B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
19/26, 92/62
B32B 5/12 (2006.01) D04H 1/74 (2006.01)
Patent
CA 1045772
A B S T R A C T A non woven fabric having alternating stripes of high fiber density and low fiber density has fibers of at least 1/2" in length and fibers of less than 1/2" in length, preferably under 1/4" in length. The fabric is made in such a manner as to produce parallel twistless ribbon strands in the high fiber density areas containing both short and long fibers. The twistless ribbon strands are bridged together by the long fibers so as to form the non- woven fabric. A majority of the bridging long fibers have at least a portion of their length included in adjacent twistless ribbon strands; said ribbon strands having at least one strand width space between said ribbon strands. A majority of said short fibers are disposed in said high fiber density areas together with a majority of said long fibers, both being oriented in sub- stantially one direction, for example, the machine direction, while sub- stantially all of the long fibers in the adjacent and bridging low fiber density areas are oriented in a direction substantially normal to that direction. The short fibers in the fabric may advantageously be paper fibers, cotton linters, thermoplastic fibers, or the like, thereby greatly enhancing some of the product characteristics while greatly reducing the cost of raw materials used therein. Furthermore, the use of these short fibers greatly enhances the sharpness and resolution of the stripes as well as increases the bulk of the high density stripes or strands. Some of the fibers in the fabric, as stated above, may be of a thermoplastic nature so that, when heated, they will provide a binder for the fabric.
261564
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