Introduction of TPV materials
TPV thermoplastic vulcanized rubber (English Thermoplastic Vulcanizate), polyolefin alloy thermoplastic elastomer, referred to as TPV, thermoplastic vulcanized rubber, referred to as thermoplastic rubber (English Thermoplastic Rubber), referred to as TPR, but this name is easy to compare with other types of thermoplastic elastomer (English for Thermoplastic Elastomer) is confused, because thermoplastic elastomers are often called thermoplastic rubber, especially styrenic elastomers. At least in China, it seems that "TPR" has become its proprietary name. It refers to a thermoplastic elastomer based on styrene elastomers such as SBS and SEBS, which is inseparable from the consumption of styrene elastomers in the fields of consumer and end consumer goods.
TPV can be formed between many plastics and rubber, but only individual blends have practical value after dynamic vulcanization. Commercially available PP/PE/EPDM, PP/NBR, PP/ACM, PS/SEBS
1. Good elasticity and compression set resistance, environmental resistance and aging resistance are equivalent to EPDM rubber, and its oil and solvent resistance is comparable to general-purpose neoprene.
2, the application temperature range is wide (– 60-150 ° C), soft hardness application range (25A-54D), the advantages of easy dyeing greatly improve the freedom of product design.
3, excellent processing performance: can be processed by injection molding, extrusion and other thermoplastic processing methods, efficient, simple and easy, no need to add equipment, high fluidity, small shrinkage.
4, green, environmentally friendly, recyclable, and repeated use of six times without significant decline in performance, in line with EU environmental requirements.
5, light weight (0.90-0.97), uniform appearance quality, high surface grade, good feel.
Based on the above performance characteristics, TPV has a certain comprehensive performance and comprehensive cost compared with traditional rubber materials, other TPE elastomers (including TPR\SBS, SEBS, TPU, etc.) or PVC and other plastic materials in a wide range of applications. The alternative advantages provide a new choice for product companies in product innovation, value-added products and competitiveness.
The main manufacturers of TPV:
Santoprene thermoplastic in USA
a. Automotive industry
1. Car seals and seals series;
2. Automobile dust cover, fender, ventilation pipe, buffer, bellows, intake pipe, etc.;
3, car high voltage ignition line. Can withstand 30-40KV voltage, can meet UL94 V0 flame retardant requirements;
b. Consumer goods
1. Parts of gardening equipment such as hand tools, power tools, and weeding machines;
2. Gaskets and parts used on household appliances;
3, handle grips of scissors, toothbrushes, fishing rods, sports equipment, kitchen supplies, etc.;
4. All kinds of packaging for cosmetics, beverages, food, toiletries, medical appliances, etc.;
5, soft parts of various wheels, buzzers, pipe fittings, belts and other joints.
6, soft plugs such as needle plugs, stoppers, straws, sleeves;
7, flashlight shell, children's toys, toy tires, golf bags, all kinds of grips.
c. Electronic appliances
1, a variety of headphone cable sheath, headphone cable connector;
2. Mine cable, CNC coaxial cable, common and high-grade wire and cable insulation and sheath;
3, power outlets, plugs and jackets;
4. Battery, radiotelephone housing and electronic transformer housing sheath;
5. Insulation and sheathing of power cables for ships, mines, drilling platforms, nuclear power plants and other facilities.
d. Traffic equipment
1. Road and bridge expansion joints;
2. Road safety facilities and buffer anti-collision parts;
3. Container sealing strips.
e. Building materials
1. Power component sealing strip
2, building expansion joints, sealing strips
3. Water supply and drainage pipe seals, water irrigation system control valves, etc.
TPV has a slight hygroscopic property and should be replenished dry, especially before extrusion or blow molding. The temperature of the dryer should be raised to 100 °C before placing the material in the dry box. The TPV was then held in a dry box for 2-3 hours. Avoid contact with high relative humidity environments as the material will absorb moisture and create voids in the processed product. If the equipment remains in the extruder barrel after a long period of downtime, the material remaining in the extruder barrel should be discharged. The extrusion equipment should be thoroughly cleaned before and after processing the TPV. The injection molding equipment or extruder barrel should be mechanically cleaned or completely replaced with polyethylene or polypropylene.
TPV injection molding process:
The melt viscosity of TPV is larger than many common thermoplastic materials. When processing, it requires large injection nozzles, injection ports, runners and gates. It also requires high injection pressure and faster injection rate. To increase the filling speed and reduce the flash, and then have a short holding time at a higher pressure to make it enough to freeze the gate. The speed of the injection screw should be 100 to 200 rpm and the back pressure should be as low as possible without mixing.
Asia Billion as a professional custom plastic injection molding manufacture in China which mainly service for aboard customers, we do a lot of TPV and TPE plastic injection molding project. if you need a good partner for your plastic tooling and molding project, please contact us freely at:
Asia Billion Innovational Technology Ltd
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