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公开(公告)号：US11236254B2
公开(公告)日：2022-02-01
申请号：US16343351
申请日：2017-10-17
发明人： Naofumi Kosaka , Keisuke Shimokita , Hironao Ootake , Asami Doi , Mizuho Chiba , Akiko Takahashi
IPC分类号： C09J7/40 , B32B5/18 , B32B27/28 , B32B27/34 , B32B27/32 , C09J7/20 , C09J7/38 , C09J201/04 , B32B27/36 , B32B27/00 , C09J201/00
摘要： A separator containing a substrate and a release layer formed on at least one side of the substrate wherein the separator shows a strain of not more than 7% when a load of 5N/20 mm is applied for one minute in the pulling direction, and when the substrate is cut in half in the thickness direction to divide the separator into two, an apparent elastic modulus in the pulling direction of one of the divided separators is larger than an apparent elastic modulus in the pulling direction of the other divided separator.
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公开(公告)号：US11795350B2
公开(公告)日：2023-10-24
申请号：US17262584
申请日：2019-07-29
发明人： Masayuki Okamoto , Naofumi Kosaka , Satoshi Honda , Yosuke Shimizu , Ryoko Asai
CPC分类号： C09J7/385 , C09J7/10 , C09J2301/302 , C09J2301/408 , C09J2433/00
摘要： Provided is an optical PSA composition that can be easily peeled using an aqueous liquid such as water and has sufficient adhesive strength. An optical PSA composition comprising an acrylic polymer is provided. The PSA composition comprises at least one species of compound A selected among surfactants and compounds having polyoxyalkylene backbones. The monomers forming the acrylic polymer comprises less than 20 wt % alkoxyalkyl (meth)acrylate and less than 20 wt % alkoxypolyalkylene glycol (meth)acrylate. Alternatively, the compound A content is less than 1 part by weight to 100 parts by weight of the acrylic polymer.
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公开(公告)号：US10570320B2
公开(公告)日：2020-02-25
申请号：US15551062
申请日：2016-03-07
发明人： Kensuke Tani , Mizuho Nagata , Kaori Mizobata , Masatsugu Soga , Ryota Masuda , Masayuki Satake , Kenichi Okada , Naofumi Kosaka , Keisuke Shimokita
摘要： Provided is an adhesive member to be adhesively fixed through pressure which has both position adjustability and adhesiveness and is capable of producing a sufficient adhesive strength in addition to the position adjustability. The adhesive member comprises a support, a pressure-sensitive adhesive layer provided on one surface of the support, and a plurality of protrusion elements arranged, in spaced-apart relation to each other, on a principal surface of the pressure-sensitive adhesive layer on a side opposite to the support. Each of the protrusion elements is composed of an aggregation of a plurality of cohesive particles, wherein the adhesive member has a frictional force of 0.4 N/cm2 or less, with respect to a stainless steel plate serving as an adherend, as measured when the protrusion elements are in contact with a surface of the adherend, and a shear adhesive strength of 45 N/cm2 or more.
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4.发明授权公开(公告)号：US12071573B2
公开(公告)日：2024-08-27
申请号：US16967504
申请日：2019-01-28
发明人： Naofumi Kosaka , Yosuke Shimizu , Satoshi Honda , Taiki Shimokuri , Shou Takarada , Masayuki Satake , Kenichi Okada , Atsushi Takashima , Ginji Mizuhara , Masayuki Okamoto , Ryoko Asai
IPC分类号： C09J7/38 , B32B7/06 , B32B27/18 , B32B27/30 , B32B37/12 , B32B37/18 , B32B38/10 , C09J11/06 , C09J11/08 , C09J133/08
CPC分类号： C09J7/385 , B32B7/06 , B32B27/18 , B32B27/308 , B32B37/12 , B32B37/182 , B32B38/10 , C09J11/06 , C09J11/08 , C09J133/08 , B32B2037/1276 , B32B2307/728 , B32B2333/12 , B32B2405/00 , C09J2301/408 , C09J2301/502 , C09J2433/00 , C09J2467/006
摘要： 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 NO 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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公开(公告)号：US11970644B2
公开(公告)日：2024-04-30
申请号：US16967517
申请日：2019-01-28
发明人： Naofumi Kosaka , Yosuke Shimizu , Satoshi Honda , Taiki Shimokuri , Shou Takarada , Masayuki Satake , Kenichi Okada , Atsushi Takashima , Ginji Mizuhara
CPC分类号： C09J7/385 , B32B7/06 , B32B7/12 , B32B43/006 , C09J5/02 , C09J133/08 , B32B2307/42 , C09J2301/312 , C09J2301/416 , C09J2301/502 , Y10T156/1111 , Y10T156/1126 , Y10T156/1928
摘要： 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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