Degradable plastic packaging bag

A technology for degrading plastics and packaging bags, which is applied in the field of plastic products, can solve the problems of insignificant degradation effect, increased air and moisture permeability, and changing plastics, and achieves benefits for popularization and application, reduced air and moisture permeability, and obvious degradation effect Effect

Inactive Publication Date: 2015-09-23
TIANJIN YOUZHI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, although there are various degradable plastic packaging bags on the market, tests have shown that most degradable plastic packaging bags generally begin to become thinner, lose weight, and lose strength after being exposed to the environment for 3 months, and gradually break into pieces. If these fragments are buried

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A degradable plastic packaging bag, which consists of 7 parts by weight of ethyl cellulose, 12 parts of polyethylene, 25 parts of modified starch, 23 parts of corn starch, 19 parts of sweet potato starch, 25 parts of polylactic acid, and 6 parts of calcium carbonate powder , 2 parts of lubricant, 4 parts of plasticizer, 2 parts of toughening agent, 3 parts of degradation accelerator, 4 parts of polyvinyl alcohol, 2 parts of chitosan, 3 parts of compatibilizer, 4 parts of polycaprolactone.

[0017] The preparation method of the above-mentioned degradable plastic packaging bag is carried out according to the following steps:

[0018] (1) Add 25 parts of modified starch, 23 parts of corn starch, and 19 parts of sweet potato starch into the high-mixer, adjust the speed of the high-mixer to 500 rpm, and adjust the heating temperature to 120 degrees to dehydrate until the water content drops to 2 %, the high mixer stops running;

[0019] (2) Adjust the heating temperature of...

Embodiment 2

[0025] A degradable plastic packaging bag, characterized in that, by weight parts: 12 parts of ethyl cellulose, 16 parts of polyethylene, 22 parts of modified starch, 18 parts of corn starch, 23 parts of sweet potato starch, 30 parts of polylactic acid, carbonic acid 7 parts of calcium powder, 4 parts of lubricant, 2 parts of plasticizer, 2 parts of toughening agent, 4 parts of degradation accelerator, 5 parts of polyvinyl alcohol, 2 parts of chitosan, 3 parts of compatibilizer, polycaprolactone 3 copies.

[0026] The preparation method of the above-mentioned degradable plastic packaging bag is carried out according to the following steps:

[0027] (1) Add 22 parts of modified starch, 18 parts of corn starch, and 23 parts of sweet potato starch into the high-mixer, adjust the speed of the high-mixer to 500 rpm, and adjust the heating temperature to 120 degrees to dehydrate until the water content drops to 2 %, the high mixer stops running;

[0028] (2) Adjust the heating tem...

Embodiment 3

[0034] A degradable plastic packaging bag, which consists of 14 parts by weight of ethyl cellulose, 18 parts of polyethylene, 22 parts of modified starch, 25 parts of corn starch, 19 parts of sweet potato starch, 35 parts of polylactic acid, and 6 parts of calcium carbonate powder , 4 parts of lubricant, 2 parts of plasticizer, 3 parts of toughening agent, 8 parts of degradation accelerator, 4 parts of polyvinyl alcohol, 3 parts of chitosan, 5 parts of compatibilizer, and 4 parts of polycaprolactone.

[0035] The preparation method of the above-mentioned degradable plastic packaging bag is carried out according to the following steps:

[0036] (1) Add 22 parts of modified starch, 25 parts of corn starch, and 19 parts of sweet potato starch into the high-mixer, adjust the speed of the high-mixer to 500 rpm, and adjust the heating temperature to 120 degrees to dehydrate until the water content drops to 2 %, the high mixer stops running;

[0037] (2) Adjust the heating temperatu...

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Abstract

The present invention belongs to the field of plastic products, and particularly relates to a biodegradable plastic packaging bag which is characterized by comprising the following components by weight: 5-15 parts of ethyl cellulose, 10-20 parts of polyethylene, 15-30 parts of modified starch, 15-30 parts of corn starch, 15-30 parts of sweet potato starch, 20-40 parts of polylactic acid, 2-10 parts of calcium carbonate powder, 1-5 parts of a lubricant, 1-5 parts of a plasticizer, 1-3 parts of a toughening agent, 1-10 parts of a degradation accelerator, 1-5 parts of polyvinyl alcohol, 2-5parts of chitosan, 1-5 parts of a compatibilizing agent and 2-6 parts of polycaprolactone. The biodegradable plastic packaging bag begins to thin, lose in weight, reduce in strength, then gradually splits into fragments after being exposed to the environment for two months, when these fragments are buried in garbage or soil, the degradation effect is very obvious; by addition of the plasticizer and the calcium carbonate powder, the added ingredients may enhance the tensile strength of the plastic packing tape, reduce the air and moisture permeability, and maintain the original characteristics of the plastic packaging bag.

Description

technical field [0001] The invention belongs to the field of plastic products, in particular to a degradable plastic packaging bag. Background technique [0002] Plastic packaging bags are polymer compounds made of monomers as raw materials through addition polymerization or polycondensation reactions. They are generally made of synthetic resins and additives such as fillers, plasticizers, stabilizers, lubricants, and colorants. In people's daily life, plastic packaging bags are widely used, but the "white pollution" caused by waste plastics is becoming more and more serious. With the enhancement of people's awareness of environmental protection, how to alleviate white pollution has become a topic of increasing concern. Degradable plastic packaging bag is an emerging plastic product in recent years. Its various properties can meet the requirements of use and have the characteristics of unchanged performance during the storage period. After use, it can be degraded into envir...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L1/28C08L23/06C08L3/04C08L3/02C08L29/04C08L5/08C08L25/10C08K13/02C08K3/26B65D65/46
CPCY02W90/10
Inventor 张晋华
Owner TIANJIN YOUZHI TECH CO LTD
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