WO2010021045A1 - 等方性ピッチ系炭素繊維織物及びその製造方法 - Google Patents
等方性ピッチ系炭素繊維織物及びその製造方法 Download PDFInfo
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- WO2010021045A1 WO2010021045A1 PCT/JP2008/064929 JP2008064929W WO2010021045A1 WO 2010021045 A1 WO2010021045 A1 WO 2010021045A1 JP 2008064929 W JP2008064929 W JP 2008064929W WO 2010021045 A1 WO2010021045 A1 WO 2010021045A1
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- carbon fiber
- sliver
- machine
- isotropic pitch
- based carbon
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Classifications
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
- D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
- D01F9/12—Carbon filaments; Apparatus specially adapted for the manufacture thereof
- D01F9/14—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments
- D01F9/145—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from pitch or distillation residues
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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
- D03D15/50—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 properties of the yarns or threads
- D03D15/573—Tensile strength
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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
- 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
- D03D15/41—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 twist
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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
- D03D15/50—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 properties of the yarns or threads
- D03D15/513—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 properties of the yarns or threads heat-resistant or fireproof
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4209—Inorganic fibres
- D04H1/4242—Carbon fibres
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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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- 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
- D10B2401/00—Physical properties
- D10B2401/06—Load-responsive characteristics
- D10B2401/063—Load-responsive characteristics high strength
-
- 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
- D10B2401/00—Physical properties
- D10B2401/16—Physical properties antistatic; conductive
-
- 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
- D10B2505/00—Industrial
- D10B2505/02—Reinforcing materials; Prepregs
Definitions
- the present invention relates to an isotropic pitch-based carbon fiber fabric and a method for producing the same.
- polyacrylonitrile (PAN) and carbon fiber, PAN-based carbon fiber and rayon-based carbon fiber and pitch-based carbon fiber based on pitch are manufactured.
- Isotropic pitch-based carbon fibers do not exhibit high strength or high elastic modulus.
- isotropic pitch-based carbon fibers are manufactured at a relatively low price because the raw materials are inexpensive and the manufacturing method is advantageous for mass production, and are lightweight, chemical resistant, heat resistant, slidable and conductive. Are widely used.
- Carbon fibers are used in many forms such as filaments, yarns, spun yarns, woven fabrics, chops, milled, mats, prepregs, and the firing temperature and degree of graphitization can be changed depending on the application.
- carbon fiber fabrics are used as constituent materials for heat insulating materials, sliding materials, and conductive materials, and are required to have an affinity with polymer materials, and control of the thickness and voids of the fabric is important.
- a “sliver” is a fiber assembly in which discontinuous single fibers constituting the fiber are generally bundled in parallel without being entangled more than necessary, and infinite length compared to the constituent fiber length. It can be understood as meaning a string-like fiber assembly having a length that may be said.
- the carbon fiber sliver is a semi-finished product of various carbon fiber products. A spun yarn is obtained by spinning the carbon fiber sliver, and a carbon fiber fabric (cross) is obtained by weaving the spun yarn. These carbon fiber products are widely used in applications such as heat-resistant materials, conductive materials, reinforcing materials, and heat-insulating materials that use heat resistance, conductivity, strength, and the like.
- the present applicant has preferentially extended a pitch-based carbon fiber mat in which the fiber length extension directions of the pitch-based carbon fibers are preferentially aligned in one direction and are deposited together.
- a pitch carbon fiber sliver manufacturing method has been proposed (Japanese Patent Publication No. 2005-179809), which is characterized in that it is stretched and sooted directly by a sooting machine while being transferred in the deposition direction.
- the applicant of the present invention is suitable as a gas diffuser for a solid polymer electrolyte fuel cell having a mass per unit area of 50 g / m 2 or more and less than 200 g / m 2 and a thickness of 0.20 to 0.60 mm.
- a pitch-based carbon fiber spun yarn fabric Japanese Patent Publication No. 2005-163208.
- the present invention relates to an isotropic pitch-based carbon fiber woven fabric and an isotropic pitch having a mass per unit area of 200 g / m 2 to 700 g / m 2 and a thickness of 0.35 mm to 3.65 mm.
- An object of the present invention is to provide a method for producing a carbon fiber woven fabric from a carbon fiber.
- an isotropic pitch-based carbon fiber woven fabric having a mass per unit area of 200 g / m 2 to 700 g / m 2 and a thickness of 0.35 mm to 3.65 mm is provided.
- the isotropic pitch-based carbon fiber fabric of the present invention preferably has a thickness of 0.35 mm or more and 2.00 mm or less.
- the step of drawing and carding the isotropic pitch-based carbon fiber mat to form the first sliver, and the first sliver to the first kneading A step of drawing a second sliver obtained by drawing with a rolling machine with a second drawing machine to form a third sliver, and drawing a sliver finally obtained with a spinning machine, A mass per unit area of 200 g / m 2 or more and 700 g / m 2 or less, comprising a step of forming a spun yarn having a fineness of 1500 tex and a step of weaving the spun yarn, and 0.35 mm or more and 3.65 mm
- a method for producing an isotropic pitch-based carbon fiber fabric having the following thickness is provided.
- the production method of the present invention it is preferable to further comprise a step of forming a fourth sliver by stretching a third sliver obtained by stretching with the second stretching machine with a third stretching machine. More preferably, the production method of the present invention further includes a step of forming a fifth sliver by stretching a fourth sliver obtained by stretching with the third stretching machine with a fourth stretching machine. .
- the draw ratio in the first drawing machine is 2.0 to 10.0 times
- the draw ratio in the second drawing machine is 2.0 to 10.0 times
- the draw ratio in the third drawing machine 1.0 to 7.0 times
- the draw ratio in the fourth drawing machine is 1.0 to 7.0 times
- the draw ratio in the spinning machine is 10.0 to 20.0 times Is preferred.
- An isotropic pitch-based carbon fiber mat that is stretched and carded using the carding machine includes a rotating ball that ejects a pitch by a centrifugal force, and a belt conveyor that accumulates the pitch ejected from the rotating ball.
- the belt conveyor is melt-spun isotropic pitch-based carbon fiber using a centrifugal spinning machine configured to traverse (reciprocate) in a direction orthogonal to the traveling direction while moving in the traveling direction, After stretching, it is preferable that the isotropic pitch-based carbon fiber mat is deposited on the belt conveyor to be infusible and fired.
- the isotropic pitch-based carbon fiber woven fabric of the present invention has excellent heat resistance and electrical conductivity and has good mechanical strength. Therefore, the material in the furnace, a sealing material such as packing, a friction material such as a brake pad, a sealing material, and It can be used as a material for CFRP (carbon fiber reinforced plastic) such as wear rings, C / C composites, fuel cells, secondary batteries, and the like.
- CFRP carbon fiber reinforced plastic
- FIG. 1 is a view of a centrifugal spinning machine and a belt conveyor used in the process of forming an isotropic pitch-based carbon fiber mat as seen from the direction of the rotation axis.
- FIG. 2 is a cross-sectional view taken along the line AA ′ of FIG.
- FIG. 3 is a side view in the traveling direction of the carding machine used in the step of forming the sliver from the isotropic pitch-based carbon fiber mat.
- FIG. 4 is a schematic configuration diagram of a drawing machine used in a process of forming a sliver.
- FIG. 5 is a schematic configuration diagram of a spinning machine used in the process of forming spun yarn.
- FIG. 6 is a schematic configuration diagram of the twisting machine.
- the step of forming the isotropic pitch-based carbon fiber mat in the present invention is preferably formed using the centrifugal spinning machine shown in FIGS.
- the isotropic pitch heated and melted in the spinning cylinder 1 is quantified by a gear pump 9, and a plurality of nozzle holes 3 arranged in a single row or a plurality of rows on the outer peripheral portion through a pitch supply line 8. It is poured into the rotating ball 2 that it has. Centrifugal force acts on the isotropic pitch by the rotation of the rotating ball 2, and the isotropic pitch is blown from the nozzle hole 3 and spun.
- gas is uniformly ejected from a drawing air outlet 6 surrounding the spinning cylinder 1 through the drawing air supply pipe 5.
- This gas acts as stretching wind.
- the spun fiber is drawn along the surface of the drawing plate 4 surrounding the spinning cylinder 1 by the cooperation of the drawing air from the drawing air outlet 6 and the centrifugal force generated by the rotation of the rotating ball 2.
- the pitch fiber contacts with at least one cutter 7 on the stretched plate and is cut.
- the cut pitch-based fibers draw a trajectory as shown as a to e and a ′ to e ′ in FIG. 1 due to drawing air, gravity, and arbitrary intake air from the back side of the deposition surface of the belt conveyor 11.
- the fibers are gradually entangled and accumulated in a single yarn shape.
- the belt conveyor 11 repetitively moves, that is, traverses at least twice the moving speed of the belt conveyor in the direction perpendicular to the fiber drawing direction while moving the pitch-based fiber deposition surface in the fiber drawing direction.
- a pitch fiber mat having a constant width and a constant thickness is formed.
- the pitch fiber mat is infusibilized and fired to form carbon fiber according to a conventional method.
- Infusibilization may be performed by heating the pitch fiber mat to 100 to 400 ° C. in an air atmosphere containing an oxidizing gas such as NO 2 , SO 2 , and ozone.
- Firing may be performed by heating the infusibilized pitch-based fiber mat to 500 to 2000 ° C. in a non-oxidizing atmosphere.
- the step of forming a sliver from the isotropic pitch-based carbon fiber mat is preferably performed using a carding machine that has been improved widely for mat-like carbon fiber treatment.
- FIG. 3 is a side view in the advancing direction of a carding machine (wide gil) 20 that has been improved to have a wide width for treating mat-like carbon fibers.
- the basic configuration of the carding machine 20 is that between the back roller 21 and the front roller 22 arranged in the traveling direction of the carbon fiber mat, a pair of an oil spray supply device 23 and a number of metal needle arrays are arranged above and below the mat.
- a forum 24 is arranged.
- the carbon fiber mat 25 supplied from the left side of the drawing by a horizontal belt conveyor has, for example, an oil agent for facilitating the flossing process while being sent from the back roller 21 to the front roller 22.
- the fiber direction is aligned.
- the carbon fiber is stretched by a peripheral speed ratio between the front roller 21 and the back roller 22 rotated at a peripheral speed larger than that of the back roller 22 to form a sliver 26.
- the step of forming the sliver in the present invention is preferably performed using a drawing machine 30 as shown in FIG.
- the carbon fiber sliver is subjected to a strip treatment (a treatment for obtaining a sliver with improved fiber alignment and homogeneity by drawing (drafting) a plurality of slivers while doubling them).
- a strip treatment a treatment for obtaining a sliver with improved fiber alignment and homogeneity by drawing (drafting) a plurality of slivers while doubling them.
- the coarsely wound sliver 26 is extracted from the coiler 27 of the carding machine 20 shown in FIG. 3 and stored in the first product case 31 of the drawing machine 30 shown in FIG.
- the two slivers 26A and 26B are pulled out from the first product case 31.
- the two slivers 26A and 26B pulled out are ligated while being sent to the left in the drawing along the cradle guide 33 and the sliver guide 34 of the cradle stand 32, and the back roller 35, the middle roller 36, the front roller 37, After being stretched between the nip roller 38 and the top roller 39 and re-rolled by the forer 40, the sliver 41 with improved alignment is sent to the second product case 44 via the sliver guide 42 and the coiler 43.
- the draw ratio in the first drawing machine is 2.0 to 10.0 times
- the draw ratio in the second drawing machine is 2.0 to 10.0 times
- the draw ratio in the third drawing machine is 1.0 to 7.0 times
- the draw ratio in the fourth drawing machine is 1.0 to 7.0 times.
- FIG. 4 shows a mode in which two slivers are subjected to the drawing process to form one sliver
- the number of slivers to be subjected to the drawing process is not limited to this.
- the step of forming the spun yarn in the present invention is preferably performed using a spinning machine (ring spinning machine) 50 having the configuration shown in FIG.
- the carbon fiber sliver 45 is taken out from the second product case 44 of the fourth drawing machine configured as shown in FIG. 4, and the krill stand roller 51, the back roller 52, the middle roller 53 (the apron 53A and the bottom 53B), and the front roller 54 are removed.
- a single twisted yarn (single yarn) is obtained by a twisting (primary twisting) treatment in a winding bobbin 58 having a snell guide 55, a spindle 56 and a ring 57.
- the single twisted yarn (single yarn) wound around the winding bobbin 58 is combined with a plurality of (two in the figure) single twisted yarns by a twisting machine 60 having a configuration as shown in FIG. 6 as an example.
- the yarn is twisted (secondarily twisted) to obtain a twisted yarn (twist yarn).
- two bobbins 58 wound with the single twisted yarn from the spinning machine shown in FIG. 5 are attached to the krill stand 61, and the single twisted yarns from both the bobbins 58 are attached to the sliver guide 62, the front guide 63, and the snell guide 64.
- the isotropic pitch-based carbon fiber fabric of the present invention can be obtained by plain weaving, basket weaving, twill weaving, etc., of the spun yarn thus obtained.
- Fiber strength Carbon fibers extracted one by one were attached to a tensile test fixing frame to obtain a test piece. A state in which the fixed frame is attached to a tensile tester (Shimadzu Corporation, small desktop testing machine EZ Test-5N) so that the carbon fiber gripping interval is 25 mm, and the central part of the fixed frame is cut. Thus, the breaking strength when pulled at a tensile strength of 5 mm / min was determined. Using the average value and the average fiber diameter value obtained by 12 measurements, the tensile strength per unit area was determined by the following formula.
- a test piece in the preferential extension deposition direction of carbon fibers (length in the preferential extension deposition direction: 300 mm, length in the direction orthogonal to the preferential extension deposition direction: 50 mm) is cut from the carbon fiber mat of the sample, and then the mat
- the tensile strength M 200 (N / tex) of the mat was obtained by dividing the tensile strength at the time of pulling at a tensile speed of 200 mm / min by the tex value of the mat test piece. The average value of 5 points for each sample was determined.
- the thickness of the test piece was the same in the range of 5 to 30 mm.
- Fineness of spun yarn The spun yarn cut out to 1 m was wound up and put in an aluminum box having a known empty mass.
- the sample was dried by heating for 1 hour in a constant temperature dryer adjusted to 110 ° C. Subsequently, the aluminum box was transferred to a desiccator and cooled for 1 hour, and then precisely weighed, and the fineness was determined by the following formula (physical test method general rules for JIS L0105 textiles). However, since the official moisture content of carbon fiber is 0.0%, no correction coefficient is used.
- Tensile strength of the woven fabric Five test pieces having a width of about 60 mm were cut out from the woven fabric with the warp direction as the long side (length 400 mm) to obtain a test piece in the warp direction. Five test pieces having a width of about 60 cm with the weft direction as the long side (length 400 mm) were cut out from the woven fabric to obtain test pieces in the weft direction. Each test piece was attached to a tensile tester (Orientec Co., Ltd., RTC-1310A type) adjusted to a grip interval of 150 mm, and the width was adjusted to 50 mm by removing the yarn from both sides in the width direction.
- a tensile tester Orientec Co., Ltd., RTC-1310A type
- Woven fabric thickness Measured according to carbon fiber cloth test method, method 1 of JCFS 003-1982. Specifically, for 5 test pieces of 100 mm ⁇ 100 mm, using a linear paper micrometer PPM-25 type (manufactured by Mitutoyo Corporation), the spindle is gently rotated and the measurement surface is parallel to the sample surface. The scale when the ratchet made three sounds was read. The average value of the measured values was obtained to 2 digits after the decimal point.
- a device in which two horizontal centrifugal spinning machines having a nozzle hole diameter of 0.7 mm, a nozzle hole number of 420, and a ball diameter of 200 mm are arranged in parallel with the belt conveyor is operated at a rotation speed of 800 rpm and a drawing wind of 100 m / sec, and 10.8 kg per machine.
- Isotropic pitch was melt spun at a throughput of / h.
- the melt-spun isotropic pitch fibers were sequentially cut by a cutter and deposited on a belt conveyor.
- the belt conveyor is a wire mesh belt (40 mesh) that moves in the traveling direction at a traveling speed of 1.51 m / min and reciprocates in a direction orthogonal to the traveling direction at a rate of 5 times per minute.
- the extending direction of the fiber length of the isotropic pitch fibers can be preferentially aligned with the traveling direction of the belt conveyor.
- isotropic as an aggregate of short fibers (fiber length is mainly 100 to 1500 mm) having an effective mat width of 700 mm, a basis weight of 0.32 kg / m 2 , a mat thickness of 20 mm, and an apparent density of 16 kg / m 3 .
- a pitch-based carbon fiber mat was deposited. This mat can be handled as a continuous yarn because the extending direction of the fiber length of the isotropic pitch fibers is aligned in one direction.
- the isotropic pitch-based carbon fiber mat was infusible. Infusibilization was performed using an infusibilizing furnace having a total length of 10 m in which a 2 m wide bar was circulated at a constant speed of 0.044 m / min without using a tray. Infusible furnace was air atmosphere containing NO 2 2%. An isotropic pitch-based carbon fiber mat is suspended over a length of 1.5 m on a bar having an interval of 300 mm, and an in-furnace gas is supplied from the direction orthogonal to the orientation direction of the isotropic pitch-based carbon fiber mat by 0.5 m / The mixture was heated to 100 to 250 ° C. over 3 hours while inducing infusibility while removing the heat of reaction at a flow rate of sec (superficial velocity).
- the isotropic pitch-based carbon fiber mat was fired. Firing was performed using a vertical heat treatment furnace having a total length of 14.8 m (including the cooling part) and a width of 2 m. An isotropic pitch-based carbon fiber mat was suspended by its own weight in the furnace, heated to 1000 ° C. over 15 minutes and heat-treated, then cooled to 200 ° C., and sent out of the furnace.
- the isotropic pitch-based carbon fiber thus obtained had good single fiber properties with no fiber fusion, a fiber diameter of 14.5 ⁇ m, a tensile strength of 800 MPa, and an elongation of 2.3%. .
- B. Sooting, kneading, spinning An isotropic pitch-based carbon fiber mat having a width of 700 mm, a thickness of 20 mm, and 220 g / m was subjected to a sooting process in a carding machine.
- carbon fiber spinning oil (“Merinol C-75” manufactured by Takemoto Yushi Co., Ltd.) is sprayed onto an isotropic pitch-based carbon fiber mat, and 2 wt% I wore it. While stretching the isotropic pitch-based carbon fiber mat 10.0 times, the fibers were aligned to form a first sliver of 22 g / m.
- the obtained first sliver was passed through the first drawing machine and stretched 7.2 times.
- the second sliver thus obtained was passed through a second drawing machine and stretched 7.2 times.
- the sliver finally obtained was passed through a spinning machine, drawn 20.0 times, and spun at a Z (left) twist number of 220 times / m to obtain a 67 tex spun yarn.
- the two spun yarns were combined using a twisting machine and combined at an S (right) twist number of 135 times / m to obtain a spun yarn of 135 tex.
- This spun yarn was plain woven to obtain a woven fabric having a mass per unit area of 210 g / m 2 and a thickness of 0.33 mm.
- a spinning yarn of 200 tex was obtained in the same manner as in Example 1 except that the draw ratio of the spinning machine was changed to 13.5 times.
- This spun yarn was plain woven to obtain a woven fabric having a mass per unit area of 210 g / m 2 and a thickness of 0.49 mm.
- Example 2 The same procedure as in Example 1 was performed except that the draw ratio of the first drawing machine was 5.2 times, the draw ratio of the second drawing machine was 5.3 times, and the draw ratio of the spinning machine was changed to 10.0 times. 500 tex spun yarn was obtained.
- This spun yarn was plain woven to obtain a woven fabric having a mass per unit area of 210 g / m 2 and a thickness of 1.21 mm.
- Example 2 The same procedure as in Example 1 was performed except that the draw ratio of the first drawing machine was 3.7 times, the draw ratio of the second drawing machine was changed to 3.7 times, and the draw ratio of the spinning machine was changed to 10.0 times. , 1000 tex spun yarn was obtained.
- This spun yarn was plain woven to obtain a woven fabric having a mass per unit area of 210 g / m 2 and a thickness of 2.43 mm.
- a 200 tex spun yarn was obtained in the same manner as in Example 1 except that the isotropic pitch-based carbon fiber formed at a firing temperature of 2000 ° C. was used and the draw ratio of the spinning machine was changed to 13.5 times. It was.
- This spun yarn was plain woven to obtain a woven fabric having a mass per unit area of 210 g / m 2 and a thickness of 0.49 mm.
- a 200 tex spun yarn was obtained in the same manner as in Example 1 except that an isotropic pitch-based carbon fiber having a yarn diameter of 12.5 ⁇ m was used and the draw ratio of the spinning machine was changed to 13.5 times.
- This spun yarn was plain woven to obtain a woven fabric having a mass per unit area of 210 g / m 2 and a thickness of 0.49 mm.
- a 200 tex spun yarn was obtained in the same manner as in Example 1 except that an isotropic pitch-based carbon fiber having a yarn diameter of 18.0 ⁇ m was used and the draw ratio of the spinning machine was changed to 13.5 times.
- This spun yarn was plain woven to obtain a woven fabric having a mass per unit area of 210 g / m 2 and a thickness of 0.49 mm.
- the sliver is drawn with a draw ratio of the first drawing machine of 4.0 times and a draw ratio of the second drawing machine of 10.0 times. After being obtained, the obtained sliver was further passed through a third drawing machine and stretched 4.0 times. Furthermore, the sliver thus obtained was passed through a fourth drawing machine and stretched 4.0 times. Subsequently, it carried out similarly to Example 1 except having changed the draw ratio of the fine spinning machine to 17.0 times, and obtained the 135 tex spun yarn.
- This spun yarn was woven into a basket to obtain a woven fabric having a mass per unit area of 295 g / m 2 and a thickness of 0.48 mm.
- a 200 tex spun yarn was obtained in the same manner as in Example 8 except that the draw ratio in the fourth drawing machine was changed to 3.9 times and the draw ratio in the fine spinning machine was changed to 11.8 times.
- This spun yarn was woven into a basket to obtain a woven fabric having a mass per unit area of 295 g / m 2 and a thickness of 0.63 mm.
- the 200 tex spun yarn obtained in Example 9 was twilled to obtain a woven fabric having a mass per unit area of 210 g / m 2 and a thickness of 0.35 mm.
- a 450 tex spun yarn was obtained in the same manner as in Example 8 except that the draw ratio in the second drawing machine was changed to 5.1 times and the draw ratio in the fine spinning machine was changed to 10.0 times.
- This spun yarn was twilled to obtain a woven fabric having a mass per unit area of 670 g / m 2 and a thickness of 1.06 mm.
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Abstract
Description
2:回転ボール
3:ノズル
4:延伸板
5:延伸風供給パイプ
6:延伸風吹き出し口
7:カッター
8:ピッチ供給ライン
9:ピッチ供給用ギヤーポンプ
10:ボール駆動モータ
11:ベルトコンベア
12:ベルトコンベア駆動ローラ
13:ベルトコンベア駆動モータ
14:トラバーサー
15:トラバーサー駆動モータ
16:排気ファン
(1)繊維強度:1本ずつ抜き取った炭素繊維を引張試験用固定枠に貼付して試験片とした。この試験片を、炭素繊維の掴み間隔が25mmとなるように固定枠を引張試験機((株)島津製作所、小型卓上試験機EZ Test-5N)に取り付け、固定枠の中央部を切断した状態で、引張強度5mm/minで引っ張った時の破断強さを求めた。12回の測定により得られた平均値と平均繊維直径の値を用いて、次式により単位面積当たりの引張強さを求めた。
(3)紡績糸の繊度:1mに切り出した紡績糸を空質量既知のアルミ箱に巻き取って入れておいた。試料を110℃に調整した恒温乾燥器内で1時間加熱して乾燥させた。続いて、アルミ箱をデシケータに移して1時間冷却した後、精密に秤量し、次式により繊度を求めた(JIS L0105繊維製品の物理試験方法通則)。ただし、炭素繊維の公定水分率は0.0%であるため補正係数を使用しない。
(5)織物の単位面積当たりの質量:織物の全質量を織物の紙管への巻き取り時のカウンター長さと織り幅から得られる全平面面積で除した値を織物の単位面積当たりの質量[g/m2]とした。
(6)織物の引張強さ:織物から、縦糸方向を長辺(長さ400mm)として幅約60mmの試験片を5個切り出し、縦糸方向の試験片とした。織物から、横糸方向を長辺(長さ400mm)として幅約60cmの試験片を5個切り出し、横糸方向の試験片とした。各試験片を掴み間隔150mmに調節した引張試験機((株)オリエンテック、RTC-1310A型)に取り付け、幅方向の両側から糸を除去して幅を50mmに調整した。その後、引張速度200mm/minで引張試験を行い、引張強さ[N/5cm]を測定した。縦糸方向及び横糸方向の測定値各5個の平均値を求めた。
(7)織物の厚み:炭素繊維クロス試験法、JCFS 003-1982の方法1に準拠して測定した。具体的には、100mm×100mmの試験片5個について、直進式ペーパーマイクロメーターPPM-25型((株)ミツトヨ製)を用いて、そのスピンドルを静かに回転させて測定面が試料面に平行に接触し、ラチェットが3回音をたてたときの目盛りを読み取った。測定値の平均値を小数点以下2桁まで求めた。
石油ナフサを熱分解して、エチレン、プロピレン等のオレフィン類を分取した残りの高沸点留分(いわゆるエチレンボトム油)を380℃で熱処理して320℃、10mmHg(絶対値)で減圧蒸留して、炭素含有率94.5wt%、平均分子量620、軟化点(高架式フローテスター)170℃の等方性ピッチを得た。
B.梳綿、練条、紡績
幅700mm、厚さ20mm、220g/mの等方性ピッチ系炭素繊維マットを梳綿機において梳綿処理した。梳綿機において、フロントローラとバックローラとの間で、炭素繊維紡績用油剤(竹本油脂(株)製「メリノールC-75」)を等方性ピッチ系炭素繊維マットに噴霧し、2wt%展着させた。等方性ピッチ系炭素繊維マットを10.0倍に延伸させながら、繊維を引き揃え、22g/mの第1のスライバーを形成した。
Claims (9)
- 200g/m2以上700g/m2以下の単位面積あたりの質量と、0.35mm以上3.65mm以下の厚みと、を有する、等方性ピッチ系炭素繊維織物。
- 0.35mm以上2.00mm以下の厚みを有する、請求項1に記載の等方性ピッチ系炭素繊維織物。
- 梳綿機を用いて、等方性ピッチ系炭素繊維マットを延伸・梳綿処理して、第1のスライバーを形成する工程と、
当該第1のスライバーを第1練条機で延伸して第2のスライバーを形成し、次いで当該第2のスライバーを第2練条機で延伸して第3のスライバーを形成する工程と、
最終的に得られたスライバーを精紡機で延伸して、30~1500texの繊度を有する紡績糸を形成する工程と、
当該紡績糸を織る工程と、
を具備する、200g/m2以上700g/m2以下の単位面積あたりの質量と、0.35mm以上3.65mm以下の厚みと、を有する、等方性ピッチ系炭素繊維織物の製造方法。 - 前記第2練条機で延伸して得られた第3のスライバーを第3練条機で延伸して第4のスライバーを形成する工程をさらに具備する、請求項3に記載の製造方法。
- 前記第3練条機で延伸して得られた第4のスライバーを第4練条機で延伸して第5のスライバーを形成する工程をさらに具備する、請求項4に記載の製造方法。
- 前記第1練条機での延伸倍率は2.0~10.0倍、前記第2練条機での延伸倍率は2.0~10.0倍、前記精紡機での延伸倍率は10.0~20.0倍である、請求項3に記載の製造方法。
- 前記第3練条機での延伸倍率は1.0~7.0倍である、請求項4に記載の製造方法。
- 前記第4練条機での延伸倍率は1.0~7.0倍である、請求項5に記載の製造方法。
- 前記梳綿機を用いて延伸・梳綿処理する等方性ピッチ系炭素繊維マットは、遠心力によりピッチを噴出させる回転ボールと、当該回転ボールから噴出されたピッチを堆積させるベルトコンベアとを具備し、当該ベルトコンベアは進行方向に移動すると同時に進行方向に直交する方向にトラバース(往復移動)するように構成されている遠心紡糸機を用いて、等方性ピッチ系炭素繊維を溶融紡糸し、延伸した後に、当該ベルトコンベア上に堆積させて等方性ピッチ系炭素繊維マットを形成し、次いで不融化し、焼成して得られるものである、請求項3に記載の製造方法。
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JP7140438B1 (ja) | 2022-04-15 | 2022-09-21 | 竹本油脂株式会社 | 炭素繊維紡績糸製造用処理剤、及び炭素繊維紡績糸 |
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JPS6233823A (ja) * | 1985-06-28 | 1987-02-13 | Kureha Chem Ind Co Ltd | 炭素繊維マツトの製造方法及び装置 |
JP2005163208A (ja) * | 2003-12-01 | 2005-06-23 | Kureha Chem Ind Co Ltd | 炭素繊維紡績糸およびその織物 |
JP2005179809A (ja) * | 2003-12-17 | 2005-07-07 | Kureha Chem Ind Co Ltd | ピッチ系炭素繊維スライバー及び紡績糸の製造方法 |
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JPS6233823A (ja) * | 1985-06-28 | 1987-02-13 | Kureha Chem Ind Co Ltd | 炭素繊維マツトの製造方法及び装置 |
JP2005163208A (ja) * | 2003-12-01 | 2005-06-23 | Kureha Chem Ind Co Ltd | 炭素繊維紡績糸およびその織物 |
JP2005179809A (ja) * | 2003-12-17 | 2005-07-07 | Kureha Chem Ind Co Ltd | ピッチ系炭素繊維スライバー及び紡績糸の製造方法 |
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JP2017197854A (ja) * | 2016-04-25 | 2017-11-02 | ▲翼▼程科技股▲分▼有限公司 | 炭素繊維スペーサー及びその結合方法 |
JP7140438B1 (ja) | 2022-04-15 | 2022-09-21 | 竹本油脂株式会社 | 炭素繊維紡績糸製造用処理剤、及び炭素繊維紡績糸 |
JP2023157607A (ja) * | 2022-04-15 | 2023-10-26 | 竹本油脂株式会社 | 炭素繊維紡績糸製造用処理剤、及び炭素繊維紡績糸 |
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