1, with different scientific names.

PP is called polypropylene and PPS is called polyphenylene sulfide, which are two completely different plastics.

2. Different uses

PP is a very common plastic with a wide range of uses. For example, household appliances, small commodities, advanced toys and many other aspects will be used. However, its surface ability is poor and its polarity is low, so it is often not attached to paint.

PS has excellent electrical insulation (especially high-frequency insulation), colorless and transparent, light transmittance is second only to plexiglass, coloring water resistance and good chemical stability. The strength is average, but it is brittle, prone to stress embrittlement and not resistant to organic solvents such as benzene and gasoline. Suitable for making insulating transparent parts. Decorative parts, chemical instruments, optical instruments and other parts.

3. Different thickness?

Generally speaking, PS is thicker than PP for larger barrels made of these two materials.