First, let's understand that polystyrene (PS) refers to the polymer synthesized by free radical addition polymerization of styrene monomer. It is a colorless and transparent thermoplastic plastic, which is difficult to degrade.

Polystyrene (PS) includes ordinary polystyrene, expanded polystyrene (EPS), high impact polystyrene (HIPS) and syndiotactic polystyrene (SPS).

performance

Ordinary polystyrene resin is non-toxic, odorless, colorless transparent particles, glass like brittle material. Its products have high transparency, light transmittance of more than 90%, good electrical insulation performance, easy coloring, good processing fluidity, good rigidity and good chemical corrosion resistance.

The disadvantages of ordinary polystyrene lie in its brittleness, low impact strength, stress cracking, poor heat resistance and boiling water resistance, and poor solvent resistance and oxidation resistance. Polystyrene is prone to aging under heat, oxygen and atmospheric conditions. Polystyrene products will become yellow and brittle in long-term use.

Expanded polystyrene (EPS)

Expanded polystyrene (EPS) is a variety of polystyrene (PS), which is made by dipping low boiling point physical foaming agent in ordinary polystyrene. It foams when heated during processing, and is specially used to make foamed plastic products.

Expanded polystyrene has been widely used in many fields due to its excellent and durable thermal insulation, unique shock absorption, aging resistance and water resistance.

It has the advantages of light weight, low price, low thermal conductivity, small water absorption, good electrical insulation, sound insulation, shock resistance, moisture-proof, simple molding process, etc.