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工程塑料應用聚四氟乙烯耐磨

時間:2023年9月5日 點擊量:320

添加合適的耐磨助劑工程塑料應用聚四氟乙烯
(1)聚四氟乙烯(PTFE)
PTFE的摩擦系數很低,在摩擦過程中PTFE分子會在零件表面形成潤滑薄膜。PTFE在摩擦力下有很好的潤滑性及耐磨性能,在高負荷應用中,PTFE是最佳的耐磨添加劑。這些高負荷應用包括液壓式活塞環封、推力墊圈。PTFE含量在非結晶性塑料中一般為15%、而在結晶性塑料中一般為20%。
(2)聚硅氧烷
聚硅氧烷液體是一種會遷移的耐磨添加劑,當加入熱塑性塑料中,該助劑會緩慢遷移到零件表面,并形成一層持續不斷的薄膜。聚硅氧烷的粘度逾低,其越能快速遷移到零件表面提供耐磨特性,但聚硅氧烷的粘度不能太低,否則容易揮發,并會很快地從零件中消失。
(3)爽滑劑
如油酸酰胺、芥酸酰胺等爽滑劑,當它們被加入到熱塑性塑料中時,會遷移到制件的表面產生一個臘層,在減少摩擦系數同時也降低刮痕的可見度,缺點是不能徹底改善表面發粘現象。
相關搜索:大連工程塑料,大連耐磨塑料,大連PC材料,大連聚四氟乙烯,大連高分子工程塑料,大連尼龍,大連高性能工程塑料

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