Materials CLI works with the following materials: MIL-PRF-25690, MIL-PRF-8184, MIL-PRF-5425 Acrylic, LP-393 Polycarbonate, LP-391 Acrylic, Acrylonitrile Butadience Styrene Plastic (ABS) and Kydex.
Thermoplastic polymers such as acrylic materials are used in
numerous aircraft and rotorcraft applications because
it readily accommodates the manufacture of clear lightweight
complex-shaped transparencies. As-cast
acrylic is typically used for helicopters and non-pressurized
aircraft transparencies.
Stretched acrylic is obtained by stretching as-cast acrylic
sheets, a process which reorientates the long polymer chains. Stretching drastically
increases the material properties. Stretched acrylic offers an improved craze resistance, increased stress tolerance, crack propagation and solvent resistance than as-cast acrylic. It is therefore suitable for birdproof windshields, canopies, outer cabin window panes and other transparencies for pressurized aircraft.
Polycarbonate materials possess exceptional strength and provide
high impact resistance which make it the ideal material for the
design of windshields subjected to high velocity birdstrikes.
It is lightweight and provides excellent high-temperature tolerance.
Susceptible to stress-solvent crazing, it is recommmended that
polycarbonate items be used only with an applied protective coating.
Protective Coatings for acrylic and polycarbonate are
used to prevent deterioration from weather extremes including
ultraviolet rays, solvents and chemicals as well environmental
conditions such as abrasion caused by sand and dirt. Coatings
can be applied by means of flow, dip or spray and are generally
thermally cured.
Several coating systems are available and the choice is dependent
upon the desired performance requirements.
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