MXPA00000510A - Reinforced knitted structure comprising metal fibres - Google Patents

Abstract

The invention relates to a single-bed weft-knitted textile structure comprising stainless steel fibre bundles, in which a reinforcing multifilament insert yarn with a titre of less than 180 Tex is incorporated with tuck stitches into the textile structure in a regular pattern. The insert yarn is, for example, a multifilament stainless steel yarn, or a multifilament glass fibre yarn. In addition, the invention relates to the use of such a textile structure for covering moulds and tempering or press rings which are utilized in the process of forming glass plates, or for the covering of transportation means for glass plates during their forming process.

Description

REINFORCED WOVEN STRUCTURE COMPRISING METAL FIBERS DESCRIPTION OF THE INVENTION The invention relates to a woven textile structure comprising bound metal fibers and in which an inserted yarn of reinforced multifilaments is incorporated. The woven structures comprise bundles of metal fibers described in PCT patent application WO 97/04152 of the applicant and are used in various fields of the application. These woven fabrics are quite heavy as a result of the high specific gravity of the stainless steel fibers which are constructed. This is certainly the case when the woven fabrics are reinforced with an inserted yarn that is of the same type as the woven yarn. The very high weight of those woven fabrics thereof may result in some downward sagging when used as a cover for various supports. This means that the woven fabrics do not always remain equally close to the fixed position to the molded contact supports (more or less horizontal). For certain applications, this constitutes a significant drawback. By incorporating a relatively thick, conventional inserted thread, it necessarily results in a woven fabric with relatively long seams. For many applications, however, there is a need for a woven structure with small seams and reinforcements with an insert. But this requires high calibration during weaving, which is not possible if a conventional insert yarn is incorporated into a woven structure. Furthermore, during the production of such reinforced woven fabric there is a real possibility of woven defects and damage to the weaving machine. It is an object of the invention to provide a textile structure of thin and relatively light, reinforced fabric comprising bundles of metal fiber and which is handled to avoid the drawbacks of the woven fabrics suitably reinforced described above. In particular, the invention provided for a woven fabric of a bed comprises bundles of stainless steel fiber in which a multifilament insert yarn reinforced with a linear mass of at least 180 Tex is incorporated into a textile structure in a regular pattern, for example, by means of 'folding stitches. ~~ Metal fibers (for example made from a type of steel of the AISI 300 or 400 series, Fecrally ©, Aluchrome © or Nicralloy® which are used in the textile structure according to the invention can be obtained by shaving the edge of the fabric. a sheet roll as described in U.S. Patent 4930199, or by the tied warp technique, as described for example in US 3379000. The metal fibers have an equivalent diameter which is comprised to be between 2 and 100 μm , and preferably between 2 and 40 μm The equivalent diameter is defined herein as the diameter surface area as that of the current fiber in question The insert yarn of multifilaments which is incorporated in the woven textile structure in accordance The invention can be a multifilament metal or a glass yarn consisting of between 30 and 1500 filaments In this way, for example, the insert yarn can be continuous Bekinox © V yarn N which is comprised of between 70 and 300 stainless steel filaments having an equivalent diameter of between 2 and 30 μm. The portion by weight of the insert in the textile structure is typically less than 35%. In another embodiment, a multifilament fiberglass insert yarn can be incorporated into the textile structure which, for example, is composed of glass fibers of the type E- or C- with a diameter of between 7 and 9 μm. On an average, such glass strands comprise from 30 to 150 filaments. In this way there is a multifilament fiberglass yarn consisting, for example, of simple yarns, each containing 22 glass filaments C- having a diameter of 7μm and being twisted together. The weight portion of the insert yarn in the textile structure is less than 25%. The previously mentioned problem of sagging of the textile structure is thus solved by the use of a relatively light insert thread, which results in a woven fabric that is light in weight and that limits the elasticity of the textile structure in the weft direction. This is a very favorable factor for many applications, which include the use of the textile structure as a cover for support structure that are used in the process of forming and molding glass plates, such as car windows, as will be explained in the next. However, a mulfilament insert yarn is stronger than a conventional yarn insert yarn of the same thickness, so with a thinner insert yarn a woven fabric can be obtained which is at least equally strong. In addition, a thinner insert yarn prevents the seam formation process to a lesser extent so that with the same gauge a thin woven fabric (with small seams) can be obtained as compared to the correspondingly conventional reinforced product. In addition, a thinner insert yarn (with pleat seams) makes it possible to produce reinforced woven fabrics with higher gauges than is conventionally possible.

The woven weft structure according to the invention is either thin or circularly woven and is flexible. The textile structure has a weight that is between 600 and 2000 g / m2. This air permeably is greater than 400 L / dm2 / min with a drop pressure at 100 Pa. EXAMPLE The woven fabric textile structure has a cover support for molded elements which are in contact with the glass plates during the molding process. A greater number of glass fiber fabrics are conventionally used in the manufacture and molding of car windows, for example for covered molds, pressure and tempering rings, glass transport means etc. These fabrics are not very resistant to wear, however, and result in less optical quantity in sheets of glass so molded. The use of woven structures containing metal fibers is also known by this application. In PCT patent application WO 94/01373 of the Applicant, for example, heterogeneously woven fabrics are described, if not reinforced with an additional insert yarn, which is of the same type as the woven yarn. This product is treated with double bed woven fabrics and its insert thread is not incorporated with fold seams.

These heavy conventional woven fabrics show the drawback that during use they buckle down a little under their own weight. The causes of this are that the fabrics lose a certain amount of resistance to high temperatures, and that each time the glass is pressed, the cover is subject to a sliding traction and a little of the metal fibers remain adhered to the sheet. glass For the application under discussion in this example, however, it is of the utmost importance that the fabric always cover being closely adapted to the support structure below or above the formation contact in order to the dimensional, edited discharges, defects in the glasses and / or obstructions of the production line in the glass formation process. As a concrete example of the textile fabric woven according to the invention can be used for the application seen here, with a circular woven structure was comprised of stainless steel type AISI 316L, reinforced with continuous Bekinox® VN wire of multifilaments having a linear mass of 110 ex, and comprising 90 filaments with van of average diameter of 14 μm. The weight of this woven textile structure is 1685 g / m2. This area permeably is 540 L / min / dm2, in a pressure drop of 100 Pa. The weight portion of the textile structure comprised by the inserted multi-filament yarn is 32%. Through the use of a thinner insert yarn, the weight of the woven fabric itself is smaller, so the woven fabric will sink less or nothing. The use of a thinner insert yarn makes this possible to produce woven fabrics with small stitches and / or higher calibers, which result in better optical properties in the molded glass sheet. Despite these small seams, the woven fabric nevertheless remains sufficiently permeable of air. In addition, the woven textile structures in which an insert yarn is incorporated have a longer width than the textile structures without insert yarn, which make this possible to form long glass plates, in particular car or windshield windows, or very good optical quality

Claims (12)

1. CLAIMS 1. A woven textile structure of a bed comprising bundles of stainless steel fiber, characterized in that a multifilament insert yarn reinforced with a linear mass or less than l_? Tex is incorporated into the textile structure in a regular pattern with fold seams.
2. 2. The textile structure according to claim 1, characterized in that the textile structure is woven flat or circular.
3. 3. The textile structure according to claim 1, characterized in that the weight of the textile structure is between 600 and 2000 g / m2. .
4. The textile structure according to claim 1, characterized in that the air permeability of the textile structure is more than 400 L / dm2 / min with a pressure decrease of 100 Pa.
5. 5. The textile structure according to claim 1, characterized in that the fiber bundles comprise fibers with an equivalent diameter that is between 2 and 100 μm.
6. The textile structure according to claim 1, characterized in that the bundles of metal fiber comprise fibers with an equivalent diameter that is between 2 and 40 μm.
7. 7. The textile structure according to claim 1, characterized in that the multifilament yarn is comprised in an average of between 30 and 1500 filaments.
8. 8. The textile structure according to claim 1, characterized in that the insert thread is a multifilament stainless steel wire.
9. The textile structure according to claim 8, characterized in that the weight portion of the insert yarn in the textile structure is less than 35%.
10. 10. The textile structure according to claim 1, characterized in that the insert yarn is a fiberglass yarn.
11. The textile structure according to claim 10, characterized in that the portion by weight of the weft yarn in the textile structure is less than 25%.
12. 12. The use of a textile structure according to claim 1, characterized in that it uses pressure or tempered rings and molds covered in the information process of glass plates, or to cover means of transportation by glass plates during its process of training