TPE and TPR are a kind of rubber and plastic materials with the fastest application in recent years. They cover many kinds of branches and can be adjusted to change the physical properties of materials through mixing system. Therefore, TPE and TPR are more and more widely used in all walks of life. TPES,TPEV and TPU are the main thermoplastic elastomers. TPES based on SBC is the most commonly used branch of TPE, which is also known as TPE and TPR(based on SEBS and SBS). In this paper, TPE and TPR based on SEBS are taken as examples to discuss the main characteristics of elastomer TPE.
      TPE has a wide range of applications because of its multifaceted properties. In this paper, based on many years of industry experience, the author summarizes the characteristics of TPE in seven words -- "elastic, plastic, sticky, scratch, soft, safe and stable", hoping to help readers understand the characteristics of TPE. The following is the elastomer TPE|TPR characteristics "seven words jue" interpretation：

      1."Play" character formula

      Play - this is the core feature of TPE|TPR. TPE thermoplastic elastomers differ from other polymer materials in that they are elastic. Elasticity refers to the fact that TPE materials will deform under the action of external force, but the material can return to its original shape after the external force is removed. TPE|TPR, its elastic recovery, vulcanized rubber than inferior. Because vulcanized rubber is vulcanized, the material is a crosslinked structure, and TPE is a block structure of hard and soft segments, and the structure formed by rubber phase and reinforced plastics is also a physical crosslink. Compared with the physical crosslinking structure of TPE, the crosslinked structure of vulcanized rubber has better resistance to permanent deformation. In other words, the resistance to permanent deformation of TPE needs to be improved, with obvious stress relaxation. Moreover, different TPE mixing systems have different resilience.

      TPE|TPR elastic, extended to seal, buffer shock absorption and other functional characteristics, mainly used in some buttons, buttons, seal strip, seal ring, shock cushion products.

      2."Su" character formula

     Plastic - this is an important processing characteristic of TPE|TPR. Plastic refers to TPE materials that can be repeatedly plasticized at high temperature and recycled for reuse. This is also the advantage of TPE compared with rubber. Rubber people know that rubber waste products can not or difficult to be recycled, and TPE waste can be 100% recycled. TPE,TPR plastic characteristics, so that TPE can be quickly injection, extrusion processing molding, compared with rubber, greatly shorten the production processing cycle. Therefore, TPE, TPR is also known as thermoplastic rubber.

      3."Soft" character formula

      Soft - this is TPE|TPR tactile characteristics. In today's society, people increasingly pursue comfortable skin touch and softness. TPE|TPR is a soft material, and its softness and hardness can be adjusted in a wide range by adjusting the mixing system (TPE hardness can be adjusted in 0~100A). At present, many TPE application industries, such as wire, sex toys, soles, various tools (handles), etc., make full use of the flexible characteristics of TPE to bring users comfortable soft touch experience.

      4."Stick" character formula

      Adhesion - is the processing characteristics of TPE. Here, it does not mean that TPE material surface itself has viscosity, but refers to TPE|TPR material can be through injection molding extrusion process, and other materials (usually plastic) through adhesive coating action, composite into a whole piece. TPE adhesive characteristics, the industry is more commonly known as the package, package, secondary injection.

      The bonding effect of TPE is mainly based on the fact that TPE has similar polarity (close solubility parameter) to the adhered coated plastic. Under the condition of high temperature plasticizing and melting, TPE and coated plastics have completed the bonding of materials through melting ablation and penetration at the molecular level. Moreover, after cooling at room temperature, the bonding can be firm and lasting. The stickiness of TPE is usually combined with its flexibility to create a new world of soft touch for people.

      5."Scratch" character formula

      Scraping - this is used to measure the surface properties of TPE materials. There is currently no industry standard for scratch resistance. It is user makes individual character requirement according to respective and different product commonly. Excellent scratch resistance TPE material, should be able to make the surface with nails after no traces, or scratch can be quickly eliminated. TPE with good scratch resistance can be scratched on the surface of the material with nails, but there will be no white scratch, or even scrape out the powder. General mineral filled powder more TPE, the price is cheaper, but the scratch resistance is poor, but there are special TPE series. Additional shoe material industry has the concept that mentions wear-resisting. Similar to scratch resistance, but different industry and performance requirements.

      6."An" word formula

      Ann -- this refers to the environmental safety of TPE|TPR material and whether it is harmful to human body. TPE|TPR material does not contain toxic plasticizer (o-benzene), does not contain PAHs, does not contain nonylphenol NP, does not contain bisphenol A, and conforms to ROHS,REACH(SVHC),EN71 and relevant food grade FDA testing standards. TPE is environmentally safe and non-toxic material.

      7."Ding" character formula

      Fixed - this refers to customizable TPE,TPR materials. The application field of TPE and TPR of thermoplastic elastomer is gradually expanded and deepened, and the material requirements of users will be more and more special and personalized. In addition to conventional injection molding, plastic coated TPE, in recent years, users looking for foam, conductive, chemical resistance, aging resistance, (halogen-free) flame retardant, blow molding, laser welding, radium carving and other special requirements of TPE materials. This puts forward higher requirements on the innovative ability of material research and development of TPE production enterprises. Only by conforming to the market development trend, continuously developing materials that can meet customers' ever-changing performance requirements, and providing customized TPE material solutions according to customers' requirements, can we take the advantage in the competition and realize the sustainable development of the enterprise.