Flexible Foams

General Plastics Manufacturing Company offers unique open-celled flexible polyurethane foams with engineered energy absorption properties. These foams allow users to design systems delivering good efficiency while absorbing energy at a consistent, controlled rate. LAST-A-FOAM^® flexible and semi-flexible foams can be used in series or parallel to relieve static stress on flexible shock attenuation material, or to break up resonance or change shock pulse frequencies. Elevated temperatures have little effect on the performance of any of the LAST-A-FOAM^® high density flexible foams with no long term effects up to 160°F and an apprimate 10% reduction of firmness at the higher temperature. Reduced temperatures also has no long term effects, however, the foam can become significantly firmer at subzero temperatures. With the exception of intense UV radiation, LAST-A-FOAM^® high-density foams are long lasting and relatively unharmed by environmental factors.

LAST-A-FOAM^® EF-4000 and TF-5070 series flexible, high-density polyurethane foams are formulated to absorb large amounts of energy while protecting payloads from high g-stress levels. Each of these foams absorb energy over a broad range, exhibiting a flat load-deflection curve.

They have been used extensively as “spring-damper” shock isolation systems protecting missiles in underground silos and submarine launch tubes. Minuteman, Peacekeeper, and Trident programs all have employed these foams. Other applications include shock-isolation systems for earthquake-prone buildings and shock mounts and pads for delicate equipment in shipping containers.

LAST-A-FOAM^® EF-4000 and TF-series foams are available in several densities. LAST-A-FOAM^® EF-4000-series is available in 3 to 7 lbs/cubic foot and LAST-A-FOAM^® TF-5070-series is available in 8.5 to 15 lbs/cubic foot.