Hollow containers with inert or impermeable inner surface through plasma-assisted surface reaction or on-surface polymerization
US6276296A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 8, 1998 |
| Grant date | Aug 21, 2001 |
| Priority date | — |
| Expiry date | Jul 8, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C16/045
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Plasma assisted polymerization and deposition of a very thin inner surface coating in a plastic or metal container without an undesirable increase in container surface temperature is provided to change the surface properties of the internal plastic surface of a container by reaction of the surface with a reactive gas which has been energized to produce a plasma or the surface is activated by a plasma of reactive gas so that it becomes receptive to a further surface reaction. It involves locating the container in an enclosure, inserting means for feeding a reactant gas into the container, selectively controlling the pressure inside the enclosure and inside of the container, cleaning a surface of the container to be coated in situ, pretreating the surface to be coated for enabling a polymer coating subsequently deposited thereon to secure proper adhesion between the coating material and the container material, feeding a reactant gas of predetermined constituency and having barrier properties into the container, generating a plasma of said reactant gas and depositing a relatively thin polymer coating on the surface to be coated, and performing a post polymerization treatment on said p…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.