Patents by Inventor Yasuyuki Tokunaga
Yasuyuki Tokunaga 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).
-
Patent number: 8715450Abstract: The present invention provides a foamed member capable of inhibiting or preventing foam breakage at the time when the foam member is peeled from a carrier tape, even when the foamed member has a high expansion ratio. The foamed member has a thermoplastic resin foam layer containing a thermoplastic resin foam formed through a step of impregnating a high-pressure inert gas into a thermoplastic resin and subsequently reducing pressure, and at least one of a thermoplastic polyester-based resin layer and a thermoplastic elastomer resin layer disposed on at least one side of the thermoplastic resin foam layer.Type: GrantFiled: June 7, 2012Date of Patent: May 6, 2014Assignee: Nitto Denko CorporationInventors: Makoto Saitou, Yasuyuki Tokunaga, Hideki Nagatsu
-
Patent number: 8299402Abstract: The present invention relates to a disassemblable structure including: a double-coated pressure-sensitive adhesive tape or a double-coated pressure sensitive adhesive sheet including a substrate and pressure-sensitive adhesive layers formed on both surfaces of the substrate, at least one of the pressure-sensitive adhesive layers being a thermal foaming agent-containing pressure-sensitive adhesive layer; a heating element which foams the thermal foaming agent-containing pressure-sensitive adhesive layer by heating; and a pair of adherends joined to each other through the pressure-sensitive adhesive tape or sheet and the heating element.Type: GrantFiled: November 10, 2009Date of Patent: October 30, 2012Assignee: Nitto Denko CorporationInventors: Eiji Yamanaka, Michirou Kawanishi, Masahiko Ando, Yasuyuki Tokunaga, Tooru Nakashima
-
Publication number: 20120241079Abstract: The present invention provides a foamed member capable of inhibiting or preventing foam breakage at the time when the foam member is peeled from a carrier tape, even when the foamed member has a high expansion ratio. The foamed member has a thermoplastic resin foam layer containing a thermoplastic resin foam formed through a step of impregnating a high-pressure inert gas into a thermoplastic resin and subsequently reducing pressure, and at least one of a thermoplastic polyester-based resin layer and a thermoplastic elastomer resin layer disposed on at least one side of the thermoplastic resin foam layer.Type: ApplicationFiled: June 7, 2012Publication date: September 27, 2012Applicant: NITTO DENKO CORPORATIONInventors: Makoto SAITOU, Yasuyuki Tokunaga, Hideki Nagatsu
-
Patent number: 8221877Abstract: The present invention provides a foamed member capable of inhibiting or preventing foam breakage at the time when the foam member is peeled from a carrier tape, even when the foamed member has a high expansion ratio. The foamed member has a thermoplastic resin foam layer containing a thermoplastic resin foam formed through a step of impregnating a high-pressure inert gas into a thermoplastic resin and subsequently reducing pressure, and at least one of a thermoplastic polyester-based resin layer and a thermoplastic elastomer resin layer disposed on at least one side of the thermoplastic resin foam layer.Type: GrantFiled: April 6, 2006Date of Patent: July 17, 2012Assignee: Nitto Denko CorportionInventors: Makoto Saitou, Yasuyuki Tokunaga, Hideki Nagatsu
-
Patent number: 8211953Abstract: The present invention relates to a polyolefin resin foam which includes a polyolefin resin composition includes: (A) a rubber and/or a thermoplastic elastomer; (B) a polyolefin resin; and (C) at least one aliphatic compound selected from an aliphatic acid, an aliphatic acid amide and an aliphatic acid metallic soap, the compound having a polar functional group and having a melting point of 50 to 150° C., in which a content of the aliphatic compound is 1 to 5 parts by weight based on 100 parts by weight of the total amount of the rubber and/or thermoplastic elastomer and the polyolefin resin. The polyolefin resin foam of the invention is excellent in flexibility and cushioning properties, and has good processability, especially excellent cutting processability.Type: GrantFiled: September 27, 2007Date of Patent: July 3, 2012Assignee: Nitto Denko CorporationInventors: Makoto Saitou, Yasuyuki Tokunaga, Takio Itou, Hiroki Fujii
-
Publication number: 20120034447Abstract: Provided is a heat-expandable removable acrylic pressure-sensitive adhesive tape that has high normal-state adhesive power when bonded independently of whether the adherend has or does not have irregular surface and permits easy separation when the bonded region is separated and disassembled by lowering the adhesive power by heating, that permits easily separation-decomposition, even after long-term storage at high temperature. The heat-expandable removable acrylic pressure-sensitive adhesive tape or sheet according to the present invention includes at least a heat expanding agent-containing pressure-sensitive adhesive layer, and the tape or sheet has an initial 90° peel adhesive strength to a polycarbonate plate as adherend of 10 N/25 mm or more and a 90° peel adhesive strength after storage in an atmosphere at 80° C. for 2 months as bonded to the polycarbonate adherend and after heat expansion treatment of less than 10 N/25 mm.Type: ApplicationFiled: April 15, 2010Publication date: February 9, 2012Applicant: NITTO DENKO CORPORATIONInventors: Naoaki Higuchi, Yasuyuki Tokunaga, Tooru Nakashima, Eiji Yamanaka
-
Patent number: 8101671Abstract: An object of the invention is to provide a polyolefin resin foam which is excellent in flexibility, cushioning property and processability, especially excellent in cutting processability. The present invention relates to a polyolefin resin foam obtained by foaming a polyolefin resin composition using carbon dioxide in a supercritical state, wherein the polyolefin resin composition contains at least: (1) a thermoplastic elastomer composition obtained by subjecting to a dynamically heat treatment a mixture of (A) a rubber, and (B) (B-1) an ?-olefin crystalline thermoplastic resin and/or (B-2) an ?-olefin amorphous thermoplastic resin, each having a melt tension of less than 3.0 cN at a temperature of 210° C. and at a take-up speed of 2.0 m/min, in the presence of (C) a crosslinking agent; (2) a polyolefin resin; and (3) a nucleant agent having an average particle diameter of from 0.1 ?m to less than 2.0 ?m. The polyolefin resin foam has a density, for example, of 0.2 g/cm2 or less.Type: GrantFiled: March 30, 2007Date of Patent: January 24, 2012Assignees: JSR Corporation, Nitto Denko CorporationInventors: Kentarou Kanae, Norihiro Yamamoto, Takio Itou, Yasuyuki Tokunaga, Makoto Saitou
-
Publication number: 20100116807Abstract: The present invention relates to a disassemblable structure including: a double-coated pressure-sensitive adhesive tape or a double-coated pressure sensitive adhesive sheet including a substrate and pressure-sensitive adhesive layers formed on both surfaces of the substrate, at least one of the pressure-sensitive adhesive layers being a thermal foaming agent-containing pressure-sensitive adhesive layer; a heating element which foams the thermal foaming agent-containing pressure-sensitive adhesive layer by heating; and a pair of adherends joined to each other through the pressure-sensitive adhesive tape or sheet and the heating element.Type: ApplicationFiled: November 10, 2009Publication date: May 13, 2010Applicant: NITTO DENKO CORPORATIONInventors: Eiji YAMANAKA, Michirou KAWANISHI, Masahiko ANDO, Yasuyuki TOKUNAGA, Tooru NAKASHIMA
-
Publication number: 20100016458Abstract: The present invention relates to a polyolefin resin foam which includes a polyolefin resin composition includes: (A) a rubber and/or a thermoplastic elastomer; (B) a polyolefin resin; and (C) at least one aliphatic compound selected from an aliphatic acid, an aliphatic acid amide and an aliphatic acid metallic soap, the compound having a polar functional group and having a melting point of 50 to 150° C., in which a content of the aliphatic compound is 1 to 5 parts by weight based on 100 parts by weight of the total amount of the rubber and/or thermoplastic elastomer and the polyolefin resin. The polyolefin resin foam of the invention is excellent in flexibility and cushioning properties, and has good processability, especially excellent cutting processability.Type: ApplicationFiled: September 27, 2007Publication date: January 21, 2010Applicant: Nitto Denko CorporationInventors: Makoto Saitou, Yasuyuki Tokunaga, Takio Itou, Hiroki Fujii
-
Publication number: 20090209670Abstract: An object of the invention is to provide a polyolefin resin foam which is excellent in flexibility, cushioning property and processability, especially excellent in cutting processability. The present invention relates to a polyolefin resin foam obtained by foaming a polyolefin resin composition using carbon dioxide in a supercritical state, wherein the polyolefin resin composition contains at least: (1) a thermoplastic elastomer composition obtained by subjecting to a dynamically heat treatment a mixture of (A) a rubber, and (B) (B-1) an ?-olefin crystalline thermoplastic resin and/or (B-2) an ?-olefin amorphous thermoplastic resin, each having a melt tension of less than 3.0 cN at a temperature of 210° C. and at a take-up speed of 2.0 m/min, in the presence of (C) a crosslinking agent; (2) a polyolefin resin; and (3) a nucleant agent having an average particle diameter of from 0.1 ?m to less than 2.0 ?m. The polyolefin resin foam has a density, for example, of 0.2 g/cm2 or less.Type: ApplicationFiled: March 30, 2007Publication date: August 20, 2009Applicants: JSR CORPORATION, NITTO DENKO CORPORATIONInventors: Kentarou Kanae, Norihiro Yamamoto, Takio Itou, Yasuyuki Tokunaga, Makoto Saito
-
Publication number: 20090061206Abstract: The present invention provides a foamed member capable of inhibiting or preventing foam breakage at the time when the foam member is peeled from a carrier tape, even when the foamed member has a high expansion ratio. The foamed member has a thermoplastic resin foam layer containing a thermoplastic resin foam formed through a step of impregnating a high-pressure inert gas into a thermoplastic resin and subsequently reducing pressure, and at least one of a thermoplastic polyester-based resin layer and a thermoplastic elastomer resin layer disposed on at least one side of the thermoplastic resin foam layer.Type: ApplicationFiled: April 6, 2006Publication date: March 5, 2009Applicant: Nitto Denko CorporationInventors: Makoto Saitou, Yasuyuki Tokunaga, Hideki Nagatsu
-
Publication number: 20070104913Abstract: A pressure-sensitive adhesive label has a base having an information indication portion on its one surface thereof, and a pressure-sensitive adhesive layer formed on another surface of the base. After peeling a release liner, the label is stuck on an outer surface of a housing of the hard disk drive to reduce noise generated when the hard disk drive is driven. The release liner for coating the pressure-sensitive adhesive layer has an antistatic function and a cut line. The adhesive force of the adhesive layer is reduced by heating. The label has a surface density of not lower than 0.Type: ApplicationFiled: November 22, 2006Publication date: May 10, 2007Inventors: Takahiro Nonaka, Yasuyuki Tokunaga, Naoyuki Nishiyama, Shinji Inokuchi, Masahiro Ohura, Akihisa Murata, Yasunori Sugihara
-
Patent number: 7196867Abstract: A pressure-sensitive adhesive label has a base having an information indication portion on its one surface thereof, and a pressure-sensitive adhesive layer formed on another surface of the base. After peeling a release liner, the label is stuck on an outer surface of a housing of the hard disk drive to reduce noise generated when the hard disk drive is driven. The release liner for coating the pressure-sensitive adhesive layer has an antistatic function and a cut line. The adhesive force of the adhesive layer is reduced by heating. The label has a surface density of not lower than 0.18 (kg/m2).Type: GrantFiled: December 1, 2004Date of Patent: March 27, 2007Assignee: Nitto Denko CorporationInventors: Takahiro Nonaka, Yasuyuki Tokunaga, Naoyuki Nishiyama, Shinji Inokuchi, Masahiro Ohura, Akihisa Murata, Yasunori Sugihara
-
Patent number: 6903898Abstract: A pressure-sensitive adhesive label has a base having an information indication portion on its one surface thereof, and a pressure-sensitive adhesive layer formed on another surface of the base. After peeling a release liner, the label is stuck on an outer surface of a housing of the hard disk drive to reduce noise generated when the hard disk drive is driven. The release liner for coating the pressure-sensitive adhesive layer has an antistatic function and a cut line. The adhesive force of the adhesive layer is reduced by heating. The label has a surface density of not lower than 0.18 (kg/m2).Type: GrantFiled: April 23, 2002Date of Patent: June 7, 2005Assignee: Nitto Denko CorporationInventors: Takahiro Nonaka, Yasuyuki Tokunaga, Naoyuki Nishiyama, Shinji Inokuchi, Masahiro Ohura, Akihisa Murata, Yasunori Sugihara
-
Publication number: 20050078408Abstract: A pressure-sensitive adhesive label has a base having an information indication portion on its one surface thereof, and a pressure-sensitive adhesive layer formed on another surface of the base. After peeling a release liner, the label is stuck on an outer surface of a housing of the hard disk drive to reduce noise generated when the hard disk drive is driven. The release liner for coating the pressure-sensitive adhesive layer has an antistatic function and a cut line. The adhesive force of the adhesive layer is reduced by heating. The label has a surface density of not lower than 0.18 (kg/m2).Type: ApplicationFiled: December 1, 2004Publication date: April 14, 2005Inventors: Takahiro Nonaka, Yasuyuki Tokunaga, Naoyuki Nishiyama, Shinji Inokuchi, Masahiro Ohura, Akihisa Murata, Yasunori Sugihara
-
Patent number: 6805953Abstract: In accordance with the present invention, a foamed structure having closed cells or both closed cells and open cells can be effectively used as a waterstop sealing material. In particular, a waterstop sealing material having excellent sealing properties can be provided. The waterstop sealing material comprises a foamed structure having closed cells or both closed cells and open cells, the foamed structure having a multi-layer pressure-sensitive adhesive layer provided on at least one side thereof, optionally through a base material, the multi-layer pressure-sensitive adhesive layer comprising as an outermost layer a layer made of a pressure-sensitive adhesive composition containing a polymer having a polycarbonate structure having a repeating unit represented by formula: wherein R represents a C2-20 straight-chain or branched hydrocarbon group and n represents a positive integer.Type: GrantFiled: February 9, 2000Date of Patent: October 19, 2004Assignee: Nitto Denko CorporationInventors: Katsuhiko Tachibana, Masahiko Ando, Yasuyuki Tokunaga, Manabu Matsunaga, Atsushi Kuriu
-
Patent number: 6636378Abstract: A pressure sensitive adhesive label for a hard disk drive includes a substrate, an information indicator formed on one side of the substrate, and a pressure sensitive adhesive layer formed on the other side of the substrate. By applying onto the outer surface of a housing of a hard disk drive, the pressure sensitive adhesive label can reduce noise caused by operation of the hard disk drive. The pressure sensitive adhesive label for a hard disk drive can concurrently exhibit various information indicating functions and the function of reducing noise caused by operation of a hard disk drive. By using the pressure sensitive adhesive label, a method can reduce noise caused by operation of a hard disk drive.Type: GrantFiled: December 4, 2001Date of Patent: October 21, 2003Assignee: Nitto Denko CorporationInventors: Yasuyuki Tokunaga, Naoyuki Nishiyama, Yasunori Sugihara, Hideyuki Kitai, Masahiro Ohura
-
Publication number: 20030143389Abstract: In accordance with the present invention, a foamed structure having closed cells or both closed cells and open cells can be effectively used as a waterstop sealing material. In particular, a waterstop sealing material having excellent sealing properties can be provided.Type: ApplicationFiled: February 9, 2000Publication date: July 31, 2003Inventors: Katsuhiko Tachibana, Masahiko Ando, Yasuyuki Tokunaga, Manabu Matsunaga, Atsushi Kuriu
-
Publication number: 20020191331Abstract: A pressure-sensitive adhesive label has a base having an information indication portion on its one surface thereof, and a pressure-sensitive adhesive layer formed on another surface of the base. After peeling a release liner, the label is stuck on an outer surface of a housing of the hard disk drive to reduce noise generated when the hard disk drive is driven. The release liner for coating the pressure-sensitive adhesive layer has an antistatic function and a cut line. The adhesive force of the adhesive layer is reduced by heating. The label has a surface density of not lower than 0.18 (kg/m2).Type: ApplicationFiled: April 23, 2002Publication date: December 19, 2002Inventors: Takahiro Nonaka, Yasuyuki Tokunaga, Naoyuki Nishiyama, Shinji Inokuchi, Masahiro Ohura, Akihisa Murata, Yasunori Sugihara
-
Publication number: 20020181147Abstract: A pressure sensitive adhesive label for a hard disk drive includes a substrate, an information indicator formed on one side of the substrate, and a pressure sensitive adhesive layer formed on the other side of the substrate. By applying onto the outer surface of a housing of a hard disk drive, the pressure sensitive adhesive label can reduce noise caused by operation of the hard disk drive.Type: ApplicationFiled: December 4, 2001Publication date: December 5, 2002Inventors: Yasuyuki Tokunaga, Naoyuki Nishiyama, Yasunori Sugihara, Hideyuki Kitai, Masahiro Ohura