US 11,913,173 B2
Biodegradable and recyclable barrier paper laminate
Emily Charlotte Boswell, Cincinnati, OH (US); Uwe Bolz, Tutzing (DE); Patti Jean Kellett, Cincinnati, OH (US); James Terry Knapmeyer, Cincinnati, OH (US); Pier-Lorenzo Caruso, Frankfurt am Main (DE); Lee Mathew Arent, Fairfield, OH (US); John Moncrief Layman, Liberty Township, OH (US); and Jack Alan Hunter, Springboro, OH (US)
Assigned to The Procter & Gamble Company, Cincinnati, OH (US)
Filed by The Procter & Gamble Company, Cincinnati, OH (US)
Filed on Oct. 7, 2021, as Appl. No. 17/495,832.
Claims priority of provisional application 63/089,595, filed on Oct. 9, 2020.
Prior Publication US 2022/0112663 A1, Apr. 14, 2022
Int. Cl. D21H 19/14 (2006.01)
CPC D21H 19/14 (2013.01) 18 Claims
 
1. A biodegradable and recyclable barrier paper laminate comprising:
a) a biodegradable and recyclable paper layer having an outer surface and an inner surface;
b) a first biodegradable polymeric layer having an outer surface and an inner surface, said outer surface disposed on said inner surface of said biodegradable and recyclable paper layer;
c) a first biodegradable primer layer having an outer surface and an inner surface, said outer surface disposed on said inner surface of said biodegradable polymeric layer;
d) An inorganic barrier layer having an outer surface and an inner surface, said outer surface disposed on said inner surface of said biodegradable primer layer; wherein the inorganic barrier layer comprises at least one of aluminum, aluminum oxide or silicon oxide;
e) a second biodegradable primer layer having an outer surface and an inner surface, said inner surface disposed on said inner surface of said inorganic barrier layer;
f) a second biodegradable polymeric layer having an outer surface and an inner surface, said inner surface disposed on said outer surface of said biodegradable primer layer and which acts as a heat seal layer;
wherein the biodegradable and recyclable barrier paper laminate is recyclable and exhibits a recyclable percentage of at least 50 percent, as determined by test method PTS-RH:021/97 (Draft October 2019); and
wherein the biodegradable and recyclable barrier paper laminate has at least 60% biodegradation within 60 days in the OECD 301B test.