How to judge the quality of PP plastic board

1. Look at the surface gloss. The gloss is poor.
2. Look at its toughness. Pure raw material PP polypropylene plastic sheet has excellent toughness.
3. Look at the cutting surface. After the recycled plastic is cut, there will be different colors of the mixed materials.
4. Look at the density of PP polypropylene. The density of the polypropylene is 0.92~0.93.
5. Heat welding and welding