Polypropylene (PP) is a common thermoplastic polymer. It has stable chemical properties, good heat resistance, and is not easy to react with acids and alkalis. Therefore, it is considered to be a relatively safe material. PP materials are very common in various packaging, including cups made of PP, which are very common and suitable for various beverages. This universality of application is inseparable from the chemical properties of PP materials.
PP is a polymer generated by polyaddition reaction of propylene monomers. Its chemical formula is (C3H6)n. Its excellent chemical properties can be brought into products to reflect:
1. Heat resistance: The melting point of PP is usually between 130-171℃, which makes it able to withstand high temperatures and is not easy to deform or decompose. Therefore, PP cups can also be used to hold hot drinks. However, in some extreme or continuous high temperature environments, it is best to avoid using them.
2. Chemical corrosion resistance: PP has good resistance to most acids and alkalis, is not easy to react chemically, and the beverage ingredients in contact with it are not easy to affect the cup product.
3. Mechanical strength: PP cups have high mechanical strength and toughness, are not easy to break, and are safe to hold in your hand.
4. Non-toxic: Under normal use conditions, PP material will not release harmful substances and can be used with confidence.
