Polyurethane seals materials development and application of

High-temperature polyurethane material
Modern thermoplastic polyurethane (TPU) security seals operating temperature from -40 ℃ ~ +120 ℃, and strong chemical medium can also be adapted. While also maintaining a high capacity and good wear resistance to extrusion and other basic properties. Even in the case without lubrication, the piston rod seals can be under a pressure of 10MPa 0.05m / s speed reciprocating motion. Through the ISO standard cylinder piston seals long-term tests showed that the life of the seal polyurethane material is the same shape and size of nitrile rubber seal 5 to 6 times.
Polyurethane seal material as in the 20th century in the early 1980s to get a breakthrough. At that time, including a number of companies, including Parker manufacturers develop more hydrolysis resistant polyurethane material, these new polyurethane seal at high pressure and which maintain high flexibility +110 ℃, to achieve a better sealing performance, as well than the original The polyurethane (only resistant to high temperature +80 ℃) longer working life. This achievement opens the door to mobile hydraulic applications, whereas before designers in the industry do not trust very original polyurethane material seals. 1989, P5008 materials obtained using an approved Caterpillar plants worldwide, this recognition marks the Parker trailer seals Polyurethane materials application in earthmoving equipment to achieve a breakthrough. Thermoplastic polyurethane (TPU) Seal System application in the excavator soon largely replaced by 5 to 7 V-ring rubber cloth portfolio structure. Ten years ago this success, making further expanded its investment in the development of new polyurethane material. The new "custom-made" thermoplastic polyurethane material varieties, shapes and seals more more economical production expanded range of potential applications.