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1.发明申请公开(公告)号：US20210214587A1
公开(公告)日：2021-07-15
申请号：US16967504
申请日：2019-01-28
Applicant: Nitto Denko Corporation
Inventor： Naofumi KOSAKA , Yosuke SHIMIZU , Satoshi HONDA , Taiki SHIMOKURI , Shou TAKARADA , Masayuki SATAKE , Kenichi OKADA , Atsushi TAKASHIMA , Ginji MIZUHARA , Masayuki OKAMOTO , Ryoko ASAI
IPC: C09J7/38 , C09J11/08 , C09J11/06 , C09J133/08 , B32B27/30 , B32B27/18 , B32B7/06 , B32B37/12 , B32B37/18 , B32B38/10
Abstract: Provided is a PSA sheet having a PSA layer. The PSA layer includes a layer A forming at least one surface thereof. The PSA sheet has an adhesive strength N0 of 2.0 N/10 mm or greater, after one day at room temperature following application of the layer A side to a surface of an alkaline float glass plate as an adherend having a contact angle of 5°-10° with distilled water; has an N1 to N0 reduction rate of 30% or lower, wherein N1 is a water-resistant adhesive strength measured after stored at room temperature for one day, immersed in water for 30 minutes, taken out from the water and then residual water is wiped off; and has an N2 to N0 reduction rate of 40% or higher, wherein N2 is a water-peel strength measured after stored at room temperature for one day, 20 μL distilled water is dropped onto the adherend and is allowed to enter a PSA layer/adherend interfacial edge. N2 is measured at a tensile speed of 300 mm/min at a peel angle of 180°.
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2.发明申请公开(公告)号：US20240368435A1
公开(公告)日：2024-11-07
申请号：US18773082
申请日：2024-07-15
Applicant: NITTO DENKO CORPORATION
Inventor： Naofumi KOSAKA , Yosuke SHIMIZU , Satoshi HONDA , Taiki SHIMOKURI , Shou TAKARADA , Masayuki SATAKE , Kenichi OKADA , Atsushi TAKASHIMA , Ginji MIZUHARA , Masayuki OKAMOTO , Ryoko ASAI
IPC: C09J7/38 , B32B7/06 , B32B27/18 , B32B27/30 , B32B37/12 , B32B37/18 , B32B38/10 , C09J11/06 , C09J11/08 , C09J133/08
Abstract: Provided is a PSA sheet having a PSA layer. The PSA layer includes a layer A forming at least one surface thereof. The PSA sheet has an adhesive strength N0 of 2.0 N/10 mm or greater, after one day at room temperature following application of the layer A side to a surface of an alkaline float glass plate as an adherend having a contact angle of 5°-10° with distilled water; has an N1 to N0 reduction rate of 30% or lower, wherein N1 is a water-resistant adhesive strength measured after stored at room temperature for one day, immersed in water for 30 minutes, taken out from the water and then residual water is wiped off, and has an N2 to N0 reduction rate of 40% or higher, wherein N2 is a water-peel strength measured after stored at room temperature for one day, 20 μL distilled water is dropped onto the adherend and is allowed to enter a PSA layer/adherend interfacial edge. N2 is measured at a tensile speed of 300 mm/min at a peel angle of 180°.
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3.发明公开公开(公告)号：US20240217208A1
公开(公告)日：2024-07-04
申请号：US18610364
申请日：2024-03-20
Applicant: NITTO DENKO CORPORATION
Inventor： Kaori AKAMATSU , Kaori MIZOBATA , Ryo AWANE , Akira HIRAO , Junji YOKOYAMA , Yosuke SHIMIZU
CPC classification number: B32B7/06 , B32B3/04 , B32B7/12 , B32B27/308 , B32B27/36 , B32B43/006 , B32B2307/202 , B32B2405/00 , Y10T428/24752
Abstract: The present invention provides an electrical debonding type adhesive sheet capable of producing a joined body in which a voltage can be stably applied to an electrical debonding type adhesive layer. An electrical debonding type adhesive sheet according to a first embodiment of the present invention includes a first adhesive layer, a substrate for voltage application including an electroconductive layer and a base layer, and a second adhesive layer in this order, and has a first protrudent part, in which the first adhesive layer and the substrate for voltage application extend and protrude with respect to the second adhesive layer, and a second protrudent part, in which the substrate for voltage application extends from the first protrudent part and protrudes with respect to the first adhesive layer.
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4.发明公开公开(公告)号：US20230256710A1
公开(公告)日：2023-08-17
申请号：US18178670
申请日：2023-03-06
Applicant: NITTO DENKO CORPORATION
Inventor： Kaori AKAMATSU , Kaori MIZOBATA , Ryo AWANE , Akira HIRAO , Junji YOKOYAMA , Yosuke SHIMIZU
CPC classification number: B32B7/06 , B32B3/04 , B32B7/12 , B32B27/308 , B32B27/36 , B32B43/006 , B32B2307/202 , B32B2405/00 , Y10T428/24752
Abstract: The present invention provides an electrical debonding type adhesive sheet capable of producing a joined body in which a voltage can be stably applied to an electrical debonding type adhesive layer. An electrical debonding type adhesive sheet according to a first embodiment of the present invention includes a first adhesive layer, a substrate for voltage application including an electroconductive layer and a base layer, and a second adhesive layer in this order, and has a first protrudent part, in which the first adhesive layer and the substrate for voltage application extend and protrude with respect to the second adhesive layer, and a second protrudent part, in which the substrate for voltage application extends from the first protrudent part and protrudes with respect to the first adhesive layer.
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公开(公告)号：US20210230455A1
公开(公告)日：2021-07-29
申请号：US16967517
申请日：2019-01-28
Applicant: Nitto Denko Corporation
Inventor： Naofumi KOSAKA , Yosuke SHIMIZU , Satoshi HONDA , Taiki SHIMOKURI , Shou TAKARADA , Masayuki SATAKE , Kenichi OKADA , Atsushi TAKASHIMA , Ginji MIZUHARA
Abstract: Provided is a method for peeling a PSA sheet adhered on a polarizing plate. The PSA sheet has a PSA layer. The PSA layer includes a layer A forming at least one surface of the PSA layer. Of the polarizing plate, the surface to which the PSA sheet is adhered is corona-treated or plasma-treated. The peeling method includes a water-peel step in which the PSA sheet is peeled from the polarizing plate, in a state where an aqueous liquid exits at the interface between the polarizing plate and the PSA sheet at the front line of peeling the PSA sheet from the polarizing plate, with the aqueous liquid allowed to further enter the interface following the movement of the peel front line.
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Patent Agency Ranking
公开(公告)号：US20240132757A1
公开(公告)日：2024-04-25
申请号：US18275947
申请日：2022-02-03
Applicant: NITTO DENKO CORPORATION
Inventor： Yosuke SHIMIZU , Sayaka YAMASHITA , Kyotaro YAMADA , Masatoshi KATO
IPC: C09J11/04 , C09J7/38 , C09J133/08 , G01N31/22
CPC classification number: C09J11/04 , C09J7/385 , C09J133/08 , G01N31/222 , C09J2301/302 , C09J2301/408 , C09J2301/50
Abstract: The present invention relates to a pressure-sensitive adhesive composition including a base polymer and a material that is discolored by water or water vapor, a pressure-sensitive adhesive sheet including a pressure-sensitive adhesive layer containing the pressure-sensitive adhesive composition, a method for producing the pressure-sensitive adhesive composition, and a method for attaching the pressure-sensitive adhesive sheet to an adherend and detecting presence of the water or the water vapor in the attached location.
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公开(公告)号：US20230144464A1
公开(公告)日：2023-05-11
申请号：US17802756
申请日：2021-02-24
Applicant: NITTO DENKO CORPORATION
Inventor： Yosuke SHIMIZU , Naofumi KOSAKA , Ryoko ASAI , Kenta KUMAKURA
IPC: C09J133/08 , C09J11/06 , C08F220/18 , C08F220/20 , C08F226/10 , C08F2/48
CPC classification number: C09J133/08 , C08F2/48 , C08F220/20 , C08F220/1804 , C08F220/1806 , C08F226/10 , C09J11/06 , C09J2301/124 , C09J2301/302 , C09J2301/416 , C09J2301/502 , C09J2433/001
Abstract: Provided is a PSA sheet that can combine bonding reliability and peeling removability, and further can be peeled off without causing deformation or damage to the adherend in various peeling modes. The PSA sheet provided by this invention has a PSA layer. The PSA sheet has a water-peel strength of 2 N/10 mm or less. The PSA sheet further has a stress at 100 % elongation of less than 30 MPa as well as a multiplication product (σf-εf) of fracture stress σf (MPa) and fracture strain εf (%) of 250 or greater.
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公开(公告)号：US20220275250A1
公开(公告)日：2022-09-01
申请号：US17632261
申请日：2020-07-28
Applicant: NITTO DENKO CORPORATION
Inventor： Ryoko ASAI , Naofumi KOSAKA , Yosuke SHIMIZU
IPC: C09J7/38 , C09J201/06 , C09J11/06
Abstract: Provided is a photo-crosslinkable PSA comprising a polymer having side-chain benzophenone structures. The photo-crosslinkable PSA is a cured product of a PSA composition comprising an ethylenically unsaturated compound and a benzophenone structure-containing component. The photo-crosslinkable PSA has VOC emissions of 500 μg/g or less. Also provided is a PSA sheet having a PSA layer formed from the photo-crosslinkable PSA.
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公开(公告)号：US20230312990A1
公开(公告)日：2023-10-05
申请号：US18040474
申请日：2021-07-13
Applicant: NITTO DENKO CORPORATION
Inventor： Naofumi KOSAKA , Yosuke SHIMIZU , Kenta KUMAKURA
IPC: C09J7/38
CPC classification number: C09J7/38 , C09J2203/318 , C09J2301/302 , C09J2301/416 , C09J2301/502 , C09J2301/312 , C09J2400/143
Abstract: To provide a separation method for a joined object for display device, by which PSA can be peeled off even when the PSA is tightly bonded to a member in the joined object. Provided is a method for separating a joined object for display device. In this method, the joined object comprises two members joined with a PSA comprising a hydrophilicity enhancer. The method comprises a step of peeling the PSA from the member by supplying steam towards the PSA.
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公开(公告)号：US20220275254A1
公开(公告)日：2022-09-01
申请号：US17632192
申请日：2020-07-28
Applicant: NITTO DENKO CORPORATION
Inventor： Ryoko ASAI , Naofumi KOSAKA , Yosuke SHIMIZU
Abstract: Provided is a PSA sheet having a PSA layer. The PSA layer has a multilayer structure comprising a layer A forming one face of the PSA layer and a layer B placed on the backside of the layer A. The layer B is a photo-crosslinkable PSA layer comprising a photo-crosslinkable polymer.
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