Catalyzed resin mixtures are sprayed, brushed, or spatulated on a mold. A precut reinforcing layer is laid on the wet resin. After the resin soaks into the reinforcement, subsequent layers are built up to the required thickness and are cured, removed from the mold and trimmed. Some variations of hand layup techniques are bag molding, drape molding, vacuum molding and spray-up molding.
Typical parts are radomes, custom auto bodies, boat hulls, and jigs and fixtures.
A substance or mixture added to a plastic composition to promote or control the curing action by taking part in it. Mohs hardness, Rockwell hardness, and Shore hardness. Index harness satin Weaving pattern producing a satin appearance. The rise in temperature in a part resulting from the dissipation of applied strain energy as heat or from applied mold cure heat. See also hysteresis.