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1.发明申请公开(公告)号：US20190291303A1
公开(公告)日：2019-09-26
申请号：US16431213
申请日：2019-06-04
Applicant: UNICHARM CORPORATION
Inventor： Takayoshi KONISHI , Toshio HIRAOKA , Noritomo KAMEDA , Hideaki ICHIURA , Hiroko NAKAOKA
Abstract: 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：US20200217013A1
公开(公告)日：2020-07-09
申请号：US16818166
申请日：2020-03-13
Applicant: UNICHARM CORPORATION
Inventor： Takayoshi KONISHI , Toshio HIRAOKA
Abstract: A recycled pulp that is reusable sanitary products is efficiently manufactured by recovering pulp fiber from used sanitary products containing the pulp fiber and a polymer absorbent. The method of the present invention comprises: a step applying a mechanical force to the used sanitary products in an aqueous solution containing a polyvalent metal ion or an acidic aqueous solution with a pH of 2.5 or lower and thus degrading the used sanitary products into the pulp fiber and other materials; a step separating the pulp fiber from the mixture of the pulp fiber and other materials that has been formed in the degradation step; and a step treating the pulp fiber thus separated with an ozone-containing aqueous solution with a pH of 2.5 or lower.
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公开(公告)号：US20170107667A1
公开(公告)日：2017-04-20
申请号：US15317410
申请日：2015-03-10
Applicant: UNICHARM CORPORATION
Inventor： Takayoshi KONISHI , Toshio HIRAOKA
Abstract: A recycled pulp that is reusable sanitary products is efficiently manufactured by recovering pulp fiber from used sanitary products containing the pulp fiber and a polymer absorbent. The method of the present invention comprises: a step applying a mechanical force to the used sanitary products in an aqueous solution containing a polyvalent metal ion or an acidic aqueous solution with a pH of 2.5 or lower and thus degrading the used sanitary products into the pulp fiber and other materials; a step separating the pulp fiber from the mixture of the pulp fiber and other materials that has been formed in the degradation step; and a step treating the pulp fiber thus separated with an ozone-containing aqueous solution with a pH of 2.5 or lower.
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公开(公告)号：US20190186074A1
公开(公告)日：2019-06-20
申请号：US16322109
申请日：2017-06-09
Applicant: UNICHARM CORPORATION
Inventor： Takayoshi KONISHI , Toshio HIRAOKA , Koichi YAMAKI , Noritomo KAMEDA
CPC classification number: D21C5/022 , A61L2/18 , A61L2/183 , A61L11/00 , B09B3/00 , B09B5/00 , B29B17/00 , B29B17/02 , B29B2017/0224 , B29L2031/4878 , C08J11/26 , D21B1/10 , D21C5/02 , Y02W30/62 , Y02W30/622 , Y02W30/648 , Y02W30/706
Abstract: A method is provided for recovering pulp fibers having little damage from a used absorbent article which includes a water permeable front sheet, a water impermeable back sheet and an absorbent body that contains pulp fibers and a superabsorbent polymer. At least one opening with a circle equivalent diameter of 5-45 mm, or 10-45 mm cut, is made in the front sheet and/or the back sheet of the used absorbent article, which is then agitated in an organic acid aqueous solution with a pH of less than or equal to 2.5, and the superabsorbent polymer is deactivated and the pulp fibers and superabsorbent polymer are discharged from the used absorbent article through the opening or cut.
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公开(公告)号：US20190169795A1
公开(公告)日：2019-06-06
申请号：US16321829
申请日：2017-06-09
Applicant: UNICHARM CORPORATION
Inventor： Takayoshi KONISHI , Toshio HIRAOKA , Koichi YAMAKI , Noritomo KAMEDA
Abstract: A method is provided for recovering pulp fibers having little damage from a used absorbent article that contains pulp fibers and a superabsorbent polymer. The used absorbent article is treated at a temperature of greater than or equal to 80° C. with an organic acid aqueous solution having a pH no greater than 2.5, and the superabsorbent polymer is deactivated. Preferably, the pulp fibers and the deactivated superabsorbent polymer are separated from the used absorbent article after treatment with the organic acid aqueous solution, and further, a mixture including the separated pulp fibers and deactivated superabsorbent polymer is treated with an oxidizing agent, the deactivated superabsorbent polymer is decomposed, reduced in molecular weight and solubilized.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20200238574A1
公开(公告)日：2020-07-30
申请号：US16262849
申请日：2019-01-30
Applicant: UNICHARM CORPORATION
Inventor： Takayoshi KONISHI , Toshio HIRAOKA , Noritomo KAMEDA , Hideaki ICHIURA , Hiroko NAKAOKA
Abstract: 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：US20190271018A1
公开(公告)日：2019-09-05
申请号：US16320247
申请日：2017-06-12
Applicant: UNICHARM CORPORATION
Inventor： Takayoshi KONISHI , Toshio HIRAOKA , Koichi YAMAKI , Noritomo KAMEDA
Abstract: A simple method is provided for producing a saccharified solution from a used absorbent article such as a used diaper. In order to produce a saccharified solution from a used absorbent article comprising a non-cellulosic liquid permeable surface material and an absorbent body that contains pulp fibers, the used absorbent article is immersed, without first being decomposed, in a saccharifying enzyme solution containing cellulase. The pulp fibers in the used absorbent article are saccharified by the cellulase, producing a saccharified solution. The produced saccharified solution is exuded out of the used absorbent article through the liquid permeable surface material, so it is possible to easily separate and recover the saccharified solution from the used absorbent article while maintaining the outer shape.
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公开(公告)号：US20170130400A1
公开(公告)日：2017-05-11
申请号：US15129823
申请日：2015-01-22
Applicant: Unicharm Corporation
Inventor： Takayoshi KONISHI , Toshio HIRAOKA
CPC classification number: D21H27/005 , A47K7/03 , A47K2010/3266 , D21H27/002 , D21H27/004 , D21H27/30 , D21H27/38
Abstract: The purpose of the present disclosure is to provide a wet wipe which achieves both wet-strength and water-dissolvability. The wet wipe comprises the following configuration. This water-dissolving wet wipe comprises a multi-layer sheet provided with a first sheet and a second sheet, said wet wipe being characterized in that: the first sheet comprises a first hydrophilic fiber-containing layer and a first hydrophobic fiber-containing layer, and the second sheet comprises a second hydrophilic fiber-containing layer and a second hydrophobic fiber-containing layer; the multi-layer sheet has a plurality of junction parts at predetermined intervals; the plurality of junction parts occupy 0.5% to 12.0% of the surface area; the first sheet and the second sheet each have a separability of less than or equal to 100 seconds; the multi-layer sheet has a bending resistance of less than or equal to 150 mm; and the wet wipe has a tensile strength of greater than or equal to 1.0 N/25 mm.
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公开(公告)号：US20170114503A1
公开(公告)日：2017-04-27
申请号：US15129420
申请日：2015-01-19
Applicant: UNICHARM CORPORATION
Inventor： Takayoshi KONISHI , Toshio HIRAOKA
CPC classification number: D21H27/32 , A47K2010/3266 , A61K8/0208 , A61Q19/00 , A61Q19/10 , D21H27/002 , D21H27/005 , D21H27/30
Abstract: A water-dissolving wet wipe includes a multi-layer sheet with first and second sheets each having hydrophilic fibers and hydrophobic fibers. The multi-layer sheet has junction parts. Intervals between the junction parts are greater than or equal to 0.6 times the average fiber length of the hydrophobic fibers of the first sheet and greater than or equal to 0.6 times the average fiber length of the hydrophobic fibers of the second sheet. The junction parts occupy 0.5% to 12.0% of the surface area of the multi-layer sheet. Each of the first and second sheets when separated from the multi-layer sheet has, in a separability test, has a separability of less than or equal to 100 seconds. The multi-layer sheet has a bending resistance of less than or equal to 150 mm. The wet wipe has a tensile strength of greater than or equal to 1.0 N per width of 25 mm.
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公开(公告)号：US20200173104A1
公开(公告)日：2020-06-04
申请号：US16785922
申请日：2020-02-10
Applicant: UNICHARM CORPORATION
Inventor： Takayoshi KONISHI , Toshio HIRAOKA
Abstract: A recycled pulp that is reusable sanitary products is efficiently manufactured by recovering pulp fiber from used sanitary products containing the pulp fiber and a polymer absorbent. The method of the present invention comprises: a step applying a mechanical force to the used sanitary products in an aqueous solution containing a polyvalent metal ion or an acidic aqueous solution with a pH of 2.5 or lower and thus degrading the used sanitary products into the pulp fiber and other materials; a step separating the pulp fiber from the mixture of the pulp fiber and other materials that has been formed in the degradation step; and a step treating the pulp fiber thus separated with an ozone-containing aqueous solution with a pH of 2.5 or lower.
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