CN112810984A - Film bag body structure - Google Patents

Film bag body structure Download PDF

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Publication number
CN112810984A
CN112810984A CN201911118949.0A CN201911118949A CN112810984A CN 112810984 A CN112810984 A CN 112810984A CN 201911118949 A CN201911118949 A CN 201911118949A CN 112810984 A CN112810984 A CN 112810984A
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CN
China
Prior art keywords
film bag
layer
bag body
film
base layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911118949.0A
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Chinese (zh)
Inventor
吴铭远
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN201911118949.0A priority Critical patent/CN112810984A/en
Publication of CN112810984A publication Critical patent/CN112810984A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/02—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising animal or vegetable substances, e.g. cork, bamboo, starch
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/04—Bags or like containers made of paper and having structural provision for thickness of contents with multiple walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/02—Local reinforcements or stiffening inserts, e.g. wires, strings, strips or frames
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
    • Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Bag Frames (AREA)
  • Laminated Bodies (AREA)

Abstract

A film bag structure comprises a bag body, wherein the bag body is enclosed into an accommodating space by utilizing a substrate layer to enclose a film bag body for accommodating articles, and at least one toughening structure is formed on the substrate layer and is a geometric figure with the shape of a strip, a net, a convex surface and the like, so that the bag body is tough and not easy to break and break; or at least one strengthening layer is arranged on the surface of the substrate layer, and the strengthening layer can be combined with the surface of the substrate layer by using methods such as printing, coating, sticking and the like to form the toughness-resistant film bag body with low manufacturing cost.

Description

Film bag body structure
Technical Field
The invention relates to a film bag body, in particular to a film bag body containing a toughening structure or a strengthening layer, which is particularly suitable for general film bag bodies such as environment-friendly bags, plastic bags and the like.
Background
In general life, users want the bag body for packaging to be cheap, easy to use, strong, environment-friendly and clean, and after the bag is used, the bag is also wanted to be light and small, easy to store and arrange, so that most of plastic is still used as a bulk of the prior film bag.
Because the film bag mostly uses plastics as raw materials, and the more common bag body in the market at present has: polypropylene (PP), Polyethylene (PE), polyvinyl chloride (PVC), oriented polypropylene (OPP) films, and the like, generally referred to as plastic bags, are widely used for packaging articles in daily life because the plastic bags have the advantages of water resistance, sealing, lightness, difficulty in breakage, low cost, easiness in processing, and the like; even in many processing industries, plastic bags are often used as protection for certain objects to be processed.
However, people also find that the current troublesome environmental problems of energy problems, air pollution, marine garbage, food safety and the like are all related to plastics, so for the environmental protection issue, plant-degradable environmental-friendly plastic materials are used, for example: polylactic acid (PLA) is a thermoplastic aliphatic polyester; lactic acid or lactide required for producing polylactic acid (PLA) can be obtained by fermentation, dehydration and purification of renewable resources, the obtained polylactic acid generally has good mechanical and processing properties, and the polylactic acid product can be rapidly decomposed in various ways after being discarded.
However, the cost of the environment-friendly material is higher than that of the plastic, while the plastic bag is cheap, but the surface of the plastic bag is not tough enough, and the thickness of the plastic bag must be increased in order to enhance toughness, so that the production cost is increased and the plastic bag is not environment-friendly; therefore, how to design a film bag body, which can enhance the toughness without increasing the material thickness, can reduce the production cost and reduce the plastic for achieving the purpose of environmental protection no matter the bag body is made of plastic or environment-friendly materials, and is an important technical subject worth discussing.
Disclosure of Invention
In view of the problem that the common bag body in the prior art is not tough enough and easy to break, the invention provides a film bag body structure, which aims to enhance the toughness of the bag body and enable the bag body to be light, thin and practical, and comprises a bag body, wherein the bag body is enclosed into an accommodating space by utilizing a basal layer to form the film bag body for accommodating articles, and the basal layer is provided with at least one toughening structure which is a geometric figure (such as a strip shape, a net shape, a convex surface shape and the like) so as to enable the bag body to be tough and difficult to break and break; or at least one strengthening layer is arranged on the surface of the substrate layer, and the strengthening layer can be combined with the surface of the substrate layer by using methods such as printing, coating, sticking and the like to form the toughness-resistant film bag body with low manufacturing cost.
Drawings
FIG. 1 is a perspective view of a film bag structure according to an embodiment of the present invention.
FIG. 2-1 is a cross-sectional view of a film pouch structure according to an embodiment of the present invention.
Fig. 2-2 are further cross-sectional views of a film pouch structure according to an embodiment of the present invention.
FIG. 3 is a perspective view of a film bag structure according to an embodiment of the present invention.
FIG. 4-1 is a cross-sectional view of a film pouch structure according to an embodiment of the present invention.
Fig. 4-2 is another cross-sectional view of a film pouch structure according to an embodiment of the present invention.
FIG. 5-1 is a perspective view of a film bag body structure according to an embodiment of the present invention.
Fig. 5-2 is another perspective view of a film bag body structure according to an embodiment of the present invention.
FIG. 6 is a cross-sectional view of a film pouch structure according to an embodiment of the present invention.
FIG. 7 is a perspective view of a film bag structure according to an embodiment of the present invention.
FIG. 8 is a cross-sectional view of a film pouch structure according to an embodiment of the present invention.
FIG. 9 is a perspective view of a film bag structure according to an embodiment of the present invention.
Reference numerals
1 bag body
2 bag mouth
10 base layer
11 toughening structure
20 reinforcing layer
Detailed Description
Referring to fig. 1, a perspective view of a film bag structure according to an embodiment of the invention is shown.
The invention relates to a film bag body structure, which comprises a bag body 1, wherein the bag body 1 is provided with a base layer 10 made of light and thin materials, at least one toughening structure 11 is formed on the base layer 10, the toughening structure 11 is a geometric figure (such as a strip shape, a net shape, a convex surface and the like), the base layer 10 can be seen from the figure to surround an accommodating space to form the bag body 1, and the toughening structure 11 is formed on the base layer 10 by the original material, so that the toughness of the film bag body can be mainly increased, and the bag body 1 can have fracture resistance.
As shown in the drawings, the toughening structures 11 form a grid-like structure, so that the appearance of the substrate layer 10 appears to have a concave-convex surface, please refer to fig. 2-1, which is a cross-sectional view of a film bag structure according to an embodiment of the present invention, wherein the toughening structures 11 are disposed on the edge of the substrate layer 10, so that the toughening structures 11 protrude, and the substrate layer 10 can be set in a planar or concave form (but not limited to a specific form), and refer to fig. 2-2, which is another cross-sectional view of the present embodiment, and the surface of the film bag has different thicknesses; thus, the overall lightness and thinness of the base layer 10 is beneficial to reducing the production cost, and the protruding toughening structures 11 make the film bag body not easy to break and break.
The substrate layer 10 and the toughening structure 11 can be made of the same material, such as plastic bag (PE, PP), plastic rope, woven bag (PP), Nylon thread (Nylon), plastic (PE, PS, ABS), recycled paper plastic film (PE), leather, cotton thread, polylactic acid (PLA), straw paper, and plant decomposable environmental protection material, and the toughening structure 11 is bonded by any one of printing, coating, adhering, gluing, or hot melting.
In addition to the above-mentioned manner of producing the structure by using the film bag, without departing from the spirit of the present invention, another embodiment of the film bag structure of the present invention is shown in fig. 3, which is a perspective view of the film bag structure of an embodiment of the present invention.
The invention relates to a film bag structure, which comprises a bag body 1, wherein the bag body 1 is provided with a base layer 10 made of light and thin materials, the surface of the base layer 10 is provided with at least one reinforcing layer 20, the reinforcing layer 20 can be in a geometric figure (such as a strip shape, a net shape, a convex surface and the like), the base layer 10 is encircled to form an accommodating space to form the bag body 1, and the base layer 10 is provided with the reinforcing layer 20, so that the toughness of the film bag body can be mainly increased, and the bag body 1 can form fracture resistance.
As shown in the figure, the reinforcing layer 20 has a rhomboid lattice-like pattern, so that the appearance of the substrate layer 10 looks like a cross-hatched concave-convex surface, please refer to fig. 4-1, which is a cross-sectional view of the film bag structure according to an embodiment of the present invention, wherein the reinforcing layer 20 is disposed on the surface edge of the substrate layer 10, so that the reinforcing layer 20 protrudes from the substrate layer 10 made of a light and thin material, and the surface of the film bag looks like different thicknesses; the overall lightness and thinness of the base layer 10 is advantageous for reducing the production cost, and the protruding reinforcing layer 20 can be solid or hollow (see fig. 4-2), but is not limited to a specific form, so that the film bag is not easy to break.
However, the base layer 10 and the strengthening layer 20 in this embodiment are made of different materials, so the strengthening layer 20 can be made of different materials, wherein the materials can be two selected from plastic bags (PE, PP), plastic ropes, woven bags (PP), Nylon threads (Nylon), plastics (PE, PS, ABS), recycled paper plastic film residues (PE), skins, cotton threads, polylactic acid (PLA), straw paper, and plant decomposable environment-friendly materials, and the thin film bag is produced by bonding the strengthening layer 20 and the base layer 10 by any one of printing, coating, adhering, gluing, or hot melting.
In addition to the above-mentioned manner of the film bag structure, another embodiment of the film bag structure of the present invention is shown in fig. 5-1, which is a perspective view of the film bag structure of an embodiment of the present invention.
The invention relates to a film bag structure, which comprises a bag body 1, wherein the bag body 1 is provided with a base layer 10 made of light and thin materials, at least one toughening structure 11 (or a reinforcing layer 20) is formed on the base layer 10, the toughening structure 11 (or the reinforcing layer 20) is in a geometric figure (such as a strip shape, a net shape, a convex surface, and the like), the base layer 10 can be seen from the figure to surround a containing space to form the bag body 1, and the toughening structure 11 (or the reinforcing layer 20) is formed on the base layer 10, so that the toughness of the film bag body can be mainly increased, and the bag body 1 can have fracture resistance.
In the figure, the toughening structure 11 (or the strengthening layer 20) can form any pattern, so that the appearance of the film bag body is like a concave-convex surface, wherein the toughening structure 11 (or the strengthening layer 20) is convex, and the substrate layer 10 is integrally concave, so that the surface of the film bag body is seen to have different thicknesses; thus, the overall lightness and thinness of the substrate layer 10 is beneficial to reducing the production cost, the protruding toughening structure 11 (or the reinforcing layer 20) can make the film bag body not easy to break, and the substrate layer 10 and the toughening structure 11 (or the reinforcing layer 20) can be made of the same material and are similar to those in fig. 1, and the details are not repeated herein.
Besides the substrate layer 10 is connected to the tough structure 11 (or the reinforced layer 20) on the front side, the substrate layer 10 can also be connected to the tough structure 11 (or the reinforced layer 20) on the back side; if the toughening structure 11 (or the strengthening layer 20) is concave, and the substrate layer 10 is convex, the surface of the film bag body looks different in thickness; thus, the overall lightness and thinness of the substrate layer 10 is beneficial to reducing the production cost, and the concave toughening structure 11 (or the reinforcing layer 20) can make the film bag body not easy to break and break, in this case, the reinforcing layer 20 is disposed inside the bag body 1, as is apparent from the bag opening 2, please refer to fig. 5-2, which is another perspective view of the film bag body structure according to an embodiment of the present invention.
The film bag body of the invention not only has the concave-convex structure, but also can be permeated by the strengthening layer 20 into the substrate layer 10, so that the substrate layer 10 has the same smooth appearance as a common film bag body, but the permeation of the strengthening layer 20 can ensure that the film bag body is not easy to break and crack; the printing method is that drawing lines in a 3D printing mode and then drawing the lines into the reinforced layer 20 by hot dipping; or the cotton threads are glued by glue, or the straw paper is drawn to form the strengthening layer 20, and other production methods can be used; the film bag body can be made of various combined parts, such as polylactic acid (PLA) or other environment-friendly recycled materials, so that most parts of the film bag body can be punched and then connected with other parts, the cost can be effectively reduced, and the production mode is not limited by a special type and mode.
In addition to the above-mentioned manner of the film bag structure, another embodiment of the film bag structure of the present invention is shown in fig. 6, which is a cross-sectional view of the film bag structure of an embodiment of the present invention.
The present invention provides a film bag structure, which includes a bag body 1, the bag body 1 has a base layer 10 made of light and thin material, the upper surface of the base layer 10 is provided with a reinforcing layer 20, the reinforcing layer 20 can be washed away most of the area to form a geometric figure (such as a strip, a net, a convex surface, etc.), it can be seen from the figure that a containing space is formed by surrounding the base layer 10 to form the bag body 1, the base layer 10 is provided with the reinforcing layer 20, most of the area of the reinforcing layer 20 is washed away to reduce the use cost, and the reinforcing layer 20 can still maintain the toughness of the film bag body, so that the bag body 1 can form the fracture resistance, please refer to fig. 7, which is a perspective view of the film bag structure of an embodiment of the present invention.
Of course, in addition to the above-mentioned film bag structure of the present invention, there is a simple embodiment, wherein the film bag structure of the present invention includes a substrate layer 10 made of a light and thin material, and the surface of the substrate layer 10 can be punched out of a large area by, for example, a punching machine, to form a reinforcing structure 11 in a geometric pattern (such as a strip, a net, a convex surface, etc.), after the surface of the substrate layer 10 is punched out, the substrate layer 10 can reduce the use cost, and the reinforcing structure 11 formed on the surface can still maintain the toughness of the film bag body, so that the bag body can have the fracture resistance, and fig. 8 is a cross-sectional view of the film bag structure of an embodiment of the present invention.
Fig. 9 is a perspective view of a film bag structure according to an embodiment of the present invention, in which a base layer 10 can be used to form a geometric figure (such as a strip, a net, a convex surface, etc.), the bag structure can still hold solid articles, and the base layer 10 has toughness and is not easy to break and break, and the net bag in the figure is light and handy, and can effectively reduce the production cost.
From the foregoing description, it can be understood that the toughening structure (or the strengthening layer) of the film bag structure of the present invention can increase the toughness, so that the film bag can form the fracture resistance, and further the substrate layer can be made of light and thin material and reduce the production cost; although the present invention has been described with reference to the above preferred embodiments, the invention is not limited thereto, and the various components of the invention are not limited to the embodiments without departing from the spirit of the invention, for example, the toughening structure (or the reinforcing layer) is not limited to a specific form, and the toughening structure (or the reinforcing layer) is disposed on the front side (convex side), the back side (concave side), the double sides or the reinforcing layer penetrates into the substrate layer, or the material of the film bag is not limited to the type and number mentioned in the embodiments, so long as the invention does not depart from the scope of the claims, the invention can be modified and modified.

Claims (14)

1. A film bag structure, the bag comprising: the bag body is formed by surrounding an accommodating space and at least one base layer, wherein the surface of the base layer forms at least one toughening structure which is used for increasing the toughness of the base layer.
2. The film bag structure of claim 1, wherein the toughening structure is disposed on the front side or the back side of the substrate layer.
3. The film bag structure of claim 1, wherein the stiffening structure is a strip, a mesh, a convex, a geometric figure, or a combination thereof.
4. The film bag structure of claim 1, wherein the base layer and the stiffening structure are made of the same material, and the material comprises at least one of the following materials:
plastics (PE, PS, ABS), polylactic acid (PLA) or plant decomposable environment-friendly materials;
or
The substrate layer and the toughening structure are constructed as the following structures:
a plastic bag (PE, PP), a plastic rope, a woven bag (PP), Nylon thread (Nylon), recycled paper plastic residual film (PE), leather, cotton thread or straw paper.
5. The film bag structure of claim 1, wherein said toughening structure is bonded by printing, coating, adhering, gluing or hot melting.
6. The film bag structure of claim 1, wherein the surface of the base layer is formed by a punch press process to form the stiffening structure.
7. The film bag structure of claim 1, wherein the base layer further comprises a lattice structure.
8. A film pouch structure, wherein the pouch comprises:
at least one base layer, which is used to enclose an accommodation space to form the bag body; and
at least one strengthening layer, which is combined on the surface of the substrate layer and is used to increase the toughness of the substrate layer.
9. The film bag structure of claim 8, wherein the reinforcing layer is disposed on the front side, the back side or penetrates into the base layer.
10. The film bag structure of claim 8, wherein the reinforcing layer is a strip, a mesh, a convex surface, a geometric figure or a combination thereof.
11. The film bag structure of claim 8, wherein the material of the reinforcing layer is different from the material of the substrate layer, and the material of the reinforcing layer comprises the following:
plastics (PE, PS, ABS), polylactic acid (PLA) and plant decomposable environment-friendly materials are optionally combined;
or
The reinforced layer is constructed as the following optionally combined structures:
plastic bags (PE, PP), plastic ropes, woven bags (PP), Nylon threads (Nylon), recycled paper plastic residual films (PE), skins, cotton threads and straw paper.
12. The film bag structure of claim 8, wherein the reinforcing layer is bonded by printing, coating, gluing or hot melting.
13. The film bag structure of claim 12, wherein the printing is a 3D printing drawn line and then a heat-tack is applied to draw the reinforced layer.
14. The film bag structure of claim 8, wherein the surface of the reinforcing layer is formed by a punch press.
CN201911118949.0A 2019-11-15 2019-11-15 Film bag body structure Pending CN112810984A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911118949.0A CN112810984A (en) 2019-11-15 2019-11-15 Film bag body structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911118949.0A CN112810984A (en) 2019-11-15 2019-11-15 Film bag body structure

Publications (1)

Publication Number Publication Date
CN112810984A true CN112810984A (en) 2021-05-18

Family

ID=75851695

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911118949.0A Pending CN112810984A (en) 2019-11-15 2019-11-15 Film bag body structure

Country Status (1)

Country Link
CN (1) CN112810984A (en)

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Application publication date: 20210518