The colors of the products made of PP and PS are similar, and the products made by them are generally difficult to distinguish the material from the appearance. .

PP: Polypropylene, is a translucent, semi-crystalline thermoplastic.
PS: Polystyrene, environmentally friendly and non-toxic, has very good plasticity, poor toughness and brittleness.

So how to distinguish between PP and PS?

  • The difference in sound: The PS material is harder, so the percussive sound sounds more crisp. The PP material has good toughness and insufficient hardness, so the sound is dull.
  • The difference in appearance: PS can be very transparent, PP is not very transparent, it still looks like frosted glass.
  • The difference in texture: pp has good toughness, while ps is more rigid.

Generally speaking, the same thickness of pp and ps products, transparency: PS>PP, hardness: PS>PP, toughness PP>PS.