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Preparation method of polyethylene film for degradable shopping bag

A polyethylene film and shopping bag technology, which is applied in the field of preparation of polyethylene film for degradable shopping bags, can solve the problems of unsatisfactory degradation effect and poor mechanical properties of shopping bags, etc. Increased surface area and high catalytic efficiency

Inactive Publication Date: 2020-02-14
刘丹丹
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The patent (application number 201210465275.3) discloses a degradable environmentally friendly shopping bag, which is composed of plant starch, heavy calcium carbonate powder, alkene-methyl acrylate copolymer, low-density polyethylene and linear polyethylene. , the mechanical properties of the shopping bag prepared by it are not good, and its degradation effect is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A preparation method for a polyethylene film for degradable shopping bags, comprising the following steps:

[0017] (1) Refrigerate 30 parts of calcium carbonate in parts by weight at 2°C for 2 hours, take it out, put it into a high-energy ball mill for 5 minutes, then transfer it to 120°C for 1 hour, take it out, and put it into a microwave device in 1200W for 3min, take it out after cooling, mix it with 4 times its volume of deionized water, and adjust the pH to 9 with ammonia water, then add 10 parts of dopamine, 5 parts of carboxymethylcellulose, 5 parts of Porous composite catalyst, 4 parts of lignin, then stirred at 40°C and 500rpm for 20min, freeze-dried, and then crushed to a particle size of 100nm to obtain a calcium carbonate composite;

[0018] (2) Put 30 parts of the calcium carbonate compound obtained in step (1) into the reactor, add deionized water, then add 10 parts of toluene diisocyanate into it, react at 105°C and 300rpm for 2 hours, then cool down to...

Embodiment 2

[0024] A preparation method for a polyethylene film for degradable shopping bags, comprising the following steps:

[0025] (1) Refrigerate 40 parts of calcium carbonate in parts by weight at 3°C ​​for 3 hours, take it out, put it into a high-energy ball mill for ball milling for 8 minutes, then transfer it to 130°C for 2 hours, take it out, and put it into a microwave device In 1400W, treat it for 4min, take it out after cooling, mix it with 5 times its volume of deionized water, and use ammonia water to adjust the pH to 10, then add 12 parts of dopamine, 8 parts of carboxymethyl cellulose, 6 parts of Porous composite catalyst, 6 parts of lignin, then stirred at 45°C and 600rpm for 25min, freeze-dried, and then crushed to a particle size of 200nm to obtain a calcium carbonate composite;

[0026] (2) Put 40 parts of the calcium carbonate compound obtained in step (1) into the reactor, add deionized water, and then add 12 parts of toluene diisocyanate into it, react at 107°C and...

Embodiment 3

[0032] A preparation method for a polyethylene film for degradable shopping bags, comprising the following steps:

[0033] (1) Refrigerate 50 parts of calcium carbonate in parts by weight at 5°C for 3 hours, take it out, put it into a high-energy ball mill and mill it for 10 minutes, then transfer it to 140°C for 2 hours, take it out, and put it into a microwave device , treated at 1500W for 4min, took it out after cooling, mixed it with 6 times its volume of deionized water, and adjusted the pH to 10 with ammonia water, then added 15 parts of dopamine, 10 parts of carboxymethyl cellulose, 6 parts of Porous composite catalyst, 8 parts of lignin, then stirred at 50°C and 700rpm for 30min, freeze-dried, and then crushed to a particle size of 500nm to obtain a calcium carbonate composite;

[0034] (2) Put 50 parts of the calcium carbonate compound obtained in step (1) into the reactor, add deionized water, and then add 14 parts of toluene diisocyanate into it, react at 108°C and ...

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PUM

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Abstract

The invention discloses a preparation method of a polyethylene film for a degradable shopping bag, and particularly relates to the technical field of packaging materials; the polyethylene film prepared by the preparation method disclosed by the embodiment of the invention has good mechanical properties, and meanwhile, after the polyethylene film is accelerated to age by ultraviolet light for 10 days, the tensile strength and the elongation at break are obviously reduced, and the degradation degree is high; manganese dioxide, ferric chloride and nano titanium dioxide are doped, ammonia water and beta-cyclodextrin are used for preparing a composite catalyst, and the catalytic efficiency is high; meanwhile, under the action of beta-cyclodextrin, the composite catalyst is in a porous form, andthe catalytic efficiency of the composite catalyst is further improved.

Description

technical field [0001] The invention belongs to the technical field of packaging materials, in particular to a preparation method of a polyethylene film for degradable shopping bags. Background technique [0002] With the development of the petrochemical industry, polyethylene, polypropylene, polystyrene and other plastic products have quickly entered people's life and production due to their light weight, high strength, corrosion resistance and low price, and are widely used. Polyethylene (PE) is the most used in plastic packaging. my country's supermarkets, department stores, vegetable markets and other commodity retail places use a large number of plastic shopping bags every day, and at least 13,000 tons of oil are needed to produce these plastic bags every day. The extensive use of plastics also brings a large amount of solid waste. While human beings have created huge material wealth, they have also caused serious pollution to the ecological environment. [0003] The p...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L27/06C08L91/00C08L1/28C08L97/00C08L5/16C08K13/06C08K9/04C08K3/26C08K5/098C08K7/24C08J5/18B65D65/46
CPCB65D65/466C08J5/18C08J2323/06C08J2401/28C08J2405/16C08J2427/06C08J2491/00C08J2497/00C08K5/098C08K7/24C08K9/04C08K13/06C08K2003/265C08K2201/011Y02W90/10
Inventor 刘丹丹
Owner 刘丹丹
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