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:
Jun. 10, 2025
Filed:
Jan. 13, 2022
Applicant:
Kuraray Co., Ltd., Okayama, JP;
Inventors:
Assignee:
KURARAY CO., LTD., Okayama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B65D 65/46 (2006.01); B29C 41/00 (2006.01); B29C 41/46 (2006.01); B29K 31/00 (2006.01); B29L 7/00 (2006.01); C08J 5/18 (2006.01);
U.S. Cl.
CPC ...
B65D 65/46 (2013.01); B29C 41/003 (2013.01); B29C 41/46 (2013.01); C08J 5/18 (2013.01); B29K 2031/04 (2013.01); B29K 2995/0062 (2013.01); B29L 2007/008 (2013.01); C08J 2329/04 (2013.01);
Abstract
There is provided a water-soluble film containing polyvinyl alcohol resin, wherein a ratio RSm (LD/TD) is 1.2 or greater and 2.5 or less, where the RSm (LD/TD) is the ratio of an average length RSm (LD) of roughness curve elements on at least one film surface in the longitudinal direction to an average length RSm (TD) of roughness curve elements on the same film surface in the transverse direction. This allows provision of a water-soluble film that can be suitably used for manufacturing a package with excellent uniformity of seal strength, even for manufacturing a package with excellent uniformity of seal strength during high-speed sealing; and a package using the film.