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Processing method for resin/filler composite material

A composite material and processing method technology, applied in the field of chemical product processing, can solve problems such as low industrial productivity, difficulty in large-scale application, cumbersome steps, etc., to save surface treatment process, improve industrial productivity, and facilitate dispersion effect of effect

Inactive Publication Date: 2012-01-18
上海树普新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method of improving the dispersion of fillers through surface modification is cumbersome, the industrial productivity is not strong, the cost is high, and it is difficult to achieve large-scale application in production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Raw material: matrix resin is polyphenylene sulfide, filler is graphite.

[0013] The processing method is as follows:

[0014] Take 50 kilograms of polyphenylene sulfide and 5 kilograms of graphite together in a twin-screw extruder (maximum speed of 600 rpm) for blending and extruding to granulate. The blending temperature is 265 ° C, which is lower than the melting point of polyphenylene sulfide (288 ℃) 23 ℃, but higher than the glass transition temperature of polyphenylene sulfide (90 ℃). During blending extrusion granulation, the screw speed of the twin-screw extruder is controlled to be set at 50% lower than the maximum speed, that is, a speed of 240 rpm is used. This method achieves a stable and good dispersion of carbon black in the matrix.

Embodiment 2

[0016] Raw materials: The matrix resin is polyphenylene sulfide, the other resin is nylon 6, and the filler is carbon black.

[0017] The processing method is as follows:

[0018] Take 50 kg of polyphenylene sulfide and 5 kg of carbon black together in a twin-screw extruder to extrude and granulate. The blending temperature is 265°C, which is 23°C lower than the melting point of polyphenylene sulfide (288°C). , but higher than the glass transition temperature of polyphenylene sulfide (90°C). During blending extrusion granulation, the screw speed of the twin-screw extruder is controlled to be set at 50% lower than the maximum speed of 600 rpm, that is, a speed of 250 rpm is used. Form primary granules; then carry out secondary blending extrusion granulation with above-mentioned primary granules after drying and dry nylon 6 altogether 15 kilograms, extrusion temperature and rotating speed conditions are the same as the first step, form secondary granules, i.e. A resin / filler c...

Embodiment 3

[0021] Raw materials: The matrix resin is polyphenylene sulfide and nylon 66, and the filler is carbon black and nano-silica.

[0022] The processing method is as follows:

[0023] Get 50 kilograms of polyphenylene sulfide, 5 kilograms of carbon black and 5 kilograms of nano-silica, co-extrude and granulate together in a twin-screw extruder (maximum rotating speed 600rpm), and the blending temperature adopts a temperature lower than that of polyphenylene sulfide. Blending was performed at a temperature higher than the melting point (288°C) but higher than the glass transition temperature (90°C) of polyphenylene sulfide, that is, 265°C. During blending extrusion granulation, the screw speed of the twin-screw extruder is controlled to be set at 50% lower than the maximum speed, that is, a speed of 240 rpm is adopted. The product obtained in this step is a primary particle. After drying, the primary particles are the same as 30 kg of nylon 66, the same speed is set at 240rpm, a...

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Abstract

The invention discloses a processing method for a resin / filler composite material. The blending extrusion granulation is carried out by adopting a double-screw extruder, wherein the temperature of the blending extrusion granulation is controlled in a range which is higher than the glass state temperature or the softening point temperature of a resin, but is 10-40 DEG C lower than the melting point temperature of the resin, and the rotation speed of screws of the double-screw extruder is controlled to be equal to or lower than 50% of the maximal rotation speed of the screws. According to the processing method, through the regulation and the control of the extrusion temperature of double screws, the viscosity difference of a filler and a resin matrix and the free volume of the resin matrix are decreased; the best effect of dispersing the filler is achieved; through decreasing the rotation speed of the screws, the residence time of a matrix resin and the filler in the double-screw extruder is improved, so that the blending time is prolonged; and by being matched with a two-step method, a better dispersion effect of the filler is achieved. According to the processing method, the favorable dispersion effect of the filler is achieved by adopting a non-chemical method, namely a special physical processing method, and the industrial productbility of a filling type composite material is improved.

Description

technical field [0001] The invention relates to a processing method of chemical products, in particular to a processing method of resin / filler composite material. Background technique [0002] In the prior art, for materials mainly prepared by polymer resins and fillers, improving the dispersion of fillers can greatly modify the physical properties or electrical or thermal conductivity of composite materials, and improve the stability of product quality. The method used is usually a chemical method of surface modification of the filler. For example, the two patents with patent numbers ZL02805500.4 and ZL 200310114392.6 both use the method of grafting or coating organic compounds on the surface of the filler to enhance the compatibility of the filler with the matrix resin. Thereby improving the dispersion of the filler in the polymer resin. This method of improving the dispersion of fillers through surface modification is cumbersome, has low industrial productivity and high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B9/00B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885
Inventor 周玄全殷炳虎任锋杰赵宏生陈洁
Owner 上海树普新材料科技有限公司
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