CN108177209A - A kind of method of wood materials compression compact - Google Patents
A kind of method of wood materials compression compact Download PDFInfo
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- CN108177209A CN108177209A CN201711474145.5A CN201711474145A CN108177209A CN 108177209 A CN108177209 A CN 108177209A CN 201711474145 A CN201711474145 A CN 201711474145A CN 108177209 A CN108177209 A CN 108177209A
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- hot pressing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
Abstract
The invention discloses a kind of methods of wood materials compression compact, belong to wood materials production preparation field.The present invention to timber by carrying out hot pressing setting processing under vacuum, and treated, and timber specific modulus is big, and the hot pressing fixing time for solving existing wood compression densification technologies is long, the technical problems such as manufacture efficiency is low, discoloration and dimensional instability；The compression compactization manufacture of wood materials is carried out under vacuum, also improves the bonding strength of wooden glueing material.
Description
Technical field
The invention belongs to wood materials to produce preparation field, more specifically to a kind of wood compression densification and
The method for improving composite wooden material bonding strength.
Background technology
53,250,000 hectares of the artificial Linda in China, ranks first in the world.Compared with wildwood, artificial forest, which has, grows fast, life
The features such as length amount is high, exploitation is convenient and acquisition benefit morning, timber and lumber standards, quality are relatively stablized, utilization easy to process.But artificial forest
Since there are some material defects, if fast-growing Chinese fir material is poor, short texture, intensity and hardness are low, not wear-resisting, easy to moisture absorption, make
Its industrial applications is very restricted.Therefore, the correlated performance of fast growing wood is improved, is to expand its utilization scope master
Want one of method.
Common timber enhanced processing method has resin infusion method and compression compact method.Impregnation timber is most widely square
Method is vacuum impregnation method, i.e., timber first vacuumizes under certain condition of negative pressure, then using process tank external and internal pressure difference by stain
Timber in resin injection tank, and kept for the corresponding time.But timber is a kind of heterogeneous natural material of porosity, and respectively to different
Property it is big, so using after various low-molecular-weight resin impregnation timber, resin is often uneven in the distribution of wood internal,
And the chemical reagent added in has certain influence to health and earth environment.But in the prior art under vacuum state at dipping
Timber is managed, and takes pressurization (hot pressing), does not have relevant document to record, if simply by impregnation timber under vacuum state simultaneously
Hot-pressing processing is carried out, the effect of dipping and hot pressing is often not achieved, while chemical reagent can not be solved to health and ground
The problems such as ball environmental pollution.
Compression compact is a kind of high-quality technology utilized of bad material.Fast growing wood compression compact is one that it is modified important
Direction, the purpose is to improve its related physical, mechanical property.After fast growing wood is handled by compression compactization, it is hard that it can be improved
Degree, wearability and dimensional stability, so as to partly broadleaf be replaced to use.
Conventional wood compression densification technologies mainly include sofening treatment, transverse compression and compressed deformation before compression
Three steps are fixed, the technology production time is long, efficiency is low.Although the density of wood increase after the technical finesse, compares mould
Amount does not improve or even the specific modulus of timber can reduce instead, and therefore, the performance of timber is not promoted well.In addition,
In wood compression compacting process, polysaccharide, hemicellulose and extract in Wood chemical composition have occurred degradation, oxidation,
A series of chemical changes such as polycondensation, coloring matter content increases, so that wood surface color burn, affects U.S. of product
Sight and quality.
Chinese invention patent, publication number：CN102198679B, publication date：On March 26th, 2014, disclose a kind of fast-growing
The method of flooring board enhancing processing.This method is handled according to following order：A. it is using hot press that fast-growing floor base material is close
Realification；B. the fast-growing plank of densification is realized into surface carbonation on heating platen；C. it using radio frequency plasma method of modifying, allows
Nitrogen plasma carries out gas-solid two-phase chemistry lamination with carbon and is nitrogenized.Through the inventive method treated fast-growing flooring board
Have the advantages that surface hardness is high, wear-resisting, shortcoming is：The invention from it is closely knit to carbonization again to nitridation, complex process, processing
Period is long, and 80~120 DEG C are taken in hot pressing temperature, and hot pressing pressure takes 0.8~2.0MPa, and the time takes and carries out under conditions of 5~15min
Heat pressing compact, plank will appear rebound, and dimensional stability is bad；In addition, in 200 DEG C or more of high temperature after the processing of base material densification
Carbonization treatment is carried out to it under environment, easily causes wood surface discoloration, thus destroys the texture color and luster of China fir in itself.
Chinese invention patent, publication number：CN 101875207A, publication date：On November 3rd, 2010, disclose low-quality fast-growing
Log in situ is closely knit and the processing method of bacteriostat degerming functions, including：Work in vacuum pressed tank by pressurizeing and vacuumizing
Filler will be planted low-quality fast growing wood progress closely knit and antibacterial bacteriostatic in situ and handled by skill.The invention operation temperature is low, to timber without
Compression belongs in situ closely knit.But disadvantage is that：(1) invention needs to add additional filler, thus increases
Extra-pay, cost are higher；(2) filler penetrate into wood internal time it is longer, thus the entire sheet fabrication period also compared with
It is long；(3) timber density after dipping substantially increases, though Deflection Modulus of Elasticity improves 36.2%, the specific modulus of material is big
It reduces greatly, affects the performance of material.
Chinese invention patent, publication number：CN103433982B, publication date：On August 5th, 2015, discloses cross-bedding pressing plate
Material processing method, specifically include laminate prepare, composite modifier configuration, surface layer laminate be modified enhancing, laminate refer to connect, laminate is applied
Glue, assembly, compacting, post-production.It is right in closed pressurized tank including surface layer laminate is put into that surface layer laminate is modified enhancing technique
Pressurized tank, which is repeated, to be vacuumized and pressurized treatments, composite modifier are impregnated under pressure in the laminate of surface layer, for row
The extra composite modifier in ejecting plate surface layer, then to seal-off pressure tank vacuumize process.By modified enhancing in assembly, pressing process
Laminate is placed in surface layer and carries out assembly according to the mutually perpendicular mode of grain direction of adjacent laminate, is put into press and is cold-pressed after assembly
Molding, while it is subject to lateral pressure.Its shortcoming is：(1) time of composite modifier infiltration wood internal is longer thus whole
A sheet fabrication period is also longer；(2) plank is placed in pressurized tank and vacuumizes by the invention carries out impregnation modification, then will
Treated that plank carries out press compression enhancing processing in a normal state for impregnating by pressure, and for fast-growing Chinese fir etc., itself pit is close
Real timber, modifying agent is difficult to penetrate into, and material surface performance is also changed after impregnation.There are still conventional dippings
The various defects of processing.
In addition, the formation of bonding strength is a complicated process during wood gluing, it is broadly divided into following 5 steps：Stream
Dynamic, transmission, infiltration, wetting and curing.The production of glued board at present is frequently with urea-formaldehyde resin adhesive, in glued board or other wood
In composite material manufacturing process, since timber is porous material, in hot pressing can aggravate adhesive penetrates at veneer, glue
It closes the gluing agent content at layer to reduce, seriously affects glued effect, thereby reduce the final bonding strength of glued board.This is also
The above-mentioned prior art or the industry technical barrier also to be solved.
Invention content
1st, it to solve the problems, such as
For defect present in existing impregnation and wood compression densification technology and conventional Wood composite
The problems such as production cycle is long in material manufacture processing, and production cost is high, and production equipment utilization ratio is low and product mechanical property is poor,
The invention discloses a kind of methods of wood materials compression compact, can wood materials be played with compression, fixation and setting simultaneously
Purpose, and the mechanical strengths of wood materials fully meets requirement after handling, the standby compressed wood material with the common hot pressing of use
Material is compared, and aberration is small, and bending strength is high, and specific modulus is big, while also improves the bonding strength of existing wooden glueing material.
2nd, technical solution
To solve the above problems, the present invention adopts the following technical scheme that：
A kind of wood materials compression compact method, includes the following steps：
It pressurizes to wood materials in vacuum state；Moulding pressure takes 1-4MPa；After reaching pressing time, vacuum is gone,
Carry out release, cooling.
Preferably, wood materials are carried out in vacuum state hot pressing；The hot pressing temperature takes 100 DEG C -220 DEG C, hot pressing
Pressure takes 1-4MPa；After reaching hot pressing time, vacuum is gone, carries out release, cooling.
It is described in vacuum state hot pressing, vacuum degree is -0.1MPa~-0.09MPa.
Wood materials compression compact method and step further include wood materials are dried and sanding surface processing；To dry
Treated that wood materials are cut for the processing of dry and sanding surface.
The wood materials are timber or composite wooden material, and the composite wooden material is glued board, structure collects
It becomes a useful person, particieboard or structural veneer laminated timber.
The drying and sanding surface processing treated lumber thickness are 18-22mm；Whole moisture content is 10 ± 2%.
The wood materials are first vacuumized before compression for timber, and vacuum degree is -0.1MPa~-0.09MPa, the heat
Pressure temperature takes 160 DEG C -220 DEG C, and hot pressing time takes 15min-45min, and hot pressing pressure takes 2-4MPa；Allow entire wood compression close
Realification process is always all in vacuum state.
Wood materials compression compactization improves the manufacturing method of wood materials bonding strength, includes the following steps：
(1) by timber rotary-cut or slicing into Wooden veneer；
(2) to treated in step (1), Wooden veneer is dried；
(3) to treated in step (2), Wooden veneer carries out covering with paint adhesive；
(4) to treated in step (3), Wooden veneer carries out assembly；
(5) vacuum hotpressing is carried out to treated in step (4) slab, vacuum degree is -0.1MPa~-0.09MPa, hot pressing
Temperature takes 100 DEG C -120 DEG C, and hot pressing time takes 50-90s/mm, and hot pressing pressure takes 1-2MPa；
(6) to treated in step (5) slab, after reaching hot pressing time, vacuum, release, cooling, cutting edge and sanding are gone
The glued board of high bonding strength is finally made in processing.
Wooden veneer whole moisture content after drying process is 8 ± 3% in the step (2).
The adhesive is urea-formaldehyde resin adhesive at the step (3), and two-sided resin added is 200-300g/m2,
Slab described in step (4) is vertical-horizontal-vertical three layers or odd-level assemble pattern.
3rd, advantageous effect
Compared with the prior art, beneficial effects of the present invention are：
(1) method of wood materials compression compact provided by the invention increases the surface layer density of material by compression,
Mechanical strength is improved, while improves the stability of material.Vacuumize process causes entire hot pressing in the condition of anaerobic
Lower progress, reduces the degradation of content of material, ensures the wood color of timber and significant change will not occur, while accelerate timber again
The migration of internal moisture, it is certain as losing for hydrone causes the hydrogen bond of molecule between wood chemical compositions and reconfigure
Chemical group changes, and forms crosslinked action, under the effect of external force so that and the directionality between microfibril is improved,
Crystallinity improves, and improves compression effectiveness.Softening and Partial digestion occur timber for lignin and hemicellulose under the high temperature conditions, micro-
Fibril easily moves, and forms the molecular moiety of stroma ground substance by partial cutoff, and internal stress is relaxed rapidly, when temperature reduces
When, stroma ground substance returns to glassy state again from viscous state, it is suppressed that the flexible deformation of microfibril, compressive deformation are able to be fixed.
Thus the present invention realizes hot pressing, fixation and setting function simultaneously, and solving ordinary hot, to depress timber easy to change and stability is poor
Problem；
(2) the secondly method of wood materials compression compact of the present invention, the boiling point of liquid is relatively low under vacuum condition, unit bodies
Molecular number is greatly reduced in product, and the molecular collision probability being evaporated reduces, that is, is not easy to return after being evaporated.In vacuum condition
Under when carrying out high temperature hot pressing processing to timber, vacuum environment pressure is relatively low, by means of differential pressure action, easily steams the moisture in timber
Go out, under the combination of stringent pressure and temperature, promote timber densification；
(3) method of wood materials densification provided by the invention, compared with prior art, without any additive to wood
Material carries out impregnation etc., thus entire working process process is environmentally protective, thus, wood materials obtained are free of nuisance
Matter, and the timber densification time of the present invention is very short, contributes to the raising of production efficiency；
(4) method of wood materials densification provided by the invention, wood materials are after vacuum hotpressing is handled, solid wood board
Hemicellulose inside material is degraded, and mass loss rate increases, and internal porosity reduces, the wood included in unit volume
The quality of material cell wall substance increases, and density of wood increases therewith, and the effective active area for bearing external force becomes larger, through the short time and
Under hot pressing condition, the Deflection Modulus of Elasticity of material greatly improves after rapid hot pressing, and the increase degree of elasticity modulus is more than density
Increase degree, the specific modulus of material substantially increases；
(5) method of wood materials densification provided by the invention, while wood materials bonding strength is also improved, using true
Empty hot-pressing technique, with regard to carrying out vacuumize process before hot pressing, the boiling point of substance reduces, and wood internal moisture can be in lower temperature
Under reach boiling point vaporization, wood surface water evaporation rate accelerate, accelerate speed of the wood internal moisture to external migration, so as to
So that glue-line is more easy to cure, improves the bonding strength of wood materials and shorten gluing time.
(6) method provided by the invention for improving wood materials bonding strength, using vacuum hot pressing technique, material is in anaerobic
Under conditions of carry out glued, reduce the palliating degradation degree of timber content, wood color made not change；Various solid matters are big
In air pressure environment, surface can adsorb some gases, when in vacuum, since density of gas molecules reduces, and the gas adsorbed
It can release into environment, the burst size of methanal of composite wooden material can be also reduced using vacuum technique；It is also prevented from simultaneously
Adhesive generates unfavorable chemical reaction at high temperature, is further ensured that bonding quality.
Specific embodiment
The present invention is further described below with reference to specific embodiment.
Embodiment 1
The specific test procedure of this experiment is as follows：
1) fir wood plank is dried and sanding surface is handled：By the fir wood plank that thickness is 23-24mm, sanding is extremely
22mm, moisture content is 10% after drying.
2) to the processing of dry and sanding surface, treated that fir wood plank is cut：Using sizing saw machine be made 200mm ×
The China fir test specimen of 100mm × 20mm (axial × tangential × radial direction).It is accurate to measure the rulers such as test specimen quality, width, thickness and length
Very little (position when measuring thickness is marked) accurately to 0.02mm, is recorded and is numbered to the data for measuring test specimen
It arranges.
3) numbered test specimen respectively carries out test specimen under vacuum and condition of normal pressure using hot press to compression processing (to hang down
Stumpage tangential compression)：The pressure of high temperature hot pressing contracting processing is 2MPa, compression ratio 30%, hot pressing time 30min, hot pressing
Temperature is 180 DEG C, 200 DEG C and 220 DEG C three kinds.After hot pressing time to be achieved, vacuum, removal pressure are gone, is cooled down, most final pressure is made
Contracting wood.Wherein, it goes first close vacuum valve during vacuum hotpressing, opens vacuum (-tight) housing, then carry out release again.
4) thickness (being measured in mark) of test specimen and weight are measured and are recorded after handling compression.
5) CIE (1976) the L*a*b colour systems recommended using International Commission on Illumination are measured and calculated compressed
The value of chromatism of test specimen and untreated test specimen.
6) Deflection Modulus of Elasticity detection is carried out to compressed test specimen using omnipotent mechanics machine.
Wood materials Deflection Modulus of Elasticity detection data (the GB/T 1936.2- that process according to embodiment 1 obtains
2009), as shown in table 1.
The detection data of 1 material Deflection Modulus of Elasticity of table
The detection data of 2 test specimen value of chromatism of table
The specific modulus data of 3 vacuum hotpressing test specimen of table
Result of implementation explanation carries out compression processing to timber under vacuum conditions, can effectively improve the bending resistance springform of material
Amount and specific modulus, and compared with conventional compression material, material surface color aberration is small.
Embodiment 2
With embodiment 1, difference is this experiment implementation steps,
1) sawing：By the fir wood plank that thickness is 21-23mm, sanding to 20mm, moisture content 10%.
2) vacuum hotpressing：Hot pressing pressure is 2MPa, compression ratio 30%, hot pressing time 15min, hot pressing temperature 180
DEG C, 200 DEG C and 220 DEG C three kinds.
4) release.
The wood materials detection data that process according to embodiment 2 obtains is as follows.
4 experimental test data of table
Vacuum compression time in embodiment 2 in embodiment 1 compared with shortening 15min, compared with Example 1, compressed wood
Intensity improving rate is lower, and value of chromatism smaller, i.e. surface color are more difficult to change.
Embodiment 3
If step is with embodiment 2, difference lies in sanding to 18mm, moisture content 12%, compression ratio during vacuum hotpressing is
20%, compression time 30min.
Shown in the detection data table 5 for the wood materials that process according to embodiment 3 obtains：
5 experimental test data of table
Embodiment 4
Step with embodiment 2, difference lies in vacuum hotpressing it is closely knit when vacuum compression rate be 10%, compression time 30min,
Hot pressing temperature is 200 DEG C.Obtained compressed wood is detected according to relevant regulations and standard.Result of implementation shows vacuum compression
Treated test specimen Deflection Modulus of Elasticity and specific modulus have been respectively increased 42.77%, 20.91% compared with material, and value of chromatism is
5.92%.
Embodiment 5
Step is with embodiment 2, and difference lies in test specimen is compressing before processing, is 8% by drying control moisture content, hot pressing
Temperature is 180 DEG C, and obtained compressed wood is detected according to relevant regulations and standard.Vacuum hotpressing treated test specimen bending resistance
Elasticity modulus and specific modulus have been respectively increased 33.36%, 10.26% compared with material, value of chromatism 6.11%.
Embodiment 6
Step is with embodiment 2, and difference lies in test specimen is compressing before processing, is 10% by drying control moisture content, hot pressing
Temperature is 160 DEG C, and compression time is detected for the obtained compressed wood of 45min according to relevant regulations and standard.Vacuum hotpressing
Treated test specimen Deflection Modulus of Elasticity and specific modulus have been respectively increased 20.64%, 7.55% compared with material, and value of chromatism is
5.78%.
Embodiment 7
Step is with embodiment 2, and difference lies in test specimen is compressing before processing, is 10% by drying control moisture content, adds
Pressure, compression time are detected for the obtained compressed wood of 45min according to relevant regulations and standard.Vacuum hotpressing treated examination
Part Deflection Modulus of Elasticity and specific modulus have also respectively obtained raising compared with material.
Embodiment 8
A kind of wood materials compression compact method, includes the following steps：
1) slicing and drying：The good China fir veneer of slicing (no crack degree), thickness are the Wooden veneer of 1.6-1.8mm,
It is carried out in drying box, drying temperature is 50 DEG C, time 12h, and whole moisture content is 8%.
2) gluing：Dried Wooden veneer is subjected to covering with paint adhesive, two-sided resin added is 300g/m2。
3) assembly：It is-horizontal-according to the vertical of glued board to indulge three layers of assemble pattern, prepare the slab of three layers of glued board.
4) vacuum hotpressing：After slab is put into press, vacuum (-tight) housing is closed, is vacuumized, hot pressing temperature is 110 DEG C, slab pressure
Power is 1.0MPa, hot pressing time 60s/mm.
5) release：After reaching hot pressing time, vacuum is gone, hot pressing terminates, and slab is taken out in release, then cooling, cutting edge and sand
Glued board is made in light processing.
The glued board detection data (GB/T 17657-2013) for the wood materials that process according to embodiment 1 obtains, such as table
Shown in 6：
The bonding strength detection data of 6 wood materials glued board of table
This result of implementation shows to carry out hot pressing under vacuum conditions, is remarkably improved the bonding strength of glued board.Using true
Empty hot-pressing processing, hence it is evident that improve wood materials bonding strength.
Embodiment 9
Step is with embodiment 6, and difference lies in veneer is 11% by drying control moisture content, two-sided resin added during gluing
For 280g/m2, vacuum hotpressing temperature be 120 DEG C, slab pressure be 1.5MPa, vacuum hotpressing time 50s/mm, obtained gluing
Plate is detected according to relevant regulations and standard, and bonding strength reaches 1.956MPa, is improved compared to the China for plywood under normal pressure
42.13%.
Embodiment 10
Step is with embodiment 6, and difference lies in veneer is 5% by drying control moisture content, and two-sided resin added is during gluing
250g/m2, vacuum hotpressing temperature is 100 DEG C, and vacuum hotpressing time 90s/mm, bonding strength reaches obtained glued board after testing
2.115MPa improves 24.6% compared to the China for plywood under normal pressure.
Embodiment 11
Step is with embodiment 6, and difference lies in China fir veneer thickness is 2mm, is 9% by drying control moisture content, gluing
When two-sided resin added be 240g/m2, vacuum hotpressing temperature is 90 DEG C, vacuum hotpressing time 60s/mm, and obtained glued board is through inspection
It surveys bonding strength and reaches 1.879MPa, 37.36% is improved compared to the China for plywood under normal pressure.
Embodiment 12
A kind of wood materials compression compact method, includes the following steps：
1) slicing and drying：The good board using poplar board of slicing (no crack degree), thickness are the Wooden veneer of 1.6-1.8mm,
It is carried out in drying box, drying temperature is 50 DEG C, time 12h, and whole moisture content is 10%.
2) gluing：Dried Wooden veneer is subjected to covering with paint adhesive, adhesive is phenolic resin, and solid content is
65%, two-sided resin added is 300g/m2。
3) assembly：According to the assemble pattern of laminated veneer lumber, 15 layers of structural veneer laminated timber are prepared.
4) vacuum hotpressing：After slab is put into press, vacuum (-tight) housing is closed, is vacuumized, hot pressing temperature is 145 DEG C, slab pressure
Power is 1.0MPa, hot pressing time 60s/mm.
5) release：After reaching hot pressing time, vacuum is gone, hot pressing terminates, and slab is taken out in release, then cooling, cutting edge and sand
Structural veneer laminated timber is made in light processing.
The structural veneer laminated timber detection data (GB/T 20241-2006) that process according to embodiment 12 obtains, such as table 7
It is shown：
The bonding strength detection data of 7 veneer level material of table
Embodiment 13：
The manufacturing method of wood materials laminated wood bonding strength is improved, is included the following steps：
1) saw lumber：Saw the pinus sylvestris var. mongolica sawn timber (width 140mm, thickness 10mm) made, moisture content 12%.
2) gluing：Covering with paint adhesive is carried out to dried pinus sylvestris var. mongolica, adhesive is resorcinol-phenol-formaldehyde copolymerization
Resin, solid content 50%, two-sided resin added are 260g/m2。
3) assembly：According to the assemble pattern of integrated timber, three-decker integrated timber is prepared.
4) vacuum hotpressing：After slab is put into press, vacuum (-tight) housing is closed, is vacuumized, hot pressing temperature is 145 DEG C, slab list
Position pressure is 1.0MPa, hot pressing time 60s/mm.
5) release：After reaching hot pressing time, vacuum is gone, hot pressing terminates, and slab is taken out in release, then cooling, cutting edge and sand
Structural glulam is made in light processing.
The integrated timber that process according to embodiment 13 obtains is detected according to standard GB/T/T 26899-2011, is led to
It crosses the glue-line shear strength (6.74MPa) that is averaged of integrated timber made of vacuum hotpressing to meet the requirements of the standard (6.0MPa), and higher than normal
The made integrated timber bonding strength of pressure.
Embodiment 14
Composite wooden material is particieboard, and the same conventional particieboard preparation method of preparation process, adhesive is phenolic resin glue,
Difference is vacuum hotpressing：After slab is put into press, vacuum (-tight) housing is closed, is vacuumized, hot pressing temperature is 145 DEG C, slab unit
Pressure is 1.0MPa, hot pressing time 60s/mm.The particieboard that process according to embodiment 14 obtains is detected, and passes through vacuum
The glue-line shear strength that is averaged of particieboard made of hot pressing is met the requirements of the standard, and glued strong higher than the particieboard made under normal pressure
Degree.
Claims (10)
- A kind of 1. method of wood materials compression compact, which is characterized in that include the following steps：It pressurizes under vacuum conditions to wood materials；The moulding pressure takes 1-4MPa, after reaching pressing time, goes true Sky carries out release, cooling.
- 2. the method for wood materials compression compact according to claim 1, which is characterized in that under vacuum conditions to wood Material carries out hot pressing；The hot pressing temperature takes 100 DEG C -220 DEG C, and hot pressing pressure takes 1-4MPa, after reaching hot pressing time, goes Vacuum carries out release, cooling.
- 3. a kind of method of wood materials compression compact according to claim 1 or 2, feature exists, described in vacuum State hot pressing, vacuum degree are -0.1MPa~-0.09MPa.
- 4. a kind of method of wood materials compression compact according to claim 1, feature exist, step is further included to wood Material is dried and sanding surface processing；To the processing of dry and sanding surface, treated that wood materials are cut.
- 5. the method for wood materials compression compact according to claim 3, feature exist, the wood materials are timber Or composite wooden material.
- A kind of 6. method of wood materials compression compact according to claim 4, which is characterized in that dry and surface sand Lumber thickness after light processing is 18-22mm；Whole moisture content is 10 ± 2%.
- A kind of 7. method of wood materials compression compact according to claim 6, which is characterized in that the wood materials For timber, first vacuumize before compression, that is, entire compression compact process allowed to carry out under vacuum conditions, vacuum degree for- 0.1MPa~-0.09MPa, the hot pressing temperature take 160 DEG C -220 DEG C, and hot pressing time takes 15min-45min, and hot pressing pressure takes 2-4MPa。
- 8. wood materials compression compact method according to claim 2, which is characterized in that include the following steps：(1) by timber rotary-cut or slicing into Wooden veneer；(2) to treated in step (1), Wooden veneer is dried；(3) to treated in step (2), Wooden veneer carries out covering with paint adhesive；(4) to treated in step (3), Wooden veneer carries out assembly；(5) vacuum hotpressing is carried out to treated in step (4) slab, vacuum degree is -0.1MPa~-0.09MPa, hot pressing temperature 100 DEG C -120 DEG C are taken, hot pressing time takes 50-90s/mm, and hot pressing pressure takes 1-2MPa；(6) to treated in step (5) slab, after reaching hot pressing time, vacuum is gone, at release, cooling, cutting edge and sanding The glued board of high bonding strength is finally made in reason.
- 9. wood materials compression compact method according to claim 7, which is characterized in that Wooden veneer in step (2) Whole moisture content is 8 ± 3% after drying process.
- A kind of 10. method of wood materials compression compact according to claim 8, which is characterized in that the step (3) adhesive is urea-formaldehyde resin adhesive at, and two-sided resin added is 200-300g/m2；Slab is described in step (4) Vertical-horizontal-vertical three layers or odd-level assemble pattern.
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|---|---|---|---|
| CN201711474145.5A CN108177209B (en) | 2017-12-29 | 2017-12-29 | A kind of method of wood materials compression compact |
| CN201910107522.4A CN109591122B (en) | 2017-12-29 | 2017-12-29 | Method for vacuum compression and densification of wood material |
| PCT/CN2018/095932 WO2019128197A1 (en) | 2017-12-29 | 2018-07-17 | Method for compressing and compacting wood material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711474145.5A CN108177209B (en) | 2017-12-29 | 2017-12-29 | A kind of method of wood materials compression compact |
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| CN108177209A true CN108177209A (en) | 2018-06-19 |
| CN108177209B CN108177209B (en) | 2019-03-29 |
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| WO (1) | WO2019128197A1 (en) |
Cited By (4)
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| CN109434975A (en) * | 2018-12-18 | 2019-03-08 | 南京工业大学 | Comprehensive fast growing wood material feature and the orthogonal laminated wood of building structure demand and preparation method thereof |
| WO2019128197A1 (en) * | 2017-12-29 | 2019-07-04 | 南京林业大学 | Method for compressing and compacting wood material |
| CN110472719A (en) * | 2019-08-01 | 2019-11-19 | 珠海全球时代科技有限公司 | The production method of wooden electronic label card |
| US11498240B2 (en) | 2017-12-29 | 2022-11-15 | Ahf, Llc | Densified wood including process for preparation |
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| WO2019128197A1 (en) * | 2017-12-29 | 2019-07-04 | 南京林业大学 | Method for compressing and compacting wood material |
| US11498240B2 (en) | 2017-12-29 | 2022-11-15 | Ahf, Llc | Densified wood including process for preparation |
| US11931917B2 (en) | 2017-12-29 | 2024-03-19 | Ahf, Llc | Densified wood including process for preparation |
| CN109434975A (en) * | 2018-12-18 | 2019-03-08 | 南京工业大学 | Comprehensive fast growing wood material feature and the orthogonal laminated wood of building structure demand and preparation method thereof |
| CN110472719A (en) * | 2019-08-01 | 2019-11-19 | 珠海全球时代科技有限公司 | The production method of wooden electronic label card |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019128197A1 (en) | 2019-07-04 |
| CN109591122A (en) | 2019-04-09 |
| CN108177209B (en) | 2019-03-29 |
| CN109591122B (en) | 2021-09-03 |
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