Fabric and method of reception

 

The invention relates to woven materials with a peculiar arrangement of threads and can be used in the manufacture of composite materials. Describes fabric that includes two families of mutually perpendicularly oriented warp and weft threads, the axes of which have the form of helical lines. According to the invention, the helical threads of each family are twisted oppositely with respect to the threads of another family, and any thread, perebivaias thread in a different site collection, simultaneously covers on each pass adjacent threads of his family. The proposed weave provides greater density and strength of the fabric while maintaining a high bending flexibility. Proposed method of implementation of this weave, which, according to the invention in that thread previously give the necessary rigidity, then out of the warp threads to form the frame, then through the rollers screwed weft threads in the desired position. 2 C. p. F.-ly, 4 Il.

The invention relates to the field of woven materials, and in particular to fabrics with a peculiar arrangement of threads.

Known weave (plain is Letenye and analysis of tissues. - M.: 1968). The disadvantage of this weave is limited bond strength filaments with each other.

Known openwork interlacing performed using the Leno threads that perebivaias with the weft threads, at the same time in pairs perelivajutsa with each other (USSR Author's certificate No. 1440973, IPC 7 D 03 D 1/00, 30.11.88,). The disadvantage of this weave is that the Leno threads are essentially broken down into a system of twisted pairs of threads, not connected with each other directly. The weft threads are also not bound to each other.

From U.S. patent 6276121, IPC 7 D 02 G 13/02, 21.08.2001, known fabric having basis and weft yarns in the form of helical lines. This fabric and how you can get it taken as a prototype of the claimed invention.

The objective of the invention is to increase the bond strength of the filaments to each other by maximizing the number of threads that can cover within the rapport each individual thread.

This task is solved in that tissue, including two families of mutually perpendicularly oriented warp and weft threads, the axes of which have the form of helical lines, according to the invention, helical threads each CE the other family, simultaneously covers on each pass adjacent threads of his family.

That is, if, for example, the warp threads are in the form of the right screw, the weft threads must be in the form of left screw, and Vice versa. Any thread, perebivaias thread in a different site collection, simultaneously covers on each pass adjacent threads of his family.

The above fabric is produced by the method comprising forming a family of one-directional oriented threads and weave them with family perpendicularly oriented filaments having a spiral shape. According to the invention, the threads give the necessary rigidity, then out of the warp threads to form the frame, then through the rollers screwed weft threads.

The invention is illustrated in the drawings.

In Fig.1 shows the principal structure of the fabric offered weave.

In Fig.2 shows a variant most dense fabric offered weave.

In Fig.3 shows the location on the surface of the individual filaments of contact with adjacent filaments for option most dense fabric.

In Fig.4 schematically shows how the implementation of the proposed weave. The image shown in the plane of the cross section of the tissue is also shown, rollers 3 for screwing weft yarns in accordance with the proposed method of implementation of this weave.

The maximum density of the offered fabrics are achieved when the ratio of the radius of the filament to the radius of the helical line of the thread axis is about 1:3 (Fig.2). This produces a single layer, but dense and homogeneous tissue without gleams with the volume of pores of not greater than 40%. The structure of the resulting fabric is such that no deformation of the original helical configuration any thread on each pass has 12 points of contact with other threads (Fig.3). These points are fairly evenly spaced along the length of the coil to ensure even distribution of any load between all threads of the fabric.

Despite the fact that the thickness of the offered fabric is determined by the diameter of the helical line of the thread axis, such fabric detects a sufficiently high Flexural ductility in comparison with multilayer fabrics of comparable thickness. This is because each thread works as a coil spring, allowing significant bends, does not lead to significant change of the stress state of a thread.

It is known that a significant part of the resource threads tissue is often spent at the stage of manufacture of the fabric, due to the need for multiple kinks threads for sufficiently small radii of curvature. We offer PE is but the proposed method the thread is pre-attached screw form and the necessary rigidity or by special smoothing (elastic materials), either directly on the stage of manufacture (for brittle materials, such as fiberglass, carbon fiber, etc). Further threads of the same family, such as foundations, assemble the frame, topologically equivalent to the net “netting”, which is then screwed weft threads, setting them thus in the desired position (Fig.4). With this method of manufacture of the fabric threads do not experience deformation and become part of the fabric in its original configuration.

When carrying out the invention may be obtained from the technical result consists in the reduction of damage to the threads during manufacture of the fabric, enhancing the bond strength of the threads and as a result increasing the strength of the fabric as a whole.

Technical and economic advantage of the invention is the possibility of reducing the cost of materials when choosing fabric specified strength, to simplify and cheapen the manufacture of fabrics offered weave.

Claims

1. Fabric, including two families of mutually perpendicularly oriented warp and weft threads, the axes of which have the form of helical lines, characterized in that the helical threads of each family are twisted simultaneously covers on each pass adjacent threads of his family.

2. A method of obtaining a tissue, including the formation of a family of unidirectional oriented threads and weave them with family perpendicularly oriented filaments having a spiral shape, characterized in that thread previously give the necessary rigidity, then out of the warp threads to form the frame, then through the rollers screwed weft threads.



 

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