	US 11,806,971 B2
	Extrudable antifog copolyester heat seal resins
Deepa Puthanparambil, Wauwatosa, WI (US)
Assigned to Bostik, Inc., Wauwatosa, WI (US)
Filed by Bostik, Inc., Wauwatosa, WI (US)
Filed on Feb. 7, 2022, as Appl. No. 17/665,720.
Application 17/665,720 is a continuation of application No. 16/474,126, granted, now 11,273,627, previously published as PCT/US2018/013114, filed on Jan. 10, 2018.
Claims priority of provisional application 62/444,971, filed on Jan. 11, 2017.
Prior Publication US 2022/0153004 A1, May 19, 2022
Int. Cl. B32B 27/20 (2006.01); B29C 48/08 (2019.01); B29C 48/40 (2019.01); B32B 27/36 (2006.01); B32B 37/15 (2006.01); B29C 48/00 (2019.01); B29C 48/21 (2019.01); B29C 48/28 (2019.01); B29D 7/01 (2006.01); B32B 37/06 (2006.01); B29K 67/00 (2006.01); B29K 105/00 (2006.01)

CPC B32B 27/20 (2013.01) [B29C 48/022 (2019.02); B29C 48/08 (2019.02); B29C 48/21 (2019.02); B29C 48/28 (2019.02); B29C 48/40 (2019.02); B29D 7/01 (2013.01); B32B 27/36 (2013.01); B32B 37/153 (2013.01); B29K 2067/00 (2013.01); B29K 2105/0005 (2013.01); B29K 2995/0026 (2013.01); B32B 37/06 (2013.01); B32B 2250/02 (2013.01); B32B 2255/10 (2013.01); B32B 2264/102 (2013.01); B32B 2307/744 (2013.01); B32B 2367/00 (2013.01); B32B 2377/00 (2013.01); B32B 2439/70 (2013.01)]

9 Claims

1. A method of making a laminate comprising the steps of:

forming a heat seal resin composition by mixing a copolyester resin component, an antifog additive, and an anti-block and slip additive in the absence of a solvent, wherein the copolyester resin comprises a blend of a semi-crystalline copolyester resin and an amorphous copolyester resin;

applying the heat seal resin composition to a film-forming compound, such as polyester, or a film, such as a polyester film, to form the laminate, wherein no solvent is added to the heat seal resin composition before or during the applying step.