PBT takes on costlier ETPs


Improved low-temperature impact strength, hydrolysis resistance and high flowability are among the properties of new resin grades developed by two Japanese suppliers with the aim of taking on the more exotic and costly alternatives polyphenylene sulfide (PPS) and liquid crystal polymer (LCP).

Polyplastics and its joint venture WinTech Polymer (both Tokyo) are behind the development of the Duranex LT and SF Series resins. Polyplastics is also a supplier of PPS and LCP.
Targeting PPS substitution, the LT Series boasts improved low temperature impact strength said to be 20 times that of conventional PBT while hydrolysis resistance has been improved by a factor of six. This series targets applications in demanding environments such as automobile sensors and electronic control units (ECUs).
For its part, the SF series possesses a flowability that is more than twice that of standard PBT which approaches that of LCP and makes it ideal for thin-wall electronic components, multi-cavity molding and achieving cycle time savings. Wall thickness of less than 0.2 mm is reportedly achievable.-mpweditorial@ubm.com.