Low-density viscoelastic foams, body support articles comprising same, and methods for making same

Abstract

A viscoelastic foam layer, comprising a polyurethane comprising: from about 15 weight parts to about 75 weight parts toluene diisocyanate (TDI) residues per 100 weight parts polyol residues; wherein the viscoelastic foam layer: has a density less than or equal to 2 pounds/cubic foot (0.032 g/cm3), has an air flow greater than or equal to 2.5 CFM (0.07 m3/min), has a recovery time greater than or equal to 4 seconds, has an indentation force deflection (IFD) less than or equal to 10 pounds/square foot (478.8 Pa), has a height loss less than or equal to 10% after prolonged compression of 90% of an original height. A method of making the viscoelastic foam layer. A body support article comprising the viscoelastic foam layer.

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