Importance

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Abstract

A process for producing coated, single twist glass yarns which comprises drawing a plurality of fibers formed from fibers of molten glass, applying to the fibers a sizing comprising a thermoplastic, thermosetting or photosetting composition, gathering the coated fibers into a yarn, imparting a continuous rotative twisting movement to the coated yarn and curing the coated yarn so as to polymerize and/or crosslink the sizing coating. An apparatus for performing this process comprises a spinneret having a plurality of nozzles or orifices from which fibers of molten glass are discharged; a device such as a rotating spindle for drawing a plurality of glass fibers from the spinneret; at least one coating applicator for applying the sizing coating to the glass fibers; a guide for gathering the coated fibers into a yarn; a device for imparting a single twist to the coated yarn, such as a strap spindle device and an irradiation apparatus for curing the sizing coating wherein the coating is crosslinked and/or polymerized.

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First Claim