CN107417243A - A kind of light anion fire resistant doorsets and preparation method thereof - Google Patents
A kind of light anion fire resistant doorsets and preparation method thereof Download PDFInfo
- Publication number
- CN107417243A CN107417243A CN201710819781.0A CN201710819781A CN107417243A CN 107417243 A CN107417243 A CN 107417243A CN 201710819781 A CN201710819781 A CN 201710819781A CN 107417243 A CN107417243 A CN 107417243A
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- Prior art keywords
- parts
- fire resistant
- resistant doorsets
- anion
- door core
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/30—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing magnesium cements or similar cements
- C04B28/32—Magnesium oxychloride cements, e.g. Sorel cement
-
- 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
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/54—Pigments; Dyes
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Special Wing (AREA)
Abstract
The present invention provides a kind of light anion fire resistant doorsets and preparation method thereof, it is related to architectural decoration material field, fire resistant doorsets are the fire prevention isolation facilities as passive type, majority sets corridor gateway and fire escape in public places, because build is heavy indoor using less, and the wooden door that most interiors use does not possess fire-proof function, anion can not be discharged, in view of the shortcomings of the prior art, therefore a kind of light anion fire resistant doorsets and preparation method thereof are invented, including door core, it is characterised in that the door core is made up of the following raw material of mass parts：15 parts, 120 180 grams 3 10 parts of negative ion powder, 20 30 parts of magnesium chloride, 30 40 parts of magnesia, 10 20 parts of silica flour, 5 10 parts of lithopone, 16 parts of perlite, 0.5 2.5 parts of foaming agent, 0.5 3 parts of modifying agent, auxiliary agent specification glass fiber cloths, its advantage is to discharge anion, light quality, decorative effect and wooden door compare favourably, intensity is high, do not ftracture, indeformable can reach the non-ignitable A1 levels of fire prevention.
Description
Technical field
The present invention relates to architectural decoration material field, and in particular to a kind of light anion fire resistant doorsets.
Technical background
Fire resistant doorsets are the fire prevention isolation facilities as passive type, and majority sets corridor gateway and evacuation in public places
Passage, because the heavy indoor use of build is less, and the wooden door that most interiors use does not possess fire-proof function, it is impossible to discharges
Anion, in view of the shortcomings of the prior art, therefore invent a kind of light anion fire resistant doorsets and preparation method thereof, its advantage
It is that can discharge anion, light quality, decorative effect and wooden door compare favourably, intensity is high, do not ftracture, indeformable can reach fire prevention
Non-ignitable A1 levels.
The content of the invention
The present invention is exactly to solve the problems of the prior art, there is provided a kind of light anion fire resistant doorsets and its preparation side
Method.
The technical problems to be solved by the invention are achieved through the following technical solutions.
A kind of light anion fire resistant doorsets, including door core, it is characterised in that the door core by mass parts following raw material group
Into：Negative ion powder 3-10 parts, magnesium chloride 20-30 parts, magnesia 30-40 parts, silica flour 10-20 parts, lithopone 5-10 parts, pearl
Rock 1-6 parts, foaming agent 0.5-2.5 parts, modifying agent 0.5-3 parts, auxiliary agent 1-5 parts, 120-180 grams of specification glass fiber cloth.
Further, a kind of light anion fire resistant doorsets, it is characterised in that the door core by mass parts following original
Material composition：6 parts of negative ion powder, 25 parts of magnesium chloride, 35 parts of magnesia, 15 parts of silica flour, 7 parts of lithopone, 3 parts of perlite, foaming
3 parts, 150 grams 1 part of agent, 1 part of modifying agent, auxiliary agent specification glass fiber cloths.
Further, the preparation method of a kind of light anion fire resistant doorsets, it is characterised in that comprise the following steps：
(1) magnesium chloride is added in speed stirrer and adds little water stirring at low speed 20-40 minutes obtained slurry；
(2) negative ion powder, magnesia, silica flour, lithopone, perlite are added into moderate-speed mixer in speed stirrer
20-40 minutes, add the foaming agent, modifying agent, auxiliary agent and slurry made from this step (1), moderate-speed mixer 40-60 minutes
Plastic type compound is made；
(3) a face decorative cover is put into the mold bottom back side upward, pours gained plastic type compound, it is thick when pouring 1/3
When spending, the glass fabric of 120-180 grams of specification of first layer is laid, 120-180 grams of rule of the second layer are laid when being poured into 2/3 thickness
The glass fabric of lattice, is put into another side decorative cover when being poured into mold plane, down, the door core is made in the back side, then by institute
State Men Xin and be put into hot pressing 2-5 hours in hot press；
(4) door side door core is grouped together and can be prepared by a kind of light anion fire resistant doorsets of the present invention.
Further, the preparation method of a kind of light anion fire resistant doorsets, the hot pressing temperature are 150 DEG C -220
℃。
Further, the preparation method of a kind of light anion fire resistant doorsets, moisture content 7%-11%.
Its advantage of the present invention is：Anion can be discharged, light quality, decorative effect compares favourably with wooden door, intensity
It is high, do not ftracture, indeformable can reach the non-ignitable A1 levels of fire prevention.
Embodiment
Embodiment 1
A kind of light anion fire resistant doorsets of the present embodiment, including door core, it is characterised in that the door core by mass parts with
Lower raw material composition：3 parts of negative ion powder, 30 parts of magnesium chloride, 30 parts of magnesia, 10 parts of silica flour, 5 parts of lithopone, 1 part of perlite,
1 part, 120 grams 0.5 part of foaming agent, 0.5 part of modifying agent, auxiliary agent specification glass fiber cloths.
A kind of preparation method of light anion fire resistant doorsets described in the present embodiment, it is characterised in that comprise the following steps：
(1) magnesium chloride is added and little water 40 minutes obtained slurries of stirring at low speed is added in speed stirrer；
(2) negative ion powder, magnesia, silica flour, lithopone, perlite are added into moderate-speed mixer in speed stirrer
40 minutes, the foaming agent, modifying agent, auxiliary agent and slurry made from this step (1) are added, moderate-speed mixer is made for 60 minutes can
Plastotype compound；
(3) a face decorative cover is put into the mold bottom back side upward, pours gained plastic type compound, it is thick when pouring 1/3
When spending, the glass fabric of 120 grams of specifications of first layer is laid, the glass of 120 grams of specifications of the second layer is laid when being poured into 2/3 thickness
Fiber cloth, is put into another side decorative cover when being poured into mold plane, down, the door core is made, then the Men Xin is put in the back side
Enter hot pressing 2 hours in hot press；
(4) door side door core is grouped together and can be prepared by a kind of light anion fire resistant doorsets of the present invention.
A kind of preparation method of light anion fire resistant doorsets, the hot pressing temperature are 150 DEG C -220 DEG C.
A kind of preparation method of light anion fire resistant doorsets, moisture content 7%-11%.
Embodiment 2
A kind of light anion fire resistant doorsets of the present embodiment, including door core, it is characterised in that the door core by mass parts with
Lower raw material composition：4 parts of negative ion powder, 28 parts of magnesium chloride, 32 parts of magnesia, 11 parts of silica flour, 6 parts of lithopone, 2 parts of perlite,
1.5 parts, 120 grams 0.8 part of foaming agent, 0.8 part of modifying agent, auxiliary agent specification glass fiber cloths.
A kind of preparation method of light anion fire resistant doorsets described in the present embodiment, it is characterised in that comprise the following steps：
(1) magnesium chloride is added and little water 40 minutes obtained slurries of stirring at low speed is added in speed stirrer；
(2) negative ion powder, magnesia, silica flour, lithopone, perlite are added into moderate-speed mixer in speed stirrer
30 minutes, the foaming agent, modifying agent, auxiliary agent and slurry made from this step (1) are added, moderate-speed mixer is made for 55 minutes can
Plastotype compound；
(3) a face decorative cover is put into the mold bottom back side upward, pours gained plastic type compound, it is thick when pouring 1/3
When spending, the glass fabric of 120 grams of specifications of first layer is laid, the glass of 120 grams of specifications of the second layer is laid when being poured into 2/3 thickness
Fiber cloth, is put into another side decorative cover when being poured into mold plane, down, the door core is made, then the Men Xin is put in the back side
Enter hot pressing 2.5 hours in hot press；
(4) door side door core is grouped together and can be prepared by a kind of light anion fire resistant doorsets of the present invention.
A kind of preparation method of light anion fire resistant doorsets, the hot pressing temperature are 150 DEG C -220 DEG C.
A kind of preparation method of light anion fire resistant doorsets, moisture content 7%-11%.
Embodiment 3
A kind of light anion fire resistant doorsets of the present embodiment, including door core, it is characterised in that the door core by mass parts with
Lower raw material composition：5 parts of negative ion powder, 27 parts of magnesium chloride, 33 parts of magnesia, 11 parts of silica flour, 6 parts of lithopone, 3 parts of perlite,
1.5 parts, 130 grams 0.9 part of foaming agent, 0.8 part of modifying agent, auxiliary agent specification glass fiber cloths.
A kind of preparation method of light anion fire resistant doorsets described in the present embodiment, it is characterised in that comprise the following steps：
(1) magnesium chloride is added and little water 40 minutes obtained slurries of stirring at low speed is added in speed stirrer；
(2) negative ion powder, magnesia, silica flour, lithopone, perlite are added into moderate-speed mixer in speed stirrer
35 minutes, the foaming agent, modifying agent, auxiliary agent and slurry made from this step (1) are added, moderate-speed mixer is made for 50 minutes can
Plastotype compound；
(3) a face decorative cover is put into the mold bottom back side upward, pours gained plastic type compound, it is thick when pouring 1/3
When spending, the glass fabric of 130 grams of specifications of first layer is laid, the glass of 130 grams of specifications of the second layer is laid when being poured into 2/3 thickness
Fiber cloth, is put into another side decorative cover when being poured into mold plane, down, the door core is made, then the Men Xin is put in the back side
Enter hot pressing 3 hours in hot press；
(4) door side door core is grouped together and can be prepared by a kind of light anion fire resistant doorsets of the present invention.
A kind of preparation method of light anion fire resistant doorsets, the hot pressing temperature are 150 DEG C -220 DEG C.
A kind of preparation method of light anion fire resistant doorsets, moisture content 7%-11%.
Embodiment 4
A kind of light anion fire resistant doorsets of the present embodiment, including door core, it is characterised in that the door core by mass parts with
Lower raw material composition：6 parts of negative ion powder, 26 parts of magnesium chloride, 34 parts of magnesia, 11 parts of silica flour, 7 parts of lithopone, 4 parts of perlite,
1.5 parts, 150 grams 0.9 part of foaming agent, 1.2 parts of modifying agent, auxiliary agent specification glass fiber cloths.
A kind of preparation method of light anion fire resistant doorsets described in the present embodiment, it is characterised in that comprise the following steps：
(1) magnesium chloride is added and little water 40 minutes obtained slurries of stirring at low speed is added in speed stirrer；
(2) negative ion powder, magnesia, silica flour, lithopone, perlite are added into moderate-speed mixer in speed stirrer
40 minutes, the foaming agent, modifying agent, auxiliary agent and slurry made from this step (1) are added, moderate-speed mixer is made for 50 minutes can
Plastotype compound；
(3) a face decorative cover is put into the mold bottom back side upward, pours gained plastic type compound, it is thick when pouring 1/3
When spending, the glass fabric of 150 grams of specifications of first layer is laid, the glass of 150 grams of specifications of the second layer is laid when being poured into 2/3 thickness
Fiber cloth, is put into another side decorative cover when being poured into mold plane, down, the door core is made, then the Men Xin is put in the back side
Enter hot pressing 3.5 hours in hot press；
(4) door side door core is grouped together and can be prepared by a kind of light anion fire resistant doorsets of the present invention.
A kind of preparation method of light anion fire resistant doorsets, the hot pressing temperature are 160 DEG C -220 DEG C.
A kind of preparation method of light anion fire resistant doorsets, moisture content 7%-10%.
Embodiment 5
A kind of light anion fire resistant doorsets of the present embodiment, including door core, it is characterised in that the door core by mass parts with
Lower raw material composition：7 parts of negative ion powder, 25 parts of magnesium chloride, 30 parts of magnesia, 11 parts of silica flour, 8 parts of lithopone, 4 parts of perlite,
2 parts, 150 grams 1.2 parts of foaming agent, 1.2 parts of modifying agent, auxiliary agent specification glass fiber cloths.
A kind of preparation method of light anion fire resistant doorsets described in the present embodiment, it is characterised in that comprise the following steps：
(1) magnesium chloride is added and little water 40 minutes obtained slurries of stirring at low speed is added in speed stirrer；
(2) negative ion powder, magnesia, silica flour, lithopone, perlite are added into moderate-speed mixer in speed stirrer
50 minutes, the foaming agent, modifying agent, auxiliary agent and slurry made from this step (1) are added, moderate-speed mixer is made for 50 minutes can
Plastotype compound；
(3) a face decorative cover is put into the mold bottom back side upward, pours gained plastic type compound, it is thick when pouring 1/3
When spending, the glass fabric of 150 grams of specifications of first layer is laid, the glass of 150 grams of specifications of the second layer is laid when being poured into 2/3 thickness
Fiber cloth, is put into another side decorative cover when being poured into mold plane, down, the door core is made, then the Men Xin is put in the back side
Enter hot pressing 4 hours in hot press；
(4) door side door core is grouped together and can be prepared by a kind of light anion fire resistant doorsets of the present invention.
A kind of preparation method of light anion fire resistant doorsets, the hot pressing temperature are 160 DEG C -220 DEG C.
A kind of preparation method of light anion fire resistant doorsets, moisture content 6%-10%.
Embodiment 6
A kind of light anion fire resistant doorsets of the present embodiment, including door core, it is characterised in that the door core by mass parts with
Lower raw material composition：8 parts of negative ion powder, 25 parts of magnesium chloride, 32 parts of magnesia, 11 parts of silica flour, 9 parts of lithopone, 4 parts of perlite,
2 parts, 180 grams 1.5 parts of foaming agent, 1.5 parts of modifying agent, auxiliary agent specification glass fiber cloths.
A kind of preparation method of light anion fire resistant doorsets described in the present embodiment, it is characterised in that comprise the following steps：
(1) magnesium chloride is added and little water 40 minutes obtained slurries of stirring at low speed is added in speed stirrer；
(2) negative ion powder, magnesia, silica flour, lithopone, perlite are added into moderate-speed mixer in speed stirrer
40 minutes, the foaming agent, modifying agent, auxiliary agent and slurry made from this step (1) are added, moderate-speed mixer is made for 50 minutes can
Plastotype compound；
(3) a face decorative cover is put into the mold bottom back side upward, pours gained plastic type compound, it is thick when pouring 1/3
When spending, the glass fabric of 180 grams of specifications of first layer is laid, the glass of 180 grams of specifications of the second layer is laid when being poured into 2/3 thickness
Fiber cloth, is put into another side decorative cover when being poured into mold plane, down, the door core is made, then the Men Xin is put in the back side
Enter hot pressing 4.5 hours in hot press；
(4) door side door core is grouped together and can be prepared by a kind of light anion fire resistant doorsets of the present invention.
A kind of preparation method of light anion fire resistant doorsets, the hot pressing temperature are 160 DEG C -210 DEG C.
A kind of preparation method of light anion fire resistant doorsets, moisture content 6%-9%.
Above-described embodiment is only that the description of the invention not makes formal limitation to the present invention, is not departing from this hair
Within the scope of bright technical scheme any technology contents using the disclosure above make simple change etc. equivalent scheme belong to
Protection scope of the present invention.
Claims (5)
1. a kind of light anion fire resistant doorsets, including door core, it is characterised in that the door core is made up of the following raw material of mass parts：
Negative ion powder 3-10 parts, magnesium chloride 20-30 parts, magnesia 30-40 parts, silica flour 10-20 parts, lithopone 5-10 parts, perlite
1-6 parts, foaming agent 0.5-2.5 parts, modifying agent 0.5-3 parts, auxiliary agent 1-5 parts, 120-180 grams of specification glass fiber cloth.
2. a kind of light anion fire resistant doorsets according to claim 1, it is characterised in that the door core is by the following of mass parts
Raw material forms：6 parts of negative ion powder, 25 parts of magnesium chloride, 35 parts of magnesia, 15 parts of silica flour, 7 parts of lithopone, 3 parts of perlite, hair
3 parts, 150 grams 1 part of infusion, 1 part of modifying agent, auxiliary agent specification glass fiber cloths.
3. a kind of preparation method of light anion fire resistant doorsets according to claim 1, it is characterised in that comprise the following steps：
(1) magnesium chloride is added in speed stirrer and adds little water stirring at low speed 20-40 minutes obtained slurry；
(2) negative ion powder, magnesia, silica flour, lithopone, perlite are added into moderate-speed mixer 20- in speed stirrer
40 minutes, add the foaming agent, modifying agent, auxiliary agent and slurry made from this step (1), moderate-speed mixer 40-60 minute systems
Obtain plastic type compound；
(3) a face decorative cover is put into the mold bottom back side upward, pours gained plastic type compound, when pouring 1/3 thickness,
The glass fabric of 120-180 grams of specification of first layer is laid, 120-180 grams of specification of the second layer is laid when being poured into 2/3 thickness
Glass fabric, is put into another side decorative cover when being poured into mold plane, down, the door core is made in the back side, then by the door
Core is put into hot pressing 2-5 hours in hot press；
(4) door side door core is grouped together and can be prepared by a kind of light anion fire resistant doorsets of the present invention.
4. a kind of preparation method of light anion fire resistant doorsets according to claim 3, the hot pressing temperature is 150 DEG C -220
℃。
5. a kind of preparation method of light anion fire resistant doorsets according to claim 3, moisture content 7%-11%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710819781.0A CN107417243A (en) | 2017-09-11 | 2017-09-11 | A kind of light anion fire resistant doorsets and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710819781.0A CN107417243A (en) | 2017-09-11 | 2017-09-11 | A kind of light anion fire resistant doorsets and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107417243A true CN107417243A (en) | 2017-12-01 |
Family
ID=60433148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710819781.0A Withdrawn CN107417243A (en) | 2017-09-11 | 2017-09-11 | A kind of light anion fire resistant doorsets and preparation method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN107417243A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108751790A (en) * | 2018-07-11 | 2018-11-06 | 合肥伊只门窗有限公司 | A kind of preparation method of insulated fire door |
| CN108995010A (en) * | 2018-08-23 | 2018-12-14 | 安徽美林凯迪木业有限公司 | A kind of fire resistant doorsets preparation process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1931781A (en) * | 2005-09-15 | 2007-03-21 | 上海华固特种门窗有限公司 | Making process of fireproof inorganic door core and door leaf |
| CN101767976A (en) * | 2010-01-18 | 2010-07-07 | 邓东华 | Fireproof door core material and application thereof in preparation of fireproof door |
| CN103089126A (en) * | 2013-01-08 | 2013-05-08 | 邝钜炽 | Green fire door core and manufacturing method of same and fire door |
| CN106246078A (en) * | 2016-08-31 | 2016-12-21 | 湖州南浔恒峰家居科技有限公司 | A kind of high-strength fire-retardant timber |
-
2017
- 2017-09-11 CN CN201710819781.0A patent/CN107417243A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1931781A (en) * | 2005-09-15 | 2007-03-21 | 上海华固特种门窗有限公司 | Making process of fireproof inorganic door core and door leaf |
| CN101767976A (en) * | 2010-01-18 | 2010-07-07 | 邓东华 | Fireproof door core material and application thereof in preparation of fireproof door |
| CN103089126A (en) * | 2013-01-08 | 2013-05-08 | 邝钜炽 | Green fire door core and manufacturing method of same and fire door |
| CN106246078A (en) * | 2016-08-31 | 2016-12-21 | 湖州南浔恒峰家居科技有限公司 | A kind of high-strength fire-retardant timber |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108751790A (en) * | 2018-07-11 | 2018-11-06 | 合肥伊只门窗有限公司 | A kind of preparation method of insulated fire door |
| CN108995010A (en) * | 2018-08-23 | 2018-12-14 | 安徽美林凯迪木业有限公司 | A kind of fire resistant doorsets preparation process |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20171201 |
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