Injection molding

Equipment:

Standard equipment is used for processing of thermoplastic elastomers of PlastComposite Materials by injection molding method - plastics processing machines with universal screw for processing of poliolefines (L/D = 20, compression degree 2,5:1 - 3,5:1). 

Injection pressure:

Thermoplastic elastomers of PlastComposite Materials can be processed in the wide range of pressure. To provide the quick filling of mold it is recommended to keep pressure at about 100 MPa.

Speed of screw rotation and value of return pressure:

Speed of screw rotation is recommended to be 25-75 rpm. Return pressure (material back pressure) should be at the minimum (lower than 0.5 MPa). 

In case of self dying of material w ith masterbatch the value of return pressure should be increased to provide more qualitative mixing.

Material drying:

TPE-S materials on base of SEBS/SBS don't require preliminary drying (at normal storage conditions). In case the material absorbed some moisture (during transportation, package was not tight, temperature drop etc) the material should be dried during 2 hours at 80-90°C.

TPV and TPO materials require preliminary drying during two hours at 80-90°C.

Barrel cleaning:

Thermoplastic elastomers of PlastComposite Materials are heat stable. In case of machine shut dow n cleaning of material barrel is not required. For cleaning purpose (if necessary) it is recommended to use pure polypropylene (PP) or polyethylene (PE).

Secondary material processing:

Thermoplastic elastomers of PlastComposite Materials are 100% secondary processed. It possible to add up to 20% of secondary material of total mass of primary thermoplastic. When material having hardness less than 80 Shore A is crushed increased cooling or sharp blades should be required.

Processing modes: