Plastic Wear: What Causes It and How to Avoid It

Plastic wear, like friction, is a complex phenomenon. It takes place as two surfaces slide or roll against each other and the forces of relative motion gradually remove material.  Two common wear mechanisms are adhesion and abrasion. Adhesive wear occurs when mating surfaces slide against each other and fragments of one surface dislodge and adhere to the other. In a lubricated material, the resulting debris forms a fine powder on the mating surface.Read more

The Pultrusion Process: Manufacturing Fiber Reinforced Polymers

The Pultrusion Process*
Pultrusion is a continuous molding process using fiber reinforcement in polyester or other thermosetting resin matrices.  Pre-selected reinforcement materials, such as fiberglass roving, mat or cloth, are drawn through a resin bath in which all material is thoroughly impregnated with a liquid thermosetting resin.  The wet-out fiber is formed to the desired geometric shape and pulled into a heated steel die. Once inside the die, the resin cure is initiated by controlling precise elevated temperatures.Read more

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