WO2018147072A1 - 繊維構造体及び繊維強化複合材 - Google Patents

繊維構造体及び繊維強化複合材 Download PDF

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Publication number
WO2018147072A1
WO2018147072A1 PCT/JP2018/001963 JP2018001963W WO2018147072A1 WO 2018147072 A1 WO2018147072 A1 WO 2018147072A1 JP 2018001963 W JP2018001963 W JP 2018001963W WO 2018147072 A1 WO2018147072 A1 WO 2018147072A1
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Prior art keywords
yarn
fiber structure
fiber
woven
outermost
Prior art date
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PCT/JP2018/001963
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English (en)
French (fr)
Inventor
河原真梨
Original Assignee
株式会社豊田自動織機
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Filing date
Publication date
Application filed by 株式会社豊田自動織機 filed Critical 株式会社豊田自動織機
Priority to EP18751594.5A priority Critical patent/EP3581690A4/en
Priority to US16/484,230 priority patent/US20200032433A1/en
Priority to CN201880009765.8A priority patent/CN110291239A/zh
Publication of WO2018147072A1 publication Critical patent/WO2018147072A1/ja

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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D5/00—Selvedges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/024—Woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/06—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer characterised by a fibrous or filamentary layer mechanically connected, e.g. by needling to another layer, e.g. of fibres, of paper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B32B5/262—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary characterised by one fibrous or filamentary layer being a woven fabric layer
    • B32B5/263—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary characterised by one fibrous or filamentary layer being a woven fabric layer next to one or more woven fabric layers
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D1/00—Woven fabrics designed to make specified articles
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D11/00—Double or multi-ply fabrics not otherwise provided for
    • 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
    • D04H1/44—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • 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
    • D06M17/00—Producing multi-layer textile fabrics
    • D06M17/04—Producing multi-layer textile fabrics by applying synthetic resins as adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • B32B2260/023—Two or more layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0253—Polyolefin fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0261—Polyamide fibres
    • B32B2262/0269—Aromatic polyamide fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/105—Ceramic fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • 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 a multi-layered textile fiber structure having a first yarn and a second yarn comprising a bundle of reinforcing fibers, and a fiber-reinforced composite material.
  • Fiber reinforced composites are widely used as lightweight structural materials.
  • a fiber structure as a reinforcing base material for a fiber reinforced composite material
  • a fiber reinforced composite material in which a resin is used as a matrix in this fiber structure is used as a structural material for aircraft, automobiles, buildings and the like.
  • a multilayer fabric is used as a fiber structure.
  • a laminated fabric as a multilayer fabric is formed, for example, by laminating a plurality of single layer fabrics formed by plain weave. In addition, it may be formed by bonding the plurality of laminated fabrics in the laminating direction.
  • the woven ends of the fiber structure for example, the woven end where the end of the warp is located along the main axis direction of the warp may be unraveled. Then, there is a possibility that the weft extending perpendicularly to the warp may come off the unwoven end. Therefore, in order to suppress the unraveling of the woven end of the fibrous structure, for example, in Patent Document 1, a tape is attached to the woven end of the fibrous structure.
  • An object of the present invention is to provide a fiber structure and a fiber reinforced composite material which can suppress the unwinding of a woven end without adding another member.
  • a fiber structure for solving the above problems is a fiber structure comprising a bundle of reinforcing fibers and a multilayer fabric having a first yarn and a second yarn arranged in directions orthogonal to each other.
  • a first woven end of the multilayer fabric at which the end of the first yarn is located along the first yarn yarn main axis direction, and the first woven end of the second yarn along the second yarn yarn main axis direction A second woven end of the multi-layer woven fabric on which two yarn ends are located, and at least one of the first woven end and the second woven end including an eyelet;
  • the detents are formed by entwining the reinforcing fibers with yarns overlapping in the laminating direction of the multilayer fabric, and the blind portions form the woven end Of the other yarns arranged in the direction of the main axis of the yarn
  • the present invention is characterized in that it is formed on at least one of the outermost yarn arranged and the end portion of the one yarn located closer to the end of the one
  • the sealing portion when the sealing portion is formed on the outermost yarn, the reinforcing fibers are intertwined between the yarns overlapping in the stacking direction with respect to the outermost yarn, and the detachment of the outermost yarn from the woven end is suppressed Be done.
  • the closing portion is formed at the end of one yarn, the reinforcing fibers are intertwined with each other at the end of one yarn in the main thread direction of the one yarn rather than the outermost yarn. It is suppressed that the outermost yarn is pulled out between the ends of one yarn. Therefore, the formation of the sealing portion can suppress the unwinding of the woven end.
  • the sealing portion is formed by entangled reinforcing fibers with yarns overlapping in the stacking direction. Therefore, no separate member is required to prevent the unwinding of the woven end.
  • the sealing portion may be provided only on the outermost yarn. According to this, in the fiber structure, the sealing portion is not formed inside the outermost yarn along the yarn main axis direction of one yarn. For this reason, it is possible to minimize the meandering of the reinforcing fiber generated by forming the sealing portion.
  • the first yarn and the second yarn may be formed of non-continuous fibers. According to this, in the sealing portion, the non-continuous fibers are intertwined between the yarns overlapping in the stacking direction, so that many portions where the fibers are intertwined can be formed, and the unfolding can be effectively suppressed.
  • a fiber-reinforced composite material for solving the above-mentioned problems is a fiber-reinforced composite material in which a reinforcing base made of a fiber structure is impregnated with a matrix resin, and the fiber structure is claim 1 to 3
  • the gist is that it is the fiber structure according to any one of the above.
  • the blind portion is formed by entangled reinforcing fibers with yarns overlapping in the stacking direction. Therefore, no separate member is required to prevent the unwinding of the woven end. Therefore, in the fiber-reinforced composite material in which the fiber structure is impregnated with the matrix resin, the separate member does not adversely affect the composite of the matrix resin.
  • the partial top view which shows the fiber structure of embodiment.
  • the figure which looked at the fiber structure of embodiment from the arrow B of FIG. The enlarged view which shows a blind part.
  • the fiber reinforced composite material 10 is configured by impregnating a fiber structure 11 made of a multilayer fabric with a matrix resin Ma.
  • a matrix resin Ma for example, an epoxy resin of a thermosetting resin is used.
  • the fiber structure 11 is configured by laminating a plurality of woven fabrics 20.
  • each fabric 20 is a combination of a plurality of warp yarns 21 as a first yarn and a plurality of weft yarns 31 as a second yarn, and has a square shape in plan view.
  • Each fabric 20 is formed by plain-weaving a warp yarn 21 and a weft yarn 31.
  • the warp yarn 21 and the weft yarn 31 are arranged orthogonal to each other.
  • the warp yarns 21 and the weft yarns 31 are formed of non-continuous fibers 11 a.
  • an organic fiber or an inorganic fiber which is a reinforcing fiber may be used, and as the organic fiber, an aramid fiber, a poly-p-phenylene benzobisoxazole fiber, an ultrahigh molecular weight polyethylene fiber, etc. may be mentioned.
  • the inorganic fibers include carbon fibers, glass fibers, ceramic fibers and the like.
  • the direction in which the main yarn axis L1 of the warp 21 extends is the first direction X of the fiber structure 11, the direction in which the main yarn L2 of the weft 31 extends, and the direction perpendicular to the first direction X is the second direction of the fiber structure 11.
  • the plurality of warps 21 are arranged in parallel with each other in the second direction Y of the fiber structure 11.
  • the plurality of weft yarns 31 are arranged in parallel to each other in the first direction X of the fiber structure 11. As shown in FIG.
  • the fiber structure 11 is provided with a first woven end 12 at a portion where each end 21 a of the warp 21 along the main axis direction (first direction X) of the warp 21 is located.
  • the weft 31 is located inside the first direction X (closer to the center of the fiber structure 11) than the end 21 a of each warp 21.
  • the weft yarns 31, among the plurality of weft yarns 31 arranged in the first direction X the weft yarn 31 arranged closest to the end 21a of the warp yarn 21 is regarded as the outermost weft yarn 32 as the outermost yarn.
  • the warp yarn 21 becomes one yarn and the weft yarn 31 becomes the other yarn, and the outermost weft yarn 32 is arranged closer to the end 21 a of the warp yarn 21. Therefore, in the first woven end 12, the outermost weft 32 is positioned closer to the center of the fiber structure 11 than the end 21 a of each warp 21.
  • the fiber structure 11 is provided with a second woven end 13 at a portion where each end 31 a of the weft 31 is located along the main yarn direction (second direction Y) of the weft 31.
  • the warp yarn 21 is positioned inside the second direction Y (closer to the center of the fiber structure 11) than the end portion 31 a of each weft yarn 31.
  • the warps 21 arranged at the outermost side of the warps 21 are regarded as the outermost warps 22 as the outermost threads.
  • the outermost warp yarn 22 is positioned closer to the center of the fiber structure 11 than the end portions 31 a of the respective weft yarns 31.
  • the weft yarn 31 becomes one yarn and the warp yarn 21 becomes the other yarn, and the outermost warp yarn 22 is arranged closer to the end 31 a of the weft yarn 31.
  • the fiber structure 11 includes the sealing portions 14 at the first woven end 12 and the second woven end 13.
  • the sealing portion 14 provided at the first woven end portion 12 is formed by subjecting the outermost weft yarn 32 to needle punching.
  • the sealing portion 14 provided at the first woven end 12 is an outermost weft 32 and a warp 21 overlapping the outermost weft 32 in the laminating direction in each fabric 20. And entangled with each other in the non-continuous fibers 11a. Further, in the sealing portion 14 provided at the first woven end portion 12, the outermost weft 32 of one fabric 20 and the warp 21 of the other fabric 20 are between the fabrics 20 overlapping in the stacking direction, The non-continuous fibers 11a are formed to be intertwined with each other. Further, although not shown, when the needles N pass through both sides in the width direction of each warp 21 and are driven in, the non-continuous fibers 11 a are formed by the wefts 31 overlapping each other in the stacking direction. It is done.
  • the sealing portion 14 provided at the second woven end portion 13 is formed by subjecting the outermost warp yarn 22 to needle punching.
  • the sealing portion 14 provided at the second woven end portion 13 entangles the outermost warp yarn 22 and the weft yarn 31 overlapping the outermost warp yarn 22 in the stacking direction with the non-continuous fibers 11a. It is formed.
  • the outermost warp 22 of one fabric 20 and the weft 31 of the other fabric 20 are between the fabrics 20 overlapping in the stacking direction, The non-continuous fibers 11a are formed to be intertwined with each other.
  • the non-continuous fibers 11a are formed by intertwining the weft yarns 31 overlapping each other in the laminating direction. It is done.
  • the non-continuous fibers 11 a meander between the warps 21 and wefts 31 overlapping with each other in the stacking direction and the warps 21 and wefts 31 and are entangled complicatedly. Since the warp yarns 21 and the weft yarns 31 are formed from the non-continuous fibers 11 a, in the sealing portion 14, the non-continuous fibers 11 a are intertwined in many places.
  • the fiber structure 11 made of the multilayer fabric configured as described above impregnates and hardens the matrix resin Ma to form the fiber reinforced composite material 10.
  • the impregnation and curing of the matrix resin Ma is performed by, for example, the RTM (resin transfer molding) method.
  • RTM resin transfer molding
  • the sealing portion 14 provided in the fiber structure 11 prevents the first woven end 12 and the second woven end 13 from being unwound.
  • the sealing portion 14 is formed by entangling reinforcing fibers of yarns overlapping in the stacking direction. Therefore, it is possible to suppress the unraveling of the first woven end 12 and the second woven end 13 without adding another member, and it is possible to suppress an increase in manufacturing cost.
  • the fiber reinforced composite material 10 using the fiber structure 11 it is possible to suppress the unwinding without providing another part. Therefore, as in the case where another component is added to suppress the unwinding, the impregnation failure of the matrix resin Ma caused by the other component (adverse effect on the composite of the matrix resin Ma) does not occur, and the other component is the cause The strength reduction of the fiber reinforced composite 10 does not occur.
  • the sealing portion 14 provided at the first woven end portion 12 is formed by subjecting the outermost weft yarn 32 to needle punching. For this reason, the outermost weft yarn 32 which is likely to be dislodged from the first woven end 12 can be entangled with the warp yarn 21, and the yarn omission of the outermost weft yarn 32 can be suppressed. Further, the sealing portion 14 provided at the second woven end portion 13 is formed by subjecting the outermost warp yarn 22 to a needle punch. Therefore, it is possible to cause the outermost warp 22 having a possibility of threading out from the second woven end 13 to be entangled with the weft 31 and to prevent the threading out of the outermost warp 22.
  • the sealing portion 14 provided in the first woven end portion 12 is formed by subjecting the outermost weft 32 to needle punching, and the sealing portion 14 provided in the second woven end portion 13 is the outermost
  • the warp yarn 22 is formed by needle punching. Therefore, in the fiber structure 11, the sealing portion 14 does not exist inside the outermost weft 32 in the first direction X (closer to the center of the fiber structure 11), and inside the outermost warp 22 in the second direction Y ( The sealing portion 14 does not exist in the center of the fiber structure 11).
  • the obtained fiber-reinforced composite material 10 it is possible to minimize the meandering of the non-continuous fibers 11a generated by forming the filling portions 14 and to minimize the strength reduction caused by the meandering of the non-continuous fibers 11a. .
  • the warp yarns 21 and the weft yarns 31 are formed of non-continuous fibers 11a. For this reason, in the sealing portion 14, a large number of locations where the non-continuous fibers 11a are intertwined between the warp yarn 21 and the weft yarn 31, the warp yarns 21 and the weft yarns 31 overlapping in the stacking direction are formed. Therefore, it is possible to suppress the unfolding at the sealing portion 14 and to effectively suppress the unfolding of the first woven end 12 and the second woven end 13.
  • the above embodiment may be modified as follows.
  • the warp yarns 21 and weft yarns 31 may not be formed from the non-continuous fibers 11a, and may be continuous yarns formed by bundling several hundreds to several tens of thousands of continuous fibers.
  • the fiber structure 40 may be a multilayer fabric formed by multilayer weaving.
  • the fiber structure 40 includes warp layers 41, 43 and 45 in which warps 21 as first yarns are arranged in parallel to one another, and weft layers 42 and 44 in which wefts 31 as second yarns are arranged in parallel to one another. , 46.
  • the fiber structure 40 includes a first warp layer 41, a first weft layer 42 disposed below the first warp layer 41, and a second warp disposed below the first weft layer 42.
  • the third weft layer 46 is a multilayer fabric formed by multilayer weaving.
  • the first warp layer 41, the first weft layer 42, the second warp layer 43, the second weft layer 44, the third warp layer 45, and the third weft layer 46 are wound in the stacking direction by the binding yarns 48. It is bound.
  • the binding yarn 48 is for holding the shape of the fiber structure 40 and is one of warps.
  • the fiber structure 40 includes the sealing portion 14 at the first woven end portion 51 where each end 21 a of the warp 21 along the main axis direction of the warp 21 is located. Further, although not shown, the fiber structure 40 is provided with the sealing portion 14 at the second woven end where the respective ends 31a of the weft 31 along the main axis direction of the weft 31 are located.
  • the weft threads 31 inside the first direction X with respect to the outermost weft threads 32 are needle-punched to make the sealing portion 14 along the first direction X
  • a plurality of blind portions 14 may be provided along the second direction Y Good.
  • the sealing portion 14 may be provided only at the end 21 a of the warp 21 located outside the outermost weft 32 in the first direction X. That is, the sealing portion 14 may be provided at the end 21 a of the warp 21 located closer to the end of the warp main axis direction (first direction X) of the warp 21 as one yarn than the outermost weft 32.
  • the sealing portion 14 may be provided only at the end portion 31 a of the weft yarn 31 located outside the outermost warp yarn 22 in the second direction Y. That is, the sealing portion 14 may be provided at the end 31 a of the weft yarn 31 located closer to the end of the yarn main axis direction (second direction Y) of the weft yarn 31 as one yarn than the outermost warp yarn 22.
  • the non-continuous fibers 11 a are warps 21 overlapping each other in the stacking direction.
  • the outermost weft yarn 32 is restrained from being intertwined between the end portions 21 a of the warp yarns 21.
  • the non-continuous fibers 11a are intertwined between the weft yarns 31 overlapping in the lamination direction.
  • the sealing portion 14 is formed by winding the non-continuous fibers 11 a between the warps 21 and the wefts 31 that overlap in the stacking direction. Therefore, no separate member is needed to prevent the unwinding of the woven ends 12 and 13.
  • the outermost weft 32 may be needle-punched to add a sealing portion 14, or in the second woven end 13, the outermost warp 22 may be needle-punched. It may be added and the sealing part 14 may be added.
  • the first woven end 12 is comprised of the sealing portion 14 located at the outermost weft 32 and the sealing portion 14 located at the end 21 a of the warp 21. Can be effectively deterred.
  • the second woven end 13 is unwound by the closed portion 14 located at the outermost warp 22 and the closed portion 14 located at the end 31a of the weft 31. Can be effectively deterred.
  • the blind portion 14 may be provided on only one of the first woven end 12 or 51 and the second woven end 13 of the fiber structure 11 or 40. In this case, the end portions located on the upstream side and the downstream side in the direction in which the fiber structures 11 and 40 are woven are cut after the fiber structures 11 and 40 are manufactured.
  • the stoppers 14 may be provided, and the sealing members 14 may not be provided at both ends in the weave width direction.
  • Needle punch is used as a method of forming the sealing part 14, but tufting may be adopted to form the sealing part 14, and in addition, the reinforcing fibers (non-continuous fibers 11a) between the layers are intertwined Any method may be adopted as long as it can be used.
  • the woven fabric 20 is formed by plain weave, but the woven fabric 20 may be formed by satin weave or twill weave.
  • the number of weft layers and warp layers to be laminated may be changed as appropriate.
  • a fiber structure in which the sealing portion is formed by needle punching is formed by needle punching.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Woven Fabrics (AREA)
  • Reinforced Plastic Materials (AREA)
  • Knitting Of Fabric (AREA)

Abstract

繊維構造体は、第１の織端部及び第２の織端部に目止め部を備える。目止め部は、繊維構造体の積層方向に重なり合う糸の非連続繊維同士を絡めて形成されている。また、目止め部は、経糸の最外経糸及び緯糸の最外緯糸に対して形成されている。

Description

繊維構造体及び繊維強化複合材
　本発明は、強化繊維の束よりなる第１の糸及び第２の糸を有する多層織物製の繊維構造体、及び繊維強化複合材に関する。
　繊維強化複合材は軽量の構造材料として広く使用されている。繊維強化複合材用の強化基材として繊維構造体があり、この繊維構造体に樹脂をマトリックスとした繊維強化複合材は航空機、自動車及び建築物等の構造材として用いられている。また、繊維構造体としては、多層織物が使用されている。
　多層織物としての積層織物は、例えば平織りによって形成された単層織物を複数積層して形成される。他には、それら複数積層した織物を積層方向に結合することにより形成されることもある。ところで、繊維構造体の運搬時や賦形時、繊維構造体の織端部のうち、例えば経糸の糸主軸方向に沿った該経糸の端部が位置する織端部が解れることがある。すると、経糸に直交して延びる緯糸が、解れた織端部から脱落する虞がある。そこで、繊維構造体の織端部の解れを抑止するため、例えば、特許文献１では、繊維構造体の織端部にテープを貼着している。
特開２００２－２４９９５７号公報
　ところが、特許文献１では、繊維構造体の織端部の解れを抑止するために、繊維構造体とは別部材であるテープが必要となり、繊維構造体の製造コストが嵩む。また、解れ抑止のために使用したテープが、マトリックスとの複合化に悪影響を及ぼす虞がある。
　本発明の目的は、別部材を追加せずに織端部の解れを抑止できる繊維構造体及び繊維強化複合材を提供することにある。
　上記問題点を解決するための繊維構造体は、強化繊維の束よりなり、かつ互いに直交する方向に配列された第１の糸及び第２の糸を有する多層織物よりなる繊維構造体であって、前記第１の糸の糸主軸方向に沿った前記第１の糸の端部が位置する前記多層織物の第１の織端部、及び前記第２の糸の糸主軸方向に沿った前記第２の糸の端部が位置する前記多層織物の第２の織端部を有するとともに、前記第１の織端部及び前記第２の織端部の少なくとも一方に目止め部を備え、前記目止め部は、前記第１の糸及び前記第２の糸において前記多層織物の積層方向に重なり合う糸同士で前記強化繊維を絡めて形成され、前記目止め部は、前記織端部を形成する一方の糸の糸主軸方向に沿って配列された他方の糸のうち最も前記一方の糸の端部寄りに配列された最外糸、及び前記最外糸よりも前記一方の糸の糸主軸方向の端寄りに位置した前記一方の糸の前記端部のうちの少なくとも一方に形成されていることを要旨とする。
　これによれば、最外糸に目止め部が形成された場合には、最外糸に対して積層方向に重なり合う糸同士で強化繊維が絡み合い、織端部からの最外糸の抜けが抑止される。また、一方の糸の端部に目止め部が形成された場合には、最外糸よりも、一方の糸の糸主軸方向端寄りでは、一方の糸の端部同士で強化繊維が絡み合い、一方の糸の端部同士の間から最外糸が抜けることが抑止される。よって、目止め部を形成することで、織端部の解れを抑止できる。そして、目止め部は、積層方向に重なる糸同士で強化繊維を絡ませて形成されている。よって、織端部の解れを抑止するために、別部材を必要としない。
　また、繊維構造体について、前記目止め部を、前記最外糸のみに備えていてもよい。
　これによれば、繊維構造体において、一方の糸の糸主軸方向に沿った最外糸より内側には目止め部を形成しない。このため、目止め部を形成することで発生する強化繊維の蛇行を最小限とすることができる。
　また、繊維構造体について、前記第１の糸及び前記第２の糸は非連続繊維から形成されていてもよい。
　これによれば、目止め部では、積層方向に重なり合う糸同士の間で非連続繊維が絡み合うこととなり、繊維が絡み合う箇所を多数形成でき、解れを効果的に抑止できる。
　上記問題点を解決するための繊維強化複合材は、繊維構造体製の強化基材にマトリックス樹脂を含浸させた繊維強化複合材であって、前記繊維構造体が請求項１～請求項３のうちいずれか一項に記載の繊維構造体であることを要旨とする。
　これによれば、目止め部により、繊維構造体の織端部の解れを抑止できる。目止め部は、積層方向に重なる糸同士で強化繊維を絡ませて形成されている。よって、織端部の解れを抑止するために、別部材を必要としない。したがって、繊維構造体にマトリックス樹脂が含浸された繊維強化複合材において、別部材がマトリックス樹脂の複合化に悪影響を及ぼすことがない。
　本発明によれば、別部材を追加せずに織端部の解れを抑止できる。
実施形態の繊維強化複合材を模式的に示す図。 実施形態の繊維構造体を示す部分平面図。 実施形態の繊維構造体を図２の矢印Ａから見た図。 実施形態の繊維構造体を図２の矢印Ｂから見た図。 目止め部を示す拡大図。 多層織りによって形成された繊維構造体を模式的に示す図。 目止め部の別例を示す図。 目止め部の別例を示す図。
　以下、繊維構造体及び繊維強化複合材を具体化した一実施形態を図１～図５にしたがって説明する。
　図１に示すように、繊維強化複合材１０は、多層織物製の繊維構造体１１にマトリックス樹脂Ｍａを含浸させて構成されている。マトリックス樹脂Ｍａとしては、例えば、熱硬化性樹脂のエポキシ樹脂が使用される。繊維構造体１１は、織物２０を複数積層して構成されている。
　図２に示すように、各織物２０は、第１の糸としての複数の経糸２１と、第２の糸としての複数の緯糸３１とを組み合わせたものであり、平面視四角形状である。各織物２０は経糸２１と緯糸３１を平織りして形成されている。経糸２１と緯糸３１は互いに直交して配列されている。経糸２１及び緯糸３１は、非連続繊維１１ａで形成されている。非連続繊維１１ａとしては、強化繊維である有機繊維又は無機繊維を使用してもよく、有機繊維としては、アラミド繊維、ポリ－ｐ－フェニレンベンゾビスオキサゾール繊維、超高分子量ポリエチレン繊維等が挙げられ、無機繊維としては、炭素繊維、ガラス繊維、セラミック繊維等が挙げられる。非連続繊維１１ａで形成された糸束の形態としては、紡績糸、牽切糸等が挙げられる。
　経糸２１の糸主軸Ｌ１が延びる方向を繊維構造体１１の第１方向Ｘとし、緯糸３１の糸主軸Ｌ２が延びる方向であり、第１方向Ｘに直交する方向を繊維構造体１１の第２方向Ｙとする。繊維構造体１１において、複数の経糸２１は、繊維構造体１１の第２方向Ｙに互いに平行に配列されている。また、繊維構造体１１において、複数の緯糸３１は、繊維構造体１１の第１方向Ｘに互いに平行に配列されている。図３に示すように、繊維構造体１１において、積層方向に重なり合う織物２０同士では、一方の織物２０の経糸２１が、重なり合う他方の織物２０の緯糸３１と重なり合っている。なお、積層方向に重なり合う織物２０同士は、図示しない結束糸によって積層方向に拘束されている。
　図２に示すように、繊維構造体１１は、経糸２１の糸主軸方向（第１方向Ｘ）に沿った経糸２１の各端部２１ａが位置する部分に第１の織端部１２を備える。第１の織端部１２において、各経糸２１の端部２１ａよりも第１方向Ｘの内側（繊維構造体１１の中央寄り）には緯糸３１が位置している。緯糸３１において、第１方向Ｘに配列された複数の緯糸３１のうち、最も経糸２１の端部２１ａに近く、最外に配列された緯糸３１を最外糸としての最外緯糸３２とする。この場合、経糸２１が一方の糸となるとともに緯糸３１が他方の糸となり、最外緯糸３２が経糸２１の端部２１ａ寄りに配列されていることとなる。よって、第１の織端部１２では、各経糸２１の端部２１ａより繊維構造体１１の中央寄りに最外緯糸３２が位置している。
　繊維構造体１１は、緯糸３１の糸主軸方向（第２方向Ｙ）に沿った緯糸３１の各端部３１ａが位置する部分に第２の織端部１３を備える。第２の織端部１３において、各緯糸３１の端部３１ａよりも第２方向Ｙの内側（繊維構造体１１の中央寄り）には経糸２１が位置している。経糸２１において、第２方向Ｙに配列された複数の経糸２１のうち、最外に配列された経糸２１を最外糸としての最外経糸２２とする。第２の織端部１３では、各緯糸３１の端部３１ａより繊維構造体１１の中央寄りに最外経糸２２が位置している。この場合、緯糸３１が一方の糸となるとともに経糸２１が他方の糸となり、最外経糸２２が緯糸３１の端部３１ａ寄りに配列されていることとなる。
　繊維構造体１１は、第１の織端部１２及び第２の織端部１３に目止め部１４を備える。第１の織端部１２に設けられた目止め部１４は、最外緯糸３２に対してニードルパンチを施すことで形成されている。
　図３又は図４に示すように、第１の織端部１２に設けられた目止め部１４は、各織物２０において、最外緯糸３２と、該最外緯糸３２と積層方向に重なり合う経糸２１とが、非連続繊維１１ａ同士で絡み合って形成されている。また、第１の織端部１２に設けられた目止め部１４は、積層方向に重なり合う織物２０同士の間において、一方の織物２０の最外緯糸３２と他方の織物２０の経糸２１とが、非連続繊維１１ａ同士で絡み合って形成されている。また、図示しないが、ニードルＮが、各経糸２１の幅方向の両側を通過して打ち込まれた場合は、目止め部１４は、積層方向に重なり合う緯糸３１同士で非連続繊維１１ａが絡み合って形成されている。
　図２に示すように、第２の織端部１３に設けられた目止め部１４は、最外経糸２２に対してニードルパンチを施すことで形成されている。第２の織端部１３に設けられた目止め部１４は、各織物２０において、最外経糸２２と、該最外経糸２２と積層方向に重なり合う緯糸３１とが、非連続繊維１１ａ同士で絡み合って形成されている。また、第２の織端部１３に設けられた目止め部１４は、積層方向に重なり合う織物２０同士の間において、一方の織物２０の最外経糸２２と他方の織物２０の緯糸３１とが、非連続繊維１１ａ同士で絡み合って形成されている。また、図示しないが、ニードルＮが、各緯糸３１の幅方向の両側を通過して打ち込まれた場合は、目止め部１４は、積層方向に重なり合う緯糸３１同士で非連続繊維１１ａが絡み合って形成されている。
　図５に示すように、上記構成の目止め部１４では、積層方向に重なり合う経糸２１と緯糸３１、経糸２１同士、及び緯糸３１同士で非連続繊維１１ａが蛇行し、複雑に絡み合っている。経糸２１及び緯糸３１は非連続繊維１１ａから形成されていることから、目止め部１４では、非連続繊維１１ａが多くの場所で絡み合っている。
　上記のように構成された多層織物製の繊維構造体１１は、マトリックス樹脂Ｍａを含浸硬化させて、繊維強化複合材１０となる。マトリックス樹脂Ｍａの含浸硬化は、例えば、ＲＴＭ（レジン・トランスファー・モールディング）法で行なわれる。繊維構造体１１にマトリックス樹脂Ｍａが含浸硬化されることにより、繊維構造体１１の経糸２１及び緯糸３１は、マトリックス樹脂Ｍａと複合化して繊維強化複合材１０となる。
　次に、繊維構造体１１及び繊維強化複合材１０の作用を記載する。
　繊維構造体１１が備える目止め部１４により、第１の織端部１２及び第２の織端部１３の解れが抑止される。
　上記実施形態によれば、以下のような効果を得ることができる。
　（１）目止め部１４は、積層方向に重なり合う糸の強化繊維同士を絡ませて形成されている。よって、別部材を追加することなく第１の織端部１２及び第２の織端部１３の解れを抑止でき、製造コストが嵩むことを抑制できる。
　また、繊維構造体１１を用いた繊維強化複合材１０においては、別部品を設けることなく解れを抑止できる。よって、別部品を追加して解れを抑止した場合のように、別部品を原因としたマトリックス樹脂Ｍａの含浸不良（マトリックス樹脂Ｍａの複合化への悪影響）が発生せず、別部品を原因とした繊維強化複合材１０の強度低下も発生しない。
　（２）第１の織端部１２に設けた目止め部１４は、最外緯糸３２にニードルパンチを施して形成されている。このため、第１の織端部１２から糸抜けする虞のある最外緯糸３２を経糸２１と絡ませ、最外緯糸３２の糸抜けを抑止できる。また、第２の織端部１３に設けた目止め部１４は、最外経糸２２にニードルパンチを施して形成されている。このため、第２の織端部１３から糸抜けする虞のある最外経糸２２を緯糸３１と絡ませ、最外経糸２２の糸抜けを抑止できる。
　（３）第１の織端部１２に設けた目止め部１４は、最外緯糸３２にニードルパンチを施して形成され、第２の織端部１３に設けた目止め部１４は、最外経糸２２にニードルパンチを施して形成されている。よって、繊維構造体１１において第１方向Ｘの最外緯糸３２より内側（繊維構造体１１の中央寄り）には目止め部１４が存在せず、第２方向Ｙの最外経糸２２より内側（繊維構造体１１の中央寄り）には目止め部１４が存在しない。その結果、得られる繊維強化複合材１０において、目止め部１４を形成することによって発生する非連続繊維１１ａの蛇行を最小限とし、非連続繊維１１ａの蛇行によって発生する強度低下を最小限にできる。
　（４）経糸２１及び緯糸３１は非連続繊維１１ａから形成されている。このため、目止め部１４では、積層方向に重なり合う経糸２１と緯糸３１、経糸２１同士、及び緯糸３１同士の間で非連続繊維１１ａが絡み合う箇所が多数形成される。よって、目止め部１４での解れを抑止でき、第１の織端部１２及び第２の織端部１３の解れを効果的に抑止できる。
　なお、上記実施形態は以下のように変更してもよい。
　○ 経糸２１及び緯糸３１は非連続繊維１１ａから形成されていなくてもよく、連続繊維が数百～数万本束ねられて形成された連続糸であってもよい。
　○ 図６に示すように、繊維構造体４０は、多層織りによって形成された多層織物であってもよい。繊維構造体４０は、第１の糸としての経糸２１が互いに平行に配列された経糸層４１，４３，４５と、第２の糸としての緯糸３１が互いに平行に配列された緯糸層４２，４４，４６と、を備える。具体的には、繊維構造体４０は、第１経糸層４１と、第１経糸層４１より下方に配置された第１緯糸層４２と、第１緯糸層４２より下方に配置された第２経糸層４３と、第２経糸層４３より下方に配置された第２緯糸層４４と、第２緯糸層４４より下方に配置された第３経糸層４５と、第３経糸層４５より下方に配置された第３緯糸層４６と、を備える。
　繊維構造体４０は、第１経糸層４１、第１緯糸層４２、第２経糸層４３、第２緯糸層４４、第３経糸層４５、及び第３緯糸層４６が結束糸４８によって積層方向に拘束されている。結束糸４８は、繊維構造体４０の形状保持用であり、経糸の一つである。
　繊維構造体４０は、経糸２１の糸主軸方向に沿った経糸２１の各端部２１ａが位置する第１の織端部５１に目止め部１４を備える。また、図示しないが、繊維構造体４０は、緯糸３１の糸主軸方向に沿った緯糸３１の各端部３１ａが位置する第２の織端部に目止め部１４を備える。
　○ 図７に示すように、第１の織端部１２において、最外緯糸３２よりも第１方向Ｘの内側の緯糸３１にニードルパンチを施して、目止め部１４を第１方向Ｘに沿って複数設けてもよい。同様に、第２の織端部１３において、最外経糸２２よりも第２方向Ｙの内側の経糸２１にニードルパンチを施して、目止め部１４を第２方向Ｙに沿って複数設けてもよい。
　○ 図８に示すように、第１の織端部１２において、最外緯糸３２よりも第１方向Ｘの外側に位置した経糸２１の端部２１ａのみに目止め部１４を設けてもよい。すなわち、最外緯糸３２よりも、一方の糸としての経糸２１の糸主軸方向（第１方向Ｘ）の端寄りに位置した経糸２１の端部２１ａに目止め部１４を設けてもよい。同様に、第２の織端部１３において、最外経糸２２よりも第２方向Ｙの外側に位置した緯糸３１の端部３１ａのみに目止め部１４を設けてもよい。すなわち、最外経糸２２よりも、一方の糸としての緯糸３１の糸主軸方向（第２方向Ｙ）の端寄りに位置した緯糸３１の端部３１ａに目止め部１４を設けてもよい。
　このように構成した場合、第１の織端部１２において、最外緯糸３２よりも経糸２１の糸主軸方向端寄りとなる端部２１ａでは、積層方向に重なる経糸２１同士で非連続繊維１１ａが絡み合い、経糸２１の端部２１ａ同士の間から最外緯糸３２が抜けることが抑止される。同様に、第２の織端部１３において、最外経糸２２よりも緯糸３１の糸主軸方向端寄りとなる端部３１ａでは、積層方向に重なる緯糸３１同士で非連続繊維１１ａが絡み合い、緯糸３１の端部３１ａ同士の間から最外経糸２２が抜けることが抑止される。よって、目止め部１４を形成することで、織端部１２，１３の解れを抑止できる。そして、目止め部１４は、積層方向に重なる経糸２１同士及び緯糸３１同士で非連続繊維１１ａを絡ませて形成されている。よって、織端部１２，１３の解れを抑止するために、別部材を必要としない。
　なお、第１の織端部１２において、最外緯糸３２にニードルパンチを施して目止め部１４を追加してもよいし、第２の織端部１３において、最外経糸２２にニードルパンチを施して目止め部１４を追加してもよい。これによれば、第１の織端部１２において、最外緯糸３２に位置する目止め部１４と、経糸２１の端部２１ａに位置する目止め部１４とで、第１の織端部１２の解れを効果的に抑止できる。同様に、第２の織端部１３において、最外経糸２２に位置する目止め部１４と、緯糸３１の端部３１ａに位置する目止め部１４とで、第２の織端部１３の解れを効果的に抑止できる。
　○ 目止め部１４は、繊維構造体１１，４０の第１の織端部１２，５１及び第２の織端部１３のうちいずれか一方だけに設けてもよい。この場合は、繊維構造体１１，４０を織り進む方向の上流側及び下流側に位置する端部は、繊維構造体１１，４０が製造された後は、切断されるため、切断端部に目止め部１４を設け、織り幅方向の両端部は目止め部１４を設けないようにしてもよい。
　○ 目止め部１４を形成する方法としてニードルパンチを採用したが、タフティングを採用して目止め部１４を形成してもよく、その他、層間の強化繊維（非連続繊維１１ａ）同士を絡ませることができる方法であれば、いずれの方法を採用してもよい。
　○ 実施形態では、織物２０を平織りして形成したが、織物２０を繻子織り、又は綾織りして形成してもよい。
　○ 繊維構造体４０において、積層する緯糸層及び経糸層の数は適宜変更してもよい。
　○ 繊維構造体１１，４０を繊維強化複合材１０の強化基材として使用する場合、マトリックス樹脂の種類や繊維強化複合材１０の製造方法に、特に規制はない。
　次に、上記実施形態及び別例から把握できる技術的思想について以下に追記する。
　（１）前記目止め部は、ニードルパンチによって形成されている繊維構造体。
　Ｍａ　　マトリックス樹脂
　１０　　繊維強化複合材
　１１，４０　　繊維構造体
　１１ａ　　非連続繊維
　１２，５１　　第１の織端部
　１３　　第２の織端部
　１４　　目止め部
　２０　　織物
　２１　　第１の糸としての経糸
　２１ａ，３１ａ　　端部
　２２　　最外糸としての最外経糸
　３１　　第２の糸としての緯糸
　３２　　最外糸としての最外緯糸

Claims (5)

  1. 　強化繊維の束よりなり、かつ互いに直交する方向に配列された第１の糸及び第２の糸を有する多層織物よりなる繊維構造体であって、
    　前記第１の糸の糸主軸方向に沿った前記第１の糸の端部が位置する前記多層織物の第１の織端部、及び前記第２の糸の糸主軸方向に沿った前記第２の糸の端部が位置する前記多層織物の第２の織端部を有するとともに、前記第１の織端部及び前記第２の織端部の少なくとも一方に目止め部を備え、
    　前記目止め部は、前記第１の糸及び前記第２の糸において前記多層織物の積層方向に重なり合う糸同士で前記強化繊維を絡めて形成され、
    　前記目止め部は、
    　前記織端部を形成する一方の糸の糸主軸方向に沿って配列された他方の糸のうち最も前記一方の糸の端部寄りに配列された最外糸、
    　及び前記最外糸よりも前記一方の糸の糸主軸方向の端寄りに位置した前記一方の糸の前記端部のうちの少なくとも一方に形成されていることを特徴とする繊維構造体。
  2. 　前記目止め部を、前記最外糸のみに備える請求項１に記載の繊維構造体。
  3. 　前記第１の糸及び前記第２の糸は非連続繊維から形成される請求項１又は請求項２に記載の繊維構造体。
  4. 　前記目止め部は、ニードルパンチによって形成されている請求項１～請求項３のうちいずれか一項に記載の繊維構造体。
  5. 　繊維構造体製の強化基材にマトリックス樹脂を含浸させた繊維強化複合材であって、前記繊維構造体が請求項１～請求項４のうちいずれか一項に記載の繊維構造体であることを特徴とする繊維強化複合材。
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