Fibrous sheet with improved properties

US12043963B2 · kind B2 · utility

Inventors

• Deborah J. Calewarts · Appleton, US
• Jian Qin · Appleton, US
• Charles W. Colman · Roswell, US
• Cathleen Mae Uttecht · Menasha, US
• Donald E. Waldroup · Roswell, US
• Francis P. Abuto · Johns Creek, US
• Jenny L. Day · Woodstock, US
• Stephen Michael Lindsay · Appleton, US

Key dates

• Filing date: Jan 11, 2022
• Grant date: Jul 23, 2024
• Expiry date: Jan 11, 2042

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D10B2331/04
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A method for producing a foam-formed multilayered substrate that includes producing an aqueous-based foam including at least 3% by weight non-straight synthetic binder fibers, wherein the non-straight synthetic binder fibers have an average length greater than 2 mm; forming together a wet sheet layer from the aqueous-based foam and a cellulosic fiber layer, wherein the cellulosic fiber layer includes at least 60 percent by weight cellulosic fibers; and drying the combined layers to obtain the foam-formed multilayer substrate. A multilayered substrate includes a first layer including at least 60 percent by weight non-straight synthetic binder fibers having an average length greater than 2 mm; and a second layer including at least 60 percent by weight cellulosic fiber, wherein the first layer is in a facing relationship with the second layer, and wherein the multilayered substrate has a wet/dry tensile ratio of at least 60%.