Fabricating any polyurethane material—whether flexible, rigid, cast or CASE (Coatings, Adhesives, Sealants and Elastomers)—requires equipment to store, meter, heat, mix and dispense the chemicals (typically a polyol or polyether, and an isocyanate or diisocyanate).

Chemical storage can vary from 55-gallon drums to large bulk storage tank farms. In many applications, the chemicals are transferred to a day tank where they may be pressurized. In other applications, the chemicals are heated either in the tanks and/or through temperature conditioning units.

The chemical components are blended in a mixing head, resulting in a chemical reaction that produces polyurethane. Depending upon the particular application, the mixing head can vary from a high- or low-pressure mix head to a spray head. The several types of mixing-head equipment are described below.

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