JP2009228160A - Leno cloth for patching and reinforcing, and composite material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a leno cloth suitable as a patching and reinforcing material to give a composite material having excellent shape stability and flexibility of the cloth to facilitate the handling, and having excellent formability and mechanical properties. <P>SOLUTION: The leno cloth 1a for patching and reinforcing is composed of ground warps 2a, 2b, binding warps 3a, 3b and wefts 4a, 4b, 4c, wherein the ground warps 2a, 2b are reinforcing fiber yarns composed of a carbon fiber yarn, the binding warps 3a, 3b and the wefts 4a, 4b, 4c are assisting fiber yarns having a total denier of ≤1/5 of the total denier of the carbon fiber yarn, the carbon fiber yarn and the wefts 4a, 4b, 4c are arranged essentially perpendicular to each other, and the binding warps 3a, 3b are intertwisted with the wefts 4a, 4b, 4c in a manner of integrating the carbon fiber yarns with the binding warps 3a, 3b and forming a leno weave texture. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  INDUSTRIAL APPLICABILITY The present invention uses a tangle woven fabric composed of carbon fiber yarns and auxiliary fiber yarns, which are reinforcing fiber yarns used as repair reinforcing materials for repaired reinforcing bodies such as concrete structures and grounds, and the same. It relates to composite materials.

  For concrete structures such as bridge piers, tunnels, chimneys and buildings, measures for repair and reinforcement and prevention of peeling have become necessary due to the review of seismic standards after many years of use. As a typical method for repairing and reinforcing such a concrete structure, a fiber sheet method is used. This fiber sheet construction method is a construction method in which a fiber sheet is impregnated and solidified on site to repair and reinforce with a composite material made of so-called fiber reinforced plastic (FRP) or to prevent peeling. To repair and reinforce a concrete structure with a fiber sheet and prevent it from peeling off, apply a resin that is a matrix resin for FRP (eg, epoxy resin, urethane resin, acrylic resin, etc.) to the fiber sheet. The coated fiber sheets are laminated, and the fiber sheet is impregnated with a roller or the like so that the resin distribution is uniform, thereby obtaining a composite material. In some cases, a composite material in which a fiber sheet is impregnated with a matrix such as mortar, concrete, and asphalt and solidified is used.

  Examples of the fiber sheet used in such a case include woven fabrics, knitted fabrics, and mesh fabrics. Among them, a representative example of the mesh-like fabric in which the intervals between the reinforcing fiber yarns are widely arranged in a net-like manner is a woven fabric (or a knitted fabric) such as a woven fabric or a woven fabric. Conventionally, as entangled fabrics using reinforcing fiber yarns, fabrics that form an entangled structure only with reinforcing fiber yarns themselves are known (see Patent Document 1 and Patent Document 2). In such entangled fabrics, the reinforcing fiber yarns are crimped (bent), and thus there is a problem that the properties that the reinforcing fiber yarns should originally express cannot be fully utilized.

  In addition, since the intersection of warp yarns and weft yarns is generally thick in leash fabrics, there is a problem that unevenness appears on the surface of the repair and reinforcement material using leash fabrics as a composite material and the appearance is impaired. Furthermore, since the reinforcing fiber yarns such as glass fibers and carbon fibers have almost no stretchability, there is a problem that if the intervals between the reinforcing fiber yarns are wide and arranged in a net shape, they are easily misaligned and the handling property is inferior. In addition to the above, there is a problem in that when it is shaped into the shape of a repaired reinforcement body such as a concrete structure, it becomes dissimilar in the width direction of the woven fabric and is inferior in uniformity and quality.

  On the other hand, from the viewpoint of minimizing the crimping of the weaving yarn, conventionally, efforts have been made to obtain a repair reinforcing material using a plain fabric, a non-crimp yarn fabric or the like (see Patent Documents 3 to 6). .) However, in the above woven structure, the force for restraining the reinforcing fiber yarn is weak, and the formability for matching the shape of the repaired reinforcement body such as the handling property and the concrete structure, particularly the shapeability in the width direction of the fabric. In fact, the above problem has not been solved.

The conventional technologies including the above-mentioned Patent Documents 1 to 6 are not only excellent in the form stability of the fabric, but also excellent in flexibility and handleability, and have a high mechanical property and high productivity. No technology has been found, and a technology for improving these has been craved.
Japanese Utility Model Publication No. 02-106477 Japanese Patent Laid-Open No. 03-028155 JP-A 64-040632 Japanese Patent Laid-Open No. 10-102792 JP 2001-226849 A JP 2001-329466 A

  The object of the present invention is to solve the above-mentioned problems, and in particular, by focusing the carbon fiber yarns of the reinforcing fiber yarns in a wrinkle shape with the auxiliary fiber yarns, not only is it excellent in the form stability of the fabric. For repair reinforcement suitable as a repair reinforcement material, which is excellent in flexibility, handleability, and shapeability (particularly shapeability in the width direction of the fabric) and can provide a composite material that exhibits high mechanical properties. To provide entangled fabrics.

  Another object of the present invention is to provide a repair / reinforcement composite material using the above-described entanglement fabric for repair / reinforcement.

  In order to achieve the above object, the present invention has the following constitution.

  The tangled fabric for repair and reinforcement of the present invention is a woven fabric composed of a warp yarn and a tangled yarn and a weft yarn, wherein the woven warp yarn is a reinforcing fiber yarn composed of carbon fiber yarns, and the tangled warp yarn and the weft yarn are An auxiliary fiber yarn having a total fineness of 1/5 or less of the total fineness of the carbon fiber yarn, and the carbon fiber yarn and the weft yarn are arranged substantially orthogonal to each other, and the carbon A woven fabric for repair and reinforcement in which the tangled yarn is entangled with the weft yarn so that the fiber yarn and the tangled yarn are integrated to form a woven fabric structure.

  According to a preferred aspect of the leash fabric for repair and reinforcement of the present invention, the leno weave structure includes one carbon fiber yarn of the warp yarn as a core yarn, and two auxiliary fiber yarns of the warp yarn as the warp yarn. Is a woven structure in which two tangled yarns intersect with each other on the ground warp yarn and entangle with the auxiliary fiber yarn of the weft yarn.

  According to the preferred embodiment of the leash fabric for repair and reinforcement of the present invention, the leno weave structure is arranged such that one carbon fiber yarn of the warp yarn and one auxiliary fiber yarn of the warp yarn are alternately arranged side by side. And the woven structure in which the tangled yarn is entangled with the auxiliary fiber yarn of the weft.

  According to a preferred aspect of the leash fabric for repair and reinforcement of the present invention, the leno weave structure is configured such that the carbon fiber yarns of the above-mentioned warp yarn are arranged at substantially the same interval, and the interval between them is 1.3. It is a structure in which the auxiliary fiber yarns of the weft yarn are arranged at substantially the same interval.

  According to a preferred embodiment of the tangling fabric for repair and reinforcement of the present invention, the carbon fiber yarn of the warp yarn is aligned with the fiber yarn for squeezing that melts at a temperature at which the auxiliary fiber yarn does not melt or Covering is performed, and the weaving fiber yarn is melted and the woven structure is fixed and fixed.

  According to a preferred aspect of the tangled fabric for repair and reinforcement of the present invention, the auxiliary fiber yarn of the tangled yarn is a processed yarn of polyester fiber, polyamide fiber or polyurethane fiber.

  The repair / reinforcement composite material of the present invention is formed by impregnating a resin into a woven fabric for repair / reinforcement and solidifying it.

  The entangled fabric for repair and reinforcement of the present invention can be obtained by entanglement of the carbon fiber yarn of the warp yarn and the auxiliary fiber yarn whose total fineness is 1/5 or less of the carbon fiber yarn. Furthermore, it is excellent in flexibility, handleability and shapeability (particularly shapeability in the width direction of the fabric), and can easily follow the shape of a repaired reinforcing body such as a concrete structure. This effect can be manifested particularly by converging the carbon fiber yarns so as to form a hook shape with the auxiliary fiber yarns.

  Further, since the reinforcing fiber yarn group composed of carbon fiber yarns is integrated by the auxiliary fiber yarn so that the crimp is suppressed to the minimum, the mechanical properties can be obtained by using the woven fabric for repair and reinforcement of the present invention. It can be set as the composite material which is excellent and can express the high repair reinforcement effect.

  A preferred embodiment of the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic partial plan view showing one embodiment of the entangled fabric for repair and reinforcement of the present invention. FIG. 2 is a partial schematic partial plan view showing the opposite surface of the woven fabric for repair and reinforcement in FIG.

  In FIG. 1 and FIG. 2, the leash fabric 1a for repair and reinforcement according to the present invention includes the warp yarns 2a and 2b made of carbon fiber yarns that are reinforcing fiber yarns arranged in the warp direction, and the total fineness is the above-mentioned reinforcement. It consists of warp yarns 3a, 3b and weft yarns 4a, 4b, 4c made of auxiliary fiber yarns having a total fineness of 1/5 or less of the warp yarns 2a, 2b of the fiber yarns. Further, the tangled fabric 1a for repair and reinforcement is entangled with carbon fiber yarns as the warp yarns 2a and 2b and auxiliary fiber yarns as the tangled warp yarns 3a and 3b and auxiliary fiber yarns as the weft yarns 4a, 4b and 4c. It is woven. By this leno weave structure, the carbon fiber yarns of the warp yarns 2a and 2b and the auxiliary fiber yarns of the warp yarns 3a and 3b are integrated, and three yarns using the carbon fiber yarns of the warp yarns 2a and 2b as the core yarn. A woven tissue is formed. That is, the leno weave structure has carbon fiber yarns as reinforcing fiber yarns as core yarns, and two auxiliary fiber yarns as entangled yarns 3a and 3b are alternately arranged in the weft direction of the carbon fiber yarns. As a result, the weft 4a, 4b, 4c is entangled with the auxiliary fiber yarns.

  Specifically, the leno weave fabric 1a shown in FIGS. 1 and 2 has the leno weave fabric 1a as the entangled warp yarns 3a and 3b using one carbon fiber yarn of the warp yarns 2a and 2b as the core yarn. Two fiber yarns are arranged so as to sandwich the warp yarns 2a, 2b from both sides, and the two entangled warp yarns cross on the warp yarns 2a, 2b on one side of the repair reinforcing leash fabric 1a. This is a woven structure in which the weft yarns 4a, 4b and 4c are entangled with the auxiliary fiber yarns to form a tangled portion. In this leno weave structure, one of the warp yarns 2a and 2b and the two levitated yarns 3a and 3b form one set, and the levitated yarns 3a and 3b are positioned at each of the weft yarns 4a, 4b and 4c. The texture is changed, and entangles are formed between the weft thread 4a and the weft thread 4b and between the weft thread 4b and the weft thread 4c between the warp thread 2a and the ground warp thread 2b.

  1 and 2 includes the above-described carbon fiber yarns of the warp yarns 2a and 2b and the auxiliary fiber yarns of the warp yarns 3a and 3b and the weft yarns 4a, 4b and 4c. Further, the asymmetric fiber yarns 5a and 5b having a melting point lower than that of the auxiliary fiber yarns are used. As shown in FIG. 2, the fiber yarns 5a and 5b for squeezing are aligned with the carbon fiber yarns of the ground warp yarns 2a and 2b, and are auxiliary yarns 3a and 3b as viewed from being integrated with the carbon fiber yarns. Organized with fiber yarns. The fine fiber yarns 5a and 5b for squeezing are melted to stop the leno weave structure. By adopting such an embodiment, the squeezing fiber yarns 5a and 5b can be used for the warp yarns 1a and 3b when viewed from the carbon fiber yarns of the ground warp yarns 2a and 2b. It is possible to perform a function of further suppressing the collapse and unraveling of the structure of the auxiliary fiber yarns or the weft yarns 4a, 4b, and 4c with the auxiliary fiber yarns.

  The fine fiber yarns 5a and 5b are arranged on the surface side in FIG. 2, but may be arranged on the surface side in FIG. In order to further enhance the effect of the awakening, instead of aligning the fiber yarns 5a, 5b for the awakening with the carbon fiber yarns, for example, single covering in the S or Z direction or double covering in the S and Z directions. In this way, after the covering fiber yarn is wound in a spiral shape around the carbon fiber yarn (not shown), the auxiliary fiber yarn can be woven into a woven structure.

  FIG. 3 is a schematic partial plan view showing an embodiment of another repair and reinforcement entangled fabric of the present invention.

  In FIG. 3, the leash fabric 1b for repair and reinforcement is the same as the leash fabric 1a for repair and reinforcement shown in FIGS. 1 and 2, and the auxiliary fiber yarns that are the warp yarns 2c and 2d and the auxiliary fiber yarns that are the warp yarns 3c. And the weft yarns 4d, 4e, and 4f are woven and woven. By this leopard weave structure, the carbon fiber yarns of the ground warp yarns 2c and 2d and the auxiliary fiber yarn of the warp yarn are integrated to form a twine weave texture. That is, the leno weave structure is formed by alternately arranging the carbon fiber yarns of the warp yarns 2c and 2d and the auxiliary fiber yarns of the leno yarn 3c in parallel, and the auxiliary fiber yarns of the weft yarns 4d, 4e and 4f, It is a woven tissue.

  Specifically, the leno weave fabric 1b shown in FIG. 3 has a woven weave structure in which the carbon fiber yarns of the ground warp yarns 2c and 2d and the one auxiliary fiber yarn of the warp yarn 3c are in the weft direction. It is a woven structure in which the tangled yarns 3c are arranged side by side, and the tangled yarns 3c form the tangled portion of the weft yarns 4d, 4e, and 4f on the ground warp yarns 2c and 2d, and are entangled. .

  In this leno weave structure, one of the warp yarns 2c and 2d and one of the warp yarns 3c form one set, and the levitated yarn 3c changes its position for each of the weft yarns 4d, 4e and 4f. However, between the ground warp yarn 2c and the ground warp yarn 2d, a stitch is formed between the weft yarn 4d and the weft yarn 4e and between the weft yarn 4e and the weft yarn 4f.

  3 is not shown in the repair / strengthening leash fabric 1b. However, as shown in FIG. 2, the yarns are aligned with the warp yarns 2c and 2d or covered, as shown in FIG. It is a preferred embodiment to dispose fiber yarns for dowels.

  The woven fabrics 1a and 1b for repair and reinforcement according to the present invention form a woven fabric structure with carbon fiber yarns that are warp yarns themselves, but the total fineness of carbon fiber yarns is at least 5 times that of auxiliary fiber yarns. In the leno weave structure, the auxiliary fiber yarn is bent relatively, and the carbon fiber yarn is hardly crimped or bent, and is reinforced. The carbon fiber yarn, which is a fiber yarn, can fully utilize the characteristics that should be originally expressed.

  In addition, since the thin yarn having a total fineness of 1/5 or less of the reinforcing fiber yarn is used as the auxiliary fiber yarn constituting the tangled yarn and the weft yarn, the crossing point of the warp yarn and the weft yarn in the woven fabric structure is also thick. In other words, the mechanical properties can be minimized.

  In the present invention, from the viewpoint of enhancing the mechanical properties, that is, improving the straightness of the carbon fiber yarn that is a reinforcing fiber yarn, the entangled fabric for repair and reinforcement of the present invention is shown in FIGS. 1 and 2. Preferably, it is a three-fold weave texture. When the woven structure of the woven fabric 1a for repair and reinforcement is a three-folded woven structure as shown in FIGS. 1 and 2, the auxiliary fiber yarns of the warp yarns 3a and 3b entangled with the carbon fiber yarns are sandwiched on both sides of the carbon fiber yarn. In particular, the straightness of the warp direction in the plane of the woven fabric of carbon fiber yarns can be enhanced. As a preferable measure of straightness, the center line of the carbon fiber yarn has an amplitude in the transverse direction with respect to the warp direction within 5 mm, more preferably within 2 mm. When it is in the above range, high strength can be exhibited when the composite material is the effect of the present invention.

  Of course, the twine woven fabric 1b shown in FIG. 3 also uses a thick yarn having a total fineness of at least five times that of the auxiliary fiber yarn as the carbon fiber yarn. The yarn is bent relatively, and the carbon fiber yarn is hardly crimped or bent. However, depending on the interval between the auxiliary fiber yarns of the weft yarns 4d, 4e, and 4f, the three yarns are slightly entangled. The straightness may be inferior compared to. However, a two-stringed weave structure as shown in FIG. 3 can be said to be a preferable embodiment from the viewpoint of productivity because the amount of auxiliary fiber yarn used can be minimized.

  Furthermore, in the woven fabrics 1a and 1b for repair and reinforcement, the carbon fiber yarns constituting the warp yarn are arranged and arranged at substantially the same interval, and the space between the warp yarns is 1.3 to 30 mm. preferable. Specifically, in the woven fabrics 1a and 1b for repair and reinforcement, the distance La between the warp yarns (2a and 2b, 2c and 2d), which are the reinforcing fiber yarns shown in FIGS. However, it is difficult to misalign, and excellent form retention and handling can be realized. From another point of view, the fabric has excellent flexibility (shape followability to the repaired reinforcement). In such a woven fabric for repair and reinforcement, the distance La between the carbon fiber yarns of the warp yarn is preferably 1.3 to 30 mm as described above, more preferably 2 to 20 mm, and still more preferably 3 ~ 15 mm. When the distance La is less than 1.3 mm, the significance of the present invention that realizes excellent form retention and handling properties tends to be reduced. On the other hand, when the distance La exceeds 30 mm, the function of repairing and reinforcing the repair reinforcing material as a woven fabric May not be fulfilled.

  In the entangled fabric for repair and reinforcement of the present invention, in order to maximize the effect, it is preferable that the fabric form is a form having voids toward the front and back sides of the hook or mesh, and the carbon fiber yarn of the ground warp It is preferable that not only the stripes but also the auxiliary fiber yarns of the weft are arranged and arranged at substantially the same interval. More specifically, the weft thread interval is preferably 2 to 50 mm. From this viewpoint, the arrangement density of the carbon fiber yarns as the above-mentioned warp is preferably 0.3 to 8 yarns / cm, more preferably 2 to 7 yarns / cm, and further preferably 3 to 3 yarns / cm. 6 / cm. When the array density of the ground warp yarns is less than 0.3 / cm, the function of repairing and reinforcing the repaired reinforcing material as a leash fabric may not be achieved. On the other hand, when the array density exceeds 8 yarns / cm, the warp yarns When the carbon fiber yarns having a large total fineness are used, not only the significance of the present invention to achieve excellent shape retention and handling properties even if the spacing between the carbon fiber yarns is wide is reduced. In some cases, impregnation with a matrix resin described later may be difficult.

  The arrangement density of the auxiliary fiber yarns as the weft is preferably 0.2 to 5 yarns / cm, more preferably 0.3 to 4 yarns / cm, and further preferably 1 to 3 yarns. / Cm. If the weft yarn density is less than 0.1 / cm, the carbon fiber yarns that are the warp yarns are not sufficiently held, and it is not only possible to realize excellent shape retention and handling properties of the woven fabric for repair and reinforcement. In some cases, the straightness of the warp direction in the plane of the woven fabric of carbon fiber yarns may be impaired. On the other hand, if the arrangement density exceeds 5 / cm, productivity as a woven fabric may be impaired.

  In order to use the woven fabric for repair and reinforcement of the present invention for repair and reinforcement, the carbon fiber yarns as the warp yarns and / or the auxiliary fiber yarns as the weft yarns are structured at substantially the same intervals. preferable. A more preferable embodiment is an embodiment in which both the carbon fiber yarn as the warp yarn and the auxiliary fiber yarn as the weft yarn are organized at substantially the same interval. In such an embodiment, when a leash fabric is made into a product as a scroll, a uniform leash fabric can be obtained wherever it is cut out and used, and a large amount of leash fabric is cut out from the roll and used for repair and reinforcement. It is convenient to use.

  In the present invention, the carbon fiber yarn used as the warp yarn includes polyacrylonitrile (PAN) -based carbon fiber, pitch-based carbon fiber, cellulose-based carbon fiber, and a yarn formed by blending two or more of these. Is given as an example. In the case where the strength and elastic modulus of the composite material are further emphasized, it is preferable to use PAN-based carbon fibers among these.

  Moreover, since the effect of the present invention becomes remarkable when a carbon fiber yarn having a large total fineness is used as a multifilament, the number of filaments of the carbon fiber yarn may be 12,000 to 100,000. More preferably, it is 24,000 to 50,000, and the total fineness is preferably 700 to 8,000 TEX, more preferably 1,500 to 4,000 TEX. Further, such a carbon fiber yarn having a large fineness can be produced at low cost as well as producing a entangled fabric for repair and reinforcement with high productivity. In addition, what is usually called a graphite fiber is included in the carbon fiber said by this invention.

  In addition, as the entangled fabric for repair and reinforcement of the present invention, for example, aramid fibers, polyarylate fibers, polyvinyl alcohol fibers, polyethylene fibers, PBO fibers, glass fibers, SUS, and other metal fibers and ceramics instead of carbon fiber yarns. Reinforcing fiber yarns made of fibers can also be used.

  In the present invention, the auxiliary fiber yarn used as the tangled yarn and the weft yarn has a total fineness of 1/5 or less of the total fineness of the reinforcing fiber yarn. Examples of the auxiliary fiber yarn include glass fiber and polyester. Threads made of synthetic fibers such as fibers, polyamide fibers, aramid fibers, polyarylate fibers, polyvinyl alcohol fibers, polyethylene fibers, PBO fibers and polyurethane fibers are preferably used. In order to reduce the crimp of the reinforcing fiber yarn, it is preferable that the auxiliary fiber yarn has a finer total fineness, preferably 1/10 or less, more preferably 1/20 or less of the total fineness of the reinforcing fiber yarn. Preferably it is. There is no particular lower limit to the fineness of the auxiliary fibers, but if the fineness is too thin, formation of the entangled tissue becomes difficult, and therefore it is preferably 1/500 or more of the fineness of the reinforcing fiber yarn. The lower limit of the total fineness of the auxiliary fiber yarn is not particularly limited, but it is preferably 1/1000 or more of the total fineness of the reinforcing fiber yarn in order to minimize the cause of stopping such as yarn breakage during weaving, More preferably, it is 1/750 or more. From another viewpoint, the total fineness of the auxiliary fiber yarn is preferably 1.5 to 150 TEX, more preferably 3 to 100 TEX, and still more preferably 5 to 50 TEX. With the warp and weft yarns described later, which are composed of auxiliary fiber yarns, the warp yarn used as the warp yarn has a greater adverse effect on productivity when the yarn breaks during weaving, so it is ensured that the yarn breaks during weaving. From the viewpoint of suppressing the yarn, it is preferable to use a yarn having a larger total fineness than the weft yarn.

  In particular, as the auxiliary fiber yarns used for the tangled yarn, those that are less likely to generate fluff during weaving are preferably used because they are woven into a woven fabric. Further, in order to bundle the carbon fiber yarns as the reinforcing fiber yarns so as to form a cocoon shape, the auxiliary fiber yarns having a large stretchability are particularly preferably used. From such a viewpoint, it is preferable to use a synthetic fiber yarn as the auxiliary fiber yarn used for the tangled yarn, and a processed yarn of polyester fiber, polyamide fiber or polyurethane fiber is more preferably used. As the processed yarn capable of increasing the stretchability, a Wool processed yarn is preferable. Among them, a processed yarn of polyester fiber that is particularly inexpensive and excellent in dimensional stability is preferable. On the other hand, from the aspect of weaving, weaving property can be improved by using raw yarn (especially multifilament yarn) in order to improve slippage with a ridge or a guide, and polyester fiber raw yarn or polyamide fiber raw yarn is particularly preferably used. . The number of filaments is preferably 10 to 1,000, more preferably 30 to 400.

  On the other hand, the auxiliary fiber yarn used for the weft is not as severely scratched as the warp yarn, but dimensional stability is extremely important. If the weft dimensions change, the number of reinforcing fiber yarns per unit area (corresponding to the basis weight of the reinforcing fiber yarns) will fluctuate, making it difficult to design the composite material to achieve the desired repair and reinforcement effect Become. From this point of view, it is preferable to use raw fibers (particularly multifilament yarns) that are not processed with glass fibers or synthetic fibers as auxiliary fiber yarns used in the weft direction yarns, and glass fiber yarns are particularly preferably used. . The number of filaments is preferably 10 to 1,000, more preferably 30 to 400.

  It is preferable that the fine fiber yarn for use in the present invention is melted at a temperature at which the auxiliary fiber yarn does not melt. For example, when a yarn made of polyester fiber is used for the auxiliary fiber yarn, a yarn made of fiber having a melting point lower than 255 ° C. of the polyester fiber is preferable, specifically, the melting point is 80 to 200 ° C. Threads composed of low melting point copolyester fiber, copolyamide fiber, polyolefin fiber and the like are preferably used. The number of filaments is preferably 1 (monofilament) to 100, more preferably 5 to 50.

  From another viewpoint, when glass fibers are used for the auxiliary fiber yarns, normal polyester fibers having a melting point of 255 ° C. can be used for the fine fiber yarns.

  The composite material of the present invention is obtained by impregnating the above-mentioned entangled fabric for repair and reinforcement with mortar, concrete, asphalt or resin and solidifying it. According to the above-described entangled fabric for repair and reinforcement, a composite material having excellent flexibility (form followability to repaired reinforcing material), handleability and formability, and excellent mechanical properties can be obtained.

  The composite material of the present invention is used to repair and reinforce repaired reinforcing materials, and is applied to the surface for repairing and reinforcing concrete structures, buildings, grounds and embankments, preventing concrete and bedrock from peeling off, and waterproofing. In addition to being used as a repair reinforcement, it is also possible to form a composite material as a repair reinforcement by burying a tangled fabric for repair and reinforcement in mortar, concrete, asphalt or resin.

  A particularly preferable embodiment in which the composite material of the present invention is used is one in which the intervals between carbon fiber yarns are wide and arranged in a hook shape. When used in the manner as described above, the significance of using the entangled fabric and composite material for repair and reinforcement of the present invention is the highest, and in particular, it is excellent in shapeability in the width direction of the fabric and has an excellent effect. is there.

  Hereinafter, the present invention will be described more specifically with reference to examples. In the examples of the present invention, the following materials were used.

Reinforcing fiber yarn: Carbon fiber yarn ("Torayca" (registered trademark) manufactured by Toray Industries, Inc., tensile strength 4,900 MPa, tensile elastic modulus 230 GPa, number of filaments 24,000, total fineness 1,650 TEX)
-Auxiliary fiber yarn 1: Glass fiber (ECE225 1/0 1.0Z, Nittobo Co., Ltd., 200 filaments, total fineness 22.5 TEX)
Auxiliary fiber yarn 2: Wool-processed yarn of polyester fiber (“Tetron” (registered trademark) manufactured by Toray Industries, Inc., 18 filaments, total fineness 5.6 TEX, melting point 255 ° C.)
Auxiliary fiber yarn 3: Raw polyester fiber yarn ("Tetron" (registered trademark) manufactured by Toray Industries, Inc., 18 filaments, total fineness 5.6 TEX, melting point 255 ° C)
・ Fiber yarn for co-strain: Copolymer polyamide fiber yarn ("Elder" (registered trademark) manufactured by Toray Industries, Inc., 10 filaments, total fineness 5.6 TEX, melting point 110 ° C)
-Room temperature curing type epoxy resin: “TS Resin (W)” (registered trademark) manufactured by Toray Industries, Inc.
Example 1
First, the carbon fiber yarn that is the above-mentioned reinforcing fiber yarn is covered as the warp yarn by covering the above-mentioned fiber yarn for squeezing (250 turns / m, S direction), and the squeezed carbon fiber yarn is formed. Prepared. One set of carbon fiber yarns (arrangement density 1.9 / cm) and two auxiliary fiber yarns 2 (arrangement density 3.8 / cm) were entangled into one set. The warp yarns and the auxiliary fiber yarns 1 were weft yarns (arrangement density 1 / cm), and weaved by forming a triple weave structure as shown in FIGS. The weaving machine was heated to a temperature of 150 ° C. after weaving and before winding of the loom, and only the fiber yarns for crushing were melted to crush the fabric.

  The obtained woven fabric for unidirectional repair / reinforcement has a woven structure consisting of three carbon fiber yarns and two auxiliary fiber yarns 2 as tangled carbon fibers. Not only was it flexible. In addition, the woven structure was squeezed by three fibers by the squeezing fiber yarns, and the structure breakage during handling and the unraveling during cutting were suppressed.

  Next, using the above-mentioned three-piece woven fabric and the above-mentioned room temperature curing type epoxy resin, it is shaped so as to bend in the width direction of the woven fabric when it is turned to a cylinder by hand lay-up. The composite material was then molded. The above-mentioned three-piece woven fabric is bundled so that the carbon fiber yarns are hooked with the auxiliary fiber yarns 2 having a large stretchability, and particularly when the fabric is bent in the width direction. The shape was very good, and the carbon fiber yarn could be neatly oriented, and its straightness was also very good (the center line of the carbon fiber yarn had an amplitude of 2 mm in the transverse direction with respect to the warp direction). Within). Therefore, as a result, a composite material having very excellent quality was obtained.

(Example 2)
One set of the above carbon fiber yarns (arrangement density 5.8 yarns / cm) as a warp yarn, and one of the above auxiliary fiber yarns 3 (arrangement density 5.8 yarns / cm) as a tangled yarn. The warp yarn and the above-mentioned auxiliary fiber yarn 3 were used as weft yarn (array density 3 / cm), and weaved by forming a twined weave structure as shown in FIG.

  The obtained woven fabric for unidirectional repair and reinforcement is composed of two carbon fiber yarns and one of the auxiliary fiber yarns 3 of the warp yarns, and the weft yarn arrangement density is as in Example 1. By increasing the height, not only the form retention and handling properties, but also the flexibility was excellent. However, since the fiber yarn for squeezing was not used, the structural deformation at the time of handling and the unraveling at the time of cutting were seen from Example 1.

  Next, a composite material was formed in the same manner as in Example 1 using the above-mentioned two-string fabric. The above-mentioned two-string fabric uses the auxiliary fiber yarns 3 having low stretchability, but the weft yarn arrangement density is higher than that of Example 1, so that the carbon fiber is slightly inferior to Example 1. The yarns were converged so as to have a cocoon shape, and were excellent in formability when the width direction of the woven fabric was bent, and the carbon fiber yarns could be oriented, and their straightness was also excellent. Therefore, as a result, a composite material having very excellent quality was obtained.

(Comparative Example 1)
In Example 1, the auxiliary fiber yarn 2 is used not as a tangled yarn but as a warp yarn without using the squeezing fiber yarn, and the woven structure formed by the weft yarn of the auxiliary fiber yarn 1 is taken from the tangled woven structure. A carbon fiber plain woven fabric was obtained in the same manner as in Example 1 except that the plain woven fabric was used. In the obtained plain woven fabric, the auxiliary fiber yarns 1 and the auxiliary fiber yarns 2 were not entangled, but the carbon fiber yarns were easily misaligned because of the plain woven structure, and the shape retention and handling properties were poor.

Next, a composite material was molded in the same manner as in Example 1 using the carbon fiber plain fabric. When the epoxy resin is impregnated by hand layup, the auxiliary fiber yarns 1 and the auxiliary fiber yarns 2 have a plain weave structure, so that the carbon fiber yarns are likely to be disturbed, and the width direction of the woven fabric as compared with Examples 1 and 2 In addition to being inferior in formability when bent, the carbon fiber yarn could not be neatly oriented and its straightness was also inferior. Therefore, the quality of the composite material obtained as a result was inferior.
(Comparative Example 2)
In Example 2, entangled warp and weft yarns from auxiliary fiber yarn 3 to carbon fiber yarn 2 ("Torayca" (registered trademark) manufactured by Toray Industries, Inc., tensile strength 3,450 MPa, tensile elastic modulus 230 GPa, filament number 6,000 A woven fabric made of carbon fiber yarns was obtained in the same manner as in Example 2 except that the total fineness was 400TEX. Since the obtained woven fabric uses carbon fiber yarns having the same total fineness as the weft yarn, the intersection between the tangled yarn and the weft yarn becomes thicker and the unevenness of the fabric becomes larger. In addition, the carbon fiber yarns were easily misaligned unless they were awakened, and the form retention and handling properties were poor.

  Next, a composite material was molded in the same manner as in Example 1 by using a woven fabric made of the above carbon fiber yarn. When impregnating with epoxy resin by hand lay-up, the carbon fiber yarns were only entangled and woven, so the carbon fiber yarns were not easily disturbed, but the reinforcing fiber yarns were in the weft direction and thickness direction of the fabric at the intersection. Both of them were crimped and inferior in straightness. Therefore, as a result, the characteristics that the carbon fiber yarn should originally express cannot be fully utilized. Further, compared to Example 1 and Example 2, since carbon fiber yarn having the same total fineness as the warp yarn is used, it is rigid in the weft direction, and shaping when the width direction of the woven fabric is bent. Not only was it inferior in nature, but the crossing point of the warp and weft was thick and the irregularities were large.

  According to the entangled fabric for repair and reinforcement of the present invention, the flexibility, handleability and shapeability of the fabric (especially in the width direction of the fabric), particularly by concentrating the carbon fiber yarns in a wrinkle shape with the auxiliary fiber yarns. Composite materials with excellent mechanical properties and mechanical properties. Therefore, mortar, concrete and asphalt, including repair and reinforcement materials to be applied to surfaces such as repair and reinforcement of concrete structures, buildings, grounds and embankments, etc. Alternatively, it is particularly suitable as a repair / reinforcing material to be buried in a resin or the like, and is useful as a repair / reinforcing material in the field of civil engineering and construction, particularly in the construction field.

FIG. 1 is a schematic partial plan view showing one embodiment of the entangled fabric for repair and reinforcement of the present invention. FIG. 2 is a partial schematic partial plan view showing an opposite surface of the tangled fabric for repair and reinforcement in FIG. 1. FIG. 3 is a partial schematic plan view showing an embodiment of another repair and reinforcement entangled fabric of the present invention.

Explanation of symbols

1a, 1b Tangle fabric for repair and reinforcement 2a, 2b, 2c, 2d Warp yarn 3a, 3b, 3c Warp yarn 4a, 4b, 4c, 4d, 4e, 4f Weft yarn 5a, 5b Fiber thread for claw La Lap warp Interval

Claims (8)

  In a woven fabric composed of warp yarn and weft yarn, the warp yarn is a reinforcing fiber yarn made of carbon fiber yarn, and the tangled yarn and weft yarn is 1 of the total fineness of the carbon fiber yarn. / 5 or less auxiliary fiber yarn having a total fineness, and the carbon fiber yarn and the weft yarn are arranged substantially orthogonal to each other, and the carbon fiber yarn and the tangled yarn are A tangled fabric for repair and reinforcement, wherein the tangled warp yarns are entangled with the weft yarns so as to be integrated to form a woven tissue structure.   The leno weave structure is arranged such that one carbon fiber yarn of the warp yarn is used as a core yarn, and two auxiliary fiber yarns of the levitated yarn are arranged so as to sandwich the warp yarn from both sides, and the entangled yarn The entangled fabric for repair and reinforcement according to claim 1, wherein two woven fabrics intersect each other on the warp yarn and entangle with the weft auxiliary fiber yarn.   In the leno weave structure, one carbon fiber yarn of the warp yarn and one auxiliary fiber yarn of the warp yarn are alternately arranged side by side, and the entangled yarn is entangled with the auxiliary fiber yarn of the weft yarn The entangled fabric for repair and reinforcement according to claim 1, which has a woven structure.   The woven fabric for repair and reinforcement according to any one of claims 1 to 3, wherein the carbon fiber yarns of the ground warp are arranged and arranged at substantially the same intervals, and the intervals are 1.3 to 30 mm.   The woven fabric for repair and reinforcement according to any one of claims 1 to 4, wherein the auxiliary fiber yarns of the weft are arranged and arranged at substantially the same interval.   A weaving fiber yarn, which is melted at a temperature at which the auxiliary fiber yarn does not melt, is aligned or covered with the carbon fiber yarn of the warp yarn, and the weaving fiber yarn is melted and then woven. The entangled fabric for repair and reinforcement according to any one of claims 1 to 5, wherein the tissue is fastened and fixed.   The entangled fabric for repair and reinforcement according to any one of claims 1 to 6, wherein the auxiliary fiber yarn of the tangled yarn is a processed yarn of polyester fiber, polyamide fiber or polyurethane fiber.   A composite material for repair and reinforcement obtained by impregnating and solidifying a woven fabric for repair and reinforcement according to any one of claims 1 to 7.

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