Process for making a polyurethane foam sheet and composites...

Details Process for making a polyurethane foam sheet and composites... Process for making a polyurethane foam sheet and composites...

B - Operations, Transporting

32

B

117/161, 154/90.

B32B 5/18 (2006.01) B32B 27/00 (2006.01) D06N 3/00 (2006.01) D06N 3/14 (2006.01)

Patent

CA 1039593

ABSTRACT OF THE DISCLOSURE A process is provided for making a polyurethane mechanical foam adapted to be used as an interlayer between a plastic surface layer and a textile, the process involving frothing a non-ionic aqueous dispersion free from emulsifying agents of a polyurethane having a particle size of less than about 1 micron, said dispersion having a solids content of more than about 45% by weight of polyurethane and about 0.1 to about 10 by weight of a thickening agent whereby the viscosity of the dispersion is from about 10 to about 70 seconds with a Ford cup having a 4 mm orifice to form a foamable mixture, spreading the frothed dispersion into a foamed film, and drying the resulting product.

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