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Method for recycling retired car polyolefin plastic parts and components by virtue of chemical foaming

A chemical foaming and polyolefin technology, which is applied in the field of chemical foaming and recycling of retired automobile polyolefin plastic parts, can solve the problem of high production cost, save materials, avoid waste of resources and environmental pollution, and achieve a simple and reliable process. Effect

Inactive Publication Date: 2015-01-07
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the microcellular foaming methods mainly include supercritical foaming and chemical foaming. Supercritical foaming uses supercritical gas as a foaming agent, which requires special injection molding machines and supercritical gas equipment, and the production cost is relatively high.

Method used

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  • Method for recycling retired car polyolefin plastic parts and components by virtue of chemical foaming
  • Method for recycling retired car polyolefin plastic parts and components by virtue of chemical foaming
  • Method for recycling retired car polyolefin plastic parts and components by virtue of chemical foaming

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Recycling method of chemical foaming of decommissioned automobile polyolefin plastic parts

[0031] The method comprises the steps of:

[0032] (1) The decommissioned automobile polypropylene bumper obtained by dismantling is cleaned and broken;

[0033] (2) The bumper reclaimed material obtained by cleaning and crushing is placed in a high-speed mixer, and blended with 0.1 parts by weight of 1250 mesh calcium carbonate, 0.1 parts by weight of titanate coupling agent 131, and antioxidant 1010 for 5 minutes;

[0034] (3) Extrude and granulate the blended bumper recycled material mixture through a twin-screw extruder according to the following process: the first zone is 160°C, the second zone is 170°C, the third zone is 200°C, and the fourth zone is 190°C ℃, five zone 180 ℃, head temperature 180 ℃, screw speed 30r / min;

[0035] (4) Put AC foaming agent and low-density polyethylene (LDPE) in a high-speed mixer at a mass ratio of 1:4 and blend for 5 minutes;

...

Embodiment 2

[0039] Example 2: Recycling method of chemical foaming of decommissioned automobile polyolefin plastic parts

[0040] The method comprises the steps of:

[0041] (1) Clean and break the PP bumper of the decommissioned automobile obtained by dismantling;

[0042] (2) The bumper recycled material obtained by cleaning and crushing is placed in a high-speed mixer, and blended with 2500 mesh calcium carbonate of 8 parts by weight, silane coupling agent KH550 of 2 parts by weight, and antioxidant 168 for 15 minutes;

[0043] (3) Extrude the blended recycled material mixture through a twin-screw extruder to obtain recycled material masterbatch according to the following process: 180°C in the first zone, 190°C in the second zone, 220°C in the third zone, 210°C in the fourth zone, The fifth zone is 200°C, the head temperature is 200°C, and the screw speed is 100r / min;

[0044] (4) Put AC foaming agent and LDPE in a high-speed mixer at a mass ratio of 1:6 and blend for 15 minutes;

...

Embodiment 3

[0048] Example 3: Recycling method of chemical foaming of decommissioned automobile polyolefin plastic parts

[0049] The method comprises the steps of:

[0050] (1) Clean and break the PP bumper of the decommissioned automobile obtained by dismantling;

[0051] (2) The bumper recycled material obtained by cleaning and crushing is placed in a high-speed mixer, and blended with 15 parts by weight of 2500 mesh calcium carbonate, 5 parts by weight of PP-g-MAH, and antioxidant B215 for 30 minutes;

[0052] (3) Extrude and granulate the blended recycled material mixture through a twin-screw extruder to obtain the recycled material masterbatch: 190°C in the first zone, 200°C in the second zone, 230°C in the third zone, 220°C in the fourth zone, The fifth zone is 210°C, the head temperature is 210°C, and the screw speed is 200r / min;

[0053] (4) Place the AC foaming agent and LDPE in a high-speed mixer at a mass ratio of 1:10 for 30 minutes;

[0054] (5) Extrude and granulate the ...

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Abstract

The invention provides a method for recycling retired car polyolefin plastic parts and components by virtue of chemical foaming, and relates to a method for preparing a micro-cellular foaming material by recycling the retired car polyolefin plastic parts and components by virtue of chemical foaming. According to the method provided by the invention, an injection molding micro-cellular foaming technique is applied to the field of car plastic recycling, the defects of the prior art can be overcome, the difficult problem of recycling scraped car plastic can be solved, the resource recycling of car polyolefin plastic can be achieved, and the environmental pollution can be reduced; an obtained product is low in energy consumption and high in additional value; and the method has wide application prospects.

Description

technical field [0001] The invention relates to a method for recovering and reusing microporous foaming materials obtained from decommissioned automobile polyolefin plastic parts through chemical foaming. technical background [0002] Polyolefin materials have the advantages of low cost, corrosion resistance, and easy molding. They are widely used in automobile plastic parts such as bumpers, instrument panels, and fuel tanks. They have become the most widely used plastics in automobiles. At present, the use of polyolefin plastics in automobiles in various countries is growing rapidly. The proportion of polyolefin plastics used in passenger cars in Japan has reached 70%. . With the advancement of technology, the performance of modified polyolefin materials has been continuously improved, and can be used to replace various materials such as PVC and ABS. It is expected to realize the unification of polyolefin materials in automotive plastics. Therefore, it is of great signifi...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/06C08L51/06C08K13/02C08K3/26C08K5/10C08K5/134C08K5/526C08K3/34C08J9/10B29B9/06B29C45/76
CPCC08K3/26B29B9/06B29C45/76B29C48/92B29C2945/76498B29C2945/76531B29C2945/76561B29C2945/76595B29C2948/9258B29C2948/92704C08J9/103C08J2203/04C08J2323/06C08J2323/12C08J2423/06C08K3/34C08K3/346C08K5/10C08K5/134C08K5/526C08K5/5425C08K5/544C08K2003/265C08L23/06C08L23/12C08L2205/025C08L2205/08C08L2207/062C08L2207/066C08L2207/20C08L51/06
Inventor 郭巍华林李诚秦训鹏宋燕利
Owner WUHAN UNIV OF TECH
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