| 摘要 |
A durable polyoxymethylene composition and a ramp made of the durable polyoxymethylene composition has at least one of the micro-wear loss of less than 1 µm maximum wear depth and of less than 10 µm 2 wear area under a condition of a load of 2.5 g after being reciprocated 600,000 times at a speed of 8 inch/sec and an environmental humidity of 13% to 17%RH) and an environmental temperature of 3°C to 10°C, and has at least one of the micro-wear loss of less than 0.5µm maximum wear depth and of less than 5µm 2 wear area under a condition of a load of 2.5 g after being reciprocated 600, 000 times at a speed of 8 inch/sec and an environmental humidity of 50%-60%RH and an environmental temperature of 22°C to 60°C.
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