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(Polystyrene)
Specific gravity: 1.05 g/cm3
Mold shrinkage: 0.6-0.8%
Molding temperature: 170-250℃
Material performance
Excellent electrical insulation (especially high-frequency insulation), colorless and transparent, light transmittance second only to plexiglass, coloring, water resistance, and good chemical stability. The strength is moderate, but the quality is brittle, and it is easy to cause stress brittleness. Resistant to benzene, gasoline and other organic solvents. Suitable for making insulating transparent parts, decorative parts, chemical instruments, optical instruments and other parts.
Forming performance
1. Amorphous material, low moisture absorption, no need to be fully dried, not easy to decompose, but the coefficient of thermal expansion is large, easy to produce 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 prolonging the injection time is beneficial to reduce internal stress and prevent shrinkage and deformation.
3. Various forms of gates can be used, and the gates are connected with the arc of the plastic parts to avoid damage to the plastic parts when the gate is removed. The demolding angle is large and the ejection is uniform. The wall thickness of the plastic parts is uniform, preferably without inserts, If there are inserts, they should be preheated.
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