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Method for recycling waste PET and producing environment-friendly type plastic shopping bags

An environmentally-friendly technology for shopping bags, which is applied in the production process of environmentally-friendly plastic shopping bags after recycling waste PET, can solve the problems of product inhomogeneity and insufficient overall strength, and achieve the effect of strengthening quality, better effect and balanced quality

Inactive Publication Date: 2016-11-30
周开雄
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, there are methods of using PET as a raw material to produce shopping bags and other braided materials, but PET is heated, melted, drawn into filaments and then shaped, or extruded into a film after melting and cut into filaments, all of which have inhomogeneous products, The overall strength is not high enough

Method used

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  • Method for recycling waste PET and producing environment-friendly type plastic shopping bags
  • Method for recycling waste PET and producing environment-friendly type plastic shopping bags

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] (1) Recycling waste plastic (PET):

[0073] Clean and crush the waste PET, clean the waste PET products, separate and detect the raw materials that meet the requirements, cut them into small pieces or strips, and then crush them into smaller pieces. The crushed pieces are sent to the dehumidifier Dryer for drying.

[0074] (2) Drawing:

[0075] The dried raw materials are blended with color masterbatch and flame retardant raw materials, heated and melted by heat medium, ultrasonically treated during melting, filtered after stirring, adjusted die temperature, passed through extruder substrate, cooled after extruding, Then cut into strips, then heated by the extension plate heater, then stretched longitudinally by the extension plate to form filaments, and then shaped by the shaping heater, cooled to normal temperature after shaping, passed through the speed-recycling roller, and then rolled by the winding machine After receiving the line, it can be packaged after passi...

Embodiment 2

[0121] In step (2) wire drawing, the parameters used are: the frequency of the ultrasonic waves is 5 MHz. The drying temperature should be 50°C for 30 minutes; extrude a substrate with a thickness of 0.5mm; the cooling temperature should be 20°C; use 80-mesh steel mesh for the filter. All the other uniform embodiment 1 is the same.

Embodiment 3

[0123] In step (2) wire drawing, the parameters used are: the frequency of the ultrasonic waves is 1 MHz. The drying temperature should be 60°C for 40 minutes; extrude a substrate with a thickness of 1mm; the cooling temperature should be 35°C; use 80-mesh steel mesh for the filter. All the other uniform embodiment 1 is the same.

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Abstract

The invention relates to a method for recycling waste PET and producing environment-friendly type plastic shopping bags. According to the technical scheme, the method includes the following steps of PET recycling, wiredrawing, weaving, printing, compounding, cutting, sewing and packaging. During wiredrawing, dried raw materials are matched with color master batches and flame retardant raw materials, heating and melting are conducted through a heating medium, and ultrasonic processing is adopted during melting. The method has the advantages that after waste PET is subjected to ultrasonic coprocessing during direct melting, melting rate is increased, the quality of produced products is more balanced, and wires are more uniform in strength; due to reasonable parameters, the effect of the products is better, and the quality of the products is strengthened.

Description

technical field [0001] The invention relates to a production technology of an environment-friendly plastic shopping bag, in particular to a production technology of an environment-friendly plastic shopping bag after recycling waste PET. Background technique [0002] PET (Chinese name is polyethylene terephthalate) mainly comes from waste PET film. Waste PET film is extremely difficult to recycle, with high cost and low efficiency. Almost no manufacturers are willing to recycle it, which has become a major problem in the recycling of waste PET materials. [0003] At present, the main treatment methods for waste PET in my country are simple physical methods such as landfill, incineration, crushing, and mechanical blending. The method of landfill requires a large space and occupies a large area, and it is easy to produce organic matter or volatilize harmful gases, polluting water sources and the atmosphere. With the increasing amount of discarded PET, it has been unable to ad...

Claims

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Application Information

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IPC IPC(8): B31B19/00B31B19/74B31B19/88B31B19/16B31B19/20B31B19/68D01D5/12D04C1/02C08L67/02C08J11/04B29B17/00
CPCB29B17/00C08J11/04C08J2367/02C08L67/02C08L2207/20D01D5/12D04C1/02D10B2331/04Y02P20/143Y02W30/62
Inventor 周开雄
Owner 周开雄
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