Patents Assigned to Mitsubishi Acetate Co., Ltd
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Patent number: 4888147Abstract: A process for producing a cellulose acetate molding material which comprises dissolving cellulose diacetate in a mixed solvent of acetone and water to prepare a dope and then spinning or film forming the dope, wherein at least one compound selected from the group consisting of water-soluble salts and bases is added to the water to be used in preparation of the dope.Type: GrantFiled: October 7, 1988Date of Patent: December 19, 1989Assignees: Mitsubishi Rayon Co., Ltd., Mitsubishi Acetate Co., Ltd.Inventors: Naoki Mochida, Hiroaki Sawada
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Patent number: 4826433Abstract: A stick absorber for the oral cavity comprising a bundle of fibers, the periphery of said bundle of fibers being wrapped with a water-permeable tape, and said tape being adhered at its joint with a binder. The stick absorber has high water absorbability and spacing effects, and does not release its constituent fibers into the oral cavity.Type: GrantFiled: June 16, 1987Date of Patent: May 2, 1989Assignees: Mitsubishi Acetate Co., Ltd., Uni-Charm Corp.Inventors: Takashi Sakai, Hiroshi Kitayama, Masamitu Yamamoto, Takashi Mino
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Patent number: 4670953Abstract: A method and device for forming a warp beam of uniform diameter by feedback control of winding tension, in which a signal obtained from local winding tensions, each corresponding to a tension of a yarn at a certain widthwise position, are utilized for adjusting the position and width of a reed so that distribution of the warp on the beam is improved and an intra-beam diameter difference is compensated. One of the signals obtained from the local winding tensions is utilized for adjusting the rotational speed of rollers so that an inter-beam diameter difference is compensated. Thus, a warp beam without intra- or inter-beam diameter difference can always be produced.Type: GrantFiled: September 6, 1985Date of Patent: June 9, 1987Assignees: Mitsubishi Acetate Co. Ltd., Mitsubishi Rayon Company, Ltd.Inventors: Hisashi Kanda, Susumu Nario, Kazuhiko Morifuji, Yuzo Kawada, Takashi Sakai, Takeshi Kawada, Katsura Shimada, Mitsuo Tsuneda
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Patent number: 4583560Abstract: A tobacco smoke filter includes a corrugated tape-like wrapping which, together with an outer perforated or otherwise air-permeable paper, defines a set of longitudinal grooves. Each of the grooves includes a blocking member, so as to inhibit direct smoke flow through the grooves and promote a ventilation effect. The blocking members in each groove are longitudinally staggered from one groove to the next to simplify the production of the device.Type: GrantFiled: July 7, 1983Date of Patent: April 22, 1986Assignees: Mitsubishi Acetate Co., Ltd, Japan Tobacco Inc.Inventors: Takashi Sakai, Kazuo Maeda, Masuo Kawabata, Mituo Kono
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Patent number: 4488563Abstract: A filter plug having a dual structure comprising filter element A made from a crimped long filter tow in a form of a plug, filter element B, joined to said A, prepared by wrapping a core material consisting of a long fiber tow in a sheet-formed product having grooves which is formed from a material having an air permeability of 8 liters/minute or less and an air permeable wrapping paper and/or a wrapping paper with perforated openings on its periphery which is wrapping therein said filter elements A and B so that the outer grooves parts of the sheet-formed product pass through in the longer direction of the filter plug.Type: GrantFiled: April 29, 1982Date of Patent: December 18, 1984Assignees: Mitsubishi Acetate Co., Ltd., Mitsubishi Rayon Co., Ltd.Inventors: Kazuhiko Morifuji, Hirohumi Okura, Takashi Sakai
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Patent number: 4357188Abstract: A method for manufacturing cigarette filters which have a well-stabilized shape in which acetate fibrous tows impregnated with carboxylic acid ester of polyol are formed into a predetermined shape, uniformly impregnated with water, and irradiated with microwave energy. Water is used during the application of microwave energy to enhance the absorption of microwave energy and hence heating of the filter. This causes the carboxylic acid ester of polyol to very rapidly disperse causing it to permeate into the acetate fiber to rapidly complete the stabilization and solidification of the filter.Type: GrantFiled: October 17, 1980Date of Patent: November 2, 1982Assignees: Mitsubishi Rayon Co., Ltd., Mitsubishi Acetate Co., Ltd.Inventors: Naoki Mochida, Kazuhiko Morifuji, Takashi Sakai
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Patent number: 4252855Abstract: Surface-modified cellulose acetate filaments having a microporous structure located in the peripheral surface layer thereof are prepared by bringing non-modified cellulose acetate filaments which have an average degree of acetylation of 50 to 62% into contact with an organic solvent which is capable of dissolving or swelling the non-modified filaments and by rapidly evaporating the solvent from the filaments. The microporous structure causes the surface-modified filaments to exhibit a desirable silklike touch and an increased intensity in dye exhaustion of from 1.1 to 2.0 times that of the non-modified filaments.Type: GrantFiled: December 7, 1978Date of Patent: February 24, 1981Assignees: Mitsubishi Acetate Co., Ltd, Mitsubishi Rayon Co., Ltd.Inventors: Ryohei Noguchi, Seigi Suzuki, Yutaka Maeda, Koichi Minami