What is material and the properties of castor?

Universal wheel, adjust the foot manufacturers casters what are the materials of their respective characteristics and how? Beijing KNT Chester technology co. , LTD. With more material is as follows: PP, PP chemical name: polypropylene, its features are: environmental protection, heat resistant, oil resistant, acid-proof, alkali resistance, avirulent insipidity. TPR: high bearing, high rebound, no noise, in use process temperature resistant performance is good, in - are allowed 50 to 115 degrees of environment; PA: PA, also known as the nylon material, features are: to adapt to the wide temperature range and can be in - 40℃- Using 100 ℃ scope, nylon material its light weight, convenient to carry also wear-resisting; TPU: TPU polyurethane is short for the English name, its characteristic is: wear-resisting, oil resistant, water resistant, good elasticity, high load bearing, on the surface of small friction coefficient, low noise coefficient in use process; ABS: with a tough, hard, just good mechanics of phase equilibrium and very resistant to chemical erosion resistance, surface gloss, resistance to low temperature and so on characteristics of POM: crystalline plastics, its characteristic is excellent abrasion resistance, impact resistance, heat resistance, and so on performance.