公开(公告)号：US10472150B2

公开(公告)日：2019-11-12

申请号：US15208352

申请日：2016-07-12

Applicant: R.J. Reynolds Tobacco Products

Inventor： Andries Don Sebastian ,  Sami Ilmari Sneck ,  Mikko Juhani Söderlund

IPC: A24F15/00 ,  B65D85/10 ,  B65D85/12 ,  B65D65/02 ,  B65D65/40 ,  C23C16/06 ,  C23C16/455 ,  B65D25/36 ,  C23C16/40

Abstract: Provided herein is a moisture barrier film for packaging, such as tobacco or cigarette packaging. The film comprises polylactic acid (“PLA”) that is both biodegradable and transparent. The film includes multiple layers of PLA, with a base layer having a relatively high melting point compared to two outer layers, which have a relatively low melting point. The outer layers provide heat sealing capabilities to the film. The film is coated with a metal oxide layer comprised of aluminum oxide, titanium oxide, and/or aluminum-titanium oxide using an atomic layer deposition (“ALD”) coating method. The ALD coating to the PLA film results in a moisture transmission rate of less than 4 g/m2/day after the film has been subjected to creasing, which induces cracking of the ALD metal oxide layer.

公开(公告)号：US20180016070A1

公开(公告)日：2018-01-18

申请号：US15208352

申请日：2016-07-12

Applicant: R.J. Reynolds Tobacco Products

Inventor： Andries Don Sebastian ,  Sami Ilmari Sneck ,  Mikko Juhani Söderlund

IPC: B65D65/02 ,  B65D85/10 ,  A24F15/00 ,  B65D65/40 ,  C23C16/455 ,  C23C16/06

Abstract: Provided herein is a moisture barrier film for packaging, such as tobacco or cigarette packaging. The film comprises polylactic acid (“PLA”) that is both biodegradable and transparent. The film includes multiple layers of PLA, with a base layer having a relatively high melting point compared to two outer layers, which have a relatively low melting point. The outer layers provide heat sealing capabilities to the film. The film is coated with a metal oxide layer comprised of aluminum oxide, titanium oxide, and/or aluminum-titanium oxide using an atomic layer deposition (“ALD”) coating method. The ALD coating to the PLA film results in a moisture transmission rate of less than 4 g/m2/day after the film has been subjected to creasing, which induces cracking of the ALD metal oxide layer.