Humidity control insert for cigarette packs

摘要

Provided herein is a humidity control insert for packages such as cigarette packs. The humidity control insert comprises a porous nonwoven fibrous substrate and a hygroscopic powder material dispersed within the porous nonwoven fibrous substrate. Further provided is a package, such as a cigarette pack, comprising the humidity control insert, wherein the humidity control insert is adapted to release moisture retained therein into an internal air space of the cigarette pack.

主权项

1. A humidity control insert for a package, comprising a porous nonwoven fibrous substrate and a hygroscopic powder material dispersed within the porous nonwoven fibrous substrate,
wherein the humidity control insert is obtained by dispersing the hygroscopic powder material into the porous nonwoven fibrous substrate by a dry powder impregnation process; heating and compacting the porous nonwoven fibrous substrate to immobilize the hygroscopic powder material; and retaining moisture into the porous nonwoven fibrous substrate dispersed with the hygroscopic powder material, and wherein the hygroscopic powder material accounts for 1-50. wt. % of the dry weight of humidity control insert.