Recently, the first polyphenylene Sulfide short fiber production line of Sinopec was successfully launched in Tianjin Petrochemical. Polyphenylene sulfide (abbreviated as PPS) is second only to polytetrafluoroethylene, which is known as the “king of plastics†in terms of chemical stability. It is a good chemical-resistant material. Once it is available, it has caused industrial fields, especially high-temperature filtration. Field concerns. Humic Acid Granular,Leonardite Source Humic Acid ,Humic Acid Leonardite Source Humate Co., Ltd. , http://www.nsfertilizer.com