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A recycling process of polyimide film waste

A polyimide film and polyimide technology, which is applied in the field of polyimide film waste recycling process, can solve the problems of long processing cycle, multi-stage process, environmental pollution, etc., and achieve short processing cycle and crushing Short time and low energy consumption

Active Publication Date: 2021-10-22
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of recycling process has problems such as long processing cycle, multi-stage process, high energy consumption, complex process, large amount of lye and acid, high cost and environmental pollution.

Method used

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  • A recycling process of polyimide film waste
  • A recycling process of polyimide film waste
  • A recycling process of polyimide film waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of recovery process of polyimide film waste, it comprises the steps:

[0029] 1) Weigh 10 parts of polyimide film waste powder and 90 parts of phenolic resin respectively, and dry them at 80°C for 4 hours;

[0030] 2) Then ball mill at a high speed for 30 minutes in a high-energy planetary ball mill at a speed of 400r / min, mix evenly and improve the interface between the two phases; put the material obtained by ball milling into the cavity of the forming mold, then put it into a plate press, and heat it to 120°C for preheating 0.5h, then continue to heat up to 150°C for 0.5h, and start to apply pressure, control the pressure to 10MPa; continue to heat up to 180°C for 2h, and then maintain the temperature and pressure at 200°C for 1h; cool down to 140°C before unloading Press, open the mold and take out the test piece to obtain the polyimide / phenolic resin composite material.

Embodiment 2

[0032] A kind of recovery process of polyimide film waste, it comprises the steps:

[0033] 1) Weigh 15 parts of polyimide film waste powder and 85 parts of phenolic resin respectively, and dry them at 80°C for 4 hours;

[0034] 2) Then ball mill at a high speed for 30 minutes in a high-energy planetary ball mill at a speed of 400r / min; put the material obtained from the ball mill into the cavity of a forming mold, then put it into a flat press, heat it to 120°C for 0.5h, and then raise the temperature to 150°C for heat preservation 0.5h, and start to apply pressure, control the pressure at 10MPa; continue to heat up to 180°C for 2h, and then maintain the temperature and pressure at 200°C for 1h; wait until the temperature is cooled to 140°C to release the pressure, open the mold and take out the test piece; that is Polyimide / phenolic resin composite.

Embodiment 3

[0036] A kind of recovery process of polyimide film waste, it comprises the steps:

[0037] 1) Weigh 10 parts of polyimide film waste powder, 85 parts of phenolic resin and 5 parts of amino-terminated polysiloxane, and dry them at 80°C for 4 hours;

[0038] 2) Then ball mill at a high speed for 30 minutes in a high-energy planetary ball mill at a speed of 400r / min; put the material obtained from the ball mill into the cavity of a forming mold, then put it into a plate press, heat it to 120°C for 0.5h, and then continue to heat up to 150°C Keep warm for 0.5h, and start to apply pressure, and control the pressure to 10MPa; continue to heat up to 180°C for 2h, and then maintain the temperature and pressure at 200°C for 1h; wait until the temperature drops to 140°C to release the pressure, open the mold and take out the test piece; that is A polyimide / phenolic resin composite was obtained.

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Abstract

The invention relates to a method for recycling polyimide film waste, which comprises drying, mechanically blending and pressing polyimide waste pulverized material, polymer base material and compatibilizer to obtain polyimide film waste. The imine modified composite material realizes the recycling of polyimide film waste. The present invention proposes to compound polyimide waste crushed material and polymer base material for the first time, and adopts a simple blending method to prepare polyimide modified composite material. The obtained composite material has good interfacial bonding force and can exhibit excellent It has excellent mechanical properties and heat resistance, and has potential application prospects in the fields of high-performance polymer heat-resistant composite materials and friction materials; and the molding process involved is simple, low-cost, and environmentally friendly, which can be used for the recycling of polyimide film waste. Recycling provides a new way of thinking.

Description

technical field [0001] The invention belongs to the technical field of solid waste recycling, and in particular relates to a polyimide film waste recycling process. Background technique [0002] Polyimide (PI) is one of the polymer materials with the best comprehensive performance. Its film products have high strength, wear resistance, high temperature resistance and other properties, which can meet the design requirements of various products. In recent years, it has been widely used in aviation , aerospace, LED, electronic communication and optoelectronic display and other fields. With the vigorous development of these industries, the demand for polyimide film is increasing day by day, but it also causes a large amount of waste of resources such as polyimide film waste and leftovers; and the disposal of incineration and landfill polyimide film waste The method is not friendly to the environment and is not in line with sustainable development. Therefore, the recycling of p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L61/06C08L79/08C08L83/08C08L27/18C08L51/06
CPCC08L27/18C08L61/06C08L2201/08C08L79/08C08L83/08C08L51/06
Inventor 王雁冰陈庸杰秦岩黄志雄
Owner WUHAN UNIV OF TECH
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