Environment-friendly packaging bag

Abstract

The utility model discloses an environment-friendly packaging bag, which relates to the technical field of packaging bags and comprises an environment-friendly plastic bag body, the surface of the environment-friendly plastic bag body is provided with a photocuring pattern, and the environment-friendly plastic bag body comprises an enhanced hydrophobic antifouling material layer, a bio-based film with high oxygen and water vapor barrier property and a food-grade PLA (polylactic acid) and antibacterial agent composite material. The enhanced hydrophobic antifouling material layer is laid on one end face of the high-barrier oxygen and water vapor bio-based film, the food-grade PLA and antibacterial agent composite material is laid on the other end face of the high-barrier oxygen and water vapor bio-based film, and the enhanced hydrophobic antifouling material layer is the outer surface of the environment-friendly plastic bag body. The food-grade PLA and antibacterial agent composite material is the inner surface of the bag body of the environment-friendly plastic bag; according to the technical scheme provided by the utility model, the mechanical property and hydrophobicity are enhanced, the super-hydrophobic effect of the surface is realized, meanwhile, the biodegradability of the material is kept, and the packaging bag is ensured to realize the combination of high performance and environmental friendliness of the packaging material.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging bags, in particular to an environmentally friendly packaging bag. Background Art

[0002] With the increasing awareness of environmental protection and the increasingly serious problem of plastic pollution, the market is in urgent need of environmentally friendly packaging materials that can replace traditional plastics. Although the existing biodegradable packaging bags on the market have reduced environmental pollution to a certain extent, they often have problems such as insufficient strength and uncontrollable degradation speed. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an environmentally friendly packaging bag to solve the problems in the background technology.

[0004] In view of this, the utility model provides an environmentally friendly packaging bag, including an environmentally friendly plastic bag body, the surface of the environmentally friendly plastic bag body is provided with a light-cured pattern, the environmentally friendly plastic bag body includes an enhanced hydrophobic antifouling material layer, a bio-based film with a high barrier to oxygen and water vapor, and a food-grade PLA and antimicrobial agent composite material, the enhanced hydrophobic antifouling material layer is laid on one end surface of the bio-based film with a high barrier to oxygen and water vapor, the food-grade PLA and antimicrobial agent composite material is laid on the other end surface of the bio-based film with a high barrier to oxygen and water vapor, and the enhanced hydrophobic antifouling material layer is the outer surface of the environmentally friendly plastic bag body, and the food-grade PLA and antimicrobial agent composite material is the inner surface of the environmentally friendly plastic bag body;

[0005] The enhanced hydrophobic antifouling material layer comprises a nano material enhanced layer and a fluorinated polymer modified bio-based material layer, wherein the fluorinated polymer modified bio-based material layer is laid on one end surface of the nano material enhanced layer, and the nano material enhanced layer is connected to a bio-based membrane with high barrier to oxygen and water vapor.

[0006] Preferably, the light-cured graphic is at least one of a pattern and information.

[0007] Preferably, the bio-based membrane with high barrier to oxygen and water vapor comprises a polyhydroxyalkanoate material layer and a nanocellulose reinforced composite membrane, wherein the polyhydroxyalkanoate material layer is laid on one end of the nanocellulose reinforced composite membrane, and the polyhydroxyalkanoate material layer is connected to the nanomaterial reinforced layer.

[0008] Preferably, the food-grade PLA and antimicrobial agent composite material comprises a PLA matrix layer and an antimicrobial modified PLA blend material layer.

[0009] Preferably, folds are arranged in the middle of both sides of the bag body of the environmentally friendly plastic bag.

[0010] Preferably, the environmentally friendly plastic bag body is provided with a handle groove on the front end surface close to the opening and extending to the rear end surface.

[0011] It can be seen from the above technical solutions that the embodiments of the utility model have the following advantages:

[0012] The utility model discloses an environmentally friendly packaging bag, wherein the enhanced hydrophobic and antifouling material layer used is composed of two parts, wherein the bottom is a nano material enhancement layer, which enhances the mechanical properties and hydrophobicity of the material. The surface is a fluorinated polymer modified bio-based material layer, which achieves a super-hydrophobic effect on the surface while maintaining the biodegradability of the material. The bio-based membrane with high barrier to oxygen and water vapor is formed by bonding a polyhydroxyalkanoate material layer and a nano-cellulose enhanced composite membrane with environmentally friendly adhesive, and has good biodegradability and certain barrier properties. The nano-cellulose enhanced composite membrane further improves the barrier properties through the orderly arrangement of nano-cellulose, thereby ensuring that the packaging bag achieves a combination of high performance of the packaging material and environmental friendliness.

[0013] These features and advantages of the present invention will be disclosed in detail in the following specific implementation manners and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings:

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a partial cross-sectional schematic diagram of the bag body of the environmentally friendly plastic bag of the utility model.

[0017] Explanation of the accompanying reference numerals: 1. Environmentally friendly plastic bag body; 11. Reinforced hydrophobic and antifouling material layer; 111. Fluorinated polymer modified bio-based material layer; 112. Nanomaterial reinforced layer; 12. Bio-based membrane with high barrier to oxygen and water vapor; 121. Polyhydroxyalkanoate material layer; 122. Nanocellulose reinforced composite film; 13. Food-grade PLA and antibacterial agent composite material; 2. Crease; 3. Handle groove; 4. Photocured pattern. DETAILED DESCRIPTION

[0018] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0019] An environmentally friendly packaging bag according to an embodiment of the utility model will be described in detail below with reference to the accompanying drawings.

[0020] Example

[0021] For easier understanding, see Figure 1 to Figure 2 The utility model provides an embodiment of an environmentally friendly packaging bag, comprising an environmentally friendly plastic bag body 1, wherein the surface of the environmentally friendly plastic bag body 1 is provided with a light-cured pattern 4, and the light-cured pattern 4 does not require ink, which can reduce environmental pollution, and the environmentally friendly plastic bag body 1 comprises an enhanced hydrophobic antifouling material layer 11, a bio-based film 12 with a high barrier to oxygen and water vapor, and a food-grade PLA and antibacterial agent composite material 13, wherein the enhanced hydrophobic antifouling material layer 11 is laid on one end surface of the bio-based film 12 with a high barrier to oxygen and water vapor, and the food-grade PLA and antibacterial agent composite material 13 is laid On the other end face of the bio-based membrane 12 with high barrier to oxygen and water vapor, the enhanced hydrophobic antifouling material layer 11 is the outer surface of the environmentally friendly plastic bag body 1, and the food-grade PLA and antibacterial agent composite material 13 is the inner surface of the environmentally friendly plastic bag body 1; the enhanced hydrophobic antifouling material layer 11 includes a nano material enhanced layer 112 and a fluorinated polymer modified bio-based material layer 111, the fluorinated polymer modified bio-based material layer 111 is laid on one end face of the nano material enhanced layer 112, and the nano material enhanced layer 112 is connected to the bio-based membrane 12 with high barrier to oxygen and water vapor. The bio-based membrane 12 with high barrier to oxygen and water vapor includes a polyhydroxyalkanoate material layer 121 and a nanocellulose enhanced composite membrane 122, the polyhydroxyalkanoate material layer 121 is laid on one end of the nanocellulose enhanced composite membrane 122, and the polyhydroxyalkanoate material layer 121 is connected to the nano material enhanced layer 112.

[0022] It should be noted that the enhanced hydrophobic antifouling material layer 11 is composed of two parts. The bottom is a nano-material enhanced layer 112, which is usually made of nano-silicon dioxide or nano-clay, etc., and is uniformly dispersed in the bio-based resin by physical or chemical methods to enhance the mechanical properties and hydrophobicity of the material. The surface is a fluorinated polymer modified bio-based material layer 111, and a small amount of fluorinated chain segments are grafted onto a bio-based polymer such as PLA to achieve a super-hydrophobic effect on the surface while maintaining the biodegradability of the material. Bio-based membrane 12 with high barrier to oxygen and water vapor: It is composed of a polyhydroxyalkanoate material layer 121 and a nanocellulose enhanced composite membrane 122 bonded and composited with environmentally friendly glue. Polyhydroxyalkanoate (PHA) is a bio-based polymer material with good biodegradability and certain barrier properties; the nanocellulose enhanced composite membrane further improves the barrier properties through the orderly arrangement of nanocellulose, and the two are combined to form a strong oxygen and water vapor barrier. The use of food-grade PLA and antibacterial agent composite material 13 can ensure food contact safety while having antibacterial effects.

[0023] In an optional embodiment: the light-cured graphic 4 is at least one of a pattern and information.

[0024] It should be noted that the light-curing 3D printing technology is used to directly form the required pattern or information such as brand logo, product description, etc. on the surface of the environmentally friendly plastic bag body 1. This process does not require ink, thereby reducing environmental pollution.

[0025] In an optional embodiment: the food-grade PLA and antimicrobial agent composite material 13 includes a PLA matrix layer and an antimicrobial modified PLA blend material layer.

[0026] It should be noted that the inner layer of the food-grade PLA and antibacterial agent composite material 13 is composed of a PLA matrix layer and an antibacterial modified PLA blend material layer. PLA is used as the base material, and modified PLA with antibacterial function is added, such as natural antibacterial agents such as silver ions, to ensure food contact safety while having antibacterial effects.

[0027] In an optional embodiment: folds 2 are provided in the middle of both sides of the environmentally friendly plastic bag body 1 .

[0028] It should be noted that folds 2 are preset in the middle of both sides of the environmentally friendly plastic bag body 1 to facilitate users to easily fold the packaging bag according to needs, save space and improve portability.

[0029] In an optional embodiment: the front end surface of the environmentally friendly plastic bag body 1 close to the opening is provided with a handle groove 3 extending through the rear end surface.

[0030] It should be noted that a groove is formed from the front end surface close to the opening of the environmentally friendly plastic bag body 1 to the rear end surface to form a natural handle area. Users can directly carry the packaging bag through this handle groove 3, which increases the convenience of use without the need for additional handle materials, further embodying the concept of environmental protection.

[0031] The environmentally friendly plastic bag body 1 is laminated: each layer of material is prepared separately, and multi-layer composite is performed by special equipment, such as hot pressing or extrusion coating technology, to ensure that each layer fits tightly. The required pattern or information is directly formed on the surface of the environmentally friendly plastic bag body 1 by light-curing 3D printing technology, and then it is cut into a single packaging bag shape according to the design size and pasted with environmentally friendly glue, and folds and handle grooves are set at the required positions.

[0032] Working principle: The enhanced hydrophobic antifouling material layer 11 uses the bottom nanomaterial reinforcement layer 112 to provide physical support and enhance the mechanical strength of the packaging bag. The top fluorinated polymer modified bio-based material layer 111, through its low surface energy characteristics, prevents water droplets from spreading on the surface of the packaging bag, forming beads and sliding off, effectively preventing the attachment of water and oil stains and keeping the surface of the packaging bag clean. The introduction of nanomaterials enhances the hydrophobicity of the material, and at the same time is closely connected with the high barrier layer, ensuring the overall stability and durability. Then the bio-based membrane 12 with high barrier to oxygen and water vapor is composited by the polyhydroxyalkanoate material layer 121 and the nanocellulose reinforced composite membrane 122 to form an efficient gas and moisture barrier layer. Polyhydroxyalkanoate (PHA) itself has a certain barrier property, and the addition of nanocellulose further enhances the airtightness of the membrane through its fine structure, effectively blocking the penetration of oxygen and water vapor, protecting the internal items from oxidation and moisture, and extending the shelf life. Inside the food-grade PLA and antimicrobial agent composite material 13, the PLA matrix layer and the antimicrobial modified PLA blend material layer work together to provide a safe and antimicrobial internal environment. Antimicrobial agents such as natural substances such as chitosan are evenly distributed in PLA, which can inhibit or kill bacterial growth, prevent food contamination, and ensure food safety. The photocurable graphics 4 directly form patterns or information on the surface of the packaging bag, which not only improves the aesthetics and recognition of the product, but also reduces the use of ink, thereby reducing environmental pollution.

[0033] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An environmentally friendly packaging bag, characterized in that: The invention comprises an environmentally friendly plastic bag body (1), the surface of which is provided with a light-cured pattern (4), the environmentally friendly plastic bag body (1) comprising an enhanced hydrophobic antifouling material layer (11), a bio-based film (12) with a high barrier to oxygen and water vapor, and a food-grade PLA and antimicrobial agent composite material (13), the enhanced hydrophobic antifouling material layer (11) being laid on one end surface of the bio-based film (12) with a high barrier to oxygen and water vapor, the food-grade PLA and antimicrobial agent composite material (13) being laid on the other end surface of the bio-based film (12) with a high barrier to oxygen and water vapor, and the enhanced hydrophobic antifouling material layer (11) being the outer surface of the environmentally friendly plastic bag body (1), and the food-grade PLA and antimicrobial agent composite material (13) being the inner surface of the environmentally friendly plastic bag body (1); The enhanced hydrophobic antifouling material layer (11) comprises a nanomaterial enhanced layer (112) and a fluorinated polymer modified bio-based material layer (111); the fluorinated polymer modified bio-based material layer (111) is laid on one end surface of the nanomaterial enhanced layer (112), and the nanomaterial enhanced layer (112) is connected to a bio-based membrane (12) with high barrier to oxygen and water vapor.

2. An environmentally friendly packaging bag according to claim 1, characterized in that: The light-cured graphic (4) is at least one of a pattern and information.

3. The environmentally friendly packaging bag according to claim 1, characterized in that: The bio-based membrane (12) with high barrier to oxygen and water vapor comprises a polyhydroxyalkanoate material layer (121) and a nanocellulose reinforced composite membrane (122); the polyhydroxyalkanoate material layer (121) is laid on one end of the nanocellulose reinforced composite membrane (122), and the polyhydroxyalkanoate material layer (121) is connected to the nanomaterial reinforced layer (112).

4. The environmentally friendly packaging bag according to claim 1, characterized in that: The food-grade PLA and antimicrobial agent composite material (13) comprises a PLA matrix layer and an antimicrobial modified PLA blend material layer.

5. The environmentally friendly packaging bag according to claim 1, characterized in that: Folds (2) are provided in the middle of both sides of the environmentally friendly plastic bag body (1).

6. The environmentally friendly packaging bag according to claim 1, characterized in that: The environmentally friendly plastic bag body (1) is provided with a handle groove (3) on the front end surface close to the opening and extending to the rear end surface.

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