CN110015860A - A kind of water-fast lightweight Thistle board and preparation method thereof - Google Patents
A kind of water-fast lightweight Thistle board and preparation method thereof Download PDFInfo
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- CN110015860A CN110015860A CN201810015612.6A CN201810015612A CN110015860A CN 110015860 A CN110015860 A CN 110015860A CN 201810015612 A CN201810015612 A CN 201810015612A CN 110015860 A CN110015860 A CN 110015860A
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- 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
- C04B28/14—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 calcium sulfate cements
-
- 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
- C04B2111/0062—Gypsum-paper board like materials
-
- 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
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Laminated Bodies (AREA)
- Building Environments (AREA)
Abstract
The invention discloses a kind of water-fast lightweight Thistle boards, and including the plasterboard between two layers of mask paper and two layers of mask paper, the plasterboard includes compounding waterproofing agent, and compounding waterproofing agent includes following components: silica solution 1-10 parts by weight；Water-soluble silicon resin 0.1-10 parts by weight；Aluminium oxide 0.1-5 parts by weight；Palmitinic acid 0.5-3 parts by weight；Acid-washed quartz sand 1-6 parts by weight.By adding the components such as a certain amount of silica solution, water-soluble silicon resin in gypsum slurry, cooperation plant foaming agent is used, so that obtained plasterboard has excellent water resistance.Also have the characteristics that lightweight, mechanical property are excellent simultaneously.
Description
Technical field
The present invention relates to plasterboard preparation field more particularly to a kind of water-fast lightweight Thistle board and preparation method thereof.
Background technique
Plasterboard is light with relative weight, intensity is higher, thinner thickness, easy to process and sound insulation is insulated and the property such as fire prevention
Can, it is one of the novel light plate of current development emphatically.Currently, plasterboard is widely used in house, office building, shop, trip
Internal partition wall, ceiling, abatvoix, ground layer plate and various decorative panels of the various buildings such as shop and industrial premises etc..
But the solubility of the dihydrate gypsum of gypsum board core is larger, when plastering is by the time of tide, effectively overlaps number between crystal
Amount is reduced, binding force dies down, and intensity also can be reduced accordingly.And there are microcracks inside gypsum hardenite, after product moisture absorption, water
Film forms " chock effect " in crack, and crystal structure is forced to separate.The water evaporation that reaction is had neither part nor lot in after gypsum hydration and hardening is hard
Change and form a large amount of holes in body, forms penetrating passage after meeting water.If plasterboard is without water-proofing treatment, water absorption rate is reachable for 24 hours
50%, it is even higher.Currently, water-proofing treatment to plasterboard mainly include the following types:
(1) gypsum board surface processing mainly sprays waterproofing agent to gypsum board surface or increases water repellent facing；But it is such
Method is very high to construction requirement, once defect occurs in gypsum board surface, waterproof effect can big heavy discount.
(2) doping inorganic coagulation material adulterated in gypsum inorganic coagulation material can make to generate during parget water it is resistance to
Aqueous hydrated product is that gypsum by single crystalline texture becomes brilliant plastic structure, can generate package and support to gypsum crystal
Effect improves water resistance.But such method will cause the increase of plasterboard density；Inorganic coagulation material and gypsum hydration rate are not
Unanimously, the unfavorable factors such as panel strength be will affect.
(3) it adds high molecular polymer and adds the organic matter with hydrophobic group.But there are at high cost, gypsum can be reduced
The problem of plate intensity, increase plasterboard weight.
Summary of the invention
The present invention is intended to provide a kind of water-fast lightweight Thistle board, passes through the addition compounding waterproof in gypsum slurry
Agent, cooperation plant foaming agent uses, so that obtained plasterboard has excellent water resistance.Simultaneously also have lightweight,
The excellent feature of mechanical property.
According to an aspect of the present invention, the present invention provides a kind of water-fast lightweight Thistle boards, including two layers of mask
Plasterboard between paper and two layers of mask paper, the plasterboard include compounding waterproofing agent, the compounding waterproofing agent comprising with
Lower component: silica solution 1-10 parts by weight；Water-soluble silicon resin 0.1-10 parts by weight；Aluminium oxide 0.1-5 parts by weight；Palmitinic acid 0.5-
3 parts by weight；Acid-washed quartz sand 1-6 parts by weight；
The compounding waterproofing agent is prepared by the following method: the palmitinic acid being warming up to 80-100 DEG C, the oxidation is added
Aluminium, acid-washed quartz sand are stirred, and obtain mixture；The silica solution, water-soluble silicon resin are added 10-50mL 0.05M's
In NaOH solution, stirring is warming up to 60-80 DEG C, and the mixture is added, and stirs 5-10min, is dried in vacuo to get the compounding
Waterproofing agent.
Wherein, 100 parts by weight gessoes are based on, further include
Wherein, the weight ratio of the silica solution and the water-soluble silicon resin is 1:2.
Wherein, the foaming agent is plant foaming agent, specially one of Tea Saponin foaming agent, saponin foaming agent
Or mixtures thereof.
Wherein, the content of each component are as follows:
Wherein, the content of each component are as follows:
Wherein, the content of each component are as follows:
According to another aspect of the present invention, a kind of preparation method of water-fast lightweight Thistle board is provided, feature exists
In, comprising the following steps:
The gesso of predetermined weight part compounds the one or more of waterproofing agent, cement or lime, modified starch by meter
Amount enters blender into mixing reamer after being sufficiently mixed；The foaming agent of predetermined weight part is added to the water, mixed liquor is logical
Enter blender after crossing foamed system foaming；Each raw material is sufficiently stirred through the blender, and uniform sizing material is made, is continuously cast in
Between two layers of mask paper, plasterboard wet plate is made through extrusion forming；The plasterboard wet plate is behind solidification, cutting, drying, saw side
The water-fast lightweight Thistle board is made.
Water-fast lightweight Thistle board of the invention, including the gypsum between two layers of mask paper and two layers of mask paper
Plate, the plasterboard include compounding waterproofing agent, and the compounding waterproofing agent includes following components: silica solution 1-10 parts by weight；It is water-soluble
Property silicone resin 0.1-10 parts by weight；Aluminium oxide 0.1-5 parts by weight；Palmitinic acid 0.5-3 parts by weight；Acid-washed quartz sand 1-6 parts by weight；
Silica solution is a kind of unformed silicon dioxide colloid, and particle forms colloidal solution after being dispersed in water.With good
Good caking property forms firm inoranic membrane after dry, and will not be re-dissolved in water.Suitable silica solution is added to calcium plaster
It in material, can penetrate into the hole of gypsum, the structure feature of dihydrate gypsum can be changed, generate new gelatinous mass.It is water-soluble
Silicone resin belongs to organic siliconresin, commonly used in synthesis, protein or natural fabric, or as paint, coating it is excellent
Good additive etc., but do not have been reported that and be applied in plasterboard preparation.The exploratory addition of the present invention is a certain amount of water-soluble
Property silicone resin, waterproof effect water-fast to its are probed into.It was found that there is addition 0.1-10 parts by weight obvious waterproof to imitate
Fruit, it is further preferred that being 1-5 parts by weight.
Aluminium oxide, the admixtures such as acid-washed quartz sand are added in compounding waterproofing agent, can be participated in jointly with gypsum aquation with
Sclerous reaction forms the hydrated product with the hydraulicity such as CSH gel, entringite, dihydrate gypsum is protected, to improve water-fast
Property.Selection acid-washed quartz sand is due to finding in experiment test, and acid-washed quartz sand is more preferable than quartz sand waterproof effect.
Palmitinic acid belongs to higher fatty acids, belongs to hydrophobic compound, and by being heated up, aluminium oxide, acid-washed quartz sand is added
Mixing, is then then added in the NaOH solution of 0.05M, and silica solution, water-soluble silicon resin is added, and stirring is warming up to 60-80 DEG C,
5-10min is stirred, the compounding waterproofing agent being dried in vacuo, each component uniformly mixes, and can be homogeneously dispersed in gypsum
In slurry；It is provided simultaneously with hydrophobic substance and forms two waterproof approach of hydrated product, constitute equably waterproof unit, so that
There is apparent raising compared to the waterproof effect of single plus hydrophobic substance or inorganic spike.
Meanwhile further experiment discovery, silica solution and water-soluble silicon resin are simultaneously using can make plasterboard water absorption rate
It is apparent to reduce；When the two weight ratio is 1:2, water absorption rate is minimum, and water-fast effect is best, is provided simultaneously with excellent mechanical property.
It further include one or more 0-5 parts by weight of cement or lime in plasterboard, cement or lime are as inorganic gel
Material addition, can be generated water resistance hydrated product during gypsum aquation, makes gypsum hardenite hole and dihydrate gypsum
Crystallization contact point all changes；Water-fast effect and panel strength can further be improved.But additive amount should not mistake
It is more, it otherwise will increase plasterboard weight.
Plant foaming agent selects Tea Saponin foaming agent or saponin foaming agent, or both mixture.Plant foaming agent
Air Bubble Size it is moderate, foam stability is relatively good.For waterproof gypsum board of the invention, plant foaming agent is added in selection,
It can keep relatively good foamed stability；To guarantee can further to reduce the weight of plasterboard.
Modified starch is native starch by appropriate chemical treatment, and introducing certain chemical groups makes molecular structure and physics and chemistry
Matter changes, and generates starch derivatives.It migrates after modified starch gelatinization to mask paper and gypsum board interface, makes mask paper and stone
Cream plate is firmly bonded together.The modified starch that the present invention uses is modified corn starch or cassava modified starch, gelatinization temperature
70-75 DEG C, alkaline fluidity 14-20 seconds of degree.
The preparation method of water-fast lightweight Thistle board of the invention, comprising the following steps:
The gesso of predetermined weight part compounds the one or more of waterproofing agent, cement or lime, modified starch by meter
Amount enters blender into mixing reamer after being sufficiently mixed；The foaming agent of predetermined weight part is added to the water, mixed liquor is logical
Enter blender after crossing foamed system foaming；Each raw material is sufficiently stirred through the blender, and uniform sizing material is made, is continuously cast in
Between two layers of mask paper, plasterboard wet plate is made through extrusion forming；Plasterboard wet plate is made behind side through solidification, cutting, drying, saw
Water-fast lightweight Thistle board.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with implementation of the invention
Example, is clearly and completely described technical solution of the present invention, it is clear that described embodiment is that a part of the invention is real
Example is applied, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creation
Property labour under the premise of every other embodiment obtained, shall fall within the protection scope of the present invention.It should be noted that not rushing
In the case where prominent, the features in the embodiments and the embodiments of the present application can mutual any combination.
It compounds the preparation method of waterproofing agent: 0.5-3 parts by weight palmitinic acid being warming up to 80 DEG C, 0.1-5 parts by weight are added
Aluminium oxide, 1-6 parts by weight acid-washed quartz sand are stirred, and obtain mixture；In the NaOH solution of 0.05M, 1-10 parts by weight are added
Silica solution, 0.1-10 parts by weight water-soluble silicone resin, stirring are warming up to 60-80 DEG C, and the mixture is added, and stir 10min, very
Sky is dry to get compounding waterproofing agent.
The content of the plasterboard each component are as follows: 100 parts by weight of gesso；Silica solution 2-4 parts by weight；Water-soluble silicon resin
1-4 parts by weight；Aluminium oxide 0.5-2 parts by weight；Palmitinic acid 1-3 parts by weight；Acid-washed quartz sand 1-5 parts by weight；Cement or lime
One or more 0.5-3 parts by weight；Modified starch 0.05-0.8 parts by weight；Foaming agent 0.05-0.5 parts by weight；Water 70-80 weight
Part.
Each embodiment Thistle board preparation method: the gesso, compounding waterproofing agent, cement or lime of predetermined weight part
One or more, modified starch enter blender after being sufficiently mixed into mixing reamer by metering；By predetermined weight part
Foaming agent be added to the water, mixed liquor by foamed system foam after enter blender；Each agitated machine of raw material is sufficiently stirred,
Uniform sizing material is made, is continuously cast between two layers of mask paper, plasterboard wet plate is made through extrusion forming；Plasterboard wet plate is through solidifying
Gu, cutting, dry, saw water-fast lightweight Thistle board is made behind side.
Embodiment
Embodiment 1
Embodiment 2
Embodiment 3
Embodiment 4
Embodiment 5
Embodiment 6
Test case
Test case 1
Different silica solution volumes, the plasterboard of water-soluble silicon resin volume and the two when being used in compounding are tested respectively
Water absorption rate situation, specific data are as shown in table 1- table 3.Table 1 shows the plasterboard water absorption rate feelings under different silica solution volumes
Condition.
Influence of the 1 silica solution volume of table to plasterboard water absorption rate
| Silica solution volume | 0 | 1 | 2 | 3 | 4 | 6 | 10 |
| 2h water absorption rate/% | 31.8 | 21.6 | 21.2 | 20.6 | 20.2 | 19.2 | 18.4 |
Table 2 shows the plasterboard water absorption rate situation in the case of different water-soluble silicon resin volumes.
Influence of the 2 water-soluble silicon resin of table to plasterboard water absorption rate
| Water-soluble silicon resin volume | 0.1 | 1 | 2 | 4 | 6 | 8 | 10 |
| 2h water absorption rate/% | 26.6 | 17.8 | 17.2 | 16.4 | 15.9 | 15.6 | 14.4 |
By Tables 1 and 2 it can be seen that with silica solution or water-soluble silicon resin volume increase, the water absorption rate of plasterboard with
Decline, but as volume is excessive, water absorption rate reduction tends towards stability；And volume is excessive, and panel strength can accordingly reduce.
Table 3 shows the plasterboard water absorption rate feelings of different silica solution and water-soluble silicon resin when different addition quantity matches
Condition.
Table 3
| Volume proportion | 3:1 | 2:1 | 1:1 | 1:2 | 1:3 |
| 2h water absorption rate/% | 8.6 | 5.5 | 4.6 | 3.8 | 5.9 |
It can see by data in table 3, it is different within the scope of silica solution of the present invention with water-soluble silicon resin respectively parts by weight
Volume it is also not identical with the influence for comparing water absorption rate, the two, which acts synergistically, can further decrease the water absorption rate of plasterboard；When
When silica solution and water-soluble silicon resin proportion are 1:2, water absorption rate is minimum, while plasterboard also has relatively good mechanical property.
Test case 2
Dependence test is carried out to the mechanical property of the Thistle board of each embodiment, test data is as shown in table 4.
The performance of each embodiment Thistle board of table 4
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | |
| 2h water absorption rate/% | 10.1 | 4.2 | 2.5 | 2.3 | 3.6 | 4.3 |
| Longitudinal fracture load/N | 427.8 | 430.1 | 455.2 | 456.9 | 426.2 | 418.8 |
| Transverse breakage load/N | 199.4 | 210.2 | 232.6 | 236.5 | 223.6 | 188.4 |
Have following performance by Thistle board produced by the present invention: adhesive property meets requirements of the national standard；9.5mm thick
Plasterboard mass area ratio 6.5-7.0kg/m2, far superior to mass area ratio is no more than 9.5kg/m2National standard want
It asks.Wherein, embodiment 3 and the effect on water absorption rate and mechanical property of embodiment 4 are best.In contrast to 3 data of table, it can be seen that
Waterproof effect caused by the synergistic effect of each component is better than the waterproof effect of component independent role in compounding waterproofing agent.Laterally
Breaking load average value and longitudinal fracture load average value are much higher than requirements of the national standard；Remaining indices is all satisfied country
Standard requirements.
In conclusion the water-fast lightweight Thistle board provided according to the present invention, is compounded by adding in gypsum slurry
Waterproofing agent, cooperation plant foaming agent uses, so that obtained plasterboard has excellent water resistance.Also have simultaneously light
The excellent feature of matter, mechanical property.
Descriptions above can combine implementation individually or in various ways, and these variants all exist
Within protection scope of the present invention.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations.Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (8)
1. a kind of water-fast lightweight Thistle board, which is characterized in that including between two layers of mask paper and two layers of mask paper
Plasterboard, the plasterboard include compounding waterproofing agent, and the compounding waterproofing agent includes following components: silica solution 1-10 parts by weight；
Water-soluble silicon resin 0.1-10 parts by weight；Aluminium oxide 0.1-5 parts by weight；Palmitinic acid 0.5-3 parts by weight；Acid-washed quartz sand 1-6 weight
Measure part；
The compounding waterproofing agent is prepared by the following method: the palmitinic acid being warming up to 80-100 DEG C, the aluminium oxide, acid is added
It washes quartz sand to be stirred, obtains mixture；The NaOH that 10-50mL 0.05M is added in the silica solution, water-soluble silicon resin is molten
In liquid, stirring is warming up to 60-80 DEG C, and the mixture is added, and stirs 5-10min, is dried in vacuo to get the compounding waterproof
Agent.
2. water-fast lightweight Thistle board as described in claim 1, which is characterized in that be based on 100 parts by weight gessoes, also
Including
3. water-fast lightweight Thistle board as described in claim 1, which is characterized in that the silica solution and the water-soluble silicon
The weight ratio of resin is 1:2.
4. water-fast lightweight Thistle board as described in claim 1, which is characterized in that the foaming agent is plant foaming
Or mixtures thereof one of agent, specially Tea Saponin foaming agent, saponin foaming agent.
5. water-fast lightweight Thistle board as claimed in claim 2, which is characterized in that the content of each component are as follows:
6. water-fast lightweight Thistle board as claimed in claim 5, which is characterized in that the content of each component are as follows:
7. water-fast lightweight Thistle board as claimed in claim 5, which is characterized in that the content of each component are as follows:
8. as the described in any item water-fast lightweight Thistle boards of claim 1-7 preparation method, which is characterized in that including with
Lower step:
The gesso, compounding waterproofing agent, cement or the one or more of lime of predetermined weight part, modified starch process metering,
Into mixing reamer, blender is entered after being sufficiently mixed；The foaming agent of predetermined weight part is added to the water, mixed liquor passes through hair
Enter blender after the foaming of bubble system；Each raw material is sufficiently stirred through the blender, and uniform sizing material is made, is continuously cast in two layers
Between mask paper, plasterboard wet plate is made through extrusion forming；The plasterboard wet plate is made behind side through solidification, cutting, drying, saw
The water-fast lightweight Thistle board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810015612.6A CN110015860B (en) | 2018-01-08 | 2018-01-08 | Water-resistant light gypsum plaster board and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810015612.6A CN110015860B (en) | 2018-01-08 | 2018-01-08 | Water-resistant light gypsum plaster board and preparation method thereof |
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| Publication Number | Publication Date |
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| CN110015860A true CN110015860A (en) | 2019-07-16 |
| CN110015860B CN110015860B (en) | 2020-08-14 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111138152A (en) * | 2020-01-03 | 2020-05-12 | 肇庆北新建材有限公司 | Waterproof gypsum board core, preparation method thereof and waterproof gypsum board |
| CN112851278A (en) * | 2021-01-20 | 2021-05-28 | 荆门千年健医疗保健科技有限公司 | Gypsum substrate wood-like board and flitch, preparation method thereof and composite gypsum board |
| CN112998541A (en) * | 2021-02-27 | 2021-06-22 | 陈玉霞 | Intelligent soybean milk machine capable of achieving rapid filtration |
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| CN1099014A (en) * | 1993-08-14 | 1995-02-22 | 核工业北京地质研究院 | Light silencing and refractory mineral decoration board and working method thereof |
| CN101012119A (en) * | 2007-01-11 | 2007-08-08 | 云南天之豪装饰材料有限公司 | Lightening gypsum suspended ceiling |
| CN104261863A (en) * | 2014-09-17 | 2015-01-07 | 北新集团建材股份有限公司 | Preparation method of lightweight water-resistant paperbacked gypsum board |
| CN104628348A (en) * | 2013-11-13 | 2015-05-20 | 北新集团建材股份有限公司 | Water-repellent paper-surface plasterboard and preparation method thereof |
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| JPS59232986A (en) * | 1983-06-10 | 1984-12-27 | ハイウオ−ル株式会社 | Waterproofing enhancement for construction board |
| EP0269736A1 (en) * | 1986-05-29 | 1988-06-08 | Belorussky Politekhnichesky Institut | Composition for making plaster articles |
| CN1099014A (en) * | 1993-08-14 | 1995-02-22 | 核工业北京地质研究院 | Light silencing and refractory mineral decoration board and working method thereof |
| CN101012119A (en) * | 2007-01-11 | 2007-08-08 | 云南天之豪装饰材料有限公司 | Lightening gypsum suspended ceiling |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111138152A (en) * | 2020-01-03 | 2020-05-12 | 肇庆北新建材有限公司 | Waterproof gypsum board core, preparation method thereof and waterproof gypsum board |
| CN112851278A (en) * | 2021-01-20 | 2021-05-28 | 荆门千年健医疗保健科技有限公司 | Gypsum substrate wood-like board and flitch, preparation method thereof and composite gypsum board |
| CN112851278B (en) * | 2021-01-20 | 2022-07-01 | 荆门千年健医疗保健科技有限公司 | Gypsum substrate wood-like board and flitch, preparation method thereof and composite gypsum board |
| CN112998541A (en) * | 2021-02-27 | 2021-06-22 | 陈玉霞 | Intelligent soybean milk machine capable of achieving rapid filtration |
| CN112998541B (en) * | 2021-02-27 | 2023-02-03 | 广东德玛仕家电有限公司 | Intelligent soybean milk machine capable of achieving rapid filtration |
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| Publication number | Publication date |
|---|---|
| CN110015860B (en) | 2020-08-14 |
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