What is the price of tpe soft rubber in Hebei? tpe encapsulated pp material
Source：德創化工Time：2021-04-15Hits：2289
Styrene TPE, also known as TPS, is a block copolymer of butadiene or isoprene and styrene, and its performance is closest to SBR rubber. The representative variety is styrene-butadiene-styrene block copolymer (SBS), which is widely used in footwear industry and has mostly replaced rubber. At the same time, its application in industrial rubber products such as adhesive tape and rubber sheet is expanding. SBS is also widely used as impact modifier for PS plastics, and is also an excellent modifier for wear resistance, crack resistance, soft resistance and skid resistance of asphalt pavements.
PS plastics modified by SBS can not only greatly improve the impact resistance like rubber, but also have very good transparency. Compared with SBR rubber and WRP rubber powder, SBS modified asphalt pavement is easier to dissolve in asphalt. Now, waterproofing materials are further applied to waterproof and moistureproof roofs, subways, tunnels, trenches, etc. Compared with the original PVC and EVA plastic sponge, the sponge made by SBS and S-SBR and NR rubber is richer in rubber touch, lighter than vulcanized rubber, bright in color and clear in pattern. Therefore, it is not only suitable for making sponge for rubber shoe midsole, but also an ideal material for disposable outsole such as travel shoes, sports shoes and fashion shoes.
In recent years, isoprene-substituted butadiene block styrene polymer (SIS) has developed rapidly. The hot melt adhesive made of SIS not only has superior viscosity, but also has good heat resistance. Now it has become the main material of hot melt adhesive in America, Europe and Japan.
The biggest problem of SBS and SIS is that they are not heat-resistant, and the service temperature generally cannot exceed 80℃. At the same time, its tensile strength, weather resistance, oil resistance, wear resistance, etc. can not be compared with rubber. Therefore, in recent years, the United States and Europe and other countries have made a series of performance improvements, and SEBS and SEPS with saturated hydrogenation of SBS and SIS appeared successively. SEBS (with BR hydrogenation as soft segment) and SEPS (with IR hydrogenation as soft segment) can greatly improve the impact strength, weather resistance and thermal aging resistance. In 1984, Mitsubishi Chemical of Japan made a mixture with better performance based on SEBS and SEPS, and named this saturated TPS "Rubberron". Therefore, SEBS and SEPS are not only universal, but also blend materials of engineering plastics to improve weather resistance, wear resistance and thermal aging resistance, and have become compatibilizers of engineering plastics such as nylon (PA) and polycarbonate (PC). In addition, many new varieties have been developed, such as high transparency TPS for epoxy resin and nontoxic TPS for health care.
IPN TPS can also be formed by melt blending SBS or SEBS with PP plastics. Although most of them belong to thermosetting resins, there are also many thermoplastic elastomers like TPE in the form of cross continuous phase. IPN-TPS formed by SBS or SEBS and other engineering plastics can be directly coated without pretreatment. The coating is not easy to scratch, and has certain oil resistance. The elastic coefficient has no change in a wide temperature range at low temperature, which greatly improves the cold resistance and heat resistance of engineering plastics. TPE with thermoplastic properties can also be obtained by graft copolymerization of styrene compounds with rubber, and EPDM/ styrene, BR/ styrene, CI-IIR/ styrene, NR/ styrene and so on have been developed.
