JP2007291590A - Mesh woven fabric, method for producing the same and mesh woven fabric-reinforced structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mesh woven fabric hardly causing slippage even in the case of an inexpensive mesh woven fabric with a low resin pick-up and having excellent handleability, sufficiently high tensile strength in the warp direction and excellent appearance quality, to provide a method for producing the same and to provide a mesh woven fabric-reinforced structure. <P>SOLUTION: The mesh woven fabric 10 is a mesh woven fabric in which main fiber bundles 11 composed of a plurality of strands 11a and 11b and weft yarns 12 are plain woven. The mesh woven fabric has auxiliary fiber bundles 13 entangled with the main fiber bundles 11 and is impregnated with a resin. The method for producing the mesh woven fabric 10 comprises a step of entangling the main fiber bundles 11 with the auxiliary fiber bundles 13 and affording a mesh fabric and a step of impregnating the mesh fabric with the resin and thereby coating the surface of the mesh fabric. The mesh woven fabric-reinforced structure is composed by carrying out embedding construction or surface application of the mesh woven fabric 10. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a mesh fabric used for various cement products, outer walls of structures such as buildings, etc., and used for reinforcing mortar and concrete and preventing crack expansion, a manufacturing method thereof, and a reinforced structure using the mesh fabric. Related to things.

  Mortars generally used as products made of various cements and exterior wall structural materials of buildings, etc., when dried and shrink after construction, structural defects such as cracks, cracks and chips are likely to occur on the construction surface Is. If the generated structural defects such as cracks are left for a long period of time, the cracks may expand over time from the surface of the cement product or mortar to the inside and further to the back. The crack portion thus expanded has a problem that water leaks due to intrusion of water, sludge, and the like, and there is also a problem that the strength of the entire structure is weakened due to a decrease in durability against external force. In order to prevent the occurrence of such problems, a mesh mesh fabric made of glass fiber or the like is embedded in mortar used for the outer walls of cement products and buildings to increase the strength of the cement products. A construction method that reinforces and prevents the gradual expansion of cracks has been conventionally performed.

  When manufacturing a mesh fabric such as a glass fiber used together with mortar or concrete in such a situation, first, using a loom, warp yarns are arranged at regular intervals, and weft yarns are driven there at regular intervals, A mesh-like raw fabric is obtained. Next, the mesh-like raw fabric is coated with a resin emulsion as a secondary binder, dried, solidified, and sealed to form a mesh fabric.

In the mesh fabric embedded in cement or the like, the material constituting the fabric, and when it is glass fiber, the binding component having a specific composition constituting the glass fiber is easily eroded by the alkaline substance in the cement. For this reason, in patent document 1, the invention which can be improved by limiting the composition of glass fiber is performed. Further, in Patent Document 2, the problem that a uniform concrete structure cannot be obtained because coarse aggregate such as concrete does not pass through the mesh fabric mesh, the interval between the glass fiber count and the mesh, and further resin An invention that can be improved by prescribing the adhesion rate of the ink has been performed. Further, Patent Document 3 discloses that the tensile strength can be improved by limiting the number of twists in addition to the glass fiber count. Further, Patent Document 4 discloses that the same problem as Patent Document 1 is limited from the viewpoint of improving the deterioration of the appearance quality, and by using two types of glass fibers, the mesh interval and the resin adhesion rate are limited. Has been done.
JP 2000-328391 A JP 2002-88614 A JP 2002-155450 A JP 2002-302877 A

  However, the inventions that have been made so far are not sufficient to obtain a mesh fabric that can cope with various structures such as buildings and exhibit higher performance. Mesh fabrics are used in various structures because they can be used in various structures such as buildings to compensate for the fragility of the structure and dramatically improve toughness and durability. A lot is happening. With the expansion of such applications, there is an increasing demand for further improvement in performance.

  For example, mesh fabrics used in concrete structures such as road substructures and bridge piers and soil concrete, such as those described above, require mesh fabrics with a large mesh interval so that the aggregate of concrete passes through the mesh. . However, mesh woven fabrics with a large mesh interval like this are likely to be misaligned, i.e., a phenomenon in which the points where the fiber bundles constituting the mesh woven fabric intersect with each other tends to shift from a predetermined position. If it occurs, uniform reinforcement becomes difficult. For this reason, if it is attempted to handle it carefully so as not to cause misalignment, there is a problem that handling properties at the time of handling the mesh fabric during the construction process and the like deteriorate. In order to make this misalignment difficult to occur, conventionally, attempts have been made to increase the resin adhesion rate of the mesh fabric. However, the mesh fabric manufactured in this way has a problem of high cost. It has also been attempted to weave a mesh fabric with two warps having the same count by entanglement weaving, but the warp direction's tensile strength decreases and the thickness increases due to warp twisting, and the appearance quality also decreases. There was a problem.

  In recent years, an inexpensive mesh fabric is required, and a mesh fabric with a low resin adhesion rate is often used. In particular, a mesh fabric with a low resin adhesion rate has a lot of poor workability as described above. It has been pointed out.

  In view of such circumstances, the present invention is an inexpensive mesh fabric, and even when the resin adhesion rate is low, misalignment is unlikely to occur, it has excellent workability when handling, that is, handling properties, and sufficient tensile strength in the warp direction. Another object of the present invention is to provide a mesh fabric having a high appearance quality and an excellent appearance quality, a manufacturing method thereof, and a mesh fabric reinforced structure.

  The mesh fabric of the present invention is a mesh fabric in which a main fiber bundle composed of a plurality of strands is woven, has an auxiliary fiber bundle entangled with the main fiber bundle, and is impregnated with a resin. To do.

  Here, it is a mesh fabric in which main fiber bundles composed of a plurality of strands are woven, and has an auxiliary fiber bundle entangled with the main fiber bundles and impregnated with resin. Is a state in which two or more strands, for example, two or more strands are bundled, and one or more strands of auxiliary fiber bundles are entangled with the bundled strands, that is, a main fiber bundle A mesh-shaped woven fabric in which three or more strands are aligned in the same direction in combination with the auxiliary fiber bundle, that is, a mesh-shaped woven fabric configured to have a vacant portion in a mesh shape. The resin is impregnated.

  The main fiber bundle is a fiber bundle that is oriented in the same direction and that represents the same number of fibers and the same material composition, and is the main component of the mesh fabric of the present invention. To illustrate the simplest plain weave, the main fiber bundle is either the warp or the weft, or both the warp and the weft are the main fiber bundle.

  In addition, the auxiliary fiber bundles may be those having a woven fabric structure around the surface of the main fiber bundle or entangled with the strands constituting the main fiber bundle.

  In relation to the main fiber bundle according to the present invention, for the strand constituting the fiber bundle oriented in a direction other than the orientation direction for the strand that becomes the main fiber bundle, that is, the strand constituting the fiber bundle other than the fiber bundle oriented in the main axis direction, Any configuration may be used. That is, when the fiber bundle other than the main axis direction is oriented in a direction of 90 degrees with respect to the main axis, that is, the main axis direction is a warp or end, and the fibers are oriented in the direction of 90 degrees with respect to it. The bundle may be a weft yarn (fill yarn or weft yarn), or the principal axis direction may be a weft yarn, and a fiber bundle oriented in a direction of 90 degrees with respect to it may be a warp yarn. Further, two fiber bundles in which the direction of the fiber bundle other than the main axis direction is 60 degrees or 120 degrees from the main axis, and a structure composed of three axes together with the main axis may be employed. If necessary, a mesh fabric having a multi-axis structure may be used. In other words, two or more axes, four axes, or even more than one axis may be used. Similarly, the shape of the lattice formed by the fiber bundles may be a square, a triangle, or a polygon more than that. In the case of a net with three or more axes, there are intersection points where the overlap of fibers is triple or quadruple. However, it is preferable to use a weaving method that shifts the intersection points because the net does not become too thick.

  However, from the viewpoint of cost and the like, the easiest configuration of the fiber bundle according to the present invention is that the principal axis direction is the warp and the fiber bundle oriented in the direction of 90 degrees is the weft. Then, regarding such a typical configuration of the present invention, details of the fiber bundle are further exemplified below. The simplest configuration example of the main fiber bundle corresponding to the main shaft is a case of two strands. The two strands are basically not twisted, but may be twisted as necessary.

  That is, in a typical configuration, the mesh fabric of the present invention is a net-like fabric woven in a plain weave state using a main fiber bundle in which a plurality of strands are bundled as warps or wefts. This is a mesh fabric composed of auxiliary fiber bundles arranged so as to be entangled so as to form a main fiber bundle in a state where a plurality of strands are further bundled together with the resin component soaked. In this case, the plain weave means a woven structure represented by a woven weave, a weave, a rib weave, or a rib fabric, and a mesh-like void portion exists in the fabric. The mesh woven fabric may be configured so as to be a woven fabric and not a plain plain weave but a plain weave change structure.

  In addition, it is important that the mesh fabric of the present invention has a configuration in which the voids of the mesh are open to the extent that a desired performance can be realized, that is, a configuration having a corresponding void portion, oriented in the same direction and adjacent to each other. It is necessary that the interval between the fiber bundles be at least as large as the thickness of the fiber bundle. Therefore, the distance between the main fiber bundles is larger than the thickness of the main fiber bundle as described above. Here, the interval between the main fiber bundles means the shortest dimension from the surface of a specific main fiber bundle to the adjacent main fiber bundle surface. The auxiliary fiber bundle is entangled with the main fiber bundle, and does not limit the distance between the main fiber bundle and the auxiliary fiber bundle, and also limits the distance between the auxiliary fiber bundle and the adjacent auxiliary fiber bundle. It's not something to do.

  The strands of the main fiber bundle may be any number of two or more as long as the strands are configured to satisfy the desired performance. The material of the strands of the main fiber bundle may be any material as long as it has chemical durability and physical strength that can be used in combination with concrete or mortar. That is, for example, the type of strand is not particularly limited, but glass fiber, aramid fiber, nylon fiber, polyurethane fiber, carbon fiber, vinylon fiber, polyester fiber, polyethylene fiber, polypropylene fiber, acrylic fiber, and the like are suitable.

  Further, the strands of the main fiber bundle may be made of different materials or the same material, and the fiber diameter may be different or the same, and is not limited.

  Further, the mesh fabric of the present invention is not particularly limited with respect to the type of resin impregnated in the fabric, and any mesh fabric can be used as long as it can realize a predetermined function such as sealing. For example, urethane resin, polyester resin, vinyl ester resin, ethylene-vinyl acetate resin, acrylic resin, SBR resin, if a suitable one is selected from the viewpoints of resin viscosity, ease of compatibility with fibers, and ease of use. There are NBR resins and MBR resins. Such resins can be used singly or as a mixture of plural kinds at an appropriate ratio. Further, it is possible to add components other than those described above. Furthermore, it is also possible to add appropriate amounts of various trace additives that modify the performance of the resin. In addition, various methods such as a dipping method and a spray method can be employed for the fiber surface coating method.

  The adhesion rate of the resin according to the present invention to the fiber is not particularly limited, but 3% to 25% is preferable in terms of mass percentage with respect to the mesh fabric in order to realize more stable quality. That is, when the adhesion rate of the resin is less than 3% by mass, the effect of sealing is reduced and the risk of misalignment is increased. Further, if the adhesion rate of the resin exceeds 25% by mass, the cost of the mesh fabric becomes expensive and a resin film is easily formed at the opening of the mesh fabric, that is, at an open portion of the mesh fabric. This is not preferable because the ease of compatibility with is impaired. From such a viewpoint, the adhesion rate of the resin according to the present invention to the fiber is more preferably in the range of 5% to 20% in terms of mass percentage. The resin adhesion rate can be measured and analyzed by a known method.

  The auxiliary fiber bundle entangled with the main fiber bundle composed of a plurality of strands according to the present invention is made of glass fiber, aramid fiber, nylon fiber, polyurethane fiber, carbon fiber, vinylon fiber, polyester fiber, polyethylene fiber, polypropylene as its material. Fiber, acrylic fiber, cotton yarn, hemp, wool, silk, etc. can be applied.

  Further, the number of strands of the auxiliary fiber bundle to be entangled with the main fiber bundle is increased to 2 rather than 1 and 3 rather than 2, even if the adhesion rate of the resin to the woven fabric is lowered, the misalignment is reduced. This is preferable because it is less likely to occur. When two or more strands are employed, the strand materials may be the same or different.

  Furthermore, for the auxiliary fiber bundle according to the present invention, any method of entanglement with the main fiber bundle may be used. For example, the auxiliary fiber bundle is spirally wound around the main fiber bundle as an axis. I can go. When such an entanglement method is employed, for example, the unit fiber length per unit length of the main fiber bundle is preferably as the number of swirling of the auxiliary fiber bundle can be made stronger. In addition, when two or more auxiliary fiber bundles are used as the auxiliary fiber bundle and are entangled in a spiral shape, it is preferable that the swirl direction to be entangled is reversed, so that a stronger structure can be obtained.

  Further, regarding the method of entanglement of the auxiliary fiber bundle according to the present invention with the main fiber bundle, even if it is entangled with all the strands among the main fibers made of a plurality of strands, or one of the plurality of strands. Auxiliary fiber bundles may be entangled only for one strand, but one auxiliary fiber bundle is entangled with each strand of each main fiber bundle, and the same number of auxiliary fiber bundles as the strands of the main fiber bundle are formed. It is preferable to entangle. For example, in the case of a main fiber bundle consisting of two strands, an auxiliary fiber bundle is entangled with each strand, consisting of a total of two auxiliary fiber bundles, and in the case of a main fiber bundle consisting of three strands, Each strand is entangled with an auxiliary fiber bundle and consists of a total of three auxiliary fiber bundles. When one auxiliary fiber bundle is entangled with each strand of each main fiber bundle, and the same number of auxiliary fiber bundles as the main fiber bundle strand is entangled, the width of the main fiber bundle after impregnation with the resin is large, and the mesh This is because the surface area of the woven fabric is increased, the adhesion performance with mortar and concrete is improved, and the reinforcing effect and cracking suppressing effect are improved.

  Further, the auxiliary fiber bundle entangled with the main fiber bundle according to the present invention is not particularly limited with respect to the fiber diameter. When two or more strands are employed as the auxiliary fiber bundle, the fiber diameter of each strand may be the same or may be intentionally changed.

  Further, the auxiliary fiber bundle entangled with the main fiber bundle according to the present invention can be pre-coated or impregnated with a coating agent such as a resin on its surface. If necessary, it may be a mixture of a plurality of types of drugs or a single component. About the application | coating or impregnation method of a coating agent, you may carry out by a suitable method suitably.

  The mesh spacing of the mesh fabric of the present invention is not particularly limited as long as the above-mentioned limitation, that is, the spacing between the main fiber bundles is equal to or greater than the thickness of the main fiber bundle, and the smaller the mesh spacing, the more the cracks in mortar and concrete are prevented. However, if the mesh spacing is made extremely small, the productivity of the mesh fabric will decrease, or the mortar, concrete and mesh fabric will not fit well, and the mesh fabric will tend to peel off. The interval is preferably 5 mm or more. In particular, in the case of concrete containing coarse aggregate, the distance between the eyes is 10 mm or more, preferably 20 mm to 50 mm. That is, when the mesh interval is 10 mm or more, the coarse aggregate easily passes through the mesh fabric and the concrete does not peel off at the mesh fabric interface.

  In addition to the above, the mesh fabric of the present invention preferably has an auxiliary fiber bundle having a tensile strength of 0.03 N / tex or more, because misalignment hardly occurs and excellent handling properties. It is preferable because it is excellent in productivity without breaking.

  Here, the fact that the auxiliary fiber bundle has a tensile strength of 0.03 N / tex or more refers to the measurement procedure specified in JIS R3420 (1999) for the tensile strength of the auxiliary fiber bundle, and a test piece having a length of 350 mm. Is measured at a span of 250 mm and a tensile speed of 300 mm / min, the value indicates a tensile strength of 0.03 N / tex or more.

  Further, in the present invention, the count of the strand used is not particularly limited, but after configuring the mesh fabric, if the count of the fiber is selected such that the measured value of the tensile strength of the mesh fabric is 200 N / 25 mm or more, This is preferable because the effect of preventing cracks and the reinforcing effect are enhanced.

  In addition to the above, if the strand of the main fiber bundle is glass fiber, the mesh fabric of the present invention can have a desired strength because the surface of the fabric is not easily deteriorated by contact with a concrete aggregate or the like.

  Here, in the mesh fabric, the strands of the main fiber bundle are glass fibers, which means that the composition is inorganic silicate glass. For example, alkali-free E glass composition, D glass composition realizing low dielectric constant, C glass composition realizing acid resistance, M glass composition realizing high elastic modulus, S glass realizing high strength and high elastic modulus A glass material such as a composition, a T glass composition having the same function as S glass, and an H glass composition having a high dielectric constant can be adopted, and other materials may be used.

However, in order that the mesh fabric of the present invention can exhibit more excellent performance, it is preferable that the composition of the glass fiber is an alkali-resistant glass fiber. For example, if such a composition is made of an alkali-resistant glass fiber having a ZrO ₂ content of 14% by mass or more in terms of mass percentage, even if this is mixed in cement mortar, It is preferable because a decrease in tensile strength can be prevented and the crack preventing effect of cement mortar and concrete can be maintained over a long period of time.

Examples of the composition of the alkali-resistant glass fiber suitable for the present invention include SiO ₂ 54 to 65%, ZrO ₂ 14 to 25%, Li ₂ O 0 to 5%, Na ₂ O 10 to 17% in terms of mass percentage, K ₂ O 0-8%, RO (provided that R represents Mg, Ca, Sr, Ba, Zn) 0-10%, TiO ₂ 0-7%, Al ₂ O ₃ 0-2%, more preferably, in _{mass%, SiO 2 57~64%, ZrO} 2 18~24%, Li 2 O 0.5~3%, Na 2 O 11~15%, K 2 O 1~5%, RO ( Here, R represents Mg, Ca, Sr, Ba, and _{Zn) 0.2~8%, TiO 2 0.5~5} %, an Al ₂ O ₃ 0~1%.

  However, if necessary, glass materials having a composition other than the alkali-resistant glass fiber can be used.

  Examples of the alkali-resistant glass fiber used in the present invention include yarn, roving, DWR (direct winding roving) and the like.

  In addition to the above, the mesh fabric of the present invention can be manufactured in large quantities and at high speed, so long as the glass fibers of the strands of the main fiber bundle are formed by bushing. Can provide a stable mesh fabric with uniform performance.

  Here, the glass fibers of the strands of the main fiber bundle are formed by bushing, and the glass melt in a molten state heated to a high temperature is drawn out from nozzles made of hundreds to thousands of platinum and rapidly cooled. This indicates that the glass fiber is molded.

  About the bushing used in order to form the strand which concerns on this invention, if the continuous shaping | molding operation can be performed in a high temperature state, the shape will not be limited.

  Further, in addition to the above, the mesh fabric of the present invention reinforces the weaknesses of cement, concrete or mortar as long as it is used when constructing a wall surface or floor surface of an artificial structure together with cement, concrete or mortar, A structure having high durability can be reinforced or newly constructed.

  Here, it is used when constructing a wall surface or floor surface of an artificial structure together with cement, concrete, or mortar. A mesh fabric is combined with cement, concrete, or mortar, a building, a tunnel, a waterway, an underground structure, It means that cement, concrete, or mortar is compounded by sinking on the ceiling or side walls of artificial structures such as river breakwaters, wall surfaces such as columns and beams, or floor surfaces, or both.

  The surface of the artificial structure constituted by the mesh fabric according to the present invention may be further subjected to construction such as overcoating or coating. In that case, cement mortar which is a cement-based material such as coating or spraying is applied. It is also possible to use a method that allows top coating and other methods. In addition, for example, when a cement mortar is overcoated, it is preferable to apply a primer to the surface of the cement-based structure before that because the adhesion between the cement-based structure and the overcoated cement mortar tends to be strong. As the primer, an aqueous resin emulsion such as acrylic emulsion, epoxy emulsion, vinyl acetate emulsion, urethane emulsion, SBR emulsion, and ethylene-vinyl acetate emulsion can be used.

  The method for producing a mesh fabric of the present invention includes a step of forming a mesh fabric by entwining an auxiliary fiber bundle with a main fiber bundle composed of a plurality of strands, and a step of coating the surface of the mesh fabric by impregnating a resin. It is characterized by that.

  Here, having a step of forming a mesh fabric by entanglement of an auxiliary fiber bundle with a main fiber bundle composed of a plurality of strands, and a step of covering the surface of the mesh fabric by impregnating a resin include weaving fibers. When composing a mesh fabric, for example, a plain weave is used first using warp yarns composed of two or more strands and wefts in a direction perpendicular thereto, and the two or more strands have a tensile strength of 0.03 N / tex or more. This indicates that a mesh fabric is formed by entanglement of an auxiliary fiber bundle with the main fiber bundle, and then impregnating the mesh fabric with a desired resin.

  A known loom can be used as appropriate for the step of forming the mesh fabric by entwining the auxiliary fiber bundle with the main fiber bundle composed of a plurality of strands. Further, it is preferable that this step is a step in which the auxiliary fiber bundle is entangled with each strand of each main fiber bundle because the surface area of the mesh fabric increases. For the impregnation of the resin, a known method such as coating using a roller such as an applicator or spray coating can be appropriately used.

  The mesh fabric reinforced structure of the present invention is characterized in that it is constructed by embedding the mesh fabric described above or by surface-treating the mesh fabric.

  Here, the above-mentioned mesh fabric is buried or constructed by surface-treating the mesh fabric, or the mesh fabric is buried on the construction surface such as concrete or mortar or is applied to the surface. This means that the structure will be strengthened.

  The mortar and concrete according to the mesh fabric reinforced structure of the present invention is based on cement, and is generally used as a material for architectural civil engineering. Cement, fine aggregate, coarse aggregate, lightweight aggregate, water, Cement mortar, polymer cement mortar and concrete containing an aqueous polymer dispersion can be used. Furthermore, water reducing agent, AE agent, fluidizing agent, thickener, waterproofing agent, rust preventive agent, curing accelerator, curing retarder, slag, fly ash, silica fume, colorant, quick setting agent, swelling agent as required Further, a shrinkage reducing agent and a reinforcing fiber may be added.

  The mesh woven fabric reinforced structure of the present invention may be used in combination with other reinforcing methods and reinforced structures, whereby a structure having higher strength can be obtained.

(1) As described above, the mesh fabric of the present invention is a mesh fabric in which a main fiber bundle composed of a plurality of strands is woven,
Since it has an auxiliary fiber bundle entangled with the main fiber bundle and is impregnated with a resin, since the warp does not twist like a woven weave, the tensile strength of the warp does not decrease, Also, misalignment is unlikely to occur.

  (1) Further, if the mesh fabric of the present invention is formed by entwining an auxiliary fiber bundle with each strand of each main fiber bundle, it can exhibit high strength characteristics when it is composed of a composite material such as mortar or concrete. It is possible.

  (3) Moreover, if the auxiliary fiber bundle has a tensile strength of 0.03 N / tex or more, the mesh fabric of the present invention has both the tensile strength required for the mesh fabric and the performance of preventing misalignment. In order to obtain an optimum one, it is possible to select by adjusting the fiber count, the mesh interval, the resin adhesion rate, etc. according to the use of the mesh fabric.

  (4) Further, in the mesh fabric of the present invention, if the strand of the main fiber bundle is a glass fiber, the chemical durability can be coped with by finely adjusting the material of the glass fiber.

  (5) Further, in the mesh fabric of the present invention, if the glass fibers of the strands of the main fiber bundle are formed by bushing, the glass fiber forming conditions are appropriately adjusted so as to have high dimensional accuracy in forming. Therefore, it is possible to obtain a mesh fabric having a uniform quality.

  (6) Furthermore, if the mesh fabric of the present invention is used when constructing the wall surface or floor surface of an artificial structure together with cement, concrete or mortar, the construction surface will be chipped or cracked over a long period of time. Difficult structures can be constructed.

  (7) The method for producing a mesh fabric of the present invention includes a step of forming a mesh fabric by entwining an auxiliary fiber bundle with a main fiber bundle composed of a plurality of strands, and a step of coating the surface of the mesh fabric by impregnating a resin. Therefore, the content of the resin can be adjusted as appropriate depending on the structure of the mesh fabric, and the mesh fabric of the present invention can be manufactured optimally according to the use site and purpose of use.

  (8) The method for producing a mesh fabric according to the present invention provides a mesh fabric having a large surface area as long as the mesh fabric is formed by entwining an auxiliary fiber bundle with each strand of each main fiber bundle. Therefore, it becomes possible to produce a mesh fabric having high strength performance with improved adhesion to mortar and the like.

  (9) The mesh fabric reinforced structure of the present invention is constructed by embedding the mesh fabric of the present invention or by surface-treating the mesh fabric, so that it has a stable quality over a long period of time. A structure can be efficiently constructed without much effort during work.

  Below, the mesh fabric of this invention is demonstrated based on an Example.

About the mesh fabric of this invention, it manufactured in the following procedures and evaluated the performance. First, a glass raw material prepared in advance is heated, and a homogenized molten glass is formed into a glass strand by using a platinum bushing. In terms of mass percentage, SiO ₂ 61.0%, ZrO ₂ 19.5%, Li Alkali resistant glass fibers having ₂ O 1.5%, Na ₂ O 12.3%, K ₂ O 2.6%, CaO 0.5%, TiO ₂ 2.6% were prepared.

  A sizing agent containing starch, a lubricant and a softening agent was applied to the surface of the alkali-resistant glass fiber to prepare warp and weft yarns for weaving a mesh fabric so as to have the count shown in Table 1. Further, a bundling agent mainly composed of a polyester resin was applied to the surface of the alkali resistant glass fiber, and mesh warp and weft DWR were prepared so as to have the counts shown in Table 1. Then, each of the strands constitutes the mesh with a predetermined interval between the strands, using the simplest configuration example of the present invention, that is, a main fiber bundle in which two strands are bundled as warp and one fiber as weft As described above, plain weaving was performed using a loom, and a mesh fabric having a structure in which one or two cotton yarns having a tensile strength of 0.1 N / tex was entangled with the warp yarn as an auxiliary fiber bundle was produced. Further, an acrylic resin was applied to the obtained mesh fabric by a dipping method and dried and solidified to prepare a mesh fabric. In addition, about the adhesion rate of resin, the coating amount was adjusted beforehand so that the adhesion rate of the total amount with a sizing agent might be in a predetermined range.

  About the performance of the mesh fabric manufactured by the above process, the following evaluation was implemented. First, regarding mesh mesh misalignment, select workers who are familiar with mesh fabric handling, and after the person gently pulls the mesh fabric left and right in the direction of the mesh fabric surface, Whether or not there was a shift was evaluated by visual inspection, and those in which the misalignment was recognized were evaluated as “bad”, and those in which they were not recognized were evaluated as “good”.

  Regarding the tensile strength of the mesh fabric, referring to the method of JIS L1096, five test pieces each having a width of 25 mm and a length of 200 mm were sampled from each mesh fabric in each of the vertical direction and the horizontal direction. Using the graph, measurement was performed under the measurement conditions of a span of 100 mm and a tensile speed of 50 mm / min, the tensile strength of the mesh fabric was measured, and the average value was calculated as the tensile strength of each sample.

  As for the bending strength of the mesh fabric, the test piece made using the mesh fabric is placed with the mold surface (mesh burying surface) facing downward, the distance between supporting points is 300 mm, and the loading speed is 1 mm / min. It was measured by bending test by loading. The test specimen used for the bending strength was a concrete having a nominal strength of 24 and slump of 8 cm poured into a 100 × 100 × 400 mm formwork to a thickness of 10 mm, and then a main fiber bundle in the longitudinal direction. A mesh fabric cut into a size of 400 × 100 mm was placed, and concrete was poured to a thickness of 100 mm, followed by curing under conditions of 20 ° C. and 60% RH for 28 days.

  Table 1 summarizes the form and count of the mesh fabric corresponding to the examples of the present invention, the distance between the eyes, the resin adhesion rate, and the evaluation results.

  Sample No. For 1, the first strand 11a of the warp 11 of the main fiber bundle is a 155 tex yarn, the second strand 11b is also a 155 tex yarn, and only one cotton yarn 13 with a tensile strength of 0.1 N / tex is entangled as an auxiliary fiber bundle, The fabric of the mesh fabric 10 is produced by plain weaving 310 tex yarn as the weft 12 with an interval of 7 mm, and has a structure as shown in FIG. When the adhesion amount of the acrylic resin applied to this fabric was confirmed by the ignition loss measurement method described in JIS R3420 (1999), the value was 8%. Further, as a result of visual observation, the eye misalignment was a good one that was not recognized at all. And about the tensile strength, when it measured by the above-mentioned evaluation method, the vertical direction is 415N, and the width direction is 422N, and it became clear that it has high performance.

  Sample No. For No. 2, the first strand 11a of the warp 11 is a 310 tex DWR, the second strand 11b is also a 310 tex DWR, and only one cotton yarn 13 having a tensile strength of 0.1 N / tex is entangled as an auxiliary fiber bundle, The fabric of the mesh fabric 10 was produced by plain weaving 620 tex DWR as the weft 12 with an interval of 10 mm. 2 also has the same appearance as FIG. The amount of the acrylic resin applied to the fabric was confirmed by the same ignition loss measurement method as described above, and the value was 8%. As for the eye misalignment, the sample No. As in the case of No. 1, it was a good one in which no misalignment was observed. The tensile strength was also measured by the above-described evaluation method. As a result, the vertical direction was 736N and the horizontal direction was 738N, which also had high performance.

  Furthermore, sample no. 3, the first strand 11a of the warp yarn 11 is a DWR of 1100 tex, the second strand 11b is also a DWR of 1100 tex, and only one cotton yarn 13 having a tensile strength of 0.1 N / tex is entangled as an auxiliary fiber bundle. As the weft 12, a fabric of the mesh fabric 10 is produced by plain weaving of 2200 tex DWR with an interval of 20 mm, and the structure of the fabric 10 is also a structure as shown in FIG. The adhesion amount of the acrylic resin applied thereto was determined as Sample No. When measured in the same manner as in 1, the value was 12%. The misalignment of the sample No. was confirmed by visual observation. Similar to 1, no misalignment was observed, and there was no problem. The tensile strength was also measured in the same manner as described above, and as a result, it was confirmed that the vertical direction was 975 N and the horizontal direction was 987 N, which showed high performance.

  Sample No. For No. 4, the first strand 11a of the warp 11 is a 2200 tex DWR, the second strand 11b is also a 2200 tex DWR, and only one cotton yarn 13 having a tensile strength of 0.1 N / tex is entangled as an auxiliary fiber bundle. The weft 12 was produced by plain weaving 4400 tex DWR with an interval of 25 mm so that the fabric of the mesh fabric 10 had a structure as shown in FIG. The adhesion amount of the acrylic resin applied thereto was determined as Sample No. When measured in the same manner as in 1, the value was 12%. Regarding eye misalignment, sample No. 1 and the tensile strength was also measured in the same manner as described above. As a result, it was confirmed that the vertical direction was 1878N and the horizontal direction was 1862N, and it had high performance.

  In addition, sample No. 5, the first strand 11a of the warp 11 is a DWR of 310 tex, the second strand 11b is also a DWR of 310 tex, and there are two cotton yarns 13 and 13a having a tensile strength of 0.1 N / tex as auxiliary fiber bundles, FIG. As shown in Fig. 4, a mesh fabric 20 was produced by weaving 620 tex DWR as a weft 12 with a mesh spacing of 10 mm. For the amount of acrylic resin applied to the mesh fabric 20, sample no. When measured in the same manner as in 1, the value was 5%. Regarding eye misalignment, sample No. was evaluated by visual observation. No problem was found as in 1. Moreover, the tensile strength was also measured in the same manner as described above, and as a result, it was confirmed that the vertical direction was 727N, the horizontal direction was 730N, and it had high performance.

  Sample No. 6, the first strand 11a of the warp yarn 11 is a DWR of 2200 tex, the second strand 11b is also a DWR of 2200 tex, and there are cotton yarns 13a and 13b having a tensile strength of 0.1 N / tex (the dotted line in FIG. 3) is entangled with each strand of each main fiber bundle as an auxiliary fiber bundle, and the weft 12 is a plain weave of 4400 tex DWR with an interval of 25 mm, and the mesh fabric 30 is formed as shown in FIG. It produced so that it might become a structure like this. The adhesion amount of the acrylic resin applied thereto was determined as Sample No. When measured in the same manner as in 1, the value was 12%. Regarding eye misalignment, sample No. The tensile strength was also measured in the same manner as described above, and as a result, it was confirmed that the warp direction was 1902N and the weft direction was 1894N, and that it had high performance. In addition, since one auxiliary fiber bundle is entangled with each strand of each main fiber bundle, and the same number of auxiliary fiber bundles as the strand is entangled, the width of the main fiber bundle after impregnation with the resin is increased. . Compared to 4, the bending strength was improved by about 30%.

  [Comparative Example] Next, as a comparative example of the present invention, an alkali-resistant glass fiber having the same composition as in the example was prepared in the same procedure as in the example. The evaluation was performed in the same procedure as in the example. The form and count of the mesh fabric of the comparative example, the distance between the eyes, the resin adhesion rate, and the results of evaluation are summarized in Table 2.

  Sample No. which is a comparative example. 6 is one in which only one strand is used as the warp 11 and no two strands are used, and its structure is shown in FIG. 4, but the count is a 620 tex DWR, As shown in FIG. 4, one cotton yarn having a tensile strength of 0.1 N / tex is entangled with the warp yarn 11 as an auxiliary fiber bundle. A fabric of mesh fabric 30 was produced without weaving 620 tex DWR as a weft 12 with a mesh interval of 10 mm. For the amount of acrylic resin applied to the fabric of the mesh fabric 40, the sample No. When measured in the same manner as in 1, the value was 8%. As for the eye misalignment, when it was evaluated by visual observation, it was confirmed that a large number of eye misalignments occurred, and the eye misalignment was in a bad state. Further, the tensile strength was also measured in the same manner as the sample of the example, and as a result, the vertical direction was 732N and the horizontal direction was 726N.

  Sample No. which is a comparative example. 7, the first strand 11a of the warp is a DWR of 310 tex, and the second strand 11b is also a DWR of 310 tex, and unlike the embodiment, the first fiber bundle 11a and the second fiber bundle 11b are not entangled with the cotton yarn. As shown in FIG. 5, weaving and weaving were used, and a mesh fabric 50 was produced using a 620 tex DWR as the weft 12 with a mesh interval of 10 mm. The adhesion amount of the acrylic resin applied thereto was determined as Sample No. When measured in the same manner as in 1, the value was 8%. Regarding eye misalignment, sample No. Although it was not about 6, since the plain weaving was not performed using cotton yarn, misalignment was observed, and there was a practically problematic level. Also, the tensile strength was measured in the same manner as described above. As a result, the vertical direction was 655 N, the horizontal direction was 742 N, and the vertical tensile strength was lower than the tensile strength in the horizontal direction.

  Furthermore, sample No. which is a comparative example. In No. 8, the first strand 11a of the warp was 310 tex DWR, the second strand 11b was also 310 tex DWR, and only one cotton yarn 13 having a tensile strength of 0.1 N / tex was entangled with the warp yarn as an auxiliary fiber bundle. As the weft 12, a mesh fabric 60 as shown in FIG. 6 was prepared by solidifying a 620 tex DWR with a resin without plain weaving at a spacing of 10 mm to form a braided fabric. The adhesion amount of the acrylic resin applied thereto was determined as Sample No. When measured in the same manner as in 1, the value was 8%. Regarding the misalignment, the mesh structure was not a woven structure, and the misalignment was recognized, which was a problematic level. Also, the tensile strength was measured in the same manner as described above. As a result, the vertical direction was 725N, and the transverse direction was 731N.

  Sample No. which is a comparative example. 9, the first fiber bundle 11 of the warp is a DWR of 2200 tex. Unlike the example, the second strand is not used, and one cotton thread having a tensile strength of 0.1 N / tex is used as the auxiliary fiber bundle to the warp 11. Entangled as shown in. A mesh fabric 40 was prepared as the weft 13 without plain weaving of 2200 tex DWR with an interval of 20 mm. The adhesion amount of the acrylic resin applied thereto was determined as Sample No. When measured in the same manner as in 1, the value was 12%. Regarding the eye misalignment, the eye misalignment was recognized by visual observation and was a problematic level. The tensile strength was measured in the same manner as described above. As a result, the vertical direction was 980N, and the transverse direction was 990N.

  Further, although not shown in the table, the sample No. No. 10, no. When a cotton yarn having a tensile strength of 0.01 N / tex was used as the entangled cotton yarn having the same structure as 2, the cotton yarn strength was weak, and the cotton yarn was cut during production and could not be produced.

  Next, a mesh fabric reinforced structure constituted by embedding the mesh fabric of the present invention will be described below.

  Here, the water channel structure 100 constructed in the configuration shown in FIG. 7 will be described. Here, FIG. 7A shows a partial perspective view of the water channel structure 100. FIG. 7B shows an enlarged view of a portion X with respect to FIG. This canal structure 100 is an irrigation canal used as an agricultural canal, etc., and is a facility that combines field irrigation and submerged irrigation. After five years from the time of construction, the concrete on the surface and sides of the aqueduct cracks. The water leakage to the soil S from which it is formed becomes a problem, and the present invention is applied to reinforce including the water leakage location.

  Here, after the clean surface is exposed by shaving the aging part of the concrete portion C that has been previously constructed, the rust prevention treatment is applied to the reinforcing bars T, and the concrete Ma prepared in advance is driven in. The mesh fabric 10 of the present invention is laid down on the entire surface, and then the surface of the mesh fabric 10 is coated with concrete Mb for surface coating. The structure 100. By using this mesh fabric 10, the handling property at the time of construction is improved, the construction time can be shortened easily, and even a person unfamiliar with the work can perform the work easier than before. The resulting structure is robust.

  From the above examples and comparative examples, it was clear that the mesh fabric of the present invention is excellent in handling properties, hardly causes misalignment, and can realize a stable quality. Moreover, it became clear that the reinforced structure using the mesh fabric of the present invention has high strength.

The top view of the mesh fabric of this invention. The top view of the other mesh fabric of this invention. The top view of the other mesh fabric of this invention. Sample No. of Comparative Example 6 and Sample No. FIG. 9 is a plan view of a mesh fabric corresponding to 9; Sample No. of Comparative Example FIG. 7 is a plan view of a mesh fabric corresponding to 7; Sample No. of Comparative Example FIG. 8 is a plan view of a mesh fabric corresponding to 8; It is explanatory drawing of the mesh fabric reinforcement structure using the mesh fabric of this invention, (A) is a perspective view, (B) is an enlarged view about the X section of (A) figure.

Explanation of symbols

10, 20, 30 Mesh fabric 11 Warp 11a First strand 11b Warp second strand 12 Wefts 13, 13a, 13b Tangle (auxiliary fiber bundle)
(When both 13a and 13b are on the back side, dotted lines)
100 mesh reinforced structure (irrigation canal)
C Concrete Ma Embedded concrete Mb Surface coated concrete S Soil T Rebar

Claims (9)

  A mesh fabric in which a main fiber bundle composed of a plurality of strands is woven, and has an auxiliary fiber bundle entangled with the main fiber bundle, and is impregnated with a resin.   2. The mesh fabric according to claim 1, wherein an auxiliary fiber bundle is entangled with each strand of each main fiber bundle.   The mesh fabric according to claim 1 or 2, wherein the auxiliary fiber bundle has a tensile strength of 0.03 N / tex or more.   The mesh fabric according to any one of claims 1 to 3, wherein the strands of the main fiber bundle are glass fibers.   The mesh fabric according to claim 4, wherein the glass fibers of the strands of the main fiber bundle are formed by bushing.   The mesh fabric according to any one of claims 1 to 5, wherein the mesh fabric is used together with cement, concrete or mortar to constitute a wall surface or a floor surface of an artificial structure.   A method for producing a mesh fabric, comprising: a step of forming a mesh fabric by entanglement of an auxiliary fiber bundle with a main fiber bundle composed of a plurality of strands; and a step of covering the surface of the mesh fabric by impregnating a resin. .   The method for producing a mesh fabric according to claim 7, wherein the mesh fabric is formed by entanglement of auxiliary fiber bundles with each strand of each main fiber bundle.   A mesh fabric reinforced structure comprising: embedding the mesh fabric according to any one of claims 1 to 6 or surface-treating the mesh fabric.

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