PP is the abbreviation for polypropylene, a member of the thermoplastic family. Much like dough, this material can be repeatedly heated and molded; it is characterized by properties such as resistance to acids and alkalis, as well as light weight. Many everyday items-such as food storage containers, beverage bottle caps, and medical syringes-are manufactured using PP material.
"PP-grade" specifically refers to polypropylene material that meets a set of specific requirements, primarily defined by three key aspects:
High purity, with strict control over impurities
A typical temperature resistance range of -20°C to 120°C
Possession of excellent mechanical strength and chemical stability
When selecting PP products, consider paying attention to the following details:
Translucency: High-quality PP appears semi-transparent
Tactile Feel: The surface should be smooth and free of burrs
Odor: When heated, it should emit only a faint plastic scent
Elasticity: It should quickly return to its original shape after being bent