The materials and composition of PE plastic bags

What is the name of the main raw material for PE plastic bags? Its full name is Polyethylene, also known as Polyethylene in Chinese. It is a structurally simple polymer organic compound widely used in the world today. It is polymerized from ethylene and divided into high-density polyethylene, linear low-density polyethylene, and low-density polyethylene according to density. The production process of Pe plastic bags mainly includes the following points: A、 Slurry method. Polymerization in diluents (such as hexane) is an early industrialized and currently high-yielding method. B、 Liquid phase ontology method. Polymerization in liquid propylene at 70 ℃ and 3MPa. C、 Gas phase method. Polymerization of propylene under gaseous conditions. The latter two methods do not use diluents, have short processes, and low energy consumption. The liquid-phase ontology method has now shown advantages of catching up from behind. PE plastic bags can be divided into PE flat bags, PE line bags, PE self-adhesive bags, PE zipper bags, PE iron bone bags, PE self sealing bags, PE organ bags, and PE handle bags according to the different styles of plastic bags made The forming characteristics of Pe plastic bags: A、 Crystalline materials have low moisture absorption and are prone to melt fracture. They are prone to decomposition when in long-term contact with hot metals. B、 Good liquidity, but large shrinkage range and value, prone to shrinkage Dents and deformations. C、 The cooling speed is fast, the pouring system and cooling system should be slowly dispersed, and attention should be paid to controlling the molding temperature When the material temperature is low or high, it is easy to orient. When the mold temperature is below 50 degrees, the plastic parts are not smooth and prone to poor welding, flow marks, and warping deformation above 90 degrees. D、 The plastic wall thickness must be uniform, avoiding missing glue and sharp corners to prevent stress concentration. PE plastic bags can be made as thin as 2.5 threads on one side, while on the market they are usually as thin as 3 threads, greatly reducing product costs. The 2.5 thread PE sealed pocket still has good sealing performance. Easy to use (simply insert the product and lock the bone strip). Customization is available for any thickness between 2.5 and 15 threads. The thick PE sealed bag is firm on both sides and has non explosive edges. The PE plastic bag has good transparency and can be reused. PE sealed pockets can be printed and perforated (anti inflation), and the plastic bag mouth can be made in red (red edge) or white (white edge). The quantity is accurate, not small, not small in thickness. One hundred per pack, neatly packaged. The main characteristics of PE plastic bags are non-toxic, odorless, low density, and superior strength, stiffness, hardness, and heat resistance compared to low-pressure polyethylene. They can be used at around 100 degrees Celsius Has good electrical performance and high-frequency insulation that is not affected by humidity, but becomes brittle, wear-resistant, and prone to aging at low temperatures Suitable for making general mechanical parts, corrosion-resistant parts, and insulation parts. Common acidic and alkaline organic solvents have almost no effect on it, and can be used for tableware, handicrafts, toys, hardware, electronics, clothing, agriculture, food, and gifts.