A method for recycling and regenerating plastic through homogenization and chain extending

A technology of recycled plastics and waste plastics, applied in recycling technology, plastic recycling, etc., can solve the problems of poor uniformity and low quality of waste recycled plastics, achieve significant market application value, no environmental pollution, and small investment effects

Inactive Publication Date: 2017-10-24
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problems of poor uniformity and low quality of waste recycled plastics at present, the present invention provides a method for homogenizing and extending the chain to recycle recycled plastics, which can greatly improve the recovery rate of waste plastics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for homogenizing chain extension to recycle recycled plastics, the specific operation steps are as follows:

[0026] (1) Place the waste plastic in the reaction tank and soak it in the lye with a pH of 11 to remove oil and debris;

[0027] (2) Air-dry the waste plastics processed in step (1), and then crush them through a crusher;

[0028] (3) Put the waste plastic processed in step (2) into a boiler at 85-90°C for cooking;

[0029] (4) The plastic treated in step (3) is added with a viscosity-increasing chain extender, polyethylene oxide, and ethylene vinyl acetate copolymer, and is completely fused into a homogenized composite plastic in an internal mixer; the said The composition of the viscosity-increasing chain extender in parts by weight is: 15 parts of styrene; 15 parts of methacrylate; 8 parts of dicumyl peroxide; a chain transfer agent with a radial dimension of 100-500nm and a layer thickness of 10-50nm 25 parts of talcum powder; The total consumpti...

Embodiment 2

[0032] A method for homogenizing chain extension to recycle recycled plastics, the specific operation steps are as follows:

[0033] (1) Place the waste plastic in the reaction tank and soak it in the lye with a pH of 10 to remove oil and debris;

[0034] (2) Air-dry the waste plastics processed in step (1), and then crush them through a crusher;

[0035] (3) Put the waste plastic processed in step (2) into a boiler at 85-90°C for cooking;

[0036] (4) The plastic treated in step (3) is added with a viscosity-increasing chain extender, polyethylene oxide, and ethylene vinyl acetate copolymer, and is completely fused into a homogenized composite plastic in an internal mixer; the said The parts by weight of the viscosity-increasing chain extender consist of: 17 parts of styrene; 19 parts of methacrylate; 18 parts of dicumyl peroxide; 21 parts of muscovite with a radial size of 100-500nm and a layer thickness of 10-50nm. share;

[0037] (5) Put the homogenized composite plasti...

Embodiment 3

[0039] A method for homogenizing chain extension to recycle recycled plastics, the specific operation steps are as follows:

[0040] (1) Place the waste plastic in the reaction tank and soak it in the lye with a pH of 11 to remove oil and debris;

[0041] (2) Air-dry the waste plastics processed in step (1), and then crush them through a crusher;

[0042] (3) Put the waste plastic processed in step (2) into a boiler at 85-90°C for cooking;

[0043] (4) The plastic treated in step (3) is added with a viscosity-increasing chain extender, polyethylene oxide, and ethylene vinyl acetate copolymer, and is completely fused into a homogenized composite plastic in an internal mixer; The sticky chain extender consists of 17 parts by weight of styrene; 14 parts of methacrylate; 12 parts of dicumyl peroxide; the chain transfer agent Baiyun with a radial size of 100-500nm and a layer thickness of 10-50nm 22 parts; wherein the amount of viscosity-increasing chain extender is 20% of the qu...

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Abstract

A method for recycling and regenerating plastic through homogenization and chain extending is provided. Waste plastic is subjected to impurity removing with an alkali solution and impurity removing. Through adding polyoxyethylene and an ethylene-vinylacetate copolymer, and by utilizing the hydrophilic and hydrophilic properties of the added compounds, the waste plastic is homogenized. Furthermore, through a tackifying chain extender, continuous tackifying and chain extending under high pressure are performed to achieve further homogenization and chain extending of the waste plastic to obtain high-quality recycled regenerated plastic. During chain extending, nanometer layered inorganic particles are used so that strength of the regenerated plastic is improved from a nanometer level and the nanometer layered structure allows chain extending of the regenerated plastic to occur in a same microcosmic plane, thus guiding the generation direction of a chain extending direction. A product can obtain good chain extending effects. Through the method, quality of the waste plastic is improved. The method can be further popularized and applied in actual industrial production.

Description

technical field [0001] The invention relates to the field of plastic recycling, in particular to a method for homogenizing and chain-extending recycling of recycled plastics. Background technique [0002] my country's plastics industry is developing rapidly, and its annual output has exceeded 20 million tons, ranking second in the world and becoming a veritable plastic powerhouse. While the rapid development of the plastics industry has brought convenience to people's production and life, it has also brought negative effects - "white pollution". According to statistics, 70% to 80% of the general-purpose plastics in the total amount of plastics will be converted into waste plastics within 10 years, and 50% of the plastics will also be converted into waste plastics within two years. Because these waste plastics have a macromolecular structure, they are not easy to decompose and rot, and they are dispersed in nature for a long time, which will cause environmental pollution and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/00C08L71/02C08L23/08C08K3/34C08F289/00C08F212/08C08F220/18B29B9/06B29B17/00
CPCY02W30/62C08L101/00B29B9/06B29B17/00B29B2017/0015C08F289/00C08K2201/003C08K2201/011C08L2205/03C08L2207/20C08L71/02C08L23/0853C08K3/34C08F212/08C08F220/18
Inventor 陈庆曾军堂陈兵
Owner CHENDU NEW KELI CHEM SCI CO LTD
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