CN110181628A - A kind of rubber wood timber and its method of modifying of environment-friendly high-intensity heat treatment - Google Patents
A kind of rubber wood timber and its method of modifying of environment-friendly high-intensity heat treatment Download PDFInfo
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- CN110181628A CN110181628A CN201910410093.8A CN201910410093A CN110181628A CN 110181628 A CN110181628 A CN 110181628A CN 201910410093 A CN201910410093 A CN 201910410093A CN 110181628 A CN110181628 A CN 110181628A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 69
- 229920002531 Rubberwood Polymers 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 238000013016 damping Methods 0.000 claims abstract description 7
- 238000004321 preservation Methods 0.000 claims abstract description 6
- 230000007613 environmental effect Effects 0.000 claims abstract description 3
- 239000010410 layer Substances 0.000 claims description 42
- 239000012792 core layer Substances 0.000 claims description 23
- 238000012545 processing Methods 0.000 claims description 9
- 238000002791 soaking Methods 0.000 claims description 7
- 229920001971 elastomer Polymers 0.000 claims description 6
- 239000002023 wood Substances 0.000 abstract description 24
- 230000008569 process Effects 0.000 abstract description 7
- 238000001035 drying Methods 0.000 abstract description 6
- 239000010875 treated wood Substances 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000007787 solid Substances 0.000 abstract 3
- 238000011109 contamination Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 9
- 238000005259 measurement Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000010792 warming Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 244000174681 Michelia champaca Species 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- -1 cyanurotriamide modified urea Chemical class 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002803 maceration Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- B27K1/00—Damping wood
-
- 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
-
- 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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- 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 the rubber wood timbers and its method of modifying of a kind of heat treatment of environment-friendly high-intensity.The color difference Δ E* of the rubber wood timber of the environment-friendly high-intensity heat treatment is 18~30, and density is 0.62~0.68g/cm3, moisture content is 6~6.3%；Parallel-to-grain compressive strength is 38~45MPa, and supine human body is 1800~2200N.The method of the present invention includes the following steps: drying, damping, heating, heat preservation, the low damage temperature with high efficiency of intensity, cooling six stages.The present invention can be under the premise of greatly improving the dimensional stability of timber, and effectively control loss of strength prepares high-intensitive heat-treated wood.For treatment process without chemical contamination, high production efficiency is at low cost simultaneously, easy to operate, has the advantages that efficient, environmental protection.The dimensional stability and decorative performance of timber, while the disadvantage for overcoming heat-treated wood intensity low are improved, can be widely applied to the Wood Products Industries such as solid wooden floor board, solid wood furniture, Solid Door.
Description
Technical field
The invention belongs to Wooden modifying and woodwork technical field of producing, more particularly, to a kind of environment-friendly, high-intensity
Spend the rubber wood timber and its method of modifying of heat treatment.
Background technique
High-temperature heat treatment is also known as charing process, typically refers in the environment of anoxic or few oxygen, with normal pressure overheat steam,
Inert gas, hot oil etc. are heat medium, with the technique side that (160~250 DEG C) are modified processing to timber under hot conditions
Method.And a kind of method that high-temperature heat treatment is actively modified as physics, any chemical agent is not used, passes through and changes timber
Chemical component and biological structure, are effectively improved timber moisture absorption moisture absorption phenomenon, improve wood dimensional stability, are changed colour enhancing by heat
Decorative performance is a kind of high-efficiency environment friendly Wood Property Improvement approved by consumer.But, wood modified by high-temperature heat treatment
Chemical component, the structure of material change, so that wood quality becomes fragile, density reduces, and intensity is remarkably decreased, and especially hold screw
Power is impaired serious, and loss late is up to 45%, has seriously affected the final product quality of high-temperature heat treatment material, significantly limits heat treatment
The use scope of timber is only used for the field not high to mechanical property requirements such as ornament materials.
For the big technical problem of high-temperature heat treatment material loss of strength, common solution route is to join with other method of modifying
It closes.Chinese patent " CN102107447A " discloses " a kind of wooden profile material and preparation method thereof ", by saw lumber, drying, scrapes
After step, heat pressing compact is carried out to timber using 140~200 DEG C of heating platens, then respectively 160~200 DEG C and 200~
It is carbonized and is carbonized in advance respectively under conditions of 225 DEG C, finally cooling, control moisture content obtains profile.Although the method can
The intensity of timber is effectively improved, but process is cumbersome, the period is long, and compression compactization can bring the volume of timber to waste, still cannot be efficient
Solve the problems, such as that high-temperature heat treatment material loss of strength is big.Chinese patent " CN104924383A " discloses that " a kind of raising timber is strong
The modified technique of degree and weatherability " will after preparing maceration extract as raw material using cyanurotriamide modified urea resin and other modifying agent
After timber carries out vacuum pressed impregnation in the impregnating autoclave of sealing, then by the timber after drying process under vacuum conditions into
Row heat treatment.Although this method can significantly improve the intensity and weatherability of timber, there are treatment process addition chemistry
Medicament is easy the problem of polluting the environment.Meanwhile existing heat treatment method, wood is mainly realized by control medium temperature
Material heat modification, this also leads, and existing heat treatment method is insensitive to treatment temperature control, this easily causes heat-treated wood batch
Between the big problem of material sex differernce, influence final product quality and subsequent use.
Summary of the invention
In order to solve above-mentioned the deficiencies in the prior art and disadvantage, primary and foremost purpose of the present invention is to provide a kind of environmental protection
The oak of high-strength hot processing.
Another object of the present invention is to provide the method for modifying of the oak of above-mentioned environment-friendly high-intensity heat treatment.This method exists
The thermally-denatured process of high temperature, using the control heating rate of medium and timber sandwich layer in the temperature rise period and the cooling in temperature-fall period
The method of rate highly shortened timber in the thermal degradation time of hot stage, thus achieve the purpose that reduce loss of strength,
Overcome pollution problem existing in the prior art and technical problem that obtained improved wood strength reduction is excessive.
The purpose of the present invention is realized by following technical proposals:
A kind of rubber wood timber of environment-friendly high-intensity heat treatment, the color difference Δ E* of the rubber wood timber of the environment-friendly high-intensity heat treatment are
18~30, density is 0.62~0.68g/cm3, moisture content is 6~6.3%；Parallel-to-grain compressive strength is 38~45MPa, holds screw
Power is 1800~2200N.
The method of modifying of the rubber wood timber of the environment-friendly high-intensity heat treatment, comprises the following specific steps that:
S1. it dries: dry bulb in kiln is heated up I to 110~120 DEG C, wet bulb heats up II to 90~100 DEG C, rubber wood timber timber
Core layer temperature heats up III to 100~110 DEG C, and temperature-rise period guarantees that the temperature difference of dry bulb and wet bulb is 15~20 DEG C, dry-bulb temperature and
The temperature difference of rubber wood timber timber sandwich layer is 0~10 DEG C；
S2. damping: dry-bulb temperature is maintained at 120~125 DEG C, the temperature of rubber wood timber timber sandwich layer is maintained at 115~125
DEG C, wet-bulb temperature heats up IV to 100~110 DEG C；
S3. heat up: dry bulb heats up V to 180~220 DEG C in kiln, and wet-bulb temperature is maintained at 100~110 DEG C；Rubber wood timber wood
Material sandwich layer heats up VI to 180~220 DEG C, and the temperature difference of dry-bulb temperature and rubber wood timber timber sandwich layer is 5~20 DEG C；
S4. keep the temperature: dry-bulb temperature is maintained at 180~220 DEG C, and wet-bulb temperature is maintained at 100~110 DEG C, rubber wood timber timber
Core layer temperature is maintained at 180~220 DEG C, and soaking time is 1~3h；The temperature difference of dry-bulb temperature and rubber wood timber timber sandwich layer is 0~8
℃；
S5. the low damage temperature with high efficiency of intensity: after heat preservation, dry-bulb temperature cools down I to 120~160 DEG C, rubber wood timber timber core
Layer greenhouse cooling II to 120~155 DEG C, wet-bulb temperature are maintained at 100~108 DEG C；Dry-bulb temperature and rubber wood timber timber sandwich layer
The temperature difference is 5~20 DEG C；
S6. cool down: the temperature of dry bulb, wet bulb and rubber wood timber timber sandwich layer is down to 60~80 DEG C respectively, takes out plate, obtains
The rubber wood timber of environment-friendly high-intensity heat treatment.
Preferably, described in step S1 heating I rate be 10~30 DEG C/h, heat up II rate be 20~23 DEG C/h,
The rate of heating III is 5~30 DEG C/h；IV rate described in step S2 is 20~23 DEG C/h；Heating V described in step S3
Rate be 15~30 DEG C/h, heat up VI rate be 10~25 DEG C/h；Described in step S5 cooling I rate be 3~5 DEG C/
Min, cool down II rate be 2~3 DEG C/min.
It is further preferable that described in step S1 heating I rate be 20~25 DEG C/h, heat up II rate be 15~20
DEG C/h, heat up III rate be 8~25 DEG C/h；IV rate described in step S2 is 15~20 DEG C/h；It is risen described in step S3
Temperature V rate be 20~25 DEG C/h, heat up VI rate be 18~22 DEG C/h；The rate of cooling I described in step S5 is 1~5
DEG C/min, cool down II rate be 0.5~3 DEG C/min.
Preferably, the density of rubber wood timber described in step S1 is 0.7~0.75g/cm3, initial aqueous rate be 12~
18%.
Preferably, wet-bulb temperature described in step S2 heats up IV to 103~108 DEG C；Dry-bulb temperature is maintained at 120~
122℃；Rubber wood timber timber core layer temperature is maintained at 120~122 DEG C.
Preferably, dry bulb heats up III to 190~210 DEG C in kiln described in step S3, and wet-bulb temperature is maintained at 103~
108 DEG C, rubber wood timber timber sandwich layer heats up VI to 190~210 DEG C, and the temperature difference of dry-bulb temperature and timber sandwich layer is 5~15 DEG C.
Preferably, soaking time described in step S4 is 1.5~2h, and the temperature difference of dry-bulb temperature and timber sandwich layer is 0~5
℃。
Preferably, dry-bulb temperature described in step S5 is cooled to dry-bulb temperature and is cooled to 100~110 DEG C, wet-bulb temperature
It is maintained at 103~108 DEG C；Timber core layer temperature is cooled to 120~125 DEG C；The temperature difference of dry-bulb temperature and rubber wood timber timber sandwich layer
It is 5~15 DEG C.
Compared with prior art, the invention has the following advantages:
1. the present invention shortens timber in hot stage by the rate of temperature fall in control high-temperature heat treatment process high temperature stage
Inessential modification time guaranteeing improved stability to reach to reduce the thermal decomposition degree and energy consumption of timber
Meanwhile reducing loss of strength and the energy of timber, effectively improve production efficiency.
2. the present invention by control timber core layer temperature, using among the temperature rise period twice damping step and two
Temperature rise period uses different heating rates, overcomes the deficiency that cracking is generated when timber is rapidly heated, to heat up improving
Efficiency, while shortening the heating-up time, loss of strength caused by preventing wood degradation excessive and since wood internal stress remnants make
At defects in timber, to improve timber stability.
3. the present invention carries out high-temperature heat treatment, behaviour by control medium and the rate temperature change of timber sandwich layer, to timber
Work is more flexible, convenient, and accurately, to more accurately control heat_treated wood process, the wood performance made is more consistent.
Specific embodiment
The contents of the present invention are further illustrated combined with specific embodiments below, but should not be construed as limiting the invention.
Embodiment 1
The present embodiment is modified processing to Thailand's rubber wood timber, and the rubber wood timber density used is 0.7g/cm3, moisture content is
14%.Parallel-to-grain compressive strength is 47.92MPa, supine human body 2271.43N.
(1) drying stage: dry-bulb temperature rises to 120 DEG C from room temperature in kiln, and heating rate is 30 DEG C/h；Timber core layer temperature
110 DEG C are risen to from room temperature, heating rate is 25 DEG C/h；Temperature-rise period guarantees that dry, wet-bulb depression is 20 DEG C, dry-bulb temperature and timber
The sandwich layer temperature difference is 10 DEG C.
(2) the damping stage: wet-bulb temperature is rapidly heated to 104 DEG C, and dry-bulb temperature is maintained at 120 DEG C, timber core layer temperature
It is maintained at 120 DEG C.
(3) temperature rise period: dry-bulb temperature is continuously heating to 210 DEG C in kiln, and heating rate is 25 DEG C/h；Wet-bulb temperature is kept
At 104 DEG C；Timber sandwich layer is warming up to 210 DEG C, and heating rate is 20 DEG C/h；Dry-bulb temperature and the timber sandwich layer temperature difference in temperature-rise period
It is 13 DEG C.
(4) holding stage: dry-bulb temperature is maintained at 210 DEG C, and wet-bulb temperature is maintained at 104 DEG C, and timber core layer temperature is kept
At 210 DEG C, soaking time 2h, dry-bulb temperature and the timber sandwich layer temperature difference are 0 DEG C.
(5) the intensity low damage temperature with high efficiency stage: after heat preservation, dry-bulb temperature is cooled to 105 DEG C, and rate of temperature fall is 3 DEG C/
min；Timber core layer temperature is cooled to 122 DEG C, and rate of temperature fall is 2.5 DEG C/min；Wet-bulb temperature is maintained at 104 DEG C, dry-bulb temperature
It is 17 DEG C with the timber sandwich layer temperature difference.
(6) cooling stage: dry bulb, wet bulb, timber core layer temperature are cooled to 60 DEG C, take out plate, and heat treatment rubber is made
Wood.
Referring to GB/T1931-2009 " Method for determination of the moisture content of wood ", " the Density Determination side GB/T1936.1-2009
Method " equilibrium moisture content and density of the measurement timber in the environment of temperature is 20 DEG C, humidity is 65%；Referring to GB/T1935-
2009 " Method of testing in compressive strength parallel to grain of wood ", GB/T17657-2013 " wood-based plate and the test of face artificial board physicochemical property
Method " respectively measure timber parallel-to-grain compressive strength and supine human body.Utilize being handled for full-automatic colour difference meter measurement timber
Front and back L*, a*, b* value calculates color difference Δ E* using formula (1).
Wherein, in formula: Δ E* is value of chromatism, and lightness difference, Δ a* are green axis chromaticity red before and after the processing to Δ L* before and after the processing
Index difference value, Δ b* are champac axis chromaticity index difference value before and after the processing.Δ L* numerical value, which is positive, indicates partially white, and Δ L* numerical value is negative table
Show partially black；Δ a* numerical value, which is positive, indicates partially red, and Δ a* numerical value, which is negative, indicates partially green；Δ b* numerical value, which is positive, indicates partially yellow, Δ b* number
Value, which is negative, indicates partially blue.
The moisture content of above-mentioned gained heat treatment rubber wood timber is 6.04%, density 0.63g/cm3, Δ E* be 29.72.Rift grain
Compression strength is 38.76MPa, and supine human body 1821.73N, loss late is respectively 19.12%, 19.80%.
Embodiment 2
The present embodiment is modified processing to Thailand's rubber wood timber, and the rubber wood timber density used is 0.72g/cm3, moisture content is
13.6%.Parallel-to-grain compressive strength is 49.34MPa, supine human body 2319.21N.
(1) drying stage: dry-bulb temperature rises to 120 DEG C from room temperature in kiln, and heating rate is 25 DEG C/h；Timber core layer temperature
110 DEG C are risen to from room temperature, heating rate is 25 DEG C/h；Temperature-rise period guarantees that dry, wet-bulb depression is 20 DEG C, dry-bulb temperature and timber
The sandwich layer temperature difference is 10 DEG C.
(2) the damping stage: wet-bulb temperature is rapidly heated to 104 DEG C, and dry-bulb temperature is maintained at 120 DEG C, timber core layer temperature
It is maintained at 120 DEG C.
(3) temperature rise period: dry-bulb temperature is continuously heating to 200 DEG C in kiln, and heating rate is 28 DEG C/h；Wet-bulb temperature is kept
At 104 DEG C；Timber sandwich layer is warming up to 200 DEG C, and heating rate is 21 DEG C/h；Dry-bulb temperature and the timber sandwich layer temperature difference in temperature-rise period
It is 6 DEG C
(4) holding stage: dry-bulb temperature is maintained at 200 DEG C, and wet-bulb temperature is maintained at 104 DEG C, and timber core layer temperature is kept
At 200 DEG C, soaking time 1.5h, dry-bulb temperature and the timber sandwich layer temperature difference are 0 DEG C.
(5) the intensity low damage temperature with high efficiency stage: after heat preservation, dry-bulb temperature is cooled to 102 DEG C, and rate of temperature fall is 5 DEG C/
min；Timber core layer temperature is cooled to 117 DEG C, and rate of temperature fall is 2.8 DEG C/min；Wet-bulb temperature is maintained at 104 DEG C, dry-bulb temperature
It is 15 DEG C with the timber sandwich layer temperature difference.
(6) cooling stage: dry bulb, wet bulb, timber core layer temperature are cooled to 65 DEG C, take out plate, and heat treatment rubber is made
Wood.
Referring to GB/T1931-2009 " Method for determination of the moisture content of wood ", " the Density Determination side GB/T1936.1-2009
Method " equilibrium moisture content and density of the measurement timber in the environment of temperature is 20 DEG C, humidity is 65%；Referring to GB/T1935-
2009 " Method of testing in compressive strength parallel to grain of wood ", GB/T17657-2013 " wood-based plate and the test of face artificial board physicochemical property
Method " respectively measure timber parallel-to-grain compressive strength and supine human body.Utilize being handled for full-automatic colour difference meter measurement timber
Front and back L*, a*, b* value calculates color difference Δ E* using formula (1).
The moisture content of above-mentioned gained heat treatment rubber wood timber is 6.13%, density 0.68g/cm3, Δ E* be 26.94.Rift grain
Compression strength is 43.94MPa, and supine human body 2060.21N, loss late is respectively 10.94%, 11.17%.
Embodiment 3
Processing is modified to Thailand's rubber wood timber using this method.The rubber wood timber density used is 0.73g/cm3, moisture content
It is 12.9%.Parallel-to-grain compressive strength is 48.69MPa, supine human body 2274.03N.
(1) drying stage: dry-bulb temperature rises to 120 DEG C from room temperature in kiln, and heating rate is 22 DEG C/h；Timber core layer temperature
110 DEG C are risen to from room temperature, heating rate is 21 DEG C/h；Temperature-rise period guarantees that dry, wet-bulb depression is 20 DEG C, dry-bulb temperature and timber
The sandwich layer temperature difference is 7 DEG C.
(2) the damping stage: wet-bulb temperature is rapidly heated to 103 DEG C, and dry-bulb temperature is maintained at 120 DEG C, timber core layer temperature
It is maintained at 120 DEG C.
(3) temperature rise period: dry-bulb temperature is continuously heating to 190 DEG C in kiln, and heating rate is 22 DEG C/h；Wet-bulb temperature is kept
At 103 DEG C；Timber sandwich layer is warming up to 190 DEG C, and heating rate is 18 DEG C/h；Dry-bulb temperature and the timber sandwich layer temperature difference are 16 DEG C.
(4) holding stage: dry-bulb temperature is maintained at 190 DEG C, and wet-bulb temperature is maintained at 103 DEG C, and timber core layer temperature is kept
At 190 DEG C, soaking time 1.5h, dry-bulb temperature and the timber sandwich layer temperature difference are 0 DEG C.
(5) the intensity low damage temperature with high efficiency stage: after heat preservation, dry-bulb temperature is cooled to 100 DEG C, and rate of temperature fall is 5 DEG C/
min；Timber core layer temperature is cooled to 109 DEG C, and rate of temperature fall is 2.4 DEG C/min；Wet-bulb temperature is maintained at 104 DEG C；Dry-bulb temperature
It is 9 DEG C with the timber sandwich layer temperature difference.
(6) cooling stage: dry bulb, wet bulb, timber core layer temperature are cooled to 60 DEG C, take out plate, and heat treatment rubber is made
Wood.
Referring to GB/T1931-2009 " Method for determination of the moisture content of wood ", " the Density Determination side GB/T1936.1-2009
Method " equilibrium moisture content and density of the measurement timber in the environment of temperature is 20 DEG C, humidity is 65%；Referring to GB/T1935-
2009 " Method of testing in compressive strength parallel to grain of wood ", GB/T17657-2013 " wood-based plate and the test of face artificial board physicochemical property
Method " respectively measure timber parallel-to-grain compressive strength and supine human body.Utilize being handled for full-automatic colour difference meter measurement timber
Front and back L*, a*, b* value calculates color difference Δ E* using formula (1).
The moisture content of above-mentioned gained heat treatment rubber wood timber is 6.3%, density 0.68g/cm3, Δ E* be 18.Rift grain resistance to compression
Intensity is 44.67MPa, and supine human body 2197.37N, loss late is respectively 8.25%, 3.37%.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, it is other it is any without departing from the spirit and principles of the present invention made by change, modification, substitution, combination and simplify,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (9)
1. a kind of rubber wood timber of environment-friendly high-intensity heat treatment, which is characterized in that the rubber wood timber of the environment-friendly high-intensity heat treatment
Color difference Δ E* is 18~30, and density is 0.62~0.68g/cm3, moisture content is 6~6.3%；Parallel-to-grain compressive strength be 38~
45MPa, supine human body are 1800~2200N.
2. the method for modifying of the rubber wood timber of environment-friendly high-intensity heat treatment according to claim 1, which is characterized in that including such as
Lower specific steps:
S1. it dries: dry bulb in kiln is heated up I to 110~120 DEG C, wet bulb heats up II to 90~100 DEG C, rubber wood timber timber sandwich layer
Temperature heats up III to 100~110 DEG C, and temperature-rise period guarantees that the temperature difference of dry bulb and wet bulb is 15~20 DEG C, dry-bulb temperature and rubber
The temperature difference of timber sandwich layer is 0~10 DEG C；
S2. damping: being maintained at 120~125 DEG C for dry-bulb temperature, and the temperature of rubber wood timber timber sandwich layer is maintained at 115~125 DEG C,
Wet-bulb temperature heats up IV to 100~110 DEG C；
S3. heat up: dry bulb heats up V to 180~220 DEG C in kiln, and wet-bulb temperature is maintained at 100~110 DEG C；Rubber wood timber timber core
The temperature difference of VI to 180~220 DEG C of layer heating, dry-bulb temperature and rubber wood timber timber sandwich layer is 5~20 DEG C；
S4. keep the temperature: dry-bulb temperature is maintained at 180~220 DEG C, and wet-bulb temperature is maintained at 100~110 DEG C, rubber wood timber timber sandwich layer
Temperature is maintained at 180~220 DEG C, and soaking time is 1~3h；The temperature difference of dry-bulb temperature and rubber wood timber timber sandwich layer is 0~8 DEG C；
S5. the low damage temperature with high efficiency of intensity: after heat preservation, dry-bulb temperature cools down I to 120~160 DEG C, rubber wood timber timber sandwich layer temperature
II to 120~155 DEG C of degree cooling, wet-bulb temperature is maintained at 100~108 DEG C；The temperature difference of dry-bulb temperature and rubber wood timber timber sandwich layer
It is 5~20 DEG C；
S6. cool down: the temperature of dry bulb, wet bulb and rubber wood timber timber sandwich layer is down to 60~80 DEG C respectively, takes out plate, obtains environmental protection
The rubber wood timber of high-strength hot processing.
3. the method for modifying of the rubber wood timber of environment-friendly high-intensity heat treatment according to claim 2, which is characterized in that step S1
Described in heating I rate be 10~30 DEG C/h, heat up II rate be 20~23 DEG C/h, heat up III rate be 5~30 DEG C/
h；IV rate described in step S2 is 20~23 DEG C/h；The rate of heating V described in step S3 is 15~30 DEG C/h, heating
VI rate is 10~25 DEG C/h；Described in step S5 cooling I rate be 3~5 DEG C/min, cool down II rate be 2~3
℃/min。
4. the method for modifying of the rubber wood timber of environment-friendly high-intensity heat treatment according to claim 3, which is characterized in that step S1
Described in heating I rate be 20~25 DEG C/h, heat up II rate be 15~20 DEG C/h, heat up III rate be 8~25 DEG C/
h；IV rate described in step S2 is 15~20 DEG C/h；The rate of heating V described in step S3 is 20~25 DEG C/h, heating
VI rate is 18~22 DEG C/h；Described in step S5 cooling I rate be 1~5 DEG C/min, cool down II rate be 0.5~3
℃/min。
5. the method for modifying of the rubber wood timber of environment-friendly high-intensity heat treatment according to claim 2, which is characterized in that step S1
Described in rubber wood timber density be 0.7~0.75g/cm3, initial aqueous rate is 12~18%.
6. the method for modifying of the rubber wood timber of environment-friendly high-intensity heat treatment according to claim 2, which is characterized in that step S2
Described in wet-bulb temperature heat up IV to 103~108 DEG C；Dry-bulb temperature is maintained at 120~122 DEG C；Rubber timber core layer temperature
It is maintained at 120~122 DEG C.
7. the rubber wood timber of environment-friendly high-intensity heat treatment according to claim 2, which is characterized in that kiln described in step S3
Interior dry bulb heats up III to 190~210 DEG C, and wet-bulb temperature is maintained at 103~108 DEG C, and rubber wood timber timber sandwich layer heating VI to 190~
210 DEG C, the temperature difference of dry-bulb temperature and timber sandwich layer is 5~15 DEG C.
8. the method for modifying of the rubber wood timber of environment-friendly high-intensity heat treatment according to claim 2, which is characterized in that step S4
Described in soaking time be 1.5~2h, the temperature difference of dry-bulb temperature and timber sandwich layer is 0~5 DEG C.
9. the method for modifying of the rubber wood timber of environment-friendly high-intensity heat treatment according to claim 2, which is characterized in that in rapid S5
The dry-bulb temperature is cooled to dry-bulb temperature and is cooled to 100~110 DEG C, and wet-bulb temperature is maintained at 103~108 DEG C；Timber core
Layer greenhouse cooling is to 120~125 DEG C；The temperature difference of dry-bulb temperature and rubber timber sandwich layer is 5~15 DEG C.
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