CN114606798A - Color paper and preparation method thereof - Google Patents
Color paper and preparation method thereof Download PDFInfo
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- CN114606798A CN114606798A CN202011449396.XA CN202011449396A CN114606798A CN 114606798 A CN114606798 A CN 114606798A CN 202011449396 A CN202011449396 A CN 202011449396A CN 114606798 A CN114606798 A CN 114606798A
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- paper
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- dye
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- 239000000126 substance Substances 0.000 claims abstract description 104
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- 238000005507 spraying Methods 0.000 claims abstract description 24
- 238000005096 rolling process Methods 0.000 claims abstract description 15
- 239000000975 dye Substances 0.000 claims description 84
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- 238000003756 stirring Methods 0.000 claims description 7
- 125000002091 cationic group Chemical group 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
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- MTNDZQHUAFNZQY-UHFFFAOYSA-N imidazoline Chemical compound C1CN=CN1 MTNDZQHUAFNZQY-UHFFFAOYSA-N 0.000 claims description 4
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- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 claims 1
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 claims 1
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- CADWTSSKOVRVJC-UHFFFAOYSA-N benzyl(dimethyl)azanium;chloride Chemical compound [Cl-].C[NH+](C)CC1=CC=CC=C1 CADWTSSKOVRVJC-UHFFFAOYSA-N 0.000 description 2
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- DNIAPMSPPWPWGF-VKHMYHEASA-N (+)-propylene glycol Chemical compound C[C@H](O)CO DNIAPMSPPWPWGF-VKHMYHEASA-N 0.000 description 1
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- 229920001223 polyethylene glycol Polymers 0.000 description 1
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Images
Classifications
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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
-
- 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
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
-
- 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
- D21H19/80—Paper comprising more than one coating
- D21H19/84—Paper comprising more than one coating on both sides of the substrate
-
- 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
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the 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
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/28—Colorants ; Pigments or opacifying agents
-
- 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
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/36—Biocidal agents, e.g. fungicidal, bactericidal, insecticidal agents
-
- 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
- D21H23/50—Spraying or projecting
-
- 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
- D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
- D21H23/56—Rolls
-
- 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
- D21H27/002—Tissue paper; Absorbent paper
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Paper (AREA)
- Sanitary Thin Papers (AREA)
Abstract
The invention discloses colored paper and a preparation method thereof, wherein the preparation method of the colored paper comprises the following steps: obtaining a composite solvent and a paper base layer, wherein the composite solvent comprises a color dye and a customized chemical; and adding the composite solvent to the surface of the paper base layer in a spraying or rolling way so as to dye the paper base layer. By the mode, the dye and other components can be compounded to form the composite solvent, and the composite solvent is added on paper in a post-processing mode, so that the pollution of the wet end of a paper machine and the huge pressure of water treatment are avoided, and the preparation method of the colored paper is realized.
Description
Technical Field
The invention relates to the technical field of paper preparation, in particular to colored paper and a preparation method thereof.
Background
With the rapid development of scientific technology, various products gradually appear phenomena of consumption upgrade and consumption classification, which makes consumers put higher demands on the functionality of paper, thereby creating a series of functional paper, such as antibacterial paper for daily use, cream paper for daily use, embossed paper for daily use, and the like. Most of the paper is pure white, and due to the personalized requirements of new-generation consumers, the white paper with uniform space cannot meet the personalized living requirements of the consumers. Therefore, primary color paper comes out and is preferred by consumers. The colorful paper towel has the advantages that the colorful elements are introduced into the field of household paper, and the colorful paper towel can be used for injecting fresh blood into paper, so that a new feeling is given to consumers.
The traditional production process of color paper is to add color dye into a white water system at the wet end of a paper machine, mix the color dye with pulp and then dye and make paper.
However, this process has the disadvantage that the dye is not 100% adsorbed on the fibers at the wet end, the utilization of the dye is difficult to guarantee, and it results in residual dye in the white water system, which makes the white water system colored, and it causes great water treatment difficulties.
Disclosure of Invention
The invention provides a colored paper and a preparation method thereof, which aim to solve the problem that the dyeing of the colored paper in the prior art causes water treatment difficulty.
In order to solve the technical problem, the invention provides a preparation method of colored paper, which comprises the following steps: obtaining a composite solvent and a paper base layer, wherein the composite solvent comprises a color dye and a customized chemical; and adding the composite solvent to the surface of the paper base layer in a spraying or rolling way so as to dye the paper base layer.
The method comprises the following steps of obtaining a composite solvent and a paper base layer: obtaining a customized chemical drug and a color dye; mixing the color dye and the customized chemical medicine, and uniformly stirring to obtain a composite solvent; wherein the mass fraction of the color dye in the composite solvent is 0.1-3%.
Wherein, the color dye is water-soluble dye, including direct dye and salt-based dye; the direct dye includes at least one of an anionic direct dye or a cationic direct dye.
Wherein the customized chemical comprises an antibacterial chemical, a cream chemical or an antibacterial glue chemical.
Wherein the antibacterial chemicals comprise at least one of quaternary ammonium salts, guanidines, phenols, aldehydes, alcohols and organic acids; the cream chemical comprises a humectant and a hand feeling agent, wherein the humectant comprises polyhydric alcohol, and the hand feeling agent comprises at least one of a long-chain alkane softening agent, an imidazoline softening agent and an organic silicon softening agent; the antibacterial glue chemicals comprise antibacterial chemicals and glue.
Wherein the step of obtaining the composite solvent and the paper base layer further comprises: preparing a paper raw material by adopting a dry-method wrinkling process, a wet-method wrinkling process or a hot-air through-drying forming process to obtain a paper base layer; wherein the weight of the paper substrate per square meter ranges from 10 grams to 70 grams.
The method comprises the following steps of adding a composite solvent to the surface of a paper base layer in a spraying or roll coating mode to dye the paper base layer, wherein the step of adding the composite solvent to the surface of the paper base layer in a spraying or roll coating mode comprises the following steps: uncoiling the paper base layer to enable the paper base layer to be flat; adding a composite solvent to the surfaces of the two opposite sides of the flat paper base layer by using a coating roller or a spraying device; and rolling the paper base layer with the composite solvent added on the surface.
Wherein, add the composite solvent to the surface of paper basic unit through the mode of spraying or roll coating to the step of dyeing paper basic unit still includes: uncoiling the at least two paper base layers to enable the at least two paper base layers to be flat; embossing at least two paper base layers to form protruding parts on the at least two paper base layers; adding a composite solvent to the surface of at least one side of the flat paper base layer by using a coating roller and the raised parts; pressing the at least two paper base layers added with the composite solvent; and rolling the pressed paper base layer.
Wherein, the mass ratio range between the composite solvent and the paper base layer is 2-40%.
In order to solve the technical problems, the invention also provides colored paper which is prepared by any one of the preparation methods of the colored paper.
The invention has the beneficial effects that: different from the prior art, the composite solvent comprising the color dye and the customized chemical is added to the surface of the paper base layer in a spraying or rolling way to dye and endow functions to the paper base layer, so that the problem of difficult water treatment caused by adding the color dye in a white water system at the wet end of a paper machine is solved. And the uniform dyeing of the paper base layer is realized, so that colored paper is obtained, and the individual requirements of consumers are met.
Drawings
FIG. 1 is a schematic flow chart of an embodiment of a method for preparing colored paper according to the present invention;
FIG. 2 is a schematic flow chart of another embodiment of the method for preparing colored paper according to the present invention;
fig. 3 is a schematic structural diagram of an example of the paper after being pressed in the present embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic flow chart of an embodiment of a method for manufacturing color paper of the present invention, and the method for manufacturing color paper of the present embodiment includes the following steps:
step S11: obtaining a composite solvent and a paper base layer, wherein the composite solvent comprises a color dye and a customized chemical drug.
Firstly, obtaining a composite solvent and a paper base layer, wherein the composite solvent is doped with a color dye. In a specific application scenario, the color dye may include any color such as wood pulp, yellow, pink, and the like, and is not limited herein.
In the step, the color dye, the water and the customized chemical are obtained according to a preset proportion, and the color dye, the water and the customized chemical are mixed uniformly according to the preset proportion to obtain the composite solvent. Wherein, each component in the composite solvent needs to have stronger compatibility and can not generate the phenomena of flocculation, precipitation and the like. The prepared composite solvent needs to be a uniform and stable solvent. The preset ratio can be set based on the requirements of practical application, and is not limited herein.
In a specific application scenario, the paper base layer may be a net-shaped thin-layer paper structure, and more specifically, the paper base layer may be a net-shaped thin-layer paper structure made of cellulose fibers. The cellulose fiber may include various papermaking fibers, specifically, the papermaking fibers may include various plant fibers, and the general plant fibers include wood pulp fibers, straw pulp fibers, cane pulp fibers, rayon fibers, and the like, which are not limited herein.
Step S12: and adding the composite solvent to the surface of the paper base layer in a spraying or rolling way so as to dye the paper base layer.
The composite solvent is uniformly added to the surface of the paper base layer in a spraying or roller coating mode so as to dye the paper base layer through color dye, and meanwhile, the paper base layer is endowed with functions through customized chemicals. When the paper base layer is dyed, the upper surface and the lower surface of the paper base layer are uniformly sprayed or roll-coated, so that the whole paper base layer is uniformly dyed and endowed with functions.
Through the steps, the preparation method of the color paper of the embodiment adds the composite solvent containing the color dye and the customized chemicals to the surface of the paper base layer in a spraying or rolling way to dye and endow functions to the paper base layer, thereby avoiding the problem of difficult water treatment caused by adding the color dye in a white water system of a paper machine wet end. And the uniform dyeing of the paper base layer is realized, so that colored paper is obtained, and the individual requirements of consumers are met.
Referring to fig. 2, fig. 2 is a schematic flow chart of another embodiment of the method for preparing color paper of the present invention, and the method for preparing color paper of the present embodiment includes the following steps:
step S21: and (3) obtaining the customized chemical drug and the color dye, mixing the color dye and the customized chemical drug, and uniformly stirring to obtain the composite solvent.
Obtaining a customized chemical drug and a color dye, wherein the customized chemical drug comprises an antibacterial chemical drug, a cream chemical drug, an antibacterial glue chemical drug or other chemical drugs. In a specific application scenario, when the antibacterial paper needs to be prepared, the customized chemical may be an antibacterial chemical. In a specific application scenario, when the cream-type paper needs to be prepared, the customized drug can be a cream chemical. In a specific application scenario, when a multilayer antibacterial paper needs to be prepared, the customized chemical can be an antibacterial glue chemical. The specific type of the customized chemical drug can be set based on actual production requirements, and is not limited herein. The embodiment adds the color dye to the customized chemical for realizing the paper function when preparing the functional paper, thereby enabling the color dye to dye the paper base layer along with the addition of the customized chemical without increasing additional process steps and affecting the functional effect of the customized chemical.
Wherein the antibacterial chemicals comprise at least one of quaternary ammonium salts, guanidines, phenols, aldehydes, alcohols and organic acids; the cream chemical comprises a humectant and a hand feeling agent, wherein the humectant comprises polyhydric alcohol, and the hand feeling agent comprises at least one of a long-chain alkane softening agent, an imidazoline softening agent and an organic silicon softening agent; the antibacterial glue chemicals comprise antibacterial chemicals and glue.
The colored dye of the present embodiment may be a water-soluble dye, including direct dyes and salt-based dyes. And the direct dye may employ at least one of an anionic direct dye or a cationic direct dye. Preferably, the direct dye is a cationic direct dye. The selection of the colored dye in the step is preferably food-grade dye which is friendly to human body and environment, and the specific type is not limited herein.
The method comprises the steps of obtaining the color dye, the water and the customized chemicals according to a preset proportion, and mixing the color dye, the water and the customized chemicals according to the preset proportion until the mixture is uniform to obtain the composite solvent. The compound solvent may be a color antibacterial chemical, a color cream chemical, a color antibacterial glue chemical or other chemical-compatible chemicals according to different customized chemicals, and is not limited herein.
Wherein, each component in the composite solvent needs to have stronger compatibility and can not generate the phenomena of flocculation, precipitation and the like. The prepared composite solvent needs to be a uniform and stable solvent. The preset proportion needs to ensure that the mass fraction range of the color dye in the composite solvent is 0.1-3% so as to ensure that when the addition amount of the color dye is in the range, the full dyeing of a paper base layer can be ensured, the excessive use of the color dye can be reduced, the phenomenon of ineffective dyeing or excessive dyeing is reduced, and the effect of customizing chemicals can be ensured to a certain extent.
Step S22: preparing the paper raw material by a dry-method wrinkling process, a wet-method wrinkling process or a hot-air through-drying forming process to obtain the paper base layer.
The paper raw material is obtained, wherein the paper raw material may be cellulose fibers, the cellulose fibers may include various papermaking fibers, and specifically, the papermaking fibers may include various plant fibers, and common plant fibers include wood pulp fibers, straw pulp fibers, cane pulp fibers, rayon fibers, and the like, which are not limited herein.
The paper base layer is obtained by preparing the paper raw material by adopting a dry method, wet method wrinkling or hot air through drying forming process. In a specific application scenario, the paper substrate may be a thin tissue paper which is manufactured by using cellulose fibers as raw materials and formed by a wet process.
The paper base layer of the step has the following weight requirements: the weight per square meter of each single paper substrate is in the range of 10-70 grams. The paper base layer of this embodiment may be a single-layer paper base layer, may be two or more layers of paper base layers, and is not limited herein. The structure of the paper substrate may be a mesh thin layer or other structures, which is not limited herein.
Step S23: uncoiling the paper base layer to flatten the paper base layer, adding the composite solvent to the surfaces of the two opposite sides of the flattened paper base layer by using a coating roller or a spraying device, and coiling the paper base layer with the composite solvent added on the surface.
After obtaining the paper basic unit, firstly uncoiling the paper basic unit to enable the paper basic unit to be flat. And then, uniformly rolling or spraying the composite solvent on the upper surface and the lower surface of the paper base layer by using a coating roller or a spraying device so as to dye the upper surface and the lower surface of the paper base layer. Wherein the coating roll is an anilox roll with concave and convex surfaces, and the number of Lines (LPI) of the anilox roll ranges from 50 to 300. And the key spray head part of the spraying device is an atomizing spray head combination. Through the structure, the composite solvent can be uniformly sprayed or rolled on the paper base layer.
And after the surfaces of the two opposite sides of the paper base layer are dyed, rolling the dyed paper base layer, curling the dyed paper base layer into a roll shape, folding and cutting the roll shape, and packaging the roll shape into a finished color paper product.
In this embodiment, the mass ratio between the composite solvent and the paper base layer ranges from 2% to 40%, and may be specifically set based on the matrix type of the composite solvent or the paper base layer, for example: the mass ratio between the composite solvent and the paper base layer may be 2%, 10%, 20%, 25%, 40%, or the like, and is not limited herein.
In a specific application scene, when the finished product of colored paper needs to be composed of at least two layers of paper base layers, the dyeing process can be carried out by adding a colored dye into a glue chemical, and when the at least two layers of paper base layers are adhered through the glue chemical, the at least two layers of paper base layers are dyed, and the specific process is as follows:
respectively uncoiling at least two paper base layers to enable the at least two paper base layers to be flat; embossing the at least two paper base layers to form raised portions on the at least two paper base layers.
The glue chemical coating roller added with the color dye is in contact with the protruding part of the paper base layer, so that the glue chemical added with the color dye is added to the surface of at least one side of the flat paper base layer, wherein the glue chemical is added to the surfaces of the two sides of the paper base layer positioned in the middle of the finished color paper product, and the glue chemical is not added to one side, away from other paper base layers, of the paper base layer positioned outside the finished color paper product. And laminating at least two paper base layers added with the glue chemical of the color dye to form paper with a multilayer structure, rolling the laminated paper base layers, folding, slitting and packaging to form a multilayer color paper finished product.
Through the above steps, in the preparation method of the color paper of the embodiment, the color dye is mixed with the customized chemicals to obtain the composite solvent for preparing a certain functional color paper, the paper raw material is prepared through dry-process wrinkling, wet-process wrinkling or hot-air through-drying forming process to obtain the paper base layer, and finally the composite solvent is added to the surfaces of the two opposite sides of the uncoiled paper base layer through the coating roller or the spraying device, so that the paper base layer can be dyed while the relevant functionality is given, and the color paper is obtained. The dyeing step of the embodiment can avoid additionally increasing the process steps in the paper making process, and simultaneously avoids the problem of difficult water treatment caused by adding color dye in a white water system at the wet end of a paper machine.
The above-mentioned aspects of the present invention will be specifically described below by way of a plurality of specific embodiments, in which the method for producing colored paper of the first embodiment is applied to the production of colored antibacterial household paper.
1. Blending of the color antibacterial chemicals:
the mass fraction ratio range of the colorful antibacterial chemical medicine is as follows: antibacterial agents: 8% -12%, color dye: 0.5-3%; the balance being water.
The antimicrobial agent may be an organic antimicrobial agent including at least one of quaternary ammonium salts, guanidines, phenols, aldehydes, alcohols, organic acids, such as: benzalkonium chloride, benzethonium chloride, other double-stranded quaternary ammonium salts, monoguanidines, biguanides, and the like.
The color dye is one of food-grade water-soluble direct dyes.
The blending method of the colorful antibacterial chemical comprises the following steps: the components are weighed according to the mass fraction ratio, mixed and stirred to be uniform, the color dye and the antibacterial agent need to be well compatible, and the phenomena of flocculation, precipitation and the like cannot occur. The prepared colorful antibacterial chemical medicine, namely the composite solvent needs to be uniform and stable emulsion for the next working procedure.
2. Adding a colorful antibacterial chemical:
the specific process of adding the color antibacterial chemical on the paper base layer comprises uncoiling, chemical adding and coiling.
The paper base layer is a reticular lamina structure, and more particularly can be a reticular lamina structure composed of cellulose fibers. The paper substrate may be paper made using dry creping, wet creping, or using a Through Air Drying (TAD) process, or a reticulated lamellar structure of cellulosic fibers. The paper base layer of the present embodiment is paper formed by a wet process, and preferably, the paper base layer is thin tissue paper which is manufactured by using cellulose fibers as a raw material and is formed by wet creping. The cellulose fibers of the present embodiment may include various papermaking fibers, for example, various plant fibers, and the plant fibers may include wood pulp fibers, straw pulp fibers, cane pulp fibers, rayon fibers, or the like.
The paper substrate may have a single layer basis weight of 10-70gsm, or may be a higher caliper, basis weight paper substrate made by laminating two or more layers of single paper.
The color antibacterial chemicals are added on the two outer surfaces of the paper base layer through a coating roller or a spraying device. The paper added with the color antibacterial chemicals is rolled into a roll shape through a rolling process, and is packaged into a finished product after being folded and cut.
The coating roll is an anilox roll with concave-convex surface, and the number of Lines (LPI) of the anilox roll ranges from 200 to 300 lines. The key spray head part of the spraying device is an atomization spray head combination, and the colored antibacterial chemical agent can be uniformly sprayed on the paper base layer, so that the colored antibacterial household paper is obtained.
The color depth and the antibacterial performance of the paper are controlled by adjusting the proportion of the dye and the antibacterial agent in the colorful antibacterial chemical agent and the addition amount of the dye and the antibacterial agent on the paper base layer. The higher the content of the dye in the color antibacterial chemical, the darker the paper color; the higher the content of the antibacterial agent in the colorful antibacterial chemical medicine, the better the antibacterial performance of the product.
In the present embodiment, the amount of the color antibacterial chemical added to the paper is 2% to 10%, that is, the mass ratio between the color antibacterial chemical and the paper base layer is 2% to 10%.
The paper added with the colorful antibacterial chemicals has colorful colors and antibacterial performance.
3. And (3) testing the antibacterial performance of the color antibacterial household paper:
the color antibacterial household paper of the present embodiment was tested for bacteriostatic performance using a household paper of the same basis weight without the addition of the antibacterial agent as a control sample.
Number of test samples: 2 packs of finished product were tested, and each pack of samples was tested in duplicate.
The test basis is as follows: GB15979 annex C4 (dissolution method).
Testing strains: staphylococcus aureus.
Acting time: for 20 minutes.
And (3) testing results: the color antibacterial household paper is bright in color, has a 20-minute antibacterial rate of more than 99% to staphylococcus aureus, has a strong antibacterial effect, and has the following specific reference data:
through the contrast experiment, the bacteriostatic rate of the colored antibacterial household paper can be ensured to a certain extent while the paper base layer is dyed by adding the colored dye into the antibacterial chemical.
The above-mentioned aspect of the present invention will be specifically described below by a second embodiment, in which the method for producing a colored paper sheet of the second embodiment is applied to the production of a colored cream household paper.
1. Blending of the color cream chemicals:
adding color dye into the cream chemical. The color cream chemical comprises the following components in percentage by weight:
dye: 0.1-3% of a humectant: 50-85%, hand feeling agent: 1 to 30 percent of water and the balance of water.
The humectant may include polyhydric alcohols including glycerin, 1, 3-propanediol, 1, 2-propanediol. 1, 3-butanediol (butylene glycol 1), sorbitol (sorbitol), polyethylene glycol, polyglycerol or polypropylene glycol. The hand feeling agent can be a softening agent, and comprises at least one of a long-chain alkane softening agent, an imidazoline softening agent and an organic silicon softening agent. The color dye is one of water-soluble cationic direct dyes.
The blending mode of the color cream chemical is as follows: accurately weighing each component, mixing the dye and water, uniformly stirring, then sequentially adding the humectant and the hand feeling agent, and completely stirring uniformly to form stable and uniform emulsion, wherein the next process can be carried out.
2. Adding the color cream chemicals:
the specific process of adding the color cream chemical on the paper base layer comprises uncoiling, chemical adding and coiling.
The paper base layer is a reticular lamina structure, and more particularly can be a reticular lamina structure composed of cellulose fibers. The paper substrate may be paper made using dry creping, wet creping, or using a Through Air Drying (TAD) process, or a reticulated lamellar structure of cellulosic fibers. The paper base layer of the present embodiment is paper formed by a wet process, and preferably, the paper base layer is thin tissue paper which is manufactured by using cellulose fibers as a raw material and is formed by wet creping. The cellulose fibers of the present embodiment may include various papermaking fibers, for example, various plant fibers, and the plant fibers may include wood pulp fibers, straw pulp fibers, cane pulp fibers, rayon fibers, or the like.
The paper substrate may have a single layer basis weight of 10-70gsm, or may be a higher caliper, basis weight paper substrate made by laminating two or more layers of single paper.
The color dye is added on the two outer surfaces of the paper base layer together with the color cream chemical through a coating roller or a spraying device. The paper with the color cream chemicals is rolled.
The coating roll is an anilox roll with concave-convex surface, and the number of Lines (LPI) of the anilox roll is 50-300 lines. The key spray head part of the spraying device is an atomizing spray head combination, so that the colored cream chemical can be uniformly sprayed on the paper base layer.
The color depth of the paper is controlled by adjusting the addition amount of the color dye in the color cream chemicals and the addition amount of the color cream chemicals on the paper. The higher the content of the dye in the coating liquid, the darker the paper color; the lower the content, the lighter the color.
In the present embodiment, the amount of the color cream chemical added to the paper is 5% to 40%. Namely, the mass ratio of the color cream chemical to the paper base layer is 5-40%.
The paper added with the color cream chemical has color and soft hand feeling of the cream paper.
And after the color cream daily paper added with the color cream chemicals is obtained, the color cream daily paper is uncoiled through an uncoiling rack, and the color cream daily paper is alternately folded, cut and packaged into a removable daily paper finished product. Wherein, the color cream daily use paper with two different colors can be folded, cut and packaged to produce the color extraction type daily use paper with two colors appearing alternately. The package can be in other forms, and is not limited herein.
3. Testing the physical properties and the hand feeling of the color cream household paper:
the physical properties and hand feeling of the color cream household paper were measured by comparing the same basis weight of the common white household paper, and the results are as follows.
| Example 1 | Control sample | |
| Number of layers | 3 | 3 |
| Basis weight-g/m 2 | 45.8 | 46.1 |
| Thickness-um | 265 | 288 |
| Colour(s) | Colour display | White colour |
| Water content% | 17.2 | 8.1 |
| Softness-mm | 35 | 80 |
Compared with a control sample with the same gram weight, the color cream household paper has beautiful color and higher water content, so that the product feels very wet and soft, and meanwhile, the softness is better, and the whole hand feeling is comfortable and skin-friendly.
The above-mentioned aspect of the present invention will be specifically explained by a third embodiment in which the method for producing a colored paper of the third embodiment is applied to the production of an antibacterial household paper having a colored pattern.
The production steps of the antibacterial household paper with the colorful patterns are as follows:
1. and (3) dissolving the colored antibacterial glue:
adding an antibacterial agent and a dye into the laminating adhesive, wherein the glue comprises the following components in percentage by mass:
laminating adhesive: 8% -20%, antibacterial agent: 8% -12%, dye: 0.5-1% and the balance of water.
The main component of the laminating adhesive may be methylcellulose.
The antimicrobial agent may be an organic antimicrobial agent including at least one of quaternary ammonium salts, guanidines, phenols, aldehydes, alcohols, organic acids, such as: benzalkonium chloride, benzethonium chloride, other double-stranded quaternary ammonium salts, monoguanidines, biguanides, and the like.
The dye is a cationic direct dye.
The blending method of the colorful antibacterial glue chemical comprises the following steps: weighing the components in proportion, mixing the laminating adhesive and water, stirring uniformly, then sequentially adding the weighed antibacterial agent and the colored dye, and stirring uniformly again. The blended colorful antibacterial glue chemical agent can be used for the next procedure only if the emulsion is uniform and stable.
2. Adding a colorful antibacterial glue chemical:
selecting 2 layers of paper base layers, uncoiling to obtain a first paper base layer and a second paper base layer, separating the first paper base layer from the second paper base layer, embossing the separated first paper base layer and the second paper base layer respectively, and enabling the embossed first paper base layer and the embossed second paper base layer to pass through an anilox roller respectively, wherein a colored antibacterial glue chemical is added to the anilox roller, pattern parts on the embossed paper protrude and are in contact with the anilox roller, and the colored antibacterial glue chemical is added to the protruding parts (patterned parts) on the inner layer of the embossed paper through the anilox roller to form a composite glue layer; and pressing the first paper base layer and the second paper base layer again, and finally adding the colored antibacterial glue chemical into the patterned part of the paper embossing between the first paper base layer and the second paper base layer along with the colored antibacterial glue chemical. And laminating, slitting and packaging the pressed paper to obtain a finished paper product.
Referring to fig. 3, fig. 3 is a schematic structural diagram of an embodiment of a pressed paper sheet according to the present embodiment.
The post-press-fit paper 10 of the present embodiment includes: first paper basic unit 11, second paper basic unit 13 and colored antibiotic glue layer 12, colored antibiotic glue layer 12 sets up between first paper basic unit 11, second paper basic unit 13 to glue first paper basic unit 11, second paper basic unit 13, make the paper 10 structure after the pressfitting be bilayer structure.
3. And (3) testing the bacteriostatic performance of the antibacterial domestic paper with the colorful patterns:
the antibacterial performance of the antibacterial household paper with the color pattern is tested by taking household paper with the same basis weight without the antibacterial agent as a control sample.
Number of test samples: 3 packs of finished product were tested, and each pack of samples was tested in duplicate.
The test basis is as follows: GB15979 appendix C4 (dissolution method).
Testing strains: escherichia coli.
Acting time: for 20 minutes.
And (3) testing results: the antibacterial domestic paper with colorful patterns has a 20-minute bacteriostasis rate of more than 90 percent on escherichia coli, and has strong bacteriostasis.
Through the contrast experiment, the bacteriostatic rate of the colored antibacterial household paper can be ensured to a certain extent while the paper base layer is dyed by adding the colored dye into the antibacterial chemical.
Based on the same inventive concept, the present invention also provides a colored paper which can be prepared by the preparation method of the colored paper described in all the above embodiments. The method comprises the following steps of obtaining a composite solvent and a paper base layer, wherein the composite solvent is doped with a color dye; and then adding the composite solvent to the surface of the paper base layer in a spraying or rolling way so as to dye the paper base layer.
The colorful paper provided by the invention has colorful and beautiful colors, and compared with the traditional white paper, the experience of a user can be improved. According to the color paper provided by the invention, the color dye and other functional components are compounded and added on the paper base layer in a post-processing mode, so that the pollution of the wet end of the paper machine and the huge pressure of water treatment can not be caused. Meanwhile, the color paper provided by the invention has special functionality, such as antibacterial property, softness, embossing property and the like, the using function of the product is expanded, and the additional value is improved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A method for preparing colored paper is characterized by comprising the following steps:
obtaining a composite solvent and a paper base layer, wherein the composite solvent comprises a color dye and a customized chemical;
and adding the composite solvent to the surface of the paper base layer in a spraying or rolling way so as to dye the paper base layer.
2. The method for producing colored paper according to claim 1, wherein the step of obtaining the composite solvent and the paper base layer comprises:
obtaining the customized chemical drug and the color dye;
mixing the color dye and the customized chemical medicine, and uniformly stirring to obtain the composite solvent;
wherein the mass fraction range of the color dye in the composite solvent is 0.1-3%.
3. The method of manufacturing a colored sheet according to claim 2, wherein the colored dye is a water-soluble dye including a direct dye and a salt-based dye;
the direct dye includes at least one of an anionic direct dye and a cationic direct dye.
4. The method of claim 2, wherein the customized chemicals include antibacterial chemicals, cream chemicals, or antibacterial glue chemicals.
5. The method of producing colored paper according to claim 4,
the antibacterial chemical comprises at least one of quaternary ammonium salt, guanidine, phenol, aldehyde, alcohol and organic acid;
the cream chemical comprises a humectant and a hand feeling agent, wherein the humectant comprises polyhydric alcohol, and the hand feeling agent comprises at least one of a long-chain alkane softening agent, an imidazoline softening agent and an organic silicon softening agent;
the antibacterial chemical glue comprises the antibacterial chemical glue and glue.
6. The method for producing colored paper according to claim 1, wherein the step of obtaining the composite solvent and the paper base layer further comprises:
preparing a paper raw material by adopting a dry-method wrinkling, wet-method wrinkling or hot-air through-drying forming process to obtain the paper base layer;
wherein the weight of the paper substrate per square meter ranges from 10 to 70 grams.
7. The method for preparing colored paper according to claim 1, wherein the step of adding the composite solvent to the surface of the paper base layer by spraying or roller coating to dye the paper base layer comprises the following steps:
uncoiling the paper base layer to enable the paper base layer to be flat;
adding the composite solvent to the surfaces of the two opposite sides of the flat paper base layer by using a coating roller or a spraying device;
and rolling the paper base layer with the composite solvent added on the surface.
8. The method for preparing colored paper according to claim 1, wherein the step of adding the composite solvent to the surface of the paper base layer by spraying or roll coating to dye the paper base layer further comprises:
uncoiling at least two layers of the paper base layers to enable the at least two layers of the paper base layers to be flat;
embossing the at least two paper base layers to form protruding parts on the at least two paper base layers;
adding the composite solvent to the surface of at least one side of the flat paper base layer by using a coating roller and the raised parts;
pressing the at least two paper base layers added with the composite solvent;
and rolling the pressed paper base layer.
9. The method for preparing colored paper as claimed in claim 1, wherein the mass ratio of the composite solvent to the paper base layer is in the range of 2-40%.
10. A colored paper, characterized in that it is produced by the process for the production of colored paper according to claims 1-9.
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| CN101718057A (en) * | 2009-12-28 | 2010-06-02 | 全利机械股份有限公司 | Antibacterial paper and manufacturing method thereof |
| CN103061204A (en) * | 2012-10-26 | 2013-04-24 | 福建恒安集团有限公司 | Soft paper subjected to surface preparation |
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Application publication date: 20220610 |