Flame laminable hydrophilic ester polyurethane foams

US7687139B2 · kind B2 · utility

Assignee

• Foamex Innovations Operating Company · US

Inventors

• Chiu Y. Chan · Wilmington, US
• Sharon A. Free · Wallingford, US
• Joshua D. Land · Media, US
• Marc J. Albero · Springfield, US
• Jagdish Patel · Sewell, US
• William Patrick Burke, III · Springfield, US

Key dates

• Filing date: Feb 26, 2008
• Grant date: Mar 30, 2010
• Expiry date: Apr 2, 2028

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/249991
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A hydrophilic ester polyurethane foam is flame laminated to a substrate using a thin sacrificial layer, preferably a sacrificial foam layer. The sacrificial layer in the resulting laminate structure has a thickness of 1.5 mm or less, and preferably is substantially burnt away. The resulting laminate exhibits good bond strength along its length and width without loss of liquid wicking and absorptive properties.