CN1261630C - Unidirectional carbon fiber fabric, manufacturing method thereof, and reinforced concrete structure - Google Patents

Abstract

The present invention provides a unidirectional carbon fiber fabric, a manufacturing method thereof, and a concrete structure reinforced with the fabric. The specification of the warp yarn and the weight per unit area of the fabric have a large degree of design freedom. The longitudinal yarn of the fabric is a longitudinal yarn formed by combining a plurality of non-twisted yarns composed of multiple carbon fiber tows. The longitudinal yarn is also in a non-twisted state. The bundled filaments are fixedly connected with the horizontal wires. Its manufacturing method is to combine the untwisted carbon fiber tows with any number of yarns respectively to form a plurality of longitudinal yarns in a non-twisted state; use the longitudinal yarns and horizontal yarns to make fabrics, and then pass through The heating and pressing device forms the carbon fiber tow composite into a non-twisted flat shape, melts the thermoplastic resin contained in the weft yarn, and fixes the weft to the carbon fiber tow composite. A reinforced concrete structure is provided with a fiber-reinforced plastic layer containing the above-mentioned fabric on the surface of the structure.

Description

Unidirectional carbon fiber fabric, manufacturing method thereof, and reinforced concrete structure

technical field

The present invention relates to a unidirectional carbon fiber fabric for reinforcing civil structures or for carbon fiber-reinforced resin, a manufacturing method thereof, and a concrete structure reinforced with the fabric.

Background technique

Carbon fiber has good mechanical properties such as specific elastic modulus and strength index, so it is processed into intermediate materials such as fabrics, fabric preforms, or unidirectional preforms, shaped them, and used as a material impregnated with matrix resin. Carbon Fiber Reinforced Resin (CFRP), or repair and reinforcement materials for concrete structures.

In these applications, in order to reduce the workload of lamination operations, when thick carbon fiber filaments are used to make fabrics with a large unit area weight, the binding force produced by the interlacing of longitudinal and horizontal filaments is strong, and the softness of the fabric and the impregnation of the matrix resin Poor sex.

In the past, the unidirectional carbon fiber fabric with a large unit area weight can be produced by reducing the distance between the weaving filaments to be smaller than the width of the carbon fiber longitudinal filaments to increase the fabric density. If the gap is too dense, the impregnation of the matrix resin is not sufficient. Therefore, even if the fabric is used for molding, a uniform molded product (prepreg, etc.) or laminate cannot be obtained, that is, unevenness such as voids or stress concentration occurs.

In addition, the commercially available carbon fiber yarn is a specification product with a certain fineness and width. In addition, since the shape is maintained by a setting agent, when it is used as a longitudinal yarn of a unidirectional carbon fiber fabric, it needs to be changed. The fineness and width of the warp yarns, the distance between warp yarns and the width ratio of warp yarns, the weight per unit area of the fabric, etc. are very difficult, and the design freedom of the fabric is small.

Related prior art documents include: Japanese Patent Application Laid-Open No. 7-118988 (publication date: May 9, 1995), Japanese Patent Application Laid-Open No. 10-102792 (publication date: April 21, 1998) and the like.

purpose of invention

The present invention has been made in view of the above problems, and an object of the present invention is to provide a unidirectional carbon fiber fabric, a method for producing the fabric, and a concrete structure reinforced with the fabric. The unidirectional carbon fiber of the present invention, even if the longitudinal filaments are large and thick carbon fiber filaments, as a reinforcing base material of CFRP, the fabric has a large weight per unit area, good flexibility, and good impregnation with matrix resin , and cheap and has high strength characteristics. There is a large degree of freedom in designing the fineness and width of the warp yarns, the warp yarn pitch/width ratio of the warp yarns, the weight per unit area of the fabric, and the like.

Technical solutions

That is, the unidirectional carbon fiber fabric of the present invention is composed of warp yarns and weft yarns, the warp yarns are carbon fiber tows in an untwisted state made of a plurality of carbon fibers, and the warp yarns are A carbon fiber tow composite obtained by combining several non-twisted carbon fiber tows, and the carbon fiber tow composite is also in a non-twisted state, and the carbon fiber tow composite and horizontal The wires are fixed with thermoplastic resin.

The manufacturing method of the unidirectional carbon fiber fabric of the present invention uses the untwisted carbon fiber tow that is made up of a plurality of carbon fibers as the longitudinal yarn, and uses the filament that contains thermoplastic resin as the horizontal yarn to produce the unidirectional carbon fiber fabric. Fiber fabric, characterized in that,

Separately unwind a plurality of the above-mentioned carbon fiber tows;

The above-mentioned untwisted carbon fiber tows are each combined in any number to form a plurality of carbon fiber tows in a non-twisted state;

passing a plurality of horizontal filaments between the plurality of carbon fiber tow composites to make a semi-finished fabric;

Pass the semi-finished fabric through a heating and pressing device to make the carbon fiber tow composite into a non-twisted flat shape, and melt the thermoplastic resin contained in the weft yarn, and solidify the weft yarn and the carbon fiber tow catch.

The reinforced concrete structure of the present invention is characterized in that a carbon fiber reinforced plastic layer is provided on the surface of the concrete structure, and the carbon fiber reinforced plastic layer contains the unidirectional carbon fiber fabric of the present invention.

Fig. 1 is a schematic diagram of a warp yarn supply device used in Examples.

Fig. 2 is the state when two flat carbon fiber yarns are fused in the present invention.

FIG. 3 is a perspective view of a unidirectional carbon fiber fabric of Example 1. FIG.

Example

Next, the present invention will be described in detail.

Generally, the so-called "unidirectional carbon fiber fabric" refers to a fabric in which filaments arranged in one direction (for example, the longitudinal direction) are used to reinforce concrete structures and the like. The vegan fiber filaments are filaments arranged in the other direction (horizontal direction), and are fiber filaments for maintaining the shape of the carbon fiber filaments arranged in the longitudinal direction. Therefore, the weft yarn is also called an auxiliary yarn, and the weft yarn can be composed of any fiber as long as the warp yarn does not loosen. In the unidirectional carbon fiber fabric, the longitudinal filaments are denser than the horizontal filaments, that is, the spacing of the longitudinal filaments is smaller than that of the horizontal filaments, and the denier is high.

The carbon fibers constituting the warp yarns used in the present invention preferably have a diameter of 5 to 10 μm, and pitch-based carbon fibers, polyacrylonitrile-based carbon fibers, and the like can be used. The longitudinal filaments used in the present invention are formed by arranging 3000-24000 carbon fibers in parallel, the fineness is preferably 500-20000 denier, and the tensile strength is 1-8GPa, preferably 2-5GPa. The tensile modulus is 100 to 1000 GPa, preferably 200 to 700 GPa. The warp yarn is actually a non-twisted yarn in order to be in a non-twisted shape after spinning. Carbon fiber filaments having the above-mentioned physical properties include, for example, Toreka (registered trademark, manufactured by Toray Co., Ltd.), Pyrofil (registered trademark, manufactured by Mitsubishi Rayon Co., Ltd.), Vesfito (registered trademark, manufactured by Toho Rayon Co., Ltd.) Co., Ltd.) and Granotsuku (registered trademark, manufactured by Nippon Graphite Faiba-(Co., Ltd.)) of various grades.

The warp yarn used in the present invention is usually obtained by sizing 2 to 5 non-twisted carbon fiber yarns, and the fineness of the obtained spun yarn is preferably 1,000 to 40,000 denier.

Several carbon fiber filaments constituting a longitudinal filament can be independent and separated from each other, or can be a single filament without boundaries to each other.

For example, generally available carbon filaments are in a shape-retained state with a setting agent, and when a plurality of such filaments are only joined together, the remaining filaments are independent from each other. If the combined yarn is heated to a temperature above the melting point of the setting agent, the fibers constituting each yarn will loosen, and the boundary with the adjacent yarn will disappear, and then it will be cooled to form a single yarn.

If the filaments constituting a longitudinal yarn are separated from each other independently, the advantage is that the matrix resin is easily impregnated through the gap between the filaments. On the other hand, if it becomes a single wire without a boundary between the wires, it has the advantage that it is not easy to loosen.

The carbon fibers of the warp yarn are usually attached with 0.5 to 2.5% by mass of an epoxy resin-based fixing agent that does not contain a hardener. If the setting agent is less than 0.5% by mass, the warp yarns will have a lot of fuzz in the weaving process, making it difficult to maintain the flat shape of the warp yarns after weaving. If the setting agent is more than 2.5% by mass, impregnation of the fabric with the matrix resin will be hindered and the physical properties of the molded article will be reduced.

The weft yarn is also called auxiliary yarn. In the present invention, any fiber can be used as the weft yarn as long as the weft yarn does not loosen. The fineness of the horizontal yarn is smaller than that of the warp yarn, preferably in the range of 50-600 denier. The fibers of horizontal filaments can be inorganic fibers and organic fibers, such as glass fibers, alumina fibers, aramid fibers, carbon fibers, polyester fibers, spun silk, acrylic fibers, vinylon fibers, and cotton threads , twine, etc. However, the weft yarn is preferably made of a material that does not deform the fabric and has no heat shrinkage when passing through heating and pressing devices such as hot rollers, such as glass fiber, carbon fiber, aramid fiber, and vinylon fiber. The spacing between the horizontal wires is usually 0.5 to 5 cm.

In the unidirectional carbon fiber fabric of the present invention, since the warp yarns and the weft yarns are fixed with thermoplastic resin, when the yarns constituting the warp yarns are separated independently, the holes of the warp yarns can be prevented from being skewed, and the design of the fabric can be maintained. shape.

In order to fix the longitudinal yarn and the horizontal wire, the longitudinal yarn containing thermoplastic resin can be used, the horizontal wire containing thermoplastic resin can also be used, and the above two can also be used. It is best to combine the horizontal wire containing thermoplastic resin and not Resin-containing longitudinal wires are fixed. Any method can be used to contain the thermoplastic resin, for example, impregnating or covering the weft yarn with thermoplastic resin, or attaching powdered thermoplastic resin to the weft yarn, or mixing thermoplastic resin fibers into the weft yarn, Alternatively, the plastic resin fibers are interwoven with the weft yarns or parallel to the weft yarns. The content of the thermoplastic resin is preferably 3 to 10% by mass of the total amount of the weft yarn and the resin.

The thermoplastic resin contained in the weft yarn is preferably melted below a temperature that does not damage the weft yarn. Certainly, a resin having a melting point lower than that of the weft yarn can be used, for example, nylon resin, polyester resin, and polyethylene resin can be used.

In the method for producing a unidirectional carbon fiber fabric of the present invention, an arbitrary number of carbon fibers is spun to form a plurality of non-twisted longitudinal spun yarns. Since any number of yarns are spun, it is easy to set the fineness, width, pitch/width ratio of the obtained warp yarns, the weight per unit area of the fabric, etc., and the degree of freedom in designing the fabric is large.

FIG. 2 shows an example of the form when two flat carbon fiber filaments 1 (the cross-sections are shown) are passed between a pair of reed teeth 8 and 8 to form one longitudinal yarn. When the flat carbon fiber yarns are spun, it is better to connect the flat carbon fiber yarns in a staggered manner as shown in FIG. In this way, the obtained thread is close to the state of one thread, and it is not easy to loosen. In addition, for example, when two carbon fiber yarns of a certain fineness are spun together, if the above-mentioned form is used for spooling, the weight per unit area is not limited to double, and can be made into various weights per unit area, and the degree of design freedom is higher.

In the production method of the present invention, after weaving warp yarns and thermoplastic resin-containing weft yarns, they are passed through heating and pressing devices such as hot rollers to fix the two yarns. The heating temperature must be the temperature at which the thermoplastic resin melts, and the heating temperature is preferably such a temperature: when the spun yarn contains a fixing agent, the viscosity of the fixing agent decreases, and the carbon fiber filaments after the yarn are integrated, The temperature at which the warped yarn tends to become flat. Usually, the heating temperature is 90-120°C, preferably 100-110°C.

In addition, after the warp yarn and weft yarn are woven, the warp yarn when it becomes flat without twisting by a heating and pressing device preferably has a width of 3 to 16 mm and a thickness of 0.1 to 0.6 mm.

In the unidirectional carbon fiber fabric of the present invention, the ratio of the distance between warp yarns to the width of warp yarns is 1.0 to 1.3, the weight per unit area of the fabric is 200 to 1000 g/m ² , and the fiber density is 0.8 to 2.2 g/m2. cm ³ , and the thickness of the fabric is in the range of 0.1 to 0.5 mm.

The fiber density of the woven fabric referred to here is a value defined by the following formula.

Fabric fiber density (g/cm ³ ) = [fabric unit area weight (g/m ² )]/[fabric thickness (mm)]

In addition, fabric basis weight (g/m ² ) and fabric thickness (mm) are values measured in accordance with JIS R7602. In the unidirectional carbon fiber fabric of an embodiment of the present invention, the pitch of the longitudinal yarns is about the same as the width of the longitudinal yarns, so the fiber density of the fabric is large, and the fiber density of a common unidirectional carbon fiber fabric is 0.8g/ cm ³ , while in the present invention it can reach 0.8-2.2 g/cm ³ .

When fabrics with a fiber density within the above range are used, CFRP with high fiber volume content and excellent mechanical properties can be formed even by simple forming methods such as manual lay-up forming or vacuum tire pressure forming.

The unidirectional carbon fiber fabric of the present invention is a fabric in which vertical yarns and horizontal yarns are interlaced, and the weaving structure is not limited to twill weave or satin weave. However, in the fabric of the present invention, the spacing between the wefts is larger than that of the usual fabric, and the perforations tend to be skewed. Therefore, a plain weave is preferable in terms of shape stability.

In addition, in the woven fabric of the present invention, the flat warp yarns are woven at a very thick density, and the wrinkles of the woven yarns are small, so shear deformation is easy. That is, since the woven fabric of the present invention has margins in the intervals of the warp yarns, the width and the intervals of the weave yarns are narrowed during shear deformation and can be greatly deformed without wrinkling.

The unidirectional carbon fiber fabric of the present invention has a large warp yarn fineness and is easily impregnated with a matrix resin, so that a fiber-reinforced plastic molded article with a uniform structure and no voids can be obtained. For example, a reinforced concrete structure can be obtained by forming the fabric of the present invention and a fiber-reinforced plastic layer containing a matrix resin on the surface of a concrete structure.

In the most preferred embodiment, the fabric of the present invention is impregnated with 30-75% by mass (FRP quality standard) of matrix resin to form a fiber-reinforced plastic layer, which is glued to structures such as piers, chimneys, tunnels, walls, floors, etc. On objects, structures can be strengthened.

The reinforced concrete structure of the present invention may have several layers of fiber-reinforced plastic layers stacked on the surface of the structure, or may contain layers other than fiber-reinforced plastic layers such as the bottom layer and uneven material layers between the structure and the fiber-reinforced plastic layers. s material.

Next, a method of reinforcing a concrete structure using the unidirectional carbon fiber fabric of the present invention will be described. First use soapy water or acetone, etc. to clean the oil stains attached to the surface of the concrete structure, and fill the cracks with resin injection, etc., and then, in order to make the concrete and the CFRP containing the carbon fiber fabric of the present invention bond well, after the above treatment Apply the primer on the concrete and let it dry overnight. In addition, the unevenness of the surface can be smoothed with mortar or putty. Next, apply a room-temperature-hardening epoxy resin as a matrix of CFRP, and then lay the carbon fiber fabric of the present invention on top of it, and impregnate the fabric while uniformly distributing the resin with an impregnating roller or a rubber cam. Then apply resin on it, impregnate with impregnating roller or rubber cam, repeat several times as needed. The resin is cured at normal temperature to obtain the reinforced concrete structure of the present invention.

The unidirectional carbon fiber fabric of the present invention can also be impregnated with a matrix resin by a known method to produce a prepreg.

The matrix resins usable in the present invention include, for example, thermoplastic resins and thermosetting resins. Thermosetting resins include epoxy resins, unsaturated polyester resins, polyimide resins, phenolic resins, and the like. These thermosetting resins are B-class in the state of being impregnated in fabrics. In addition, thermoplastic resins usable as matrix resins include nylon resins, polyester resins, polybutylene terephthalate resins, polyetheretherketone (PEEK) resins, bismaleimide resins, and the like. In addition, the amount of thermosetting resin or thermoplastic resin contained in the fabric of the present invention is 30-67% by mass, preferably 34-55% by mass based on the mass of the preform.

Next, an example of the unidirectional carbon fiber fabric of the present invention, its manufacturing method, and a concrete structure reinforced with the fabric will be described. However, the present invention is not limited to this example.

Example 1

Firstly, the fabric manufacturing apparatus used when manufacturing the unidirectional carbon fiber fabric of the present invention by the method of the present invention will be described. In the manufacturing device, as the weft yarn supply device, there are reels, guide rollers, pull rollers, tensioning devices, and rapiers, etc.; and reed. In this embodiment, two carbon fiber filaments constitute one warp yarn, and four reels are provided on the creel of the warp yarn supply device.

First, the weft yarn supply device will be described. On the reel, 200 denier glass fiber filaments are wound. 8% by mass of polymerized nylon filaments were mixed into the glass fibers in order to fuse with the warp yarns. The glass fiber is unwound at a certain speed by the rotation of the pulling roller through the guide roller. The glass fiber filaments pulled out from the pulling roller are hung on the rapier through the guide of the tensioning device.

When the horizontal wire is intermittently inserted into the warp wire by the rapier, the tensioning device elastically absorbs the slack of the glass fiber yarn loosened by the pulling roller at a certain speed, so that it is always in a tensioned state. The rapier is an elongated part arranged at the front of the reed, and moves intermittently in the transverse direction to insert the weft yarn between the warp yarns in the weaving section.

Next, the warp yarn supply device will be described with reference to FIG. 1 . The longitudinal yarn 1 adopted is 4 non-twisted carbon fiber filaments (Toray (Co., Ltd.) トレカ T700SC-12K (the number of carbon fibers is 12000, the fineness is 7200 denier)), on 4 reels 2 1 coil is wound on each. The carbon fiber filaments had a tensile strength of about 5 GPa, a tensile modulus of about 235 GPa, a tensile breaking elongation of 2.1%, and 0.8% by mass of an epoxy-based fixative was adhered.

The carbon fiber filaments 1 are unwound from the reels 2 without being twisted, and pass through the holes of the orifice plate 3 one by one. One heddle 4 is disposed on each carbon fiber filament. Two adjacent heddles guide a carbon fiber yarn for warping through the heddle eye 5 to the reed 6 . In addition, a pair of heddles and another pair of healds adjacent to it are raised and lowered by the driving mechanism, so that the heald eyes have a predetermined height difference, and a supply line is formed between the longitudinal yarns formed on the downstream side of the reed 6 and the longitudinal yarns. The shed through which the horizontal wire 10 passes. The eyelets of the heddles are circular or elongated, so that the interference between adjacent wires and heddles can be reduced.

The reed 6 is configured by arranging a plurality of reed teeth 8 vertically on the frame 7 . Here, four carbon fiber filaments 1 are arranged at a predetermined density, and in the form of FIG. Longitudinal yarn is then guided to the front of the loom.

In the warp yarn supply device, in the same manner as above, a plurality of warp yarns in an untwisted state formed by slicing two fiber yarns each are guided to the cloth fell, and the weft yarn sent from the weft yarn supply device is woven. In silk, plain weave is woven. Then, the nylon yarn contained in the weft yarn is melted by a hot roller heated to 100° C., and the warp yarn and the weft yarn are fixedly bonded to produce a single yarn having non-twisted flat warp yarn 11 as shown in FIG. 3 . Directional carbon fiber fabric.

In addition, since the fixing agent is melted by the above-mentioned heat roller, and the two carbon fiber filaments after being spun are integrated, the spun yarn is not easily unraveled.

The obtained fabric has a density of 2.5 strands/cm, a density of 1.25 strands/cm, a width of 4mm, a vertical spacing/width ratio of 1.0, and a weight per unit area of the fabric. It is 400g/m ² , the fabric thickness is 0.222mm, and the fabric density is 1.8g/cm ³ .

This fabric was impregnated with a room temperature curable resin and cured to produce a CFRP board. At this point, the resin has been fully impregnated. The tensile strength of the obtained CFRP plate is 4200MPa, and the mechanical properties are excellent.

In addition, on the concrete pier, first coat the normal temperature hardening epoxy resin, then wind the carbon fiber fabric obtained above, then coat the epoxy resin, and squeeze it with an impregnation roller to make the fabric easier to impregnate the epoxy resin. After the resin has hardened, there is no visible arch between the formed fiber reinforced plastic layer and the surface of the concrete pier, which can well strengthen the concrete pier.

Comparative example 1

The non-twisted longitudinal yarns adopted in Example 1 are not spun, but used as they are. In order to make the fabric weight per unit area the same as that of Example 1 (400 g/m ² ), the density of the longitudinal yarns used is 5.0 strands/ cm, the density of the horizontal wire is 1/cm, and the width of the longitudinal wire is 2mm. All the other operations were the same as in Example 1 to manufacture a unidirectional carbon fiber fabric with non-twisted warp yarns. The other specifications of the obtained fabric were the same as in Example 1, the warp yarn pitch/warp yarn width ratio was 1.0, the fabric thickness was 0.222 mm, and the fabric density was 1.8 g/cm ³ .

In this fabric, the distance between the warp yarns and the weft yarns is small, so the warp yarns are not flat, and the surface is wavy and uneven.

In addition, a CFRP plate was produced in the same manner as in Example 1 using this fabric. In this case, the resin-impregnated property of the fabric is not good, and the workability is poor. The resulting CFRP plate showed the same tensile strength values as Example 1.

In addition, in the same manner as in Example 1, on the concrete pier, first coat the normal temperature hardening epoxy resin, then wind the carbon fiber fabric of this comparative example, coat the epoxy resin again, and squeeze it with an impregnated roll, but Fabrics are not easily impregnated with epoxy resin. After the resin has hardened, arching can be seen between the resulting fibre-reinforced plastic layer and the concrete piers.

As can be seen from the comparison between Example 1 and Comparative Example, even if the basis weight of the fabric is the same, the surface of the fabric having a large number of warp yarns is flat and uniform. When this fabric is used in a concrete structure, there are few gaps between the two, and they can be closely connected to each other, and the structure can be strengthened more firmly.

Example 2

Using 4 non-twisted carbon fiber filaments (Toray Co., Ltd. トレカ T700SC-24K (the number of carbon fibers is 24000, the fineness is 14400 denier)) as the longitudinal filaments, the tensile strength of the carbon fiber filaments It is about 5 GPa, the modulus of elasticity in tension is about 235 GPa, the degree of elongation at break is 2.1%, and 0.8 mass % of epoxy-based fixing agent is adhered. The rest is the same as in Example 1, and a unidirectional carbon fiber fabric of the present invention having untwisted flat longitudinal yarns is produced.

The obtained fabric has a density of 1.8 strands/cm, a density of 1 strand/cm, a width of 5.4mm, a spacing ratio of 1.02, and a unit area of the fabric. The weight is 600 g/m ² , the fabric thickness is 0.333 mm, and the fabric density is 1.8 g/cm ³ .

Using this fabric, a CFRP plate was produced in the same manner as in Example 1. At this point, the fabric is sufficiently impregnated with resin. The tensile strength of the obtained CFRP plate is 4175MPa, and the mechanical properties are excellent.

In addition, in the same way as in Example 1, on the concrete pier, first coat the normal temperature hardening epoxy resin, then wind the carbon fiber fabric of Example 2, then coat the epoxy resin on it, and squeeze it with an impregnated roll. The fabric is easily impregnated with epoxy resin. After the resin has hardened, no arching can be seen between the formed fiber-reinforced plastic layer and the concrete pier, which can well strengthen the concrete pier.

As can be seen from the above description, in the unidirectional carbon fiber fabric of the present invention, the longitudinal yarns are made of flat carbon fiber yarns in a non-twisted state made of a plurality of carbon fiber yarns, and several are combined. Therefore, Even if the weight per unit area of the fabric is large, it can be well impregnated with matrix resin, and it is a very good unidirectional fabric as a reinforcement material for concrete structures. In addition, the woven fabric of the present invention is easy to manufacture and has good productivity.

In addition, since a plurality of carbon fiber yarns are combined in any shape to form a longitudinal yarn, the fineness of the longitudinal yarn, the width of the longitudinal yarn, the ratio of the distance between the longitudinal yarns and the width of the longitudinal yarn, and the weight per unit area of the fabric are easy to set. , the design freedom of the fabric is large.

Claims (5)

1. unidirectional carbon fiber fabric, constitute by vertical silk and horizontal hair, vertical silk is the carbon fibre tow of the non-sth. made by twisting state that is made of many carbon fibres, it is characterized in that, it should vertical silk be the carbon fibre tow plying thing that the many plying of carbon fibre tow with non-sth. made by twisting form, and this carbon fibre tow plying thing also is non-sth. made by twisting state, and carbon fibre tow plying thing and horizontal hair are affixed with thermoplastic resin.

2. unidirectional carbon fiber fabric as claimed in claim 1 is characterized in that, many carbon fibre tow that constitute above-mentioned carbon fibre tow plying thing are rhizoids that do not have the border to each other.

3. unidirectional carbon fiber fabric as claimed in claim 1 is characterized in that, many carbon fibre tow that constitute above-mentioned carbon fibre tow plying thing are separate separation.

4. the manufacture method of unidirectional carbon fiber fabric uses the non-sth. made by twisting carbon fibre tow that is made of many carbon fibres as vertical silk, as horizontal hair, makes unidirectional carbon fiber fabric with the silk that contains thermoplastic resin, it is characterized in that,

Separate many above-mentioned carbon fibre tow easypro respectively;

With above-mentioned separate the carbon fibre tow that relaxed each with any radical plying, form the carbon fibre tow plying thing of many non-sth. made by twisting states;

With many horizontal hairs by making the semi-finished product fabric between these many carbon fibre tow plying things;

By the heating and pressurizing device, make carbon fibre tow plying thing become the flat of non-sth. made by twisting in this semi-finished product fabric, and make the thermoplastic resin fusing that contains in the horizontal hair, horizontal hair and carbon fibre tow plying thing is affixed.

5. reinforced concrete structure is characterized in that, has carbon fibre reinforced plastics layer on the surface of concrete structure, and this carbon fibre reinforced plastics layer comprises the fabric of each record in the claim 1 to 3.

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