CN107082958A - A kind of anti-fire door core board and fire resisting timber door - Google Patents
A kind of anti-fire door core board and fire resisting timber door Download PDFInfo
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- CN107082958A CN107082958A CN201710410482.1A CN201710410482A CN107082958A CN 107082958 A CN107082958 A CN 107082958A CN 201710410482 A CN201710410482 A CN 201710410482A CN 107082958 A CN107082958 A CN 107082958A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
- E06B3/70—Door leaves
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
- E06B5/10—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes
- E06B5/16—Fireproof doors or similar closures; Adaptations of fixed constructions therefor
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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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
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
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Abstract
The invention discloses a kind of anti-fire door core board and fire resisting timber door, anti-fire door core board includes following raw material by weight：10 20 parts of chitosan, 5 15 parts of magnesium aluminate spinel, modified 15 25 parts of silica flour, 48 parts of sepiolite, 37 parts of ammonium metavanadate, 24 parts of zirconium tetrafluoride, 48 parts of sodium borohydride, 26 parts of polyvinyl chloride, 5 15 parts of andalusite powder, 10 20 parts of nano silicon, 46 parts of hydroquinones, 35 parts of polyvinyl acetate, 24 parts of decabromodiphenyl oxide, 15 25 parts of polypropylene fibre, 57 parts of starch Sodium Octenyl Succinate, 8 12 parts of mica powder, 15 parts of fire proofing additive, 15 parts of antimitotic agent, 13 parts of water reducer, 13 parts of hydrophober.Its preparation method is to mix raw material to crush, and passes through melting and shaping afterwards, you can, the anti-fire door core board is between fire resisting timber door panel and backboard.The anti-fire door core board low production cost of the present invention, light weight intensity is high, and excellent fireproof performance, heat preservation and soundproof is good, and the fire resisting timber door preparation technology being made using the anti-fire door core board is simple, and large-scale production can be achieved.
Description
Technical field
The invention belongs to timber manufacture field, and in particular to a kind of anti-fire door core board and fire resisting timber door.
Background technology
Anti-fire door core board is a key raw material in Fireproof door structure, the quality of fire resistant doorsets performance, largely
On be decided by the performance and quality of door panel.But up to this point, the country is directed to the relevant criterion of anti-fire door core board still
Blank, manufacturing enterprise follow simply《Fire resistant doorsets GB12955-2008》In to several of fire resistant doorsets packing material descriptions, except material
Material must is fulfilled for flammability non-ignitable (A1 grades) and two mandatory conditions of flue gas toxity AQ1, and material needs to meet environmental requirement, made
With outside degradation material, this, which causes door panel to give birth to, is not provided to more materials and physical and chemical index, technic index clearly
There is larger operable space in production enterprise in product standard and quality control standard, cause in industry product it is very different,
Shoddy phenomenon generally existing.
At present, can substantially meet the door core material of fire resistant doorsets quality and manufacturing technique requirent mainly has following several：
First, expanded perlite sheet material, i.e., from Conventional insulation expanded perlite granule, by selecting suitably gluing
Agent, takes cold heat press high-pressure moulding process to be made, and by the adjustment of adhesive formulation and compression factor, can obtain good
Good heat-insulated and flashback performance, burning shrinkage rate and quality burn tinctuer are relatively low, are a kind of fire-resistant door core materials of better performances.But by
High in raw material cost of transportation, supply is limited, in addition complex manufacturing, is difficult to realize mechanization and pile line operation,
Production capacity is low, therefore in addition to some northern areas, most fire resistant doorsets enterprises are not widely used；
2nd, magnesite fire-proof door panel, magnesite material is a kind of low-carbon environment-friendly, environment-friendly inorganic material, and its is excellent
Material property and processing characteristics make it be had a wide range of applications in building materials field, include Dai Mu, Dai Shi of rising in recent years
The industry such as decoration and environmental type building, none be not using magnesite is high-strength, fire resisting, corrosion resistant, anti-mould and anti-moth, easy processing,
It is pollution-free to wait good characteristic.Magnesite material adds chemically or physically foaming agent and produces microvesicle, by mould or concora crush moulding process,
The light weight board of all size variable thickness is can be made into, density can reach fire resistant doorsets quality in 290~450 kilograms/cubic metre
And application requirement, domestic majority fire resistant doorsets manufacturing enterprises are used as fire-resistant door core material from it.Magnesite fire-proof door panel former material
Expect abundance, cheap, technology is relatively easily grasped, can be by mechanization production line balance, energy production potential is big,
Produce integrated cost low, be the door core material of a kind of more most market prospects and competitiveness.But magnesite is appeared in for a long time
Quality problem on foaming door panel is concentrated mainly on the following aspects：(1) return halogen to get damp, corrosion door-plate；(2) plate body powder
Change, argillization, strength retrogression；(3) water imbibition is strong, eats glue seriously, causes to be increased with glue cost, or even door-plate degumming hollowing occur；
(4) fire resistance is poor, and core quality burn tinctuer is too high, causes fire resistant doorsets to be examined and does not reach the requirement of fire resisting time limit.It is therefore desirable to have
Necessity improves to this.
The content of the invention
For problems of the prior art, the invention provides a kind of anti-fire door core board and fire resisting timber door, this kind is prevented
Vent core plate low production cost, light weight intensity is high, and excellent fireproof performance, heat preservation and soundproof is good, uses the anti-fire door core board
The fire resisting timber door preparation technology being made is simple, can be mass-produced.
In order to achieve the above object, the present invention is achieved through the following technical solutions：
A kind of anti-fire door core board, including following raw material by weight：10-20 parts of chitosan, magnesium aluminate spinel 5-15
Part, modified 15-25 part of silica flour, 4-8 parts of sepiolite, 3-7 parts of ammonium metavanadate, 2-4 parts of zirconium tetrafluoride, 4-8 parts of sodium borohydride, gather
2-6 parts of vinyl chloride, 5-15 parts of andalusite powder, 10-20 parts of nano silicon, 4-6 parts of hydroquinones, 3-5 parts of polyvinyl acetate,
2-4 parts of decabromodiphenyl oxide, 15-25 parts of polypropylene fibre, 5-7 parts of starch Sodium Octenyl Succinate, 8-12 parts of mica powder, fire prevention are helped
1-5 parts of agent, 1-5 parts of antimitotic agent, 1-3 parts of water reducer, 1-3 parts of hydrophober；
The preparation technology of the modified silica flour comprises the following steps：
1) silica flour 85-150 DEG C of preheating and drying 1-2 hours in drying box are weighed, addition accounts for silica flour mass percent
8-12% 25% ammonia spirit, stirs 2-3 hours at 65-75 DEG C, filters out silica flour, dries；
2) its quality 3-5% coupling agent is added into dried silica flour again, is stirred 3-4 hours at 55-65 DEG C,
Filter out silica flour；
3) silica flour that finally will filter out is delivered in vacuum drying chamber, is 0.05-0.1Mpa, 90-100 in vacuum
Silica flour must be modified under conditions of DEG C after dry heat 2-3 hours.
Further, this kind of anti-fire door core board includes following raw material by weight：15 parts of chitosan, magnesium aluminate spinel
10 parts, modified 20 parts of silica flour, 6 parts of sepiolite, 5 parts of ammonium metavanadate, 3 parts of zirconium tetrafluoride, 6 parts of sodium borohydride, polyvinyl chloride 4
Part, 10 parts of andalusite powder, 15 parts of nano silicon, 5 parts of hydroquinones, 4 parts of polyvinyl acetate, 3 parts of decabromodiphenyl oxide, poly- third
20 parts of alkene fiber, 6 parts of starch Sodium Octenyl Succinate, 10 parts of mica powder, 3 parts of fire proofing additive, 3 parts of antimitotic agent, 2 parts of water reducer,
2 parts of hydrophober.
Preferably, the fire proofing additive is antimony trichloride, amine sulfate, magnesium hydroxide, ammonium dihydrogen phosphate or diammonium hydrogen phosphate
In one or more.
Preferably, the antimitotic agent is lignocellulosic.
Preferably, the water reducer is the one or more in calcium lignosulfonate, Sodium Polyacrylate, sulfamic acid sodium.
Preferably, the hydrophober is organic silicon emulsion.
Further, the preparation method of the anti-fire door core board is to mix whole raw materials to be crushed to by ball mill
Particle diameter≤4-6mm, is delivered in smelting furnace is smelted into molten condition afterwards, and finally material is delivered in mould and is cooled and shaped,
.
A kind of fire resisting timber door using the anti-fire door core board, the fire resisting timber door also includes panel and backboard, the fire prevention
Door panel is located between panel and door core.
The present invention has the advantages that：
(1) extensively, cost is low for anti-fire door core board raw material sources of the invention, prepares simply, uses the anti-fire door core board system
Into fire resisting timber door processing technology it is easy, non-pollution discharge, environmental protection；
(2) its internal vesicular texture of anti-fire door core board of the invention so that its fire resistance is strong, heat preservation and soundproof performance
Good, resistance to compression and High anti bending strength, density are low, light weight, and service life is long.
Embodiment
The embodiment of the present invention is further described with reference to embodiment, following examples are only used for more
Technical scheme is clearly demonstrated, and can not be limited the scope of the invention with this.
Embodiment 1
A kind of anti-fire door core board, weighs following raw material：Chitosan 10kg, magnesium aluminate spinel 5kg, modified silica flour 15kg,
Sepiolite 4kg, ammonium metavanadate 3kg, zirconium tetrafluoride 2kg, sodium borohydride 4kg, polyvinyl chloride 2kg, andalusite powder 5kg, nanometer two
Silica 10kg, hydroquinones 4kg, polyvinyl acetate 3kg, decabromodiphenyl oxide 2kg, polypropylene fibre 15kg, octenyl succinic
Acid-starch sodium 5kg, mica powder 8kg, fire proofing additive 1kg, antimitotic agent 1kg, water reducer 1kg, hydrophober 1kg；
The preparation technology of the modified silica flour comprises the following steps：
1) 15kg silica flours 85 DEG C of preheating and dryings 1 hour in drying box is weighed, addition accounts for silica flour mass percent 8%
25% ammonia spirit, at 65 DEG C stir 2 hours, filter out silica flour, dry；
2) coupling agent of its quality 3% is added into dried silica flour again, stirs 3 hours, filters out at 55 DEG C
Silica flour；
3) silica flour that finally will filter out is delivered in vacuum drying chamber, is 0.05Mpa, 90 DEG C of condition in vacuum
Lower dry heat must be modified silica flour after 2 hours.
Wherein, above-mentioned fire proofing additive uses ammonium dihydrogen phosphate；Antimitotic agent uses lignocellulosic；Water reducer uses lignin
Sulfoacid calcium；Hydrophober uses organic silicon emulsion.
The preparation method of above-mentioned anti-fire door core board be by the whole raw materials mix by ball mill be crushed to particle diameter≤
4mm, is delivered in smelting furnace is smelted into molten condition afterwards, and finally material is delivered in mould and is cooled and shaped, that is, this is made
The anti-fire door core board of invention.
Using the fire resisting timber door of above-mentioned anti-fire door core board, in addition to panel and backboard, the anti-fire door core board is located at panel
Between door core.
Embodiment 2
A kind of anti-fire door core board, weighs following raw material：Chitosan 15kg, magnesium aluminate spinel 10kg, modified silica flour 20kg,
Sepiolite 6kg, ammonium metavanadate 5kg, zirconium tetrafluoride 3kg, sodium borohydride 6kg, polyvinyl chloride 4kg, andalusite powder 10kg, nanometer two
Silica 15kg, hydroquinones 5kg, polyvinyl acetate 4kg, decabromodiphenyl oxide 3kg, polypropylene fibre 20kg, octenyl succinic
Acid-starch sodium 6kg, mica powder 10kg, fire proofing additive 3kg, antimitotic agent 3kg, water reducer 2kg, hydrophober 2kg；
The preparation technology of the modified silica flour comprises the following steps：
1) 20kg silica flours 120 DEG C of preheating and dryings 1.5 hours in drying box are weighed, addition accounts for silica flour mass percent
10% 25% ammonia spirit, stirs 2.5 hours at 70 DEG C, filters out silica flour, dries；
2) coupling agent of its quality 4% is added into dried silica flour again, is stirred 3.5 hours at 60 DEG C, filtering
Go out silica flour；
3) silica flour that finally will filter out is delivered in vacuum drying chamber, is 0.08Mpa, 95 DEG C of condition in vacuum
Lower dry heat must be modified silica flour after 2.5 hours.
Wherein, above-mentioned fire proofing additive uses antimony trichloride, and three kinds of amine sulfate and diammonium hydrogen phosphate are between mixture, and three
Mass ratio be 1:1:2；Antimitotic agent uses lignocellulosic；Water reducer is using the two kinds of mixing of Sodium Polyacrylate and sulfamic acid sodium
Thing, and mass ratio between the two is 1:1；Hydrophober uses organic silicon emulsion.
The preparation method of above-mentioned anti-fire door core board be by the whole raw materials mix by ball mill be crushed to particle diameter≤
5mm, is delivered in smelting furnace is smelted into molten condition afterwards, and finally material is delivered in mould and is cooled and shaped, that is, this is made
The anti-fire door core board of invention.
Using the fire resisting timber door of above-mentioned anti-fire door core board, in addition to panel and backboard, the anti-fire door core board is located at panel
Between door core.
Embodiment 3
A kind of anti-fire door core board, weighs following raw material：Chitosan 20kg, magnesium aluminate spinel 15kg, modified silica flour 25kg,
Sepiolite 8kg, ammonium metavanadate 7kg, zirconium tetrafluoride 4kg, sodium borohydride 8kg, polyvinyl chloride 6kg, andalusite powder 15kg, nanometer two
Silica 20kg, hydroquinones 6kg, polyvinyl acetate 5kg, decabromodiphenyl oxide 4kg, polypropylene fibre 25kg, octenyl succinic
Acid-starch sodium 7kg, mica powder 12kg, fire proofing additive 5kg, antimitotic agent 5kg, water reducer 3kg, hydrophober 3kg；
The preparation technology of the modified silica flour comprises the following steps：
1) 25kg silica flours 150 DEG C of preheating and dryings 2 hours in drying box are weighed, addition accounts for silica flour mass percent
12% 25% ammonia spirit, stirs 3 hours at 75 DEG C, filters out silica flour, dries；
2) coupling agent of its quality 5% is added into dried silica flour again, stirs 4 hours, filters out at 65 DEG C
Silica flour；
3) silica flour that finally will filter out is delivered in vacuum drying chamber, is 0.1Mpa, 100 DEG C of condition in vacuum
Lower dry heat must be modified silica flour after 3 hours.
Wherein, above-mentioned fire proofing additive uses two kinds of mixtures of magnesium hydroxide and diammonium hydrogen phosphate, and quality between the two
Than for 1:1；Antimitotic agent uses lignocellulosic；Water reducer uses sulfamic acid sodium；Hydrophober uses organic silicon emulsion.
The preparation method of above-mentioned anti-fire door core board be by the whole raw materials mix by ball mill be crushed to particle diameter≤
6mm, is delivered in smelting furnace is smelted into molten condition afterwards, and finally material is delivered in mould and is cooled and shaped, that is, this is made
The anti-fire door core board of invention.
Using the fire resisting timber door of above-mentioned anti-fire door core board, in addition to panel and backboard, the anti-fire door core board is located at panel
Between door core.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, although with reference to foregoing reality
Apply example the present invention is described in detail, for those skilled in the art, it still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic.All essences in the present invention
God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (8)
1. a kind of anti-fire door core board, it is characterised in that including following raw material by weight：10-20 parts of chitosan, magnalium point
5-15 parts of spar, modified 15-25 parts of silica flour, 4-8 parts of sepiolite, 3-7 parts of ammonium metavanadate, 2-4 parts of zirconium tetrafluoride, sodium borohydride
4-8 parts, 2-6 parts of polyvinyl chloride, 5-15 parts of andalusite powder, 10-20 parts of nano silicon, 4-6 parts of hydroquinones, the sour second of poly-vinegar
3-5 parts of alkene, 2-4 parts of decabromodiphenyl oxide, 15-25 parts of polypropylene fibre, 5-7 parts of starch Sodium Octenyl Succinate, mica powder 8-12
Part, 1-5 parts of fire proofing additive, 1-5 parts of antimitotic agent, 1-3 parts of water reducer, 1-3 parts of hydrophober；
The preparation technology of the modified silica flour comprises the following steps：
1) silica flour 85-150 DEG C of preheating and drying 1-2 hours in drying box are weighed, addition accounts for silica flour mass percent 8-
12% 25% ammonia spirit, stirs 2-3 hours at 65-75 DEG C, filters out silica flour, dries；
2) its quality 3-5% coupling agent is added into dried silica flour again, is stirred 3-4 hours at 55-65 DEG C, filtering
Go out silica flour；
3) silica flour that finally will filter out is delivered in vacuum drying chamber, is 0.05-0.1Mpa in vacuum, 90-100 DEG C
Under the conditions of dry heat must be modified silica flour after 2-3 hours.
2. anti-fire door core board according to claim 1, it is characterised in that including following raw material by weight：Shell gathers
15 parts of sugar, 10 parts of magnesium aluminate spinel, modified 20 parts of silica flour, 6 parts of sepiolite, 5 parts of ammonium metavanadate, 3 parts of zirconium tetrafluoride, hydroboration
6 parts of sodium, 4 parts of polyvinyl chloride, 10 parts of andalusite powder, 15 parts of nano silicon, 5 parts of hydroquinones, 4 parts of polyvinyl acetate, ten
3 parts of bromo biphenyl ether, 20 parts of polypropylene fibre, 6 parts of starch Sodium Octenyl Succinate, 10 parts of mica powder, 3 parts of fire proofing additive, cracking resistance
3 parts of agent, 2 parts of water reducer, 2 parts of hydrophober.
3. anti-fire door core board according to claim 1, it is characterised in that the fire proofing additive is antimony trichloride, amine sulfate,
One or more in magnesium hydroxide, ammonium dihydrogen phosphate or diammonium hydrogen phosphate.
4. anti-fire door core board according to claim 1, it is characterised in that the antimitotic agent is lignocellulosic.
5. anti-fire door core board according to claim 1, it is characterised in that the water reducer is calcium lignosulfonate, poly- third
One or more in olefin(e) acid sodium, sulfamic acid sodium.
6. anti-fire door core board according to claim 1, it is characterised in that the hydrophober is organic silicon emulsion.
7. anti-fire door core board according to claim 1, it is characterised in that the preparation method of the anti-fire door core board is by institute
State whole raw materials mixings and particle diameter≤4-6mm is crushed to by ball mill, be delivered in smelting furnace be smelted into molten condition afterwards, most
Material is delivered in mould afterwards and is cooled and shaped, you can.
8. the fire resisting timber door of a kind of anti-fire door core board using as described in claim 1-7 any one, it is characterised in that described
Fire resisting timber door also includes panel and backboard, and the anti-fire door core board is located between panel and door core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710410482.1A CN107082958A (en) | 2017-06-03 | 2017-06-03 | A kind of anti-fire door core board and fire resisting timber door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710410482.1A CN107082958A (en) | 2017-06-03 | 2017-06-03 | A kind of anti-fire door core board and fire resisting timber door |
Publications (1)
| Publication Number | Publication Date |
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| CN107082958A true CN107082958A (en) | 2017-08-22 |
Family
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|---|---|---|---|
| CN201710410482.1A Withdrawn CN107082958A (en) | 2017-06-03 | 2017-06-03 | A kind of anti-fire door core board and fire resisting timber door |
Country Status (1)
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Cited By (3)
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| CN108162118A (en) * | 2017-12-07 | 2018-06-15 | 常州市日臣艺术装饰材料有限公司 | A kind of preparation method of anti-fire door core board |
| CN112851189A (en) * | 2021-03-05 | 2021-05-28 | 马永胜 | Concrete admixture and preparation method and application thereof |
| CN114801387A (en) * | 2022-05-09 | 2022-07-29 | 四会市宇诚新型材料有限公司 | Fireproof aluminum ceiling and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108162118A (en) * | 2017-12-07 | 2018-06-15 | 常州市日臣艺术装饰材料有限公司 | A kind of preparation method of anti-fire door core board |
| CN112851189A (en) * | 2021-03-05 | 2021-05-28 | 马永胜 | Concrete admixture and preparation method and application thereof |
| CN114801387A (en) * | 2022-05-09 | 2022-07-29 | 四会市宇诚新型材料有限公司 | Fireproof aluminum ceiling and preparation method thereof |
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Application publication date: 20170822 |
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