CN103362287A - Laminate wood flooring with ultralow formaldehyde release and production method thereof - Google Patents
Laminate wood flooring with ultralow formaldehyde release and production method thereof Download PDFInfo
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- CN103362287A CN103362287A CN2013103101921A CN201310310192A CN103362287A CN 103362287 A CN103362287 A CN 103362287A CN 2013103101921 A CN2013103101921 A CN 2013103101921A CN 201310310192 A CN201310310192 A CN 201310310192A CN 103362287 A CN103362287 A CN 103362287A
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Abstract
The invention discloses a laminate wood flooring and a production method thereof. The laminate wood flooring is manufactured by hot press molding, slitting, balancing, slotting and tenoning, and wax sealing an impregnated balance paper, a high density fiberboard, an impregnated decorative paper and an impregnated wear resistant paper, wherein the formaldehyde release amount of the laminate wood flooring is less than or equal to 0.2 mg/L; the impregnated balance paper, the impregnated decorative paper and the impregnated wear resistant paper are obtained after being impregnated by melamine formaldehyde resin; the formaldehyde release amount of three is less than or equal to 0.2 mg/L; before the high density fiberboard is processed, the formaldehyde release amount is less than or equal to 8.0 mg/100 g; the high density fiberboard is at least processed by the following four steps of coating and solidifying the surrounding side sections at least once by using a polyester paint; placing the high density fiberboard in a vacuum tank and vacuumizing until the vacuum degree is -0.08 to 0.08 MPa; importing liquid ammonia, controlling the ammonia concentration to be 700-900g/m3 after the liquid ammonia is gasified, and maintaining for 15-20 min under the condition; and balancing the obtained high density fiberboard for 2-3 days under a sealing condition, wherein the formaldehyde release amount of the obtained high density fiberboard is less than or equal to 1.5 mg/100 g, and the content of the ammonia is 16-25 mg/100 g.
Description
Technical field
The present invention relates to the laminated flooring technical field, especially relate to a kind of low formaldehyde and discharge laminated flooring; The invention still further relates to a kind of production method of laminated flooring.
Background technology
Laminated flooring also claims impregnated-paper laminated wood floor, is comprised of wearing layer, decorative layer, high density substrate layer, balance (protection against the tide) layer.Be with one or more layers dedicated paper dipping thermoset amino resin, mat formation on artificial board substrate top layers such as shaving board, high density fiberboards that the back side adds balance layer, the front adds wearing layer, through the floor of hot pressing, moulding.The laminated flooring environmental-protecting performance mainly uses the feature of environmental protection the subject of knowledge and the object of knowledge of fiberboard to determine by floor base material.The floor base material fiberboard that the urea-formaldehyde glue that adopts formaldehyde and urea high molar ratio technique to prepare is produced, its physical and mechanical property is good, but has the too high problem of burst size of methanal; The floor base material fiberboard that the urea-formaldehyde glue that adopts the low mol ratio technique of formaldehyde and urea to prepare is produced, its burst size of methanal is lower, but its physical and mechanical property is relatively poor, when particularly using the hot-forming floor of this base material, intensity thermal degradation rate reaches 30%～60%, the moisture-resistant water resistance of product descends greatly simultaneously, is difficult to satisfy instructions for use; The floor base material fiberboard that the urea-formaldehyde glue that adopts the moderate technique of formaldehyde and urea mol ratio to prepare is produced, recycling vacuum ammonia carry out post processing and fall aldehyde measure manufacturing environment-friendly type laminated flooring, can take into account the advantage of preceding method, overcome its shortcoming.Such as the burst size of methanal of the disclosed technology of CN101585203A for the method degrading pressed-fibre board of the appropriate vacuum of employing and low ammonia consumption, can produce that burst size of methanal is low, the laminated flooring of good physical and chemical properties, fall the halfway deficiency of aldehyde but still exist: this technique can only be produced the laminated flooring that burst size of methanal is 0.4-0.7mg/L (9-11 dryer method).It is low that the disclosed technology of CN102172945A can be produced burst size of methanal, the laminated flooring of good physical and chemical properties, but because of the residual quantity of ammonia higher, the sheet material thickness swelling rate is exceeded standard, the top section of sheet material treatment process particularly, because the side section coarse structure has exposed a large amount of pore of fiber, it sucks too much ammonia under condition of high vacuum degree makes the sheet material thickness swelling rate higher, for eliminating the side effect of ammonia, need take loaded down with trivial details, the time-consuming ammonia measure of falling, the production cycle of floor from the processing of vacuum ammonia to the tenon activities of slotting needs 25-90 days, and production efficiency is reduced greatly.The disclosed technology production cycle of CN101774200A is between aforementioned two kinds of methods, but still has ammonia treatment needs 5～8 h, and production efficiency is affected, and the aldehydes removal rate is undesirable: the product burst size of methanal is≤0.5mg/L (9-11 dryer method).Adopt the high density fiberboard burst size of methanal of modification adhesive manufacturing can reach lower level, but product cost rise 30%～40%.
Summary of the invention
In order to solve aforementioned technical problem, on the one hand, one of technical problem to be solved by this invention provides a kind of laminated flooring.
In order to solve the problems of the technologies described above, laminated flooring provided by the invention, from the top layer to the bottom, has successively the wear-resisting ply of paper of dipping, the dipping decorative paper layer, high-density fiberboard layer, dipping balance ply of paper, described laminated flooring is by the dipping balance paper that stacks successively, high density fiberboard after the ammonia treatment, dipping decorative paper, the dipping abrasion-proof paper is through hot-forming, cut, Balance Treatment, the fluting tenon, make behind the sealing wax, burst size of methanal≤the 0.2mg/L of described laminated flooring, it is characterized in that: described dipping balance paper, dipping decorative paper, the dipping abrasion-proof paper is for making burst size of methanal≤0.2mg/L behind the melamine resin dipping; High density fiberboard after the described ammonia treatment makes after following step process at least: thickness is that 8～15mm, top layer density are 0.92～0.95g/cm
3, the side section around the high density fiberboard of the burst size of methanal≤8.0mg/100g before unprocessed is coated with, solidifies through at least one Polyester Paint; High density fiberboard is placed vacuum tank, and being evacuated to vacuum is-0.08～-0.085 MPa; Pass into liquefied ammonia, the control ammonia concentration is 700～900g/m3 after the gasification, keeps with this understanding 15～20min; Gained high density fiberboard Balance Treatment 2～3 days under sealing condition, the high density fiberboard burst size of methanal that makes≤1.5 mg/100g, ammon amount 16～25 mg/100g.
Preferably, laminated flooring provided by the invention, described high density fiberboard is for using urea--the high density fiberboard that melamino-formaldehyde cocondensation resin adhesive is made, and described high density fiberboard production may further comprise the steps at least:
1) formaldehyde 1.4～1.5 in molar ratio: urea 1: the proportioning of melamine 0.1～0.2 prepares urea--melamino-formaldehyde cocondensation resin; Preparation process may further comprise the steps: formaldehyde is added in the reactor, with sodium hydrate regulator solution pH value 8～8.5; The urea that adds total amount 95%; Add melamine; Be warming up to 85～90 ℃ in 40～45 minutes, under 85～90 ℃ of temperature, be incubated 25～35 minutes; Regulate pH value to 4.5～5.0 with ammonium chloride solution, be incubated 40～60 minutes; Regulate pH value to 7～7.5 with sodium hydroxide solution, add the urea of surplus, be cooled to below 40 ℃ and make urea--melamino-formaldehyde cocondensation resin adhesive;
2) urea that upper step is obtained--melamino-formaldehyde cocondensation resin adhesive 100 weight portions are packed in the glue mixer; Adding 0.5～1.5 weight portion contains the 2wt% methenamine and 2wt% triethanolamine concentration is the NH of 20wt%
4Cl solution, 11～15 weight portion paraffin wax emulsions, mix, the prescription of described paraffin wax emulsions: paraffin 50 weight portions, oleic acid 4～7 weight portions, ammoniacal liquor 4～5 weight portions, 15wt%～30wt% synthetic fatty acid emulsified water 0.5～1 weight portion, dilution water 950～1200 weight portions, the paraffin wax emulsions process for preparation comprises: paraffin is added the emulsification pot, heat up, stir, add oleic acid after the fusing, stir, add ammoniacal liquor when temperature reaches 78 ℃, add 60%～70% emulsified water after 5 minutes, the emulsified water that adds surplus when temperature reaches 80 ℃, insulation is no less than 20 minutes in the time of 85～90 ℃, progressively adds dilution water;
3) resin glue that upper step is modulated is that fiber over dry quality 11wt%～13wt%, sandwich layer resin added are that the ratio of fiber over dry quality 9wt%～11wt% is delivered to the fiber sizing pipeline in high density fiberboard top layer resin added, fiber lay down is dressed up type, is hot pressed into plate after the applying glue, and making thickness and be 8～15 mm, burst size of methanal≤8.0 mg/100g, top layer density after cooling, modifier treatment 3～5 days, sanding is 0.92～0.95g/cm
3
On the other hand, technical problem to be solved by this invention provides a kind of production method of laminated flooring, and the production method of laminated flooring provided by the invention may further comprise the steps at least:
1) selecting thickness is that 8～15mm, top layer density are 0.92～0.95g/cm
3, the high density fiberboard of the burst size of methanal≤8.0mg/100g before unprocessed; Side section around the described high density fiberboard is coated with, solidifies through at least one Polyester Paint; High density fiberboard is placed vacuum tank, and being evacuated to vacuum is-0.08～-0.085 MPa; Pass into liquefied ammonia, the control ammonia concentration is 700～900g/m3 after the gasification, keeps with this understanding 15～20min; Gained high density fiberboard Balance Treatment 2～3 days under sealing condition; Obtain burst size of methanal≤1.5 mg/100g, ammon amount is the high density fiberboard of 16～25mg/100g;
2) flood dipping balance paper, dipping decorative paper, the dipping abrasion-proof paper that makes burst size of methanal≤0.2 mg/L with melamine resin;
3) high density fiberboard, dipping decorative paper, the dipping abrasion-proof paper after dipping balance paper, the ammonia treatment stacks successively, through hot-forming, cut, after the Balance Treatment, fluting tenon, sealing wax, make the laminated flooring of burst size of methanal≤0.2mg/L.
As further improvement technical scheme, the production method of laminated flooring provided by the invention, described high density fiberboard is for using urea--the high density fiberboard that melamino-formaldehyde cocondensation resin adhesive is made, and described high density fiberboard production may further comprise the steps at least:
1) formaldehyde 1.4～1.5 in molar ratio: urea 1: the proportioning of melamine 0.1～0.2 prepares urea--melamino-formaldehyde cocondensation resin; Preparation process may further comprise the steps: formaldehyde is added in the reactor, with sodium hydrate regulator solution pH value 8～8.5; The urea that adds total amount 95%; Add melamine; Be warming up to 85～90 ℃ in 40～45 minutes, under 85～90 ℃ of temperature, be incubated 25～35 minutes; Regulate pH value to 4.5～5.0 with ammonium chloride solution, be incubated 40～60 minutes; Regulate pH value to 7～7.5 with sodium hydroxide solution, add the urea of surplus, be cooled to below 40 ℃ and make urea--melamino-formaldehyde cocondensation resin adhesive;
2) urea that upper step is obtained--melamino-formaldehyde cocondensation resin adhesive 100 weight portions are packed in the glue mixer; Adding 0.5～1.5 weight portion contains the 2wt% methenamine and 2wt% triethanolamine concentration is the NH of 20wt%
4Cl solution, 11～15 weight portion paraffin wax emulsions, mix, the prescription of described paraffin wax emulsions: paraffin 50 weight portions, oleic acid 4～7 weight portions, ammoniacal liquor 4～5 weight portions, 15wt%～30wt% synthetic fatty acid emulsified water 0.5～1 weight portion, dilution water 950～1200 weight portions, the paraffin wax emulsions process for preparation may further comprise the steps: paraffin is added the emulsification pot, heat up, stir, add oleic acid after the fusing, stir, add ammoniacal liquor when temperature reaches 78 ℃, add 60%～70% emulsified water after 5 minutes, the emulsified water that adds surplus when temperature reaches 80 ℃, insulation is no less than 20 minutes in the time of 85～90 ℃, progressively adds dilution water;
3) the resin adhesive that upper step is modulated is that fiber over dry quality 11wt%～13wt%, sandwich layer resin added are that the ratio of fiber over dry quality 9wt%～11wt% is delivered to the fiber sizing pipeline in high density fiberboard top layer resin added, fiber lay down is dressed up type, is hot pressed into plate after the applying glue, and making thickness and be 8～15mm, burst size of methanal≤8.0 mg/100g, top layer density after cooling, modifier treatment 3～5 days, sanding is 0.92～0.95g/cm
3High density fiberboard.
The beneficial effect that the present invention brings: compare with existing laminated flooring product, the production cycle of floor from the processing of vacuum ammonia to the tenon activities of slotting only needs 6～10 days, and production efficiency is improved greatly; High density fiberboard is selected better ammonia treatment technique and processed rear product has lower thickness swelling rate; Selecting top layer density is that the high density fiberboard of 0.92～0.95g/m3 has preferably technique effect, and the product burst size of methanal is low; With carrying out ammonia treatment behind the side section around the Polyester Paint coating rear enclosed high density fiberboard, the uniformity of each position ammonia content of sheet material is better, can stabilized product quality.
The specific embodiment
Embodiment is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.
Embodiment 1: the manufacturing process of laminated flooring is as follows:
1, produce high density fiberboard, manufacturing process may further comprise the steps:
1) formaldehyde 1.5 in molar ratio: urea 1: the proportioning of melamine 0.1 prepares urea--melamino-formaldehyde cocondensation resin; Preparation process may further comprise the steps: formaldehyde is added in the reactor, with sodium hydrate regulator solution pH value 8.5; The urea that adds urea total amount 95%; Add melamine; Be warming up to 90 ℃ in 45 minutes, insulation is 25 minutes under 90 ℃ of temperature; Regulate pH value 5.0 with ammonium chloride solution, be incubated 60 minutes; Regulate pH value 7.5 with sodium hydroxide solution, add the urea of surplus, be cooled to below 40 ℃ and make urea--melamino-formaldehyde cocondensation resin adhesive;
2) urea that upper step is obtained--melamino-formaldehyde cocondensation resin adhesive 100 weight portions are packed in the glue mixer; Add that 1.5 weight portions contain the 2wt% methenamine and 2wt% triethanolamine concentration is the NH of 20wt%
4Cl solution, 15 weight portion paraffin wax emulsions, mix, the prescription of described paraffin wax emulsions: paraffin 50 weight portions, oleic acid 7 weight portions, ammoniacal liquor 5 weight portions, 30wt% synthetic fatty acid emulsified water 0.5 weight portion, dilution water 1200 weight portions, the paraffin wax emulsions process for preparation may further comprise the steps: paraffin is added the emulsification pot, heat up, stir, add oleic acid after the fusing, stir, add ammoniacal liquor when temperature reaches 78 ℃, the emulsified water of adding 2/3 after 5 minutes, the emulsified water that adds surplus when temperature reaches 80 ℃, insulation is 25 minutes in the time of 90 ℃, progressively adds dilution water;
3) the resin adhesive that upper step is modulated is that fiber over dry quality 13wt%, sandwich layer resin added are that the ratio of fiber over dry quality 9wt% is delivered to the fiber sizing pipeline in high density fiberboard top layer resin added, fiber lay down is dressed up type, is hot pressed into plate after the applying glue, and making thickness and be 15mm, burst size of methanal≤8.0 mg/100g, top layer density after cooling, modifier treatment 5 days, sanding is 0.92g/cm
3High density fiberboard.
4) side section around the high density fiberboard that step obtains on is after one Polyester Paint is coated with, solidifies; High density fiberboard is placed vacuum tank, be evacuated to vacuum and be-0.08 MPa; Pass into liquefied ammonia, the control ammonia concentration is 700g/m3 after the gasification, keeps with this understanding 20min; The gained high density fiberboard covers plastic film cover Balance Treatment 2 days; Obtain burst size of methanal≤1.5 mg/100g, ammon amount is the high density fiberboard of 16mg/100g;
2, produce dipping balance paper, dipping decorative paper, dipping abrasion-proof paper, manufacturing process may further comprise the steps: balance paper, facing paper, abrasion-proof paper flood with melamine resin, make dipping balance paper, dipping decorative paper, the dipping abrasion-proof paper of burst size of methanal≤0.2 mg/L;
3, high density fiberboard, dipping decorative paper, the dipping abrasion-proof paper after dipping balance paper, the ammonia treatment stacks successively, through hot-forming, cut, after the Balance Treatment, fluting tenon, sealing wax, make the laminated flooring of burst size of methanal≤0.2mg/L.
Embodiment 2: the manufacturing process of laminated flooring is as follows:
1, produce high density fiberboard, manufacturing process may further comprise the steps:
1) formaldehyde 1.45 in molar ratio: urea 1: the proportioning of melamine 0.15 prepares urea--melamino-formaldehyde cocondensation resin; Preparation process may further comprise the steps: formaldehyde is added in the reactor, with sodium hydrate regulator solution pH value 8.3; The urea that adds urea total amount 95%; Add melamine; Be warming up to 88 ℃ in 43 minutes, insulation is 30 minutes under 88 ℃ of temperature; Regulate pH value 4.7 with ammonium chloride solution, be incubated 50 minutes; Regulate pH value 7.3 with sodium hydroxide solution, add the urea of surplus, be cooled to below 40 ℃ and make urea--melamino-formaldehyde cocondensation resin adhesive;
2) urea that upper step is obtained--melamino-formaldehyde cocondensation resin adhesive 100 weight portions are packed in the glue mixer; Add that 1 weight portion contains the 2wt% methenamine and 2wt% triethanolamine concentration is the NH of 20wt%
4Cl solution, 12 weight portion paraffin wax emulsions, mix, the prescription of described paraffin wax emulsions: paraffin 50 weight portions, oleic acid 5.5 weight portions, ammoniacal liquor 4.5 weight portions, 23wt% synthetic fatty acid emulsified water 0.8 weight portion, dilution water 1100 weight portions, the paraffin wax emulsions process for preparation may further comprise the steps: paraffin is added the emulsification pot, heat up, stir, add oleic acid after the fusing, stir, add ammoniacal liquor when temperature reaches 78 ℃, the emulsified water of adding 60% after 5 minutes, the emulsified water that adds surplus when temperature reaches 80 ℃, insulation is 30 minutes in the time of 88 ℃, progressively adds dilution water;
3) the resin adhesive that upper step is modulated is that fiber over dry quality 12wt%, sandwich layer resin added are that the ratio of fiber over dry quality 10wt% is delivered to the fiber sizing pipeline in high density fiberboard top layer resin added, fiber lay down is dressed up type, is hot pressed into plate after the applying glue, and making thickness after cooling, modifier treatment 4 days, sanding is that 12mm, burst size of methanal≤8.0mg/100g, top layer density are 0.94g/cm
3High density fiberboard.
4) side section around the high density fiberboard that obtains of upper step after one Polyester Paint be coated with, solidifies again through the second Polyester Paint be coated with, after the curing; High density fiberboard is placed vacuum tank, be evacuated to vacuum and be-0.082 MPa; Pass into liquefied ammonia, the control ammonia concentration is 800g/m3 after the gasification, keeps with this understanding 18min; The gained high density fiberboard covers plastic film cover Balance Treatment 2.5 days; Obtain burst size of methanal≤1.5 mg/100g, ammon amount is the high density fiberboard of 20.2mg/100g;
2, produce dipping balance paper, dipping decorative paper, dipping abrasion-proof paper, manufacturing process may further comprise the steps: balance paper, facing paper, abrasion-proof paper flood with melamine resin, make dipping balance paper, dipping decorative paper, the dipping abrasion-proof paper of burst size of methanal≤0.2 mg/L;
3, high density fiberboard, dipping decorative paper, the dipping abrasion-proof paper after dipping balance paper, the ammonia treatment stacks successively, through hot-forming, cut, after the Balance Treatment, fluting tenon, sealing wax, make the laminated flooring of burst size of methanal≤0.2mg/L.
Embodiment 3: the manufacturing process of laminated flooring is as follows:
1, produce high density fiberboard, manufacturing process may further comprise the steps:
1) formaldehyde 1.4 in molar ratio: urea 1: the proportioning of melamine 0.2 prepares urea--melamino-formaldehyde cocondensation resin; Preparation process may further comprise the steps: formaldehyde is added in the reactor, with sodium hydrate regulator solution pH value 8; The urea that adds urea total amount 95%; Add melamine; Be warming up to 85 ℃ in 40 minutes, insulation is 35 minutes under 85 ℃ of temperature; Regulate pH value 4.5 with ammonium chloride solution, be incubated 40 minutes; Regulate pH value 7 with sodium hydroxide solution, add the urea of surplus, be cooled to below 40 ℃ and make urea--melamino-formaldehyde cocondensation resin adhesive;
2) urea that upper step is obtained--melamino-formaldehyde cocondensation resin adhesive 100 weight portions are packed in the glue mixer; Add that 0.5 weight portion contains the 2wt% methenamine and 2wt% triethanolamine concentration is the NH of 20wt%
4Cl solution, 11 weight portion paraffin wax emulsions, mix, the prescription of described paraffin wax emulsions: paraffin 50 weight portions, oleic acid 4 weight portions, ammoniacal liquor 4 weight portions, 15wt% synthetic fatty acid emulsified water 1 weight portion, dilution water 950 weight portions, the paraffin wax emulsions process for preparation may further comprise the steps: paraffin is added the emulsification pot, heat up, stir, add oleic acid after the fusing, stir, add ammoniacal liquor when temperature reaches 78 ℃, the emulsified water of adding 70% after 5 minutes, the emulsified water that adds surplus when temperature reaches 80 ℃, insulation is 20 minutes in the time of 85 ℃, progressively adds dilution water;
3) the resin adhesive that upper step is modulated is that fiber over dry quality 11wt%, sandwich layer resin added are that the ratio of fiber over dry quality 11wt% is delivered to the fiber sizing pipeline in high density fiberboard top layer resin added, fiber lay down is dressed up type, is hot pressed into plate after the applying glue, and making thickness and be 8mm, burst size of methanal≤8.0 mg/100g, top layer density after cooling, modifier treatment 3 days, sanding is 0.95g/cm
3High density fiberboard.
4) side section around the high density fiberboard that obtains of upper step after one Polyester Paint be coated with, solidifies again through the second Polyester Paint be coated with, after the curing; High density fiberboard is placed vacuum tank, be evacuated to vacuum and be-0.085 MPa; Pass into liquefied ammonia, the control ammonia concentration is 900g/m3 after the gasification, keeps with this understanding 15min; The gained high density fiberboard covers plastic film cover Balance Treatment 3 days; Obtain burst size of methanal≤1.5 mg/100g, ammon amount is the high density fiberboard of 25.1mg/100g;
2, produce dipping balance paper, dipping decorative paper, dipping abrasion-proof paper, manufacturing process may further comprise the steps: balance paper, facing paper, abrasion-proof paper flood with melamine resin, make dipping balance paper, dipping decorative paper, the dipping abrasion-proof paper of burst size of methanal≤0.2 mg/L;
3, high density fiberboard, dipping decorative paper, the dipping abrasion-proof paper after dipping balance paper, the ammonia treatment stacks successively, through hot-forming, cut, after the Balance Treatment, fluting tenon, sealing wax, make the laminated flooring of burst size of methanal≤0.2mg/L.
The laminated flooring of embodiment preparation, after testing physical and chemical index such as following table.
The burst size of methanal of the laminated flooring that makes reaches Japanese F ☆ ☆ ☆ ☆ grade standard according to Japanese JIS A 1460:2001 standard dryer method assay≤0.2mg/L.
Comparative group 1: the present invention uses urea--and melamino-formaldehyde cocondensation resin adhesive is made high density fiberboard, the comparative example organizes 1 high density fiberboard of selecting alternate manner to obtain, in the identical situation of other condition, detect ammonia content and thickness swelling rate, the contrast test data are as follows:
As can be seen from the table, when the high density fiberboard ammonia content that technical solution of the present invention obtains is 16.0～25.1mg/100g, the sheet material thickness swelling rate only is 2.7～4.0%, be much better than LY/T 1611-2011 standard-required, and the thickness swelling rate of comparative group sheet material is up to 11.5～19.6%, all above LY/T 1611-2011 standard (≤10%) scope; When the floor ammonia content that technical solution of the present invention obtains is 10.9～19.5mg/100g, the floor thickness swelling rate only is 3.8%～6.2%, be better than the requirement of GB/T 18102-2007 standard≤18% index, and comparative group sheet material thickness swelling rate is up to 11.8～12.6%.
Comparative group 2: relatively high density fiberboard top layer density is on the impact of the ammonia treatment effect of technical solution of the present invention, selecting the high density fiberboard of different top layers density is under the 821g/m3 condition in vacuum for-0.083 MPa, ammonia concentration, and it is as follows to process the performance data that detects sheet material after 20 minutes:
The detection data show: when the top layer of high density fiberboard density was higher than 0.95g/m3, amino molecule can not effectively infiltrate sheet material inside; When top layer density was lower than 0.92g/m3, it is inner that amino molecule is easy to excessive suction sheet material; When being 0.92～0.95g/m3, the top layer of high density fiberboard density has preferably technique effect.
Comparative group 3: technical solution of the present invention is sealed it with side section around the Polyester Paint coating high density fiberboard, whether affects the contrast of each position ammonia content of sheet material, and it is as follows to detect data:
Test result shows: with side section around the Polyester Paint coating rear enclosed high density fiberboard, the uniformity of each position ammonia content of sheet material is better, otherwise has larger otherness.
Comparative group 4: when technical solution of the present invention is carried out ammonia treatment, select different ammonia concentrations to test, test data is as follows:
Test result shows: ammonia concentration is that 700～900g/m3 has preferably technique effect.
Comparative group 5: technical solution of the present invention adopts the dipping balance paper, dipping decorative paper, dipping abrasion-proof paper of different burst size of methanal on the impact of floor burst size of methanal, and test data is as follows:
Used dipping abrasion-proof paper, dipping decorative paper, dipping balance paper all adopt the melamine resin dipping in the Comparative Examples, burst size of methanal detects according to GB/T 28995-2012 " artificial board decorative dedicated paper " method, and the floor burst size of methanal adopts JIS A 1460:2001 method to detect.Test result shows: the melamine resin dipping abrasion-proof paper of preferred burst size of methanal≤0.2 mg/L, dipping decorative paper, dipping balance paper have lower burst size of methanal.
Among the present invention, wear-resisting value, MOR, internal bond strength, surface bonding intensity, thickness swelling rate, dimensional stability, burst size of methanal detect according to GB/T 18102-2007 " impregnated-paper laminated wood floor " standard.Adopt " profile density instrument " to detect high density fiberboard density and top layer density.
The ammonia content on fiberboard or floor is measured and is pressed 4.11.5.4 operation among the GB/T17657-1999, the 100ml extract is moved in the 250ml iodine flask, add 3-5 and drip phenolphthalein indicator, carry out titration with hydrochloric acid standard solution, be terminal point when solution is become colorless by redness, carry out simultaneously blank test.Sheet material free ammonia content is calculated as follows:
In the formula: NH
3The milligram number (mg/100g) of-100 g test specimen free ammonias;
H---test specimen moisture content (%);
M 0 ---be used for the test specimen quality (g) of extract;
V 0 ---titration blank solution hydrochloric acid consumes volume (ml);
V 1 ---titration extract hydrochloric acid consumes volume (ml);
V 2 ---take the volume (ml) of extract during titration;
C---the molar concentration (mol/L) of hydrochloric acid standard solution;
17---ammonia (NH
3) molal weight (g/mol).
For a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. laminated flooring, from the top layer to the bottom, has successively the wear-resisting ply of paper of dipping, the dipping decorative paper layer, high-density fiberboard layer, dipping balance ply of paper, described laminated flooring is by the dipping balance paper that stacks successively, high density fiberboard after the ammonia treatment, dipping decorative paper, the dipping abrasion-proof paper is through hot-forming, cut, Balance Treatment, the fluting tenon, make behind the sealing wax, burst size of methanal≤the 0.2mg/L of described laminated flooring, it is characterized in that: described dipping balance paper, dipping decorative paper, the dipping abrasion-proof paper is for making burst size of methanal≤0.2 mg/L behind the melamine resin dipping; High density fiberboard after the described ammonia treatment makes after following step process at least: thickness is that 8～15mm, top layer density are 0.92～0.95g/cm
3, the side section around the high density fiberboard of the burst size of methanal≤8.0mg/100g before unprocessed is coated with, solidifies through at least one Polyester Paint; High density fiberboard is placed vacuum tank, and being evacuated to vacuum is-0.08～-0.085 MPa; Pass into liquefied ammonia, the control ammonia concentration is 700～900g/m3 after the gasification, keeps with this understanding 15～20min; Gained high density fiberboard Balance Treatment 2～3 days under sealing condition, the high density fiberboard burst size of methanal that makes≤1.5 mg/100g, ammon amount 16～25 mg/100g.
2. laminated flooring according to claim 1 is characterized in that: described high density fiberboard is for using urea--the high density fiberboard that melamino-formaldehyde cocondensation resin adhesive is made, and described high density fiberboard production may further comprise the steps at least:
1) formaldehyde 1.4～1.5 in molar ratio: urea 1: the proportioning of melamine 0.1～0.2 prepares urea--melamino-formaldehyde cocondensation resin; Preparation process may further comprise the steps: formaldehyde is added in the reactor, with sodium hydrate regulator solution pH value 8～8.5; The urea that adds total amount 95%; Add melamine; Be warming up to 85～90 ℃ in 40～45 minutes, under 85～90 ℃ of temperature, be incubated 25～35 minutes; Regulate pH value to 4.5～5.0 with ammonium chloride solution, be incubated 40～60 minutes; Regulate pH value to 7～7.5 with sodium hydroxide solution, add the urea of surplus, be cooled to below 40 ℃ and make urea--melamino-formaldehyde cocondensation resin adhesive;
2) urea that upper step is obtained--melamino-formaldehyde cocondensation resin adhesive 100 weight portions are packed in the glue mixer; Adding 0.5～1.5 weight portion contains the 2wt% methenamine and 2wt% triethanolamine concentration is the NH of 20wt%
4Cl solution, 11～15 weight portion paraffin wax emulsions, mix, the prescription of described paraffin wax emulsions: paraffin 50 weight portions, oleic acid 4～7 weight portions, ammoniacal liquor 4～5 weight portions, 15wt%～30wt% synthetic fatty acid emulsified water 0.5～1 weight portion, dilution water 950～1200 weight portions, the paraffin wax emulsions process for preparation comprises: paraffin is added the emulsification pot, heat up, stir, add oleic acid after the fusing, stir, add ammoniacal liquor when temperature reaches 78 ℃, add 60%～70% emulsified water after 5 minutes, the emulsified water that adds surplus when temperature reaches 80 ℃, insulation is no less than 20 minutes in the time of 85～90 ℃, progressively adds dilution water;
3) resin glue that upper step is modulated is that fiber over dry quality 11wt%～13wt%, sandwich layer resin added are that the ratio of fiber over dry quality 9wt%～11wt% is delivered to the fiber sizing pipeline in high density fiberboard top layer resin added, fiber lay down is dressed up type, is hot pressed into plate after the applying glue, and making thickness and be 8～15 mm, burst size of methanal≤8.0 mg/100g, top layer density after cooling, modifier treatment 3～5 days, sanding is 0.92～0.95g/cm
3
3. laminated flooring production method may further comprise the steps at least:
1) selecting thickness is that 8～15mm, top layer density are 0.92～0.95g/cm
3, the high density fiberboard of the burst size of methanal≤8.0mg/100g before unprocessed; Side section around the described high density fiberboard is coated with, solidifies through at least one Polyester Paint; High density fiberboard is placed vacuum tank, and being evacuated to vacuum is-0.08～-0.085 MPa; Pass into liquefied ammonia, the control ammonia concentration is 700～900g/m3 after the gasification, keeps with this understanding 15～20min; Gained high density fiberboard Balance Treatment 2～3 days under sealing condition; Obtain burst size of methanal≤1.5 mg/100g, ammon amount is the high density fiberboard of 16～25mg/100g;
2) flood dipping balance paper, dipping decorative paper, the dipping abrasion-proof paper that makes burst size of methanal≤0.2 mg/L with melamine resin;
3) high density fiberboard, dipping decorative paper, the dipping abrasion-proof paper after dipping balance paper, the ammonia treatment stacks successively, through hot-forming, cut, after the Balance Treatment, fluting tenon, sealing wax, make the laminated flooring of burst size of methanal≤0.2mg/L.
4. laminated flooring production method according to claim 3, it is characterized in that: described high density fiberboard is for using urea---the high density fiberboard that melamino-formaldehyde cocondensation resin adhesive is made, and described high density fiberboard production may further comprise the steps at least:
1) formaldehyde 1.4～1.5 in molar ratio: urea 1: the proportioning of melamine 0.1～0.2 prepares urea--melamino-formaldehyde cocondensation resin; Preparation process may further comprise the steps: formaldehyde is added in the reactor, with sodium hydrate regulator solution pH value 8～8.5; The urea that adds total amount 95%; Add melamine; Be warming up to 85～90 ℃ in 40～45 minutes, under 85～90 ℃ of temperature, be incubated 25～35 minutes; Regulate pH value to 4.5～5.0 with ammonium chloride solution, be incubated 40～60 minutes; Regulate pH value to 7～7.5 with sodium hydroxide solution, add the urea of surplus, be cooled to below 40 ℃ and make urea--melamino-formaldehyde cocondensation resin adhesive;
2) urea that upper step is obtained--melamino-formaldehyde cocondensation resin adhesive 100 weight portions are packed in the glue mixer; Adding 0.5～1.5 weight portion contains the 2wt% methenamine and 2wt% triethanolamine concentration is the NH of 20wt%
4Cl solution, 11～15 weight portion paraffin wax emulsions, mix, the prescription of described paraffin wax emulsions: paraffin 50 weight portions, oleic acid 4～7 weight portions, ammoniacal liquor 4～5 weight portions, 15wt%～30wt% synthetic fatty acid emulsified water 0.5～1 weight portion, dilution water 950～1200 weight portions, the paraffin wax emulsions process for preparation may further comprise the steps: paraffin is added the emulsification pot, heat up, stir, add oleic acid after the fusing, stir, add ammoniacal liquor when temperature reaches 78 ℃, add 60%～70% emulsified water after 5 minutes, the emulsified water that adds surplus when temperature reaches 80 ℃, insulation is no less than 20 minutes in the time of 85～90 ℃, progressively adds dilution water;
3) the resin adhesive that upper step is modulated is that fiber over dry quality 11wt%～13wt%, sandwich layer resin added are that the ratio of fiber over dry quality 9wt%～11wt% is delivered to the fiber sizing pipeline in high density fiberboard top layer resin added, fiber lay down is dressed up type, is hot pressed into plate after the applying glue, and making thickness and be 8～15mm, burst size of methanal≤8.0 mg/100g, top layer density after cooling, modifier treatment 3～5 days, sanding is 0.92～0.95g/cm
3High density fiberboard.
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| CN104314272A (en) * | 2014-11-06 | 2015-01-28 | 湖南圣保罗木业有限公司 | Laminate wood flooring and manufacturing method thereof |
| CN104985655A (en) * | 2015-06-23 | 2015-10-21 | 湖南圣保罗木业有限公司 | Aldehyde reducing technology for medium-high density fiberboards |
| CN107839051A (en) * | 2016-09-18 | 2018-03-27 | 中山市大自然木业有限公司 | A kind of method of high density fiberboard for producing the release of zero aldehyde and impregnated paper laminated wood floor and its production method containing the fiberboard |
| CN109703156A (en) * | 2019-01-18 | 2019-05-03 | 索菲亚家居股份有限公司 | A kind of low smell Kang Chun plate and its preparation process of nearly zero release of formaldehyde |
| CN110056147A (en) * | 2019-05-05 | 2019-07-26 | 广东耀东华装饰材料科技有限公司 | A kind of wooden fancy veneer and preparation method thereof |
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| CN113389347A (en) * | 2021-07-14 | 2021-09-14 | 德尔未来科技控股集团股份有限公司 | High-simulation digital printing decorative paper laminate wood floor and preparation method thereof |
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| CN104314272A (en) * | 2014-11-06 | 2015-01-28 | 湖南圣保罗木业有限公司 | Laminate wood flooring and manufacturing method thereof |
| CN104314272B (en) * | 2014-11-06 | 2017-02-15 | 湖南圣保罗木业有限公司 | Laminate wood flooring and manufacturing method thereof |
| CN104985655A (en) * | 2015-06-23 | 2015-10-21 | 湖南圣保罗木业有限公司 | Aldehyde reducing technology for medium-high density fiberboards |
| CN107839051A (en) * | 2016-09-18 | 2018-03-27 | 中山市大自然木业有限公司 | A kind of method of high density fiberboard for producing the release of zero aldehyde and impregnated paper laminated wood floor and its production method containing the fiberboard |
| CN109703156A (en) * | 2019-01-18 | 2019-05-03 | 索菲亚家居股份有限公司 | A kind of low smell Kang Chun plate and its preparation process of nearly zero release of formaldehyde |
| CN110056147A (en) * | 2019-05-05 | 2019-07-26 | 广东耀东华装饰材料科技有限公司 | A kind of wooden fancy veneer and preparation method thereof |
| CN110591560A (en) * | 2019-09-19 | 2019-12-20 | 杭州海维特化工科技有限公司 | Wax sealing agent for mortises of laminate flooring and preparation method of wax sealing agent |
| CN110591560B (en) * | 2019-09-19 | 2021-04-30 | 杭州海维特化工科技有限公司 | Wax sealing agent for mortises of laminate flooring and preparation method of wax sealing agent |
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| CN114350111A (en) * | 2021-12-24 | 2022-04-15 | 常州市贝美家居科技有限公司 | Floor and preparation method thereof |
| CN114350111B (en) * | 2021-12-24 | 2023-09-19 | 常州市贝美家居科技有限公司 | Floor and preparation method thereof |
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Effective date of registration: 20190828 Address after: 437099 Xian'an Economic Development Zone, Xianning City, Hubei Province Patentee after: Hubei Sao Paulo Wood Industry Co., Ltd. Address before: Changsha County City, Hunan province 410151 Changsha Sha town pond embankment No. 888 Patentee before: Hunan Stpaul Wood Industry Co., Ltd. |