Abstract: A ballistic shield comprises a roll of ballistic blanket material having at one end thereof a device for attaching it at least temporarily to a structure so that the blanket may be unrolled to from a free hanging screen.

Abstract: An incandescent mantle tie cord comprises a continuous multifilament first core of a refractory fiber, a second core of another continuous multifilament yarn and an outer sheath of staple fibers wrapped about said first and second cores.

Abstract: An asbestos-free heat settable composition includes a fibrous reinforcement comprising aramid fibres in the form of a carded or needled non-woven web or felt, or a loosely woven or knitted fabric.

Abstract: Continuous multifilament glass fiber roving of from 300 to 10,000 tex is rendered catenary-free without twisted by passing it at from 150 to 300 meters/minute through an air treatment zone in which it is exposed to air at from 400 to 600 KN/meter.sup.2 at a volume throughput of from 0.5 to 1.5 cubic meters/minute, the air treatment being carried out in the absence of positive overfeed whereby there is no bulking of the roving, followed by winding the treated roving into a package.

Abstract: Asbestos-free fibre reinforced sheet material comprises from 10 to 35% by weight of a cured elastomeric binder and from 20 to 70% by weight of glass fibres (including ceramic fibres, or mineral fibres or mixtures of these) surface treated with a composition which is readily soluble in the solvent used in compounding the elastomeric binder.

Abstract: Apparatus for drawing newly-spun and dressed glass filaments from a bushing comprises, in combination, a rotary cutter constituted by a blade roll with radially directed blades projecting from its surface and a second, back-up roll having a resilient surface, said rolls being mounted with their axes substantially parallel and with at least the tips of the blades in contact with said resilient surface to define a cutting zone for the cutter, together with an auxiliary, independently driven start-up roll, variable speed drive means for accelerating said auxiliary roll to a surface speed at least equal to the surface speed of the back-up roll under production conditions, and guide means operable to divert a bundle of filaments being wound on said auxiliary roll to the surface of the back-up roll and thereafter into the cutting zone of the cutter, whereby the filaments are cut into staple fibres. A method of manufacturing staple fibres based on the use of above apparatus is also disclosed.

Abstract: Solid woven conveyor belting is produced by a process which includes the steps of subjecting the fabric carcass to a plurality of alternating changes of direction while immersed in a bath of impregnant material, and then heating the carcass to gel the impregnant. Each of the alternating changes of direction are effected by causing the carcass to follow a generally curved path whose radius of curvature is appreciably less than 75 mm. Prior to immersion, a synthetic polymeric yarn-containing carcass is subjected to a shrinking treatment effective to close the interstices of said carcass to some extent to reduce the impregnant material expelled upon subsequent heating to gel the impregnant.

Abstract: A thermoplastic moulding material comprising (a) a synthetic thermoplastic polymer having a backbone comprising at least 50% of carbon atoms and selected from polypropylene, polyethylene, polystyrene, styrene/acrylonitrile copolymers, polyester, polyamides, ABS copolymers and acetal copolymers (b) from 0.05 to 10 percent by weight, based on the total weight of material, of polyimide pre-polymer (c) a reinforcing agent selected from glass fiber and mica.

Abstract: A process for the production of fibre-reinforced sheet material in indefinite lengths comprises a first rolling step wherein a curable dough of thermoplastic polymer containing reinforcing fibres is rolled onto one face of a band to form a first coating which is dried prior to a second rolling step wherein further dough is rolled onto the first coating to form with the first coating a single layer; said single layer is dried, stripped from the band and cured. The dough includes a special solvent system comprising a solvent for the polymer and a non-solvent liquid, to give the dough a "release" characteristic.

Abstract: A thermoplastic moulding material comprises styrene/acrylonitrile copolymer, an elastomeric material having elongation at break greater than the styrene acrylonitrile copolymer, a polyimide prepolymer and a reinforcing filler.The polyimide prepolymer is an addition polyimide prepared from a polyamine and a bis-imide of an unsaturated carboxylic acid.The specified reinforcing filler is glass fibre or mica, although other fillers may be included with these.

Abstract: Asbestos fibre is dispersed in an aqueous medium essentially comprised of water, soap and from 25 to a 100 percent molar excess of fatty acid, said excess being calculated on the amount of fatty acid combined in the soap, to form a colloidal dispersion.

Abstract: A thermoplastic moulding material composed of a polymer selected from polypropylene, polyethylene, polystyrene, styrene/acrylonitrile copolymers, polyesters polyamides, ABS copolymers and acetal copolymers. The material contains glass or mica as reinforcing agent and 0.01% to 0.05% by weight of a polyimide prepolymer.

Abstract: A glass fibre product consists of less than 80% by weight SiO.sub.2 from 20 to 25% by weight of TiO.sub.2 and not more than about 0.1% by weight of alkali metal oxide, and is made by leaching with acid a glass fibre composition consisting of from 20 to 40% by weight of alkali metal oxide, from more than 12 up to 20% TiO.sub.2 and the balance to 100% of SiO.sub.2 and having a silica:titania ratio within a selected range.

Abstract: A process for making a dispersion-based asbestos strand for later twisting to form a yarn comprises (a) forming an elongate continuous stream from an aqueous coagulable dispersion comprised of asbestos fibres, water and dispersion-forming chemicals; (b) coagulating said dispersion in said stream to form a self-sustaining asbestos fibre strand containing coagulated dispersion-forming chemicals together with uncoagulated residues thereof and water; (c) while said strand is in an untwisted state removing substantially the whole of the coagulated dispersion-forming chemicals and said uncoagulated residues thereof; and (d) adjusting the water content of the strand to provide an untwisted strand formed substantially wholly of said asbestos fibres and containing not more than 20% by weight of water.

Abstract: This invention relates to a metal-cored asbestos-rubber gasket wherein openings are formed in the gasket with the openings being defined by eyelets. The eyelets have flanges which engage the facing layers of the gasket and normal cracking of the eyelets incipient to incorporation thereof in the gasket is prevented by incorporating in the facing layer material microspheres in a sufficient amount to permit crushing thereof by the eyelet flanges under pressure.

Abstract: Glass compositions, having improved chemical resistance and useful in the form of fibers for reinforcing cementitious materials, consisting essentially of:From 50 to 75 percent by weight SilicaFrom 10 to 25 percent by weight R.sub.2 Ofrom 1 to 15 percent by weight TitaniaFrom 1 to 20 percent by weight ZirconiaFrom 0.8 to 20 percent by weight Rare Earth OxideFrom 0 to 20 percent by weight Boric OxideFrom 0 to 10 percent by weight R.sup.1 Ofrom 0 to 1 percent by weight Fluorine as (fluoride)From 0 to 2 percent by weight Al.sub.2 O.sub.3from 0 to 1 percent by weight P.sub.2 O.sub.5from 0 to 1 percent by weight Chlorine (as chloride)Where R.sub.2 O is sodium oxide, potassium oxide or a mixture of both, optionally including up to 5% by weight of lithium oxide (based on the total composition) and R.sup.1 O is MgO, CaO, BaO or SrO, or a mixture of two or more thereof.