JPH0826496B2 - Multi-layer fabric - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a multilayered fabric, more specifically, a honeycomb structure is formed by connecting a plurality of laminated fabrics to each other, for example, FRP, FRM. The present invention relates to a multi-layer woven fabric that can be used as a fiber material for composite materials.

[Conventional technology]

There is a woven fabric as one of the fiber reinforcements of the composite material. For example, a conventional woven fabric as a fiber material for a fiber reinforced resin (FRP) is generally composed of two woven fabrics by appropriately intermingling and unifying the threads constituting the woven fabric and adhering the two-layer woven fabric. It is bonded with an agent to obtain a laminated body fabric having a desired thickness. Alternatively, as another conventional example, a woven fabric in which two layers of woven fabric are indirectly bonded by using auxiliary fibers, or a multi-layered woven fabric in which three or more woven fabrics are joined by yarns forming the woven fabric and integrated as a woven fabric layer Has also appeared.

However, the above-mentioned laminated woven fabric in which a plurality of woven fabrics are joined by an adhesive is complicated to manufacture, and there is a problem of peeling between laminating and a problem of low shear strength. On the other hand, the latter multi-layer fabric using auxiliary fibers between multiple fabrics, or the fiber material for FRP made into multi-layer fabric by increasing the number of fabrics solves the problems of delamination and shear strength, but the yarn amount proportional to the layer thickness. In addition, there is a limit to the weight reduction, size increase and diversification of the shape of the fiber reinforced material, and it is not yet sufficient to meet the demand for high performance and multifunctional industrial materials.

[Problems to be solved by the invention]

Therefore, the present invention solves the above-mentioned problems of the prior art, is easy to manufacture, has high tensile strength and shear strength, and enables weight reduction and size increase, and high performance as an industrial material,
It is intended to provide a multi-layer woven fabric that meets the demand for high functionality.

[Means for solving problems]

The multi-layered woven fabric of the present invention for solving the above problem is composed of four or more even-numbered woven fabric layers, and includes the following joints (a) and (b) and a non-joint (c) between them. The combination pattern is repeated in the horizontal direction between the fabric layers, and 1 or 2 of the warp yarn and the weft yarn constituting the two fabric structures are formed for every two adjacent fabric layers except the outermost layer of the fabric layer.
A knotting part (a) having knotting points which are continuously crossed as described above, and a knotting part of a warp yarn and a weft yarn constituting both woven fabric structures for every two adjacent woven fabric layers including the outermost layer of the woven fabric layer. (A) a connecting portion (b) having the same number of connecting points as the number of connecting points, -a fixed interval between the connecting portion (a) and the connecting portion (b) or the above. A non-bonded portion (c) that does not allow the fabric layers to cross each other over an interval corresponding to the bonded portion (a), and the center between the bonded portions (b) of the outermost layers of the fabric layer is the center of the fabric layer. It is characterized in that a cross section of the fabric layer is formed into a rhombic or hexagonal space aggregate that is continuous in the vertical and horizontal directions by being stretched outward in the vertical direction and processed with a resin.

[Examples and operations]

Hereinafter, the present invention will be described in more detail with reference to the drawings showing an embodiment of the present invention.

In FIG. 1A, the fabric of the present invention has four fabric layers 1 to 4
It is composed by. Each of the fabric layers 1 to 4 includes the above-mentioned non-bonded portion (c) woven as an independent plain fabric, the outer layer 1 of the fabric layer, and the inner layer 2 and the outer layer 4 adjacent to the outer layer.
And the inner layer 3 adjacent to the outer layer are formed by binding the warp threads forming the respective woven fabric layers to the corresponding weft yarns (b), and the four woven fabric layers 1 to 4 are formed. The non-binding portion (c) woven as an independent plain weave and the above-mentioned binding formed by binding the opposing inner layers 2 and 3 to the corresponding weft yarn with the warp yarns constituting each layer. It is integrated by having the part (a). As described above, the multilayer woven fabric of the present invention forms a unit pattern from the combination of the non-bonded portion (c), the bonded portion (b), the non-bonded portion (c) and the bonded portion (a). Is woven into a desired long product by circulating. The binding portion (a) and the binding portion (b) in FIG. 1A are both to be joined to one weft yarn above and below the two weaving layers to be joined every four weft yarns.
It is formed by interlacing the warp yarns above and below the fabric layer of the layer with the floating and sinking being opposite. FIG. 1B is a drawing that clearly shows the honeycomb structure formed by stretching the multilayer woven fabric of FIG. 1A in the vertical direction and forming the woven fabric between the woven fabric layers. Thus, the honeycomb shape in which the binding portions (a) and (b) are formed by the one-point binding of the warp yarn and the weft yarn is substantially quadrangular.

FIG. 2A shows another embodiment of the multi-layered woven fabric according to the present invention, which is composed of four woven fabric layers made of plain woven fabric as in FIG. 1A.
The above-mentioned connecting portions (a) and (b) in FIG.
Similar to the figure, the warp and the weft forming each fabric layer are formed by crossing, but the binding portions (a) and (b) are formed.
Are formed by continuously binding three weft yarns together with warp yarns. The honeycomb structure obtained by vertically extending the multilayer fabric thus formed is shown in FIG. 2B. In this way, the honeycomb shape formed between the fabric layers by the three-point bonding becomes a hexagon.

Since the length of the distance between the binding portions (a) and (b) can be adjusted by increasing or decreasing the number of binding points between the warp yarns and the weft yarns of the two-layer fabric involved in the formation of the binding portions, The number of connecting points can be appropriately determined depending on the purpose of use of the honeycomb structure and the desired honeycomb shape. For example, a modified hexagonal honeycomb structure may be formed by changing the length of the connecting distance between the connecting portion (a) and the connecting portion (b), or a honeycomb structure composed of a combination of a rectangular shape and a hexagonal shape. Can also be

There is no particular limitation on the length of the distance of the non-coupling portion (c). By increasing the distance of the non-coupling portion (c), it is possible to form a honeycomb structure woven fabric having a larger polygonal cavity, so that it is possible to provide a fibrous material for a composite material that is suitable for the demand for weight reduction and size increase of a single body. On the contrary, if the distance of the non-bonded portion (c) is shortened, it is possible to provide a multilayer woven fabric having a dense and strong honeycomb structure as an industrial material.

The design of the woven fabric constituting each layer of the present invention is not limited to the plain woven fabric, and any woven design such as twill weave and satin weave can be selected.

The multilayer woven fabric of the present invention has a minimum of four layers, and the woven fabrics are integrated to form a honeycomb-shaped cavity row in the laminated cross section. However, the laminated thickness can be increased by increasing the number of laminated fabrics. FIG. 3A is another embodiment of the present invention in which a knotting portion is formed by warp knotting consisting of 6 fabric layers and integrated, and FIG. 3B is a vertical stretching of the 6-layered fabric of FIG. 3A. FIG. Further, FIG. 4A is another embodiment of the present invention in which the binding portion is formed integrally by warp binding consisting of 12 fabric layers, and FIG. 4B shows the 12-layer fabric of FIG. 4A up and down. It is expanded to clearly show the laminated cross section of the honeycomb structure.

In the embodiment shown in FIGS. 3A and 4A, the connecting portion (b) is formed by connecting the outer layer woven fabric 1 and the inner layer woven fabric 2 adjacent to the outer layer woven fabric 1, and the succeeding laminated woven fabric 3 adjacent to the woven fabric layer 4 Thus, all the laminated fabrics are sequentially joined to the adjacent fabrics. The knot (a) is the outer layer fabrics 1 and 6 (Fig. 3A) and the outer layer fabric 1
Except for items 12 and 12 (Fig. 4A), the inner layer fabrics are connected to the opposing fabrics.

The binding portions (a) and (b) can be formed not only by the warp threads constituting the woven fabric to be bound but also by the weft threads. FIG. 5 shows an intersecting state of the weft and the warp when the binding portion is formed by the weft.

The method of combining the above-mentioned connecting portions (a) and (b) with the non-connecting portion (c) is such that the connecting portions (a) and (b) are sequentially repeated with the non-connecting portion (c) interposed. Not only the connection pattern to be returned but also the non-connection part (c) + the connection part (b) + the non-connection part (c) +
The connection pattern may be a combination of the connection part (b), the non-connection part (c) and the connection part (a) in this order, or the combination of the connection parts may be changed as desired. It can be a pattern.

The multi-layered woven fabric of the present invention can be simultaneously woven using, for example, a fly weaving machine with a plurality of dobbies and a bettier weaving machine with a plurality of dobbies having both sides of the shed.

When weaving a multi-layered fabric by weft binding, honeycomb-shaped cavities are formed in the fabric longitudinal direction between the fabric layers, but when weaving a multi-layered fabric by warp binding, the width direction of the fabric is increased between the fabric layers. A honeycomb-shaped cavity is formed.

The material that can be used in the present invention may be a fibrous material,
Examples thereof include natural fibers such as cotton yarn, synthetic fibers such as polyester and polyamide, carbon fibers, glass fibers, and metal wires.

The multilayer woven fabric of the present invention formed by the above constitution is unsaturated polyester resin, resin suitable for applications such as epoxy resin, aluminum, metal such as magnesium, ceramics, various industries combined with inorganic materials such as concrete,
It can be used in a wide range of fields as industrial materials such as agriculture and fisheries, and as medical materials.

〔The invention's effect〕

As described above, the multilayer fabric of the present invention is formed integrally by interlacing the warp (or weft) forming the fabric between the laminated fabrics and the weft (or warp), and therefore, peeling between layers is prevented. Not only is there high tensile strength and shear strength in the layer direction, and since it is a manufacturing-process, production efficiency is good. In addition, since the multilayer woven fabric of the present invention forms honeycomb-shaped cavities between the woven fabrics by binding the woven fabrics to each other, it is possible to manufacture a lightweight and large-sized honeycomb structure. By adjusting the binding interval and the binding pattern, it is possible to realize a dense honeycomb structure which is not easily deformed, and a honeycomb structure having a shape according to the application.

[Brief description of drawings]

FIG. 1A is a weave diagram of a four-layer fabric which is an embodiment of the present invention, and FIG. 1B.
FIG. 1 is a schematic diagram of FIG. 1A, FIG. 2A is a weaving diagram of a four-layer woven fabric showing another embodiment of the present invention, FIG. 2B is a schematic diagram of FIG. 2A, and FIG. 3A is another diagram of the present invention. Fig. 3B is a weaving diagram of a 6-layer woven fabric which is an embodiment, Fig. 3B is a cross-sectional view in the stacking direction of Fig. 3A, and Fig. 4A is a weave diagram of a 12-layer woven fabric which is another embodiment of the present invention, and Fig. 4B. 4A is a cross-sectional view in the laminating direction of FIG. 4A, and FIG. 5 shows a four-layer woven fabric by weft binding which is another embodiment of the present invention. 1, 4, 6, 12 ... Outer layer of fabric (outer layer fabric), 2, 3 ... Inner layer of fabric (inner layer fabric), a, b ... Coupling portion, c ... Non-coupling portion.

Claims (1)

[Claims] 1. The following joints (a) and (b) and non-joint portions (c) between them, which are composed of four or more even-numbered fabric layers.
By repeating the combination pattern in the horizontal direction between the fabric layers, and continuously crossing one or more warp yarns and weft yarns constituting the two fabric structures for every two adjacent fabric layers except the outermost layer of the fabric layer. A binding part (a) having the above-mentioned binding points, and-a binding part (a) of a warp and a weft constituting both woven fabrics for every two adjacent woven layers including the outermost layer of the woven layer.
(B) having the same number of connection points as the number of the connection points of (b), -a fixed interval between the connection parts (a) and (b) or the above connection parts. A non-bonded portion (c) that does not allow the fabric layers to cross each other over a distance corresponding to (a), and the center between the bonded portions (b) of the outermost layers of the fabric layer is located outside the fabric layer in the vertical direction. A multi-layered woven fabric, characterized in that a cross-section of the woven fabric layer is formed into a rhombic or hexagonal space aggregate that is continuous in the vertical and horizontal directions by being stretched and resin-processed.