公开(公告)号：US20170121481A1

公开(公告)日：2017-05-04

申请号：US15128623

申请日：2015-03-12

Applicant: NITTO DENKO CORPORATION

Inventor： Itsuhiro HATANAKA ,  Tetsuya OTSUKA ,  Yusuke YAMANARI ,  Hiroyuki SUZUKI ,  Kazumichi KATO ,  Kohei DOI

IPC: C08J9/12 ,  G06F3/041 ,  B32B5/20 ,  B32B7/12 ,  C08J9/00 ,  C09J7/02

CPC classification number: C08J9/122 ,  B32B5/022 ,  B32B5/20 ,  B32B5/245 ,  B32B7/06 ,  B32B7/12 ,  B32B29/007 ,  B32B29/02 ,  B32B2250/02 ,  B32B2250/03 ,  B32B2262/101 ,  B32B2262/106 ,  B32B2264/10 ,  B32B2264/102 ,  B32B2264/104 ,  B32B2264/108 ,  B32B2266/0207 ,  B32B2266/0214 ,  B32B2266/0228 ,  B32B2266/0235 ,  B32B2266/0242 ,  B32B2266/025 ,  B32B2266/0257 ,  B32B2266/0264 ,  B32B2266/0278 ,  B32B2266/0292 ,  B32B2266/06 ,  B32B2266/08 ,  B32B2270/00 ,  B32B2274/00 ,  B32B2307/50 ,  B32B2307/56 ,  B32B2307/72 ,  B32B2307/732 ,  B32B2323/10 ,  B32B2457/208 ,  B32B2571/00 ,  C08J9/0061 ,  C08J9/0066 ,  C08J2201/03 ,  C08J2201/032 ,  C08J2203/06 ,  C08J2203/08 ,  C08J2205/044 ,  C08J2205/05 ,  C08J2323/02 ,  C08J2323/12 ,  C08J2333/04 ,  C08J2333/20 ,  C08J2367/00 ,  C08J2423/08 ,  C08J2433/08 ,  C09J7/26 ,  C09J2201/606 ,  C09J2201/622 ,  C09J2203/318 ,  C09J2423/046 ,  C09J2423/106 ,  C09J2433/006 ,  C09J2467/006 ,  G06F3/041 ,  G06F2203/04103

Abstract: Provided is a resin foam (13) that highly restrains the occurrence of display irregularities in a display unit when the resin foam is used in a touch-screen-equipped device (1), where the display irregularities may occur with user's touch operations. The resin foam (13) according to the present invention is obtained by expansion of a resin composition including a resin. The resin foam has a 25% compression load of 0.1 N/cm2 to 8.0 N/cm2 and is used in the touch-screen-equipped device (1). The resin is preferably at least one resin selected from the group consisting of polyolefin resins, polyester resins, and acrylic resins.

公开(公告)号：US20190233681A1

公开(公告)日：2019-08-01

申请号：US16260563

申请日：2019-01-29

Applicant: NITTO DENKO CORPORATION

Inventor： Masahito NIWA ,  Itsuhiro HATANAKA ,  Taiki SHIMOKURI ,  Shou TAKARADA ,  Takahiro NONAKA ,  Keisuke HIRANO ,  Fumika KAWATAKE ,  Mika IKEMURA

IPC: C09J7/38 ,  C09J7/25 ,  C09J175/08 ,  C09J133/14 ,  C08F220/10 ,  G06F3/041

CPC classification number: C09J7/38 ,  C08F220/10 ,  C09J7/255 ,  C09J133/14 ,  C09J175/08 ,  G06F3/041

Abstract: A pressure sensitive adhesive includes an acryl-based base polymer. The acryl-based base polymer contains an acryl-based segment and a urethane-based segment. In the acryl-based base polymer, the content of the urethane-based segment is 3 to 20 parts by weight based on 100 parts by weight of the acryl-based segment. A pressure sensitive adhesive sheet can be obtained by applying a pressure sensitive adhesive composition on a substrate in a layer form. The pressure sensitive adhesive composition may be curable and may include a polymerization initiator. In formation of the pressure sensitive adhesive sheet, the curable pressure sensitive adhesive composition may be, as necessary.

公开(公告)号：US20230052577A1

公开(公告)日：2023-02-16

申请号：US17880092

申请日：2022-08-03

Applicant: NITTO DENKO CORPORATION

Inventor： Muneshige NAKAGAWA ,  Hiroaki TAKAHASHI ,  Fumika KAWATAKE ,  Nobukazu NEGISHI ,  Itsuhiro HATANAKA

IPC: C09J153/02 ,  C09J7/38 ,  C09J11/08 ,  C08L93/04

Abstract: A PSA composition comprising a block copolymer of a monovinyl-substituted aromatic compound and a conjugated diene compound, a tackifier resin, and a softening agent is provided. The tackifier resin comprises a natural product-based tackifier resin (A) having a softening point higher than 80° C. and containing no aromatic ring, and a petroleum-based tackifier resin (B) having a softening point higher than 100° C. and containing an aromatic ring. The content of the tackifier resin (A) is 40 to 120 parts by weight, the content of the tackifier resin (B) is 5 to 40 parts by weight, the total amount of the tackifier resin is 60 to 160 parts by weight, and the content of the softening agent is 5 to 40 parts by weight with respect to 100 parts by weight of the block copolymer, with respect to 100 parts by weight of the block copolymer.

公开(公告)号：US20130224434A1

公开(公告)日：2013-08-29

申请号：US13777606

申请日：2013-02-26

Applicant: NITTO DENKO CORPORATION

Inventor： Itsuhiro HATANAKA ,  Makoto SAITOU ,  Kazumichi KATO

IPC: C08L23/12

CPC classification number: C08L23/12 ,  C08L23/10 ,  C08L2201/02 ,  C08L2203/14 ,  C09J7/26 ,  C09J2201/606 ,  Y10T428/24273 ,  Y10T428/24331 ,  C08L23/16

Abstract: Disclosed is a resin foam sheet which has a low apparent density, is thin and flexible, and can be wound satisfactorily stably. The resin foam sheet has an apparent density of 0.02 to 0.30 g/cm3, a tensile strength of 0.5 to 3.0 MPa, a thickness of 0.20 to 0.70 mm, a length of 5 m or more, and a width of 300 mm or more and has openings on both sides. The resin foam sheet preferably has a value of 30% or less determined according to following Expression (1): (Thickness tolerance)/(Median thickness)×100  (1)

Abstract translation: 公开了一种表观密度低，薄而柔软的树脂发泡片，并且可以令人满意地稳定地卷绕。 树脂发泡体片的表观密度为0.02〜0.30g / cm 3，拉伸强度为0.5〜3.0MPa，厚度为0.20〜0.70mm，长度为5μm以上，宽度为300mm以上， 双方有开口。 树脂发泡体片材优选为根据下述式（1）确定的30％以下的值：（厚度公差）/（中值厚度）×100（1）

公开(公告)号：US20240093060A1

公开(公告)日：2024-03-21

申请号：US18275053

申请日：2022-01-26

Applicant: NITTO DENKO CORPORATION

Inventor： Akinori TAMURA ,  Itsuhiro HATANAKA ,  Nobukazu NEGISHI

IPC: C09J7/10 ,  C09J7/35 ,  C09J7/38

CPC classification number: C09J7/10 ,  C09J7/35 ,  C09J7/385 ,  C09J2400/20

Abstract: Provided is a hot-melt PSA composition having a low viscosity when melted with heat and capable of suitably forming a PSA layer. A hot-melt PSA composition comprising a base polymer is provided. The base polymer comprises acrylic polymers A and B. The acrylic polymer A is a polymer of monomers comprising, as the primary component, a (meth)acrylic monomer A having an alkyl group with 4 to 8 carbon atoms. The acrylic polymer B is a polymer of monomers comprising, as a primary component, a (meth)acrylic monomer B having an alkyl group with 9 to 12 carbon atoms. In the base polymer, with the total amount of the acrylic polymers A and B being 100% by weight, the acrylic polymer B content is 10% by weight or more and 90% by weight or less.

公开(公告)号：US20230096432A1

公开(公告)日：2023-03-30

申请号：US17800628

申请日：2021-02-17

Applicant: NITTO DENKO CORPORATION

Inventor： Nobukazu NEGISHI ,  Itsuhiro HATANAKA ,  Hiroaki TAKAHASHI

IPC: C09J7/38 ,  C09J7/35 ,  C09J11/06 ,  C09J133/10

Abstract: Provided is a hot-melt pressure-sensitive adhesive composition which enables to form a pressure-sensitive adhesive layer without allowing the progression of rapid gelation at the time of heating and melting. The pressure-sensitive adhesive composition provided by the present invention is a solvent-free hot-melt pressure-sensitive adhesive composition. The pressure-sensitive adhesive composition includes a base polymer, an isocyanate crosslinking agent, and a tackifier A represented by the following general formula (1): R—[(CH3)2C6H2—(CH2O)n—CH2]m—OH (1) (in the general formula (1), R is a hydrogen atom or a hydroxyl group, m is 9 to 16, and n is 0 to 3). A content of the tackifier A with respect to 100 parts by weight of the base polymer is 1 part by weight to 10 parts by weight.

公开(公告)号：US20190233683A1

公开(公告)日：2019-08-01

申请号：US16260459

申请日：2019-01-29

Applicant: NITTO DENKO CORPORATION

Inventor： Itsuhiro HATANAKA ,  Masahito NIWA ,  Taiki SHIMOKURI ,  Shou TAKARADA ,  Takahiro NONAKA ,  Keisuke HIRANO ,  Fumika KAWATAKE ,  Mika IKEMURA

IPC: C09J7/38 ,  C09J7/40 ,  C09J133/06 ,  C09J133/10

CPC classification number: C09J7/385 ,  C08L75/06 ,  C08L75/08 ,  C09J7/401 ,  C09J133/066 ,  C09J133/10 ,  C09J2205/114

Abstract: The pressure sensitive adhesive sheet is a sheet shaped pressure sensitive adhesive including an acryl-based base polymer. The acryl-based base polymer contains an acryl-based segment and a urethane-based segment, and a content of the urethane-based segment is 3 to 30 parts by weight based on 100 parts by weight of the acryl-based segment. The urethane-based segment includes at least one urethane chain selected from the group consisting of a polyether urethane and a polyester urethane. The content of the urethane-based segment other than the polyether urethane-based segment is 15 parts by weight or less based on 100 parts by weight of the acryl-based segment.