TH16349A - Sheet board and board production - Google Patents

Abstract

A board of materials containing lignacellulose and the method of manufacturing the birds. The material is digested into particles or fibers, dried, coated with glue before or after drying, forming a sheet, and final drying by compression. Hot to a successful board According to the invention, the lignin was permed. Chemical conversion, at least at the surface of the particles or fibers first. The last drying page In order to be able to react Hit the higher cohesion by letting the hydrophilic group go in. And to make the lignin softening temperature so low, the lignocellulose noboard material was partially sulfonated. So that the sulfur that has been combined is organic Exceeds the natural gum content of the material, but is lower than 0.4%.

Claims (3)

1.Dry board The lignocellulose material is then hot pressed and formed in any form or shape, with the characteristics that the lignacellulose material is sulfonated as a Partly so that the sulfur being included is too organic Than the natural sulfur content of lignocellulose material but lower than 0.4%. 2.The board, defined in claim 1, is characterized by the organic total sulfur content of 0.03 - 0.2%. 3. Boards, as defined in claims 1 and 2, are characterized by the presence of sulfur being included.