CN106965269A - A kind of formaldehydeless flame-retardant plywood and preparation method thereof - Google Patents
A kind of formaldehydeless flame-retardant plywood and preparation method thereof Download PDFInfo
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- CN106965269A CN106965269A CN201710275980.XA CN201710275980A CN106965269A CN 106965269 A CN106965269 A CN 106965269A CN 201710275980 A CN201710275980 A CN 201710275980A CN 106965269 A CN106965269 A CN 106965269A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/16—Halogen-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J129/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Adhesives based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Adhesives based on derivatives of such polymers
- C09J129/02—Homopolymers or copolymers of unsaturated alcohols
- C09J129/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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- Polymers & Plastics (AREA)
- Medicinal Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Forests & Forestry (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a kind of formaldehydeless flame-retardant plywood and preparation method thereof, including flaggy, the flaggy is veneer, the veneer surface is provided with adhesive layer, the adhesive layer includes magnesia, magnesium chloride and polyvinyl alcohol, also added with small powder in the adhesive layer, the small powder is the one or more in foaming agent, diffusant and modifying agent, by being applied in combination for polyvinyl alcohol and chlorine oxygen magnesium, reach that the glued board of production has fabulous physical and mechanical property and formaldehydeless, fire-retardant, intensity is high and with pliability, the performance of insect prevention by cold-press process.
Description
Technical field
The present invention relates to sheet technical field, and in particular to a kind of formaldehydeless flame-retardant plywood and preparation method thereof.
Background technology
The glue of existing production glued board mainly uses formaldehyde, urea, the reaction product of a small amount of polyvinyl alcohol.The glue of production
Plywood contains formaldehyde, inflammable, non-watertight.Melamine is added in glue can generate waterproof glue, but the glued board of production is same
Sample contains formaldehyde, inflammable.Existing rubber made from soybean cake environmental protection is formaldehydeless but bonding strength is not enough, inflammable, non-watertight.Existing glued board exists
Substantial amounts of pernicious gas is discharged in production.Glued board is in use compared with major injury caused by containing formaldehyde to human body.To solve glue
In plywood Formaldehyde through study in a few years, discuss, put into a large amount of manpowers, financial resources and solve first finally by testing repeatedly
Aldehyde problem.Environmental protection can be produced by changing existing plywood production technology by having invented polyvinyl alcohol and the gel of chlorine oxygen magnesium generation
Type glued board.The glued board of this invention production is formaldehydeless and stronger than existing glued board with fire-retardant, waterproof, insect prevention, bonding strength
The high characteristic of degree.
The content of the invention
In view of the shortcomings of the prior art, it is an object of the invention to provide a kind of formaldehydeless flame-retardant plywood and its preparation side
Method, by being applied in combination for polyvinyl alcohol and chlorine oxygen magnesium, the glued board for having reached production by cold-press process has fabulous thing
Manage mechanical property and formaldehydeless, fire-retardant, intensity is high and with pliability, the performance of insect prevention.
In order to achieve the above object, the technical solution adopted by the present invention is to provide a kind of formaldehydeless flame-retardant plywood and its system
Preparation Method, its moulding material is the combination of polyvinyl alcohol, magnesia, magnesium chloride, the veneer of rounding or veneer and glass magnesium board,
Small powder is foaming agent, diffusant and modifying agent
The novel environment friendly glued board of production can be widely used for ship, high ferro, Furniture manufacturing, furnishing fields and floor base material.
A kind of formaldehydeless flame-retardant plywood and preparation method thereof, technical scheme is, is mixed using following raw material.It is former
Expect that title and weight difference are as follows:Polyvinyl alcohol 10%, magnesia 50% -60%, magnesium chloride 25% -35%, small powder is 5%.Assembly
Expect to combine with glass magnesium board for the veneer or veneer of rounding.
The preparation method of above-mentioned formaldehydeless flame-retardant plywood, its step is as follows:
(1)It is put into after pure water that 2 times of amounts are added in magnesium chloride fully to be diluted into generation solution left standstill 24 hours for it in reactor
Heating stirring temperature be slowly added at 30 DEG C or so polyvinyl alcohol addition be solution 10% progressively temperature raising polyvinyl alcohol is complete
After dissolving entirely, cooling generation glue.
(2)Technical scheme requires that magnesia fineness is 180-200 mesh.
(3)The veneer natural drying of technical scheme rounding or drying.Thickness as needed it is controllable 1.70mm-
3.6mm.Glass magnesium board determines thickness in 3mm -12mm according to the thickness and requirement of produced plate.
(4)The glue of generation is put into mixer, magnesia and small powder are added while stirring.It is sufficiently stirred for speed control
At 500 revs/min, time control formed pasty material at 8-12 minutes.
(5)Pasty material is poured into glue machine and leads to gluing machine by veneer cloth glue layer by layer, it is horizontal, vertical according to the normal configuration of glued board
Alternating assembly.Can be entirely with veneer assembly also with veneer and glass magnesium board assembly.
(6)Send into 180-200 tons of cold presses and shape about 6 hours after assembly.
(7)Blanket is sent into baking room after sizing and dried, baking room temperature control is between 40-50 DEG C.About 6 hours
Take out.
(8)Blanket is processed further again.Step is as follows:Scrape putty, sanding, go-on-go, above, hot pressing, saw side, inspection conjunction
It is finished product after lattice.
Glued board glue produced by the invention is completely different with glue formula combination with existing plywood production.Production technology
The glued board produced now for cold moudling is hot-forming.
Compared with existing plywood production glue and technique, the present invention is changed by adhesive Combination nova and production technology
Enter, substantially increase the bonding strength of glued board and possess pliability, formaldehydeless, fire-retardant and insect prevention good characteristic, with excellent
Good anti-folding, shock resistance, heat-insulated, insulation and low-shrinkage energy, the combination property with better than various wood-based plates.
Formaldehyde and radioactive element are free of in novel environment friendly glued board, in production process because using cold-press process so not producing
Raw waste gas.Therefore it is new green environment protection section bar material.With fabulous physical and mechanical property.
The novel environment friendly glued board of production can be widely used for ship, high ferro, Furniture manufacturing, furnishing fields and floor base material.
Embodiment
With reference to specific embodiment, the present invention is further detailed explanation, and following examples are only enumerated schematically
Several effects with the explanation that lays down a definition, but and be not belonging to limitation of the invention further.
Embodiment one:A kind of formaldehydeless flame-retardant plywood, including flaggy, the flaggy are the veneer of rounding, described
Adhesive layer is equipped between the surface of veneer and plate and plate, the adhesive layer includes magnesia, magnesium chloride and polyvinyl alcohol,
Wherein, the content of magnesia is 55% in the adhesive layer, and the content of the magnesium chloride is 35%, and the content of the polyvinyl alcohol is
10%。
Above-mentioned formaldehydeless flame-retardant plywood preparation method is as follows:
The first step:The veneer natural drying of technical scheme rounding or drying, thickness as needed it is controllable 1.70mm-
3.6mm。
Second step:It is put into after pure water that 2 times of amounts are added in magnesium chloride fully to be diluted into generation solution left standstill 24 hours for it
Progressively temperature raising will be poly- for heating stirring temperature is slowly added into that polyvinyl alcohol addition is solution at 30 DEG C or so in reactor 10%
After vinyl alcohol dissolves completely, cooling generation glue.
3rd step:The glue of generation is put into mixer, the magnesia that fineness is 180-200 mesh is added while stirring,
Speed control is sufficiently stirred at 500 revs/min, time control formed pasty material at 8-12 minutes.
4th step:Pasty material is poured into glue machine and leads to gluing machine by veneer cloth glue layer by layer, according to the normal configuration of glued board
Horizontal, vertical alternately assembly, wherein using veneer assembly entirely.
5th step:Send into 180-200 tons of cold presses and shape about 6 hours after assembly.
6th step:Blanket is sent into baking room after sizing and dried, baking room temperature control is between 40-50 DEG C, about 6
Hour takes out.
7th step:Blanket is processed further again, comprised the following steps that:Scrape putty, sanding, go-on-go, above, hot pressing, saw
Side, after the assay was approved be finished product.
Embodiment two:A kind of formaldehydeless flame-retardant plywood, including flaggy, the flaggy are the veneer of rounding, described
Adhesive layer is equipped between the surface of veneer and plate and plate, the adhesive layer includes magnesia, magnesium chloride and polyvinyl alcohol,
Wherein, the content of magnesia is 55% in the adhesive layer, and the content of the magnesium chloride is 32%, and the content of the polyvinyl alcohol is
8%, small powder is additionally provided with the adhesive layer, the small powder is foaming agent in foaming agent, diffusant and modifying agent, the small powder
Content be 1%, the content of diffusant is 1%, and the content of modifying agent is 3%.
The foaming agent is polyurethane foams.
The diffusant is silica.
The modifying agent is titanate coupling agent.
Above-mentioned formaldehydeless flame-retardant plywood preparation method is as follows:
The first step:The veneer natural drying of technical scheme rounding or drying, thickness as needed it is controllable 1.70mm-
3.6mm。
Second step:It is put into after pure water that 2 times of amounts are added in magnesium chloride fully to be diluted into generation solution left standstill 24 hours for it
Progressively temperature raising will be poly- for heating stirring temperature is slowly added into that polyvinyl alcohol addition is solution at 30 DEG C or so in reactor 10%
After vinyl alcohol dissolves completely, cooling generation glue.
3rd step:The glue of generation is put into mixer, the magnesia that fineness is 180-200 mesh is added while stirring
And small powder, speed control is sufficiently stirred at 500 revs/min, and time control formed pasty material at 8-12 minutes.
4th step:Pasty material is poured into glue machine and leads to gluing machine by veneer cloth glue layer by layer, according to the normal configuration of glued board
Horizontal, vertical alternately assembly, wherein using veneer assembly entirely.
5th step:Send into 180-200 tons of cold presses and shape about 6 hours after assembly.
6th step:Blanket is sent into baking room after sizing and dried, baking room temperature control is between 40-50 DEG C, about 6
Hour takes out.
7th step:Blanket is processed further again, comprised the following steps that:Scrape putty, sanding, go-on-go, above, hot pressing, saw
Side, after the assay was approved be finished product.
Embodiment three:A kind of formaldehydeless flame-retardant plywood, including flaggy, the flaggy are the veneer of rounding, described
Adhesive layer is equipped between the surface of veneer and plate and plate, the adhesive layer includes magnesia, magnesium chloride and polyvinyl alcohol,
Wherein, the content of magnesia is 40% in the adhesive layer, and the content of the magnesium chloride is 30%, and the content of the polyvinyl alcohol is
25%, also added with small powder in the adhesive layer, the small powder is foaming agent in foaming agent, diffusant and modifying agent, the small powder
Content be 2%, the content of diffusant is 2%, and the content of modifying agent is 1%.
The foaming agent is polyurethane foams.
The diffusant is silica.
The modifying agent is silane coupler.
Above-mentioned formaldehydeless flame-retardant plywood preparation method is as follows:
The first step:The veneer natural drying of technical scheme rounding or drying, thickness as needed it is controllable 1.70mm-
3.6mm。
Second step:It is put into after pure water that 2 times of amounts are added in magnesium chloride fully to be diluted into generation solution left standstill 24 hours for it
Progressively temperature raising will be poly- for heating stirring temperature is slowly added into that polyvinyl alcohol addition is solution at 30 DEG C or so in reactor 10%
After vinyl alcohol dissolves completely, cooling generation glue.
3rd step:The glue of generation is put into mixer, the magnesia that fineness is 180-200 mesh is added while stirring
And small powder, speed control is sufficiently stirred at 500 revs/min, and time control formed pasty material at 8-12 minutes.
4th step:Pasty material is poured into glue machine and leads to gluing machine by veneer cloth glue layer by layer, according to the normal configuration of glued board
Horizontal, vertical alternately assembly, wherein using veneer assembly entirely.
5th step:Send into 180-200 tons of cold presses and shape about 6 hours after assembly.
6th step:Blanket is sent into baking room after sizing and dried, baking room temperature control is between 40-50 DEG C, about 6
Hour takes out.
7th step:Blanket is processed further again, comprised the following steps that:Scrape putty, sanding, go-on-go, above, hot pressing, saw
Side, after the assay was approved be finished product.
Example IV:A kind of formaldehydeless flame-retardant plywood, including flaggy, the flaggy are the veneer and glass magnesium of rounding
Plate is combined, and is equipped with adhesive layer between the surface of the plate and plate and plate, the adhesive layer include magnesia, magnesium chloride and
Polyvinyl alcohol, wherein, the content of magnesia is 40% in the adhesive layer, and the content of the magnesium chloride is 45%, the polyethylene
The content of alcohol is 15%.
The veneer passes through cold moudling with glass magnesium board.
Above-mentioned formaldehydeless flame-retardant plywood preparation method is as follows:
The first step:The veneer of technical scheme rounding and glass magnesium board natural drying or drying, thickness as needed it is controllable
1.70mm -3.6mm, glass magnesium board determines thickness in 3mm -12mm according to the thickness and requirement of produced plate.
Second step:It is put into after pure water that 2 times of amounts are added in magnesium chloride fully to be diluted into generation solution left standstill 24 hours for it
Progressively temperature raising will be poly- for heating stirring temperature is slowly added into that polyvinyl alcohol addition is solution at 30 DEG C or so in reactor 10%
After vinyl alcohol dissolves completely, cooling generation glue.
3rd step:The glue of generation is put into mixer, the magnesia that fineness is 180-200 mesh is added while stirring,
Speed control is sufficiently stirred at 500 revs/min, time control formed pasty material at 8-12 minutes.
4th step:Pasty material is poured into glue machine and leads to gluing machine by veneer and the flaggy of glass magnesium board cloth glue layer by layer, according to glue
The normal configuration of plywood is horizontal, vertical alternately assembly, from veneer and glass magnesium board assembly.
5th step:Send into 180-200 tons of cold presses and shape about 6 hours after assembly.
6th step:Blanket is sent into baking room after sizing and dried, baking room temperature control is between 40-50 DEG C, about 6
Hour takes out.
7th step:Blanket is processed further again, comprised the following steps that:Scrape putty, sanding, go-on-go, above, hot pressing, saw
Side, after the assay was approved be finished product.
Embodiment five:A kind of formaldehydeless flame-retardant plywood, including flaggy, the flaggy are the veneer and glass magnesium of rounding
Plate is combined, and is equipped with adhesive layer between the surface of the plate and plate and plate, the adhesive layer include magnesia, magnesium chloride and
Polyvinyl alcohol, wherein, the content of magnesia is 65% in the adhesive layer, and the content of the magnesium chloride is 22%, the polyethylene
The content of alcohol is 8%, is additionally provided with small powder in the adhesive layer, and the small powder is foaming agent, diffusant and modifying agent, described small
The content of foaming agent is 1% in material, and the content of diffusant is 3%, and the content of modifying agent is 1%.
The foaming agent is polyurethane foams.
The diffusant is silica.
The modifying agent is stearic acid.
The veneer passes through cold moudling with glass magnesium board.
Above-mentioned formaldehydeless flame-retardant plywood preparation method is as follows:
The first step:The veneer of technical scheme rounding and glass magnesium board natural drying or drying, thickness as needed it is controllable
1.70mm -3.6mm, glass magnesium board determines thickness in 3mm -12mm according to the thickness and requirement of produced plate.
Second step:It is put into after pure water that 2 times of amounts are added in magnesium chloride fully to be diluted into generation solution left standstill 24 hours for it
Progressively temperature raising will be poly- for heating stirring temperature is slowly added into that polyvinyl alcohol addition is solution at 30 DEG C or so in reactor 8%
After vinyl alcohol dissolves completely, cooling generation glue.
3rd step:The glue of generation is put into mixer, the magnesia that fineness is 180-200 mesh is added while stirring
And small powder, speed control is sufficiently stirred at 500 revs/min, and time control formed pasty material at 8-12 minutes.
4th step:Pasty material is poured into glue machine and leads to gluing machine by veneer and the flaggy of glass magnesium board cloth glue layer by layer, according to glue
The normal configuration of plywood is horizontal, vertical alternately assembly, from veneer and glass magnesium board assembly.
5th step:Send into 180-200 tons of cold presses and shape about 6 hours after assembly.
6th step:Blanket is sent into baking room after sizing and dried, baking room temperature control is between 40-50 DEG C, about 6
Hour takes out.
7th step:Blanket is processed further again, comprised the following steps that:Scrape putty, sanding, go-on-go, above, hot pressing, saw
Side, after the assay was approved be finished product.
Embodiment six:A kind of formaldehydeless flame-retardant plywood, including flaggy, the flaggy are the veneer and glass magnesium of rounding
Plate is combined, and is equipped with adhesive layer between the surface of the plate and plate and plate, the adhesive layer include magnesia, magnesium chloride and
Polyvinyl alcohol, wherein, the content of magnesia is 47% in the adhesive layer, and the content of the magnesium chloride is 28%, the polyethylene
The content of alcohol is 15%, is additionally provided with small powder in the adhesive layer, and the small powder is foaming agent, diffusant and modifying agent, described small
The content of foaming agent is 3% in material, and the content of diffusant is 3%, and the content of modifying agent is 4%.
The foaming agent is polyurethane foams.
The diffusant is silica.
The modifying agent is silane coupler.
The veneer passes through cold moudling with glass magnesium board.
Above-mentioned formaldehydeless flame-retardant plywood preparation method is as follows:
The first step:The veneer of technical scheme rounding and glass magnesium board natural drying or drying, thickness as needed it is controllable
1.70mm -3.6mm, glass magnesium board determines thickness in 3mm -12mm according to the thickness and requirement of produced plate.
Second step:It is put into after pure water that 2 times of amounts are added in magnesium chloride fully to be diluted into generation solution left standstill 24 hours for it
Progressively temperature raising will be poly- for heating stirring temperature is slowly added into that polyvinyl alcohol addition is solution at 30 DEG C or so in reactor 10%
After vinyl alcohol dissolves completely, cooling generation glue.
3rd step:The glue of generation is put into mixer, the magnesia that fineness is 180-200 mesh is added while stirring
And small powder, speed control is sufficiently stirred at 500 revs/min, and time control formed pasty material at 8-12 minutes.
4th step:Pasty material is poured into glue machine and leads to gluing machine by veneer and the flaggy of glass magnesium board cloth glue layer by layer, according to glue
The normal configuration of plywood is horizontal, vertical alternately assembly, from veneer and glass magnesium board assembly.
5th step:Send into 180-200 tons of cold presses and shape about 6 hours after assembly.
6th step:Blanket is sent into baking room after sizing and dried, baking room temperature control is between 40-50 DEG C, about 6
Hour takes out.
7th step:Blanket is processed further again, comprised the following steps that:Scrape putty, sanding, go-on-go, above, hot pressing, saw
Side, after the assay was approved be finished product.
The formaldehydeless flame-retardant plywood that the present invention is provided achieved compared with the common glued board of in the market, in many-side and
Significant to improve, its specific effect is as follows:
Formaldehyde | Bonding strength | Pliability | Fire-retardant rate | Insect prevention | Shock resistance | It is heat-insulated | Moisturizing | Shrinkage factor |
Nothing | 96% | 91% | 92% | 90% | 93% | 95% | 90% | 91% |
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment be it is exemplary,
It is not considered as limiting the invention, one of ordinary skill in the art is in the principle for not departing from the present invention and the situation of objective
Under above-described embodiment can be changed within the scope of the invention, change, replace and modification, it is simply combined
Change is all classified as within the protection of the present invention.
Claims (8)
1. a kind of formaldehydeless flame-retardant plywood, including flaggy, it is characterised in that:The flaggy is veneer or veneer and glass magnesium board
Combination, is provided with adhesive layer between the veneer or glass magnesium board, the adhesive layer includes magnesia, magnesium chloride and polyvinyl alcohol,
Also added with small powder in the adhesive layer, the small powder is the one or more in foaming agent, diffusant and modifying agent.
2. formaldehydeless flame-retardant plywood according to claim 1, it is characterised in that:The foaming agent is polyurethane foam
Agent.
3. formaldehydeless flame-retardant plywood according to claim 1, it is characterised in that:The diffusant is silica.
4. formaldehydeless flame-retardant plywood according to claim 1, it is characterised in that:The modifying agent be silane coupler,
One kind in titanate coupling agent, aluminate coupling agent and stearic acid.
5. formaldehydeless flame-retardant plywood according to claim 1, it is characterised in that:The veneer passes through cold pressing with glass magnesium board
Shaping.
6. formaldehydeless flame-retardant plywood according to claim 1, it is characterised in that:The content of magnesia in the adhesive layer
For 40%-65%, the content of the magnesium chloride is 25%-45%, and the content of the polyvinyl alcohol is 8%-25%.
7. formaldehydeless flame-retardant plywood according to claim 1, it is characterised in that:The content of foaming agent is in the small powder
1%-3%, the content of diffusant is 1%-2%, and the content of modifying agent is 1%-5%.
8. a kind of preparation method of formaldehydeless flame-retardant plywood, it is characterised in that:Comprise the following steps:
The first step:The veneer natural drying of technical scheme rounding or drying, thickness as needed it is controllable 1.70mm-
3.6mm, glass magnesium board determines thickness in 3mm -12mm according to the thickness and requirement of produced plate;
Second step:Reaction is put into after pure water that 2 times of amounts are added in magnesium chloride fully to be diluted into generation solution left standstill 24 hours for it
Heating stirring temperature is slowly added into that polyvinyl alcohol addition is solution at 30 DEG C or so in kettle 2% progressively temperature raising by polyethylene
After alcohol dissolves completely, cooling generation glue;
3rd step:The glue of generation is put into mixer, fineness is added while stirring for the magnesia of 180-200 mesh and small
Material, is sufficiently stirred for speed control at 500 revs/min, time control formed pasty material at 8-12 minutes;
4th step:Pasty material is poured into glue machine and leads to gluing machine by veneer cloth glue layer by layer, it is horizontal, vertical according to the normal configuration of glued board
Alternately assembly, can also use veneer and glass magnesium board assembly with veneer assembly entirely;
5th step:Send into 180-200 tons of cold presses and shape about 6 hours after assembly;
6th step:Blanket is sent into baking room after sizing and dried, baking room temperature control is between 40-50 DEG C, about 6 hours
Take out;
7th step:Blanket is processed further again, comprised the following steps that:Scrape putty, sanding, go-on-go, above, hot pressing, saw side, inspection
Test qualified rear for finished product.
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Cited By (4)
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CN107325785A (en) * | 2017-08-21 | 2017-11-07 | 含山县茂盛胶合板厂 | A kind of glued board with electro-magnetic screen function |
CN109337615A (en) * | 2018-10-15 | 2019-02-15 | 烟台市宝翔木业有限公司 | For fire-retardant cold pressing glue in Wood-based Panel Production and preparation method thereof and application method |
CN113696287A (en) * | 2021-09-13 | 2021-11-26 | 连云港森福木业有限公司 | Formaldehyde-free flame-retardant plywood and preparation method and device thereof |
CN113733285A (en) * | 2021-09-07 | 2021-12-03 | 广西贵港市恒久木业有限公司 | Fireproof formaldehyde-free plywood and manufacturing method thereof |
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CN109337615A (en) * | 2018-10-15 | 2019-02-15 | 烟台市宝翔木业有限公司 | For fire-retardant cold pressing glue in Wood-based Panel Production and preparation method thereof and application method |
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