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PET composite material prepared from recycled PET plastic waste and application thereof

A technology of plastic waste and composite materials, which is applied in the field of PET plastic waste recycling, can solve the problems of difficult operation and low recycling efficiency, and achieve the effects of reducing pollution, high recycling, good mechanical properties and aging resistance

Active Publication Date: 2019-12-31
DONGGUAN YICHANG PLASTICS TEXTILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The recycling of waste plastics includes three stages: collection, sorting, and recycling. At this stage, the bottleneck restricting the recycling of waste plastics lies in the sorting of plastics. Even if there is a recycling process, the current recycling process needs to be It is carried out at high temperature, the operation is difficult, and the actual recycling efficiency is low

Method used

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  • PET composite material prepared from recycled PET plastic waste and application thereof
  • PET composite material prepared from recycled PET plastic waste and application thereof
  • PET composite material prepared from recycled PET plastic waste and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method for recycling PET plastic waste, comprising the steps of:

[0035] 1) Soak and wash the recovered waste PET plastics in clear water and chop them up, heat the chopped PET plastics to 90°C and cook for 20 minutes, and obtain PET plastic fragments after cooling for later use;

[0036] 2) Add the PET plastic fragments obtained in step 1) into a stirring device equipped with tetrahydrofuran, heat to 70°C, and stir for 60 minutes, then separate the PET plastic fragments from tetrahydrofuran, wash them with clean water, and set aside;

[0037] 3) Soak the PET plastic fragments treated in step 2) with sodium hydroxide with a concentration of 0.2mol / L for 2 hours, then soak and wash them with hydrochloric acid solution with a concentration of 0.2mol / L for 1 hour, rinse them with clean water, and dry them for later use , the drying temperature is 80°C;

[0038] 4) Put the PET plastic fragments dried in step 3) into the melting equipment and heat to 160°C to melt, then ...

Embodiment 2

[0058] A method for recycling PET plastic waste, comprising the steps of:

[0059] 1) Soak and wash the recovered waste PET plastics in clear water and then chop them up, heat the chopped PET plastics to 93°C for 25 minutes, and obtain PET plastic fragments after cooling for later use;

[0060] 2) Add the PET plastic fragments obtained in step 1) into a stirring device equipped with tetrahydrofuran, heat to 75°C, and stir for 75 minutes, then separate the PET plastic fragments from tetrahydrofuran, rinse them with clean water, and set aside;

[0061] 3) Soak the PET plastic fragments treated in step 2) with sodium hydroxide with a concentration of 0.25mol / L for 2.5h, then soak and wash with a hydrochloric acid solution with a concentration of 0.25mol / L for 5h, then rinse with clean water, and dry Dry for standby, the temperature during drying is 85°C;

[0062] 4) Put the PET plastic fragments dried in step 3) into the melting equipment and heat to 170°C to melt, then add the ...

Embodiment 3

[0082] A method for recycling PET plastic waste, comprising the steps of:

[0083] 1) Soak and wash the recovered waste PET plastics in clear water and chop them up, heat the chopped PET plastics to 95°C and cook for 30 minutes, and obtain PET plastic fragments after cooling for later use;

[0084] 2) Add the PET plastic fragments obtained in step 1) into a stirring device equipped with tetrahydrofuran, heat to 80° C., and stir for 90 minutes, then separate the PET plastic fragments from tetrahydrofuran, rinse them with clean water, and set aside;

[0085] 3) Soak the PET plastic fragments treated in step 2) with sodium hydroxide with a concentration of 0.3mol / L for 3 hours, then soak and wash them with hydrochloric acid solution with a concentration of 0.3mol / L for 2 hours, rinse them with clean water, and dry them for later use , the drying temperature is 90°C;

[0086] 4) Put the PET plastic fragments dried in step 3) into the melting equipment and heat to 180°C to melt, t...

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Abstract

The invention relates to the technical field of PET plastic waste recycling, in particular to a PET composite material prepared from recycled PET plastic waste and application thereof. The method includes the steps of: 1) washing, chopping and cooking waste PET plastic, performing cooling, then adding the material into a stirring device loaded with tetrahydrofuran, conducting heating, stirring, separation and flushing; 2) soaking the treated PET plastic fragments with sodium hydroxide, then performing soaking and washing with a hydrochloric acid solution, conducting cleaning, drying and melting, then adding a modified elastomer, and performing stirring to obtain a mixture A; 3) adding filler into the mixture A, and performing heating and stirring to obtain a mixture B; (4) adding a coupling agent, a lubricant and an antioxidant into the mixture B sequentially, conducting heating and mixing, and then adding a curing agent for mixing to obtain a mixture C; and (5) putting the mixture C into extrusion equipment, and conducting extrusion and granulation. The method adopted by the invention has high recycling rate, and the prepared PET composite material has excellent mechanical properties.

Description

technical field [0001] The invention relates to the technical field of PET plastic waste recycling, in particular to a PET composite material obtained by recycling PET plastic waste and its application. Background technique [0002] Plastic is a general term for daily necessities and industrial products processed with plastic as the main raw material, among which PET plastic bottles with high recycling value are the main ones. Due to the mass production, consumption and short use cycle of plastics, the amount of plastic waste has increased dramatically. A large amount of plastic waste not only causes a huge waste of resources, but also brings great harm to the environment: polluting the soil and oceans, and producing a large amount of toxic substances through incineration. Under the new situation of increasingly prominent energy problems and increasingly severe environmental problems, the research on strengthening the recycling of waste plastics has attracted great attentio...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L23/06C08L53/02C08L83/05C08K3/26C08K5/12C08K5/5425C08K3/36C08K7/14C08K13/04
CPCC08K2003/265C08K2201/014C08L67/02C08L2201/08C08L2205/035C08L23/06C08L53/02C08L83/04C08K3/26C08K5/12C08K5/5425C08K3/36C08K7/14C08K13/04
Inventor 王易意
Owner DONGGUAN YICHANG PLASTICS TEXTILE CO LTD
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