Hard wood strand products
AssigneeLignor Limited
InventorsPeter Edward Burton, Graham Thomas Coulthard
Life of this patent
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Abstract
A strand lumber or board product based on eucalypt species and an iso-cyanate binder such as PMDI.
Claims13
A hard wood strand product including substantially aligned strands of one or more eucalypts bonded together with a binder including a polymeric diisocyanate resin and a wax, the product having a modulus of elasticity greater than 14,000 N/mm2 and a swell of less than 2% in a standard 24 hour moisture swell test.
A method of manufacturing a hard wood strand product having a modulus of elasticity greater than 14,000 N/mm2 and a swell of less than 2% in a standard 24 hour moisture swell test, comprising the steps of:
- a) forming strands from logs of eucalypts;
- b) adding a binder including a polymeric diisocyanate resin and a wax to the strands;
- c) forming a mat with the binder and the strands which are substantially aligned;
- and,
- d) pressing and heating the mat using a press to form the strand product.
Dependencies are inferred from the claim text.