At Sinopec's booth, there are various plastic product series: "PP zipper EVA zipper PVC zipper", including car bumpers, bulletproof vests, stab proof gloves, and plastic for household appliances. The staff introduced that the raw material of the bulletproof vest is also a plastic chemical product called ultra-high molecular weight polyethylene, which has a particularly high density and hardness. A bulletproof vest made of this plastic cannot be pierced by an AK47 rifle 10 meters away. The stab proof gloves on display can make people empty-handed against the blade.

Sometimes, plastic zippers don't pull very smoothly. Yuntianhua Company brought the plastic raw material "polyformaldehyde" yesterday to solve this problem. A staff member introduced that this plastic material has strong self-lubrication, and the zipper made of it is not only smooth to pull, but also wear-resistant.