CN101549519A - Manufacturing method of high-moisture-proof and high-density fiber board - Google Patents
Manufacturing method of high-moisture-proof and high-density fiber board Download PDFInfo
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- CN101549519A CN101549519A CNA2009100147787A CN200910014778A CN101549519A CN 101549519 A CN101549519 A CN 101549519A CN A2009100147787 A CNA2009100147787 A CN A2009100147787A CN 200910014778 A CN200910014778 A CN 200910014778A CN 101549519 A CN101549519 A CN 101549519A
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Abstract
The invention provides a manufacturing method of high-moisture-proof and high-density fiber board, pertaining to the technical field of board manufacture. The method comprises the following steps: melamine-formaldehyde resin and urea resin are respectively prepared, and then the melamine-formaldehyde resin and the urea resin are mixed into a mixed glue before use; after lumber is chipped into wood chips, the wood chips are cooked and then prepared into wood fiber by defibrating of a defibrator, the mixed glue of the melamine-formaldehyde resin and the urea resin prepared before use, a solidified agent and wax waterproof agent are added to the wood fiber in the fiber ejecting pipe of the defibrator, the wood fiber is dried, paved and shaped, the pavement density is adjusted, and the wood fiber is pressed into board by a thermocompressor. The method is convenient and safe in operation and can respectively enhance the rational polymerization degree of the mixed glue and improve the waterproof property and glue-joint strength of the mixed glue and the stability during the use and storage period. The high-density fiber board prepared by the method is more applicable to a moist condition.
Description
Technical field
The present invention relates to the board making technical field, the preparation method of the high density fiberboard of a kind of high protection against the tide specifically.
Background technology
The purpose that high moistureproof high density fiberboard is made is to make plate and goods be applicable to that humid climate or environment use down.Physical and mechanical property such as thickness swelling rate, internal bond strength etc. in humid climate or environment lower plate still keep index preferably.The humidity resistance of plate depends primarily on the preparation method of used adhesive type and adhesive.At present high moistureproof high density fiberboard adopts cost lower and have the adhesive of the melamine of better humidity resistance to the Lauxite modification basically, also has to use water resistance phenolic resins and methyl diphenylene diisocyanate (MDI) are made high moistureproof high density fiberboard preferably.Yet the phenolic resins cost is higher, color is rufous, can cause color stain to plain plate, the raw material phenol that uses when resin is made can make the human body protein sex change under low consistency conditions, can make albumen precipitation during high concentration, skin, mucous membrane there are strong corrosiveness, can suppress central nervous system or infringement liver, renal function when serious.The present cost of MDI is very high, the volatile matter of MDI and uncured before swim in the workshop the fibre dust that applies MDI can damage human respiratory, therefore need take special safety prevention measure when phenolic resins and MDI make moistureproof fiberboard, both cost height make to use to be restricted in addition.Then cost is minimum to the adhesive of Lauxite modification for melamine by contrast, safe ready.Melamine is to add a certain amount of melamine to carry out addition and polycondensation reaction jointly when Lauxite is made to the adhesive of Lauxite modification.But the shortcoming of the method is to join when a certain amount of when melamine, under solutions of weak acidity polycondensation reaction just very fierce, reaction is difficult to control, resin is aging easily, storage time is short, and glue-joint strength reduces, and therefore the dosage of the melamine with humidity resistance is restricted.When melamine add quantity not sufficient the time, can the humidity resistance of plate be had a negative impact.
Summary of the invention
Technical assignment of the present invention is to solve the deficiencies in the prior art, and a kind of preparation method of high density fiberboard of high protection against the tide is provided.
Technical scheme of the present invention realizes in the following manner, the preparation method of the high density fiberboard of this a kind of high protection against the tide, it is characterized in that making melamine resin and Lauxite respectively earlier, carry out the mixed glue that is mixed into of melamine resin and Lauxite then before use; After woodchip is machined to wood chip, by carrying out first boiling, then making wood-fibred by the defibrator defibrator process, in the fiber of defibrator ejection pipeline, wood-fibred applied the melamine resin of preparation before using and Lauxite mixed glue, curing agent, paraffin water repellent, after drying, the moulding of mating formation, the adjustment density of mating formation is again through the hot press pressing plate.
Melamine resin is to be that 1.70-2.30 carries out polycondensation reaction and makes by formaldehyde and melamine according to mol ratio.
The preparation process of melamine resin is to transfer formalin to PH=8.5-9.0 with 30% NaOH in reactor, add melamine, carry out polycondensation reaction at 80-90 ℃, polymerization reaction time 1-2h, be cooled to 35 ℃, transfer PH=8.5-9.0 to obtain.
Lauxite is to be that 0.80-1.30 carries out polycondensation reaction and makes by formaldehyde and urea according to mol ratio.
The preparation process of Lauxite is to transfer formalin to PH=7.5 with 30% NaOH, gradation adds urea in formalin, when low temperature, carry out earlier addition reaction under the weak basic condition, be warming up to 85-90 ℃ then and under the PH=4.5-5.5 condition, carry out polycondensation reaction, the about 2.0-3.0h of polymerization reaction time is 40-60 centipoise (25 ℃) to reacting viscosity, transfers PH=7.5-8.0, be cooled to 35 ℃, under the PH=7.5-8.0 condition, store.
The mixed method of melamine resin and Lauxite is that proportion that the melamine resin that will prepare and Lauxite are 0.40-3 evenly mixes under 25-35 ℃ of condition and makes according to mol ratio.
The addition of melamine resin and Lauxite mixed glue is the 10%-15% of over dry wood-fibred weight.
The addition of paraffin water repellent is the 1.0%-2.0% of over dry wood-fibred weight.
The beneficial effect that the present invention is compared with prior art produced is:
The preparation method of the high density fiberboard of this height protection against the tide has adopted melamine-formaldehyde resin and Lauxite to make separately respectively, the method of mixing before use then, can make two kinds of resins of melamine resin and Lauxite in specific separately addition respectively, obtain sufficient addition and polymerization under the polycondensation condition, easy to operate, safety, can improve the reasonable degree of polymerization of melamine-formaldehyde resin and Lauxite and mixed glue thereof respectively, improve the water resistance of melamine resin and Lauxite mixed glue, the stability of glue-joint strength and use and storage period, the high density fiberboard that utilizes this method to make more is applicable under weather or the humid environment condition and uses, be used to make furniture, the panel of exterior door and ornament materials also can be used for the making of the base material of moistureproof laminated flooring.
The specific embodiment
Below in conjunction with embodiment the preparation method of the high density fiberboard of a kind of high protection against the tide of the present invention is done following detailed description the in detail.
Preparation method to the high density fiberboard of a kind of high protection against the tide of the present invention provides embodiment:
Embodiment 1:
The preparation method of the high density fiberboard of this height protection against the tide is made earlier melamine resin and Lauxite respectively:
(1) moistureproof melamine resin preparation method
In reactor, transfer formalin to PH=8.5 with 30% NaOH, according to formaldehyde and melamine is that 2: 1 amount joins melamine in the formalin according to mol ratio, carry out polycondensation reaction at 80-90 ℃, the about 1.5h of polymerization reaction time, to reacting viscosity is 40-55 centipoise (25 ℃), be cooled to 35 ℃, under the PH=8.5 condition, store.
(2) Lauxite preparation method:
In reactor, transfer formalin to PH=7.5 with 30% NaOH, by above-mentioned total mol ratio formaldehyde/urea=1: 1, gradation adds urea, earlier when low temperature, carry out addition reaction under the weak basic condition, be warming up to 85-90 ℃ then and under the PH=5.0 condition, carry out polycondensation reaction, the about 2.5h of polymerization reaction time, to reacting viscosity is 40-60 centipoise (25 ℃), transfer PH=8.0, be cooled to 35 ℃, under the PH=8.0 condition, store.
The mixed method of (3) two kinds of resin glues:
Before use with above-mentioned two kinds of resins, the mixed proportion that is melamino-formaldehyde tree/Lauxite=2: 1 evenly mixes under 25-35 ℃ of condition, the advantage of this mixed glue is to make two kinds of resins obtain sufficient addition and polymerization respectively under specific separately addition, polycondensation condition, easy and safe to operate, can improve water resistance, the glue-joint strength of resin and the stability of using and storing.
(4) plate manufacture craft process: after adhesive completes, making principle and manufacture craft according to common high density fiberboard, after timber made wood chip with wood chipping equipment, by carrying out boiling, defibrator process, wood chip is ground into fiber, adopt dry preceding glue applying method, on the pipeline of fiber ejection, apply melamine resin and the Lauxite mixed glue and the curing agent (NH of the moistureproof usefulness of above-mentioned height
4)
2SO
4, paraffin water repellent, resin added is a bone dry fiber 12%, the applying wax amount is 1.5% of a bone dry fiber, after the drying system drying, the moulding of mating formation, the density of mating formation that adjust to be fit to is pressed into thickness 8-12mm density 900kg/m through hot press again
3High density fiberboard.
Produce and experimental test data: according to international standard ISO/DIS-16895-2, high moistureproof high density fiberboard can adopt the wet round-robin method of one of option when detecting, by following step check, that is: (1) tests test specimen at 20 ± 2 ℃ with 50mm * 50mm earlier, 65 ± 5 ℃ of conditions of relative humidity placement of following time constant mass is tested test specimen length, width and test specimen central point thickness then; (2) test specimen is immersed PH=7 ± 1, soaked 72 ± 1 hours in the tank that temperature is 20 ± 2 ℃, allow test specimen perpendicular to the water surface, and the water surface is higher than test specimen; (3) take out test specimen and wipe away dried test specimen surface attached water, test specimen vertically is placed in-16 ± 4 ℃ the refrigerator-freezer, and test specimen is spaced from each other certain distance, freezing 24 ± 0.25h; (4) freezing back test specimen is put into 70 ± 2 ℃ interior the oven dry 72 ± 1 hours of drying box immediately; A complete test needs 168h approximately, and triplicate promptly needs about 504 hours again.Each test back test specimen should be at 20 ± 2 ℃, when 65 ± 5 ℃ of conditions of relative humidity following times is placed to constant mass, then thickness swelling rate and internal bond strength measured.
Standard-required and actual result test result such as following table (plate thickness: 8-12mm):
Detect this preparation method of proof and meet and be better than international standard.
Embodiment 2:
The preparation method of the high density fiberboard of this height protection against the tide is made earlier melamine resin and Lauxite respectively:
(1) moistureproof melamine resin preparation method
In reactor, transfer formalin to PH=9.0 with 30% NaOH, according to formaldehyde and melamine is that 1.8: 1 amount joins melamine in the formalin according to mol ratio, carry out polycondensation reaction at 80-90 ℃, the about 2.0h of polymerization reaction time, to reacting viscosity is 40-55 centipoise (25 ℃), be cooled to 35 ℃, under the PH=9.0 condition, store.
(2) Lauxite preparation method:
In reactor, transfer formalin to PH=7.5 with 30% NaOH, by above-mentioned total mol ratio formaldehyde/urea=1: 1, gradation adds urea, earlier when low temperature, carry out addition reaction under the weak basic condition, be warming up to 85-90 ℃ then and under the PH=4.5 condition, carry out polycondensation reaction, the about 3.0h of polymerization reaction time, to reacting viscosity is 40-60 centipoise (25 ℃), transfer PH=7.5, be cooled to 35 ℃, under the PH=7.5 condition, store.
The mixed method of (3) two kinds of resin glues:
Before use with above-mentioned two kinds of resins, the mixed proportion that is melamino-formaldehyde tree/Lauxite=1: 1 evenly mixes under 25-35 ℃ of condition, the advantage of this mixed glue is to make two kinds of resins obtain sufficient addition and polymerization respectively under specific separately addition, polycondensation condition, easy and safe to operate, can improve water resistance, the glue-joint strength of resin and the stability of using and storing.
(4) plate manufacture craft process: after adhesive completes, making principle and manufacture craft according to common high density fiberboard, after timber made wood chip with wood chipping equipment, by carrying out boiling, defibrator process, wood chip is ground into fiber, adopt dry preceding glue applying method, on the pipeline of fiber ejection, apply melamine resin and the Lauxite mixed glue and the curing agent (NH of the moistureproof usefulness of above-mentioned height
4)
2SO
4, paraffin water repellent, resin added is a bone dry fiber 10%, the applying wax amount is 1.2% of a bone dry fiber, after the drying system drying, the moulding of mating formation, the density of mating formation that adjust to be fit to is pressed into thickness 8-12mm density 850kg/m through hot press again
3High density fiberboard.
Produce and experimental test data: according to international standard ISO/DIS-16895-2, high moistureproof high density fiberboard can adopt the wet round-robin method of one of option when detecting, by following step check, that is: (1) tests test specimen at 20 ± 2 ℃ with 50mm * 50mm earlier, 65 ± 5 ℃ of conditions of relative humidity placement of following time constant mass is tested test specimen length, width and test specimen central point thickness then; (2) test specimen is immersed PH=7 ± 1, soaked 72 ± 1 hours in the tank that temperature is 20 ± 2 ℃, allow test specimen perpendicular to the water surface, and the water surface is higher than test specimen; (3) take out test specimen and wipe away dried test specimen surface attached water, test specimen vertically is placed in-16 ± 4 ℃ the refrigerator-freezer, and test specimen is spaced from each other certain distance, freezing 24 ± 0.25h; (4) freezing back test specimen is put into 70 ± 2 ℃ interior the oven dry 72 ± 1 hours of drying box immediately; A complete test needs 168h approximately, and triplicate promptly needs about 504 hours again.Each test back test specimen should be at 20 ± 2 ℃, when 65 ± 5 ℃ of conditions of relative humidity following times is placed to constant mass, then thickness swelling rate and internal bond strength measured.
Standard-required and actual result test result such as following table (plate thickness: 8-12mm):
Detect this preparation method of proof and meet and be better than international standard.
Claims (8)
1, a kind of preparation method of high density fiberboard of high protection against the tide is characterized in that making melamine resin and Lauxite respectively earlier, carries out the mixed glue that is mixed into of melamine resin and Lauxite then before use; Woodchip is machined to wood chip, wood chip carries out boiling earlier, wood-fibred is made by the defibrator defibrator process in the back, the melamine resin and the Lauxite mixed glue that in the fiber ejection pipeline of defibrator, wood-fibred are applied curing agent, paraffin water repellent and uses preceding preparation, after drying, the moulding of mating formation, the adjustment density of mating formation is again through the hot press pressing plate.
2, the preparation method of the high density fiberboard of a kind of high protection against the tide according to claim 1 is characterized in that melamine resin is is that 1.70-2.30 carries out polycondensation reaction and makes by formaldehyde and melamine according to mol ratio.
3, the preparation method of the high density fiberboard of a kind of high protection against the tide according to claim 1 and 2, the preparation process that it is characterized in that melamine resin is to transfer formalin to PH=8.5-9.0 with 30% sodium hydroxide solution in reactor, add melamine, carry out polycondensation reaction at 80 ℃-90 ℃, polymerization reaction time 1-2h, be cooled to 35 ℃, transfer PH=8.5-9.0 to obtain.
4, the preparation method of the high density fiberboard of a kind of high protection against the tide according to claim 1 is characterized in that Lauxite is is that 0.80-1.30 carries out polycondensation reaction and makes by formaldehyde and urea according to mol ratio.
5, according to the preparation method of the high density fiberboard of claim 1 or 4 described a kind of high protection against the tide, the preparation process that it is characterized in that Lauxite is to transfer formalin to PH=7.5 with 30% NaOH, gradation adds urea in formalin, when low temperature, carry out earlier addition reaction under the weak basic condition, be warming up to 85 ℃-90 ℃ then and under the PH=4.5-5.5 condition, carry out polycondensation reaction, the about 2.0-3.0h of polymerization reaction time, to reacting viscosity is 40-60 centipoise (25 ℃), transfer PH=7.5-8.0, be cooled to 35 ℃, under the PH=7.5-8.0 condition, store.
6, the preparation method of the high density fiberboard of a kind of high protection against the tide according to claim 1, the mixed method that it is characterized in that melamine resin and Lauxite are that melamine resin and the Lauxite that will prepare are 0.40-4 according to mol ratio: 1 proportion evenly mixes under 25 ℃ of-35 ℃ of conditions and makes.
7, the preparation method of the high density fiberboard of a kind of high protection against the tide according to claim 1, the addition that it is characterized in that melamine resin and Lauxite mixed glue is the 10%-15% of over dry wood-fibred weight.
8, the preparation method of the high density fiberboard of a kind of high protection against the tide according to claim 1, the addition that it is characterized in that paraffin water repellent is the 1.0%-2.0% of over dry wood-fibred weight.
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| CN2009100147787A CN101549519B (en) | 2009-03-10 | 2009-03-10 | Manufacturing method of high-moisture-proof and high-density fiber board |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102152372A (en) * | 2011-01-18 | 2011-08-17 | 福建省永安林业(集团)股份有限公司 | Preparation method of low-density fiberboards |
| CN102731963A (en) * | 2011-04-14 | 2012-10-17 | 圣象（江苏）木业研究有限公司 | Mixed type impregnating resin and its preparation method |
| CN103265921A (en) * | 2012-12-31 | 2013-08-28 | 浙江帝龙新材料股份有限公司 | High-gloss anti-crack adhesive for multilayer plywood and method for manufacturing multilayer plywood |
| CN103666348A (en) * | 2013-11-28 | 2014-03-26 | 广西三威林产工业有限公司 | Highly-dampproof adhesive and preparation method thereof |
| CN103878859A (en) * | 2014-03-05 | 2014-06-25 | 东营正和木业有限公司 | Method for preparing highly-damp-proof thin type medium density fiberboard |
| CN104059598A (en) * | 2014-06-19 | 2014-09-24 | 东营人造板厂 | Method for manufacturing soybean protein modified adhesive formaldehyde-free medium-density fiberboard |
| CN106243623A (en) * | 2016-08-12 | 2016-12-21 | 广东广纤竹业有限公司 | A kind of well lid and production method |
| CN107009479A (en) * | 2017-04-05 | 2017-08-04 | 云浮市贞英木业有限公司 | A kind of preparation method of high density fiberboard |
| WO2020000583A1 (en) * | 2018-06-26 | 2020-01-02 | 江苏吉福新材料股份有限公司 | Lipid adhesive and manufacturing method therefor |
| CN113601630A (en) * | 2021-08-17 | 2021-11-05 | 贵州省林业科学研究院 | Oil tea based particle board and preparation method thereof |
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- 2009-03-10 CN CN2009100147787A patent/CN101549519B/en active Active
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102152372A (en) * | 2011-01-18 | 2011-08-17 | 福建省永安林业(集团)股份有限公司 | Preparation method of low-density fiberboards |
| CN102731963B (en) * | 2011-04-14 | 2014-11-26 | 圣象实业（江苏）有限公司 | Mixed type impregnating resin and its preparation method |
| CN102731963A (en) * | 2011-04-14 | 2012-10-17 | 圣象（江苏）木业研究有限公司 | Mixed type impregnating resin and its preparation method |
| CN103265921A (en) * | 2012-12-31 | 2013-08-28 | 浙江帝龙新材料股份有限公司 | High-gloss anti-crack adhesive for multilayer plywood and method for manufacturing multilayer plywood |
| CN103666348A (en) * | 2013-11-28 | 2014-03-26 | 广西三威林产工业有限公司 | Highly-dampproof adhesive and preparation method thereof |
| CN103666348B (en) * | 2013-11-28 | 2015-03-11 | 广西三威林产工业有限公司 | Highly-dampproof adhesive and preparation method thereof |
| CN103878859A (en) * | 2014-03-05 | 2014-06-25 | 东营正和木业有限公司 | Method for preparing highly-damp-proof thin type medium density fiberboard |
| CN103878859B (en) * | 2014-03-05 | 2016-04-20 | 东营正和木业有限公司 | The preparation method of the slim medium density fibre board (MDF) of a kind of high protection against the tide |
| CN104059598A (en) * | 2014-06-19 | 2014-09-24 | 东营人造板厂 | Method for manufacturing soybean protein modified adhesive formaldehyde-free medium-density fiberboard |
| CN106243623A (en) * | 2016-08-12 | 2016-12-21 | 广东广纤竹业有限公司 | A kind of well lid and production method |
| CN107009479A (en) * | 2017-04-05 | 2017-08-04 | 云浮市贞英木业有限公司 | A kind of preparation method of high density fiberboard |
| WO2020000583A1 (en) * | 2018-06-26 | 2020-01-02 | 江苏吉福新材料股份有限公司 | Lipid adhesive and manufacturing method therefor |
| CN113601630A (en) * | 2021-08-17 | 2021-11-05 | 贵州省林业科学研究院 | Oil tea based particle board and preparation method thereof |
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| CN101549519B (en) | 2010-12-29 |
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