FIELD: woodworking. SUBSTANCE: method involves impregnating wood blanks with aqueous solution of carbamide under vacuum, pressing blanks in two stages, releasing pressure between stages, holding wood in I stage for 45-95 min. Heat treatment after pressing is conducted at 150-180 C for 60-150 min. Blanks are impregnated in presence of phosphoric acid at a carbamide/acid relation from 2.5:1 to 30:1. Amount of used carbamide is 5-15% of mass of perfectly dry wood blanks. EFFECT: higher efficiency. 3 cl, 2 tbl
Title | Year | Author | Number |
---|---|---|---|
COMPOSITION FOR PRODUCTION OF FIREPROOF PARTICLE BOARDS | 2011 |
|
RU2452616C1 |
APPLICATION OF LETAVIN AS COMPONENT OF WOOD BOARDS BASED ON AMIDO-FORMALDEHYDE BINDER | 2013 |
|
RU2535737C2 |
COMPOSITION FOR MAKING BIORESISTANT PARTICLE BOARD | 2011 |
|
RU2486053C2 |
METHOD OF PREPARING FIREPROOFING COMPOUND | 2000 |
|
RU2172242C1 |
METHOD FOR MAKING FIBROUS FACING MATERIAL FOR PROFILED LINEAR ELEMENTS OF FURNITURE | 0 |
|
SU1712189A1 |
COMPOSITION FOR MANUFACTURE OF LOW-TOXIC FIBERBOARDS BASED ON AMINOFORMALDEHYDE BINDER INCLUDING GUANILMOCEPAIN SULPHATE AS A FORMALDEHYDE SCAVENGER | 2017 |
|
RU2666759C1 |
LUMBER WORKING AND DEVICE TO THIS END | 2011 |
|
RU2516259C2 |
METHOD FOR PRODUCING THERMOPLASTIC WOOD (VERSIONS) | 1995 |
|
RU2091217C1 |
BINDER FOR MANUFACTURING WOOD BOARDS (OPTIONS) | 2003 |
|
RU2258728C2 |
METHOD FOR PREPARATION OF STOCKS FROM WOOD FOR PRESSING AND BENDING OPERATION | 2009 |
|
RU2400354C1 |
Authors
Dates
1994-12-15—Published
1992-02-21—Filed