US 12,084,814 B2
Compostable paperboard structure and method for manufacturing the same
Chitai C. Yang, Mechanicsville, VA (US); Rahul Bhardwaj, Glen Allen, VA (US); and Chester E. Alkiewicz, Glen Allen, VA (US)
Assigned to WestRock MWV, LLC, Atlanta, GA (US)
Appl. No. 17/631,489
Filed by WestRock MWV, LLC, Atlanta, GA (US)
PCT Filed Jun. 10, 2020, PCT No. PCT/US2020/036975
§ 371(c)(1), (2) Date Jan. 30, 2022,
PCT Pub. No. WO2021/021319, PCT Pub. Date Feb. 4, 2021.
Claims priority of provisional application 62/880,229, filed on Jul. 30, 2019.
Prior Publication US 2022/0275585 A1, Sep. 1, 2022
Int. Cl. D21J 1/08 (2006.01); D21H 17/66 (2006.01); D21H 19/40 (2006.01); D21H 19/42 (2006.01); D21H 19/62 (2006.01)
CPC D21J 1/08 (2013.01) [D21H 17/66 (2013.01); D21H 19/40 (2013.01); D21H 19/42 (2013.01); D21H 19/62 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A paperboard structure comprising:
a paperboard substrate comprising a first major side and a second major side opposed from said first major side; and
a coating layer on said first major side, said coating layer comprising a polymer and filler, wherein said polymer is a semi-crystalline polymer consisting essentially of at least one of poly(butylene succinate) and poly(butylene succinate-co-adipate).