Method for thermoforming a film by thermal shrinkage and lamination thereof on an optical article
AssigneeEssilor International
InventorsJia Mei SOON, Sébastien HENRION, Jeanne MARCHAL
Life of this patent
Estimating the term…
Abstract
A method comprising providing an article having a non-zero radius of curvature and a thermoplastic film, moving relatively to each other said thermoplastic film and said article to bring them into contact, applying heat to the thermoplastic film so that the heated thermoplastic film shrinks and takes the shape and curvature of the article, resulting in a thermoformed thermoplastic film, and optionally laminating said thermoformed thermoplastic film on a surface of an optical article by means of a layer of adhesive, said layer of adhesive being positioned between the optical article and the thermoplastic film.
Claims18
-15. (canceled)
A process comprising the following successive steps:
- a) providing a thermoplastic film and an article having a non-zero radius of curvature,
- b) moving relatively to each other said thermoplastic film and said article to bring them into contact,
- c) applying heat to the thermoplastic film so that the heated thermoplastic film shrinks and takes the shape and curvature of the article, resulting in a thermoformed thermoplastic film.
Dependencies are inferred from the claim text.