Easily-decomposed environment-friendly packaging bag

Abstract

The utility model discloses an environment-friendly packaging bag easy to decompose. The environment-friendly packaging bag easy to decompose comprises a main face part, side edge parts and a bottom face contact part. The main surface part, the side edge part and the bottom surface contact part are connected with one another to define an installation cavity with an opening in one end; a handle is connected to the opening end, close to the mounting cavity, of the main surface part; an anti-skid layer is arranged outside the handle; each of the main surface part, the side edge part and the bottom surface contact part comprises a starch base layer, a tensile layer, a high-toughness layer, a degradation layer and an anti-static layer; the tensile layer is arranged on the outer surface of the starch base layer; the high-toughness layer is arranged on the outer surface of the tensile layer; the degradation layer is arranged on the outer surface of the high-toughness layer; the anti-static layer is arranged on the outer surface of the degradation layer; therefore, through the structural design and cooperation of the starch base layer, the stretch-resistant layer, the high-toughness layer, the degradation layer and the antistatic layer, the degradable plastic film has good biodegradability, stretch-resistant capability and relatively high toughness.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field technology of packing bag, especially an easy-to-decompose environment-friendly packing bag. BACKGROUND

[0002] The packing bag is a bag for packing various articles, which facilitates transportation and storage in the production and flow process and is widely used in daily life and industrial production. The commodity nature of the packing bag is also more and more obvious. The packing bag has become a special product that is no longer attached to the production of goods and a product that is widely used and cannot be separated from all goods. The packing bag has entered thousands of households, and the discarded plastic in garbage is more and more. Because the synthetic polymer is very stable, it is resistant to acid and alkali, does not rust and does not mold. If it is buried in the ground, it will not rot for hundreds of years. Therefore, the discarded plastic has become a serious public hazard.

[0003] Most of the current general packing bags cannot be directly degraded and treated, which will pollute the surrounding land and water quality, and long-term accumulation will cause great pollution to the environment. A green environment-friendly packing bag convenient for biodegradation has appeared on the market, which comprises a plastic gasket, a front piece is fixedly connected to one side of the upper surface of the plastic gasket, a rear piece is fixedly connected to the other side of the upper surface of the plastic gasket, and a side piece is fixedly connected to one end of the outer surfaces of the front piece and the rear piece. Through the setting of the cotton membrane layer, the high-temperature-resistant layer and the biodegradable layer, the cotton membrane layer can prevent external water from entering, and at the same time, the appearance of the packing bag is soft, and the visual level and stereoscopic effect are better. The biodegradable layer as a whole can be rapidly degraded under the action of biology, so as to protect the environment and improve the practicality of the packing bag. However, the packing bag convenient for biodegradation is affected by its own structure, and the toughness of the packing bag is poor, which leads to easy damage, thereby affecting the service life of the packing bag.

[0004] Therefore, it is necessary to study a new technical scheme to solve the above problems. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model provides an easy-to-decompose environment-friendly packing bag, which has good biodegradability, tensile resistance and high toughness through the structural design and cooperation of the starch-based layer, the tensile-resistant layer, the high-toughness layer, the degradation layer and the anti-static layer.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] The application discloses an easily-degradable environment-friendly packaging bag, which comprises a main face part, a side edge part and a bottom face contact part; the main face part, the side edge part and the bottom face contact part are connected with each other to form a cavity with an open end; a handle is connected to the main face part near the open end of the cavity; an anti-skid layer is arranged on the outside of the handle; the main face part, the side edge part and the bottom face contact part all comprise a starch-based layer, a tensile-resistant layer, a high-toughness layer, a degradable layer and an anti-static layer; the tensile-resistant layer is arranged on the outer surface of the starch-based layer; the high-toughness layer is arranged on the outer surface of the tensile-resistant layer; the degradable layer is arranged on the outer surface of the high-toughness layer; and the anti-static layer is arranged on the outer surface of the degradable layer.

[0008] As a preferred solution, the tensile-resistant layer is made of polylactide.

[0009] As a preferred solution, the high-toughness layer is made of natural rubber.

[0010] As a preferred solution, the degradable layer is made of polyhydroxyalkanoate.

[0011] As a preferred solution, the anti-static layer is made of fatty alcohol polyoxyethylene ether.

[0012] As a preferred solution, the anti-skid layer is made of water-based polyurethane or acrylate.

[0013] Compared with the prior art, the application has obvious advantages and beneficial effects, specifically, the starch-based layer, the tensile-resistant layer, the high-toughness layer, the degradable layer and the anti-static layer are designed and matched, the starch-based layer has good biodegradability, the tensile-resistant layer can increase the tensile resistance of the packaging bag body and prolong the service life of the packaging bag body, the high-toughness layer can increase the use strength of the packaging bag body and make the packaging bag body have high toughness, the degradable layer can increase the rapid degradation capacity of the packaging bag body, and the anti-static layer can isolate the static electricity on the external objects in the packaging bag.

[0014] To make the structure features and effects of the application clearer, the application will be described in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a front view of an embodiment of the application;

[0016] Figure 2 is a perspective view of an embodiment of the application;

[0017] Figure 3 is a sectional view of an embodiment of the application;

[0018] Figure 4 is another sectional view of an embodiment of the present application;

[0019] Figure 5 is Figure 3 is a local enlarged view of A in FIG. 1.

[0020] Explanation of the drawing:

[0021] 10, main face part 20, side edge part

[0022] 30, bottom surface contact part

[0023] 11, starch-based layer 12, stretch-resistant layer

[0024] 13, high-toughness layer 14, degradation layer

[0025] 15, anti-static layer

[0026] 16, handle 161, anti-slip layer. DETAILED DESCRIPTION

[0027] Please refer to Figures 1 to 5 , which shows the specific structure of an embodiment of the present application.

[0028] In the description of the present application, it should be noted that for orientation words, such as the terms "up", "down", "front", "back", "left", "right" and the like, the orientation and position relationship shown is based on the drawings or normal wearing and using, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific protection scope of the present application.

[0029] An easily degradable environment-friendly packaging bag, comprising a main face part 10, a side edge part 20 and a bottom surface contact part 30.

[0030] The main face part 10, the side edge part 20 and the bottom surface contact part 30 are connected to each other to form an open-ended installation cavity; the main face part 10 is connected with a handle 16 near the open end of the installation cavity; the outside of the handle 16 is provided with an anti-slip layer 161; preferably, the anti-slip layer 161 is made of water-based polyurethane or acrylic ester material. Its water-based polyurethane or acrylic ester water-based paint has the characteristics of low volatile organic compound emission, and when it is made into an anti-slip coating and coated on the surface of the handle 16, a anti-slip film is formed after drying, providing good anti-slip effect, and can be degraded in the natural environment after use.

[0031] The main surface part 10, the side edge part 20 and the bottom surface contact part 30 each comprise a starch-based layer 11, a tensile-resistant layer 12, a high-toughness layer 13, a degradable layer 14 and an anti-static layer 15; the starch-based layer 11, the tensile-resistant layer 12, the high-toughness layer 13, the degradable layer 14 and the anti-static layer 15 each adopt a high-molecular flexible material that can degrade in a natural environment, and can decompose in a natural environment, thereby playing an environmental protection role.

[0032] The tensile-resistant layer 12 is arranged on the outer surface of the starch-based layer 11; preferably, the tensile-resistant layer 12 is made of polylactide. In the embodiment, the tensile-resistant layer can also be mixed with the starch-based layer 11, and polylactide and starch both have a certain degradability, so that after being mixed, the degradation speed is accelerated in a natural environment or under composting conditions. Starch can provide more action sites for microorganisms, promote the degradation of polylactide, and make the blend have better environmental protection performance.

[0033] In the embodiment, polylactide can be mixed and matched by adopting solution blending or melt blending or in-situ polymerization blending, for example: solution blending: polylactide and starch are respectively dissolved in a suitable solvent, then the two solutions are mixed uniformly, and then a blend is obtained by evaporating the solvent or the like. Melt blending: polylactide and starch are melt-mixed at high temperature, and they are uniformly mixed by mechanical stirring or the like. In-situ polymerization blending: the starch is pretreated first, and then the polymerization reaction of lactide is carried out in the presence of the starch, so that polylactide is generated in-situ on the surface or inside of the starch, thereby realizing the close mixing of the two.

[0034] The high-toughness layer 13 is arranged on the outer surface of the tensile-resistant layer 12; preferably, the high-toughness layer 13 is natural rubber. In the embodiment, the starch-based layer 11, the tensile-resistant layer and the high-toughness layer 13 can also be mixed. The addition of polylactide and starch can improve the hardness and modulus of natural rubber to a certain extent, and enhance the mechanical strength of the material. At the same time, natural rubber can also improve the flexibility of polylactide and starch, so that the blend has a better balance of mechanical properties; natural rubber has good elasticity, flexibility and processing performance, but the oil resistance, water resistance and gas barrier property are relatively poor. Polylactide has good rigidity, transparency and thermal stability, and is biodegradable; it can be mixed by mechanical blending method or solution blending method or reactive blending method, for example, when the mechanical blending method is used, natural rubber, polylactide and starch are mechanically mixed in a mixing device according to a certain proportion, and they are uniformly mixed together through mechanical shearing force and friction. Alternatively, the solution blending method is used to dissolve natural rubber, polylactide and starch in a suitable solvent respectively, then mix the three solutions uniformly, and then obtain the blend by evaporating the solvent and the like; or the reactive blending method is used to add some reactive additives or initiators during the mixing process, so that certain chemical reactions occur between natural rubber, polylactide and starch, forming chemical bonds or crosslinking structures, thereby improving the bonding force and compatibility between them.

[0035] The degradation layer 14 is arranged on the outer surface of the high-toughness layer 13; preferably, the degradation layer 14 is polyhydroxyalkanoate. Polyhydroxyalkanoate is a different structure of aliphatic polyester synthesized by microorganisms through fermentation of various carbon sources, which has good biocompatibility, thermal stability and processing performance, and can be completely degraded by microorganisms in the natural environment; the polyhydroxyalkanoate can be arranged on the outer surface of the high-toughness layer 13 by coating method or surface enrichment method after blending modification or surface grafting method or lamination method;

[0036] The anti-static layer 15 is arranged on the outer surface of the degradation layer 14. Preferably, the anti-static layer 15 is a fatty alcohol polyoxyethylene ether material. Fatty alcohol polyoxyethylene ether has a certain surface activity, and the lipophilic group and hydrophilic group in its molecular structure can form a uniform adsorption film on the surface of the packaging bag. This film can adsorb moisture in the air to form a thin water film, and water has a certain conductivity, so it can conduct the static charge on the surface of the packaging bag, thereby playing an anti-static role; wherein the fatty alcohol polyoxyethylene ether can be mixed by solution blending or melt blending; the fatty alcohol polyoxyethylene ether and the polyhydroxyalkanoate are dissolved in a suitable organic solvent, such as chloroform, dichloromethane and the like, then the two solutions are mixed uniformly, and they are fully mixed by stirring, ultrasonic and the like, and then the blend of the two is obtained by volatilizing the solvent.

[0037] The utility model discloses a design emphasis lies in, it mainly is through starch base layer, tensile resistance layer, high tenacity layer, degradation layer and the structure design and cooperation of antistatic layer, utilize the design of starch base layer and have good biodegradability, utilize tensile resistance layer to be able to increase the tensile resistance of packing bag body, prolong the service life of packing bag body, utilize high tenacity layer, can increase the use intensity of packing bag body, make it have higher tenacity, utilize the design of degradation layer to be able to increase the quick degradation ability of packing bag body, utilize the design of antistatic layer to be able to insulate the static electricity of the outside article in packing bag, avoid its lead to this packing bag.

[0038] The above is only the preferred embodiment of the utility model, and does not make any limitation on the technical range of the utility model, so any slight modification, equivalent change and modification made according to the technical essence of the utility model to the above embodiment still belong to the range of the technical scheme of the utility model.

Claims

1. An easily decomposable environment-friendly packaging bag, characterized in that: The application relates to a bag, which comprises a main surface part, a side edge part and a bottom surface contact part; the main surface part, the side edge part and the bottom surface contact part are connected to each other to form an open-end installation cavity; a handle is connected to the open end of the installation cavity; an anti-skid layer is arranged outside the handle; the main surface part, the side edge part and the bottom surface contact part all comprise a starch base layer, a tensile resistance layer, a high toughness layer, a degradation layer and an anti-static layer; the tensile resistance layer is arranged on the outer surface of the starch base layer; the high toughness layer is arranged on the outer surface of the tensile resistance layer; the degradation layer is arranged on the outer surface of the high toughness layer; and the anti-static layer is arranged on the outer surface of the degradation layer. ​ 2. The easily decomposable environment-friendly packaging bag according to claim 1, characterized in that: The tensile resistance layer is made of polylactide.

3. The easily decomposable environment-friendly packaging bag according to claim 1, characterized in that: The high toughness layer is made of natural rubber.

4. The easily decomposable environment-friendly packaging bag according to claim 1, characterized in that: The degradation layer is made of polyhydroxyalkanoate.

5. The easily disintegrating environment-friendly packaging bag according to claim 1, characterized in that: The anti-static layer is made of a fatty alcohol polyoxyethylene ether.

6. The easily disintegrating environment-friendly packaging bag according to claim 1, characterized in that: The anti-skid layer is made of water-based polyurethane or acrylate.

Images