Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1983-11-22
1985-05-07
Lawrence, Evan K.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156289, 427244, 427341, 427348, 427358, 427359, 427369, 427373, 427377, B05D 310, B05D 500
Patent
active
045156468
ABSTRACT:
A method for applying a blown polyurethane coating to carpeting or other sheet material. The method includes the step of adding a filler to the polyurethane components to assure that the liquid does not unduly penetrate porous goods. The mixed polyurethane components are then placed in a puddle on the sheet material and leveled to a uniform coating. Steam is passed through the sheet material and the coating to initiate the reaction of the components. The steam also adds water to the coating, so the formulation is such that additional water is needed, and the needed water is added by the steaming. After the polyurethane has completed blowing, and before the polyurethane has cured beyond its plastic state, the foam may be compressed to decrease the thickness. A second sheet of material can be placed over the polyurethane to prevent the polyurethane from adhering to the compressing roller.
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patent: 3705834 (1972-12-01), Terry
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patent: 4132817 (1979-01-01), Tillotson
patent: 4171395 (1979-10-01), Tillotson
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patent: 4278482 (1981-07-01), Poteet et al.
Hamrick Glen F.
Sosebee B. Lamar
Walker Paul
Hamrick Glen F.
Lawrence Evan K.
Middleton James B.
Walker Paul
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