Polyurethane film handily outperforms many other common polymers when it comes to abrasion resistance. Five times more resistant than natural rubber, the material is of choice of wear products.
聚氨酯薄膜的耐磨性胜过许多其他常见的聚合物。较天然橡胶耐磨五倍以上，是耐磨制品的首选材料之一。
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Pump cover material with steel ZG230-450 more, can also be used ductile iron, the latter two materials contrast of wearresistance and hardness and heat resistance to be because the former.
This structure forms the passivation layer against corrosion and wear. The optimum layer against wear improves the resistance of material surface in corrosion, wear and fatigue extremely.