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Recovery utilization method of continuous fiber-reinforced thermoplastic composite waste material

A technology of reinforced thermoplastic and continuous fiber, applied in the field of composite materials, can solve the problems of fiber damage and performance degradation, and achieve the effect of simple equipment, low price and high efficiency

Inactive Publication Date: 2014-05-14
LIAONING LIAOJIE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional plastic recycling method breaks the composite material, turns the long fiber into short fiber and re-granulates it, which greatly destroys the fiber, and the performance after re-granulation drops a lot

Method used

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  • Recovery utilization method of continuous fiber-reinforced thermoplastic composite waste material
  • Recovery utilization method of continuous fiber-reinforced thermoplastic composite waste material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1 Recycling of continuous fiber reinforced polypropylene waste

[0041] (1) Cut the continuous fiber reinforced polypropylene material waste to a size of 150×150mm; then put it into an aqueous solution with a concentration of 5wt% caustic soda detergent at 80°C for washing; dry it at 120°C for 10 minutes; then crush it to obtain Crushed material with a fiber length of 30-50mm;

[0042] (2) The continuous glass fiber reinforced polypropylene prepreg with 50 parts by weight of fiber and 50 parts by weight of resin is flattened by traction and rolling;

[0043] (3) Flatten the pulverized material with an area density of 1200g / ㎡ obtained in step (1), and evenly spread it on the continuous glass fiber reinforced polypropylene prepreg after rolling in step (2), and then place it on the pulverized material Lay a layer of continuous glass fiber reinforced polypropylene prepreg on the surface;

[0044] (4) Pull the material obtained in step (3) at 0.8m / min by a tractio...

Embodiment 2

[0044] (4) Pull the material obtained in step (3) at 0.8m / min by a traction device; turn on the infrared oven for heating, and the heating temperature is 160°C; then use metal rollers to make it smooth and cool to 50°C with cooling water Coiled or cut. Example 2 Recycling Continuous Fiber Reinforced Polypropylene Scrap

[0045] (1) Cut the continuous fiber reinforced polypropylene material waste to a size of 180×180mm; then put it into an aqueous solution with a concentration of 5wt% caustic soda detergent at 80°C for washing; dry it at 120°C for 15 minutes; then crush it to obtain Crushed material with a fiber length of 30-50mm;

[0046] (2) The carbon fiber reinforced polypropylene fiber fabric with 50 parts by weight of fiber and 50 parts by weight of resin is flattened by traction and rolling;

[0047] (3) Set the areal density obtained in step (1) to 1200g / m 2 The crushed material is flattened, evenly spread on the carbon fiber reinforced polypropylene fiber fabric rol...

Embodiment 3

[0048] (4) Pull the material obtained in step (3) at 0.8m / min by a traction device; turn on the infrared oven to heat, and the heating temperature is 170°C; then roll it with a metal roller to make it smooth, and cool it to 50°C with cooling water. Coiled or cut. Example 3 Recycling of continuous fiber reinforced polypropylene waste

[0049] (1) Cut the continuous fiber reinforced polypropylene material waste to a size of 150×150mm; then put it into an aqueous solution with a concentration of 5wt% caustic soda detergent at 80°C for washing; dry it at 120°C for 20 minutes; then crush it to obtain Crushed material with a fiber length of 30-50mm;

[0050] (2) The continuous glass fiber reinforced polypropylene prepreg with 50 parts by weight of fiber and 50 parts by weight of resin is flattened by traction and rolling;

[0051] (3) Set the areal density obtained in step (1) to 1600g / m 2 The pulverized material is flattened, evenly placed on the continuous glass fiber reinforce...

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Abstract

The invention belongs to the field of composite materials and relates to a recovery utilization method of a continuous fiber-reinforced thermoplastic composite waste material. The recovery utilization method comprises the following steps of cutting a recovered continuous fiber-reinforced thermoplastic composite material, carrying out washing and drying, carrying out crushing, rolling a fiber-reinforced resin prepreg or a fiber fabric by traction and multiple metal rollers, putting the crushed material on the rolled fiber-reinforced resin prepreg or fiber fabric, putting a prepreg or fiber fabric layer on the surface of the crushed material, by traction, heating the crushed material and the prepreg or fiber fabric and carrying out rolling flattening, and carrying out cooling reeling or cutting. The recovery utilization method utilizes simple equipment, has a low price and low technical requirements, and has low energy consumption and high efficiency. The continuous fiber-long fiber mixed product prepared from the continuous fiber products has low performances, utilizes recovered materials as most raw material and has considerable economic and environmental benefits.

Description

technical field [0001] The invention belongs to the field of composite materials, and relates to a method for recycling waste materials of continuous fiber reinforced thermoplastic composite materials. Background technique [0002] With the development of composite materials, composite materials have been widely used due to their specific strength, high specific stiffness and light density. One of the current development trends of composite materials is to replace traditional thermosetting epoxy composite materials with thermoplastic composite materials. One of the reasons is that thermoplastic composite materials can be formed by simple heating, melting and cooling, and can be welded like metal. Therefore, the development of thermoplastic composite materials will bring about great changes in the future market. The traditional plastic recycling method breaks the composite material, turns the long fiber into short fiber and re-granulates it, which greatly destroys the fiber, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34B29B17/00
CPCY02W30/62B29C70/34B29B17/00
Inventor 刘旭
Owner LIAONING LIAOJIE SCI & TECH
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