阅读说明：本技术 一种防火无甲醛胶合板及其制作方法 (Fireproof formaldehyde-free plywood and manufacturing method thereof ) 是由 李琴 于 2021-09-07 设计创作，主要内容包括：本发明涉及胶合板技术领域,且公开了一种防火无甲醛胶合板及其制作方法,包括三个单板,三个单板之间通过胶水热压连接,三个单板由上至下依次为面板、中间板和底板,所述中间板包括以下分量组成原料,秸秆渣20-40份、竹板20-30、岩棉50-60份、氢氧化铝阻燃剂10-20份、抗菌剂1-3份和胶水100-140份。该防火无甲醛胶合板及其制作方法,底板和中层板,均具有良好的防火性能,生产中使用的胶水,原料配比合理,不含甲醛有害物质,胶合性能和稳定性能好,并且具备较好的耐水性能,从而起到环保的效果。(The invention relates to the technical field of plywood, and discloses a fireproof formaldehyde-free plywood and a manufacturing method thereof, wherein the fireproof formaldehyde-free plywood comprises three veneers, the three veneers are connected through glue in a hot pressing mode, the three veneers sequentially comprise a panel, a middle plate and a bottom plate from top to bottom, the middle plate comprises the following raw materials, 20-40 parts of straw residues, 20-30 parts of bamboo plates, 50-60 parts of rock wool, 10-20 parts of aluminum hydroxide flame retardant, 1-3 parts of antibacterial agent and 140 parts of glue. The fireproof formaldehyde-free plywood and the manufacturing method thereof have the advantages that the bottom plate and the middle layer plate both have good fireproof performance, glue used in production is reasonable in raw material proportion, does not contain formaldehyde harmful substances, is good in bonding performance and stability, and has good water resistance, so that the environment-friendly effect is achieved.)

1. The fireproof formaldehyde-free plywood comprises three veneers, wherein the three veneers are connected through glue in a hot-pressing mode, and the three veneers are a panel (1), an intermediate plate (2) and a bottom plate (3) from top to bottom in sequence, and is characterized in that: the middle plate (2) comprises the following raw materials, by weight, 20-40 parts of straw residues, 20-30 parts of bamboo plates, 50-60 parts of rock wool, 10-20 parts of aluminum hydroxide flame retardant, 1-3 parts of antibacterial agent and 100-140 parts of glue.

2. A fire-proof formaldehyde-free plywood and a manufacturing method thereof according to claim 2, wherein the preparation of the bottom board (3) comprises the following steps:

s1, selecting materials, cooking, selecting a plate raw material, and then performing cooking softening treatment on the plate raw material;

s2, adding the board raw material obtained in the step S1 into a defibrator to obtain basic fibers;

s3, mixing the basic fiber, the asbestos fiber and the resin fiber in a mounting ratio of 3:1:1 to form mixed fiber;

s4, collecting the mixed fibers, adding the flame retardant, the paraffin emulsion and the glue, mixing uniformly, and drying to obtain a mixture;

s5, adding the mixture into a mold, paving a plurality of layers, and then performing hot-pressing treatment to form a plate blank;

and S6, cutting edges and sanding the hot-pressed plate blank, and curing to obtain the bottom plate (3).

3. The fireproof formaldehyde-free plywood and the manufacturing method thereof according to claim 2, wherein the fireproof formaldehyde-free plywood is characterized in that: in the step S1, the bottom plate (3) is made of one of basswood, ash wood, birch, elm and poplar.

4. The fireproof formaldehyde-free plywood and the manufacturing method thereof according to claim 2, wherein the fireproof formaldehyde-free plywood is characterized in that: in the step S4, the mass fraction ratio of the mixed fiber, the flame retardant, the paraffin emulsion and the glue is 50: 2-6: 17-23:40.

5. A fire-proof formaldehyde-free plywood and a manufacturing method thereof according to claim 1, wherein the preparation of the middle plate (2) comprises the following steps:

(1) drying the straw residues and the bamboo boards, wherein the water content is controlled to be 8-12%;

(2) cutting the dried straw and bamboo board into long sections with the length of 30-40 mm;

(3) crushing the straws by a crusher to obtain fine materials with the length-diameter ratio of 1-5, and crushing the bamboo boards by the crusher to obtain coarse materials with the length-diameter ratio of 1-16;

(4) adding the coarse material into a mould for multilayer bedding, then adding the fine material and rock wool to fill the gap, and finally adding the aluminum hydroxide flame retardant, the antibacterial agent and the glue;

(5) forming a plate blank after hot pressing by a hot press;

(6) and cutting edges and sanding the hot-pressed plate blank, and then curing to obtain the intermediate plate (2).

6. The fireproof formaldehyde-free plywood and the manufacturing method thereof according to claim 6, wherein the fireproof formaldehyde-free plywood is characterized in that: in the step (2), the working pressure of the hot press is 20-22mpa, the temperature is 100-: and (3) when the temperature of the flat plate of the hot press is less than or equal to 45 ℃, loading the plate, and after the hot pressing process is finished, unloading the plate when the temperature of the flat plate of the hot press is less than or equal to 50 ℃.

7. The fireproof formaldehyde-free plywood and the manufacturing method thereof according to claim 1, wherein the fireproof formaldehyde-free plywood is characterized in that: the thickness of the bottom plate (1) is 0.2-0.4cm, and the thickness of the middle plate (2) is 0.6-0.8 mm.

8. The fireproof formaldehyde-free plywood and the manufacturing method thereof according to claim 1, wherein the fireproof formaldehyde-free plywood is characterized in that: the glue comprises the following raw materials in parts by weight: 10-30 parts of ammonia water, 20-40 parts of polyvinyl alcohol, 45-70 parts of methyl acrylate, 70-110 parts of ethyl acrylate, 100 parts of distilled water, 50-60 parts of water-based acrylic emulsion, 1-3 parts of defoaming agent, 0.1-0.3 part of wetting agent, 2-4 parts of curing agent and 3-5 parts of antioxidant.

9. The fireproof formaldehyde-free plywood and the manufacturing method thereof according to claim 8, wherein the glue comprises the following production steps:

(a) adding a proper amount of ammonia water, polyvinyl alcohol, methyl acrylate, ethyl acrylate and distilled water aqueous acrylic emulsion into a stirrer, and stirring for 1-2h under the condition that the rotation speed of a stirring shaft is 800-;

(b) adding a defoaming agent and a wetting agent into a stirrer, and stirring for 30 minutes under the condition that the rotating speed of a stirring shaft is 300 revolutions per minute;

(c) adding an antioxidant, and stirring for 30 minutes at the rotation speed of a stirring shaft of 800 revolutions per minute, wherein the temperature is 70-90 ℃ during stirring;

(d) cooling to below 40 deg.c, adding curing agent and taking out.

Technical Field

The invention relates to the technical field of plywood, in particular to fireproof formaldehyde-free plywood and a manufacturing method thereof.

Background

The plywood is one of common furniture materials and is an artificial board. Plywood is a three-layer or multi-layer plate material made up by using wood segments and making them be rotary-cut into single board or sliced into thin wood and using adhesive to make them be glued together, and usually using odd number of layers of single board and making the fibre directions of adjacent layers of single board be mutually perpendicular.

Through retrieval, publication No. CN 102699963A discloses an anticorrosive plywood and a production method thereof, the anticorrosive plywood is prepared by alternately overlapping and cold pressing anticorrosive veneers and glued anticorrosive veneers; the anti-corrosion veneer is prepared by soaking a veneer in an anti-corrosion agent for a period of time and then drying, and the glued anti-corrosion veneer is prepared by coating an adhesive on the upper surface and the lower surface of the anti-corrosion veneer. And (3) alternately superposing the glued anticorrosive veneers and the anticorrosive veneers to a blank with a required thickness, and then performing cold pressing to obtain the anticorrosive plywood. The anticorrosive plywood is produced by cold pressing at room temperature, has good dimensional stability, adjustable thickness, uniform distribution of the preservative, strong loss resistance and lower cost; the product can replace the anticorrosion wood products of the logs, and reduce the consumption of the logs with large diameter.

At present, fireproof plywood on the market is usually made of heat-resistant wood such as basswood, fraxinus mandshurica and birch, the fireproof performance of the board depends on the material of the board, so that the fireproof performance is poor, and the plywood on the upper surface does not solve the problem that the fireproof performance of the plywood is poor, and writing glue used during the production of the plywood contains a large amount of formaldehyde and damages the health of workers.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a fireproof formaldehyde-free plywood and a manufacturing method thereof, which solve the problems that the fireproof performance of the plywood is poor, the plywood on the upper side is poor as in the above patent, and writing glue used in the production of the plywood contains a large amount of formaldehyde and damages the health of workers.

(II) technical scheme

The invention provides the following technical scheme: the fireproof formaldehyde-free plywood comprises three veneers, wherein the three veneers are connected through glue in a hot pressing mode, the three veneers sequentially comprise a panel, a middle plate and a bottom plate from top to bottom, and the middle plate comprises the following raw materials of 20-40 parts of straw residues, 20-30 parts of bamboo plates, 50-60 parts of rock wool, 10-20 parts of aluminum hydroxide fire retardants, 1-3 parts of antibacterial agents and 140 parts of 100-doped glue.

The invention is further provided with: the preparation of the soleplate (3) comprises the following steps:

s1, selecting materials, cooking, selecting a plate raw material, and then performing cooking softening treatment on the plate raw material;

s2, adding the board raw material obtained in the step S1 into a defibrator to obtain basic fibers;

s3, mixing the basic fiber, the asbestos fiber and the resin fiber in a mounting ratio of 3:1:1 to form mixed fiber;

s4, collecting the mixed fibers, adding the flame retardant, the paraffin emulsion and the glue, mixing uniformly, and drying to obtain a mixture;

s5, adding the mixture into a mold, paving a plurality of layers, and then performing hot-pressing treatment to form a plate blank;

and S6, cutting edges and sanding the hot-pressed plate blank, and curing to obtain the bottom plate.

By adopting the technical scheme, when the bottom plate is produced, the paraffin emulsion, the resin fiber and the asbestos fiber are added, and the paraffin emulsion and the glue are mixed together, so that the plate has water resistance and the surface smoothness is improved. Because the paraffin emulsion has small granularity, in the plate manufacturing process, the tiny wax particles can be separated out from the water phase and uniformly adsorbed on the mixed fiber by effectively demulsifying.

The invention is further provided with: in the step S1, the bottom plate is made of one of basswood, ash wood, birch, elm and poplar.

Through adopting above-mentioned technical scheme, improve the fire prevention fire behaviour of bottom plate.

The invention is further provided with: in the step S4, the mass fraction ratio of the mixed fiber, the flame retardant, the paraffin emulsion and the glue is 50: 2-6: 17-23:40.

By adopting the technical scheme, the proportion distribution is scientific and reasonable, the protective flame retardant property of the bottom plate can be improved through the added flame retardant, and the plate has water resistance and improved surface smoothness through the added paraffin emulsion. Because the paraffin emulsion has small granularity, in the plate manufacturing process, the tiny wax particles can be separated out from the water phase through effective demulsification and are uniformly adsorbed on the mixed fiber, and the added asbestos fiber has the characteristics of heat resistance, non-combustion, water resistance, acid resistance and chemical corrosion resistance, thereby further improving the service performance of the bottom plate.

The invention is further provided with: the preparation of the intermediate plate comprises the following steps:

(1) drying the straw residues and the bamboo boards, wherein the water content is controlled to be 8-12%;

(2) cutting the dried straw and bamboo board into long sections with the length of 30-40 mm;

(3) crushing the straws by a crusher to obtain fine materials with the length-diameter ratio of 1-5, and crushing the bamboo boards by the crusher to obtain coarse materials with the length-diameter ratio of 1-16;

(4) adding the coarse material into a mould for multilayer bedding, then adding the fine material and rock wool to fill the gap, and finally adding the aluminum hydroxide flame retardant, the antibacterial agent and the glue;

(5) forming a plate blank after hot pressing by a hot press;

(6) and cutting edges and sanding the hot-pressed plate blank, and curing to obtain the intermediate plate.

The invention is further provided with: the added rock wool can reduce the quality of the plate, ensure that the heat conductivity coefficient of the plate is small, has the characteristics of heat absorption and non-combustion, and improves the fireproof and flame-retardant properties of the plate; and the straw is useless waste generated in agricultural production, and has the effect of recycling the waste.

The invention is further provided with: in the step (2), the working pressure of the hot press is 20-22mpa, the temperature is 100-: and (3) when the temperature of the flat plate of the hot press is less than or equal to 45 ℃, loading the plate, and after the hot pressing process is finished, unloading the plate when the temperature of the flat plate of the hot press is less than or equal to 50 ℃.

Through adopting above-mentioned technical scheme, play and improve product hot pressing effect, improve the effect that hot pressing work efficiency is high.

The invention is further provided with: the thickness of the bottom plate (1) is 0.2-0.4cm, and the thickness of the middle plate (2) is 0.6-0.8 mm.

The invention is further provided with: the glue comprises the following raw materials in parts by weight: 10-30 parts of ammonia water, 20-40 parts of polyvinyl alcohol, 45-70 parts of methyl acrylate, 70-110 parts of ethyl acrylate, 100 parts of distilled water, 50-60 parts of water-based acrylic emulsion, 1-3 parts of defoaming agent, 0.1-0.3 part of wetting agent, 2-4 parts of curing agent and 3-5 parts of antioxidant.

The invention is further provided with: the glue comprises the following production steps:

(a) adding a proper amount of ammonia water, polyvinyl alcohol, methyl acrylate, ethyl acrylate and distilled water aqueous acrylic emulsion into a stirrer, and stirring for 1-2h under the condition that the rotation speed of a stirring shaft is 800-;

(b) adding a defoaming agent and a wetting agent into a stirrer, and stirring for 30 minutes under the condition that the rotating speed of a stirring shaft is 300 revolutions per minute;

(c) adding an antioxidant, and stirring for 30 minutes at the rotation speed of a stirring shaft of 800 revolutions per minute, wherein the temperature is 70-90 ℃ during stirring;

(d) cooling to below 40 deg.c, adding curing agent and taking out.

By adopting the technical scheme, the raw material ratio is reasonable, no formaldehyde harmful substance is contained, the bonding performance and the stability are good, and the waterproof performance is good, the methyl acrylate is adopted, the ethyl acrylate has higher adhesive force due to the action of side hydrogen bonds, the viscosity is good, the polyvinyl alcohol is adopted as a monomer, the polyvinyl alcohol has good dilutability and adhesive force, and the ethyl acrylate is matched with a proper ratio, so that the adhesive layer has good adhesive force, flexibility and a higher curing rate, and the viscosity and the adhesive force can be further improved by adding ammonia water and aqueous acrylic emulsion to mix and crosslink with the aqueous acrylic emulsion, thereby improving the overall viscosity.

(III) advantageous effects

Compared with the prior art, the invention provides the fireproof formaldehyde-free plywood and the manufacturing method thereof, and the fireproof formaldehyde-free plywood has the following beneficial effects:

(1) the fireproof formaldehyde-free plywood and the manufacturing method thereof have the advantages that during the production of the bottom plate, the paraffin emulsion, the resin fiber and the asbestos fiber are added, and the paraffin emulsion and the glue are mixed together, so that the board has water resistance and the surface smoothness is improved. Because the paraffin emulsion has small granularity, in the plate manufacturing process, the tiny wax particles can be separated out from the water phase and uniformly adsorbed on the mixed fiber by effectively demulsifying.

(2) The fireproof formaldehyde-free plywood and the manufacturing method thereof have the advantages that raw material distribution is scientific and reasonable during production of the bottom plate, the protective flame retardant property of the bottom plate can be improved through the added flame retardant, and the water resistance and the surface smoothness of the board are improved through the added paraffin emulsion. Because the paraffin emulsion has small granularity, in the plate manufacturing process, the tiny wax particles can be separated out from the water phase through effective demulsification and are uniformly adsorbed on the mixed fiber, and the added asbestos fiber has the characteristics of heat resistance, non-combustion, water resistance, acid resistance and chemical corrosion resistance, thereby further improving the service performance of the bottom plate.

(3) According to the fireproof formaldehyde-free plywood and the manufacturing method thereof, the straws are used as raw materials, the straws are useless waste materials generated in agricultural production, the effect of recycling the waste materials is achieved, the quality of the board can be reduced through the added rock wool, the heat conductivity coefficient of the board is small, the fireproof formaldehyde-free plywood has the characteristics of heat absorption and non-combustion, and the fireproof flame retardant performance of the board is improved.

(4) The fireproof formaldehyde-free plywood and the manufacturing method thereof have the advantages that the bottom plate and the middle layer plate both have good fireproof performance, glue used in production is reasonable in raw material proportion, does not contain formaldehyde harmful substances, is good in bonding performance and stability, and has good water resistance, so that the environment-friendly effect is achieved.

(5) According to the fireproof formaldehyde-free plywood and the manufacturing method thereof, methyl acrylate is adopted during glue production, ethyl acrylate has high adhesive force due to the action of side hydrogen bonds and is good in viscosity, polyvinyl alcohol is adopted as a monomer, the hexylvinyl alcohol has good dilutability and adhesive force, and is matched with the methyl acrylate and the ethyl acrylate in a proper proportion, so that a glue layer has good adhesive force, flexibility and solidification rate, and meanwhile, the viscosity and the adhesive force can be further improved by adding ammonia water and aqueous acrylic emulsion to mix and crosslink with the aqueous acrylic emulsion, and the overall viscosity is improved.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

In the figure: 1. a panel; 2. a middle plate; 3. a base plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Embodiment 1, please refer to fig. 1, a fire-proof formaldehyde-free plywood and a manufacturing method thereof, comprising three veneers, wherein the three veneers are connected by glue through hot pressing, the three veneers are sequentially a panel 1, a middle plate 2 and a bottom plate 3 from top to bottom, the middle plate comprises the following raw materials, 20 parts of straw residues, 20 parts of bamboo plates, 50 parts of rock wool, 10 parts of aluminum hydroxide fire retardant, 1 part of antibacterial agent and 100 parts of glue.

Further, the preparation of the base plate 3 comprises the following steps:

s1, selecting materials, cooking, selecting a plate raw material, and then performing cooking softening treatment on the plate raw material;

s2, adding the board raw material obtained in the step S1 into a defibrator to obtain basic fibers;

s3, mixing the basic fiber, the asbestos fiber and the resin fiber in a mounting ratio of 3:1:1 to form mixed fiber;

s4, collecting the mixed fibers, adding the flame retardant, the paraffin emulsion and the glue, mixing uniformly, and drying to obtain a mixture;

s5, adding the mixture into a mold, paving a plurality of layers, and then performing hot-pressing treatment to form a plate blank;

and S6, cutting edges and sanding the hot-pressed plate blank, and curing to obtain the bottom plate 3.

Further, in the step S1, the bottom plate 3 is made of one of basswood, ash wood, birch, elm and poplar.

Further, in the step S4, the mass fraction ratio of the mixed fiber, the flame retardant, the paraffin emulsion and the glue is 50: 2: 17:40.

Further, the preparation of the intermediate plate 2 comprises the following steps:

(1) drying the straw residues and the bamboo boards, wherein the water content is controlled at 8%;

(2) cutting the dried straws and bamboo boards into long sections with the length of 30 mm;

(3) crushing the straws by a crusher to obtain fine materials with the length-diameter ratio of 1, and crushing the bamboo boards by the crusher to obtain coarse materials with the length-diameter ratio of 1;

(4) adding the coarse material into a mould for multilayer bedding, then adding the fine material and rock wool to fill the gap, and finally adding the aluminum hydroxide flame retardant, the antibacterial agent and the glue;

(5) after hot pressing by a hot press, a plate blank is formed

(6) And cutting edges and sanding the hot-pressed plate blank, and then curing to obtain the intermediate plate 2.

Further, in the step (2), the working pressure of the hot press is 20mpa, the temperature is 10 ℃, the time is 10min, and a cold-in and cold-out hot-pressing process is adopted in the hot-pressing process: and (3) when the temperature of the flat plate of the hot press is less than or equal to 45 ℃, loading the plate, and after the hot pressing process is finished, unloading the plate when the temperature of the flat plate of the hot press is less than or equal to 50 ℃.

Further, the thickness of the bottom plate 1 is 0.2cm, and the thickness of the middle plate 2 is 0.6 mm.

Further, the glue comprises the following raw materials in parts by weight: 10 parts of ammonia water, 20 parts of polyvinyl alcohol, 45 parts of methyl acrylate, 70 parts of ethyl acrylate, 100 parts of distilled water, 200 parts of aqueous acrylic emulsion, 1-3 parts of defoaming agent, 0.1-0.3 part of wetting agent, 2-4 parts of curing agent and 3-5 parts of antioxidant.

Further, the glue comprises the following production steps:

(a) adding a proper amount of ammonia water, polyvinyl alcohol, methyl acrylate, ethyl acrylate and distilled water aqueous acrylic emulsion into a stirrer, and stirring for 1h under the condition that the rotating speed of the stirrer is 800 revolutions per minute;

(b) adding a defoaming agent and a wetting agent into a stirrer, and stirring for 30 minutes under the condition that the rotating speed of a stirring shaft is 300 revolutions per minute;

(c) adding an antioxidant, and stirring for 30 minutes at the rotation speed of a stirring shaft of 800 revolutions per minute, wherein the temperature is 70 ℃ during stirring;

(d) cooling to below 40 deg.c, adding curing agent and taking out.

Embodiment 2, please refer to fig. 1, which is a fireproof formaldehyde-free plywood and a manufacturing method thereof, the fireproof formaldehyde-free plywood comprises three veneers, the three veneers are connected through glue in a hot pressing manner, the three veneers sequentially comprise a panel 1, a middle plate 2 and a bottom plate 3 from top to bottom, and the middle plate comprises the following raw materials, 30 parts of straw residues, 25 parts of bamboo plates, 55 parts of rock wool, 15 parts of aluminum hydroxide flame retardant, 2 parts of antibacterial agent and 120 parts of glue.

Further, the preparation of the base plate 3 comprises the following steps:

s1, selecting materials, cooking, selecting a plate raw material, and then performing cooking softening treatment on the plate raw material;

s2, adding the board raw material obtained in the step S1 into a defibrator to obtain basic fibers;

s3, mixing the basic fiber, the asbestos fiber and the resin fiber in a mounting ratio of 3:1:1 to form mixed fiber;

s4, collecting the mixed fibers, adding the flame retardant, the paraffin emulsion and the glue, mixing uniformly, and drying to obtain a mixture;

s5, adding the mixture into a mold, paving a plurality of layers, and then performing hot-pressing treatment to form a plate blank;

and S6, cutting edges and sanding the hot-pressed plate blank, and curing to obtain the bottom plate 3.

Further, in the step S1, the bottom plate 3 is made of one of basswood, ash wood, birch, elm and poplar.

Further, in the step S4, the mass fraction ratio of the mixed fiber, the flame retardant, the paraffin emulsion and the glue is 50: 4: 20:40.

Further, the preparation of the intermediate plate 2 comprises the following steps:

(1) drying the straw residues and the bamboo boards, wherein the water content is controlled to be 10%;

(2) cutting the dried straws and bamboo boards into long sections with the length of 35 mm;

(3) crushing the straws by a crusher to obtain fine materials with the length-diameter ratio of 3, and crushing the bamboo boards by the crusher to obtain coarse materials with the length-diameter ratio of 8;

(4) adding the coarse material into a mould for multilayer bedding, then adding the fine material and rock wool to fill the gap, and finally adding the aluminum hydroxide flame retardant, the antibacterial agent and the glue;

(5) after hot pressing by a hot press, a plate blank is formed

(6) And cutting edges and sanding the hot-pressed plate blank, and then curing to obtain the intermediate plate 2.

Further, in the step (2), the working pressure of the hot press is 21mpa, the temperature is 115 ℃, the time is 20min, and the hot pressing process adopts a cold-in and cold-out hot pressing process: and (3) when the temperature of the flat plate of the hot press is less than or equal to 45 ℃, loading the plate, and after the hot pressing process is finished, unloading the plate when the temperature of the flat plate of the hot press is less than or equal to 50 ℃.

Further, the thickness of the bottom plate 1 is 0.3cm, and the thickness of the middle plate 2 is 0.7 mm.

Further, the glue comprises the following raw materials in parts by weight: 20 parts of ammonia water, 30 parts of polyvinyl alcohol, 60 parts of methyl acrylate, 90 parts of ethyl acrylate, 150 parts of distilled water, 55 parts of water-based acrylic emulsion, 2 parts of defoaming agent, 0.2 part of wetting agent, 3 parts of curing agent and 4 parts of antioxidant.

Further, the glue comprises the following production steps:

(a) adding a proper amount of ammonia water, polyvinyl alcohol, methyl acrylate, ethyl acrylate and distilled water aqueous acrylic emulsion into a stirrer, and stirring for 1-2 hours under the condition that the rotating speed of a stirring shaft is 1000 revolutions per minute;

(b) adding a defoaming agent and a wetting agent into a stirrer, and stirring for 30 minutes under the condition that the rotating speed of a stirring shaft is 300 revolutions per minute;

(c) adding an antioxidant, and stirring for 30 minutes at the rotation speed of a stirring shaft of 800 revolutions per minute, wherein the temperature is 80 ℃ during stirring;

(d) cooling to below 40 deg.C, adding curing agent, and taking out

Embodiment 3, please refer to fig. 1, a fireproof formaldehyde-free plywood and a manufacturing method thereof, comprising three veneers, wherein the three veneers are connected by glue through hot pressing, the three veneers are a panel 1, a middle plate 2 and a bottom plate 3 from top to bottom, and the middle plate comprises the following raw materials, 40 parts of straw residues, 30 parts of bamboo plates, 60 parts of rock wool, 20 parts of aluminum hydroxide fire retardant, 3 parts of antibacterial agent and 140 parts of glue.

Further, the preparation of the base plate 3 comprises the following steps:

s1, selecting materials, cooking, selecting a plate raw material, and then performing cooking softening treatment on the plate raw material;

s2, adding the board raw material obtained in the step S1 into a defibrator to obtain basic fibers;

s3, mixing the basic fiber, the asbestos fiber and the resin fiber in a mounting ratio of 3:1:1 to form mixed fiber;

s4, collecting the mixed fibers, adding the flame retardant, the paraffin emulsion and the glue, mixing uniformly, and drying to obtain a mixture;

s5, adding the mixture into a mold, paving a plurality of layers, and then performing hot-pressing treatment to form a plate blank;

and S6, cutting edges and sanding the hot-pressed plate blank, and curing to obtain the bottom plate 3.

Further, in the step S1, the bottom plate 3 is made of one of basswood, ash wood, birch, elm and poplar.

Further, in the step S4, the mass fraction ratio of the mixed fiber, the flame retardant, the paraffin emulsion and the glue is 50: 6: 23:40.

Further, the preparation of the intermediate plate 2 comprises the following steps:

(1) drying the straw residues and the bamboo boards, and controlling the water content to be 12%;

(2) cutting the dried straws and bamboo boards into long sections with the length of 40 mm;

(3) crushing the straws by a crusher to obtain fine materials with the length-diameter ratio of 5, and crushing the bamboo boards by the crusher to obtain coarse materials with the length-diameter ratio of 16;

(4) adding the coarse material into a mould for multilayer bedding, then adding the fine material and rock wool to fill the gap, and finally adding the aluminum hydroxide flame retardant, the antibacterial agent and the glue;

(5) after hot pressing by a hot press, a plate blank is formed

(6) And cutting edges and sanding the hot-pressed plate blank, and then curing to obtain the intermediate plate 2.

Further, in the step (2), the working pressure of the hot press is 22mpa, the temperature is 130 ℃, the time is 30min, and the hot pressing process adopts a cold-in and cold-out hot pressing process: and (3) when the temperature of the flat plate of the hot press is less than or equal to 45 ℃, loading the plate, and after the hot pressing process is finished, unloading the plate when the temperature of the flat plate of the hot press is less than or equal to 50 ℃.

Further, the thickness of the bottom plate 1 is 0.4cm, and the thickness of the middle plate 2 is 0.8 mm.

Further, the glue comprises the following raw materials in parts by weight: 0 part of ammonia water, 40 parts of polyvinyl alcohol, 70 parts of methyl acrylate, 110 parts of ethyl acrylate, 200 parts of distilled water, 60 parts of water-based acrylic emulsion, 3 parts of defoaming agent, 0.3 part of wetting agent, 4 parts of curing agent and 5 parts of antioxidant.

Further, the glue comprises the following production steps:

(a) adding a proper amount of ammonia water, polyvinyl alcohol, methyl acrylate, ethyl acrylate, distilled water and aqueous acrylic emulsion into a stirrer, and stirring for 1-2 hours under the condition that the rotating speed of a stirring shaft is 1200 revolutions per minute;

(b) adding a defoaming agent and a wetting agent into a stirrer, and stirring for 30 minutes under the condition that the rotating speed of a stirring shaft is 300 revolutions per minute;

(c) adding an antioxidant, and stirring for 30 minutes at the rotating speed of a stirring shaft of 800 revolutions per minute, wherein the temperature is 90 ℃ during stirring;

(d) cooling to below 40 deg.C, adding curing agent, and taking out

In conclusion, the fireproof formaldehyde-free plywood and the manufacturing method thereof have the advantages that the paraffin emulsion, the resin fiber and the asbestos fiber are added during the production of the bottom plate, and the paraffin emulsion and the glue are mixed together, so that the board has water resistance and the surface smoothness is improved. Because the paraffin emulsion has small granularity, in the plate manufacturing process, the tiny wax particles can be separated out from the water phase and uniformly adsorbed on the mixed fiber by effectively demulsifying.

The fireproof formaldehyde-free plywood and the manufacturing method thereof have the advantages that raw material distribution is scientific and reasonable during production of the bottom plate, the protective flame retardant property of the bottom plate can be improved through the added flame retardant, and the water resistance and the surface smoothness of the board are improved through the added paraffin emulsion. Because the paraffin emulsion has small granularity, in the plate manufacturing process, the tiny wax particles can be separated out from the water phase through effective demulsification and are uniformly adsorbed on the mixed fiber, and the added asbestos fiber has the characteristics of heat resistance, non-combustion, water resistance, acid resistance and chemical corrosion resistance, thereby further improving the service performance of the bottom plate.

According to the fireproof formaldehyde-free plywood and the manufacturing method thereof, the straws are used as raw materials, the straws are useless waste materials generated in agricultural production, the effect of recycling the waste materials is achieved, the quality of the board can be reduced through the added rock wool, the heat conductivity coefficient of the board is small, the fireproof formaldehyde-free plywood has the characteristics of heat absorption and non-combustion, and the fireproof flame retardant performance of the board is improved.

The fireproof formaldehyde-free plywood and the manufacturing method thereof have the advantages that the bottom plate and the middle layer plate both have good fireproof performance, glue used in production is reasonable in raw material proportion, does not contain formaldehyde harmful substances, is good in bonding performance and stability, and has good water resistance, so that the environment-friendly effect is achieved.

According to the fireproof formaldehyde-free plywood and the manufacturing method thereof, methyl acrylate is adopted during glue production, ethyl acrylate has high adhesive force due to the action of side hydrogen bonds and is good in viscosity, polyvinyl alcohol is adopted as a monomer, the hexylvinyl alcohol has good dilutability and adhesive force, and is matched with the methyl acrylate and the ethyl acrylate in a proper proportion, so that a glue layer has good adhesive force, flexibility and solidification rate, and meanwhile, the viscosity and the adhesive force can be further improved by adding ammonia water and aqueous acrylic emulsion to mix and crosslink with the aqueous acrylic emulsion, and the overall viscosity is improved.

It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The standard parts used in the present application document can be purchased from the market, and can be customized according to the description of the specification and the accompanying drawings, the specific connection mode of each part adopts the conventional means matured in the prior art, the machines, the parts and the equipment adopt the conventional types in the prior art, the circuit connection adopts the conventional connection mode in the prior art, no specific description is provided here, meanwhile, the electric elements appearing in the specification are electrically connected with the external main controller and the mains supply, the peripheral controller mentioned in the specification can play a control role for the electric elements mentioned in the specification, and the peripheral controller is the conventional known equipment.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.