CN117415941A - Preparation method and system of paper gypsum board with waterproof surface - Google Patents
Preparation method and system of paper gypsum board with waterproof surface Download PDFInfo
- Publication number
- CN117415941A CN117415941A CN202311394135.6A CN202311394135A CN117415941A CN 117415941 A CN117415941 A CN 117415941A CN 202311394135 A CN202311394135 A CN 202311394135A CN 117415941 A CN117415941 A CN 117415941A
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- Prior art keywords
- gypsum board
- paper
- silicone oil
- methyl hydrogen
- roller
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- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 146
- 239000010440 gypsum Substances 0.000 title claims abstract description 146
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 86
- 239000001257 hydrogen Substances 0.000 claims abstract description 86
- -1 methyl hydrogen Chemical compound 0.000 claims abstract description 86
- 229920002545 silicone oil Polymers 0.000 claims abstract description 86
- 238000007761 roller coating Methods 0.000 claims abstract description 26
- 238000001035 drying Methods 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 10
- 239000007864 aqueous solution Substances 0.000 claims abstract description 9
- 238000000465 moulding Methods 0.000 claims abstract description 6
- 230000001815 facial effect Effects 0.000 claims description 65
- 229910008051 Si-OH Inorganic materials 0.000 claims description 15
- 229910006358 Si—OH Inorganic materials 0.000 claims description 15
- 238000007639 printing Methods 0.000 claims description 15
- 238000006460 hydrolysis reaction Methods 0.000 claims description 14
- 230000007062 hydrolysis Effects 0.000 claims description 13
- 239000011248 coating agent Substances 0.000 claims description 12
- 238000000576 coating method Methods 0.000 claims description 12
- 238000007790 scraping Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 238000004078 waterproofing Methods 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 239000012670 alkaline solution Substances 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 3
- 238000006068 polycondensation reaction Methods 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 239000006052 feed supplement Substances 0.000 claims description 2
- 238000010020 roller printing Methods 0.000 claims description 2
- 230000003068 static effect Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 28
- 239000010410 layer Substances 0.000 description 26
- 230000000694 effects Effects 0.000 description 8
- 238000005336 cracking Methods 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 230000001502 supplementing effect Effects 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000009970 fire resistant effect Effects 0.000 description 2
- 125000001165 hydrophobic group Chemical group 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 238000012643 polycondensation polymerization Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 239000012792 core layer Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010981 drying operation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
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
- B28B15/00—General arrangement or layout of plant ; Industrial outlines or plant installations
-
- 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
- B28B11/243—Setting, e.g. drying, dehydrating or firing ceramic 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
- B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
- B28B17/02—Conditioning the material prior to shaping
- B28B17/023—Conditioning gypsum
-
- 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
- B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
- B28B19/0053—Machines or methods for applying the material to surfaces to form a permanent layer thereon to tiles, bricks or the like
Abstract
The invention discloses a preparation method of a paper gypsum board with waterproof surface, which comprises the following steps: introducing methyl hydrogen-containing silicone oil mixed in an alkaline aqueous solution to roller coating equipment; smearing methyl hydrogen-containing silicone oil on the upper surface of the lower facing paper to be passed through the forming table through roller coating equipment; preliminary molding is carried out on the waterproof lower facing paper containing gypsum paste through a molding table to obtain a primary gypsum board; drying the primary gypsum board to obtain a paper gypsum board with waterproof surface; wherein, in the drying process, si-H in the methyl hydrogen-containing silicone oil is further hydrolyzed, so that the waterproof film forms a surface hydrophobic film on the board core of the primary gypsum board; a system for preparing the paper gypsum board with waterproof surface is also disclosed. The invention realizes that the materials are continuously piled up at a high position, so that the materials are transmitted to a low position to be automatically separated and fall to a material transmission belt for being transmitted to a designated position, the manual auxiliary separation operation is not needed, the structure principle is simple, and the manufacturing cost is low.
Description
Technical Field
The invention relates to the field of gypsum board production, in particular to a preparation method and a system of a paper gypsum board with waterproof surfaces.
Background
The paper plasterboards used in the market are classified into ordinary paper plasterboards, moisture-resistant paper plasterboards, water-resistant paper plasterboards, fire-resistant paper plasterboards, water-resistant fire-resistant paper plasterboards, etc. according to functions, and the main components of the paper plasterboards, whether ordinary or functional, are gypsum, protective paper and a part of additives. Because gypsum materials have the characteristic of easy moisture absorption, especially in the environment with high humidity, the facing paper also has the characteristic of easy moisture absorption, and most of the facing paper has hydrophilicity, so that moisture can permeate through the paper surface and enter the gypsum core layer.
In order to reduce the water absorption rate of the facing paper, a water-resistant paper-surface gypsum board is available, and a hydrophobic material is added into the gypsum board during production, so that the board body of the gypsum board has certain water-resistant property. However, although the water absorption rate of the board core is lower than 10% and the surface water absorption capacity can reach the standard by adding the waterproof material, the surface of the water-resistant paper gypsum board still has the characteristics of being easy to wet due to the fact that water is easy to permeate into the board core from the surface paper, the adhesion between the paper surface and gypsum is damaged, the connection force between gypsum molecules is damaged, and normal use is affected.
For the existing production technology process, in order to produce qualified waterproof paper face plasterboard, the facing paper with waterproof effect can be directly used, but because the using amount of the facing paper is large, the facing paper with waterproof effect is generally an imported material, so that the production cost is high, the popularization is not easy, and when the plasterboard is subjected to drying operation, the water is difficult to be discharged from the inside of the waterproof facing paper, the facing paper is easy to separate from a board core on which water vapor overflows, and the adhesion between paper face and plaster is damaged.
Disclosure of Invention
The invention aims to provide a preparation method and a system of a paper-surface gypsum board with waterproof surfaces, which are used for solving the technical problem that the adhesion between a facing paper and a gypsum board core is easily damaged by moisture in the prior art.
In order to solve the technical problems, the invention specifically provides the following technical scheme:
the invention provides a preparation method of a paper gypsum board with waterproof surface, which comprises the following steps:
introducing methyl hydrogen-containing silicone oil mixed in an alkaline aqueous solution to roller coating equipment;
coating the methyl hydrogen-containing silicone oil on the upper surface of the lower facing paper which is about to pass through a forming table through the roller coating equipment, and forming a waterproof film on the lower facing paper after Si-H in the methyl hydrogen-containing silicone oil is hydrolyzed;
spraying gypsum paste on the lower facing paper containing the waterproof membrane, and performing preliminary molding on the waterproof lower facing paper containing the gypsum paste through the molding table to obtain a primary gypsum board;
drying the primary gypsum board to obtain a paper gypsum board with a waterproof surface;
wherein, during the drying process, si-H in the methyl hydrogen-containing silicone oil is further hydrolyzed, so that the waterproof film forms a surface hydrophobic film on the board core of the primary gypsum board.
As a preferable scheme of the invention, the methyl hydrogen-containing silicone oil is subjected to distributed hydrolysis on the upper protective facial tissue;
when the methyl hydrogen silicone oil is fully coated on the surface of the upper facial tissue, the methyl hydrogen silicone oil is primarily hydrolyzed, namely Si-H is primarily hydrolyzed into Si-OH groups, and the Si-OH groups are combined with the fibers of the upper facial tissue to form a primary waterproof film;
when the primary gypsum board is dried, the remaining Si-H is secondarily hydrolyzed to Si-OH groups, which are further combined with the upper facing paper fiber to form a secondary waterproof film.
As a preferred embodiment of the present invention, the method further comprises the steps of:
in the drying process, the Si-OH groups form a stable-Si-O-covalent network through self-polycondensation to cover the surface of the board core of the primary gypsum;
the core of the primary gypsum board containing the-Si-O-covalent network is combined with the upper facing paper containing the secondary waterproofing membrane to form a gypsum board having a surface that is waterproof.
The invention also provides a preparation system of the paper gypsum board with waterproof surface, which comprises the following steps:
the device comprises a paper roll rack, roller coating equipment, a forming table and a dryer; the paper roll frame, the roller coating equipment, the forming table and the dryer are connected through a conveying device;
the paper roll frame is used for installing lower facing paper;
the roller coating equipment is arranged between the paper roll frame and the forming table, and is used for fully coating methyl hydrogen-containing silicone oil mixed in an alkaline aqueous solution on the surface of the lower facing paper, and the methyl hydrogen-containing silicone oil can be subjected to preliminary hydrolysis on the surface of the lower facing paper to form a primary waterproof film;
the forming table is provided with a discharging machine which is used for spraying gypsum paste on the surface of lower facing paper passing through the forming table, and the forming table is used for carrying out preliminary forming on the lower facing paper containing the gypsum paste and obtaining a primary gypsum board;
the dryer is used for drying the primary gypsum board at a high temperature, and in the drying process, the steam evaporation in the primary gypsum board core and the methyl hydrogen-containing silicone oil are subjected to secondary hydrolysis to form the paper gypsum board with waterproof surface.
As a preferable scheme of the invention, a roll printer is arranged between the paper roll frame and the forming table, the roll printer is used for applying roll printing to the lower facial tissues, and the lower facial tissues are in a flat state when the lower facial tissues pass through the roll printer;
the height of roll printing machine is higher than the scroll frame, upward climbing forms the tilt zone when lower facial tissue passes through the roll printing machine, is located the tilt zone lower facial tissue receives the ascending pulling force of slope, roller coat equipment installs the tilt zone and with the lower facial tissue in tilt zone carries out pressure contact.
As a preferable scheme of the invention, the roller coating equipment comprises a roller arranged between the roller printing machine and the paper roll frame, wherein the roller is used for being attached to the lower facial tissue arranged in the inclined area and is arranged above the lower facial tissue, and when the lower facial tissue moves upwards under the tensile force, the lower facial tissue drives the roller to rotate;
the roller is connected with a material supplementing assembly, the material supplementing assembly is used for feeding the roller to enable the surface of the roller to be provided with methyl hydrogen silicone oil mixed in alkaline solution, and when the lower facial tissue passes through the roller, the methyl hydrogen silicone oil on the roller is roller-coated onto the lower facial tissue.
As a preferable scheme of the invention, the roller comprises a bracket arranged between the roll printing machine and the paper roll frame, the bracket is rotatably provided with a roller, the outer wall of the roller is sleeved with a brush layer, and the brush layer is connected with the feeding component and is used for absorbing the methyl hydrogen-containing silicone oil;
the brush layer with be located the slope district lower facial tissue laminating sets up, the brush layer to lower facial tissue applys with lower facial tissue's incline direction perpendicular decurrent pressure, and when lower facial tissue removes the brush layer drives under the effect of frictional force the cylinder rotates on the support, simultaneously on the brush layer methyl hydrogen silicone oil is paintd to on the surface of lower facial tissue.
As a preferable scheme of the invention, the material supplementing component comprises a shell which is semi-enclosed on the outer wall of the hairbrush layer, two sides of the shell are fixedly arranged on the bracket, the shell is connected with a material feeding pipe, the material feeding pipe is used for introducing methyl hydrogen silicone oil into the shell, and a material feeding groove for reserving the methyl hydrogen silicone oil is arranged in the shell;
and when the brush layer rotates, the brush layer is contacted with the surface of the lower facial tissue after absorbing the methyl hydrogen-containing silicone oil.
As a preferable scheme of the invention, the two sides of the bracket are rotatably provided with the supporting rods, the two supporting rods are connected through the scraping plate, the scraping plate is arranged on the lower facial tissue in a sliding manner, and the scraping plate is positioned at the upstream of the hairbrush layer.
As a preferable scheme of the invention, the bracket is provided with a rotating motor, the rotating motor is connected with the roller, and the rotating motor is used for driving the roller to rotate.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the methyl hydrogen-containing silicone oil mixed with the alkaline solution is smeared on the surface of the lower facing paper, and the methyl hydrogen-containing silicone oil positioned on the lower facing paper reacts with the water vapor, so that the water vapor in the board core can be fully utilized in the high-temperature drying process of the gypsum board, and the influence of the water vapor on the adhesion between the lower facing paper and the gypsum board is prevented;
after the methyl hydrogen silicone oil is combined with the fibers of the lower facing paper, the hydrophobic group is fixed on the surface of the gypsum board, so that the bonding effect between the gypsum board and the lower facing paper is further improved, the lower facing paper is prevented from cracking, and the performance of the gypsum board is improved;
meanwhile, si-OH groups generated after the methyl hydrogen-containing silicone oil is hydrolyzed can be covered on the surface of the gypsum board through self-condensation polymerization to form a more stable-Si-O-covalent network, and finally a hydrophobic film on the surface of the gypsum board is formed, so that the waterproof effect of the gypsum board is further improved, and water accumulation on the gypsum board is prevented.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.
FIG. 1 is a schematic flow chart of a method for making a paper-faced gypsum board having a surface that is water-resistant in accordance with the present invention;
FIG. 2 is a schematic diagram of a system for preparing a gypsum board with a surface waterproof paper surface according to the present invention;
FIG. 3 is a schematic view showing the internal structure of the roll coating apparatus according to the embodiment shown in FIG. 2;
FIG. 4 is a schematic view showing the internal partial structure of the roll coating apparatus according to the embodiment shown in FIG. 2;
FIG. 5 is a schematic side view of a roll coating apparatus according to the embodiment of FIG. 2;
FIG. 6 is a schematic view of the structure of the scraper blade according to the embodiment shown in FIG. 2.
Reference numerals in the drawings are respectively as follows:
1-a paper roll rack; 2-roll coating equipment; 3-a forming table; 4-a dryer; 5-a discharging machine; 6-a roll printing machine; 7-supporting rods; 8-scraping plates; 9-rotating a motor; 10-a conveying device;
201-a roller; 202-a feeding assembly;
2011-stent; 2012-a roller; 2013-a brush layer;
2021-housing; 2022-feeding tube.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in FIG. 1, the invention provides a preparation method of a paper gypsum board with waterproof surface, which comprises the following steps:
s100, introducing methyl hydrogen-containing silicone oil mixed in an alkaline aqueous solution to roller coating equipment;
s200, fixing the lower facing paper in front of a forming table through a paper roll frame, wherein the paper roll frame is arranged at the upstream of the forming table, and a roller coating device is arranged between the paper roll frame and the forming table;
s300, smearing methyl hydrogen-containing silicone oil on the upper surface of the lower facing paper to be passed through a forming table through roller coating equipment, and forming a waterproof film on the lower facing paper after Si-H in the methyl hydrogen-containing silicone oil is hydrolyzed;
s400, spraying gypsum paste on the lower facing paper containing the waterproof membrane, and primarily forming the waterproof lower facing paper containing the gypsum paste through a forming table to obtain a primary gypsum board;
s500, drying the primary gypsum board to obtain a paper gypsum board with a waterproof surface;
wherein, during the drying process, si-H in the methyl hydrogen-containing silicone oil is further hydrolyzed, so that the waterproof film forms a surface hydrophobic film on the board core of the primary gypsum board.
Methyl hydrogen-containing silicone oil is generally put into use in gypsum boards to enhance the water-proof ability of the gypsum board core and prevent the molecules inside the gypsum board from being affected by moisture. In the prior art, the vast majority of the performance of gypsum boards is provided by the underlying facing paper, i.e., the gypsum board has good robustness due to the tension and performance of the facing paper, even though the board body of the gypsum board is very thin.
It follows that the bonding between the gypsum board core and the facing paper becomes an important part for improving the performance of the gypsum board, in this embodiment, methyl hydrogen silicone oil in an alkaline aqueous solution is smeared on the facing paper, water in the gypsum paste is evaporated to form water vapor in the subsequent drying process, and the remaining Si-H groups of the methyl hydrogen silicone oil are subjected to hydrolysis reaction with the water vapor under alkaline conditions to obtain Si-OH groups with hydrophobic effect, and the Si-OH groups can form a stable-Si-O-covalent network on the board core of the primary gypsum board through self-condensation, so that a waterproof film is formed at the position where the primary gypsum board is wrapped by the upper facing paper, and meanwhile, the Si-OH groups can be combined with fibers of the upper facing paper to enable the upper facing paper to be firmly attached on the board core of the gypsum board, so that the upper facing paper is prevented from cracking.
The hydrophobic film prepared by methyl hydrogen-containing silicone oil has the function of reducing the surface energy of the gypsum board, so that the surface of the gypsum board is not stained with water, namely water drops form water drops on the board surface, the water drops can roll away from the board surface at a certain angle and do not stay on the board surface too much, thereby preventing water from penetrating into the board body of the gypsum board from the front surface, and the Si-OH groups can form a stable-Si-O-covalent network on the board core of the primary gypsum board through self-condensation polymerization, so that the waterproof film is formed at the place where the primary gypsum board is wrapped by the upper facing paper, the bonding between the lower facing paper and the board core of the gypsum board is tighter, the performance of the gypsum board is provided by the lower facing paper, the lower facing paper is connected with the board core of the gypsum board, the gypsum board can better support and protect the gypsum board, the gypsum board is less prone to cracking, and the gypsum board has better performance compared with the common gypsum board.
In this embodiment, the method further includes the following steps: the methyl hydrogen silicone oil is subjected to distributed hydrolysis on the upper facial tissue;
when the methyl hydrogen silicone oil is fully coated on the surface of the upper facing paper, the methyl hydrogen silicone oil is primarily hydrolyzed, namely Si-H is primarily hydrolyzed into Si-OH groups, and the Si-OH groups are combined with the fibers of the upper facing paper to form a primary waterproof film;
when the primary gypsum board is dried, the remaining Si-H is secondarily hydrolyzed into Si-OH groups, which are further combined with the facing paper fiber to form a secondary waterproof film.
Because of the special film forming property of methyl hydrogen silicone oil, the methyl hydrogen silicone oil can be formed into a film by hydrolysis when being initially coated and is arranged on the surface of the upper surface protection paper, the methyl hydrogen silicone oil can be further hydrolyzed in the subsequent drying process, at the moment, the methyl hydrogen silicone oil can be adhered to the surface of the gypsum board to form a film, meanwhile, a stable-Si-O-covalent network is formed on the surface of the gypsum board, the surface protection paper and the gypsum board are firmly attached together, not only can moisture generated during drying be absorbed, the cracking between the surface protection paper and the board core is prevented, but also the moisture generated subsequently can be prevented from entering the joint of the board core and the lower surface protection paper, and the performance of the gypsum board is improved.
In this embodiment, in the secondary hydrolysis process, the method further includes the following steps:
in the drying process, si-OH groups form a stable-Si-O-covalent network through self-polycondensation to cover the surface of the board core of the primary gypsum;
the core of the primary gypsum board containing the-Si-O-covalent network is combined with an upper facing paper containing a secondary waterproofing membrane to form a gypsum board with a surface that is waterproof.
According to the preparation method of the paper-surface gypsum board with waterproof surface, provided by the invention, the water vapor in the board core can be fully utilized in the high-temperature drying process of the gypsum board, methyl hydrogen-containing silicone oil on the lower facing paper reacts with the water vapor, and hydrophobic groups are fixed on the surface of the gypsum board after being combined with fibers of the lower facing paper, so that the bonding effect between the gypsum board and the lower facing paper is improved, the cracking of the lower facing paper is prevented, and the performance of the gypsum board is improved.
In addition, si-OH groups generated after the hydrolysis of the methyl hydrogen-containing silicone oil form a more stable-Si-O-covalent network to cover the surface of the gypsum board through self-condensation, and finally form a hydrophobic film on the surface of the gypsum board, so that the waterproof effect of the gypsum board is further improved, and water accumulation on the gypsum board is prevented.
The prior art cannot easily think about a method for coating the surface of methyl hydrogen-containing silicone oil, firstly, because the methyl hydrogen-containing silicone oil is mainly used in the preparation stage of the gypsum board material to improve the waterproof performance of the board core, the methyl hydrogen-containing silicone oil cannot be easily proposed independently. Secondly, the production steps of the gypsum board are increased due to the fact that the methyl hydrogen silicone oil is smeared, and the production cost of the gypsum board is affected by the complex production steps.
In order to simplify the production steps, as shown in fig. 2 to 6, the present invention provides a system for preparing a gypsum board with waterproof surface, comprising a paper roll frame 1, a roll coating device 2, a forming table 3 and a dryer 4 according to the preparation sequence. The paper roll frame 1, the roller coating equipment 2, the forming table 3 and the dryer 4 are connected through a conveying device 10.
The paper roll frame 1 is used for installing lower facing paper. The conveyor 10 can be used to convey the lower facing throughout and to translate the direction of movement of the lower facing.
The roller coating device 2 is arranged between the paper roll frame 1 and the forming table 3, and the roller coating device 2 is used for fully coating methyl hydrogen silicone oil mixed in an alkaline aqueous solution on the surface of the lower facing paper, and the methyl hydrogen silicone oil can be subjected to preliminary hydrolysis on the surface of the lower facing paper to form a primary waterproof film.
The forming table 3 is provided with a discharging machine 5, the discharging machine 5 is used for spraying gypsum paste on the surface of the lower facing paper passing through the forming table 3, and the forming table 3 is used for carrying out preliminary forming on the lower facing paper containing the gypsum paste and obtaining a primary gypsum board. The conveyor 10 conveys the primary gypsum board to the dryer 4.
The dryer 4 is used for drying the primary gypsum board at high temperature, and in the drying process, the moisture evaporation in the primary gypsum board core and the methyl hydrogen silicone oil are subjected to secondary hydrolysis to form the paper gypsum board with waterproof surface.
According to the invention, the device for rolling the methyl hydrogen-containing silicone oil mixed in the alkaline aqueous solution is arranged in front of the forming table in the process of conveying the lower facing paper, so that the lower facing paper is processed, the gypsum board is normally formed after the lower facing paper is processed, and is dried after the forming, the forming of the hydrophobic film on the gypsum board is realized while the finished gypsum board is obtained, the preparation steps are simple, the device is simple to install, only one step is added, and the production cost is saved.
Since the lower facing paper is required to be fully coated with the methyl hydrogen-containing silicone oil, after a plurality of tests are carried out, the fact that the methyl hydrogen-containing silicone oil is only coated on a plane in a roller coating mode can lead to uneven distribution of the methyl hydrogen-containing silicone oil is found, in order to enable the distribution of the methyl hydrogen-containing silicone oil to be more uniform, a roll printer 6 is arranged between the paper roll frame 1 and the forming table 3, the roll printer 6 is used for applying roll printing to the lower facing paper, and the lower facing paper is in a tiling state when the lower facing paper passes through the roll printer 6.
In particular, the height of the roll printer 6 is higher than that of the paper roll frame 1, the lower facial tissues climb upwards to form an inclined area when passing through the roll printer 6, the lower facial tissues in the inclined area are subjected to inclined upward tensile force, and the roller coating equipment 2 is arranged in the inclined area and is in pressure contact with the lower facial tissues in the inclined area, so that methyl hydrogen-containing silicone oil can be more uniformly distributed on the surface of the lower facial tissues during roller coating, and the influence of roller pressure is avoided.
Further, the roll coating device 2 comprises a roller 201 arranged between the roll printing machine 6 and the paper roll frame 1, the roller 201 is used for being attached to the lower facial tissue arranged in the inclined area and arranged above the lower facial tissue, and when the lower facial tissue moves upwards under the tensile force, the lower facial tissue drives the roller 201 to rotate.
The roller 201 is connected with a feeding component 202, and the feeding component 202 is used for feeding the roller 201 to enable the surface of the roller 201 to be provided with methyl hydrogen silicone oil mixed in alkaline solution, and the methyl hydrogen silicone oil on the roller 201 is roll-coated on the lower facing paper when the lower facing paper passes through the roller 201.
When lower facial tissue receives pulling force and upwards moves, roller 201 and lower facial tissue laminating, lower facial tissue receives the power of two directions this moment, and one is ascending pulling force, and one is the pressure of roller 201, need not to carry out accurate setting and calculation to the pressure of roller 201 this moment, and lower facial tissue can be along with the automatic deformation of change of pressure to make and scribble more evenly, reduced the acquisition and the setting cost of device.
Specifically, the roller 201 includes a bracket 2011 installed between the roll printing machine 6 and the paper roll frame 1, a roller 2012 is rotatably arranged on the bracket 2011, a brush layer 2013 is installed on the outer wall of the roller 2012 in a sleeved mode, and the brush layer 2013 is connected with the feed supplement component 202 and is used for absorbing methyl hydrogen silicone oil.
The brush layer 2013 is attached to the lower facial tissue located in the inclined area, the brush layer 2013 applies downward pressure perpendicular to the inclined direction of the lower facial tissue to the lower facial tissue, and when the lower facial tissue moves, the brush layer 2013 drives the roller 2012 to rotate on the bracket 2011 under the action of friction force, and meanwhile methyl hydrogen-containing silicone oil on the brush layer 2013 is smeared on the surface of the lower facial tissue.
The feed assembly 202 is used to deliver methyl hydrogen silicone oil to the brush layer 2013 to enable the methyl hydrogen silicone oil to be delivered to the lower facing paper, but when the methyl hydrogen silicone oil is delivered, if the brush layer 2013 absorbs unevenly, uneven painting can also result. In order to solve the problem of uniformity of the brush layer 2013 when absorbing solution, the material supplementing component 202 comprises a shell 2021 semi-surrounding the outer wall of the brush layer 2013, two sides of the shell 2021 are fixedly arranged on a bracket 2011, the shell 2021 is connected with a material feeding pipe 2022, the material feeding pipe 2022 is used for introducing methyl hydrogen silicone oil into the shell 2021, and a material feeding groove for the methyl hydrogen silicone oil to remain is arranged in the shell 2021.
Wherein, in the static state, one side of the brush layer 2013 can pass through the shell 2021 to contact with the lower facing paper, the bottom of the brush layer 2013 is arranged in the feeding groove and contacts with methyl hydrogen silicone oil remained in the feeding groove, and when rotating, the brush layer 2013 contacts with the surface of the lower facing paper after uniformly absorbing the methyl hydrogen silicone oil, thereby realizing uniform material supplementing and roller coating.
In order to prevent excessive methyl hydrogen silicone oil from accumulating on the lower facial tissues, two sides of the bracket 2011 are rotatably provided with supporting rods 7, the two supporting rods 7 are connected through a scraping plate 8, the scraping plate 8 is arranged on the lower facial tissues in a sliding manner, the scraping plate 8 is positioned at the upstream of the brush layer 2013, and the scraping plate 8 is used for scraping off the excessive methyl hydrogen silicone oil which is not formed into a film. The shaded locations within the housing 2021 are methyl hydrogen silicone oil that is replenished.
In order to prevent the brush layer 2013 from not having enough friction force to stop rotating, the bracket 2011 is provided with a rotating motor 9, the rotating motor 9 is connected with the roller 2012, and the rotating motor 9 is used for driving the roller 2012 to rotate.
Through the preparation method and the system of the paper-surface gypsum board with the waterproof surface, the water vapor in the board core can be fully utilized in the high-temperature drying process of the gypsum board, the influence of the water vapor on the bonding between the lower facing paper and the gypsum board is prevented, the bonding effect between the gypsum board and the lower facing paper can be improved, the cracking of the lower facing paper is prevented, and the performance of the gypsum board is improved.
The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application, the scope of which is defined by the claims. Various modifications and equivalent arrangements may be made to the present application by those skilled in the art, which modifications and equivalents are also considered to be within the scope of the present application.
Claims (10)
1. The preparation method of the paper gypsum board with waterproof surface is characterized by comprising the following steps:
introducing methyl hydrogen-containing silicone oil mixed in an alkaline aqueous solution to roller coating equipment;
coating the methyl hydrogen-containing silicone oil on the upper surface of the lower facing paper which is about to pass through a forming table through the roller coating equipment, and forming a waterproof film on the lower facing paper after Si-H in the methyl hydrogen-containing silicone oil is hydrolyzed;
spraying gypsum paste on the lower facing paper containing the waterproof membrane, and performing preliminary molding on the waterproof lower facing paper containing the gypsum paste through the molding table to obtain a primary gypsum board;
drying the primary gypsum board to obtain a paper gypsum board with a waterproof surface;
wherein, during the drying process, si-H in the methyl hydrogen-containing silicone oil is further hydrolyzed, so that the waterproof film forms a surface hydrophobic film on the board core of the primary gypsum board.
2. A process for the preparation of a surface-waterproofing paper gypsum board as claimed in claim 1, wherein,
the methyl hydrogen-containing silicone oil is subjected to distributed hydrolysis on the upper facial tissue;
when the methyl hydrogen silicone oil is fully coated on the surface of the upper facial tissue, the methyl hydrogen silicone oil is primarily hydrolyzed, namely Si-H is primarily hydrolyzed into Si-OH groups, and the Si-OH groups are combined with the fibers of the upper facial tissue to form a primary waterproof film;
when the primary gypsum board is dried, the remaining Si-H is secondarily hydrolyzed to Si-OH groups, which are further combined with the upper facing paper fiber to form a secondary waterproof film.
3. The method for producing a surface-waterproofing paper gypsum board according to claim 2, further comprising the steps of, in the secondary hydrolysis process:
in the drying process, the Si-OH groups form a stable-Si-O-covalent network through self-polycondensation to cover the surface of the board core of the primary gypsum;
the core of the primary gypsum board containing the-Si-O-covalent network is combined with the upper facing paper containing the secondary waterproofing membrane to form a gypsum board having a surface that is waterproof.
4. A system for preparing a surface-waterproofing paper gypsum board, characterized in that the preparation system comprises, in the order of preparation, as shown in the preparation method of the surface-waterproofing paper gypsum board according to any one of claims 1 to 3:
the device comprises a paper roll frame (1), roller coating equipment (2), a forming table (3) and a dryer (4); the paper roll frame (1), the roller coating equipment (2), the forming table (3) and the dryer (4) are connected through a conveying device (10);
the paper roll frame (1) is used for installing lower facing paper;
the roller coating equipment (2) is arranged between the paper roll frame (1) and the forming table (3), the roller coating equipment (2) is used for fully coating methyl hydrogen-containing silicone oil mixed in an alkaline aqueous solution on the surface of the lower facing paper, and the methyl hydrogen-containing silicone oil can be subjected to preliminary hydrolysis on the surface of the lower facing paper to form a primary waterproof film;
the forming table (3) is provided with a discharging machine (5), the discharging machine (5) is used for spraying gypsum paste on the surface of lower facing paper passing through the forming table (3), and the forming table (3) is used for carrying out preliminary forming on the lower facing paper containing the gypsum paste and obtaining a primary gypsum board;
the dryer (4) is used for drying the primary gypsum board at a high temperature, and in the drying process, the steam evaporation in the primary gypsum board core and the methyl hydrogen-containing silicone oil are subjected to secondary hydrolysis to form the paper gypsum board with waterproof surface.
5. A system for preparing a gypsum board with a waterproof surface as set forth in claim 4, wherein,
a roll printing machine (6) is arranged between the paper roll frame (1) and the forming table (3), the roll printing machine (6) is used for applying roll printing to the lower facial tissues, and the lower facial tissues are in a tiling state when the lower facial tissues pass through the roll printing machine (6);
the height of the roll printing machine (6) is higher than that of the paper roll frame (1), the lower facial tissues climb upwards to form an inclined area when passing through the roll printing machine (6), the lower facial tissues located in the inclined area are subjected to inclined upward tensile force, and the roller coating equipment (2) is installed in the inclined area and is in pressure contact with the lower facial tissues in the inclined area.
6. A system for preparing a gypsum board with a waterproof surface as set forth in claim 5, wherein,
the roller coating device (2) comprises a roller (201) arranged between the roller printing machine (6) and the paper roll frame (1), the roller (201) is used for being attached to the lower facial tissue arranged in the inclined area and arranged above the lower facial tissue, and when the lower facial tissue moves upwards under the tensile force, the lower facial tissue drives the roller (201) to rotate;
the roller (201) is connected with a feeding component (202), the feeding component (202) is used for feeding the roller (201) so that methyl hydrogen silicone oil mixed in alkaline solution is arranged on the surface of the roller, and when the lower facial tissue passes through the roller (201), the methyl hydrogen silicone oil on the roller (201) is roll-coated on the lower facial tissue.
7. A system for preparing a gypsum board with a waterproof surface as set forth in claim 6, wherein,
the roller (201) comprises a bracket (2011) arranged between the roll printing machine (6) and the paper roll frame (1), a roller (2012) is rotatably arranged on the bracket (2011), a brush layer (2013) is sleeved on the outer wall of the roller (2012), and the brush layer (2013) is connected with the feed supplement component (202) and is used for absorbing the methyl hydrogen-containing silicone oil;
the brush layer (2013) is attached to the lower facial tissues located in the inclined area, the brush layer (2013) applies pressure vertically downwards to the lower facial tissues in the inclined direction of the lower facial tissues, and when the lower facial tissues move, the brush layer (2013) drives the roller (2012) to rotate on the bracket (2011) under the action of friction force, and meanwhile methyl hydrogen-containing silicone oil on the brush layer (2013) is smeared on the surface of the lower facial tissues.
8. A system for preparing a surface waterproofing paper gypsum board as set forth in claim 7, wherein,
the feeding component (202) comprises a shell (2021) semi-surrounded on the outer wall of the hairbrush layer (2013), two sides of the shell (2021) are fixedly arranged on the bracket (2011), the shell (2021) is connected with a feeding pipe (2022), the feeding pipe (2022) is used for introducing methyl hydrogen silicone oil into the shell (2021), and a feeding groove for the methyl hydrogen silicone oil to remain is arranged in the shell (2021);
wherein, in the static state, one side of brush layer (2013) can pass shell (2021) with lower facial tissue contact, the bottom of brush layer (2013) sets up in the material loading inslot and with methyl hydrogen silicone oil that remains in it contacts, and during the rotation, brush layer (2013) is after absorbing methyl hydrogen silicone oil with lower facial tissue's surface contact.
9. A system for preparing a surface waterproofing paper gypsum board as set forth in claim 8, wherein,
the two sides of the bracket (2011) are rotatably provided with supporting rods (7), the two supporting rods (7) are connected through scraping plates (8), the scraping plates (8) are arranged on the lower facial tissues in a sliding mode, and the scraping plates (8) are located at the upstream of the hairbrush layer (2013).
10. A system for preparing a surface waterproofing paper gypsum board as set forth in claim 7, wherein,
be provided with rotation motor (9) on support (2011), rotation motor (9) with cylinder (2012) are connected, rotation motor (9) are used for driving cylinder (2012) rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311394135.6A CN117415941A (en) | 2023-10-25 | 2023-10-25 | Preparation method and system of paper gypsum board with waterproof surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311394135.6A CN117415941A (en) | 2023-10-25 | 2023-10-25 | Preparation method and system of paper gypsum board with waterproof surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117415941A true CN117415941A (en) | 2024-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311394135.6A Pending CN117415941A (en) | 2023-10-25 | 2023-10-25 | Preparation method and system of paper gypsum board with waterproof surface |
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| Country | Link |
|---|---|
| CN (1) | CN117415941A (en) |
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2023
- 2023-10-25 CN CN202311394135.6A patent/CN117415941A/en active Pending
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