Abstract: The glass roving cloth includes glass rovings each composed of glass filaments, each having a filament diameter Dt of 9.5 to 30.0 ?m, bundled in a number bundled Ft of 400 to 8000 as a warp yarn and glass rovings each composed of glass filaments, each having a filament diameter Dy of 9.5 to 30.0 ?m, bundled in a number bundled Fy of 400 to 8000 as weft yarns, wherein the weaving density of the warp yarns and weft yarn is 2.0 to 14.0 yarns/25 mm, the average yarn width of the warp yarn and the weft yarn are each 500 to 8000 ?m, the widening rate of the warp yarn and the weft yarn are each 3.0 to 30.0%, the glass occupancy in the warp yarn direction is 90.0 to 106.0%, and the glass occupancy in the weft yarn direction is 75.0 to 99.0%.

Abstract: Provided is a glass composition for glass fiber that suppresses variations in fiber diameter of glass fiber including 45.60 to 59.00% by mass of SiO2, 10.00 to 16.00% by mass of Al2O3, 17.00 to 25.00% by mass of CaO, 0.01 to 9.50% by mass of TiO2, 0.03 to 7.00% by mass of P2O5, 0.00 to 9.50% by mass of ZnO, 0.00 to 2.00% by mass of SO3, 0.01 to 11.50% by mass in total of ZnO and SO3, and 0.00 to 2.00% by mass in total of Na2O, K2O, and Li2O, with respect to the total amount. The content SI of SiO2, the content A of Al2O3, the content C of CaO, the content T of TiO2, the content P of P2O5, the content Z of ZnO, and the content SO of SO3 satisfy the following formula (1): 15.0?(SI/C)2×(A/T)×{P/(SO+Z)}1/4?690.1??(1).

Abstract: Provided is a glass composition for glass fiber that suppresses variations in fiber diameter of glass fiber including 45.60 to 59.00% by mass of SiO2, 10.00 to 16.00% by mass of Al2O3, 17.00 to 25.00% by mass of CaO, 0.01 to 9.50% by mass of TiO2, 0.03 to 7.00% by mass of P2O5, 0.00 to 9.50% by mass of ZnO, 0.00 to 2.00% by mass of SO3, 0.01 to 11.50% by mass in total of ZnO and SO3, and 0.00 to 2.00% by mass in total of Na2O, K2O, and Li2O, with respect to the total amount. The content SI of SiO2, the content A of Al2O3, the content C of CaO, the content T of TiO2, the content P of P2O5, the content Z of ZnO, and the content SO of SO3 satisfy the following formula (1): 15.0?(SI/C)2×(A/T)×{P/(SO+Z)}1/4?690.1??(1).

Abstract: Provided is a glass fiber-reinforced resin molded article having high dimension stability and low dielectric characteristics. In the glass fiber-reinforced resin molded article, the fiber diameter D of glass fiber included in the glass fiber-reinforced resin molded article is in the range of 5.0 to 15.0 ?m, the dielectric constant Dk at a measurement frequency of 1 GHz of the glass fiber is in the range of 4.0 to 7.0, the linear expansion coefficient C of the glass fiber is in the range of 2.0 to 6.0 ppm/K, the number average fiber length L of the glass fiber is in the range of 150 to 400 ?m, and the D, Dk, C, and L satisfy the following formula (1): 57.9?Dk×C1/4×L1/2/D1/4?70.

Abstract: Provided is a metal-glass fiber-reinforced thermoplastic resin composite material that can have excellent bonding force and heat cycle resistance between a metal material and a glass fiber-reinforced thermoplastic resin material. The metal-glass fiber-reinforced thermoplastic resin composite material of the present invention is a metal-glass fiber-reinforced thermoplastic resin composite material including a metal material and a glass fiber-reinforced thermoplastic resin material located on at least one surface of the metal material, wherein glass fiber included in the glass fiber-reinforced thermoplastic resin material having a Vickers hardness H in the range of 700 to 800 HV0.2 and an elastic modulus M in the range of 70.0 to 110.0 GPa, and the Vickers hardness H and the elastic modulus M satisfy the following formula (1): 849.5 ? M3/H ? 940.5...(1).

Abstract: The glass roving cloth includes glass rovings each composed of glass filaments, each having a filament diameter Dt of 9.5 to 30.0 ?m, bundled in a number bundled Ft of 400 to 8000 as a warp yarn and glass rovings each composed of glass filaments, each having a filament diameter Dy of 9.5 to 30.0 ?m, bundled in a number bundled Fy of 400 to 8000 as weft yarns, wherein the weaving density of the warp yarns and weft yarn is 2.0 to 14.0 yarns/25 mm, the average yarn width of the warp yarn and the weft yarn are each 500 to 8000 ?m, the widening rate of the warp yarn and the weft yarn are each 3.0 to 30.0%, the glass occupancy in the warp yarn direction is 90.0 to 106.0%, and the glass occupancy in the weft yarn direction is 75.0 to 99.0%.

Abstract: Provided is a glass fiber-reinforced resin molded article having high dimension stability and low dielectric characteristics. In the glass fiber-reinforced resin molded article, the fiber diameter D of glass fiber included in the glass fiber-reinforced resin molded article is in the range of 5.0 to 15.0 ?m, the dielectric constant Dk at a measurement frequency of 1 GHz of the glass fiber is in the range of 4.0 to 7.0, the linear expansion coefficient C of the glass fiber is in the range of 2.0 to 6.0 ppm/K, the number average fiber length L of the glass fiber is in the range of 150 to 400 ?m, and the D, Dk, C, and L satisfy the following formula (1): 57.9?Dk×C1/4×L1/2/D1/4?70.

Abstract: Provided is a glass direct roving that can achieve good productivity for long glass fiber-reinforced thermoplastic resin pellets, and achieve excellent spinning productivity and good strength of glass fiber-reinforced resin molded articles produced by using long glass fiber-reinforced thermoplastic resin pellets in combination. The glass direct roving includes a plurality of glass filaments bundled together, wherein the filament diameter of the glass filaments, D, is in the range of 17.5 to 21.5 ?m, the number of the glass filaments bundled, F, is in the range of 3000 to 7000, the mass of the glass direct roving is in the range of 2450 to 4000 tex, the ignition loss of the glass direct roving, L, is in the range of 0.03 to 0.90%, and the D, F, and L satisfy the following formula (1): 1 ? 0 ? 5 ? 0 ? ( D 4 × F 1 / 4 ) / ( 1000 × L 1 / 6 ) ? 1 640.

Abstract: In the glass fiber-reinforced resin molded article, the glass fiber has a flat cross-sectional shape having a ratio of the major axis to the minor axis (major axis/minor axis) in the range of 5.0 to 10.0, the thermoplastic resin is polyaryletherketone, the number average fiber length L of the glass fiber having a length of 25 ?m or more contained in the glass fiber-reinforced resin molded article is in the range of 50 to 300 ?m, the proportion PS of the glass fiber having a length of 25 to 100 ?m contained in the glass fiber-reinforced resin molded article is in the range of 20.0 to 60.0%, the proportion PL of the glass fiber having a length of 500 m or more is in the range of 1.0 to 15.0%; and the L, PS, PL satisfy the following formula (1). 39.5?L×PS2/(1000×PL)?82.4 . . .

Abstract: Provided is a glass fiber-reinforced resin plate that comprises glass fiber having a flat cross-sectional shape and has an improved elastic modulus in the TD direction. The glass fiber-reinforced resin plate comprises a glass fiber having a flat cross-sectional shape and a resin, in which the glass fiber having a flat cross-sectional shape has a minor axis of 4.5 to 10.5 ?m, a major axis of 22.0 to 80.0 ?m, a ratio of the major axis to the minor axis (major axis/minor axis) R in the range of 4.5 to 10.0; the glass fiber content C is 5.0 to 75.0% by mass; the thickness H is in the range of more than 0.5 mm and 10.0 mm or less; and the C and H satisfy the following formula (1). 30.0?H×C?120.0??(1).

Abstract: Provided is a glass-fiber-reinforced resin plate excellent in dimensional stability, strength, surface smoothness, and productivity even if having a thickness of 0.5 mm or less. The present invention is a glass-fiber-reinforced resin plate having a thickness of 0.5 mm or less, comprising glass fiber that has a flat cross-sectional shape with a minor axis Ds in the range of 4.5 to 12.0 µm and a major axis DL in the range of 20.0 to 50.0 µm, and an amorphous thermoplastic resin, wherein the number average fiber length L of the glass fiber is in the range of 50 to 400 µm, the glass fiber content C is in the range of 25.0 to 55.0% by mass, and the Ds, DL, L, and C satisfy the following formula (1): 0.32 ? 1000 × Ds × DL3 × (C/100)4/L3 ? 1.22 ...(1).

Abstract: Provided is a glass fiber-reinforced resin composition that has excellent strength and an excellent modulus when processed into a glass fiber-reinforced resin molded article and has excellent processability on producing a glass fiber-reinforced resin molded article. In the glass fiber-reinforced resin composition, the content of SiO2S is 48 to 70% by mass and the content of Al2O3 A is 9 to 30% by mass with respect to the total amount of the glass fiber included therein, the glass fiber comprises a flat cross-sectional shape having a minor axis DS of 6.0 to 15.0 ?m and a major axis DL of 20.5 to 50.0 ?m, the glass fiber content C in the glass fiber-reinforced resin composition is from 65.0 to 85.0% by mass, and S, A, DS, DL, and C satisfy the following formula (1). 2.24?(100×(A2/S)×(C/100)8)/(DS3/4×DL1/4)?5.

Abstract: Provided is a glass multiple-ply roving that is excellent in impregnation quality of a thermoplastic resin for a random mat and workability in production of a random mat, and can impart excellent strength to a thermoplastic composite material. The glass multiple-ply roving includes a plurality of glass strands, wherein the weight of the glass strands, S, is in the range of 64 to 210 tex, the fiber diameter of the glass strands, D, is in the range of 9.0 to 18.0 ?m, the ignition loss of the glass multiple-ply roving, L, is in the range of 0.55 to 0.94%, and the S, D, and L satisfy the following formula (1): 4.10?1000×S1/2/(D3×L3)?7.10??(1).

Abstract: The glass roving cloth includes glass rovings each composed of glass filaments, each having a filament diameter Dt of 9.5 to 30.0 ?m, bundled in a number bundled Ft of 400 to 8000 as a warp yarn and glass rovings each composed of glass filaments, each having a filament diameter Dy of 9.5 to 30.0 ?m, bundled in a number bundled Fy of 400 to 8000 as weft yarns, wherein the weaving density of the warp yarns and weft yarn is 2.0 to 14.0 yarns/25 mm, the average yarn width of the warp yarn and the weft yarn are each 500 to 8000 ?m, the widening rate of the warp yarn and the weft yarn are each 3.0 to 30.0%, the glass occupancy in the warp yarn direction is 90.0 to 106.0%, and the glass occupancy in the weft yarn direction is 75.0 to 99.0%.

Abstract: Provided is a glass direct roving that can achieve good productivity for long glass fiber-reinforced thermoplastic resin pellets, and achieve excellent spinning productivity and good strength of glass fiber-reinforced resin molded articles produced by using long glass fiber-reinforced thermoplastic resin pellets in combination. The glass direct roving includes a plurality of glass filaments bundled together, wherein the filament diameter of the glass filaments, D, is in the range of 17.5 to 21.5 ?m, the number of the glass filaments bundled, F, is in the range of 3000 to 7000, the mass of the glass direct roving is in the range of 2450 to 4000 tex, the ignition loss of the glass direct roving, L, is in the range of 0.03 to 0.

Abstract: Provided is a glass fiber-reinforced resin molded article with high mechanical strength and in which occurrence of undispersion of glass fiber is suppressed. In the glass fiber-reinforced resin molded article, glass fiber includes a flat cross-sectional shape having a minor axis D1 in the range of 3.0 ?m or more and 10.5 ?m or less and a major axis D2 in the range of 11.0 ?m or more and 29.0 ?m or less, the number average fiber length L (?m) of the glass fiber included in the glass fiber-reinforced resin molded article is in the range of 195 ?m or more and less than 400 ?m, the glass fiber content C (wt %) in the glass fiber-reinforced resin molded article is in the range of more than 50.0 wt % and 80.0 wt % or less, and the D1, D2, L, and C satisfy the following formula (1): 1200.0?C×L2/(D1×D22)?2550.0 ??(1).

Abstract: Provided is a fiber-reinforced resin hollow cylindrical body that is highly resistant to torsion and also comprises impact energy absorbency enabling the cylindrical body to be used in an energy absorbing member such as a crush box. The fiber-reinforced resin hollow cylindrical body is composed of a reinforcing fiber yarn and a resin composition with which the reinforcing fiber yarn is impregnated. The fiber diameter D of the reinforcing fiber yarn is in the range of 10.0 to 18.0 ?m, the weight T of the reinforcing fiber yarn is in the range of 100 to 1500 tex, the volume content V of the reinforcing fiber yarn in the fiber-reinforced resin hollow cylindrical body is in the range of 40.0 to 80.0%, the D, T and V satisfy the following formula (1): 0.090?T1/4×V/D3?0.155 ??(1).

Abstract: Provided is a glass fiber-reinforced resin molded article having well-balanced and excellent static and dynamic strength and fluidity. In the glass fiber-reinforced resin molded article, glass fiber included in the glass fiber-reinforced resin molded article includes a flat cross-sectional shape having a minor axis D1 in the range of 3.0 to 10.5 ?m and a major axis D2 in the range of 11.0 to 29.0 ?m, the number average fiber length L (?m) of the glass fiber included in the glass fiber-reinforced resin molded article is in the range of 150 to 475 ?m, the glass fiber content C (wt %) in the glass fiber-reinforced resin molded article is in the range of 40.0 to 75.0 wt %, and the above DI, D2, L, and C satisfy the following formula (1): 260.0<C2×L/(D1×D22)<400.0??(1).

Abstract: Provided is a method for producing glass fiber, capable of stably performing the spinning of glass fibers without mixing of red crystals in glass fibers. When glass fibers are formed by discharging, from a nozzle tip, a molten glass obtained by melting glass raw materials mixed so as to give a glass composition including, when melted, in relation to the total amount thereof, SiO2 in a range from 57.0 to 62.0% by mass, Al2O3 in a range from 15.0 to 20.0% by mass, MgO in a range from 7.5 to 12.0% by mass, and CaO in a range from 9.0 to 16.5% by mass, and having a total content of SiO2, Al2O3, MgO and CaO of 98.0% by mass or more, the glass composition includes B2O3, Li2O, or B2O3 and Li2O as an additive or additives capable of suppressing the generation of red crystals.

Abstract: Provided is a glass fiber-reinforced resin molded article having well-balanced and excellent static and dynamic strength and fluidity. In the glass fiber-reinforced resin molded article, glass fiber included in the glass fiber-reinforced resin molded article includes a flat cross-sectional shape having a minor axis D1 in the range of 3.0 to 10.5 ?m and a major axis D2 in the range of 11.0 to 29.0 ?m, the number average fiber length L (?m) of the glass fiber included in the glass fiber-reinforced resin molded article is in the range of 150 to 475 ?m, the glass fiber content C (wt %) in the glass fiber-reinforced resin molded article is in the range of 40.0 to 75.0 wt %, and the above D1, D2, L, and C satisfy the following formula (1): 260.0?C2×L/(D1×D22)?400.0??(1).