UL電子線，塑料的特征與使用

UL電子線，塑料的特征與使用詳細描述：


UL電子線的塑料具有彈性，有些塑料也像組成纖維一樣，具有必然的彈性。當它遭到外力拉伸時，彎曲的分子就由柔韌性而被拉直，但一旦拉力報廢后，它又會恢恢復來的彎曲形態，多么就使得塑料具有彈性，例如聚乙烯和聚氯乙烯的薄膜成品。但是有些塑料是沒有彈性的，塑料具有較高的強度：塑料雖然沒有金屬那樣鞏固，但與陶瓷、玻璃、木材等比較，照樣具有比較高的強度及耐磨性。塑料能夠制成機械上安定的齒輪和軸承。

UL電子線塑料具有可塑性，所謂塑料的可塑性就是能夠經由加熱的辦法使固體的塑料變軟，然后再把變軟了的塑料放在模具中，讓它冷卻后又從新凝結成必然外形的固體。塑料的這種性質也有必然的缺點，即遇熱時容易軟化變形，有的塑料以致用溫度較高的水燙一下就會變形，所以塑料成品通俗不宜接觸開水。

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