Patents by Inventor Kenjiro Niimi
Kenjiro Niimi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20150037578Abstract: A pressure-sensitive adhesive sheet having a supporting film, a pressure-sensitive adhesive layer formed from a pressure-sensitive adhesive composition on one surface of the supporting film, and a top coat layer on the other surface opposite to the surface having the pressure-sensitive adhesive layer of the supporting film, wherein the top coat layer contains wax as a lubricant and a polyester resin as a binder and having the properties as defined.Type: ApplicationFiled: July 30, 2014Publication date: February 5, 2015Applicant: NITTO DENKO CORPORATIONInventors: Kenichi KATAOKA, Tatsumi AMANO, Kenjiro NIIMI, Hiromoto HARUTA
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Publication number: 20150037574Abstract: Provided is a surface protective film, which has a substrate having a topcoat layer containing a lubricating property imparting component and rarely whitened and an adhesive layer formed of a water dispersible acrylic adhesive composition, and which is excellent in appearance characteristics etc. A surface protective film having: a substrate; and a topcoat layer and an acrylic adhesive layer formed on respective faces of the substrate, in which the topcoat layer contains a lubricant wax composed of a higher fatty acid/higher alcohol ester and a polyester binder resin, the acrylic adhesive layer is formed of a water dispersible acrylic adhesive composition containing an acrylic emulsion polymer (A) obtained by polymerization of an alkyl (meth)acrylate and a carboxyl group-containing unsaturated monomer with a reactive emulsifier, a compound (B) represented by formula (I): RaO—(PO)l-(EO)m—(PO)n—Rb??(I) and, an acetylene diol compound (C).Type: ApplicationFiled: July 24, 2014Publication date: February 5, 2015Applicant: NITTO DENKO CORPORATIONInventors: Tatsumi Amano, Kenjiro Niimi, Kazuma Mitsui
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Publication number: 20150037577Abstract: A pressure-sensitive adhesive sheet having a supporting film, a pressure-sensitive adhesive layer formed from a pressure-sensitive adhesive composition on one surface of the supporting film, and a top coat layer on the other surface opposite to the surface having the pressure-sensitive adhesive layer of the supporting film, wherein the top coat layer contains wax as a lubricant and a polyester resin as a binder; and the pressure-sensitive adhesive composition contains a (meth)acryl-based polymer as defined.Type: ApplicationFiled: July 30, 2014Publication date: February 5, 2015Applicant: NITTO DENKO CORPORATIONInventors: Kenichi KATAOKA, Tatsumi AMANO, Kenjiro NIIMI, Hiromoto HARUTA
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Publication number: 20150037572Abstract: Provided is a surface protective film, which has a substrate having a topcoat layer containing a lubricating property imparting component and rarely whitened and an adhesive layer formed of a water dispersible acrylic adhesive composition, and which is excellent in removability etc. A surface protective film having: a substrate; and a topcoat layer and an acrylic adhesive layer formed on respective faces of the substrate, in which the topcoat layer contains a lubricant wax composed of a higher fatty acid/higher alcohol ester and a polyester binder resin, the acrylic adhesive layer is formed of a water dispersible acrylic adhesive composition containing an acrylic emulsion polymer obtained by polymerization of an alkyl (meth)acrylate (A) and a carboxyl group-containing unsaturated monomer (B) with a reactive emulsifier.Type: ApplicationFiled: July 24, 2014Publication date: February 5, 2015Inventors: Tatsumi Amano, Kenjiro Niimi, Kazuma Mitsui
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Publication number: 20150037576Abstract: A pressure-sensitive adhesive sheet having a supporting film, a pressure-sensitive adhesive layer formed from a pressure-sensitive adhesive composition on one surface of the supporting film, and a top coat layer on the other surface opposite to the surface having the pressure-sensitive adhesive layer of the supporting film, wherein the top coat layer contains wax as a lubricant and a polyester resin as a binder and having the properties as defined.Type: ApplicationFiled: July 30, 2014Publication date: February 5, 2015Applicant: NITTO DENKO CORPORATIONInventors: Kenichi KATAOKA, Tatsumi AMANO, Kenjiro NIIMI, Hiromoto HARUTA
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Publication number: 20150037573Abstract: Provided is a surface protective film, which has a substrate having a topcoat layer containing a lubricating property-imparting component and rarely whitened and an adhesive layer formed of a water dispersible acrylic adhesive composition, and which is excellent in appearance characteristics, etc. A surface protective film has a substrate; and a topcoat layer and an acrylic adhesive layer formed on respective faces of the substrate, in which the topcoat layer contains a lubricant wax composed of a higher fatty acid/higher alcohol ester and a polyester binder resin, the acrylic adhesive layer is formed of a water dispersible acrylic adhesive composition containing an acrylic emulsion polymer (A) obtained by polymerization of an alkyl(meth)acrylate and a carboxyl group-containing unsaturated monomer with a reactive emulsifier having a radical polymerizable functional group; and a compound (B) represented by formula (I): R1O—(PO)a-(EO)b—(PO)c—R2 (I).Type: ApplicationFiled: July 24, 2014Publication date: February 5, 2015Inventors: Tatsumi Amano, Kenjiro Niimi, Kazuma Mitsui
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Patent number: 8906989Abstract: A pressure-sensitive adhesive layer contains a base polymer and has properties of (1) and (2) below: in a case where a pressure-sensitive adhesive sheet A is laminated to an adherend X surface, they are left to stand at a temperature of 23° C. and a humidity of 30% for 12 hours, and the pressure-sensitive adhesive sheet A is then separated, (1) a water contact angle A on the adherend X surface from which the pressure-sensitive adhesive sheet A has been separated is 70° or less, and (2) a pressure-sensitive adhesive strength of a pressure-sensitive adhesive tape B with respect to the adherend X surface from which the pressure-sensitive adhesive sheet A has been separated is higher than that of the pressure-sensitive adhesive tape B with respect to the adherend X surface not subjected to any treatment.Type: GrantFiled: March 27, 2014Date of Patent: December 9, 2014Assignee: Nitto Denko CorporationInventors: Natsuko Watanabe, Kazuma Mitsui, Tatsumi Amano, Kenjiro Niimi
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Publication number: 20140296401Abstract: A pressure-sensitive adhesive layer contains a base polymer and has properties of (1) and (2) below: in a case where a pressure-sensitive adhesive sheet A is laminated to an adherend X surface, they are left to stand at a temperature of 23° C. and a humidity of 30% for 12 hours, and the pressure-sensitive adhesive sheet A is then separated, (1) a water contact angle A on the adherend X surface from which the pressure-sensitive adhesive sheet A has been separated is 70° or less, and (2) a pressure-sensitive adhesive strength of a pressure-sensitive adhesive tape B with respect to the adherend X surface from which the pressure-sensitive adhesive sheet A has been separated is higher than that of the pressure-sensitive adhesive tape B with respect to the adherend X surface not subjected to any treatment.Type: ApplicationFiled: March 27, 2014Publication date: October 2, 2014Applicant: NITTO DENKO CORPORATIONInventors: Natsuko WATANABE, Kazuma MITSUI, Tatsumi AMANO, Kenjiro NIIMI
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Patent number: 8685535Abstract: A surface protective film that exhibits superior adhesiveness to an adherend and exhibits only small differences in peel strength according to the surface state of an adherend is provided. The surface protective film 10 is provided with an acrylic pressure-sensitive adhesive (PSA) layer 2 on one side of a support 1, and satisfies the following conditions: a thickness reduction ratio (indentation strain E1) when a compressive stress of 0.195 MPa is applied for 10 minutes to a laminate 20 obtained by laminating 24 of the protective films 10 is 7.0% or more, and a ratio (E1/E2) of E1 to a thickness reduction ratio (permanent strain) E2 that remains 10 minutes after the stress is released is 30 or less; and a peel strength S1 on a plain TAC polarizing plate is two times or less a peel strength S2 on a TAG polarizing plate that has been subjected to AG treatment.Type: GrantFiled: February 17, 2011Date of Patent: April 1, 2014Assignee: Nitto Denko CorporationInventors: Kenjiro Niimi, Masato Yamagata, Hiromoto Haruta, Yuka Sekiguchi
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Publication number: 20140011022Abstract: The present invention provides a PSA sheet combining higher levels of antistaticity, anchoring and less contaminating nature. The PSA sheet comprises a substrate film formed from a resin material, a pressure-sensitive adhesive layer provided on a first face thereof, and an antistatic layer provided between the first face and the pressure-sensitive adhesive layer. The antistatic layer comprises an antistatic ingredient ASu. The pressure-sensitive adhesive layer comprises an acrylic polymer as a base polymer, and an ionic compound as an antistatic ingredient ASp.Type: ApplicationFiled: February 28, 2012Publication date: January 9, 2014Applicant: NITTO DENKO CORPORATIONInventors: Natsuki Ukei, Kenichi Kataoka, Hiromoto Haruta, Kenjiro Niimi, Tatsumi Amano
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Publication number: 20130280527Abstract: The invention provides a surface protection film including a top coat layer on a first face of a substrate, and a pressure-sensitive adhesive layer on a second face. The top coat layer includes a wax as a slip agent, and a polyester resin as a binder. Here, the wax is an ester of a higher fatty acid and a higher alcohol.Type: ApplicationFiled: April 22, 2013Publication date: October 24, 2013Applicant: NITTO DENKO CORPORATIONInventors: Kenjiro NIIMI, Natsuki UKEI, Hiromoto HARUTA, Kenichi KATAOKA, Kazuma MITSUI, Yu MORIMOTO, Tatsumi AMANO
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Publication number: 20130260147Abstract: The prevent invention provides a pressure-sensitive adhesive sheet which can prevent increase of the adhesion with the lapse of time, has low adhesion at the time of high speed peeling, and is excellent in removability and workability. The pressure-sensitive adhesive sheet has a pressure-sensitive adhesive layer formed using a pressure-sensitive adhesive composition on one or both surfaces of a supporting film and is characterized in that the adhesion ratio (B/A) of the adhesion (A) at a peeling speed of 30 m/min after 30 minute-bonding of the pressure-sensitive adhesive surface of the pressure-sensitive adhesive layer to a TAC surface at 23° C. and the adhesion (B) at a peeling speed of 30 m/min after one day-bonding of the pressure-sensitive adhesive surface of the pressure-sensitive adhesive layer to a TAC surface at 50° C. is in a range of 0.5 to 1.5.Type: ApplicationFiled: March 28, 2013Publication date: October 3, 2013Applicant: NITTO DENKO CORPORATIONInventors: Kenichi Kataoka, Natsuki Ukei, Tatsumi Amano, Kenjiro Niimi
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Publication number: 20130260148Abstract: The present invention provides a pressure-sensitive adhesive sheet having an adequate adhesion so as not to cause blistering and peeling with the lapse of time and is excellent in re-peeling property and workability. The pressure-sensitive adhesive sheet provided is a pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer formed using a pressure-sensitive adhesive composition on one or both surfaces of a supporting film, in which the shift length after 30 minutes from a creep test carried out at 23° C. and a shearing load of 500 g by bonding an adhesive area of 200 mm2 of the pressure-sensitive adhesive layer to a TAC polarizing plate is 2.5 mm or less, and the adhesion at a peeling rate of 0.3 m/min after 30 minute-bonding of a pressure-sensitive adhesive surface of the pressure-sensitive adhesive layer to a TAC surface at 23° C. is 0.3 N/25 mm or less.Type: ApplicationFiled: March 28, 2013Publication date: October 3, 2013Applicant: NITTO DENKO CORPORATIONInventors: Kenichi Kataoka, Natsuki Ukei, Tatsumi Amano, Kenjiro Niimi
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Publication number: 20120258305Abstract: Provided are a transparent film of an excellent visual quality and a pressure-sensitive adhesive film including the transparent film. Transparent film includes base layer formed of transparent resinous material and top coat layer provided on its first face. Top coat layer has an average thickness Dave of 2 nm to 50 nm and the thickness deviation ?D is 40% or smaller of the average thickness Dave.Type: ApplicationFiled: January 20, 2011Publication date: October 11, 2012Applicant: NITTO DENKO CORPORATIONInventors: Hiromoto Haruta, Kenjiro Niimi, Hironobu Machinaga, Yoshihiro Kitamura, Ikuya Kuzuhara
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Publication number: 20120202055Abstract: A pressure-sensitive adhesive sheet 1 provided by the present invention is provided with a substrate film 12 comprising a transparent resin material, an antistatic layer 14 provided on a first side 12A thereof, and a pressure-sensitive adhesive layer 20 provided on a second side 12B thereof. The antistatic layer 14 contains an antistatic component (for example, an electroconductive polymer) and a binder resin, and has an average thickness Dave of 1 nm to less than 100 nm. The pressure-sensitive adhesive layer 20 contains an acrylic polymer as a base polymer and an ionic compound (such as an ionic liquid and alkaline metal salt) as an antistatic component.Type: ApplicationFiled: January 31, 2012Publication date: August 9, 2012Applicant: NITTO DENKO CORPORATIONInventors: Kenichi KATAOKA, Natsuki UKEI, Hiromoto HARUTA, Kenjiro NIIMI, Tatsumi AMANO
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Publication number: 20120171444Abstract: A transparent film whose back-face has excellent resistance to scratch, and a surface protection film having the transparent film are provided. A transparent film has a substrate layer formed of a transparent resin material, and a back-face layer with a thickness of 1 ?m or less provided on a first face thereof. In a scratch test of the transparent film, the failure initiation load of the back-face layer is 50 mN or greater and the friction coefficient of the back-face layer is 0.4 or less.Type: ApplicationFiled: July 9, 2010Publication date: July 5, 2012Applicant: NITTO DENKO CORPORATIONInventors: Hiromoto Haruta, Masato Yamagata, Kenjiro Niimi, Natsuki Ukei, Junko Nakano, Tsutomu Shimura, Hironobu Machinaga
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Publication number: 20120064339Abstract: The present invention provides a surface protective film that exhibits small differences in peel strength on account of the surface state of an adherend and that is excellent in anti-contamination to adherends, and a pressure-sensitive adhesive (PSA) composition for the protective film. The PSA composition provided by the present invention comprises 0.01 to 5 parts by weight of a compound containing an oxypropylene group with respect to 100 parts by weight of an acrylic polymer as a base polymer. A surface protective film 10 provided by the present invention has a PSA layer 2, formed using the above PSA composition, on one or both sides of a support 1.Type: ApplicationFiled: February 22, 2010Publication date: March 15, 2012Applicant: NITTO DENKO CORPORATIONInventors: Masato Yamagata, Natsuki Ukei, Kenichi Kataoka, Kenjiro Niimi, Hiromoto Haruta, Junko Nakano, Tsuyoshi Inoue
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Publication number: 20110206917Abstract: A surface protective film that exhibits superior adhesiveness to an adherend and exhibits only small differences in peel strength according to the surface state of an adherend is provided. The surface protective film 10 is provided with an acrylic pressure-sensitive adhesive (PSA) layer 2 on one side of a support 1, and satisfies the following conditions: a thickness reduction ratio (indentation strain E1) when a compressive stress of 0.195 MPa is applied for 10 minutes to a laminate 20 obtained by laminating 24 of the protective films 10 is 7.0% or more, and a ratio (E1/E2) of E1 to a thickness reduction ratio (permanent strain) E2 that remains 10 minutes after the stress is released is 30 or less; and a peel strength S1 on a plain TAC polarizing plate is two times or less a peel strength S2 on a TAG polarizing plate that has been subjected to AG treatment.Type: ApplicationFiled: February 17, 2011Publication date: August 25, 2011Applicant: NITTO DENKO CORPORATIONInventors: Kenjiro Niimi, Masato Yamagata, Hiromoto Haruta, Yuka Sekiguchi