CN114737413A - Thermal sublimation transfer printing paper and production process thereof - Google Patents
Thermal sublimation transfer printing paper and production process thereof Download PDFInfo
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- CN114737413A CN114737413A CN202210289178.7A CN202210289178A CN114737413A CN 114737413 A CN114737413 A CN 114737413A CN 202210289178 A CN202210289178 A CN 202210289178A CN 114737413 A CN114737413 A CN 114737413A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- 238000010023 transfer printing Methods 0.000 title claims description 33
- 238000004513 sizing Methods 0.000 claims abstract description 115
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Images
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
- B44C1/16—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like
- B44C1/165—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like for decalcomanias; sheet material therefor
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
- D21C5/005—Treatment of cellulose-containing material with microorganisms or enzymes
-
- 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
- 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
- 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
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/02—Chemical or chemomechanical or chemothermomechanical pulp
- D21H11/04—Kraft or sulfate pulp
-
- 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/24—Polysaccharides
- D21H17/28—Starch
- D21H17/29—Starch cationic
-
- 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
- D21H21/06—Paper forming aids
- D21H21/10—Retention agents or drainage improvers
-
- 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
- D21H21/16—Sizing or water-repelling 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
- D21H21/18—Reinforcing agents
- D21H21/20—Wet strength agents
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Microbiology (AREA)
- Paper (AREA)
Abstract
The application discloses thermal sublimation changes printing paper and production technology thereof, wherein, thermal sublimation changes printing paper's production technology and includes: pulping bleached sulfate hardwood pulp or a mixed pulp of the bleached sulfate hardwood pulp and bleached sulfate softwood pulp by using a biological pulping enzyme to obtain a raw pulp; adding filler, cationic starch, wet strength agent, internal sizing agent, pulp water-resisting agent and retention aid into the raw pulp liquid to obtain papermaking stock solution; forming and drying the papermaking stock solution to obtain single-flake base paper; and carrying out sizing treatment on the surface of the single-colored base paper by using a surface sizing solution to obtain the thermal sublimation transfer paper. By the method, the high printing ink transfer rate of the thermal sublimation paper is ensured while the printing ink drying speed is improved.
Description
Technical Field
The invention relates to the technical field of paper, in particular to thermal sublimation transfer paper and a production process thereof.
Background
The thermal sublimation transfer paper is paper manufactured by utilizing a thermal sublimation transfer printing technology, wherein the thermal sublimation transfer printing technology is a technology of printing designed pictures and texts and the like on thermal sublimation transfer printing paper by utilizing a printing mode, then closely attaching the thermal transfer printing paper to a printing stock, and transferring the printed pictures and texts and the like onto the printing stock through heating and pressurizing treatment. Compared with the traditional printing process, the thermal sublimation transfer printing technology saves high energy consumption equipment, has no environmental pollution, has the advantages of exquisite transfer printing image and text, printing effect, application range and the like which are not comparable to the traditional printing and dyeing process, and can be widely applied to the fields of textile printing and dyeing, advertising, architectural decoration, ceramic printing and the like.
The thermal sublimation transfer printing paper that is common at present includes: a thermal sublimation transfer paper coated with functional coating and a transfer base paper without coating. Although the thermal sublimation transfer paper produced by using the functional coating has high ink transfer rate and good transfer effect, the ink has long drying time and complicated production process, and expensive materials such as silicon dioxide are required to be added in the process, so that the processing cost is greatly increased. The uncoated transfer base paper has no coating on the surface, so that the surface gap is large, ink is easy to permeate into the base paper, and the problems of low ink transfer rate, large ink consumption, unclear transfer printing and the like are caused.
With the higher and higher requirements of the market on the digital printing speed, the number of the spray heads of the digital printer is increased, the speed of the digital printer is increased, and higher requirements are undoubtedly put forward on the thermal sublimation transfer paper produced by the two methods. Therefore, the digital printing market urgently needs to develop a thermal sublimation transfer paper which has high transfer rate, high drying speed, low cost and excellent transfer rate.
Disclosure of Invention
The technical problem that this application mainly solved provides a thermal sublimation changes printing paper and production technology to when improving printing ink drying speed, guarantee thermal sublimation paper's high printing ink transfer rate.
For solving above-mentioned problem, this application provides thermal sublimation changes production technology of printing paper, includes: pulping bleached sulfate hardwood pulp or a mixed pulp of the bleached sulfate hardwood pulp and bleached sulfate softwood pulp by using a biological pulping enzyme to obtain a raw pulp; adding filler, cationic starch, wet strength agent, internal sizing agent, pulp water-resisting agent and retention aid into the raw pulp liquid to obtain papermaking stock solution; making the stock solution for papermaking to obtain single-strand base paper; and carrying out sizing treatment on the surface of the single-colored base paper by using a surface sizing solution to obtain the thermal sublimation transfer paper.
Preferably, the step of performing pulping treatment on the bleached sulfate hardwood pulp or the mixed pulp of the bleached sulfate hardwood pulp and the bleached sulfate softwood pulp by using a biological pulping enzyme to obtain raw pulp comprises the following steps: mixing the bleached sulfate softwood pulp with the mass fraction not higher than 20% and the bleached sulfate hardwood pulp with the mass fraction not lower than 80% to obtain pulp; adding 0.5-1.5 kg/ton pulp of the biological pulping enzyme into the pulp to obtain first pulp with the pulping concentration of 10% -15%; pulping the first pulp by using a high-concentration pulping machine to obtain second pulp with the pulping degree of 20-30 DEG SR, the wet weight of the fiber of 8-10g and the pulping concentration of 2-3%; and (3) devillicating and brooming the second pulp by using a double-disc refiner to obtain the original pulp with the beating degree of 35-50 DEG SR and the wet weight of the fiber of 2-4 g.
Preferably, the step of adding filler, cationic starch, wet strength agent, internal sizing agent, slurry water repellent agent and retention aid to the raw pulp liquid to obtain paper making raw liquid comprises: adding 50-200 kg/ton pulp filler, 5-10 kg/ton pulp cationic starch and 0-30 kg/ton pulp wet strength agent into the raw pulp by using a pulp proportioning pool, and uniformly mixing; adding 5-10 kg/ton pulp internal sizing agent, 5-20 kg/ton pulp water repellent agent and 0.5-5 kg/ton pulp retention aid into the raw pulp liquid after uniform mixing, and uniformly mixing to obtain the papermaking stock solution with the pulp concentration of 1.0-1.5%.
Preferably, the step of performing paper making treatment on the paper making stock solution to obtain single-ply base paper comprises: processing the papermaking stock solution by a wire part and a pressing part to obtain a wet paper web; and drying the wet paper web by using a yankee large drying cylinder to obtain the single-ply base paper.
Preferably, the single-gloss surface of the single-gloss base paper has a smoothness of not less than 70 s.
Preferably, before the step of performing sizing treatment on the surface of the single base paper by using the surface sizing solution to obtain the thermal sublimation transfer paper, the method further comprises the following steps: preparing the surface sizing solution by using a surface sizing agent, a water repellent agent and a blocking agent; wherein the surface sizing agent comprises the following components in parts by weight: the water repellent agent: the barrier agent is 100:5-10: 10-15.
Preferably, the surface sizing agent is one or more of polyvinyl alcohol (PVA), agar and complex chloride salt of fatty acid; wherein the solid content of the surface sizing liquid is 5-15%, the viscosity is 10-15cps, and the temperature is 60 ℃.
Preferably, the step of performing sizing treatment on the surface of the single-ply base paper by using a surface sizing solution to obtain the thermal sublimation transfer paper comprises the following steps: applying the surface sizing solution to the surface of the single-ply base paper by using a sizing machine; wherein, the sizing process adopts one of film transfer type, roller type or dipping sizing.
Preferably, the front sizing amount of the single-ply base paper is controlled to be 2-6g/m2The reverse side sizing amount of the single-ply base paper is controlled to be 0.5-1.5g/m2。
The application also provides thermal sublimation transfer paper which comprises single-face base paper and a surface sizing solution coating covering the surface of the single-face base paper; the covering amount of the surface sizing solution coating on one side of the single-sided base paper is 2-6g/m2The covering amount of the other surface is 0.5-1.5g/m2。
The beneficial effect of this application is: the method comprises the steps of pulping bleached sulfate hardwood pulp or mixed pulp of the bleached sulfate hardwood pulp and bleached sulfate softwood pulp by using biological pulping enzyme to obtain raw pulp, adding filler, cationic starch, a wet strength agent, an internal sizing agent, a pulp water-resisting agent and a retention aid into the raw pulp to obtain papermaking raw liquor, then papermaking the raw liquor to obtain single raw paper, and finally performing sizing treatment on the surface of the single raw paper by using a surface sizing agent to obtain thermal sublimation transfer paper, so that the external coating process of the raw paper machine is omitted, the drying speed of printing ink is improved, and the high printing ink transfer rate of the thermal sublimation paper is also ensured.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart of an embodiment of a production process of a thermal sublimation transfer printing paper of the application;
FIG. 2 is a flowchart illustrating an embodiment of step S11 of FIG. 1;
FIG. 3 is a flowchart illustrating an embodiment of step S12 of FIG. 1;
FIG. 4 is a flowchart illustrating an embodiment of step S13 of FIG. 1;
FIG. 5 is a schematic view of a frame structure of an embodiment of a production process of a thermal sublimation transfer printing paper of the present application;
fig. 6 is a schematic structural diagram of an embodiment of the thermal sublimation transfer paper of the application.
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 obtained by a person skilled in the art based on the embodiments of the present invention without any inventive step, are within the scope of the present invention.
It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used for explaining a specific gesture, and if the specific gesture changes, the directional indications also change accordingly.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein may be combined with other embodiments.
The application provides a production process of thermal sublimation transfer paper, and specifically refers to fig. 1, fig. 1 is a schematic flow chart of an embodiment of the production process of the thermal sublimation transfer paper, as shown in fig. 1, the method includes the following steps:
step S11: the method comprises the steps of pulping bleached sulfate hardwood pulp or a mixed pulp of the bleached sulfate hardwood pulp and bleached sulfate softwood pulp by using biological pulping enzyme to obtain raw pulp.
Which comprises the following steps: the single-component bleached sulfate hardwood pulp is pulped by using biological pulping enzyme, or the mixed pulp of the bleached sulfate hardwood pulp and bleached sulfate softwood pulp is pulped by using the biological pulping enzyme.
Referring to fig. 2, fig. 2 is a flowchart illustrating an embodiment of step S11 in fig. 1. As shown in fig. 2, step S11 specifically includes:
step S21: and mixing the bleached sulfate softwood pulp with the mass fraction not higher than 20% with the bleached sulfate hardwood pulp with the mass fraction not lower than 80% to obtain the pulp.
Wherein the mass fraction of the bleached sulfate softwood pulp in the pulp is between 0 and 20 percent, and the mass fraction of the bleached sulfate hardwood pulp is between 80 and 100 percent. The specific pulp may be 100% bleached sulfate hardwood pulp, or a mixed pulp obtained by mixing 20% bleached sulfate softwood pulp and 80% bleached sulfate hardwood pulp.
Step S22: adding 0.5-1.5 kg/ton pulp biological pulping enzyme into the pulp to obtain first pulp with the pulping concentration of 10% -15%.
Wherein, the biological pulping enzyme is a complex enzyme for papermaking pulping, and is used for pretreatment before pulping of pulp to improve pulping performance. The addition amount of the biological pulping enzyme is added according to the amount of the pulp, and in this embodiment, the addition amount of the biological pulping enzyme is 0.5-1.5 kg/ton pulp, that is, 0.5-1.5kg of biological pulping enzyme is added per ton pulp.
Wherein, the beating concentration refers to the concentration of paper pulp in water during beating. In this embodiment, the beating concentration is controlled to 10% -15% in the first beating process.
Step S23: and pulping the first pulp by using a high-concentration pulping machine to obtain second pulp with the pulping degree of 20-30 DEG SR, the wet weight of the fiber of 8-10g and the pulping concentration of 2-3%.
Wherein, the process of beating the first slurry by the high-consistency pulping machine is the first-stage beating, and the beating concentration is controlled to be 10-15% in the first-stage beating process.
And after the first pulp is pulped by the high-concentration pulping machine, the pulping degree is increased to 20-30 DEG SR, and the wet weight of the fiber is reduced to 8-10g, so that the paper formation uniformity is improved. And adding water into the pulp to obtain second pulp with the pulping concentration of 2-3%.
Wherein the beating degree is also called beating degree. The degree of the water filtration speed of the pulp is shown when the stock solution for papermaking is made on a copper wire, and the degree is one of indexes for measuring the quality of the paper pulp. The wet weight is an index indirectly indicating the average length of the fibers, and the smaller the wet weight is, the smaller the average length of the fibers is, and the larger the wet weight is, the longer the average length of the fibers is.
Step S24: and (3) devillicating and brooming the second pulp by using a double-disc refiner to obtain the original pulp with the beating degree of 35-50 DEG SR and the wet weight of the fiber of 2-4 g.
And after the second pulp is devillicate and broomed by using a double-disc refiner, the beating degree of the second pulp is increased to 35-50 DEG SR, and the wet weight of the fiber is reduced to 2-4g, so that the original pulp is obtained, and the paper forming strength is ensured.
Therefore, in step S11, the first beating is used to improve the uniformity of the finished paper, and the second beating is used to ensure the strength of the finished paper, so as to obtain the raw pulp with uniform mixing and higher strength of the finished paper.
Step S12: and adding filler, cationic starch, wet strength agent, internal sizing agent, slurry water-resisting agent and retention aid into the raw pulp liquid to obtain papermaking stock solution.
Wherein the addition amount of the filler is 50-200 kg/ton pulp, the addition amount of the cationic starch is 5-10 kg/ton pulp, the addition amount of the wet strength agent is not more than 30 kg/ton pulp, namely 0-30 kg/ton pulp, the addition amount of the sizing agent in the pulp is 5-10 kg/ton pulp, the addition amount of the pulp water-resisting agent is 5-20 kg/ton pulp, and the addition amount of the retention aid is 0.5-5 kg/ton pulp. The step is used for mixing the original pulp to facilitate the pulp to form paper.
Wherein, the filler, the cationic starch, the wet strength agent, the internal sizing agent, the water repellent agent and the retention aid are added into the original slurry in sequence.
Referring to fig. 3, fig. 3 is a flowchart illustrating an embodiment of step S12 in fig. 1. As shown in fig. 3, step S12 includes:
step S31: adding 50-200 kg/ton pulp filler, 5-10 kg/ton pulp cationic starch and 0-30 kg/ton pulp wet strength agent into the raw pulp by using a pulp preparation pool, and uniformly mixing;
step S32: adding 5-10 kg/ton pulp internal sizing agent, 5-20 kg/ton pulp water-resisting agent and 0.5-5 kg/ton pulp retention aid into the uniformly mixed original pulp, and uniformly mixing to obtain paper making stock solution with pulp concentration of 1.0-1.5%.
Specifically, firstly adding 50-200 kg/ton pulp filler, 5-10 kg/ton pulp cationic starch and 0-30 kg/ton pulp wet strength agent into raw pulp liquid and uniformly mixing; then adding 5-10 kg/ton pulp internal sizing agent and 5-20 kg/ton pulp water repellent agent into the pulp, mixing uniformly, and pumping into a pulp front tank, wherein the pulp front tank is a pulp tank at the front of paper machine manufacturing, also called a pulp tank, and the proportion and concentration of pulp fibers in the pulp front tank are quite stable and meet the paper manufacturing requirements. And adding retention aid of 0.5-5 kg/ton pulp to improve retention of fiber and fine material in the wire section of the paper machine. Wherein, the addition of 50-200 kg/ton pulp filler, 5-10 kg/ton pulp cationic starch, 0-30 kg/ton pulp wet strength agent, 5-10 kg/ton pulp sizing agent and 5-20 kg/ton pulp water resisting agent is carried out in a proportioning tank. 0.5-5 kg/ton pulp retention aid is added in the fore-papermaking pond.
Wherein the filler is one or more of talcum powder, kaolin, calcium silicate, bentonite, silica-alumina powder, zeolite powder, light calcium carbonate (PCC) and Ground Calcium Carbonate (GCC).
The internal sizing agent is one or more of Alkyl Ketene Dimer (AKD), Alkenyl Succinic Anhydride (ASA) and neutral rosin size. Wherein the internal sizing agent is different from the surface sizing agent.
The slurry water repellent agent is one or a combination of more of cationic wax emulsion, aluminum sulfate, polycyanum amine glyoxal resin, melamine formaldehyde resin and polyamide polyurea resin (PAPU). In this embodiment, the water-resisting agent of the sizing agent is used in combination with the sizing agent to improve the sizing degree and water resistance of the base paper.
Wherein the concentration of the pulp is controlled to be 1.0-1.5%. Pulp consistency refers to pulp consistency, which refers to the ratio of the weight of the oven dried pulp in the pulp to the weight of the total pulp, usually expressed as a percentage.
Step S13: and forming and drying the papermaking stock solution to obtain single-piece base paper.
Specifically, referring to fig. 4, fig. 4 is a schematic flowchart illustrating an embodiment of step S13 in fig. 1. As shown in fig. 4, step S13 includes:
step S41: the stock solution of the papermaking paper is processed by a wire part and a press part to obtain a wet paper web.
Wherein, the process of treating the stock solution of the papermaking by the wire part and the pressing part is the process of wire-laying papermaking, namely the process of papermaking to obtain the formed paper by the pulp.
Wherein, in the process of manufacturing paper by using the upper net, the pulp concentration is controlled between 1.0 and 1.5 percent to ensure the forming evenness of the paper.
Step S42: and drying the wet paper web by using a yankee large drying cylinder to obtain the single-ply base paper.
Wherein the smoothness of the single-smooth surface of the obtained single-gloss base paper is greater than or equal to 70s, namely not less than 70 s. Here, smoothness is a time required for passing a certain volume of air under a certain vacuum degree through a gap between the surface of a sample and a glass surface under a certain pressure, and is an index for evaluating the surface roughness characteristics of paper or paperboard.
Step S14: and carrying out sizing treatment on the surface of the single-colored base paper by using a surface sizing solution to obtain the thermal sublimation transfer paper.
The method comprises the steps of preparing a surface sizing solution before the step, and coating the surface sizing solution on the surface of single-base paper by using a sizing machine to obtain the thermal sublimation transfer paper with good transfer performance.
Wherein the process of preparing the surface sizing solution comprises the following steps: firstly, preparing a surface sizing agent in parts by weight: water repellent agent: the barrier agent is made of raw materials with the weight ratio of 100:5-10:10-15, and then the raw materials are uniformly mixed to obtain the surface sizing liquid. Specifically, the raw materials of the surface sizing liquid comprise 100g of the surface sizing agent, 5-10g of the water repellent agent and 10-15g of the blocking agent.
Wherein the surface sizing agent is one or more of polyvinyl alcohol (PVA), agar and fatty acid chloride complex salt. The water-resistant agent comprises one or more of a water-based silane coupling agent, isocyanate and polyamide polyepichlorohydrin resin (PPE), and the water-resistant agent for surface sizing has the functions of improving the water-resistant performance of the sized paper, improving the adaptability of the sized paper to the environmental humidity and preventing the problems of color difference and stripes of patterns, low ink transfer rate and the like caused by softening and wrinkling of the paper due to moisture during transfer printing. The barrier agent is one or a combination of more of acrylic resin, polymethyl silicone resin, polyethyl silicone resin, epoxy modified silicone resin and ethylene-vinyl acetate copolymer (EVA) resin, the barrier agent for surface sizing is used for blocking the absorption of the raw paper layer to the printing ink so as to improve the transfer rate of the printing ink, and meanwhile, the barrier agent can effectively improve the temperature resistance of the thermal sublimation transfer printing paper.
In this example, the solid content of the surface sizing solution was controlled to 5-15%, the viscosity was controlled to 10-15cps, and the temperature was controlled to 60 ℃. And then sizing the single-ply base paper.
Specifically, the surface sizing solution is sized to both surfaces of the base slip using a size press. Wherein, the sizing process adopts any one of film transfer type, roller type or dipping sizing.
Wherein the sizing amount of the front side of the single-light base paper is controlled to be 2-6g/m2The glue application amount of the reverse side is controlled to be 0.5-1.5g/m2. Wherein the front side is a side for transferring ink.
And (5) gluing the surface of the single-colored base paper to obtain the thermal sublimation transfer paper. The thermal sublimation transfer printing is a new process of printing the pictures and texts of the portrait, the landscape, the characters and the like on thermal sublimation transfer printing paper in a mirror image mode by using an ink-jet printer filled with thermal sublimation transfer printing ink, heating the pictures and texts to about 200 ℃ by using thermal transfer printing equipment, and sublimating and permeating the thermal transfer printing ink on the thermal sublimation transfer printing paper into a printing stock, thereby vividly transferring the color picture on the paper to the materials such as textiles, porcelain cups, porcelain plates, metals and the like. The front side of thermal sublimation transfer printing paper is used for bearing and transfering printing ink.
Step S14 further includes: and drying, press polishing and reeling the paper coated with the surface sizing solution to obtain the thermal sublimation transfer paper.
The application further provides a frame schematic diagram of a production process of thermal sublimation transfer paper, specifically please refer to fig. 5, and fig. 5 is a frame structure schematic diagram of an embodiment of the production process of thermal sublimation transfer paper. As shown in fig. 5: adding 0-20% of softwood pulp and 80-100% of hardwood pulp into a high-concentration pulping machine, and adding biological pulping enzyme to carry out pulping treatment in the first stage; then pumping the pulp into a double-disc pulp grinder to carry out second-stage pulping treatment to obtain original pulp; pumping the raw slurry into a slurry preparation pool, adding a filler, cationic starch, a wet strength agent, an internal sizing agent and a slurry water repellent agent into the slurry preparation pool, and uniformly mixing; pumping into a pre-papermaking pool, and adding a retention aid into the pre-papermaking pool for mixing; then, processing the raw paper by a head box, a net part, a pressing part and an MG drying cylinder to obtain single-light raw paper; sizing the single-ply base paper by a sizing machine; and then drying, calendaring and reeling to obtain the final thermal sublimation transfer printing paper.
The present application also provides four sets of comparative examples:
example 1:
mixing 10% softwood pulp and 90% hardwood pulp, adding 1 kg/ton pulp of biological pulping enzyme, pulping for two sections to obtain raw pulp with a pulping degree of 36 DEG SR and a fiber wet weight of 3g, and pumping the raw pulp into a pulp blending tank. Adding 100 kg/ton filler (50% PCC, 50% calcium silicate), 8 kg/ton pulp cationic starch and 15 kg/ton pulp wet strength agent into a pulp preparation tank, uniformly mixing, adding 8 kg/ton pulp internal sizing agent (AKD: 60% neutral rosin size: 40%), 10 kg/ton pulp polycyanatamine glyoxal resin, uniformly mixing, pumping into a pre-papermaking tank, and finally adding 2 kg/ton pulp retention aid into the pre-papermaking tank, wherein the concentration of the screened pulp is controlled to be 1.2%; and the dried product enters a sizing machine after passing through a pulp flowing box, a net part, a squeezing part and an MG drying cylinder. The surface sizing solution comprises, by weight, 40 parts of PVA, 60 parts of agar, 6 parts of an aqueous silane coupling agent and 12 parts of polymethyl silicone resin. The surface sizing liquid solid content is 6% and the viscosity is 10 cps. The front side of the sizing agent is controlled to be 3.2g/m by adopting film transfer type sizing20.7g/m on the reverse side2. Finally, the paper is obtained through drying, press polishing and reeling.
Example 2:
mixing 15% softwood pulp and 85% hardwood pulp, adding 1.2 kg/ton pulp biological pulping enzyme, pulping for two stages to obtain raw pulp with a pulping degree of 40 ° SR and a fiber wet weight of 2.2g, and pumping into a pulp preparation tank. Adding 150 kg/ton filler (30% PCC, 20% kaolin and 50% bentonite), 10 kg/ton pulp cationic starch and 20 kg/ton pulp wet strength agent into a pulp preparation tank, uniformly mixing, adding a sizing agent (100% neutral rosin size) and 15 kg/ton pulp cationic wax emulsion into 10 kg/ton pulp, uniformly mixing, pumping into a pre-papermaking tank, and finally adding 4 kg/ton pulp retention aid into the pre-papermaking tank, wherein the concentration of screened pulp is controlled to be 1.5%; and the dried product enters a sizing machine after passing through a pulp flowing box, a net part, a squeezing part and an MG drying cylinder. The surface sizing solution comprises 100 parts of PVA, 8 parts of PPE and 12 parts by weightAnd (3) EVA resin. The surface sizing liquid solid content is 8 percent, and the viscosity is 12 cps. The front side of the sizing agent is controlled to be 4.9g/m by adopting dipping type sizing21.1g/m on the back2. And finally, drying, calendaring and reeling to obtain finished paper.
Example 3:
20% softwood pulp and 80% hardwood pulp are mixed, biological pulping enzyme of 0.8 kg/ton pulp is added, raw pulp with the pulping degree of 42 DEG SR and the wet weight of fiber of 2.4g is obtained after two-stage pulping, and the raw pulp is pumped into a pulp blending pool. Adding 200 kg/ton filler (70% calcium silicate + 30% zeolite powder), 7 kg/ton slurry cationic starch and 13 kg/ton slurry wet strength agent into a slurry preparation tank, uniformly mixing, adding 5 kg/ton slurry internal sizing agent (100% AKD), 3 kg/ton slurry cationic wax emulsion and 4 kg/ton slurry PAPU, uniformly mixing, pumping into a pre-papermaking tank, and finally adding 5 kg/ton slurry retention aid into the pre-papermaking tank, wherein the concentration of the upper-wire slurry is controlled to be 1.3%; and the dried product enters a sizing machine after passing through a pulp flowing box, a net part, a pressing part and an MG drying cylinder. The surface sizing solution comprises, by weight, 30 parts of PVA, 70 parts of stearic acid chlorinated complex salt, 6 parts of PPE and 13 parts of polyethyl silicone resin. The surface sizing liquid solid content is 7% and the viscosity is 11 cps. The front side of the sizing agent is controlled to be 2.8g/m by adopting roller sizing20.5g/m on the back side2. And finally, drying, calendaring and reeling to obtain finished paper.
Example 4:
6 percent of softwood pulp and 94 percent of hardwood pulp are mixed, biological pulping enzyme of 0.6 kg/ton pulp is added, raw pulp with the pulping degree of 38 DEG SR and the wet weight of fiber of 3.5g is obtained after two-stage pulping, and the raw pulp is pumped into a pulp preparation pool. Adding 100 kg/ton filler (45% GCC, 35% kaolin, 20% bentonite), 5 kg/ton pulp cationic starch and 25 kg/ton pulp wet strength agent into a pulp preparation tank, uniformly mixing, adding a sizing agent (ASA: 35% of neutral rosin size: 65%), 4 kg/ton pulp cationic wax emulsion and 2 kg/ton pulp aluminum sulfate into 6 kg/ton pulp, uniformly mixing, pumping into a pre-papermaking tank, finally adding 1.5 kg/ton pulp retention aid into the pre-papermaking tank, and controlling the concentration of screened pulp to be 1.4%; and the dried product enters a sizing machine after passing through a pulp flowing box, a net part, a pressing part and an MG drying cylinder. The surface sizing solution comprises, by weight, 50 parts of agar, 50 parts of stearic acid chlorinated complex salt, 8 parts of isocyanate,11 parts of acrylic resin. The surface sizing liquid solid content is 12% and the viscosity is 14 cps. The front side of the sizing agent is controlled to be 4.6g/m by adopting film transfer type sizing21.3g/m on the reverse side2. And finally, drying, calendaring and reeling to obtain finished paper.
The paper obtained in the above examples was subjected to drying time test, transfer rate test and transfer clarity test with an overcoat paper and a non-coated base paper, and the test results are shown in the following table:
the drying time refers to the drying time of the printing ink on the surface of the printed paper pattern, timing is started after the printing is finished, timing is stopped by taking the color blocks not to be stained with filter paper, and the time is the drying time. The transfer rate refers to the transfer rate of the color patches before and after transfer. The present invention utilizes the Alice color densitometer to test the color density values of the same color block, paper and printed material after transfer printing, and the calculation formula of the transfer rate of the same color block is the transfer rate which is the color density of the printed matter/(the color density of the printed matter + the color density of the paper after transfer printing). And the transfer rate of the final thermal sublimation transfer paper is the average value of the transfer rates of cyan, magenta, yellow and black.
The transfer effect of the paper obtained in the embodiment 2 is compared with that of the outer coating paper and the non-coating base paper, and as can be seen from a color transfer effect graph, the picture transferred by the outer coating paper has bright color and clear picture; the picture transferred by the non-coated base paper has poor color and poor picture definition; the picture of thermal sublimation transfer printing paper rendition in this application, color and definition are close with the picture after the outer coating paper rendition.
Therefore, it can be seen from the above experimental results that: compared with externally coated paper, the transfer rate of the uncoated dry thermal sublimation transfer paper produced by the method is slightly lower than about 7%, but the drying speed of the printing ink is greatly improved, the drying time is also reduced to 5-10s from 65s, the picture after transfer printing is clear and complete, the transfer printing effect is close to that of the externally coated paper, and the production requirement of a high-speed ink-jet printer can be met. Simultaneously, the coating process has been saved in thermal sublimation transfer printing paper production process, has reduced material consumption such as coating equipment, manual work, water and electricity vapour and the carbon emission of paper production, effectively saves and reduces the cost, and then promotes profit margin and price advantage. Compare with non-coating body paper, the thermal sublimation of this application production changes printing paper when keeping better drying speed, and the transfer rate promotes to about 67% by 56% by a wide margin, and it has obvious improvement to print the effect than non-coating body paper.
The beneficial effect of this embodiment is: pulping bleached sulfate hardwood pulp or a mixed pulp of the bleached sulfate hardwood pulp and bleached sulfate softwood pulp by using a biological pulping enzyme to obtain a raw pulp; adding filler, cationic starch, wet strength agent, internal sizing agent, pulp water-resisting agent and retention aid into the raw pulp liquid to obtain papermaking stock solution; drying the papermaking stock solution to obtain single-light base paper; and (3) carrying out sizing treatment on the surface of the single-ply base paper by using a surface sizing solution to obtain the thermal sublimation transfer paper. By designing the raw paper production process, the raw paper surface treatment process is developed, the surface of the raw paper is treated by directly utilizing the sizing press, the external coating process of a raw paper machine is omitted, the drying speed of the printing ink is improved, and meanwhile, the high printing ink transfer rate of the thermal sublimation paper is ensured, so that the problems of long printing ink drying time, high cost and the like of the external coating paper are solved, and the problems of low printing ink transfer rate, unclear transfer printing and the like of non-coating paper are solved.
The present application further provides thermal sublimation transfer printing paper, please refer to fig. 6 specifically, fig. 6 is a schematic structural diagram of an embodiment of the thermal sublimation transfer printing paper of the present application. As shown in fig. 6, the thermal sublimation transfer paper 60 includes: a single base paper 61 and a surface size coating 62 covering the surface of the single base paper 61. Specifically, the surface sizing solution coatings 62 are covered on two opposite side surfaces of the single base paper 61, wherein the covering amount of the two side surfaces of the single base paper 61 is different, and the covering amount of the surface sizing solution coating 62 on one side is 2-6g/m2The covering amount of the other surface is 0.5-1.5g/m2。
The single base paper 61 is a single base paper which has not been subjected to drying, calendering, and winding.
The surface size coating 62 is a coating formed by drying the surface size.
The above description is only an embodiment of the present application, and is not intended to limit the scope of the present application, and all equivalent structures or equivalent processes performed by the present application and the contents of the attached drawings, which are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (10)
1. A production process of thermal sublimation transfer printing paper is characterized by comprising the following steps:
pulping bleached sulfate hardwood pulp or a mixed pulp of the bleached sulfate hardwood pulp and bleached sulfate softwood pulp by using a biological pulping enzyme to obtain a raw pulp;
adding a filler, cationic starch, a wet strength agent, an internal sizing agent, a pulp water repellent agent and a retention aid into the raw pulp liquid to obtain a papermaking stock solution;
forming and drying the papermaking stock solution to obtain single-light base paper;
and carrying out sizing treatment on the surface of the single-colored base paper by using a surface sizing solution to obtain the thermal sublimation transfer paper.
2. The process for producing thermal sublimation transfer paper according to claim 1, wherein the step of beating the bleached kraft hardwood pulp or the mixed pulp of the bleached kraft hardwood pulp and the bleached kraft softwood pulp with a biological beating enzyme to obtain a raw pulp includes:
mixing the bleached sulfate softwood pulp with the mass fraction not higher than 20% and the bleached sulfate hardwood pulp with the mass fraction not lower than 80% to obtain pulp;
adding 0.5-1.5 kg/ton pulp of the biological pulping enzyme into the pulp to obtain first pulp with the pulping concentration of 10% -15%;
pulping the first pulp by using a high-concentration pulping machine to obtain second pulp with the pulping degree of 20-30 DEG SR, the wet weight of the fiber of 8-10g and the pulping concentration of 2-3%;
and devillicating and brooming the second pulp by using a double-disc refiner to obtain the original pulp with the beating degree of 35-50 DEG SR and the wet weight of the fiber of 2-4 g.
3. The process for producing thermal sublimation transfer paper according to claim 1, wherein the step of adding a filler, cationic starch, a wet strength agent, an internal size agent, a pulp water repellent agent, and a retention aid to the stock solution to obtain a papermaking stock solution comprises:
adding 50-200 kg/ton pulp of the filler, 5-10 kg/ton pulp of the cationic starch and no more than 30 kg/ton pulp of the wet strength agent to the raw pulp liquid by using a pulp proportioning pool, and uniformly mixing;
adding 5-10 kg/ton pulp internal sizing agent, 5-20 kg/ton pulp water-resisting agent and 0.5-5 kg/ton pulp retention aid into the uniformly mixed stock solution, and uniformly mixing to obtain the papermaking stock solution with the pulp concentration of 1.0-1.5%.
4. The production process of the thermal sublimation transfer paper according to claim 1, wherein the step of forming and drying the papermaking stock solution to obtain the single-ply base paper comprises the following steps:
processing the papermaking stock solution by a wire part and a pressing part to obtain a wet paper web;
and drying the wet paper web by using a yankee large drying cylinder to obtain the single-ply base paper.
5. The process for producing thermal sublimation transfer paper according to claim 4, wherein the smoothness of the plain surface of the single base paper is not less than 70 s.
6. The process for producing thermal sublimation transfer paper according to claim 1, wherein the step of sizing the surface of the single base paper with a surface sizing solution to obtain the thermal sublimation transfer paper further comprises:
preparing the surface sizing solution by using a surface sizing agent, a water repellent agent and a blocking agent;
wherein the surface sizing agent comprises the following components in parts by weight: the water repellent agent: the barrier agent is 100:5-10: 10-15.
7. The production process of the thermal sublimation transfer printing paper according to claim 6, wherein the surface sizing agent is one or more of polyvinyl alcohol, agar, and a complex salt of a fatty acid chloride; wherein the solid content of the surface sizing liquid is 5-15%, the viscosity is 10-15cps, and the temperature is 60 ℃.
8. The production process of the thermal sublimation transfer paper according to claim 1, wherein the step of sizing the surface of the single base paper with the surface sizing solution to obtain the thermal sublimation transfer paper comprises:
sizing the surface sizing solution to the surface of the single-ply base paper by using a sizing machine;
wherein, the sizing process adopts any one of film transfer type, roller type or dipping sizing.
9. The process for the production of thermal sublimation transfer paper according to claim 8,
the front sizing amount of the single-ply base paper is controlled to be 2-6g/m2The reverse side sizing amount of the single-ply base paper is controlled to be 0.5-1.5g/m2。
10. The thermal sublimation transfer paper is characterized by comprising single-face base paper and a surface sizing solution coating covering the surface of the single-face base paper; the covering amount of the surface sizing solution coating on one side of the single-sided base paper is 2-6g/m2The covering amount of the other surface is 0.5-1.5g/m2。
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