A composite fiber web having superior heat resistance and sound absorption and including a center layer containing a carbon fiber and a heat-resistant layer, and to a method of manufacturing the same. The method of the present invention can exhibit a fast manufacturing speed through a melt-blowing process that will generate economic benefits. The composite fiber web includes a composite layer and individual layers with various fiber diameters resulting in a superior sound absorption rate. The PET fiber included in the heat-resistant layer of the composite layer is an environmentally friendly material with superior heat resistance due to the inclusion of ultrafine fiber. Also, the composite fiber web has superior strength, conductivity, and electromagnetic shielding and deodorization effects, which allows it to be widely utilized for sound absorption materials and in all application fields thereof.

A composite fiber web having superior heat resistance and sound absorption and including a center layer containing a carbon fiber and a heat-resistant layer, and to a method of manufacturing the same. The method of the present invention can exhibit a fast manufacturing speed through a melt-blowing process that will generate economic benefits. The composite fiber web includes a composite layer and individual layers with various fiber diameters resulting in a superior sound absorption rate. The PET fiber included in the heat-resistant layer of the composite layer is an environmentally friendly material with superior heat resistance due to the inclusion of ultrafine fiber. Also, the composite fiber web has superior strength, conductivity, and electromagnetic shielding and deodorization effects, which allows it to be widely utilized for sound absorption materials and in all application fields thereof.

An object of the present invention is to provide a carbon fiber nonwoven fabric which has excellent electrical conductivity and thermal conductivity as an electrode base material for a polymer electrolyte fuel cell and which is useful as a base material excellent in gas diffusibility and drainage performance. The present invention provides a carbon fiber nonwoven fabric on a surface of which a plurality of non-through pores each having an opening area larger than the average pore area of the carbon fiber nonwoven fabric are dispersively formed, the carbon fiber nonwoven fabric having no broken fibers observed on the peripheral edge portions of the non-through pores in plane view.

An object of the present invention is to provide a carbon fiber nonwoven fabric which has excellent electrical conductivity and thermal conductivity as an electrode base material for a polymer electrolyte fuel cell and which is useful as a base material excellent in gas diffusibility and drainage performance. The present invention provides a carbon fiber nonwoven fabric on a surface of which a plurality of non-through pores each having an opening area larger than the average pore area of the carbon fiber nonwoven fabric are dispersively formed, the carbon fiber nonwoven fabric having no broken fibers observed on the peripheral edge portions of the non-through pores in plane view.

The present disclosure provides systems and methods for forming a composite structure comprising rotating a base layer of an apparatus for forming the composite structure about an axis of rotation, transferring carbon short fibers from a first vibratory feed ramp onto the base layer in order to form a plurality of fibrous layers in the composite structure, and vibrating the first vibratory feed ramp during the transferring the carbon short fibers. The base layer may comprise an annular shape.

The present disclosure provides systems and methods for forming a composite structure comprising rotating a base layer of an apparatus for forming the composite structure about an axis of rotation, transferring carbon short fibers from a first vibratory feed ramp onto the base layer in order to form a plurality of fibrous layers in the composite structure, and vibrating the first vibratory feed ramp during the transferring the carbon short fibers. The base layer may comprise an annular shape.

A primary base fabric for a tufted carpet includes a first non-woven web and a second non-woven web laminated on each other. The first non-woven web is constituted with a first constituent fiber formed with a first thermoplastic resin and containing carbon. The second non-woven web is constituted with a second constituent fiber formed with a second thermoplastic resin and having a carbon content lower than the carbon content of the first constituent fiber or containing no carbon. The primary base fabric is a product prepared by combining the first non-woven web and the second non-woven web through an emboss processing.

A primary base fabric for a tufted carpet includes a first non-woven web and a second non-woven web laminated on each other. The first non-woven web is constituted with a first constituent fiber formed with a first thermoplastic resin and containing carbon. The second non-woven web is constituted with a second constituent fiber formed with a second thermoplastic resin and having a carbon content lower than the carbon content of the first constituent fiber or containing no carbon. The primary base fabric is a product prepared by combining the first non-woven web and the second non-woven web through an emboss processing.

A carbon aerogel composite is disclosed. A carbon fiber is coated with a conductive carbon aerogel. An aerospace-vehicle component, aerospace vehicle or aircraft or lighting guard can include carbon fibers coated with a conductive carbon aerogel, strands comprising carbon fiber coated with a conductive carbon aerogel, woven fabrics comprising carbon fiber coated with a conductive carbon aerogel, or nonwoven fabrics comprising carbon fiber coated with a conductive carbon aerogel.

Glass fiber products, including glass fiber mat and insulation products, are described. A glass fiber mat may include glass fibers and a binder. The binder may include cured products from a carbohydrate binder composition. The carbohydrate binder composition may include a carbohydrate, a nitrogen-containing compound, and a thickening agent. The carbohydrate binder composition may have a Brookfield viscosity of 7 to 50 centipoise at 20? C. as measured with a Brookfield viscometer using spindle 18 at 60 rpm. Glass fiber mats may include a component of a roofing shingle. Glass fiber mats may be a facer, battery separator, a filtration media, or a backing mat.