A base fabric for an airbag has a puncture load equal to or more than 6.0 N, wherein values obtained by dividing a bending stiffness (method A of JIS L 1096(2010)8.21) in each of a warp direction and a weft direction by a cover factor are equal to or less than 0.030 mm.

The present invention addresses the problem of providing: a coated fabric for airbags that is less likely to have yarn slippage after being sewn, and that can also be compactly stored; and an airbag using the coated fabric. As means for achieving this object, a coated fabric for airbags that has a crimp ratio of 12% or more in the warp direction and a crimp ratio of 6% or less in the weft direction is provided.

An OPW airbag has warp and weft threads woven together in a lower fabric layer, an upper fabric layer and a middle fabric layer arranged therebetween. The airbag has, arranged along a longitudinal axis, front, middle and rear portions. A generator mouth and an inflow region are in the front portion. Upper and lower main chambers are in the middle portion. A first plurality of lower stiffening chambers is in the rear portion between the middle and lower fabric layers. A second plurality of upper stiffening chambers is in the rear portion between the middle and upper fabric layers. At least one upper stiffening chamber, which is narrower compared to the lower stiffening chamber, is associated with each lower stiffening chamber. The lower stiffening chambers are each spaced apart by lower woven seams. Bridge chambers, which cover the lower woven seams, are arranged between the middle and upper fabric layers.

A non-coated base fabric for an airbag is made of a polyamide fiber, wherein a CV value of the dynamic air permeability by the ASTM D6476 method is 6.0% or less, a CV value of the air permeability at a differential pressure of 500 Pa by the ASTM D3886 method is 10.0% or less, and a CV value of the air permeability at a differential pressure of 20 KPa is 10.0% or less, which are measured every 20 cm in a weft direction of the base fabric.

An uncoated woven fabric of yarn formed from synthetic fibers woven in the warp direction and weft direction to form a top surface and a bottom surface wherein at least a portion of the yarn on the top surface or at least a portion of the yarn on the bottom surface has fibers with a permanently modified cross-section and that are fused together is provided. Methods for production and use of this fabric in application to products such as automobile airbags, sailcloths, inflatable slides, temporary shelters, tents, ducts, coverings and printed media are also provided.

A base fabric for an airbag is formed of a polyamide fiber, wherein a CV value of a weaving density for every 20 cm in a base fabric weft direction is equal to or less than 0.5%, and original-yarn strength usage rates in the warp direction and the weft direction are equal to or more than 85%.

In order to specify an automated method and an apparatus enabling a quick, reliable and reproducible quality assurance and being easily integrated in existing machines, a cutting machine is specified, comprising: a conveyor (10) for conveying flexible material (100); a machining unit (20) for cutting the flexible material (100) into material parts (200); a recognition unit (30) for detecting the flexible material (100) and/or at least one cut material part (200), the recognition unit (30) being arranged in the conveying direction after the machining unit (20), and a control unit (50) configured to generate a quality result and to control the cutting machine based on information of the recognition unit (30) and/or on marking information.

The present disclosure pertains to: polyamide fibers for an airbag which are characterized in that the fiber size thereof is 200-800 dtex, inclusive, and the stress retention rate thereof when obtained using a prescribed procedure is at least 3.0%; and a method for producing said polyamide fibers for an airbag, the method being characterized in that during the thermosetting step and the relaxing step thereof, the contact time between thread and a roller which is at least 190° C. is at least 30 msec and less than 110 msec, the temperature of the thermosetting roller is 190-205° C., inclusive, the temperature of the relaxing roller is greater than 100° C. and less than 190° C., and the speed ratio of the relaxing roller to the thermosetting roller satisfies this equation: 1.00<relaxing roller speed/thermosetting roller speed<1.10.

Provided is a non-coated air bag fabric capable of solving problems regarding smoothness of a fabric surface while having low air permeability, and an air bag including the same. The non-coated air bag fabric according to the present invention includes a plurality of weft threads and a plurality of warp threads, in which the weft threads and the warp threads are constituted by multifilament threads in which polyethylene terephthalate fibers are used, the number of filaments in each of the multifilament threads is 122 to 242, and a warp/weft average MMD (a mean deviation of coefficient of friction) of a surface is 0.02 or less.

A non-coated air bag base cloth of the present invention is constituted by a fabric formed using a yarn containing polyethylene terephthalate as a main raw material, in which a single fiber strength of a yarn of the fabric is 7.30 to 8.50 cN, a single fiber fineness of a yarn of the fabric is 1.6 to 3.9 dtex, and a cover factor is 2400 to 2800.