Polypropylene is a thermoplastic resin polymerized from propylene. According to the arrangement position of methyl groups, they can be divided into isotactic polypropylene, atactic polypropylene and syndiotactic polypropylene. Polypropylene is a non-toxic, odorless and highly crystalline polymer with a density of only 0. 90-"0.9 1g/cm3 is one of the lightest plastics at present. It is particularly stable to water, and its water absorption in water is only 0. 0 1%, and the molecular weight is about 80,000-1.5 million. Good formability, but due to the large shrinkage rate (1%~2.5%), thick-walled products are easy to sag, and it is difficult to meet the requirements for some parts with high dimensional accuracy, and the products have good surface gloss and are easy to be colored.

Polypropylene futures is a futures contract with polypropylene as the trading target, which is listed and traded on large exchanges. The details of the contract are as follows: the trading unit of the polypropylene futures contract is 5 tons/lot, the minimum change price is 1 yuan/ton, the contract price limit is 4% of the settlement price of the previous trading day, the minimum trading margin is 5% of the contract value, the contract trading month is1-65438+February, and the last trading day. The maximum order quantity of a polypropylene futures contract trading order at a time is 1000 lots, and the delivery unit is 5 tons/lot.