EP0318528A1 - Process for treating freshly cut timber. - Google Patents
Process for treating freshly cut timber.Info
- Publication number
- EP0318528A1 EP0318528A1 EP88903339A EP88903339A EP0318528A1 EP 0318528 A1 EP0318528 A1 EP 0318528A1 EP 88903339 A EP88903339 A EP 88903339A EP 88903339 A EP88903339 A EP 88903339A EP 0318528 A1 EP0318528 A1 EP 0318528A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wood
- drying
- nitric acid
- moisture
- injection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/16—Inorganic impregnating agents
- B27K3/18—Compounds of alkaline earth metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/16—Inorganic impregnating agents
- B27K3/32—Mixtures of different inorganic impregnating agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/001—Heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/06—Softening or hardening of wood
Definitions
- the invention relates to a process for the treatment of fresh wood, in the course of which the wood prepared for drying, e.g. Lumber, is dried in a drying room in a known manner at a temperature between 40 ° C and 100 ° C to at least 30 moisture content.
- the wood prepared for drying e.g. Lumber
- the first three methods are used. With these three methods, the desired wood moisture content can be determined by means of time and space
- dry wood production generally consists of the following three main phases:
- the moisture content of the heating material dried using the currently known method can be adjusted to the desired level, but
- the aim of the inventive method is to remedy the deficiencies mentioned and to create a drying method which, in comparison with the previous drying methods, accepts the wood deformations, shape and dimension deviations, the tensions remaining therein and the duration of the drying process minimum reduced.
- Part of the gases in the air combine in the course of a reaction to form oxide, which converts to acid in the water and is able to release the alkaline earth metal incorporated during the growth of the wood if we salt it together with a distilled aqueous one Use the solution as a catalyst to accelerate the effect of this acid.
- the essence of the invention is that the distilled aqueous solution of the alkali metal salt is mixed with a nitric acid and the mixture thus obtained is injected at least once into the drying room.
- this spray agent the hard pectin is loosened, which is located in the fibers of the wood and prevents the removal of moisture, and the alkali earth metal builds up between the wood fibers.
- the composition of the mixture to be injected is as follows:
- concentration of nitric acid can be between 65-96H.
- This process enables the dry wood obtained in the course of the artificial drying process carried out in a few days to have the same properties as the wood that has been naturally dried in a few years.
- This process also enables the material to be made plasticizable and machinable without cutting (e.g. bendable, rotatable compressible, stretchable, can be dismantled into fibers, etc.) by reinforcing the natural chemical process, with relatively low wood moisture, and somi during the Growth within the known limits or keeping almost the same value as a living tree.
- the application can also be extended to other areas not previously used, e.g. enables the chipless shaping of wood materials previously thought to be inflexible and the shapeable shaping without damage caused by temperature
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Selon un procédé de traitement de bois fraîchement coupé, au cours duquel le bois brut, par example du bois scié, préparé pour le séchage, est séché de manière connue dans une chambre de séchage à une température comprise entre 40°C et 100°C jusqu'à atteindre une teneur en humidité d'au moins 30 %, on ajoute de l'acide nitrique à une solution d'un sel d'un métal alcalino-terreux dans de l'eau distillée et on pulvérise au moins une fois la solution ainsi obtenue dans la chambre de séchage. Ce produit ainsi pulvérisé ramollit la pectine dure des fibres du bois qui empêche l'humidité de s'échapper, le sel du métal alcalino-terreux s'incorporant en même temps entre les fibres du bois.According to a process for the treatment of freshly cut wood, during which the raw wood, for example sawn wood, prepared for drying, is dried in a known manner in a drying chamber at a temperature between 40°C and 100°C until a moisture content of at least 30% is reached, nitric acid is added to a solution of an alkaline earth metal salt in distilled water and the solution thus obtained in the drying chamber. This product thus pulverized softens the hard pectin of the fibers of the wood which prevents moisture from escaping, the salt of the alkaline-earth metal being incorporated at the same time between the fibers of the wood.
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT88903339T ATE65206T1 (en) | 1987-05-04 | 1988-04-20 | METHOD OF TREATMENT OF GREEN WOOD. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
HU198387 | 1987-05-04 | ||
HU871983A HU199088B (en) | 1987-05-04 | 1987-05-04 | Method for treating raw timbers |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0318528A1 true EP0318528A1 (en) | 1989-06-07 |
EP0318528B1 EP0318528B1 (en) | 1991-07-17 |
Family
ID=10957150
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88903339A Expired - Lifetime EP0318528B1 (en) | 1987-05-04 | 1988-04-20 | Process for treating freshly cut timber |
Country Status (9)
Country | Link |
---|---|
US (1) | US4977686A (en) |
EP (1) | EP0318528B1 (en) |
BR (1) | BR8807042A (en) |
CS (1) | CS277182B6 (en) |
DD (1) | DD272628A1 (en) |
HU (1) | HU199088B (en) |
PL (1) | PL155814B1 (en) |
RO (1) | RO105398B1 (en) |
WO (1) | WO1988008780A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0206970D0 (en) * | 2002-03-25 | 2002-05-08 | Nutrel Products Ltd | Delivery system |
FI20041448A0 (en) * | 2004-11-10 | 2004-11-10 | Tekmawood Oy | Procedure and apparatus for protecting timber |
JP2011189515A (en) * | 2010-03-11 | 2011-09-29 | Olympus Corp | Method of manufacturing compressed wood product |
DE102013223415A1 (en) * | 2013-11-15 | 2015-05-21 | Holzwerke Gmach GmbH | Method of artificial wood aging |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1855666A (en) * | 1930-04-12 | 1932-04-26 | Leo P Curtin | Process of preserving wood |
US2500954A (en) * | 1947-03-04 | 1950-03-21 | Us Agriculture | Method involving the use of chemicals for increasing the drying rate of wood |
CH485616A (en) * | 1964-02-13 | 1970-02-15 | Lonza Werke Gmbh | Process for the production of ceramic-bonded refractory bodies |
DE2460392A1 (en) * | 1974-12-20 | 1976-06-24 | Wilke Klaus Diether | Incombustible chipboard prodn using magnesium cpds - by treating with chloride soln., caustic oxide, sulphate soln. and oxide powder |
-
1987
- 1987-05-04 HU HU871983A patent/HU199088B/en not_active IP Right Cessation
-
1988
- 1988-04-20 BR BR888807042A patent/BR8807042A/en unknown
- 1988-04-20 US US07/300,065 patent/US4977686A/en not_active Expired - Fee Related
- 1988-04-20 EP EP88903339A patent/EP0318528B1/en not_active Expired - Lifetime
- 1988-04-20 WO PCT/HU1988/000023 patent/WO1988008780A1/en active IP Right Grant
- 1988-04-20 RO RO137540A patent/RO105398B1/en unknown
- 1988-04-27 CS CS882854A patent/CS277182B6/en unknown
- 1988-05-02 DD DD88315310A patent/DD272628A1/en not_active IP Right Cessation
- 1988-05-04 PL PL1988272246A patent/PL155814B1/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO8808780A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP0318528B1 (en) | 1991-07-17 |
CS277182B6 (en) | 1992-12-16 |
RO105398B1 (en) | 1994-12-21 |
DD272628A1 (en) | 1989-10-18 |
CS8802854A2 (en) | 1991-07-16 |
HU199088B (en) | 1990-01-29 |
PL155814B1 (en) | 1992-01-31 |
US4977686A (en) | 1990-12-18 |
PL272246A1 (en) | 1989-05-16 |
BR8807042A (en) | 1989-10-03 |
WO1988008780A1 (en) | 1988-11-17 |
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