Method and apparatus of slot die coating over deformable back-up roll
Assignee3M Innovative Properties Company
InventorsShawn C. Dodds, Tyler J. Rattray, Kara A. Meyers, Mikhail L. Pekurovsky, Scott L. Ciliske, James N. Dobbs, Samad Javid
Life of this patent
Estimating the term…
Abstract
Methods and apparatuses for applying coatings (9) on a moving web (3) are provided. A slot die (20) and a back-up roll (11) engage with each other. The back-up roll has a deformable inner layer (12) with a surface thereof covered by a deformable outer layer (14). The slot die and the flexible web at a contacting area are impressed into the back-up roll with an engagement depth D, which enables formation of a coating having a substantially uniform thickness.
Claims20
A method of applying a coating onto a web, the method comprising:
- providing a back-up roll having a deformable inner layer with a surface thereof covered by a deformable outer layer, the inner layer being softer than the outer layer;
- providing a slot die having one or more die lips extending along a cross direction, the one or more die lips being positioned proximate to the back-up roll;
- disposing a flexible web between the back-up roll and the one or more die lips;
- dispensing a liquid coating material from the slot die onto the flexible web,
- wherein the flexible web at a contacting area is impressed into the back-up roll with an engagement depth D.
A coating apparatus comprising:
- a back-up roll having a deformable inner layer with a surface thereof covered by a deformable outer layer, the inner layer being softer than the outer layer;
- a slot die having one or more die lips extending along a cross direction, the one or more die lips being positioned proximate to the back-up roll;
- and
- a flexible web disposed between the back-up roll and the slot die,
- wherein the flexible web at a contacting area is impressed into the back-up roll with an engagement depth D, and the slot die is configured to dispense a liquid coating material onto the web.
Dependencies are inferred from the claim text.