尼龙的机械强度高，耐磨性好，是最早被用作轴承的高分子材料之一。尼龙的化学稳定性好，不擦伤对偶件，因而很适宜在存在大量尘土和泥砂的条件下工作。但尼龙的吸水性大，尺寸稳定性差，热传导系数小，热膨胀系数大。尼龙在干摩擦条件下具有较大的摩擦系数。当负荷或摩擦速度 Nylon high mechanical strength, good wear resistance, is one of the earliest used as a polymer bearing materials. Nylon has good chemical stability and does not scratch the mating parts, so it is suitable to work in the presence of a large amount of dust and silt. But the nylon water absorption, poor dimensional stability, small thermal conductivity, thermal expansion coefficient. Nylon has a large coefficient of friction under dry friction conditions. When load or friction speed