Filling to reduce the cost of plastics refers to the addition of low-cost fillers, or fillers, into the resin. The commonly used fillers are natural minerals and industrial waste residue, in addition to organic fillers such as wood powder and fruit shell powder, waste thermosetting plastic powder, etc. Filler is one of the most widely used and consumed additives in plastics. The purpose of filling is to reduce the cost of thermoplastic plastics, and to reduce the cost and modification of thermosetting plastics. In addition to reducing the cost, filling can not improve some properties of the products. Generally, rigidity, heat resistance (inorganic filler), dimensional stability, reduction of molding shrinkage and creep resistance can be improved; some can also improve insulation, flame retardancy, smoke elimination and sound insulation. Common fillers (1) natural mineral fillers a, CaCO3 fillers B, talc fillers C, wollastonite fillers D, kaolin fillers e, mica fillers F, diatomite fillers to reduce the cost of plastics (1) oil absorption and resin absorption of fillers a, oil absorption of fillers B, resin absorption of fillers In view of the above two kinds of oil absorption and resin absorption, the following points should be paid attention to in the design of filling formula. a. When there are liquid additives in the formula system, the filler with small oil absorption should be selected. b. When the liquid resin is contained in the formula system, the filler with small resin absorption should be selected. (2) The purpose of surface treatment of fillers is to reduce the hydrophilicity of fillers, improve the lipophilicity of fillers, and increase the compatibility between fillers and resins. a. Coupling treatment of fillers coupling treatment of fillers is a method to activate the surface of fillers with coupling agents. In the specific selection of coupling agent, we should pay attention to the following points. (a) The cost reduction of plastics is a process of mixing low-cost resins or waste plastics into high-cost resins to achieve the purpose of reducing costs. Compared with the cost reduction of plastics filled with fillers, the cost reduction is not very large, but it has the advantages of less impact on its own properties. Among the resins used, the relatively low-cost resins are PVC, LDPE, LLDPE, HDPE, PP and PS. the so-called low-cost blending resins are mixed with these resins.
Dongguan Beite packaging materials Co., Ltd. - located in Dongguan City, the world's manufacturing city, is a subsidiary of Beite packaging (China) Co., Ltd., with a plant area of 6000 square meters. It is a flexible packaging enterprise integrating R & D, production and sales. It has a complete set of domestic advanced production equipment, a scientific and humanized management system and a group of experienced technical personnel For backing, to provide customers with quality products and first-class service.
The company produces composite bags, roll film, fruit bags, aluminum foil bags, suction mouth bags, self-supporting bags, zipper bags, anti-static bags, special-shaped bags, etc., which are suitable for the internal and external packaging of food, daily chemicals, electronics, toys, medicine, cosmetics, industrial products and other industries.
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