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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
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.
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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.
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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.
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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)
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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
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.
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6.
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.
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7.
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.
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