HIPS (High Impact Polystyrene)
High Impact Polystyrene is what its name implies. A few cents more than crystal styrene, to pay for the rubber modifier. HIPS is opaque and very widely used. It has a lower modulus, better elongation, and is a lot less brittle than crystal styrene.
Applications: Household Goods, Containers, Furniture, Housings and Packaging.
|Tensile Strength||Flexural Modulus||Impact Strength||Max Temp.||Chemical Resistance|
|7,500-10,000 psi||160,000 -370,000 psi||3-7 ft-lb/in notched izod||100°-150° F||Poor|
- Optical clarity
- High gloss
- FDA grades available
- Low cost
- Good dimensional stability
- Good rigidity
- Flammable, but flame retardant grades available
- Poor solvent resistance
- Homopolymers are brittle
- Subject to stress and environmental cracking
Brand Names: Certene, Hival, Polystyrol, Styron