A kind of release material with hole and preparation method thereof

Abstract

The invention belongs to the technical field of plastic films and particularly relates to a perforated demoulding material and a preparation method thereof. The perforated demoulding material comprises the following raw materials in parts by weight: polyethylene glycol terephthalate, PVC paste resin, polyvinyl chloride, epoxy resin, polypropylene resin, fumed silica, polypropylene cellulose, pulullan, cedar wood oil, 2-(2'-hydroxy-5'-meth-phenyl)benztriazole, a plasticizer, a light stabilizer and a silane coupling agent. By adoption of the perforated demoulding material, static electricity is not generated in the production process of a film, so that the security of the production process is guaranteed, and the film does not adsorb dust; good wear resistance, low breakage probability and long service life are achieved; the film is easy to degrade and short in degradation period, and protects the natural environment; as a plurality of holes are formed in the film, on the basis of guaranteeing the material demoulding performance and the gird tensile strength, the impregnation performance in the vertical direction is enhanced; and when a main insulating layer with the same insulating thickness is impregnated, not only is the impregnation time greatly shortened, but also the impregnation quality is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of plastic films, in particular to a release material with holes and a preparation method thereof. Background technique [0002] At present, in order to avoid sticking with the mold when the main insulation of the stator coil of the non-integrated motor is cured, so that the coil cannot be separated from the mold, causing damage to the coil and the mold, a layer of release cloth is often wrapped around the main insulation of the coil. It is polytetrafluoroethylene, because of its low strength, it is easy to break. In addition, the traditional mold release cloth is more suitable for the multi-glue molded structure, and can play a better demoulding effect. During the process of varnishing, the resin can only enter along the direction of the main insulation layer, and basically no resin enters in the vertical direction, which results in long impregnation time, poor effect of impregnating paint, and often imperm...

AI Technical Summary

Problems solved by technology

[0002] At present, in order to avoid sticking with the mold when the main insulation of the stator coil of the non-integrated motor is cured, so that the coil cannot be separated from the mold, causing damage to the coil and the mold, a layer of release cloth is often wrapped around the main insulation of the coil. It is polytetrafluoroethylene, because of its low strength, it is easy to break. In addition, the traditional mold release cloth is more suitable for the multi-glue molded structure, and can play a better demoulding effect. During the process of painting, the resin can only enter along the direction of the main insulation layer, and basically no resin enters in the vertical direction, which results in a long impregnation time, poor effect of impregnating paint, and often impermeability of the main insulation, especially for coils with a large thickness of the main insulation.

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