Abstract: A multilayer sheet can be used in vivo or in an environment in which moisture is adhered, an integrated sheet including the multilayer sheet and a base material, and methods for producing the same. The multilayer sheet has one or more layers from each of a layer (A) composed of sparingly water-soluble polymer and a fiber layer (B) composed of water-soluble polymer are laminated, and at least one of outermost layers is the above-described layer (A) composed of sparingly water-soluble polymer. The time taken from dropping of water onto a surface of the outermost layer of the above-described layer (A) composed of sparingly water-soluble polymer to dissolution of the other outermost layer is 10 seconds to 5 minutes.

Abstract: A laminate has at least one polylactic acid resin-containing layer (C) with a thickness of 10-500 nm on at least one surface of a fibrous structure (B) containing a water-soluble resin (A). A production method for the laminate is characterized in that water or an aqueous solution is applied to the joining surface of the fibrous structure (B) and the polylactic acid resin-containing layer (C). The laminate exhibits excellent followability, adherence and coatability relative to flexible, curved adherends, exhibits excellent compatibility to organs such as skin and internal organs, and, because the fibrous structure (B) containing a water-soluble resin (A) can easily be removed from the polylactic acid resin-containing layer (C) by the aqueous solution, is adapted for use in materials for external use on the skin, such as wound-dressing materials, adhesion-preventing materials, and skin care products.

Abstract: A melt-blown nonwoven fabric includes a fiber containing a thermoplastic resin, wherein apparent density is 0.1 to 0.4 g/cm3 and KES surface roughness of at least one surface of the fabric sheet is up to 1.2 ?m; and a method of producing the fabric includes conveying a web of the nonwoven fabric by sandwiching the web between two belt conveyers each including a belt having a smooth surface, providing a heat treatment zone where a surface of one or both of the belt conveyers has been heated to a temperature not lower than cold crystallization temperature of the thermoplastic resin and not higher than the temperature ?3° C. lower than melting temperature of the thermoplastic resin in at least a part of a course between the belts, and heating the nonwoven fabric web in the heat treatment zone by contacting both surfaces of the nonwoven fabric web with the belt.

Abstract: A melt-blown nonwoven fabric includes a fiber containing a thermoplastic resin, wherein apparent density is 0.1 to 0.4 g/cm3 and KES surface roughness of at least one surface of the fabric sheet is up to 1.2 ?m; and a method of producing the fabric includes conveying a web of the nonwoven fabric by sandwiching the web between two belt conveyers each including a belt having a smooth surface, providing a heat treatment zone where a surface of one or both of the belt conveyers has been heated to a temperature not lower than cold crystallization temperature of the thermoplastic resin and not higher than the temperature ?3° C. lower than melting temperature of the thermoplastic resin in at least a part of a course between the belts, and heating the nonwoven fabric web in the heat treatment zone by contacting both surfaces of the nonwoven fabric web with the belt.

Abstract: A multilayer sheet can be used in vivo or in an environment in which moisture is adhered, an integrated sheet including the multilayer sheet and a base material, and methods for producing the same. The multilayer sheet has one or more layers from each of a layer (A) composed of sparingly water-soluble polymer and a fiber layer (B) composed of water-soluble polymer are laminated, and at least one of outermost layers is the above-described layer (A) composed of sparingly water-soluble polymer. The time taken from dropping of water onto a surface of the outermost layer of the above-described layer (A) composed of sparingly water-soluble polymer to dissolution of the other outermost layer is 10 seconds to 5 minutes.

Abstract: A laminate has at least one polylactic acid resin-containing layer (C) with a thickness of 10-500 nm on at least one surface of a fibrous structure (B) containing a water-soluble resin (A). A production method for the laminate is characterized in that water or an aqueous solution is applied to the joining surface of the fibrous structure (B) and the polylactic acid resin-containing layer (C). The laminate exhibits excellent followability, adherence and coatability relative to flexible, curved adherends, exhibits excellent compatibility to organs such as skin and internal organs, and, because the fibrous structure (B) containing a water-soluble resin (A) can easily be removed from the polylactic acid resin-containing layer (C) by the aqueous solution, is adapted for use in materials for external use on the skin, such as wound-dressing materials, adhesion-preventing materials, and skin care products.

Abstract: A nonwoven fabric has excellent mechanical strength in addition to workability stabled with a high yield even with respect to heat applied when forming a membrane and manufacturing a fluid separation element, when the nonwoven fabric is used as a support for a separation membrane such as a reverse osmosis membrane. The nonwoven fabric has two surfaces having a difference in smoothness therebetween of 10 seconds to 50 seconds, and a boiling water curling height after treating in boiling water for 5 minutes of 0 mm to 8.0 mm.

Abstract: A mixed fiber nonwoven fabric comprising at least two types of fibers, namely, fibers of polyolefin based resin component A and fibers of polyolefin based resin component B, a fiber group containing fibers of polyolefin based resin component A being referred to as first fiber group, the first fiber group having a number average fiber diameter of 0.3 ?m to 7.0 ?m, part of the fibers of polyolefin based resin component B that have a fiber diameter in the range of 15 ?m to 100 ?m and not less than 5 times the number average fiber diameter of the first fiber group being referred to as second fiber group, the fibers of the second fiber group maintaining a form of fibers and existing in the cross section of the mixed fiber nonwoven fabric at a rate of 7.0 fibers or more per millimeter of the cross-sectional length, the melting point of polyolefin based resin component B being lower by 5° C. to 40° C.

Abstract: Provided are a mixed-fiber nonwoven fabric suitable for air filters and a filter medium using the mixed-fiber nonwoven fabric. The nonwoven fabric includes at least two types of fibers having different melting points, which fibers are low melting point fibers made of a polyolefin resin component A, and high melting point fibers made of a high melting point resin component B having a higher melting point than that of the polyolefin resin component A. The number average fiber diameter of the high melting point fibers is larger than that of the low melting point fibers. At least one high melting point fiber having a fiber diameter of 20 ?m to 100 ?m is present per 1.00 mm of the length of the cross section of the nonwoven fabric. The number average fiber diameter of all fibers constituting the nonwoven fabric falls within the range of 0.3 ?m to 10 ?m.

Abstract: A nonwoven fabric includes mixed fibers having different fiber diameters. A group of fibers having a fiber diameter of 5.0 ?m or less (fiber group A) is present at a volume fraction of 20 to 80 vol %, a group of fibers having a fiber diameter of 50.0 ?m or more (fiber group B) is present at a volume fraction of 1 to 40 vol %, and a group of fibers having a fiber diameter of more than 5.0 ?m and less than 50.0 ?m (fiber group C) is present at a volume fraction of 0 to 79 vol %. The ratio of the median fiber diameter (B?) of fiber group B to the median fiber diameter (A?) of fiber group A (B?/A?) is 35 or more.

Abstract: A method for producing a long fiber nonwoven fabric includes (a) melting resin containing polyphenylene sulfide as main component, discharging it from a spinneret, solidifying resulting filaments by cooling and stretching the filaments by pulling them out of an ejector at a spinning speed of 3,000 m/min or more while heat-treating as the filaments travel to the ejector outlet to provide a long fiber; (b) collecting the long fiber on a moving net to form a nonwoven web; and (c) subjecting the nonwoven web to thermal bonding.

Abstract: Provided are a composite fiber which consists primarily of resins comprising polyphenylene sulfide as their main constituents and which has both thermal dimensional stability and excellent thermal bondability, and a nonwoven fabric. The composite fiber consists primarily of component A and component B, the component A being a resin that includes polyphenylene sulfide as its main constituent, the component B being a resin that includes polyphenylene sulfide as its main constituent, having a higher melt flow rate than the component A, and forming at least part of the surface of the fiber.

Abstract: A separation membrane support includes a nonwoven fabric and has excellent membrane formability that achieves a high and stable yield when the separation membrane support supports various separation membranes, having excellent processability when a fluid separation element is produced, and having excellent mechanical strength. The nonwoven fabric has a boiling water shrinkage of ?0.2 to 2.0% in the length direction (longitudinal direction) after treatment in boiling water for 5 minutes.

Abstract: Provided are a mixed-fiber nonwoven fabric suitable for air filters and a filter medium using the mixed-fiber nonwoven fabric. The nonwoven fabric includes at least two types of fibers having different melting points, which fibers are low melting point fibers made of a polyolefin resin component A, and high melting point fibers made of a high melting point resin component B having a higher melting point than that of the polyolefin resin component A. The number average fiber diameter of the high melting point fibers is larger than that of the low melting point fibers. At least one high melting point fiber having a fiber diameter of 20 ?m to 100 ?m is present per 1.00 mm of the length of the cross section of the nonwoven fabric. The number average fiber diameter of all fibers constituting the nonwoven fabric falls within the range of 0.3 ?m to 10 ?m.

Abstract: A nonwoven fabric includes mixed fibers having different fiber diameters. A group of fibers having a fiber diameter of 5.0 ?m or less (fiber group A) is present at a volume fraction of 20 to 80 vol %, a group of fibers having a fiber diameter of 50.0 ?m or more (fiber group B) is present at a volume fraction of 1 to 40 vol %, and a group of fibers having a fiber diameter of more than 5.0 ?m and less than 50.0 ?m (fiber group C) is present at a volume fraction of 0 to 79 vol %. The ratio of the median fiber diameter (B?) of fiber group B to the median fiber diameter (A?) of fiber group A (B?/A?) is 35 or more.

Abstract: Provided are a polyphenylene sulfide fiber including a PPS resin as a main component and having both excellent heat resistance and excellent thermal bonding properties, and a nonwoven fabric including the fiber. The polyphenylene sulfide fiber includes polyphenylene sulfide as a main component and having the sum of the crystallinity and the rigid amorphous fraction of 30% to 90%. The crystallinity is preferably not less than 5% and less than 25%. The polyphenylene sulfide fiber is used to form a nonwoven fabric. The nonwoven fabric is preferably produced by consolidation by thermal bonding or mechanical entanglement.

Abstract: A polyphenylene sulfide composite fiber which consists primarily of component A and component B, the component A being a resin primarily containing polyphenylene sulfide made from p-phenylene sulfide as a primary unit, the component B being a resin primarily containing a copolymerized polyphenylene sulfide made from at least one kind of copolymerization unit other than p-phenylene sulfide, wherein at least one part of a fiber surface is made of component B. A thermally adhesive composite fiber and a nonwoven fabric which are made of a resin consisting primarily of polyphenylene sulfide and are excellent in heat resistance, flame retardancy and chemical resistance can be provided.

Abstract: A production method for a filament non-woven fabric includes a) obtaining filaments having a crystallization temperature not exceeding 112° C. by melting a resin containing polyethylene sulfide as a main component which is not substantially copolymerized with trichlorobenzene; b) pulling and drawing fiber threads formed by discharging the melted resin from spinning nozzles at a spinning speed of at least 5,000 m/min and less than 6,000 m/min by an ejector disposed such that a distance between a bottom face of the spinning nozzles and a compressed air emission outlet of the ejector is 450-650 mm; c) collecting obtained filaments on a moving net, forming a non-woven web; and d) thermocompression bonding the obtained non-woven web using a heating roller.

Abstract: The invention provides a leather-like sheet material which is excellent in surface appearance, texture and physical properties and considerate of the environment; a process for the production thereof; and interior, clothing, and industrial materials made by using the same. A leather-like sheet material made from a nonwoven fabric which is constituted of ultra-fine fibers having a mean single-fiber fineness of 0.001 to 0.5 dtex and impregnated with a self-emulsifiable polyurethane, wherein the self-emulsifiable polyurethane and the ultra-fine fibers do substantially not adhere closely to each other, the moieties of the polyurethane have a nonporous structure, and the polyurethane has a structure crosslinked by siloxane bond in the molecular structure.

Abstract: A support for a separation membrane includes a long-fiber nonwoven fabric composed of thermoplastic continuous filaments.