CN104985657A - Enhanced high-temperature heat treated wood and manufacturing method thereof - Google Patents
Enhanced high-temperature heat treated wood and manufacturing method thereof Download PDFInfo
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- CN104985657A CN104985657A CN201510389711.7A CN201510389711A CN104985657A CN 104985657 A CN104985657 A CN 104985657A CN 201510389711 A CN201510389711 A CN 201510389711A CN 104985657 A CN104985657 A CN 104985657A
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- 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
- B27K5/0085—Thermal treatments, i.e. involving chemical modification of wood at temperatures well over 100°C
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- 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
- B27K1/00—Damping wood
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- 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
- B27K3/02—Processes; Apparatus
- B27K3/08—Impregnating by pressure, e.g. vacuum impregnation
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- 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
- B27K3/34—Organic 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
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/34—Organic impregnating agents
- B27K3/38—Aromatic compounds
-
- 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
- B27K5/04—Combined bleaching or impregnating and drying of wood
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention discloses enhanced high-temperature heat treated wood and a manufacturing method thereof. The manufacturing method comprises the following steps that 1, high-temperature heat treatment is performed, wherein man-made forest wood serves as raw materials, and high-temperature heat treatment is performed on the man-made forest wood to obtain heat treated wood; 2, impregnation enhancing treatment is performed, wherein the heat treated wood obtained by the step 1 is impregnated in resin adhesives to obtain impregnated wood; 3, solidification forming treatment is performed, wherein solidification forming treatment is performed on the impregnated wood obtained by the step 2 to obtain the enhanced high-temperature heat treated wood. According to the manufacturing method, not only can the mechanical properties of the wood be improved, but also the size stability of the wood can be improved, green and environmental protection are achieved, and the prepared enhanced high-temperature heat treated wood takes the man-made forest wood as the raw materials and is high in mechanical strength and good in size stability.
Description
Technical field
The invention belongs to the lumber functionality improvement category of wood processing field, be specifically related to a kind of enhancement mode high-temperature thermal treatment timber and manufacture method thereof.
Background technology
The general principle of heat_treated wood mainly utilizes the temperature conditions of 160-260 DEG C to treating of wood certain hour, the generation pyrolysis of wood cell wall material and molecular structure restructuring, wood components generation permanent chemical changes, the reduction of process hydroscopicity of wood, dimensional stability, weatherability are improved, thus be applicable to outdoor flooring, outdoor decoration wallboard, garden furniture, post-and-paling etc., on the other hand, heat_treated wood can cause again mechanical intensity of wood to reduce and weight saving, becomes its major defect.
The commercial applications of heat_treated wood technology mainly starts from European countries, but obvious lifting had been applied in domestic heat treatment technics and commercialization in the last few years, heat treatment technics or the progressive maturation of technique.Because of domestic wildwood resource critical shortage, part wood processing enterprise starts exploitation sight being turned to resourceful artificial forest fast growing wood, but artificial forest wood causes that density is lower, strength grade is poor, dimensional stability is low because of fast growth, although heat treatment technics can improve its dimensional stability, if but directly it is heat-treated, strength of wood can reduce further, well cannot meet instructions for use., intensity difference low for artificial forest wood density, the problem of heat treatment modification should not be directly used in, expedite the emergence of heat_treated wood and Chemical enhancement modification technology or heat treatment and physics and strengthen the combined modified integrated technique of modification technology, as resin-dipping enhancing-heat treatment integrated technique, heat treatment-enhanced squeezing integrated technique.For the former, timber intensity after resin-dipping has obvious enhancing, but follow-up heat treatment can cause efficiency lost resin to a certain extent, and material fragility increases, the partial destruction enhancing effect obtained; For the latter, timber is heat-treated rear plasticity and is obviously reduced, and the difficulty subsequently through enhanced squeezing significantly increases, and compression process not only can cause the loss of wood volume to a certain extent, also there is the resilience problem after compression process.
Artificial forest fast growing wood is very abundant in china natural resources, by the modification of science more, reasonable Efficient utilization method is to solve its problem such as intensity and dimensional stability, for raising added value of product, widen its application, alleviate the problems such as wildwood resource critical shortage and have very important significance.
Summary of the invention
The technical problem to be solved in the present invention overcomes the deficiencies in the prior art, there is provided a kind of mechanical intensity of wood that can improve can improve wood dimensional stability again and the manufacture method of the enhancement mode high-temperature thermal treatment timber of environmental protection, also provide a kind of and with artificial forest wood be that raw material, mechanical strength are high, excellent in dimensional stability and the enhancement mode high-temperature thermal treatment timber of environmental protection.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A manufacture method for enhancement mode high-temperature thermal treatment timber, comprises the following steps:
1) high-temperature heat treatment: take artificial forest wood as raw material, high-temperature heat treatment is carried out to artificial forest wood, obtains heat-treated wood;
2) dipping strengthens process: impregnated in Resin adhesive by step 1) gained heat-treated wood, obtain impreg;
3) solidifying and setting process: by step 2) gained impreg is cured heat treatment, obtains enhancement mode high-temperature thermal treatment timber.
In above-mentioned manufacture method, preferably, the high-temperature heat treatment of described step 1) comprises the steps:
1.1) primary drying: artificial forest wood is placed in high-temperature heat treatment tank, is first warming up to 100 DEG C with the heating rate of 15 DEG C/h ~ 20 DEG C/h, then is warming up to 130 DEG C, insulation 1h ~ 5h with the heating rate of 5 DEG C/h ~ 10 DEG C/h;
1.2) heat preservation hot process: the timber after primary drying is warming up to 160 DEG C ~ 260 DEG C by 130 DEG C, heating rate is 10 DEG C/h ~ 15 DEG C/h, temperature retention time is 1h ~ 4h, and the oxygen content of timber controls in≤2% scope;
1.3) cooling damping: the timber after heat preservation hot process is carried out spray and steam process, when temperature is down to 100 DEG C in high-temperature heat treatment tank, stops spray steaming process, be down to after room temperature until Wood temperature and go out tank, obtain heat-treated wood.
In above-mentioned manufacture method, preferably, described step 2) dipping strengthen process comprise the steps:
2.1) vacuumize: step 1) gained heat-treated wood is placed in impregnating autoclave and carries out vacuumizing process, vacuum is 0.06MPa ~ 0.095MPa, and the dwell time is 0.25h ~ 1h;
2.2) impregnating by pressure: add Resin adhesive in impregnating autoclave, carry out impregnating by pressure process to vacuumizing the heat-treated wood after process, impregnation pressure is 0.5MPa ~ 2.5MPa, and dip time is 30min ~ 120min;
2.3) redrying: the heat-treated wood after impregnating by pressure is carried out redrying, is 10% ~ 15% to final moisture content, obtains impreg.
In above-mentioned manufacture method, preferably, the solidifying and setting process of described step 3) comprises the steps:
3.1) curing molding: by step 2) gained impreg is placed in high-temperature heat treatment tank, is warming up to 105 DEG C ~ 130 DEG C, insulation 6h ~ 12h with the heating rate of 5 DEG C/h ~ 10 DEG C/h;
3.2) cooling damping: spray is carried out to the impreg after curing molding and steams conditioning, be 5% ~ 8% to final moisture content, obtain enhancement mode high-temperature thermal treatment timber.
In above-mentioned manufacture method, preferably, described manufacture method also comprises Balance Treatment, and concrete steps are: step 3) gained enhancement mode high-temperature thermal treatment timber is placed in indoor environment Mi Dui and displays 14 days ~ 30 days.
In above-mentioned manufacture method, preferably, described Resin adhesive is low-molecular-weight resin adhesive, and the solid content of described low-molecular-weight resin adhesive is 35% ~ 50%, and the dynamic viscosity of described low-molecular-weight resin adhesive is 10MPas ~ 20MPas.(in the present invention, low-molecular-weight refers to that the mean value of viscosity average molecular weigh is substantially in 300 ~ 500).
In above-mentioned manufacture method, preferably, described low-molecular-weight resin adhesive comprises urea-formaldehyde resin adhesive or water-soluble phenolic resin adhesive sticks agent.
In above-mentioned manufacture method, preferably, described artificial forest wood is artificial forest quick growth poplar wood or artificial forest fast-growing Chinese fir; The first moisture content of described artificial forest wood is 12% ~ 20%.
As a total technical conceive, the enhancement mode high-temperature thermal treatment timber that the present invention also provides a kind of above-mentioned manufacture method obtained.
In above-mentioned enhancement mode high-temperature thermal treatment timber, preferably, the density of described enhancement mode high-temperature thermal treatment timber is 0.55g/cm
3~ 0.7g/cm
3;
The bending strength of the heat-treated wood that the bending strength of described enhancement mode high-temperature thermal treatment timber obtains compared to described raw material, described step 1) improves 72.7% ~ 90.9%, 84.2% ~ 137.5% respectively;
The Deflection Modulus of Elasticity of the heat-treated wood that the Deflection Modulus of Elasticity of described enhancement mode high-temperature thermal treatment timber obtains compared to described raw material, described step 1) improves 51.7% ~ 78.5%, 66.7% ~ 112.5% respectively;
The radial shrinkage rate of described enhancement mode high-temperature thermal treatment timber reduces by 33.3% ~ 70% compared to described raw-material radial shrinkage rate;
The Chordwise shrinkage of described enhancement mode high-temperature thermal treatment timber reduces by 38.2% ~ 65% compared to described raw-material Chordwise shrinkage;
The radial bulking factor of described enhancement mode high-temperature thermal treatment timber reduces by 25.3% ~ 90.6% compared to described raw-material radial bulking factor;
The tangential bulking factor of described enhancement mode high-temperature thermal treatment timber reduces by 35.5% ~ 90.7% compared to described raw-material tangential bulking factor.
In the present invention, redrying comprises natural drying and artificial drying.
Compared with prior art, the invention has the advantages that:
(1) manufacture method of enhancement mode high-temperature thermal treatment timber of the present invention, its principle first carries out high-temperature heat treatment to reduce its hygroscopicity to timber, improve its dimensional stability, recycling low-molecular-weight resin carries out dipping to heat-treated wood and strengthens process, to make up the negative effect that heat treatment causes mechanical strength, and improve its dimensional stability further, finally by the curing molding process of uniform temperature, resin is solidified completely and forms stable chemical bonds with wood cell wall material and can not run off, and discharge free formaldehyde and the free-phenol of the non-complete reaction of cure stage, make process material safety and environmental protection more.
(2) manufacture method of the present invention is compared to heat_treated wood technology, dipping enhancing-heat treatment technics, heat treatment-enhanced squeezing technology etc., heat treatment of the present invention-dipping strengthens the problem that integrated technique well solves heat-treated wood mechanical strength degradation, after can also avoiding first impregnating resin, high-temperature heat treatment causes the problem of efficiency lost resin, give full play to the treatment effect that resin-dipping strengthens, mechanical strength, the dimensional stability of the rear timber of process are more excellent, and there is not the resilience problem caused by physical compression.
(3) enhancement mode high-temperature thermal treatment timber of the present invention, take artificial forest wood as raw material, after manufacture method process of the present invention, properties all has clear improvement.Its density is about 0.55g/cm
3~ 0.7g/cm
3, improve 57% ~ 100% compared to material (i.e. raw material); Dipping-heat-treated wood that bending strength is prepared compared to material, heat-treated wood, conventional dipping-heat treatment method improves 72.7% ~ 90.9%, 84.2% ~ 137.5%, 14.1% ~ 58.3% respectively; Dipping-heat-treated wood that Deflection Modulus of Elasticity is prepared compared to material, heat-treated wood, conventional dipping-heat treatment method improves 51.7% ~ 78.5%, 66.7% ~ 112.5%, 21.9% ~ 63.4% respectively; Radial, Chordwise shrinkage (moist wood is to over dry) reduces 33.3% ~ 70%, 38.2% ~ 65% than material respectively; Radial, tangential bulking factor (over dry is stable to water suction) reduces 25.3% ~ 90.6%, 35.5% ~ 90.7% than material respectively.
Detailed description of the invention
The invention will be further described and illustrate below to utilize concrete preferred embodiment, but protection domain not thereby limiting the invention.
embodiment:
A manufacture method for enhancement mode high-temperature thermal treatment timber of the present invention, with artificial forest quick growth poplar wood for raw material, comprises the following steps:
1) high-temperature heat treatment:
1.1) primary drying: by first moisture content be 12% poplar put into high-temperature heat treatment tank, first temperature is risen to 100 DEG C fast, heating rate is 15 DEG C/h, and wood surface temperature and internal temperature are reached unanimity; Again temperature plateau is risen to 130 DEG C, heating rate is 10 DEG C/h, is incubated 5 hours, moisture content is down to and is about 0;
1.2) heat preservation hot process: the poplar after primary drying is rapidly heated to 180 DEG C by 130 DEG C, heating rate is 15 DEG C/h, and temperature retention time is 4h, and oxygen content controls being less than or equal in 2% scope;
1.3) cooling damping: after heat preservation hot process, closes firing equipment, carries out spray steam process to the poplar after heat preservation hot process, when temperature is down to 100 DEG C in high-temperature heat treatment tank, stops spraying and steams process, until go out tank when Wood temperature is down to room temperature, obtain heat-treated wood.
2) dipping strengthens process:
2.1) vacuumizing: by step 1.3) heat-treated wood of gained is placed in impregnating autoclave, and carry out vacuumizing process, vacuum is 0.095MPa, dwell time 0. 5h;
2.2) impregnating by pressure: after vacuumizing process, urea-formaldehyde resin adhesive is added in impregnating autoclave, the solid content of urea-formaldehyde resin adhesive is 35%, the dynamic viscosity of urea-formaldehyde resin adhesive is 13MPas, carry out impregnating by pressure process to vacuumizing the heat-treated wood after process, impregnation pressure is 0.8MPa, and dip time is 120min, last slowly pressure release, obtains the heat-treated wood after impregnating by pressure;
2.3) redrying: the heat-treated wood after impregnating by pressure is placed in atmospheric environment, makes moisture natural evaporation a period of time, then carries out artificial drying, is 15%, obtains impreg to final moisture content.
3) solidifying and setting process:
3.1) curing molding: by step 2.3) impreg of gained is placed in high-temperature heat treatment tank, be steadily warming up to 105 DEG C with the heating rate of 5 DEG C/h, insulation 12h, makes resin solidify completely, and discharges the free formaldehyde of non-complete reaction in resin;
3.2) cooling damping: after curing molding terminates, carries out spray to the impreg after curing molding and steams conditioning, to final moisture content in 6%, obtain enhancement mode high-temperature thermal treatment timber.
4) Balance Treatment: step 3) gained enhancement mode high-temperature thermal treatment timber is placed in indoor environment Mi Dui and displays 14 days.
After testing, the enhancement mode high-temperature thermal treatment timber of the method manufacture of above-mentioned the present embodiment, density reaches 0.6g/cm
3, improve 71.4% compared to raw material (i.e. material); Bending strength is 100MPa, compared to raw material, step 1.3) dipping-heat-treated wood of preparing of the heat-treated wood that obtains, conventional dipping-heat treatment method improves 81.8%, 92.3%, 20.2% respectively; Deflection Modulus of Elasticity is 8800MPa, compared to raw material, step 1.3) dipping-heat-treated wood of preparing of the heat-treated wood that obtains, conventional dipping-heat treatment method improves 57.1%, 72.1%, 28.1% respectively; Radial shrinkage rate, Chordwise shrinkage (moist wood is to over dry) are respectively 1.8%, 4.2%, reduce 66.4%, 61.3% respectively compared to raw material; Radial bulking factor, tangential bulking factor (over dry is stable to water suction) are respectively 0.8%, 2.1%, reduce 73.3%, 73.1% respectively compared to raw material.
The enhancement mode high-temperature thermal treatment timber that the present embodiment manufactures, mechanical strength and excellent in dimensional stability, can be widely used in the field such as outdoor flooring, outdoor decoration structural wood.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is also not only confined to above-described embodiment.All technical schemes belonged under thinking of the present invention all belong to protection scope of the present invention.It is noted that for those skilled in the art, improvements and modifications under the premise without departing from the principles of the invention, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a manufacture method for enhancement mode high-temperature thermal treatment timber, comprises the following steps:
1) high-temperature heat treatment: take artificial forest wood as raw material, high-temperature heat treatment is carried out to artificial forest wood, obtains heat-treated wood;
2) dipping strengthens process: impregnated in Resin adhesive by step 1) gained heat-treated wood, obtain impreg;
3) solidifying and setting process: by step 2) gained impreg is cured heat treatment, obtains enhancement mode high-temperature thermal treatment timber.
2. manufacture method according to claim 1, is characterized in that, the high-temperature heat treatment of described step 1) comprises the steps:
1.1) primary drying: artificial forest wood is placed in high-temperature heat treatment tank, is first warming up to 100 DEG C with the heating rate of 15 DEG C/h ~ 20 DEG C/h, then is warming up to 130 DEG C, insulation 1h ~ 5h with the heating rate of 5 DEG C/h ~ 10 DEG C/h;
1.2) heat preservation hot process: the timber after primary drying is warming up to 160 DEG C ~ 260 DEG C by 130 DEG C, heating rate is 10 DEG C/h ~ 15 DEG C/h, temperature retention time is 1h ~ 4h, and the oxygen content of timber controls in≤2% scope;
1.3) cooling damping: the timber after heat preservation hot process is carried out spray and steam process, when temperature is down to 100 DEG C in high-temperature heat treatment tank, stops spray steaming process, be down to after room temperature until Wood temperature and go out tank, obtain heat-treated wood.
3. manufacture method according to claim 1, is characterized in that, described step 2) dipping strengthen process comprise the steps:
2.1) vacuumize: step 1) gained heat-treated wood is placed in impregnating autoclave and carries out vacuumizing process, vacuum is 0.06MPa ~ 0.095MPa, and the dwell time is 0.25h ~ 1h;
2.2) impregnating by pressure: add Resin adhesive in impregnating autoclave, carry out impregnating by pressure process to vacuumizing the heat-treated wood after process, impregnation pressure is 0.5MPa ~ 2.5MPa, and dip time is 30min ~ 120min;
2.3) redrying: the heat-treated wood after impregnating by pressure is carried out redrying, is 10% ~ 15% to final moisture content, obtains impreg.
4. manufacture method according to claim 1, is characterized in that, the solidifying and setting process of described step 3) comprises the steps:
3.1) curing molding: by step 2) gained impreg is placed in high-temperature heat treatment tank, is warming up to 105 DEG C ~ 130 DEG C, insulation 6h ~ 12h with the heating rate of 5 DEG C/h ~ 10 DEG C/h;
3.2) cooling damping: spray is carried out to the impreg after curing molding and steams conditioning, be 5% ~ 8% to final moisture content, obtain enhancement mode high-temperature thermal treatment timber.
5. the manufacture method according to any one of Claims 1 to 4, is characterized in that, described manufacture method also comprises Balance Treatment, and concrete steps are: step 3) gained enhancement mode high-temperature thermal treatment timber is placed in indoor environment Mi Dui and displays 14 days ~ 30 days.
6. the manufacture method according to any one of Claims 1 to 4, it is characterized in that, described Resin adhesive is low-molecular-weight resin adhesive, and the solid content of described low-molecular-weight resin adhesive is 35% ~ 50%, and the dynamic viscosity of described low-molecular-weight resin adhesive is 10MPas ~ 20MPas.
7. manufacture method according to claim 6, is characterized in that, described low-molecular-weight resin adhesive comprises urea-formaldehyde resin adhesive or water-soluble phenolic resin adhesive sticks agent.
8. the manufacture method according to any one of Claims 1 to 4, is characterized in that, described artificial forest wood is artificial forest quick growth poplar wood or artificial forest fast-growing Chinese fir; The first moisture content of described artificial forest wood is 12% ~ 20%.
9. the enhancement mode high-temperature thermal treatment timber that the manufacture method according to any one of claim 1 ~ 8 is obtained.
10. enhancement mode high-temperature thermal treatment timber according to claim 9, is characterized in that, the density of described enhancement mode high-temperature thermal treatment timber is 0.55g/cm
3~ 0.7g/cm
3;
The bending strength of the heat-treated wood that the bending strength of described enhancement mode high-temperature thermal treatment timber obtains compared to described raw material, described step 1) improves 72.7% ~ 90.9%, 84.2% ~ 137.5% respectively;
The Deflection Modulus of Elasticity of the heat-treated wood that the Deflection Modulus of Elasticity of described enhancement mode high-temperature thermal treatment timber obtains compared to described raw material, described step 1) improves 51.7% ~ 78.5%, 66.7% ~ 112.5% respectively;
The radial shrinkage rate of described enhancement mode high-temperature thermal treatment timber reduces by 33.3% ~ 70% compared to described raw-material radial shrinkage rate;
The Chordwise shrinkage of described enhancement mode high-temperature thermal treatment timber reduces by 38.2% ~ 65% compared to described raw-material Chordwise shrinkage;
The radial bulking factor of described enhancement mode high-temperature thermal treatment timber reduces by 25.3% ~ 90.6% compared to described raw-material radial bulking factor;
The tangential bulking factor of described enhancement mode high-temperature thermal treatment timber reduces by 35.5% ~ 90.7% compared to described raw-material tangential bulking factor.
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| CN114953074A (en) * | 2022-05-25 | 2022-08-30 | 安徽农业大学 | Wood heat treatment method capable of carrying out in-situ restoration and modified wood obtained by same |
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