Polystyrene (PS)

Specific gravity: 1.05 g / cm3

Molding shrinkage: 0.6-0.8%

Molding temperature: 170-250 ° C

Drying conditions:

Material performance:

Excellent electrical insulation (especially high-frequency insulation), colorless and transparent, light transmittance is second only to plexiglass, coloring water resistance, chemical stability, good strength, but brittle, easy to produce stress cracking, not Resistant to organic solvents such as benzene and gasoline.

Suitable for making insulating transparent parts, decorative parts and chemical instruments, optical instruments and other parts

Molding performance:

1. Amorphous material, low moisture absorption, no need to dry fully, not easy to decompose, but large thermal expansion coefficient, easy to generate internal stress. Good fluidity, can be molded by screw or plunger injection machine.

2. It is advisable to use high material temperature, high mold temperature, low injection pressure and prolonged injection time to reduce internal stress and prevent shrinkage and deformation.

3. Various forms of gates can be used, and the gates are connected with the circular arc of the plastic parts to avoid damage to the plastic parts when the gates are removed. The drafting angle is large and the ejection is uniform. The plastic parts have uniform wall thickness, preferably without inserts. The inserts should be preheated if have.

Applications:

(a) electronic appliances: connectors, switch parts, household appliances, accessories parts, small electric cover or (heat resistance, flame retardancy, electrical insulation, molding processability);

(b)car:

1. Exterior parts: mainly have corners of Geshan, engine heat release hood, etc.;

2, internal components: mainly have endoscope stays, wiper brackets and control system valves;

3, automotive electrical parts: automotive ignition coils and various electrical connectors.

(c) Mechanical equipment: belt drive shaft of video tape recorder, computer cover, mercury lamp cover, electric iron cover, baking machine parts and a large number of gears, cams, buttons, electronic watch case, camera parts (with heat resistance, Flame retardant requirements)