Polyurethane(PU) is the macromolecular compounds with repeating carbamate groups in the main chain. Polyurethanes with different properties can be manufactured by using different chemical structures of raw materials and formulation proportions. It has been widely used in plastics, rubber, foam, fiber, coating material adhesives and functional polymers, and has the most kinds and uses. Polyurethane industry chain includes raw materials and products, in which raw materials are the critical part. Its raw materials include isocyanates (such as TDI and MDI), polyhydric alcohols (such as PO and PTMEG) and auxiliaries (such as DMF).
Coating material is composed of film-forming substances, solvents, pigments and various additives. It is a kind of material which is coated on the surface of the object by different construction techniques to form a solid film with strong adhesion, strength and continuity. The film can reduce the corrosion and wear of the external material on the surface of the object, thus prolonging the service life of the object.illers can give the product a beautiful appearance. Adding different additives can endow the material surface with the characteristics of wear resistance, heat resistance, corrosion resistance, flame retardant, conductivity, antistatic, fluorescence and mildew resistance. Surface wear resistance, heat resistance, corrosion resistance, flame retardant, conductive, anti-static, fluorescent, anti-mildew and other characteristics.
Adhesive, also known as glue, is a natural or synthetic mixture that connects various materials through the adhesion of interface and material cohesion. The adhesive consists of a variety of substances, such as basic gum, curing agent, diluent, toughening agent and filler. It is used in electronics, automobile, industry, chemical industry and architecture. There are many kinds of adhesives, such as acrylate adhesive, epoxy resin adhesive, polyurethane adhesive.
Rubber is a kind of high elastic polymer, which can be used in daily life or made into part of production equipment. Rubber material comprises natural rubber and synthetic rubber. Natural rubber is mainly extracted from rubber tree and rubber grass. Its main component is polyisoprene, which can be made into tires, elastic belts, surgical gloves and rubber tubes. Synthetic rubber is polymerized from petroleum cracking products. It has excellent thermal stability and corrosion resistance. Since the 1940s, synthetic rubber has been widely used in industry and agriculture, national defense, transportation and daily life.
Plastic is a common material in our life. There are many products made of plastic, including plastic bags, plastic kitchenware, electrical shell, mechanical parts, etc. The first synthetic plastic was made by Leo Hendrick Baekeland, who patented phenolic plastic, on July 14, 1907. So far, there are more than 300 kinds of plastics produced in the world. Polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS) and acrylonitrile butadiene styrene copolymers (ABS) are the most widely used plastic materials. There are also some plastics that can bear some external forces, with good mechanical properties and thermal stability. The plastics are used as engineering plastics such as polyamide and polysulfone resin.
Textile Manufacturing involves many branches, such as chemical fiber, spinning, weaving, printing and dyeing and finishing auxiliaries. China has the most complete textile industry chain in the world. Fabric fiber can be divided into natural fiber, Rayon and synthetic fiber. Natural fibers are obtained from cotton, gunny, animal hair and silk. Rayon refers to chemical modified natural fiber. Synthetic fiber is a kind of linear organic polymer synthesized by polymerization of petroleum cracking products. With refining, dyeing and finishing auxiliaries, the fibers can be directly woven into filaments. In the process of dyeing and printing, dyes make the fabric have many colors, such as direct dyes, azoic dyes, acid dyes. Mildew inhibitor, flame retardant and softener are also used to make the fabric have better quality.
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