CN111377704A - Preparation method of flame-retardant shaving board - Google Patents
Preparation method of flame-retardant shaving board Download PDFInfo
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- CN111377704A CN111377704A CN202010281929.1A CN202010281929A CN111377704A CN 111377704 A CN111377704 A CN 111377704A CN 202010281929 A CN202010281929 A CN 202010281929A CN 111377704 A CN111377704 A CN 111377704A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/30—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing magnesium cements or similar cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/30—Nailable or sawable materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
A preparation method of a flame-retardant shaving board is characterized by comprising the following steps: the flame-retardant shaving board is formed by mixing wood fiber shavings and flame-retardant slurry according to the specific gravity of 1:6-8 to form mixed slurry, spreading the slurry, rolling, curing and maintaining; the flame-retardant slurry is prepared by taking magnesium oxide, magnesium sulfate and water as reaction raw materials, citric acid monohydrate, sodium citrate and calcium stearate as modification aids and bentonite, fly ash and talcum powder as fillers. The flame-retardant shaving board prepared by the invention is safe and environment-friendly, no binder is additionally used, the formaldehyde emission is as low as 0.07ml/L, and the E0 level is reached; the fireproof performance reaches A1 level, and deformation does not occur at the flame temperature of 1000 ℃; the mechanical strength is high, the breaking strength reaches more than 45MPa, and the bearing capacity can reach 13000 KN; the water-proof and corrosion-resistant composite shaving board has excellent water-proof capability and corrosion-resistant capability, and the service life of the natural shaving board is prolonged.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a preparation method of a flame-retardant shaving board.
Background
Particle board (Particle board), also called Particle board, bagasse board, is an artificial board made of wood or other wood cellulose material and glued under heat and pressure after adhesive is applied. It is mainly used for furniture manufacture, building industry and train and automobile carriage manufacture. The shaving board has uniform structure and good processing performance, can be processed into a large-width board as required, and is a good raw material for manufacturing furniture with different specifications and styles.
Along with the rapid development of Chinese economy, the living standard of people is increasingly improved, the requirements on the veneer particle board are also increasingly high, the existing particle board has low mechanical strength and is easy to break, and the service life of the particle board is shortened. In addition, with the wider application of the shaving board, the shaving board is easy to deform in a high-temperature and high-humidity environment, the flame retardant property is poor, the fireproof performance of most shaving boards can only reach B level, the shaving board is easy to burn, a fire hazard is caused, and serious potential safety hazards are brought to use places. Since formaldehyde-based adhesives are generally used in the production of particle boards, such as the adhesives used in CN108501165A, which are a mixture of phenol formaldehyde resin, urea formaldehyde resin and phenol formaldehyde melamine resin, the finished products will release more or less free formaldehyde, and when the content of free formaldehyde exceeds a certain limit, the health of human body will be affected. When the shaving board is used as a veneer, the shaving board has poor surface adhesion and is not easy to color.
Disclosure of Invention
Based on the technical problems, the invention aims to provide a preparation method of an environment-friendly flame-retardant shaving board with strong deformation resistance.
The purpose of the invention is realized by the following technical scheme:
a preparation method of a flame-retardant shaving board is characterized by comprising the following steps: the flame-retardant shaving board is prepared by mixing wood fiber shavings and flame-retardant slurry according to the specific gravity of 1:6-8 to form mixed slurry, spreading and rolling the mixed slurry, curing and maintaining, wherein the flame-retardant slurry is prepared by adding magnesium sulfate into water to prepare solution, then adding magnesium oxide, citric acid monohydrate, sodium citrate, calcium stearate and wood fiber wood shavings in sequence, stirring for 15-20min at the stirring speed of 80-100r/min, adding bentonite, fly ash and talcum powder, stirring to prepare slurry, stirring for 30-45min at the stirring speed of 120-160r/min, the talcum powder is a mixture of talcum powder A with the grain diameter D of 5.5-6.5 mu m and talcum powder B with the grain diameter of 10-12 mu m, wherein the talcum powder A and the talcum powder B have different thicknesses and comprise the following components in percentage by mass: talcum powder B is 2: 1-1.5; the curing and curing are that after the roller forming, the roller is cured for 7 to 12 hours under the conditions of 35 to 45 ℃ and 80 to 90 percent of humidity, the roller is demolded and then cured for 72 hours under the conditions of 30 to 40 ℃ and 65 to 70 percent of humidity, and then the roller is cured for 7 days at normal temperature.
The wood fiber shavings have an excellent framework supporting effect in the slurry, are completely wrapped by the rest components of the slurry, effectively prevent moisture absorption of the wood fiber shavings, are effectively combined with the slurry formula, have high integral plasticity, are effectively combined with the rest components, and do not have the phenomena of layering, pulverization and the like in the long-term use process.
In the curing process, the problem of large brittleness of the cured product is easy to occur, the problems are overcome by controlling crystallization through the ingredients and combining the specific curing and curing means, the toughness of the prepared product is improved, and the impact resistance is enhanced.
The talcum powder is a mixture of talcum powder A with the particle size D of 6 mu m and talcum powder B with the particle size of 12 mu m, wherein the talcum powder A and the talcum powder B have different thicknesses and comprise the following components in percentage by mass: and talcum powder B is 2:1.
The talcum powder is added into a system as a filling agent, so that the flame retardance of the material can be improved, the setting time of a crystal phase can be prolonged, but the talcum powder has a special rhombic sheet-shaped structure, the density of the material can be directly influenced, larger gaps can be formed by the stacking of particles, the density of the material is reduced, and the corrosion resistance and the deformation resistance of the material are influenced. The invention adopts the talcum powder with different thickness degrees as the filling material, realizes secondary filling, increases the material density, thereby reducing the shrinkage rate of the prepared material, simultaneously reduces the hydration heat, prevents high-temperature deformation and ensures the dimensional stability.
Furthermore, the particle size of the bentonite is 15-20 μm, and the particle size of the fly ash is 70-80 μm.
Furthermore, the raw materials comprise 100 parts of magnesium oxide, 55-60 parts of magnesium sulfate and 60-65 parts of water according to the specific gravity, and the reaction auxiliary agent comprises 0.8-1.6 parts of citric acid monohydrate, 0.5-1 part of sodium citrate and 0.5-2.8 parts of calcium stearate according to the specific gravity.
Further, the filling material added into the flame-retardant slurry comprises 5-10 parts of bentonite, 6-12 parts of fly ash and 9-14 parts of talcum powder by weight.
The magnesium oxide, magnesium sulfate and water are reacted to form a crystalline phase, and if the control is not good, the crystalline phase is condensed too fast, so that the internal stress of the plate is large, the distribution is not uniform, the stability is poor, and the final plate is easy to deform under the influence of the external environment. According to the invention, citric acid monohydrate, sodium citrate and talcum powder synergistically prolong the reaction crystallization and condensation time of magnesium oxide and magnesium sulfate, so that the excessive evaporation of water is avoided, and the stability and uniformity of a crystallization phase are improved, thereby improving the strength and corrosion resistance of the prepared shaving board assembly; the calcium stearate is added to improve the water resistance and the water resistance of the material, improve the softening coefficient of the material and reduce the overall deformation of the material after the material is contacted with external water.
Further, the colloidal slurry is subjected to radiation treatment for 6-8 hours by adopting Cs-137 at a stirring speed of 40r/min, so that the molecular structure of the slurry is changed, the toughness and tensile strength of the material are enhanced, and the surface cracking and pulverization of the material are inhibited.
Further, the slurry spreading and rolling is specifically to place low-alkali glass fiber grey cloth on two surfaces respectively, add the mixed slurry in the middle, and roll-press and form.
Most specifically, the preparation method of the flame-retardant shaving board is characterized by comprising the following steps of:
step (1): adding 55-60 parts of magnesium sulfate into 60-65 parts of water to prepare a solution, then sequentially adding 100 parts of magnesium oxide, 0.8-1.6 parts of citric acid monohydrate, 0.5-1 part of sodium citrate, 0.5-2.8 parts of calcium stearate and wood fiber shavings, stirring for 15-20min at the stirring speed of 80-100r/min, wherein the weight ratio of the wood fiber shavings to the total of all other components in the slurry is 1: 6-8;
step (2): then 5-10 parts of bentonite, 6-12 parts of fly ash and 9-14 parts of talcum powder are added and stirred to prepare mixed slurry, the stirring speed is 120-160r/min, and the stirring time is 30-45min to prepare colloidal mixed slurry, wherein the talcum powder is a mixture consisting of talcum powder A with the particle size D of 5.5-6.5 mu m and talcum powder B with the particle size of 10-12 mu m and the two talcum powders with different thicknesses, and the mass ratio of the components is talcum powder A: 1-1.5 of talcum powder B, 15-20 mu m of bentonite and 70-80 mu m of fly ash;
and (3): performing radiation treatment on the slurry in the step (2) for 6-8h by adopting Cs-137 under the stirring speed of 40 r/min;
and (4): respectively placing 1 layer of low-alkali glass fiber grey cloth on two surfaces, adding the colloidal mixed slurry in the middle, rolling and forming, then curing for 7-12 hours at 35-45 ℃ and 80-90% humidity, demoulding, curing for 72 hours at 30-40 ℃ and 65-70% humidity, then curing for 7 days at normal temperature, and entering a cutting production line.
When various fillers are added into the slurry, the heat inside the prepared material cannot be released, when the external temperature and pressure are gradually increased, and the heat reaches a certain degree, the material is expanded, cracks and even bursting easily occur, and in addition, the bentonite is easy to absorb water and expand, so that the filling effect and the material strength are influenced; the bentonite in the invention can enhance the fire-proof limit of the material, simultaneously increase the plasticity and the cohesiveness of the slurry, inhibit the wood fiber shaving and other components in the board from layering, the talcum powder promotes the self hydration reaction of the fly ash to generate calcium silicate, increase the waterproofness of the material, and synergistically reduce the hydration heat, thereby reducing the temperature stress, inhibiting the material from generating cracks or bursting at high temperature and high pressure, simultaneously prolonging the setting time of a crystal phase, and increasing the stability of the material, and the fly ash is uniformly dispersed in the slurry and combined with the crystal phase, thereby refining capillary pores in the slurry, enhancing the strength of the material, improving the impermeability and the durability of the material, and simultaneously inhibiting the water-absorbing expansibility of the bentonite.
The invention has the following technical effects:
the flame-retardant shaving board prepared by the invention comprises the following components: (1) the invention is safe and environment-friendly, no binder is additionally used, the formaldehyde emission is as low as 0.07ml/L, the E0 grade is achieved, the formaldehyde emission is greatly lower than the European Union standard, and no other radioactive substances are generated; (2) the fireproof performance reaches A1 level, and deformation does not occur at the flame temperature of 1000 ℃; (3) the mechanical strength is high, the breaking strength reaches more than 45MPa, and the bearing capacity can reach 13000 KN; (4) the natural shaving board has excellent physical and chemical properties, excellent waterproof capability and corrosion resistance, and the service life of the natural shaving board is prolonged.
Detailed Description
The present invention is described in detail below by way of examples, it should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and those skilled in the art can make some insubstantial modifications and adaptations of the present invention based on the above-mentioned disclosure.
Example 1
The preparation method of the flame-retardant shaving board is carried out according to the following scheme:
step (1): adding 58 parts of magnesium sulfate into 62 parts of water to prepare a solution, then sequentially adding 100 parts of magnesium oxide, 1 part of citric acid monohydrate, 0.8 part of sodium citrate, 1.5 parts of calcium stearate and wood fiber shavings, and stirring for 18min at a stirring speed of 90r/min, wherein the weight ratio of the wood fiber shavings to the total of all the other components is 1: 7;
step (2): and then 8 parts of bentonite, 10 parts of fly ash and 10 parts of talcum powder are added and stirred to prepare mixed slurry, the stirring speed is 150r/min, and the stirring time is 40min to prepare colloidal mixed slurry, wherein the talcum powder is a mixture consisting of 6 mu m talcum powder A and 12 mu m talcum powder B, and the mixture consists of the following two kinds of talcum powder with different thicknesses according to the mass ratio: 1: 2 of talcum powder B, the particle size of bentonite is 16 mu m, and the particle size of fly ash is 75 mu m;
and (3): performing radiation treatment on the slurry in the step (2) for 6-8h by adopting Cs-137 under the stirring speed of 40 r/min;
and (4): respectively placing 1 layer of low-alkali glass fiber grey cloth on two surfaces, adding the colloidal mixed slurry in the middle, rolling and forming, then curing for 10 hours at 40 ℃ and 85% humidity, demoulding, curing for 72 hours at 35 ℃ and 68% humidity, then curing for 7 days at normal temperature, and entering a cutting production line.
The product of the invention is respectively soaked in clear water, saline water, acidic water and alkaline water for 10 days at the temperature of 20 +/-3 ℃, and the product has no obvious deformation, no peeling, pulverization and other phenomena on the surface. Therefore, the flame-retardant shaving board prepared by the invention has excellent water resistance and acid-base corrosion resistance.
The fire-retardant shaving board prepared by the invention is subjected to fire-retardant performance test, and the test result is shown in table 1.
Table 1:
the fire-retardant shaving board prepared by the invention achieves A1 fire-retardant grade, does not deform when meeting flame temperature of 1000 ℃, and does not release toxic substances in the process.
Example 2
The preparation method of the flame-retardant shaving board is carried out according to the following scheme:
step (1): adding 55 parts of magnesium sulfate into 65 parts of water to prepare a solution, then sequentially adding 100 parts of magnesium oxide, 1.6 parts of citric acid monohydrate, 0.5 part of sodium citrate, 2.8 parts of calcium stearate and wood fiber shavings, stirring for 15min at a stirring speed of 80r/min, wherein the weight ratio of the wood fiber shavings to the total of all the other components is 1: 8;
step (2): then 10 parts of bentonite, 6 parts of fly ash and 14 parts of talcum powder are added and stirred to prepare mixed slurry, the stirring speed is 160r/min, the stirring time is 30min to prepare colloidal mixed slurry, wherein the talcum powder is a mixture consisting of talcum powder A with the particle size D being 5.5 mu m and talcum powder B with the particle size being 10 mu m and two kinds of talcum powder with different thicknesses, and the mass ratio of the components is that the talcum powder A: talcum powder B is 2:1.2, the grain diameter of bentonite is 15 mu m, and the grain diameter of fly ash is 80 mu m;
and (3): performing radiation treatment on the slurry in the step (2) for 6 hours by adopting Cs-137 under the stirring speed of 40 r/min;
and (4): respectively placing 1 layer of low-alkali glass fiber grey cloth on two surfaces, adding the colloidal mixed slurry in the middle, rolling and forming, curing at 45 ℃ and 80% humidity for 7 hours, demolding, curing at 40 ℃ and 65% humidity for 72 hours, curing at normal temperature for 7 days, and entering a cutting production line.
Example 3
The preparation method of the flame-retardant shaving board is carried out according to the following scheme:
step (1): adding 60 parts of magnesium sulfate into 60 parts of water to prepare a solution, then sequentially adding 100 parts of magnesium oxide, 0.8 part of citric acid monohydrate, 1 part of sodium citrate, 0.5 part of calcium stearate and wood fiber shavings, and stirring for 20min at a stirring speed of 100r/min, wherein the weight ratio of the wood fiber shavings to the total of all the other components is 1: 6;
step (2): and then 5 parts of bentonite, 12 parts of fly ash and 9 parts of talcum powder are added and stirred to prepare mixed slurry, the stirring speed is 120r/min, the stirring time is 45min to prepare colloidal mixed slurry, wherein the talcum powder is a mixture consisting of 6.5 mu m-grain talcum powder A and 12 mu m-grain talcum powder B, and the mixture consists of the following two kinds of talcum powder with different thicknesses according to the mass ratio: 1.5: 2, the particle size of bentonite is 20 μm, and the particle size of fly ash is 70 μm;
and (3): performing radiation treatment on the slurry in the step (2) for 8 hours by adopting Cs-137 under the stirring speed of 40 r/min;
and (4): respectively placing 1 layer of low-alkali glass fiber grey cloth on two surfaces, adding the colloidal mixed slurry in the middle, rolling and forming, then curing for 12 hours at 35 ℃ and 90% humidity, demoulding, curing for 72 hours at 30 ℃ and 70% humidity, then curing for 7 days at normal temperature, and entering a cutting production line.
The physical and mechanical properties of the flame-retardant particle board prepared by the invention are tested and shown in table 2.
Table 2:
the formaldehyde emission of the flame-retardant shaving board prepared by the invention reaches E0 grade, which is lower than European standard, the dry shrinkage rate is 0.1%, the wet expansion rate is 0.1%, the dimensional stability of the board is good, the mechanical strength is high, the breaking strength can reach more than 45MPa, and the bearing capacity can reach 13000 KN.
Claims (5)
1. A preparation method of a flame-retardant shaving board is characterized by comprising the following steps: the flame-retardant shaving board is formed by mixing wood fiber shavings and flame-retardant slurry according to the specific gravity of 1:6-8 to form mixed slurry, spreading the slurry, rolling, curing and maintaining; adding magnesium sulfate into water to prepare a solution, then sequentially adding magnesium oxide, citric acid monohydrate, sodium citrate and calcium stearate, stirring for 15-20min at a stirring speed of 80-100r/min, then adding wood fiber shaving, bentonite, fly ash and talcum powder, stirring to prepare the slurry, wherein the stirring speed is 120-160r/min, and the stirring time is 30-45min, the talcum powder is a mixture consisting of talcum powder A with the particle size D =5.5-6.5 mu m and talcum powder B with the particle size of 10-12 mu m and different thicknesses, and the mass ratio of the components is talcum powder A: talcum powder B =2:1-1.5, the curing and curing are carried out for 7-12 hours under the conditions of 35-45 ℃ and 80-90% of humidity after roll forming, the curing is carried out for 72 hours under the conditions of 30-40 ℃ and 65-70% of humidity after demolding, and then the curing is carried out for 7 days at normal temperature.
2. A fire retardant particle board as defined in claim 1, wherein: the raw materials comprise 100 parts of magnesium oxide, 55-60 parts of magnesium sulfate and 60-65 parts of water according to the specific gravity, and the reaction auxiliary agent comprises 0.8-1.6 parts of citric acid monohydrate, 0.5-1 part of sodium citrate and 0.5-2.8 parts of calcium stearate according to the specific gravity.
3. A fire retardant particle board as claimed in claim 2, wherein: the flame-retardant slurry is also added with filling materials of 5-10 parts of bentonite, 6-12 parts of fly ash and 9-14 parts of talcum powder according to the weight ratio.
4. A fire retardant particle board according to any one of claims 1-3, wherein: the colloidal mixed slurry is irradiated for 6-8h by adopting Cs-137 under the stirring speed of 40 r/min.
5. The preparation method of the flame-retardant shaving board is characterized by comprising the following steps of:
step (1): adding 55-60 parts of magnesium sulfate into 60-65 parts of water to prepare a solution, then sequentially adding 100 parts of magnesium oxide, 0.8-1.6 parts of citric acid monohydrate, 0.5-1 part of sodium citrate, 0.5-2.8 parts of calcium stearate and wood fiber shavings, stirring for 15-20min at the stirring speed of 80-100r/min, wherein the weight ratio of the wood fiber shavings to the total of all the other components is 1: 6-8;
step (2): then 5-10 parts of bentonite, 6-12 parts of fly ash and 9-14 parts of talcum powder are added and stirred to prepare mixed slurry, the stirring speed is 120-160r/min, and the stirring time is 30-45min to prepare colloidal mixed slurry, wherein the talcum powder is a mixture consisting of talcum powder A with the particle size D =5.5-6.5 mu m and talcum powder B with the particle size of 10-12 mu m and the two talcum powders with different thicknesses, and the components have the mass ratio of talcum powder A: talcum powder B =2: 1-1.5;
and (3): performing irradiation treatment on the slurry obtained in the step (2) for 6-8h by adopting Cs-137 at a stirring speed of 40 r/min;
and (4): respectively placing 1 layer of low-alkali glass fiber grey cloth on two surfaces, adding the colloidal mixed slurry in the middle, rolling and forming, then curing for 7-12 hours at 35-45 ℃ and 80-90% humidity, demoulding, curing for 72 hours at 30-40 ℃ and 65-70% humidity, then curing for 7 days at normal temperature, and entering a cutting production line.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111844344A (en) * | 2020-07-20 | 2020-10-30 | 上海苏云木业有限公司 | Anion bamboo-wood fiber glued formaldehyde-free flame-retardant plate and preparation method thereof |
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| CN107640949A (en) * | 2016-07-20 | 2018-01-30 | 重庆市镁晶防火材料有限公司 | A kind of magnesium crystalline substance fireproof board and preparation method thereof |
| CN108774042A (en) * | 2018-05-24 | 2018-11-09 | 武汉格林森建筑科技有限公司 | One seeds algae calcium and magnesium composite material, ecological composite plate and its preparation and application |
| CN108943250A (en) * | 2018-06-29 | 2018-12-07 | 广西浙缘农业科技有限公司 | A kind of processing method of artificial chipboard |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111844344A (en) * | 2020-07-20 | 2020-10-30 | 上海苏云木业有限公司 | Anion bamboo-wood fiber glued formaldehyde-free flame-retardant plate and preparation method thereof |
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