Apparatus for coating fibers with thermoplastics

Coating apparatus – Projection or spray type – Applying solid particulate material

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118312, 239 79, 239135, B05B 700, B05C 500, B05C 1900

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active

051349590

ABSTRACT:
A process for forming a thermoplastic resin coating on glass fibers comprises heating a thermoplastic resin powder until molten and applying it to the glass fibers. The coated fibers can then be heated and drawn into a desired shape which also removes resin. Then the coated fibers are cooled to make a preform. The coated fiber preform can then be molded. Several resin layers with glass fibers of varying lengths can be deposited to make a graded preform. Apparatus for forming a thermoplastic resin on glass fibers sprays hot thermoplastic powder on the glass fibers. The coated fibers can then be heated such as by IR lamps and then drawn through a die which has a spigot to remove excess plastic. Alternately, a plurality of plastic and glass fiber layers can be deposited on a veil.

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R. L. Stadterman et al., "Thermoplastic Composite-Products and Applications", Tappi Journal, vol. 71, No. 9, Sep. 1988, pp. 145-147.

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