Plastic and nonmetallic article shaping or treating: processes – With printing or coating of workpiece – Coating or impregnating workpiece before molding or shaping...
Patent
1989-02-02
1991-04-09
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
With printing or coating of workpiece
Coating or impregnating workpiece before molding or shaping...
264 405, 264 406, 264258, 428911, 523511, B29C 4318, B29C 4320, B29C 4358
Patent
active
050062930
ABSTRACT:
A process for forming flat plate ballistic resistant composites which includes impregnating a low-alkali magnesia-aluminum-silicate glass fiber woven roving with an impregnating composition. The impregnating composition includes a resin solution of a polyester resin in a polymerizable monomeric solvent a free radical catalyst and optionally, a thickening agent and further optionally a flame retardant material. The impregnated woven roving is cured in a molding unit at a temperature of about 225.degree.-255.degree. F. for a sufficient period of time and at a sufficient pressure to allow the impregnated woven roving to substantially conform to the mold unit. The temperature and pressure used are sufficient to maintain the exothermic temperature at about 300.degree. F. or below and to catalytically crosslink the polyester resin and monomeric solvent.
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Beaver Terry R.
Hartman David R.
Hill Homer G.
Jutte Ralph B.
Durkin II Jeremiah F.
Gillespie Ted C.
Martineau Catherine B.
Owens-Corning Fiberglas Corporation
Pacella Patrick P.
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