CN110156412B - Perforated back plate and preparation method thereof - Google Patents
Perforated back plate and preparation method thereof Download PDFInfo
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- CN110156412B CN110156412B CN201910487004.XA CN201910487004A CN110156412B CN 110156412 B CN110156412 B CN 110156412B CN 201910487004 A CN201910487004 A CN 201910487004A CN 110156412 B CN110156412 B CN 110156412B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims description 28
- 230000008569 process Effects 0.000 claims description 24
- 238000004080 punching Methods 0.000 claims description 19
- 238000003825 pressing Methods 0.000 claims description 15
- 239000002002 slurry Substances 0.000 claims description 12
- 238000005516 engineering process Methods 0.000 claims description 8
- 230000009467 reduction Effects 0.000 claims description 8
- 238000004537 pulping Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 239000011268 mixed slurry Substances 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000004568 cement Substances 0.000 abstract description 11
- 239000000835 fiber Substances 0.000 abstract description 9
- 239000004570 mortar (masonry) Substances 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 229920003043 Cellulose fiber Polymers 0.000 abstract 1
- 239000003513 alkali Substances 0.000 abstract 1
- 239000007767 bonding agent Substances 0.000 abstract 1
- 239000010881 fly ash Substances 0.000 abstract 1
- 239000003365 glass fiber Substances 0.000 abstract 1
- 239000000843 powder Substances 0.000 abstract 1
- 239000010453 quartz Substances 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 16
- 230000006872 improvement Effects 0.000 description 3
- 239000011490 mineral wool Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- VCUFZILGIRCDQQ-KRWDZBQOSA-N N-[[(5S)-2-oxo-3-(2-oxo-3H-1,3-benzoxazol-6-yl)-1,3-oxazolidin-5-yl]methyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C1O[C@H](CN1C1=CC2=C(NC(O2)=O)C=C1)CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F VCUFZILGIRCDQQ-KRWDZBQOSA-N 0.000 description 1
- FHKPLLOSJHHKNU-INIZCTEOSA-N [(3S)-3-[8-(1-ethyl-5-methylpyrazol-4-yl)-9-methylpurin-6-yl]oxypyrrolidin-1-yl]-(oxan-4-yl)methanone Chemical compound C(C)N1N=CC(=C1C)C=1N(C2=NC=NC(=C2N=1)O[C@@H]1CN(CC1)C(=O)C1CCOCC1)C FHKPLLOSJHHKNU-INIZCTEOSA-N 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 238000011900 installation process Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
-
- 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
- C04B28/02—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 hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a perforated back plate and a preparation method thereof, and belongs to the technical field of cement plate preparation. The perforated back plate is prepared from the following raw materials in parts by weight: 1-5 parts of quartz powder; 3-10 parts of fly ash; 5-10 parts of cellulose fiber; 1-5 parts of ultrahigh-strength PVA fiber; 1-5 parts of alkali-resistant glass fiber; 5-10 parts of sulphoaluminate cement. The perforated back plate prepared by the invention has reasonable aperture and spacing, and the bonding strength can be increased by 20-30% due to the existence of the holes under the condition of not increasing a bonding agent (structural adhesive or bonding mortar).
Description
Technical Field
The invention relates to the technical field of cement board preparation, in particular to a perforated back plate and a preparation method thereof.
Background
The fiber cement board that is used for rock wool heat preservation to decorate integrated board welt on the market at present mainly has two kinds, one kind is the ordinary fiber cement board of no perforation, one kind is the perforation fiber cement board, be limited to the mounting means of heat preservation decoration integrated board, ordinary fiber cement welt surfacing, be subject to the constructor level, in case the superficial ash removal is unclean, or the bonding mortar paints inhomogeneously, very easily lead to the bond strength not enough, the easy phenomenon that drops appears, then appear perforation fiber cement backplate product (refer to the abatvoix), the bond strength has been increased to a certain extent, the problem that the bond strength is not enough has been solved.
In order to control the cost and the dead weight of the integrated board, a 4mm fiber cement board is generally selected as the lining board, but the strength of the fiber cement board is reduced due to the fact that the thickness of the lining board is too thin, and the lining board is easy to break. The distribution of the holes can also influence the strength and the bonding strength of the lining plate, and only the improvement of the raw material formula and the production process, the enhancement of the strength of the ultrathin plate, the optimization of the opening ratio, the maximization of the functions of the ultrathin plate and the optimization of the opening ratio and the improvement of the bonding strength are realized on the premise of not reducing the strength of the lining plate.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the perforated back plate and the preparation method thereof.
In order to solve the technical problems, the invention provides the following technical scheme:
on one hand, the invention provides a perforated back plate which is prepared from the following raw materials in parts by weight:
preferably, the perforated back plate is prepared from the following raw materials in parts by weight:
preferably, the perforated back plate is prepared from the following raw materials in parts by weight:
on the other hand, the invention also provides a preparation method of the perforated back plate, which comprises the following steps:
step 1: pulping
Putting the raw materials into a homogenizer according to the mixing proportion, adding water, and uniformly stirring to form slurry;
step 2: shaping of
The evenly mixed slurry is injected into a slurry storage tank, then the slurry is evenly distributed on the blanket, the running speed of the blanket is ensured to be consistent, a wet plate blank with even thickness is obtained, and the surface of the wet plate blank is ensured to be smooth and free of impurities;
and step 3: stack
Cutting the longitudinal and transverse edges of the wet plate blank orderly, then stacking the cut wet plate blank on a base plate orderly, and stacking into a pile;
and 4, step 4: applying pressure
Adopting a gradual slow-discharge pressurizing technology, applying pressure to the stack by using a press, pressing for 20 minutes, and pressing the stacked blanks into a blank;
and 5: preliminary maintenance
Standing the pressed and formed plate blank for more than 10 hours;
step 6: demoulding
Demolding the preliminarily cured plate blank by using a vacuum chuck, and stacking the plate blank on a curing partition plate with holes according to a group of 20 sheets;
and 7: steam curing
The method comprises the following steps of (1) adopting a low-pressure long-time autoclaved curing technology, putting a demoulded plate blank into an autoclave for curing the plate blank, wherein the curing process is divided into three stages, namely heating and boosting, constant temperature and pressure and cooling and pressure reduction in sequence;
and 8: perforation
And (4) punching by adopting special punching equipment.
Further, in the step 1, the mass percentage of the slurry is 15-25%.
Further, in the step 4, the pressure is applied from 0Kg to 1000Kg within 4 minutes, and the pressure is maintained for 2 minutes, then the pressure is applied from 1000Kg to 2000Kg within 2 minutes, and the pressure is maintained for 2 minutes, and then the pressure is applied from 2000Kg to 3000Kg within 2 minutes, and the pressure is maintained for 6 minutes, and then the pressure is reduced from 3000Kg to 0 within 2 minutes.
Further, in the step 7, the pressure is increased from the standard atmospheric pressure to 0.8MPa in the process of temperature and pressure increase, the time of the stage is 3 hours, the pressure is 0.8MPa in the process of constant temperature and pressure, the time is 7 hours, the pressure is reduced from 0.8MPa to the standard atmospheric pressure in the process of temperature and pressure reduction, and the time is 2 hours.
Further, in the step 8, the perforation rate is 1.5-3%; the aperture is 6-8mm, and the hole spacing is 40-60 mm.
Compared with the prior art, the invention has the following beneficial effects:
1. the perforated back plate is pressed by a press under high pressure, the strength is high, and the fracture phenomenon can not occur in the production and installation processes;
2. the perforation rate is 1.5-3%, the bonding strength of the back plate and the rock wool heat-insulating material is not influenced, and the situation that local rock wool protrudes is avoided;
3. the strength of the back plate obtained by the specific formula and the process steps is improved by over 37 percent at most.
Drawings
FIG. 1 is a schematic view of a perforated backplane of example 1 of the present invention;
FIG. 2 is a time and pressure curve of the pressurization process of step 4 of example 1 of the present invention;
FIG. 3 is a time and pressure curve of the steam-curing process of step 7 of example 1 of the present invention.
Detailed Description
In order to make the technical problems, solutions and advantages of the present invention more apparent, specific embodiments will be described in detail below, but the present invention is by no means limited to these examples. The following description is only a preferred embodiment of the present invention, and is only for the purpose of explaining the present invention, and should not be construed as limiting the scope of the present invention. It should be understood that any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
The components used in the present invention are all commercially available products unless otherwise specified.
The invention provides a perforated back plate and a preparation method thereof, and the specific implementation mode is as follows.
Example 1
A perforated back plate is prepared from the following raw materials in parts by weight:
the preparation method of the perforated back plate comprises the following steps:
step 1: pulping
Putting the raw materials into a homogenizer according to the mixing proportion, adding water, and uniformly stirring to form slurry, wherein the mass percent of the slurry is 25%;
step 2: shaping of
The evenly mixed slurry is injected into a slurry storage tank, then the slurry is evenly distributed on the blanket, the running speed of the blanket is ensured to be consistent, a wet plate blank with even thickness is obtained, and the surface of the wet plate blank is ensured to be smooth and free of impurities;
and step 3: stack
Cutting the longitudinal and transverse edges of the wet plate blank orderly, then stacking the cut wet plate blank on a base plate orderly, and stacking into a pile;
and 4, step 4: applying pressure
Adopting a gradual slow-discharge pressurizing technology, applying pressure to the stack by using a press, pressing for 20 minutes, and pressing the stacked blanks into a blank; applying pressure from 0 to 1000Kg within 4 minutes, holding for 2 minutes, then applying pressure from 1000Kg to 2000Kg within 2 minutes, then holding for 2 minutes, then applying pressure from 2000Kg to 3000Kg within 2 minutes, then holding for 6 minutes, then decreasing pressure from 3000Kg to 0 within 2 minutes, see fig. 2;
and 5: preliminary maintenance
Standing the pressed and formed plate blank for 10 hours;
step 6: demoulding
Demolding the preliminarily cured plate blank by using a vacuum chuck, and stacking the plate blank on a curing partition plate with holes according to a group of 20 sheets;
and 7: steam curing
The method comprises the following steps of (1) adopting a low-pressure long-time autoclaved curing technology, putting a demoulded plate blank into an autoclave for curing the plate blank, wherein the curing process is divided into three stages, namely heating and boosting, constant temperature and pressure and cooling and pressure reduction in sequence; the pressure in the process of temperature rise and pressure rise is increased from the standard atmospheric pressure to 0.8MPa, the time of the stage is 3 hours, the pressure in the process of constant temperature and pressure is 0.8MPa, the time is 7 hours, the pressure in the process of temperature drop and pressure drop is reduced from 0.8MPa to the standard atmospheric pressure, the time is 2 hours, and the figure is 3;
and 8: perforation
Punching by adopting special punching equipment, wherein the punching rate is 1.76%; the aperture is 6mm and the hole spacing is 40mm, see figure 1.
Example 2
A perforated back plate is prepared from the following raw materials in parts by weight:
the preparation method of the perforated back plate comprises the following steps:
step 1: pulping, wherein the mass percent of the pulp is 20%;
and 8: perforation
Punching by adopting special punching equipment, wherein the punching rate is 0.785%; the aperture is 6mm, and the hole spacing is 60 mm.
Example 3
A perforated back plate is prepared from the following raw materials in parts by weight:
the preparation method of the perforated back plate comprises the following steps:
step 1: pulping, wherein the mass percent of the pulp is 25%;
and 8: perforation
Punching by adopting special punching equipment, wherein the punching rate is 1.54%; the aperture is 7mm, and the hole spacing is 50 mm.
Example 4
A perforated back plate is prepared from the following raw materials in parts by weight:
the preparation method of the perforated back plate comprises the following steps:
step 1: pulping, wherein the mass percent of the pulp is 18%;
and 8: perforation
Punching by adopting special punching equipment, wherein the punching rate is 2%; the aperture is 8mm, and the hole spacing is 40 mm.
Example 5
A perforated back plate is prepared from the following raw materials in parts by weight:
the preparation method of the perforated back plate comprises the following steps:
step 1: pulping, wherein the mass percent of the pulp is 20%;
and 8: perforation
Punching by adopting special punching equipment, wherein the punching rate is 3.14%; the aperture is 8mm, and the hole spacing is 40 mm.
To further illustrate the beneficial effects of the perforated backing sheet of the present invention, for reasons of space, a comparative example was constructed as follows, using example 5 as an example only.
Comparative example 1
In this comparative example, the sheet had a perforation rate of 4.9%; the pore diameter was 10mm, and the pore pitch was 40mm, and the other conditions were the same as in example 5.
Comparative example 2
The pressurization process of step 4 was changed to 3000Kg in 12 minutes, then held for 6 minutes, and then the pressure was decreased from 3000Kg to 0 in 2 minutes, and the rest of the conditions were the same as in example 5.
Comparative example 3
The pressurization process of step 4 was changed to apply pressure from 0Kg to 1000Kg within 2 minutes, for 2 minutes, then from 1000Kg to 2000Kg within 2 minutes, then for 2 minutes, then from 2000Kg to 3000Kg within 2 minutes, then for 6 minutes, then from 3000Kg to 0 within 4 minutes, and the rest of the conditions were the same as in example 5.
Comparative example 4
The pressurization process of step 4 was changed to apply a pressure of 0Kg to 1000Kg within 4 minutes, for 1 minute, then a pressure of 1000Kg to 2000Kg within 2 minutes, then for 1 minute, then a pressure of 2000Kg to 3000Kg within 2 minutes, then for 6 minutes, then a pressure of 3000Kg to 0 within 4 minutes, and the rest of the conditions were the same as in example 5.
Comparative example 5
Changing the steam curing process in the step 7 into: the pressure is instantly increased to 0.8MPa in the process of temperature rise and pressure increase, the pressure in the process of constant temperature and pressure is 0.8MPa, the time is 7 hours, the pressure in the process of temperature reduction and pressure reduction is reduced from 0.8MPa to the standard atmospheric pressure for 2 hours, and the rest conditions are the same as those in the embodiment 5.
Comparative example 6
Changing the steam curing process in the step 7 into: the temperature and pressure rise is from the standard atmospheric pressure to 0.8MPa, the time of the stage is 3 hours, the pressure in the constant temperature and pressure process is 0.8MPa, the time is 7 hours, the pressure in the temperature and pressure reduction process is instantly reduced from 0.8MPa to the standard atmospheric pressure, and the rest conditions are the same as those in the embodiment 5.
The perforated back sheets prepared in the above examples 1 to 5 and comparative examples 1 to 6 were subjected to performance tests according to test methods for fiber cement products GB/T7019 to 2014 and test method standards for basic performance of building mortar JGJ/T70-2009, and the test results are shown in table 1.
TABLE 1
| Serial number | Pore diameter mm | Hole spacing mm | The percentage of perforation% | Adhesive strength MPa | Strength MPa |
| Example 1 | 6 | 40 | 1.76 | 0.96 | 17.25 |
| Example 2 | 6 | 60 | 0.785 | 0.89 | 17.65 |
| Example 3 | 7 | 50 | 1.54 | 0.95 | 18.32 |
| Example 4 | 8 | 50 | 2 | 1.03 | 17.87 |
| Example 5 | 8 | 40 | 3.14 | 0.99 | 18.2 |
| Comparative example 1 | 10 | 40 | 4.9 | 0.83 | 16.68 |
| Comparative example 2 | 8 | 40 | 3.14 | 0.99 | 15.57 |
| Comparative example 3 | 8 | 40 | 3.14 | 0.99 | 15.53 |
| Comparative example 4 | 8 | 40 | 3.14 | 0.99 | 14.96 |
| Comparative example 5 | 8 | 40 | 3.14 | 0.99 | 13.24 |
| Comparative example 6 | 8 | 40 | 3.14 | 0.99 | 14.54 |
As can be seen from Table 1, the perforated back plate with the perforation rate of 1.5-3% is obtained by a specific formula and a gradual slow-discharge pressurization technology and a low-pressure long-time autoclaved curing technology, and compared with a comparative example, the strength of the perforated back plate is improved by 9.1-37.5% on the basis of not reducing the bonding strength of the lining plate.
The foregoing is a preferred embodiment of the present invention, and it should be noted that it would be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the principles of the invention, and such modifications and enhancements are also considered to be within the scope of the invention.
Claims (4)
1. The perforated back plate is characterized by being prepared from the following raw materials in parts by weight:
the preparation method of the perforated back plate comprises the following steps:
step 1: pulping
Putting the raw materials into a homogenizer according to the proportion, adding water, and uniformly stirring to form slurry;
step 2: shaping of
The evenly mixed slurry is injected into a slurry storage tank, then the slurry is evenly distributed on the blanket, the running speed of the blanket is ensured to be consistent, a wet plate blank with even thickness is obtained, and the surface of the wet plate blank is ensured to be smooth and free of impurities;
and step 3: stack
Cutting the longitudinal and transverse edges of the wet plate blank orderly, then stacking the cut wet plate blank on a base plate orderly, and stacking into a pile;
and 4, step 4: applying pressure
Adopting a gradual slow-discharge pressurizing technology, applying pressure to the stack by using a press, pressing for 20 minutes, and pressing the stacked blanks into a blank;
and 5: preliminary maintenance
Standing the pressed and formed plate blank for more than 10 hours;
step 6: demoulding
Demolding the preliminarily cured plate blank by using a vacuum chuck, and stacking the plate blank on a curing partition plate with holes according to a group of 20 sheets;
and 7: steam curing
The method comprises the following steps of (1) adopting a low-pressure long-time autoclaved curing technology, putting a demoulded plate blank into an autoclave for curing the plate blank, wherein the curing process is divided into three stages, namely heating and boosting, constant temperature and pressure and cooling and pressure reduction in sequence;
and 8: perforation
Punching by adopting special punching equipment;
in the step 4, the pressure is applied during the process of applying the pressure from 0Kg to 1000Kg within 4 minutes, keeping for 2 minutes, then applying the pressure from 1000Kg to 2000Kg within 2 minutes, then keeping for 2 minutes, then applying the pressure from 2000Kg to 3000Kg within 2 minutes, then keeping for 6 minutes, and then reducing the pressure from 3000Kg to 0 within 2 minutes;
in the step 7, the pressure is increased from the standard atmospheric pressure to 0.8MPa in the process of temperature rise and pressure rise, the time of the stage is 3 hours, the pressure in the process of constant temperature and pressure is 0.8MPa, the time is 7 hours, the pressure in the process of temperature reduction and pressure reduction is reduced from 0.8MPa to the standard atmospheric pressure, and the time is 2 hours;
in the step 8, the perforation rate is 1.5-3%; the aperture is 6-8mm, and the hole spacing is 40-60 mm.
2. The perforated backplate of claim 1, prepared from the following raw materials in parts by weight:
3. the perforated backplate of claim 2, which is prepared from the following raw materials in parts by weight:
4. the perforated backsheet according to any one of claims 1 to 3, wherein the slurry is 15 to 25% by mass in the step 1.
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| JPH03112608A (en) * | 1989-09-27 | 1991-05-14 | Kubota Corp | Decorating process for inorganic plate material |
| CN100337968C (en) * | 2006-04-21 | 2007-09-19 | 史林忠 | High-density calcium silicate board |
| CN101546616B (en) * | 2009-05-04 | 2010-09-22 | 赵德存 | Decorated board for shielding X ray and its manufacture method |
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| CN108585709A (en) * | 2018-05-10 | 2018-09-28 | 南京国电南自电网自动化有限公司 | A kind of preparation of alkali-resistant glass fibre enhancing cement matrix and prefabricated cabin plank |
| CN108821665A (en) * | 2018-08-29 | 2018-11-16 | 江西远洋威利实业有限公司 | A kind of perforated sound-absorbing ceiling and its production technology |
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