Transfer molding is different from compression molding in that the mold is enclosed [ Hayward ] rather than open to the fill plunger resulting in higher dimensional tolerances and less environmental impact.
22.
Materials that are typically manufactured through compression molding include : Polyester fiberglass resin systems ( SMC / BMC ), Torlon, Vespel, Poly ( p-phenylene sulfide ) ( PPS ), and many grades of PEEK.
23.
The glass transition temperature of these polymers can exceed 200�C . COC resins are commonly supplied in pellet form and are suited to standard polymer processing techniques such as single and twin screw extrusion, injection molding, injection blow molding and stretch blow molding ( ISBM ), compression molding, extrusion coating, biaxial orientation, thermoforming and many others.
