TH29252A - What is the methodology for the continuous production of boards made from lignin and cellulose compounds? - Google Patents

Abstract

The methodology for the continuous production of boards with lignin and cellulose fiber materials involves breaking the materials into small pieces and/or fibers. These are then dried, glued, and formed into sheets. The sheets are then compressed into finished sheets while steam is introduced. According to the fabrication method, the compression is performed in a single step, and steam is introduced to one or more compression rollers by spraying. This steam curing process ensures sufficient resistance to the inherent shrinkage characteristics of the fibers, thus allowing for the achievement of the finished board thickness with a single compression step.

Claims (10)

1. The continuous production method of boards from fibrous materials of lignin and cellulose compounds involves breaking the material into small pieces and/or fibers, drying, gluing, and forming them into sheets. These sheets are then compressed into finished panels using at least one compression roller, and steam is introduced into the panel-forming process. A characteristic feature is that the compression is performed in a single step, during which steam is introduced through at least one compression roller. 2. Procedure consistent with Claim 1: Steam shall be introduced in an amount such that any air contained within the plate is expelled behind the plate. 3. Procedures consistent with claim 1 or 2, whereby the plates are pre-conditioned before being pressed. 4. Procedures consistent with Claim 3: Preconditioning involves conditioning the body to the temperature, moisture content, and density as previously specified. 5. Procedures consistent with claims 1-4: The compressed sheet is passed to the heating area. 6. Procedure consistent with claim 5: The pressed sheets are kept in a heated area for a sufficient time so that the adhesive in the sheets is cured to achieve its full hardness. 7. In accordance with claim 5 or 6, the extruded sheets are placed in a heating area at a temperature significantly related to the temperature of the board during its extrusion. 8. Procedures consistent with any of the claims 1-7: The compressed sheets are passed to the post-conditioning area. 9. Procedures consistent with claim 8. Post-conditioning practices include altering the moisture capacity of the compressed sheets and separating gases released from the sheets at the compression site. 10. In accordance with claim 8 or 9, the compressed sheets are cooled in the post-conditioning area.