Adhesive high temperature-resistant demoulding cloth and preparation method thereof

A technology with high temperature resistance and self-adhesiveness, applied in chemical instruments and methods, adhesives, non-polymer adhesive additives, etc., can solve problems such as reduced coating adhesion, mold damage, and harsh production conditions

Active Publication Date: 2016-06-15
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Taking the molding of wind turbine blades as an example, the wind blades are made of epoxy resin fiberglass composite material (glass fiber reinforced plastics). The existing process requires pre-spraying a large amount of release agent on the blade mold to ensure that the epoxy resin can be released from the mold after curing. ; After the blades are removed from the mold, manual sanding is required, and the paint can only be sprayed after the release agent is physically eliminated, otherwise the adhesion of the paint will be reduced and the quality of the film will be affected.
The workshop is dusty and the production conditions are harsh. The flying dust not only damages the respiratory system of the operators, but also brings hidden dangers to fire safety.
[0004] Chinese patent CN102442026A uses polytetrafluoroethylene dispersion to impregnate glass fiber cloth, and prepares release cloth by high temperature treatment at 360-400°C. Because the warp and weft of glass fiber cloth are interlaced, there are congenital defects of "pinholes" at the interweaving point, and the molding process The resin in the medium will permeate along the "pinholes", pass through the release cloth, and enter the mold, causing mold release failure and mold damage; glass fibers will be pulled out at the "pinholes", resulting in a decline in product quality. In addition, ordinary release cloth It must be cooled to room temperature before demoulding

Method used

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  • Adhesive high temperature-resistant demoulding cloth and preparation method thereof
  • Adhesive high temperature-resistant demoulding cloth and preparation method thereof

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preparation example Construction

[0029] According to the present invention, the preparation method of the silicone pressure-sensitive adhesive includes the following steps: adding organic solvent, MQ silicone resin and silicone rubber in parts by mass to the reaction kettle, and slowly dripping Add the catalyst, drop it in 1-3 hours, then add the cross-linking agent and meteorological silica, continue the reaction at 130-150°C for 2 hours, and obtain the silicone pressure-sensitive adhesive after cooling.

[0030] Add the curing agent dibenzoyl peroxide to the silicone pressure-sensitive adhesive prepared above at a mass ratio of 1 wt%, and stir evenly to prepare a silicone pressure-sensitive collagen solution.

[0031] The present invention also provides a preparation method of self-adhesive high temperature resistant release cloth, comprising:

[0032] Step 1: hot-compressing polytetrafluoroethylene film and glass fiber cloth round rollers to obtain a glass fiber-reinforced anti-adhesive layer; the temperat...

Embodiment 1

[0036] Add 50 kg of xylene, 5 kg of toluene, 60 kg of MQ silicone resin and 50 kg of silicone rubber into the reaction kettle, and slowly add 5 kg of dibutyltin dilaurate dropwise after the temperature rises to 135 °C. Add 1 kg of phenyltributylketoxime silane to 15 kg of white carbon black, then continue to react at 140°C for 2 hours, and obtain a silicone pressure-sensitive adhesive after cooling, which is ready for use. When using, add curing agent dibenzoyl peroxide at a mass ratio of 1 wt%, stir evenly, and prepare silicone pressure-sensitive collagen solution.

Embodiment 2

[0038] Add 55 kg of xylene, 10 kg of toluene, 70 kg of MQ silicone resin and 55 kg of silicone rubber into the reaction kettle, slowly add 6 kg of dibutyltin dilaurate dropwise after the temperature rises to 135 °C, and the dropwise addition is completed in 1 hour. Add 1 kg of methyl tributyl ketoxime silane to 18 kg of white carbon black, then continue to react at 140°C for 2 hours, and obtain a silicone pressure-sensitive adhesive after cooling, which is ready for use. When using, add curing agent dibenzoyl peroxide at a mass ratio of 1 wt%, stir evenly, and prepare silicone pressure-sensitive collagen solution.

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Abstract

The invention provides an adhesive high temperature-resistant demoulding cloth and a preparation method thereof, which belong to the technical field of the demoulding cloth. The demoulding cloth comprises an antistick layer, a bearing fabric layer and a bonding layer from up to down, the antistick layer is a teflon film, the bearing fabric layer is glass fiber cloth, and the bonding layer is an organosilicon pressure-sensitive adhesive. The invention also provides the preparation method of the adhesive high temperature-resistant demoulding cloth, the method is characterized in that the teflon film and a glass fiber cloth round roller are subjected to hot pressing for compositing to prepare the glass fiber-enhanced antistick layer; then the glass fiber surface is coated with a stock solution of the organosilicon pressure-sensitive adhesive, and then is slaked at the high temperature to obtain the adhesive high temperature-resistant demoulding cloth. According to the invention, the surface of the demoulding cloth is integral without pin holes, the demoulding can be carried out at the high temperature of 80 DEG C, a production period is shortened, and efficiency is increased.

Description

technical field [0001] The invention belongs to the technical field of film cloth, and in particular relates to a self-adhesive high-temperature-resistant release cloth and a preparation method thereof. Background technique [0002] The technology of compression molding of FRP products is to put thermosetting resin in a mold at a specified temperature and pressurize it so that the material melts and flows and fills the mold cavity evenly. Processing to obtain desired products. [0003] Taking the molding of wind turbine blades as an example, the wind blades are made of epoxy resin fiberglass composite material (glass fiber reinforced plastics). The existing process requires pre-spraying a large amount of release agent on the blade mold to ensure that the epoxy resin can be released from the mold after curing. ; After the blade is demoulded, it needs to be sanded manually, and the paint can only be sprayed after the release agent is physically eliminated, otherwise the adhes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B17/10B32B17/02B32B37/10C09J183/04C09J11/04
CPCB32B27/12B32B37/10B32B2262/101B32B2307/306B32B2327/18C09J11/04C09J183/04C08L83/04C08K13/02C08K3/36
Inventor 刘向东杨宇明盛德鲲熊征蓉王军孙磊郭晓明
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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