Glass cloth and prepreg containing same
AssigneeHitachi Chemical Company, Ltd.
InventorsHaruki Yokono, Tsugihiko Hiratsuka
Life of this patent
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Abstract
At both ends of glass cloth comprising warp yarns consisting of a number of glass monofilaments and weft yarns consisting of a number of glass monofilaments, the weft yarns being cut at the ends of the glass cloth, glass monofilament-fixing portions are formed by fusing the ends of the weft yarns, by substituting a synthetic resin yarn for the warp yarn at the end of the glass cloth and melting the synthetic resin yarn or by attaching an adhesive tape to the ends of the glass cloth. The glass cloth having the glass monofilament-fixing portions at both ends thereof is advantageous in that no broken pieces of glass monofilament were formed when preparing prepreg or laminate using the glass cloth, and the laminate has excellent accuracy of thickness.
Claims5
A prepreg which comprises a glass cloth impregnated with a thermosetting resin varnish followed by heating and drying to form a B-stage thermosetting resin varnish impregnant therein, said glass cloth comprising warp yarns each consisting of a number of glass monofilaments and weft yarns each consisting of a number of glass monofilaments, said warp yarns being interwoven with said weft yarns and the weft yarns being cut at the ends of the glass cloth;
- both cut ends of the weft yarns having fixed portions of the glass monofilaments formed by bonding the cut ends of the weft yarns together whereby breakage of the cut ends is prevented.
Dependencies are inferred from the claim text.