Abstract: A stretchable high density woven fabric showing a cover factor of from 1,800 to 2,540 and stretchability in terms of a stretch ratio of from 5 to 20% in the warp or weft direction and having a poly(trimethylene terephthalate) fiber at least in the direction in which the woven fabric shows stretchability. The high density woven fabric shows good stretchability and water resistance (water pressure resistance), produces less rustling when contacted with woven fabrics, and provides an excellent soft and comfortable feeling, and it is therefore appropriate for sportswear, outerwear, and the like.

Abstract: A hollow weave air bag, a configuration of a boundary line between a hollow portion (6) and a peripheral portion (4) of a single layer weave bonding band of which is a curve obtained by that an optional point on an equation L=R(1+P/2.times.cos 4.theta.) draws by changing an angle .theta., wherein:L stands for a length of a straight line between a center (c) of a hollow portion (6) and the boundary line (7);.theta. stands for an angle (radian) formed between a warp axis of a woven fabric and a straight line connecting an optional point (A) on the boundary line to a center (C) of the hollow portion (6);R stands for a mean value of a radius of a circumscribed circle and a radius of a inscribed circle;P stands for a ratio of a difference between the radius of the circumscribed circle and the radius of the inscribed circle against the mean radius R;O<P.ltoreq.0.

Abstract: An air bag having improved characteristics of preventing rebounding, a light weight and a lower price, wherein a bag-like body having an opening for attaching a gas generator is manufactured by joining circumferential portions of at least two woven fabrics, a coating film is partially provided on a surface of the bag-like body to reinforce the bag-like body and prevent injury to a passenger, and an exhausting portion is provided by suitably determining an area where the coating film is not provided according to an air permeability of the woven fabric. A further improvement of the performance and a cost reduction of the air bag can be obtained by forming the joining portion with a binding-to-one layer weave.

Abstract: A multilayer fabric including a plurality of layers of distinct fabrics each consisting of ground warps, ground wefts, connecting warps connecting the layers of the distinct fabrics, and temporary wefts which can be broken by external action after weaving. These temporary wefts are, for example, made of weaker yarn compared with the other yarn, so when the external action is applied to the multilayer fabric, there is no chance of damaging the connecting yarn. Thus, the multilayer fabric can easily be expanded to a large thickness.Also, a fabric form made of the multilayer fabric and composite structure made of the fabric form and filling matter.

Abstract: A filter medium comprising one fibrous web or a plurality of piled and integrated fibrous webs is provided. The web or webs are composed mainly of ultra-fine combustible synthetic fibers having a single fiber diameter of 0.1 to 1.5.mu.. The constituent fibers in each web are entangled with one another in various directions and satisfy the following requirements:(i) the fiber packing ratio .alpha. (%), defined by the formula: .alpha.=(.rho.'/.rho.).times.100 (.rho.=true density of the fibers, .rho.'=apparent density of the filter medium), is in the range of 20.gtoreq..alpha..gtoreq.3,(ii) the ratio S.sub.B /S.sub.A of the actually measured surface area S.sub.B (m.sup.2) of the fibers per m.sup.2 of the filter medium to the total surface area S.sub.A (m.sup.2) expressed by the formula: S.sub.A =(9000.pi..phi.w)/d (d mean single fiber denier, .phi. the means single fiber diameter (m) and W basis weight (g/m.sup.2) of the filter medium) is in the range of1>S.sub.B /S.sub.A .gtoreq.0.