Method of making medium density fiberboard

US8123904B2 · kind B2 · utility

Assignees

• Wisconsin Alumni Research Foundation · US
• Biopulping International Inc. · US
• The United States of America, as represented by the Secretary of Agriculture · US

Inventors

• Masood Akhtar · Madison, US
• William R. Kenealy · Madison, US
• Eric Horn · Madison, US
• Ross E. Swaney · Madison, US
• Jerrold Winandy · Mazomanie, US

Key dates

• Filing date: Aug 11, 2010
• Grant date: Feb 28, 2012
• Expiry date: Aug 11, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/1303
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

The present invention provides a method for producing an MDF board from pulp from a fibrous lignocellulose material using a treatment or pretreatment step which exposes the material to oxalic acid or oxalic acid derivatives (particularly dialkyl ester derivatives, particularly in the vapor phase). The treated wood is then subjected to a sugar extraction wash and refined using any one of the several pulping methods to produce a final pulp product. Once this is done the pulp is used to make MDF boards having improved water repellency properties.