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Method for preparing PET film from waste PET material

A film and waste technology, which is applied in the field of using waste PET materials to prepare PET films, can solve the problems of difficult operation and difficult recycling of waste PET plastics, and achieve the effect of improving performance and increasing performance

Inactive Publication Date: 2020-05-12
陈志威
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that it is difficult to recycle waste PET plastics at present, and the problem of difficult operation is to provide a method for preparing PET film using waste PET materials

Method used

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  • Method for preparing PET film from waste PET material

Examples

Experimental program
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Effect test

preparation example Construction

[0029] A kind of method utilizing waste and old PET material to prepare PET film, this preparation method comprises the steps:

[0030] (1) Take the waste PET material for washing, drying, crushing, passing through a 200-mesh sieve, collecting the sieved particles, mixing the sieved particles with the mixed solvent at a mass ratio of 3 to 9:18, heating and dissolving, and adding 10 sieved particles ~15% mixture, stirring at 600r / min for 20min;

[0031] (2) After the stirring is finished, raise the temperature to 110-120°C, increase the pressure to 0.4-0.6MPa, keep it warm for 5 hours, cool down to 60-70°C, add 6-12% auxiliary agent of sieved particles, discharge, and collect the mixture. The mixture was rotary evaporated to remove the solvent, and the residue was collected;

[0032] (3) Filter the residue, collect the filter cake, dry it, grind it at 1200r / min for 30 minutes, collect the ground material, mix the ground material, mixed silane raw material and water at a mass r...

Embodiment 1

[0036] The mixed solvent is a mixture of phenol and tetrachloroethane in a volume ratio of 6:5.

[0037] The mixture of terephthalic acid and ethylene glycol is mixed in a mass ratio of 6:7.

[0038] The auxiliary agent is ammonium bicarbonate and urea mixed in a mass ratio of 7:5.

[0039] The mixed silane raw material is made by mixing vinyltriethoxysilane and dimethyldiethoxysilane in a mass ratio of 6:5.

[0040] The monomer is bishydroxyethyl terephthalate.

[0041] The catalyst is a mixture of titanium dioxide and antimony acetate in a mass ratio of 6:3.

[0042] A kind of method utilizing waste and old PET material to prepare PET film, this preparation method comprises the steps:

[0043] (1) Wash the waste PET material, dry, pulverize, pass through a 200-mesh sieve, collect the sieved particles, mix the sieved particles with the mixed solvent at a mass ratio of 9:18, heat to dissolve, and add 15% of the sieved particles For the mixture, stir at 600r / min for 20min; ...

Embodiment 2

[0049] The mixed solvent is a mixture of phenol and tetrachloroethane in a volume ratio of 6:5.

[0050] The mixture is made of terephthalic acid and ethylene glycol in a mass ratio of 6:5.

[0051]The auxiliary agent is mixed with ammonium bicarbonate and urea in a mass ratio of 7:4.

[0052] The mixed silane raw material is made by mixing vinyltriethoxysilane and dimethyldiethoxysilane at a mass ratio of 6:4.

[0053] The monomer is bishydroxyethyl terephthalate.

[0054] The catalyst is a mixture of titanium dioxide and antimony acetate in a mass ratio of 6:3.

[0055] A kind of method utilizing waste and old PET material to prepare PET film, this preparation method comprises the steps:

[0056] (1) Wash the waste PET material, dry, pulverize, pass through a 200-mesh sieve, collect the sieved particles, mix the sieved particles with the mixed solvent at a mass ratio of 3 to 9:18, heat to dissolve, and add 13 sieved particles % of the mixture, stirred at 600r / min for 20m...

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Abstract

The invention belongs to the technical field of waste recycling, and particularly relates to a method for preparing a PET film from a waste PET material. According to the invention, waste PET is usedas a basic material; by mixing a solvent, on one hand, the material can be dissolved; on the other hand, impurities can be removed. Then, a primary reaction is carried out through the mixture; trace new PET is formed, and waste is combined; under the high-temperature and high-pressure action, degradation is performed and the molecular weight is reduced to form micromolecular PET; meanwhile, gas making is conducted by using an auxiliary agent to make new PET enter the waste; then, silane polymerization is performed to form a polymer, and the polymer is modifed to improve the performance; and finally through the use of a catalyst, macromolecular PET is formed to improve the performance.

Description

technical field [0001] The invention belongs to the technical field of waste recycling, and in particular relates to a method for preparing PET films from waste PET materials. Background technique [0002] Waste polyethylene terephthalate (PET) film mainly refers to waste PET film before or after printing and PET composite film printed after compounding with PP or PE. In the process of recycling, since the waste PET film contains a large amount of ink (generally about 10-15wt%), it is difficult to deal with it; Pollution is an important environmental problem that needs to be solved urgently. [0003] At present, there are mainly chemical degradation methods or physical methods for the recycling of waste plastic PET films. Among them, for the chemical degradation method, there are mainly the following problems at present: the method has many steps, and there are many types of raw materials required, which is prone to secondary pollution and cannot be effectively recycled. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L67/02C08L83/07C08G63/183C08G77/20C08J11/08
CPCC08J5/18C08J11/08C08G77/20C08G63/183C08J2367/02C08J2483/07Y02W30/62
Inventor 陈志威岳琳霞邱煌庆
Owner 陈志威
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