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What is Reaction Injection Molding (RIM Molding)? Benefits of Reaction Injection Molding (RIM Molding) Reaction Injection Molding (RIM Molding) vs. Thermoplastics Reaction Injection Molding (RIM Molding) vs. Structural Foam Reaction Injection Molding (RIM Molding)vs. Fiberglass Reaction Injection Molding (RIM Molding) vs. Thermoforming Reaction Injection Molding (RIM Molding) vs. Metal Reaction Injection Molding (RIM Molding) Encapsulation Alternative |
Reaction Injection Molding systems are composed of two liquid components that chemically react in a mold to form a plastic material. The liquids, isocyanate and polyol, are commonly referred to as the "A" side and "B" side components. Generally, the "B" component contains additives, such as stabilizers, flow modifiers, catalysts, combustion modifiers, blowing agents, filler, pigments, and release agents to modify physical characteristics of the final part. When the "A" and "B" components combine, the isocyanate reacts with the hydroxyl in the polyol to form a thermosetting polyurethane polymer. This reaction is exothermic: when the "A" and "B" components combine, heat is generated. Cooling lines on the mold help dissipate this heat.
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