Toray Industries, Inc.

Yoshikazu Yakake

Yohei Nakano

Toru Arakane

Masaru Ueno

Yuji Iyama

Teruhisa Sato

Ryoichi Hane

Akito Kuroda

Makoto Nishimura

Hiroyuki Matsuura

Motonori Hochi

Gen Koide

Takuji Kobayashi

Yuki Sekido

Masaki Higashi

Ai Suzuki

Masashi Ito

Jun Ogihara

Tatsuya Kajino

Naoki Shibusawa

Nobuhiro Maeda

Youhei Nakano

Daiki Shimada

Hitoshi Yamasaki

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.

Laminate and production method therefor

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.

Multilayer sheet, integrated sheet using same, and manufacturing method therefor

A melt-blown nonwoven fabric includes a fiber containing a thermoplastic resin, wherein apparent density is 0.1 to 0.4 g/cmand KES surface roughness of at least one surface of the fabric sheet is up to 1.2 &#x3bc;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 &#x2212;3&#xb0; 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.

Melt-blown nonwoven fabric and method of manufacturing same

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 &#x3bc;m to 100 &#x3bc;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 &#x3bc;m to 10 &#x3bc;m.

Mixed-fiber nonwoven fabric, laminated sheet and filter, and process for producing mixed-fiber nonwoven fabric

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.

Method for producing long fiber nonwoven fabric

A nonwoven fabric includes mixed fibers having different fiber diameters. A group of fibers having a fiber diameter of 5.0 &#x3bc;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 &#x3bc;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 &#x3bc;m and less than 50.0 &#x3bc;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&#x2032;) of fiber group A (B&#x2032;/A&#x2032;) is 35 or more.

Mixed-fiber nonwoven fabric and filter medium using the same

A production method for a filament non-woven fabric includes a) obtaining filaments having a crystallization temperature not exceeding 112&#xb0; 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.

Production method for filament non-woven fabric

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.

Leather-like sheet material, process for production thereof, and interior, clothing and industrial materials made by using the same

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

Support for separation membrane, and method for production thereof

A sheet comprising a non-woven fabric in which ultra-fine fibers of a single fiber thickness of 0.5 dtex or less are entangled and an elastomeric binder mainly composed of a polyurethane, wherein the polyurethane is a polycarbonate-based polyurethane having a polycarbonate skeleton represented by both of the following general formulas (1) and (2), and having a gelation point of 2.5 ml or more and less than 6 ml.  Rand Rare aliphatic hydrocarbon groups with 7 to 11 carbons, and they may be same or different, n and m are positive integers, and when Rand Rare different, it is a block copolymer or a random copolymer.  Rand Rare aliphatic hydrocarbon groups with 3 to 6 carbons, and they may be same or different, x and y are positive integers, and when Rand Rare different, it is a block copolymer or a random copolymer.

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Otsu, Japan

Yoshikazu Yakake