Tyvek was discovered by Jim White, a researcher at dupont, by accident.In 1955, Jim White discovered in his laboratory that a White polyethylene fluff was coming out of the tube.After inspection, it was found that this material has some very interesting properties, so I made a plan to develop a new material. One year later, I submitted a patent application for high-strength yarn polyethylene material, and after several years of development and improvement, I tried the new results on book covers, labels and specific clothing materials.The brand was registered in 1965 and was not mass-produced until 1967, when it was introduced into the medical packaging industry in 1972. The process composition of tevtron: Material ------ is HDPE fiber; Process -- flash - spinning - laying - bonding into a sheet Some features: Waterproof, breathable and resistant to bacteria, can still maintain flexibility and high strength at -73 degrees;Contraction begins at 118 degrees;It starts melting at 135 d...