Ps (polystyrene PS) is a commonly used transparent plastics, light transmission rate of 90% or more, behind plexiglass, density 1.05g/cm ³, is a plastic medium-density closest to the water. Is often used to indicate the amount of injection molding machines and output. Electrical insulation (especially high-frequency insulation) excellent, good coloring and water resistance, chemical stability, good strength in general, but the crisp, easy to produce brittle fracture stress, impatience benzene, gasoline and other organic solvents. suitable for production of transparent pieces of insulation. decorative pieces, and chemical equipment, optical instruments and other components.
4 .2Pay attention to matters forming

   ps are amorphous plastics, moisture absorption is small, well-placed in the molding before you can not dry, it is recommended to use 80 ℃ drying before forming 2 hours or so, molding temperature can be 170-270 ℃ to choose between, but the optimum molding temperature of 185 -215 ℃. Molding shrinkage 0.6-0.8%, a wide range of molding temperature and difficult to decompose, but the thermal expansion coefficient, easy to produce internal stress. Good fluidity, it is appropriate temperature and high modulus, low injection pressure, injection time to extend help to reduce stress, prevent shrinkage, deformation. Is available in various forms in the mold gate, gate arc connected with the plastic parts in order to avoid damage to plastic parts when you place the gate. Stripping gradient large, top out evenly. Uniform wall thickness of plastic parts, preferably with no inserts, where inserts should be preheated.