A PROCESS FOR FORMING FLAT PLATE BALLISTIC RESISTANT MATERIALS

摘要

The present invention discloses a process for forming flat plate ballistic resistant composites which comprises impregnating a low-alkali magnesia-aluminum-silicate glass fiber woven roving with an impregnating composition. The impregnating composition comprises 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 107.2-123.8 DEG C (225-255 DEG 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 148.8 DEG C (300 DEG F) or below and to catalytically crosslink the polyester resin and monomeric solvent. Figure 4 is a graph showing areal density and thickness versus plies of prepreg composites formed according to the process of the present invention.