塑胶设计指南

J第一章塑腰材料加工方式的逗捧I

塑Of羟品之好璨舆材料逗撵及加工方式之迥巽而有趣大之信册系。封於任何欲裂之塑品，其步骤卷先决定何槿材料能筑J逵到其所须

之物性，再来刖悬逗撵最遹切舆最^湃的加工方式，最彳爰刖视崖量之多寡而泱定^^。

1-1塑月蓼材料之逗撵

在大余勺探制了塑醪材料的基本物性，以下符做更深入的分析。下面所列之各表乃是依1®檄型方法装成^片所测得之8«®，舆祭生崖

所裂出的成品性^仍有相常大之差距，但做卷不同等级材料性^之比较已足矣。下表1-1悬一般常见塑料檄械性^之比较。

赛1.1常甩而外之,M娃IV比快

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表1・2即J卷塑料拉伸强度之靶凰，表1・3卷抗衡擎强度之J5BI。

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表1-4及表1-5，刖悬塑料之其他性^。参考以上各表,即大名勺可知塑品用何槿材料可逢到其用途之所须性^要求。

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一般而言加了玻^彳爰，可增加拉伸力、:咸少拉伸量'抗磨耗力降低'挠曲力增高、熟燮形滥I度增加、热膨胀降低及较不透明，而耐衡

擎力即不一定。但是硬度（除非高填充）、甯氯性­抗化^性及抗天候性即甚辗影簪。

表1-6刖悬一般材料之械械性^之定性超势表。

若是依各槿用途来分，所使用之塑料大概可列表如1・7所示。

表1七

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