CN105235024B - The production method of low formaldehyde solid wooden compound floor - Google Patents
The production method of low formaldehyde solid wooden compound floor Download PDFInfo
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- CN105235024B CN105235024B CN201510552131.5A CN201510552131A CN105235024B CN 105235024 B CN105235024 B CN 105235024B CN 201510552131 A CN201510552131 A CN 201510552131A CN 105235024 B CN105235024 B CN 105235024B
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 347
- 239000007787 solid Substances 0.000 title claims abstract description 56
- 150000001875 compounds Chemical class 0.000 title claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 38
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- 238000006243 chemical reaction Methods 0.000 claims description 37
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- 239000000843 powder Substances 0.000 claims description 9
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- 229940031574 hydroxymethyl cellulose Drugs 0.000 claims description 6
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 6
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 6
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- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 4
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 4
- ODGAOXROABLFNM-UHFFFAOYSA-N polynoxylin Chemical compound O=C.NC(N)=O ODGAOXROABLFNM-UHFFFAOYSA-N 0.000 claims description 4
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 3
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- 150000001412 amines Chemical class 0.000 claims 1
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- 239000001301 oxygen Substances 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
- 239000000853 adhesive Substances 0.000 abstract description 18
- 230000001070 adhesive effect Effects 0.000 abstract description 18
- 230000006378 damage Effects 0.000 abstract description 7
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 abstract description 4
- 230000003670 easy-to-clean Effects 0.000 abstract description 3
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 8
- 229920002472 Starch Polymers 0.000 description 6
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Landscapes
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Floor Finish (AREA)
Abstract
The present invention relates to a kind of solid wooden compound floor, and in particular to a kind of production method of low formaldehyde solid wooden compound floor.Its processing step produced includes：Plank blade-drying-repairing-selection-gluing-precompressed-hot pressing-cutting edge sanding-finished product.The key of production method of the present invention is that the residual volume of formaldehyde in adhesive is reduced by the urea-formaldehyde resin adhesive used in improvement, so as to reduce the residual volume of formaldehyde in solid wooden compound floor；By using the technological parameter in the measured sheet material of matter and control production process, it is ensured that the quality of the solid wooden compound floor of production.The solid wooden compound floor content of formaldehyde that the present invention is prepared is low, the steady quality of plate, it is not easy to damage；It is easy to install with comfortable foot feeling, wear-resisting, the characteristics of easy to clean and strong stability.
Description
Technical field
The present invention relates to a kind of solid wooden compound floor, and in particular to a kind of production method of low formaldehyde solid wooden compound floor.
Background technology
With the development of China's economic, the raising of living standards of the people, the requirement to house decoration is also constantly improved.Wood
Floor becomes the preferred material of family's ground surface finishing because of its naturally graceful lines, good texture.And solid wooden compound floor
The shortcoming of solid wooden floor board moisture expansion and drying shrinkage is overcome, with preferable dimensional stability, while remaining the natural wood of solid wooden floor board
Line and comfortable feel, so that as the important kind in floor.Solid wooden compound floor is the sheet material crosswise lamination by different tree species
Form, overcome the shortcoming of the unidirectional same sex of solid wooden floor board, drying shrinkage bulking factor is small, with preferable dimensional stability, and remains
The natural wood veins of solid wooden floor board and comfortable feel, solid wooden compound floor have the stability of consolidated floor and U.S. of solid wooden floor board concurrently
The property seen, and there is environment-friendly advantage, and the advantage of the existing common solid wooden floor board of solid wooden compound floor, and effectively have adjusted wood
Internal stress between material, improves timber and changes and the shortcoming of deflection greatly with season humidity, therefore, liked by consumer
Love.
But in the prior art, during solid wooden compound floor is manufactured, due to having used some adhesives etc. to change
Learn reagent so that solid wooden compound floor contains a large amount of formaldehyde.- 92 DEG C of formaldehyde fusing point, -19.5 DEG C of boiling point, density during liquid is
0.815 gram per centimeter3(20 DEG C), soluble in water and ethanol.There is aldehyde radical in formaldehyde molecule, be a kind of important Organic Ingredients, be nothing
Color, the irritative gas with overpowering odor.Due to using in various artificial boards (particieboard, fiberboard, glued board etc.)
Adhesive, thus formaldehyde can be contained.The making of new-type furniture, metope, the decoration laying on ground, will use adhesive.It is every
A large amount of places using adhesive, always have Form aldehyde release.In addition, some chemical fibre carpets, paint are also containing a certain amount of
Formaldehyde.Formaldehyde belongs to the sufficient large chemical products of widely used, simple production process, raw material supply, in being Downstream Products of Methanol
Trunk, world's annual production is at 25,000,000 tons or so, and 30% or so methanol is all used for producing formaldehyde.The main original of formaldehyde abuse
Because being its cheap price.Formaldehyde yield is into the trend of cumulative year after year, and this is one with textile industry and the development of building materials industry
Cause, the favorite of this explanation formaldehyde or chemical industry within a very long time from now on.A small amount of formaldehyde is often sucked, can be drawn
Slow poisoning is played, mucous hyperemia, skin irritatin disease, allergic dermatitis, nail angling and fragility, nail matrix finger tip pain etc. occurs.
Constitutional symptom has headache, weak, stomach is received poor, palpitaition, insomnia, weight loss and vegetative nervous disorder etc..Formaldehyde is endangered to health
Evil mainly has the following aspects：Stimulation, the main harm of formaldehyde is shown as to mucocutaneous stimulation, and formaldehyde is
Magma noxious material, can be combined with protein, high concentration suction when there is the stimulation and oedema, Eye irritation, headache of respiratory tract seriously；
Sensitization, direct skin contact formaldehyde can cause allergic dermatitis, color spot, necrosis, and branch can be induced during suction high-concentration formaldehyde
San bronchial asthma.Mutagenesis, high-concentration formaldehyde or a kind of genotoxicity material.Experimental animal sucks in laboratory high concentration
In the case of, rhinopharyngeal neoplasm can be caused.Interior is the topmost activity space of the mankind, the live and work of people daily indoors
Time, room air had vital influence to the health of the mankind at least at 12 more than hour.By technology and material institute
Limit, at present manufacture indoor furniture and fitment process in can not also total ban use the raw material containing formaldehyde components, it is impossible to
The harm of formaldehyde is removed from source, therefore, efficiently material is removed with environment-friendly indoor formaldehyde and has before good application
Scape.Used due to formaldehyde can not be limited comprehensively, it is the task of top priority to eliminate and reduce formaldehyde harm.
The content of the invention
It is an object of the invention to provide a kind of production method of low aldehyde solid wooden compound floor, obtained by the production of the present invention
Solid wooden compound floor content of formaldehyde it is low, and the steady quality of plate, it is not easy to damage.The key of production method of the present invention is logical
The residual volume of formaldehyde in the urea-formaldehyde resin adhesive reduction adhesive used in improving is crossed, so as to reduce formaldehyde in solid wooden compound floor
Residual volume；By using the technological parameter in the measured sheet material of matter and control production process, it is ensured that the solid wood of production
The quality of composite floor board.
To realize the purpose of the present invention, the present invention is adopted the following technical scheme that：
A kind of production method of low formaldehyde solid wooden compound floor, it is characterised in that step is as follows：
（1）Plank blade：Rotary-cut is carried out to sheet material with peeler, veneer is obtained, and choose carrying small holes caused by worms, rotten, defect
Excessive unqualified sheet material；
（2）Dry：With drying machine to veneer is dried, the moisture content of plank is set to drop to less than 12%；
（3）Repairing：Include the defect or flaw of dry, crackle, knaur, bark pocket and knot to what is occurred on veneer
Repaired；
（4）Selection：In obtained veneer, the dash board used in glued board is using toothed oak wood, Manchurian ash, green handle mulberry, Shan pahudia wood, spinach
The veneer of trailing plants lattice or teak sheet material；Intermediate plate and bottom plate use the veneer of San Cheong sheet material, eucalyptus plate or birch lumber；
（5）Gluing：Gluing and assembly are carried out to dash board, intermediate plate and bottom plate with glue spreader, glue is low formaldehyde emission uf resin
Glue, single spreading amount is 220~235g/m2；
（6）Precompressed：By the good slab of assembly under 0.9~1.3MPa of unit pressure, 50~75min of precompressed；
（7）Hot pressing：Hot-forming, 0.7~1.1MPa of hot pressing pressure is carried out using hot press, temperature is 130~140 DEG C,
Time：20-25 minutes；It is then sent to quenched in balance storehouse；
（8）Cutting edge sanding：Above-mentioned slab is subjected to cutting edge, substrate layer is made, by low formaldehyde emission uf resin glue in then sanding
It is coated on two outer surfaces of above-mentioned basic unit's material, then pastes last layer poplar bark respectively as decoration on two outer surfaces
Layer, is then cold-pressed to the sheet material of laminating under 0.9~1.3MPa of unit pressure, is cold-pressed 55~70min of the time；Then again
Hot pressing, 0.7~1.1MPa of hot pressing pressure are carried out, temperature is 130~140 DEG C, time：20-25 minutes；
(9) finished product：Place to be cooled to after room temperature after hot pressing and spray one layer of ammonium acetate on the surface of plate, allow it to spontaneously dry, obtain
To low formaldehyde solid wooden compound floor.
The preparation method of above-mentioned low formaldehyde emission uf resin glue is：Formalin is added in a kettle., is adjusted with Na0H solution
It is 7.6~8.2 to save pH value, adds the hydroxymethyl cellulose of formalin weight 0.4%~0.6%, adds formalin weight
12%~15% urea, is added in 43~47min, and temperature risen into 53~56 DEG C from normal temperature, and insulation reaction 44~
50min；Afterwards, reaction solution adds formic acid solution, and regulation reaction solution pH is 4.2~5.2, and addition formalin weight 24%~
Added in 28% 43~47min of urea, add formalin weight 4%-7% oxidized tapioca, temperature reaction liquid
To 78~83 DEG C, 87~93min of insulation reaction；Finally, pH to 8.0~8.5 is adjusted with Na0H solution, reaction temperature is down to 60
~70 DEG C, add and added in the urea of formalin weight 38%~43%, 40~45min, add formalin weight
0.6% melamine, reacts 80~90min, is cooled to room temperature, can be with the method for filtering by unnecessary urine fully after reaction
Element is filtered out, and adds the ammonium chloride or ammonium sulfate of Lauxite weight 0.3%~0.8% as curing agent progress impregnation, then
14%~18% bean powder or swelled ground for adding formalin weight are used as filler, you can obtain low formaldehyde emission uf resin gluing
Agent.
In the preparation method of above-mentioned low formaldehyde emission uf resin glue, the preparation method of oxidized tapioca used is：By wood
Sweet potato starch and water are according to tapioca:The weight ratio of water is 1:4-6 ratio is placed in reactor, is stirred, agitating and heating
Temperature is reached 50-55 DEG C, then add the H of tapioca weight 1.4%-1.7%, 3mol/L2S04 And mass fraction is
5%th, tapioca weight 0.015-0.02% KMn04Solution, stirring, and keep 50-55 DEG C of one hour of thermotonus with
Upper until the color of solution is changed into milky, stopping is reacted, and obtains oxidized starch emulsion, by the filter of obtained oxidized starch emulsion
Film is washed, centrifugation, obtains Off-white solid, and Off-white solid is dried into 2-3 h in 40-50 DEG C, volatilized completely to moisture, is made
Obtain oxidized tapioca.
The good effect that the present invention is produced is：
1. the adhesive used in the low formaldehyde solid wooden compound floor of present invention production is low formaldehyde emission uf resin adhesive, it is made
Preparation Method is using formaldehyde is once added, the method for three addition urea, polymerization rate remains steady, it is to avoid polymerization
The generation of reaction gel effect, formaldehyde monomers are nearly or completely reacted, and gained Lauxite residual formaldehyde is low, and in synthesis
Hydroxymethyl cellulose is added at the beginning of Lauxite can improve the tack of Lauxite, and adding a small amount of melamine can be effective
Improve the water resistance and adhesion strength of Lauxite in ground；Urea can be promoted by adding curing agent in glue modulation stirring mixed process
The crosslinking curing of urea formaldehyde adhesive, promotes reaction to carry out, the characteristics of obtained adhesive has water-tolerant, adhesion strength is big.
2nd, the present invention adds oxidized tapioca when preparing low formaldehyde emission uf resin adhesive, uses KMn04Solution oxide
Tapioca afterwards is, containing the converted starch based on aldehyde radical or carboxyl molecular structure, to utilize the carboxyl and urea formed after oxidation
Methylol in urea formaldehyde reacts, to improve the glue-joint strength of Lauxite；Carboxyl in simultaneous oxidation starch can be with
Reacted with the complete formaldehyde of unreacted in Lauxite, reduce the content of free formaldehyde in urea-formaldehyde resin, can also be indirect
Reduction solid wooden compound floor burst size of methanal.Bean powder or swelled ground are added as filler, adhesive master can be not only diluted
The component of composition is wanted, production cost is reduced, moreover it is possible to shrinkage factor during Lauxite solidification is reduced, it is to avoid Lauxite is produced when solidifying
Raw crackle；Bean powder can also be acted on the free formaldehyde in resin, intermolecular generation cross-linking reaction, and generation can not reversion products（Albumen
Matter gel）, the working life of glue can also be extended.
3rd, the present invention has sprayed one layer of ammonium acetate solution, ammonium acetate solution is sprayed onto in last process to plank
The surface of solid wooden compound floor, can react with the free formaldehyde in glued board, nonpoisonous and tasteless novel substance be generated, so as to enter one again
Step eliminates the free formaldehyde in sheet material, reduces the content of formaldehyde.
4th, the present invention be used to preparing solid wooden compound floor wood quality is good, easy processing, strictly controlled in production process
The technological parameter of the processes such as precompressed, hot pressing, so as to ensure that the quality of the solid wooden compound floor of production；The steady quality of plate, no
It is easily damaged；It is easy to install with comfortable foot feeling, wear-resisting, the characteristics of easy to clean and strong stability, using low residual formaldehyde amount
Adhesive, the solid wooden compound floor content of formaldehyde prepared is low.
Embodiment
Embodiment l
A kind of production method of low formaldehyde solid wooden compound floor, step is as follows：
（1）Plank blade：Rotary-cut is carried out to sheet material with peeler, veneer is obtained, and choose carrying small holes caused by worms, rotten, defect
Excessive unqualified sheet material；
（2）Dry：With drying machine to veneer is dried, the moisture content of plank is set to drop to less than 12%；
（3）Repairing：Include the defect or flaw of dry, crackle, knaur, bark pocket and knot to what is occurred on veneer
Repaired；
（4）Selection：In obtained veneer, the dash board used in glued board uses the veneer of toothed oak wood plank；Intermediate plate and bottom plate
Using the veneer of San Cheong sheet material；
（5）Gluing：Gluing and assembly are carried out to dash board, intermediate plate and bottom plate with glue spreader, glue is low formaldehyde emission uf resin
Glue, single spreading amount is 220~235g/m2；
（6）Precompressed：By the good slab of assembly under 0.9~1.3MPa of unit pressure, 50~75min of precompressed；
（7）Hot pressing：Hot-forming, 0.7~1.1MPa of hot pressing pressure is carried out using hot press, temperature is 130~140 DEG C,
Time：20-25 minutes；It is then sent to quenched in balance storehouse；
（8）Cutting edge sanding：Above-mentioned slab is subjected to cutting edge, substrate layer is made, by low formaldehyde emission uf resin glue in then sanding
It is coated on two outer surfaces of above-mentioned basic unit's material, then pastes last layer poplar bark respectively as decoration on two outer surfaces
Layer, is then cold-pressed to the sheet material of laminating under 0.9~1.3MPa of unit pressure, is cold-pressed 55~70min of the time；Then again
Hot pressing, 0.7~1.1MPa of hot pressing pressure are carried out, temperature is 130~140 DEG C, time：20-25 minutes；
(9) finished product：Place to be cooled to after room temperature after hot pressing and spray one layer of ammonium acetate on the surface of plate, allow it to spontaneously dry, obtain
To low formaldehyde solid wooden compound floor.
The preparation method of above-mentioned low formaldehyde emission uf resin glue is：Formalin is added in a kettle., is adjusted with Na0H solution
It is 7.6~8.2 to save pH value, adds the hydroxymethyl cellulose of formalin weight 0.4%, adds the urine of formalin weight 12%
Element, is added in 43~47min, and temperature is risen into 53~56 DEG C, insulation reaction 44min from normal temperature；Afterwards, reaction solution adds first
Acid solution, regulation reaction solution pH is 4.2~5.2, is added in the 43~47min of urea for adding formalin weight 28%, then add
Enter the oxidized tapioca of formalin weight 4%, temperature reaction liquid to 78~83 DEG C, insulation reaction 87min；Finally, use
Na0H solution adjusts pH to 8.0~8.5, and reaction temperature is down to 60~65 DEG C, adds the urea of formalin weight 38%, 40~
Added in 45min, add the melamine of formalin weight 0.6%, reacted 80min, be cooled to room temperature, fully after reaction
Unnecessary urea can be filtered out with the method for filtering, the ammonium chloride for adding Lauxite weight 0.3% enters as curing agent
Row impregnation, adds 14% bean powder or swelled ground of formalin weight as filler, you can obtain low formaldehyde emission uf resin glue
Glutinous agent.
In the preparation method of above-mentioned low formaldehyde emission uf resin glue, the preparation method of oxidized tapioca used is：By wood
Sweet potato starch and water are according to tapioca:The weight ratio of water is 1:4 ratio is placed in reactor, is stirred, and agitating and heating makes
Temperature reaches 50-55 DEG C, then adds tapioca weight 1.4%, 3mol/L H2S04 And mass fraction is 5%, cassava
The KMn0 of starch weight 0.0154Solution, stirring, and 50-55 DEG C of thermotonus one is kept more than hour until the face of solution
Discoloration is milky, stops reaction, obtains oxidized starch emulsion, obtained oxidized starch emulsion is washed with filter membrane, centrifuges, obtains
To Off-white solid, Off-white solid is dried into 2h at 50 DEG C, volatilized completely to moisture, oxidized tapioca is made.
Embodiment 2
A kind of production method of low formaldehyde solid wooden compound floor, step is as follows：
（1）Plank blade：Rotary-cut is carried out to sheet material with peeler, veneer is obtained, and choose carrying small holes caused by worms, rotten, defect
Excessive unqualified sheet material；
（2）Dry：With drying machine to veneer is dried, the moisture content of plank is set to drop to less than 12%；
（3）Repairing：Include the defect or flaw of dry, crackle, knaur, bark pocket and knot to what is occurred on veneer
Repaired；
（4）Selection：In obtained veneer, the dash board used in glued board uses the veneer of Manchurian ash sheet material；Intermediate plate and bottom
Plate uses the veneer of eucalyptus plate；
（5）Gluing：Gluing and assembly are carried out to dash board, intermediate plate and bottom plate with glue spreader, glue is low formaldehyde emission uf resin
Glue, single spreading amount is 220~235g/m2；
（6）Precompressed：By the good slab of assembly under 0.9~1.3MPa of unit pressure, 50~75min of precompressed；
（7）Hot pressing：Hot-forming, 0.7~1.1MPa of hot pressing pressure is carried out using hot press, temperature is 130~140 DEG C,
Time：20-25 minutes；It is then sent to quenched in balance storehouse；
（8）Cutting edge sanding：Above-mentioned slab is subjected to cutting edge, substrate layer is made, by low formaldehyde emission uf resin glue in then sanding
It is coated on two outer surfaces of above-mentioned basic unit's material, then pastes last layer poplar bark respectively as decoration on two outer surfaces
Layer, is then cold-pressed to the sheet material of laminating under 0.9~1.3MPa of unit pressure, is cold-pressed 55~70min of the time；Then again
Hot pressing, 0.7~1.1MPa of hot pressing pressure are carried out, temperature is 130~140 DEG C, time：20-25 minutes；
(9) finished product：Place to be cooled to after room temperature after hot pressing and spray one layer of ammonium acetate on the surface of plate, allow it to spontaneously dry, obtain
To low formaldehyde solid wooden compound floor.
The preparation method of above-mentioned low formaldehyde emission uf resin glue is：Formalin is added in a kettle., is adjusted with Na0H solution
It is 7.6~8.2 to save pH value, adds the hydroxymethyl cellulose of formalin weight 0.5%, adds the urine of formalin weight 13%
Element, is added in 43~47min, and temperature is risen into 53~56 DEG C, insulation reaction 47min from normal temperature；Afterwards, reaction solution adds first
Acid solution, regulation reaction solution pH is 4.2~5.2, is added in the 43~47min of urea for adding formalin weight 26%, then add
Enter the oxidized tapioca of formalin weight 5%, temperature reaction liquid to 78~83 DEG C, insulation reaction 90min；Finally, use
Na0H solution adjusts pH to 8.0~8.5, and reaction temperature is down to 60~70 DEG C, adds the urea of formalin weight 40%, 40~
Added in 45min, add the melamine of formalin weight 0.6%, reacted 85min, be cooled to room temperature, fully after reaction
Unnecessary urea can be filtered out with the method for filtering, the ammonium sulfate for adding Lauxite weight 0.5% enters as curing agent
Row impregnation, adds 16% bean powder or swelled ground of formalin weight as filler, you can obtain low formaldehyde emission uf resin glue
Glutinous agent.
In the preparation method of above-mentioned low formaldehyde emission uf resin glue, the preparation method of oxidized tapioca used is：By wood
Sweet potato starch and water are according to tapioca:The weight ratio of water is 1:5 ratio is placed in reactor, is stirred, and agitating and heating makes
Temperature reaches 50-55 DEG C, then adds tapioca weight 1.5%, 3mol/L H2S04 And mass fraction is 5%, cassava
The KMn0 of starch weight 0.017%4Solution, stirring, and 50-55 DEG C of thermotonus one is kept more than hour until solution
Color is changed into milky, stops reaction, obtains oxidized starch emulsion, obtained oxidized starch emulsion is washed with filter membrane, centrifuges,
Off-white solid is obtained, Off-white solid is dried into 2.5h in 45 DEG C of drying boxes, volatilized completely to moisture, oxidized tapioca is made
Starch.
Embodiment 3
A kind of production method of low formaldehyde solid wooden compound floor, step is as follows：
（1）Plank blade：Rotary-cut is carried out to sheet material with peeler, veneer is obtained, and choose carrying small holes caused by worms, rotten, defect
Excessive unqualified sheet material；
（2）Dry：With drying machine to veneer is dried, the moisture content of plank is set to drop to less than 12%；
（3）Repairing：Include the defect or flaw of dry, crackle, knaur, bark pocket and knot to what is occurred on veneer
Repaired；
（4）Selection：In obtained veneer, the dash board used in glued board is using toothed oak wood, Manchurian ash, green handle mulberry, Shan pahudia wood, spinach
The veneer of trailing plants lattice or teak sheet material；Intermediate plate and bottom plate use the veneer of birch lumber；
（5）Gluing：Gluing and assembly are carried out to dash board, intermediate plate and bottom plate with glue spreader, glue is low formaldehyde emission uf resin
Glue, single spreading amount is 220~235g/m2；
（6）Precompressed：By the good slab of assembly under 0.9~1.3MPa of unit pressure, 50~75min of precompressed；
（7）Hot pressing：Hot-forming, 0.7~1.1MPa of hot pressing pressure is carried out using hot press, temperature is 130~140 DEG C,
Time：20-25 minutes；It is then sent to quenched in balance storehouse；
（8）Cutting edge sanding：Above-mentioned slab is subjected to cutting edge, substrate layer is made, by low formaldehyde emission uf resin glue in then sanding
It is coated on two outer surfaces of above-mentioned basic unit's material, then pastes last layer poplar bark respectively as decoration on two outer surfaces
Layer, is then cold-pressed to the sheet material of laminating under 0.9~1.3MPa of unit pressure, is cold-pressed 55~70min of the time；Then again
Hot pressing, 0.7~1.1MPa of hot pressing pressure are carried out, temperature is 130~140 DEG C, time：20-25 minutes；
(9) finished product：Place to be cooled to after room temperature after hot pressing and spray one layer of ammonium acetate on the surface of plate, allow it to spontaneously dry, obtain
To low formaldehyde solid wooden compound floor.
The preparation method of above-mentioned low formaldehyde emission uf resin glue is：Formalin is added in a kettle., is adjusted with Na0H solution
It is 7.6~8.2 to save pH value, adds the hydroxymethyl cellulose of formalin weight 0.6%, adds the urine of formalin weight 15%
Element, is added in 47min, and temperature is risen into 53~56 DEG C, insulation reaction 50min from normal temperature；Afterwards, reaction solution addition formic acid is molten
Liquid, regulation reaction solution pH is 4.2~5.2, is added in the 43~47min of urea for adding formalin weight 24%, adds first
The oxidized tapioca of aldehyde solution weight 7%, temperature reaction liquid to 78~83 DEG C, insulation reaction 93min；Finally, it is molten with Na0H
Liquid adjusts pH to 8.0~8.5, and reaction temperature is down to 60~70 DEG C, adds the urea of formalin weight 43%, 40~45min
Inside add, add the melamine of formalin weight 0.6%, react 90min, be cooled to room temperature, can fully be used after reaction
The method of filtering filters out unnecessary urea, and the ammonium chloride or ammonium sulfate for adding Lauxite weight 0.8% are used as solidification
Agent carries out impregnation, adds 18% bean powder or swelled ground of formalin weight as filler, you can obtain low aldehyde ureaformaldehyde tree
Fat adhesive.
In the preparation method of above-mentioned low formaldehyde emission uf resin glue, the preparation method of oxidized tapioca used is：By wood
Sweet potato starch and water are according to tapioca:The weight ratio of water is 1:6 ratio is placed in reactor, is stirred, and agitating and heating makes
Temperature reaches 50-55 DEG C, then adds tapioca weight 1.7%, 3mol/L H2S04 And mass fraction is 5%, cassava
The KMn0 of starch weight 0.02%4Solution, stirring, and 50-55 DEG C of thermotonus one is kept more than hour until the face of solution
Discoloration is milky, stops reaction, obtains oxidized starch emulsion, obtained oxidized starch emulsion is washed with filter membrane, centrifuges, obtains
To Off-white solid, Off-white solid is dried into 3 h in 40 DEG C of drying boxes, volatilized completely to moisture, oxidized tapioca is made and forms sediment
Powder.
Quality testing：
The low formaldehyde emission uf resin adhesive that the present invention is prepared is surveyed according to the standards of GB/T 14074-2006
It is fixed, it is as a result as shown in the table：
Above-mentioned visible, the content of the free formaldehyde of urea-formaldehyde resin adhesive of the present invention for producing solid wooden compound floor is not
Only meet GB/T 14074-2006 standard, and the content of its free formaldehyde is substantially very low, and the present invention is produced
To be low formaldehyde solid wooden compound floor, its content of formaldehyde is low, the solid wooden compound floor high compared to residual formaldehyde content, uses
The low formaldehyde solid wooden compound floor of the present invention can reduce the injury to human body, and it is that low formaldehyde solid wood is combined that production, which obtains,
Floor quality is stable, it is not easy to damage；It is easy to install with comfortable foot feeling, wear-resisting, the characteristics of easy to clean and strong stability.
Claims (1)
1. a kind of production method of low formaldehyde solid wooden compound floor, it is characterised in that step is as follows：
（1）Plank blade：Rotary-cut is carried out to sheet material with peeler, veneer is obtained, and it is excessive to choose carrying small holes caused by worms, rotten, defect
Unqualified sheet material；
（2）Dry：Veneer is dried with drying machine, the moisture content of veneer is dropped to less than 12%；
（3）Repairing：The defect or flaw that include dry, crackle, knaur, bark pocket and knot occurred on veneer is carried out
Repairing；
（4）Selection：In obtained veneer, the dash board used in glued board is using toothed oak wood, Manchurian ash, green handle mulberry, Shan pahudia wood, pineapple lattice
Or the veneer of teak sheet material；Intermediate plate and bottom plate use the veneer of San Cheong sheet material, eucalyptus plate or birch lumber；
（5）Gluing：Gluing and assembly are carried out to dash board, intermediate plate and bottom plate with glue spreader, glue is low formaldehyde emission uf resin glue, single
Face glue-spread is 220~235g/m2；
（6）Precompressed：By the good slab of assembly under 0.9~1.3MPa of unit pressure, 50~75min of precompressed；
（7）Hot pressing：Hot-forming, 0.7~1.1MPa of hot pressing pressure is carried out using hot press, temperature is 130~140 DEG C, time：
20-25 minutes；It is then sent to quenched in balance storehouse；
（8）Cutting edge sanding：Above-mentioned slab is subjected to cutting edge, then sanding is made basic unit's material, low formaldehyde emission uf resin glue is coated
In on two outer surfaces of above-mentioned basic unit's material, then pasting last layer poplar bark respectively on two outer surfaces as decorative layer, so
The sheet material of laminating is cold-pressed under 0.9~1.3MPa of unit pressure afterwards, 55~70min of the time is cold-pressed；Then heat is carried out again
Pressure, 0.7~1.1MPa of hot pressing pressure, temperature is 130~140 DEG C, time：20-25 minutes；
(9) finished product：Placed after hot pressing, be cooled to after room temperature and spray one layer of ammonium acetate on the surface of plate, allow it to spontaneously dry, obtain
Low formaldehyde solid wooden compound floor；
The preparation method of described low formaldehyde emission uf resin glue is：Formalin is added in a kettle., and pH is adjusted with Na0H solution
It is worth for 7.6~8.2, the hydroxymethyl cellulose of addition formalin weight 0.4%~0.6%, addition formalin weight 12%
~15% urea, is added in 43~47min, and temperature is risen into 53~56 DEG C, 44~50min of insulation reaction from normal temperature；It
Afterwards, reaction solution adds formic acid solution, and regulation reaction solution pH is 4.2~5.2, adds the urine of formalin weight 24%~28%
Added in 43~47min of element, add formalin weight 4%-7% oxidized tapioca, temperature reaction liquid to 78~83
DEG C, 87~93min of insulation reaction；Finally, pH to 8.0~8.5 is adjusted with Na0H solution, reaction temperature is down to 60~70 DEG C, plus
Enter and added in the urea of formalin weight 38%~43%, 40~45min, add the melamine of formalin weight 0.6%
Amine, reacts 80~90min, is cooled to room temperature, fully filters out unnecessary urea with the method for filtering after reaction, adds ureaformaldehyde
The ammonium chloride or ammonium sulfate of weight resin 0.3%~0.8% carry out impregnation as curing agent, add formalin weight
14%~18% bean powder or swelled ground is used as filler, you can obtain low formaldehyde emission uf resin glue；
In the preparation method of described low formaldehyde emission uf resin glue, the preparation method of oxidized tapioca used is：By para arrowroot
Powder and water are according to tapioca:The weight ratio of water is 1:4-6 ratio is placed in reactor, is stirred, and agitating and heating makes temperature
Degree reaches 50-55 DEG C, then adds the H of tapioca weight 1.4%-1.7%, 3mol/L2S04 And mass fraction is 5%, wood
Sweet potato starch weight 0.015-0.02% KMn04Solution, stirring, and keep 50-55 DEG C of thermotonus one more than hour until
The color of solution is changed into milky, stops reaction, obtains oxidized starch emulsion, obtained oxidized starch emulsion is washed with filter membrane
Wash, centrifuge, obtain Off-white solid, Off-white solid is dried into 2-3 h in 40-50 DEG C, volatilized completely to moisture, oxygen is made
Change tapioca.
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| CN106272848B (en) * | 2016-08-29 | 2019-01-08 | 广西横县正林木业有限公司 | Using the method for weatherability composite urea formaldehyde resin production Eucalyptus birch composite floor board |
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| CN101396839A (en) * | 2007-09-30 | 2009-04-01 | 汤可新 | Preparation method of environmental protection type solid-wood composite floor |
| CN101391431A (en) * | 2008-09-23 | 2009-03-25 | 浙江世友木业有限公司 | Process method of large breadth wood composite floor |
| CN101927517B (en) * | 2009-06-25 | 2011-11-30 | 浙江升华云峰新材股份有限公司 | Process for producing multifunctional solid wood composite floor |
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| CN103395101B (en) * | 2013-07-19 | 2016-01-20 | 大亚(江苏)地板有限公司 | With the production technology of seeds three-layer wood composite flooring |
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