Phenolic prepregs for aircraft interiors

Lewcott Corp. has developed a line of new phenolic prepreg products and adhesives targeted toward aircraft interior applications and manufacturing processes.

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To its LC family of phenolic prepreg, formulated to meet or exceed flame/smoke/toxicity (FST) requirements in composite aircraft interior components, Lewcott Corp. (Millbury, Mass.) has added LC196 glass-fabric prepreg, a snap-cure system that is self-adhesive to aramid/phenolic and aluminum honeycomb core. The prepreg offers flexural strength of 90,000 psi, flexural modulus of 3.2 million psi, tensile strength of 73,000 psi and compressive strength of 70,00 psi, plus peel strength (climbing drum) of 12 lb to 16 lb per inch of width. Also in the LC family: LC193, a low-cost, general-purpose system designed for interior parts that require flame resistance but not high peel strength; LC194, designed to combine optimum adhesion to aramid honeycomb and aircraft-interior-grade flammability properties; LC194, reportedly the most cost-effective self-adhesive prepreg for use with aramid/phenolic honeycomb; LC194M, a self-extinguishing system; and LC195, a self-extinguishing prepreg developed for adhesion to aramid/phenolic honeycomb in a 10-minute hot-press cure cycle. According to the company, all its phenolic prepreg grades have been tested and qualified against Federal Aviation Regulation (FAR) 25.853, ASTM E662-96 and several MIL and customer-specific specifications.

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