... save and environmental protection, easy to use P55 Biogas Reactorthe soft PVC biogas digester, blue second-generation product that uses a ... or cracksTensile strength, elongation at break and tear strength loss ≤10%Heating tolerance (80±2) , 20hFree of warp, cracks and ... 3) , 180°, foldedFree of fold and ripOil resistance, 5h, 60, 10# machine oilDo not crack.Air permeability, cm3/m2dPa ≤