Stock material or miscellaneous articles – Composite – Of addition polymer from unsaturated monomers
Patent
1994-10-24
1995-09-26
Beck, Shrive
Stock material or miscellaneous articles
Composite
Of addition polymer from unsaturated monomers
4285371, 428541, B32B 2308, B32B 2710
Patent
active
054533279
ABSTRACT:
There is disclosed a method for the ammonia saturation of wood to impart flexibility thereto which includes the step of sealing the surfaces of ammonia-saturated wood with a polymeric film which has limited or no permeability to either or both ammonia and water vapor. Preferably, the polymeric film is flexible so the working of the wood product by bending, twisting, embossing, molding, etc. will not destroy the film. The polymeric film should also be soluble in a selected solvent, thereby permitting its removal after the wood has been formed in a final, desired shape to permit water vapor to re-establish crosslinking of the cellulose chains and restore its natural, rigid condition.
REFERENCES:
patent: 2546705 (1951-03-01), Strawinski
patent: 3282313 (1966-11-01), Schuerch
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Bill Keenan, Bending With Ammonia, Fine Woodworking Techniques No. 5, p. 191, Taunton Press, 1983.
Beck Shrive
Plante Thomas J.
Talbot Brian K.
Vanderburgh John E.
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