2016年4月5日星期二

The related properties of PVC fittings

PVC fittings is a PVC resin as the main raw material, to join the special auxiliary, through the extruder extrusion molding.
The pressure resistance performance of PVC pipe fittings is the main mechanical index, which is not only the mechanical and equipment factors, but also the raw materials and formulation factors. Such as extrusion screw and barrel clearance shoulds not be too big; feeding amount greater and greater compression ratio; design reasonable formula and corresponding reasonable process adjustment, plasticizing rate control in 60% - 70%.
Although PVC fittings, rigidity, cold crushing performance excellent, 20 DEG C pressure ring stress may be greater than 36Mpa, is currently appearing on the market building plastic water supply pipe in the amount of the largest, but the high temperature and pressure of very poor, it can only be used for 45 DEG C cold water or cold hot water pipeline system.