Uncoated recording media

US9068292B2 · kind B2 · utility

Assignee

• HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. · US

Inventors

• John L. Stoffel · San Diego, US
• Thomas Oswald · Fort Saskatchewan, CA
• Xulong Fu · San Diego, US
• Lokendra Pal · San Diego, US
• Silke Courtenay · San Diego, US

Key dates

• Filing date: Oct 29, 2013
• Grant date: Jun 30, 2015
• Expiry date: Oct 29, 2033

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21H17/675
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

An uncoated recording medium includes a blend of hardwood and softwood chemical pulp fibers, and thermomechanical pulp (TMP) fibers, with total fiber content at least 80 wt % of the medium's total wt %. Hardwood fibers range from about 20 wt % to about 70 wt %, softwood fibers range from about 30 wt % to about 50 wt %, and TMP fibers range from about 10 wt % to about 30 wt %, all relative to the total fiber content. A TiO2 amount ranges from about 1.5 wt % to about 6 wt % of the total wt %, and a bivalent or multivalent salt amount ranges from about 6,000 to about 16,000 μg/gram of the medium. The basis weight ranges from about 45 g/m2 to about 63 g/m2.