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.

Advantage

 

Optical Clarity
High gloss
FDA grades available
Low cost
Good dimensional stability
Good rigidity

Disadvantage

 

Flammable, but flame retardant grades available
Poor solvent resistance
Homopolymers are brittle
Subject to stress and environmental cracking

Tensile StrengthFlexural ModulusImpact StrengthMax Temp.Chemical Resistance
7,500-10,000 psi160,000-370,000 psi3-7 ft-lb/in notched izod100°-150° FPoor