... good acid, alkali, salt and other 80 kinds of acid and alkali chemical corrosion resistance performance,and also ... density polyethylene as raw material, plus carbon black, stabilizers, UV absorbers made of impermeable material co-extrusion. Corrosion resistance, aging ... tear strength, N≥210≥2497Punctured strength, N≥550≥7008Carbon black content, %≥2.0≥2.09Environmental stress cracking resistance F20 ...