Polyurethane finishes powder coatings

In a typical operation, PVC powder compound is metered into a form that has been machined to a high finish to represent the desired part surface, then heated to a temp-eramre at which the compound will sinter and partly fuse, while sufficient rotation is applied to obtain a uniform coating of the inside of the form. The latter may be, in fact, the same form previously used to rotomold PVC plastisol. The polyurethane (PUR) component may be foamed within the form or, more often, prepared previously, placed in the form, and fusion of the PVC, with resultant high PUR adhesion, then completed. ... 

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