It is difficult to control the ash content of polypropylene. my country’s ultra-low ash polypropylene relies heavily on imports.

ultra-low ash polypropylene is a high-end polypropylene product, which refers to polypropylene products with an ash content within 0.005. the ash content of polypropylene refers to the content of the remaining substances in the polypropylene sample that cannot volatilize after burning at high temperature (850±50)°c. excessive ash content will seriously affect the quality of polypropylene…