BARRIER PAPER PACKAGING AND PROCESS FOR PRODUCTION THEREOF Russian patent published in 2018 - IPC B32B37/02 B32B29/06 

FIELD: package and storage.

SUBSTANCE: invention relates to a paper bag with barrier properties and a method for manufacturing same. Paper-based composite packaging structure comprises a paper layer and a polyglycolic acid (PGA) filler layer that can be laminated or otherwise adhered to a paper layer to smooth the surface of the paper layer. In some embodiments, the filler layer comprises a polymer or a bio-based polymer. Optional barrier layer may be deposited on one side of the paper layer or filler layer as desired to provide functional barrier characteristics. Composite paper-based film structure(s) may comprise additional layers such as one or more optional primer layers, adhesive layers, ink layers, and/or sealant layers that can be incorporated into the composite film structure as desired to enable the required functional characteristics of the composite film structure described herein.

EFFECT: invention provides a paper-based composite packaging structure that is compostable and/or recyclable and maintains the desirable barrier properties as both the paper and the bio-based polymer filler layers will break down under composting conditions and/or meet standardised recyclability requirements.

23 cl, 3 dwg, 7 tbl, 2 ex