Patents by Inventor Hisashi Hamano

Hisashi Hamano 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).

  • Publication number: 20170291395
    Abstract: To provide a baseless double-sided adhesive sheet or tape that is configured such that adhesive does not exude during storage, or moreover during slitting to a predetermined size, or the like, and that is also capable for exhibiting the desired performance of having a cohesive force that resists peeling, without sacrificing the initial adhesive strength, and to provide a method for manufacturing the same. In the baseless double-sided adhesive sheet or tape, an adhesive layer formed from an adhesive serves as a center layer, and adhesive layers and formed from an adhesive are layered onto a front face and a rear face of the adhesive layer serving as the center layer. Fibers are least dispersed in the adhesive layer serving as the center layer, and the adhesive layer serving as the center layer between the adjacent adhesive layers has a relatively high fiber density and relatively low flowability.
    Type: Application
    Filed: March 24, 2017
    Publication date: October 12, 2017
    Inventors: Hisashi Hamano, Fumiko Watanabe
  • Patent number: 5958553
    Abstract: A biaxially oriented polyethylene-2,6-naphthalate film suitable for producing magnetic recording media wherein the film has a Young's modulus of at least 550 kg/mm.sup.2 in the longitudinal direction and a Young's modulus of at least 800 kg/mm.sup.2 in the transverse direction with the Young's modulus in the transverse direction being greater than the Young's modulus in the longitudinal direction by more than 200 kg/mm.sup.2 ; a surface roughness Ra of 1-12 nm; and low heat shrinkage. The film also contains 0.005-2% by weight inorganic or organic fine particles.
    Type: Grant
    Filed: February 3, 1997
    Date of Patent: September 28, 1999
    Assignee: Teijin Ltd.
    Inventors: Masahiro Hosoi, Hisashi Hamano, Yasuhiro Saeki, Masami Etchu
  • Patent number: 5731071
    Abstract: A biaxially oriented polyester film which has excellent resistances to dry heat deterioration and wet heat deterioration, which can withstand the use in an atmosphere of relatively high moisture content, and which is useful, for example, as an electrical insulating film, a film for transparent electrode, a film for absorption of electromagnetic wave (e.g. a film used as an inspection window of microwave oven) and a reflection film. This polyester contains ?ethylene-2,6-naphthalenedicarboxylate as the main recurring unit.! 99.5 to 95 mole % of ethylene-2,6-naphthalenedicarboxylate and 0.5 to 5 mole % of ethylene-2,7-naphthalenedicarboxylate and has a density of 1.355 to 1.370 g/cm.sup.3 and an intrinsic viscosity of 0.62 to 0.90. The polyester film has an amount of terminal carboxyl in the polyester of 40 eg/10.sup.6 g or less and an amount of oligomers of 2.0 mg/m.sup.2 film or less.
    Type: Grant
    Filed: July 17, 1995
    Date of Patent: March 24, 1998
    Assignee: Teijin Limited
    Inventors: Masami Etchu, Masahiro Hosoi, Masanori Nishiyama, Yasuhiro Saeki, Hisashi Hamano
  • Patent number: 5677033
    Abstract: Provided is a biaxially oriented, unidirectionally long polyethylene-2,6-naphthalenedicarboxylate film having the following characteristic properties;(A) both the Young's modulus in the longitudinal direction and the Young's modulus in the transverse direction are at least 600 kg/mm.sup.2, and the Young's modulus in the longitudinal direction is greater than the Young's modulus in the transverse direction,(B) the heat shrinkage factor in the transverse direction when the film has been treated under no load at 105.degree. C. for 30 minutes is at least 1%, and(C) the surface roughness Ra of one surface of the film is up to 5 nm, anda magnetic recording tape obtained by forming a thin magnetic metal film on the above film undergoes no curling, has high coercive force, has excellent electromagnetic conversion characteristic and permits high-density recording for a long period of time.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: October 14, 1997
    Assignee: Teijin Limited
    Inventors: Hisashi Hamano, Masahiro Hosoi, Ieyasu Kobayshi, Yasuhiro Saeki
  • Patent number: 5665454
    Abstract: A biaxially oriented polyethylene-2,6-naphthalate film suitable for producing magnetic recording media wherein the film has a Young's modulus of at least 550 kg/mm.sup.2 in the longitudinal direction and a Young's modulus of at least 800 kg/mm.sup.2 in the transverse direction with the Young's modulus in the transverse direction being greater than the Young's modulus in the longitudinal direction by more than 230 kg/mm.sub.2, a surface roughness Ra of 1-12 nm; and low heat shrinkage. The film also contains 0.005-2% by weight inorganic or organic fine particles.
    Type: Grant
    Filed: September 19, 1994
    Date of Patent: September 9, 1997
    Assignee: Teijin Limited
    Inventors: Masahiro Hosoi, Hisashi Hamano, Yasuhiro Saeki, Masami Etchu
  • Patent number: 5631063
    Abstract: A biaxially oriented film of a polyethylene-2,6-naphthalenedicarboxylate, which (A) has a Young's modulus of at least 800 kg/mm.sup.2 in the longitudinal direction and a Young's modulus of at least 500 kg/mm.sup.2 in the transverse direction, the Young's modulus in the longitudinal direction being greater than the Young's modulus in the transverse direction, (B) satisfies the following relationships between an elongation S.sub.M (%) in the longitudinal direction per a load of 1 kg/mm.sup.2 at 120.degree. C. and the Young's modulus Y.sub.M (kg/mm.sup.2) in the longitudinal direction,-0.001Y.sub.M +0.89<S.sub.M <-0.001Y.sub.M +1.57when Y.sub.M is 1,200 kg/mm.sup.2 or less,and-0.31<S.sub.M <0.37when Y.sub.M is greater than 1,200 kg/mm.sup.2, and (C) has a heat shrinkage percentage of 0.1% or less in the longitudinal direction when the biaxially oriented film has been heat-treated under no load at 70.degree. C. for 1 hour.
    Type: Grant
    Filed: December 19, 1994
    Date of Patent: May 20, 1997
    Assignee: Teijin Limited
    Inventors: Takao Chujo, Masanori Nishiyama, Hisashi Hamano
  • Patent number: 5618609
    Abstract: A biaxially oriented film of a polyethylene-2,6-naphthalenedicarboxylate, which (1) has a Young's modulus of at least 600 kg/mm.sup.2 in the transverse direction and a Young's modulus of at least 500 kg/mm.sup.2 in the longitudinal direction, the Young's modulus in the transverse direction being greater than the Young's modulus in the longitudinal direction, (2) satisfies the following relationships between an elongation S.sub.T (%) in the transverse direction per kg/mm.sup.2 of a load at 120.degree. C. and the Young's modulus Y.sub.T (kg/mm.sup.2) in the transverse direction,-0.001Y.sub.T +0.89<S.sub.T <-0.001Y.sub.T +1.57when Y.sub.T is at least 1,200 kg/mm.sup.2,and-0.31<S.sub.T <0.37when Y.sub.T is greater than 1,200 kg/mm.sup.2, and (3) has a heat shrinkage percentage of 0.1% or less in the longitudinal direction when heat-treated under no load at 70.degree. C. for 1 hour.
    Type: Grant
    Filed: December 20, 1994
    Date of Patent: April 8, 1997
    Assignee: Teijin Limited
    Inventors: Takao Chujo, Masanori Nishiyama, Hisashi Hamano
  • Patent number: 5534323
    Abstract: Provided are a biaxially oriented base film formed from polyethylene-2,6-naphthalenedicarboxylate as a raw material and a high-density magnetic recording floppy disk using the same. The base film and the floppy disk are characteristic in that they inhibit vibration in the film surface and have excellent viscoelasticity thereby to accomplish a contact with a magnetic head under given conditions even when rotated at high speed.
    Type: Grant
    Filed: December 2, 1993
    Date of Patent: July 9, 1996
    Assignee: Teijin Limited
    Inventors: Takao Chuujou, Ieyasu Kobayashi, Hisashi Hamano, Masami Etchu
  • Patent number: 5470665
    Abstract: Provided is a biaxially oriented, unidirectionally long polyethylene-2,6-naphthalenedicarboxylate film having the following characteristic properties;(A) both the Young's modulus in the longitudinal direction and the Young's modulus in the transverse direction are at least 600 kg/mm.sup.2, and the Young's modulus in the longitudinal direction is greater than the Young's modulus in the transverse direction,(B) the heat shrinkage factor in the transverse direction when the film has been treated under no load at 105.degree. C. for 30 minutes is at least 1%, and(C) the surface roughness Ra of one surface of the film is up to 5 nm, anda magnetic recording tape obtained by forming a thin magnetic metal film on the above film undergoes no curling, has high coercive force, has excellent electromagnetic conversion characteristic and permits high-density recording for a long period of time.
    Type: Grant
    Filed: March 30, 1995
    Date of Patent: November 28, 1995
    Assignee: Teijin, Ltd.
    Inventors: Hisashi Hamano, Masahiro Hosoi, Ieyasu Kobayshi, Yasuhiro Saeki
  • Patent number: 5463015
    Abstract: There is provided a biaxially oriented polyester base film for a magnetic tape for use in a cassette for a digital audio tape recorder. The film has (a) a stress when the biaxially oriented polyester base film is extended in the longitudinal direction by 5% of at least 12 kg/mm.sup.2, (b) a residual extension in the longitudinal direction of 0.2% or less and a residual extension in the transverse direction of 0.3% or less, (c) a heat shrinkage in the longitudinal direction of 1.5% or less, (d) at least one surface of which has a surface roughness, Ra, of 25 nm or less, and (e) a film thickness of in the range of from 3 to 12 .mu.m. A magnetic tape for use in a cassette for a digital audio tape recorder is also provided.
    Type: Grant
    Filed: December 7, 1994
    Date of Patent: October 31, 1995
    Assignee: Teijin Ltd.
    Inventors: Takao Chujo, Hisashi Hamano, Masanori Nishiyama, Yasuhiro Saeki, Tatsuya Ogawa, Kouhei Endou
  • Patent number: 5439738
    Abstract: There is provided a biaxially oriented polyester base film for a magnetic tape for use in a cassette for a digital audio tape recorder. The film has (a) a stress when the biaxially oriented polyester base film is extended in the longitudinal direction by 5% of at least 12 kg/mm.sup.2, (b) a residual extension in the longitudinal direction of 0.2% or less and a residual extension in the transverse direction of 0.3% or less, (c) a heat shrinkage in the longitudinal direction of 1.5% or less, (d) at least one surface of which has a surface roughness, Ra, of 25 nm or less, and (e) a film thickness of in the range of from 3 to 12 .mu.m. A magnetic tape for use in a cassette for a digital audio tape recorder is also provided.
    Type: Grant
    Filed: July 14, 1994
    Date of Patent: August 8, 1995
    Assignee: Teijin Limited
    Inventors: Takao Chujo, Hisashi Hamano, Masanori Nishiyama, Yasuhiro Saeki, Tatsuya Ogawa, Kouhei Endou
  • Patent number: 5431983
    Abstract: A magnetic recording tape, in particular a VTR tape, comprising;(A) a substrate composed of a biaxially oriented polyethylene-2,6-naphthalate film of which(a) the Young' modulus in the longitudinal direction is at least 650 kg/mm.sup.2, the Young' modulus in a transverse direction is the same as, or greater than, the Young's modulus in the longitudinal direction,(b) the heat shrinkage in the transverse direction is in the range of 1.0 to 3.0% when treated at 100.degree. C. for 30 minutes,(c) the surface roughness, Ra, is not more than 0.005 .mu.m, and(d) the amount of bled-out oligomer is not more than 0.01 area % when treated in air at 160.degree. C. for 5 minutes,(B) a thin magnetic metal layer having a thickness of 100 to 1,500 nm and formed on one surface of the substrate, and(C) a lubricant-containing thin organic polymer layer having a thickness of not more than 1 .mu.
    Type: Grant
    Filed: August 10, 1994
    Date of Patent: July 11, 1995
    Assignee: Teijin Limited
    Inventors: Masami Etchu, Hisashi Hamano, Masahiro Hosoi, Ieyasu Kobayashi, Yasuhiro Saeki
  • Patent number: 5415930
    Abstract: A biaxially oriented, unidirectionally long polyethylene-2,6-naphthalate film,(A) which contains(a) 0.05 to 0.4% by weight of first inert solid particles having an average particle diameter of 0.05 to 0.3 .mu.m, and(b) 0.005 to 0.05% by weight of second inert solid particles having an average particle diameter of 0.3 to 1.0 .mu.m, this average particle diameter being greater than the average particle diameter of the first inert solid particles by at least 0.2 .mu.m, wherein:(B) the Young's modulus in the length direction is at least 650 kg/mm.sup.2, the Young's modulus in the width direction is at least 600 kg/mm.sup.2, the Young's modulus in the length direction is greater than the Young's modulus in the width direction,(C) the heat shrinkage factor in the length direction in heat treatment at 70.degree. C. for 1 hour under no load is not more than 0.08%, and(D) the surface roughness, Ra, is 3 to 10 nm; and a magnetic tape obtained therefrom.
    Type: Grant
    Filed: January 14, 1994
    Date of Patent: May 16, 1995
    Assignee: Teijin Limited
    Inventors: Masami Etchu, Hisashi Hamano, Masahiro Hosoi, Yasuhiro Saeki
  • Patent number: 5380577
    Abstract: A biaxially oriented polyester film, (A) which is formed from polyethylene-2,6-naphthalenedicarboxylate containing 0.01 to 1% by weight of inert solid fine particles having an average particle size of 0.05 to 3 .mu.m, (B) which has a refractive index, in a film thickness direction, of at least 1.498, and (C) which has a Young's modulus, at least in one direction, of at least 700 kg/mm.sup.2 ; and a process for the production thereof. This film is useful as a magnetic recording medium, particularly as a base film excellent in abrasion resistance and tear resistance.
    Type: Grant
    Filed: June 10, 1994
    Date of Patent: January 10, 1995
    Assignee: Teijin Limited
    Inventors: Hisashi Hamano, Masahiro Hosoi, Ieyasu Kobayashi, Yasuhiro Saeki
  • Patent number: 5362571
    Abstract: There is provided a biaxially oriented polyester base film for a magnetic tape for use in a cassette for a digital audio tape recorder. The film has (a) a stress when the biaxially oriented polyester base film is extended in the longitudinal direction by 5% of at least 12 kg/mm.sup.2, (b) a residual extension in the longitudinal direction of 0.2 % or less and a residual extension in the transverse direction of 0.3% or less, (c) a heat shrinkage in the longitudinal direction of 1.5% or less, (d) at least one surface of which has a surface roughness, Ra, of 25 nm or less, and (e) a film thickness of in the range of from 3 to 12 .mu. m. A magnetic tape for use in a cassette for a digital audio tape recorder is also provided.
    Type: Grant
    Filed: March 16, 1994
    Date of Patent: November 8, 1994
    Assignee: Teijin Limited
    Inventors: Takao Chujo, Hisashi Hamano, Masanori Nishiyama, Yasuhiro Saeki, Tatsuya Ogawa, Kouhei Endou
  • Patent number: 5352534
    Abstract: An oriented polyester film (A) which comprises modified polyethylene-2,6-naphthalenedicarboxylate containing a 4,4'-diphenyldicarboxylic acid component and having a heat of crystallization of 16 to 25.5 Joule/g, and (B) which is biaxially oriented; and an oriented polyester film (A') which comprises modified polyethylene-2,6-naphthalenedicarboxylate containing of a glycol component derived from a compound represented by the following formula, ##STR1## wherein each of n and m is independently a positive number of 1 to 9 as an average, provided that m+n equals 2 to 9 as an average, and having a heat of crystallization of 6 to 20 Joule/g, and (B) which is biaxially oriented. These films are useful as a base film for a magnetic recording tape or as an electric insulation film.
    Type: Grant
    Filed: March 1, 1994
    Date of Patent: October 4, 1994
    Assignee: Teijin Limited
    Inventors: Hisashi Hamano, Masahiro Hosoi, Masanori Nishiyama, Yasuhiro Saeki
  • Patent number: 5316823
    Abstract: A magnetic tape for audio cassettes wherein a magnetic layer is provided on base film characterized in that the a base film, is biaxially oriented polyethylene-2,6-naphthalate film having a Young's modulus in the longitudinal direction of 850 Kg/mm.sup.2 or more, a Young's modulus in the transverse direction of 550 Kg/mm.sup.2 or more a surface roughness Ra in the range of 0.015 to 0.040 .mu.m, and a thermal shrinkage rate in the longitudinal direction of 0.3% or less in a case where it was held at a temperature of 100.degree. C. for 1 hour.A magnetic tape for audio cassettes is provided which is capable of long-time recording and wherein deterioration of magnetic characteristics does not easily occur in use, storage and the like at a high temperature, for example in the open during summer or in cars, compared to conventional ones.
    Type: Grant
    Filed: February 12, 1992
    Date of Patent: May 31, 1994
    Assignee: Teijin Limited
    Inventors: Masami Etchu, Hisashi Hamano, Masahiro Hosoi, Yasuhiro Saeki
  • Patent number: 5312893
    Abstract: An oriented polyester film (A) which comprises modified polyethylene-2,6-naphthalenedicarboxylate containing a 4,4'-diphenyldicarboxylic acid component and having a heat of crystallization of 16 to 25.5 Joule/g, and (B) which is biaxially oriented; and an oriented polyester film (A') which comprises modified polyethylene-2,6-naphthalenedicarboxylate containing of a glycol component derived from a compound represented by the following formula, ##STR1## wherein each of n and m is independently a positive number of 1 to 9 as an average, provided that m+n equals 2 to 9 as an average and having a heat of crystallization of 6 to 20 Joule/g, and (B) which is biaxially oriented. These films are useful as a base film for a magnetic recording tape or as an electric insulation film.
    Type: Grant
    Filed: March 17, 1993
    Date of Patent: May 17, 1994
    Assignee: Teijin Limited
    Inventors: Hisashi Hamano, Masahiro Hosoi, Masanori Nishiyama, Yasuhiro Saeki
  • Patent number: 5112659
    Abstract: A rabbit for radiation formed of an aromatic polyester composed of ethylene-2,6-naphthalenedicarboxylate units as main recurring units and having an intrinsic viscosity of 0.45 to 0.90.
    Type: Grant
    Filed: April 18, 1990
    Date of Patent: May 12, 1992
    Assignee: Teijin Limited
    Inventors: Hideo Katoh, Masahiro Hosoi, Hisashi Hamano, Yasuhiko Saito
  • Patent number: 5051292
    Abstract: A biaxially oriented film of polyethylene-2,6-naphthalate having a Young's modulus of at least 650 kg/mm.sup.2 in a given direction on the film plane and a direction crossing it at right angles, the difference between the Young's moduli in the two directions being at most 200 kg/mm.sup.2, the difference between the thermal shrinkages in the two directions being 0 to 0.1%.
    Type: Grant
    Filed: January 31, 1990
    Date of Patent: September 24, 1991
    Assignee: Teijin Limited
    Inventors: Hideo Katoh, Hisashi Hamano, Masahiro Hosoi, Tatsuya Ogawa