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公开(公告)号：US11987932B2
公开(公告)日：2024-05-21
申请号：US18153410
申请日：2023-01-12
申请人： Unicharm Corporation
CPC分类号： D21C5/022 , A61L2/183 , A61L11/00 , B09B3/0075 , B09B3/80 , B29B17/02 , D21H11/14 , B29B2017/0293 , B29L2031/4878
摘要： The purpose of the present invention is to provide a method which is for producing pulp fibers for cellulose nanofiberization from pulp fibers of used sanitary products, and which can produce pulp fibers for cellulose nanofiberization that have low lignin content and a low distribution thereof and that have excellent cellulose nanofiberization properties. This method is described below. The method is characterized by involving: a step for supplying, from a mixed solution supply port (32) to a treatment tank (31), a mixed solution (51) which contains superabsorbent polymers and pulp fibers derived from used sanitary products; a step for supplying an ozone-containing gas (53) from an ozone-containing gas supply port (43) to a treatment solution (52) inside of the treatment tank (31); a step in which, by raising the ozone-containing gas (53) while lowering the superabsorbent polymers and pulp fibers in the treatment tank (31), the ozone-containing gas (53) is brought into contact with the superabsorbent polymers and the pulp fibers, and pulp fibers for cellulose nanofiberization are formed from the pulp fibers; and a step for discharging the treatment solution (52) from a treatment solution discharge port (33), wherein the pulp fibers for cellulose nanofiberization have a lignin content of less than or equal to 0.1 mass %.
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公开(公告)号：US11673172B2
公开(公告)日：2023-06-13
申请号：US16760107
申请日：2018-07-26
申请人： Unicharm Corporation
摘要： Provided is a method that, when pulp fibers are recovered from used absorbent articles that have been put into collection bags, makes it possible to safely and sanitarily crush the used absorbent articles while suppressing costs. A method for recovering pulp fibers from used absorbent articles, the method comprising: a crushing step (S12) in which collection bags (A) in which used absorbent articles have been sealed are put into a container (65), the collection bags in the container are transferred to a crushing device (12) that communicates with the container, and, bag by bag, the crushing device crushes the used absorbent articles in the collections bags in a deactivating aqueous solution; and a separation step (S13) in which the pulp fibers, a highly water-absorbent polymer, and the deactivating aqueous solution are separated from the crushed product and deactivating aqueous solution obtained in the crushing step.
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公开(公告)号：US11358123B2
公开(公告)日：2022-06-14
申请号：US17527451
申请日：2021-11-16
申请人： UNICHARM CORPORATION
摘要： A method of recycling superabsorbent polymers derived from a used absorbent article, the method including: treating the superabsorbent polymers with ozone water after inactivation; reactivating, with an alkaline aqueous solution, the superabsorbent polymers treated with the ozone water; and adding hydrophilic fine particles to the superabsorbent polymers reactivated with the alkaline aqueous solution and then drying the superabsorbent polymers.
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公开(公告)号：US10895039B2
公开(公告)日：2021-01-19
申请号：US16354046
申请日：2019-03-14
申请人： UNICHARM CORPORATION
摘要： Provided is a process for recovering pulp fiber from used sanitary goods which contain both pulp fiber and a superabsorbent polymer and producing a recycled pulp which contains little ash and which is reusable for sanitary goods. This process comprises: a calcium treatment step for treating used sanitary goods with a water-soluble calcium compound and thereby conducting the dehydration of a superabsorbent polymer contained in the used sanitary goods; a disintegration step for applying a physical force to the used sanitary goods to disintegrate the used sanitary goods into pulp fiber and other materials; a separation step for separating the pulp fiber from a pulp fiber/other materials mixture which has been formed in the disintegration step; a disinfecting step using a disinfectant; and a citric acid treatment step for subjecting the separated pulp fiber to treatment with an aqueous citric acid solution at an acidic pH.
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公开(公告)号：US20200378066A1
公开(公告)日：2020-12-03
申请号：US16772235
申请日：2017-12-20
申请人： Unicharm Corporation
摘要： The present invention provides a method which, in the process of manufacturing recycled pulp fibers from a mixture of pulp fibers and a high water-absorption polymer, enables efficient manufacturing of the recycled pulp fibers while properly removing the high water-absorption polymer from the pulp fibers. This method comprises: a supply step (S19-2a) for supplying an aqueous solution containing a mixture (98) to a driving fluid supply port (DI) of an ejector (107) and simultaneously supplying, to a suction fluid supply port (AI) of the ejector, a gaseous substance (Z2) which is capable of degrading a high water-absorption polymer so as to make the degraded polymer dissolvable; and a treatment step (S19-2b) for discharging, from a mixed fluid discharge port (CO) of the ejector that is connected to a lower part of a treatment tank (105), a mixed liquid, which is formed when the aqueous solution and the gaseous substance are mixed within the ejector, into a treatment liquid (P2) within the treatment tank, so as to lessen the high water-absorption polymer in the mixture.
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公开(公告)号：US20200149220A1
公开(公告)日：2020-05-14
申请号：US16625947
申请日：2018-05-10
申请人： Unicharm Corporation
摘要： In this method of producing recycled fibers by removing superabsorbent polymers from fibers containing superabsorbent polymers, recycled fibers are efficiently produced while the superabsorbent polymers are suitably removed from the fibers. This method produces recycled fibers from a mixture of fibers and superabsorbent polymers. This method involves a continuous treatment step (S36) in which, in a treatment tank (31) having a treatment solution that can dissolve superabsorbent polymers, superabsorbent polymers are dissolved while a mixed solution (51) that contains water and fibers containing superabsorbent polymers is continuously supplied at a first flow rate, and the treatment solution (52) containing the removed fibers is continuously discharged to outside of the treatment tank at a second flow rate.
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7.发明授权公开(公告)号：US10260199B2
公开(公告)日：2019-04-16
申请号：US15512443
申请日：2015-08-07
申请人： UNICHARM CORPORATION
IPC分类号： D21C5/02 , A61L2/18 , A61L11/00 , B09B3/00 , B09B5/00 , B29B17/02 , B29B17/04 , C08J11/10 , C08J11/16 , D21B1/32
摘要： Pulp fiber containing little ash is effectively recovered from a used sanitary product containing the pulp fiber and a polymer absorbent. The method according to the present invention comprises: a step for treating the used sanitary product with an ozone-containing gas and thus decomposing and removing at least a portion of the polymer absorbent in the used sanitary product; and a step for stirring the used sanitary product, that has been treated with the ozone-containing gas, in water or an aqueous solution containing an antiseptic and thus decomposing the used sanitary product into constituents. If required, the method may further comprise a step for separating the pulp fiber from the decomposition product obtained by the decomposition step.
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公开(公告)号：US09777131B2
公开(公告)日：2017-10-03
申请号：US14386910
申请日：2013-03-22
发明人： Naoyuki Funamizu , Ken Ushijima , Nowaki Hijikata , Hiroki Yoshikawa , Takayoshi Konishi , Toru Oba
CPC分类号： C08J11/06 , B01J20/3425 , B01J20/3475 , B01J2220/68 , B09B3/00 , B29B17/00 , B29L2031/4878 , C08J2300/00 , Y02W30/62
摘要： A method enabling a used superabsorbent polymer recovered from used absorbent, etc., to be readily and inexpensively recovered without using acids or alkalies. The used superabsorbent polymer is treated with an aqueous solution of a multivalent metal salt such as calcium chloride, etc., the superabsorbent polymer treated with the aqueous solution of a multivalent metal salt is treated with an aqueous solution of an alkali metal salt such as sodium chloride, etc., the superabsorbent polymer treated with the aqueous solution of an alkali metal salt is washed with water, and the superabsorbent polymer washed with water is then dried.
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9.发明申请METHOD FOR PRODUCING FUNCTIONAL MATERIAL, FUNCTIONAL MATERIAL, SHEET-LIKE STRUCTURE AND SANITARY PRODUCT 有权功能材料，功能材料，类似结构和卫生用品的生产方法公开(公告)号：US20130330990A1
公开(公告)日：2013-12-12
申请号：US13862779
申请日：2013-04-15
申请人： UNICHARM CORPORATION
发明人： Hideaki ICHIURA , Masaaki MORIKAWA , Masaki TAKAHASHI , Noriyoshi NISHIDA , Takamitsu IGAUE , Takayoshi Konishi
CPC分类号： B01J20/28038 , A61F13/8405 , A61L15/00 , B05D1/36 , B05D3/0254 , B05D7/02 , D06M11/00 , D06M15/13 , D06M2101/20 , Y10T442/20
摘要： Provided is a method for producing a functional material, including the steps of: bringing a polyvalent metal cation aqueous solution into contact with a base material; bringing a polyanion aqueous solution containing a functional component into contact with the base material previously in contact with the polyvalent metal cation aqueous solution to bond the polyvalent metal cations and the polyanions to each other, and thereby forming an insoluble compound containing the functional component; and drying the base material including the insoluble compound.
摘要翻译： 本发明提供功能材料的制造方法，其特征在于，包括以下工序：使多价金属阳离子水溶液与基材接触; 使含有功能性成分的聚阴离子水溶液与先前与多价金属阳离子水溶液接触的基材接触，使多价金属阳离子和聚阴离子彼此结合，由此形成含有功能成分的不溶性化合物; 并干燥包括不溶性化合物的基材。
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公开(公告)号：US20240050290A1
公开(公告)日：2024-02-15
申请号：US18460231
申请日：2023-09-01
申请人： Unicharm Corporation
CPC分类号： A61F13/53 , A61F13/49 , D21C5/022 , A61F13/511
摘要： The purpose of the present invention is to provide a method for producing recycled pulp fibers such that articles using the recycled pulp fibers can easily achieve a uniform whiteness and users are not prone to feel psychological resistance to articles using the recycled pulp fibers. This method is described below. The method is characterized by involving: a step for supplying, from a mixed solution supply port (32) to a treatment tank (31), a mixed solution (51) which contains superabsorbent polymers and pulp fibers derived from multiple types of used sanitary products; a step for supplying an ozone-containing gas (53) from an ozone-containing gas supply port (43) to a treatment solution (52) inside of the treatment tank (31); a step in which, by raising the ozone-containing gas (53) while lowering the superabsorbent polymers and pulp fibers in the treatment tank (31), the ozone-containing gas (53) is brought into contact with the superabsorbent polymers and the pulp fibers, and the pulp fibers are bleached to form recycled pulp fibers; and a step for discharging the treatment solution (52) from a treatment solution discharge port (33), wherein the recycled pulp fibers have a 0-10 ΔYI with respect to a standard white plate.
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