CN108755268A - A kind of moisture-proof coating of paper grade (stock), asphalt board and preparation method thereof - Google Patents
A kind of moisture-proof coating of paper grade (stock), asphalt board and preparation method thereof Download PDFInfo
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- CN108755268A CN108755268A CN201810534146.2A CN201810534146A CN108755268A CN 108755268 A CN108755268 A CN 108755268A CN 201810534146 A CN201810534146 A CN 201810534146A CN 108755268 A CN108755268 A CN 108755268A
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-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/10—Packing paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/385—Oxides, hydroxides or carbonates
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H19/58—Polymers or oligomers of diolefins, aromatic vinyl monomers or unsaturated acids or derivatives thereof
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
- D21H25/04—Physical treatment, e.g. heating, irradiating
- D21H25/06—Physical treatment, e.g. heating, irradiating of impregnated or coated paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/30—Multi-ply
Abstract
This application discloses a kind of moisture-proof coatings of paper grade (stock), asphalt board and preparation method thereof, are related to pulp technology for making paper.The paper grade (stock) moisture-proof coating includes：The sheet size of 40~100 parts of pigment, 30-100 parts of latex and 0.1-1.6 parts of graphene, the graphene is 1-15 μm, and average thickness is 0.35~5.4nm.By the way that graphene is added into moisture-proof coating, the barrier property of coating is improved using the shielding properties of graphene, it being capable of blocking oxygen, hydrone etc.；When the moisture-proof coating is coated on cardboard, the humidity resistance of cardboard can be promoted.
Description
Technical field
This application involves pulp technology for making paper, more particularly to a kind of moisture-proof coating of paper grade (stock), asphalt board and its system
Preparation Method.
Background technology
Continuous upgrading with people to packing technique demand has more requirements, especially for top grade to wrapping paper
Packaging, high-grade wrapping paper other than requiring coating that can assign the basic exquisite printing effect of cardboard, also according to special packaging or
Process requirements and require coating that there is certain conduction, antibacterial, barrier protection performance etc..
Present inventor has found that most separated packaging material is added by rear in the market in long-term R&D process
Work promotes its barrier property in the method for paperboard surface overlay film.Such as the resistance of steam is obtained by PE laminations or cladded aluminum foil
Separating performance.But PE and aluminium foil are all the materials of difficult recycling, and not environmentally, and post-processing is needed, cumbersome, cost is higher.
It would therefore be highly desirable to need to develop new method to improve the barrier property of wrapping paper.
Invention content
The application is mainly solving the technical problems that provide a kind of moisture-proof coating of paper grade (stock), asphalt board and its preparation side
Method can improve the moisture-proof barrier property of cardboard.
In order to solve the above technical problems, the technical solution that the application uses is：A kind of moisture-proof painting of paper grade (stock) is provided
Material, the moisture-proof coating include：40~100 parts of pigment, 30-100 parts of latex and 0.1-1.6 parts of graphene, graphene
Sheet size is 1-15 μm, and average thickness is 0.35~5.4nm.
Wherein, the sheet size of graphene is 1-15 μm, and average thickness is 0.35~5.4nm.
Wherein, pigment includes sheet soil, and the grain size accounting that 2um is less than in sheet soil is 75-90%.
Wherein, latex includes styrene-butadiene latex, and the grain size of styrene-butadiene latex is 120-160nm, glass transition temperature 5-15
Degree.
Wherein, moisture-proof coating further includes：0.0-0.5 parts of thickener, 0.2-0.5 parts of dispersant, 0.2-0.5 parts of profit
Lubrication prescription, 0.5-2.0 parts of resistance to hydrated agent, 0.05-0.2 parts of pH adjusting agent.
Wherein, the solid content of moisture-proof coating is 53-62%.
In order to solve the above technical problems, another technical solution that the application uses is：A kind of moisture-proof painting of paper grade (stock) is provided
The preparation method of material, the preparation method of the moisture-proof coating include providing graphene, pigment and the latex of predetermined amount；Graphene is starched
Material carries out pre-dispersed；Finely dispersed graphene solution is added in pigment dispersing solution and is disperseed to obtain graphene face
Material；Latex is added in graphene pigment and is disperseed to obtain moisture-proof coating, gained moisture-proof coating includes：40~100 parts
The sheet size of pigment, 30-100 parts of latex and 0.1-1.6 parts of graphene, graphene is 1-15 μm, and average thickness is
0.35~5.4nm.
Wherein, finely dispersed graphene solution is added in pigment dispersing solution and then is added into mixed solution
Enter powder pigment, continues dispersion and obtain graphene pigment.
In order to solve the above technical problems, another technical solution that the application uses is：A kind of asphalt board is provided, it is moisture-proof
Cardboard includes original paper layer and dope layer, and dope layer includes moisture-proof coating, and moisture-proof coating includes：40~100 parts of pigment, 30-100
The sheet size of the latex and 0.1-1.6 parts of graphene of part, graphene is 1-15 μm, and average thickness is 0.35~5.4nm.
Wherein, the moisture permeability of asphalt board is 500~1000g/m2*24h。
In order to solve the above technical problems, another technical solution that the application uses is：A kind of system of asphalt board is provided
Preparation Method, the method includes：Moisture-proof coating is provided, moisture-proof coating includes：40~100 parts of pigment, 30-100 parts of latex
Sheet size with 0.1-1.6 parts of graphene, graphene is 1-15 μm, and average thickness is 0.35~5.4nm；Body paper is provided,
It is coated with moisture-proof coating in at least one side of body paper, wherein the coating weight of single side is 12-20g/m2；Cardboard after coating is dry,
Press polish obtains asphalt board.
The advantageous effect of the application is：The case where being different from the prior art, the application provide a kind of moisture-proof painting of paper grade (stock)
Material, by the way that graphene is added into moisture-proof coating, the barrier property of coating is improved using the shielding properties of graphene, can be hindered
Oxygen barrier gas and water molecule etc.；When the moisture-proof coating is coated on cardboard, the humidity resistance of cardboard can be promoted.
Description of the drawings
Fig. 1 is the structural schematic diagram of graphene first embodiment used herein；
Fig. 2 is the flow diagram of the preparation method first embodiment of the application moisture-proof coating；
Fig. 3 is the structural schematic diagram of the application asphalt board first embodiment；
Fig. 4 is the structural schematic diagram of the application asphalt board second embodiment；
Fig. 5 is the flow diagram of the application asphalt board preparation method first embodiment；
Fig. 6 is the application moisture-proof coating moisture permeability trend chart.
Specific implementation mode
To keep the purpose, technical solution and effect of the application clearer, clear, develop simultaneously embodiment pair referring to the drawings
The application is further described.
The application provides a kind of moisture-proof coating, is at least applied to paper industry, is coated on paper surface, can improve cardboard
Humidity resistance.In one embodiment, moisture-proof coating includes：40~100 parts of pigment, 30-100 parts of latex and 0.1-
1.6 parts of graphene.In the moisture-proof coating, other than main pigment and latex component, graphene is also added, utilizes graphite
The shielding properties of alkene improves the barrier property of coating, being capable of blocking oxygen, hydrone etc..Wherein, the additive amount of graphene is
0.1-1.6 parts, such as 0.1 part, 0.3 part, 0.5 part, 0.8 part, 1.2 parts, 1.6 parts etc..
Specifically, referring to Fig. 1, Fig. 1 is the structural schematic diagram of graphene first embodiment used herein.Wherein,
Graphene is the two-dimensional material for having individual layer laminated structure, and only there are one atomic diameter sizes for the thickness of single-layer graphene (about
0.35nm), single layer zero defect graphite ene coatings have excellent shielding properties, energy blocking oxygen, hydrone, it is considered to be known
Most thin protective coating.It cannot be totally separated from out single-layer graphene, graphene film used herein in view of current manufacture craft
Shape size is 1-15 μm, and average thickness is 0.35~5.4nm.
In this embodiment, by mixing graphene and papermaking pigments, adhesive, application and preparation is in field of papermaking
Graphene water-thinned nanometer paint, the humidity resistance of cardboard can be promoted after which is coated on cardboard.
But since graphene specific surface area itself is huge, it is easy to happen reunion, simultaneously because graphene hydrophobicity is strong,
It is poor with the compatibility of water paint so that graphene is difficult to disperse in water paint, and the effect of graphene is also difficult to fully
It plays.The moisture-proof coating of paper grade (stock) provided herein increases the content of graphene, and aqueous point of high concentration graphene is made
Slurry is dissipated, while on-chemically modified is carried out to grapheme material surface, can either ensure the excellent physical property of grapheme material
It is not destroyed, and the compatibility of graphene and aqueous solution can be promoted, improve the dispersion performance of graphene in aqueous solution, improve
The solid content of graphene in aqueous dispersion slurry, while the redispersibility of the graphene aqueous dispersion slurry in aqueous solution can be excellent
Different, graphene platelet degree of scatter is high, has given full play to the excellent properties of graphene.
Specifically, paint coatings are determined the barrier of steam by two parts factor, when the polarity of coating, second is that coating
Hole.
Wherein, the polarity of coating is determined by raw material used and coating main body.Coating provided herein is moisture-proof
Coating needs the obstructing capacity for having certain to hydrone, thus selection latex when, should select hydrophilic radical poor as possible at
Point；But the moisture-proof coating or water paint, and graphene itself is hydrophobic surface, in order to make water paint
In all raw materials all have certain aqueous dispersion, form stable water-borne dispersions, also needed in latex with a small amount of
Hydrophilic radical, or a small amount of aqueous monomers are added into system, with the stability for ensureing coating and upper machine runnability.And coating
Hole is affected by the proportioning of pigment used, latex and related auxiliaries, and wherein pigment need to have preferable distribution and arrangement, from
And there is finer and close coat of colo(u)r；Film forming matter of the latex as filler pigment gap, need to be filled up completely pigment gap could have
Preferable barrier property.
In summary two kinds of factors should be weighed when selecting paint ingredient and dosage and graphene can either be allowed in water paint
Uniformly disperse in system, be finally uniformly distributed in the coating, should also reduce intergranular gap, reduces steam infiltration, carry
Rise the water vapor rejection performance of cardboard.
Optionally, pigment can be grinding calcium carbonate, winnofil, talcum powder, carclazyte, china clay, sheet soil, titanium dioxide
At least one of titanium, mica powder, silica flour.Latex is vinyl acetate latex, styrene-butadiene latex, styrene-butadiene latex, carboxylic
At least one of base styrene-butadiene latex, vinyl acetate-acrylate latex.Wherein, Experimental comparison's grinding calcium carbonate
(GCC95), the barrier property of china clay (96 grades or more), sheet native (70-95 grades), it is found that the radius-thickness ratio of coating particle obstructs it
Performance has a certain impact, and the higher pigment of radius-thickness ratio has preferable barrier property.Such as can select morphological feature for
The sheet soil of high radius-thickness ratio, and when the grain size accounting for being less than 2um in sheet soil is 75-90%, barrier property is more preferable.And latex
It can then select to have preferable film forming and hydrophilic radical content is appropriate and can be sufficient filling with the ingredient in pigment gap, example
Such as：Select grain size for styrene-butadiene latex that 120-160nm, glass transition temperature are 5-15 degree.
In addition, in addition to the pigment and latex on basis, the adding ingredient and additive amount of other auxiliary agents also can be to the barriers of coating
Performance has an impact.Optionally, in one embodiment, which further includes：0.0-0.5 parts of thickener, 0.2-0.5 parts
Dispersant, 0.2-0.5 parts of lubricant, 0.5-2.0 parts of resistance to hydrated agent, 0.05-0.2 parts of pH adjusting agent etc..By adding
Add multiple additives that can adjust the overall performance of moisture-proof coating.In other embodiments, it can also include more additives,
Such as fungicide, at least one of isothiazolinone and its derivative, three red oil, nitrogen, sulphur cyclic organic compounds are specifically included.
Optionally, thickener is bentonite, diatomite, attapulgite, alumina silicate, sodium carboxymethylcellulose, polyurethane, change
Property amide copolymer, modified acrylic acid terpolymer etc.；Dispersant is polyphosphate, the polypropylene such as calgon, sodium pyrophosphate
Sour sodium, carboxylate etc.；Lubricant be fatty acid amide, oleic acid, polyester, synthetic ester, carboxylic acid, polyethylene glycol, aliphatic acid antifoaming agent,
Silica-based, mineral oil, polyethylene wax, high-carbon fatty alcohol, tributyl phosphate, emulsification methyl-silicone oil etc.；PH adjusting agent is hydrogen
Sodium oxide molybdena, sodium sesquicarbonate, disodium hydrogen phosphate etc..
For above-mentioned moisture-proof coating is made, the application also provides a kind of preparation method of moisture-proof coating, referring specifically to Fig. 2,
Fig. 2 is the flow diagram of the preparation method first embodiment of the application moisture-proof coating.In this embodiment, this method packet
Include following steps：
S201：Graphene, pigment and the latex of predetermined amount are provided.
Specifically, prepare graphene, pigment and the latex of predetermined ratio according to each component content of required coating.
S202：Graphene slurry is disperseed.
Specifically, graphene slurry is disperseed in predefined conditions, for example, disperseing under the rotating speed of 400rpm/min
30min.In other embodiments, other speed conditions can also be selected, and adaptability selects jitter time.
S203：Finely dispersed graphene solution is added in pigment dispersing solution and is disperseed to obtain graphene face
Material.
Specifically, first pigment slurry is disperseed to obtain dispersible pigment dispersion；Finely dispersed graphene slurry is added again
Enter into pigment dispersing solution, continues dispersion and obtain finely dispersed graphene pigment.
Wherein, since the solid content of graphene solution is when reaching certain value, solution mobility is particularly poor, is unfavorable for uniformly
The solid content of dispersion, the graphene solution slurry after dispersion used herein is 2~3%.In order to ensure consolidating for final coating
Content after finely dispersed graphene solution is added in pigment dispersing solution, then is gradually added into face into mixed solution
Feed powder body carries out the dispersion of pigment.In this way, the moisture contained by graphene slurry can be borrowed to participate in pigment powder
Dispersion, improve the solid content of coating, the physical action of the collision friction of particle in pigment dispersion can also be utilized stone
Black alkene is preferably dispersed in pigments system.
S204：Latex is added in graphene pigment and is disperseed to obtain moisture-proof coating.
Wherein, gained moisture-proof coating includes 40~100 parts of pigment, 30-100 parts of latex and 0.1-1.6 parts of graphite
The solid content of alkene, gained moisture-proof coating is 53-62%.
Optionally, in one embodiment, graphene used in moisture-proof coating is in conjunction with chemical reduction method and physics stripping method
It is obtained, it can ensure the integrality of graphene physicalchemical structure by physical method, system can be improved by chemical method
The sheet size of standby efficiency, obtained graphene is 1-15nm, and average thickness is 0.35~5.4nm.
It optionally, in one embodiment, can also be as needed while latex is added in graphene pigment
Other auxiliary agents are added, so that gained coating has better overall performance.
Moisture-proof coating provided herein, which is coated on paper surface, can be made the good asphalt board of humidity resistance.
Specifically, referring to Fig. 3, Fig. 3 is the structural schematic diagram of the application asphalt board first embodiment；In this embodiment,
Asphalt board 30 includes original paper layer 301 and dope layer 302, and dope layer 302 includes moisture-proof coating, and moisture-proof coating includes：40~100
The pigment, 30-100 parts of latex and 0.1-1.6 parts of graphene of part.Specifically moisture-proof coating component ratio please refers to above-mentioned reality
The description of mode is applied, details are not described herein.
Optionally, in one embodiment, it is only necessary to moisture-proof coating is coated in a face of original paper layer 301, it is general to coat
At the back side of cardboard, make cardboard that there is humidity resistance, and the another side of original paper layer can select and apply other coating as needed, to protect
Demonstrate,prove basic and other performances of cardboard.Referring to Fig. 4, Fig. 4 is the structural schematic diagram of the application asphalt board second embodiment,
In this embodiment, asphalt board 40 includes original paper layer 401, moisture-proof coating layer 402, top sizing layer 403, pre- coating layer
404, face coating layer 405, wherein moisture-proof coating layer 402 are located at the back side of original paper layer 401, are conducive to the moisture-proof barrier for improving cardboard
Performance, and the front of cardboard can normally coat other coatings, to ensure the basic of cardboard and other performances.
Asphalt board provided herein is in addition to most basic smoothness, outside roughness, glossiness, having good
Humidity resistance, after tested, moisture permeability be 500~1000g/m2* for 24 hours, relatively existing conventional paperboard, the barrier to steam
Capability improving 20~50%.
Wherein, the test of moisture permeability is carried out using cup type method, the specific method is as follows：
Drier is put into clean cup ware, addition makes drier be advisable away from specimen surface 3mm.
The cup ware for filling drier is put into moisture-inhibiting cup, then sample is put on glass platform.Guider ring is removed, will be melted
The groove that the sealing wax melted pours cup is sealed.
Moisture vapor transmission cup is put into drier, is weighed after balancing 30min.
Moisture vapor transmission cup is put into after weighing in the climatic chamber for having mixed up temperature (38 DEG C), humidity (90%), is taken out after 6h
It is put into drier, after balancing 30min, is weighed.
It repeats the above steps, until when front and back amount increment difference is less than 5%, can terminate to test.
Finally moisture permeability calculating is carried out using following formula：
WVTR=(M2-M1)/(T×S)24h
Wherein, WVTR is moisture-vapor transmission (g/m2×24h)；M1For moisture vapor transmission cup weight (g) before humidification；M2After humidification
Moisture vapor transmission cup weight (g)；T is test period (h)；S is moisture vapor transmission cup area (m2)。
For above-mentioned asphalt board is made, the application also provides a kind of preparation method of asphalt board, referring to Fig. 5, Fig. 5 is
The flow diagram of the application asphalt board preparation method first embodiment.In this embodiment, asphalt board preparation side
Method includes：
S501：Moisture-proof coating is provided.
Wherein, moisture-proof coating includes：40~100 parts of pigment, 30-100 parts of latex and 0.1-1.6 parts of graphene.
Concrete component content and preparation method please refer to the description of the above embodiment, and details are not described herein.
S502：Body paper is provided, is coated with moisture-proof coating in at least one side of body paper, wherein the coating weight of single side is 12-20g/
m2。
Wherein the preparation of body paper can be made with the prior art, or directly be bought, and not limited herein.It will be well prepared in advance
Moisture-proof coating be coated on body paper surface, be adapted to selection coating method coated, such as by scrape rod coating in the way of into
Row coating.The coating weight of its single side is 12-20g/m2。
S503：By the cardboard after coating, dry, press polish, obtains asphalt board.
Above scheme improves coating by the way that graphene is added into moisture-proof coating using the shielding properties of graphene
Barrier property, being capable of blocking oxygen, hydrone etc.；The moisture resistance of cardboard is promoted when the moisture-proof coating is coated on cardboard in turn
Energy.
Below the application will be illustrated, explained by several groups of specific experiment examples and contrast experiment's example, but do not applied
To limit scope of the present application.
First, to obtain preferable graphene additive amount, the dosage of graphene is screened.
Comparative example 1：
Sheet soil, 40 parts of latex, 0.1 part of sodium hydroxide, 0.05 part of thickener, 0.3 part of point of 100 parts of preparation
Powder, 0.3 part of lubricant, 0.5 part of resistance to hydrated agent.
Sheet soil paste material is disperseed into 30min under the rotating speed of 400rpm/min, then latex, each additive are added sequentially to
In sheet soil dispersion liquid, dispersion 30min obtains coating finished product, coating solids 53-62%.By the coating to scrape the side of rod coating
Formula is coated in the back side of paper, and one side coating amount is 15g/m2, control coating is uniformly.It is dry after coating, and to gained cardboard into
Row moisture permeability is tested, and specific test result is shown in Table 1.
Experimental example 1：
The sheet soil of 100 parts of preparation, 40 parts of latex, 0.2 part of graphene, 0.1 part of sodium hydroxide, 0.05 part of increasing
Thick dose, 0.3 part of dispersant, 0.3 part of lubricant, 0.5 part of resistance to hydrated agent.
Graphene slurry is disperseed into 30min under the rotating speed of 400rpm/min, scattered graphene solution is added to
Sheet soil disperses in solution, sheet soil powder is then added carries out dispersion stirring 1h and prepare graphene pigment, then by latex, respectively add
Agent is added to be added sequentially in graphene pigment, dispersion 30min obtains coating finished product, coating solids 53-62%.By the coating with
The mode for scraping rod coating is coated in the back side of paper, and one side coating amount is 15g/m2, control coating is uniformly.It is dry after coating, and
Moisture permeability test is carried out to gained cardboard, specific test result is shown in Table 1.
Experimental example 2：
The sheet soil of 100 parts of preparation, 40 parts of latex, 0.4 part of graphene, 0.1 part of sodium hydroxide, 0.05 part of increasing
Thick dose, 0.3 part of dispersant, 0.3 part of lubricant, 0.5 part of resistance to hydrated agent.
Graphene slurry is disperseed into 30min under the rotating speed of 400rpm/min, scattered graphene solution is added to
Sheet soil disperses in solution, sheet soil powder is then added carries out dispersion stirring 1h and prepare graphene pigment, then by latex, respectively add
Agent is added to be added sequentially in graphene pigment, dispersion 30min obtains coating finished product, coating solids 53-62%.By the coating with
The mode for scraping rod coating is coated in the back side of paper, and one side coating amount is 15g/m2, control coating is uniformly.It is dry after coating, and
Moisture permeability test is carried out to gained cardboard, specific test result is shown in Table 1.
Experimental example 3：
The sheet soil of 100 parts of preparation, 40 parts of latex, 0.8 part of graphene, 0.1 part of sodium hydroxide, 0.05 part of increasing
Thick dose, 0.3 part of dispersant, 0.3 part of lubricant, 0.5 part of resistance to hydrated agent.
Graphene slurry is disperseed into 30min under the rotating speed of 400rpm/min, scattered graphene solution is added to
Sheet soil disperses in solution, sheet soil powder is then added carries out dispersion stirring 1h and prepare graphene pigment, then by latex, respectively add
Agent is added to be added sequentially in graphene pigment, dispersion 30min obtains coating finished product, coating solids 53-62%.By the coating with
The mode for scraping rod coating is coated in the back side of paper, and one side coating amount is 15g/m2, control coating is uniformly.It is dry after coating, and
Moisture permeability test is carried out to gained cardboard, specific test result is shown in Table 1.
Experimental example 4：
The sheet soil of 100 parts of preparation, 40 parts of latex, 1.6 parts of graphene, 0.1 part of sodium hydroxide, 0.05 part of increasing
Thick dose, 0.3 part of dispersant, 0.3 part of lubricant, 0.5 part of resistance to hydrated agent.
Graphene slurry is disperseed into 30min under the rotating speed of 400rpm/min, scattered graphene solution is added to
Sheet soil disperses in solution, sheet soil powder is then added carries out dispersion stirring 1h and prepare graphene pigment, then by latex, respectively add
Agent is added to be added sequentially in graphene pigment, dispersion 30min obtains coating finished product, coating solids 53-62%.By the coating with
The mode for scraping rod coating is coated in the back side of paper, and one side coating amount is 15g/m2, control coating is uniformly.It is dry after coating, and
Moisture permeability test is carried out to gained cardboard, specific test result is shown in Table 1.
Table 1：Comparative example 1 and each parametric data tables of embodiment 1-4
It can be seen that from above-mentioned detection data and gradually promoted with the dosage of graphene in coating, the moisture permeability of cardboard is in
Downward trend, cardboard obstruct the capability improving of steam.Specific variation tendency please refers to attached drawing 6, and Fig. 6 is the application moisture-proof coating
Moisture permeability trend chart.
Then, moisture-proof coating provided herein and existing coating are subjected to contrast experiment, to verify moisture-proof coating
Barrier property.
Comparative example 2：
Prepare 80 parts of calcium carbonate, 20 parts of sheet soil, 15 parts of latex, 0.1 part of sodium hydroxide, 0.3 part of dispersion
Agent, 0.3 part of lubricant, 0.15 part of resistance to hydrated agent.
Calcium carbonate and sheet soil paste material are disperseed into 30min under the rotating speed of 400rpm/min, then by latex, each additive according to
Secondary to be added in dispersible pigment dispersion, dispersion 30min obtains coating finished product, coating solids 53-62%.By the coating to scrape rod coating
The mode of cloth is coated in the back side of paper, and one side coating amount is 15g/m2, control coating is uniformly.It is dry after coating, and to gained
Cardboard carries out moisture permeability test, and specific test result is shown in Table 2.
Comparative example 3：
Prepare 80 parts of calcium carbonate, 20 parts of sheet soil, 15 parts of latex, 0.1 part of sodium hydroxide, 0.1 part of thickening
Agent, 0.3 part of dispersant, 0.3 part of lubricant, 0.1 part of resistance to hydrated agent.
Calcium carbonate and sheet soil paste material are disperseed into 30min under the rotating speed of 400rpm/min, then by latex, each additive according to
Secondary to be added in dispersible pigment dispersion, dispersion 30min obtains coating finished product, coating solids 53-62%.By the coating to scrape rod coating
The mode of cloth is coated in the back side of paper, and one side coating amount is 15g/m2, control coating is uniformly.It is dry after coating, and to gained
Cardboard carries out moisture permeability test, and specific test result is shown in Table 2.
Experimental example 5：
Sheet soil, 40 parts of latex, 0.8 part of graphene, 0.1 part of sodium hydroxide, 0.3 part of point of 100 parts of preparation
Powder, 0.3 part of lubricant, 0.15 part of resistance to hydrated agent.
Graphene slurry is disperseed into 30min under the rotating speed of 400rpm/min, scattered graphene solution is added to
Sheet soil disperses in solution, sheet soil powder is then added carries out dispersion stirring 1h and prepare graphene pigment, then by latex, respectively add
Agent is added to be added sequentially in graphene pigment, dispersion 30min obtains coating finished product, coating solids 53-62%.By the coating with
The mode for scraping rod coating is coated in the back side of paper, and one side coating amount is 15g/m2, control coating is uniformly.It is dry after coating, and
Moisture permeability test is carried out to gained cardboard, specific test result is shown in Table 2.
Experimental example 6：
The sheet soil of 50 parts of preparation, 100 parts of latex, 0.8 part of graphene, 0.1 part of sodium hydroxide, 0.1 part of increasing
Thick dose, 0.3 part of dispersant, 0.3 part of lubricant, 0.1 part of resistance to hydrated agent.
Graphene slurry is disperseed into 30min under the rotating speed of 400rpm/min, scattered graphene solution is added to
Sheet soil disperses in solution, sheet soil powder is then added carries out dispersion stirring 1h and prepare graphene pigment, then by latex, respectively add
Agent is added to be added sequentially in graphene pigment, dispersion 30min obtains coating finished product, coating solids 53-62%.By the coating with
The mode for scraping rod coating is coated in the back side of paper, and one side coating amount is 15g/m2, control coating is uniformly.It is dry after coating, and
Moisture permeability test is carried out to gained cardboard, specific test result is shown in Table 2.
Table 2：Comparative example 2-3 and each parametric data tables of experimental example 5-6
It can be seen that from above-mentioned detection data in moisture-proof coating provided herein and add graphene, make cardboard
Moisture permeability reduces, and has to the obstructing capacity of steam and is obviously improved.
Above scheme, moisture-proof coating provided herein utilize graphene by the way that graphene is added into moisture-proof coating
Shielding properties improve the barrier property of coating, being capable of blocking oxygen, hydrone etc.；The moisture-proof coating is coated on cardboard
When so promoted cardboard humidity resistance.
The foregoing is merely presently filed embodiments, are not intended to limit the scope of the claims of the application, every to utilize this
Equivalent structure or equivalent flow shift made by application specification and accompanying drawing content, it is relevant to be applied directly or indirectly in other
Technical field includes similarly in the scope of patent protection of the application.
Claims (10)
1. a kind of moisture-proof coating of paper grade (stock), which is characterized in that the moisture-proof coating includes：40~100 parts of pigment, 30-100
The latex and 0.1-1.6 parts of graphene of part；The sheet size of the graphene be 1-15 μm, average thickness be 0.35~
5.4nm。
2. paper grade (stock) moisture-proof coating according to claim 1, which is characterized in that the pigment includes that sheet is native, described
Grain size accounting in shape soil less than 2um is 75-90%.
3. paper grade (stock) moisture-proof coating according to claim 1, which is characterized in that the latex includes styrene-butadiene latex, described
The grain size of styrene-butadiene latex is 120-160nm, glass transition temperature is 5-15 degree.
4. paper grade (stock) moisture-proof coating according to claim 1, which is characterized in that the moisture-proof coating further includes：0.0-0.5
Part thickener, 0.2-0.5 parts of dispersant, 0.2-0.5 parts of lubricant, 0.5-2.0 parts of resistance to hydrated agent, 0.05-0.2 parts
PH adjusting agent；The solid content of the moisture-proof coating is 53-62%.
5. a kind of preparation method of the moisture-proof coating of paper grade (stock), which is characterized in that the method includes：
Graphene, pigment and the latex of predetermined amount are provided；
Graphene slurry is disperseed；
Finely dispersed graphene solution is added in pigment dispersing solution and is disperseed to obtain graphene pigment；
The latex is added in the graphene pigment and is disperseed to obtain moisture-proof coating, gained moisture-proof coating includes：40
The sheet size of~100 parts of pigment, 30-100 parts of latex and 0.1-1.6 parts of graphene, the graphene is 1-15 μm,
Average thickness is 0.35~5.4nm.
6. the preparation method of paper grade (stock) moisture-proof coating according to claim 5, which is characterized in that it is described will be finely dispersed
Graphene solution, which is added in pigment dispersing solution, to be disperseed to obtain graphene pigment step and includes：
Finely dispersed graphene solution is added in pigment dispersing solution to and then is added into mixed solution pigment powder
Body continues dispersion and obtains graphene pigment.
7. the preparation method of paper grade (stock) moisture-proof coating according to claim 5, which is characterized in that the offer graphene step
Suddenly include：
The graphene is made in conjunction with chemical reduction method and physics stripping method.
8. a kind of asphalt board, which is characterized in that the asphalt board includes original paper layer and dope layer, and the dope layer includes anti-
Damp coating, the moisture-proof coating include：40~100 parts of pigment, 30-100 parts of latex and 0.1-1.6 parts of graphene, institute
The sheet size for stating graphene is 1-15 μm, and average thickness is 0.35~5.4nm.
9. asphalt board according to claim 8, which is characterized in that the moisture permeability of the asphalt board be 500~
1000g/m2*24h。
10. a kind of preparation method of asphalt board, which is characterized in that the method includes：
Moisture-proof coating is provided, the moisture-proof coating includes：40~100 parts of pigment, 30-100 parts of latex and 0.1-1.6 parts
The sheet size of graphene, the graphene is 1-15 μm, and average thickness is 0.35~5.4nm；
Body paper is provided, is coated with the moisture-proof coating in at least one side of the body paper, wherein the coating weight of single side is 12-20g/
m2；
By the cardboard after coating, dry, press polish, obtains asphalt board.
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