PVC is actually a kind of vinyl polymer, and its material is a kind of non crystalline material. Stabilizer, lubricant, auxiliary processing agent, pigment, anti impact agent and other additives are often added to PVC materials in actual use. It is nonflammability, high strength, weather resistance and excellent geometric stability. PVC has strong resistance to oxidant, reductant and strong acid. However, it can be corroded by concentrated oxidizing acid, such as concentrated sulfuric acid and concentrated nitric acid, and it is not suitable for contacting with aromatic hydrocarbon and chlorinated hydrocarbon.
Thermoplastic elastomer TPE is also called thermoplastic rubber TPR It is a kind of material with rubber and thermoplastic characteristics. Thermoplastic elastomer has many possible structures. The most fundamental one is to have at least two mutually dispersed polymer phases. Under normal use temperature, one phase is fluid (making the temperature higher than its TG vitrification temperature), the other phase is solid (making the temperature lower than its Tg or equal to its TG), and there is phase between the two phases Interaction. That is to say, the polymer material which shows the elasticity of rubber at room temperature and can be plasticized and formed at high temperature has the mechanical properties and use properties similar to rubber, and can be processed and recycled according to thermoplastic plastic. It has built a bridge between plastic and rubber. Therefore, thermoplastic elastomer can process rubber products as quickly, effectively and economically as thermoplastic. In terms of processing, it is a kind of plastic; in terms of properties, it is also a kind of rubber. Thermoplastic elastomer has many advantages over thermosetting rubber. At present, there is no unified name for thermoplastic elastomer. It is customary to use the abbreviation TPR for thermoplastic rubber and TPE for thermoplastic elastomer, both of which are used in relevant materials and works. For the sake of unity, TPE or thermoplastic elastomer are used. At present, SBS (styrene butadiene styren block copolymer) is called in China, The thermoplastic isoprene styrene block copolymer is called SIS (styrene isoprene block copolymer), while the saturated SBS is called SEBS (styrene ethylene butylene styrene block copolymer). Other kinds of thermoplastic elastomers are called by the manufacturer's trade name. SBS code is also used in our country, which means thermoplastic styrene butadiene styrene block copolymer, commonly known as thermoplastic styrene butadiene rubber. 2. Elastomer is a kind of man-made thermoplastic elastomer with unique properties, which has a very wide range of applications. Its excellent product applicability comes from the adjustability and controllability of its special molecular structure, which shows the following excellent properties: □ superior physical properties: good appearance texture, mild touch, easy coloring, uniform color and stability; adjustable physical properties, providing broad product design space; mechanical properties can be compared with vulcanized rubber, but no vulcanization crosslinking; Wide hardness range, adjustable from short-a 0 ℃ to short-d 70 ℃; excellent tensile resistance, tensile strength up to a dozen MPa, elongation at break up to more than ten times; long-term temperature resistance can exceed 70 ℃, good low temperature environment performance, good winding at - 60 ℃, good electrical insulation and voltage resistance. It has outstanding antiskid performance, wear resistance and weather resistance □ superior chemical performance and resistance to general chemicals (water, acid, alkali, alcohol solvents); it can be processed in solvent, and can be soaked in solvent or oil for a short time; it is non-toxic; it has good UV radiation resistance and oxidation resistance, and can be used in outdoor environment; It has good adhesion performance, and it can be directly bonded with synthetic leather or artificial leather surface by using appropriate adhesive technology. Advantages of production and processing: it has the characteristics of traditional vulcanized rubber without vulcanization, saving auxiliary materials such as vulcanizing agent and accelerant; it is suitable for injection molding, die casting, hot melting and dissolving coating and other processes; the leftover material, surplus material and waste material can be completely recycled and reused without modification, reducing waste; Simplify processing technology, save processing energy consumption and equipment resources, short processing cycle, reduce production cost and improve work efficiency; simple processing equipment and technology, save production space, reduce the rate of unqualified products; non-toxic products, no irritant smell, no harm to the environment, equipment and personnel; materials can be reused, side and foot waste can be recycled, so to speak, no waste in production; There are less processing aids and admixtures, which can save the cost of product quality control and detection; the product has high dimensional accuracy and quality is easier to control; the material proportion is small and adjustable; it can be directly mixed with PP, ABS and other plastics to make special plastic alloy. The elastomer has superior physical and chemical properties and is easy to process. At the same time, the product has the advantages of non-toxic, pollution-free and recyclable secondary processing. Therefore, it is widely used in many industrial fields, such as toys, sports equipment, shoes, stationery, hardware, electric tools, communications, electronic products, food and beverage packaging, household appliances, kitchen supplies, medical equipment, automobiles, construction engineering, wires and cables, etc. What's more, it's a high-quality material leading the design of new products and market orientation. Its soft texture, adjustable physical properties, hardness, suitability for various processing technologies and environmental protection advantages provide a huge space for product designers to play, which will undoubtedly help you innovate products, increase value and lead the market trend