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塑料件热塑性选择本文希望能帮助在一个适当的聚合物 选择为您的应用程序。首先要记住的是:聚合物的选择取决于所需的性能 。由于聚合物的需求不断增加,性能 聚合物已被大量修改,以符合各种 客户。值得庆幸的是我们现在有许多聚合物 选项选择,但现在所有的选项选择合适的塑料可 挑战。在本文中,我们将展示如何使用简单的逻辑判断,设计师 可以选择最适合这份工作的聚合物。
塑料可分为两大类:热塑性塑料和热固性塑料,热塑性聚合物形成的 是应用热是可以改造的 。热固性聚合物形成化学、辐射或 热是不可逆的。本文的重点将向 热塑性塑料。下面的表格展示了市场上的热塑性 样本选择。
聚合物颗粒可以混合在一起创造出理想的 性能特点。单相混合是在组件 溶于对方像盐和水。 Amorphous polymers have less shrinkage and warpage as compared to the semi-crystalline. Semi-crystalline material has a higher shrink and greater warpage due to monomer chains packing tightly together to form crystalline regions, more crystalline regions results in greater shrinkage. Semi-crystalline has higher energy regions due to the crystalline packing and therefore has a higher chemical/abrasion resistance. Amorphous polymers can be used in a transparent optical application because monomer chains are not as tightly packed and therefore allow light to pass through. Semi-crystalline is packed tightly and will reflect light off within the crystalline regions. For processing, the amorphous has a wide temperature range that the material will flow and semi-crystalline has a sharp. Semi-crystalline polymers are able to flow better into small/thin-wall sections. 上一篇分类和原型注塑模具的组成下一篇塑料模具的一部分 |