Thermoplastic vulcanized rubber (English) is abbreviated as TPV, and thermoplastic vulcanized rubber is abbreviated as TPR in Chinese, but this name is easily confused with other kinds of thermoplastic elastomers (English). Because thermoplastic elastomer is usually called thermoplastic rubber, especially styrene elastomer, it seems that "TPR" has become its proper term at least in China. When TPR is mentioned, it refers to thermoplastic elastomers such as SBS and SEBS, which are mainly styrene elastomers, which is inseparable from the large consumption of styrene elastomers in civil and end consumer goods.
If the name of thermoplastic vulcanized rubber is more detailed, it should be thermoplastic dynamic vulcanized rubber (English). The word "dynamic" is added to explain the process of producing this kind of thermoplastic vulcanized rubber-dynamic vulcanization, which means that rubber is vulcanized during the melting and mixing of rubber and thermoplastic. Of course, rubber is constantly mixed with thermoplastic while being vulcanized. The corresponding thermoplastic static vulcanized rubber means that the rubber is vulcanized according to the traditional method, and then the vulcanized rubber is ground into powder by grinding equipment, and finally mixed with molten thermoplastic. Theoretically, TPV with excellent performance can also be prepared by this method, but so far, it is only in the laboratory stage.
form
TPV is mainly composed of two parts, one is plastic as continuous phase, and the other is rubber as dispersed phase. Usually rubber needs to be matched with softening oil or plasticizer. Vulcanizing agents and some additives are also essential. In addition, in order to reduce the cost or improve some properties, some inorganic fillers will be added.
Many plastics and rubber can form TPV, but only a few * * * mixtures have practical value after dynamic vulcanization. At present, there are PP/PE/EPDM, PP/NBR, PP/ACM, PS/SEBS and so on. In the book Thermoplastic Elastomer published by Chemical Industry Press, 99 kinds of rubber/plastic * * * mixtures prepared from1/kloc-0 and 9 kinds of plastics are reviewed. It has been found that in order to obtain a rubber/thermoplastic dynamically vulcanized * * * mixture with the best performance, the following conditions must be met:
(1) Surface energy matching between plastic and rubber;
(2) The molecular chain length of rubber entanglement is relatively low;
(3) The crystallinity of plastic is greater than 15%. When the polarity or surface energy of plastic and rubber are quite different, an excellent * * * mixture can also be obtained by adding a suitable compatibilizer and then dynamically vulcanizing.
Specific performance
1, good elasticity and compression deformation resistance, environmental resistance and aging resistance equivalent to EPDM, oil resistance and solvent resistance equivalent to general chloroprene rubber.
2. The applicable temperature range is wide (–60-150℃), and the soft and hard application range is wide (25A—54D). The advantages of easy dyeing greatly improve the freedom of product design.
3. Excellent processing performance: it can be processed by injection, extrusion and other thermoplastic processing methods, which is efficient, simple and easy, without adding equipment, with high fluidity and small shrinkage.
4, environmental protection, recycling, repeated use for six times without obvious decline in performance, in line with EU environmental protection requirements.
5. Light specific gravity (0.90-0.97), uniform appearance quality, high surface grade and good hand feeling.
Based on the above performance characteristics, compared with traditional rubber materials, other TPE elastomers (including TPR\SBS, SEBS, TPU, etc. ) or PVC and other plastic materials, TPV has certain substitution advantages in comprehensive performance and comprehensive cost, thus providing new choices for product enterprises in product innovation, product added value and competitiveness.
TPV is the largest monitor manufacturer in the world, and its company has branches in Beijing, Fuqing, Wuhan, Ningbo and Suzhou.
TPV is the abbreviation of thermoplastic vulcanized rubber, and its Chinese name is thermoplastic EPDM dynamic vulcanized elastomer or thermoplastic EPDM dynamic vulcanized rubber. It is a polymer elastomer material, which is composed of highly vulcanized EPDM particles dispersed in a continuous polypropylene PP phase. The physical properties and functions of TPV at room temperature are similar to those of thermosetting rubber, and it shows thermoplastic characteristics at high temperature, so it can be processed and molded quickly, economically and conveniently. TPV thermoplastic EPDM dynamically vulcanized elastomer/rubber dynamically vulcanized the vulcanized rubber material, so that EPDM EPDM was dispersed in polypropylene PP plastic matrix with particles smaller than 2 microns, which combined the characteristics of rubber and plastic well and obtained high-performance elastomer materials with excellent comprehensive properties.
Main properties of TPV thermoplastic EPDM dynamically vulcanized elastomer/rubber;
1 and TPV can be used in the temperature range of -60℃ ~ 135℃, with a wide application temperature range;
2. The hardness of 2.TPV varies from 25a to 65d, which can meet a wide range of hardness requirements;
3.TPV has good weather resistance, excellent aging resistance, ozone resistance and ultraviolet resistance;
4. When using TPV, vulcanization is not needed, and it can be directly processed and molded by injection, extrusion, calendering, blow molding and other methods. Can shorten the processing process and reduce the processing cost;
5. The environmental resistance of 5.TPV is similar to that of EPDM, and the oil resistance and solvent resistance are similar to that of chloroprene rubber;
6.TPV is easy to weld, reusable, environmentally friendly and non-toxic.
Main characteristics of TPV thermoplastic EPDM dynamically vulcanized elastomer/rubber;
1, excellent aging resistance, good weather resistance and heat resistance;
2. Excellent permanent deformation resistance;
3. Excellent tensile strength, high toughness and high resilience;
4. Excellent environmental protection performance and reusability;
5. Excellent electrical insulation performance;
6. Wide hardness range;
7. Wide temperature range;
8, color diversification, fully transparent, translucent, light series, easy to color, easy to process and shape;
9. It can be injected or extruded with PP, PA, PC, ABS, PS, PBT, PET and other materials.
Application fields of TPV thermoplastic EPDM dynamically vulcanized elastomer/rubber;
■ Automobile industry
1, automobile sealing strip and seal series;
2, automobile dust cover, fender, ventilation pipe, buffer, bellows, intake pipe, etc. ;
3. Automobile high-voltage ignition wire. It can withstand 30-40KV voltage and meet the flame retardant requirements of UL94 V0;
■ Consumer goods
1, hand tools, electric tools, lawn mowers and other gardening equipment parts;
2. Washers and parts used in household appliances;
3, scissors, toothbrushes, fishing rods, sports equipment, kitchen supplies and other products handle grip;
4, cosmetics, beverages, food, bathroom supplies, medical equipment and other products packaging;
5. Software of various joints such as wheels, buzzers, pipe fittings and belts.
6. Soft plastic parts such as needle plugs, bottle stoppers, straws and sleeves;
7. Flashlight shell, children's toys, toy tires, golf bags, various grips, etc.
■ Electronic equipment
1, various earphone cable sheaths and earphone cable connectors;
2, mine cable, numerical control coaxial cable, ordinary and high-grade wire and cable insulation layer and sheath;
3. Power sockets, plugs and sheaths;
4. Battery, wireless phone shell and electronic transformer shell sheath;
5, ships, mines, drilling platforms, nuclear power plants and other facilities of power cable insulation and sheath.
■ Transportation equipment
1, expansion joints of roads and bridges;
2, road safety facilities, buffer anti-collision components;
3. Container sealing strip.
■ Building materials
1, sealing strip for power components
2. Building expansion joints and sealing strips
3, water supply and drainage pipeline seals, water irrigation system control valve, etc.
See below for details: new material information.
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