WO2005090664A1 - 等方性ピッチ系炭素繊維紡績糸、それを用いた複合糸及び織物、並びにそれらの製造方法 - Google Patents
等方性ピッチ系炭素繊維紡績糸、それを用いた複合糸及び織物、並びにそれらの製造方法 Download PDFInfo
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- WO2005090664A1 WO2005090664A1 PCT/JP2005/005159 JP2005005159W WO2005090664A1 WO 2005090664 A1 WO2005090664 A1 WO 2005090664A1 JP 2005005159 W JP2005005159 W JP 2005005159W WO 2005090664 A1 WO2005090664 A1 WO 2005090664A1
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- Prior art keywords
- spun yarn
- carbon fiber
- yarn
- based carbon
- isotropic pitch
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Classifications
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
- D03D15/242—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads inorganic, e.g. basalt
- D03D15/275—Carbon fibres
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/40—Yarns in which fibres are united by adhesives; Impregnated yarns or threads
- D02G3/404—Yarns or threads coated with polymeric solutions
- D02G3/406—Yarns or threads coated with polymeric solutions where the polymeric solution is removable at a later stage, e.g. by washing
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
- D02G3/04—Blended or other yarns or threads containing components made from different materials
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/38—Threads in which fibres, filaments, or yarns are wound with other yarns or filaments, e.g. wrap yarns, i.e. strands of filaments or staple fibres are wrapped by a helically wound binder yarn
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
- D03D15/283—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads synthetic polymer-based, e.g. polyamide or polyester fibres
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
- D03D15/44—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads with specific cross-section or surface shape
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
- D03D15/60—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the warp or weft elements other than yarns or threads
- D03D15/68—Scaffolding threads, i.e. threads removed after weaving
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
- D06M10/02—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements ultrasonic or sonic; Corona discharge
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2101/00—Inorganic fibres
- D10B2101/10—Inorganic fibres based on non-oxides other than metals
- D10B2101/12—Carbon; Pitch
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2915—Rod, strand, filament or fiber including textile, cloth or fabric
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2918—Rod, strand, filament or fiber including free carbon or carbide or therewith [not as steel]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2933—Coated or with bond, impregnation or core
- Y10T428/2964—Artificial fiber or filament
- Y10T428/2967—Synthetic resin or polymer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/2933—Coated or with bond, impregnation or core
- Y10T428/2964—Artificial fiber or filament
- Y10T428/2967—Synthetic resin or polymer
- Y10T428/2969—Polyamide, polyimide or polyester
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/10—Scrim [e.g., open net or mesh, gauze, loose or open weave or knit, etc.]
- Y10T442/102—Woven scrim
- Y10T442/159—Including a nonwoven fabric which is not a scrim
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/10—Scrim [e.g., open net or mesh, gauze, loose or open weave or knit, etc.]
- Y10T442/184—Nonwoven scrim
- Y10T442/186—Comprising a composite fiber
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/30—Woven fabric [i.e., woven strand or strip material]
- Y10T442/3976—Including strand which is stated to have specific attributes [e.g., heat or fire resistance, chemical or solvent resistance, high absorption for aqueous composition, water solubility, heat shrinkability, etc.]
Definitions
- the present invention relates to a spun carbon fiber yarn using isotropic pitch-based carbon fiber as a raw material, a composite yarn and a woven fabric thereof, and a method for producing the same.
- Carbon fibers mainly used include PAN-based carbon fibers made from acrylic fibers (PAN fibers) and pitch-based carbon fibers made from pitch.
- PAN fibers PAN-based carbon fibers are mainly used in the form of long fibers because short fibers are difficult to obtain as spun yarns with high tensile strength.Since they are impregnated with a sizing agent, they are used in textiles using a high-speed loom. ing .
- the woven fabric is good in performance, there is a problem that its use is limited due to its high cost.
- pitch-based carbon fibers include anisotropic pitch-based carbon fibers and isotropic pitch-based carbon fibers.
- Anisotropic pitch-based carbon fibers have crystal perfection and hexagonal mesh plane fiber axes. Due to the high orientation structure in the direction, the elastic modulus is high and the flexibility is insufficient, so that weaving by a high-speed loom is difficult.
- isotropic pitch-based carbon fiber generally, it is manufactured as a short fiber with good productivity and low cost, and is not suitable for the spinning process, and compared with anisotropic pitch-based carbon fiber.
- the entanglement between short fibers is relatively good due to the low elastic modulus, but the tensile strength of single fibers is low, and they are brittle against bending or twisting. Not a spun yarn.
- a conventional isotropic pitch-based carbon fiber spun yarn woven fabric is obtained by spinning the staple fiber and weaving the spun yarn in the next step using a low-speed shuttle loom. Since the number of fibers is increased in order to obtain a strong spun yarn capable of weaving, a spun yarn having a large diameter is used. For this reason, there is a problem that the flexibility of the obtained woven fabric is inferior and that the application thereof is limited because it is difficult to form a member having a complicated shape.
- Japanese Patent Application Laid-Open No. 2002-54039 discloses that a reinforcing yarn made of cationic dyeable polyester is spirally wound around the outer periphery of a substantially untwisted fiber bundle.
- a non-twisted yarn is disclosed, in which the description (paragraph 0016) states that “the above-mentioned filament yarn is dissolved in an aqueous alkali solution but not in water. Water-based processes can be freely adopted in the manufacturing process up to the point where it goes up. " However, even with the method described in the related art, the above-mentioned problems in the isotropic pitch-based carbon fiber spun yarn and its woven fabric have not been sufficiently solved.
- the present invention has been made in view of the above-mentioned problems of the related art, and an object (first object) of the present invention is to sufficiently prevent the occurrence of yarn breakage during high-speed weaving and reduce the speed.
- a composite yarn, a woven fabric using an isotropic pitch-based carbon fiber spun yarn which enables weaving, and furthermore, prevents generation of dust at the time of production and improves a working environment, and a method for producing the same. It is in.
- Another object (second object) of the present invention is to sufficiently prevent the occurrence of yarn breakage during high-speed weaving and to enable high-speed weaving, and to prevent the generation of dust during manufacturing. It is an object of the present invention to provide an isotropic pitch-based carbon fiber spun yarn suitable for a raw yarn of an isotropic pitch-based carbon fiber spun yarn woven fabric capable of improving the environment and a method for producing the same.
- the present inventors have conducted intensive studies to achieve the above object, and as a result, when obtaining a composite yarn made of an isotropic pitch-based carbon fiber spun yarn and a woven fabric using the same, the spun yarn was A water-soluble polymer fiber is wrapped around the surface to dissolve and remove the water-soluble polymer fiber after weaving. The inventors have further found that the first object is achieved, and have completed the present invention.
- the present inventors have removed a fine carbon fiber and its aggregate by a specific method from a spun isotropic pitch-based carbon fiber sliver obtained by spinning an isotropic pitch-based carbon fiber sliver, The inventors have found that the second object is achieved by reducing the size and the number of the fine carbon fiber aggregates included in the spun yarn to a predetermined value or less, and have completed the present invention.
- the isotropic pitch-based carbon fiber spun yarn woven fabric of the present invention produces a composite yarn including an isotropic pitch-based carbon fiber spun yarn and a water-soluble polymer fiber wound around the surface of the spun yarn. It is obtained by dissolving and removing the water-soluble polymer fibers from the woven composite yarn fabric.
- the composite yarn of the present invention includes an isotropic pitch-based carbon fiber spun yarn and a water-soluble polymer fiber wound around the surface of the spun yarn.
- the composite yarn further includes a sizing layer formed on the surface of the spun yarn.
- the water-soluble polymer fibers and the sizing agent are dissolved and removed.
- the first water-soluble polymer fiber according to the present invention wherein the first water-soluble polymer fiber is wound around the surface of the spun yarn in a first direction with a gap, and It is preferable that the yarn is made of a second water-soluble polymer fiber wound around the surface of the yarn with a gap formed by twisting in a second direction opposite to the first direction.
- the water-soluble polymer fiber working in the present invention is a water-soluble vinylon fiber.
- the isotropic pitch-based carbon fiber spun yarn used for the woven fabric and the composite yarn of the present invention includes:
- the maximum diameter of the aggregate of fine carbon fibers included in the spun yarn is 3.0 times or less the average diameter of the ground yarn of the spun yarn and the maximum length is 10 mm or less.
- the method for producing a spun carbon fiber spun yarn woven fabric of the present invention comprises the following steps: A step of winding a water-soluble polymer fiber around the surface of an isotropic pitch-based carbon fiber spun yarn to obtain a composite yarn,
- the method for producing a woven fabric of the present invention preferably further comprises a step of applying a sizing solution to the surface of the spun yarn and then drying the sizing yarn to form a sizing layer.
- a sizing solution to the surface of the spun yarn and then drying the sizing yarn to form a sizing layer.
- the water-soluble polymer fibers and the sizing agent are dissolved and removed from the composite yarn fabric.
- the step of obtaining the composite yarn in the method of the present invention includes the steps of: winding a first water-soluble polymer fiber with a gap in the surface of the spun yarn by twisting in a first direction; Preferably, a step of winding a second water-soluble polymer fiber with a gap in the surface of the yarn by twisting in a second direction opposite to the first direction is provided.
- the water-soluble polymer fiber working in the present invention is a water-soluble vinylon fiber.
- the method for producing a woven fabric of the present invention preferably further includes a removing step of removing the isotropic pitch-based carbon fiber spun yarn fine carbon fiber and its aggregate.
- the removing step includes the following steps (a) to (d):
- it is at least one method selected from the group consisting of:
- the maximum diameter of the aggregate of fine carbon fibers included in the spun yarn is 3.0 times or less the average diameter of the ground yarn of the spun yarn. And the maximum length is less than lOmm.
- the maximum diameter included in the spun yarn is 1.5 to 3.0 times the average diameter of the ground yarn of the spun yarn and the maximum length force is about 10 mm. It is more preferable that the existence rate of a certain aggregate of fine carbon fibers is 3/10 m or less.
- the method for producing a spun isotropic pitch-based carbon fiber yarn of the present invention comprises the following steps (a) to (d) from an isotropic pitch-based carbon fiber spun yarn:
- the fine carbon fibers and the aggregate thereof are removed by at least one method selected from the group consisting of a group of fibers, and the maximum diameter of the aggregate of fine carbon fibers contained in the spun yarn is three times the average diameter of the ground yarn of the spun yarn. This is a method to obtain a material whose length is less than 0 times and whose maximum length is less than 1 Omm.
- the obtained isotropic pitch-based carbon fiber spun yarn has a maximum diameter included in the spun yarn that is 1.about.the average diameter of the ground yarn of the spun yarn. It is more preferable that the abundance ratio of the fine carbon fiber aggregate having a ratio of 5 to 3.0 times and a maximum length of 3 to 10 mm is 3/10 m or less.
- FIG. 1 is a schematic side view of an apparatus used for producing a composite yarn for textiles of the present invention.
- FIG. 2 is a schematic side view showing a method for instilling a glue.
- FIG. 3 is a schematic side view showing a method for applying (spray spray) a paste.
- FIG. 4 is a schematic side view showing a method for removing a fine carbon fiber and an aggregate thereof from an air stream.
- FIG. 5 is a schematic side view showing a method for removing fine carbon fibers and aggregates thereof by washing with water and airflow.
- FIG. 6 is a schematic side view showing a method for removing fine carbon fibers and aggregates thereof by washing with ultrasonic waves and air flow.
- the isotropic pitch-based carbon fiber spun yarn of the present invention will be described. That is, in the isotropic pitch-based carbon fiber spun yarn of the present invention, the maximum diameter of the aggregate of fine carbon fibers included in the spun yarn is 3.0 times or less (more preferably) the average diameter of the ground yarn of the spun yarn. Is 2.0 times or less) and the maximum length is 10 mm or less (more preferably 7 mm or less, particularly preferably 5 mm or less).
- dust is increased during weaving, the working environment deteriorates, and the yarn breaks more frequently. Further, if the fine carbon fiber aggregate is large in the woven fabric, the appearance of the woven fabric is deteriorated, and the woven fabric becomes uneven in thickness and weight.
- the maximum diameter included in the spun yarn is 1.5 to 3.0 times the average diameter of the ground yarn of the spun yarn and the maximum length force is about 10 mm. It is more preferable that the existence rate of a certain aggregate of fine carbon fibers is 3/10 m or less.
- Such a fine carbon fiber aggregate is generally called a NEP and mainly Fine carbon fiber debris, fluff, etc. that are entangled in the ground yarn and those that have adhered to the surface of the ground yarn, and those that are clearly recognized as granules and fibers after being made into a woven fabric Includes nodes that are not parallel to the ground thread but are intertwined.
- the values of the size and number of the fine carbon fiber aggregate used are values measured by the following method. That is, the dimension of the fine carbon fiber aggregate in the direction perpendicular to the fiber direction of the spun yarn is measured with a vernier caliper, and the maximum value is defined as the maximum diameter. Also, the size (length) of the fine carbon fiber aggregate in a direction parallel to the fiber direction of the spun yarn is measured with a vernier caliper, and the maximum value is defined as the maximum length. Then, for the spun yarn having a length of 10 m, which is twisted and dried, the number of fine carbon fiber aggregates whose maximum diameter exceeds 3.0 times the average diameter of the ground yarn or whose maximum length exceeds 10 mm is determined. count.
- the thickness (fineness) of the ground yarn of the isotropic pitch-based carbon fiber spun yarn of the present invention is not particularly limited, but the water-soluble polymer fiber may be wound around the surface of the spun yarn as described in detail below. Therefore, it is possible to weave with a high-speed Levia loom for the first time using an isotropic pitch-based carbon fiber spun yarn with a weight per 1000 m (tex) of 890 (8000 denier) or less.
- the thickness of the ground yarn is preferably about 30 tex (270 denier) to about 890 (8000 denier).
- This is a method of removing the fine carbon fibers and the aggregate thereof by at least one method selected from the group consisting of power (removal step) to obtain the above-mentioned spun isotropic pitch-based carbon fiber yarn of the present invention.
- the method for producing an isotropic pitch-based carbon fiber spun yarn subjected to a vigorous removal step is not particularly limited, but for example, according to the method described in JP-A-62-33823.
- a method in which a mat-like isotropic pitch-based carbon fiber is formed and then subjected to the following carding, drawing, and spinning treatments is suitably employed.
- a centrifugal method in which a molten pitch is produced from a nozzle using centrifugal force
- a melt blow method in which the molten pitch is blown out with high-temperature, high-speed air.
- the melt blow method high-temperature and high-speed air is swirled and drawn by the swirling flow, and the air sucker method is used in which fibers are drawn into an air sucker nozzle and drawn, and cotton is collected after the outlet.
- Bundle pitch fibers and mat pitch fibers obtained by any of these methods can also be used.
- a melt spinning method using a centrifugal spinning machine having a horizontal rotation axis is adopted from the viewpoint of production efficiency, and a conveyor belt (with a pitch-based fiber accumulation surface) is used.
- the mat-like pitch fiber deposited on the above is preferably a material having air permeability that can be sucked from the opposite side), and then subjected to infusibilization and heat treatment to carbon fiber by a conventional method.
- Such infusibilization is performed, for example, in an air atmosphere containing an oxidizing gas such as N ⁇ , SO, or ozone.
- an oxidizing gas such as N ⁇ , SO, or ozone.
- the heat treatment is performed in a non-oxidizing atmosphere. It is carried out by calorie heating at 700-3000 ° C, preferably 900-2,500 ° C. This heat treatment may be performed before the spun yarn or after the spun yarn.
- the heat treatment at 700 to 1000 ° C. is performed in the state of the mat, and the heat treatment at a higher temperature is performed by heating the mat-like isotropic pitch-based carbon fiber subjected to the heat treatment at 700 to 1000 ° C. It is performed in the state of sliver obtained by carding.
- the dimensions of the isotropic pitch-based carbon fiber mat thus heat-treated at 700 1000 ° C are, for example, as follows. 20 zm, weight 0.1-0.6 kg / m 2 , thickness 5 30 mm, width 100 850 mm, length 100 m or more.If necessary, roll up and store in a roll for the next carding process. You may, or you may fold and save.
- the isotropic pitch-based carbon fiber mat formed on the conveyor belt as described above is finely adjusted in thickness and width by passing it between a pair of rollers as necessary, and then carded. We are good at processing.
- a carding machine As a carding machine, a carding machine (wide band gil) which has been broadly improved for treating a mat-like isotropic pitch-based carbon fiber is preferably employed, and its basic structure is isotropic pitch-based carbon fiber. Between the back roller and the front roller arranged in the direction of travel of the mat, an oil spraying device and a foraer in which a number of pairs of metal needle rows are arranged above and below the mat are arranged.
- an oil agent to facilitate the carding process while being sent from the back roller to the front roller is, for example, 1.8 to 2.
- the isotropic pitch-based carbon fiber that has undergone drawing and carding in a carding machine and has exited the front roller is a sliver having an improved fiber direction arrangement, and is separated as necessary. After that, it is wound into a coiler in a cylindrical shape.
- the obtained isotropic pitch-based carbon fiber sliver is subjected to a drawing treatment by a drawing machine (drawing while drafting a plurality of slivers (drafting) to obtain fiber alignment and uniformity. It is subjected to a process of obtaining a sliver with further improved properties.
- a roughly wound sliver extracted from a coiler is joined together in a process of being sent along a double-strength sliver, a tall guide, and a sliver guide, and is stretched between a knock roller and a front roller. After being re-carded by the fora, the sliver with improved alignment is sent to the product case.
- the above-mentioned drawing treatment is carried out by a plurality of processes. Is done many times.
- the isotropic pitch-based carbon fiber sliver having a thickness and fiber arrangement suitable for spinning is drawn and twisted (primary twist) by a spinning machine (ring spinning machine). Twisted yarn (single yarn) is obtained and wound on a bobbin.
- the obtained single-twisted yarn (single yarn) is twisted and twisted (secondarily twisted) by a twisting machine, as necessary, to obtain a friable twisted yarn (double yarn).
- the isotropic pitch-based carbon fiber spun yarn can be used as either a single twisted yarn (single yarn) or a stranded twisted yarn (double yarn).
- the isotropic pitch-based carbon fiber spun yarn is selected from the group consisting of the above (a) to (d) from the above-described spun isotropic pitch-based carbon fiber yarn. Fine carbon fibers and their aggregates are removed by at least one method.
- the peripheral speed is not less than the speed at which the spun yarn 10 is pulled out by being partially immersed in the aqueous paste solution 16. Then, a method of bringing the spun yarn into contact with the upper surface of the touch roller 18 rotating in the same direction as the traveling direction of the spun yarn 10 may be used.
- the isotropic pitch-based carbon fiber spun yarn 10 is impregnated by impregnating (dub-soaking) the aqueous solution of the sizing agent to impregnate the aqueous solution of the sizing agent, the excess aqueous solution of the sizing agent is squeezed.
- the fluff of the spun yarn 10 and the fine carbon fibers contained in the spun yarn adhere to the surface of the spun yarn or accumulate in the contact portion with the guide or the roller to form a lump.
- the portion becomes a fine carbon fiber aggregate or the fluff of the spun yarn 10 and the fine carbon adhering to the surface of the spun yarn 10
- the fibers tend to fall off, clump together in the liquid and reattach to the surface of the spun yarn 10, forming a fine carbon fiber aggregate of the spun yarn 10. Therefore, it is preferable that the isotropic pitch-based carbon fiber spun yarn 10 is brought into contact with the sizing aqueous solution formed on the surface of the roller 18 above the sizing aqueous solution surface to impregnate the sizing aqueous solution. .
- the peripheral speed of the touch roller 18 When the peripheral speed of the touch roller 18 is set to a speed lower than the speed at which the isotropic pitch-based carbon fiber spun yarn 10 is pulled out, the peripheral surface of the spun yarn 10 and the fluff of the spun yarn 10 or the surface The fine carbon fibers contained therein accumulate between the spun yarn 10 and the touch roller 18 to gradually form a lump, and the lump is transported to the next process while digging into the surface of the spun yarn 10 to remove the lump. Tend to be fine carbon fiber aggregates. Therefore, in order to remove the fine carbon fibers adhered to or contained in the surface of the spun yarn 10, the peripheral speed of the tatuchi roller 18 needs to be higher than the speed at which the spun yarn 10 is drawn out. It is.
- the peripheral speed of the touch roller 18 is preferably about 200 m / sec, and the feed speed of the spun yarn 10 is preferably about 110 m / sec.
- a method of blowing compressed air from a nozzle (air flush) 51 to the spun yarn 10 as shown in FIG. 4 can be mentioned.
- the linear velocity of such air is preferably about 10 to 40 m / sec, and the feed speed of the spun yarn 10 is preferably about 1 to 50 m / sec.
- the method (c) for example, as shown in Fig. 5, after the spun yarn 10 is immersed in the water tank 52, the compressed air is blown from the nozzle 51 as necessary, and then the drier 42 is used. Drying method may be mentioned.
- the residence time in the water tank is preferably about 5 to 30 seconds, and the feed speed of the spun yarn 10 is preferably about 1 to 50 mZ seconds.
- the spun yarn 10 is irradiated with ultrasonic waves from the ultrasonic generator 53 while dipping into the water tank 52, A method of drying with a dryer 42 after wiping the compressed air may be mentioned.
- the frequency of the ultrasonic wave is preferably about 28 to 170 kHz
- the residence time in the water tank is preferably about 530 seconds.
- the feed speed of the spun yarn 10 is preferably about 50 m / sec.
- the isotropic pitch system according to the above-described present invention in which the size of the fine carbon fiber aggregate is limited by removing the fine carbon fiber and the aggregate thereof by the above-described removal step.
- carbon fiber spun yarn can be obtained.
- the isotropic pitch-based carbon fiber spun yarn of the present invention thus obtained cannot be woven at high speed as it is, and a water-soluble polymer fiber is coated on the surface of the isotropic pitch-based carbon fiber spun yarn. It must be wound to form a composite yarn as described in detail below.
- the composite yarn of the present invention includes an isotropic pitch-based carbon fiber spun yarn and a water-soluble polymer fiber wound around the surface of the spun yarn.
- the cohesive force between the fibers is improved while maintaining the flexibility of the fiber, and the strength of the composite yarn is accordingly increased. Improved and less fuzzy. Therefore, when the composite yarn of the present invention is used, weaving can be performed without an emergency stop of the high-speed loom that does not cause yarn breakage during high-speed weaving, and furthermore, generation of dust during weaving is sufficiently prevented.
- the above-described isotropic pitch-based carbon fiber spun yarn of the present invention is preferable to use as the spun yarn. Since the size is small and the number thereof is small, the woven fabric is excellent in appearance, and has little unevenness in weight and thickness.
- the isotropic pitch-based carbon fiber spun yarn as described above, a water-soluble polymer fiber can be easily and uniformly wound thereon, and a guide It does not shift even when rubbed with a roller.
- the present inventors presume that this is due to a synergistic effect between the surface properties of the isotropic pitch-based carbon fiber and the appropriate fluffing of the spun yarn surface.
- the water-soluble polymer fiber according to the present invention is not particularly limited as long as it can improve the strength of the spun yarn during weaving and can be dissolved and removed after weaving. Fibers are particularly preferred.
- the thickness (fineness) of the water-soluble polymer fiber according to the present invention is not particularly limited. Odtex is preferred.
- the water-soluble polymer fibers that work in the present invention may be multifilaments, monofilaments or spun yarns, or may be misaligned.
- the number of windings of the water-soluble polymer fiber per m of the spun yarn is usually 80 to 300, preferably f to 200 to 2500, and more preferably 500 to 1800.
- the first water-soluble polymer fiber wound around the surface of the spun yarn with a gap in a first direction twisting It is preferable that the surface of the spun yarn is provided with a second water-soluble polymer fiber wound around the surface in a second direction opposite to the first direction with a gap therebetween.
- the composite yarn obtained by using such a water-soluble polymer fiber has a small knot due to the aggregate of fine carbon fibers and a small tensile strength. The deformation is eliminated, the flexibility is maintained when the bobbin is pulled out, and the shape becomes almost straight.
- the number of windings of the first and second water-soluble polymer fibers per m of the spun yarn is usually 80 to 3000 times, preferably 200 to 2500 times, and more preferably 500 to 18 times. 00 times.
- the obtained composite yarn becomes hard, and the Tends to be worse. Therefore, when winding the water-soluble polymer fiber, it is preferable to form a gap so that the obtained composite yarn has flexibility and does not hinder the subsequent weaving.
- a sizing layer formed on the surface of the spun yarn.
- fluffing of the spun yarn is further suppressed as compared with the case where no glue layer is interposed, and The generation of dust from the isotropic pitch-based carbon fiber can be suppressed more reliably, the generation of static electricity is prevented, and the smoothness and flexibility of the obtained woven fabric Tend to be more improved.
- composition of the aqueous sizing solution used to obtain such a sizing agent layer is as follows: Polyvinyl Arco mono-soluble aqueous solution, night, methinoresenorelose aqueous solution, etinoresenolerose aqueous solution, methinoleetino Resinolerose aqueous solution, polyacrylamide aqueous solution, starch aqueous solution and the like.
- the amount of such a paste applied to the spun yarn is not particularly limited, but is preferably about 0.110 parts by mass (in terms of solid content) per 100 parts by mass of the spun yarn.
- the water-soluble polymer fiber is wound around the surface of the isotropic pitch-based carbon fiber spun yarn to obtain a composite yarn.
- the specific method of winding the water-soluble polymer fiber around the surface of the spun yarn is not particularly limited, it is preferably performed using, for example, an apparatus shown in FIG.
- FIG. 1 shows a preferred example of an apparatus used for producing the composite yarn of the present invention.
- the isotropic pitch-based carbon fiber spun yarn 10 wound on the cheese 12 is placed on a pair of unwind rollers 11 and unwound.
- the sizing tank 14 is filled with an aqueous sizing solution 16, and the spun yarn 10 drawn from the cheese 12 is partially immersed in the aqueous sizing solution 16 and rotated to rotate the upper surface of the touch roller 18. Therefore, the surface of the spun yarn 10 is impregnated with an aqueous sizing agent solution (touch roller method).
- a drip method as shown in FIG. 2 or a spraying method as shown in FIG. Spray method or a method combining two or more of these methods can be used, but the touch roller method is particularly preferable because the aqueous paste solution can be more uniformly and easily impregnated.
- reference numeral 61 denotes a paste tank
- 62 denotes a dripping amount adjusting valve
- 63 denotes a paste aqueous solution collector.
- reference numeral 61 denotes a paste tank
- 63 denotes a paste aqueous solution collector
- 64 denotes a pump
- 65 denotes a spray amount adjusting valve
- 66 denotes a spray nozzle.
- the impregnation of the aqueous solution of sizing agent by the spray method (spray method) and the drip method should be performed beforehand by using an isotropic pitch-based carbon fiber spun yarn. It is preferable to remove the fine carbon fibers and the aggregates thereof by the above-described method and to dry them.
- the spun yarn 10 impregnated with the aqueous sizing agent is drawn into the drying device 42 and impregnated into the spun yarn 10 while passing through the drying device 42.
- the water in the aqueous paste solution is removed.
- the tension roller 22 is composed of a pair of drive rollers 22a, 22a arranged side by side at a predetermined interval, and a weight roller 22b placed thereon.
- a first winding device 24 and a second winding device 26 are installed in series, and the isotropic pitch-based carbon fiber spun yarn 10 pulled out from the tension roller 22 is provided. Penetrates.
- Each of the first winding device 24 and the second winding device 26 includes a snail wire 28, a spindle 30, and a spindle drive motor 32.
- the tip of the snell wire 28 is processed into a spiral shape, and the spun yarn 10 passes through the center of the formed circular space.
- a bobbin 36 on which a water-soluble polymer fiber 34 is wound is fitted on the spindle 30, and the water-soluble polymer fiber pulled out from the bobbin 36 is rotated because the spindle 30 rotates at a desired rotation speed.
- 34 rotates around the inner periphery of the circular space of the snail wire 28 and is wound around the spun yarn 10 passing through the center of the circular space. Since the configuration of the first winding device 24 and the second winding device 26 is the same, the operation is exactly the same except for the direction of winding.
- At least one of the first winding device 24 and the second winding device 26 causes the water-soluble polymer fiber to be coated on the surface of the isotropic pitch-based carbon fiber spun yarn 10 Wound on top.
- the first water-soluble polymer fiber 34 is wound in the right or left winding direction by the first winding device 24, and the second water is wound by the second winding device 26.
- the second water-soluble polymer fiber 20 is wound in the winding direction opposite to that of the first water-soluble polymer fiber 34. If necessary, a water-soluble polymer fiber may be further wound thereon. It is preferable that the number of times of winding the first water-soluble polymer fiber 34 and the second water-soluble polymer fiber 20 is the same, from the viewpoint of eliminating the habit due to the winding direction.
- the composite yarn 10 'in which a water-soluble polymer fiber is wound around the surface of an isotropic pitch-based carbon fiber spun yarn passes through the upper tension roller 23, contacts the take-up roller 38, and rotates. It is wound on a wooden tube 40.
- the isotropic pitch-based carbon fiber spun yarn fabric of the present invention and a method for producing the same will be described. That is, the isotropic pitch-based carbon fiber spun yarn woven fabric of the present invention is obtained by dissolving and removing the water-soluble polymer fibers from a conjugate yarn woven by weaving the conjugate yarn of the present invention.
- the method for producing an isotropic pitch-based carbon fiber spun yarn woven fabric of the present invention includes the step of obtaining the above-described composite yarn,
- a step of forming a sizing layer by applying a sizing aqueous solution to the surface of the spun yarn and then drying it is performed.
- the water-soluble polymer fiber and the paste are dissolved and removed from the obtained composite yarn fabric.
- a specific method of weaving the composite yarn is not particularly limited, and examples thereof include a method of weaving the composite yarn at a high speed using a Levia loom or a Sulza loom.
- a specific method for dissolving and removing the water-soluble polymer fiber (or the water-soluble polymer fiber and the paste) from the composite yarn fabric is not particularly limited, either.
- the isotropic pitch-based carbon fiber force is substantially reduced, the fine carbon fiber aggregate is reduced, the appearance is improved, the thickness unevenness and the weight are reduced, and the isotropic pitch-based carbon fiber of the present invention is reduced.
- a carbon fiber spun yarn woven fabric can be obtained.
- the weave form of the isotropic pitch-based carbon fiber spun yarn woven fabric of the present invention is not particularly limited, and may be plain weave, twill weave, satin weave, basket weave, or the like. Can do.
- “consisting substantially of isotropic pitch-based carbon fiber” means that it is composed of 98% by mass or more of isotropic pitch-based carbon fiber. Is an isotropic pitch-based carbon fiber spun yarn woven fabric
- test pieces each having a width of about 55 mm and a length of about 250 mm were taken from the warp direction and the weft direction.
- a tensile tester Orientec Co., Ltd., “Tensilon Universal Tester Model 1310”
- the gripping interval was set to 150 mm
- the yarn was removed from both sides in the width direction
- the width was set to 50 mm
- the tensile speed was set to 200 mmZmin.
- Tensile and maximum tensile strength (N) were measured. The average value of each of the five measured values in the warp direction and the weft direction was determined.
- This pitch is used for two horizontal centrifugal spinning machines with a diameter of 0.7 mm, a hole diameter of 420 and a ball diameter of 200 mm (array is parallel to the conveyor). Melt spinning was performed at a processing amount, a rotation speed of 800 rpm and a drawing wind of 100 m / sec. Cutty by cutter Using a 40-mesh wire mesh belt reciprocating at a rate of 5 times per minute in a direction perpendicular to the direction of travel. The traveling speed of the mat is 700 mm on a belt conveyor with a traveling speed of 51 m / min.
- the remainder is heated to 100 250 ° C in 3 hours by flowing 0.5 mZsec (as superficial velocity) of circulating gas in the furnace in a direction perpendicular to the orientation of the mat under air atmosphere while removing the reaction heat. And made it infusible.
- the mat is processed while suspended under its own weight.
- the total length is 14.8m (including the cooling section).
- the temperature is raised to 1000 ° C in 20 minutes in a vertical firing furnace with a width of 2m and fired to 200 ° C. After cooling, it was sent out of the furnace.
- the carbon fiber thus obtained at a heat treatment temperature of 1000 ° C has a short fiber property at which fusion between the fibers does not occur, and has a fiber diameter of 14.5 ⁇ m, a tensile strength of 800 MPa, and a tensile modulus of 35 GPa. It was. (2.3% elongation)
- An isotropic pitch carbon fiber mat with a width of 700 mm, a thickness of 20 mm, and 1.98 million deniers is transferred to a carding machine, and an oil agent for spinning carbon fibers between a front roller and a back roller (made by Takemoto Yushi Co., Ltd.) “RW-102”) was sprayed, spread 2% by mass with respect to the carbon fiber, and while being stretched 10.0 times, the fibers were aligned to obtain a sliver of 198,000 denier.
- the two slivers were combined and stretched 3.9 times using the first drawing machine to form one sliver, and the two slivers were combined and further stretched 10 times using the second drawing machine.
- One sliver, and the two slivers are combined and stretched 3.0 times with a third drawing machine to form one sliver, and the two slivers are combined to form a fourth drawing machine. Then, it was stretched to 3.0 times to obtain one sliver of 90000 denier.
- One of the slivers was stretched to 12.0 times using a spinning machine, and spun at a Z (left) twist number of 300 turns / m to obtain a spun yarn of 750 denier. Then twist The two spun yarns were combined by a yarn machine and combined at a twist of 180 turns / m to obtain a spun yarn of 1500 denier.
- the tensile strength was 30N and the elongation was 3.0%.
- the sliver obtained by carding with the carding machine of Reference Example 1 was heat-treated at 2,000 ° C for 1 hour in a nitrogen atmosphere to obtain a sliver of 198,000 denier, and then two slivers were drawn by the first drawing machine. 3.9 times to make one sliver, and then combine the two slivers and draw 10 times with the second drawing machine to make one sliver. The two are combined and stretched 3.0 times with a third drawing machine to form one sliver, and the two slivers are combined and stretched 3.0 times with a fourth drawing machine to form one sliver The 9000 denier Got a sliver.
- One sliver was stretched 2.0 times using a spinning machine and spun at a Z (left) twist number of 90 turns / m to obtain a spun yarn of 4500 denier.
- the tensile strength was 78N and the elongation was 2.6%.
- the isotropic pitch-based carbon fiber spun yarn having a heat treatment temperature of 1000 ° C, 1500 denier and 180 twists Zm described in Reference Example 1 was used as a test material. And set on a yarn supply roller 11 as shown in FIG.
- the isotropic pitch-based carbon fiber spun yarn 10 pulled out from the cheese 12 is immersed in the lower half of the glue tank 14 to draw out the isotropic pitch-based carbon fiber spun yarn.
- the paste was brought into contact with the upper part of the paste 18 and pulled out, and the paste aqueous solution 16 in the paste tank 14 was impregnated with the surface force, and dried at a simple temperature of 130 ° C. to form a paste layer.
- the isotropic pitch-based carbon fiber spun yarn 10 on which the paste layer was formed was wound around a tension roller 22. There was no fine carbon fiber aggregate in which the isotropic pitch-based carbon fiber spun yarn 10 on which the wound paste layer was formed had the maximum diameter exceeding 3 times the ground yarn or the maximum length exceeding 10 mm.
- the paste used was composed of 85% by weight of Polyvier alcohol (Kuraray “Kuraray Povar # 218”), 5% by weight of acrylic resin (“Phosize # 663” by Yoyo Kagaku Kogyo), and a penetrant (Sanyo). The content was 2% by mass of “Sammorin # 11” manufactured by Kasei, 6% by mass of wax-based oil (“Maconol # 222” manufactured by Matsumoto Yushi), and 2% by mass of water.
- the isotropic pitch-based carbon fiber spun yarn 10 drawn from the tension roller 22 is passed through the first winding device 24 and the second winding device 26, and the first winding device 24
- a bobbin 36 around which a water-soluble vinylon fiber (Nichibi's “Sorblon SF type, 84T / 24F”) 34 has been wound is fitted to 30 and the spindle 30 is rotated at a desired number of revolutions.
- the water-soluble vinylon fiber 34 was wound around the isotropic pitch-based carbon fiber spun yarn 10 with a desired winding number with a gap between the water-soluble vinylon fibers 34.
- the presence of the water-soluble vinylon fiber 34 strengthened the binding properties of the yarn, such as the thickness strength, and drastically improved the friction resistance.
- the water-soluble vinylon fiber 34 in the winding direction opposite to that of the first winding device 24 is attached to the passing isotropic pitch-based carbon fiber spun yarn 10 by the water-soluble vinylon fiber. It was wound with a gap between each other.
- the number of windings of the first water-soluble vinylon fiber 34 wound around the isotropic pitch-based carbon fiber spun yarn 10 by the first winding device 24 is 800 times Zm
- the number of turns of the second water-soluble vinylon fiber 34 wound around the isotropic pitch-based carbon fiber spun yarn 10 was 800 turns / m.
- Table 1 shows the measurement results of the number of wound water-soluble vinylon fibers and the tenacity of the test material and the carbon fiber for fabric “vinylon fiber composite yarn” of this example.
- the carbon fiber for fabric "vinylon fiber composite yarn” was woven at 180 revolutions / minute using a Levia loom. Then, after dissolving and removing the water-soluble vinylon fiber from the obtained woven fabric in a bath containing 100 ° C boiling water so that the bath ratio with the woven fabric is 1: 100, the woven fabric has a bath ratio of 1: 100. Wash in a bath filled with water at 20 ° C to 100, and furthermore, enzymatic desizing agent at 20 ° C, 0.05% by mass at 20 ° C so that the fabric and bath specificity Sl: 100.
- the firing temperature described in Reference Example 1 of Example 1 is 1000 ° C, 1500 denier, the number of twists is 180 turns / m.
- the firing temperature described in Reference Example 2 is 2000 ° C.
- the same procedure as in Example 1 was carried out except that an isotropic pitch-based carbon fiber spun yarn having a density of 1500 denier and a twist of 180 turns / m was used.
- the sintering temperature described in Reference Example 1 of Example 1 was replaced with the sintering temperature described in Reference Example 1 at 1000 ° C, 1500 denier, and a twist of 180 turns / m, instead of the isotropic pitch-based carbon fiber spun yarn.
- the firing temperature described in Reference Example 1 of Example 1 was changed to 1000 ° C, the firing temperature described in Reference Example 4 was changed to 1,500 denier, and the number of twists was 180 turns / m.
- Example 1 The sintering temperature described in Reference Example 1 of Example 1 was replaced by the sintering temperature described in Reference Example 5, 2000 ° C, instead of the isotropic pitch-based carbon fiber spun yarn having a firing temperature of 1000 ° C, 1500 denier, and a twist of 180 turns / m.
- Example 4 was carried out in the same manner as in Example 1 except that a spun isotropic pitch-based carbon fiber yarn having a denier of 4,500 and a twist of 90 turns / m was used.
- a spun isotropic pitch-based carbon fiber spun yarn having a sizing layer formed without a fine carbon fiber aggregate having a maximum diameter exceeding 3 times the ground yarn or a maximum length exceeding 10mm was obtained. Further, a plain-woven isotropic pitch-based carbon fiber spun yarn woven fabric was obtained. Table 1 shows their physical properties. The amount of dust during weaving was very low.
- the firing temperature described in Reference Example 1 of Example 1 is 1000 ° C, 1500 denier, the number of twists is 180 turns / m.
- the firing temperature described in Reference Example 2 is 2000 ° C. , 1500 denier, 180 twists / m twisted isotropic pitch-based carbon fiber spun yarn, and the method for impregnating the aqueous paste solution described in Example 1 was used.
- the touch roller 18 which rotates at the same peripheral speed as the speed (V: 30 mZ)
- An air stream having a linear velocity of 20 mZ seconds was blown onto the spun isotropic pitch-based carbon fiber spun yarn 10 to remove fine carbon fibers.
- the spun yarn was sprayed with a sizing solution V, and then dried at a drying temperature of 130 ° C.
- a sizing solution V a sizing solution
- a plain-woven isotropic pitch-based carbon fiber spun yarn woven fabric was obtained. Table 1 shows their physical properties. The amount of dust during weaving was very small.
- the firing temperature described in Reference Example 1 of Example 1 is 1000 ° C, 1500 denier, the number of twists is 180 turns / m.
- the firing temperature described in Reference Example 2 is 2000 ° C. , 1500 denier, 180 twists / m twisted isotropic pitch-based carbon fiber spun yarn, and the method for impregnating the aqueous paste solution described in Example 1 was used.
- the drawn isotropic pitch-based carbon fiber spun yarn 10 was immersed in water in place of the touch roller 18 rotating at the same peripheral speed as the speed (V: 15 mZ, residence time in the water tank: 10).
- the firing temperature described in Reference Example 1 of Example 1 is 1000 ° C, 1500 denier, the number of twists is 180 turns / m.
- the firing temperature described in Reference Example 2 is 2000 ° C. , 1500 denier, 180 twists / m twisted isotropic pitch-based carbon fiber spun yarn, and the method for impregnating the aqueous paste solution described in Example 1 was used.
- the touch roller 18 rotating at the same peripheral speed as the speed, the drawn isotropic pitch-based carbon fiber spun yarn 10 was immersed in water while applying ultrasonic waves (V: 15 m / min, water
- Example 2 Dwell time in the tank: 10 seconds, ultrasonic frequency 40kHz * Output 300W), draw out into the air, blow air flow (linear velocity: 20m / min) to remove excess water, and then dry at 130 ° C.
- the procedure was the same as in Example 1, except that the spun yarn was sprayed with an aqueous sizing solution using a spray and dried to form a sizing layer.
- the firing temperature described in Reference Example 1 of Example 1 is 1000 ° C, 1500 denier, the number of twists is 180 turns / m.
- the firing temperature described in Reference Example 2 is 2000 ° C. , 1500 denier, 180 twists / m twisted isotropic pitch-based carbon fiber spun yarn, and the method for impregnating a sizing agent aqueous solution described in Example 1 was used.
- the touch roller 18 rotating at the same peripheral speed as the speed of 0, the drawn isotropic pitch-based carbon fiber spun yarn 10 was immersed in water while applying ultrasonic waves (V: 15 m / min, water
- the firing temperature described in Reference Example 1 of Example 1 is 1000 ° C, 1500 denier, the number of twists is 180 turns / m.
- the firing temperature described in Reference Example 2 is 2000 ° C. , 1500 denier, 180 twists / m twisted isotropic pitch-based carbon fiber spun yarn, and the method of impregnating the aqueous solution of the sizing agent with ⁇ Instead of the touch roller 18 that rotates at the same peripheral speed as the speed of the yarn 10 (V: 30 m / min), pull
- a peripheral speed of 2.0 times the speed of the isotropic pitch-based carbon fiber spun yarn 10 (V: 60m /
- the firing temperature described in Reference Example 1 of Example 1 is 1000 ° C, 1500 denier, the number of twists is 180 turns / m.
- the firing temperature described in Reference Example 2 is 2000 ° C. , 1500 denier, 180 twists / m twisted isotropic pitch-based carbon fiber spun yarn, glue water
- the method of impregnating the solution was changed to the touch roller 18 rotating at the same peripheral speed as the speed (V: 30 m / min) of the spun isotropic pitch-based carbon fiber spun yarn 10 described in Example 1 (V: 30 m / min). ,pull
- the firing temperature described in Reference Example 1 of Example 1 is 1000 ° C, 1500 denier, in place of the isotropic pitch-based carbon fiber spun yarn having a twist of 180 turns / m
- the firing temperature described in Reference Example 2 is 2000 ° C. C, 1500 denier, and isotropic pitch-based carbon fiber spun yarn of 180 times / m twist
- a sizing agent poly Biel alcohol manufactured by Kuraray "Kuraray Poval # 217
- the procedure was performed in the same manner as in Example 1 except that the solution was changed to an aqueous solution.
- the firing temperature described in Reference Example 1 of Example 1 is 1000 ° C, 1500 denier, the number of twists is 180 turns / m.
- the firing temperature described in Reference Example 2 is 2000 ° C. , 1500 denier, 180 twists / m of isotropic pitch-based carbon fiber spun yarn, 800 turns / m of the first water-soluble vinylon fiber, 800 turns / m of the second water-soluble vinylon fiber was performed in the same manner as in Example 1 except that the number of windings was changed to 200 times Zm and 200 times Zm, respectively.
- the firing temperature described in Reference Example 1 of Example 1 is 1000 ° C, 1500 denier, the number of twists is 180 turns / m.
- the firing temperature described in Reference Example 2 is 2000 ° C. , 1500 denier, 180 twists / m isotropic pitch-based carbon fiber spun yarn, 800 turns / m of the first water-soluble vinylon fiber, 800 turns of the second water-soluble vinylon fiber Example 1 was repeated except that the number of windings was changed to 1800 turns / m and 1800 turns / m in place of the turn Zm.
- the firing temperature described in Reference Example 1 of Example 1 is 1000 ° C, 1500 denier, the number of twists is 180 turns / m.
- the firing temperature described in Reference Example 2 is 2000 ° C.
- the same procedure as in Example 1 was carried out except that the isotropic pitch-based carbon fiber spun yarn having a density of 1500 denier and a twist of 180 turns / m was wound around the second water-soluble vinylon fiber.
- the sintering temperature described in Reference Example 1 of Example 1 is 1000 ° C, 1500 denier, twist number 180 times / m isotropic pitch-based carbon fiber spun yarn having a firing temperature of 2,000 ° C, 1500 denier and a twist of 180 turns / m described in Reference Example 2 instead of the isotropic pitch-based carbon fiber spun yarn described in Reference Example 2.
- the number of windings of the water-soluble vinylon fiber is 800 times / m and the number of windings of the second water-soluble vinylon fiber is 800 times / m.
- the procedure was the same as in Example 1, except that the second water-soluble vinylon fiber was not wound.
- the firing temperature described in Reference Example 1 of Example 1 is 1000 ° C, 1500 denier, the number of twists is 180 turns / m.
- the firing temperature described in Reference Example 2 is 2000 ° C. , 1500 denier, 180 twists / m twisted isotropic pitch-based carbon fiber spun yarn, and the method of impregnating the aqueous solution of the sizing agent with ⁇
- the drawn isotropic pitch-based carbon fiber spun yarn 10 is immersed in an aqueous sizing solution and then drawn out into the air to guide it.
- the same procedure as in Example 1 was carried out, except that an excess aqueous solution of the sizing agent was removed by contact with, and dried in the next step to form a sizing layer.
- the sintering temperature described in Reference Example 1 of Example 1 is 1000 ° C, 1500 denier, twist number 180 times / m isotropic pitch-based carbon fiber spun yarn described in Reference Example 2 instead of the isotropic pitch-based carbon fiber spun yarn having a sintering temperature of 2000 ° C, 1500 denier, and a twist of 180 turns / m.
- the method of impregnating the aqueous solution was the same as that of Example 1 except that ⁇ was used instead of the touch roller 18 rotating at the same peripheral speed as the speed of the sputtered isotropic pitch-based carbon fiber spun yarn 10.
- the isotropic pitch-based carbon fiber spun yarn of 2,000 ° C, 1500 denier, 180 twists / m twist described in Reference Example 2 was not impregnated with the aqueous sizing agent solution, and was not wound with water-soluble vinylon fiber. Using a Revere loom, plain weaving was attempted at 180 rpm.
- This isotropic pitch-based carbon fiber spun yarn had a maximum diameter exceeding 3 times the ground yarn or a maximum length of more than 10mm of fine carbon fiber aggregates of several tenths per 10m. Since there is no glue layer on the composite yarn, the fluff is liable to be generated, and the fluff is crushed at the time of weaving. It was more / hour. Further, since the tensile strength of the spun yarn was as low as 27 N, yarn breakage occurred frequently (5 times or more per hour), and it was difficult to weave a woven fabric.
- a sintering temperature of 1000 ° C, 1500 denier, 180 twists Zm as described in Reference Example 1 of Example 1 is used.
- the isotropic pitch-based carbon fiber spun yarn is rotated at a peripheral speed (V: 15 m / min) that is half the speed of 10
- the number of fine carbon fiber aggregates having a maximum diameter exceeding 3 times the ground yarn or a maximum length exceeding 10mm was 2 / 10m, and an isotropic pitch-based carbon formed with a sizing layer of 10m was formed.
- Fiber spun yarn was obtained.
- an isotropic pitch-based carbon fiber / water-soluble vinylon fiber composite yarn is obtained.
- an isotropic pitch of 1000 ° C, 1500 denier, and 180 twists / m as described in Reference Example 1 of Example 1 is used.
- an isotropic pitch-based spun carbon fiber spun yarn with a sintering temperature of 2000 ° C, 1500 denier and a twist of 180 turns / m described in Reference Example 2 was used, and the method of impregnation with the aqueous paste agent was performed.
- the touch roller 18 rotating at the same peripheral speed as the speed (V: 30 m / min) of the drawn isotropic pitch-based carbon fiber spun yarn 10 described in Example 1, the drawn yarn is drawn.
- the number of fine carbon fiber aggregates having a maximum diameter exceeding 3 times the ground yarn or a maximum length exceeding 10mm was 3 / 10m, and an isotropic pitch-based carbon having a sizing layer of 10m was formed.
- Fiber spun yarn was obtained.
- Example 1 until an isotropic pitch-based carbon fiber / water-soluble vinylon fiber composite yarn was obtained.
- the sintering temperature of 2000 ° C and 1500 denier described in Reference Example 2 was used.
- the isotropic pitch-based carbon fiber spun yarn having a twist of 180 turns / m was used, and the method of impregnating the aqueous paste solution with the speed of the drawn-out isotropic pitch-based carbon fiber spun yarn 10 described in Example 1 (V : 30m / min) instead of the touch roller 18 rotating at the same peripheral speed as
- the firing temperature described in Reference Example 1 of Example 1 was changed to the firing temperature of 1000 ° C, 1500 denier, the number of twists was 180 turns / m. , 1500 denier, 180 twists / m twisted isotropic pitch-based carbon fiber spun yarn, and the method of impregnating the aqueous solution of the sizing agent with ⁇
- the drawn isotropic pitch-based carbon fiber spun yarn 10 is immersed in an aqueous sizing solution and then drawn out into the air to guide it.
- the number of windings of the first water-soluble vinylon fiber 800 times Zm the number of windings of the second water-soluble vinylon fiber Instead of 800 times Zm, the number of windings of the first water-soluble vinylon fiber is 4000 times / m, and The operation was performed in the same manner as in Example 1 except that the winding was performed without any gap and the second water-soluble vinylon fiber was not wound.
- the number of fine carbon fiber aggregates having a maximum diameter exceeding 3 times the ground yarn or a maximum length exceeding 10mm was 2 / 10m, and an isotropic pitch-based carbon formed with a sizing layer of 10m was formed.
- Fiber spun yarn was obtained.
- the obtained carbon fiber for textiles' vinylon fiber composite yarn is We tried to weave plain at 180 rpm. Table 1 shows their physical properties. The dust during weaving is very small. The yarn breakage has not occurred. The loom has not been shut down immediately, but there has been a place where carbon fiber spun yarn has been cut in the woven fabric after removing the paste and water-soluble vinylon fibers.
- the isotropic pitch-based carbon fiber spun yarn obtained in Reference Example 1 was treated by a method of blowing only air flow as shown in Fig. 4 to remove fine carbon fibers attached to the surface of the carbon fiber spun yarn. .
- the feed speed of the spun yarn was set to 30 mZ, and the linear velocity of the air flow was set to 20 mZ seconds.
- the isotropic pitch-based carbon fiber spun yarn obtained in Reference Example 1 was treated by a method of washing with water, spraying airflow, and then drying, as shown in FIG. 5, to obtain fine particles adhered to the surface of the carbon fiber spun yarn.
- the broken carbon fibers were removed.
- the feed speed of the spun yarn was set at 15 m / min
- the residence time in the water tank was 10 seconds
- the linear velocity of the air flow was 20 m / s
- the drying temperature was 130 ° C.
- the strength and weight of the isotropic pitch-based carbon fiber spun yarn before and after these pretreatments were measured, and the weight reduction rate was calculated by the following equation. The results are shown in Table 2 together with the strength.
- Weight loss rate ⁇ (W -W) / W ⁇ X 100 (% by mass) ⁇ ⁇ ⁇ ⁇ (2)
- the isotropic pitch-based carbon fiber spun yarn obtained in Reference Example 1 was washed with water while applying ultrasonic waves, and then treated by a method of drying by blowing an air stream and drying.
- the fine carbon fibers attached to the surface of were removed.
- the feed speed of the spun yarn was set at 15 mZ
- the residence time in the water tank was 10 seconds (long-wave frequency 40 kHz, output 300 W)
- the linear velocity of the air flow was 20 m / s
- the drying temperature was 130 ° C.
- the strength and weight of the isotropic pitch-based carbon fiber spun yarn before and after these pretreatments were measured, and the weight reduction rate was calculated by the following formula. The results are shown in Table 2 together with the strength.
- Weight loss rate ⁇ (WW) / W ⁇ X 100 (% by mass) ⁇ ⁇ ⁇ (3)
- the occurrence of yarn breakage during high-speed weaving is sufficiently prevented to enable high-speed weaving, and furthermore, the generation of dust during manufacturing is prevented, and the working environment can be improved.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Woven Fabrics (AREA)
- Inorganic Fibers (AREA)
- Treatment Of Fiber Materials (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2005800093128A CN1934303B (zh) | 2004-03-22 | 2005-03-22 | 各向同性沥青系碳纤维细纱、使用了该细纱的复合丝和织物及它们的制造方法 |
EP20050721259 EP1734164A1 (en) | 2004-03-22 | 2005-03-22 | Spun isotropic pitch-based carbon fiber yarn, composite yarn and woven fabric made by using the same; and processes for the production of them |
US10/593,902 US7807590B2 (en) | 2004-03-22 | 2005-03-22 | Isotropic pitch-based carbon fiber spun yarn, composite yarn and fabric using the same, and manufacturing methods thereof |
JP2006511281A JP4568912B2 (ja) | 2004-03-22 | 2005-03-22 | 等方性ピッチ系炭素繊維紡績糸、それを用いた複合糸及び織物、並びにそれらの製造方法 |
KR1020067021894A KR101206562B1 (ko) | 2004-03-22 | 2005-03-22 | 등방성 피치계 탄소 섬유 방적사, 그것을 이용한 복합사 및직물, 및 이들의 제조 방법 |
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JP2004083149 | 2004-03-22 | ||
JP2004-083149 | 2004-03-22 |
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WO2005090664A1 true WO2005090664A1 (ja) | 2005-09-29 |
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PCT/JP2005/005159 WO2005090664A1 (ja) | 2004-03-22 | 2005-03-22 | 等方性ピッチ系炭素繊維紡績糸、それを用いた複合糸及び織物、並びにそれらの製造方法 |
Country Status (6)
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US (1) | US7807590B2 (ja) |
EP (1) | EP1734164A1 (ja) |
JP (1) | JP4568912B2 (ja) |
KR (1) | KR101206562B1 (ja) |
CN (1) | CN1934303B (ja) |
WO (1) | WO2005090664A1 (ja) |
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EP2065109A4 (en) * | 2006-08-22 | 2015-11-04 | Kureha Corp | CARBON FIBERS CONTAINING LAMINATED MOLDING BODY AND METHOD OF MANUFACTURING THEREOF |
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IT202100006710A1 (it) * | 2021-03-19 | 2022-09-19 | Ab Tech Lab S R L | Metodo per la stabilizzazione delle fibre di carbonio |
CN113667299B (zh) * | 2021-07-29 | 2023-04-11 | 金发科技股份有限公司 | 一种抗静电聚酰胺组合物及其制备方法和应用 |
CN115874342A (zh) * | 2023-02-27 | 2023-03-31 | 无锡市鼎麒新材料科技有限公司 | 一种多线式碳纤维布的织造方法 |
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- 2005-03-22 WO PCT/JP2005/005159 patent/WO2005090664A1/ja active Application Filing
- 2005-03-22 CN CN2005800093128A patent/CN1934303B/zh not_active Expired - Fee Related
- 2005-03-22 JP JP2006511281A patent/JP4568912B2/ja not_active Expired - Fee Related
- 2005-03-22 KR KR1020067021894A patent/KR101206562B1/ko not_active Expired - Lifetime
- 2005-03-22 EP EP20050721259 patent/EP1734164A1/en not_active Withdrawn
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Also Published As
Publication number | Publication date |
---|---|
JP4568912B2 (ja) | 2010-10-27 |
US7807590B2 (en) | 2010-10-05 |
US20070190883A1 (en) | 2007-08-16 |
EP1734164A1 (en) | 2006-12-20 |
KR101206562B1 (ko) | 2012-11-29 |
CN1934303B (zh) | 2012-10-03 |
CN1934303A (zh) | 2007-03-21 |
KR20060133048A (ko) | 2006-12-22 |
JPWO2005090664A1 (ja) | 2008-05-22 |
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