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                                • 不要把常用塑料的介紹當成傻瓜

                                  塑料可以是純樹脂或添加各種添加劑的混合物。樹脂起粘合劑的作用。添加劑的目的是改善純樹脂的物理和機械性能,改善加工性能或節約樹脂。因而,塑膠最基礎的物理學特性是由環氧樹脂的特性所決策的。環氧樹脂膠分成天然樹脂和人造環氧樹脂膠,兩者又稱合成樹脂

                                  2019-07-04
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