The ultra-high molecular weight polyethylene coal bunker liner performance characteristics: high self-lubricating, non-absorbent undermine the formation of molecular chains due to water absorption to eliminate bonding, cutting natural and smooth. 2. Use of low cost investment, lifelong eliminates the worry of maintenance. 3, high wear resistance, impact resistance by adding a variety improver to improve various characteristics on the basis of maintaining the original characteristics of the more usability. 4 long life for longer life 2 times more than the original polymer materials.