FIELD: woodworking industry.
SUBSTANCE: proposed method comprises impregnating wood blanks, drying, compaction and thermal treatment. Blanks impregnation is carried out with 30-40%-water solution of carbamide containing pre-condensate of carbamide-formaldehyde oligomer in amount of 10-12% of dry carbamide weight. Note here that hardener, i.e. "ПКП-52"-carbamide-formaldehyde resin is added to impregnating solution in amount of 21-25% of carbamide-formaldehyde oligomer weight. Before thermal treatment, timber is subjected to pulse magnetic field for 30 s with amplitude of 0.5 T, pulse repetition frequency of 50 Hz and duration of triangular pulses of 30 mcs. Thermal treatment is performed at 140-160°C.
EFFECT: reduction in volumetric swelling of modified timber in water.
1 dwg, 1 tbl, 2 ex
Title | Year | Author | Number |
---|---|---|---|
METHOD OF PRODUCING MODIFIED WOOD | 2018 |
|
RU2710171C1 |
METHOD OF PRODUCING MODIFIED WOOD | 2014 |
|
RU2605752C2 |
METHOD FOR PRODUCTION OF MODIFIED WOOD | 2001 |
|
RU2229377C2 |
METHOD OF PRODUCING MODIFIED WOOD | 2019 |
|
RU2712521C1 |
METHOD OF TIMBER MODIFICATION | 2011 |
|
RU2476311C1 |
METHOD OF PRODUCING ACETYLATED WOOD | 2007 |
|
RU2391202C1 |
METHOD FOR LOCAL MODIFICATION OF WOOD IN BUILDING STRUCTURES | 2018 |
|
RU2713115C1 |
MODIFIED WOOD MANUFACTURE METHOD | 1997 |
|
RU2131351C1 |
COMPOSITION FOR PREPARING SOLUTION FOR WOOD IMPREGNATION, SOLUTION FOR WOOD IMPREGNATION AND METHOD FOR USING THIS SOLUTION | 2021 |
|
RU2771676C1 |
METHOD OF MAKING MODIFIED WOOD | 0 |
|
SU1105311A1 |
Authors
Dates
2010-10-10—Published
2008-10-07—Filed