CN201713642U - Integral laminate porous fabric - Google Patents

Abstract

An integral sandwich porous fabric, comprising an upper layer (10) formed by interweaving a first upper layer warp yarn (1), a second upper layer warp yarn (2) and an upper layer weft yarn (3), and a first lower layer warp yarn (4), the lower layer (11) formed by the interweaving of the second lower layer ground warp yarn (5) and the lower layer weft yarn (6), the upper and lower layers all have at least one layer, the first suede warp (7), the second suede warp ( 8) Interweaving with the sandwich layer weft yarn (9) to form a sandwich layer, and also interweaving with the upper layer weft yarn (3) and the lower layer weft yarn (6). The utility model has strong designability and is suitable for large-scale weaving. Compared with ordinary sandwich fabrics, the weft fiber volume content is significantly increased, which can effectively improve the weft strength and modulus of the fabric; the channel of the core layer is clearer, which is conducive to functional development such as pre-embedding and filling; Non-destructive testing, later repair and maintenance are more convenient. The utility model can be widely used in the fields of rail transportation, reinforced marble materials, double-layer storage tanks and the like.

Description

A whole sandwich porous fabric

technical field

The utility model relates to an integral sandwich porous fabric, which belongs to the technical field of special woven fabric structures. the

technical background

At present, the core materials widely used in the industrial field are mainly rigid foam, honeycomb and balsa wood. However, the traditional sandwich composite material is usually formed by bonding two composite material reinforced panels and a core material with a lower density. The interface bonding strength between the panel and the core material is low, and the interlayer performance is poor. After being impacted, such as falling tools, gravel, hail, impact, etc., the panels and core materials will be delaminated, which will cause a comprehensive decline in mechanical properties and easily lead to structural damage; in addition, in hot and humid environments, water immersion will occur. , causing panel foaming and other phenomena, which makes inspection and maintenance more frequent, thus affecting product quality and cost; in order to increase the interface bonding strength of ordinary core materials, various high-performance adhesives are used, and adhesion grooves are set on the core materials The method of connecting the surface layer and the core layer by means of opening, opening, and stitching increases the difficulty of material design and development, and increases product cost and production efficiency. At the same time, there are still many material performance requirements that are difficult to fundamentally solve. In recent years, in order to solve the shortcomings of sandwich composite materials such as easy delamination and poor mechanical properties, three-dimensional hollow layered fabrics (200610038306.1, etc.) formed by three-dimensional weaving or knitting technology have been developed at home and abroad. Performance fibers (glass fiber, carbon fiber, aramid fiber, etc.) form the upper and lower layers of the fabric and the connecting core layer at one time through a three-dimensional weaving or knitting process. This type of fabric has a good overall structure, excellent comprehensive performance, excellent Designability and rapid development. However, this kind of sandwich fabric is generally formed by connecting fibers (core layer), and the fibers are in a free state in the core layer. How to ensure the flatness of the core material after compounding has extremely high requirements for weaving equipment and technology, resulting in the development of this The price of similar sandwich fabric equipment is very high and the weaving efficiency is not high; because the core layer is formed by fiber connection, the core layer is difficult to meet the demanding performance requirements of high-performance composite materials such as compression resistance, shear resistance, and impact resistance, which affects the performance of such materials. The popularization and application of this kind of sandwich fabric is usually formed by hand lay-up or closed mold process in the composite process, and the connecting fibers need to automatically stand up to the design height under the effect of resin impregnation. When the fabric height exceeds 10mm, it is often difficult to automatically reach the design height. High, need auxiliary process for post-setting treatment, resulting in cumbersome composite process, difficult to form large-scale, continuous large-scale production. the

Utility model content

The technical problems to be solved by the utility model are the disadvantages of ordinary sandwich materials such as easy delamination, poor mechanical properties, and difficult processing; There are limitations and difficulties in continuous composite molding. the

Including the upper layer formed by interweaving the warp yarns of the first upper layer, the warp yarns of the second upper layer and the weft yarns of the upper layer, the lower layer formed by the warp yarns of the first lower layer, the warp yarns of the second lower layer and the weft yarns of the lower layer, the upper and lower layers All have at least one layer, the first suede warp, the second suede warp and the weft yarn of the sandwich layer interweave to form a sandwich layer, which is characterized in that the first suede warp and the second suede warp are not only interwoven with the weft yarn of the sandwich layer, but also The weft yarns of the upper layer and the weft yarns of the lower layer are interwoven to form a continuous integral sandwich porous structure fabric. the

The weaving thickness range of each upper layer or lower layer of the fabric of the utility model is between 0.1-3mm, and the increase of the fabric thickness can be realized by increasing the number of upper and lower layer layers, so as to achieve overall thickening and reduce laying. The purpose of the number of layers. the

The sandwich layer between the upper and lower layers of the utility model is interwoven with two velvet warps and a sandwich layer weft yarn to form a two-dimensional fabric as the skeleton of the sandwich layer. The height range between the upper and lower layers is 1-50mm. the

The height range between the upper and lower layers is: 1-50mm. the

The shape of the fabric sandwich layer of the utility model can be designed into a corrugated shape (W shape), an X shape, etc. according to the use requirements of the composite material. the

The utility model can use a single high-performance continuous fiber for weaving, and can also use a variety of high-performance fibers for mixed weaving, such as: high-strength fibers such as glass, boron, carbon and aramid; even polyester, polyester, etc. Organic fibers such as acrylic, polyacrylonitrile or polyamide. The fiber material can be in the form of roving, single-strand spun yarn or multi-strand spun yarn. the

The utility model adopts a three-dimensional integral weaving method, and the upper layer, the lower layer, and the sandwich layer are integrally connected, effectively avoiding the layering problem; in addition, the fabric sandwich layer of the utility model is formed in the form of fiber interweaving, which can Significantly improve the strength and stiffness of the core layer, accurately determine the height of the fabric sandwich layer and the size and position of the unit core hole; by increasing the number of weft yarns introduced along the weft direction, the overall strength of the weft direction of the fabric can be effectively improved to achieve a Reinforcement effect of unidirectional sandwich composite materials; the fabric of the utility model can form ultra-light structural materials through resin compounding, which can meet most of the load-bearing requirements and have high specific strength and high specific stiffness, as well as heat insulation, energy absorption, and reduction Noise, sound insulation and other functions. The sandwich porous fabric developed by the utility model can be widely used in aviation, aerospace, construction, chemical industry, wind power, transportation, packaging and other fields, and has extremely wide market application prospects. the

The utility model has the advantages of strong designability and suitable for large-scale weaving. the

Description of drawings

Fig. 1 is a typical spatial structure schematic diagram (wavy) of the utility model;

Fig. 2 is a schematic diagram of the spatial structure of the sandwich layer of the present invention in the shape of an "X";

Fig. 3 is the schematic diagram of the time-space structure of the upper layer of the utility model when it is thickened;

Detailed ways

Example 1:

Referring to accompanying drawing 1, present embodiment comprises the upper layer 10 that is formed by the interweaving of first upper layer ground warp yarn 1, second upper layer ground warp yarn 2 and upper layer weft yarn 3, by the first lower layer ground warp yarn 4, the second lower layer ground warp yarn 5 The lower layer 11 formed by interweaving with the weft yarn 6 of the lower layer, the upper layer and the lower layer are both one layer. After the first suede warp 7 and the second suede warp 8 are first interwoven with the lower layer weft yarn 6, they interweave successively with a plurality of sandwich weft yarns 9 distributed in a wave shape to the upper right, and interweave with the sandwich weft yarn 9 positioned at the top of the wave Finally, interweave with the weft yarn 3 of the upper layer, then turn around to the lower right and then interweave with the weft yarn 9 of the sandwich layer in turn, and then interweave with the weft yarn 6 of the lower layer after arriving at the wave valley, and so on. the

Example 2

Referring to FIG. 2 , the upper and lower layers of this embodiment are also the same as those of Embodiment 1. The difference is that the weft yarns of the sandwich layer are divided into two groups, namely the weft yarns of the sandwich layer 9 and the weft yarns of the sandwich layer 9', which are distributed in an "X" shape. Correspondingly, the first suede warp and the second suede warp are also divided into two groups. The first pile warp 7 and the second pile warp 8 of the first group first interweave with the lower layer weft yarn 6, then interweave with the first group of sandwich layer weft yarn 9 to the upper right, and finally interweave with the upper layer weft yarn 3. Second group of the first suede warp 7' and the second suede warp 8' first interweave with the upper layer weft yarn 3, then interweave with the second group of sandwich layer weft yarn 9' successively to the lower right, and finally interweave with the lower layer weft yarn 6. Finally, a two-dimensional plain weave fabric in an "X" shape is formed between the lower layer and the lower layer as the skeleton of the middle sandwich layer of the fabric. the

Example 3

The lower layer and sandwich layer of this embodiment are the same as those of Embodiment 1, the difference is that there are two groups of weft yarns 3 on the upper layer, and the two groups of weft yarns 3 are arranged in parallel from top to bottom. The warp yarn 1 of the first upper layer and the warp yarn 2 of the second upper layer are interwoven with two sets of weft yarns 3 of the upper layer at the same time, thereby forming a thickened upper layer composed of two layers. The thicker the thickness. the

In addition to the solution shown in this embodiment, the thickness of the lower layer can also be increased by increasing the number of groups of weft yarns in the lower layer. the

Claims (5)

1. A whole sandwich porous fabric, comprising an upper layer (10) formed by interweaving warp yarns (1) of the first upper layer, warp yarns (2) of the second upper layer and weft yarns (3) of the upper layer, formed by the first lower layer The lower layer (11) formed by interweaving the ground warp yarn (4), the second lower layer ground warp yarn (5) and the lower layer weft yarn (6) has at least one layer on the upper and lower layers, and the first suede warp (7), the second suede warp The warp (8) interweaves with the weft yarn (9) of the sandwich layer to form a sandwich layer, which is characterized in that the first suede warp (7) and the second suede warp (8) are interwoven with the weft yarn (9) of the sandwich layer, Also interweave with upper layer weft yarn (3) and lower layer weft yarn (6). 2. The integral sandwich porous fabric according to claim 1, characterized in that the height range between the upper and lower layers is 1-50mm. 3. The integral sandwich porous fabric according to claim 1, characterized in that the single-layer thickness of the upper and lower layers ranges from 0.1 to 3 mm. 4. The integral sandwich porous fabric according to claim 1, characterized in that the shape of the sandwich core layer is corrugated or X-shaped. 5. The integral sandwich porous fabric according to claim 1, characterized in that a single high-performance continuous fiber is used for weaving or multiple high-performance continuous fibers are used for weaving.

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