JP2025027835A - Reinforced fabric and weaving method - Google Patents

Abstract

[Problem] To provide a reinforcing fabric and a weaving method thereof that can improve the workability of the reinforcing fabric by increasing the rigidity of the reinforcing fabric in the warp direction while suppressing misalignment when weaving the main fabric. [Solution] The warp reinforcing yarns 30 and the weft reinforcing yarns 40 are made of bundles of multiple filament yarns, and the bundles of at least one of the reinforcing yarns, the warp reinforcing yarns 30 and the weft reinforcing yarns 40, are tightly twisted and fused in a state where the intersections of the warp reinforcing yarns 30 and the weft reinforcing yarns 40 are temporarily fixed. [Selected Figure] Figure 2

Description

The present invention relates to a sheet-like reinforcing fabric and weaving method used for the purpose of reinforcing the piers and decks of viaducts or the columns and walls of various concrete structures against earthquakes.

In a reinforced fabric in which warp and weft threads are woven in a plain weave, reinforcing fibers are used for the warp threads, and non-reinforcing fibers having a lower fineness than the warp threads are used for the weft threads.
Further, a reinforced woven fabric using reinforcing fibers for the warp and weft is also known (Patent Document 1).
Unidirectional reinforced fabrics that combine reinforcing yarns with warp and weft yarns are also known (Patent Documents 2 and 3).

Japanese Patent Application Publication No. 10-317250 Japanese Patent Application Publication No. 7-243149 JP 2010-18909 A

Conventional reinforcing fabrics have several problems, including the following:
<1> In unidirectional reinforcing fabrics that use reinforcing fibers for the warp and weft, the reinforcing fibers interfere with each other and the gaps between the fibers become small. Therefore, when the unidirectional reinforcing fabric is impregnated with resin to make FRP (fiber-reinforced plastic), the resin does not penetrate into the fabric well, which has a negative effect on the strength of the FRP, as well as on lifting and workability after installation.
<2> If the reinforcing fibers are bent during plain weaving of the reinforcing fabric, the original strength cannot be achieved until tension is applied and the reinforcing fibers move in a straight line, resulting in a decrease in the strength development rate of the reinforcing fabric.
<3> When only reinforcing fibers are used for the warp threads, the rigidity of the entire sheet is reduced, and the sheet sags under its own weight, making it difficult to handle on site and therefore difficult to install.
<4> The main fabric, in which reinforcing yarns are woven into the warp and weft yarns, is transported to a heat treatment means during the manufacturing process.
Since the woven fabric body before the heat treatment is mechanically transported while being tethered to a plurality of rollers, the woven fabric body is prone to become misaligned during transport.
Therefore, the unidirectional reinforcing fabric finally produced through heat treatment will have misalignment.

The present invention was made in consideration of the above points, and aims to provide a reinforcing fabric and weaving method that can solve the problems mentioned above.

The present invention provides a reinforced fabric comprising a plurality of reinforcing fibers, each composed of a plurality of reinforcing fiber multifilament yarns, which are aligned in one direction, a plurality of weft reinforcing yarns arranged at a required interval, and a plurality of warp reinforcing yarns arranged crossing the weft reinforcing yarns at a specified interval, the weft reinforcing yarns arranged alternately along the front and back surfaces of the plurality of reinforcing fibers and the warp reinforcing yarns arranged alternately along the front and back surfaces of the plurality of reinforcing fibers forming a weave structure into which a fabric body is woven, and the fabric body is heat set to fuse the intersections of the warp reinforcing yarns and the weft reinforcing yarns, the warp reinforcing yarns and the weft reinforcing yarns being made of bundle yarns of a plurality of filament yarns, and the intersections of the warp reinforcing yarns and the weft reinforcing yarns, which are crossed in a state where the bundle yarns of at least one of the warp reinforcing yarns or the weft reinforcing yarns are tightly twisted, are fused.
In another form of the present invention, the reinforcing fabric is a unidirectional reinforcing fabric having a plurality of reinforcing fibers arranged parallel to the warp reinforcing yarns, or the reinforcing fabric is a bidirectional reinforcing fabric having a plurality of reinforcing fibers arranged parallel to the warp reinforcing yarns and the weft reinforcing yarns.
In another embodiment of the present invention, at least the bundle yarns of the warp reinforcing yarns are tightly twisted to cross each other and the intersections of the warp reinforcing yarns and the weft reinforcing yarns are fused, or the bundle yarns of the warp reinforcing yarns and the weft reinforcing yarns are tightly twisted to cross each other and fused.
In another embodiment of the present invention, a gap is formed between the warp reinforcing yarns, the bundle yarns being tightly twisted to reduce their diameter.
In another embodiment of the present invention, either one of the warp reinforcing yarns or the weft reinforcing yarns contains a filament yarn having a low melting point, or the melting point of either the warp reinforcing yarns or the weft reinforcing yarns is set lower than that of the reinforcing fibers.
In another embodiment of the present invention, the reinforcing fiber multifilament yarn is one or more of carbon fiber, aramid fiber, glass fiber, polyaramid fiber, boron fiber, alumina fiber, and silicon carbide fiber.
In another embodiment of the present invention, the filament yarn of the warp reinforcing yarn or the weft reinforcing yarn is one or more of spun yarn, filament yarn, or filament-processed yarn of chemical fibers such as polyarylate, aramid, ultra-high molecular weight polyethylene, polyester, nylon, polyethylene, polypropylene, and polyvinyl alcohol.
The present invention is a weaving method for any one of the above-mentioned reinforced fabrics, comprising a weaving process using a textile loom equipped with a heating means to weave a textile main body having a weave structure composed of a plurality of reinforcing fibers, a plurality of weft reinforcing yarns, and a plurality of warp reinforcing yarns, and a heat setting process to heat set the textile during transportation through the heating means, in which at least one of the bundle yarns of the warp reinforcing yarns or the weft reinforcing yarns is pre-twisted tightly, and the intersections of the warp reinforcing yarns and the weft reinforcing yarns are fused in a temporarily fixed state by the untwisting force of the tightly twisted bundle yarns.
In another embodiment of the invention, the textile weaving machine is a rapier weaving machine.

The present invention has at least one of the following advantages.
<1> Either the warp reinforcing yarn or the weft reinforcing yarn was tightly twisted to give it a twist-back force, and the intersections of the warp reinforcing yarn and the weft reinforcing yarn were temporarily fixed using the twist-back force.
Therefore, misalignment is unlikely to occur during the process of transporting the main fabric in the weaving machine, and the reinforcing fabric can be woven without misalignment.
<2> By tightly twisting the bundle yarns of warp reinforcing yarns or weft reinforcing yarns, when the reinforcing fabric is made into FRP, the penetration of resin into the reinforcing fibers is easily facilitated while the penetration of resin into the reinforcing fibers is suppressed.
Therefore, the resin can be impregnated into the reinforcing fabric better, and the strength of the reinforcing fabric when made into FRP is improved.
<3> By tightly twisting at least one of the warp reinforcing yarns or the weft reinforcing yarns, the intersections of the warp reinforcing yarns and the weft reinforcing yarns can be temporarily fixed, thereby preventing misalignment.
This improves the shape stability of the fabric body.
<4> When the bundle yarns of both the warp reinforcing yarns and the weft reinforcing yarns are tightly twisted, the shape stability of the woven fabric itself is further improved.
<5> The warp reinforcing yarns and weft reinforcing yarns fix the reinforcing fibers in place, improving the straightness of the reinforcing fibers and increasing the bending rigidity of the entire reinforcing fabric in the warp direction, thereby improving workability.
<6> When woven into a fabric, the reinforcing fibers are fixed and fused in a state where misalignment is suppressed, improving the straightness and orientation of the reinforcing fibers and improving the strength development rate compared to conventional methods.

FIG. 1 is a perspective view of a reinforcing fabric (unidirectional reinforcing fabric) according to a first embodiment of the present invention; Cross-section of reinforcing fabric An explanatory diagram of an example of a reinforcing fabric Enlarged view of the intersection of warp reinforcing yarns and weft reinforcing yarns with no reinforcing fibers Enlarged view of the boundary between parallel-arranged reinforcing fibers and warp reinforcing yarns FIG. 1 is an explanatory diagram of a structure example of a reinforcing fabric (unidirectional reinforcing fabric) according to Example 2 of the present invention.

[Example 1]
<1> Reinforcing Fabric The following description will be given with reference to FIGS.
In this embodiment, a form in which the reinforcing fabric 10 is a unidirectional reinforcing fiber will be described.
The reinforcing fabric 10 of the present invention comprises a plurality of reinforcing fibers 20 that constitute the warp threads, warp reinforcing threads 30 that also constitute the warp threads and are interposed between adjacent reinforcing fibers 20, and a plurality of weft reinforcing threads 40 that are arranged in the crossing direction of the warp threads and alternately on the front and back surfaces of the reinforcing fibers 20 and the warp reinforcing threads 30, and is woven together with these warp threads (reinforcing fibers 20, warp reinforcing threads 30) and weft threads (weft reinforcing threads 40).
In other words, in the reinforcing fabric of the present invention, reinforcing fibers 20 and warp reinforcing threads 20 are arranged alternately in the same direction, and weft reinforcing threads 40 woven in the intersecting direction of these reinforcing fibers 20 and warp reinforcing threads 20 cross alternately between the reinforcing fibers 20 and the warp reinforcing threads 20 while bending up and down.
In the structure diagram of FIG. 3, the spacing between the reinforcing fibers 20 and the warp reinforcing yarns 30 is shown widened so that the weave structure of the reinforcing fabric 10 can be easily understood.

In this example, the reinforcing fabric 10 is woven in a plain weave, but the weave of the fabric may be in various other weaves, such as a twill weave, in addition to a plain weave.

<2> Reinforcing Fibers The reinforcing fibers 20 are warp yarns that form a group of fiber multifilament yarns into one unit.
The reinforcing fibers 20 are arranged in one direction (the longitudinal direction of the sheet) in parallel with each other and in a straight state without bending on the same plane.

<2.1> Material of the reinforcing fiber The material of the reinforcing fiber multifilament constituting the reinforcing fiber 20 may be either inorganic fiber or organic fiber. For example, in addition to natural polymer or synthetic polymer fibers, any one or more of carbon fiber, aramid fiber, glass fiber, polyaramid fiber, boron fiber, alumina fiber, and silicon carbide fiber may be used in combination.

<2.2> Filaments of Reinforcing Fiber The number of filaments constituting the reinforcing fiber 20 is selected appropriately.
For example, when the reinforcing fiber 20 is an aramid fiber, a bundle of seven filaments of 1610 dtex can be used.

<3> Warp reinforcing yarns The warp reinforcing yarns 30 are warp yarns arranged parallel to the reinforcing fibers 20, and are woven by bending up and down and crossing alternately between the weft reinforcing yarns 40 arranged alternately on the front and back sides of the sheet surface at required intervals in the longitudinal direction of the sheet surface.

<4> Weft reinforcing thread The weft reinforcing thread 40 is a weft thread for intersecting and weaving the reinforcing fibers 20 and the warp reinforcing threads 30, and alternately intersects between the reinforcing fibers 20 and the warp reinforcing threads 30 arranged alternately on the front and back surfaces of the sheet surface at required intervals, perpendicular to the longitudinal direction of the sheet surface, while bending up and down.
In this example, a form in which a single weft reinforcing thread 40 is woven is shown, but a form in which a plurality of weft reinforcing threads 40 are arranged in parallel may also be used.

<5> Details of the Reinforcing Yarn The material, yarn form, etc. of both the reinforcing yarns 30, 40 will be described below.

<5.1> Material of reinforcing yarn The material of the warp reinforcing yarn 30 or the weft reinforcing yarn 40 is made of a bundle of multiple filament yarns.
The filament yarns of the warp reinforcing yarns 30 or the weft reinforcing yarns 40 can be any one or a combination of two or more of spun yarns or filament yarns or processed filament yarns made of chemical fibers such as polyester, polyarylate, aramid, ultra-high molecular weight polyethylene, nylon, polyethylene, polypropylene, and polyvinyl alcohol.
The warp reinforcing yarns 30 and the weft reinforcing yarns 40 may be made of the same material or different materials.
In practice, the reinforcing threads 30, 40 are made of 780 dtex polyester (PET) fibers.

<5.2> Yarn Form of Reinforcing Yarns The yarn forms of the warp reinforcing yarns 30 and the weft reinforcing yarns 40 will be described with reference to FIG.
The warp reinforcing yarns 30 and the weft reinforcing yarns 40 are formed by tightly twisting a bundle of multiple filament yarns in one direction (hard twist) to form uneven twisted surfaces 31, 41 on the outer periphery of the bundle of yarns.

In this example, a form in which the bundle yarns of both warp reinforcing yarns 30 and weft reinforcing yarns 40 are tightly twisted is described, but a form in which only one of the reinforcing yarns, either the warp reinforcing yarns 30 or the weft reinforcing yarns 40, is twisted may also be used. For practical purposes, it is sufficient that at least the bundle yarns of the warp reinforcing yarns 30 are tightly twisted.

In addition, in addition to the multifilament bundle yarn, covering yarn can also be used for the warp reinforcing yarn 30 and the weft reinforcing yarn 40.

<5.3> Reasons for tightly twisting the reinforcing yarns The bundle yarns of filament yarns constituting the warp reinforcing yarns 30 and the weft reinforcing yarns 40 are tightly twisted (twisted) in one direction in order to form uneven twisted surfaces 31, 41 consisting of multiple spiral grooves on the outer surfaces of the warp reinforcing yarns 30 and the weft reinforcing yarns 40, thereby generating a twisting force in both reinforcing yarns 30, 40 and temporarily fixing the intersections of both reinforcing yarns 30, 40 by using the twisting force (Figure 4), and to reduce the diameter (small diameter) of the bundle yarns of the warp reinforcing yarns 30 to separate adjacent warp reinforcing yarns 30 and reinforcing fibers 20 and form gaps G between the warp reinforcing yarns 30 and reinforcing fibers 20, thereby increasing the impregnation of the liquid resin through the gaps G (Figure 5).

<5.4> Means for fusing reinforcing yarns In the present invention, the warp reinforcing yarns 30 and the weft reinforcing yarns 40 are plain woven and then heat set to fuse and fix the intersections of the warp reinforcing yarns 30 and the weft reinforcing yarns 40.
As a fusing means, a heat-fusible filament yarn having a low melting point may be mixed into each of the reinforcing yarns 30, 40, or a filament yarn having a lower melting point than the reinforcing fiber 20 may be used for the filament yarns of both the reinforcing yarns 30, 40.

[Method of manufacturing reinforcing fabric]
Next, a method for producing a reinforcing fabric using a known weaving machine (for example, a rapier weaving machine) will be described.
In this example, an in-line production system will be described in which the reinforcing yarn fusing means is incorporated into a part of the manufacturing line of a weaving machine for textile fabrics.

<1> Weaving Process The method for weaving a plain weave fabric is well known, so a detailed explanation will be omitted.
Reinforcing fibers 20 are wound around a plurality of bobbins and set on the loom.
Similarly, twisted warp reinforcing yarns 30 and weft reinforcing yarns 4 are set on a plurality of bobbins.
The reinforcing fibers 20 taken from each bobbin are fed in parallel on the same plane in a straight line without being bent to the cloth fell through a tension adjusting device.
At this time, warp reinforcing yarns 30 supplied between the reinforcing fibers 20 and weft reinforcing yarns 40 supplied in a direction perpendicular to the warp reinforcing yarns 30 cross each other to weave the main fabric body that forms the basis of the sheet-like fiber-reinforced fabric 10.

The main body of the fabric is composed of a sheet surface in which a plurality of flat reinforcing fibers 20 made of multifilaments are arranged on the same plane, and is woven with a predetermined weaving structure between warp reinforcing threads 30 arranged in a bent manner between at least one of the reinforcing fibers 20 and weft reinforcing threads 40 arranged in a bent manner alternately on the front and back surfaces of the sheet surface.
The plurality of reinforcing fibers 20 arranged in the warp direction in the woven fabric body are maintained in a linear arrangement state without being bent.

When weaving sheet-like fabric, it is possible to produce multiple widths at the same time by not using double-ear needles.

<2> Temporary Fixation of Reinforcing Yarns by Applying a strong twist to either or both of the warp reinforcing yarns 30 and/or the weft reinforcing yarns 40, a twist-back force is generated.
By utilizing this untwisting force, the warp reinforcing yarns 30 and the weft reinforcing yarns 40 are interlocked with each other and temporarily fixed, improving the shape stability of the woven fabric body before heat setting.
If strong twisted yarns are used for both reinforcing yarns 30, 40, the shape stability of the woven fabric body before heat setting is further improved.

<3> Transport of Fabric Body The fabric body woven by the loom travels through a number of rollers towards the heating means.
In conventional woven fabrics, the intersections of the warp and weft yarns tend to shift during transport through a number of rollers toward the heating means, resulting in misalignment of the weave.

In contrast to this, in the present invention, the bundles of filament yarns constituting the warp reinforcing yarns 30 and the weft reinforcing yarns 40 are twisted tightly in advance, forming uneven twisted surfaces 31, 41 on their outer circumferential surfaces.
By twisting the bundle of warp reinforcing yarns 30 and weft reinforcing yarns 40, not only does the frictional resistance of the outer surfaces of both reinforcing yarns 30, 40 increase, but torque is also generated in the warp reinforcing yarns 30 and weft reinforcing yarns 40 due to untwisting forces.

In particular, the untwisting force causes the warp reinforcing yarns 30 and the weft reinforcing yarns 40 to tightly interlock with each other, thereby fixing the intersections of the warp reinforcing yarns 30 and the weft reinforcing yarns 40 and improving the shape stability of the main body of the woven fabric.
Therefore, even if the main fabric body is woven at high speed, misalignment can be effectively prevented.

<4> Heat Setting Step The woven fabric body is heat set while being transported through a heating means.
By subjecting the woven fabric body to heat setting, a reinforcing woven fabric 10 having no misalignment and appropriate rigidity is completed.

<5> Making the reinforcing fabric into FRP The reinforcing fabric 10 is attached in the same manner as in the conventional method.
That is, after the reinforcing fabric 10 is attached to the surface of various concrete structures that have been pretreated for adhesion, the entire reinforcing fabric 10 is impregnated with liquid resin that has been applied to the entire fabric, thereby turning it into FRP (fiber reinforced plastic).

<5.1> Regarding the ease of application of the reinforcing fabric Since both reinforcing threads 30, 40 firmly fix the reinforcing fibers 20, the straightness of the reinforcing fibers 20 is improved, and the bending rigidity in the warp direction of the entire sheet-like fabric is improved.
Therefore, when the reinforcing fabric 10 is attached to the surface of a concrete structure, the reinforcing fabric 10 can be prevented from sagging under its own weight, improving on-site handleability and workability.

<5.2> Resin Impregnation By twisting the bundles of warp reinforcing yarns 30 and weft reinforcing yarns 40, the gaps between the bundles of filament yarns that make up each reinforcing yarn 30, 40 become smaller, and the surface of the reinforcing fabric 10 becomes uneven.
Therefore, when the reinforcing fabric 10 is made into FRP, the impregnation of the resin into the inside of each reinforcing thread 30, 40 is suppressed, while the impregnation of the resin into the reinforcing fiber 20 is promoted, thereby increasing the amount of resin impregnation of the reinforcing fiber 20.

In particular, since the warp reinforcing yarns 30 are pre-reduced in diameter, the resin is more easily impregnated into the reinforcing fabric 10 through the gaps G formed between the warp reinforcing yarns 30 and the reinforcing fibers 20.

Furthermore, the surface area of each reinforcing thread 30, 40 exposed on the surface of the sheet-like reinforcing fabric 10 is increased by the depressions on the surface, which increases the amount of resin adhering to each reinforcing thread 30, 40.

The above factors improve the resin impregnation of the reinforcing fabric 10, resulting in a significant increase in strength after conversion to FRP.

The reinforcing fibers 20 that make up the reinforcing fabric 10 are woven without bending, so that when tension is applied to the reinforcing fabric 10, the reinforcing fibers 20 immediately exhibit strength, improving the strength expression rate of the reinforcing fabric 10.

<5.3> Regarding the basis weight of the reinforcing fibers and the resin impregnation ability When the basis weight of the reinforcing fibers 20 is large, gaps are generated between the reinforcing fibers 20, the surface area is increased, and the resin impregnation ability is improved.
On the other hand, when the weight of the reinforcing fibers 20 is small, the warp reinforcing yarns 30 fill the gaps between the reinforcing fibers 20, thereby reducing the amount of excess resin used.

[Example 2]
Other embodiments will be described below. In the description, the same parts as those in the first embodiment will be given the same reference numerals and detailed description thereof will be omitted.

<1> Bidirectional Reinforcing Fabric In the above-described first embodiment, the reinforcing fabric 10 is a unidirectional reinforcing fiber. However, the reinforcing fabric 10 may be a bidirectional reinforcing fiber.
The reinforcing fabric 10 illustrated in FIG. 6 comprises a plurality of reinforcing fibers 20a constituting the warp threads, a plurality of reinforcing fibers 20b constituting the weft threads, warp reinforcing threads 30 also constituting the warp threads interposed between adjacent reinforcing fibers 20a, and a plurality of weft reinforcing threads 40 arranged in the crossing direction of the warp threads and alternately arranged on the front and back surfaces of the reinforcing fibers 20a constituting the warp threads and the warp reinforcing threads 30, and is woven together with these warp threads (reinforcing fibers 20a, warp reinforcing threads 30) and weft threads (reinforcing fibers 20b, weft reinforcing threads 40).
In other words, in the reinforcing fabric 10 of the present invention, a plurality of reinforcing fibers 20a constituting the warp threads and a plurality of reinforcing fibers 20b constituting the weft threads are arranged so as to cross without bending, and the warp reinforcing threads 30 and the weft reinforcing threads 40 cross alternately while bending up and down between these intersecting reinforcing fibers 20a, 20b.
In the structure diagram of FIG. 6, the spacing between the reinforcing fibers 20, 20b and the reinforcing yarns 30, 40 is shown widened so that the weave structure of the reinforcing fabric 10 can be easily understood.

<2> Effects of this Example In this example, the same effects as those of the first embodiment are achieved.
In other words, by applying a strong twist to either the warp reinforcing yarn 30 or the weft reinforcing yarn 40 or both, a twisting force is generated, and by utilizing this twisting force, the warp reinforcing yarn 30 and the weft reinforcing yarn 40 can be temporarily fixed, thereby improving the shape stability of the woven fabric body before heat setting.

10... Reinforcing fabric 20... Reinforcing fiber 20a... Reinforcing fiber 20b... Reinforcing fiber 30... Warp reinforcing thread 31... Uneven twisted surface 40... Weft reinforcing thread 41... Uneven twisted surface

The present invention relates to a reinforced fabric comprising a plurality of reinforcing fibers, each of which is made of a plurality of reinforcing fiber multifilament yarns, which are aligned in one direction, a plurality of weft reinforcing yarns arranged at a required interval, and a plurality of warp reinforcing yarns arranged crossing the weft reinforcing yarns at a specified interval, wherein the weft reinforcing yarns arranged alternately along the front and back surfaces of the plurality of reinforcing fibers and the warp reinforcing yarns arranged alternately along the front and back surfaces of the plurality of reinforcing fibers form a weave structure into a fabric body, and the fabric body is heat set to fuse intersections of the warp reinforcing yarns and the weft reinforcing yarns, wherein the warp reinforcing yarns and the weft reinforcing yarns are made of bundle yarns of a plurality of filament yarns, and an uneven twisted surface consisting of a plurality of spiral grooves is formed on the outer peripheral surface of the bundle yarns of at least one of the warp reinforcing yarns or the weft reinforcing yarns, and the intersections of the warp reinforcing yarns and the weft reinforcing yarns which are crossed in a tightly twisted state so that a twist-back force is generated in the bundle yarns of the reinforcing yarns are fused.
In another form of the present invention, the reinforcing fabric is a unidirectional reinforcing fabric having a plurality of reinforcing fibers arranged parallel to the warp reinforcing yarns, or the reinforcing fabric is a bidirectional reinforcing fabric having a plurality of reinforcing fibers arranged parallel to the warp reinforcing yarns and the weft reinforcing yarns.
In another embodiment of the present invention, at least the bundle yarns of the warp reinforcing yarns are tightly twisted to cross each other and the intersections of the warp reinforcing yarns and the weft reinforcing yarns are fused, or the bundle yarns of the warp reinforcing yarns and the weft reinforcing yarns are tightly twisted to cross each other and fused.
In another embodiment of the present invention, a gap is formed between the warp reinforcing yarns, the bundle yarns being tightly twisted to reduce their diameter.
In another embodiment of the present invention, either one of the warp reinforcing yarns or the weft reinforcing yarns contains a filament yarn having a low melting point, or the melting point of either the warp reinforcing yarns or the weft reinforcing yarns is set lower than that of the reinforcing fibers.
In another embodiment of the present invention, the reinforcing fiber multifilament yarn is one or more of carbon fiber, aramid fiber, glass fiber, polyaramid fiber, boron fiber, alumina fiber, and silicon carbide fiber.
In another embodiment of the present invention, the filament yarns of the warp reinforcing yarns or weft reinforcing yarns are one or more of filament yarns or filament-processed yarns made of chemical fibers such as polyarylate, aramid, ultra-high molecular weight polyethylene, polyester, nylon, polyethylene, polypropylene, and polyvinyl alcohol.
The present invention is a weaving method for any one of the above-mentioned reinforced fabrics, comprising a weaving process using a textile loom equipped with a heating means to weave a textile main body having a weave structure composed of a plurality of reinforcing fibers, a plurality of weft reinforcing yarns, and a plurality of warp reinforcing yarns, and a heat setting process to heat set the textile during transportation through the heating means, in which at least one of the bundle yarns of the warp reinforcing yarns or the weft reinforcing yarns is pre-twisted tightly, and the intersections of the warp reinforcing yarns and the weft reinforcing yarns are fused in a temporarily fixed state by the untwisting force of the tightly twisted bundle yarns.
In another embodiment of the invention, the textile weaving machine is a rapier weaving machine.

<5.1> Material of reinforcing yarn The material of the warp reinforcing yarn 30 or the weft reinforcing yarn 40 is made of a bundle of multiple filament yarns.
The filament yarns of the warp reinforcing yarns 30 or the weft reinforcing yarns 40 can be any one or a combination of two or more of filament yarns or filament-processed yarns made of chemical fibers such as polyester, polyarylate, aramid, ultra-high molecular weight polyethylene, nylon, polyethylene, polypropylene, and polyvinyl alcohol.
The warp reinforcing yarns 30 and the weft reinforcing yarns 40 may be made of the same material or different materials.
In practice, the reinforcing threads 30, 40 are made of 780 dtex polyester (PET) fibers.

<5.2> Yarn Form of Reinforcing Yarns The yarn forms of the warp reinforcing yarns 30 and the weft reinforcing yarns 40 will be described with reference to FIG .
The warp reinforcing yarns 30 and the weft reinforcing yarns 40 are formed by tightly twisting a bundle of multiple filament yarns in one direction (hard twist) to form uneven twisted surfaces 31, 41 on the outer periphery of the bundle of yarns.

Claims (12)

A reinforced woven fabric comprising a plurality of reinforcing fibers, each of which is made of a plurality of reinforcing fiber multifilament yarns, arranged in one direction, a plurality of weft reinforcing yarns arranged at a required interval, and a plurality of warp reinforcing yarns arranged crossing the weft reinforcing yarns at a specified interval, the weft reinforcing yarns arranged alternately along the front and back surfaces of the plurality of reinforcing fibers and the warp reinforcing yarns arranged alternately along the front and back surfaces of the plurality of reinforcing fibers forming a weave structure into a woven fabric body, and the woven fabric body is heat set to fuse intersections of the warp reinforcing yarns and the weft reinforcing yarns,
The warp reinforcing yarns and the weft reinforcing yarns are made of bundles of filament yarns,
The present invention is characterized in that the warp reinforcing yarns and the weft reinforcing yarns are crossed in a strongly twisted state, and the intersections of the warp reinforcing yarns and the weft reinforcing yarns are fused together.
Reinforcement fabric. The reinforcing fabric according to claim 1, characterized in that the reinforcing fabric is a unidirectional reinforcing fabric in which multiple reinforcing fibers are arranged in parallel with the warp reinforcing yarns. The reinforcing fabric according to claim 1, characterized in that the reinforcing fabric is a bidirectional reinforcing fabric in which multiple reinforcing fibers are arranged in parallel with the warp reinforcing yarns and the weft reinforcing yarns. The reinforced fabric according to claim 1, characterized in that the warp reinforcing yarns and the weft reinforcing yarns are crossed by tightly twisting at least the bundles of warp reinforcing yarns, and the intersections between the warp reinforcing yarns and the weft reinforcing yarns are fused together. The reinforced fabric according to claim 1, characterized in that the warp reinforcing yarns and the weft reinforcing yarns are crossed by tightly twisting the bundles of warp reinforcing yarns and weft reinforcing yarns, and the intersections of the warp reinforcing yarns and the weft reinforcing yarns are fused together. The reinforced fabric according to claim 1, characterized in that a gap is formed between the warp reinforcing yarns, which are made by tightly twisting the bundled yarns to reduce their diameter, and the warp reinforcing yarns. The reinforced fabric according to claim 1, characterized in that either the warp reinforcing yarn or the weft reinforcing yarn contains a low melting point filament yarn. The reinforced fabric according to claim 1, characterized in that the melting point of either the warp reinforcing yarn or the weft reinforcing yarn is lower than that of the reinforcing fiber. The reinforcing fabric according to claim 1, characterized in that the reinforcing fiber multifilament yarn is one or more of the following: carbon fiber, aramid fiber, glass fiber, polyaramid fiber, boron fiber, alumina fiber, and silicon carbide fiber. The reinforcing fabric according to claim 1, characterized in that the filament yarns of the warp reinforcing yarns or weft reinforcing yarns are one or more of the following: spun yarns, filament yarns, or processed filament yarns of chemical fibers such as polyarylate, aramid, ultra-high molecular weight polyethylene, polyester, nylon, polyethylene, polypropylene, and polyvinyl alcohol. A method for weaving a reinforced fabric according to any one of claims 1 to 10, comprising: a weaving step of weaving a fabric body having a weave structure of a plurality of reinforcing fibers, a plurality of weft reinforcing yarns, and a plurality of warp reinforcing yarns using a weaving machine equipped with a heating means; and a heat setting step of heat setting the fabric being transported through the heating means,
At least one of the warp reinforcing yarns or the weft reinforcing yarns is pre-twisted,
The warp reinforcing yarns and the weft reinforcing yarns are fused together in a temporarily fixed state by the untwisting force of the tightly twisted bundle yarns.
A method for weaving reinforcing fabrics. The method for weaving a reinforcing fabric according to claim 11, characterized in that the weaving machine is a rapier weaving machine.

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