Patents by Inventor Nobuyasu Okumura
Nobuyasu Okumura 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: 20230272176Abstract: The objective of the present invention is to provide a stretched polyamide film which is excellent in laminatability, lamination strength, mechanical properties and shock resistance property and which has effects to prevent goods being broken and protect a content from vibration and shock at the time of transportation when used a various packaging materials. The present invention relates to a stretched polyamide film, wherein a main constituent is nylon 6; at least one surface layer meets the following conditions (1) and (2); and the stretched polyamide film meets the following condition (3): (1) a relaxation degree of a surface layer orientation measured by IR spectroscopy is within a range of not less than 0.3 and not more than 0.5; (2) a crystallization degree of a surface layer measured by IR spectroscopy is within a range of not less than 1.0 and not more than 1.4; (3) a heat shrinkage rate (%) in TD direction at 160° C. for 10 minutes is within a range of not less than 0.6 and not more than 4.Type: ApplicationFiled: November 16, 2021Publication date: August 31, 2023Applicant: UNITIKA LTD.Inventors: Takashi Okabe, Nobuyasu Okumura, Kumi Ashihara
-
Publication number: 20220056229Abstract: A laminated film having a resin layer laminated on at least one surface of a base film. The laminated film is characterized by: the base film being a semi-aromatic polyamide film that has been at least uniaxially stretched; the resin layer having a thickness of 0.03 to 0.5 ?m; and the close adhesion between the base film and the resin layer, according to the cross-cut method described in JIS K 5600, being 95% or more.Type: ApplicationFiled: February 19, 2020Publication date: February 24, 2022Applicant: UNITIKA LTD.Inventors: Takashi Okabe, Nobuyasu Okumura, Masafumi Yamamoto, Kumi Ashihara, Midori Shimomura, Yoshimi Ueno
-
Patent number: 11040515Abstract: There is provided a release film comprising a substrate film and a resin layer provided on at least one surface of a substrate film, wherein the resin layer comprises 100 parts by mass of an acid-modified polyolefin resin, 1 to 20 parts by mass of a crosslinking agent and 10 to 1,000 parts by mass of a polyvinyl alcohol having a saponification rate of 99% or lower.Type: GrantFiled: September 20, 2017Date of Patent: June 22, 2021Assignee: Unitika Ltd.Inventors: Mari Shimizu, Kouhei Tanaka, Nobuyasu Okumura
-
Publication number: 20190224945Abstract: There is provided a release film comprising a substrate film and a resin layer provided on at least one surface of a substrate film, wherein the resin layer comprises 100 parts by mass of an acid-modified polyolefin resin, 1 to 20 parts by mass of a crosslinking agent and 10 to 1,000 parts by mass of a polyvinyl alcohol having a saponification rate of 99% or lower.Type: ApplicationFiled: September 20, 2017Publication date: July 25, 2019Applicant: UNITIKA LTD.Inventors: Mari Shimizu, Kouhei Tanaka, Nobuyasu Okumura
-
Patent number: 10072143Abstract: Disclosed is an aqueous polyolefin resin dispersion including a polyolefin resin and an aqueous medium, wherein the polyolefin resin includes an olefin component and an unsaturated carboxylic acid component as copolymer components; the olefin component includes propylene (A) and an olefin(s) (B) other than propylene; the mass ratio (A/B) between the propylene (A) and the olefin(s) (B) other than propylene is 60/40 to 95/5; the content of the unsaturated carboxylic acid component as the copolymer component is 1 part by mass or more in relation to 100 parts by mass of the total mass of (A) and (B); and the content of the unsaturated carboxylic acid monomer in the dry residue of the aqueous dispersion is 10,000 ppm or less.Type: GrantFiled: December 3, 2014Date of Patent: September 11, 2018Assignee: Unitika Ltd.Inventors: Haruki Ohfuji, Nobuyasu Okumura, Takuma Yano, Kenjin Shiba
-
Patent number: 9849653Abstract: The present invention provides a mold release film including a resin layer provided on one surface of a polyester film, wherein the resin layer includes 100 parts by mass of a polypropylene-based modified polyolefin resin with the proportion of a modifying component of 1 to 10% by mass and 1 to 50 parts by mass of a cross-linking agent; the peel strength between the resin layer and a pressure-sensitive adhesive measured by bonding a rubber-based pressure-sensitive adhesive to the resin layer exceeds 3.0 N/cm; and the residual adhesion rate of a pressure-sensitive adhesive after bonding an acrylic pressure-sensitive adhesive to the resin layer is 80% or more.Type: GrantFiled: January 9, 2014Date of Patent: December 26, 2017Assignee: UNITIKA LTD.Inventors: Goro Araki, Nobuyasu Okumura, Yoshimi Ueno
-
Publication number: 20160280901Abstract: Disclosed is an aqueous polyolefin resin dispersion including a polyolefin resin and an aqueous medium, wherein the polyolefin resin includes an olefin component and an unsaturated carboxylic acid component as copolymer components; the olefin component includes propylene (A) and an olefin(s) (B) other than propylene; the mass ratio (A/B) between the propylene (A) and the olefin(s) (B) other than propylene is 60/40 to 95/5; the content of the unsaturated carboxylic acid component as the copolymer component is 1 part by mass or more in relation to 100 parts by mass of the total mass of (A) and (B); and the content of the unsaturated carboxylic acid monomer in the dry residue of the aqueous dispersion is 10,000 ppm or less.Type: ApplicationFiled: December 3, 2014Publication date: September 29, 2016Applicant: UNITIKA LTD.Inventors: Haruki Ohfuji, Nobuyasu Okumura, Takuma Yano, Kenjin Shiba
-
Publication number: 20150367610Abstract: The present invention provides a mold release film including a resin layer provided on one surface of a polyester film, wherein the resin layer includes 100 parts by mass of a polypropylene-based modified polyolefin resin with the proportion of a modifying component of 1 to 10% by mass and 1 to 50 parts by mass of a cross-linking agent; the peel strength between the resin layer and a pressure-sensitive adhesive measured by bonding a rubber-based pressure-sensitive adhesive to the resin layer exceeds 3.0 N/cm; and the residual adhesion rate of a pressure-sensitive adhesive after bonding an acrylic pressure-sensitive adhesive to the resin layer is 80% or more.Type: ApplicationFiled: January 9, 2014Publication date: December 24, 2015Applicant: UNITIKA LTD.Inventors: Goro Araki, Nobuyasu Okumura, Yoshimi Ueno
-
Patent number: 8535774Abstract: Disclosed is a release sheet including a substrate and a resin layer formed on the substrate. The resin layer includes: 100 parts by mass of an acid-modified polyolefin resin including an acid-modifying component in a content of 1 to 10% by mass; and 1 to 50 parts by mass of a crosslinking agent and/or 5 to 1000 parts by mass of polyvinyl alcohol. The crosslinking agent is composed of a carbodiimide compound and/or an oxazoline compound.Type: GrantFiled: March 13, 2008Date of Patent: September 17, 2013Assignee: Unitika Ltd.Inventors: Nobuyasu Okumura, Masafumi Yamada, Kenjin Shiba
-
Publication number: 20110151167Abstract: Disclosed is a release sheet including a substrate and a resin layer formed on the substrate. The resin layer includes: 100 parts by mass of an acid-modified polyolefin resin including an acid-modifying component in a content of 1 to 10% by mass; and 1 to 50 parts by mass of a crosslinking agent and/or 5 to 1000 parts by mass of polyvinyl alcohol. The crosslinking agent is composed of a carbodiimide compound and/or an oxazoline compound.Type: ApplicationFiled: March 13, 2008Publication date: June 23, 2011Applicant: UNITIKA LTD.Inventors: Nobuyasu Okumura, Masafumi Yamada, Kenjin Shiba