PVC blow molding and rolling film difference
Calender: is the thermoplastic plastic melt through more than two parallel counter rotating roller gap, make the solution by the roller extrusion extension, stretching into a certain size and with continuous sheet product quality requirements, the method of natural cooling molding.
Blow mold shape: can do more, can be hollowCalender: often used in the manufacture of plastic films or sheetsThe essence of the two lies not in the source of the molding force
Blow molding: a method of forming a hollow product by expanding a hot melt parison closed in a mold by means of a gas pressure,
