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Environment-friendly degradable plastic packaging bag and preparation process thereof

A technology for degrading plastics and a preparation process, which is applied in the field of packaging bag preparation, can solve the problems of unsolved degradation of plastic films and cannot be completely degraded, and achieves the effects of good plastic performance, high environmental protection and wide sources.

Pending Publication Date: 2022-05-13
太仓市缘福汽配有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, biodegradable components, such as starch, are often added to the plastic raw materials to promote the degradation of the packaging bag; however, this method can only degrade the degradable components in the packaging bag, while the non-degradable components in the plastic film It can't be completely degraded, but it just divides the large sheet of plastic film into small granular non-degradable film, which does not solve the degradation effect of plastic film in essence.

Method used

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  • Environment-friendly degradable plastic packaging bag and preparation process thereof
  • Environment-friendly degradable plastic packaging bag and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation process for an environmentally friendly degradable plastic packaging bag, comprising the following processing steps:

[0021] S1: Take 10 parts of nano-cellulose, 0.5 parts of nano-titanium dioxide, 0.5 parts of phosphotungstic acid, 1 part of manganese stearate and 10 parts of citric acid ester and mix them in a ball mill to obtain mixture A;

[0022] S2: Mix mixture A, polylactic acid and polycaprolactone with a mass ratio of 1:0.5:0.5, and mix them evenly, and extrude them with a twin-screw extruder to obtain degradable masterbatches;

[0023] S3: 19 parts of polylactic acid and 19 parts of polycaprolactone were uniformly mixed, blown and molded by a co-extrusion blown film machine, printed and hot-cut to obtain an environmentally friendly and degradable plastic packaging bag, and the thickness of the packaging bag was 0.02 mm.

Embodiment 2

[0025] A preparation process for an environmentally friendly degradable plastic packaging bag, comprising the following processing steps:

[0026] S1: Take 30 parts of nano-cellulose, 1 part of nano-titanium dioxide, 1 part of phosphotungstic acid, 3 parts of manganese stearate and 15 parts of citric acid ester and mix them in a ball mill to obtain mixture A;

[0027] S2: Mix mixture A, polylactic acid and polycaprolactone with a mass ratio of 1:0.5:0.5, and mix them evenly, and extrude them with a twin-screw extruder to obtain degradable masterbatches;

[0028] S3: 25 parts of polylactic acid and 25 parts of polycaprolactone were evenly mixed, blown and molded by a co-extrusion blown film machine, printed and eagerly cut to obtain an environmentally friendly and degradable plastic packaging bag, and the thickness of the packaging bag was 0.02mm.

Embodiment 3

[0030] A preparation process for an environmentally friendly degradable plastic packaging bag, comprising the following processing steps:

[0031] S1: Take 40 parts of nano-cellulose, 0.7 parts of nano-titanium dioxide, 0.7 parts of phosphotungstic acid, 2 parts of manganese stearate and 13 parts of citric acid ester and mix them in a ball mill to obtain mixture A;

[0032] S2: Mix mixture A, polylactic acid and polycaprolactone with a mass ratio of 1:0.5:0.5, and mix them evenly, and extrude them with a twin-screw extruder to obtain degradable masterbatches;

[0033] S3: 12 parts of polylactic acid and 12 parts of polycaprolactone were evenly mixed, blown and molded by a co-extrusion blown film machine, printed and hot-cut to obtain an environmentally friendly and degradable plastic packaging bag, and the thickness of the packaging bag was 0.02mm.

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Abstract

The invention provides an environment-friendly degradable plastic packaging bag and a preparation process thereof, and belongs to the technical field of packaging bag preparation, and the environment-friendly degradable plastic packaging bag is characterized in that the environment-friendly degradable plastic packaging bag is made of an environment-friendly degradable plastic film; the environment-friendly degradable plastic film is prepared from the following components in parts by mass: 30 to 50 parts of polylactic acid; 30 to 50 parts of polycaprolactone; 10 to 30 parts of nano cellulose; 0.5 to 1 part of a biological active agent; 0.5 to 1 part of a photocatalyst; 1-3 parts of a thermal oxidation degradation accelerant; and 10-15 parts of a plasticizer. The environment-friendly degradable plastic packaging bag is composed of degradable raw materials, efficient biodegradability of the plastic packaging bag can be achieved, and the plastic packaging bag still has good plastic performance; the environment-friendly degradable plastic packaging bag is simple in preparation process, wide in source, high in environment-friendly effect and suitable for industrial large-scale popularization.

Description

technical field [0001] The invention belongs to the technical field of packaging bag preparation, and in particular relates to an environment-friendly degradable plastic packaging bag and a preparation process thereof. Background technique [0002] Packaging bags refer to bags used to pack various supplies, which make the goods convenient to transport and store during the production and circulation process, and are widely used in daily life and industrial production. Actual figures show that 80% of used plastic bags are eventually transported to landfills for disposal like general garbage, and only 7% of plastics are recycled. Due to the stable chemical properties of plastic bags, they can exist stably in the environment for a long time, causing a large number of plastic bags to accumulate in the environment, causing serious harm to the environment, such as white pollution, agricultural white cancer and other problems. The harm caused by plastic pollution is mainly in the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L1/02C08K3/22C08K3/32C08K5/098C08J5/18
CPCC08J5/18C08J2367/04C08J2467/04C08K2201/011C08K2003/2241C08K5/098C08K2003/328C08K2003/2296C08J2300/16C08J2400/16
Inventor 杨燕沈静
Owner 太仓市缘福汽配有限公司