What is the role of TPE/TPR thermoplastic elastomer resin

  • Time of issue:2023-03-20
  • Views:397

What is the role of TPE/TPR thermoplastic elastomer resin

  • Categories:Industry News
  • Author:SPP
  • Origin:en.tpe-sp.com
  • Time of issue:2023-03-20
  • Views:397

  TPE resin thermoplastic elastomer TPE/TPR, also known as synthetic rubber or synthetic rubber. Its products have the excellent properties of traditional cross-linked vulcanized rubber in terms of high elasticity, aging resistance and oil resistance, and at the same time have the characteristics of easy processing and wide processing methods of ordinary plastics. It can be produced by injection molding, extrusion, blow molding and other processing methods, and 100% of the edges of the water outlet are directly used after crushing. Both simplify the processing process and reduce processing costs, so thermoplastic elastomer TPE / TPR material has become the latest material to replace traditional rubber, its environmental protection, non-toxic, comfortable to the touch, exquisite appearance, so that the product more creative. Therefore, it is also a more humane, high-grade new synthetic materials, but also the world's standard environmental protection materials, thermoplastic elastomer, referred to as TPE or TPR, is the abbreviation of Thermoplastic rubber. It is a class of elastomer with the elasticity of rubber at room temperature and plasticized at high temperature. The structure of thermoplastic elastomer is characterized by chemical bonds consisting of different resin and rubber segments, resin segments form physical cross-linking points by virtue of inter-chain forces, and rubber segments are highly elastic chain segments that contribute to elasticity. The physical cross-linking of the plastic segments varies reversibly with temperature, showing the plastic processing properties of thermoplastic elastomers. Therefore, thermoplastic elastomers have the physical and mechanical properties of vulcanized rubber and the process processing properties of thermoplastics, and are a new type of polymer material between rubber and resin, often referred to as third-generation rubber. Since 1958, when Bayer first produced thermoplastic polyurethane (TPU), TPE has been rapidly developed, especially after the introduction of styrene-based thermoplastic elastomers in 1963, the theory on the preparation of thermoplastic elastomers has been gradually improved and the application areas have been further expanded.

  TPE resin thermoplastic elastomer is a new type of polymer material between rubber and resin, not only can replace part of the rubber, but also can make the plastic modified. The dual performance of rubber and plastic and the wide range of characteristics of thermoplastic elastomer make it widely used in the rubber industry for the manufacture of daily-use products such as rubber shoes, rubber cloth and various industrial supplies such as rubber pipes, tapes, rubber strips, rubber sheets, rubber parts and adhesives. At the same time, thermoplastic elastomers can also be used in place of rubber in a large number of general thermoplastic resins such as PVC, PE, PP, PS and even PU, PA, CA and other engineering plastics modification above, so that the plastics industry has also emerged a new situation. Generally speaking, thermoplastic elastomers are divided into 2 categories: chemically synthesized thermoplastic elastomers and rubber-plastic blended thermoplastic elastomers according to different preparation methods. The former is in the form of polymer alone, there are main chain copolymerization, joint technology copolymerization and ionic polymerization. The latter are mainly blends of rubber and resin, including dynamic vulcanization (TPE-TPV) and interpenetrating network polymers (TPE-IPN) that appear as cross-linked vulcanization. Nowadays, TPEs, centered on TPS and TPO, have gained rapid development around the world, and the production and consumption of both have accounted for about 80% of all TPEs. Diene TPEs and vinyl chloride TPEs have also become important varieties of general-purpose TPEs. Others such as TPU, TPEE, TPAE, TPF, etc. have shifted to engineering-oriented.

  TPE resin thermoplastic elastomer has the physical and mechanical properties of vulcanized rubber and the technological processing properties of soft plastic. Since it does not need to be thermally vulcanized like rubber, it can be easily made into final products by using simple plastic processing machinery. This feature shortens the production process of rubber industry by 1/4, saves energy consumption by 25% to 40% and improves efficiency by 10 to 20 times, which is another material and technology revolution in rubber industry. The two main methods of manufacturing thermoplastic elastomers are extrusion and injection molding, and molding is rarely used. Injection molding is a fast and economical way to manufacture thermoplastic elastomers. The injection molding methods and equipment used for general thermoplastics are suitable for thermoplastic elastomers. Thermoplastic elastomers can also be processed by blow molding, thermoforming and heat welding. None of these methods can be applied to thermoset rubber products. Thermoplastic elastomers can be processed and molded with standard thermoplastic processing equipment and processes, such as extrusion, injection, and blow molding. No vulcanization, can be prepared to produce rubber products, reduce the vulcanization process, save investment, low energy consumption, simple process, shorten the processing cycle, improve production efficiency, low processing costs. The edge waste can be recycled, saving resources and also beneficial to environmental protection. Due to the easy softening at high temperature, the use temperature of the products made has certain restrictions.

  Advantages of TPE resin thermoplastic elastomer: It can be processed by general thermoplastic molding machines, such as injection molding, extrusion molding, blow molding, compression molding, and recirculation molding, etc. Can be vulcanized by rubber injection molding machine, the time can be shortened from about 20min to within lmin. It can be vulcanized by press-out machine, with fast press-out speed and short vulcanization time. The scraps produced during the production process (escaped burrs, extruded waste rubber) and the final scrap can be directly returned for reuse. The used TPE products can be reused after simple regeneration, reducing environmental pollution and expanding the source of resource regeneration. No need to vulcanize, save energy, take the energy consumption of high pressure hose production as an example: rubber is 188MJ/kg, TPE is 144MJ/kg, can save more than 25%. Self-reinforcing, the formula is greatly simplified, so that the influence of the compounding agent on the polymer constraints are greatly reduced, and the quality performance is easier to grasp. For the rubber industry to open up new ways to expand the application of rubber products. Disadvantages of thermoplastic elastomers: TPE heat resistance is not as good as rubber, with the temperature rise and the physical properties of the decline is greater, so the scope of application is limited. At the same time, compression deformation, elasticity and durability are poor compared to rubber, and the price is often higher than that of similar rubber. But in general, the advantages of TPE is still very prominent, while the disadvantages are in the process of continuous improvement, as a new energy-saving and environmentally friendly rubber raw materials, the development prospects are very promising.


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