Rubber and plastic seals is an important basic component of mechanical products, its manufacturing precision requirements are high, with China's automobile manufacturing and automobile ownership of the rapid growth of sealing products, whether in the structure or materials need to be supported by high-precision technology and equipment. In recent years, China's seals in the professional production of some enterprises in line with the market positioning, timely adjustment of industrial structure and product structure, rapid development and growth. In the rapid increase in production value of production at the same time, in the production and testing of experimental equipment also made a greater investment.

Rubber and plastic sealing materials development trends

Rubber and plastic seals commonly used nitrile, hydrogenated nitrile, fluoroelastomer, acrylate rubber, PTFE and other special rubber and plastic material formulations and processing technology research to improve the performance of the material is still the focus of the work of performance and utilization. The application of nanomaterials will enhance the mechanical properties of rubber and plastic materials and special features. April 1 this year, the National Standardization Committee promulgated the implementation of China's first four nanomaterials in the national standard, there is a rubber "nano zinc oxide" standard.

Special engineering elastomers instead of low performance oil-resistant rubber; rubber bright surface treatment; through nanotechnology modification of rubber and plastic materials and the application of liquid rubber materials, have made some progress in recent years. In particular, the recent application of some new materials, rubber and plastic sealing technology has played a great role in promoting.

China's relatively weak application of thermoplastic elastomers in seals (TPE) with the physical properties of vulcanized rubber and thermoplastic resin process performance, the molding process does not require vulcanization, and thus was used as the third generation of rubber. The main varieties of TPO, TPV, TPU has been widely used in the world: TPV in the automotive application of an average annual growth of 15%, generally EPDN and PP full crosslinking compounds, which combines high tensile strength, oil and heat resistance, and other properties, can be a long time to resist the 150 ℃ hot oil conditions, can be used to replace the EPDM production of automotive seals and other products; TPO is currently used more than the ternary TPO is currently used more EPDM and polyethylene components, the production process has a mechanical blending method and dynamic vulcanization method. Dynamic vulcanization method for the production of TPO. Rubber components up to 60 ~ 70%, abrasion resistance, ozone resistance, high tear strength, compression deformation is small, the overall performance is better than EPDM vulcanized rubber.

The United States, Western Europe and Asia are continuing to build additional TPO production units; TPU both plastic and excellent processing properties and physical properties of rubber, its wear resistance, low temperature resistance, excellent radiation resistance, in the automotive, aerospace, medical and health care, household goods, military supplies and other industrial applications have made great progress, TPU can be widely used in automotive shock absorbing pads, bushings, bushes, airbags and other parts.

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