Modified polyurethane product having improved load-bearing characteristics
OwnerMorey Weismaninventor
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Abstract
A modified low-density flexible polyurethane foam product having a relatively high degree of firmness as well as commercially acceptable dielectric heat sealing characteristics. The product formulation includes an intermediate constituted by a mixture of polyol and a polymer/polyol in a ratio imparting to the product a predetermined degree of firmness, and a thermoplastic additive whose dielectric loss index is greater than the loss index of polyurethane foam to impart to the product an acceptable dielectric heating response in a high frequency electric field. This response is enhanced by a styrene component included in the polymer/polyol.
Claims8
A modified flexible polyurethane foam product of low density derived from a formulation including an intermediate constituted by a mixture of a first polyol of a type adapted to yield a low density foam, and a polymer/polyol produced by polymerization of at least one monomer component in a second polyol in a ratio imparting to the product a predetermined degree of firmness which is greater than that obtainable in a foam derived entirely from the first polyol intermediate and is less than that obtainable in a foam derived entirely from a polymer/polyol intermediate, and a thermoplastic additive whose dielectric loss index is greater than that of a polyurethane foam;
- the additive being in a relative amount imparting to the modified product a loss index approaching that of polyvinyl chloride to produce an acceptable dielectric heating response in a high-frequency electric field.
Dependencies are inferred from the claim text.