CN101116984B - Method for reducing the moisture percentage of wood materials to zero by using paraffin wax heat-treated process - Google Patents
Method for reducing the moisture percentage of wood materials to zero by using paraffin wax heat-treated process Download PDFInfo
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- CN101116984B CN101116984B CN200710026038A CN200710026038A CN101116984B CN 101116984 B CN101116984 B CN 101116984B CN 200710026038 A CN200710026038 A CN 200710026038A CN 200710026038 A CN200710026038 A CN 200710026038A CN 101116984 B CN101116984 B CN 101116984B
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Abstract
The invention relates to a heat treating method of paraffin wax to reduce the moisture content to the nearest zero, comprising the following steps: firstly, lumber is delivered to a heat treating furnace which comprises a lignum treating chamber, cut into lumber pieces; the pieces then are piled together, the lumber treating chamber is heated then to make the paraffin wax pre-positioned in the treating chamber melt into liquid paraffin wax to submerge the lumber pieces. Then the temperature in the furnace is heated to 140-160 DEG C, for 44 to 58 hours. Resin is added into the furnace to increase the temperature into 175-185 DEG C, for 67 to 77 hours. Heating stopping, the lumber pieces is cooled down to 58-110 DEG C and discharged out of the furnace. The resin takes up 10-50 parts by weight against the 100 parts by weight of the paraffin wax. The lumber after being processed by the method of the invention has a rate of moisture content more than 0 and less than 0.01 percent.
Description
Technical field
The present invention relates to a kind of timber heat-treating methods, especially relate to a kind of moisture content that utilizes the paraffin heat-treated wood to make timber and approach zero method.Belong to the woodwork technical field.
Background technology
Renewable, easy processing that timber has, natural a series of advantages such as beautiful decorative pattern are arranged, be widely used in various uses such as building structure, ornament materials, furniture.As a kind of natural green environment-friendly materials, timber also exists some natural defectives, has anisotropy as timber, weatherability difference etc. but simultaneously.Therefore timber is when bigger medium-term and long-term use of environment of humidity and variations in temperature, because the anisotropy of shrinking makes timber produce various defectives easily, as distortion and cracking.In the higher environment of humidity ratio during (as place outdoor, that often directly contact with water) use, the easy variable color of timber, rotten etc.These defectives have seriously restricted the scope of application of timber to a great extent, have shortened its service life.For a long time, people are being devoted to study stable, the weather-proof method of corrosion resistant of timber size that makes always.People once attempted ining all sorts of ways timber is processed: people adopt top finishing or veneer or barbecue timber, but processing only can be protected or charing on the top layer like this, can't improve the dimensional stability and the endurance quality of timber integral body; At present, adopt the medicament method of impregnating to carry out the disposed of in its entirety of timber more, but the toxic substance of chemical preservation medicament influences user's safety and health possibly, and cause the problem of environmental protection aspect.
In recent years, people more and more tend to use non-chemically the method for medicament to handle timber now.Wherein, the ultrahigh temperature heat treatment method of timber is a kind of Wood treatment method of very effective and environmental protection.In the drying of wood was handled, temperature＞100 ℃ were conventional drying, and 100～150 ℃ is high temperature drying, and＞150 ℃ is the superhigh temperature drying.In the superhigh temperature heat treatment process, timber is in being close to or higher than 200 ℃ superhigh temperature low oxygen content environment, after continuing to handle a period of time, hemicellulose degraded in the timber, suction in the wood cell wall/wet basis group (hydroxyl) reduces, and hemicellulase is destroyed, the nutritional labeling pyrolysis, thereby hydroscopicity of wood can be descended, its dimensional stability and biological damage are improved.The oxygen barrier protective medium difference that is adopted during according to superhigh temperature heat treatment, the superhigh temperature heat treatment of timber mainly is divided three classes: steam treatment technique, inert gas treatment process and hot oil processing technology.
Steam treatment technique is to adopt steam to stop combustion of wood, and its treatment temperature is about 160 ℃～240 ℃.Handle the wood dimensional stability height of gained, weather-proof and corrosion resistance and good.But water vapour can react with the main component cellulose of timber under higher high temperature, makes its degraded, causes the bigger decline of strength of wood.This has limited to the purposes of the timber of this method processing gained, especially in the purposes aspect structural bearing component.
The inert gas treatment process has the inert gas of nitrogen of employing low oxygen content and so on as the oxygen barrier protective medium.Its processing procedure is carried out in being full of the specially treated chamber of nitrogen, and timber is heated to about 210 ℃ to 240 ℃.The hydroscopicity of wood of handling gained can obviously reduce, the dimensional stability height, and this process can destroy the required nutrition of rot fungi, and decay resistance is better.But employing nitrogen is done protective medium, can cause the wood surface sclerosis, thereby wood surface can not change with the shrink/expanded of timber, causes the intensity of timber to produce destruction greatly, and the increase of timber fragility, and the modulus of rupture is lost more than 40%.
Hot oil processing technology has employing deep fat (plant crude oil) as spacer medium.Timber and oxygen are fully isolated in the processing procedure, and the heat transference efficiency height.Its treatment temperature is generally at about 180～220 ℃.The durability of wood of handling gained is good, and oil absorption is little, and intensity is also higher relatively.But there is distinct disadvantage in this method, and promptly the processing cost height can pollute wood surface, and has the purification of waste oil and the problem of waste treatment aspect.
The concrete treatment process that adopts of superhigh temperature heat treatment comprises protective medium, pressure, flow process, temperature, time, the rate of heat addition, first moisture content or the like, all can influence final performance and the production cost and the efficient of Wood products.
People urgently wish to find a kind of timber superhigh temperature Technology for Heating Processing, can eliminate all deficiencies of above-mentioned prior art.
Summary of the invention
The object of the present invention is to provide a kind of moisture content that utilizes the paraffin heat-treated wood to make timber to approach zero method, its Wood products of producing is dimensional stability and good endurance not only, and can make strength of wood height, wood surface after the processing can not harden, can not shrinkage cracking/expansion, can not pollute wood surface.
The object of the present invention is achieved like this: a kind of moisture content that utilizes the paraffin heat-treated wood to make timber approaches zero method, and this method mainly comprises following processing step:
At first, timber is put into a heat-treatment furnace, described timber heat-treatment furnace comprises treating of wood chamber, heater, bell, venthole and device for monitoring temperature, described timber is split into sheet material by required specification, and sheet material is piled stack of lumber, the indoor paraffin of placing in advance of described treating of wood, and heating makes paraffin be melt into wax liquid, make wax liquid submergence stack of lumber after stack of lumber places treating of wood indoor, close heat-treatment furnace bell and venthole, carry out following operation then:
A, phase I hyperthermic treatment
Timber is carried out the phase I hyperthermic treatment, make the interior temperature of stove rise to 140～160 ℃, the heating-up time was controlled at 44～58 hours;
B, second stage hyperthermic treatment
After the phase I is warming up to 140～160 ℃, in stove, add resin, carry out the second stage hyperthermic treatment then, make the interior temperature of stove rise to 175～185 ℃, the heating-up time was controlled at 67～77 hours;
C, cooling stage
After second stage is warming up to 175～185 ℃, stop heating, come out of the stove when being cooled to 58～110 ℃ then;
Described resin is the 10-50 weight portion by paraffin dosage 100 weight portions in the stove.
In first and second hyperthermic treatment stage, moisture in the timber begins and constantly evaporation, and the capillary in the wood cell wall begins continuous expanding, and wax liquid then begins and constantly infiltrates through in the capillary of timber, realize the displacement of moisture and wax liquid, make the moisture content in the timber approach zero.
Described resin is that rosin is or/and modified rosin resin.
Interpolation rosin and modified rosin resin can improve the adhesion strength between paraffin and the lumber fibre, and the adding of rosin mainly is bonding strength, flexibility and the bond properties that increases resin.Rosin is as the natural resin of wide material sources, can make the timber after the heat treatment easily dry, smooth surface, and feel is smooth, does not ftracture; The interpolation modified rosin resin can also make the drying of wood after the heat treatment fast, the gloss height, and flintiness is good.Like this can so that in the wood working industry back road processing and forming.
By heat treatment method of the present invention, its Wood products of producing is dimensional stability and good endurance not only, and can make strength of wood height, wood surface after the processing can not harden, can not shrinkage cracking/expansion, can not pollute wood surface.Particularly can make 0＜moisture content＜0.1% of handling in the timber of back.
The specific embodiment
Embodiment 1:
The present invention relates to a kind of method of utilizing paraffin that timber is heat-treated, this method mainly comprises following processing step:
At first, timber is put into a timber heat-treatment furnace, this timber heat-treatment furnace comprises treating of wood chamber, combustion chamber, fire door, bell, venthole, blower fan and device for monitoring temperature etc.Described timber is split into sheet material by required specification, and sheet material is ricked, the indoor paraffin of placing in advance of described treating of wood, and heating makes paraffin be melt into wax liquid.Described timber makes wax liquid submergence sheet material buttress after putting into the treating of wood chamber, closes heat-treatment furnace bell and venthole.Carry out following processing step then successively:
A, phase I hyperthermic treatment
Timber is carried out the phase I hyperthermic treatment, make the interior temperature of stove rise to 140～160 ℃, the heating-up time was controlled at 44～58 hours, and the moisture content in the timber is 35～40% at this moment;
B, second stage hyperthermic treatment
After the phase I is warming up to 140～160 ℃, in stove, add rosin and modified rosin resin, open venthole simultaneously, carry out the second stage hyperthermic treatment then, make the interior temperature of stove rise to 175～185 ℃, heating-up time was controlled at 67～77 hours, at this moment 0＜moisture content＜0.1% in the timber;
C, cooling stage
After second stage is warming up to 175～185 ℃, stop heating, come out of the stove when being cooled to 58～110 ℃ then.Concrete chilling temperature is decided according to used melting point of paraffin wax, the fusing point height, the drop temperature height, on the contrary drop temperature is low, total discharging principle be make paraffin also not become solid near paraffin melting point before, come out of the stove best.
The addition of described rosin and modified rosin resin is respectively 20 weight portions and 30 weight portions by paraffin dosage 100 weight portions in the stove.The concrete dosage of rosin and modified rosin resin is decided according to the material of timber, and density of wood is big, and is reinforced many, otherwise dosage is few.
Embodiment 2:
Rosin among the embodiment 1 and modified rosin resin are all adopted rosin.All the other are all with embodiment 1.
Embodiment 3:
Rosin among the embodiment 1 and modified rosin resin are all adopted modified rosin resin.All the other are all with embodiment 1.
Rosin of the present invention can be natural rosin (rosin), also can be limed rosin.Adopt hard, the good luster in timber softening point height, surface after limed rosin can make heat treatment.
Modified rosin resin of the present invention can be to choose any one kind of them in rosin glyceride, rosin phenolic resin, rosin pentaerythritol resin, maleic rosin resin and the Fu Ma abietic resin or several.
Claims (4)
1. a moisture content that utilizes the paraffin heat-treated wood to make timber approaches zero method, and this method mainly comprises following processing step:
At first, timber is put into a heat-treatment furnace, described timber heat-treatment furnace comprises treating of wood chamber, heater, bell, venthole and device for monitoring temperature, described timber is split into sheet material by required specification, and sheet material is piled stack of lumber, the indoor paraffin of placing in advance of described treating of wood, and heating makes paraffin be melt into wax liquid, make wax liquid submergence stack of lumber after stack of lumber places treating of wood indoor, close heat-treatment furnace bell and venthole, carry out following operation then:
A, phase I hyperthermic treatment
Timber is carried out the phase I hyperthermic treatment, make the interior temperature of stove rise to 140～160 ℃, the heating-up time was controlled at 44～58 hours;
B, second stage hyperthermic treatment
After the phase I is warming up to 140～160 ℃, in stove, add resin, carry out the second stage hyperthermic treatment then, make the interior temperature of stove rise to 175～185 ℃, the heating-up time was controlled at 67～77 hours;
C, cooling stage
After second stage is warming up to 175～185 ℃, stop heating, come out of the stove when being cooled to 58～110 ℃ then;
Described resin is the 10-50 weight portion by paraffin dosage 100 weight portions in the stove,
Described resin is that rosin is or/and modified rosin.
2. a kind of moisture content that utilizes the paraffin heat-treated wood to make timber according to claim 1 approaches zero method, and it is characterized in that: the weight ratio of described rosin and modified rosin is 2: 2.5～3.5.
3. a kind of moisture content that utilizes the paraffin heat-treated wood to make timber according to claim 1 and 2 approaches zero method, and it is characterized in that: described rosin is natural rosin or limed rosin.
4. a kind of moisture content that utilizes the paraffin heat-treated wood to make timber according to claim 1 and 2 approaches zero method, it is characterized in that: described modified rosin is to choose any one kind of them in rosin glyceride, rosin phenolic resin, rosin pentaerythritol resin, maleic rosin resin and the Fu Ma abietic resin or several.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200710026038A CN101116984B (en) | 2007-08-15 | 2007-08-15 | Method for reducing the moisture percentage of wood materials to zero by using paraffin wax heat-treated process |
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| CN200710026038A CN101116984B (en) | 2007-08-15 | 2007-08-15 | Method for reducing the moisture percentage of wood materials to zero by using paraffin wax heat-treated process |
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| CN101116984A CN101116984A (en) | 2008-02-06 |
| CN101116984B true CN101116984B (en) | 2010-05-19 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102172935A (en) * | 2011-01-24 | 2011-09-07 | 南通盛林易分子木业有限公司 | Treating agent for producing easy molecular wood and production method thereof |
| CN102152355B (en) * | 2011-01-24 | 2013-11-20 | 南通盛林易分子木业有限公司 | Production method of labile molecule wood |
| CN104875254A (en) * | 2015-06-24 | 2015-09-02 | 南通亚振东方家具有限公司 | Method for preparing modified wood by combining paraffin and resin |
| CN106182281B (en) * | 2015-09-29 | 2018-08-07 | 北京林业大学 | The collection system and method for VOC during a kind of heat_treated wood |
| CN106313220B (en) * | 2016-08-22 | 2018-07-03 | 伊春市美江木艺有限责任公司 | Rosin oil immersion woodworking |
| CN108638262A (en) * | 2018-06-11 | 2018-10-12 | 阜南县永兴工艺品有限公司 | A method of improving high intensity herba fibraureae recisae material toughness |
| CA3110306A1 (en) * | 2018-09-07 | 2020-03-12 | GL One Co., Ltd. | Paraffin-reinforced wood and method for manufacturing the same |
| CN109227839B (en) * | 2018-10-19 | 2020-07-31 | 南京林业大学 | Bamboo drying and heat treatment method |
| CN109333715B (en) * | 2018-11-08 | 2021-02-02 | 福建农林大学 | Method for modifying wood through synergistic heat treatment of inorganic salt-metal eutectic system |
| CN109551592A (en) * | 2018-12-24 | 2019-04-02 | 河北滑氏红木家具有限公司 | A kind of wood material for furniture dehydrating processing method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1003432B (en) * | 1986-01-14 | 1989-03-01 | 贵州省林业科学研究所 | Method for baking wooden board with reagents for making pencils |
| RU2103163C1 (en) * | 1996-03-28 | 1998-01-27 | Федор Федорович Данилов | Method of wood modification |
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2007
- 2007-08-15 CN CN200710026038A patent/CN101116984B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1003432B (en) * | 1986-01-14 | 1989-03-01 | 贵州省林业科学研究所 | Method for baking wooden board with reagents for making pencils |
| RU2103163C1 (en) * | 1996-03-28 | 1998-01-27 | Федор Федорович Данилов | Method of wood modification |
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