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:
Apr. 08, 2025
Filed:
Oct. 29, 2019
Billerudkorsnas Ab, Solna, SE;
Ali Naderi, Arboga, SE;
Billerudkorsnas AB, Solna, SE;
Abstract
There is provided a packaging material comprising a fibre based substrate and a gas barrier layer based on a polyvinyl alcohol (PVOH), wherein said gas barrier layer comprises an interpolymer complex forming agent (IPCFA), which IPCFA is a water-soluble polymer exhibiting functional groups capable of forming hydrogen bonds with —OH groups of the PVOH. Said PVOH has a weight average molecular weight (M) measured according to ASTM D4001-13 in the range of about 80 kg/mol to 135 kg/mol, the proportion of said IPCFA to PVOH in said gas barrier layer is in the range of 0.5 to 7.0% (w/w) and said packaging material has an oxygen permeability (OP) below 14 ml μm/mday atm, which OP is obtained by multiplying the oxygen transmission rate (OTR) of the packaging material measured according to ASTM F1927-7 at a relative humidity (RH) of 80% and 23° C. by the thickness of the gas barrier layer.