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公开(公告)号：US11885070B2
公开(公告)日：2024-01-30
申请号：US17658457
申请日：2022-04-08
申请人： ICHIKAWA CO., LTD.
发明人： Yuya Takamori , Taichi Sakai
CPC分类号： D21F7/08 , C08L75/04 , D21F2/00 , D21F3/029 , C08L2312/00
摘要： A papermaking belt in which changes in surface properties of the resin layer upon use is suppressed, and a method for making the papermaking belt. Provided is a papermaking belt for use in a papermaking machine, including at least one resin layer including a resin, wherein the surface roughness after contacting the surface of the resin layer with a metal plate having a surface roughness equal to or less than 0.10 μm at a pressure of 100±3 kg/cm2 for 20 hours in warm water bathing at 70±5° C. is equal to or higher than 40% relative to the surface roughness of the surface of the resin layer in a wet state before the contact.
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公开(公告)号：US11718958B2
公开(公告)日：2023-08-08
申请号：US17178328
申请日：2021-02-18
申请人： Ichikawa Co., Ltd.
发明人： Yuya Takamori , Manami Morinaga
CPC分类号： D21F3/0236 , C08G18/10 , C08G18/44 , C08G18/4854 , C08G64/305 , C08K5/0025 , C08K5/053 , D21F3/086
摘要： The object of the invention is to provide a shoe press belt which has an excellent strength while the variation in strength among its parts being suppressed, and to provide a method for producing such a shoe press belt.
Provided is a shoe press belt for use in a papermaking machine comprising at least one resin layer, wherein the resin layer comprises a polyurethane resin formed by curing an urethane prepolymer having an isocyanate group with a curing agent having an active hydrogen group, wherein the curing agent comprises one or more polycarbonate diol(s) expressed by the following formulae (1) and (2).
HO-Am-Bn—R1OH (1)-
公开(公告)号：US10036120B2
公开(公告)日：2018-07-31
申请号：US15415101
申请日：2017-01-25
申请人： Ichikawa Co., Ltd.
发明人： Yuya Takamori , Nobuharu Suzuki , Mitsuyoshi Matsuno , Chie Umehara , Yuji Mizoguchi , Taichi Sakai
CPC分类号： D21F3/0227 , C08G18/10 , C08G18/44 , C08G18/4858
摘要： There is provided a shoe press belt for a papermaking machine, comprising one or more resin layers. At least a part of the resin layers comprises a polyurethane resin comprising polymeric MIDI as an ingredient. The polyurethane resin may be a resin obtainable by reacting one or more curing agent(s) having an active hydrogen group, polymeric MDI and one or more urethane prepolymer(s) having a terminal isocyanate group, the urethane prepolymer(s) being obtainable by reacting one or more isocyanate compound(s) with one or more polyol(s).
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公开(公告)号：US11686045B2
公开(公告)日：2023-06-27
申请号：US17178322
申请日：2021-02-18
申请人： Ichikawa Co., Ltd.
发明人： Yuya Takamori , Manami Morinaga
IPC分类号： D21F3/02 , C08G18/10 , C08G18/44 , C08G18/48 , C08G64/30 , C08K5/00 , C08K5/053 , C08K5/17 , D21F3/08
CPC分类号： D21F3/0236 , C08G18/10 , C08G18/44 , C08G18/4854 , C08G64/305 , C08K5/0025 , C08K5/053 , C08K5/17 , D21F3/086
摘要： The object of the invention is to provide a shoe press belt which has an excellent strength while the variation in strength among its parts being suppressed, and to provide a method for producing such a shoe press belt.
Provided is a shoe press belt for use in a papermaking machine comprising at least one resin layer comprising polyurethane resin, wherein the polyurethane resin comprises as a component a polycarbonate diol comprising one or more unit(s) A expressed by the following formula (1) (wherein R1 is a branched alkylene group having 3 or more and 20 or less of carbon atoms):-
公开(公告)号：US10196777B2
公开(公告)日：2019-02-05
申请号：US14990362
申请日：2016-01-07
申请人： Ichikawa Co., Ltd.
发明人： Chie Umehara , Shintaro Yamazaki , Yuya Takamori
摘要： A shoe press belt with excellent mechanical properties, in particular excellent wear resistance is provided, and a method of manufacturing the shoe press belt for use in a papermaking machine is also provided. The belt is constituted by a resin layer and includes an outer circumferential layer surface contacting a felt. The outer circumferential layer surface is formed with a surface-treated layer, in which part of the resin layer is modified by coating a composition including an isocyanate compound onto a semi-finished outer circumferential layer and by performing a curing treatment.
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公开(公告)号：US09777433B2
公开(公告)日：2017-10-03
申请号：US15170107
申请日：2016-06-01
申请人： Ichikawa Co., Ltd.
IPC分类号： D21F3/02
CPC分类号： D21F3/029 , D21F3/0227 , D21F3/0236
摘要： A shoe press belt with excellent mechanical properties, in particular a shoe press belt with excellent crack resistance and excellent resistance to land edge deficiency. The shoe press belt includes a felt-side resin layer containing a resin formed by curing a prepolymer having a terminal isocyanate group (—NCO) with a curing agent, wherein the prepolymer contains, in reacted form, a compound comprising 1,4-bis(isocyanate methyl) cyclohexane and a polycarbonate diol, and wherein the felt-side resin layer has grooves that are configured to receive water squeezed from a felt.
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公开(公告)号：US12012696B2
公开(公告)日：2024-06-18
申请号：US17815446
申请日：2022-07-27
申请人： ICHIKAWA CO., LTD.
发明人： Yuya Takamori , Manami Morinaga
CPC分类号： D21F3/0236 , C08G18/10 , C08G18/3221 , D21F7/083
摘要： Provided are a papermaking device having an excellent strength in which the unevenness in strength between its parts is suppressed, and a method for producing the papermaking device.
Also provided is a papermaking device for use in papermaking machine, the papermaking device comprising at least one resin layer comprising a polyurethane resin, wherein the polyurethane resin comprises as a component a polyether polycarbonate diol comprising one or more unit(s) A expressed by the following formula (1).-
公开(公告)号：US11987933B2
公开(公告)日：2024-05-21
申请号：US17815431
申请日：2022-07-27
申请人： ICHIKAWA CO., LTD.
发明人： Yuya Takamori , Manami Morinaga
CPC分类号： D21F3/0236 , C08G18/3221 , D21F7/083 , C08G18/10
摘要： A papermaking device may have excellent strength and suppressed unevenness in strength between its parts. Such a papermaking device may be used in papermaking machine and may include at least one resin layer comprising polyurethane resin. The polyurethane resin may be obtained by reacting a urethane prepolymer having an isocyanate group with a curing agent having an active hydrogen group. The urethane prepolymer may be obtained by reacting a polyisocyanate compound including 2,4-tolylene-diisocyanate and/or 2,6-tolylene-diisocyanate with a polyol compound including one or more polyether polycarbonate diol(s).
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公开(公告)号：US11603628B2
公开(公告)日：2023-03-14
申请号：US17178389
申请日：2021-02-18
申请人： Ichikawa Co., Ltd.
发明人： Yuya Takamori , Manami Morinaga
摘要： A shoe press belt for use in a papermaking machine including at least one resin layer, where the resin layer contains a polyurethane resin formed by curing an urethane prepolymer having an isocyanate group with a curing agent having an active hydrogen group, where the urethane prepolymer is obtained by reacting a polyisocyanate compound containing 4,4′-methylene bis(phenylisocyanate) with a polyol compound containing polytetramethylene ether glycol, and the curing agent contains polycarbonate diol(s).
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公开(公告)号：US09732470B2
公开(公告)日：2017-08-15
申请号：US14897175
申请日：2014-06-13
申请人： ICHIKAWA CO., LTD.
IPC分类号： D21F3/02
CPC分类号： D21F3/0227
摘要： The purpose of the present invention is to provide a shoe press belt which exhibits improvement in mechanical characteristics such as crack resistance, wear resistance, delamination resistance and bending fatigue resistance, particularly in the surface wear resistance of the shoe press belt and the crack resistance of the bottom regions of water receiving parts. A shoe press belt which is produced by integrating a reinforcing substrate with a polyurethane layer including at least a felt-side layer and in which water-receiving parts are formed in the felt-side layer, wherein the polyurethane equivalent value of the second resin layer including the bottom regions of the water-receiving parts is adjusted so as to be larger than that of the first resin layer including a surface which is to be brought into contact with a felt.
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