CN107471362A - A kind of processing method for strengthening Larch mechanical property - Google Patents
A kind of processing method for strengthening Larch mechanical property Download PDFInfo
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- CN107471362A CN107471362A CN201710798288.5A CN201710798288A CN107471362A CN 107471362 A CN107471362 A CN 107471362A CN 201710798288 A CN201710798288 A CN 201710798288A CN 107471362 A CN107471362 A CN 107471362A
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- larch
- pressure
- temperature
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- processing
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Classifications
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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
- B27K3/04—Impregnating in open tanks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/16—Inorganic impregnating agents
-
- 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
- B27K3/52—Impregnating agents containing mixtures of inorganic and organic 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
- B27K5/0005—Cryogenic treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/001—Heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/007—Treating of wood not provided for in groups B27K1/00, B27K3/00 using pressure
Abstract
The invention belongs to wood processing technique field, especially a kind of processing method for strengthening Larch mechanical property, specific method is as follows：（1）Larch surface clean is clean, it is immersed in calcium chloride water and soaks, take out, heats；（2）It is immersed in soaking agent and soaks, takes out, HIGH PRESSURE TREATMENT, freezing processing；（3）Steam treatment, hot-pressing drying；Do not destroy the structure and property of Larch not only, strengthen its density, effectively strengthen tensile strength, compression strength and the bending strength of timber, so that Wood mechanical property and good stability of the dimension, and there is excellent fungus and mildew resistance performance, anti-corrosive antibacterial performance reaches more than 95%, in addition, timber is not hygroscopic, moisture-resistant is swollen, and coefficient reaches more than 50%, using will not be produced after 40 years cracking, warpage phenomenon, anti-ultraviolet property is good, it is prolonged colour-fast, effectively keep the distinctive color of Larch.
Description
Technical field
The invention belongs to wood processing technique field, especially a kind of processing method for strengthening Larch mechanical property.
Background technology
Larchen timber is heavy and solid, and resistance to compression and resistant to bending intensity are big, and resistance to rotten, and wood technology value is high,
Being that electric pole, sleeper, bridge, ore pillar, vehicle, building etc. are excellent uses material, and its mechanical property is to weigh the important indicator of quality of bamboo timber,
It is the basis of timber processing and utilization；But with the development and progress of science and technology, possessed mechanical property has been in itself for Larch
The requirement of every field material can not be met, so urgently develop a kind of can effectively strengthen Larch mechanical property at present
Method, quality is used so as to effectively improve larchen utilization rate and product.
The content of the invention
A kind of in view of the above-mentioned problems, the present invention is intended to provide processing method for strengthening Larch mechanical property.
The present invention is achieved through the following technical solutions：
A kind of processing method for strengthening Larch mechanical property, specific method are as follows：
（1）Larch surface clean is clean, be immersed in mass fraction be 7% ~ 8% calcium chloride water in immersion 50 ~
60min, take out, insert heated at constant temperature under conditions of temperature is 40 ~ 44 DEG C and handle 15 ~ 17min, the heating speed with 3 ~ 4 DEG C/min
Rate is warming up to 86 ~ 90 DEG C and continues 19 ~ 21min of heated at constant temperature processing；
（2）Will be through step（1）Larch after processing is immersed in 80 ~ 90min of immersion in soaking agent, takes out, HIGH PRESSURE TREATMENT, puts
Enter cryostat under conditions of temperature is -24 ~ -22 DEG C to handle 26 ~ 30min, heat up with 1.1 ~ 1.3 DEG C/min heating rate
Continue cryostat to -3 ~ -1 DEG C and handle 18 ~ 22min；
Described soaking agent, it is made up of the raw material of following parts by weight：5.9 ~ 6.5 parts of tetrahydrofurfuryl alcohol, 2.1 ~ 2.3 parts of phenolic resin,
3.2 ~ 3.6 parts of glacial acetic acid, 1.1 ~ 1.3 parts of phosphate, 9 ~ 10 parts of calcium superphosphate, 2.6 ~ 2.8 parts of maltodextrin, 120 ~ 130 parts of water；
（3）Will be through step（2）Larch after processing insert temperature for constant temperature steam processing 34 under conditions of 260 ~ 270 DEG C ~
38min, 140 ~ 150 DEG C of continuation constant temperature steams 22 ~ 26min of processing are cooled to 6 ~ 7 DEG C/min rate of temperature fall, hot-pressing drying is
Can.
As the further scheme of invention：Step（2）Described HIGH PRESSURE TREATMENT, first under conditions of pressure is 23 ~ 25MPa
Constant pressure handles 11 ~ 13min, removes pressure 5 ~ 7min of pause, adjustment pressure is that 46 ~ 48MPa constant pressures handle 15 ~ 17min, with 3 ~ 4MPa/
Min rate of pressure reduction is depressurized to 16 ~ 18MPa and continues 8 ~ 10min of constant pressure processing.
As the further scheme of invention：Step（3）Described hot-pressing drying, first temperature be 90 ~ 95 DEG C, pressure be
Hot-pressing drying to moisture content is 36% ~ 38% under conditions of 3.3 ~ 3.5MPa, removes pressure and removes 10 ~ 15min of temperature, and it is 70 then to adjust temperature
~ 75 DEG C, pressure be that 2.1 ~ 2.3MPa hot-pressing dryings to moisture content is 7% ~ 9%.
Beneficial effects of the present invention：A kind of processing method for strengthening Larch mechanical property provided by the invention, not only
The structure and property of Larch are not destroyed, strengthens its density, and the tensile strength, compression strength and bending resistance for effectively strengthening timber are strong
Degree so that Wood mechanical property and good stability of the dimension, and there is excellent fungus and mildew resistance performance, anti-corrosive antibacterial performance reaches
More than 95%, in addition, timber is not hygroscopic, moisture-resistant is swollen, and coefficient reaches more than 50%, using will not produce cracking, warpage after 40 years
Phenomenon, anti-ultraviolet property is good, prolonged colour-fast, effectively keeps the distinctive color of Larch.
Embodiment
Illustrate the present invention with specific embodiment below, but be not limitation of the present invention.
Embodiment 1
In the embodiment of the present invention, a kind of processing method for strengthening Larch mechanical property, specific method is as follows：
（1）Larch surface clean is clean, it is immersed in the calcium chloride water that mass fraction is 7% and soaks 50min, takes
Go out, insert heated at constant temperature under conditions of temperature is 40 DEG C and handle 15min, 86 DEG C of continuation are warming up to 3 DEG C/min heating rate
Heated at constant temperature handles 19min；
（2）Will be through step（1）Larch after processing, which is immersed in soaking agent, soaks 80min, takes out, HIGH PRESSURE TREATMENT, inserts
Cryostat is handled 26min, -3 DEG C of continuation constant temperature is warming up to 1.1 DEG C/min heating rate under conditions of temperature is -24 DEG C
Freezing processing 18min；
Described soaking agent, it is made up of the raw material of following parts by weight：5.9 parts of tetrahydrofurfuryl alcohol, 2.1 parts of phenolic resin, glacial acetic acid 3.2
Part, 1.1 parts of phosphate, 9 parts of calcium superphosphate, 2.6 parts of maltodextrin, 120 parts of water；
（3）Will be through step（2）Larch after processing insert temperature for constant temperature steam under conditions of 260 DEG C handle 34min, with
6 DEG C/min rate of temperature fall is cooled to 140 DEG C and continues constant temperature steam processing 22min, hot-pressing drying.
As the further scheme of invention：Step（2）Described HIGH PRESSURE TREATMENT, it is first permanent under conditions of pressure is 23MPa
Pressure processing 11min, pressure pause 5min is removed, adjustment pressure is that 46MPa constant pressures handle 15min, is dropped with 3MPa/min rate of pressure reduction
It is depressed into 16MPa and continues constant pressure processing 8min.
As the further scheme of invention：Step（3）Described hot-pressing drying, first temperature be 90 DEG C, pressure be
Under conditions of 3.3MPa hot-pressing drying to moisture content be 36%, remove pressure and remove warm 10min, then adjust temperature be 70 DEG C, pressure be
2.1MPa hot-pressing dryings to moisture content is 7%.
Embodiment 2
In the embodiment of the present invention, a kind of processing method for strengthening Larch mechanical property, specific method is as follows：
（1）Larch surface clean is clean, it is immersed in the calcium chloride water that mass fraction is 7.5% and soaks 55min,
Take out, insert heated at constant temperature under conditions of temperature is 42 DEG C and handle 16min, be warming up to 88 DEG C with 3.5 DEG C/min heating rate
Continue heated at constant temperature processing 20min；
（2）Will be through step（1）Larch after processing, which is immersed in soaking agent, soaks 85min, takes out, HIGH PRESSURE TREATMENT, inserts
Cryostat is handled 28min, -2 DEG C of continuation constant temperature is warming up to 1.2 DEG C/min heating rate under conditions of temperature is -23 DEG C
Freezing processing 20min；
Described soaking agent, it is made up of the raw material of following parts by weight：6.2 parts of tetrahydrofurfuryl alcohol, 2.2 parts of phenolic resin, glacial acetic acid 3.4
Part, 1.2 parts of phosphate, 9.5 parts of calcium superphosphate, 2.7 parts of maltodextrin, 125 parts of water；
（3）Will be through step（2）Larch after processing insert temperature for constant temperature steam under conditions of 265 DEG C handle 36min, with
6.5 DEG C/min rate of temperature fall is cooled to 145 DEG C and continues constant temperature steam processing 24min, hot-pressing drying.
As the further scheme of invention：Step（2）Described HIGH PRESSURE TREATMENT, it is first permanent under conditions of pressure is 24MPa
Pressure processing 12min, pressure pause 6min is removed, adjustment pressure is that 47MPa constant pressures handle 16min, with 3.5MPa/min rate of pressure reduction
It is depressurized to 17MPa and continues constant pressure processing 9min.
As the further scheme of invention：Step（3）Described hot-pressing drying, first temperature be 93 DEG C, pressure be
Under conditions of 3.4MPa hot-pressing drying to moisture content be 37%, remove pressure and remove warm 13min, then adjust temperature be 73 DEG C, pressure be
2.2MPa hot-pressing dryings to moisture content is 8%.
Embodiment 3
In the embodiment of the present invention, a kind of processing method for strengthening Larch mechanical property, specific method is as follows：
（1）Larch surface clean is clean, it is immersed in the calcium chloride water that mass fraction is 8% and soaks 60min, takes
Go out, insert heated at constant temperature under conditions of temperature is 44 DEG C and handle 17min, 90 DEG C of continuation are warming up to 4 DEG C/min heating rate
Heated at constant temperature handles 21min；
（2）Will be through step（1）Larch after processing, which is immersed in soaking agent, soaks 90min, takes out, HIGH PRESSURE TREATMENT, inserts
Cryostat is handled 30min, -1 DEG C of continuation constant temperature is warming up to 1.3 DEG C/min heating rate under conditions of temperature is -22 DEG C
Freezing processing 22min；
Described soaking agent, it is made up of the raw material of following parts by weight：6.5 parts of tetrahydrofurfuryl alcohol, 2.3 parts of phenolic resin, glacial acetic acid 3.6
Part, 1.3 parts of phosphate, 10 parts of calcium superphosphate, 2.8 parts of maltodextrin, 130 parts of water；
（3）Will be through step（2）Larch after processing insert temperature for constant temperature steam under conditions of 270 DEG C handle 38min, with
7 DEG C/min rate of temperature fall is cooled to 150 DEG C and continues constant temperature steam processing 26min, hot-pressing drying.
As the further scheme of invention：Step（2）Described HIGH PRESSURE TREATMENT, it is first permanent under conditions of pressure is 25MPa
Pressure processing 13min, pressure pause 7min is removed, adjustment pressure is that 48MPa constant pressures handle 17min, is dropped with 4MPa/min rate of pressure reduction
It is depressed into 18MPa and continues constant pressure processing 10min.
As the further scheme of invention：Step（3）Described hot-pressing drying, first temperature be 95 DEG C, pressure be
Under conditions of 3.5MPa hot-pressing drying to moisture content be 38%, remove pressure and remove warm 15min, then adjust temperature be 75 DEG C, pressure be
2.3MPa hot-pressing dryings to moisture content is 9%.
Comparative example
Larch untreated control group
Using the processing method of embodiment to being processed with a collection of character identical Larch, its power is detected after processing
Learn performance, measure tensile strength parallel to grain, parallel-to-grain compressive strength, bending strength and modulus of elasticity, testing result such as table 1：
The mechanical property comparing result of the embodiment of table 1 and comparative example
| Tensile strength parallel to grain（MPa） | Parallel-to-grain compressive strength（MPa） | Bending strength（MPa） | Modulus of elasticity（GPa） | |
| Embodiment 1 | 37.71 | 32.48 | 36.93 | 22.51 |
| Embodiment 2 | 37.89 | 32.55 | 36.79 | 22.58 |
| Embodiment 3 | 37.78 | 32.43 | 36.87 | 22.54 |
| Comparative example | 19.34 | 15.32 | 17.23 | 13.77 |
As it can be seen from table 1 the mechanical property of the Larch after the processing method processing of the present invention is significantly improved.
Claims (3)
1. a kind of processing method for strengthening Larch mechanical property, it is characterised in that specific method is as follows：
（1）Larch surface clean is clean, be immersed in mass fraction be 7% ~ 8% calcium chloride water in immersion 50 ~
60min, take out, insert heated at constant temperature under conditions of temperature is 40 ~ 44 DEG C and handle 15 ~ 17min, the heating speed with 3 ~ 4 DEG C/min
Rate is warming up to 86 ~ 90 DEG C and continues 19 ~ 21min of heated at constant temperature processing；
（2）Will be through step（1）Larch after processing is immersed in 80 ~ 90min of immersion in soaking agent, takes out, HIGH PRESSURE TREATMENT, puts
Enter cryostat under conditions of temperature is -24 ~ -22 DEG C to handle 26 ~ 30min, heat up with 1.1 ~ 1.3 DEG C/min heating rate
Continue cryostat to -3 ~ -1 DEG C and handle 18 ~ 22min；
Described soaking agent, it is made up of the raw material of following parts by weight：5.9 ~ 6.5 parts of tetrahydrofurfuryl alcohol, 2.1 ~ 2.3 parts of phenolic resin,
3.2 ~ 3.6 parts of glacial acetic acid, 1.1 ~ 1.3 parts of phosphate, 9 ~ 10 parts of calcium superphosphate, 2.6 ~ 2.8 parts of maltodextrin, 120 ~ 130 parts of water；
（3）Will be through step（2）Larch after processing insert temperature for constant temperature steam processing 34 under conditions of 260 ~ 270 DEG C ~
38min, 140 ~ 150 DEG C of continuation constant temperature steams 22 ~ 26min of processing are cooled to 6 ~ 7 DEG C/min rate of temperature fall, hot-pressing drying is
Can.
2. the processing method of enhancing larchwood mechanical property according to claim 1, it is characterised in that step（2）
Described HIGH PRESSURE TREATMENT, first constant pressure handles 11 ~ 13min under conditions of pressure is 23 ~ 25MPa, removes pressure 5 ~ 7min of pause, adjustment
Pressure is that 46 ~ 48MPa constant pressures handle 15 ~ 17min, and being depressurized to 16 ~ 18MPa with 3 ~ 4MPa/min rate of pressure reduction continues at constant pressure
Manage 8 ~ 10min.
3. the processing method of enhancing larchwood mechanical property according to claim 1, it is characterised in that step（3）
Described hot-pressing drying, first hot-pressing drying to moisture content is under conditions of temperature is 90 ~ 95 DEG C, pressure is 3.3 ~ 3.5MPa
36% ~ 38%, remove pressure and remove 10 ~ 15min of temperature, then adjust temperature be 70 ~ 75 DEG C, pressure be 2.1 ~ 2.3MPa hot-pressing dryings to aqueous
Rate is 7% ~ 9%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710798288.5A CN107471362A (en) | 2017-09-07 | 2017-09-07 | A kind of processing method for strengthening Larch mechanical property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710798288.5A CN107471362A (en) | 2017-09-07 | 2017-09-07 | A kind of processing method for strengthening Larch mechanical property |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107471362A true CN107471362A (en) | 2017-12-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710798288.5A Pending CN107471362A (en) | 2017-09-07 | 2017-09-07 | A kind of processing method for strengthening Larch mechanical property |
Country Status (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108705633A (en) * | 2018-05-17 | 2018-10-26 | 阜南县富昌恒业工艺品有限公司 | A method of enhancing eggplant rattan stalk shear behavior |
| CN109571681A (en) * | 2018-12-29 | 2019-04-05 | 赛为木业（石首）有限公司 | A kind of furfuryl alcohol timber optimization liquid and preparation method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002337116A (en) * | 2001-05-14 | 2002-11-27 | Sumitomo Forestry Co Ltd | Woody fiber plate and its manufacturing method |
| CN101745951A (en) * | 2009-12-22 | 2010-06-23 | 中国林业科学研究院木材工业研究所 | Modified planted forest timber and preparation method thereof |
| CN104802262A (en) * | 2015-04-30 | 2015-07-29 | 湖南栋梁木业有限公司 | Modification technology capable of improving strength and tenacity of wood |
| CN103448116B (en) * | 2013-09-04 | 2015-12-02 | 东北林业大学 | Improve the method for mechanical stability of super-hydrophobic wood |
| CN106863498A (en) * | 2017-01-05 | 2017-06-20 | 安徽柏瑞特家居装饰品有限公司 | A kind of method for improving plank dimensional stability |
-
2017
- 2017-09-07 CN CN201710798288.5A patent/CN107471362A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002337116A (en) * | 2001-05-14 | 2002-11-27 | Sumitomo Forestry Co Ltd | Woody fiber plate and its manufacturing method |
| CN101745951A (en) * | 2009-12-22 | 2010-06-23 | 中国林业科学研究院木材工业研究所 | Modified planted forest timber and preparation method thereof |
| CN103448116B (en) * | 2013-09-04 | 2015-12-02 | 东北林业大学 | Improve the method for mechanical stability of super-hydrophobic wood |
| CN104802262A (en) * | 2015-04-30 | 2015-07-29 | 湖南栋梁木业有限公司 | Modification technology capable of improving strength and tenacity of wood |
| CN106863498A (en) * | 2017-01-05 | 2017-06-20 | 安徽柏瑞特家居装饰品有限公司 | A kind of method for improving plank dimensional stability |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108705633A (en) * | 2018-05-17 | 2018-10-26 | 阜南县富昌恒业工艺品有限公司 | A method of enhancing eggplant rattan stalk shear behavior |
| CN109571681A (en) * | 2018-12-29 | 2019-04-05 | 赛为木业（石首）有限公司 | A kind of furfuryl alcohol timber optimization liquid and preparation method |
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