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新款TPE医用化合物可与HDPE形成坚固的粘合 - China Medical Device Manufacturer
CMDM

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Wed, January 17th, 2018

2009年12月CMDM电子快讯 » 行业新闻
新款TPE医用化合物可与HDPE形成坚固的粘合

Teknor Apex (www.teknorapex.com)公司热塑料弹性体部推出了一种热塑料弹性体(TPE)化合物,当它包覆于高强度聚乙烯(HDPE)基材之上时,其粘合强度是标准TPE的两倍。公司将采用相关技术生产定制的Medalist系列医用弹性体TPE化合物。

高级市场经理Nick Sandland表示:“器械制造商正越来越多地借助多色注塑成形免去装配过程,现有的TPE在包覆于HDPE基材之上时,其粘合力有限。Teknor Apex公司采用新型配制技术实现了化合物TPE的定制,它可以提供更强的HDP粘合作用,且粘合强度的差异较小,由此可以生产出稳定性更佳的产品。”



Teknor Apex采用普通的180剥离强度测试,将包覆有HDPE-粘合Medalist TPE的 HDPE样品与一种标准的氢化苯乙烯嵌段共聚物(HSBC) TPE进行比较。Medalist TPE的粘合力或剥离强度中间值是HSBC的两倍:42.086磅/(线)英寸对21.412磅/(线)英寸。此外,Medalist在不同测试样品之间的剥离强度差异仅为HSBC的一半(参见附图)。

Sandland说道:“HSBC的失效形式为粘合失效,即失效发生在TPE和HDPE的交界面。而Medalist TPE的失效形式为内聚失效——在与HDPE粘合失效前TPE自身裂开。”附带的照片显示了Medalist/HDPE样品的剥离测试过程中出现的内聚失效。



Teknor Apex公司称,尽管与HDPE的高强度粘合是医用TPE具备的新性质,但该项技术其实来源于该公司长期应用于饮料瓶TPE封口片的一项技术。FDA监管的应用领域包括将TPE与坚硬的螺旋帽(通常采用HDPE注塑)的内侧相粘合。


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