天天操夜夜操狠狠操婷婷,福利91精品一区二区三区,手机永久免费AV在线播放,绯色一区二区三区免费看,日美女高潮兴奋在线视频

Polypropylene industrial yarn is a kind of fiber, but it is not a natural fiber. It is a natural yarn that uses polypropylene as a raw material and spontaneously undergoes chemical reaction through mechanical action and finally weaves the yarn successfully.

Under the interaction of polypropylene industrial yarn manufacturer and sunshine, the photosynthetic stability of polypropylene original polypropylene molecule can be improved correspondingly. The molecular weight of the tensile strength with the aging time of the law is basically the same, which can prove that polypropylene industrial yarn for the aging of the sun's ultraviolet rays, will result in the reduction of the intrinsic molecular content.

Now companies generally use solution spinning and wet spinning spinning polypropylene industrial yarn. The former is through the selection of a suitable solvent, the high polymerization material dissolved into a spinning solution, or polypropylene soluble intermediates, dissolved into a spinning solution, the final spinning work. Solution spinning in accordance with the different coagulation conditions are divided into wet spinning and dry spinning. The principle of wet spinning is to dissolve the polypropylene raw materials in a solvent to make a spinning solution, and then spray the spinning solution from the spinneret into the coagulation bath. Due to the diffusion and permeation of the solvent, the filaments coagulate Silk. Dry spinning is a chemical fiber spinning method that dissolves a fiber-forming polymer in a volatile solvent, ejects a trickle through a spinneret orifices, and forms fibers in hot air.

Xuzhou Heping Chemical Fiber Co., Ltd. specializes in the production and sales of polypropylene industrial yarn, Split industrial yarn, PP split yarn, High-strength pp network yarn, Twisted high-strength PP yarn, High-strength polypropylene yarn, PP industrial yarn, Colored PP network yarn, High-strength pp Industrial yarn.