2. Futures trading rules: T+0 trading, two-way trading, and no price limit, margin trading, futures trading time: Monday to Friday 9:00- 1 1:00, 13:30- 15:00, night trading.
1. Polyethylene plastic is also a common thermoplastic in daily life. Its molecular structure is similar to paraffin, but its molecular weight is much larger. Some of its properties are a bit like paraffin. Its surface is waxy, soft, lubricated and translucent, but it is much tougher than paraffin. . More than half of high-pressure polyethylene is used in film products, followed by pipes, injection molding products and wire coatings. Medium and low pressure polyethylene is mainly composed of injection molded products and hollow products. Ultra-high pressure polyethylene: Ultra-high molecular weight polyethylene has excellent comprehensive properties and can be used as engineering plastics.
2. Compared with metal, polyethylene has light weight, good chemical stability, corrosion resistance, small resistance to fluid and certain elasticity. The pipe made of it has the characteristics of easy installation, flexibility, easy welding and pressure resistance. , can be used in the chemical industry to transport various liquids and gases, such as water, salt solution, lye, water vapor, etc. Polyethylene plastic also has the characteristics of sun resistance and water resistance. The film made of it can be used to build a nursery greenhouse; The fishing net woven with it is light and strong, and it is not easy to rot.
3. Polyethylene is odorless, tasteless, non-toxic, with dull surface and milky wax-like particles. It has excellent low temperature resistance, good chemical stability and resistance to most acid and alkali corrosion. Insoluble in general solvents at room temperature, with low water absorption. However, polyethylene plastic also has its disadvantages: low strength, high temperature resistance, and can only be used below 80℃. At the same time, it has certain air permeability, and the film or plastic bag made of it is not suitable for packaging spices and alcoholic beverages.