FIBER-REINFORCED RESIN HOLLOW CYLINDRICAL BODY

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 μm, 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): 1. A fiber-reinforced resin hollow cylindrical body comprising a reinforcing fiber yarn and a resin composition with which the reinforcing fiber yarn is impregnated , whereina fiber diameter D of the reinforcing fiber yarn is in a range of 10.0 to 18.0 μm,a weight T of the reinforcing fiber yarn is in a range of 100 to 1500 tex,a volume content V of the reinforcing fiber yarn in the fiber-reinforced resin hollow cylindrical body is in a range of 40.0 to 80.0%, and {'br': None, 'i': ≤T', '×V/D, 'sup': 1/4', '3, '0.090≤0.155 \u2003\u2003(1)'}, 'the D, T and V satisfy the following formula (1)2. The fiber-reinforced resin hollow cylindrical body according to claim 1 , wherein the D is in a range of 10.5 to 16.0 μm claim 1 , the T is in a range of 150 to 1100 tex claim 1 , and the V is in a range of 55.0 to 75.0% claim 1 , the D claim 1 , T and V satisfy the following formula (2):{'br': None, 'i': ≤T', '×V/D, 'sup': 1/4', '3, '0.111≤0.127 \u2003\u2003(2).'}3. The fiber-reinforced resin hollow cylindrical body according to claim 2 , wherein the D claim 2 , T and V satisfy the following formula (3):{'br': None, 'i': ≤T', '×V/D, 'sup': 1/4', '3, '0.115≤0.125 \u2003\u2003(3)'}4. The fiber-reinforced resin hollow cylindrical body ...

Glass fiber-reinforced resin molded article

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 μm and a major axis D2 in the range of 11.0 to 29.0 μm, the number average fiber length L (μm) of the glass fiber included in the glass fiber-reinforced resin molded article is in the range of 150 to 475 μm, 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≤ C 2 ×L /( D 1× D 2 2 )≤400.0  (1).

GLASS DIRECT ROVING AND LONG GLASS FIBER-REINFORCED THERMOPLASTIC RESIN PELLET

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 μm, 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): 5. A long glass fiber-reinforced thermoplastic resin pellet comprising the glass direct roving according to and a thermoplastic resin.6. The long glass fiber-reinforced thermoplastic resin pellet according to claim 5 , wherein the thermoplastic resin is polypropylene or polyamide. The present invention relates to a glass direct roving and a long glass fiber-reinforced thermoplastic resin pellet.Glass fiber-reinforced resin molded articles are increasingly demanded as metal substitute materials. In particular, glass fiber-reinforced resin molded articles produced by using long glass fiber-reinforced thermoplastic resin pellets (LFT pellets), which contain a glass fiber bundle (glass direct roving) obtained by bundling thousands of continuous glass filaments at once and winding the bundled glass filaments (e.g., see Patent Literature 1), are attracting attention. Typically, the LFT pellets are obtained in such a manner that a glass roving is allowed to pass through a through hole of a die having a through hole formed therein together with a thermally melted matrix resin and drawn from the through hole, and the glass roving is then cut into pieces of predetermined length.Glass fiber- ...

Glass roving cloth and glass-fiber-reinforced resin sheet

The glass roving cloth includes glass rovings each composed of glass filaments, each having a filament diameter Dt of 9.5 to 30.0 μm, 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 μm, 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 μm, 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%.

GLASS FIBER-REINFORCED RESIN MOLDED ARTICLE

Provided is a glass fiber-reinforced resin molded article having excellent mechanical strength, heat resistance, long-term durability, and molding processability. This glass fiber-reinforced resin molded article is characterized in that glass fibers contained in the glass fiber-reinforced resin molded article have a fiber diameter D (μm) in a range from 3.0 to 12.0 μm; the glass fibers contained in the glass fiber-reinforced resin molded article have a number-average fiber length L (μm) in a range from 160 to 350 μm; the glass fiber-reinforced resin molded article has a glass fiber volume fraction V (%) in a range from 3.0 to 50.0%; and D, L, and V satisfy formula (1): 1. A glass fiber-reinforced resin molded article , wherein glass fibers contained in the glass fiber-reinforced resin molded article have a fiber diameter D (m) in a range from 3.5 to 8.0 μm;the glass fibers contained in the glass fiber-reinforced resin molded article have a number-average fiber length L (m) in a range from 180 to 260 μm;the glass fiber-reinforced resin molded article has a glass fiber volume fraction V (%) in a range from 5.0 to 30.0%; andD, L, and V satisfy formula (1):resin contained in the glass fiber-reinforced resin molded article is a thermoplastic resin;a tensile strength of the glass fiber-reinforced resin molded article is 185.0 MPa or higher; and {'br': None, 'i': D', '×L/V≤, 'sup': '2', '350.0≤800.0\u2003\u2003(1).'}, 'a deflection temperature under load of the glass fiber-reinforced resin molded article is 255.0° C. or higher2. (canceled)3. The glass fiber-reinforced resin molded article according to claim 1 , wherein D is in a range from 4.0 to 7.5 μm;L is in a range from 195 to 225 μm;V is in a range from 6.0 to 25.0%; and {'br': None, 'i': D', '×L/V≤, 'sup': '2', '400.0≤700.0\u2003\u2003(3).'}, 'D, L, and V satisfy formula (3)4. The glass fiber-reinforced resin molded article according to claim 1 , wherein D is in a range from 4.5 to 7.0 μm;L is in a range from 200 to ...

Glass-fiber-yarn connected body

The glass-fiber-yarn joined body 1 is provided with glass fiber yarns 2, 3, and a connection 5 in which a resin yarn 4 is wound around ends of both of the glass fiber yarns 2, 3, the ends being superimposed with each other. The connection 5 has a width W1 of 20 to 40 mm. When a connection diameter R as a total of diameters of the respective glass fiber yarns 2, 3 and the thickness of the resin yarn 4 wound around the connection 5 is 500 to 5000 μm and a mass of each of the glass fiber yarns 2, 3 is 200 to 6000 tex, a value of a ratio of mass of each of the glass fiber yarns 2, 3 relative to the connection diameter R is in the range of 0.32 to 2.00.

GLASS COMPOSITION FOR GLASS FIBER

Provided is a glass composition for glass fiber allowing spinning to be stably performed without mixing of red foreign substances into glass fibers. The glass composition for glass fiber includes, in relation to the total amount thereof, SiOin a content falling within a range from 57.0 to 60.0% by mass, AlOin a content falling within a range from 17.5 to 20.0% by mass, MgO in a content falling within a range from 8.5 to 12.0% by mass, CaO in a content falling within a range from 10.0 to 13.0% by mass and BOin a content falling within a range from 0.5 to 1.5% by mass, the total content of SiO, AlO, MgO and CaO being 98.0% by mass or more. 1. A glass composition for glass fiber comprising , in relation to the total amount thereof , SiOin a content falling within a range from 57.0 to 60.0% by mass , AlOin a content falling within a range from 17.5 to 20.0% by mass , MgO in a content falling within a range from 8.5 to 12.0% by mass , CaO in a content falling within a range from 10.0 to 13.0% by mass and BOin a content falling within a range from 0.5 to 1.5% by mass , the total content of SiO , AlO , MgO and CaO being 98.0% by mass or more.2. The glass composition for glass fiber according to claim 1 , comprising claim 1 , in relation to the total amount thereof claim 1 , SiOin a content falling within a range from 57.5 to 59.5% by mass claim 1 , AlOin a content falling within a range from 18.0 to 19.5% by mass claim 1 , MgO in a content falling within a range from 8.8 to 11.5% by mass and CaO in a content falling within a range from 10.3 to 12.5% by mass.3. The glass composition for glass fiber according to claim 1 , comprising claim 1 , in relation to the total amount thereof claim 1 , SiOin a content falling within a range from 58.0 to 59.3% by mass claim 1 , AlOin a content falling within a range from 18.2 to 19.0% by mass claim 1 , MgO in a content falling within a range from 9.0 to 11.0% by mass and CaO in a content falling within a range from 10.5 to 12.0% by mass ...

GLASS FIBER PRODUCTION METHOD

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, SiOin a range from 57.0 to 62.0% by mass, AlOin 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 SiO, AlO, MgO and CaO of 98.0% by mass or more, the glass composition includes BO, LiO, or BOand LiO as an additive or additives capable of suppressing the generation of red crystals. 1. A method for producing glass fiber , 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 comprising , when melted , in relation to the total amount thereof , SiOin a range from 57.0 to 62.0% by mass , AlOin 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 SiO , AlO , MgO and CaO of 98.0% by mass or more , the glass composition comprises BO , LiO , or BOand LiO , as an additive or additives capable of suppressing generation of red crystals.2. The method for producing glass fiber according to claim 1 , wherein the glass fibers each have a modified cross sectional shape in which a ratio (major axis/minor axis) of the major axis to the minor axis of the cross sectional shape falls within a range from 2.0 to 6.0.3. The method for producing glass fiber according to claim 1 , wherein the glass fibers each have a modified cross sectional shape in which a fiber diameter defined as a diameter when a cross-sectional area is converted to a perfect circle claim 1 , falls within a range from 10 to 30 μm.4. The ...

Glass fiber production method

Glass fiber production method

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, SiO 2 in a range from 57.0 to 62.0% by mass, Al 2 O 3 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 SiO 2 , Al 2 O 3 , MgO and CaO of 98.0% by mass or more, the glass composition includes B 2 O 3 , Li 2 O, or B 2 O 3 and Li 2 O as an additive or additives capable of suppressing the generation of red crystals.

Glass direct roving and long glass fiber-reinforced thermoplastic resin pellet

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 μm, 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. ( 1 )

Glass fiber reinforced resin molded article

Glass fiber yarn connected body

Glass fiber-reinforced resin molded article

Glass fiber production method

本發明係提供一種於玻璃纖維中不會混入紅色結晶並可穩定地進行紡絲的玻璃纖維之製造方法。將經調配而成為下述玻璃組成物的玻璃原料進行熔融，將所得到的熔融玻璃從噴嘴尖頭吐出並形成玻璃纖維時，該玻璃組成物包含B2O3、Li2O或B2O3與Li2O來作為可抑制紅色結晶之產生的添加物，該玻璃組成物係於熔融時包含相對於總量為57.0~62.0質量%之範圍的SiO2、15.0~20.0質量%之範圍的Al2O3、7.5~12.0質量%之範圍的MgO、與9.0~16.5質量%之範圍的CaO，且SiO2、Al2O3、MgO及CaO之合計量為98.0質量%以上。

Glass composition for glass fibers, glass fiber, and glass fiber-reinforced resin molded product

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).

Glass fiber-reinforced resin molded product

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 μm, 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 μm, and the D, Dk, C, and L satisfy the following formula (1):57.9≤Dk×C1/4×L1/2/D1/4≤70.6  (1)

Glass fibers for resin reinforcement use and glass fiber-reinforced resin molded article

Provided is a glass fiber for resin reinforcement that has excellent processability, and enables a fiber-reinforced resin molded article having excellent mechanical properties to be obtained. The glass fiber for resin reinforcement comprises a glass fiber, and organic matter adhered to the surface of the glass fiber, wherein the amount of nitrogen N of the organic matter is 0.010 to 0.600% by mass based on the total amount of the glass fiber for resin reinforcement, the amount of carbon C of the organic matter is 0.120 to 1.500% by mass based on the total amount of the glass fiber for resin reinforcement, the ignition loss L of the glass fiber for resin reinforcement is 0.200 to 2.000% by mass, and the N, C, and L satisfy the following formula (1): 0.220 ≤ (N × C) 1/2 /L ≤ 0.405 ... (1).

Method for producing long glass fibers

Provided is a method for manufacturing glass long fiber that can be produced into resin pellets without clogging of recovered glass fiber in a kneader, when glass fiber recovered from a glass fiber-reinforced resin molded product and a resin are kneaded to prepare resin pellets. In the method for manufacturing glass long fiber of the present invention, a glass raw material including glass fiber recovered from a glass fiber-reinforced resin molded product is melted into molten glass, and the molten glass is spun to form glass long fiber.

Composicion de resina reforzada con fibra de vidrio y articulo moldeado de resina reforzada con fibra de vidrio.

Se proporciona una composición de resina reforzada con fibra de vidrio que tiene una resistencia excelente y un módulo excelente cuando se procesa en un artículo moldeado de resina reforzada con fibra de vidrio y tiene una procesabilidad excelente para producir un artículo moldeado de resina reforzada con fibra de vidrio. En la composición de resina reforzada con fibra de vidrio, el contenido de SiO2 S es 48 a 70% en masa y el contenido de Al2O3 A es del 9 al 30% en masa con respecto a la cantidad total de fibra de vidrio incluida en el mismo, la fibra de vidrio tiene una forma de sección transversal plana que tiene un eje menor DS de 6.0 a 15.0 µm y un eje mayor DL de 20.5 a 50.0 µm, el contenido de fibra de vidrio C en la composición de resina reforzada con fibra de vidrio es de 65.0 a 85.0% en masa, y S, A, DS, DL y C satisfacen la siguiente fórmula (1). 2.24 = (100 x (A2/S) x (C/100)8)/(DS3/4 x DL1/4) = 5.85 (1).

Glass roving cloth and glass-fiber-reinforced resin sheet

Glass-fiber-reinforced resin composition and molded glass-fiber-reinforced resin article

Metal-glass fiber-reinforced thermoplastic resin composite material

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 ≤ M 3 /H ≤ 940.5...(1).

Glass-fiber-reinforced resin plate

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 D s in the range of 4.5 to 12.0 µm and a major axis D L 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 D s , D L , L, and C satisfy the following formula (1): 0.32 ≤ 1000 × D s × D L 3 × (C/100) 4 /L 3 ≤ 1.22 ...(1).

Glass roving cloth and glass-fiber-reinforced resin sheet

Glass roving cloth and glass-fiber-reinforced resin sheet

The glass roving cloth includes glass rovings each composed of glass filaments, each having a filament diameter Dt of 9.5 to 30.0 μm, 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 μm, 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 μm, 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%.

Glass fiber-reinforced resin molded article

扁平断面ガラス繊維、及び、ガラス再生材料を含むガラス原料からの扁平断面ガラス繊維の製造方法

【課題】連続生産性及び大量生産適性に優れ、かつ、優れた樹脂成形品強化性を得ることができる扁平断面ガラス繊維、及び、ガラス再生材料を含むガラス原料からの扁平断面ガラス繊維の製造方法を提供する。【解決手段】所定の範囲の長さの長径と所定の範囲の長さの短径とを備える扁平な断面形状を有する扁平断面ガラスフィラメントを複数本含む扁平断面ガラス繊維であって、前記短径の長さが、３．５～１０．５μｍの範囲にあり、前記短径の長さに対する長径の長さの比（長径の長さ／短径の長さ）が１．５～９．０の範囲にあり、前記短径の長さの変動係数が８．０～２６．１％の範囲にあることを特徴とする。【選択図】 なし

Glass composition for glass fibers, glass fiber, and glass fiber-reinforced resin molded article

Provided is a glass composition for glass fiber that has a broad working temperature range and can suppress occurrence of a difference in an elastic modulus from that of E-glass fiber. The glass composition for glass fiber includes 45.60 to 59.00% by mass of SiO 2 , 0.00 to 8.00% by mass of B 2 O 3 , 10.00 to 16.00% by mass of Al 2 O 3 , 17.00 to 25.00% by mass of CaO, 0.01 to 9.50% by mass of TiO 2 , less than 0.03% by mass of P 2 O 5 , 0.00 to 9.50% by mass of ZnO, 0.00 to 2.00% by mass of SO 3 , 0.01 to 11.50% by mass in total of ZnO and SO 3 , and 0.00 to 2.00% by mass in total of Li 2 O, Na 2 O, and K 2 O, with respect to the total amount. The SiO 2 content SI, the B 2 O 3 content B, the TiO 2 content T, the ZnO content Z, and the SO 3 content SO satisfy the following formula (1). 1.79 ≤ SI / B × T / Z + SO 1 / 4 ≤ 122.98

Glass fiber-reinforced resin plate

Glass composition for glass fibers, glass fiber, and glass fiber-reinforced resin molded product

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 SiO 2 , 10.00 to 16.00% by mass of Al 2 O 3 , 17.00 to 25.00% by mass of CaO, 0.01 to 9.50% by mass of TiO 2 , 0.03 to 7.00% by mass of P 2 O 5 , 0.00 to 9.50% by mass of ZnO, 0.00 to 2.00% by mass of SO 3 , 0.01 to 11.50% by mass in total of ZnO and SO 3 , and 0.00 to 2.00% by mass in total of Na 2 O, K 2 O, and Li 2 O, with respect to the total amount. The content SI of SiO 2 , the content A of Al 2 O 3 , the content C of CaO, the content T of TiO 2 , the content P of P 2 O 5 , the content Z of ZnO, and the content SO of SO 3 satisfy the following formula (1): 15.0≤(SI/C) 2 ×(A/T)×{P/(SO+Z)} 1/4 ≤690.1  (1).

Glass Direct Roving and Glass Filament-Reinforced Thermoplastic Resin Pellets

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): 1050 ? (D4 x F1/4)/(1000 x L1/6) ? 1640 ... (1)

シャフト材

【課題】ねじりへの耐性が強いシャフト材を提供する。【解決手段】シャフト材は、強化繊維糸と、該強化繊維糸に含浸された樹脂組成物とで構成される繊維強化樹脂中空円筒体からなる。強化繊維糸の繊維径Ｄが１０．０〜１８．０μｍであり、重量Ｔが１００〜１５００ｔｅｘであり、繊維強化樹脂中空円筒体における強化繊維糸の体積含有率Ｖが４０．０〜８０．０％であり、前記Ｄ、Ｔ及びＶが下記式（１）を満たす。強化繊維糸が、４００〜８０００本のガラスフィラメントが集束されたガラス繊維糸であり、繊維強化樹脂中空円筒体の最大せん断応力が３００ＭＰａ以上であり、かつ、せん断弾性率が１１．０ＧＰａ以上であって、フィラメントワインディング成形品からなる。０．０９０≦Ｔ1/4×Ｖ／Ｄ3≦０．１５５・・・（１）【選択図】 なし

Long glass fiber manufacturing method, and long glass fiber

A method for manufacturing glass long fiber using recovered glass fiber, capable of manufacturing glass long fiber in which a recycle rate is increased, increase of a liquid phase temperature of molten glass and narrowing of an operating temperature range of the molten glass are suppressed, and a spinning temperature is low The method includes a glass melting step of melting a glass raw material containing glass fiber recovered from a glass fiber-reinforced resin molded product, and a glass fiber mineral material to obtain molten glass; and a spinning step of spinning the molten glass to obtain glass long fiber, and a content of the recovered glass fiber in the glass raw material is in the range of 11 to 75% by mass, and differences in the contents of SiO 2 , Al 2 O 3 , B 2 O 3 , and CaO between the glass fiber mineral material and the recovered glass fiber satisfy a prescribed relationship.

Glass fiber-reinforced resin molded article

Glass composition for glass fibers, glass fiber, and glass fiber-reinforced resin molded product

Glass fibers for resin reinforcement use and glass fiber-reinforced resin molded article

Provided is a glass fiber for resin reinforcement that has excellent processability, and enables a fiber-reinforced resin molded article having excellent mechanical properties to be obtained. The glass fiber for resin reinforcement comprises a glass fiber, and organic matter adhered to the surface of the glass fiber, wherein the amount of nitrogen N of the organic matter is 0.010 to 0.600% by mass based on the total amount of the glass fiber for resin reinforcement, the amount of carbon C of the organic matter is 0.120 to 1.500% by mass based on the total amount of the glass fiber for resin reinforcement, the ignition loss L of the glass fiber for resin reinforcement is 0.200 to 2.000% by mass, and the N, C, and L satisfy the following formula (1): 0.220≤(N×C) 1/2 /L≤0.405 . . . (1).

Glass direct roving and glass filament-reinforced thermoplastic resin pellets

Method for producing long glass fibers

Provided is a method for manufacturing glass long fiber that can be produced into resin pellets without clogging of recovered glass fiber in a kneader, when glass fiber recovered from a glass fiber-reinforced resin molded product and a resin are kneaded to prepare resin pellets. In the method for manufacturing glass long fiber of the present invention, a glass raw material including glass fiber recovered from a glass fiber-reinforced resin molded product is melted into molten glass, and the molten glass is spun to form glass long fiber.

Glass reinforced resin molded article

A glass-reinforced resin molded article that enables the anisotropy of a shrinkage ratio and a TD direction shrinkage ratio to be reduced. The glass-reinforced resin molded article includes 10.0 to 90.0% by mass of a glass-reinforcing material and a thermoplastic resin, wherein the glass-reinforcing material includes flat cross-section glass fiber having a flat cross-sectional shape of which a ratio of a major axis to a minor axis is 3.0 to 10.0, a content C of the flat cross-section glass fiber is 10.0 to 80.0% by mass, the major axis D is 25.0 to 55.0 μm, a proportion P of glass-reinforcing material having a length of 50 to 100 μm with respect to the total number of glass-reinforcing material having a length of 50 μm or more is 4 to 50%, and the C, D, and P satisfy the following formula (1): 0 . 4 ⁢ 6 ≤ P / ( C × D ) 1 / 2 ≤ 0.99 . ( 1 )

Glass fiber-reinforced resin molded article

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 µm and a major axis D2 in the range of 11.0 to 29.0 µm, the number average fiber length L (µm) of the glass fiber included in the glass fiber-reinforced resin molded article is in the range of 150 to 475 µm, 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 ≤ C 2 × L / D 1 × D 2 2 ≤ 400.0

Glass composition for glass fibers, glass fiber, and glass fiber-reinforced resin molded product

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 LizO, 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/C2×A/T×P/SO+Z1/4≤690.1

Glass multiple-ply roving, random mat for forming thermoplastic composite material, and glass-fiber-reinforced thermoplastic resin sheet

Glass-fiber-reinforced resin plate

Glass composition for glass fibers, glass fiber, and glass fiber-reinforced resin molded article

A glass composition for glass fiber that has a broad working temperature range and can suppress an elastic modulus difference from that of E-glass fiber. The composition includes 45.60 to 59.00% by mass of SiO2, 0.00 to 8.00% by mass of B2O3, 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, less than 0.03% 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 Li2O, Na2O, and K2O, with respect to the total amount. The SiO2 content SI, the B2O3 content B, the TiO2 content T, the ZnO content Z, and the SO3 content SO satisfy the following formula (1).1.79≤(SI/B)×T/(Z+SO)1/4≤122.98(1)

Wyrób uformowany z żywicy wzmocnionej włóknem szklanym

Long glass fiber manufacturing method, and long glass fiber

A method for manufacturing glass long fiber using recovered glass fiber, capable of manufacturing glass long fiber in which a recycle rate is increased, increase of a liquid phase temperature of molten glass and narrowing of an operating temperature range of the molten glass are suppressed, and a spinning temperature is low. The method includes a glass melting step of melting a glass raw material containing glass fiber recovered from a glass fiber-reinforced resin molded product, and a glass fiber mineral material to obtain molten glass; and a spinning step of spinning the molten glass to obtain glass long fiber, and a content of the recovered glass fiber in the glass raw material is in the range of 11 to 75% by mass, and differences in the contents of SiO2, Al2O3, B2O3, and CaO between the glass fiber mineral material and the recovered glass fiber satisfy a prescribed relationship.

Glass-fiber-reinforced resin plate

Long glass fiber manufacturing method, and long glass fiber

A method for manufacturing glass long fiber using recovered glass fiber, capable of manufacturing glass long fiber in which a recycle rate is increased, increase of a liquid phase temperature of molten glass and narrowing of an operating temperature range of the molten glass are suppressed, and a spinning temperature is low. The method includes a glass melting step of melting a glass raw material containing glass fiber recovered from a glass fiber-reinforced resin molded product, and a glass fiber mineral material to obtain molten glass; and a spinning step of spinning the molten glass to obtain glass long fiber, and a content of the recovered glass fiber in the glass raw material is in the range of 11 to 75% by mass, and differences in the contents of SiO2, Al2O3, B2O3, and CaO between the glass fiber mineral material and the recovered glass fiber satisfy a prescribed relationship.

Glass roving cloth and glass-fiber-reinforced resin sheet

Provided is a glass roving cloth which is provided with excellent weaving performance and excellent resin impregnability, and from which it is possible to realize a glass-fiber-reinforced resin sheet that is provided with high mechanical strength and excellent shaping properties. This glass roving cloth has, as the warp thereof, glass roving in which glass filaments provided with a filament diameter Dt of 9.5-30.0 µm are bundled at a filament count Ft of 400-8000, and has, as the weft thereof, glass roving in which glass filaments provided with a filament diameter Dy of 9.5-30.0 µm are bundled at a filament count Ft of 400-8000, the weave density of the warp and the weft is in the range of 2.0-14.0/25 mm, the warp average yarn width and the weft average yarn width are in the range of 500-8000 µm, the warp widening rate and the weft widening rate are in the range of 3.0-30.0%, the glass occupancy in the warp direction is in the range of 90.0-106.0%, and the glass occupancy in the weft direction is in the range of 75.0-99.0%.

Glass composition for glass fiber

Provided is a glass composition for glass fiber allowing spinning to be stably performed without mixing of red foreign substances into glass fibers. The glass composition for glass fiber includes, in relation to the total amount thereof, SiO 2 in a content falling within a range from 57.0 to 60.0% by mass, Al 2 O 3 in a content falling within a range from 17.5 to 20.0% by mass, MgO in a content falling within a range from 8.5 to 12.0% by mass, CaO in a content falling within a range from 10.0 to 13.0% by mass and B 2 O 3 in a content falling within a range from 0.5 to 1.5% by mass, the total content of SiO 2 , Al 2 O 3 , MgO and CaO being 98.0% by mass or more.