Abstract: A binder for inorganic fiber, which comprises an aldehyde condensable thermosetting resin precursor and a fluorocarbon compound having a polyfluoroalkyl group.

Abstract: A heat insulating/sound absorbing material wherein the entire surface of an inorganic fiber mat is covered with a synthetic resin film or films and a method of producing the same. Front and rear surfaces of an inorganic fiber mat 12 as well as both side surfaces along a longer side thereof are covered with synthetic resin films 13, 14; both ends of the synthetic resin films in the direction of a longer side of the inorganic fiber mat 12 are extended from both ends in the direction of a shorter side thereof to thereby cover both end surfaces in the direction of a shorter side of the inorganic fiber mat 12; an adhesive is applied continuously or discontinuously along the direction of a longer side of film to a portion in the direction of a shorter side of the inorganic fiber mat whereby the inorganic fiber mat and the synthetic resin films, and a mutually opposing portion of the synthetic resin films are bonded so as to make air communicate through unbonded portions.

Abstract: A process for producing an inorganic molded product, which comprises a step of preparing a hardenable composition comprising 100 parts by mass of an acid metal phosphate, from 80 to 200 parts by mass of its hardener, and from 0.1 to 10 parts by mass of urea, a step of combining 100 parts by mass of the hardenable composition and from 5 to 100 parts by mass of an inorganic reinforcing material to obtain a molding material, a step of molding the molding material into a desired shape to obtain a semi-rigid material, and a step of heating the semi-rigid material at a temperature of at least 120° C. to complete hardening.

Abstract: A thermoplastic resin-combined glass fiber base material, which comprises a glass fiber strand having a plurality of glass monofilaments bundled and a thermoplastic resin impregnated thereto, and which: A) has a string form with an average diameter of from 0.2 to 1.5 mm, B) has a glass content of from 15 to 80 vol %, C) has an impregnation rate of the thermoplastic resin of at least 95%, and D) satisfies R≦30D×V, where R is the radius of curvature (mm) representing the buckling limit in bending, D is the average diameter (mm), and V is the glass content (vol %/100).

Abstract: A long fiber-reinforced thermoplastic resin molding material in the form of pellets each having inorganic filaments arranged substantially in the same length and in parallel in the same direction in a matrix of a thermoplastic resin, wherein the exposed ratio E as defined by the following formula (1) is at most 60%, on at least one end surface in the direction of the filaments of each pellet:E=(e/N).times.100 (1)where E is the exposed ratio (%), e is the number of inorganic filaments with their cross-sections exposed on at least one end surface in the direction of the filaments of each pellet, and N is the total number of inorganic filaments arranged in the pellet.

Abstract: A composite substrate for a waterproofing structure, which comprises a fiber mat and a closed cell foam sheet which are integrated by needling.

Abstract: A glass fiber strand for reinforcing a thermoplastic resin, consisting essentially of a strand of glass filaments having a sizing agent applied thereto and bundled, and an auxiliary resin capable of forming a polymer alloy with a main thermoplastic resin to be reinforced, coated on the surface of the strand.

Abstract: Spherical products of a heat-softened material are produced by supplying a molten heat-softened material into a C-shaped channel-like spinner with an open upper surface and a large number of orifices formed in its circumferential wall, at a rate of 0.020 kg/hr or lower per a single orifice of the spinner; rotating the spinner at a high speed to form cone-like fine streams of the molten material from the orifices by means of a centrifugal force; and flowing streams of a hot gas so as to traverse the fine streams of molten material to thereby heat the same resulting in reducing the viscosity of the molten material and to break the fine streams by the hot gas streams.

Abstract: A resin composition comprising polyphenylene sulfide and hypophosphorous acid or its salt.

Abstract: In a method of restarting operations for manufacturing filaments from a molten mass of a thermoplastic material after the occurrence of the breaking of a filament, the filaments being drawn at a regular, high speed from a large number of orifices formed in the bottom of a bushing, a bead of the molten mass formed at an orifice where the breaking of a filament occurs is detected to thereby generate a signal; the speed of elongating the filaments is reduced upon receiving the signal so that a filament elongated in the vicinity of the bead at the reduced speed is brought into contact with the bead elongated by gravity, and elongates the bead into a filament having a larger diameter, during which operations to produce a regular filament product are stopped; and the speed of elongating the filaments is increased to the regular speed.

Abstract: A process for preparing a cartridge for disposal of a radioactive waste liquid, which comprises filling glass fibers in a mold, heat-treating the fibers for partial fusion and molding them into a molded product of a predetermined shape, wherein at least one member selected from the group consisting of boric acid, silicic acid, lithium borate, lithium silicate, zinc borate, zinc silicate, an organic silane, a silica sol, an oil emulsion, and an alumina sol, is applied to the glass fibers or to the molded product.

Abstract: A Co-base heat resistant alloy consisting essentially of:from 0.05 to 1% by weight of C,from 0.05 to 2% by weight of one or both of Si and Mn,from 31 to 40% by weight of Cr,from 5 to 15% by weight of Ni,from 2 to 12% by weight of one or both of W and Mo andfrom 0.1 to 5% by weight of Hf, and optionally further containing:from 0.01 to 1% by weight of one or both of Al and Y,from 0.5 to 3% by weight of one or both of Ta and Nb andfrom 0.005 to 0.1% by weight of one or both of B and Zr,the rest being Co and unavoidable impurities.

Abstract: A core material for a fiber reinforced plastic comprises a glass fiber mat composed of glass fiber bundles and having a bulk density of from 50 to 150 kg/m.sup.3 and a porous material filled in void spaces in the glass fiber mat. The porous material is composed of a mixture of a thermoplastic resin and a filler such as a hollow inorganic filler.The core material is prepared by impregnating a glass fiber mat composed of elongated glass fiber bundles, with a mixture of the filler and a dispersion of the thermoplastic resin in a dispersing medium and their evaporating the dispersing medium from the impregnated glass fiber mat.

Abstract: A reinforcing mat for fiber reinforced plastic material comprises a first layer of longer glass fiber strands which are formed by collecting at least 300 glass fibers and are arranged in a non-directional and curled state and a second layer of shorter glass strands arranged in a non-directional state which has a thickness smaller than said first layer, said glass fiber strands of each layer being bonded with a binder.

Abstract: A glass fiber mat is prepared by piling a strand formed by collecting a number of glass fibers on a conveyor in a non-oriented state by making the strand into contact with a rotating cylinder to throw it; thus forming a mat like layer and piling another strand cutting or without cutting on said mat like layer to be a thin layer and said another strand being drawn from a cake.

Abstract: In a method of cleaning a fluorine-containing waste gas evolved frm a furnace, by contacting said gas with a fluorine-reactive powder and filtering the fluorine-reactive powder by a filter, an improvement comprising cooling the waste gas to 150.degree.-400.degree. C; feeding a fluorine-reactive powder into the cooled waste gas; passing the cooled waste gas through a filter on which the fluorine-reactive powder is deposited so as to react with the fluorine component of the waste gas; and removing the deposited powder layer from the filter.