Material properties
<1> Chemical resistance
<2> Glossy, partially transparent or translucent
<3> Most of them are good insulators
<4> Light and strong
<5> Easy processing, mass production, and low price
<6> Wide range of uses, many effects, easy coloring, and partial high temperature resistance
advantage
1. Most plastics have strong corrosion resistance and do not react with acids and bases.
2. Plastic manufacturing costs are low.
3. Durable, waterproof and lightweight.
4. Easy to be molded into different shapes.
5. It is a good insulator.
6. Plastics can be used to prepare fuel oils and fuel gases, which can reduce crude oil consumption.
PP
Polypropylene
"No. 5" PP is commonly used in: soy milk bottles, yogurt bottles, juice drinks bottles, microwave lunch boxes.
Use: Common melting point up to 167 °C, is the only plastic box that can be safely placed in the microwave oven, can be reused after careful cleaning. Need special attention, some microwave lunch boxes, the box is indeed made of No. 5 PP (microwave oven special PP high temperature 120 ° C, low temperature -20 ° C)
PC
Other plastic
Others of the "No. 7" PC are commonly used in: kettles, cups, and bottles.
Use: A material that is used in large quantities, especially in bottles, is controversial because it contains bisphenol A. Lin Hanhua, an associate professor in the Department of Biology and Chemistry at the City University of Hong Kong, said that in theory, as long as the bisphenol A is converted into a plastic structure during the production of PC, it means that the product is completely free of bisphenol A.
