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Methods for recovery treatment reutilization of prepreg offcuts

A technology of prepreg and trimmings, applied in recycling technology, applications, household components, etc., can solve the problems of a large number of trimmings, environmental pollution and equipment loss, and achieve the effect of reducing costs and controlling environmental pollution

Active Publication Date: 2014-05-07
SHANGHAI GUOJI ELECTRONICS MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects of a large amount of trimmings, environmental pollution, and large equipment loss in the existing process of preparing prepregs, and to provide a method for recycling and reusing prepreg trimmings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Step 1: Cryogenic treatment

[0026] Put the trimmings of the prepreg into an airtight container, pass through liquid nitrogen, the mass ratio of liquid nitrogen to the trimmings is 1:1.5, and control the temperature of the liquid nitrogen at -170°C (±5°C). If the temperature rises Continue to feed liquid nitrogen, and the treatment time is 5 minutes to 10 minutes.

[0027] Step 2: Shred

[0028] The trimmed material processed in the above steps is quickly transferred to the crushing equipment, the crushed particle size is 0.1mm ~ 10mm, brushed through a 50-mesh screen, and then the impurities in the crushed material are removed by magnetic separation equipment to obtain the material.

[0029] Step 3: Mix and beat

[0030] The material obtained above is added to recycled industrial waste paper pulp, and the mass ratio of material to industrial waste paper pulp is 1:30. After mixing evenly, it is sent to the beater, and the pulp is beaten to a degree of beating of 40°...

Embodiment 2

[0033] Step 1: Cryogenic treatment

[0034] Put the trimmings of the prepreg into an airtight container, pass through liquid nitrogen, the mass ratio of liquid nitrogen to the trimmings is 1:1.5, control the temperature of the liquid nitrogen at -150°C (±5°C), if the temperature rises Continue to feed liquid nitrogen, and the processing time is 3 minutes to 5 minutes.

[0035] Step 2: Shred

[0036] The trimmings processed in the above steps are quickly transferred to the crushing equipment, and the crushed particle size is 0.1 mm to 10.0 mm. The metal impurities in the crushed materials are removed by a magnetic separation device to obtain materials.

[0037] Step 3: Mix and press

[0038] Mix the material obtained above with wood chips of the same particle size ratio in proportion to the mass, and then add a thermosetting adhesive. The mass ratio of material: wood chips: adhesive is 1:2:0.2. In the mold, it is sent to the pressing equipment for heating and pressing, the p...

Embodiment 3

[0041] Step 1: Cryogenic treatment

[0042] Put the trimmings of the prepreg into an airtight container, pass through liquid nitrogen, the mass ratio of liquid nitrogen to the trimmings is 1:2.0, and control the processing temperature at -175°C (±5°C). Liquid nitrogen was introduced to ensure the treatment temperature, and the treatment time was 3min to 5min.

[0043] Step 2: Shred

[0044] The trimmings processed in the above steps are quickly transferred to the crushing equipment, the crushed particle size is 0.01mm-0.1mm, screened with a 200-mesh screen, and the metal impurities in the crushed material are removed through a magnetic separation device to obtain the material.

[0045] Step 3: Filling and pressing

[0046] Thoroughly mix the above materials with fillers (silicon dioxide, aluminum hydroxide and barium sulfate) with the same particle size ratio, the mass ratio of the materials to the total amount of fillers is 1:20, add to the glue used In the adhesive, the l...

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PUM

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Abstract

The present invention discloses a recovery treatment method for prepreg offcuts, wherein the method comprises: carrying out a deep cooling treatment and crushing on prepreg offcuts. The present invention further discloses a reutilization method for prepreg offcuts, wherein the method comprises: carrying out reproducing on the raw material containing the treated prepreg offcuts according to the requirement. With the methods of the present invention, the environmental pollution is effectively controlled, the waste industrial scrap is recycled, the cost of the production enterprise is saved, the industrial chain cross can be formed with other industries, and the development of downstream industries can be prompted well.

Description

technical field [0001] The invention relates to a method for recycling and reusing trimmings of prepregs. Background technique [0002] With the rapid development of science and technology, the scale of industrial production in the electronics industry continues to expand. Especially in recent years, with the rapid development of the epoxy resin industry and the increasing market demand, it has driven the diversification of its downstream industries. The laminate industry has a new peak period of development, and many laminate manufacturers continue to expand production. Increase production capacity. [0003] At present, the production process of domestic laminates mainly includes: the preparation of adhesives, the preparation of prepregs, the preparation of laminates, and pressing. Among them, in the preparation process of the prepreg, after the edge of the common glass fiber cloth impregnated material passes through the process, the end of the weft yarn is soaked and bak...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C23/06B02C23/08H01B13/14H01B13/24D21B1/32D21C5/02B27N3/08
CPCY02W30/64
Inventor 胡瑞平常立荣
Owner SHANGHAI GUOJI ELECTRONICS MATERIALS CO LTD
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