Method of forming creped thin film-like structures from frothed chemistry
View Patent ↗A method is presented for forming a collapsed foam film-like structure, the method including positioning a composition applicator adjacent to a hot non-permeable dryer surface, producing a first frothed dispersion or frothed solution from a first dispersion or solution, applying the first frothed dispersion or frothed solution to the dryer surface, allowing the first frothed dispersion or frothed solution to convert to a collapsed foam film-like structure, and scraping the collapsed foam film-like structure from the dryer surface. The method can further include producing a second dispersion or solution, blending the first dispersion or solution and the second dispersion or solution, frothing the blended dispersion or solution, applying the blended frothed dispersion or frothed solution to the dryer surface, and allowing the frothed dispersion or frothed solution to convert to a collapsed foam film-like structure.
1. A method of forming a collapsed foam film-like structure, the method comprising:
a) positioning a composition applicator adjacent to a heated non-permeable dryer surface;
b) producing a first frothed dispersion or frothed solution from a first dispersion or solution;
c) applying the first frothed dispersion or frothed solution to the dryer surface;
d) allowing the first frothed dispersion or frothed solution to convert to a first collapsed foam film-like structure; and
e) scraping only the first collapsed foam film-like structure from the dryer surface.
2. The method of claim 1 , wherein the steps a-e are performed in sequential order.
3. The method of claim 1 , further comprising producing a second frothed dispersion or frothed solution from a second dispersion or solution, applying the second frothed dispersion or frothed solution to the applied first frothed dispersion or frothed solution, and allowing the second frothed dispersion or frothed solution to convert to a second collapsed foam film-like structure, wherein scraping includes scraping only the first and second collapsed foam film-like structures from the dryer surface.
4. The method of claim 3 , wherein the first frothed dispersion or frothed solution is allowed to convert to a collapsed foam film-like structure prior to applying the second frothed dispersion or frothed solution to the applied first frothed dispersion or frothed solution.
5. The method of claim 3 , further comprising producing a third frothed dispersion or frothed solution from a third dispersion or solution, applying the third frothed dispersion or frothed solution to the applied second frothed dispersion or frothed solution, and allowing the third frothed dispersion or frothed solution to convert to a third collapsed foam film-like structure, wherein scraping includes scraping only the first, second, and third collapsed foam film-like structures from the dryer surface.
6. The method of claim 1 , further comprising producing a second frothed dispersion or frothed solution from a second dispersion or solution, and blending the first frothed dispersion or frothed solution and the second frothed dispersion or frothed solution, wherein the applying step applies the blended frothed dispersion or frothed solution.
7. The method of claim 1 , further comprising blending a second dispersion or solution with the first dispersion or solution prior to frothing, wherein producing includes producing a blended frothed dispersion or frothed solution, wherein applying includes applying the blended frothed dispersion or frothed solution to the dryer surface, wherein allowing includes allowing the blended frothed dispersion or frothed solution to convert to a blended collapsed foam film-like structure, and wherein scraping includes scraping only the blended collapsed foam film-like structure from the dryer surface.
8. The method of claim 7 , further comprising producing a third frothed dispersion or frothed solution from a third dispersion or solution, and applying the third frothed dispersion or frothed solution to the applied blended first and second frothed dispersions or frothed solutions, and allowing the third frothed dispersion or frothed solution to convert to a collapsed foam film-like structure.
9. The method of claim 1 , wherein the first dispersion or solution is a polyolefin dispersion.
10. The method of claim 9 , wherein the polyolefin dispersion is an ethylene copolymer dispersion with a weight percent of a polyethylene-octene copolymer between 90 and 10 and a weight percent of an ethylene-acrylic acid copolymer between 10 and 90.
11. The method of claim 1 , further comprising adding one or more of a solid particle and a non-web fiber into the first dispersion or solution, wherein scraping includes scraping only the collapsed foam film-like structure including the one or more of a solid particle and a non-web fiber from the dryer surface.
12. The method of claim 1 , further comprising adding one or more of a solid particle and a non-web fiber into the first frothed dispersion or frothed solution, wherein scraping includes scraping only the collapsed foam film-like structure including the one or more of a solid particle and a non-web fiber from the dryer surface.
13. The method of claim 1 , further comprising adding one or more of a solid particle and a non-web fiber to the dryer surface or to the first frothed dispersion or frothed solution prior to the conversion to a collapsed foam film-like structure, wherein scraping includes scraping only the collapsed foam film-like structure including the one or more of a solid particle and a non-web fiber from the dryer surface.
14. A method of forming a collapsed foam film-like structure, the method comprising:
a) positioning a composition applicator adjacent to a heated non-permeable dryer surface;
b) producing a first dispersion or solution;
c) producing a second dispersion or solution;
d) blending the first dispersion or solution and the second dispersion or solution to produce a blended dispersion or solution;
e) frothing the blended dispersion or solution;
f) applying the blended frothed dispersion or frothed solution to the dryer surface;
g) allowing the blended frothed dispersion or frothed solution to convert to a collapsed foam film-like structure; and
h) scraping only the collapsed foam film-like structure from the dryer surface.
15. The method of claim 14 , wherein the steps a-h are performed in sequential order.
16. The method of claim 14 , further comprising adding one or more of a solid particle and a non-web fiber into one of the first dispersion or solution, second dispersion or solution, or blended dispersion or solution, wherein scraping includes scraping only the collapsed foam film-like structure including the one or more of a solid particle and a non-web fiber from the dryer surface.
17. The method of claim 14 , wherein the first dispersion or solution is an ethylene copolymer dispersion with a weight percent of a polyethylene-octene copolymer between 90 and 10 and a weight percent of an ethylene-acrylic acid copolymer between 10 and 90.