Ultraviolet light absorbing and transparent packaging laminate
US5489022A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 19, 1994 |
| Grant date | Feb 6, 1996 |
| Priority date | — |
| Expiry date | Apr 19, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/3154
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A transparent packaging laminate (10) for use in a container (15) for protecting medical products (18) from oxidation and deterioration as a result of exposure to ultraviolet light. The laminate includes a first transparent film (11) of a polyethylene material laminated with a polyester adhesive (13) to a second transparent film (12) of a polyester material. The transparent polyethylene material has a water vapor transmission rate of less than 20 grams/m.sup.2 /24 hours. The transparent polyester material absorbs ultraviolet light having a wavelength in a range of from 285 to 358 nanometers and has a water vapor transmission rate greater than 20 grams/m.sup.2 /24 hours, whereby the resulting laminate is unexpectedly wrinkle-free after ethylene oxide sterilization. The container comprises the ultraviolet light absorbing laminate and a sheet of spun-bonded olefin material attached to the laminate, which is opaque to ultraviolet light and forms a cavity (17) therebetween with the laminate for containing a medical product therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.