includes: a bottom plate 41 and an annular wall 42, the annular wall 42 surrounding the outer periphery of the bottom plate 41, the annular wall 42 including 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 being integrally connected (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 wall 421 and the outer wall 422 for the bottom end of the outer shell 10 to be inserted into the gap G and then assembled together.

[0055] Please see Figure 4In another preferred embodiment, the bottom cover 40 is detachably attached to the bottom opening 12 of the outer casing 10 by means of a threaded structure, wherein the outer side of the annular wall 42 of the bottom cover 40 is provided with a first thread 43, and a second thread 14 is provided on the inner side wall of the outer casing 10 near its bottom opening 12, and the first thread 43 and the second thread 14 can be screwed together.

[0056] The method for manufacturing the environmentally friendly food preservation canning container proposed in this application includes the following steps:

[0057] An aluminum easy-open cover 30 is prepared. The easy-open cover 30 includes an aluminum cover 31, an opening piece 32 and a pull ring 33. The outer edge of the aluminum cover 31 has an annular skirt 311.

[0058] Prepare an outer shell 10, which is made of a spiral paper tube. The top end of the outer shell 10 has a top opening 11, the bottom end of the outer shell 10 has a bottom opening 12, and the inner sidewall of the outer shell 10 has a first connecting part 13.

[0059] A bottom cover 40 was prepared using biodegradable plastic;

[0060] A liner 20 is prepared by blow molding using bio-based polyester material polyethylene furanate (PEF). The 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 opening 23. The outer edge of the can opening 23 has an outwardly protruding flange 231. The outer side wall surface of the side wall 21 has a second connecting part 24 for connecting with the first connecting part 13.

[0061] The inner liner 20 is placed into the outer shell 10, the flange 231 is higher than the top opening 11 of the outer shell 10, and the second connecting part 24 of the inner liner 20 is connected to the first connecting part 13 of the outer shell 10.

[0062] The bottom cover 40 is detachably attached to the bottom opening 12 of the outer casing 10 to close the bottom opening 12; and

[0063] The annular skirt 311 of the easy-open lid 30 is wrapped around the flange 231 of the inner liner 20, thereby assembling the easy-open lid 30 into the inner liner 20 and sealing the can opening 23.

[0064] The embodiments and / or implementation methods described above are merely preferred embodiments and / or implementation methods for implementing the technology of this application, and are not intended to limit the implementation methods of the technology of this application in any way. Any person skilled in the art may make some modifications or alterations to other equivalent embodiments without departing from the scope of the technical means disclosed in this application, but these should still be regarded as the technology or embodiments that are substantially the same as those of this application.

Claims

1. An environmentally friendly canned food packaging container, characterized in that, The environmentally friendly fresh-keeping canned food packaging container includes: An outer shell is made of a spiral paper tube, the top of the outer shell has a top opening, the bottom of the outer shell has a bottom opening, and the inner sidewall of the outer shell has a first connecting part. An inner liner is inserted into the outer shell. The inner liner is a waterproof container. The inner liner has the following structure: 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 an outwardly protruding flange. The flange is higher than the top opening of the outer shell. The outer side wall of the side wall has a second connecting part for connecting with the first connecting part. An easy-open lid, used to close or open a can, is made of aluminum. The easy-open lid comprises: an aluminum cap, an opening flap, and a pull ring. The outer edge of the aluminum cap has an annular skirt that covers the flange of the inner liner, thereby assembling the easy-open lid to the inner liner and closing the can opening. The aluminum cap has an opening, which is normally closed by the opening flap. The pull ring is connected to one end of the opening flap, and when subjected to external force, the pull ring can cause the opening flap to peel off the aluminum cap, thereby exposing the opening. A bottom cover, made of biodegradable plastic by injection molding, is detachably attached to the bottom opening of the housing.

2. The environmentally friendly food preservation canning container according to claim 1, characterized in that, The spiral paper tube that serves as the outer shell is made of waterproof paper in a spiral winding manner.

3. The environmentally friendly food preservation canning container according to claim 2, characterized in that, The waterproof paper is made of at least two layers of fiber paper, and the surface of the waterproof paper has a waterproof layer located on the inner wall of the spiral paper tube.

4. The environmentally friendly food preservation canning container according to claim 3, characterized in that, The fiber extension directions of the two layers of fiber paper intersect.

5. The environmentally friendly food preservation canning container according to claim 1, characterized in that, The inner liner is made of bio-based polyester material, polyethylene furanate, using blow molding technology.

6. The environmentally friendly food preservation canning container according to claim 1, characterized in that, The first connecting part and the second connecting part are threaded structures.

7. The environmentally friendly food preservation canning container according to claim 1, characterized in that, The bottom cover is constructed as follows: a bottom plate and an annular wall. The annular wall surrounds the outer periphery of the bottom plate. The annular wall includes an inner side wall and an outer side wall. The bottoms of the inner side wall and the outer side wall are connected to each other as a whole. The radial cross-sectional shape of the annular wall 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 then assembled together.

8. A method for manufacturing an environmentally friendly canned food packaging container, characterized in that, The manufacturing method of the environmentally friendly fresh-keeping canned food packaging container includes: An aluminum easy-open lid is prepared, the easy-open lid comprising: an aluminum lid, an opening tab and a pull ring, the outer edge of the aluminum lid having an annular skirt; Prepare an outer shell, which is made of a spiral paper tube, the top end of the outer shell has a top opening, the bottom end of the outer shell has a bottom opening, and the inner sidewall of the outer shell has a first connecting part. A bottom cover is made using biodegradable plastic; A liner is made from bio-based polyester material, polyethylene furanate, using blow molding technology. The liner has the following structure: 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 an outwardly protruding flange. The outer side wall of the side wall has a second connecting part for connecting with the first connecting part. The inner liner is inserted into the outer shell, the flange is higher than the top opening of the outer shell, and the second connecting part of the inner liner is connected to the first connecting part of the outer shell. The bottom cover is detachably attached to the bottom opening of the housing to close the bottom opening; and The annular skirt of the easy-open lid is wrapped around the flange of the inner liner, thereby assembling the easy-open lid into the inner liner and sealing the can opening.

9. The method for manufacturing the environmentally friendly food preservation canning container according to claim 8, characterized in that, include: The spiral paper tube is made by spiral winding using waterproof paper with at least two layers of fiber paper. The surface of the waterproof paper has a waterproof layer located on the inner wall of the spiral paper tube.

10. The method for manufacturing the environmentally friendly food preservation canning container according to claim 9, characterized in that, The fiber extension directions of the two layers of fiber paper intersect.

11. The method for manufacturing the environmentally friendly food preservation canning container according to claim 8, characterized in that, The first connecting part and the second connecting part are threaded structures.

12. The method for manufacturing the environmentally friendly food preservation canning container according to claim 8, characterized in that, The bottom cover is constructed as follows: a bottom plate and an annular wall. The annular wall surrounds the outer periphery of the bottom plate. The annular wall includes an inner side wall and an outer side wall. The bottoms of the inner side wall and the outer side wall are connected to each other as a whole. The radial cross-sectional shape of the annular wall 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 then assembled together.

13. The method for manufacturing the environmentally friendly food preservation canning container according to claim 8, characterized in that, The aluminum cap has an opening, which is normally closed by a tab. A pull ring is connected to one end of the tab, and the tab can be pulled by an external force to peel the aluminum cap off, thereby exposing the opening.

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