CN110904558A

CN110904558A - Hollow-structured tubular fabric

Info

Publication number: CN110904558A
Application number: CN201911337233.XA
Authority: CN
Inventors: 杨中甲; 申宏璇; 郑知; 江雷
Original assignee: Northern (sichuan) International Hong Kong Ltd Co Of Science And Technology Innovation In Western China
Current assignee: Northern (sichuan) International Hong Kong Ltd Co Of Science And Technology Innovation In Western China
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-03-24

Abstract

The invention provides a hollow-structure tubular fabric, and relates to the technical field of multilayer fabrics. The tubular fabric of the hollow structure includes an upper fabric and a lower fabric connected to each other. The upper fabric and the lower fabric are connected to form a cylinder, the upper fabric and the lower fabric respectively comprise an upper panel, a lower panel and binding warp yarns, the binding warp yarns are used for connecting the upper panel and the lower panel, and a hollow structure is formed between the upper panel and the lower panel. The tubular fabric with the hollow structure has the advantages that the upper layer panel and the lower layer panel are effectively connected through the fabric structure design, the integrally formed tubular multilayer fabric is formed, the wall thickness and the tubular size of the fabric can be adjusted according to the material application, cutting and splicing are omitted, raw materials can be saved, the fibers can be ensured to be continuous and complete in the member, and the mechanical property of the material is improved.

Description

Hollow-structured tubular fabric

Technical Field

The invention relates to the technical field of multilayer fabrics, in particular to a tubular fabric with a hollow structure.

Background

Most of hollow fabrics prepared in the market at present are flat-plate type hollow fabrics, the hollow fabrics are required to be coated outside the core materials when cylindrical fabrics are made, and joints are spliced to realize the integrity of the materials. The method has low efficiency and poor stability, and greatly reduces the mechanical property of the hollow composite material.

In view of this, a hollow cylindrical fabric is designed and manufactured, and is integrally formed by continuous fibers, and splicing joints are not needed, which is a technical problem that needs to be improved urgently in the technical field of multilayer fabrics at present.

Disclosure of Invention

The invention aims to provide a tubular fabric with a hollow structure, which comprises an upper layer fabric and a lower layer fabric which are connected with each other, wherein the upper layer fabric and the lower layer fabric are integrally formed by adopting continuous fibers, and are integrally tubular after being connected, so that the steps of cutting and splicing the fabrics are omitted, the application range is wide, and the mechanical property is good.

The technical problem of the invention is solved by adopting the following technical scheme.

The invention provides a tubular fabric with a hollow structure, which comprises an upper layer fabric and a lower layer fabric, wherein the upper layer fabric and the lower layer fabric are connected with each other to form a tubular shape.

The upper fabric includes first binder warps passing through both the first upper panel and the first lower panel to connect the first upper panel and the first lower panel together, the first upper panel and the first lower panel forming a hollow structure therebetween.

The lower fabric includes second binder warps, at least one second upper panel and at least one second lower panel, the second binder warps passing through both the second upper panel and the second lower panel to connect the second upper panel and the second lower panel together, the second upper panel and the second lower panel forming a hollow structure therebetween.

Further, each of the first upper panels includes first upper warp yarns and first upper weft yarns interwoven together. The first lower layer panel includes first lower layer warp yarns and first lower layer weft yarns interwoven together.

Further, each of the second upper panels includes second upper warp yarns and second upper weft yarns interwoven together; the second lower deck includes second lower warp yarns and second lower weft yarns interwoven together.

Furthermore, the first upper layer panel, the second upper layer panel, the first lower layer panel and the second lower layer panel all adopt double-beam let-off. The first upper layer warp yarns, the second upper layer warp yarns, the first lower layer warp yarns and the second lower layer warp yarns all adopt constant tension let-off, and the first binding warp yarns and the second binding warp yarns all adopt fixed length let-off.

The let-off quantities of the first binding warp yarns are respectively greater than the let-off quantities of the first upper layer warp yarns and the first lower layer warp yarns, and the let-off quantities of the second binding warp yarns are respectively greater than the let-off quantities of the second upper layer warp yarns and the second lower layer warp yarns.

Further, the cross section of the first binding warp yarn is X-shaped, V-shaped, 8-shaped or I-shaped, and the cross section of the second binding warp yarn is X-shaped, V-shaped, 8-shaped or I-shaped.

Further, the end of the upper layer of fabric is connected with the end of the lower layer of fabric and is connected by adopting a multilayer angle interlocking structure.

Further, the warp yarns of the upper fabric layer and the warp yarns of the lower fabric layer are interwoven into a multi-layer angle interlocking structure.

Further, a first hollow distance is formed between the first upper layer panel and the first lower layer panel, and the first hollow distance is 3mm to 20 mm.

And a second hollow distance is formed between the second upper panel and the second lower panel, and the second hollow distance is 3mm to 20 mm.

Further, the upper fabric and the lower fabric are respectively made of one or more of glass fiber, carbon fiber, basalt fiber, quartz fiber, silicon carbide fiber, aramid fiber and ultra-high molecular weight polyethylene fiber.

The hollow-structure tubular fabric provided by the invention has the following beneficial effects:

the upper layer fabric and the lower layer fabric are connected with each other and then are integrally cylindrical, the upper layer fabric and the lower layer fabric respectively comprise an upper layer panel, a lower layer panel and binding warp yarns, the binding warp yarns are used for connecting the upper layer panel and the lower layer panel, and a hollow structure is formed between the upper layer panel and the lower layer panel. This hollow structure's shell fabric passes through fabric structural design, makes upper and lower layer panel effective connection, forms integrated into one piece shell fabric multilayer, and can adjust the wall thickness and the cylindric size of fabric according to the material usage, has saved and has tailor and splice, can save raw and other materials, can guarantee again that the fibre is continuous complete in the component, the stress concentration phenomenon that causes when can avoiding fabric and combined material to splice, greatly improves the wholeness of material, has improved the mechanical properties of material. Meanwhile, the method can be used for batch production, greatly improves the production efficiency and lays a foundation for further application of the hollow fabric in composite material application.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic cross-sectional view of a hollow tubular fabric according to an embodiment of the present invention;

fig. 2 is a schematic view of a warp-wise cross-sectional structure of a hollow-structured tubular fabric connected by a multi-layer angle interlocking structure according to an embodiment of the present invention.

Icon: 110-upper fabric; 111-a first upper panel; 113-a first lower panel; 115-a first binding warp yarn; 116-a first upper warp yarn; 117 — first upper weft; 118-first lower layer weft yarns; 119-a first lower layer warp yarn; 130-lower layer fabric; 131-a second upper panel; 133-a second lower panel; 135-a second binding warp yarn; 11. 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22-warp yarns; 23-the weft yarns.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are used only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the equipment or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "mounted" are to be construed broadly, e.g., as being fixedly attached, detachably attached, or integrally attached; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The hollow fabric is compounded by resin to form a three-dimensional integral composite material sandwich structure, and compared with honeycomb materials and foam materials, the hollow composite material has the advantages of difficulty in layering, strong designability, capability of being filled and embedded, good heat preservation, heat insulation and sound insulation effects and the like, and is widely used for preparing double-wall storage tanks at present. However, most of the hollow fabrics prepared in the current market are flat-plate type hollow fabrics, and if cylindrical hollow fabrics are needed, the plate type hollow fabrics are wrapped outside the core materials, and joints are spliced to realize the integrity of the materials. The method has low efficiency and poor stability, and greatly reduces the mechanical property of the hollow composite material. The connection strength of the hollow composite material can be realized to a certain extent through surface layer reinforcement, however, the connection strength of the scheme is poor, and batch production is difficult to realize in seamless fabric cutting.

In order to overcome the defects, the application provides the tubular fabric with the hollow structure, so that the stress concentration phenomenon caused by splicing the fabric and the composite material can be avoided, the integrity of the material is greatly improved, meanwhile, the tubular fabric can be produced in batch, the production efficiency is greatly improved, and a foundation is laid for further application of the hollow fabric in the composite material.

Fig. 1 is a schematic cross-sectional view of a hollow tubular fabric according to an embodiment of the present invention, and fig. 1 is shown.

The tubular fabric of the hollow structure includes an upper fabric 110 and a lower fabric 130, and the upper fabric 110 and the lower fabric 130 are connected to each other to form a tubular shape. The upper and

lower fabrics

110 and 130 include binding warps that pass through both the upper and lower face sheets to connect the upper and lower face sheets together with a hollow structure formed therebetween, at least one upper face sheet, and at least one lower face sheet, respectively.

It should be noted that the upper and lower deck panels may also be connected by binder weft yarns that pass through both the upper and lower deck panels to connect the upper and lower deck panels together.

Specifically, in this embodiment, the upper fabric 110 includes a first binder warp yarn 115, at least one first upper panel 111, and at least one first lower panel 113, the first binder warp yarn 115 passes through both the first upper panel 111 and the first lower panel 113 to connect the first upper panel 111 and the first lower panel 113 together, and a hollow structure is formed between the first upper panel 111 and the first lower panel 113.

The lower fabric 130 includes second binder warps 135, at least one second upper panel 131 and at least one second lower panel 133, the second binder warps 135 passing through both the second upper panel 131 and the second lower panel 133 to connect the second upper panel 131 and the second lower panel 133 together, the second upper panel 131 and the second lower panel 133 forming a hollow structure therebetween.

Each first upper panel 111 includes first upper warp yarns 116 and first upper weft yarns 117, the first upper warp yarns 116 and the first upper weft yarns 117 being interwoven together. The first lower layer panel 113 includes first lower layer warp yarns 119 and first lower layer weft yarns 118, the first lower layer warp yarns 119 and the first lower layer weft yarns 118 being interwoven together.

Each second upper panel 131 includes second upper warp yarns and second upper weft yarns that are interwoven together; second lower panel 133 includes second lower warp yarns and second lower weft yarns that are interwoven together.

The terms "first," "second," and the like, herein are used merely for descriptive purposes and are not intended to have any special meaning. For example, the first upper panel 111 and the second upper panel 131 are identical in structure, and may also be referred to as upper panels, and so on, and thus, they are not illustrated here.

The first upper panel 111, the second upper panel 131, the first lower panel 113 and the second lower panel 133 all adopt double-beam let-off. First upper warp yarn 116, second upper warp yarn, first lower warp yarn 119, and second lower warp yarn all use constant tension let-off, and first tying warp yarn 115 and second tying warp yarn 135 all use fixed length let-off. The let-off of the first binding warp yarn 115 is greater than the let-off of the first upper warp yarn 116 and the first lower warp yarn 119, respectively, and the let-off of the second binding warp yarn 135 is greater than the let-off of the second upper warp yarn and the second lower warp yarn, respectively.

Alternatively, first binder warp yarn 115 may have an X, V, 8, or I shape in cross-section and second binder warp yarn 135 may have an X, V, 8, or I shape in cross-section. The upper fabric 110 and the lower fabric 130 are made of one or more of glass fiber, carbon fiber, basalt fiber, quartz fiber, silicon carbide fiber, aramid fiber, and ultra-high molecular weight polyethylene fiber, and may be made of a single material or a mixture of two or more, i.e., the material used for the upper fabric 110 and the material used for the lower fabric 130 may be the same or different.

In this embodiment, the end of the upper fabric 110 is connected to the end of the lower fabric 130, so that the upper fabric 110 and the lower fabric 130 are integrally formed, that is, the continuous integrity of the fibers is ensured, thereby improving the mechanical properties of the fabrics. The ends, i.e. the areas designated a and b in fig. 1, are also called selvage locations. Specifically, there are various integrally formed connecting methods, for example, the end of the upper layer fabric 110 is connected with the end of the lower layer fabric 130 by using a multi-layer angle interlocking structure.

When connected in a multi-layer corner interlock arrangement, the warp yarns of the upper fabric 110 and the warp yarns of the lower fabric 130 are interwoven to form the multi-layer corner interlock arrangement. This connection is suitable for the case where the thickness of the tubular fabric having a hollow structure is large, that is, when the transition distance between the upper fabric 110 and the lower fabric 130 is large, the multi-layer corner interlocking structure can prevent the float length between the upper fabric 110 and the lower fabric 130 from being excessively long. Of course, the connection mode of the multilayer corner interlocking structure is also suitable for the case that the thickness of the cylindrical fabric with a hollow structure is small.

The distance between the upper and lower face plates, i.e. the hollow distance of the hollow structure, also referred to as the wall thickness of the fabric, is easily adjusted during the weaving process. Therefore, the wall thickness of the hollow cylindrical fabric is easy to adjust, and the hollow cylindrical fabric is convenient to weave fabrics with various wall thickness specifications. Similarly, the transition distance between the upper layer fabric 110 and the lower layer fabric 130 is also convenient to adjust and control, so that the tubular size of the tubular fabric with the hollow structure is also convenient to adjust, and the fabric with any size can be woven. For example, when the tubular fabric with the hollow structure is a cylinder, the diameter and the thickness of the cylinder can be set according to actual needs so as to meet the requirements of different dimensions.

Alternatively, the upper and lower face sheets may be any one of plain weave, twill weave, and variations thereof. The thickness of the upper fabric 110 may be equal to or different from the thickness of the lower fabric 130, and the number of layers of the upper fabric 110 and the lower fabric 130 may be a single layer or two or more layers. In addition, in the upper fabric 110, the number of layers of the upper panel and the lower panel may be equal or unequal; in the lower fabric 130, the number of layers of the upper panel and the lower panel may be equal or may not be equal. In the present embodiment, a first hollow distance, i.e., the thickness of the upper fabric 110, is formed between the first upper layer panel 111 and the first lower layer panel 113, and the first hollow distance is preferably 3mm to 20 mm. The second upper panel 131 and the second lower panel 133 form a second hollow distance therebetween, i.e., the thickness of the lower fabric 130, and the second hollow distance is preferably 3mm to 20 mm. When the tubular fabric having a hollow structure is a cylindrical type, the cylinder diameter is preferably 6mm to 200 mm. Of course, the actual size of the fabric can be flexibly designed, and the cross section of the hollow cylindrical fabric can be circular, or can be any other shape such as direction, triangle, diamond, ellipse, polygon, and the like, and is not limited in this respect.

The weaving principle of the hollow cylindrical fabric provided by the invention is as follows:

to prevent the upper fabric 110 from transitioning directly to the lower fabric 130, the floats may be too great, making the integrity of the fabric less than desirable. In this embodiment, the edge yarn positions (designated by a and b) are in a multi-layer angular interlocking configuration, and the upper fabric 110 is bound to the lower fabric 130 by warp binding to ensure the continuity and integrity of the fibrous material in the fabric.

Specifically, as shown in fig. 2, in the initial part, i.e., the selvage position a, the

warp yarns

11, 12, 13, 14, 15, 16 in the upper layer fabric 110 are lifted upwards, the

warp yarns

17, 18, 19, 20, 21, 22 in the lower layer fabric 130 sink downwards, and the weft yarns 23 are introduced at the interweaving positions of the lifted warp yarns and the sinking warp yarns to form the angle interlocking structure. At the intermediate position c, the upward-lifted

warps

11, 12, 13, 14, 15, 16 constitute the upper layer fabric 110 of the cylindrical fabric, wherein the warps 11, 13 constitute the upper layer panel of the upper layer fabric 110, the

warps

12, 14 constitute the lower layer panel of the upper layer fabric 110, and the

warps

15, 16 serve as binding warps to connect the upper layer panel and the lower layer panel, so that the upper layer fabric 110 has a hollow fabric structure. The

downward warp yarns

17, 18, 19, 20, 21, 22 form the lower fabric 130 of the cylindrical fabric, wherein the

warp yarns

17, 19 form the upper panel of the lower fabric 130, the

warp yarns

18, 20 form the lower panel of the lower fabric 130, and the warp yarns 21, 22 serve as binding warp yarns to connect the upper panel and the lower panel, so that the lower fabric 130 is in a hollow structure. At the end, i.e. the selvage position b, an angle interlock is still formed according to the initial part. Since the upper layer fabric 110 and the lower layer fabric 130 share the same set of warp yarns, they are stretched into a cylindrical fabric.

In summary, the tubular fabric with a hollow structure provided by the invention has the following beneficial effects:

the tubular fabric with a hollow structure provided by the invention comprises an upper layer fabric 110 and a lower layer fabric 130, and the whole tubular fabric is cylindrical after being stretched. The upper fabric 110 and the lower fabric 130 are both hollow at the middle position, and at the edge yarn position, the warp yarns are bound with each other to connect the upper fabric 110 and the lower fabric 130 into a whole. The wall thickness and the whole size of the hollow cylindrical fabric can be adjusted, and preferably, the wall thickness ranges from 3mm to 20mm, and the diameter ranges from 6mm to 200 mm. The upper fabric 110 and the lower fabric 130 can be designed to be single-layer or multi-layer, and can realize different thicknesses, which can meet the use requirements of different components.

Through the fabric structural design, the upper panel and the lower panel are effectively connected to form the integrally formed cylindrical multilayer fabric, the wall thickness and the diameter of the fabric can be adjusted according to the material application, the cutting and splicing steps are omitted, raw materials can be saved, the fibers can be ensured to be continuous and complete in the member, and the mechanical property of the material is improved. The stress concentration phenomenon caused by splicing the fabric and the composite material can be avoided, the integrity of the material is greatly improved, batch production can be realized, the production efficiency is greatly improved, and a foundation is laid for further application of the hollow fabric in the field of composite materials.

In addition, the composite material prepared by the fabric has the structural characteristic of accurate profiling, can meet the high specific strength and high specific stiffness of the bearing requirement on one hand, and can meet the multifunctional requirements of heat insulation, energy absorption, noise reduction, detection and the like of the same structure on the other hand. Moreover, the composite material made of the fabric reinforced material can be directly applied to the manufacture of the tubular fabric with a hollow structure, the fibers in the composite material have continuous integrity, the reduction of mechanical properties caused by splicing the fabric is avoided, and the method is an ideal method for realizing light weight, high strength, multiple functions and integrated weaving and forming.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, as it will be apparent to those skilled in the art that various modifications, combinations and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The tubular fabric with the hollow structure is characterized by comprising an upper layer fabric and a lower layer fabric, wherein the upper layer fabric and the lower layer fabric are connected with each other to form a tubular shape;

the upper fabric includes a first binder warp yarn passing through both the first upper panel and the first lower panel to join the first upper panel and the first lower panel together, the first upper panel and the first lower panel forming a hollow structure therebetween;

2. A tubular fabric of hollow structure according to claim 1, wherein each of said first upper panels comprises first upper warp yarns and first upper weft yarns, said first upper warp yarns and said first upper weft yarns being interwoven together; the first lower layer panel includes first lower layer warp yarns and first lower layer weft yarns interwoven together.

3. A tubular fabric of hollow structure according to claim 2, wherein each of said second upper panels comprises second upper warp yarns and second upper weft yarns, said second upper warp yarns and said second upper weft yarns being interwoven together; the second lower deck includes second lower warp yarns and second lower weft yarns interwoven together.

4. The tubular fabric of claim 3, wherein the first upper panel, the second upper panel, the first lower panel and the second lower panel are let-off using a double beam; the first upper layer warp yarns, the second upper layer warp yarns, the first lower layer warp yarns and the second lower layer warp yarns all adopt constant tension let-off, and the first binding warp yarns and the second binding warp yarns all adopt fixed length let-off;

5. A hollow-structured tubular fabric as claimed in claim 1, wherein said first binding warp yarns are X-, V-, 8-or I-shaped in cross section and said second binding warp yarns are X-, V-, 8-or I-shaped in cross section.

6. The tubular fabric of claim 1, wherein the ends of the upper fabric layer are connected to the ends of the lower fabric layer in a multi-layer corner interlocking structure.

7. The hollow-structured tubular fabric according to claim 6, wherein the warp yarns of the upper fabric layer and the warp yarns of the lower fabric layer are interwoven into a multi-layer angle interlock structure.

8. The tubular fabric of hollow structure according to claim 1, wherein a first hollow distance is formed between the first upper panel and the first lower panel, the first hollow distance being 3mm to 20 mm;

9. The tubular fabric with hollow structure of claim 1, wherein said upper fabric and said lower fabric are made of one or more of glass fiber, carbon fiber, basalt fiber, quartz fiber, silicon carbide fiber, aramid fiber, and ultra-high molecular weight polyethylene fiber.