Method and apparatus for forming articles with non-uniformly patterned coatings
A process for applying a coating material onto a substrate as a non-uniform patterned layer of coating material, the method including providing a first distribution manifold having a cavity and a first multiplicity of dispensing outlets in fluid communication with the cavity, providing a second distribution manifold having a cavity and a second multiplicity of dispensing outlets in fluid communication with the cavity, creating relative motion between a substrate and the dispensing outlets in a first direction, dispensing a first coating material from the first dispensing outlets while maintaining the relative motion and simultaneously translating the plurality of dispensing outlets in a second direction non-parallel to the first direction, and dispensing a second coating material from the second dispensing outlets while maintaining the relative motion and simultaneously translating the plurality of dispensing outlets in a second direction non-parallel to the first direction. Useful non-uniformly patterned coated articles can be prepared using the process.
1. A method of applying a coating material to a substrate to produce a pre-determined pattern of the coating material on the substrate, comprising:
providing a first distribution manifold having a cavity and a first plurality of dispensing outlets in fluid communication with the cavity;
providing a second distribution manifold having a cavity and a second plurality of dispensing outlets in fluid communication with the cavity, wherein the second plurality of dispensing outlets is interleaved with the first plurality of dispensing outlets; and
creating relative motion between a substrate and the first and second plurality of dispensing outlets in a first direction;
dispensing a first coating material from the first plurality of dispensing outlets onto the substrate in a predetermined pattern while maintaining the relative motion, and simultaneously translating the first plurality of dispensing outlets in a second direction non-parallel to the first direction; and
dispensing a second coating material from the second plurality of dispensing outlets onto the substrate in a predetermined pattern while maintaining the relative motion, and simultaneously translating the second plurality of dispensing outlets in a direction non-parallel to the first direction.
2. The method according to claim 1 wherein the first plurality of dispensing outlets are translated in a third direction non-parallel to the first direction and non-parallel to the second direction while dispensing coating material from the first plurality of dispensing outlets.
3. The method according to claim 2 wherein the second plurality of dispensing outlets are translated in a direction non-parallel to the first direction and non-parallel to the second direction while dispensing coating material from the second plurality of dispensing outlets.
4. The method according to claim 2 wherein the second and third directions are substantially orthogonal to each other.
5. The method according to claim 2 wherein the first direction is a machine direction, and the second direction is a cross direction.
6. The method according to claim 5 , wherein the third direction is substantially orthogonal to a major surface of the substrate.
7. The method according to claim 1 wherein the first and second coating materials are different materials.