Seals use TPU material performance requirements

Analysis the seals with TPU material performance requirements: seals with TPU material must have excellent flexibility, TPU material property list, the most direct data reflect the elastic compression permanent deformation. Only compression deformation resistance is very good, TPU seals to disappear in the high-pressure compressed, pressure, can well restore the original size. Otherwise, compressed, not fully recovered, after several times, TPU oil seal will deformation. Seal with TPU material must have excellent hydrolysis resistance performance. Is the so-called hydrolysis, polyurethane material under high temperature and high pressure in contact with the water degradation. Due to seal working under high temperature, if there are any wet or contact with water, air or hydraulic oil decomposition with the presence of a small amount of oleic acid and water, and seal it will appear the phenomenon of hydrolysis, main show is cracking, loss of strength, easy to wear, the symptom such as sticky, these cases material hydrolysis resistance is not pass. Seal with TPU material must have a good oil resistance. Polyurethane seal due to the work under the hydraulic oil, must choose to hydraulic oil resistance of TPU material. Or seal will appear swelling, weight gain phenomenon, resulting in reduced life spans. Seals use TPU material must have good wear resistance. Although the TPU is wear-resisting performance thermoplastic elastomer material of all the best, but as a result of TPU itself is a lot of more phyletic, wear-resisting performance is uneven also, so be sure to focus on abrasion resistance, it is also a key to the service life of the seal parameter. Seals use TPU material must have a good low temperature resistance. Because the seal could use in cold ( - 40 ~ - 60℃) Low temperature region, the material of low temperature resistance must be considered.