CN101560861B - Method for manufacturing flame-retardant composite door frame or window frame and door frame or window frame - Google Patents
Method for manufacturing flame-retardant composite door frame or window frame and door frame or window frame Download PDFInfo
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- CN101560861B CN101560861B CN2009100978649A CN200910097864A CN101560861B CN 101560861 B CN101560861 B CN 101560861B CN 2009100978649 A CN2009100978649 A CN 2009100978649A CN 200910097864 A CN200910097864 A CN 200910097864A CN 101560861 B CN101560861 B CN 101560861B
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Abstract
The invention relates to a method for manufacturing a flame-retardant composite door frame or window frame and the door frame or the window frame manufactured by the method, and belongs to the technical field of flame-retardant decorating materials. The method for manufacturing the flame-retardant composite door frame or window frame comprises the steps of liquid preparation, mixing, molding, compacting, waiting and finished products. The door frame or the window frame manufactured by the method has the advantages of high strength, high compressive strength and strong flame-retardant ability. Moreover, compared with the prior manufacturing method, the method is simpler and has lower production cost.
Description
Technical field
The present invention relates to the preparation method of a kind of doorframe or window frame, relate in particular to the preparation method of a kind of flame-retardant composite door frame or window frame and doorframe or the window frame that makes with this method.
Background technology
Along with growth in the living standard, people are also increasingly high for the requirement of dwelling house, and the furniture of solid wood, door, doorframe or window frame and floor etc. receive more people's favor.Undeniable solid wood family property quality is good, class is arranged, but its price is not cheap, and its raw material are perennial woody plants, and particularly tall and big arbor well imagines that popularizing of solid wood family property must be the infringement greatly to environment.
The patent No. is that the Chinese patent of 200710057347.X discloses a kind of patent of invention that is used to produce the fire proofing material of doorframe, window frame and door.It is made up of magnesia unslacked, bittern, wood chip, asbestos, glass fiber, graphite, these raw materials of French chalk.Production method was divided into for three steps: 1, in proportion wood chip is joined in the retort, adds bittern, stirred 20～40 minutes, add other raw material more successively at 20～25 ℃, stir 20～40 minutes subsequent use to pasty state; 2,1/3 pastel is poured in the mould of window frame doorframe or door, added glass fiber mesh then, pour 1/3 pastel again into; 3, with 0.5～5kg/cm
2Press mold punching machine punching press 3～5 minutes, place 3～5 hours stripping formings.The material of producing with this patented method can extensively replace solid wood material, and cost of production is low, has fire-resistant characteristic again, is worthy to be popularized very much.But this patented method need be used plurality of raw materials, and proportioning raw materials is complicated, causes production loaded down with trivial details, has limited production efficiency.
Summary of the invention
The purpose of this invention is to provide the preparation method of a kind of flame-retardant composite door frame or window frame and doorframe or the window frame that makes with this method.It has the advantages that raw material type is few, method is simple, cost of production is low.
Above-mentioned technical purpose of the present invention is achieved through following technical scheme: the preparation method of a kind of flame-retardant composite door frame or window frame comprises following steps successively:
(1) dosing step: under the normal temperature, magnesium chloride is made into the solution for standby that Baume degrees is 23 ° of B é;
(2) condiment step: choose magnesia quality mark content and be that 70.0～90.0% raw material makes it to mix with dosing step gained solution and the furnishing pastel is subsequent use;
(3) molding step: the mould that manufacturing and doorframe or window frame shape match is provided with barrier film on the mould core face; In mould, insert pastel; In mould, lay glass fiber mesh then, insert to the glass fiber mesh surface again and successively draw glass fiber mesh in after pastel repeats repeatedly and between the glass fiber mesh of each layer gathering, insert pastel;
(4) compacting step: the material in the compaction tool makes frame post mould shape;
(5) waiting step: is to leave standstill more than 24 hours under the environment more than 10 ℃ said frame post mould shape in temperature.
The enforcement of technique scheme of the present invention can make doorframe or the window frame that compressive resistance intensity is higher, fire resistance is excellent, and such doorframe or window frame cost of production are lower, is fit to very much promote.
As preferably, it also comprises and is arranged on the finished product step that leaves standstill after the step: the mould of dismounting frame post mould shape gets the frame post, processes framework by the frame post, on framework, sticks wooden skin and japanning.
Doorframe or window frame that the enforcement of technique scheme can make is comparatively attractive in appearance, improve grade.
As preferably, said magnesian purity is 75.0～85.0%.The frame post intensity that magnesian purity height then makes is high, but the too high words of intensity are unfavorable for follow-up processing, and magnesian purity is proper in 75.0～85.0% these scopes.
Preferred as further, said magnesian purity is 79.0～81.0%.This is to limit more accurately what above-mentioned scope was made, that is to say that magnesian purity is more suitable in 79.0～81.0% these scopes.
As preferably, said molding step also includes surplus wood, waste wood filling step, and said surplus wood, waste wood filling step be in the molding step, in successively drawing glass fiber mesh forward direction mould in, adds surplus wooden, waste wood.The enforcement of filling step can be saved more raw material, for producing, practices thrift cost, because surplus wood, waste wood are not have economic worth comparatively speaking.Baume degrees is that the magnesium chloride solution of 23 ° of B é itself just has very high firm degree with the pastel sclerosis back that the raw materials of magnesium oxide that contains mass fraction 80% is modulated into; And surplus wood, waste wood also plays action of steel bars in the similar steel concrete here, strengthened the firm degree of the framework that the present invention produces to a certain extent.When making doorframe or window frame; Need operations such as nail, brill inevitably,, especially follow closely this procedure because the existence of reel layer makes this doorframe stability in the processing and fabricating in later stage greatly promote; Do not have the reel layer, the nail enter nail be unstable.
As preferably; Also include installation steps in said finished product step; Said installation steps are for squeezing into the nut of soket head cap screw on an end end face of frame post with rig; And, the nut of soket head cap screw through said hole and said soket head cap screw is tightened in the punching of an end side surface of another frame post.Solid wood structure is more traditional mode through screw; But it is very difficult will in this type material, realizing connecting through screw; The all threaded nut in the outside had been squeezed into said frame post inside through rig in this just needed; Again with rig with another frame cylindrical drill hole, at last the nut of soket head cap screw through said hole and said soket head cap screw is tightened, the frame post that this type intensity is very high so also can be realized having connected through screw.
As preferably, said magnesium chloride is an anhydrous magnesium chloride.The purity of anhydrous magnesium chloride is higher, and is also more firm with the prepared frame post of this raw material.
As preferably, said to contain magnesian raw material be in magnesite clinker, fused magnesite, seawater magnesia or the periclase powder one or more.
As preferably, repeating described in the molding step repeatedly is 3 times.Number of repetition is just to mean the glass fiber mesh that haves three layers 3 times, and 3 layers of its intensity of glass fiber mesh are enough big, be less than 3 layers firm inadequately; Use 4～6 layers of glass fiber mesh: be not easy to follow-up processing and fabricating owing to intensity is bigger than normal; Glass fiber mesh more than 6 layers: can cause the reduction of intensity on the contrary; Because the size of doorframe post is certain; The increase of the glass fiber mesh number of plies will inevitably cause the use amount of magnesian on the low side, can cause intensity to reduce like this, because intensity is to provide after the magnesian sclerosis.
Another object of the present invention provides a kind of doorframe or window frame, and it has intensity height, fire-resistant characteristics.
Compression test:
Choosing quartzite and granite is tester, is processed into the sample of 5cm * 5cm * 5cm to quartzite, is designated as A; Be processed into the sample of 5cm * 5cm * 5cm to granite, be designated as B; Get one section sample of also processing 5cm * 5cm * 5cm to the doorframe post that makes with the embodiment of the invention 1, be designated as C.A, B, C are tested under same hydraulic press.Record result: A pulverizes when under hydraulic press, being shown as 75069.4 kilograms; B pulverizes when hydraulic press is shown as 37657.6 kilograms; C pulverizes when hydraulic press is shown as 36458.2 kilograms.Can draw to draw a conclusion: 1, quartzitic compressive strength is about 3000kg/cm
2, the compressive strength of granite is about 1500kg/cm
2, the compressive strength of the doorframe post that the embodiment of the invention 1 makes is about 1500kg/cm
22, the compressive strength of using the doorframe post that the embodiment of the invention 1 makes is less than quartzitic compressive strength but suitable with the compressive strength of granite.
Fire resistance test:
Choosing common refractory slab on sale on the market is tester, under oxyhydrogen flame, does fire-resistant experiment.Common refractory slab began to take place deformation, softening, coking, charing in about 2 hours under oxyhydrogen flame; Deformation, softening, coking, charing also do not take place in the doorframe that the present invention makes after 6 hours under oxyhydrogen flame.
In sum, the present invention has following beneficial effect:
1, the preparation method of a kind of flame-retardant composite door frame of the present invention or window frame, the raw material that it adopts only has magnesia and magnesium chloride, and matching method is quite simple, and cost of production is low;
2, doorframe or the window frame intensity of using the present invention to make are high, under pressure test, record to use the compressive strength of the doorframe post that the present invention makes to be about 1500kg/cm
2
3, the doorframe or the window frame refractory ability that use the present invention to make are strong, and under oxyhydrogen flame under the test, the fire endurance that records the doorframe post that use the present invention makes was greater than 6 hours, and integrality was greater than 6 hours;
4, the preparation method of a kind of flame-retardant composite door frame of the present invention or window frame, its needed production equipment is also very easy, can be wooden mould;
5, the preparation method of a kind of flame-retardant composite door frame of the present invention or window frame, it uses waste wood, surplus wood dexterously, turns waste into wealth;
6, use the inventive method can prepare doorframe, window frame, this type doorframe, the alternative wood products of window frame can reduce the cutting capacity of xylophyta, help the construction of environmental protection;
7, modulate under the cold situation indoor fanning the air summer; The outdoor section and the indoor section temperature difference of the doorframe that makes with the present invention are obvious; Other doorframes such as aluminium alloys doorframe indoor/outdoor temperature-difference difference are little; Can draw effectively blocking heat source of the doorframe that uses the inventive method preparation, window frame from this qualitative contrast test, effectively keep the temperature difference of indoor and outdoor.
Description of drawings
Fig. 1 is the partial structurtes figure that makes a kind of flame-retardant composite door frame or window frame with the inventive method;
Fig. 2 is the syndeton sectional view that makes a kind of flame-retardant composite door frame or window frame with the inventive method;
Fig. 3 is the preparation method's of a kind of flame-retardant composite door frame of the present invention or window frame a die drawing;
Fig. 4 be the inventive method the model processed of the wooden die that will use;
Fig. 5 is the johning knot composition of soket head cap screw of the present invention and nut.
1 is the doorframe post among the figure, the 2nd, and soket head cap screw, the 3rd, nut, the 4th, outside screw, the 5th, mold, the 6th, cover plate, the 7th, mold slots, the 8th, depression, the 9th, doorframe post back of the body depression, the 10th, wooden filler.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is done further explain.
This specific embodiment only is to explanation of the present invention; It is not a limitation of the present invention; Those skilled in the art can make the modification that does not have creative contribution to present embodiment as required after reading this manual, but as long as in claim scope of the present invention, all receive the protection of Patent Law.
The preparation method of a kind of flame-retardant composite door frame or window frame:
At normal temperatures, anhydrous magnesium chloride is made into the solution for standby that Baume degrees is 23 ° of B é; Choose magnesia purity and be 80% magnesite clinker as powder stock, subsequent use with above-mentioned solution and above-mentioned powder stock furnishing pastel; Make the mould that matches with the doorframe shape; On the core rod face of mould, lay barrier film; In mould, insert pastel; In mould, lay glass fiber mesh then, pastel on the glass fiber mesh surfaces coated more successively draws glass fiber mesh in and between the glass fiber mesh of each layer gathering, inserts pastel after repeating 3 times; Material in the compaction tool makes doorframe post mould shape; Leave standstill more than 24 hours in temperature under the environment more than 10 ℃ said doorframe post mould shape; Dismantle the above-mentioned wooden die that leaves standstill the doorframe post mould shape after 24 hours, make doorframe post 1; Squeeze into the nut 3 of soket head cap screw with rig at an end end face of doorframe post 1; Punch with rig in side at another doorframe post 1 one ends; At last the nut 3 of soket head cap screw 2 through said hole and said soket head cap screw is tightened, processes door frame, again through cut, cut, technology such as plane polishes door frame; On door frame, stick wooden skin then, last japanning gets final product.
Said magnesite clinker is to use high-temperature services such as shaft furnace, rotary kiln to be raw material with magnisite, through once calcining or two step calcine technologies are fired the magnesia that forms.
At normal temperatures, anhydrous magnesium chloride is made into the solution for standby that Baume degrees is 23 ° of B é; Choose magnesia purity and be 85% periclase as powder stock, subsequent use with above-mentioned solution and above-mentioned powder stock furnishing pastel; Make the mould that matches with the doorframe shape; On the core rod face of mould, lay barrier film; In mould, insert pastel, in mould, lay glass fiber mesh then, again pastel on the glass fiber mesh surfaces coated; In mould, add surplus wood, waste wood bar after repeating 3 times, successively draw glass fiber mesh then in and between the glass fiber mesh of each layer gathering, insert pastel; Material in the compaction tool makes doorframe post mould shape; Leave standstill more than 24 hours in temperature under the environment more than 10 ℃ said doorframe post mould shape; Dismantle the above-mentioned wooden die that leaves standstill the doorframe post mould shape after 24 hours, make doorframe post 1; Squeeze into the nut 3 of soket head cap screw with rig at an end end face of doorframe post 1; Punch with rig in side at another doorframe post 1 one ends; At last the nut 3 of soket head cap screw 2 through said hole and said soket head cap screw is tightened, processes door frame, again through cut, cut, technology such as plane polishes door frame; On door frame, stick wooden skin then, last japanning gets final product.
Said periclase is the oxide mineral of magnesium, and being that dolomite is at high temperature rotten forms, and mainly produces in marble.
At normal temperatures, anhydrous magnesium chloride is made into the solution for standby that Baume degrees is 23 ° of B é; Choose magnesia purity and be 75% the magnesite clinker and the mixture of seawater magnesia and mix the back as powder stock, subsequent use with above-mentioned solution and above-mentioned powder stock furnishing pastel; Make the mould that matches with the window frame shape; On the core rod face of mould, lay barrier film; In mould, insert pastel, in mould, lay glass fiber mesh then, again pastel on the glass fiber mesh surfaces coated; In mould, add surplus wood, waste wood bar after repeating 3 times, successively draw glass fiber mesh then in and between the glass fiber mesh of each layer gathering, insert pastel; Material in the compaction tool makes window frame post mould shape; Leave standstill more than 24 hours in temperature under the environment more than 10 ℃ said window frame post mould shape; Dismantle the above-mentioned wooden die that leaves standstill the window frame post mould shape after 24 hours, make the window frame post; Squeeze into the nut 3 of soket head cap screw with rig at an end end face of window frame post; Punch with rig in side at another window frame post one end; At last the nut 3 of soket head cap screw 2 through said hole and said soket head cap screw is tightened, processes window frame, again through cut, cut, technology such as plane polishes window frame; On window frame, stick wooden skin then, last japanning gets final product.
Said seawater magnesia is meant and from seawater, extracts the magnesia that magnesia is processed.
Embodiment 4
At normal temperatures, anhydrous magnesium chloride is made into the solution for standby that Baume degrees is 23 ° of B é; Choose magnesia purity and be 70% the periclase and the mixture of seawater magnesia and mix the back as powder stock, subsequent use with above-mentioned solution and above-mentioned powder stock furnishing pastel; Make the mould that matches with the doorframe shape; On the core rod face of mould, lay barrier film; In mould, insert pastel, in mould, lay glass fiber mesh then, again pastel on the glass fiber mesh surfaces coated; In mould, add surplus wood, waste wood bar after repeating 4 times, successively draw glass fiber mesh then in and between the glass fiber mesh of each layer gathering, insert pastel; Material in the compaction tool makes doorframe post mould shape; Leave standstill more than 24 hours in temperature under the environment more than 10 ℃ said doorframe post mould shape; Dismantle the above-mentioned wooden die that leaves standstill the doorframe post mould shape after 24 hours, make doorframe post 1; Squeeze into the nut 3 of soket head cap screw with rig at an end end face of doorframe post 1; Punch with rig in side at another doorframe post 1 one ends; At last the nut 3 of soket head cap screw 2 through said hole and said soket head cap screw is tightened, processes door frame, again through cut, cut, technology such as plane polishes door frame; On door frame, stick wooden skin then, last japanning gets final product.
At normal temperatures, anhydrous magnesium chloride is made into the solution for standby that Baume degrees is 23 ° of B é; The mixture of choosing magnesia purity and be 90% periclase, seawater magnesia and electric capacity magnesia mixes the back as powder stock, and is subsequent use with above-mentioned solution and above-mentioned powder stock furnishing pastel; Make the mould that matches with the doorframe shape; On the core rod face of mould, lay barrier film; In mould, insert pastel, in mould, lay glass fiber mesh then, again pastel on the glass fiber mesh surfaces coated; In mould, add surplus wood, waste wood bar after repeating 3 times, successively draw glass fiber mesh then in and between the glass fiber mesh of each layer gathering, insert pastel; Material in the compaction tool makes doorframe post mould shape; Leave standstill more than 24 hours in temperature under the environment more than 10 ℃ said doorframe post mould shape; Dismantle the above-mentioned wooden die that leaves standstill the doorframe post mould shape after 24 hours, make doorframe post 1; Squeeze into the nut 3 of soket head cap screw with rig at an end end face of doorframe post 1; Punch with rig in side at another doorframe post 1 one ends; At last the nut 3 of soket head cap screw 2 through said hole and said soket head cap screw is tightened, processes door frame, again through cut, cut, technology such as plane polishes door frame; On door frame, stick wooden skin then, last japanning gets final product.
At normal temperatures, anhydrous magnesium chloride is made into the solution for standby that Baume degrees is 23 ° of B é; Choose magnesia purity and be 80% the seawater magnesia and the mixture of electric capacity magnesia and mix the back as powder stock, subsequent use with above-mentioned solution and above-mentioned powder stock furnishing pastel; Make the mould that matches with the doorframe shape; On the core rod face of mould, lay barrier film; In mould, insert pastel, in mould, lay glass fiber mesh then, again pastel on the glass fiber mesh surfaces coated; In mould, add surplus wood, waste wood bar after repeating 3 times, successively draw glass fiber mesh then in and between the glass fiber mesh of each layer gathering, insert pastel; Material in the compaction tool makes doorframe post mould shape; Leave standstill more than 24 hours in temperature under the environment more than 10 ℃ said doorframe post mould shape; Dismantle the above-mentioned wooden die that leaves standstill the doorframe post mould shape after 24 hours, make doorframe post 1; Squeeze into the nut 3 of soket head cap screw with rig at an end end face of doorframe post 1; Punch with rig in side at another doorframe post 1 one ends; At last the nut 3 of soket head cap screw 2 through said hole and said soket head cap screw is tightened, processes door frame, again through cut, cut, technology such as plane polishes door frame; On door frame, stick wooden skin then, last japanning gets final product.
Use the prepared doorframe of preparation method of above-mentioned a kind of flame-retardant composite door frame or window frame: like Fig. 1, Fig. 2 and shown in Figure 5; A kind of flame-retardant composite door frame, comprise doorframe post 1, soket head cap screw 2 and match with it, the nut 3 that all there is screw thread in the interior outside and an end also has interior hexagonal.The inside thread of said nut 3 is used for connecting with soket head cap screw 2, and outside screw is used to creep into 1 li on doorframe post, so lines is darker, outside screw 4 is comparatively sharp.Doorframe post 1 comprises being attached to the wooden skin of its decoration on one's body and being sprayed on decorates spraying paint on the wooden skin.Fig. 3 is the wooden die that is used to make above-mentioned doorframe post 1, and it comprises mold 5 and cover plate 6.Fig. 4 be a kind of flame-retardant composite door frame of the present invention or window frame the preparation method its doorframe post 1 that can form of the wooden die that will use.Mold 5 has a plurality of mold slots 7; Each mold slots 7 can both make a doorframe post 1, and each mold slots 7 all has a projection, this projection the position of corresponding doorframe post be exactly the depression 8 among Fig. 4; The depression 8 here is used to place the fire prevention plume; The fire prevention plume can expand under the situation of being heated, and plays the effect of the inside and outside fire of isolating chamber, cigarette, belongs to prior art.Cover plate 6 also has projection, here projection the position of corresponding doorframe post be exactly the doorframe post back of the body depression 9 among Fig. 4, the main effect of said doorframe post back of the body depression 9 is exactly a convenient construction, and it is tightr that doorframe is connected with body of wall.
Claims (9)
1. the preparation method of flame-retardant composite door frame or window frame comprises following steps successively:
(1) dosing step: under the normal temperature, magnesium chloride is made into the solution for standby that Baume degrees is 23 ° of B é;
(2) condiment step: it is subsequent use with dosing step gained solution mixing furnishing pastel to get purity and be 70.0～90.0% magnesia;
(3) molding step: the mould that manufacturing and doorframe or window frame shape match; On the mould core face, barrier film is set; In mould, insert pastel; In mould, lay glass fiber mesh then, insert pastel to the glass fiber mesh surface again, successively draw glass fiber mesh in and between the glass fiber mesh of each layer gathering, insert pastel after repeating repeatedly;
(4) compacting step: the material in the compaction tool makes frame post mould shape;
(5) leave standstill step: said frame post mould shape was left standstill under the environment more than 10 ℃ more than 24 hours;
Said molding step also includes surplus wood, waste wood filling step, and said surplus wood, waste wood filling step are in the molding step, in successively drawing glass fiber mesh forward direction mould in, adds surplus wood, waste wood.
2. the preparation method of a kind of flame-retardant composite door frame according to claim 1 or window frame; It is characterized in that: it also comprises being arranged on and comprises the finished product step that leaves standstill after the step: the mould of dismounting frame post mould shape gets the frame post; Process framework by the frame post, on framework, stick wooden skin and japanning.
3. the preparation method of a kind of flame-retardant composite door frame according to claim 1 or window frame is characterized in that: said magnesian mass fraction is 75.0～85.0%.
4. the preparation method of a kind of flame-retardant composite door frame according to claim 1 or window frame is characterized in that: said magnesia quality mark content is 79.0～81.0%.
5. the preparation method of a kind of flame-retardant composite door frame according to claim 2 or window frame; It is characterized in that: it also includes installation steps; Said installation steps are for squeezing into the nut of soket head cap screw on an end end face of frame post with rig; And, the nut of soket head cap screw through said hole and said soket head cap screw is tightened in the punching of the other end side of frame post.
6. according to the preparation method of claim 1 or 2 or 3 or 4 described a kind of flame-retardant composite door frames or window frame, it is characterized in that: magnesium chloride is an anhydrous magnesium chloride.
7. according to the preparation method of claim 1 or 2 or 3 or 4 described a kind of flame-retardant composite door frames or window frame, it is characterized in that: magnesia is one or more in magnesite clinker, fused magnesite, seawater magnesia or the periclase powder.
8. according to the preparation method of claim 1 or 2 or 3 or 4 described a kind of flame-retardant composite door frames or window frame, it is characterized in that: repeating described in the molding step repeatedly is 3 times.
9. a kind of doorframe or the window frame that make according to claim 1 or 2 or 3 or 4 said methods.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100978649A CN101560861B (en) | 2009-04-18 | 2009-04-18 | Method for manufacturing flame-retardant composite door frame or window frame and door frame or window frame |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100978649A CN101560861B (en) | 2009-04-18 | 2009-04-18 | Method for manufacturing flame-retardant composite door frame or window frame and door frame or window frame |
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| CN101560861B true CN101560861B (en) | 2012-03-28 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1086503A (en) * | 1992-10-31 | 1994-05-11 | 张星舫 | The manufacture method of fabric enhanced magnesite products |
| CN1040974C (en) * | 1993-03-05 | 1998-12-02 | 俞志强 | Light magnesium oxychloride building material |
| CN1072620C (en) * | 1996-11-18 | 2001-10-10 | 赵凤楷 | Composite magnesial material and its use |
| CN100424033C (en) * | 2007-05-16 | 2008-10-08 | 徐爱国 | Fire-proof material for producing doorframe, window frame and door |
-
2009
- 2009-04-18 CN CN2009100978649A patent/CN101560861B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1086503A (en) * | 1992-10-31 | 1994-05-11 | 张星舫 | The manufacture method of fabric enhanced magnesite products |
| CN1040974C (en) * | 1993-03-05 | 1998-12-02 | 俞志强 | Light magnesium oxychloride building material |
| CN1072620C (en) * | 1996-11-18 | 2001-10-10 | 赵凤楷 | Composite magnesial material and its use |
| CN100424033C (en) * | 2007-05-16 | 2008-10-08 | 徐爱国 | Fire-proof material for producing doorframe, window frame and door |
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| CN101560861A (en) | 2009-10-21 |
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