| 摘要 |
<p>The present invention pertains to a composite material from parts of a plant origin, for example, from wooden elements, veneers, chips, sawdust, bark, corn cobs, stalks and straw, containing lignocellulose materials with the content of polysaccharides, lignin, tannins, essential oils, which parts are bound together in the said composite material. The invention consists in application of an activation agent, for example, sulfuric acid, on the parts of starting material, which causes transformation of the polymeric compound of parts to an active monomer. An excess of activation agent is neutralized, if it is desired, by addition of a neutralization agent, for example, powdered urea. The activated parts are then put together and compressed under heating, to cause crosslinking of the activated monomer to a polymeric compound of similar character as is the original polymeric compound and thus bind the parts together. The activation effect can be increased by addition of a catalyst, for example, potassium permanganate. The binding effect of the binder generated from the lignocellulose material may be increased by addition of furylalcohol, furylaldehyde, furylacetone, phenols, or their precondensates or thermoplastics.</p> |
