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US 2017/0239857 A1Published application
Processes for producing flexible polyurethane foam laminates and laminates produced thereby
AssigneeCovestro LLC
InventorsUlrich B. Holeschovsky, Robert F. Felt, Michael S. Robinson, Susan C. Pigott
Life of this patent
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Abstract
Disclosed are continuous compression molding processes for producing a flexible polyurethane foam laminate and laminates produced thereby, which may be suitable for use, for example, as a carpet underlayment.
Claims20
A continuous compression molding process for producing a flexible polyurethane foam laminate, comprising:
- (a) feeding a first facing material along a first heated surface;
- (b) feeding a second facing material along a second heated surface, wherein the second heated surface is disposed generally parallel to the first heated surface at a preselected distance that defines a vertical space between the first facing material and the second facing material and that defines the thickness of the laminate;
- (c) depositing a polyurethane foam-forming composition onto the first facing material as it is being fed;
- and
- (d) allowing the polyurethane foam-forming composition to react in the vertical space, thereby rising until the rise is restricted by the second facing material and wherein the polyurethane foam-forming composition produces a cured flexible polyurethane foam laminate having a foam density of no more than 10 lb/ft3 (160 kg/m3).
2 more elements
Dependencies are inferred from the claim text.