A method for laying down a nanoweb of nanofibers from a centrifugal spinning process by a combination of an air flow field and a charging arrangement. Fibrous streams in the form of fibrils of molten polymer or polymer solution are discharged from a rotating member into an air flow field that is essentially parallel to the direction of discharge of fibrils at the point of discharge of the fibrils. The fibrous streams are attenuated and directed by means of the air flow field onto the surface of a collector to form a nanoweb. The fibrous streams are charged along all or at least a portion of their route from the point of discharge to the surface of the collector.

A method for laying down a nanoweb of nanofibers from a centrifugal spinning process by a combination of an air flow field and a charging arrangement. Fibrous streams in the form of fibrils of molten polymer or polymer solution are discharged from a rotating member into an air flow field that is essentially parallel to the direction of discharge of fibrils at the point of discharge of the fibrils. The fibrous streams are attenuated and directed by means of the air flow field onto the surface of a collector to form a nanoweb. The fibrous streams are charged along all or at least a portion of their route from the point of discharge to the surface of the collector.

The present invention is an electrospun web including a carrier substrate and an electrostatically charged nanofiber. The electrospun web has a pressure drop of about 5 mmH2O or less, a percent penetration of about 50% or less, and a clarity of about 80% or more.

The present invention is an electrospun web including a carrier substrate and an electrostatically charged nanofiber. The electrospun web has a pressure drop of about 5 mmH2O or less, a percent penetration of about 50% or less, and a clarity of about 80% or more.

The present invention relates to a polyester nonwoven fabric with suppressed reduction in physical properties by a tufting process, a method for manufacturing same, and a backing fabric for a carpet, comprising same and, in particular, to: a polyester nonwoven fabric in which, by controlling the physical properties of fibers of a first component filament and a second filament, a reduction in physical properties is remarkably suppressed before/after a tufting process, thus enabling the manufacture of a carpet backing fabric with excellent mechanical properties; a method for manufacturing same; and a backing fabric for a carpet, manufactured thereby.

Provided is artificial leather which has excellent flexible texture, wear resistance, and nubuck outer surface having a dense feeling. The present disclosure relates to napped artificial leather containing an entangled sheet, and a polymer elastomer filled into the entangled sheet, the napped artificial leather being characterized in that: the entangled sheet has a structure of two or more layers formed from a fiber layer (A) on the front surface side of the napped artificial leather, and a scrim in contact with the fiber layer (A); the average diameter of the fibers constituting the fiber layer (A) is 2.0-7.0 m; and when measuring porosity in the thickness direction and defining the minimum porosity in the fiber layer (A) as .sub.Amin(%), the minimum porosity in the scrim as .sub.Smin(%), and the maximum porosity from the position of the .sub.Amin(%) to the position of the .sub.Smin(%) as .sub.A-Smax(%), 40.sub.Amin70, 70.sub.A-Smax90, and .sub.Smin(%)<.sub.A-Smax(%) are satisfied.

A filling material and method for reducing the amount of filling material required for filling a soft casing to a pre-selected specification, the filling material comprising a blend of polyester fibers having two or more different deniers and providing at least a 6% reduction in the amount of filling material required as compared to an alternative fill material consisting solely of polyester fibers of a single denier wherein the soft casing filled with the filling material meets pre-selected specifications comprising a pre-selected height measurement for the filled soft casing and is substantially the same in appearance as a soft casing filled with the alternative fill material consisting solely of polyester fibers of a single denier.

A filling material and method for reducing the amount of filling material required for filling a soft casing to a pre-selected specification, the filling material comprising a blend of polyester fibers having two or more different deniers and providing at least a 6% reduction in the amount of filling material required as compared to an alternative fill material consisting solely of polyester fibers of a single denier wherein the soft casing filled with the filling material meets pre-selected specifications comprising a pre-selected height measurement for the filled soft casing and is substantially the same in appearance as a soft casing filled with the alternative fill material consisting solely of polyester fibers of a single denier.

A heat transfer suppression sheet contains a first inorganic particle, a resin binder; and an organic fiber, in which the organic fiber has a glass transition point higher than a glass transition point of the resin binder. At least a part of the organic fiber may be fused each other to form a three-dimensional framework.

The present invention is an invention about ultra-light down padding and a web for down padding used in its manufacture, and relates to ultra-light down padding having a thin thickness, excellent insulation and excellent elasticity in 4-way (or multi-directions), and a web for down padding used for manufacturing the same.