How to judge the quality of PP sheet

First, look at its surface gloss, poor gloss is recycled plastic; 

Second, look at its toughness: pure raw material PP polypropylene plastic board toughness is very good and can be slightly bent;

Third, look at the cutting surface: there will be different colors of impurities inside the recycled plastic cutting; 

Fourth, look at its density: PP polypropylene density of 0.92~0.93 floating on the water are raw polypropylene;

Fifth, heating welding: recycled plastic welding will have smoke; 6. Transmittance: poor transmittance of recycled plastics; Seven, toughness: recycled plastics are also much worse; Eight, density: throw in the water to see if it is floating on the surface of the water, most of the regeneration is sunk;