Method of making absorbent foam composites
A method of making absorbent foam composites and absorbent foam composites produced therefrom. The method comprises casting an absorbent foam layer having a first side and a second side opposite the first side onto a barrier layer having a first side and second side opposite the first side, where the second side of the absorbent foam layer is in contact with the first side of the barrier layer; joining a second absorbent layer to the second side of the barrier layer before, during, or after the casting step; and breaching the barrier layer after the casting step so that the foam layer and second absorbent layer are in fluid communication. The absorbent foam composites can be used in a variety of applications, including personal hygiene articles, medical bandages, pet pads and agricultural pads.
1. A method of making an absorbent foam composite comprising:
casting an hydrophilic open-celled absorbent foam layer having a first side and a second side opposite the first side onto a barrier layer having a first side and a second side opposite the first side, where the second side of the absorbent foam layer is in contact with the first side of the barrier layer;
joining a second absorbent layer to the second side of the barrier layer before, during, or after the casting step; and
breaching the barrier layer after the casting step so that the absorbent foam layer and second absorbent layer are in fluid communication.
2. The method of claim 1 , wherein the absorbent foam layer comprises polyurethane foam.
3. The method of claim 1 , wherein the second absorbent layer comprises superabsorbent polymer sandwiched between two layers of cellulosic fiber tissue.
4. The method of claim 1 , wherein the second absorbent layer comprises a preformed fibrous web with superabsorbent polymer dispersed within.
5. The method of claim 1 , wherein the barrier layer comprises at least one of films, coated nonwoven materials, and coated papers.
6. The method of claim 1 , wherein the barrier layer comprises polyester film.
7. The method of claim 1 , wherein the barrier layer is a film comprising at least one of polypropylene, polyethylene, and co-polymers thereof.
8. The method of claim 1 , wherein the barrier layer is breached by pin perforation.
9. The method of claim 1 , wherein the barrier layer is breached by skip slitting.
10. A method of making an absorbent foam composite comprising:
casting an hydrophilic open-celled absorbent foam layer having a first side and a second side opposite the first side onto a barrier layer having a first side and a second side opposite the first side, where the second side of the absorbent foam layer is in contact with the first side of the barrier layer;
joining a second absorbent layer to the second side of the barrier layer before, during, or after the casting step;
adding a second barrier layer to the first side of the absorbent foam layer during the casting step, where the second barrier layer has a first side and a second side opposite the first side, and the second side of the second barrier layer is in contact with the first side of the absorbent foam layer;
joining a third absorbent layer to the first side of the second barrier layer before, during or after the casting step;
breaching the two barrier layers so that the absorbent foam layer is in fluid contact with each of the second and third absorbent layers; and
skiving the foam layer to create two absorbent foam composites.
11. The method of claim 10 , wherein the absorbent foam layer comprises polyurethane foam.