Reinforcing mesh wound body

Abstract

To provide a manufacturing method of a reinforcing mesh which hardly tends to wind when formed into a wound body and is excellent in workability.SOLUTION: A method for manufacturing a biaxial reinforcing mesh composed of a warp yarn 4 and a weft yarn 5 comprises the steps of: obtaining a mesh woven fabric 1 by weaving so as to entangle a heat-fusible yarn such as a thermoplastic resin fiber with at least one of the warp yarn 4 and the weft yarn 5; pressure-bonding the warp yarn 4 and the weft yarn 5 together by subjecting the mesh woven fabric 1 to heat and pressure treatment; and obtaining the reinforcing mesh by coating the pressure-bonded mesh woven fabric 1 with a secondary binder.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a method for manufacturing a reinforcing mesh and a wound body of a reinforcing mesh.

Background Art

[0002] Mortar used for cement products, the outer walls of buildings, etc. is likely to crack due to drying shrinkage. If such cracks are left unattended for a long time, water may penetrate and cause leakage, or the strength may decrease and the mortar may deteriorate. Therefore, attempts have been made to embed a reinforcing mesh in mortar or concrete to prevent the expansion of cracks.

[0003] As an example of such a reinforcing mesh, Patent Document 1 below discloses a crack inhibitor for a cement hardened body, which is a net-like body in which a first thread and a second thread shorter in length than the first thread are combined in a net shape. In Patent Document 1, (tensile rigidity of the first thread) / (tensile rigidity of the second thread) in the net-like body is set to 1.5 to 30.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The reinforcing mesh such as that in Patent Document 1 is assumed to be directly inserted into mortar. The larger the opening of the mesh, the less it is affected by the aggregate in the matrix and the easier it is to construct. Also, in the placement of mortar, since equipment such as a vibrator is used for placement, a strong caulking process is required so that the warp and weft threads of the mesh do not come off even in such an environment. In addition, it is necessary to protect the fiber itself so that the fiber does not unravel and the tensile strength does not decrease.

[0006] In order to solve such problems, usually, a method of increasing the coating amount of the secondary binder for plugging treatment can be considered. However, when the coating amount of the secondary binder is increased, the mesh itself may become hard, or when it is used in the form of a wound body, winding distortion may occur and construction may become difficult. In addition, a method of softening the composition of the secondary binder itself can also be considered. However, in this case, adhesiveness occurs in the secondary binder film, so blocking may occur when it is used in the form of a wound body, and it may be difficult to unwind from the wound body.

[0007] Further, in the secondary binder coating step of the mesh in which a large amount of fibers are arranged in the uniaxial direction and the opening is enlarged as in Patent Document 1, the mesh may become unstable, the warp and weft may meander and be plugged, and a desired tensile strength may not be obtained.

[0008] An object of the present invention is to provide a method for manufacturing a reinforcing mesh that is less likely to cause winding distortion when formed into a wound body and has excellent workability, and a reinforcing mesh wound body formed by winding the reinforcing mesh.

Means for Solving the Problems

[0009] The method for manufacturing a reinforcing mesh according to the present invention is a method for manufacturing a biaxial reinforcing mesh composed of warp and weft. In the method, a mesh fabric is obtained by weaving at least one of the warp and weft so as to entangle a heat-fusible yarn containing thermoplastic resin fibers, and the warp and weft are crimped by subjecting the mesh fabric to heating and pressing treatments. And a step of obtaining a reinforcing mesh by applying a secondary binder to the mesh fabric after the crimping.

[0010] In the present invention, in the step of obtaining the reinforcing mesh, it is preferable to apply the secondary binder so that the loss on ignition of the reinforcing mesh is 0.5% by mass to 10.0% by mass.

[0011] In the present invention, in the step of obtaining the mesh fabric, a first heat-fusible yarn containing a first thermoplastic resin fiber is wound along at least one of the warp yarns and the weft yarns, and a second heat-fusible yarn containing a second thermoplastic resin fiber is wound around at least one of the warp yarns, the weft yarns, and the first heat-fusible yarn so as to be wound around it, thereby winding it. It is preferable that the second heat-fusible yarn further contains inorganic fibers. In the second heat-fusible yarn, the content ratio of the second thermoplastic resin fiber to the inorganic fiber is more preferably 3:7 to 7:3 by mass ratio.

[0012] In the present invention, in the step of obtaining the mesh fabric, the warp yarns and the weft yarns are woven by plain weaving, and at the crossing points of the warp yarns and the weft yarns, the second heat-fusible yarn is wound from one main surface of the mesh fabric toward the other main surface, and from the other main surface of the mesh fabric. It is preferable to wind it back to the one main surface.

[0013] The reinforcing mesh wound body according to the present invention is a reinforcing mesh wound body in which a biaxial reinforcing mesh composed of warp yarns and weft yarns is wound, and the reinforcing mesh contains a secondary binder. When 500 mm is cut out from the reinforcing mesh wound body in the winding direction of the reinforcing mesh and placed on a flat surface, the shortest distance connecting both ends in the winding direction of the reinforcing mesh is 400 mm or more. It is characterized by that.

[0014] In the present invention, the loss on ignition of the reinforcing mesh is preferably 0.5% by mass to 10.0% by mass.

[0015] In the present invention, the maximum interval between rows formed by the warp yarns or the weft yarns is preferably 20 mm or more and 60 mm or less.

[0016] In the present invention, the tensile strength of one row formed by the warp yarns or the weft yarns is preferably 800 N / row or more.

Effects of the Invention

[0017] According to the present invention, there can be provided a method for manufacturing a reinforcing mesh that is less likely to develop winding irregularities when wound into a wound body and has excellent workability, and a reinforcing mesh wound body formed by winding the reinforcing mesh.

Brief Description of the Drawings

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[0019] Hereinafter, preferred embodiments will be described. However, the following embodiments are merely illustrative, and the present invention is not limited to the following embodiments. Also, in each drawing, members having substantially the same function may be referred to by the same reference numerals.

[0020] [Manufacturing Method of Reinforcing Mesh] In the manufacturing method of the reinforcing mesh of the present invention, first, a mesh fabric is obtained by weaving at least one of the warp and weft so as to wind a heat-sealing yarn containing thermoplastic resin fibers (mesh fabric forming step). Next, the warp and weft are crimped by heating and pressing the mesh fabric (crimping step). Next, a secondary binder is applied to the crimped mesh fabric (secondary binder application step). Thereby, a biaxial reinforcing mesh composed of warp and weft can be obtained.

[0021] In the method for manufacturing the reinforcing mesh of the present invention, after weaving at least one of the warp and weft threads so that a heat-fusible thread containing thermoplastic resin fibers is wound around it, heat and pressure treatment is performed. Therefore, the caulking strength of the warp and weft threads can be increased, and the mechanical strength can be increased. Further, since the caulking strength of the warp and weft threads can be increased, the amount of the secondary binder in the subsequent process can be reduced. As a result, the flexibility of the reinforcing mesh can be increased, and it is possible to make it difficult to generate winding distortion. Therefore, even when a uniaxially reinforced mesh having a large opening and a high tensile strength in one row is used, the workability can be improved. Further, by applying a secondary binder, damage to the fiber itself during concrete placement can be prevented, so that a desired tensile strength can be obtained.

[0022] (First Embodiment) FIG. 1 is a schematic plan view showing a mesh fabric used in the method for manufacturing a reinforcing mesh according to the first embodiment of the present invention. FIG. 2 is a schematic plan view showing an enlarged part of the mesh fabric of FIG. 1.

[0023] <Mesh Fabric Forming Step> In the step of forming the mesh fabric 1, first, the warp threads 4 and the weft threads 5 are prepared. In the present embodiment, the fiber bundles constituting the warp threads 4 and the weft threads 5 are both glass fiber bundles. The glass fiber bundle can be obtained by bundling several tens to several thousands of glass fiber monofilaments.

[0024] More specifically, the glass fiber bundle can be obtained by the following method. First, the glass raw material introduced into the glass melting furnace is melted to form molten glass, and after making the molten glass in a homogeneous state, the molten glass is drawn out from a nozzle having heat resistance attached to the bushing. Thereafter, the drawn molten glass is cooled to form glass fiber monofilaments (glass fibers).

[0025] Next, a sizing agent is applied to the surface of this glass fiber. With the sizing agent evenly applied, several tens to several thousands of the glass fibers are aligned and bundled, and then dried to obtain a glass fiber bundle.

[0026] Each of the glass fiber monofilaments constituting the glass fiber bundle preferably contains, as a glass composition, 12 mass% or more of ZrO2 and 10 mass% or more of R2O (R is at least one selected from Li, Na, and K). In this case, the alkali resistance can be further enhanced, and the rigidity can be further enhanced. Note that the fact that R2O is 10 mass% or more means that the total content of Li2O, Na2O, and K2O in the glass fiber monofilament is 10 mass% or more.

[0027] Examples of such glass fiber monofilaments include those containing, as a glass composition, in mass%, 54 - 65% of SiO2, 12 - 25% of ZrO2, 0 - 5% of Li2O, 10 - 17% of Na2O, 0 - 8% of K2O, 0 - 10% of R’O (where R’ represents Mg, Ca, Sr, Ba, Zn), 0 - 10% of TiO2, and 0 - 2% of Al2O3. Preferably, those containing, in mass%, 57 - 64% of SiO2, 14 - 24% of ZrO2, 0 - 3% of Li2O, 10 - 17% of Na2O, 0 - 5% of K2O, 0.2 - 8% of R’O (where R’ represents Mg, Ca, Sr, Ba, Zn), 0.5 - 9% of TiO2, and 0 - 1% of Al2O3 can be used.

[0028] The average diameter of the glass fiber monofilament is preferably 10 μm or more, more preferably 15 μm or more, preferably 30 μm or less, and more preferably 25 μm or less. When the average diameter of the glass fiber monofilament is at least the above-mentioned lower limit value, the rigidity can be further enhanced. When the average diameter of the glass fiber monofilament is at most the above-mentioned upper limit value, the surface area can be further increased, and the adhesiveness with cement or the like can be further enhanced.

[0029] Examples of the sizing agent for bundling glass fiber monofilaments include, for example, polyester resins. The polyester resin may be a saturated polyester resin or an unsaturated polyester resin. Also, it may be a vinyl acetate-based resin, a urethane-based resin, an epoxy resin, or an acrylic resin. These may be used alone or in combination of two or more.

[0030] In addition, the sizing agent preferably further contains a silane coupling agent in addition to the above components. Examples of the silane coupling agent that can be used include aminosilane, epoxysilane, vinylsilane, acrylicsilane, chlorosilane, mercaptosilane, ureidosilane, and the like. By adding the silane coupling agent, the adhesiveness with cement or the like as a matrix can be further enhanced.

[0031] In addition to the above-mentioned silane coupling agent, the sizing agent may contain components such as a lubricant, a nonionic surfactant, a water-soluble polymer, and an antistatic agent, and the blending ratio of each component may be determined as needed. Examples of the water-soluble polymer that can be used include polyvinyl alcohol, polyoxyethylene polyoxypropylene glycol, polyvinyl pyrrolidone, and the like.

[0032] The coating amount of the sizing agent is preferably adjusted so that the loss on ignition of the glass fiber bundle is 0.5% by mass to 2.0% by mass. The loss on ignition can be measured according to JIS R3420 (2013).

[0033] However, the fiber bundles constituting the warp 4 and the weft 5 are not limited to glass fiber bundles, and may be synthetic fiber bundles. Further, the warp 4 and the weft 5 may be constituted by the same fiber bundle as in the present embodiment, or may be constituted by different fiber bundles. Further, they may be constituted by combining a plurality of fibers. For example, the warp 4 may be a glass fiber bundle and the weft 5 may be a synthetic fiber bundle. The warp 4 may be a synthetic fiber bundle and the weft 5 may be a glass fiber bundle. However, from the viewpoint of further enhancing the rigidity, it is preferable that at least one of the warp 4 and the weft 5 contains a glass fiber bundle.

[0034] Examples of the fibers constituting the synthetic fiber bundle include carbon fiber, aramid fiber, vinylon fiber, polyester fiber, polyolefin fiber, and the like. These fibers may be used alone or in combination of a plurality of types. Among them, carbon fiber, aramid fiber, vinylon fiber, and polyolefin fiber are preferable. From the viewpoint of further enhancing the heat resistance, the polyolefin fiber is preferably a polypropylene fiber.

[0035] The count of the fiber bundles constituting the warp 4 and the weft 5 is not particularly limited, but is preferably 100 tex or more and 3000 tex or less. When the count of the fiber bundle is within the above-described range, the rigidity of the obtained reinforcing mesh can be further enhanced.

[0036] Next, the obtained fiber bundles are used as the warp 4 and the weft 5 and woven by plain weaving. At this time, as shown in FIGS. 1 and 2, the warp 4 composed of two warps 4a and 4b is used as one row of warp rows 2, and one weft 5 is used as one row of weft rows 3 for weaving. Then, as shown in FIG. 2, the first heat-sealing yarn 6 is aligned so as to extend in parallel along the warps 4a and 4b and intertwined, and the second heat-sealing yarn 7 is intertwined so as to wind around the two warps 4a and 4b constituting the warp 4 in the extending direction of the warp 4 for weaving. In this way, the mesh fabric 1 can be obtained. In FIG. 1, the description of the first heat-sealing yarn 6 and the second heat-sealing yarn 7 is omitted.

[0037] In addition, the second heat-sealing yarn 7 is preferably entangled so as to go from one main surface of the mesh fabric 1 toward the other main surface at the crossing portion 8 of the warp yarns 4 and the weft yarns 5, and also entangled so as to return from the other main surface of the mesh fabric 1 to one main surface. By doing so, the second heat-sealing yarn 7 can be regularly wound around the warp yarns 4a and 4b, the contact area between the weft yarn 5 and the second heat-sealing yarn 7 can be increased, and the caulking strength of the warp and weft yarns can be further enhanced.

[0038] The first heat-sealing yarn 6 and the second heat-sealing yarn 7 are yarns that are heat-sealed by heating. Note that either one of the first heat-sealing yarn 6 and the second heat-sealing yarn 7 may be provided, but it is preferable that both are provided. In this case, the amount of the secondary binder in the subsequent process can be further reduced.

[0039] The melting points of the first heat-sealing yarn 6 and the second heat-sealing yarn 7 are preferably 70°C or higher and 160°C or lower, respectively. When the melting points of the first heat-sealing yarn 6 and the second heat-sealing yarn 7 are equal to or higher than the above-described lower limit value, caulking can be performed at a relatively low temperature. Further, when the melting points of the first heat-sealing yarn 6 and the second heat-sealing yarn 7 are equal to or lower than the above-described upper limit value, the flexibility of the mesh fabric 1 can be more reliably ensured.

[0040] The first heat-sealing yarn 6 and the second heat-sealing yarn 7 each contain thermoplastic resin fibers. The first heat-sealing yarn 6 and the second heat-sealing yarn 7 may be composed of the same thermoplastic resin fibers or may be composed of other thermoplastic resin fibers.

[0041] The thermoplastic resin fibers can be composed of, for example, polyester, polyamide, polyacrylonitrile, polyvinyl alcohol, polyolefin, etc. Among them, since it has a lower melting point, it is preferably composed of polyester, polyamide, or polyolefin. These resins may be used alone or in combination of multiple types.

[0042] The yarn numbers of the first heat-sealing yarn 6 and the second heat-sealing yarn 7 are not particularly limited, but are preferably 10 dtex or more, more preferably 50 dtex or more, and preferably 600 dtex or less, more preferably 350 dtex or less, respectively. When the yarn numbers of the first heat-sealing yarn 6 and the second heat-sealing yarn 7 are within the above-described ranges, the amount of the secondary binder in the subsequent process can be further reduced.

[0043] The second heat-sealing yarn 7 preferably further contains inorganic fibers. The inorganic fibers are not particularly limited, but are preferably fibers that do not melt at the heating temperature of the second heat-sealing yarn 7. Such inorganic fibers are not particularly limited, and examples thereof include glass fibers, carbon fibers, and mineral fibers, and glass fibers are preferable. In this case, the stop-off strength of the warp yarns 4 and the weft yarns 5 can be further increased. Further, the elongation of the inorganic fibers is smaller (0.1% or more and 5% or less) than that of the thermoplastic resin fibers, and they are likely to be entangled with the warp yarns 4 and the weft yarns 5.

[0044] When the second heat-sealing yarn 7 also contains inorganic fibers, the inorganic fibers and the thermoplastic resin fibers may be a ply yarn, or may simply be arranged side by side.

[0045] Further, in the second heat-sealing yarn 7, the ratio of the content of the thermoplastic resin fibers to the inorganic fibers is preferably 3:7 to 7:3 by mass ratio. In this case, the stop-off strength of the warp yarns 4 and the weft yarns 5 can be further improved.

[0046] The area of the opening 9 in the mesh fabric 1 may be woven, for example, to be 250 mm 2 or more and 2500 mm 2 or less. The maximum interval between the rows of the warp yarn series 2 may be woven, for example, to be 20 mm or more and 60 mm or less. The maximum interval between the rows of the weft yarn series 3 may be woven, for example, to be 20 mm or more and 60 mm or less. Further, the thickness of the mesh fabric 1 is not particularly limited, but may be woven, for example, to be 0.2 mm or more and 1 mm or less.

[0047] <Pressing Process> Next, by subjecting the mesh fabric 1 to heat and pressure treatment, the warp yarns 4 and the weft yarns 5 are thermocompression bonded.

[0048] The heat and pressure treatment can be performed by, for example, a heat press such as a hot roll press or a hot die press. The heat press is preferably performed at a temperature at which the fiber bundles (warp yarns 4 and weft yarns 5) constituting the mesh fabric 1 do not soften. Note that the "temperature at which they do not soften" means a temperature lower than the softening point in the case of a material having a softening point, and a temperature equal to or lower than a temperature corresponding to the softening point in the case of a material having no softening point.

[0049] The temperature of the heat press depends on the type of material constituting the fiber bundle, but is preferably 80°C or higher, more preferably 100°C or higher, and can be preferably 250°C or lower, more preferably 160°C or lower. Also, the pressure of the heat press is preferably 5 N / cm 2 or more, more preferably 7 N / cm 2 or more, and can be preferably 40 N / cm 2 or less, more preferably 15 N / cm 2 or less.

[0050] <Secondary Binder Coating Process> Next, a secondary binder is applied to the mesh fabric 1 after pressing to obtain a reinforcing mesh. As the secondary binder, for example, an acrylic resin, a urethane resin, an epoxy resin, a vinyl acetate resin, a urea resin, a PVC resin, etc. can be used. The secondary binder may be used alone or in combination of a plurality of types.

[0051] The glass transition temperature (Tg) of the secondary binder is not particularly limited, but is preferably -12°C or higher, more preferably -10°C or higher, and is preferably 35°C or lower, more preferably 15°C or lower. In this case, when formed into a wound body, it is possible to make it more difficult for winding marks to occur. Note that it is preferable to use a plurality of types of compounds having different glass transition temperatures as the secondary binder.

[0052] The secondary binder is preferably applied so that the loss on ignition of the resulting reinforcing mesh is 0.5% by mass to 10.0% by mass. In this case, the flexibility of the resulting reinforcing mesh can be further enhanced, and it is possible to further reduce the occurrence of curling. Also, by applying a small amount of the secondary binder, it is possible to prevent damage to the fibers themselves during concrete placement, and it is possible to more reliably obtain the desired tensile strength.

[0053] The loss on ignition of the secondary binder is preferably 1.0% by mass or more, more preferably 3.0% by mass or more, and preferably 8.0% by mass or less, more preferably 6.0% by mass or less. Note that the loss on ignition can be measured in accordance with JIS R3420 (2013).

[0054] In the present embodiment, after weaving the first heat-fused yarn 6 and the second heat-fused yarn 7 around the warp yarn 4, heat treatment and pressure treatment are performed, so that the locking strength of the warp yarn 4 and the weft yarn 5 can be increased, and the mechanical strength can be increased. Also, since the locking strength of the warp yarn 4 and the weft yarn 5 can be increased, the amount of the secondary binder in the subsequent process can be reduced. Thereby, the flexibility of the resulting reinforcing mesh can be increased, and it is also possible to make curling less likely to occur. Therefore, even when a uniaxially reinforced mesh having a large opening 9 and a high tensile strength in one row is used, the workability can be improved. Also, by applying the secondary binder, it is possible to prevent damage to the fibers themselves during concrete placement, and it is possible to obtain the desired tensile strength.

[0055] In the present embodiment, the first heat-fused yarn 6 and the second heat-fused yarn 7 are woven around the warp yarn 4, but the first heat-fused yarn 6 and the second heat-fused yarn 7 may be woven around the weft yarn 5.

[0056] More specifically, the first heat-sealing yarn 6 may be wound along at least one of the warp yarns 4 and the weft yarns 5, and the second heat-sealing yarn 7 may be wound around at least one of the warp yarns 4, the weft yarns 5, and the first heat-sealing yarn 6.

[0057] In the present invention, one of the first heat-sealing yarn 6 and the second heat-sealing yarn 7 may not be provided, and at least one heat-sealing yarn may be provided. Even in that case, the effects of the present invention can be enjoyed.

[0058] (Second Embodiment) FIG. 3 is an enlarged schematic plan view showing a part of a mesh fabric used in the method for manufacturing a reinforcing mesh according to the second embodiment of the present invention.

[0059] In the manufacturing method of the second embodiment, in the mesh fabric forming step, as shown in FIG. 3, six warp yarns 4a, 4b are used as one row of warp yarn rows 2, and one weft yarn 5 is used as one row of weft yarn rows 3 to weave a mesh fabric 21. Further, as shown in FIG. 3, after the first heat-sealing yarn 6 is wound along the warp yarns 4a, 4b so as to extend in parallel, while weaving the warp yarns 4a, 4b and the weft yarn 5 by plain weaving, the second heat-sealing yarn 7 is wound around the warp yarns 4a, 4b so as to be wound around them for weaving. Therefore, in the present embodiment, three sets of warp yarns 4a, 4b around which the second heat-sealing yarn 7 is wound are provided to form the warp yarn row 2. Other points are the same as those in the first embodiment.

[0060] Also in the second embodiment, after weaving so as to wind the first heat-sealing yarn 6 and the second heat-sealing yarn 7 around the warp yarn 4, heat and pressure treatment are performed. Therefore, the obtained reinforcing mesh is less likely to have winding irregularities when formed into a wound body, has excellent workability, and moreover has excellent mechanical strength.

[0061] Therefore, as in the second embodiment, the warp threads 4a and 4b around which the second heat-fusing thread 7 is wound may be provided in a plurality of sets to form the warp thread row 2. In this way, by performing the weaving of the warp threads 4a and 4b and the weft thread 5 and the winding of the second heat-fusing thread 7 almost simultaneously, the time for the mesh fabric forming process can be shortened.

[0062] (Third Embodiment) FIG. 4 is a schematic plan view showing an enlarged part of a mesh fabric used in the method for manufacturing a reinforcing mesh according to the third embodiment of the present invention.

[0063] In the manufacturing method of the third embodiment, in the mesh fabric forming process, as shown in FIG. 4, one warp thread 4 is used as one row of warp thread rows 2, and one weft thread 5 is used as one row of weft thread rows 3 to weave the mesh fabric 31. Further, as shown in FIG. 4, the first heat-fusing thread 6 is wound along the warp thread 4 so as to extend in parallel, and the second heat-fusing thread 7 is wound around the warp thread 4 so as to be wound around it and then woven. Other points are the same as those in the first embodiment.

[0064] Also in the third embodiment, after weaving so as to wind the first heat-fusing thread 6 and the second heat-fusing thread 7 around the warp thread 4, heating and pressing treatments are performed. Therefore, the obtained reinforcing mesh is less likely to have winding irregularities when formed into a wound body, has excellent workability, and also has excellent mechanical strength.

[0065] Therefore, as in the third embodiment, the warp thread row 2 may be formed by winding the first heat-fusing thread 6 and the second heat-fusing thread 7 around one warp thread 4.

[0066] (Fourth Embodiment) FIG. 5 is a schematic plan view showing a mesh fabric used in the method for manufacturing a reinforcing mesh according to the fourth embodiment of the present invention. FIG. 6 is a schematic plan view showing an enlarged part of the mesh fabric used in the method for manufacturing a reinforcing mesh according to the fourth embodiment of the present invention.

[0067] In the fourth embodiment, in the mesh fabric forming step, using the glass fiber bundle prepared in the same manner as in the first embodiment, as shown in FIG. 5, the mesh fabric 41 is obtained by weaving in a twisted manner. At this time, as shown in FIGS. 5 and 6, the warp 44 is formed by intertwining the first strand 44a and the second strand 44b, and the weft 45 is woven into the warp 44 for weaving. Further, as shown in FIG. 6, the first heat-sealing yarn 46 is aligned and intertwined along the first strand 44a, and the second heat-sealing yarn 47 is aligned and intertwined along the second strand 44b for weaving. Other points are the same as those in the first embodiment. In FIG. 5, the description of the first heat-sealing yarn 46 and the second heat-sealing yarn 47 is omitted.

[0068] Also in the fourth embodiment, after weaving so as to intertwine the first heat-sealing yarn 46 and the second heat-sealing yarn 47 with the warp 44, heating and pressurizing treatments are performed. Therefore, the obtained reinforcing mesh is less likely to have winding irregularities when formed into a wound body, is excellent in workability, and also has excellent mechanical strength.

[0069] Therefore, as in the fourth embodiment, the mesh fabric 41 may be obtained by weaving in a twisted manner. However, since the surface area for adhesion by the heat-sealing yarn can be further increased, it is preferable to obtain the mesh fabric by plain weaving as in the first to third embodiments.

[0070] [Reinforcing Mesh Wound Body] FIG. 7 is a schematic diagram showing a reinforcing mesh wound body according to an embodiment of the present invention. Further, FIG. 8 is a schematic plan view showing a reinforcing mesh constituting the reinforcing mesh wound body according to an embodiment of the present invention.

[0071] The reinforcing mesh winding body 10 shown in Fig. 7 is formed by winding the reinforcing mesh 11 shown in Fig. 8. The reinforcing mesh 11 can be manufactured, for example, by the method for manufacturing the reinforcing mesh of the present invention described above. Therefore, the reinforcing mesh 11 contains a secondary binder. The reinforcing mesh 11 can be configured by appropriately using those described in the section on the method for manufacturing the reinforcing mesh. In Fig. 8, the description of the first heat-fusing yarn 6 and the second heat-fusing yarn 7 is omitted.

[0072] When the reinforcing mesh winding body 10 is cut out by 500 mm in the winding direction of the reinforcing mesh 11 and placed on a flat surface, the shortest distance connecting both ends in the winding direction of the reinforcing mesh 11 is 400 mm or more.

[0073] Specifically, as shown in Fig. 9, when the reinforcing mesh 11 is placed on the flat surface 50, it is preferable that the distance L connecting both ends of the main surface 11a on the flat surface 50 side of the reinforcing mesh 11 in the winding direction X is 400 mm or more. In this case, when formed into a winding body, it is possible to make it even more difficult for winding irregularities to occur, and the workability can be further improved.

[0074] From the viewpoint of making it even more difficult for winding irregularities to occur when formed into a winding body and further improving the workability, the distance L is more preferably 420 mm or more, and even more preferably 470 mm or more. The distance L may be at most 500 mm.

[0075] The loss on ignition of the reinforcing mesh 11 is preferably 0.5% by mass or more, more preferably 3.0% by mass or more, preferably 10.0% by mass or less, more preferably 8.0% by mass or less, and even more preferably 6.0% by mass or less. When the loss on ignition of the reinforcing mesh 11 is within the above-described range, it is possible to make it even more difficult for winding irregularities to occur when formed into a winding body, and the workability can be further enhanced. Also, the mechanical strength can be further increased.

[0076] In addition, the maximum interval W between the rows formed by the warp row 2 or the weft row 3 is preferably 20 mm or more, more preferably 25 mm or more, preferably 60 mm or less, and more preferably 55 mm or less. In this case, the workability of the reinforcing mesh 11 can be further improved.

[0077] The tensile strength of one row formed by the warp row 2 or the weft row 3 is preferably 800 N / row or more, more preferably 1000 N / row or more, and preferably 1500 N / row or less. In this case, the mechanical strength of the reinforcing mesh 11 can be further improved. The tensile strength can be measured in accordance with JIS L1015 (2010).

[0078] According to the reinforcing mesh winding body 10 of the present embodiment, it is possible to provide a reinforcing mesh 11 that is less likely to have winding marks, has excellent workability, and also has excellent mechanical strength.

[0079] In addition, the reinforcing mesh winding body 10 and the reinforcing mesh 11 are preferably embedded and used in concrete or mortar, and can be suitably used as a cement reinforcing mesh.

[0080] Hereinafter, the present invention will be described in more detail based on specific examples. The present invention is not limited to the following examples, and can be appropriately modified and implemented without changing the gist thereof.

[0081] (Example 1) First, raw materials were prepared to obtain a glass having a composition of 58.6% by mass of SiO2, 17.3% by mass of ZrO2, 0.1% by mass of Li2O, 15.2% by mass of Na2O, 0.4% by mass of K2O, 0.6% by mass of CaO, 7.6% by mass of TiO2, and 0.2% by mass of Al2O3. The molten glass was drawn into glass fiber monofilaments from a bushing having hundreds to thousands of nozzles.

[0082] Next, a sizing agent in which an aminosilane, an epoxy resin, and a lubricant are dispersed in water was adjusted by an applicator so that the loss on ignition was 0.7% by mass and applied to the surface of the obtained glass fiber monofilament. After bundling the glass fibers, the sizing agent was dried to produce a glass fiber bundle.

[0083] Next, a mesh fabric having the structure shown in FIG. 11 was produced. Specifically, as shown in FIG. 6, warp yarns 44 were formed by intertwining a first strand 44a and a second strand 44b made of the glass fiber bundle obtained by the above method, and three sets of these warp yarns 44 were provided to form one row of warp yarn rows 2 shown in FIG. 11. Also, one weft yarn 45 was used as one row of weft yarn rows 3 shown in FIG. 11, and this weft yarn row 3 was woven into the warp yarn row 2 by interlacing weaving. As shown in FIG. 6, the first heat-fusing yarn 46 was aligned and intertwined along the first strand 44a, and the second heat-fusing yarn 47 was aligned and intertwined along the second strand 44b for weaving.

[0084] As the first heat-fusing yarn 46 and the second heat-fusing yarn 47, a heat-fusing yarn (count: 330 dtex) made of nylon fiber as a thermoplastic resin fiber was used.

[0085] Note that the count of the warp yarns 44 and the weft yarns 45 was 1100 tex. Also, the warp density was 5.0 yarns / inch, and the weft density was 0.83 yarns / inch. The number of heat-fusing yarns (warp heat-fusing yarns) in the warp yarn row 2 was 2 yarns / row, and the number of heat-fusing yarns (weft heat-fusing yarns) in the weft yarn row 3 was 0 yarns / row. Also, the interval a between rows in the warp yarn row 2 and the weft yarn row 3 was 30 mm, and the width b of the mesh fabric was 210 mm.

[0086] Next, the obtained mesh fabric was heated at a temperature of 120°C and a pressure of 10 N / cm 2It was heat-pressed by a heating roller and thermocompression-bonded. Thereafter, the obtained mesh fabric was immersed in a secondary binder. As the secondary binder, a mixture of an acrylic resin having a glass transition temperature of 14°C and an acrylic resin having a glass transition temperature of -10°C was used. After immersion, the mesh fabric was dried to obtain a reinforcing mesh. The secondary binder was applied so that the loss on ignition of the reinforcing mesh was 3.0% by mass. The loss on ignition was measured by the method described in JIS R3420 (2013). The basis weight of the obtained reinforcing mesh was 307 g / m 2 was obtained.

[0087] (Example 2) In Example 2, using the glass fiber bundle obtained in the same manner as in Example 1, a mesh fabric having the structure shown in FIG. 11 was produced. Specifically, as shown in FIG. 3, three sets of warp threads 4 composed of two warp threads 4a and 4b were provided to form a row of warp thread rows 2, and one weft thread 5 was used as a row of weft thread rows 3, and woven by plain weave. Further, as shown in FIG. 3, the first heat-sealing thread 6 was wound along each of the warp threads 4a and 4b so as to extend in parallel, and the second heat-sealing thread 7 was wound around each of the warp threads 4 so as to be wound around and woven.

[0088] As the first heat-sealing thread 6, a heat-sealing thread (count: 330 dtex) made of nylon resin as a thermoplastic resin fiber was used. As the second heat-sealing thread 7, a heat-sealing thread (count: 555 dtex) containing 69% by mass of nylon resin as a thermoplastic resin fiber and 31% by mass of glass fiber as an inorganic fiber was used.

[0089] The number of heat-sealing threads (warp heat-sealing threads) in the warp thread row 2 was three, and the number of heat-sealing threads (weft heat-sealing threads) in the weft thread row 3 was zero. The secondary binder was applied so that the loss on ignition of the reinforcing mesh was 2.0% by mass. In other respects, in the same manner as in Example 1, a reinforcing mesh was obtained. The basis weight of the obtained reinforcing mesh was 298 g / m 2 was obtained.

[0090] The count of the warp thread 4 and the count of the weft thread 5 are the same as the count of the warp thread 44 and the count of the weft thread 45 in Example 1.

[0091] (Example 3) In Example 3, a mesh fabric having the structure shown in FIG. 12 was produced using the glass fiber bundle obtained in the same manner as in Example 1. Specifically, as shown in FIGS. 1 and 2, the warp 4 composed of two warps 4a and 4b was used as a row of warp rows 2, and one weft 5 was used as a row of weft rows 3, and woven by plain weave. Further, as shown in FIG. 2, the first heat-sealing yarn 6 was aligned and wound so as to extend in parallel along the warps 4a and 4b, and the second heat-sealing yarn 7 was wound around the warps 4 constituting the warp row 2 so as to be wound around and woven.

[0092] As the first heat-sealing yarn 6 and the second heat-sealing yarn 7, the same ones as the first heat-sealing yarn 6 and the second heat-sealing yarn 7 in Example 2 were used.

[0093] Note that the count of the warp 4 was 155 tex, and the count of the weft 5 was 320 tex. Also, the warp density was 10 threads / inch, and the weft density was 5 threads / inch. The number of heat-sealing yarns (warp heat-sealing yarns) in the warp row 2 was 3 threads / row, and the number of heat-sealing yarns (weft heat-sealing yarns) in the weft row 3 was 0 threads / row. The interval a between rows in the warp row 2 and the weft row 3 was 5 mm, and the width of the mesh fabric was 210 mm. Further, the secondary binder was applied so that the strong heat loss of the reinforcing mesh was 5.0% by mass. In other respects, a reinforcing mesh was obtained in the same manner as in Example 1. The basis weight of the obtained reinforcing mesh was 135 g / m 2 It was.

[0094] (Example 4) In Example 4, a mesh fabric having the structure shown in FIG. 13 was produced using the glass fiber bundle obtained in the same manner as in Example 1. Specifically, as shown in FIG. 4, one warp 4 was used as a row of warp rows 2, and one weft 5 was used as a row of weft rows 3, and woven by plain weave. Further, as shown in FIG. 4, the first heat-sealing yarn 6 was aligned and wound so as to extend in parallel along the warp 4, and the second heat-sealing yarn 7 was wound around the warp 4 so as to be wound around and woven.

[0095] As the first heat-sealing yarn 6 and the second heat-sealing yarn 7, the same ones as those of the first heat-sealing yarn 6 and the second heat-sealing yarn 7 in Example 2 were used.

[0096] In addition, the count of the warp yarns 4 and the weft yarns 5 was 320 tex. Also, the warp density and the weft density were 5 threads / inch. The number of heat-sealing yarns (warp heat-sealing yarns) in the warp yarn row 2 was 2 threads / row, and the number of heat-sealing yarns (weft heat-sealing yarns) in the weft yarn row 3 was 0 threads / row. The interval a between rows in the warp yarn row 2 and the weft yarn row 3 was 5 mm, and the width of the mesh fabric was 210 mm. Also, the secondary binder was applied so that the strong heat loss of the reinforcing mesh was 4.0 mass%. In other respects, in the same manner as in Example 1, a reinforcing mesh was obtained. The basis weight of the obtained reinforcing mesh was 130 g / m 2 It was.

[0097] (Example 5) In Example 5, using the glass fiber bundle obtained in the same manner as in Example 1, a mesh fabric having the structure shown in FIG. 12 was produced. Specifically, as shown in FIGS. 1 and 2, the warp yarns 4 composed of two warp yarns 4a and 4b were used as one row of warp yarn row 2, and one weft yarn 5 was used as one row of weft yarn row 3, and woven by plain weave. Also, as shown in FIG. 2, the first heat-sealing yarns 6 were aligned and wound so as to extend in parallel along the warp yarns 4a and 4b, and the second heat-sealing yarns 7 were wound around the warp yarns 4 constituting the warp yarn row 2 and woven.

[0098] As the first heat-sealing yarn 6 and the second heat-sealing yarn 7, the same ones as those of the first heat-sealing yarn 6 and the second heat-sealing yarn 7 in Example 2 were used.

[0099] Note that the count of the warp yarn 4 was set to 640 tex. Also, the count of the weft yarn 5 was set to 1400 tex. The warp density was set to 2.4 yarns / inch. Also, the weft density was set to 1.2 yarns / inch. The number of heat-fused yarns (warp heat-fused yarns) in the warp yarn row 2 was set to 3 yarns / row, and the number of heat-fused yarns (weft heat-fused yarns) in the weft yarn row 3 was set to 1 yarn / row. The interval a between rows in the warp yarn row 2 and the weft yarn row 3 was set to 20 mm, and the width of the mesh fabric was set to 210 mm. Also, the secondary binder was applied so that the strong heat loss of the reinforcing mesh would be 8.0 mass%. In other respects, a reinforcing mesh was obtained in the same manner as in Example 1. The basis weight of the obtained reinforcing mesh was 132 g / m 2 It was

[0100] (Comparative Example 1) In Comparative Example 1, using the glass fiber bundle obtained in the same manner as in Example 1, the mesh fabric 71 shown in FIG. 14 was produced. Specifically, one warp yarn 74 was used as one row of warp yarns, and one weft yarn 75 was used as one row of weft yarns, and it was woven by plain weave. Also, as shown in FIG. 14, the cotton yarn 76 was wound around the warp yarn 74 so as to be wound around it and woven

[0101] Note that the warp density was set to 2.25 yarns / inch, and the weft density was set to 1.88 yarns / inch. The interval between rows in the warp yarn row and the weft yarn row was set to 11 mm × 13 mm, and the width of the mesh fabric was set to 210 mm. Also, the secondary binder was applied so that the strong heat loss of the reinforcing mesh would be 21.0 mass%. Also, in Comparative Example 1, heating and pressing treatments were not performed. In other respects, a reinforcing mesh was obtained in the same manner as in Example 1. The basis weight of the obtained reinforcing mesh was 220 g / m 2 It was

[0102] (Comparative Example 2) In Comparative Example 2, using the glass fiber bundle obtained in the same manner as in Example 1, the mesh fabric 81 shown in FIG. 15 was produced. Specifically, three warp yarns 84 were used as one row of warp yarns, and one weft yarn 85 was used as one row of weft yarns, and it was woven by plain weave. Also, as shown in FIG. 15, the cotton yarn 86 was wound around each warp yarn 84 so as to be wound around it and woven

[0103] The warp density was 5.0 threads / inch, and the weft density was 0.83 threads / inch. The interval between columns in the warp row and the weft row was 30 mm, and the width of the mesh fabric was 210 mm. Also, the secondary binder was applied so that the strong heat loss of the reinforcing mesh would be 20.0 mass%. Also, in Comparative Example 2, heat and pressure treatment were not performed. In other respects, a reinforcing mesh was obtained in the same manner as in Example 1. The basis weight of the obtained reinforcing mesh was 332 g / m 2 It was.

[0104] (Comparative Example 3) In Comparative Example 3, using the glass fiber bundle obtained in the same manner as in Example 1, the mesh fabric 91 shown in FIG. 16 was produced. Specifically, the warp 94 was formed by intertwining the first strand 94a and the second strand 94b made of the glass fiber bundle obtained as described above, and the weft 95 made of the glass fiber bundle obtained as described above was woven into the warp 94 to produce a woven fabric by interlacing. Also, heat-fused yarn and cotton yarn were not used.

[0105] The count of the warp 94 was 155 tex, and the count of the weft 95 was 320 tex. Also, the warp density was 10 threads / inch, and the weft density was 5 threads / inch. The interval between columns in the warp row and the weft row was 5 mm, and the width of the mesh fabric was 210 mm. Also, the secondary binder was applied so that the strong heat loss of the reinforcing mesh would be 20.0 mass%. Also, in Comparative Example 3, heat and pressure treatment were not performed. In other respects, a reinforcing mesh was obtained in the same manner as in Example 1. The basis weight of the obtained reinforcing mesh was 153 g / m 2 It was.

[0106] (Comparative Example 4) In Comparative Example 4, a reinforcing mesh was obtained in the same manner as in Comparative Example 3, except that the secondary binder was applied so that the strong heat loss of the reinforcing mesh would be 8.7 mass%. The basis weight of the obtained reinforcing mesh was 137 g / m 2 It was.

[0107] [Evaluation] (Evaluation of Tensile Strength) For the reinforcing meshes obtained in Examples 1 to 5 and Comparative Examples 1 to 4, the tensile strength of one row (one row each of warp and weft) composed of warp and weft was measured respectively. The tensile strength was measured in accordance with JIS L1015 (2010).

[0108] (Evaluation of Coiling Habit) The reinforcing meshes obtained in Examples 1 to 5 and Comparative Examples 1 to 4 were wound up to a winding diameter of 150 mm to obtain a mesh wound body. The obtained reinforcing mesh wound body was stored at 40°C for one month. From the outer layer of the stored reinforcing mesh wound body, a sample with a width of 200 mm and a length of 500 mm was cut out. The cut-out sample was used as the reinforcing mesh 11 shown in FIG. 9 and placed on the flat surface 50. After placement, the distance L connecting both ends of the main surface 11a in the winding direction X on the main surface 11a on the flat surface 50 side of the reinforcing mesh 11 was measured.

[0109] (Evaluation of Sealing Strength) From the reinforcing meshes obtained in Examples 1 to 5 and Comparative Examples 1 to 4, as shown in FIG. 10, a sample was cut out so as to include the intersection 8 of the warp row 2 and the weft row 3, and the warp row 2 and the weft row 3 were fixed to the mounting board 60 with the adhesive 61, and the adhesive strength at the intersection 8 was measured.

[0110] The results are shown in Table 1 below.

[0111]

Table 1

[0112] As is clear from Table 1, it was confirmed that in the reinforcing meshes of Examples 1 to 5, it was difficult for curling to occur and the workability was excellent as compared with Comparative Examples 1 to 4. Further, it was confirmed that the caulking strength was also high in the reinforcing meshes of Examples 1 to 5. Further, when comparing Examples 1 and 2, in which the count and density of the warp threads, the count and density of the weft threads, and the basis weight values were substantially the same, with Comparative Example 2, the tensile strength of Examples 1 and 2 was greater than that of Comparative Example 2. Further, when comparing Example 3, in which the count and density of the warp threads, the count and density of the weft threads, and the basis weight values were substantially the same, with Comparative Example 3, the tensile strength of Example 3 was greater.

Explanation of Signs

[0113] 1, 21, 31, 41… Mesh fabric 2… Warp thread row 3… Weft thread row 4, 4a, 4b, 44… Warp threads 5, 45… Weft threads 6, 46… First heat-sealing thread 7, 47… Second heat-sealing thread 8… Crossing point 9… Opening 10… Reinforcing mesh wound body 11… Reinforcing mesh 11a… Main surface 44a… First strand 44b… Second strand 50… Flat surface 60… Mounting board 61… Adhesive

Claims

1. A reinforcing mesh wound body in which a biaxial reinforcing mesh composed of warp and weft is wound, wherein the reinforcing mesh contains a secondary binder, when 500 mm of the reinforcing mesh is cut out from the reinforcing mesh wound body in the winding direction and placed on a flat surface, the shortest distance connecting both ends in the winding direction of the reinforcing mesh is 400 mm or more. Reinforcing mesh wound body.

2. The reinforcing mesh wound body according to claim 1, wherein the loss on ignition of the reinforcing mesh is 0.5% by mass to 10.0% by mass.

3. The reinforcing mesh wound body according to claim 1 or 2, wherein the maximum interval between columns formed by the warp or weft is 20 mm or more and 60 mm or less.

4. The reinforcing mesh wound body according to any one of claims 1 to 3, wherein the tensile strength of one row formed by the warp or weft is 800 N / row or more.

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