Polytetrafluoroethylene -------- ---- the king of plastics
Teflon is a novel plastic.It was discovered during world war ii, and formal production was only nearly 20 years old.So why is teflon called the "king of plastics"?Because it has many properties that...
Introduction of the action characteristics of PET film
PET is an abbreviation of plastic. PET plastic is usually used in food, medicine, etc.; can be used as packaging bottles, such as cosmetic bottles, medicine bottles, etc.; can also be used in auto...