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1/13/2010

PET-based structural core material

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Alcan Composites has released a “renewed” AIREX T90 polyethylene terephthalate (PET)-based structural core material.

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Alcan Composites (Sins, Switzerland) has released a “renewed” AIREX T90 polyethylene terephthalate (PET)-based structural core material. Introduced in 2005 for applications with high flame, smoke and toxicity (FST) requirements, the recently reformulated core material now reportedly exhibits enhanced mechanical properties: Its damage tolerance has been raised from 2.5 percent to 10 percent, and its shear strength has been increased by more than 30 percent. Other features include high-temperature performance, good fatigue resistance, compatibility with all common resins, and recyclability. Highly chemical resistant, the new formula is unaffected by highly styrenated thermoset resins. Moreover, after-expansion and outgassing are not issues. Also, the high thermal stability of the PET foam allows its use with prepregs up to 150°C/302°F. In addition, when it is used as a core in thermoplastic composites, the foam’s favorable viscoelastic and thermoplastic behavior permits it to be thermoformed, and its closed cell structure and physical properties prevent moisture ingress. The core already has been certifi ed according to relevant FST standards, including NF, DIN and FAR. Tests have demonstrated that it also complies with CEN TS 45’545, given the appropriate sandwich design.  

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