PP/PA/PC/TPE/无卤阻燃剂/PET/涤纶/锦纶/尼龙纺丝阻燃剂

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24 2019-07

低烟无卤电缆挤出工艺的探讨

随着电缆材料阻燃技术的发展，新型的阻燃电缆也不断产生，从原来普通的阻燃电缆发展到叁睿合信低烟低卤阻燃电缆和低烟无卤阻燃电缆。这说明近年对阻燃电缆的要求越来越高。在欧美日等国，环保型电线电缆已成为所有电缆品种的主流产品，政府严禁使用或进口非环保型电缆。
18 2019-07

阻燃改性为什么那么复杂？

第一，燃烧过程复杂燃烧有三个条件：可燃物，助燃物，达到着火点。由于可燃物具有多种相态（气态，液态，固态，液态有不同蒸气压，固态有紧密和疏松之分），助燃剂存在浓度与扩散，着火点存在高低，所以，燃烧过程很复杂。这里涉及到明燃和阴燃。
17 2019-07

插线板用高抗冲阻燃耐热PET/PC合金的制备

聚碳酸酯(PC)是五大通用工程塑料之一，用量仅次于聚酰胺。PC耐冲击强度高、抗蠕变性好，热变形温度高、尺寸稳定性优异，被广泛应用于汽车、电子电器、机械等领域。但是由于PC主链上含有苯环，链刚性较大，造成其熔体黏度高、流动性差。用纯PC树脂注塑制品时，材料的内应力无法得到充分的释放，制品容易开裂，且PC材料对应力敏感，成型过程中的助剂、色粉等杂质都会显著降低PC材料的冲击强度，所以一般将PC与其它材料共混制成合金来解决上述问题。聚对苯二甲酸乙二酯(PET)是一种性能优良的工程塑料，耐热性好，具有一定的结晶能力，耐溶剂性好，但是PET分子链刚性较大，结晶温度高，结晶速率慢，这对注塑成型造成困难。一般PET材料用作纤维纺丝以及包装材料使用。但是PET的成本相比于PC以及聚对苯二甲酸丁二酯(PBT)较低，所以PET和PC树脂制备成的合金不仅力学性能、耐溶性，加工性优异而且成本方面具有很大的优势。PC是无定形塑料，而PET是结晶性塑料，一般来说结晶–非晶体系的相容性较差，但是二者同属于聚酯，在加工过程中会发生一定的酯交换反应，生成无规共聚物，可提高两者的相容性，此外还可以通过加入不同的增容剂来改善二者的相容性。
15 2019-07

几种典型阻燃剂的特点及进展

几种典型阻燃剂的特点及进展膨胀型阻燃剂中磷氮元素含量较高,在燃烧过程中能形成致密的泡沫炭层,从而起到隔热、抑氧和防熔滴作用。阻燃剂的阻燃性能优异,IFR燃烧时不产生卤化氢气体,属于环保型阻燃剂。膨胀型阻燃剂有三部分组成,分别是成炭剂(炭源)、脱水剂(酸源)和发泡剂(气源)
28 2019-05

无卤阻燃尼龙

中国老百姓最早认识尼龙，还是在上世纪60年代。记得那时从国外进口尿素的包装袋是尼龙袋，老百姓视为宝贝，不仅可以用来装东西，还可用以做衣服的材料。如果谁有一件尼龙衬衣，则是令人羡慕的事情。后来，随着我国尼龙工业的发展，尼龙走进了寻常百姓家。如今尼龙家族十分庞大，品种数不胜数，用途也越来越广泛。
27 2019-05

聚丙烯（PP）常见的注塑成形缺陷！

一、欠注故障分析及排除方法： (1)工艺条件控制不当。应适当调整。 (2)注塑机的注射能力小于塑件重量。应换用较大规格的注塑机。 (3)流道和浇口截面太小。应适当加大。 (4)模腔内熔料的流动距离太长或有薄壁部分。应设置冷料穴。 (5)模具排气不良，模腔内的残留空气导致欠注。应改善模具的排气系统。 (6)原料的流动性能太差。应换用流动性能较好的树脂。 (7)料筒温度太低，注射压力不足或补料的注射时间太短也会引起欠注。应相应提高有关工艺参数的控制量。

基本文件流程错误 SQL 调试

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0.0689s

低烟无卤电缆挤出工艺的探讨

阻燃改性为什么那么复杂？

插线板用高抗冲阻燃耐热PET/PC合金的制备

几种典型阻燃剂的特点及进展

无卤阻燃尼龙

聚丙烯（PP）常见的注塑成形缺陷！