A method for manufacturing a one-piece woven (OPW) air bag includes method for manufacturing an OPW airbag. The method includes providing yarns, warping the yarns on at least one beam of a loom, and simultaneously weaving yarns into a fabric air bag structure having two layer portions defining an inflatable volume and single layer portions forming seams delimiting the inflatable volume. A plurality of the yarns overlay one another to form nonwoven alignment elements in at least one of the single layer portions. The air bag structure is cut to define the OPW air bag. The alignment elements are aligned with alignment elements on a panel. The air bag structure is sewn to the panel with the alignment elements aligned with one another.

Provided are a base cloth for a material and a manufacturing method therefor, the base cloth suppressing opening of a boundary portion between an expanding part and a non-expanding part when used in a bag body, having low dynamic air permeability, and being capable of exhibiting the characteristic of being unlikely to burst even at high temperatures. A fabric base cloth for a material according to the present invention is composed of fibers having a prescribed thread breaking strength value, and for which the cloth surface is not subjected to resin coating, laminating, or a resin impregnation treatment.

A method for manufacturing a one-piece woven (OPW) air bag includes providing yarns and warping the yarns on at least one beam of a loom. Yarns are simultaneously woven into a fabric air bag structure having two layer portions defining both an inflatable volume and non-inflatable portions and single layer portions forming seams delimiting the inflatable volume. The air bag structure is cut to define the OPW air bag and at least one opening extending through only one layer of the two layer portions.

A method for producing a woven fabric comprises weaving fibers in a warp direction and a weft direction to form a fabric having a top surface and a bottom surface, wherein the warp fibers and weft fibers each comprises one or more filaments of a synthetic polymer having substantially uniform cross-sectional composition. At least a portion of the filaments in the fibers on the top and/or bottom surface of the fabric are then fused together in the presence of a heat transfer liquid or vapor added during the fusing step or added in a prior step of the fabric production process and retained by the filaments. The fusing step produces a treated fabric having a tensile strength in both the warp and weft directions of 1000 N or greater and having, in the absence of any coating, a static air permeability (SAP) of 3 l/dm.sup.2/min or lower.

A method for producing a woven fabric comprises weaving fibers in a warp direction and a weft direction to form a fabric having a top surface and a bottom surface, wherein the warp fibers and weft fibers each comprises one or more filaments of a synthetic polymer having substantially uniform cross-sectional composition. At least a portion of the filaments in the fibers on the top and/or bottom surface of the fabric are then fused together in the presence of a heat transfer liquid or vapor added during the fusing step or added in a prior step of the fabric production process and retained by the filaments. The fusing step produces a treated fabric having a tensile strength in both the warp and weft directions of 1000 N or greater and having, in the absence of any coating, a static air permeability (SAP) of 3 l/dm.sup.2/min or lower.

Provided are an airbag base cloth and an airbag including same, the airbag base cloth being a flexible and lightweight airbag fabric on which films are laminated, having good rubbing resistance after withstanding heat/wet heat, and providing excellent internal pressure retention within the airbag after sewing. The airbag base cloth according to the present invention is characterized in that at least one face of fabric is coated with a multilayer film having an adhesive layer, and the average value of the warp and weft slippage resistance in the base cloth is 350 N/2.5 cm or more.

A non-coated air bag fabric according to the present invention includes a plurality of weft yarns and a plurality of warp yarns, in which the weft yarns and the warp yarns are constituted by multifilament yarns in which polyethylene terephthalate fibers are used, the number of filaments in each of the multifilament yarns ranges from 122 to 242, and a coefficient of kinetic friction of a surface of the fabric ranges from 1.15 to 1.25 or less, the coefficient of kinetic friction being calculated when a friction block in which polyvinyl chloride is used is brought into contact with the fabric placed on a stage that is rotating at a rotation speed of 663 rpm, at a load of 5 N, using a torque type friction and wear tester.

A non-coated air bag fabric according to the present invention includes a plurality of weft yarns and a plurality of warp yarns, in which the weft yarns and the warp yarns are constituted by multifilament yarns in which polyethylene terephthalate fibers are used, the number of filaments in each of the multifilament yarns ranges from 122 to 242, and a coefficient of kinetic friction of a surface of the fabric ranges from 1.15 to 1.25 or less, the coefficient of kinetic friction being calculated when a friction block in which polyvinyl chloride is used is brought into contact with the fabric placed on a stage that is rotating at a rotation speed of 663 rpm, at a load of 5 N, using a torque type friction and wear tester.

The invention relates to a suction belt (1) for transporting tobacco and/or filter material during the production of cigarettes, comprising a flat belt material (7), which is shaped to form a ring, and a plurality of openings (11) which are distributed over the surface of the belt material (7). At least 75% of all the openings (11) have a clear width of 0.3 mm or less.

The invention relates to a suction belt (1) for transporting tobacco and/or filter material during the production of cigarettes, comprising a flat belt material (7), which is shaped to form a ring, and a plurality of openings (11) which are distributed over the surface of the belt material (7). At least 75% of all the openings (11) have a clear width of 0.3 mm or less.