Environment-friendly plastic bag and production process thereof

Abstract

The invention discloses an environment-friendly plastic bag and a production process thereof, the environment-friendly plastic bag is prepared from the following components: degradable plastic resin, an auxiliary A, an auxiliary B, an auxiliary C, a nano material and a high-molecular polymer, the production process comprises the following steps: putting the raw material components into an extruder, uniformly mixing by heating and stirring, and extruding molten plastic into a film by the extruder; the film is added into a blow molding machine for film blowing, and film paper is obtained; printing a pattern, cutting into a proper size, testing the indexes of size thickness, tensile strength and degradability, and packaging and warehousing qualified products; compared with the prior art, the plastic bag has the advantages that the plastic bag can be degraded, environmental pollution is reduced, and the tensile strength and the antibacterial property of the plastic bag can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of plastic bag production, in particular to an environmentally friendly plastic bag and a production process thereof. Background Art

[0002] Plastic bags are daily necessities in people's lives. They are generally made of high molecular compounds such as polystyrene, polypropylene, and polyvinyl chloride. Due to the excessive use of plastic bags and the low recycling value of plastic bags, the recycling of plastic bags is not in place, resulting in a huge waste of resources. According to statistics, about 10 million tons of various types of garbage enter the ocean every year through various means. As a major plastic consumer and producer, my country ranks first in the world in terms of plastic production and garbage emissions. Most of the raw materials of plastic products are now non-degradable materials. It takes about 100 to 200 years for non-degradable plastics to degrade naturally. These large amounts of non-degradable garbage will cause great harm to the ecological environment. The increasingly serious environmental pollution problem has made people begin to realize the importance of developing green, environmentally friendly and degradable plastic bags, so an environmentally friendly plastic bag and its production process were invented.

[0003] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the above technical defects and provide an environmentally friendly plastic bag and its production process, which can make the plastic bag degradable, reduce environmental pollution, and improve the tensile strength and antibacterial properties of the plastic bag.

[0005] In order to solve the above problems, the technical solution of the present invention is an environmentally friendly plastic bag and its production process: it comprises the following ingredients: degradable plastic resin, additive A, additive B, additive C, nanomaterials, and high molecular polymers; the composition of the ingredients in parts by weight specifically includes: 80-90 parts of degradable plastic resin, 1-5 parts of additive A, 0.5-2 parts of additive B, 0.1-1 parts of additive C, 1-3 parts of nanomaterials, and 5-9 parts of high molecular weight polymers.

[0006] Furthermore, the components include the following components by weight: 80 parts of degradable plastic resin, 1 part of auxiliary agent A, 0.5 part of auxiliary agent B, 0.1 part of auxiliary agent C, 1 part of nano material, and 5 parts of high molecular polymer.

[0007] Furthermore, the components include the following components by weight: 85 parts of degradable plastic resin, 3 parts of auxiliary agent A, 1.2 parts of auxiliary agent B, 0.6 parts of auxiliary agent C, 2 parts of nanomaterials, and 7 parts of high molecular polymer.

[0008] Furthermore, the components include the following components by weight: 80 parts of degradable plastic resin, 1 part of auxiliary agent A, 0.5 part of auxiliary agent B, 0.1 part of auxiliary agent C, 1 part of nano material, and 5 parts of high molecular polymer.

[0009] Furthermore, the degradable plastic resin includes polylactic acid, polybutylene succinate, and starch-based plastic, wherein the ratio of polylactic acid, polybutylene succinate, and starch-based plastic is 10:7:4.

[0010] Furthermore, the auxiliary agent A includes: a plasticizer, a lubricant, and an antioxidant, wherein the ratio of the plasticizer, the lubricant, and the antioxidant is 3:3:2; the auxiliary agent B includes: a toughener, an elastomer, a compatibilizer, and tributyl citrate, wherein the ratio of the toughener, the elastomer, the compatibilizer, and tributyl citrate is 2:6:3:1; the auxiliary agent C includes: an antibacterial agent, an additive, and a maleic anhydride grafted compatibilizer, wherein the ratio of the antibacterial agent, the additive, and the maleic anhydride grafted compatibilizer is 4:3:2.

[0011] Furthermore, the toughening agent is one or more of ethylene-vinyl acetate copolymer, polyvinyl alcohol, and thermoplastic polyurethane; and the elastomer is one or more of styrene-butadiene rubber and butadiene rubber.

[0012] Furthermore, the nanomaterial is nano calcium carbonate or nano silicon dioxide.

[0013] Furthermore, a production process of an environmentally friendly plastic bag is characterized by comprising the following steps:

[0014] S1. Put the raw material components into an extruder, mix them evenly by heating and stirring, and the extruder extrude the molten plastic into a film;

[0015] S2, adding the film into a blow molding machine for film blowing to obtain film paper and form a film bag shape;

[0016] S3, print the pattern and cut to the appropriate size, and test the size thickness, tensile strength and degradation index;

[0017] S4. Qualified products are packaged and put into storage;

[0018] The heating temperature of the extruder is 180-220° C., and the stirring speed is 1500-1800 r / min.

[0019] The advantages of the present invention compared with the prior art are:

[0020] 1. The present invention can improve the flexibility and impact resistance of plastics through additives A, additives B and additives C. The elastomer can increase the elasticity, toughness and processability of the raw materials. The antibacterial agent kills bacteria by destroying the cell structure of bacteria or inhibiting enzyme activity. The additives enhance the physical properties of plastic bags and improve the strength and stability of plastics. The nanomaterials improve the toughness and strength of plastics. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a process flow chart of the present invention. DETAILED DESCRIPTION

[0022] In order to make the contents of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0023] Embodiment 1

[0024] A production process for environmentally friendly plastic bags comprises the following steps: putting various raw material components into an extruder, mixing them uniformly by heating and stirring, and extruding the molten plastic into a film by the extruder, wherein the heating temperature of the extruder is 180°C and the stirring speed is 1500r / min.

[0025] The raw materials include the following ingredients: degradable plastic resin, additive A, additive B, additive C, nanomaterials, and high molecular polymers; the composition of the ingredients by weight specifically includes: 80 parts of degradable plastic resin, 1 part of additive A, 0.5 parts of additive B, 0.1 parts of additive C, 1 part of nanomaterials, and 5 parts of high molecular weight polymers.

[0026] S2, adding the film into a blow molding machine for film blowing to obtain film paper and form a film bag shape;

[0027] S3, print the pattern and cut to the appropriate size, and test the size thickness, tensile strength and degradation index;

[0028] S4. Qualified products are packaged and put into storage.

[0029] The degradable plastic resin includes polylactic acid, polybutylene succinate, and starch-based plastic, wherein the ratio of polylactic acid, polybutylene succinate, and starch-based plastic is 10:7:4, i.e. 38 parts of polylactic acid, 27 parts of polybutylene succinate, and 15 parts of starch-based plastic.

[0030] The additive A includes: a plasticizer, a lubricant, and an antioxidant, wherein the ratio of the plasticizer, the lubricant, and the antioxidant is 3:3:2, that is, 0.375 parts of the plasticizer, 0.375 parts of the lubricant, and 0.25 parts of the antioxidant.

[0031] Additive B includes: toughener, elastomer, compatibilizer, and tributyl citrate, wherein the ratio of toughener, elastomer, compatibilizer, and tributyl citrate is 2:6:3:1, i.e., 0.083 parts of toughener, 0.25 parts of elastomer, 0.125 parts of compatibilizer, and 0.0417 parts of tributyl citrate.

[0032] Additive C includes: antibacterial agent, additive, maleic anhydride grafted compatibilizer, wherein the ratio of antibacterial agent, additive, maleic anhydride grafted compatibilizer is 4:3:2, i.e., 0.044 part of antibacterial agent, 0.033 part of additive, and 0.023 part of maleic anhydride grafted compatibilizer.

[0033] The toughening agent is one or more of ethylene-vinyl acetate copolymer, polyvinyl alcohol and thermoplastic polyurethane; the elastomer is one or more of styrene-butadiene rubber and butadiene rubber; and the nanomaterial is nano calcium carbonate and nano silicon dioxide.

[0034] Additive A contains plasticizers, lubricants and antioxidants. Plasticizers can improve the flexibility and processing performance of plastic bags, lubricants can help the raw materials to be processed more smoothly, and antioxidants can prevent oxidation and degradation of raw materials during processing. They are necessary additives in plastic bag processing.

[0035] Additive B includes toughening agent, elastomer, compatibilizer and tributyl citrate. Toughening agent can improve the flexibility and impact resistance of plastics. Elastomer can increase the elasticity and toughness of raw materials. Compatibilizer helps the compatibility between polymers. Tributyl citrate can improve the flexibility and processability of plastics.

[0036] The antimicrobial agent, additive, and maleic anhydride grafted compatibilizer in additive C. The antimicrobial agent kills bacteria by destroying the cell structure of bacteria or inhibiting enzyme activity. The additive enhances the physical properties of the plastic bag and improves the strength and stability of the plastic. The maleic anhydride grafted compatibilizer is used for the compatibility of the materials to ensure that the antimicrobial agent and other additives can be evenly dispersed in the plastic matrix.

[0037] Nanomaterials include nano calcium carbonate and nano silicon dioxide, which improve the toughness and strength of plastics.

[0038] Embodiment 2

[0039] A production process for environmentally friendly plastic bags comprises the following steps: putting various raw material components into an extruder, mixing them uniformly by heating and stirring, and extruding the molten plastic into a film by the extruder, wherein the heating temperature of the extruder is 200°C and the stirring speed is 1650r / min.

[0040] The raw materials include the following ingredients: degradable plastic resin, additive A, additive B, additive C, nanomaterials, and high molecular polymers; the composition of the ingredients by weight specifically includes: 85 parts of degradable plastic resin, 3 parts of additive A, 1.2 parts of additive B, 0.6 parts of additive C, 2 parts of nanomaterials, and 7 parts of high molecular weight polymers.

[0041] S2, adding the film into a blow molding machine for film blowing to obtain film paper and form a film bag shape;

[0042] S3, print the pattern and cut to the appropriate size, and test the size thickness, tensile strength and degradation index;

[0043] S4. Qualified products are packaged and put into storage.

[0044] The degradable plastic resin includes polylactic acid, polybutylene succinate, and starch-based plastic, wherein the ratio of polylactic acid, polybutylene succinate, and starch-based plastic is 10:7:4, i.e. 41 parts of polylactic acid, 28 parts of polybutylene succinate, and 16 parts of starch-based plastic.

[0045] The additive A includes: a plasticizer, a lubricant, and an antioxidant, wherein the ratio of the plasticizer, the lubricant, and the antioxidant is 3:3:2, that is, 1.125 parts of the plasticizer, 1.125 parts of the lubricant, and 0.75 parts of the antioxidant.

[0046] Additive B includes: toughener, elastomer, compatibilizer, and tributyl citrate, wherein the ratio of toughener, elastomer, compatibilizer, and tributyl citrate is 2:6:3:1, i.e., 0.2 parts of toughener, 0.6 parts of elastomer, 0.3 parts of compatibilizer, and 0.1 parts of tributyl citrate.

[0047] Additive C includes: antibacterial agent, additive, maleic anhydride grafted compatibilizer, wherein the ratio of antibacterial agent, additive, maleic anhydride grafted compatibilizer is 4:3:2, i.e., 0.27 parts of antibacterial agent, 0.2 parts of additive, and 0.13 parts of maleic anhydride grafted compatibilizer.

[0048] Embodiment 3

[0049] A production process for environmentally friendly plastic bags comprises the following steps: putting various raw material components into an extruder, mixing them uniformly by heating and stirring, and extruding the molten plastic into a film by the extruder, wherein the heating temperature of the extruder is 220° C. and the stirring speed is 1800 r / min.

[0050] The raw materials include the following ingredients: degradable plastic resin, additive A, additive B, additive C, nanomaterials, and high molecular polymers; the composition of the ingredients by weight specifically includes: 90 parts of degradable plastic resin, 5 parts of additive A, 2 parts of additive B, 1 part of additive C, 3 parts of nanomaterials, and 9 parts of high molecular polymers.

[0051] S2, adding the film into a blow molding machine for film blowing to obtain film paper and form a film bag shape;

[0052] S3, print the pattern and cut to the appropriate size, and test the size thickness, tensile strength and degradation index;

[0053] S4. Qualified products are packaged and put into storage.

[0054] The degradable plastic resin includes polylactic acid, polybutylene succinate, and starch-based plastic, wherein the ratio of polylactic acid, polybutylene succinate, and starch-based plastic is 10:7:4, i.e. 42 parts of polylactic acid, 30 parts of polybutylene succinate, and 18 parts of starch-based plastic.

[0055] Additive A includes: plasticizer, lubricant, antioxidant, wherein the ratio of plasticizer, lubricant, antioxidant is 3:3:2, that is, 1.875 parts of plasticizer, 1.875 parts of lubricant, and 1.25 parts of antioxidant.

[0056] Additive B includes: toughener, elastomer, compatibilizer, and tributyl citrate, wherein the ratio of toughener, elastomer, compatibilizer, and tributyl citrate is 2:6:3:1, i.e., 0.33 parts of toughener, 1 part of elastomer, 0.5 parts of compatibilizer, and 0.17 parts of tributyl citrate.

[0057] The additive C includes: an antibacterial agent, an additive, and a maleic anhydride grafted compatibilizer, wherein the ratio of the antibacterial agent, the additive, and the maleic anhydride grafted compatibilizer is 4:3:2, i.e., 0.45 parts of the antibacterial agent, 0.33 parts of the additive, and 0.22 parts of the maleic anhydride grafted compatibilizer.

[0058] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. An environmentally friendly plastic bag, characterized by: The invention comprises the following ingredients: degradable plastic resin, auxiliary agent A, auxiliary agent B, auxiliary agent C, nano material and high molecular polymer; the components specifically comprise, by weight, 80-90 parts of degradable plastic resin, 1-5 parts of auxiliary agent A, 0.5-2 parts of auxiliary agent B, 0.1-1 parts of auxiliary agent C, 1-3 parts of nano material and 5-9 parts of high molecular weight polymer.

2. An environmentally friendly plastic bag according to claim 1, characterized in that: The components include the following components by weight: 80 parts of degradable plastic resin, 1 part of auxiliary agent A, 0.5 part of auxiliary agent B, 0.1 part of auxiliary agent C, 1 part of nano material, and 5 parts of high molecular polymer.

3. An environmentally friendly plastic bag according to claim 1, characterized in that: The components include the following components by weight: 85 parts of degradable plastic resin, 3 parts of auxiliary agent A, 1.2 parts of auxiliary agent B, 0.6 parts of auxiliary agent C, 2 parts of nano material, and 7 parts of high molecular polymer.

4. The environmentally friendly plastic bag according to claim 1, characterized in that: The components include the following components by weight: 90 parts of degradable plastic resin, 5 parts of auxiliary agent A, 2 parts of auxiliary agent B, 1 part of auxiliary agent C, 3 parts of nanomaterials, and 9 parts of high molecular polymer.

5. The environmentally friendly plastic bag according to claim 1, characterized in that: The degradable plastic resin includes polylactic acid, polybutylene succinate, and starch-based plastic, wherein the ratio of polylactic acid, polybutylene succinate, and starch-based plastic is 10:7:

4.

6. The environmentally friendly plastic bag according to claim 1, characterized in that: The auxiliary agent A includes: a plasticizer, a lubricant, and an antioxidant, wherein the ratio of the plasticizer, the lubricant, and the antioxidant is 3:3:2; the auxiliary agent B includes: a toughener, an elastomer, a compatibilizer, and tributyl citrate, wherein the ratio of the toughener, the elastomer, the compatibilizer, and tributyl citrate is 2:6:3:1; the auxiliary agent C includes: an antibacterial agent, an additive, and a maleic anhydride grafted compatibilizer, wherein the ratio of the antibacterial agent, the additive, and the maleic anhydride grafted compatibilizer is 4:3:

2.

7. An environmentally friendly plastic bag according to claim 6, characterized in that: The toughening agent is one or more of ethylene-vinyl acetate copolymer, polyvinyl alcohol, and thermoplastic polyurethane; the elastomer is one or more of styrene-butadiene rubber and butadiene rubber.

8. The environmentally friendly plastic bag according to claim 1, characterized in that: The nano material is one or more of nano calcium carbonate and nano silicon dioxide.

9. The production process of an environmentally friendly plastic bag according to claim 1, characterized in that: The following steps are involved: S1. Put the raw material components into an extruder, mix them evenly by heating and stirring, and the extruder extrude the molten plastic into a film; S2, adding the film into a blow molding machine for film blowing to obtain film paper and form a film bag shape; S3, print the pattern and cut to the appropriate size, and test the size thickness, tensile strength and degradation index; S4. Qualified products are packaged and put into storage.

10. The process for producing an environmentally friendly plastic bag according to claim 9, characterized in that: The heating temperature of the extruder is 180-220° C., and the stirring speed is 1500-1800 r / min.

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