PROCESS FOR FORMING FLAT PLATE BALLISTIC RESISTANT MATERIALS

25 A PROCESS FOR FORMING FLAT PLATE BALLISTIC RESISTANT MATERIALS 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 impreg...

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Hauptverfasser:	JUTTE, RALPH B, HILL, HOMER G, BEAVER, TERRY R, HARTMAN, DAVID R
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING ARMOUR ARMOURED OR ARMED VEHICLES ARMOURED TURRETS BLASTING CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING HEATING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS LIGHTING MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL MECHANICAL ENGINEERING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WEAPONS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	25 A PROCESS FOR FORMING FLAT PLATE BALLISTIC RESISTANT MATERIALS 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.degree.C (225-255.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 148.8.degree.C (300.degree.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.