Reinforcement mesh winding

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 reinforcing mesh winding body. [Background technology]

[0002] Mortar, used in cement products and building exteriors, is prone to cracking due to drying shrinkage. If these cracks are left untreated for extended periods, water can seep in, leading to leaks, and the mortar may deteriorate due to a decrease in strength. Therefore, attempts are being made to prevent crack expansion by embedding reinforcing mesh in the mortar or concrete.

[0003] As an example of such a reinforcing mesh, Patent Document 1 discloses a crack suppression material for cement hardened materials, 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-like manner. In Patent Document 1, the ratio of (tensile stiffness of the first thread) to (tensile stiffness 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] Japanese Patent Publication No. 2009-126730 [Overview of the project] [Problems that the invention aims to solve]

[0005] Reinforcing meshes like the one in Patent Document 1 are intended to be directly inserted into mortar, and the larger the openings in the mesh, the less they are affected by the aggregate in the matrix, making installation easier. Furthermore, since mortar is poured using equipment such as vibrators, a strong sealing treatment is required to prevent the warp and weft threads in the mesh from coming loose even in such an environment. In addition, protection of the fibers themselves is necessary to prevent them from unraveling and losing tensile strength.

[0006] To solve these problems, one common approach is to increase the amount of secondary binder applied during the sealing process. However, increasing the amount of secondary binder can cause the mesh itself to harden, or, when used in a wound form, can lead to curling, making installation difficult. Another approach is to soften the composition of the secondary binder itself. However, in this case, the secondary binder film becomes sticky, which can cause blocking when used in a wound form, making it difficult to unwind.

[0007] Furthermore, as described in Patent Document 1, in a secondary binder coating process for a mesh in which a large number of fibers are arranged in one axis direction and the openings are large, the mesh becomes unstable, the warp and weft threads meander and are sealed, and the desired tensile strength may not be obtained.

[0008] The object of the present invention is to provide a method for manufacturing a reinforcing mesh that is less prone to developing a curling habit when wound into a rolled body and has excellent workability, and a reinforcing mesh rolled up by winding the reinforcing mesh. [Means for solving the problem]

[0009] The present invention relates to a method for manufacturing a reinforcing mesh, characterized in that it is a method for manufacturing a biaxial reinforcing mesh composed of warp threads and weft threads, comprising the steps of: obtaining a mesh fabric by weaving such that a heat-fusible yarn containing thermoplastic resin fibers is entangled with at least one of the warp threads and weft threads; compressing the warp threads and weft threads by heating and pressurizing the mesh fabric; and obtaining a reinforcing mesh by applying a secondary binder to the mesh fabric after compression.

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

[0011] In the present invention, in the process of obtaining the mesh fabric, it is preferable to entangle a first heat-fusible yarn containing a first thermoplastic resin fiber along at least one of the warp and weft threads, and to entangle a second heat-fusible yarn containing a second thermoplastic resin fiber by wrapping it around at least one of the warp threads, the weft threads, and the first heat-fusible yarn. It is preferable that the second heat-fusible yarn further contains inorganic fibers. It is more preferable that the ratio of the content of the second thermoplastic resin fiber to the inorganic fiber in the second heat-fusible yarn is 3:7 to 7:3 by mass.

[0012] In the present invention, in the process of obtaining the mesh fabric, it is preferable to weave the warp and weft threads in a plain weave, and to entangle the second heat-fusible yarn at the intersection of the warp and weft threads so as to move from one main surface of the mesh fabric toward the other main surface, and then entangle it so as to move from the other main surface of the mesh fabric toward the one main surface.

[0013] The reinforcing mesh winding body according to the present invention is a reinforcing mesh winding body formed by winding a biaxial reinforcing mesh composed of warp threads and weft threads, wherein the reinforcing mesh includes a secondary binder, and when the reinforcing mesh is cut out 500 mm in the winding direction from the reinforcing mesh winding body and placed on a flat surface, the shortest distance connecting the two ends of the reinforcing mesh in the winding direction is 400 mm or more.

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

[0015] In the present invention, it is preferable that the maximum spacing between rows formed by the warp or weft threads is 20 mm or more and 60 mm or less.

[0016] In the present invention, it is preferable that the tensile strength of one row composed of the warp or weft threads is 800 N / row or more. [Effects of the Invention]

[0017] According to the present invention, there can be provided a method for producing a reinforcing mesh that is less prone to curling when formed 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

[0018] [Figure 1] Figure 1 is a schematic plan view showing a mesh fabric used in the method for producing a reinforcing mesh according to the first embodiment of the present invention. [Figure 2] Figure 2 is an enlarged schematic plan view showing a part of a mesh fabric used in the method for producing a reinforcing mesh according to the first embodiment of the present invention. [Figure 3] Figure 3 is an enlarged schematic plan view showing a part of a mesh fabric used in the method for producing a reinforcing mesh according to the second embodiment of the present invention. [Figure 4] Figure 4 is an enlarged schematic plan view showing a part of a mesh fabric used in the method for producing a reinforcing mesh according to the third embodiment of the present invention. [Figure 5] Figure 5 is a schematic plan view showing a mesh fabric used in the method for producing a reinforcing mesh according to the fourth embodiment of the present invention. [Figure 6] Figure 6 is an enlarged schematic plan view showing a part of a mesh fabric used in the method for producing a reinforcing mesh according to the fourth embodiment of the present invention. [Figure 7] Figure 7 is a schematic view showing a reinforcing mesh wound body according to an embodiment of the present invention. [Figure 8] Figure 8 is a schematic plan view showing a reinforcing mesh constituting a reinforcing mesh wound body according to an embodiment of the present invention. [Figure 9] Figure 9 is a view for explaining a method for evaluating curling of a reinforcing mesh. [Figure 10] Figure 10 is a view for explaining a method for evaluating sizing strength of a reinforcing mesh. [Figure 11]Figure 11 is a schematic diagram illustrating the structure of the mesh fabric produced in Examples 1 and 2. [Figure 12] Figure 12 is a schematic diagram illustrating the structure of the mesh fabric produced in Examples 3 and 5. [Figure 13] Figure 13 is a schematic diagram illustrating the structure of the mesh fabric produced in Example 4. [Figure 14] Figure 14 is a schematic plan view showing an enlarged portion of the mesh fabric used in the manufacturing method of the reinforcing mesh in Comparative Example 1. [Figure 15] Figure 15 is a schematic plan view showing an enlarged portion of the mesh fabric used in the manufacturing method of the reinforcing mesh in Comparative Example 2. [Figure 16] Figure 16 is a schematic plan view showing an enlarged portion of the mesh fabric used in the manufacturing methods for the reinforcing mesh in Comparative Examples 3 and 4. [Modes for carrying out the invention]

[0019] Preferred embodiments are described below. However, the following embodiments are merely illustrative, and the present invention is not limited to these embodiments. In addition, in each drawing, components having substantially the same function may be referred to by the same reference numerals.

[0020] [Method for manufacturing reinforcing mesh] In the present invention's method for manufacturing a reinforcing mesh, first, a mesh fabric is obtained by weaving such that a heat-fusible yarn containing thermoplastic resin fibers is entangled with at least one of the warp and weft threads (mesh fabric formation step). Next, the warp and weft threads are compressed together by heating and pressurizing the mesh fabric (compression step). Next, a secondary binder is applied to the compressed mesh fabric (secondary binder application step). As a result, a biaxial reinforcing mesh composed of warp and weft threads can be obtained.

[0021] In the present invention's method for manufacturing reinforcing mesh, heat-fusible yarn containing thermoplastic resin fibers is entangled with at least one of the warp and weft threads during weaving, followed by heating and pressurizing treatment. This increases the sealing strength of the warp and weft threads, thereby increasing mechanical strength. Furthermore, because the sealing strength of the warp and weft threads is increased, the amount of secondary binder used in subsequent processes can be reduced. This increases the flexibility of the reinforcing mesh, making it less prone to curling. Consequently, even when using a uniaxially reinforced mesh with large openings and high tensile strength per row, workability can be improved. Additionally, by applying a secondary binder, damage to the fibers themselves during concrete placement can be prevented, thus achieving the desired tensile strength.

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

[0023] <Mesh Fabric Formation Process> In the process of forming the mesh fabric 1, first, warp threads 4 and weft threads 5 are prepared. In this embodiment, the fiber bundles that make up both the warp threads 4 and the weft threads 5 are glass fiber bundles. Glass fiber bundles can be obtained by bundling together several tens to several thousand glass fiber monofilaments.

[0024] More specifically, glass fiber bundles can be obtained by the following method. First, glass raw materials are placed in a glass melting furnace and melted to form molten glass. After the molten glass is made homogenized, the molten glass is drawn out through a heat-resistant nozzle attached to a bushing. Then, the drawn-out molten glass is cooled to form glass fiber monofilaments (glass fibers).

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

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

[0027] Such glass fiber monofilaments can be, for example, those containing, by mass%, SiO25 4-65%, ZrO2 12-25%, Li2O 0-5%, Na2O 10-17%, K2O 0-8%, R'O (where R' represents Mg, Ca, Sr, Ba, Zn) 0-10%, TiO2 0-10%, and Al2O 30-2%, preferably containing, by mass%, SiO25 7-64%, ZrO2 14-24%, Li2O 0-3%, Na2O 10-17%, K2O 0-5%, R'O (where R' represents Mg, Ca, Sr, Ba, Zn) 0.2-8%, TiO2 0.5-9%, and Al2O 30-1%.

[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 above the lower limit mentioned above, the rigidity can be further increased. When the average diameter of the glass fiber monofilament is below the upper limit mentioned above, the surface area can be further increased, and the adhesion to cement and the like can be further improved.

[0029] Examples of sizing agents used when bundling glass fiber monofilaments include polyester resin. The polyester resin may be saturated or unsaturated. Alternatively, vinyl acetate resin, urethane resin, epoxy resin, or acrylic resin may be used. These may be used individually or in combination.

[0030] Furthermore, it is preferable that the sizing agent also contains a silane coupling agent in addition to the above-mentioned components. Examples of silane coupling agents that can be used include aminosilane, epoxysilane, vinylsilane, acrylicsilane, chlorsilane, mercaptosilane, and ureidosilane. Adding a silane coupling agent can further enhance adhesion to the matrix, such as cement.

[0031] Furthermore, in addition to the silane coupling agent mentioned above, the sizing agent may contain other components such as lubricants, nonionic surfactants, water-soluble polymers, and antistatic agents, and the mixing ratio of each component can be determined as needed. Examples of water-soluble polymers that can be used include polyvinyl alcohol, polyoxyethylene polyoxypropylene glycol, and polyvinylpyrrolidone.

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

[0033] However, the fiber bundles constituting the warp threads 4 and weft threads 5 are not limited to glass fiber bundles, but may be synthetic fiber bundles. Furthermore, the warp threads 4 and weft threads 5 may be composed of the same fiber bundle, as in this embodiment, or they may be composed of different fiber bundles. They may also be composed of a combination of multiple fibers. For example, the warp threads 4 may be glass fiber bundles and the weft threads 5 may be synthetic fiber bundles. Alternatively, the warp threads 4 may be synthetic fiber bundles and the weft threads 5 may be glass fiber bundles. However, from the viewpoint of further enhancing rigidity, it is preferable that at least one of the warp threads 4 and weft threads 5 contains glass fiber bundles.

[0034] Examples of fibers that make up the synthetic fiber bundle include carbon fibers, aramid fibers, vinylon fibers, polyester fibers, and polyolefin fibers. These fibers may be used individually or in combination. Among these, carbon fibers, aramid fibers, vinylon fibers, and polyolefin fibers are preferred. From the viewpoint of further improving heat resistance, polyolefin fibers are preferably polypropylene fibers.

[0035] The yarn count of the fiber bundles constituting the warp threads 4 and weft threads 5 is not particularly limited, but is preferably between 100 tex and 3000 tex. When the yarn count of the fiber bundles is within the above range, the rigidity of the resulting reinforcing mesh can be further enhanced.

[0036] Next, the obtained fiber bundles are used as warp threads 4 and weft threads 5 to weave in a plain weave. In this process, as shown in Figures 1 and 2, the warp threads 4, consisting of two warp threads 4a and 4b, are arranged as one warp row 2, and the single weft thread 5 is arranged as one weft row 3. After that, as shown in Figure 2, the first heat-fusible yarn 6 is aligned so that it extends parallel to the warp threads 4a and 4b. And the weft thread 5 and The second heat-fusible yarn 7 is intertwined with the two warp threads 4a and 4b that make up the warp threads 4, in the direction in which the warp threads 4 extend. , around warp threads 4a, 4b The yarns are intertwined and woven together. In this way, a mesh fabric 1 can be obtained. Note that in Figure 1, the first heat-fusible yarn 6 and the second heat-fusible yarn 7 are not shown.

[0037] Furthermore, it is preferable that the second heat-fusible yarn 7 be entangled at the intersection points 8 of the warp threads 4 and weft threads 5, moving from one main surface of the mesh fabric 1 to the other main surface, and then returning from the other main surface of the mesh fabric 1 to the one main surface. By doing so, the second heat-fusible yarn 7 can be regularly wound around the warp threads 4a and 4b, and the contact area between the weft threads 5 and the second heat-fusible yarn 7 can be increased, thereby further enhancing the sealing strength of the warp and weft threads.

[0038] The first heat-fusible yarn 6 and the second heat-fusible yarn 7 are yarns that fuse together by heating. While either the first heat-fusible yarn 6 or the second heat-fusible yarn 7 is sufficient, it is preferable to have both. In this case, the amount of secondary binder required in subsequent processes can be further reduced.

[0039] The melting points of the first heat-fusible yarn 6 and the second heat-fusible yarn 7 are preferably 70°C or higher and 160°C or lower, respectively. If the melting points of the first heat-fusible yarn 6 and the second heat-fusible yarn 7 are above the lower limit mentioned above, sealing can be performed at a relatively low temperature. Furthermore, if the melting points of the first heat-fusible yarn 6 and the second heat-fusible yarn 7 are below the upper limit mentioned above, the flexibility of the mesh fabric 1 can be more reliably ensured.

[0040] The first heat-fusible yarn 6 and the second heat-fusible yarn 7 each contain thermoplastic resin fibers. The first heat-fusible yarn 6 and the second heat-fusible yarn 7 may be composed of the same thermoplastic resin fiber, or they may be composed of different thermoplastic resin fibers.

[0041] Thermoplastic resin fibers can be composed of, for example, polyester, polyamide, polyacrylonitrile, polyvinyl alcohol, or polyolefin. Among these, polyester, polyamide, or polyolefin are preferred because they have an even lower melting point. These resins may be used individually or in combination of multiple types.

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

[0043] The second heat-fusible yarn 7 preferably further contains inorganic fibers. The inorganic fibers are not particularly limited, but it is preferable that they do not melt at the heating temperature of the second heat-fusible yarn 7. Such inorganic fibers are not particularly limited, and examples include glass fibers, carbon fibers, and mineral fibers, with glass fibers being preferred. In this case, the sealing strength of the warp threads 4 and weft threads 5 can be further increased. In addition, inorganic fibers have less elongation (0.1% or more, 5% or less) compared to thermoplastic resin fibers and are more likely to entangle with the warp threads 4 and weft threads 5.

[0044] Furthermore, if the second heat-fusible yarn 7 also includes inorganic fibers, the inorganic fibers and thermoplastic resin fibers may be a twisted yarn, or they may simply be inorganic fibers and thermoplastic resin fibers joined together.

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

[0046] The area of ​​the opening 9 in the mesh fabric 1 is, for example, 250 mm². 2 More than 2500mm 2 The weaving should be carried out as follows: The maximum spacing between warp rows 2 should be, for example, 20 mm or more and 60 mm or less. The maximum spacing between weft rows 3 should be, for example, 20 mm or more and 60 mm or less. The thickness of the mesh fabric 1 is not particularly limited, but for example, it should be woven to be 0.2 mm or more and 1 mm or less.

[0047] <Crimping process> Next, the warp threads 4 and weft threads 5 are heat-pressed onto the mesh fabric 1 by heating and pressurizing it.

[0048] Heating and pressing can be performed, for example, by a heated press such as a heated roll press or a heated die press. Furthermore, it is preferable to perform the heated press at a temperature that does not soften the fiber bundles (warp threads 4 and weft threads 5) constituting the mesh fabric 1. The "temperature at which softening does not occur" refers to a temperature lower than the softening point in the case of materials with a softening point, and a temperature below or equal to the softening point in the case of materials without a 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, and more preferably 160°C or lower. The pressure of the heat press is preferably 5 N / cm. 2 More preferably 7 N / cm 2 The above is preferable, with a load of 40 N / cm². 2 More preferably, 15 N / cm 2 The following is possible:

[0050] <Secondary binder application process> Next, a reinforcing mesh is obtained by applying a secondary binder to the crimped mesh fabric 1. Examples of secondary binders include acrylic resin, urethane resin, epoxy resin, vinyl acetate resin, urea resin, and PVC resin. The secondary binder may be used individually or in combination of multiple 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, preferably 35°C or lower, and more preferably 15°C or lower. In this case, coiling can be made even less likely to occur when the material is wound. It is preferable to use multiple types of compounds with different glass transition temperatures as the secondary binder.

[0052] It is preferable to apply the secondary binder in such a way that the ignition loss of the resulting reinforcing mesh is 0.5% to 10.0% by mass. In this case, the flexibility of the resulting reinforcing mesh can be further increased, and curling can be made even less likely. Furthermore, by applying a small amount of secondary binder, damage to the fibers themselves during concrete placement can be prevented, and the desired tensile strength can be obtained more reliably.

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

[0054] In this embodiment, warp thread 4 and weft 5 In contrast, since the first heat-fusible yarn 6 and the second heat-fusible yarn 7 are woven together and then subjected to heating and pressure treatment, the sealing strength of the warp threads 4 and weft threads 5 can be increased, thereby increasing the mechanical strength. Furthermore, since the sealing strength of the warp threads 4 and weft threads 5 can be increased, the amount of secondary binder used in subsequent processes can be reduced. This increases the flexibility of the resulting reinforcing mesh and makes it less prone to curling. Therefore, even when a uniaxially reinforced mesh with large openings 9 and high tensile strength per row is used, workability can be improved. In addition, by applying a secondary binder, damage to the fibers themselves during concrete placement can be prevented, and the desired tensile strength can be obtained.

[0055] In addition , The yarn 4 is woven in such a way that the first heat-fusible yarn 6 and the second heat-fusible yarn 7 are intertwined with it. Often Alternatively, the weft yarn 5 may be intertwined with the first heat-fusible yarn 6 and the second heat-fusible yarn 7 during weaving.

[0056] More specifically, the first heat-fusible yarn 6 can be entangled along at least one of the warp threads 4 and the weft threads 5, and the second heat-fusible yarn 7 can be entangled with at least one of the warp threads 4, the weft threads 5, and the first heat-fusible yarn 6.

[0057] In this invention, one of the heat-fusible yarns, the first heat-fusible yarn 6 and the second heat-fusible yarn 7, may be omitted; at least one heat-fusible yarn is sufficient. Even in this case, the effects of the present invention can still be enjoyed.

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

[0059] In the manufacturing method of the second embodiment, in the mesh fabric formation process, as shown in Figure 3, six warp threads 4a, 4b are arranged in one warp row 2, and one weft thread 5 is arranged in one weft row 3 to weave the mesh fabric 21. Also, as shown in Figure 3, the first heat-fusible yarn 6 is arranged so that it extends parallel to the warp threads 4a, 4b. And the weft 5 and After intertwining, the warp threads 4a, 4b and the weft thread 5 are woven in a plain weave, while the second heat-fusible yarn 7 is woven with the warp threads 4a, 4b Around The yarn is woven by intertwining it in a winding manner. Therefore, in this embodiment, the warp rows 2 are constructed by providing three sets of warp threads 4a and 4b in which the second heat-fusible yarn 7 is intertwined. Other aspects are the same as in the first embodiment.

[0060] In the second embodiment as well, warp thread 4 and weft 5In contrast, the first heat-fusible yarn 6 and the second heat-fusible yarn 7 are woven together, and then subjected to heating and pressure treatment. As a result, the resulting reinforcing mesh is less prone to curling when wound into a roll, has excellent workability, and also possesses superior mechanical strength.

[0061] Therefore, as in the second embodiment, the warp rows 2 may be formed by providing multiple sets of warp threads 4a, 4b intertwined with the second heat-fusible yarn 7. In this way, by weaving the warp threads 4a, 4b and the weft threads 5 and winding the second heat-fusible yarn 7 almost simultaneously, the time required for the mesh fabric formation process can be shortened.

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

[0063] In the manufacturing method of the third embodiment, in the mesh fabric formation process, as shown in Figure 4, one warp thread 4 is used to form one row of warp threads 2, and one weft thread 5 is used to form one row of weft threads 3, thereby weaving the mesh fabric 31. Also, as shown in Figure 4, the first heat-fusible yarn 6 is extended parallel to the warp threads 4. And the weft 5 and The second heat-fusible thread 7 is intertwined with the warp thread 4. Around The weaving process involves intertwining the fibers in a winding manner. Other aspects are the same as in the first embodiment.

[0064] In the third embodiment, the warp threads 4 and weft 5 In contrast, the first heat-fusible yarn 6 and the second heat-fusible yarn 7 are woven together, and then subjected to heating and pressure treatment. As a result, the resulting reinforcing mesh is less prone to curling when wound into a roll, has excellent workability, and also possesses superior mechanical strength.

[0065] Therefore, as in the third embodiment, one warp thread 4 ni The two heat-fusible threads 7 are intertwined The first heat-fusible yarn 6 is positioned so as to extend parallel to the warp threads 4. By doing so, warp rows 2 may be formed.

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

[0067] In the fourth embodiment, in the mesh fabric formation process, a bundle of glass fibers prepared in the same manner as in the first embodiment is used, and a mesh fabric 41 is obtained by weaving using a leno weave, as shown in Figure 5. At this time, as shown in Figures 5 and 6, the warp threads 44 are formed by intertwining the first strand 44a and the second strand 44b, and the weft threads 45 are woven into the warp threads 44 to produce the fabric. Also, as shown in Figure 6, the first heat-fusible yarn 46 is aligned along the first strand 44a. The second strand 44b and weft 45 Entangle them, and pull the second heat-fusible thread 47 along the second strand 44b. The first strand 44a and the weft 45 The yarns are intertwined and woven. Other aspects are the same as in the first embodiment. Note that in Figure 5, the first heat-fusible yarn 46 and the second heat-fusible yarn 47 are not shown.

[0068] In the fourth embodiment, warp thread 44 (First strand 44a and second strand 44b) and weft 45 In contrast, the first heat-fusible yarn 46 and the second heat-fusible yarn 47 are woven together, and then subjected to heating and pressurizing treatment. As a result, the resulting reinforcing mesh is less prone to curling when wound into a roll, has excellent workability, and also possesses superior mechanical strength.

[0069] Therefore, as in the fourth embodiment, the mesh fabric 41 may be obtained by weaving using a leno weave. However, it is preferable to obtain the mesh fabric by weaving using a plain weave, as in the first to third embodiments, because it is possible to further increase the surface area to be bonded by the heat-fusible yarn.

[0070] [Reinforcement mesh winding] Figure 7 is a schematic diagram showing a reinforcing mesh winding body according to one embodiment of the present invention. Figure 8 is a schematic plan view showing the reinforcing mesh constituting the reinforcing mesh winding body according to one embodiment of the present invention.

[0071] The reinforcing mesh winding 10 shown in Figure 7 is constructed by winding the reinforcing mesh 11 shown in Figure 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 includes a secondary binder. The reinforcing mesh 11 can be constructed using the materials described in the section on the method for manufacturing the reinforcing mesh as appropriate. Note that the first heat-fusible yarn 6 and the second heat-fusible yarn 7 are omitted from the description in Figure 8.

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

[0073] Specifically, as shown in Figure 9, when the reinforcing mesh 11 is placed on the flat surface 50, it is preferable that the distance L connecting the two 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, it is possible to further reduce the likelihood of coiling when the mesh is wound into a rolled body, and to further improve workability.

[0074] From the viewpoint of further reducing the likelihood of coiling when the material is formed into a coil and further improving workability, the distance L is more preferably 420 mm or more, and even more preferably 470 mm or more. The distance L may also be up to a maximum of 500 mm.

[0075] The ignition loss 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 ignition loss of the reinforcing mesh 11 is within the above range, it is possible to further reduce the likelihood of coiling when it is rolled into a body, thereby further improving workability. It is also possible to further increase the mechanical strength.

[0076] Furthermore, the maximum spacing W between rows composed of warp rows 2 or weft rows 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, composed of two warp rows or three weft rows, 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 this embodiment, it is possible to provide a reinforcing mesh 11 that is less prone to curling, has excellent workability, and also has excellent mechanical strength.

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

[0080] The present invention will be described in more detail below based on specific examples. The present invention is not limited in any way to the following examples, and can be implemented with appropriate modifications without changing its essence.

[0081] (Example 1) First, raw materials were prepared to produce a glass with the following composition: SiO2 58.6 mass%, ZrO2 17.3 mass%, Li2O 0.1 mass%, Na2O 15.2 mass%, K2O 0.4 mass%, CaO 0.6 mass%, TiO2 7.6 mass%, and Al2O 30.2 mass%. The molten glass was then extracted as glass fiber monofilaments from a bushing having several hundred to several thousand nozzles.

[0082] Next, a sizing agent, consisting of aminosilane, epoxy resin, and lubricant dispersed in water, was applied to the surface of the obtained glass fiber monofilaments using an applicator, adjusted so that the ignition loss was 0.7% by mass. 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 Figure 11 was fabricated. Specifically, as shown in Figure 6, warp threads 44 were formed by intertwining a first strand 44a and a second strand 44b made of glass fiber bundles obtained by the above method, and three sets of these warp threads 44 were provided to form a single row of warp threads 2 as shown in Figure 11. In addition, one weft thread 45 was used to form a single row of weft threads 3 as shown in Figure 11, and this weft thread 3 was woven into the warp threads 2 by leno weaving. Furthermore, as shown in Figure 6, the first heat-fusible yarn 46 was aligned along the first strand 44a. The second strand 44b and weft 45 Entangle them, and pull the second heat-fusible thread 47 along the second strand 44b. The first strand 44a and the weft 45 They were intertwined and woven together.

[0084] The first heat-fusible yarn 46 and the second heat-fusible yarn 47 were heat-fusible yarns (count: 330 dtex) made of nylon fibers as thermoplastic resin fibers.

[0085] The warp threads 44 and weft threads 45 were assigned a count of 1100 tex. The warp density was 5.0 threads / inch, and the weft density was 0.83 threads / inch. The number of heat-fused yarns (warp heat-fused yarns) in warp row 2 was 2 per row, and the number of heat-fused yarns (weft heat-fused yarns) in weft row 3 was 0 per row. The spacing a between warp row 2 and weft row 3 was 30 mm, and the width b of the mesh fabric was 210 mm.

[0086] Next, the obtained mesh fabric was subjected to a temperature of 120°C and a pressure of 10 N / cm². 2 The mesh fabric was then heat-pressed and bonded using a heated roller. Afterward, the resulting mesh fabric was immersed in a secondary binder. The secondary binder used was a mixture of acrylic resin with a glass transition temperature of 14°C and acrylic resin with a glass transition temperature of -10°C. After immersion, the mesh fabric was dried to obtain a reinforcing mesh. The secondary binder was applied so that the ignition loss of the reinforcing mesh was 3.0% by mass. The ignition loss was measured according to the method described in JIS R3420 (2013). The basis weight of the obtained reinforcing mesh was 307 g / m². 2 That was the case.

[0087] (Example 2) In Example 2, a mesh fabric having the structure shown in Figure 11 was fabricated using glass fiber bundles obtained in the same manner as in Example 1. Specifically, as shown in Figure 3, three sets of warp threads 4, each consisting of two warp threads 4a and 4b, were arranged to form one warp row 2, and one weft thread 5 was used as one weft row 3, and the fabric was woven using a plain weave. Also, as shown in Figure 3, the first heat-fusible yarn 6 was extended parallel to each warp thread 4a and 4b. And the weft 5 and The second heat-fusible thread 7 is intertwined with each warp thread 4 Around The fabric was woven by intertwining it in a winding motion.

[0088] As the first heat-fusible yarn 6, a heat-fusible yarn (count: 330 dtex) made of nylon resin as a thermoplastic resin fiber was used. As the second heat-fusible yarn 7, a heat-fusible yarn (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] Here, the number of heat-fusion yarns in the warp yarn rows 2 (warp heat-fusion yarns) was set to 3, and the number of heat-fusion yarns in the weft yarn rows 3 (weft heat-fusion yarns) was set to 0. Further, the secondary binder was applied such that the ignition loss of the reinforcing mesh was 2.0% by mass. Otherwise, a reinforcing mesh was obtained in the same manner as in Example 1. The basis weight of the obtained reinforcing mesh was 298 g / m 2 .

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

[0091] (Example 3) In Example 3, using a 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 Fig. 1 and Fig. 2, weaving was carried out by plain weaving, where warps 4 consisting of two warps 4a and 4b formed one row of warp rows 2, and one weft 5 formed one row of weft rows 3. Further, as shown in Fig. 2, the first heat-fusion yarns 6 were aligned so as to extend parallel along the warps 4a and 4b Weft 5 and and entangled, and the second heat-fusion yarns 7 were entangled with the warps 4 constituting the warp rows 2 Around so as to be wound around the warps, and woven.

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

[0093] Here, the count of the warp yarns 4 was set to 155 tex, and the count of the weft yarns 5 was set to 320 tex. Further, the warp density was set to 10 yarns / inch, and the weft density was set to 5 yarns / inch. The number of heat-fusion yarns (warp heat-fusion yarns) in the warp row 2 was 3 yarns / row, and the number of heat-fusion yarns (weft heat-fusion yarns) in the weft row 3 was 0 yarns / row. The inter-row spacing a between the warp rows 2 and the weft rows 3 was 5 mm, and the width of the mesh fabric was 210 mm. Further, the secondary binder was applied such that the ignition loss of the reinforcing mesh was 5.0% by mass. Otherwise, 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 2That was the case.

[0094] (Example 4) In Example 4, a mesh fabric having the structure shown in Figure 13 was fabricated using a glass fiber bundle obtained in the same manner as in Example 1. Specifically, as shown in Figure 4, one warp thread 4 was used as one warp row 2, and one weft thread 5 was used as one weft row 3, and the fabric was woven using a plain weave. Also, as shown in Figure 4, the first heat-fusible yarn 6 was aligned so as to extend parallel to the warp thread 4. Weft 5 and The second heat-fusible thread 7 is intertwined with the warp thread 4. Around The fabric was woven by intertwining it in a winding motion.

[0095] The first heat-fusible yarn 6 and the second heat-fusible yarn 7 used were the same as those used in Example 2.

[0096] The warp threads 4 and weft threads 5 were counted at 320 tex. The warp and weft densities were set at 5 threads / inch. The number of heat-fusible yarns (warp heat-fusible yarns) in warp row 2 was 2 per row, and the number of heat-fusible yarns (weft heat-fusible yarns) in weft row 3 was 0 per row. The spacing a between warp row 2 and weft row 3 was 5 mm, and the width of the mesh fabric was 210 mm. The secondary binder was applied so that the ignition loss of the reinforcing mesh was 4.0% by mass. The reinforcing mesh was obtained in the same manner as in Example 1. The basis weight of the obtained reinforcing mesh was 130 g / m². 2 That was the case.

[0097] (Example 5) In Example 5, a mesh fabric having the structure shown in Figure 12 was fabricated using a glass fiber bundle obtained in the same manner as in Example 1. Specifically, as shown in Figures 1 and 2, two warp threads 4a and 4b were used to form one warp row 2, and one weft thread 5 was used to form one weft row 3, and the fabric was woven using a plain weave. Also, as shown in Figure 2, the first heat-fusible yarn 6 was aligned so as to extend parallel to the warp threads 4a and 4b. Weft 5 and The second heat-fusible yarn 7 is intertwined with the warp threads 4 that make up the warp row 2. Around The fabric was woven by intertwining it in a winding motion.

[0098] The first heat-fusible yarn 6 and the second heat-fusible yarn 7 used were the same as those used in Example 2.

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

[0100] (Comparative Example 1) In Comparative Example 1, a mesh fabric 71 shown in Figure 14 was prepared using a glass fiber bundle obtained in the same manner as in Example 1. Specifically, one warp thread 74 was used as one row of warp threads, and one weft thread 75 was used as one row of weft threads, and the fabric was woven using a plain weave. Also, as shown in Figure 14, cotton yarn 76 was used as warp thread 74 Around The fabric was woven by intertwining it in a winding motion.

[0101] The warp density was 2.25 threads / inch, and the weft density was 1.88 threads / inch. The spacing between warp and weft rows was 11 mm × 13 mm, and the width of the mesh fabric was 210 mm. The secondary binder was applied so that the ignition loss of the reinforcing mesh was 21.0% by mass. In Comparative Example 1, no heating or pressurizing treatment was performed. The reinforcing mesh was obtained in the same manner as in Example 1. The basis weight of the obtained reinforcing mesh was 220 g / m². 2 That was the case.

[0102] (Comparative Example 2) In Comparative Example 2, a mesh fabric 81 shown in Figure 15 was prepared using glass fiber bundles obtained in the same manner as in Example 1. Specifically, three warp threads 84 were used to form one warp row, and one weft thread 85 was used to form one weft row, and the fabric was woven using a plain weave. Also, as shown in Figure 15, cotton yarn 86 was used in each warp thread 84 Around The fabric was woven by intertwining it in a winding motion.

[0103] The warp density was 5.0 threads / inch, and the weft density was 0.83 threads / inch. The spacing between warp and weft rows was 30 mm, and the width of the mesh fabric was 210 mm. The secondary binder was applied so that the ignition loss of the reinforcing mesh was 20.0% by mass. In Comparative Example 2, no heating or pressurizing treatment was performed. The reinforcing mesh was obtained in the same manner as in Example 1. The basis weight of the obtained reinforcing mesh was 332 g / m². 2 That was the case.

[0104] (Comparative Example 3) In Comparative Example 3, a mesh fabric 91 shown in Figure 16 was prepared using glass fiber bundles obtained in the same manner as in Example 1. Specifically, warp threads 94 were formed by intertwining a first strand 94a and a second strand 94b made from the glass fiber bundles obtained as described above, and the weft threads 95 made from the glass fiber bundles obtained as described above were woven into the warp threads 94 by leno weaving. Heat-fusible yarn and cotton yarn were not used.

[0105] The warp yarn count for Example 94 was 155 tex, and the weft yarn count for Example 95 was 320 tex. The warp density was 10 threads / inch, and the weft density was 5 threads / inch. The spacing between warp and weft rows was 5 mm, and the width of the mesh fabric was 210 mm. The secondary binder was applied so that the ignition loss of the reinforcing mesh was 20.0% by mass. In Comparative Example 3, no heating or pressurizing treatment was performed. The reinforcing mesh was obtained in the same manner as in Example 1. The basis weight of the obtained reinforcing mesh was 153 g / m². 2 That was the case.

[0106] (Comparative Example 4) In Comparative Example 4, a reinforcing mesh was obtained in the same manner as in Comparative Example 3, except that a secondary binder was applied so that the ignition loss of the reinforcing mesh was 8.7% by mass. The basis weight of the obtained reinforcing mesh was 137 g / m². 2 That was the case.

[0107] [evaluation] (Evaluation of tensile strength) For the reinforcing meshes obtained in Examples 1-5 and Comparative Examples 1-4, the tensile strength of one row (one row of warp threads and one row of weft threads) was measured. The tensile strength was measured in accordance with JIS L1015 (2010).

[0108] (Evaluation of curling tendency) The reinforcing mesh obtained in Examples 1-5 and Comparative Examples 1-4 was wound to a diameter of 150 mm to obtain a mesh winding. The obtained reinforcing mesh winding was stored at 40°C for one month. From the outer layer of the stored reinforcing mesh winding, a section 200 mm wide and 500 mm long was cut out. The cut-out sample was designated as reinforcing mesh 11 as shown in Figure 9 and placed on a flat surface 50. After placement, the distance L connecting the two ends of the main surface 11a on the flat surface 50 side of the reinforcing mesh 11 in the winding direction X was measured.

[0109] (Evaluation of sealing strength) From the reinforcing mesh obtained in Examples 1-5 and Comparative Examples 1-4, a section was cut out including the intersection points 8 of the warp rows 2 and weft rows 3, as shown in Figure 10. The warp rows 2 and weft rows 3 were then fixed to a backing board 60 with adhesive 61, and the adhesive strength at the intersection points 8 was measured.

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

[0111] [Table 1]

[0112] As is clear from Table 1, the reinforcing meshes of Examples 1 to 5 were found to be less prone to curling and to have superior workability compared to Comparative Examples 1 to 4. Furthermore, the reinforcing meshes of Examples 1 to 5 were found to have greater sealing strength. In addition, when comparing Examples 1 and 2, which had approximately the same warp yarn count and density, weft yarn count and density, and basis weight, with Comparative Example 2, Examples 1 and 2 had greater tensile strength than Comparative Example 2. Furthermore, when comparing Example 3, which had approximately the same warp yarn count and density, weft yarn count and density, and basis weight, with Comparative Example 3, Example 3 had greater tensile strength. [Explanation of symbols]

[0113] 1, 21, 31, 41… Mesh fabric 2… PL row 3…Weft row 4, 4a, 4b, 44… Warp threads 5.45...weft thread 6,46…First heat-fusible yarn 7.47...Second heat-fusible yarn 8…Intersection 9…Opening 10…Reinforcement mesh winding 11…Reinforcement mesh 11a…main surface 44a...First Strand 44b... The second strand 50…Flat surface 60... backing card 61…Adhesive

Claims

1. A reinforcing mesh winding body is formed by winding a biaxial reinforcing mesh composed of warp and weft threads, The reinforcing mesh has a first heat-fusible yarn and a second heat-fusible yarn, The first heat-fusible yarn is positioned to extend along at least one of the warp and weft threads, and the second heat-fusible yarn is entangled around at least one of the warp, weft, and first heat-fusible yarns. The reinforcing mesh includes a secondary binder, A reinforcing mesh winding body, wherein when the reinforcing mesh is cut out 500 mm in the winding direction from the reinforcing mesh winding body and placed on a flat surface, the shortest distance connecting the two ends of the reinforcing mesh in the winding direction is 400 mm or more.

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

3. The reinforcing mesh winding body according to claim 1 or 2, wherein the maximum spacing between rows composed of the warp or weft threads is 20 mm or more and 60 mm or less.

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

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