JP2013011027A - Fabric for reinforcement and weaving method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fabric for one-way reinforcement with good appearance and without the wavy edge of edge portions of the fabric, in which tuft selvage is thermally fused with a selvage part to form a tuft selvage part in a weaving process with a shuttleless loom.SOLUTION: A fabric for reinforcement comprises a plurality of reinforced fibers aligned in parallel in one-way and weft crossing the reinforced fibers. The fabric has a tuft selvage part formed at its edge portion in such a manner as to fit with a selvage part where a thermally fusible yarn is formed as a binding yarn. The fabric for reinforcement is preferably produced by the steps of: arranging a thermally fusible yarn as a binding yarn, other than the binding yarn which forms the selvage part, at an edge portion of the fabric so as to be fused with a tuft selvage therewith; and fitting and fusing the tuft selvage with the selvage part to form the tuft selvage part.

Description

  In the present invention, in addition to the entanglement yarn that organizes the ear portion, a thermal fusion yarn is arranged as an entanglement yarn at the end of the reinforcing fabric so that the tufted ear is aligned with the thermal fusion yarn of the ear portion. The present invention relates to a reinforcing fabric for forming a tufted ear and a method for producing the same.

  As a method for reinforcing civil engineering structures, there is a method to reinforce by reinforcing a reinforcing fabric such as carbon fibers arranged in one direction with a resin such as epoxy and adhering it to the structure to be reinforced. It is often used for reinforcement work. This method is widely adopted because it has a high reinforcing effect, is excellent in durability, and is easy to reinforce.

  In the ear part of the reinforcing fabric woven by a plain loom, etc., in which a plurality of reinforcing fibers are arranged in parallel in one direction, there are tufted ears with a length of about 3 to 10 mm and spread in the fabric width direction. ing. When reinforcing a concrete structure or the like using the reinforcing woven fabric, the woven fabric is subjected to a resin impregnation treatment.

  For example, when the resin is impregnated into the fabric, the tufted ear portion does not come out on the surface by resin impregnation by continuous winding around a member such as a pillar. On the other hand, when it is cut into a certain size and affixed to a member and impregnated with a resin, the tufted ear part warps on the surface of the member as the resin cures, and the tufted ear cured with resin becomes needle-like. It is necessary to process the tufted ear part by cutting the tufted ear part later.

  As a method for weaving a fabric without tufted ears, a tuck-in ear forming method disclosed in Patent Document 1 is known. This method maintains the fabric end warp opening over a number of weaving cycles, including a weaving cycle in which the weft ends are tucked in, and after the tucked-in weaving cycle. Before the fabric end warp is closed at the latest, air is jetted from the outside of the fabric toward the warp opening in the weaving width direction, and the tucked-in weft ends are urged toward the inside of the weaving width direction of the fabric. It is.

  Further, as a method for cutting a tuft of fabric, an apparatus capable of cutting with high accuracy disclosed in Patent Document 2 is provided. The apparatus includes a sensor that detects a side edge of a fabric, a cutter that is provided on the base and cuts the tufts of the fabric, a driving unit that moves the base in the width direction of the fabric, and the sensor. And a control means that is connected to the driving means and controls the operation of the driving means in accordance with the output of the sensor, so that even if the fabric meanders, the base quickly follows in the direction to cancel it. Therefore, the relative positional relationship between the side edge of the fabric and the cutter can always be controlled to be constant.

JP 2003-166168 A JP 06-128875 A

  The tuck-in ear forming method disclosed in Patent Document 1 is a function of making a tuft ear into an ear part like a shuttle loom in weaving with a rapier loom or an air jet loom. By turning and weaving, it becomes an ear part. However, when the folded weft becomes an ear, the weft at the end of the ear becomes dense and affects the physical properties, which is not suitable for a unidirectional reinforcing fabric.

  The device disclosed in Patent Document 2 is a device that cuts the tufts of the fabric, the base disposed in the vicinity of the tufts of the fabric, the sensor for detection, and the tufts provided on the base. Although it is composed of a cutter that cuts, a mechanism that excessively touches the woven fabric before fusing becomes a cause of misalignment of wefts, and is not suitable for a unidirectional reinforcing fabric.

  The present invention has been made in view of the above circumstances, and is a unidirectional reinforcing woven fabric that forms a tufted ear by thermally fusing the tufted ear to the ear by weaving of a continuous loom. An object of the present invention is to provide a unidirectional reinforcing fabric that does not have loose ears and is good in appearance.

  In order to solve the above-mentioned problems, the present invention provides a reinforcing fabric in which a plurality of reinforcing fibers interlaced with wefts are arranged in parallel in one direction, and is formed at an end of the reinforcing fabric, and is a heat-sealing yarn. Is a reinforcing woven fabric characterized in that a tufted ear is formed so as to follow the ears organized as entangled yarns. In addition, in the reinforcing fabric, a process of arranging the heat-fusing yarn as an entangled yarn for fusing the tufted ears separately from the entangled yarns that organize the ears at the end of the reinforcing fabric, the tufted ears It is preferably manufactured by a method comprising a step of forming a tufted ear by heat-sealing along the ear.

  In other words, the tufted ears cut at the front of the weaving during weaving are guided along the ears by a guide, and heat fusion is performed to fuse the tufted ears separately from the entangled yarn that organizes the ears at the fabric end. The unidirectional reinforcing fabric of the present invention can be suitably obtained by arranging the adhering yarn as an entangled yarn and applying heat to the tufted ears at the front of the weave for fusing.

  The basic configuration of the weaving method of the present invention for weaving a unidirectional reinforcing fabric having the above-described configuration is to heat-bond the tufted ears that are bent at a length of 7 to 15 mm at both ends of the fabric. The present invention is characterized in that it has a tufted ear part fused along an ear part formed as an entangled yarn, that is, the tufted ear part is formed in a form along the tufted ear. In this respect, it can be said that the present invention eliminates the conventional ears in the weaving of a plain loom.

  The present invention relates to a weaving method in which tufted ears are formed along the weaving of a plain loom so as not to affect the physical properties and performance of the fabric and the tufted ears are removed from the conventional unidirectional reinforcing fabric. This makes it possible to weave the unidirectional reinforcing fabric with an existing non-woven loom without the need for major modifications.

  Also, because the resin is cured at the time of construction, the conventional ear part warped on the surface of the member, and it was necessary to treat the ear part, but it was treated at the time of construction by thermally fusing the ear part to the ear part. Therefore, the effect of improving workability from the viewpoint of workability and safety and shortening the work period can be obtained.

It is a schematic block diagram of the fabric used for unidirectional reinforcement of this invention, and the guide used for formation of a tuft ear part.

  Hereinafter, typical embodiments of the present invention will be specifically described with reference to the drawings. In addition, this invention is not limited to the embodiment described in drawing.

  FIG. 1 shows a unidirectional reinforcing fabric according to an embodiment of the present invention. In FIG. 1, a guide 1 is shown. In other words, the guide of reference numeral 1 in the figure is for aligning the tufted ear along the ear, reference numeral 2 is a weft, reference numeral 3 is a reinforced fiber made of multifilament yarn that is substantially untwisted (warp group (warp group)). It is. In the unidirectional reinforcing fabric in the present embodiment, a plurality of groups of the reinforcing fibers 3 are arranged in parallel to each other in one direction, and the reinforcing fibers 3 are arranged in a sheet on the same plane, Substantially does not have a bent portion. Therefore, the wefts 2 are interlaced with the plurality of groups of reinforcing fibers 3 while being bent with respect to each other.

  The reinforcing fiber 3 used in the present invention is preferably at least one kind of reinforcing fiber selected from the group consisting of carbon fiber, aramid fiber, glass fiber, and PBO fiber. More preferably, the fiber 3 is used.

  The method for weaving the unidirectional reinforcing fabric of the present invention is not particularly limited as long as it is a weaving by a non-woven loom, but weaving by a rapier loom, an air jet loom, a needle loom or the like is preferably used. Among them, in the present invention characterized in that the tuft ear portion 5 is formed, it is more preferable that the unidirectional reinforcing fabric is woven by a rapier loom or an air jet loom.

  The unidirectional reinforcing fabric shown in FIG. 1 is subjected to heat treatment in order to fuse the guide 1 to the ear portion at the front of the fabric when the fabric is wound from the front of the fabric in an adjacent form. For unidirectional reinforcement in which the fusible yarn 4 is arranged as an entangled yarn, and the tuft ear 2 ′ is fused along the ear portion formed by the heat-fusing yarn 4 by the guide 1 to form the tuft ear portion 5. It is a woven fabric.

Thus, the unidirectional reinforcing fabric of the present invention is composed of a sheet surface in which a plurality of reinforcing fibers 3 made of multifilaments are arranged on the same plane, and is arranged as an entangled yarn at the ears of the reinforcing fibers 3. The heat fusion yarn 4 and the weft yarns 2 alternately arranged in the longitudinal direction on the front and back surfaces of the sheet surface are woven with a predetermined woven structure, and the heat fusion yarn 4 is entangled with the tuft ear 2 '. The bunch ear 5 is obtained by fusing along the arranged ear. And this unidirectional reinforcing fabric is
(A) A step of arranging a thermal fusion yarn as an entanglement yarn in order to fuse the tufted ears separately from the entanglement yarn that organizes the ears at the end of the reinforcing fabric;
(B) A process of heat-sealing the tufted ear along the ear to form the tufted ear,
Is preferably produced by a method comprising:

  The unidirectional reinforcing fabric having such a configuration is located at both ends of the fabric, preferably along the ears where the heat-fusing yarn forms the tufted ears bent at a length of 7 to 15 mm as entangled yarns. Therefore, it can be said that the conventional ears, that is, the ears that become needle-like are eliminated when the impregnated resin is cured.

The tensile strength is 4,900 MPa, the tensile modulus is 230 GPa, the elongation at break is 2.1%, the filament diameter is 7 μm, the number of filaments is 12,000, and the flat carbon fiber having a fineness of 7,200 denier is 3.92 fibers / cm. By arranging glass fibers (filament diameter 7 μm, number of filaments 200, fineness 203 denier) as weft yarns, the plain texture ground structure shown in FIG. In addition, an entangled yarn composed of two low-melting nylon yarns (copolymerized nylon) 300 denier was provided, and weaving was performed by further providing an entangled yarn composed of two low-melting nylon yarns 300 denier on the outer side of the ground structure. This weaving was carried out by a rapier loom that always inserts the weft end by grasping the end of the rapier rod with the tip of the rapier rod from one direction when the warp is opened, and cutting the weft with a cutter at the time of punching.
Next, the raw fabric is melted with the entangled yarn provided on the outer side of the ground structure with the tufted ears guided along the ears at the front of the fabric, and wound around the winding roll, and the ground structure of the ears is heated by a heater. The inner entangled yarn was melted, and the warp and weft adjacent to the entangled yarn were bonded to obtain a reinforcing fabric. In the reinforcing fabric thus obtained, the warp yarns and the tuft ears at both ends of the fabric were bonded with a molten resin so that the warp yarns were not loosened.
Further, an FRP cured plate was manufactured by impregnating the reinforcing fabric with a room temperature curable epoxy resin by hand lay-up. This FRP cured plate did not warp the tufted ear due to curing of the resin, and the tufted ear did not become needle-like.

1 guide 2 weft 2 'tufted ear (part of weft formed on both ends of reinforcing fabric)
3 Reinforcing fiber (warp group (warp))
4 Thermal fusing yarn 5

Claims (6)

A reinforcing woven fabric in which a plurality of reinforcing fibers interlaced by wefts are arranged in parallel in one direction, formed at the end of the reinforcing woven fabric, and at the ear portion where the heat fusion yarn is organized as an entangled yarn A reinforcing fabric characterized in that a tufted ear is formed so as to be along. The reinforcing fabric according to claim 1, wherein a tuft ear is heat-sealed with the heat-sealing yarn to form a tuft ear portion. The reinforcing woven fabric according to claim 1 or 2, comprising a tufted ear part that is heat-sealed along the eard part of the tufted ear bent at a length of 7 to 15 mm. The reinforcing fabric according to any one of claims 1 to 3, wherein the reinforcing fiber is at least one type of reinforcing fiber selected from the group consisting of carbon fiber, aramid fiber, glass fiber, and PBO fiber. The reinforcing fabric according to any one of claims 1 to 4, which is woven by a rapier loom or an air jet loom. A method for producing a reinforcing fabric according to any one of claims 1 to 5, comprising the following steps (A) and (B).
(A) A step of arranging a heat-sealing yarn as an entangled yarn in order to fuse the tufted ears separately from the entangled yarns that organize the ears at the end of the reinforcing fabric (B) The process of forming the ear part by heat fusion along