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A kind of environment-friendly plastic bag and preparation method thereof

A plastic bag, environmentally friendly technology, applied in the field of packaging bags, can solve the problems of consuming a large amount of food and affecting the normal application of food, and achieve the effect of accelerating the degradation speed, improving the mechanical properties and water resistance, and being easy to degrade.

Active Publication Date: 2022-04-22
深圳市正旺环保新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the source of starch is food. Using starch as a raw material for plastic bags means that a large amount of food will be consumed, which will affect the normal application of food.

Method used

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  • A kind of environment-friendly plastic bag and preparation method thereof
  • A kind of environment-friendly plastic bag and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A kind of preparation method of environment-friendly plastic bag:

[0046] S1. crush the almond shells with a pulverizer until the almond shells can pass through a 250-mesh sieve to obtain almond shell powder;

[0047] S2. Add 30kg of almond shell powder, 60kg of ethanol and 60kg of water into the reactor, mix and stir, heat to 80°C, stir for 5h, cool to 45°C after stirring, filter, separate the filtrate and filter residue, wherein the filter residue is at 50°C drying in an oven for 1 hour, and set aside; the filtrate was evaporated to dryness, and then dried in an oven at 50°C for 1 hour to obtain almond shell lignin;

[0048] S3. Add 4kg of almond shell lignin and 20kg of polycaprolactone into the internal mixer and mix them, banbury at 130°C for 5min, extrude and granulate with an extruder to obtain modified polycaprolactone;

[0049] S4. Add 15kg modified polycaprolactone, 7kg filter residue, 2.5kg glycerin and 0.6kg 2,6-di-tert-butyl-4-methylphenol into the mixer ...

Embodiment 2

[0051] A kind of preparation method of environment-friendly plastic bag:

[0052] S1. crush the almond shells with a pulverizer until the almond shells can pass through a 280-mesh sieve to obtain almond shell powder;

[0053] S2. Add 40kg of almond shell powder, 80kg of ethanol and 40kg of water into the reactor and mix and stir, heat to 90°C, stir for 3 hours, cool to 50°C after stirring, filter, separate the filtrate and filter residue, wherein the filter residue is at 50°C drying in an oven for 1 hour, and set aside; the filtrate was evaporated to dryness, and then dried in an oven at 50°C for 1 hour to obtain almond shell lignin;

[0054]S3. Add 8.8kg of almond shell lignin and 25kg of polycaprolactone into the internal mixer to mix, banbury at 110°C for 10min, extrude and granulate with an extruder to obtain modified polycaprolactone;

[0055] S4. Add 20kg modified polycaprolactone, 5kg filter residue, 3.3kg glycerin and 0.9kg 2,6-di-tert-butyl-4-methylphenol into the mi...

Embodiment 3

[0057] A kind of preparation method of environment-friendly plastic bag:

[0058] S1. crush the almond shells with a pulverizer until the almond shells can pass through a 250-mesh sieve to obtain almond shell powder;

[0059] S2. Add 40kg of almond shell powder, 60kg of ethanol and 45kg of water into the reactor, mix and stir, heat to 85°C, stir for 4 hours, cool to 55°C after stirring, filter, and separate the filtrate and filter residue, wherein the filter residue is at 50°C drying in an oven for 1 hour, and set aside; the filtrate was evaporated to dryness, and then dried in an oven at 50°C for 1 hour to obtain almond shell lignin;

[0060] S3. Add 9kg of almond shell lignin and 20kg of polycaprolactone into the internal mixer to mix, banbury at 120°C for 10min, extrude and granulate with an extruder to obtain modified polycaprolactone;

[0061] S4. 18kg modified polycaprolactone, 6kg filter residue, 4kg glycerin and 0.7kg 2,6-di-tert-butyl-4-methylphenol are added in the ...

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Abstract

The application relates to the field of packaging bags, and specifically discloses an environment-friendly plastic bag and a preparation method thereof. A method for preparing an environment-friendly plastic bag, comprising the following steps: S1. crushing almond shells to obtain almond shell powder; S2. mixing and stirring the almond shell powder, ethanol and water, heating to 80-90°C, and stirring for 3-20°C 5h, cool after stirring, filter, separate the filtrate from the filter residue, dry the filter residue for later use, evaporate the filtrate to obtain almond shell lignin; S3. mix almond shell lignin with polycaprolactone, banbury, and extrude Granulate to obtain modified polycaprolactone; S4. Mix and stir the modified polycaprolactone, filter residue, plasticizer and antioxidant, then add polyethylene and mix and stir evenly, banburying, extrusion granulation, blowing Film, made of environmentally friendly plastic bags. The preparation method has the advantages of obtaining a degradable plastic bag and reducing food consumption.

Description

technical field [0001] The application relates to the field of packaging bags, more specifically, it relates to an environment-friendly plastic bag and a preparation method thereof. Background technique [0002] In daily life, when people buy goods, they will use various packaging bags, the most commonly used of which are plastic bags, plastic bags are made of plastic materials such as polyethylene, which have the advantages of light weight and low price, and are very popular. Consumers and manufacturers welcome it, but because general plastic bags have a long degradation cycle and are difficult to handle, they have a great impact on the environment, so people are focusing on research and development of degradable plastic bags. [0003] Degradable plastics generally include photodegradable plastics and biodegradable plastics. Biodegradable plastics are plastics that are degraded by microorganisms such as bacteria, molds (fungi) and algae that exist in nature. Add biodegrada...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L67/04C08L51/00C08L97/02C08K5/13C08K5/053C08H7/00C08F289/00C08F220/20C08J5/18
CPCC08L23/06C08J5/18C08H6/00C08F289/00C08L2201/06C08L2205/035C08L2203/16C08J2323/06C08J2467/04C08J2451/00C08J2497/02C08L67/04C08L51/00C08L97/02C08K5/13C08K5/053C08F220/20
Inventor 郑瑞恋徐志彬郑宝如张坚洪
Owner 深圳市正旺环保新材料有限公司
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