公开(公告)号：US20240269780A1

公开(公告)日：2024-08-15

申请号：US18281221

申请日：2022-03-07

Applicant: NITTO DENKO CORPORATION

Inventor： Masatoshi KATO ,  Ayumi NITTA ,  Naofumi KOSAKA

IPC: B23K35/02 ,  B23K35/26 ,  B23K35/362 ,  C09J7/35 ,  C09J9/02 ,  C09J11/04 ,  C09J11/06 ,  C09J163/00 ,  C22C12/00 ,  H01R12/52 ,  H05K3/36

CPC classification number: B23K35/0233 ,  B23K35/264 ,  B23K35/362 ,  C09J7/35 ,  C09J9/02 ,  C09J11/04 ,  C09J11/06 ,  C09J163/00 ,  C22C12/00 ,  H01R12/52 ,  H05K3/368 ,  C09J2400/16 ,  C09J2400/20 ,  C09J2433/00 ,  C09J2463/00 ,  H05K2203/048

Abstract: A bonding sheet according to the present invention contains a matrix resin; solder particles; and a fluxing agent. In the bonding sheet, the solder particles are dispersed in the matrix resin, and the fluxing agent is unevenly distributed around the solder particles in the matrix resin. The method for producing the bonding sheet of the present invention includes a first step of dissolving a fluxing agent in a first solvent to prepare a fluxing agent solution; a second step of mixing a second solvent, a matrix resin component, solder particles, and the fluxing agent solution to prepare a mixed composition; and a third step of applying the mixed composition onto a substrate to form a coated film, and then drying the coated film to form a bonding sheet.

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.

公开(公告)号：US20230102613A1

公开(公告)日：2023-03-30

申请号：US17800727

申请日：2021-02-19

Applicant: NITTO DENKO CORPORATION

Inventor： Mizuho MIZUNO ,  Akiko TANAKA ,  Naofumi KOSAKA ,  Kozo NAKAMURA

IPC: C09J133/12 ,  C09J133/08

Abstract: An adhesive layer (20a) has a creep deformation rate when a stress of 10000 Pa is applied at 50° C. for 1 second is 10% or less, and a creep deformation rate when a stress of 10000 Pa is applied at 50° C. for 30 minutes is 16% or less, in a creep test using a rotational rheometer, and has a 180° peel adhesive strength of 10 mN/20 mm or more with respect to a PMMA film.

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.

公开(公告)号：US20240409788A1

公开(公告)日：2024-12-12

申请号：US18697099

申请日：2022-09-21

Applicant: NITTO DENKO CORPORATION

Inventor： Satoshi HONDA ,  Yusuke TAKEDA ,  Kenta KUMAKURA ,  Naofumi KOSAKA ,  Tomokazu TAKAHASHI

IPC: C09J7/38 ,  C09J11/06 ,  C09J133/10

Abstract: The present invention provides a pressure-sensitive adhesive composition having an excellent adhesive force when bonding to an adherend, having excellent peelability when subjected to batch heat treatments at a high temperature, and having both a high initial adhesive force and a low post-heating adhesive force. The pressure-sensitive adhesive composition according to the present invention contains: a material having a radically polymerizable functional group; and a thermal polymerization initiator that generates a radical, in which a content of the thermal polymerization initiator is 1.2 to 10 parts by mass with respect to 100 parts by mass of all components excluding the thermal polymerization initiator.

公开(公告)号：US20220169002A1

公开(公告)日：2022-06-02

申请号：US17432345

申请日：2020-02-14

Applicant: NITTO DENKO CORPORATION ,  KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION

Inventor： Satoshi HONDA ,  Naofumi KOSAKA ,  Shotaro MASUDA ,  Atsushi YASUI ,  Hiroki AGO ,  Kenji KAWAHARA ,  Shun OYAMA

IPC: B32B37/12 ,  B32B7/12

Abstract: The present invention relates to a laminate including a two-dimensional material and an adhesive sheet having a base material and an adhesive layer whose adhesive force decreases due to ultraviolet rays or heat, in which an adhesive force A at 25° C. of the adhesive layer before the ultraviolet rays or heat applies, to a silicon wafer is 1.0 N/20 mm to 20.0 N/20 mm when the adhesive layer is subjected to 180° peeling at a tensile speed of 300 mm/min, and a surface roughness of an adhesive surface of the adhesive layer after the ultraviolet rays or heat has been applied is 0.01 μm to 8.00 μm.

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°.

公开(公告)号：US20190016923A1

公开(公告)日：2019-01-17

申请号：US15551062

申请日：2016-03-07

Applicant: NITTO DENKO CORPORATION

Inventor： Kensuke TANI ,  Mizuho NAGATA ,  Kaori MIZOBATA ,  Masatsugu SOGA ,  Ryota MASUDA ,  Masayuki SATAKE ,  Kenichi OKADA ,  Naofumi KOSAKA ,  Keisuke SHIMOKITA

IPC: C09J7/02

CPC classification number: C09J7/383 ,  C09D7/45 ,  C09J7/20 ,  C09J7/385 ,  C09J7/387

Abstract: 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.

公开(公告)号：US20240392172A1

公开(公告)日：2024-11-28

申请号：US18696005

申请日：2022-09-21

Applicant: NITTO DENKO CORPORATION

Inventor： Yusuke TAKEDA ,  Satoshi HONDA ,  Kenta KUMAKURA ,  Naofumi KOSAKA

IPC: C09J133/04 ,  C09J7/38 ,  C09J11/08

Abstract: The present invention provides a pressure-sensitive adhesive composition having an excellent pressure-sensitive adhesive force to an adherend even in a high temperature, enabling peeling with a small peel force without any adhesive residue when brought into contact with warm water during peeling, and having a pressure-sensitive adhesive force and easy peelability. The pressure-sensitive adhesive composition according to the present invention contains: an acrylic polymer containing a structural unit of an alkoxy group-containing (meth)acrylate monomer as a main component and containing, with respect to 100 parts by mass of all components of monomer structural units, 1 to 40 parts by mass of a structural unit of a polymerizable monomer having a homopolymer Tg of 0° C. or higher; and a surfactant.

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°.