Sterilizable film composite for packaging purposes
US6517932B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 10, 2001 |
| Grant date | Feb 11, 2003 |
| Priority date | — |
| Expiry date | Aug 10, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The invention relates to a film composite for packaging purposes. Said film composite efficiently blocks the passage of water vapor and gas after sterilization in a water bath or in water vapor at temperatures of more than 90° C., and comprises a film consisting of polyethylene terephthalate (PET) with a coextruded layer consisting of polyethylene-2,6-naphthalate (PEN) on at least one side. The film has a 10 nm to 200 nm thick ceramic layer on at least one of the sides that are coated with PEN, said layer being produced by vaporizing aluminium while supplying oxygen or by vaporizing silicon monoxide (SiO), optionally while supplying oxygen, in a vacuum. The layer consists of Al2O3 or SiOx, x being a number between 0.9 and 2. The composite film blocks the passage of water vapor and gases to a large extent after sterilization in a water bath or in water vapor at temperatures of more than 90° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.