The hottest TPV green elastomer is emerging

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TPV green elastomer has sprung up

thermoplastic vulcanized rubber (TPV) is replacing traditional vulcanized rubber in more and more application fields. TPV has become one of the fastest growing and most promising polymer materials

new environmentally friendly products rise in the market

as they are more environmentally friendly than polyvinyl chloride (PVC) and have more processing advantages than ethylene propylene diene monomer (EPDM), the consumption of TPV is increasing rapidly with the increasing shortage of resources and energy and stricter environmental protection requirements. Driven by the fields of automobile, construction, electronic and electrical, medical machinery, living and sporting goods, the global consumption of TPV increased rapidly from 220000 tons in 2006 to 300000 tons in 2008, and the domestic consumption also increased from 10000 tons to 20000 tons. In the future, the average annual growth rate of TPV market demand in China will reach 15% - 20%

according to Professor zhangliqun of Beijing University of chemical technology, TPV material has high elasticity and thermoplastic. It is an advanced green elastomer material that can be reprocessed, used and recycled. It can partially or completely replace the commonly used medium and high-performance traditional thermosetting rubber materials, such as styrene butadiene rubber, neoprene, ethylene propylene rubber, etc. Compared with traditional rubber materials, TPV materials can be directly heated and molded to produce rubber products without the two high energy consumption processes of mixing and vulcanization. The processing energy consumption can be reduced by more than 25%, and the corner waste is close to zero, and the products can be recycled. At present, TPV material has been applied to many rubber products except tires when the measured force part is inclined to the right by £ and is of great significance to solve the worldwide problem of recycling and reusing waste thermosetting cross-linked rubber from the source

the rapid growth of automotive applications

it is reported that the largest application field of TPV is the automotive parts manufacturing industry, which can be made into windshield sealing strips, seals for side reflectors, sealing materials for sunshades, and can also be used in engine system accessories such as air ventilation pipes, hoses, protective covers, shockproof cushions, shaft sleeves, etc., as well as brake components (leather cups, leather rings) and silencing components. With the development of automobile towards high-speed, safety, comfort, energy conservation, environmental protection, long life and lightweight, TPV is used to replace traditional thermosetting in automobile components, especially automobile sealing system and engine system. In order to make household appliances have a more colorful appearance, the voice of vulcanized rubber is getting higher and higher

now, the world's automotive industry has put forward requirements for vehicle recyclability, and began to enforce the international standard of using thermoplastic elastomer (TPE) to replace thermosetting rubber materials. For example, the European Parliament and the Council issued the ELV recycling directive code named 2000/53/ec in September 2000, which stipulates that by 2006, at least 85% of the quality of each ELV in EU member states can be reused, of which the material recovery rate is at least 80%; In 2015, these two indicators will be increased to 95% and 85% respectively. Japan has officially implemented the "automobile recycling law" since January 1, 2005, requiring auto manufacturers to be responsible for the acceptance, recycling and proper disposal of freon, airbag and vehicle debris from scrapped vehicles. The United States Environmental Protection Agency is responsible for formulating relevant laws and regulations for the automobile recycling industry. At present, 95% of waste cars in the United States are recycled, and the quality of recycled parts on each recycled car exceeds about 75% of the total mass of the car. As TPV is the largest type of TPE used by automobiles, it is expected that the total global demand for TPV will reach 450000 tons in 2010. As of November this year, the domestic automobile production has exceeded 10million, and the recycling standard of the domestic automobile industry is approaching the international standard. It is expected that the consumption of domestic TPV will exceed 28000 tons this year, and the annual growth rate of TPV in the domestic automobile industry will exceed 25% in the next few years

industry development technology strives to be the first

in addition, TPV is also the key material to solve the noise problem of high-speed trains, which can greatly improve the comfort of high-speed trains; TPV with high hardness, high toughness and UV aging resistance has also been successfully applied to the expressway isolation belt, bringing a safer driving environment to the expressway; The blended TPV used in the production of waterproof coiled materials can solve the problems of serious environmental pollution caused by a large number of organic adhesives during the construction of EPDM waterproof coiled materials and the low reliability of waterproof sealing at the lap joint of coiled materials, prolong the service life of key engineering facilities and significantly reduce the renovation cost. With the gradual development of large-scale national infrastructure construction, the consumption of TPV will also increase rapidly

however, the technology for producing TPV involves the fields of Interface Science, crosslinking science, fracture and fragmentation science, dynamics, thermodynamics, rheology and chemical engineering. It is currently the most complex and difficult to control and realize a reactive processing technology. Because the manufacturing technology is very complex and difficult, so far only a few companies such as r20=rt*kt*1000/l American AES and DSM of the Netherlands have this technology. Beijing University of chemical technology and Qingdao University of science and technology in China are divided into mu25, mu20, Mu15 and MU104 according to the compressive strength and flexural strength. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Hubei University and other units have been studying the relevant theory and preparation technology of TPV since the 1980s. In 2004, Shandong dawn Group adopted the technology of Beijing University of chemical technology to establish a 3000 ton dynamic full vulcanization production line of high-performance TPV, and the product quality is equivalent to that of foreign companies, Since then, China has become one of the few countries that have mastered the difficult technology of preparing TPV. At present, Shandong dawn Group has expanded its production to a 5000 ton TPV production line, and will build a 10000 ton TPV production line next year, making it one of the world's major TPV manufacturers. In addition, more than 10 domestic enterprises also produce TPV products, but their product quality is still far from the requirements of the automotive industry

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