Patents by Inventor Yasushi Itaba
Yasushi Itaba 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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Patent number: 5227233Abstract: A label comprising a polyethylene film in which the degree of crosslinking inwardly decreases across the thickness of the film and on one side of which printing is performed, and an adhesive layer further formed thereon. The label is good in clarity, is possible to perform back surface printing, can provide an integral feeling and a high-class feeling as if curved-surface printing is performed on a cylindrical container itself, is sufficient in rigidity and strength and therefore is possible to be thinly formed, is resistant to water wetting and contamination, is unnecessary to be stripped in recovering and recycling a polyethylene bottle when the label is stuck thereon, can be stuck on the bottle concurrently with blow molding of the bottle printed, and is therefore suitable for use as a label for in-molding.Type: GrantFiled: November 6, 1991Date of Patent: July 13, 1993Assignee: Tonen Chemical CorporationInventors: Yasushi Itaba, Yutaka Yoshifuji
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Patent number: 5185203Abstract: Disclosed are a heat-sealable crosslinked oriented polyethylene film having low-temperature heat sealabilitiy which enables high-speed bag making, improved in antiblocking property and excellent in clarity and moistureproofness, comprising a crosslinked, biaxially oriented high density polyethylene film in which the degree of crosslinking inwardly decreases across the thickness of the film, and a heat sealing layer placed thereon, the heat sealing layer being composed of a tackifier and an ethylene-vinyl acetate copolymer containing an antiblocking agent or composed of 1,2-polybutadiene containing an antiblocking agent, preferably further comprising a heat sealing layer free from an antiblocking agent placed between the biaxially oriented film and the heat sealing layer containing the antiblocking agent, and a process for the production of the same.Type: GrantFiled: November 14, 1989Date of Patent: February 9, 1993Assignee: Tonen Sekiyukagaku K.K.Inventors: Yasushi Itaba, Minoru Izawa, Keichiro Saito, Takayoshi Kondo
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Patent number: 5145728Abstract: An oriented polyethylene film with an excellent moistureproofness and optical property is provided in which the degree of crosslinking is uniform or decreases inwardly across the thickness of the film, and which consists of a composition comprising (A) 50 to 90% by weight of polyethylene with a density of at least 0.935 g/cm.sup.3 and a high load melt index to melt index ratio of at most 100 and (B) 50 to 10% by weight of a petroleum resin or linear low density polyethylene.Type: GrantFiled: June 12, 1991Date of Patent: September 8, 1992Assignee: Toa Nenryo Kogyo Kabushiki KaishaInventors: Yasushi Itaba, Yutaka Yoshifuji, Takayoshi Kondo, Keichiro Saitoh, Tadao Yoshino, Minoru Izawa, Ichiro Sakamoto
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Patent number: 5045620Abstract: Disclosed are oriented polyethylene films having specific elongation and strength, which are excellent in linear tearability and clear tearability, suitably used for packaging and produced by longitudinally stretching a polyethylene resin sheet in which the degree of crosslinking inwardly decreases across the thickness thereof at a draw ratio of at least 5 times at a temperature of not higher than the melting point of a polyethylene resin forming the polyethylene resin sheet, and laterally stretching said sheet 4 to 8 times at a temperature ranging from above the melting point of the polyethylene resin up to 10.degree. C. higher than the melting point thereof.Type: GrantFiled: September 7, 1989Date of Patent: September 3, 1991Assignee: Tonen Sekiyukagaku K.K.Inventors: Yasushi Itaba, Yutaka Yoshifuji, Takayoshi Kondo, Ichiro Sakamoto
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Patent number: 5043204Abstract: An oriented polyethylene film with an excellent moistureproofness and optical property is provided in which the degree of crosslinking is uniform or decreases inwardly across the thickness of the film, and which consists of a composition comprising (A) 50 to 90% by weight of polyethylene with a density of at least 0.935 g/cm.sup.3 and a high load melt index to melt index ratio of at most 100 and (B) 50 to 10% by weight of a petroleum resin or linear low density polyethylene.Type: GrantFiled: November 30, 1988Date of Patent: August 27, 1991Assignee: TOA Nenryo Kogyo Kabushiki KaishaInventors: Yasushi Itaba, Yutaka Yoshifuji, Takayoshi Kondo, Keichiro Saitoh, Tadao Yoshino, Minoru Izawa, Ichiro Sakamoto
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Patent number: 5006378Abstract: A polyethylene composite film suitable for packaging, which is superior in moistureproofness, flex-o-crack resistance, tearability and heat-sealing property, is provided comprising an oriented polyethylene film such that the degree of cross-linking inwardly decreases across the thickness of the film and at least one lamination layer, provided on one side of the oriented polyethylene film consisting of a lamination material having a heat shrinkage of less than 5% at 120.degree. C.Type: GrantFiled: November 8, 1988Date of Patent: April 9, 1991Assignee: Toa Neryo Kogyo Kabushiki KaishaInventors: Yasushi Itaba, Yutaka Yoshifuji, Takayoshi Kondo, Minoru Izawa, Ichiro Sakamoto, Tadao Yoshino
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Patent number: 4891173Abstract: A crosslinked and oriented polyethylene film superior in clarity as well as moistureproofness and having an improved stretchability is produced by a process for producing a crosslinked and oriented polyethylene film such that the degree of crosslinking inwardly decreases across the thickness of the film, comprising using a polyethylene having a density of at least 0.935 g/cm.sup.3, a melt index of 0.5 to 20 g/10 min and a high-load melt index to melt index ratio of 40 to 200.Type: GrantFiled: September 8, 1988Date of Patent: January 2, 1990Assignee: Toa Nenryo Kogyo Kabushiki KaishaInventors: Keichiro Saitoh, Yasushi Itaba, Minoru Izawa, Tadao Yoshino
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Patent number: 4705714Abstract: An oriented film is prepared by crosslinking a sheet of HDPE to provide maximum crosslinking at the surfaces of the sheet and minimum orientation at its middle layer portion, and thereafter heating and stretching the film to obtain an oriented HDPE of high clarity film of improved moisture proof.Type: GrantFiled: March 6, 1986Date of Patent: November 10, 1987Assignee: Toa Nenryo Kogyo K.K.Inventors: Yasushi Itaba, Keichiro Saito, Jyoichi Tabuchi, Masao Yoshizawa
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Patent number: 4673619Abstract: An oriented film is prepared by crosslinking a sheet of polyethylene (preferably HDPE) containing particulate inorganic slip and antiblock additions to provide maximum crosslinking at the surfaces of the sheet and minimum orientation at its middle layer portion, and thereafter heating and stretching the film to obtain an oriented HDPE of high clarity film of improved moisture proof.Type: GrantFiled: August 15, 1986Date of Patent: June 16, 1987Assignee: Toa Nenryo Kabushiki KaishaInventors: Yasushi Itaba, Tadao Yoshino, Yutaka Yoshifuji, Keichiro Saito, Jyoichi Tabuchi
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Patent number: 4636340Abstract: An oriented film is prepared by crosslinking a sheet of polyethylene (preferably HDPE) containing particulate inorganic slip and antiblock additions to provide maximum crosslinking at the surfaces of the sheet and minimum orientation at its middle layer portion, and thereafter heating and stretching the film to obtain an oriented HDPE of high clarity film of improved moisture proof.Type: GrantFiled: December 18, 1984Date of Patent: January 13, 1987Assignee: Toa Nenryo Kogyo Kabushiki KaishaInventors: Yasushi Itaba, Tadao Yoshino, Yutaka Yoshifuji, Keichiro Saito, Jyoichi Tabuchi
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Patent number: 4590020Abstract: An oriented film is prepared by crosslinking a sheet of HDPE to provide maximum crosslinking at the surfaces of the sheet and minimum orientation at its middle layer portion, and thereafter heating and stretching the film to obtain an oriented HDPE of high clarity film of improved moisture proof.Type: GrantFiled: March 22, 1984Date of Patent: May 20, 1986Assignee: Toa Nenryo Kogyo Kabushiki KaishaInventors: Yasushi Itaba, Keichiro Saito, Jyoichi Tabuchi, Masao Yoshizawa