The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 11, 2020
Filed:
Aug. 14, 2019
Toyo Seikan Group Holdings, Ltd., Tokyo, JP;
Takuya Kashiwakura, Yokohama, JP;
Yuji Funagi, Yokohama, JP;
Tomohiro Miyai, Yokohama, JP;
Arata Sakuragi, Yokohama, JP;
TOYO SEIKAN GROUP HOLDINGS, LTD., Tokyo, JP;
Abstract
An organic resin-covered surface-treated metal sheet having formed on at least one surface of a metal sheet a surface-treatment coating and an organic resin film on the coating. The surface-treatment coating contains a polyvalent metal compound and a poly-carboxylic acid type polymer containing not less than 60 mol % constituent units derived from at least one polymerizable monomer selected from acrylic acid, maleic acid, methacrylic acid, and itaconic acid. The surface-treatment coating measured for its infrared-ray absorption spectra has a peak height ratio (β/α) of a maximum absorption peak height (α) in a wave number range of 1660 to 1760 cmand a maximum absorption peak height (β) in a wave number range of 1490 to 1659 cmis from 0.37 to 2.35. Also disclosed is a can body made from the organic resin-covered surface-treated metal sheet and a can lid made from the organic resin-covered surface-treated metal sheet.