Method of applying low gloss nylon coatings

Details Method of applying low gloss nylon coatings Method of applying low gloss nylon coatings

1987-10-05

1988-09-20

Goldberg, Howard N.

Metal working

Method of mechanical manufacture

Combined manufacture including applying or shaping of fluent...

29 33D, 427 27, 427 29, 427 32, B23P 2300

Patent

active

047715235

ABSTRACT:
A method for making endless lengths of nylon coated metal tubing which coating has high mechanical strength characteristics and a low gloss surface finish. The method includes passing the formed tubing through a first powder coating region and applying a layer of nylon generally uniformly surrounding the circumference of the tubing. This first nylon powder coating is heated sufficiently to cause the nylon coating to achieve complete melt-flow into a continuous first nylon coating region which would have a relatively high gloss. The coated tubing is next passed through a second powder coating region with the surface temperature of the first coating still above the melting temperature of the nylon. At this second coating region a second powder coating of the same type of nylon is applied. The second coating is cooled below the melting point of the nylon before the second coating completely melts leaving the outer surface with a very low gloss surface finish.

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