久久激情5月丁香伊人_αv中文字幕女人乱码在线_成年人看的毛片在线观看_国产上床视频_精品亚洲国产黄片_三级日本黄页网站大全_国产美女精品网站_在线观看中文综合亚洲_男操女视频免费_亚洲中文字幕无码永久

What are the purposes of adding heat stabilizers to Jiangmen engineering plastics

2019-12-02 1199

Introduction to the intention of engineering plastics to participate in heat stabilizers and the primary use object of heat stabilizers: heat stabilizers belong to one of the stabilizers, which is an additive that can make the quality of plastics not deteriorate under high temperature environment. Because the thermal stability of PVC is very poor, while other plastics have good thermal stability within the temperature range of molding processing. Therefore, the primary use object of heat stabilizer is PVC.

江門工程塑料

Introduction to the intention of engineering plastics to participate in the heat stabilizer: it is well known that the molding of plastic products is obtained through thermal processing. When resins and other materials are heated, softened, melted and molded, they must undergo high-temperature testing. For example, PVC resin, because the processing temperature is very close to its decomposition temperature, when it is processed at 160 ~ 200 ℃, PVC will undergo severe thermal degradation, macromolecular chain fracture, product discoloration and function degradation. In order to stop this phenomenon, it is necessary to participate in the heat stabilizer, otherwise, this product cannot be used.

Source: Jiangmen engineering plastics http://xrtsm.com.cn/