CN103171014B - Technical wood and manufacture method thereof - Google Patents
Technical wood and manufacture method thereof Download PDFInfo
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- CN103171014B CN103171014B CN201110438807.XA CN201110438807A CN103171014B CN 103171014 B CN103171014 B CN 103171014B CN 201110438807 A CN201110438807 A CN 201110438807A CN 103171014 B CN103171014 B CN 103171014B
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Abstract
The invention relates to technical wood and a manufacture method thereof. The manufacture method comprises the steps of dying and drying eucalyptus and poplar veneers, conducting gum dipping and thickening on the wood veneers by using an ultrasonic vibration method, assembling gum dipping boards, conducting semi-solidification hot-pressing maintaining by using a curve die high-frequency press, conducting square slicing on the technical wood or cutting the technical wood into wood veneers, assembling the wood veneers in the same direction according to needed thickness, and conducting hot pressing and thickening. The thickness of the technical wood veneers or wood square produced by using the manufacture method is as high as 0.8-1.8kg/cm<3>, the thickness of the technical wood is more than 1.5 times of that of common technical wood, a plurality of items of physical and mechanical properties are improved by more than 1.5 times, the technical wood is not easy to crack, product durability improves to more than one time, service life of products is prolonged, and using fields of the products are extended.
Description
Technical field
The present invention relates to a kind of sham wood and preparation method thereof, particularly a kind of sham wood that can be used as surface decoration material and preparation method thereof.
Background technology
At present; along with improving constantly of living standards of the people; people to the favorable rating of woodwork and demand increasing; but; the minimizing day by day of resource can be felled along with the high-grade timber in the whole world; since the enforcement of particularly natural forest reserve engineering, timber supply and demand contradiction is more and more sharp-pointed, relies on natural timber to be difficult to meet growing demand.Simultaneously, although China greatly develops artificial forest and fast-growing woods tree lumber at present, but the softwood that artificial forest and fast-growing woods produce exists decorative value and the low problem of physical and mechanical property, especially the wearability of timber, defect that case hardness is low make the use field of softwood be subject to huge restriction.
Recombinant Wood (i.e. sham wood), also known as chemical wood, atom timber, strengthen timber, composite wood, colored timber or synthetic wood, for raw material with common wood (fast growing wood), utilize bionics principle, by the entirely wooden new decorative material that a kind of performance of common wood, fast growing wood being carried out to various modification materialization process for producing is more superior.Compared with natural material, bend hardly, do not ftracture, non-warping.Its density can manual control, and product stability can be good, and in process, it does not exist waste and the Value Loss that natural timber adds man-hour, wood comprehensive utilization rate can be brought up to more than 85%.Therefore, sham wood can solve imbalance between supply and demand and the excellent problem of low-grade wood well.
But existing Recombinant Wood veneer by bionics principle recombinant production out, and therefore timber in use exists some problems, as poor dimensional stability, easy to crack, case hardness is low.Therefore for a long time, the application of Recombinant Wood can only be made into wooden skin, carries out ornamental use.As in People's Republic of China (PRC) forestry industry standard recombinant decorative veneer LY/T1654-2006 standard, product is defined as: recombinant decorative material is through the fancy veneer of slicing, rotary-cut or sawing.In standard, its physicochemical property only has concrete regulation to moisture content, content of formaldehyde, color fastness to light, other performance as: density, dipping and stripping, abrasion hardness etc. all do not have requirement, and these characteristics are the basic demands as timber floor material.Such as, in timber floor GB, density of wood need be greater than 0.35kg/cm
3, dipping and stripping 70 DEG C of poach 3 hours and 80 DEG C of bakings after 2 hours timber not come unstuck cracking.Current Recombinant Wood does not all reach wood floor board requirement.
The sham wood sold in the market is mostly by being carried out by veneer dyeing, the process such as lamination, assembly and mold pressing makes flitch, again slicing is carried out to flitch and make various product, enhancing process is not carried out to veneer, such as: the patent No. be 00136528.2 patent of invention disclose a kind of preparation method of artificial square pillar timber, comprise the steps: (1), veneer bleached; (2), veneer is dyeed; (3), drying is carried out to veneer; (4), to veneer recombinate, afterwards double spread is carried out to each veneer, then with mould, the veneer group after restructuring is colded pressing or hot pressing; It is characterized in that: compressing flitch is undertaken cuing open system by 1.5 ~ an angle of 90 degrees degree, the veneer cuing open system is carried out restructuring 2 ~ 3 times again.Owing to have employed circulation combination repeatedly, therefore the flitch produced can cut open again and make various veneer, and the possibility of its combination is many, can make the pattern of various design, the flitch produced is lucuriant in design after cuing open system, exactly likes natural wood but without the local defect of natural wood.And for example, to be the application for a patent for invention method for manufacturing that discloses a kind of sham wood a tree, used in making timber for boats of 97112278.4 be application number is carried out by the veneer of general species with H successively
2o
2be bleaching in main solution, dye in the acid dyes solution of uniform temperature, steam or dielectric drying, sorting, assembly, select glue kind gluing, cold pressing or the operation such as hot pressing, slicing.Utilize the method for manufacturing of this sham wood a tree, used in making timber for boats, the slicing presentation quality of the sham wood a tree, used in making timber for boats produced can be made to be tending towards desirable, bleaching veneer can not yellowing, and even dyeing, can not fade, and the equipment of manufacturing takes up an area also little, and production cost reduces greatly.For another example the patent No. be 200510088940.1 patent of invention disclose a kind of sham wood and manufacture method thereof, sham wood comprises cylindrical reel and is pressed into columniform multilayer single plate around reel volume, connected by binding agent between multilayer single plate, and multilayer single plate by deployable be that the continuous veneer of a sheet material is formed, continuous veneer is spliced by the veneer block that at least two are obtained by rotary-cut small dimension wood, and veneer is dyed, fire-retardant, antiseptic veneer.The inventive method comprises step: prepare veneer block by peeler log; Drying is carried out to veneer block; According to color and thickness to veneer block assembly and splicing to form continuous veneer; To continuous veneer gluing; Make continuous veneer under pressure one deck connect one deck volume be pressed into cylindrical timber.
Although foregoing invention utilizes undersized log, save a large amount of common log, expand the sham wood scope of application, the product such as decorative veneer, wood loaded bearing elements can be made into according to demand by the reprocessing such as slicing or rotary-cut, but the density of these sham woods is little, hardness is low, and quality is soft, and intensity is weak, easy cracking, has had a strong impact on widely using of sham wood.
The fast growing wood speed of growth is very fast, causes that material is slightly poor and self rotproofness is weak, and veneer in use often occurs that color spot etc. really falls into, and makes its range of application be subject to a definite limitation.Therefore, modification is carried out to the Recombinant Wood produced with fast growing wood, improve its physical and mechanical property and decorate properties, meaningful.
Along with people are durable to floor, especially the raising of anti-wear performance requirement, utilize treatment technology of the present invention, the density of artificial forest wood, intensity and dimensional stability is not only made to improve, but also the solid wood utilization rate of artificial forest wood is improved greatly, expand its range of application, replaced day by day rare precious broad leaf tree timber for artificial forest wood, promoted that the sustainable development of China's timber resources is of great practical significance.
Summary of the invention
The object of the invention is for above prior art Problems existing, the Recombinant Wood timber floor surface layer providing a kind of preparation method of Recombinant Wood and prepared by the method, the inventive method utilizes ultrasonic wave to vibrate impregnation process artificial fast-growing softwood veneer, the density of wood single-plate is increased, hardness, intensity improve, dimensional stability increase, dipping and stripping rate reduce, not easy to crack, the solid wood utilization rate of artificial fast growing wood is improved greatly, has expanded its range of application.
For realizing object of the present invention, one aspect of the present invention provides a kind of preparation method of high density Recombinant Wood, comprises the step that following order is carried out: wood single-plate is carried out first time hot-pressing processing after impregnation process, obtained sham wood a tree, used in making timber for boats; Sham wood a tree, used in making timber for boats is made sham wood skin; Second time hot-pressing processing is carried out by after sham wood skin assembly.
Wherein, described impregnation process is immersed by wood single-plate in cyanurotriamide modified resin glue solution, carries out ultrasonic wave vibration processing.
Particularly, described wood single-plate is made up of artificial fast-growing softwood.
Especially, the thickness of described wood single-plate is 0.6-2.0mm, is preferably 0.8-1.5mm.
Wherein, described cyanurotriamide modified resin glue solution contains urea, formaldehyde, melamine, polyvinyl alcohol, triethanolamine and timber softening agents, wherein, the weight of urea, formaldehyde, melamine, polyvinyl alcohol, triethanolamine and timber softening agents is 15-25: 55-70: 15-25: 1-6: 1-6: 1-5, be preferably 20-23: 61-65: 16-19: 2-5: 1-5: 1-4, more preferably 20-23: 61-65: 16-19: 2-5: 2-5: 3-4.
Particularly, described timber softening agents contains two stearic acid amine epoxychloropropane salt chloride, bleeding agent, emulsifying agent and water, and the weight of wherein said two stearic acid amine epoxychloropropane salt chlorides, bleeding agent, emulsifying agent and water is 10-25: 2-5: 4-6: 100.
Wherein, described bleeding agent selected area update strategy agent JFC, penetrant t or penetrant m, be preferably penetrating agent JFC; Described emulsifying agent selects paregal O, turkey red oil or emulsifying agent octyl phenol APEO, is preferably paregal O.
Particularly, described penetrating agent JFC selects molecular formula to be C
7-9h
15-19o (CH
2cH
2o)
5h, its hydrophilic-hydrophobic balance value (i.e. HLB value) is the AEO of 11.5-12.5, penetration≤30s; Described penetrant t is aerosol-OT salt.
Particularly, described paregal O selects molecular formula to be C
18h
37(CH
2cH
2o)
15-20oH, the fatty alcohol that its hydrophilic-hydrophobic balance value (i.e. HLB value) is 14-16 and ethylene oxide condensate.
Particularly, described timber softening agents is made in accordance with the following steps: first by two stearic acid amine epoxychloropropane salt chloride and the mixing of first water, 30-50 DEG C is heated to after stirring, then add bleeding agent to stir, be heated to 60-70 DEG C, then add emulsifying agent and remaining water, stir.
Particularly, the consumption of first water described accounts for the 20-30% of water inventory.
Wherein, the preparation process of described cyanurotriamide modified resin glue solution comprises the step that following order is carried out:
A) raw material is prepared according to following weight: the ratio of the weight of urea, formaldehyde, melamine, polyvinyl alcohol, triethanolamine and timber softening agents is 15-25: 55-70: 15-25: 1-6: 1-6: 1-5;
B) formaldehyde and alkaline pH adjusting agent are joined in reactor, polyvinyl alcohol is added after regulating pH to be adjusted to 7.5-8.5, be heated to 85-95 DEG C, add first urea and whole melamines, carry out first stage reaction, the reaction time is 20-30min, obtained first stage reactant liquor, wherein the consumption of first urea accounts for the 30-50% of urea total amount, and reaction temperature is 85-95 DEG C;
C) acidic ph modifier is added, pH is regulated to add second batch urea after 4.5-5.5 to carry out second stage reaction, reaction reaches 7-13mpa.s to the viscosity of reactant liquor, obtained second stage reactant liquor, wherein the consumption of second batch urea accounts for the 10-20% of urea total amount, and reaction temperature is 85-95 DEG C;
D) add the 3rd batch of urea again after adding alkaline pH adjusting agent adjustment pH to 7.5-8.5 and carry out phase III reaction, reaction 20-30min, obtained phase III reactant liquor, wherein the consumption of the 3rd batch of urea accounts for the 10-20% of urea total amount, and reaction temperature is 85-95 DEG C;
E) add remaining urea after being cooled to 65-75 DEG C, isothermal holding 20-30min, then add whole triethanolamines and carry out fourth stage reaction, reaction 15-30min, obtained fourth stage reactant liquor;
F) keep temperature to be 65-75 DEG C, add timber softening agents and alkaline pH adjusting agent, adjustment pH is 7.5-8.5, to obtain final product.
Wherein, steps A) described in the weight of urea, formaldehyde, melamine, polyvinyl alcohol, triethanolamine and timber softening agents be 20-23: 61-65: 16-19: 2-5: 1-5: 1-4, be preferably 20-23: 61-65: 16-19: 2-5: 2-5: 3-4.
Particularly, described formaldehyde to be mass percent concentration be 37% formalin.
Wherein, step B), D), F) described in alkaline pH adjusting agent be ammonia spirit or sodium hydroxide solution, be preferably ammonia spirit; Step C) described in acidic ph modifier be ammonium chloride or hydrochloric acid, be preferably ammonium chloride.
Particularly, the concentration of volume percent of described ammonia spirit is 35 ± 5%.
Wherein, step C) described in reactant liquor viscosity be preferably 10mpa.s.
Particularly, described reactant liquor viscosity is the viscosity of temperature at 23 ± 0.5 DEG C.
Wherein, step F) described in timber softening agents contain two stearic acid amine epoxychloropropane salt chloride, bleeding agent, emulsifying agent and water, the weight of wherein said two stearic acid amine epoxychloropropane salt chlorides, bleeding agent, emulsifying agent and water is 10-25: 2-5: 4-6: 100.
Particularly, described timber softening agents is made in accordance with the following steps: first by two stearic acid amine epoxychloropropane salt chloride and the mixing of first water, 30-50 DEG C is heated to after stirring, then add bleeding agent to stir, be heated to 60-70 DEG C, then add emulsifying agent and remaining water, stir.
Especially, the consumption of first water described accounts for the 20-30% of water inventory.
Particularly, the solids content of described cyanurotriamide modified resin glue solution is 20-65%, is preferably 40-65%; More preferably 50-60%, is further preferably 50-55%; Viscosity 10-20mpa.s, is preferably 10-18mpa.s, more preferably 15-18mpa.s; PH 7.5-8.5.
Wherein, in described ultrasonic wave vibration processing process, hyperacoustic vibration frequency is 2-2.5 × 10
4hertz, the vibration processing time is 8-25min, is preferably 8-15min.
Particularly, described hyperacoustic burst length is 4 ~ 10s: 10s (on/off), be preferably 7 ~ 9s: 10s (on/off), namely ultrasonic wave continues time of origin is (on) 4 ~ 10s, and ultrasonic wave stops time of origin (i.e. intermittent time) (off) to be 10s.
Particularly, in described ultrasonic wave vibration impregnation process process, the temperature of impregnation process is 15-30 DEG C, is preferably 20-30 DEG C.
Wood single-plate is obtained dipping veneer after ultrasonic wave impregnation process, and cyanurotriamide modified resin glue immerses wood single-plate, and the density of wood single-plate is increased, and physical and mechanical property strengthens, and intensity improves.
Particularly, also comprise the veneer after to impregnation process and carry out drying process.
Especially, the temperature of dry process is 60 ± 5 DEG C, and after dry, the moisture content of veneer is 0-25%, is preferably 15-25%, more preferably 18-22%.
Wherein, described first time hot-pressing processing absolute pressure be 8-20kg/cm
2, be preferably 12-20kg/cm
2, more preferably 14-18kg/cm
2; Hot pressing time is 50-90min, is preferably 60-70min; Hot pressing temperature is 50-80 DEG C, is preferably 60-70 DEG C.
Particularly, the hot press described in autoclaving process is hot press with high frequency for the first time, and wherein said hot press with high frequency adopts high-frequency alternating current to heat, and the frequency of heating ac currents is 6-13.58MHz, is preferably 6.72MHz.
Particularly, described first time hot-pressing processing is carried out after also comprising the wood single-plate assembly after by impregnation process.
Especially, the slab thickness after assembly is 60-70cm.
Particularly, the wood single-plate after impregnation process is carried out assembly according to timber rift grain direction.
Particularly, also comprise the slab after first time hot pressing is carried out maintenance process.
Wherein, in described maintenance processing procedure, curing temperature is 30-60 DEG C, is preferably 30-45 DEG C; Relative humidity 40-75%, is preferably 40-45%; Maintenance absolute pressure is 0.6-3MPa, is preferably 1-2MPa; Curing time is 6-8h.
Wherein, the thickness of described sham wood skin is 0.6-3.0mm, is preferably 0.8-3mm, more preferably 1-3mm.
Particularly, described sham wood skin is formed by sham wood a tree, used in making timber for boats described in sawing or slicing.
Wherein, the absolute pressure of described second time hot-pressing processing is 11-17kg/cm
2, be preferably 12-16kg/cm
2; Hot pressing temperature is 100-150 DEG C, is preferably 110-140 DEG C, more preferably 110-130 DEG C; The hot-pressing processing time is 1.0-2.5min/mm, is preferably 1.5-2min/mm.
Particularly, in second time autoclaving process, steam is adopted to heat.
Especially, described second time hot-pressing processing is carried out again after sham wood skin being carried out assembly according to timber rift grain direction.
Particularly, be also included in before carrying out described ultrasonic wave vibration impregnation process, dyeing process is carried out to wood single-plate.
Wherein, described dyeing process moisture content is about 20-35% wood single-plate to be immersed in dyeing liquor and to take out after 3-8h, then carries out drying process, to obtain final product.
Particularly, the soaking temperature in dyeing liquor immersion process is 90-95 DEG C; The dried moisture content of wood single-plate after dyeing is 5-15%, is preferably 8-12%; Baking temperature is 60 ± 5 DEG C.
The present invention provides a kind of preparation method of Recombinant Wood on the other hand, comprises the step that following order is carried out:
1) wood single-plate is immersed in cyanurotriamide modified resin glue solution, carry out ultrasonic wave vibration impregnation process, obtained dipping veneer;
2) dipping veneer assembly is placed in hot press carries out first time hot-pressing processing, obtained sham wood a tree, used in making timber for boats;
3) slicing of sham wood a tree, used in making timber for boats or sawing are become sham wood skin;
4) sham wood skin assembly is placed on the secondary hot pressing process carried out in hot press, obtains final product.
Another aspect of the invention provides a kind of high density Recombinant Wood be prepared from according to the method described above.
High density Recombinant Wood tool prepared by the inventive method has the following advantages:
1, the high density Recombinant Wood of the inventive method utilizes the artificial forest woods such as melamine resin adehsive impregnation process eucalyptus, willow, the physical and mechanical property of timber is strengthened, density increases, intensity improves, dimensional stability increases, the solid wood utilization rate of artificial forest wood is improved greatly, has expanded its range of application.
2, according to the detection of national standard (GB 1927 ~ 1943-2009) " Physico-mechanical Properties of The Wood test method ", the physical and mechanical property of high density Recombinant Wood of the present invention significantly improves, density is large, case hardness is high, dimensionally stable, intensity are high, Deflection Modulus of Elasticity increases, reach more than 9.2GPa, increase rate reaches more than 43%; Bending strength is high, reaches more than 107MPa, and bending strength enhances 50-90%%; Averag density reaches 0.81g/cm
3above, increase in density rate reaches more than 90%, overcomes the scarce filling that existing Recombinant Wood only can be used for common furniture and general ornament materials, reaches preparation timber floor and the requirement for load-carrying members material.
3, the intensity of high density Recombinant Wood of the present invention is high, and hardness is large, and case hardness reaches more than 6H, improves more than 600%, and anti-wear performance is strong, improves the wearability of timber, can exempt from paint.
4, the dipping and stripping rate of high density Recombinant Wood prepared of the inventive method is low, not easy to crack, boil 3 hours in 70 DEG C of water after, then toast the cracking that do not come unstuck under 80 DEG C of conditions, dipping and stripping meets solid wooden compound floor Standard, and common Recombinant Wood does not reach this requirement.
5, the inventive method adopts ultrasonic wave vibration processing in timber immersing glue process, improves the efficiency that impregnated resin permeates in timber, and the density of timber is increased; Also shorten the dipping process time simultaneously, improve the uniformity of timber impregnation, improve treating of wood efficiency.
The good penetrability of the timber pickling glue 6, used in the present invention, improves impregnation of timber efficiency; Hot press with high frequency is adopted to heat timber, carry out the process of low temperature semi-solid preparation, namely melamine modified glue stick semi-solid preparation is at short notice made under cryogenic, adhesive tentatively condenses, its strand does not form fixing chain structure, be in semi-active status, in second time autoclaving process, melamine modified glue stick solidifies completely under the follow-up condition of high temperature again, overcome the defect that in wood-based plate preparation process, glue performance is low, improve the glue performance of adhesive, improve Recombinant Wood physical and mechanical property.
7, the inventive method is simple to operate, and the processing time is short, and Disposal quality is good, fast and also energy consumption little, supplies consumption is few, reduces the production cost of Recombinant Wood, has widened the use suitability for industrialized large-scale promotion application of Recombinant Wood skin.
Detailed description of the invention
In order to understand technical characterstic of the present invention better, below in conjunction with specific embodiment, the present invention is further described.It should be noted that, embodiment is not limiting the scope of the invention.
Artificial forest wood selected by the log scale preparing Recombinant Wood of the present invention, as: Eucalyptus, China fir, poplar, masson pine, paulownia etc., be described in detail for poplar in the embodiment of the present invention.
The embodiment of the present invention adopts two stearic acid amine epoxychloropropane salt chloride purchased from Jiafeng Wood(Suzhou) Co., Ltd.; Penetrating agent JFC is purchased from Guangdong Fu Lian Chemical Co., Ltd.; Paregal O is purchased from Guangdong Fu Lian Chemical Co., Ltd..
Embodiment 1
1, single-plate dyeing process
1) fast growing wood poplar is peeled into the board using poplar board that thickness is 0.8mm, select without hole, without bark pocket, carrot-free rotary-cut board using poplar board, the moisture content of veneer is 25-35% nature, for subsequent use;
2) wood stain, dyeing assistant (glauber salt, bleeding agent, defoamer etc.) and clear water are joined in overflow dyeing machine in proportion, and ON cycle pump by dye liquor modulation evenly; Then heat temperature raising remain 90-95 DEG C; Then be immersed in the dye liquor of overflow dyeing machine by Eucalyptus veneer, carry out dyeing process to veneer, check that color takes out veneer after reaching requirement, cleaning is filtered dry the dye liquor on surface; Wherein, the different colours according to veneer is chosen, and dye liquor concentration is 0.3-0.5%, and dyeing time 3-8h, determines according to veneer thickness, veneer to be dyed U.S.'s cherry color in the embodiment of the present invention;
3) the veneer drying machine be filtered dry is dried to Veneer moisture 8-12% at temperature is 60 ± 5 DEG C, obtains colored single palte, stand-by.
2, timber softening agents is prepared
1) raw material is prepared according to following weight proportion
Wherein, the hydrophilic-hydrophobic balance value of penetrating agent JFC is 12, and the hydrophilic-hydrophobic balance value of paregal O is 15.
2) first, SMQ-05 and first water are joined agitator, first time is heated to 30 DEG C; Then be add penetrating agent JFC under the condition of 30 DEG C in temperature, stir; Then after second time is heated to 60 DEG C, is add paregal O and remaining water under the condition of 60 DEG C, stirs in temperature, obtained timber softening agents is for subsequent use, and wherein, the weight of first water accounts for 20% of water inventory.
3, maceration extract is prepared
1) raw material (× 10kg) is prepared according to following weight:
Wherein, the mass percent concentration of formaldehyde is 37%.
2) first stage is reacted
Formaldehyde is all joined in reactor, with alkaline pH adjusting agent concentrated ammonia solution (mass percent concentration is 35%), pH is adjusted to 8.2, add polyvinyl alcohol, be heated to 90 DEG C after dissolving, add first urea and whole melamines, remaining on temperature is at 90 DEG C, carry out first stage reaction, reaction time is 30min, and obtained first stage reactant liquor, wherein the consumption of first urea accounts for 30% of urea total amount.
3) second stage of reaction
Temperature is kept to be under the condition of 90 DEG C, acidic ph modifier ammonium chloride is added in reactor, pH is regulated to add second time urea after 5.1, carry out second stage reaction, start the viscosity of reactant liquor in detection reaction still according to GB/T14074-2005 " wood adhesive and the resin method of inspection thereof " method after reaction 20min, until reactant liquor viscosity is 13mpa.s (23 ± 0.5 DEG C), obtained second stage reactant liquor, wherein the consumption of second batch urea accounts for 20% of urea total amount, and second stage reaction temperature is 90 DEG C;
4) the 3rd stage of reaction
Temperature is kept to be 90 DEG C, in reactor, add concentrated ammonia solution (mass percent concentration is 35%) regulate pH to 8.0, then add the 3rd batch of urea and carry out phase III reaction, insulation reaction 20min, obtained phase III reactant liquor, wherein the consumption of the 3rd batch of urea accounts for 20% of urea total amount;
5) the 4th stage of reaction
Be cooled to 70 DEG C, add remaining urea, at temperature is 70 DEG C, keeps 30min, then add whole triethanolamines and carry out fourth stage reaction, after reaction 15min, obtained fourth stage reactant liquor;
6) five-stage is reacted
Keep temperature to be 70 DEG C, add timber softening agents and alkaline pH adjusting agent concentrated ammonia solution, regulate pH to be 8.5, obtain timber pickling liquid.
Detect the quality performance indicators of modified cyanurotriamide resin glue prepared by the present embodiment according to GB/T 14074-2006 " wood adhesive and the resin method of inspection thereof ", testing result is as shown in table 1.
4, veneer impregnation process
1) in the ultrasonic vibrator (east and ultrasonic equipment manufactory) maceration extract melamine modified urea-formaldehyde resin glue joined, then colored single palte adopts plastic grid mode separately by colored single palte stacking according between adjacent 2 layers of colored single palte, then colored single palte buttress is immersed in ultrasonic vibrator, maceration extract is made to flood colored single palte buttress, connect ultrasonic transducer, by frequency modulation to 2 × 10 that shake of ultrasonic oscillator
4hz, power-on, ultrasonic wave vibration impregnation process is carried out to colored single palte, the temperature of ultrasonic wave vibration impregnation process is 30 DEG C, time is 10min, hyperacoustic burst length is 4s: 10s, and namely ultrasonic wave continues time of origin is 4s (on), and ultrasonic wave stops time of origin (i.e. intermittent time/off) to be 10s;
2) take out veneer and after being filtered dry the maceration extract on veneer surface, veneer be placed in roller dryer (Suzhou Lin Ji factory), at temperature is 60 ± 5 DEG C, is dried to moisture content reaches 15%, obtained dipping veneer, for subsequent use.
5, wooden a tree, used in making timber for boats is prepared
1) dipping veneer is carried out assembly according to timber rift grain direction, slab highly for 60cm is placed on hot press with high frequency (Can Gao Huaan, Shijiazhuang City, Hebei Province power electronics framework Co., Ltd), switch on power, carry out first time hot pressing, the absolute pressure wherein in first time hot pressing is 14kg/cm
2hot pressing temperature is 70 DEG C, hot pressing time is 60min, the frequency of the heating ac currents of hot press with high frequency is 13.56MHz, under the high-frequency heating function of current, wooden a tree, used in making timber for boats internal water molecule both positive and negative polarity high-speed motion produces heat, heat produces from inside to outside, is convenient to water evaporates in a tree, used in making timber for boats, solves wooden a tree, used in making timber for boats bubbling quality problems;
2) slab after hot pressing is sent into fog room and carries out maintenance process,
Wherein the temperature of maintenance process is 30 DEG C, and the absolute pressure of maintenance process is 2MPa, and relative humidity is 40%, and curing time is 8 hours, obtained sham wood a tree, used in making timber for boats;
6, Recombinant Wood is prepared
1) become thickness to be the sham wood skin of 1mm by the longitudinal slicer slicing of sham wood a tree, used in making timber for boats or with sawing machine sawing, cut into the specification of needs;
2) according to timber rift grain direction, at least 2 layers of sham wood skin are directly carried out assembly, be then placed in flat-bed press and carry out second time hot-pressing processing, wherein, the absolute pressure of second time hot-pressing processing is 12kg/cm
2, hot pressing temperature is 140 DEG C, and the hot-pressing processing time is 1.5min/mm, after pressure release, slab stacking is cooled to room temperature, i.e. obtained Recombinant Wood.
The embodiment of the present invention is described to prepare the scientific and technological plank that thickness is 12mm.
Detect the property indices of Recombinant Wood according to national standard " GB 1927 ~ 1943-2009 Physico-mechanical Properties of The Wood test method ", testing result is in table 2.
Embodiment 2
Except veneer thickness is 1.5mm in single-plate dyeing processing procedure, moisture content is outside 20%, and all the other are identical with embodiment 1;
Preparation timber softening agents process is respectively 25kg, 2kg, 6kg, 100kg except the weight of SMQ-05, penetrating agent JFC, paregal O and water; The weight of first water accounts for 30% of water gross weight, and the temperature of heat temperature raising is 50 DEG C for the first time, and the temperature of second time heat temperature raising is outside 70 DEG C, and all the other are identical with embodiment 1;
Prepare in maceration extract process, except raw material weight is as follows: the weight of urea, formaldehyde, melamine, polyvinyl alcohol, softening agents and triethanolamine is respectively 200kg, 610kg, 190kg, 50kg, 30kg, 20kg; The pH of reaction first stage is 7.5, and reaction temperature is 90 DEG C, and the reaction time is 25min, and the amount of first urea accounts for 50% of urea total amount; Reaction second stage: the pH value adding reactant liquor during second batch urea is 4.5, and reaction temperature is 90 DEG C, and the amount of second batch urea accounts for 10% of urea total amount, and the viscosity of second stage reactant liquor is 10mpa.s; The reaction phase III: reactant liquor pH is 8.5, and reaction temperature is 90 DEG C, and the reaction time is 30min, and the amount of the 3rd batch of urea accounts for 10% of urea total amount; The temperature of reaction fourth stage is 65 DEG C, isothermal holding 30min, and adding the temperature that triethanolamine carries out fourth stage reaction is 65 DEG C, and the reaction time is 25min; React five-stage: temperature is 65 DEG C, pH is outside 7.5, and all the other are identical with embodiment 1;
In veneer impregnation process process, except ultrasonic frequency is 2.5 × 10
4hz, dip time is 10min, and dipping temperature is 30 DEG C, and hyperacoustic burst length is 10s: 10s, and namely ultrasonic wave continues time of origin is 10s (on), and ultrasonic wave stops time of origin (i.e. intermittent time/off) to be 10s; After dry, the moisture content of dipping veneer is outside 25%, and all the other are identical with embodiment 1;
Prepare in wooden a tree, used in making timber for boats process, the thickness except slab is 70cm, and the absolute pressure of first time hot pressing is 18kg/cm
2, hot pressing temperature is 60 DEG C, and hot pressing time is 70min, and hot press heating current frequency is 6.72MHz; The temperature of maintenance process is 45 DEG C, and the absolute pressure of maintenance process is 0.6MPa, and relative humidity is 45%, and curing time is outside 6 hours, and all the other are identical with embodiment 1;
Prepare in Recombinant Wood process, the thickness except sham wood skin is 3mm, and the absolute pressure of second time hot pressing is 16kg/cm
2, hot pressing temperature is 110 DEG C, and the hot-pressing processing time is outside 2.0min/mm, and all the other are identical with embodiment 1.
The quality performance indicators of the maceration extract modified cyanurotriamide resin glue of preparation, testing result is as shown in table 1.
The property indices of the high density Recombinant Wood of preparation, testing result is in table 2.
Embodiment 3
Except veneer thickness is 1mm in single-plate dyeing processing procedure, moisture content is outside 30%, and all the other are identical with embodiment 1;
Preparation timber softening agents process is except being respectively 15kg, 2kg, 4kg, 100kg except the weight of SMQ-05, penetrating agent JFC, paregal O and water; First time, the temperature of heat temperature raising was outside 40 DEG C, and all the other are identical with embodiment 1;
Prepare in maceration extract process, except raw material weight is as follows: the weight of urea, formaldehyde, melamine, polyvinyl alcohol, softening agents and triethanolamine is respectively 250kg, 700kg, 250kg, 50kg, 30kg, 10kg; The pH of reaction first stage is 7.8, and reaction temperature is 85 DEG C, and the reaction time is 20min, and the amount of first urea accounts for 40% of urea total amount; Reaction second stage: when adding second batch urea, pH value is 5.0, and reaction temperature is 85 DEG C, and the viscosity of second stage reactant liquor is 10mmp
2/ s, the amount of second batch urea accounts for 20% of urea total amount; The reactant liquor pH of reaction phase III is adjusted to 7.5, and reaction temperature is 85 DEG C, and the reaction time is 20min, and the amount of the 3rd batch of urea accounts for 20% of urea total amount; Reaction fourth stage: temperature when adding residue urea is 70 DEG C, isothermal holding 20min, adding the temperature that triethanolamine carries out fourth stage reaction is 70 DEG C, and the reaction time is 30min; React five-stage: temperature is 70 DEG C, pH is adjusted to outside 8.0, and all the other are identical with embodiment 1;
In veneer impregnation process process, except ultrasonic frequency is 2.5 × 10
4hz, dip time is 15min, and dipping temperature is 20 DEG C, and hyperacoustic burst length is 7s: 10s, and namely ultrasonic wave continues time of origin is 7s (on), and ultrasonic wave stops time of origin (i.e. intermittent time/off) to be 10s; After dry, the moisture content of dipping veneer is outside 22%, and all the other are identical with embodiment 1;
Prepare in wooden a tree, used in making timber for boats process, the absolute pressure except first time hot pressing is 16kg/cm
2, hot pressing temperature is 60 DEG C, and hot pressing time is 65min, and hot press heating current frequency is 6.72MHz; The temperature of maintenance process is 45 DEG C, and the absolute pressure of maintenance process is 1.0MPa, and relative humidity is 45%, and curing time is outside 7 hours, and all the other are identical with embodiment 1;
Prepare in Recombinant Wood process, the thickness except sham wood skin is 2mm, and the absolute pressure of second time hot pressing is 15kg/cm
2, hot pressing temperature is 120 DEG C, and the hot-pressing processing time is outside 2.0min/mm, and all the other are identical with embodiment 1.
The quality performance indicators of the maceration extract modified cyanurotriamide resin glue of preparation, testing result is as shown in table 1.
The property indices of the high density Recombinant Wood of preparation, testing result is in table 2.
Embodiment 4
Except veneer thickness is 0.8mm in single-plate dyeing processing procedure, moisture content is outside 27%, and all the other are identical with embodiment 1;
Preparation timber softening agents process is respectively 20kg, 4kg, 5kg, 100kg except the weight of SMQ-05, penetrating agent JFC, paregal O and water; The weight of first water accounts for 30% of water gross weight, and the temperature of heat temperature raising is 40 DEG C for the first time, and the temperature of second time heat temperature raising is outside 70 DEG C, and all the other are identical with embodiment 1;
Prepare in maceration extract process, except raw material weight is as follows: the weight of urea, formaldehyde, melamine, polyvinyl alcohol, softening agents and triethanolamine is respectively 230kg, 650kg, 160kg, 30kg, 40kg, 40kg; The pH of reaction first stage is adjusted to 8.5, and reaction temperature is 95 DEG C, and the reaction time is 30min, and the amount of first urea accounts for 50% of urea total amount; Reaction second stage: the pH value adding reactant liquor during second batch urea is adjusted to 5.5, and reaction temperature is 95 DEG C, and the amount of second batch urea accounts for 15% of urea total amount, and the viscosity of second stage reactant liquor is 7mpa.s; The reactant liquor pH of reaction phase III is adjusted to 7.5, and reaction temperature is 95 DEG C, and the reaction time is 30min, and the amount of the 3rd batch of urea accounts for 10% of urea total amount; Reaction fourth stage: temperature when adding residue urea is 75 DEG C, isothermal holding 30min, adding the temperature that triethanolamine carries out fourth stage reaction is 75 DEG C, and the reaction time is 20min; The reacting liquid temperature reacting five-stage is 75 DEG C, and pH is outside 8.0, and all the other are identical with embodiment 1;
In veneer impregnation process process, except ultrasonic wave dip time is 8min, dipping temperature is 25 DEG C, and hyperacoustic burst length is 9s: 10s, namely ultrasonic wave continues time of origin is 9s (on), and ultrasonic wave stops time of origin (i.e. intermittent time/off) to be 10s; After dry, the moisture content of dipping veneer is outside 18%, and all the other are identical with embodiment 1;
Prepare in wooden a tree, used in making timber for boats process, the thickness except slab is 70cm, and the absolute pressure of first time hot pressing is 15kg/cm
2, hot pressing temperature is 70 DEG C, and hot pressing time is 70min, and hot press heating current frequency is 6.72MHz; The temperature of maintenance process is 45 DEG C, the absolute pressure 3MPa of maintenance process, relative humidity 45%, and curing time is outside 7 hours, and all the other are identical with embodiment 1;
Prepare in Recombinant Wood process, the thickness except sham wood skin is 1mm, and the absolute pressure of second time hot pressing is 14kg/cm
2, hot pressing temperature is 130 DEG C, and the hot-pressing processing time is outside 1.5min/mm, and all the other are identical with embodiment 1.
The quality performance indicators of the maceration extract modified cyanurotriamide resin glue of preparation, testing result is as shown in table 1.
The property indices of the high density Recombinant Wood of preparation, testing result is in table 2.
Reference examples
Adopt identical with embodiment 1-4 and without any process poplar wood routine in contrast.
The quality performance indicators testing result of table 1 modified cyanurotriamide resin glue
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | |
| Solids content (%) | 50.50 | 51.80 | 52.40 | 53.30 |
| Viscosity (mp as) | 15.20 | 16.30 | 16.85 | 17.36 |
| PH value | 8.5 | 7.5 | 8.0 | 8.0 |
The performance test results of table 2 Recombinant Wood timber
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Reference examples | |
| Averag density (g/cm 3) | 0.81 | 0.93 | 0.88 | 0.85 | 0.42 |
| Density Magnification (%) | 93 | 121 | 109.5 | 102 | / |
| Deflection Modulus of Elasticity (GPa) | 9.2 | 9.8 | 9.5 | 9.6 | 6.4 |
| Deflection Modulus of Elasticity increase rate (%) | 43.75 | 53.12 | 48.43 | 50 | / |
| Bending strength (MPa) | 107.5 | 110.3 | 113.3 | 110.8 | 60 |
| Bending strength increase rate (%) | 78.3 | 50.3 | 88.83 | 84.67 | / |
| Dipping and stripping rate | 0 | 0 | 0 | 0 | 0 |
| Case hardness (H) | 6 | 8 | 8 | 7 | 1 |
| Case hardness Magnification | 600 | 800 | 800 | 700 | / |
| Wearability | Excellent | Excellent | Excellent | Excellent | Qualified |
Testing result shows:
1, by the detection of standard GB/T 1927 ~ 1943-2009 " Physico-mechanical Properties of The Wood test method ", the physical and mechanical property of Recombinant Wood prepared by the inventive method significantly improves, the mechanical property of the Recombinant Wood utilizing Eucalyptus Wood to prepare is good, intensity is high, Deflection Modulus of Elasticity improves, and reaches more than 9.2GPa; Deflection Modulus of Elasticity improves more than 40%; Bending strength is high, reaches more than 100MPa, and bending strength enhances 50-90%.
2, the averag density of high density Recombinant Wood that prepared by the inventive method increases, and averag density reaches more than 0.81, and density improves 90-121%.
3, the dimensionally stable of high density Recombinant Wood prepared of the inventive method, not easily strain cracking, after Recombinant Wood of the present invention boils 3 hours in 70 DEG C of water, toast under 80 DEG C of conditions again, high density Recombinant Wood of the present invention does not come unstuck, and does not ftracture, and dipping and stripping rate is 0%.
4, the high density Recombinant Wood surface property prepared of the inventive method is good, and case hardness increases, and case hardness reaches more than 6H, and case hardness improves 600%.
6, the high density Recombinant Wood that prepared by the inventive method reaches People's Republic of China (PRC) forestry industry standard recombinant decorative veneer LY/T1654-2006 national standard.
Claims (8)
1. the preparation method of a Recombinant Wood, comprise the step that following order is carried out: wood single-plate is carried out first time hot-pressing processing after impregnation process, obtained sham wood a tree, used in making timber for boats, wherein, described impregnation process is immersed by wood single-plate in cyanurotriamide modified resin glue solution, carry out ultrasonic wave vibration processing, described cyanurotriamide modified resin glue solution contains urea, formaldehyde, melamine, polyvinyl alcohol, triethanolamine and timber softening agents, wherein, urea, formaldehyde, melamine, polyvinyl alcohol, the weight of triethanolamine and timber softening agents is 15-25:55-70:15-25:1-6:1-6:1-5, sham wood a tree, used in making timber for boats is made sham wood skin, second time hot-pressing processing is carried out by after sham wood skin assembly.
2. preparation method as claimed in claim 1, it is characterized in that described timber softening agents contains two stearic acid amine epoxychloropropane salt chloride, bleeding agent, emulsifying agent and water, the weight of wherein said two stearic acid amine epoxychloropropane salt chlorides, bleeding agent, emulsifying agent and water is 10-25:2-5:4-6:100.
3. preparation method as claimed in claim 1, is characterized in that described hyperacoustic vibration frequency is 2-2.5 × 10
4hertz, the vibration processing time is 8-25min.
4. preparation method as claimed in claim 1 or 2, is characterized in that the absolute pressure of described first time hot-pressing processing is 8-20kg/cm
2, hot pressing time is 50-90min.
5. preparation method as claimed in claim 1 or 2, is characterized in that the thickness of described sham wood skin is 0.6-3.0mm.
6. preparation method as claimed in claim 1 or 2, is characterized in that the absolute pressure of described second time hot-pressing processing is 11-17kg/cm
2, hot pressing temperature is 100-150 DEG C.
7. preparation method as claimed in claim 1 or 2, is characterized in that the processing time of described second time hot-pressing processing is 1.0-2.5min/mm.
8. a Recombinant Wood, is characterized in that being prepared from according to method as described in as arbitrary in claim 1-7.
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| CN103692536B (en) * | 2013-12-12 | 2015-04-08 | 陕西师范大学 | Method for clearing formaldehyde in artificial board |
| CN103991119A (en) * | 2014-06-05 | 2014-08-20 | 王永刚 | Multi-layer wood floor manufacturing technique |
| CN104493943B (en) * | 2014-12-28 | 2016-08-17 | 浙江升华云峰新材股份有限公司 | A kind of production technology of science and technology veneer |
| CN105538466B (en) * | 2015-12-15 | 2018-01-02 | 温玉桂 | The processing method of wooden mobile phone shell |
| CN105599093B (en) * | 2015-12-15 | 2018-01-02 | 东莞市林泽通讯器材有限公司 | Mobile phone shell manufacturing process |
| CN108115795B (en) * | 2015-12-15 | 2020-09-04 | 南京航塔旅游用品股份有限公司 | Mobile phone shell processing method |
| CN105563594B (en) * | 2015-12-15 | 2018-05-11 | 浙江泰星儿童玩具有限公司 | Linden shell manufacturing process |
| CA3016477A1 (en) * | 2016-03-04 | 2017-09-08 | Juergen Graf | Frame for spectacles, a monocle or a lorgnon |
| CN107457857A (en) * | 2017-09-11 | 2017-12-12 | 阜南县大自然工艺品有限公司 | A kind of method of thin plate Wood craft anticracking |
| CN108748500A (en) * | 2018-05-09 | 2018-11-06 | 阜南县勤艺工艺品有限公司 | A kind of processing method of enhancing windmill palm vine material braiding mechanical property |
| CN108582304B (en) * | 2018-07-04 | 2024-02-27 | 苏州凯牌木业有限公司 | Anti-cracking floor and preparation method thereof |
| CN112123489A (en) * | 2020-09-17 | 2020-12-25 | 千年舟新材科技集团有限公司 | Technical wood material immersion liquid, preparation and treatment method and manufacturing process |
| CN112720746A (en) * | 2020-12-11 | 2021-04-30 | 宣城宏宇竹业有限公司 | Sufficient gumming device of bamboo chip for biomass traffic guardrail |
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| FI114997B (en) * | 2000-03-16 | 2005-02-15 | Ilvolankoski Oy | A solid wood flooring element and a method and apparatus for making a flooring element |
| JP2004058416A (en) * | 2002-07-26 | 2004-02-26 | Yamaha Corp | Manufacturing method for woody material for musical instrument, woody material for musical instrument obtained by the method, and musical instrument using the same |
| CN100348393C (en) * | 2005-01-11 | 2007-11-14 | 王天龙 | Technology for producing hot-pressed products of multilayer wood veneer and multilayer wood splint |
| CN100379537C (en) * | 2005-03-11 | 2008-04-09 | 丁冠真 | Method for making wood floor by pure poplar |
| CN101161430A (en) * | 2006-10-13 | 2008-04-16 | 马新闻 | Wood composite flooring needle, hardwood tree rift sawing plaga surfacing material decorative sheet and production method |
| CN102049801A (en) * | 2009-11-11 | 2011-05-11 | 吴根水 | Resin impregnated wood skin veneer and manufacturing process thereof |
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