Moisture barriers for paper materials

US10420370B2 · kind B2 · utility

Assignee

• R.J. REYNOLDS TOBACCO PRODUCTS · US

Inventors

• Andries Don Sebastian · Clemmons, US
• Pankaj Patel · Clemmons, US
• Bruce Alan Bengtsson · Winston-Salem, US
• Stephanie A. Whittington · Kernersville, US
• Erkki Mikael Salo · Espoo, FI
• Tero Malm · Tampere, FI

Key dates

• Filing date: Nov 17, 2014
• Grant date: Sep 24, 2019
• Expiry date: Jul 17, 2037

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21H27/10
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

Provided herein is a tobacco packaging material, comprising a paper material coated with at least one polymer layer. The polymer layer comprises at least one repulpable polymer, and wherein the tobacco packaging material has a water vapor transmission rate (WVTR) that is at least 90% lower than the paper material. Further provided is a tobacco package comprising the tobacco packaging material, wherein the tobacco package is substantially free of any foil inner liner or polypropylene film. Further described is a method for making the tobacco packaging material, comprising extrusion coating at least one repulpable polymer onto a paper material to form a polymer layer, and optionally further depositing at least one atomic layer deposition (ALD) layer that comprises a metal oxide.