注塑模具-塑料制品热变形温度

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1、衡量塑料制品耐热性能好坏的指标有热变形温度马丁耐热温度和维卡软化点三种,其中以热变形温度最为常用.                   常用塑料的耐热性能(未经改性的)                                 热变形温度----------维卡软化点------------马丁耐热HDPE-----------------80-------------------------120------------------------LDPE-------------------50------------------

2、--------95--------------------------EVA-------------------------------------------------64-------------------------PP........................102........................110........................PS........................85............................105..............

3、.......PMMA...................100..........................120......................PTFE.....................260..........................110.......................ABS.......................86...........................160......................75PSF....................

4、...185..........................180.....................150POM.......................98............................141.....................55PC.........................134.............................153...................112PA6.......................58...................

5、...........180....................48PA66......................60..............................217...................50PA1010..................55..............................159.....................44PET........................70..........................................

6、............80PBT........................66..............................177....................49PPS........................240.....................................................102PPO.......................172......................................................110

7、PI...........................360...........................300.....................LCP........................315.......................................................大家一定对上面的温度觉得奇怪,怎么PAPBT料的热变形温度那么低呢?其实PAPBT如果不进行耐热改性,其耐热性能是很差的.下面具体介绍一些塑料经耐热改性后的耐热性能对比例子.一.塑料的填充耐热改性:在所

8、有填料中,除有机料外,大部分无机矿物填料  都可明显提高塑料的耐热温度.常用的耐热填料有:碳酸钙滑石粉硅灰石  云母锻烧陶土铝矾土及石棉等.且填料的粒度越小,改性效果越好.  a.纳米级填料: