Safety belts are now effectively standard in most road vehicles, but new versions are still being developed with the objective being to combine low residual stiffness and reduced friction to assist in retraction of the webbing. Narricot Industries (Cheltenham, USA) has disclosed a woven construction for an improved belt fabric. In European Patent EP 1 008 680, Narricot Industries says that the fabric's warp yarns are arranged in two groups, with the second having a higher density across its width than those in the first. The new webbing has two faces and is flexible from a first - and generally flat - position to a second - flexed - position. When the webbing is flat the first and second groups of warp yarns on one fabric face define a generally smooth surface. When flexed at least a portion of the second group of warp ends in the transition area protrude, at least partially, from the otherwise smooth surface to reveal a number of ribs. A belt of this type is woven on a needleloom and usually has a knitted edge. The belt consists of a number of warp ends while the weft may be a continuous filament. This is inserted into the fabric by a carrier or needle. The fabric is made with a knitted edge using one or more catch-cord yarns and/or lock-stitch yarns along the edge. Tension is controlled on the locking yarns to ensure an even edge. In the weave the warp ends have a density that varies across the width of the shed, which normally will be the same as the webbing. These will be divided into a first group and a second group. It is this second group of ends that has a higher density across their width than the first. The first and second groups of warp ends are woven in different weaves. However, preferably, the edge portions are mirror images of one another. It is also recommended that there be at least three equally spaced groupings of ends. The first group of ends will be woven with weft in a four harness twill, with two weft ends for each shed as this is being made on a needleloom.
Seat-belt improvements
Verbesserter Sicherheitsgurt
Advances in Textiles Technology ; Nov ; 9-10
2000
2 Seiten, 1 Bild
Article (Journal)
English
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