Excellent performance of crane outrigger bearing leg pads
Crane outrigger bearing leg pads performance
UHMWPE’s extremely high molecular weight (the molecular weight of HDPE is usually only 20,000 to 300,000) gives it excellent performance, and it is a moderately priced, excellent performance thermoplastic engineering plastic, it almost concentrates the advantages of various plastics, with ordinary polyethylene and Other engineering plastics have unparalleled comprehensive properties such as wear resistance, impact resistance, self-lubricating, corrosion resistance, impact energy absorption, low temperature resistance, sanitary and non-toxic, not easy to adhere, not easy to absorb water, and low density.
Abrasion resistance of crane outrigger bearing leg pads
The wear resistance of UHMWPE ranks first among plastics and exceeds certain metals. Compared with other engineering plastics, UHMWPE’s mortar abrasion index is only 1/5 of PA66 and 1/7 of carbon steel compared with metal. 1/27 of copper. Such high abrasion resistance makes it difficult to test the degree of abrasion resistance by the general plastic abrasion test method, so a mortar abrasion test device is specially designed. The wear resistance of UHMWPE is directly proportional to the molecular weight. The higher the molecular weight, the better the wear resistance.
Impact resistance of crane outrigger bearing leg pads
The impact strength of UHMWPE sheet is among the best among all engineering plastics. The impact strength of UHMWPE is about twice that of impact-resistant PC, 5 times that of ABS, and more than 10 times that of POM and PBTP. The impact resistance is so high that it is difficult to break it using the usual impact test method. Its impact strength increases with the increase of molecular weight, reaches the value when the molecular weight is 1.5 million, and then gradually decreases as the molecular weight continues to increase. It is worth pointing out that it can also maintain excellent impact strength in liquid nitrogen (-195°C), a feature that other plastics do not have. In addition, it has a higher surface hardness after repeated impacts.