Extrusion Coating of Polyethylene Foam onto a Woven Cloth Web, 1990 Polymers, Laminations & Coatings Conference Proceedings
The practicality of extrusion coating polyethylene foam onto a woven cloth is examined. Typically, foamed films are not produced via a slot die due to a corrugating effect of the foam extrudate. Because the targeted application involves an extrusion coated fabric, a slot-die configuration is necessary.
The application of a foamed film in place of a solid polymer film results in a raw material savings because a higher volume per pound of polymer is produced. Applications of a foam coated fabric might be: throw-away garments, tarpaulin, or pressure sensitive tape backings.
Variables that effect foam extrusion coating are temperature profile, laminating pressure, slot die opening, screw speed, roll gap, and chemical blowing agent type and concentration. With the right combination of these variables, a foam having a 30 pcf density can survive the extrusion coating process while maintaining a good bond to the cloth substrate.
Extrusion Coating of Polyethylene Foam onto a Woven Cloth Web, 1990 Polymers, Laminations & Coatings
