CN109895213B - Anti-mildew density board with decorative film and preparation method thereof - Google Patents
Anti-mildew density board with decorative film and preparation method thereof Download PDFInfo
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Abstract
The invention discloses an anti-mildew density board with an attached decorative film and a preparation method thereof, wherein the density board comprises a density board and a decorative film, the decorative film is attached to the surface of the density board, the thickness of the decorative film is 0.05-0.07mm, and the thickness of the density board is 0.5-1.8 cm; the density board comprises the following components: wheat straw, bamboo and wood chips; the decorative film comprises the following components: resin, polyester polyol, acetone, zinc stearate, nano calcium carbonate, ammonium polyphosphate, soybean oil, sodium dodecyl benzene sulfonate, toluene diisocyanate, ethyl acetate, trimethylolpropane, diethylene glycol dibenzoate and a defoaming agent; the raw material of the anti-mildew density board with the decorative film has better anti-mildew performance after pretreatment, and in addition, the flame retardant material is added into the decorative film, and the formaldehyde content is low, so the board has high safety.
Description
Technical Field
The invention belongs to the technical field of environment-friendly materials, and particularly relates to an anti-mildew density plate with an attached decorative film and a preparation method thereof.
Background
The decorative board comprises a laminated wood board, a plywood, a decorative panel, a density board, an integrated material, a shaving board, a fireproof board, a gypsum board, a PVC board, an aluminum gusset plate, an aluminum plastic board, a three-dimensional board and the like. Wherein the density board is divided into medium density fiberboard (medium density board) and hard fiberboard (high density board), etc., and the density is 450-800 kg/m3Is medium density fiberboard with the density of 800kg/m3Above is a hardboard. The density board is made of plant wood fiber as main raw materialThe density board is prepared by the working procedures of hot grinding, paving, hot press molding and the like, however, the main raw material of the density board is plant wood fiber, so the prepared finished product is difficult to avoid and easy to mildew.
In a plurality of decorative plates, the existence of formaldehyde cannot be avoided, but in 2017, 10 and 27 days, the list of carcinogens published by the international cancer research institution of the world health organization puts the formaldehyde in a list of carcinogens, and the formaldehyde has great harm to the health of human bodies.
Formaldehyde of the formula HCHO or CH2O, molecular weight 30.03, also known as formil. Colorless and has stimulating effect on eyes and nose. Gas relative density 1.067 (air = 1) and liquid density 0.815g/cm (20 ℃). Melting point-92 deg.C, boiling point-19.5 deg.C. Is easily soluble in water and ethanol. The aqueous solution, having a concentration of up to 55%, usually 40%, is known as formalin (formalin), which is a colorless liquid with an irritating odor and is highly reducing, especially in alkaline solutions. Can be combusted, and the steam and air form explosive mixture with explosion limit of 7-73% (volume). The ignition point is about 300 ℃. Can be prepared by dehydrogenation or oxidation of methanol under the catalysis of metals such as silver, copper and the like, and can also be separated from hydrocarbon oxidation products. Can be used as raw materials of phenolic resin, urea-formaldehyde resin, vinylon, urotropine, pentaerythritol, dye, pesticide, disinfectant and the like.
Therefore, the reduction of formaldehyde content in the decorative material is a problem to be solved urgently, and in addition, the problem of mildew resistance of the density board is also needed to be solved because the density board is corroded and mildewed due to the nature of the raw material of the density board.
Disclosure of Invention
The invention provides an anti-mildew density plate with a decorative film and a preparation method thereof, and aims to solve the problems that the plate is easy to mildew and has high formaldehyde content in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
the mildew-proof density board with the attached decorative film comprises a density board and the decorative film, wherein the decorative film is attached to the surface of the density board, the thickness of the decorative film is 0.05-0.07mm, and the thickness of the density board is 0.5-1.8 cm.
Further, the density board comprises the following components in parts by weight: 80-100 parts of wheat straw, 30-50 parts of bamboo and 20-50 parts of wood chips.
Further, the decorative film comprises the following components in parts by weight: 60-70 parts of resin, 20-30 parts of polyester polyol, 10-20 parts of acetone, 5-10 parts of zinc stearate, 5-10 parts of nano calcium carbonate, 1-3 parts of ammonium polyphosphate, 1-3 parts of soybean oil, 1-3 parts of sodium dodecyl benzene sulfonate, 0.5-1 part of toluene diisocyanate, 0.1-0.2 part of ethyl acetate, 0.05-0.1 part of trimethylolpropane, 3-4 parts of diethylene glycol dibenzoate and 1-2 parts of defoaming agent.
A preparation method of the mildew-proof density plate with the decorative film comprises the following steps:
step 1, preparing a density board, which comprises the following steps:
step 11, cutting the wheat straws and the bamboos into sections of 1-3cm, putting the sections into a crusher, crushing the sections into coarse particles with the particle size of 0.5-1mm, and sieving the coarse particles;
step 12, steaming the coarse particles and the sawdust together in hot steam for 3-5min, and drying at the temperature of 130-150 ℃ until the water content is 30-50%
Step 13, mixing the dried coarse particles with the wood chips, putting the mixture into a grinder to be ground into fine particles with the particle size of 0.1-0.3mm, and sieving the fine particles;
step 14, placing the screened substance obtained in the step 13 in a mixed solution of sodium hydroxide and sodium resinate for standing for 0.5 to 1 hour, filtering to remove excessive water to obtain a product A,
step 15, adding urea-formaldehyde resin with the mass of 1% of that of the product A into the product A, wherein the molar ratio of urea to formaldehyde in the urea-formaldehyde resin is 1: 0.05;
step 16, placing the mixture obtained in the step 15 in a mold, and stabilizing the pressure for 3-10min under the pressure of 20-200MPa to obtain a density board;
step 2, preparing decorative film liquid, comprising the following steps:
step 21, adding resin, polyester polyol, zinc stearate, nano calcium carbonate, ammonium polyphosphate, soybean oil and sodium dodecyl benzene sulfonate into a reaction kettle added with acetone according to the proportion, stirring for 10-20min at 30-50 revolutions/min, heating to 50-60 ℃ at the heating rate of 8-10 ℃/min, adding toluene diisocyanate and ethyl acetate, stirring for 3-5s at 30-50 revolutions/min, then dropwise adding trimethylolpropane at the speed of 5 drops/s, heating to 70-80 ℃ at the heating rate of 8-10 ℃/min, keeping the temperature for 30-60s, adding diethylene glycol dibenzoate and an antifoaming agent, keeping the temperature at 70-80 ℃, stirring for 30-50min at 10-20 revolutions/min, naturally cooling to room temperature, obtaining decorative film liquid;
step 3, attaching the decorative film to the surface of the density board: and (3) uniformly spraying the decorative film liquid obtained in the step (2) on the surface of the density board for 3-5 times.
Further, before the step 1, a density board raw material pretreatment is carried out, and the method comprises the following steps:
step i, preparing immersion liquid, taking Cu (OH)21-3g、HF2-5ml、H2O2Sequentially adding 10-20ml of 75% ethanol and 10-20ml of water into 100ml of water, and uniformly stirring;
step ii, placing the wheat straws and the bamboos in the steeping liquor, heating to 60 ℃ at the speed of 1-3 ℃/min, keeping for 10-20min, then adding the wood chips, stirring uniformly, heating to 60 ℃ at the speed of 1-3 ℃/min, keeping for 5-10min,
step iii, taking out the wheat straws, the bamboos and the wood chips, placing the mixture in an environment with the temperature of 100-,
and (iii) naturally cooling the wheat straws, the bamboos and the wood chips to room temperature for later use.
Further, in the step 14, the mass ratio of the sodium hydroxide to the sodium resinate is 1:1, and the concentration of the mixed solution is 1%.
Further, in the step 2, the spraying interval is 10-30min each time.
Compared with the prior art, the invention has the following beneficial effects:
the raw material of the anti-mildew density board with the decorative film has better anti-mildew performance after pretreatment, and in addition, the flame retardant material is added into the decorative film, and the formaldehyde content is low, so the board has high safety.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
The mildew-proof density board with the decoration film attached comprises a density board and a decoration film, wherein the decoration film is attached to the surface of the density board, the thickness of the decoration film is 0.05mm, and the thickness of the density board is 0.5 cm.
The density board comprises the following components in parts by weight: 80 parts of wheat straw, 30 parts of bamboo and 20 parts of wood chips.
The decorative film comprises the following components in parts by mass: 60 parts of resin, 20 parts of polyester polyol, 100 parts of acetone, 5 parts of zinc stearate, 5 parts of nano calcium carbonate, 1 part of ammonium polyphosphate, 1 part of soybean oil, 1 part of sodium dodecyl benzene sulfonate, 0.5 part of toluene diisocyanate, 0.1 part of ethyl acetate, 0.05 part of trimethylolpropane, 3 parts of diethylene glycol dibenzoate and 1 part of defoaming agent.
A preparation method of the mildew-proof density plate with the decorative film comprises the following steps:
before step 1, performing density board raw material pretreatment, comprising the following steps:
step i, preparing immersion liquid, taking Cu (OH)21g、HF2ml、H2O2Sequentially adding 10ml of 75% ethanol and 10ml of water into 100ml of water, and uniformly stirring;
step ii, placing the wheat straws and the bamboos in the steeping liquor, heating to 60 ℃ at the speed of 1 ℃/min, keeping for 10min, then adding the wood chips, stirring uniformly, heating to 60 ℃ at the speed of 1 ℃/min, keeping for 5min,
step iii, taking out the wheat straws, the bamboos and the wood chips, placing the mixture in an environment with the temperature of 100 ℃ for 2min, heating the mixture to 150 ℃ at the heating rate of 8 ℃/min, keeping the temperature for 1h,
and (iii) naturally cooling the wheat straws, the bamboos and the wood chips to room temperature for later use.
Step 1, preparing a density board, which comprises the following steps:
step 11, cutting the wheat straws and the bamboos into sections of 1cm, putting the sections into a crusher, crushing the sections into coarse particles with the particle size of 0.5mm, and sieving the coarse particles;
step 12, putting the coarse particles and the sawdust into hot steam to steam for 3min, and drying at the temperature of 130 ℃ until the water content is 30-50%;
step 13, mixing the dried coarse particles with the wood chips, putting the mixture into a grinder to be ground into fine particles with the particle size of 0.1mm, and sieving the fine particles;
step 14, placing the screened material obtained in the step 13 in a mixed solution of sodium hydroxide and sodium resinate for standing for 0.5h, and filtering to remove excessive water to obtain a product A, wherein the mass ratio of the sodium hydroxide to the sodium resinate is 1:1, and the concentration of the mixed solution is 1%;
step 15, adding urea-formaldehyde resin with the mass of 1% of that of the product A into the product A, wherein the molar ratio of urea to formaldehyde in the urea-formaldehyde resin is 1: 0.05;
step 16, placing the mixture obtained in the step 15 in a mold, and stabilizing the pressure for 3min under the pressure of 20MPa to obtain a density board;
step 2, preparing decorative film liquid, comprising the following steps:
step 21, adding resin, polyester polyol, zinc stearate, nano calcium carbonate, ammonium polyphosphate, soybean oil and sodium dodecyl benzene sulfonate into a reaction kettle added with acetone according to the proportion, stirring for 10min at 30 revolutions per minute, heating to 50 ℃ at the heating speed of 8 ℃/min, adding toluene diisocyanate and ethyl acetate, stirring for 3s at 30 revolutions per minute, dropwise adding trimethylolpropane at the speed of 5 drops per second, heating to 70 ℃ at the heating speed of 8 ℃/min, keeping for 30s, adding diethylene glycol dibenzoate and a defoaming agent, keeping the temperature at 70 ℃, stirring for 30min at 10 revolutions per minute, and naturally cooling to room temperature to obtain a decorative film liquid;
step 3, attaching the decorative film to the surface of the density board: and (3) uniformly spraying the decorative film liquid obtained in the step (2) on the surface of the density board, wherein the spraying interval is 10min each time.
Example 2
The mildew-proof density board with the decoration film attached comprises a density board and the decoration film, wherein the decoration film is attached to the surface of the density board, the thickness of the decoration film is 0.07mm, and the thickness of the density board is 1.8 cm.
The density board comprises the following components in parts by weight: 100 parts of wheat straw, 50 parts of bamboo and 50 parts of wood chips.
The decorative film comprises the following components in parts by mass: 70 parts of resin, 30 parts of polyester polyol, 20 parts of acetone, 10 parts of zinc stearate, 10 parts of nano calcium carbonate, 3 parts of ammonium polyphosphate, 3 parts of soybean oil, 3 parts of sodium dodecyl benzene sulfonate, 1 part of toluene diisocyanate, 0.2 part of ethyl acetate, 0.1 part of trimethylolpropane, 4 parts of diethylene glycol dibenzoate and 2 parts of defoaming agent.
A preparation method of the mildew-proof density plate with the decorative film comprises the following steps:
before step 1, performing density board raw material pretreatment, comprising the following steps:
step i, preparing immersion liquid, taking Cu (OH)23g、HF5ml、H2O2Sequentially adding 20ml of 75% ethanol and 20ml of water into 100ml of water, and uniformly stirring;
step ii, placing the wheat straws and the bamboos in the steeping liquor, heating to 60 ℃ at the speed of 13 ℃/min, keeping for 20min, then adding the wood chips, stirring uniformly, heating to 60 ℃ at the speed of 3 ℃/min, keeping for 10min,
step iii, taking out the wheat straws, the bamboos and the wood chips, placing the mixture in an environment with the temperature of 120 ℃ for 5min, heating the mixture to 180 ℃ at the heating rate of 10 ℃/min, keeping the temperature for 2h,
and (iii) naturally cooling the wheat straws, the bamboos and the wood chips to room temperature for later use.
Step 1, preparing a density board, which comprises the following steps:
step 11, cutting the wheat straws and the bamboos into sections of 3cm, putting the sections into a crusher, crushing the sections into coarse particles with the particle size of 1mm, and sieving the coarse particles;
12, putting the coarse particles and the sawdust into hot steam to steam for 5min, and drying at the temperature of 150 ℃ until the water content is 50%;
step 13, mixing the dried coarse particles with the wood chips, putting the mixture into a grinder to be ground into fine particles with the particle size of 0.3mm, and sieving the fine particles;
step 14, placing the screened material obtained in the step 13 in a mixed solution of sodium hydroxide and sodium resinate for standing for 1 hour, and filtering to remove excessive water to obtain a product A, wherein the mass ratio of the sodium hydroxide to the sodium resinate is 1:1, and the concentration of the mixed solution is 1%;
step 15, adding urea-formaldehyde resin with the mass of 1% of that of the product A into the product A, wherein the molar ratio of urea to formaldehyde in the urea-formaldehyde resin is 1: 0.05;
step 16, placing the mixture obtained in the step 15 in a mold, and stabilizing the pressure for 10min under the pressure of 200MPa to obtain a density board;
step 2, preparing decorative film liquid, comprising the following steps:
step 21, adding resin, polyester polyol, zinc stearate, nano calcium carbonate, ammonium polyphosphate, soybean oil and sodium dodecyl benzene sulfonate into a reaction kettle added with acetone according to the proportion, stirring for 20min at 50 revolutions per minute, heating to 60 ℃ at the heating speed of 10 ℃/min, adding toluene diisocyanate and ethyl acetate, stirring for 5s at 50 revolutions per minute, dropwise adding trimethylolpropane at the speed of 5 drops per second, heating to 80 ℃ at the heating speed of 10 ℃/min, keeping for 60s, adding diethylene glycol dibenzoate and a defoaming agent, keeping the temperature at 80 ℃, stirring for 50min at 20 revolutions per minute, and naturally cooling to room temperature to obtain a decorative film liquid;
step 3, attaching the decorative film to the surface of the density board: and (3) uniformly spraying the decorative film liquid obtained in the step (2) on the surface of the density board for 5 times, wherein the spraying interval is 30min each time.
Example 3
The mildew-proof density board with the decorative film attached comprises a density board and the decorative film, wherein the decorative film is attached to the surface of the density board, the thickness of the decorative film is 0.06mm, and the thickness of the density board is 1.0 cm.
The density board comprises the following components in parts by weight: 90 parts of wheat straw, 40 parts of bamboo and 30 parts of wood chips.
The decorative film comprises the following components in parts by mass: 65 parts of resin, 25 parts of polyester polyol, 15 parts of acetone, 8 parts of zinc stearate, 8 parts of nano calcium carbonate, 2 parts of ammonium polyphosphate, 2 parts of soybean oil, 2 parts of sodium dodecyl benzene sulfonate, 0.8 part of toluene diisocyanate, 0.15 part of ethyl acetate, 0.08 part of trimethylolpropane, 3.5 parts of diethylene glycol dibenzoate and 1.5 parts of defoaming agent.
A preparation method of the mildew-proof density plate with the decorative film comprises the following steps:
before step 1, performing density board raw material pretreatment, comprising the following steps:
step i, preparing immersion liquid, taking Cu (OH)22g、HF3ml、H2O2Adding 15ml of 75% ethanol and 15ml of water into 100ml in sequence, and stirring uniformly;
step ii, placing the wheat straws and the bamboos in the steeping liquor, heating to 60 ℃ at the speed of 2 ℃/min, keeping for 15min, then adding the wood chips, stirring uniformly, heating to 60 ℃ at the speed of 2 ℃/min, keeping for 8min,
step iii, taking out the wheat straws, the bamboos and the wood chips, placing the mixture in an environment with the temperature of 110 ℃ for 2-5min, heating the mixture to 160 ℃ at the heating rate of 9 ℃/min, keeping the temperature for 1.5h,
and (iii) naturally cooling the wheat straws, the bamboos and the wood chips to room temperature for later use.
Step 1, preparing a density board, which comprises the following steps:
step 11, cutting the wheat straws and the bamboos into sections of 2cm, putting the sections into a crusher, crushing the sections into coarse particles with the particle size of 0.8mm, and sieving the coarse particles;
12, putting the coarse particles and the sawdust into hot steam to steam for 4min, and drying at the temperature of 140 ℃ until the water content is 40%;
step 13, mixing the dried coarse particles with the wood chips, putting the mixture into a grinder to be ground into fine particles with the particle size of 0.2mm, and sieving the fine particles;
step 14, placing the screened material obtained in the step 13 in a mixed solution of sodium hydroxide and sodium resinate for standing for 0.8h, and filtering to remove excessive water to obtain a product A, wherein the mass ratio of the sodium hydroxide to the sodium resinate is 1:1, and the concentration of the mixed solution is 1%;
step 15, adding urea-formaldehyde resin with the mass of 1% of that of the product A into the product A, wherein the molar ratio of urea to formaldehyde in the urea-formaldehyde resin is 1: 0.05;
step 16, placing the mixture obtained in the step 15 in a mold, and stabilizing the pressure for 5min under the pressure of 100MPa to obtain a density board;
step 2, preparing decorative film liquid, comprising the following steps:
step 21, adding resin, polyester polyol, zinc stearate, nano calcium carbonate, ammonium polyphosphate, soybean oil and sodium dodecyl benzene sulfonate into a reaction kettle added with acetone according to the proportion, stirring for 15min at 40 revolutions per minute, heating to 55 ℃ at the heating speed of 9 ℃/min, adding toluene diisocyanate and ethyl acetate, stirring for 4s at 40 revolutions per minute, dropwise adding trimethylolpropane at the speed of 5 drops per second, heating to 75 ℃ at the heating speed of 9 ℃/min, keeping for 50s, adding diethylene glycol dibenzoate and a defoaming agent, keeping the temperature at 75 ℃, stirring for 40min at 15 revolutions per minute, and naturally cooling to room temperature to obtain a decorative film liquid;
step 3, attaching the decorative film to the surface of the density board: and (3) uniformly spraying the decorative film liquid obtained in the step (2) on the surface of the density board for 4 times, wherein the spraying interval is 20min each time.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (3)
1. A preparation method of an anti-mildew density plate with an attached decorative film is characterized in that,
the density board comprises a density board and a decorative film, wherein the decorative film is attached to the surface of the density board, the thickness of the decorative film is 0.05-0.07mm, and the thickness of the density board is 0.5-1.8 cm;
the density board comprises the following components in parts by weight: 80-100 parts of wheat straw, 30-50 parts of bamboo and 20-50 parts of wood chips;
the decorative film comprises the following components in parts by mass: 60-70 parts of resin, 20-30 parts of polyester polyol, 10-20 parts of acetone, 5-10 parts of zinc stearate, 5-10 parts of nano calcium carbonate, 1-3 parts of ammonium polyphosphate, 1-3 parts of soybean oil, 1-3 parts of sodium dodecyl benzene sulfonate, 0.5-1 part of toluene diisocyanate, 0.1-0.2 part of ethyl acetate, 0.05-0.1 part of trimethylolpropane, 3-4 parts of diethylene glycol dibenzoate and 1-2 parts of defoaming agent;
the preparation method of the density plate comprises the following steps:
step 1, preparing a density board, which comprises the following steps:
step 11, cutting the wheat straws and the bamboos into sections of 1-3cm, putting the sections into a crusher, crushing the sections into coarse particles with the particle size of 0.5-1mm, and sieving the coarse particles;
12, putting the coarse particles and the sawdust into hot steam for steaming for 3-5min, and drying at the temperature of 130-150 ℃ until the water content is 30-50%;
step 13, mixing the dried coarse particles with the wood chips, putting the mixture into a grinder to be ground into fine particles with the particle size of 0.1-0.3mm, and sieving the fine particles;
step 14, placing the screened substance obtained in the step 13 in a mixed solution of sodium hydroxide and sodium resinate for standing for 0.5 to 1 hour, and filtering to remove excessive water to obtain a product A;
step 15, adding urea-formaldehyde resin with the mass of 1% of that of the product A into the product A, wherein the molar ratio of urea to formaldehyde in the urea-formaldehyde resin is 1: 0.05;
step 16, placing the mixture obtained in the step 15 in a mold, and stabilizing the pressure for 3-10min under the pressure of 20-200MPa to obtain a density board;
step 2, preparing decorative film liquid, comprising the following steps:
step 21, adding resin, polyester polyol, zinc stearate, nano calcium carbonate, ammonium polyphosphate, soybean oil and sodium dodecyl benzene sulfonate into a reaction kettle added with acetone according to the proportion, stirring for 10-20min at 30-50 revolutions/min, heating to 50-60 ℃ at the heating rate of 8-10 ℃/min, adding toluene diisocyanate and ethyl acetate, stirring for 3-5s at 30-50 revolutions/min, then dropwise adding trimethylolpropane at the speed of 5 drops/s, heating to 70-80 ℃ at the heating rate of 8-10 ℃/min, keeping the temperature for 30-60s, adding diethylene glycol dibenzoate and an antifoaming agent, keeping the temperature at 70-80 ℃, stirring for 30-50min at 10-20 revolutions/min, naturally cooling to room temperature, obtaining decorative film liquid;
step 3, attaching the decorative film to the surface of the density board: uniformly spraying the decorative film liquid obtained in the step 2 on the surface of the density board for 3-5 times;
before the step 1, the density board raw material pretreatment is carried out, and the method comprises the following steps:
step i, preparing immersion liquid, taking Cu (OH)21-3g、HF2-5ml、H2O2Sequentially adding 10-20ml of 75% ethanol and 10-20ml of water into 100ml of water, and uniformly stirring;
step ii, placing the wheat straws and the bamboos in the steeping liquor, heating to 60 ℃ at the speed of 1-3 ℃/min, keeping for 10-20min, then adding the wood chips, stirring uniformly, heating to 60 ℃ at the speed of 1-3 ℃/min, and keeping for 5-10 min;
step iii, taking out the wheat straws, the bamboos and the wood chips, placing the wheat straws, the bamboos and the wood chips in an environment with the temperature of 100-;
and (iii) naturally cooling the wheat straws, the bamboos and the wood chips to room temperature for later use.
2. The method for preparing a density board with an anti-mildew attached decorative film as claimed in claim 1, wherein in the step 14, the mass ratio of the sodium hydroxide to the sodium resinate is 1:1, and the concentration of the mixed solution is 1%.
3. The method for preparing a mildew-resistant density plate with an attached decorative film as claimed in claim 1, wherein in the step 3, spraying is performed at intervals of 10-30 min.
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| CN109333745A (en) * | 2018-10-17 | 2019-02-15 | 合肥尚涵装饰工程有限公司 | A kind of preparation method of mould proof environmentally protective artificial board |
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