Abstract: A process and apparatus for making densified glass fiber pellets substantially encapsulated in a polymeric shell from chopped segments of multi-filament glass strand is described. The densified pellets may be advantageously produced by hydrating chopped glass strands and then pelletizing them by tumbling in a rotary drum, densifying the resulting pellets by tumbling in a rotating zig-zag or undulating tube, drying the pellets and encapsulating them in a polymeric composition. The resulting pellets exhibit enhanced degradation resistance during bulk storage and handling.

Abstract: A process and apparatus for making densified glass fiber pellets substantially encapsulated in a polymeric shell from chopped segments of multi-filament glass strand is described. The densified pellets may be advantageously produced by hydrating chopped glass strands and then pelletizing them by tumbling in a rotary drum, densifying the resulting pellets by tumbling in a rotating zig-zag or undulating tube, drying the pellets and encapsulating them in a polymeric composition. The resulting pellets exhibit enhanced degradation resistance during bulk storage and handling.

Abstract: A process and apparatus for making densified glass fiber pellets substantially encapsulated in a polymeric shell from chopped segments of multi-filament glass strand is described. The densified pellets may be advantageously produced by hydrating chopped glass strands and then pelletizing them by tumbling in a rotary drum, densifying the resulting pellets by tumbling in a rotating zig-zag or undulating tube, drying the pellets and encapsulating them in a polymeric composition. The resulting pellets exhibit enhanced degradation resistance during bulk storage and handling.

Abstract: A system for making densified glass fiber pellets from chopped segments of multi-filament glass strand is described. The densified pellets may be advantageously produced by hydrating chopped glass strands and then pelletizing them by tumbling in a rotary drum, and densifying the resulting pellets by tumbling in a rotating zig-zag or undulating tube for a period of time sufficient to increase their density but insufficient to degrade the fibers to a point where composite articles formed from such pellets have lower tensile or impact strengths than comparable composite articles formed from unpelletized strand segments.

Abstract: A system for making densified glass fiber pellets from chopped segments of multi-filament glass strand is described. The densified pellets may be advantageously produced by hydrating chopped glass strands and then pelletizing them by tumbling in a rotary drum, and densifying the resulting pellets by tumbling in a rotating zig-zag or undulating tube for a period of time sufficient to increase their density but insufficient to degrade the fibers to a point where composite articles formed from such pellets have lower tensile or impact strengths than comparable composite articles formed from unpelletized strand segments.

Abstract: A reinforcing composition is provided comprising pellets produced by the process of hydrating glass fibers to achieve a water content on the glass fibers of from about 11 weight percent to about 20 weight percent, mixing the glass fibers for at least about three minutes, thereby forming pellets, and drying.

Abstract: A reinforcing composition is provided comprising pellets produced by the process of hydrating glass fibers to achieve a water content on the glass fibers of from about 11 weight percent to about 20 weight percent, mixing the glass fibers for at least about three minutes, thereby forming pellets, and drying.

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.

Abstract: High-strength magnesium aluminosilicate glass fibers coated with the dried residue of a dilute aqueous sizing composition containing emulsified epoxy resin or emulsified epoxy resin solution, both 3-methacryloxypropyltrimethoxysilane and 3-aminopropyltriethoxysilane, and at least one lubricant, are compatible as reinforcing elements with unsaturated polyester, vinylester and epoxy resin matrixes.

Abstract: Organo silane coupling agents having at least two hydrolyzable silane groups are disclosed. Glass fibers coated with these organo silanes are suitable for reinforcing cementitious materials.

Abstract: A glass fiber reinforced cementitious product and treated glass fibers for use in the reinforcement of cementitious materials wherein the reinforcement is in the form of bundles of glass fibers, the bundles including an alkali impervious impregnant therein to protect the glass fibers from alkaline materials liberated during age hardening of cementitious products. The use of impregnated bundles of glass fibers prevents or substantially minimizes loss in strength with aging of glass fiber-reinforced cementitious products as is characteristic of prior art products.

Abstract: An improved method of coating fibers and particularly glass fibers with a solution of materials containing a reversible shear thinning gel producing agent which causes the coating to be transformed into a shear thinning gel under predetermined conditions. The predetermined conditions may be brought about after the coated fibers are brought together into touching engagement in a package, or may be caused to occur before the coated fibers are brought together in touching engagement in the package. The fibers can be removed from the package and still retain a coating on the fibers, since the shearing action of the fibers through the gel converts the gel to a liquid which adheres to the fibers as they are being pulled through the gel. The predetermined conditions may involve a change in temperature, or a change in concentration of solids.

Abstract: A size and dispersion system for, and a method for, the production of glass mats, the size comprising a methyl trimethoxysilane and a malto-dextrin, the dispersion system comprising a nonionic guar gum and an isostearic amide.

Abstract: A porous article with a special finish treatment is provided, the article typically being an article of furniture, such as a cabinet door, by way of illustration. The article can be made of a molding compound comprising discrete glass fibers which can be produced by milling cured phenolic-bonded glass fibers. A coupling agent or binder is added to the milled fibers and the combination formed and cured under heat and pressure into the shape of the article. The surface of the formed article is porous and, in fact, the article is porous throughout its thickness. This presents a substantial problem in applying a satisfactory finish. To overcome this, with the article at an elevated temperature, it is immersed in a liquid containing particles in suspension, i.e. polyester liquid containing talc.

Abstract: Vinyl ester resin coated glass fibers are disclosed.The coated glass fibers are especially suited for reinforcing cementitious materials.