CN111622007A - Preparation method of high-transfer inkjet thermal transfer base paper - Google Patents
Preparation method of high-transfer inkjet thermal transfer base paper Download PDFInfo
- Publication number
- CN111622007A CN111622007A CN202010456836.8A CN202010456836A CN111622007A CN 111622007 A CN111622007 A CN 111622007A CN 202010456836 A CN202010456836 A CN 202010456836A CN 111622007 A CN111622007 A CN 111622007A
- Authority
- CN
- China
- Prior art keywords
- paper
- base paper
- thermal transfer
- sizing
- preparation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/02—Methods of beating; Beaters of the Hollander type
-
- 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
- D21H23/32—Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper
- D21H23/34—Knife or blade type coaters
-
- 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
- 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
Landscapes
- Ink Jet Recording Methods And Recording Media Thereof (AREA)
- Paper (AREA)
Abstract
The invention relates to the technical field of papermaking, and provides a preparation method of high-transfer inkjet thermal transfer base paper aiming at the problem of light color of transfer patterns of the thermal transfer base paper. The method comprises the following steps: (1) preparing slurry; (2) pre-treatment of sizing; (3) sizing; (4) and (5) sizing and post-treatment. The ink transfer film is prepared by internal sizing to solve the problem of high ink absorption capacity, the surface strength, ink absorptivity and transfer performance of the surface of the base paper are obviously improved, the problem of hair and powder falling in the coating process is also solved, the coating process is smoother, and finally a good ink carrier is obtained on the surface of the base paper. The ink needs higher temperature to be printed on a target object in the transfer printing process, so that the thermal transfer paper is required to have stronger thermal stability, when the temperature is increased, the thermal transfer paper cannot shrink or deform due to heating, and the internal components of the thermal transfer paper cannot be decomposed by heating. The thermal transfer base paper prepared by the sizing agent adopted by the invention has higher thermal stability.
Description
Technical Field
The invention relates to the technical field of papermaking, in particular to a preparation method of high-transfer inkjet thermal transfer base paper.
Background
Since the heat transfer printing technology enters China, the heat transfer printing technology is popular with consumers. With the continuous development of real estate, printing and dyeing industry and clothing industry in China and the popularization of computer technology, the digital printing technology rises rapidly, wherein the inkjet thermal transfer base paper is a representative special paper with thermal transfer performance. With the rapid development of the digital inkjet thermal transfer printing technology and the approval and dependence of people on thermal transfer printing products, the market demand of inkjet thermal transfer printing base paper is greatly increased in a short period. However, due to low quantification in the market, transfer printing requirements of some special designs and colors and dark colors of customers cannot be met, and the ink color after transfer printing is light and the color is light and cannot be accepted by customers, so that the preparation of the high-transfer inkjet thermal transfer paper has important significance.
The present invention provides a base paper for thermal transfer paper excellent in tensile strength, tensile strength after heat treatment, printability and workability, and thermal transfer paper using the same, as well as patent No. CN201810349456.7 entitled "base paper for thermal transfer paper and thermal transfer paper". The base paper for thermal transfer paper is characterized by comprising cellulose pulp as a main component; the density is 0.75-0.85 g/cm; the basis weight is 20-50 g/m; the single surface is a smooth surface, and the Wang grinding type smoothness of the smooth surface is more than 500 seconds; and the content of sulfate ion is 0.6mg/l or less.
The method has the disadvantages that the surface of the base paper needs to be additionally coated with an ink layer, the preparation cost is high, and the types of the transferred ink are limited, such as the thermal stability of a coating film is limited.
Disclosure of Invention
The invention provides a preparation method of high-transfer printing jet printing base paper for overcoming the problem of light color of a transfer pattern of the base paper for thermal transfer printing, the base paper for thermal transfer printing paper has higher transfer printing efficiency, can transfer the pattern with clear pattern and bright color, and has better thermal stability and mechanical property, is not easy to deform and shrink when heated, and has stronger tear resistance.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of high-transfer inkjet thermal transfer base paper comprises the following preparation steps:
(1) preparing slurry: mixing and pulping the raw material slurry and the auxiliary agent to prepare mixed slurry;
(2) sizing pretreatment: soaking the mixed pulp in a white dextrin solution, dehydrating the net part, squeezing and drying to obtain raw paper;
(3) sizing: performing surface sizing treatment, namely performing surface sizing on the raw material paper in the step (2) by adopting a modified octadecyl methacrylate-erucamide propyl hydroxysulfobetaine-styrene polymer to obtain a paper sheet subjected to surface sizing treatment;
(4) sizing post-treatment: and carrying out post-sectional drying, press polishing and finishing on the paper sheet subjected to surface sizing treatment, and rolling to obtain a finished product.
The invention aims to prepare transfer paper with high transfer efficiency and high thermal stability, firstly, the absorption capacity of the thermal transfer paper to ink needs to be reduced, the problem of high ink absorption capacity is solved by adopting an ink transfer film prepared by internal sizing, meanwhile, the surface strength, the ink absorption and the transfer performance of the surface of base paper are obviously improved, the problem of hair and powder falling in the coating process is also solved, the coating process is smoother, and finally, a good ink carrier is obtained on the surface of the base paper. The ink needs higher temperature to be printed on a target object in the transfer printing process, so that the thermal transfer paper is required to have stronger thermal stability, when the temperature is increased, the thermal transfer paper cannot shrink or deform due to heating, and the internal components of the thermal transfer paper cannot be decomposed by heating. The thermal transfer base paper prepared by the sizing agent adopted by the invention has higher thermal stability and low absorptivity.
Preferably, the raw pulp in step (1) comprises 20-40% bleached softwood pulp and 60-80% bleached broad-leaf pulp, the pulp size is 35-45 DEG SR, and the wet weight is 1.5-2.5 g.
Preferably, the auxiliary agents and the using amounts thereof are respectively as follows: the dosage of the degasifier is 0.5-1.0kg per ton of paper; the dosage of the cationic starch and the ton of paper is 10-15 kg; the dosage of the defoaming agent is 0.3-0.6kg per ton of paper.
Preferably, the volume ratio of the white dextrin solution to the mixed slurry in the step (2) is 1: 1-1.4.
The white dextrin is a preferred thickening agent and has a wide viscosity range, wherein after the white dextrin is mixed with the pulp, the viscosity of the pulp can be increased, and the white dextrin can be effectively attached to the surface of fibers after penetrating into wood fibers in the pulp, so that the adhesive force and the active group attachment points between the fibers are increased, and a strong adhesion foundation is provided for further crosslinking combination of a wood fiber matrix and a subsequent sizing coating layer.
Preferably, in the step (4), the preparation step of the modified octadecyl methacrylate-erucamidopropylhydroxysultaine-styrene polymer comprises:
A. preparing a seed emulsion: adding distilled water, octadecyl methacrylate and erucamidopropyl hydroxysulfobetaine into a container under magnetic stirring, adding tetrabutyl titanate serving as a catalyst and dodecyl ammonium chloride serving as an emulsifier after complete dissolution, controlling the temperature to be 70-80 ℃, and reacting for 0.5-1h to obtain octadecyl methacrylate-erucamidopropyl hydroxysulfobetaine seed liquid;
B. preparation of the polymer: adding styrene into the seed liquid, slowly heating to 96-100 ℃, reacting for 2-2.5h to obtain semitransparent viscous liquid, and adjusting the pH value to 6.8-7 when the temperature of the liquid is reduced to room temperature;
C. hydrophilic modified polymer: adding 2, 2-dimethylolpropionic acid into the polymerized polymer solution, heating to 60-70 ℃, and stirring for 1-1.5h to obtain the modified octadecyl methacrylate-erucamide propyl hydroxysultaine-styrene polymer.
The macromolecular polymer prepared by the step has stronger ink adhesion capability and good ink adhesion capability.
The stearyl methacrylate is introduced here because the ester group has a certain oleophilic ability, which is beneficial for the ink to adhere to the transfer paper and maintain the same appearance of the printed pattern, but the ink can not flow everywhere due to the poor adhesion ability of the ink on the transfer paper, but if the carbon chain on the main chain of the monomer is too long and the number of carbon atoms exceeds 16, the effective network volume in the molecular chain is reduced, and the adsorbed oil quantity cannot be stored in the interior, thereby reducing the ink adsorption ability. Therefore, the stearyl methacrylate is selected, so that the adhesion of the ink can be ensured, excessive ink absorption of the transfer base paper can be avoided, and the ink is ensured to have higher transfer efficiency. The erucamidopropyl hydroxysulfobetaine is introduced, the molecular structure of the erucamidopropyl hydroxysulfobetaine contains an amido group, unshared electrons on amino nitrogen in the amido group form a conjugated system with a stronger resistance effect with pi electrons of a carbonyl group, the conjugated system has a positive promotion effect on the improvement of the thermal stability of a macromolecular chain, and the carbon chains on the branched chains are longer, so that the network volume of the macromolecular chain can be further reduced, and the ink absorption rate is further reduced. Then introducing styrene, and introducing a rigid group benzene ring after introducing a large conjugated structure into the final macromolecular polymer structure, so that the macromolecule has the double functions of promoting the thermal stability of the polymer and filling the macromolecular network structure, and the macromolecular chain of the polymer has stronger thermal stability and film-forming continuity.
The printing ink contains a large amount of printing ink dissolving solvent besides printing ink components, if transfer printing base paper on the solvent only contains oleophilic groups, the oleophilic groups have poor polarity, so that the affinity to the solvent is poor, the separation of printing ink solute and polar solvent in the printing ink is bound to be caused, and the permeation and the attachment of the printing ink on a printed object after transfer printing are not facilitated.
The preparation method adopts seed polymerization, namely, adopts emulsion polymerization to synthesize the octadecyl methacrylate-erucamide propyl hydroxysulfobetaine-styrene polymer, so that the regularity of a macromolecular chain is better, the average molecular weight of the prepared polymer is smaller in difference, and the polymer is basically a homopolymer. The film forming mechanism is that the total polymer of the seed emulsion is dispersed in water phase in a particle state, each particle is composed of a plurality of polymer molecules, and the particles are compatible with each other to form the film by the polymer, so the emulsion film forming process is closely related to the hardness and softness of the particles, and the softer the particles, the easier the film forming is. The emulsion particles prepared by the seed method have the outer layer of soft octadecyl methacrylate-erucamidopropyl hydroxysultaine, so the film forming property is good, the octadecyl methacrylate-erucamidopropyl hydroxysultaine-styrene prepared by the one-step blending method and the step-by-step blending method is easy to polymerize into a random copolymer, and the styrene unit on the main chain of the random copolymer can increase the tensile strength of an adhesive film, reduce the elongation at break, increase the brittleness temperature and increase the hardness. The emulsion particle prepared by the seed method has the advantages that the octadecyl methacrylate-erucamide propyl hydroxysulfobetaine on the outer layer is in a continuous phase, the molecular branch chain is longer, and the bonding capability is extremely strong, so that the tensile strength, the brittleness temperature and the hardness are low, and the elongation at break is increased.
Preferably, the ratio of distilled water, stearyl methacrylate, erucamidopropylhydroxysultaine, tetrabutyltitanate and dodecylammonium chloride in step a: 200-250 ml: 1-1.2 mol: 1-1.4 mol: 20 g: 80-100 ml.
Preferably, the molar ratio of styrene to octadecyl methacrylate-erucamidopropyl hydroxysultaine seed liquor in step B is from 3.5 to 4: 1; in the step C, the molar ratio of the 2, 2-dimethylolpropionic acid to the polymer is 1-1.2: 1-1.4.
Preferably, the sizing method in the step (3) is performed by alternately performing a blade coating method and an air knife coating method, and the coating speed is 1-1.5 m/min.
When the adhesive layer is coated, a composite technology of two modes of scraper coating and air knife coating is adopted, so that the loss of the coating and the problem of hair and powder falling can be effectively improved, more importantly, the leveling property and film forming property of the coating are greatly improved in the coating process, and a foundation is laid for finally obtaining good ink transfer; the coated paper has smooth and fine surface, reduces the migration of the printing ink to the inside of the coating, and simultaneously, the printed pattern is clear and bright, so that a good transfer effect is obtained. The even coating speed can further ensure the coating quality of the glue layer by the combination of the composite technology and the even coating speed, and as the macromolecular polymerization of the glue solution contains the polymeric monomer with longer carbon chain structure and the benzene ring structure, if the coating speed is too fast, the macromolecular chains have no time to be orderly distributed, thus easily causing more defects in the macromolecular framework in the glue layer, if the coating speed is too slow, the macromolecular crosslinking drying of the area without knife scraping can be caused, the leveling effect after knife scraping is poor, the glue layer is unevenly coated, the final tearing resistance and the weather resistance of the glue coating layer are reduced, and the transfer printing efficiency of the printing ink is mainly reduced.
Preferably, the stage drying conditions in step (4) are: slowly heating to 60-70 deg.C, drying for 1.2-1.5h, heating to 110-120 deg.C, and drying for 40-50 min.
Preferably, the calendering finishing conditions in the step (4) are as follows: the heating temperature is 90-100 ℃, and the pressure is 100-.
Therefore, the invention has the following beneficial effects:
(1) the preparation method of the high-transfer printing thermal transfer base paper is provided, and the printing thermal transfer base paper with good high-transfer performance is developed by optimizing a base paper process and a coating process of the printing thermal transfer base paper, so that the deep-color transfer effect of customers can be met, the density is high, the water resistance is good, and the low thermal shrinkage rate is low;
(2) the macromolecule with good film-forming property is prepared by emulsification polymerization, the loss of the coating and the solved hair and powder falling are reduced, the key is that the leveling property and the film-forming property in the coating process of the coating are greatly improved, and a foundation is laid for obtaining good ink transfer;
(3) the surface coating provides better attachment sites for the ink by modifying the polymer of the glue layer, and has lower absorptivity for the ink, so that the obtained macromolecular polymer film has excellent amphipathy.
Detailed Description
The invention is further described with reference to specific embodiments.
In the present invention, the raw materials and equipment used are commercially available or commonly used in the art, unless otherwise specified. The methods in the following examples are conventional in the art unless otherwise specified.
General examples
A preparation method of high-transfer inkjet thermal transfer base paper comprises the following preparation steps:
(1) preparing slurry: mixing and pulping the raw material slurry and the auxiliary agent to prepare mixed slurry; the raw material pulp comprises 20-40% of bleached softwood pulp and 60-80% of bleached broad-leaved pulp, the pulp degree is 35-45 DEG SR, and the wet weight is 1.5-2.5 g; the auxiliary agents and the dosage thereof are respectively as follows: the dosage of the degasifier is 0.5-1.0kg per ton of paper; the dosage of the cationic starch and the ton of paper is 10-15 kg; defoaming agent, the dosage of each ton of paper is 0.3-0.6 kg;
(2) sizing pretreatment: soaking the mixed pulp in a white dextrin solution, dehydrating the net part, squeezing and drying to obtain raw paper; the volume ratio of the white dextrin solution to the mixed slurry is 1: 1-1.4;
(3) sizing: performing surface sizing treatment, namely performing surface sizing on the raw material paper in the step (2) by adopting a modified octadecyl methacrylate-erucamide propyl hydroxysulfobetaine-styrene polymer to obtain a paper sheet subjected to surface sizing treatment; the sizing method adopts a blade coating method and an air knife coating method which are alternately carried out, and the coating speed is 1-1.5 m/min. The preparation method of the modified octadecyl methacrylate-erucamidopropyl hydroxysultaine-styrene polymer comprises the following steps: A. preparing a seed emulsion: adding distilled water, octadecyl methacrylate and erucamidopropyl hydroxysulfobetaine into a container under magnetic stirring, adding catalyst tetrabutyl titanate and reagent dodecylammonium chloride after completely dissolving, controlling the temperature at 70-80 ℃, and reacting for 0.5-1h to obtain octadecyl methacrylate-erucamidopropyl hydroxysulfobetaine seed liquid. The ratio of the distilled water to the octadecyl methacrylate to the erucamidopropylhydroxysultaine to the tetrabutyl titanate to the dodecylammonium chloride is as follows: 200-250 ml: 1-1.2 mol: 1-1.4 mol: 20 g: 80-100 ml.
B. Preparation of the polymer: adding styrene into the seed liquid, slowly heating to 96-100 ℃, reacting for 2-2.5h to obtain semitransparent viscous liquid, and adjusting the pH value to 6.8-7 when the temperature of the liquid is reduced to room temperature; the mol ratio of the styrene to the octadecyl methacrylate-erucamidopropyl hydroxysulfobetaine seed liquid is 3.5-4: 1;
C. hydrophilic modified polymer: adding 2, 2-dimethylolpropionic acid into the polymerized polymer solution, heating to 60-70 ℃, and stirring for 1-1.5h to obtain the modified octadecyl methacrylate-erucamide propyl hydroxysultaine-styrene polymer. In the step C, the molar ratio of the 2, 2-dimethylolpropionic acid to the polymer is 1-1.2: 1-1.4.
(4) Sizing post-treatment: and carrying out post-sectional drying, press polishing and finishing on the paper sheet subjected to surface sizing treatment, and rolling to obtain a finished product. The sectional drying conditions are as follows: slowly heating to 60-70 deg.C, drying for 1.2-1.5h, heating to 110-120 deg.C, and drying for 40-50 min. The calendering finishing conditions are as follows: the heating temperature is 90-100 ℃, and the pressure is 100-.
Example 1
A preparation method of high-transfer inkjet thermal transfer base paper comprises the following preparation steps:
(1) preparing slurry: mixing and pulping the raw material slurry and the auxiliary agent to prepare mixed slurry; the raw material pulp comprises 30% bleached softwood pulp and 70% bleached broadleaf pulp, the pulp degree is 40 DEG SR, and the wet weight is 2 g; the auxiliary agents and the dosage thereof are respectively as follows: the dosage of the degasifier is 0.8kg per ton of paper; the dosage of the cationic starch and the ton of paper is 12 kg; defoaming agent, the dosage of each ton of paper is 0.5 kg;
(2) sizing pretreatment: soaking the mixed pulp in a white dextrin solution, dehydrating the net part, squeezing and drying to obtain raw paper; the volume ratio of the white dextrin solution to the mixed slurry is 1: 1.2;
(3) sizing: performing surface sizing treatment, namely performing surface sizing on the raw material paper in the step (2) by adopting a modified octadecyl methacrylate-erucamide propyl hydroxysulfobetaine-styrene polymer to obtain a paper sheet subjected to surface sizing treatment; the sizing method adopts a blade coating method and an air knife coating method which are alternately carried out, and the coating speed is 1.3 m/min. The preparation method of the modified octadecyl methacrylate-erucamidopropyl hydroxysultaine-styrene polymer comprises the following steps: A. preparing a seed emulsion: adding distilled water, octadecyl methacrylate and erucamidopropyl hydroxysulfobetaine into a container under magnetic stirring, adding catalyst tetrabutyl titanate and reagent dodecylammonium chloride after completely dissolving, controlling the temperature at 75 ℃, and reacting for 0.8h to obtain octadecyl methacrylate-erucamidopropyl hydroxysulfobetaine seed liquid. The ratio of the distilled water to the octadecyl methacrylate to the erucamidopropylhydroxysultaine to the tetrabutyl titanate to the dodecylammonium chloride is as follows: 220 ml: 1.1 mol: 1.2 mol: 20 g: 90 ml.
B. Preparation of the polymer: adding styrene into the seed liquid, slowly heating to 98 ℃, reacting for 2.2 hours to obtain semitransparent viscous liquid, and adjusting the pH value to 6.9 when the temperature of the liquid is reduced to room temperature; the molar ratio of the styrene to the octadecyl methacrylate-erucamidopropylhydroxysultaine seed liquid is 3.8: 1;
C. hydrophilic modified polymer: adding 2, 2-dimethylolpropionic acid into the polymerized polymer solution, heating to 65 ℃, and stirring for 1.2 hours to obtain the modified octadecyl methacrylate-erucamide propyl hydroxysultaine-styrene polymer. The molar ratio of 2, 2-dimethylolpropionic acid to polymer in step C was 1.1: 1.2.
(4) sizing post-treatment: and carrying out post-sectional drying, press polishing and finishing on the paper sheet subjected to surface sizing treatment, and rolling to obtain a finished product. The sectional drying conditions are as follows: slowly heating to 65 deg.C, drying for 1.3h, and heating to 115 deg.C, and drying for 45 min. The calendering finishing conditions are as follows: the heating temperature is 95 ℃ and the pressure is 120 kN/m.
Example 2
The difference from the embodiment 1 is that the preparation method of the high-transfer inkjet thermal transfer base paper comprises the following preparation steps:
(1) preparing slurry: mixing and pulping the raw material slurry and the auxiliary agent to prepare mixed slurry; the raw material pulp comprises 25% of bleached softwood pulp and 75% of bleached broad-leaf pulp, the pulp degree is 38 DEG SR, and the wet weight is 2 g; the auxiliary agents and the dosage thereof are respectively as follows: the dosage of the degasifier is 0.8kg per ton of paper; the dosage of the cationic starch and the ton of paper is 12 kg; defoaming agent, the dosage of each ton of paper is 0.5 kg;
(2) sizing pretreatment: soaking the mixed pulp in a white dextrin solution, dehydrating the net part, squeezing and drying to obtain raw paper; the volume ratio of the white dextrin solution to the mixed slurry is 1: 1.1;
(3) sizing: performing surface sizing treatment, namely performing surface sizing on the raw material paper in the step (2) by adopting a modified octadecyl methacrylate-erucamide propyl hydroxysulfobetaine-styrene polymer to obtain a paper sheet subjected to surface sizing treatment; the sizing method adopts a blade coating method and an air knife coating method which are alternately carried out, and the coating speed is 1.1 m/min. The preparation method of the modified octadecyl methacrylate-erucamidopropyl hydroxysultaine-styrene polymer comprises the following steps: A. preparing a seed emulsion: adding distilled water, octadecyl methacrylate and erucamidopropyl hydroxysulfobetaine into a container under magnetic stirring, adding catalyst tetrabutyl titanate and reagent dodecylammonium chloride after completely dissolving, controlling the temperature at 75 ℃, and reacting for 0.8h to obtain octadecyl methacrylate-erucamidopropyl hydroxysulfobetaine seed liquid. The ratio of the distilled water to the octadecyl methacrylate to the erucamidopropylhydroxysultaine to the tetrabutyl titanate to the dodecylammonium chloride is as follows: 210 ml: 1.05 mol: 1.1 mol: 20 g: 85 ml.
B. Preparation of the polymer: adding styrene into the seed liquid, slowly heating to 98 ℃, reacting for 2.2 hours to obtain semitransparent viscous liquid, and adjusting the pH value to 6.9 when the temperature of the liquid is reduced to room temperature; the molar ratio of the styrene to the octadecyl methacrylate-erucamidopropylhydroxysultaine seed liquid is 3.6: 1;
C. hydrophilic modified polymer: adding 2, 2-dimethylolpropionic acid into the polymerized polymer solution, heating to 65 ℃, and stirring for 1.2 hours to obtain the modified octadecyl methacrylate-erucamide propyl hydroxysultaine-styrene polymer. The molar ratio of 2, 2-dimethylolpropionic acid to polymer in step C was 1.05: 1.3.
(4) sizing post-treatment: and carrying out post-sectional drying, press polishing and finishing on the paper sheet subjected to surface sizing treatment, and rolling to obtain a finished product. The sectional drying conditions are as follows: slowly heating to 65 deg.C, drying for 1.3h, and heating to 115 deg.C, and drying for 45 min. The calendering finishing conditions are as follows: the heating temperature is 95 ℃ and the pressure is 120 kN/m.
Example 3
The difference from the embodiment 1 is that the preparation method of the high-transfer inkjet thermal transfer base paper comprises the following preparation steps:
(1) preparing slurry: mixing and pulping the raw material slurry and the auxiliary agent to prepare mixed slurry; the raw material pulp comprises 35% of bleached softwood pulp and 65% of bleached broad-leaf pulp, the pulp degree is 42 DEG SR, and the wet weight is 2 g; the auxiliary agents and the dosage thereof are respectively as follows: the dosage of the degasifier is 0.8kg per ton of paper; the dosage of the cationic starch and the ton of paper is 12 kg; defoaming agent, the dosage of each ton of paper is 0.5 kg;
(2) sizing pretreatment: soaking the mixed pulp in a white dextrin solution, dehydrating the net part, squeezing and drying to obtain raw paper; the volume ratio of the white dextrin solution to the mixed slurry is 1: 1.1;
(3) sizing: performing surface sizing treatment, namely performing surface sizing on the raw material paper in the step (2) by adopting a modified octadecyl methacrylate-erucamide propyl hydroxysulfobetaine-styrene polymer to obtain a paper sheet subjected to surface sizing treatment; the sizing method adopts a blade coating method and an air knife coating method which are alternately carried out, and the coating speed is 1.4 m/min. The preparation method of the modified octadecyl methacrylate-erucamidopropyl hydroxysultaine-styrene polymer comprises the following steps: A. preparing a seed emulsion: adding distilled water, octadecyl methacrylate and erucamidopropyl hydroxysulfobetaine into a container under magnetic stirring, adding catalyst tetrabutyl titanate and reagent dodecylammonium chloride after completely dissolving, controlling the temperature at 75 ℃, and reacting for 0.8h to obtain octadecyl methacrylate-erucamidopropyl hydroxysulfobetaine seed liquid. The ratio of the distilled water to the octadecyl methacrylate to the erucamidopropylhydroxysultaine to the tetrabutyl titanate to the dodecylammonium chloride is as follows: 240 ml: 1.1 mol: 1.3 mol: 20 g: 95 ml.
B. Preparation of the polymer: adding styrene into the seed liquid, slowly heating to 98 ℃, reacting for 2.2 hours to obtain semitransparent viscous liquid, and adjusting the pH value to 6.9 when the temperature of the liquid is reduced to room temperature; the molar ratio of the styrene to the octadecyl methacrylate-erucamidopropylhydroxysultaine seed liquid is 3.9: 1;
C. hydrophilic modified polymer: adding 2, 2-dimethylolpropionic acid into the polymerized polymer solution, heating to 65 ℃, and stirring for 1.4 hours to obtain the modified octadecyl methacrylate-erucamide propyl hydroxysultaine-styrene polymer. The molar ratio of 2, 2-dimethylolpropionic acid to polymer in step C was 1.2: 1.
(4) sizing post-treatment: and carrying out post-sectional drying, press polishing and finishing on the paper sheet subjected to surface sizing treatment, and rolling to obtain a finished product. The sectional drying conditions are as follows: slowly heating to 65 deg.C, drying for 1.3h, and heating to 115 deg.C, and drying for 45 min. The calendering finishing conditions are as follows: the heating temperature is 95 ℃ and the pressure is 120 kN/m.
Example 4
The difference from the embodiment 1 is that the preparation method of the high-transfer inkjet thermal transfer base paper comprises the following preparation steps:
(1) preparing slurry: mixing and pulping the raw material slurry and the auxiliary agent to prepare mixed slurry; the raw material pulp comprises 20% of bleached softwood pulp and 80% of bleached broad-leaf pulp, the pulp degree is 35 DEG SR, and the wet weight is 2 g; the auxiliary agents and the dosage thereof are respectively as follows: the dosage of the degasifier is 0.8kg per ton of paper; the dosage of the cationic starch and the ton of paper is 12 kg; defoaming agent, the dosage of each ton of paper is 0.5 kg;
(2) sizing pretreatment: soaking the mixed pulp in a white dextrin solution, dehydrating the net part, squeezing and drying to obtain raw paper; the volume ratio of the white dextrin solution to the mixed slurry is 1: 1.4;
(3) sizing: performing surface sizing treatment, namely performing surface sizing on the raw material paper in the step (2) by adopting a modified octadecyl methacrylate-erucamide propyl hydroxysulfobetaine-styrene polymer to obtain a paper sheet subjected to surface sizing treatment; the sizing method adopts a blade coating method and an air knife coating method which are alternately carried out, and the coating speed is 1 m/min. The preparation method of the modified octadecyl methacrylate-erucamidopropyl hydroxysultaine-styrene polymer comprises the following steps:
A. preparing a seed emulsion: adding distilled water, octadecyl methacrylate and erucamidopropyl hydroxysulfobetaine into a container under magnetic stirring, adding catalyst tetrabutyl titanate and reagent dodecylammonium chloride after completely dissolving, controlling the temperature at 75 ℃, and reacting for 0.8h to obtain octadecyl methacrylate-erucamidopropyl hydroxysulfobetaine seed liquid. The ratio of the distilled water to the octadecyl methacrylate to the erucamidopropylhydroxysultaine to the tetrabutyl titanate to the dodecylammonium chloride is as follows: 200 ml: 1.2 mol: 1.4 mol: 20 g: 80 ml.
B. Preparation of the polymer: adding styrene into the seed liquid, slowly heating to 98 ℃, reacting for 2.2 hours to obtain semitransparent viscous liquid, and adjusting the pH value to 6.9 when the temperature of the liquid is reduced to room temperature; the molar ratio of the styrene to the octadecyl methacrylate-erucamidopropyl hydroxysultaine seed liquid is 3.5: 1;
C. hydrophilic modified polymer: adding 2, 2-dimethylolpropionic acid into the polymerized polymer solution, heating to 60 ℃, and stirring for 1.5 hours to obtain the modified octadecyl methacrylate-erucamide propyl hydroxysultaine-styrene polymer. In step C, the molar ratio of 2, 2-dimethylolpropionic acid to polymer is 1: 1.4.
(4) sizing post-treatment: and carrying out post-sectional drying, press polishing and finishing on the paper sheet subjected to surface sizing treatment, and rolling to obtain a finished product. The sectional drying conditions are as follows: slowly heating to 65 deg.C, drying for 1.3h, and heating to 115 deg.C, and drying for 45 min. The calendering finishing conditions are as follows: the heating temperature is 95 ℃ and the pressure is 120 kN/m.
Example 5
The difference from the embodiment 1 is that the preparation method of the high-transfer inkjet thermal transfer base paper comprises the following preparation steps:
(1) preparing slurry: mixing and pulping the raw material slurry and the auxiliary agent to prepare mixed slurry; the raw material pulp comprises 40% bleached softwood pulp and 60% bleached broadleaf pulp, the pulp degrees are both 45 DEG SR, and the wet weight is 2 g; the auxiliary agents and the dosage thereof are respectively as follows: the dosage of the degasifier is 0.8kg per ton of paper; the dosage of the cationic starch and the ton of paper is 12 kg; defoaming agent, the dosage of each ton of paper is 0.5 kg;
(2) sizing pretreatment: soaking the mixed pulp in a white dextrin solution, dehydrating the net part, squeezing and drying to obtain raw paper; the volume ratio of the white dextrin solution to the mixed slurry is 1: 1.4;
(3) sizing: performing surface sizing treatment, namely performing surface sizing on the raw material paper in the step (2) by adopting a modified octadecyl methacrylate-erucamide propyl hydroxysulfobetaine-styrene polymer to obtain a paper sheet subjected to surface sizing treatment; the sizing method adopts a blade coating method and an air knife coating method which are alternately carried out, and the coating speed is 1.5 m/min. The preparation method of the modified octadecyl methacrylate-erucamidopropyl hydroxysultaine-styrene polymer comprises the following steps: A. preparing a seed emulsion: adding distilled water, octadecyl methacrylate and erucamidopropyl hydroxysulfobetaine into a container under magnetic stirring, adding catalyst tetrabutyl titanate and reagent dodecylammonium chloride after completely dissolving, controlling the temperature at 75 ℃, and reacting for 0.8h to obtain octadecyl methacrylate-erucamidopropyl hydroxysulfobetaine seed liquid. The ratio of the distilled water to the octadecyl methacrylate to the erucamidopropylhydroxysultaine to the tetrabutyl titanate to the dodecylammonium chloride is as follows: 200 ml: 1.2 mol: 1.4 mol: 20 g: 100 ml.
B. Preparation of the polymer: adding styrene into the seed liquid, slowly heating to 98 ℃, reacting for 2.2 hours to obtain semitransparent viscous liquid, and adjusting the pH value to 6.9 when the temperature of the liquid is reduced to room temperature; the molar ratio of the styrene to the octadecyl methacrylate-erucamidopropyl hydroxysultaine seed liquid is 4: 1;
C. hydrophilic modified polymer: adding 2, 2-dimethylolpropionic acid into the polymerized polymer solution, heating to 70 ℃, and stirring for 1h to obtain the modified octadecyl methacrylate-erucamide propyl hydroxysultaine-styrene polymer. The molar ratio of 2, 2-dimethylolpropionic acid to polymer in step C was 1.2: 1.2.
(4) sizing post-treatment: and carrying out post-sectional drying, press polishing and finishing on the paper sheet subjected to surface sizing treatment, and rolling to obtain a finished product. The sectional drying conditions are as follows: slowly heating to 65 deg.C, drying for 1.3h, and heating to 115 deg.C, and drying for 45 min. The calendering finishing conditions are as follows: the heating temperature is 95 ℃ and the pressure is 120 kN/m.
Comparative example 1 (different from example 1 in that octadecyl methacrylate-erucamidopropylhydroxysultaine-styrene polymer was prepared in a stepwise manner)
A preparation method of high-transfer inkjet thermal transfer base paper comprises the following preparation steps:
(1) preparing slurry: mixing and pulping the raw material slurry and the auxiliary agent to prepare mixed slurry; the raw material pulp comprises 30% bleached softwood pulp and 70% bleached broadleaf pulp, the pulp degree is 40 DEG SR, and the wet weight is 2 g; the auxiliary agents and the dosage thereof are respectively as follows: the dosage of the degasifier is 0.8kg per ton of paper; the dosage of the cationic starch and the ton of paper is 12 kg; defoaming agent, the dosage of each ton of paper is 0.5 kg;
(2) sizing pretreatment: soaking the mixed pulp in a white dextrin solution, dehydrating the net part, squeezing and drying to obtain raw paper; the volume ratio of the white dextrin solution to the mixed slurry is 1: 1.2;
(3) sizing: performing surface sizing treatment, namely performing surface sizing on the raw material paper in the step (2) by adopting a modified octadecyl methacrylate-erucamide propyl hydroxysulfobetaine-styrene polymer to obtain a paper sheet subjected to surface sizing treatment; the sizing method adopts a blade coating method and an air knife coating method which are alternately carried out, and the coating speed is 1.3 m/min. The preparation method of the modified octadecyl methacrylate-erucamidopropyl hydroxysultaine-styrene polymer comprises the following steps: A. preparation of the polymer: adding distilled water, octadecyl methacrylate and erucamidopropyl hydroxysulfobetaine into a container under magnetic stirring, adding styrene and a catalyst tetrabutyl titanate after complete dissolution, controlling the temperature at 75 ℃, reacting for 0.8h, slowly heating to 98 ℃, reacting for 2.2h to obtain semitransparent viscous liquid, and adjusting the pH value to 6.9 when the temperature of the liquid is reduced to room temperature. The ratio of the distilled water to the stearyl methacrylate to the erucamidopropylhydroxysultaine to the tetrabutyl titanate to the styrene is as follows: 220 ml: 1.1 mol: 1.2 mol: 20 g: 2.5 mol.
B. Hydrophilic modified polymer: adding 2, 2-dimethylolpropionic acid into the polymerized polymer solution, heating to 65 ℃, and stirring for 1.2 hours to obtain the modified octadecyl methacrylate-erucamide propyl hydroxysultaine-styrene polymer. The molar ratio of 2, 2-dimethylolpropionic acid to polymer in step C was 1.1: 1.2.
(4) sizing post-treatment: and carrying out post-sectional drying, press polishing and finishing on the paper sheet subjected to surface sizing treatment, and rolling to obtain a finished product. The sectional drying conditions are as follows: slowly heating to 65 deg.C, drying for 1.3h, and heating to 115 deg.C, and drying for 45 min. The calendering finishing conditions are as follows: the heating temperature is 95 ℃ and the pressure is 120 kN/m.
Comparative example 2 (differing from example 1 in that the blade coating speed was too fast at 5 m/min.)
A preparation method of high-transfer inkjet thermal transfer base paper comprises the following preparation steps:
(1) preparing slurry: mixing and pulping the raw material slurry and the auxiliary agent to prepare mixed slurry; the raw material pulp comprises 30% bleached softwood pulp and 70% bleached broadleaf pulp, the pulp degree is 40 DEG SR, and the wet weight is 2 g; the auxiliary agents and the dosage thereof are respectively as follows: the dosage of the degasifier is 0.8kg per ton of paper; the dosage of the cationic starch and the ton of paper is 12 kg; defoaming agent, the dosage of each ton of paper is 0.5 kg;
(2) sizing pretreatment: soaking the mixed pulp in a white dextrin solution, dehydrating the net part, squeezing and drying to obtain raw paper; the volume ratio of the white dextrin solution to the mixed slurry is 1: 1.2;
(3) sizing: performing surface sizing treatment, namely performing surface sizing on the raw material paper in the step (2) by adopting a modified octadecyl methacrylate-erucamide propyl hydroxysulfobetaine-styrene polymer to obtain a paper sheet subjected to surface sizing treatment; the sizing method adopts a blade coating method and an air knife coating method which are alternately carried out, and the coating speed is 5 m/min. The preparation method of the modified octadecyl methacrylate-erucamidopropyl hydroxysultaine-styrene polymer comprises the following steps:
A. preparing a seed emulsion: adding distilled water, octadecyl methacrylate and erucamidopropyl hydroxysulfobetaine into a container under magnetic stirring, adding catalyst tetrabutyl titanate and reagent dodecylammonium chloride after completely dissolving, controlling the temperature at 75 ℃, and reacting for 0.8h to obtain octadecyl methacrylate-erucamidopropyl hydroxysulfobetaine seed liquid. The ratio of the distilled water to the octadecyl methacrylate to the erucamidopropylhydroxysultaine to the tetrabutyl titanate to the dodecylammonium chloride is as follows: 220 ml: 1.1 mol: 1.2 mol: 20 g: 90 ml.
B. Preparation of the polymer: adding styrene into the seed liquid, slowly heating to 98 ℃, reacting for 2.2 hours to obtain semitransparent viscous liquid, and adjusting the pH value to 6.9 when the temperature of the liquid is reduced to room temperature; the molar ratio of the styrene to the octadecyl methacrylate-erucamidopropylhydroxysultaine seed liquid is 3.8: 1;
C. hydrophilic modified polymer: adding 2, 2-dimethylolpropionic acid into the polymerized polymer solution, heating to 65 ℃, and stirring for 1.2 hours to obtain the modified octadecyl methacrylate-erucamide propyl hydroxysultaine-styrene polymer. The molar ratio of 2, 2-dimethylolpropionic acid to polymer in step C was 1.1: 1.2.
(4) sizing post-treatment: and carrying out post-sectional drying, press polishing and finishing on the paper sheet subjected to surface sizing treatment, and rolling to obtain a finished product. The sectional drying conditions are as follows: slowly heating to 65 deg.C, drying for 1.3h, and heating to 115 deg.C, and drying for 45 min. The calendering finishing conditions are as follows: the heating temperature is 95 ℃ and the pressure is 120 kN/m.
Comparative example 3 (distinguished from example 1 in that octadecyl methacrylate-erucamidopropylhydroxysultaine-styrene polymer was not hydrophilically modified.)
A preparation method of high-transfer inkjet thermal transfer base paper comprises the following preparation steps:
(1) preparing slurry: mixing and pulping the raw material slurry and the auxiliary agent to prepare mixed slurry; the raw material pulp comprises 30% bleached softwood pulp and 70% bleached broadleaf pulp, the pulp degree is 40 DEG SR, and the wet weight is 2 g; the auxiliary agents and the dosage thereof are respectively as follows: the dosage of the degasifier is 0.8kg per ton of paper; the dosage of the cationic starch and the ton of paper is 12 kg; defoaming agent, the dosage of each ton of paper is 0.5 kg;
(2) sizing pretreatment: soaking the mixed pulp in a white dextrin solution, dehydrating the net part, squeezing and drying to obtain raw paper; the volume ratio of the white dextrin solution to the mixed slurry is 1: 1.2;
(3) sizing: performing surface sizing treatment, namely performing surface sizing on the raw material paper in the step (2) by adopting a modified octadecyl methacrylate-erucamide propyl hydroxysulfobetaine-styrene polymer to obtain a paper sheet subjected to surface sizing treatment; the sizing method adopts a blade coating method and an air knife coating method which are alternately carried out, and the coating speed is 1.3 m/min. The preparation method of the modified octadecyl methacrylate-erucamidopropyl hydroxysultaine-styrene polymer comprises the following steps: A. preparing a seed emulsion: adding distilled water, octadecyl methacrylate and erucamidopropyl hydroxysulfobetaine into a container under magnetic stirring, adding catalyst tetrabutyl titanate and reagent dodecylammonium chloride after completely dissolving, controlling the temperature at 75 ℃, and reacting for 0.8h to obtain octadecyl methacrylate-erucamidopropyl hydroxysulfobetaine seed liquid. The ratio of the distilled water to the octadecyl methacrylate to the erucamidopropylhydroxysultaine to the tetrabutyl titanate to the dodecylammonium chloride is as follows: 220 ml: 1.1 mol: 1.2 mol: 20 g: 90 ml.
B. Preparation of the polymer: adding styrene into the seed liquid, slowly heating to 98 ℃, reacting for 2.2 hours to obtain semitransparent viscous liquid, and adjusting the pH value to 6.9 when the temperature of the liquid is reduced to room temperature; the molar ratio of the styrene to the octadecyl methacrylate-erucamidopropylhydroxysultaine seed liquid is 3.8: 1.
(4) sizing post-treatment: and carrying out post-sectional drying, press polishing and finishing on the paper sheet subjected to surface sizing treatment, and rolling to obtain a finished product. The sectional drying conditions are as follows: slowly heating to 65 deg.C, drying for 1.3h, and heating to 115 deg.C, and drying for 45 min. The calendering finishing conditions are as follows: the heating temperature is 95 ℃ and the pressure is 120 kN/m.
Comparative example 4 (different from example 1 in that drying was not conducted in stages and direct high-temperature stage drying was conducted.)
A preparation method of high-transfer inkjet thermal transfer base paper comprises the following preparation steps:
(1) preparing slurry: mixing and pulping the raw material slurry and the auxiliary agent to prepare mixed slurry; the raw material pulp comprises 30% bleached softwood pulp and 70% bleached broadleaf pulp, the pulp degree is 40 DEG SR, and the wet weight is 2 g; the auxiliary agents and the dosage thereof are respectively as follows: the dosage of the degasifier is 0.8kg per ton of paper; the dosage of the cationic starch and the ton of paper is 12 kg; defoaming agent, the dosage of each ton of paper is 0.5 kg;
(2) sizing pretreatment: soaking the mixed pulp in a white dextrin solution, dehydrating the net part, squeezing and drying to obtain raw paper; the volume ratio of the white dextrin solution to the mixed slurry is 1: 1.2;
(3) sizing: performing surface sizing treatment, namely performing surface sizing on the raw material paper in the step (2) by adopting a modified octadecyl methacrylate-erucamide propyl hydroxysulfobetaine-styrene polymer to obtain a paper sheet subjected to surface sizing treatment; the sizing method adopts a blade coating method and an air knife coating method which are alternately carried out, and the coating speed is 1.3 m/min. The preparation method of the modified octadecyl methacrylate-erucamidopropyl hydroxysultaine-styrene polymer comprises the following steps: A. preparing a seed emulsion: adding distilled water, octadecyl methacrylate and erucamidopropyl hydroxysulfobetaine into a container under magnetic stirring, adding catalyst tetrabutyl titanate and reagent dodecylammonium chloride after completely dissolving, controlling the temperature at 75 ℃, and reacting for 0.8h to obtain octadecyl methacrylate-erucamidopropyl hydroxysulfobetaine seed liquid. The ratio of the distilled water to the octadecyl methacrylate to the erucamidopropylhydroxysultaine to the tetrabutyl titanate to the dodecylammonium chloride is as follows: 220 ml: 1.1 mol: 1.2 mol: 20 g: 90 ml.
B. Preparation of the polymer: adding styrene into the seed liquid, slowly heating to 98 ℃, reacting for 2.2 hours to obtain semitransparent viscous liquid, and adjusting the pH value to 6.9 when the temperature of the liquid is reduced to room temperature; the molar ratio of the styrene to the octadecyl methacrylate-erucamidopropylhydroxysultaine seed liquid is 3.8: 1;
C. hydrophilic modified polymer: adding 2, 2-dimethylolpropionic acid into the polymerized polymer solution, heating to 65 ℃, and stirring for 1.2 hours to obtain the modified octadecyl methacrylate-erucamide propyl hydroxysultaine-styrene polymer. The molar ratio of 2, 2-dimethylolpropionic acid to polymer in step C was 1.1: 1.2.
(4) sizing post-treatment: and carrying out post-sectional drying, press polishing and finishing on the paper sheet subjected to surface sizing treatment, and rolling to obtain a finished product. The sectional drying conditions are as follows: directly heating to 115 ℃ and drying for 2.5 h. The calendering finishing conditions are as follows: the heating temperature is 95 ℃ and the pressure is 120 kN/m.
TABLE 1 various performance indexes of high-transfer spray-painting thermal transfer base paper
And (4) conclusion: examples 1-5 show that, in the preparation formula and process range of the invention, by optimizing the base paper process and coating process of the inkjet thermal transfer base paper, the inkjet thermal transfer base paper with good high transfer performance is developed, which can meet the transfer effect of deep color of customers, high density and transfer rate, good water resistance and low thermal shrinkage.
Comparative example 1 differs from example 1 in that a step-by-step process was used to prepare a stearyl methacrylate-erucamidopropylhydroxysultaine-styrene polymer; the polymer is prepared by a step-by-step method, so that the molecular weight and the macromolecular diameter distribution range of the obtained polymer macromolecules are larger, styrene units are directly polymerized on the main chain of the polymer, the flexibility of the polymer is poor, the tensile strength of an adhesive film is increased, the elongation at break is reduced, the brittleness temperature is increased, the hardness is increased, and the mechanical property of the film is further reduced.
Comparative example 2 differs from example 1 in that the blade coating speed was too fast at 5 m/min; because the macromolecular polymerization of the glue solution contains the polymerization monomer with a longer carbon chain structure and the benzene ring structure, if the coating speed is too high, the macromolecular chains are not distributed in order, so that the macromolecular framework in the glue layer contains more defects, and the mechanical property of the base paper is reduced.
Comparative example 3 differs from example 1 in that the octadecyl methacrylate-erucamidopropylhydroxysultaine-styrene polymer was not hydrophilically modified; the printing ink contains a large amount of printing ink dissolving solvent besides printing ink components, if transfer printing base paper on the solvent only contains oleophilic groups, the oleophilic groups have poor polarity, and the transfer printing base paper has poor affinity to the solvent, which inevitably causes separation of printing ink solute and polar solvent in the printing ink, and is not favorable for permeation and attachment of the printing ink on a printed object after transfer printing.
Comparative example 4 differs from example 1 in that the drying was not staged, and was directly high temperature stage dried; the water on the surface of the sizing agent is evaporated to dryness quickly, the surface of the sizing agent forms a film quickly, water vapor and micromolecule bubbles in the sizing agent cannot escape in time, and defects are caused in the inside instantly, but the compactness of a coating film of the high-transfer printing thermal transfer base paper is reduced due to excessive gaps, the external waterproof capability is also reduced, the overall strength of the high-transfer printing thermal transfer base paper is poor, and the number of impurity particles is large; meanwhile, polymer macromolecular chains cannot be fully fused in a flowing manner, the bonding performance is poor, and the mechanical property of the high-transfer printing thermal transfer base paper is reduced.
The embodiments described above are merely preferred embodiments of the present invention, which is not intended to be limiting in any way, and other variations and modifications are possible without departing from the scope of the invention as set forth in the claims below.
The raw materials and equipment used in the invention are common raw materials and equipment in the field if not specified; the methods used in the present invention are conventional in the art unless otherwise specified.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (10)
1. A preparation method of high-transfer inkjet thermal transfer base paper is characterized by comprising the following preparation steps:
(1) preparing slurry: mixing and pulping the raw material slurry and the auxiliary agent to prepare mixed slurry;
(2) sizing pretreatment: soaking the mixed pulp in a white dextrin solution, dehydrating the net part, squeezing and drying to obtain raw paper;
(3) sizing: performing surface sizing treatment, namely performing surface sizing on the raw material paper in the step (2) by adopting a modified octadecyl methacrylate-erucamide propyl hydroxysulfobetaine-styrene polymer to obtain a paper sheet subjected to surface sizing treatment;
(4) sizing post-treatment: and carrying out post-sectional drying, press polishing and finishing on the paper sheet subjected to surface sizing treatment, and rolling to obtain a finished product.
2. The preparation method of the high-transfer inkjet thermal transfer base paper as claimed in claim 1, wherein the raw material slurry in the step (1) comprises 20-40% of bleached softwood pulp and 60-80% of bleached broad-leaved pulp, the pulp degrees are both 35-45 ℃ SR, and the wet weight is 1.5-2.5 g.
3. The preparation method of the high-transfer inkjet thermal transfer base paper as claimed in claim 1, wherein the auxiliary agents and the amounts thereof are respectively as follows: the dosage of the degasifier is 0.5-1.0kg per ton of paper; the dosage of the cationic starch and the ton of paper is 10-15 kg; the dosage of the defoaming agent is 0.3-0.6kg per ton of paper.
4. The preparation method of the high-transfer inkjet thermal transfer base paper as claimed in claim 1, wherein the volume ratio of the white dextrin solution to the mixed slurry in the step (2) is 1-1.2: 1-1.4.
5. The method for preparing the thermal transfer base paper for high-transfer inkjet printing according to claim 1, wherein in the step (3), the preparation of the modified octadecyl methacrylate-erucamidopropyl hydroxysultaine-styrene polymer comprises the following steps:
A. preparing a seed emulsion: adding distilled water, octadecyl methacrylate and erucamidopropyl hydroxysulfobetaine into a container under magnetic stirring, adding tetrabutyl titanate serving as a catalyst and dodecyl ammonium chloride serving as an emulsifier after complete dissolution, controlling the temperature to be 70-80 ℃, and reacting for 0.5-1h to obtain octadecyl methacrylate-erucamidopropyl hydroxysulfobetaine seed liquid;
B. preparation of the polymer: adding styrene into the seed liquid, slowly heating to 96-100 ℃, reacting for 2-2.5h to obtain semitransparent viscous liquid, and adjusting the pH value to 6.8-7 when the temperature of the liquid is reduced to room temperature;
C. hydrophilic modified polymer: adding 2, 2-dimethylolpropionic acid into the polymerized polymer solution, heating to 60-70 ℃, and stirring for 1-1.5h to obtain the modified octadecyl methacrylate-erucamide propyl hydroxysultaine-styrene polymer.
6. The method for preparing the thermal transfer base paper for high-transfer inkjet printing according to claim 5, wherein the ratio of the distilled water, the octadecyl methacrylate, the erucamidopropylhydroxysulfobetaine, the tetrabutyl titanate and the dodecylammonium chloride in the step A is as follows: 200-250 ml: 1-1.2 mol: 1-1.4 mol: 20 g: 80-100 ml.
7. The method for preparing the high-transfer inkjet thermal transfer base paper as claimed in claim 5, wherein the molar ratio of the styrene to the octadecyl methacrylate-erucamidopropyl hydroxysulfobetaine seed liquid in the step B is 3.5-4: 1; in the step C, the molar ratio of the 2, 2-dimethylolpropionic acid to the polymer is 1-1.2: 1-1.4.
8. The method for preparing the thermal transfer base paper for high-transfer inkjet printing according to claim 1, wherein the sizing in the step (3) is performed by alternately performing a blade coating mode and an air knife coating mode, and the coating speed is 1-1.5 m/min.
9. The method for preparing the thermal transfer base paper for high-transfer inkjet printing according to claim 1, wherein the step (4) comprises the following steps: slowly heating to 60-70 deg.C, drying for 1.2-1.5h, heating to 110-120 deg.C, and drying for 40-50 min.
10. The preparation method of the high-transfer inkjet thermal transfer base paper as claimed in claim 1, wherein the calendering and finishing conditions in the step (4) are as follows: the heating temperature is 90-100 ℃, and the pressure is 100-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010456836.8A CN111622007B (en) | 2020-05-26 | 2020-05-26 | Preparation method of high-transfer inkjet thermal transfer base paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010456836.8A CN111622007B (en) | 2020-05-26 | 2020-05-26 | Preparation method of high-transfer inkjet thermal transfer base paper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111622007A true CN111622007A (en) | 2020-09-04 |
| CN111622007B CN111622007B (en) | 2021-12-31 |
Family
ID=72258207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010456836.8A Active CN111622007B (en) | 2020-05-26 | 2020-05-26 | Preparation method of high-transfer inkjet thermal transfer base paper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111622007B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101338005A (en) * | 2008-03-11 | 2009-01-07 | 郑勇 | Process for synthesizing acrylic ester copolymer of ultra-high molecular mass |
| CN101787098A (en) * | 2010-02-26 | 2010-07-28 | 华南理工大学 | Preparation method and application of acrylate heterozygotic emulsion |
| CN105061665A (en) * | 2015-07-31 | 2015-11-18 | 华南理工大学 | Hydroxypolyacrylate emulsion, and preparation method and application thereof |
| CN108677588A (en) * | 2018-05-15 | 2018-10-19 | 浙江永鑫特种纸有限公司 | Numerial code spray drawing thermal transfer body paper paper machine and papermaking process |
| CN108755242A (en) * | 2018-05-21 | 2018-11-06 | 浙江永鑫特种纸有限公司 | Numerial code spray drawing thermal transfer base paper production method |
| CN109608605A (en) * | 2017-12-19 | 2019-04-12 | 传化智联股份有限公司 | A kind of ion-non-ion aqueous polyurethane dispersion preparation |
| CN109811579A (en) * | 2019-03-04 | 2019-05-28 | 浙江哲丰新材料有限公司 | The processing method of high rate of transform numerial code spray drawing base paper |
| US20190217647A1 (en) * | 2016-06-14 | 2019-07-18 | Mitsubishi Paper Mills Limited | Transfer paper |
| CN110067154A (en) * | 2018-01-24 | 2019-07-30 | 金东纸业（江苏）股份有限公司 | A kind of control method of paper printing ink absorbent properties |
| CN210458774U (en) * | 2019-07-05 | 2020-05-05 | 莒县瑜丰工贸有限公司 | Air knife type coating device for art super-sensitive paper |
-
2020
- 2020-05-26 CN CN202010456836.8A patent/CN111622007B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101338005A (en) * | 2008-03-11 | 2009-01-07 | 郑勇 | Process for synthesizing acrylic ester copolymer of ultra-high molecular mass |
| CN101787098A (en) * | 2010-02-26 | 2010-07-28 | 华南理工大学 | Preparation method and application of acrylate heterozygotic emulsion |
| CN105061665A (en) * | 2015-07-31 | 2015-11-18 | 华南理工大学 | Hydroxypolyacrylate emulsion, and preparation method and application thereof |
| US20190217647A1 (en) * | 2016-06-14 | 2019-07-18 | Mitsubishi Paper Mills Limited | Transfer paper |
| CN109608605A (en) * | 2017-12-19 | 2019-04-12 | 传化智联股份有限公司 | A kind of ion-non-ion aqueous polyurethane dispersion preparation |
| CN110067154A (en) * | 2018-01-24 | 2019-07-30 | 金东纸业（江苏）股份有限公司 | A kind of control method of paper printing ink absorbent properties |
| CN108677588A (en) * | 2018-05-15 | 2018-10-19 | 浙江永鑫特种纸有限公司 | Numerial code spray drawing thermal transfer body paper paper machine and papermaking process |
| CN108755242A (en) * | 2018-05-21 | 2018-11-06 | 浙江永鑫特种纸有限公司 | Numerial code spray drawing thermal transfer base paper production method |
| CN109811579A (en) * | 2019-03-04 | 2019-05-28 | 浙江哲丰新材料有限公司 | The processing method of high rate of transform numerial code spray drawing base paper |
| CN210458774U (en) * | 2019-07-05 | 2020-05-05 | 莒县瑜丰工贸有限公司 | Air knife type coating device for art super-sensitive paper |
Non-Patent Citations (1)
| Title |
|---|
| 刘亚伟等: "《淀粉生产及其深加工技术》", 31 July 2001, 中国轻工业出版社 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111622007B (en) | 2021-12-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Mousavi et al. | Application of cellulose nanofibril (CNF) as coating on paperboard at moderate solids content and high coating speed using blade coater | |
| AU2010315067B9 (en) | Surface application of polymers and polymer mixtures to improve paper strength | |
| KR20170052564A (en) | Sizing composition, its use and a method for producing paper, board or the like | |
| US20060260774A1 (en) | Anionic-cationic polymer blend for surface size | |
| CN111676732B (en) | Preparation method of low-basis-weight transfer printing base paper with stable seepage prevention and heat penetration | |
| CN105061774B (en) | A kind of paper making intensifier and preparation method thereof | |
| CN103103877A (en) | Surface sizing enhancer | |
| CN111622007B (en) | Preparation method of high-transfer inkjet thermal transfer base paper | |
| Ni et al. | Research on improving the surface hydrophobicity of paper coated by poly-vinyl alcohol-itaconic acid grafting copolymer | |
| Samyn et al. | Engineered nanomaterials for papermaking industry | |
| CN1407953A (en) | Architectural concrete having reinforcing polymer and production thereof | |
| CN111005258A (en) | Light coated craft paper and production method thereof | |
| CN113774715B (en) | Preparation method of inorganic-organic hybrid material modified polymer sizing reinforcing agent | |
| CN113756128B (en) | Sizing agent for papermaking based on polymer graft modification phosphogypsum whisker reinforcement and preparation method thereof | |
| CN111608010B (en) | Preparation method of high-strength low-static CTP lining paper | |
| Wu et al. | Synthesis of cationic styrene-acrylic acid ester copolymer emulsion for paper sizing | |
| CN113957741A (en) | Titanium composite material and application thereof in preparation of base paper | |
| US7112623B2 (en) | Coating composition for the manufacture of printable coated paper and board, component of the coating composition and process for the manufacture of paper and board | |
| CN105237648A (en) | Highly-branched starch modified by glyoxal crosslinked polymer, preparation method and application thereof | |
| CA1052519A (en) | Method for producing a fibrous synthetic paper forming material | |
| CN111622018B (en) | Production method of large ink level printing biblical paper | |
| CN102351987A (en) | Reactive emulsifier core shell surface sizing agent and preparation method thereof | |
| JP5155716B2 (en) | Coating base paper for printing and method for producing coated paper | |
| CN117758543A (en) | Offset printing surface sizing solution and preparation method and application thereof | |
| CN107059480B (en) | One kind writing paper as made from non-timber class paper pulp and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |