High-temperature resistant isolating membrane and preparation method thereof

A technology of isolation film and high temperature resistance, which is applied in the field of compression molding of rubber-grade composite materials, which can solve the problems of high thermal shrinkage rate and high temperature resistance, and achieve the effects of good flexibility, good physical entanglement and high overall strength

Active Publication Date: 2015-12-02
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mainly aiming at the current problems of high temperature resistance, high thermal shrinkage rate and one-time use of thin film plastic separators, it provides a high temperature resistant, low shrinkage to no shrinkage, and reusable separator, which provides a high-quality solution for the polymer processing industry. An efficient, high-quality auxiliary product that can be recycled to save resources

Method used

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  • High-temperature resistant isolating membrane and preparation method thereof
  • High-temperature resistant isolating membrane and preparation method thereof
  • High-temperature resistant isolating membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] A high-temperature-resistant isolation film includes a substrate and silicone rubber isolation coatings coated on both sides of the substrate. Product structure such as figure 1 shown. The base material adopts spunlace nonwoven fabric, and the spunlace nonwoven fabric is made of PET, aromatic polyamide, carbon fiber, polyimide, polyphenylene sulfide, polyparaphenylene benzobisoxazole nonwoven fabric A sort of. PET is preferred.

[0061] The main function of the spunlaced nonwoven fabric is to act as a reinforcement of silicone rubber, and at the same time make the silicone rubber penetrate and rivet the fiber web for reinforcement, improve the bonding strength of the silicone rubber and the fiber web, and improve the physical and mechanical properties and service life of the silicone rubber. . The thickness of spunlace reinforced nonwoven fabric is 0.05-2mm, the fiber used has high temperature resistance and thermal stability, and the fiber length is generally 5-30m...

Embodiment 2

[0074] Preparation of embodiment 2 functional silicone rubber (raw material adopts solid silicone rubber)

[0075] The solid silicone rubber is mixed on an open mill to prepare the silicone rubber with required functions.

[0076] Adjust the front and rear roll speed ratio (1.1-1.3) of the mill: 1, control the roll temperature to no more than 50°C, and mix for about 30 minutes. First adjust the roller spacing to about 1.0mm, add 10kg of solid silicone rubber to cover the rollers; then gradually increase the roller spacing by 1-5mm, and add 4kg of precipitated silica, 4kg of fumed silica, and two 0.5kg of phenylsilanediol, 0.5kg of (hydroxyl) silicone oil, 0.06kg of iron oxide, and finally add 0.05kg of dicumyl peroxide, reduce the roller distance to about 1.0mm, and thin pass 5-10 times. After the next film is parked for 24 hours, it is ready to use.

Embodiment 3

[0077] The preparation of embodiment 3 functional silicone rubber (raw material adopts A, B two-component liquid silicone rubber)

[0078] The two-component liquid silicone rubber is mixed in a high-speed mixer to prepare the silicone rubber with the desired function.

[0079] In a high-speed mixer, add 30kg of liquid silicone rubber component A, 3kg of component B, 5kg of diphenylsilanediol, and stir at high speed for 5 minutes, then add 10kg of fumed white carbon black, 0.06kg of iron oxide, and continue stirring for 10 minutes. Transport to a three-roll mill for grinding for 20 minutes and set aside.

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Abstract

The invention discloses a high-temperature resistant isolating membrane and a preparation method thereof. The isolating membrane comprises a base material and silicone rubber isolating coatings coated on two sides of the base material, wherein the base material is spunlace non-woven cloth. The preparation method comprises the following steps: (1) preparation of functional silicone rubber; (2) preparation of a mixture of solvent-type silicone rubber emulsions; (3) heat treatment of the spunlace non-woven cloth, coating finishing, curing and cross linking. The high-temperature resistant isolating membrane has the advantages that (1) the isolating membrane is resistant to high temperature; (2) the isolating membrane is resistant to thermal shrinkage; (3) the isolating membrane can be recycled. As the isolating coatings are mainly made of liquid or solid silicone rubber, and is high in wettability and physical entanglement property to fiber of the non-woven cloth, the isolating membrane is integral after curing under the action of a cross-linking agent, is prevented from peeling off and layering, is relatively high in overall strength, excellent in flexibility, and is still resistant to aging and damage after being recycled.

Description

technical field [0001] The invention relates to the field of compression molding processing of rubber-grade composite materials, in particular to a high-temperature-resistant isolation film and a preparation method thereof. The high-temperature-resistant isolation film can be used for high-temperature processing and demoulding in the field of molding and processing of rubber composite materials, thermosetting resin composite materials and other polymer composite materials. Background technique [0002] After high-temperature molding of high-molecular products based on polymers, it is necessary to quickly and smoothly separate the product from the mold to ensure product quality and improve manufacturing efficiency. For this reason, a material needs to be added between the product and the processing mold to improve the release effect. Both the release agent and the release film (release paper, silicone oil paper) can play this role, but the spray uniformity of the release age...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/643D06M11/79B29C41/30B29B7/56D06M101/32
Inventor 谢艳霞黄勇黄承辉张宇韦峻峰徐萍
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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