CN109518515B - Beating and stirring device for baking base paper - Google Patents
Beating and stirring device for baking base paper Download PDFInfo
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- CN109518515B CN109518515B CN201910052543.0A CN201910052543A CN109518515B CN 109518515 B CN109518515 B CN 109518515B CN 201910052543 A CN201910052543 A CN 201910052543A CN 109518515 B CN109518515 B CN 109518515B
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- 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
- D21F11/02—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/34—Kneading or mixing; Pulpers
- D21B1/342—Mixing apparatus
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/34—Kneading or mixing; Pulpers
- D21B1/345—Pulpers
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- 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
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/02—Chemical or chemomechanical or chemothermomechanical 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
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- 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
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/36—Polyalkenyalcohols; Polyalkenylethers; Polyalkenylesters
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- 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
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- 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
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
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Abstract
The invention discloses a beating and stirring device for baking base paper, which effectively improves paper papaw paper diseases, has high compactness, good strength, good dimensional stability, high transparency, flat and smooth surface and small absorptivity, effectively reduces the dosage of a stripping agent in subsequent processing, can improve beating quality and prompt the physical performance of the base paper, and can omit a pulping tank, thereby fundamentally avoiding the loss of pulp in the process from the pulping tank to a pulp mixing tank and saving cost.
Description
Technical Field
The invention relates to the technical field of special paper, in particular to a pulping and stirring device for baking base paper.
Background
Baking paper is commonly called silicone oil paper and is widely applied to food baking, food roasting, food microwave, food packaging and the like. The baking paper is prepared by surface sizing or coating a stripping agent on baking base paper, and is low in cost and environment-friendly. With the improvement of living standard of substances, the self-care consciousness and environmental protection consciousness of people are continuously enhanced, and meanwhile, the development of the baking industry also leads the demand of baking paper to rise.
The production technology of baking base paper starts earlier abroad, and the research on the technology is less at home. The quality of the baking base paper directly determines the quality of the baking paper, in order to reduce the permeation of the stripping agent in the subsequent processing process, the baking base paper needs to have higher tightness, the beating degree of the sizing agent is generally higher, the drying of the paper is not uniform, the seersucker appears, the dosage of the stripping agent in the subsequent processing is increased, the cost is increased, the distribution of the stripping agent is not uniform, the food and the baking paper can not be completely stripped, the aesthetic feeling is influenced, and in addition, the problems of potential safety hazard, difficult degradation, environmental pollution and the like exist when the stripping agent is excessively used. For this purpose, we propose a beating and stirring device for baking base paper.
Disclosure of Invention
The invention aims to provide a beating and stirring device for baking base paper, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of baking base paper comprises the following steps: step 1, crushing: the method comprises the following steps of (1) crushing bleached softwood pulp and hardwood pulp into a pulp liquid with the concentration of 3-5% in a crushed decomposition machine added with CaCO3 filler, wherein the proportion of the bleached softwood pulp to the hardwood pulp is 1: 2-1: 4, and the adding amount of the CaCO3 filler is 5-10% of the total mass of absolute dry pulp; step 2, devillicating and brooming: treating the pulp liquid prepared in the step 1 by a pulping device to separate wood pulp fibers, controlling the pulp degree of the pulp liquid after pulping to be 25-30 DEG SR, and controlling the wet weight of the fibers to be 2.0-3.0 g; step 3, stirring: adding a reinforcing aid into the pulped pulp liquor, wherein the adding amount of the reinforcing aid is 0.2-2.0% of the total mass of the absolute dry pulp, the reinforcing aid is a PAE wet strength agent, the viscosity of the PAE wet strength agent is controlled to be 40-100 mpa.s at 25 ℃, and the PH value of the PAE wet strength agent is controlled to be 4-6 at 21 ℃; step 4, manufacturing paper: purifying the paper pulp stirred in the step 3, forming and drying in a multi-cylinder manner through a long net, coating a surface sizing agent in the middle drying period, and performing soft press finishing after the drying period to obtain semi-finished wallpaper, wherein the surface sizing agent is water-soluble special polyester emulsion and a softening agent according to the ratio of 50: 1-16: 1, mixing the two solutions according to a proportion to prepare a 9% solution, and using the two solutions together to further improve the strength and the softness of the paper; step 5, secondary application: conveying the manufactured semi-finished wallpaper base paper into a primary coating device through an automatic paper receiving and removing rack, coating a primary coating liquid on the semi-finished wallpaper base paper, controlling the solid content of the primary coating liquid to be 50-65%, conveying the primary coated wallpaper base paper into a first hot air drying box for drying, conveying the wallpaper base paper out of the first hot air drying box into a surface coating device, coating a surface coating liquid on the surface of the primary coating liquid, controlling the solid content of the surface coating liquid to be 50-65%, and conveying the surface-coated wallpaper into a second hot air drying box for drying; step 6, gum treatment: the coated wallpaper coming out of the second hot air drying box in the step 5 is sent into a gum device through a third traction roller for gum treatment, then is sent into a third hot air drying box for drying, gum liquid is formed by mixing and stirring 100 parts of water and 0.5 part of mildew preventive in a gum storage barrel, and mildew preventive liquid is coated on the back surface of the coated wallpaper to improve the mildew preventive performance of the coated wallpaper; and 7, post-treatment: and (3) conveying the coated wallpaper from the third hot air drying box in the step (6) into a state regulating cylinder to regulate the paper temperature, balancing the paper temperature, performing soft calendaring finishing, and then passing through a horizontal paper winder to obtain the matte pure paper wallpaper meeting the requirements, wherein the state regulating device comprises a steam drying cylinder and three jacket drying cylinders, the temperature of the steam drying cylinder is 90 ℃, the temperature of the jacket drying cylinders is 25 ℃, and the combination of the steam drying cylinder and the jacket drying cylinders is mainly used for regulating the paper temperature and improving the smoothness of the coated paper.
In the technical scheme, the CaCO3 filler is 70-grade light calcium carbonate, the content of CaCO3 is 97.7%, the whiteness is 94.1%, and the settlement degree is 77 grids/15 min.
In the technical scheme, the primer solution in the step 5 comprises, by mass, 70 parts of 95-grade aqueous heavy calcium, 30 parts of 90-grade light calcium, 0.3 part of a dispersing agent, 25 parts of an acrylic emulsion, 0.6 part of a water repellent agent, 0.08 part of a defoaming agent, 0.35 part of a bactericide, 0.1 part of caustic soda and 0.14-0.22 part of a thickening agent, wherein after 70 parts of 95-grade aqueous heavy calcium, 30 parts of 90-grade light calcium and 0.3 part of the dispersing agent are dispersed in a high-speed dispersion machine at 1500r/min for 30min, the rotating speed is adjusted to 800r/min, 25 parts of the acrylic emulsion, 0.6 part of a water repellent agent, 0.08 part of a defoaming agent, 0.35 part of a bactericide, 0.1 part of caustic soda and 0.14-0.22 part of a thickening agent are added, and then the mixture is dispersed for 20-25 min to prepare the primer solution with the solid content of 50-65% and the viscosity of 1000-1200 mpa.s, so that the primer solution can be used for priming the smoothness of the matte plain paper for the base paper of the matte plain paper wallpaper to improve the smoothness of the matte plain paper; the surface coating liquid comprises 50 parts by mass of 90-grade aqueous heavy calcium, 35 parts by mass of 90-grade aqueous light calcium, 15 parts by mass of china clay, 0.3 part by mass of a dispersing agent, 13 parts by mass of fumed silica, 25 parts by mass of acrylic emulsion, 0.6 part by mass of a water repellent agent, 0.08 part by mass of a defoaming agent, 0.35 part by mass of a bactericide, 0.1 part by mass of caustic soda and 0.14-0.22 part by mass of a thickener, wherein 50 parts by mass of 90-grade aqueous heavy calcium, 35 parts by mass of 90-grade aqueous light calcium, 15 parts by mass of china clay, 0.3 part by mass of a dispersing agent and 13 parts by mass of fumed silica are dispersed in a high-speed dispersion machine at 1500r/min for 30min and then the rotating speed is adjusted to 800r/min, 25 parts by mass of acrylic emulsion, 0.6 part by mass of a water repellent agent, 0.08 part by mass of a defoaming agent, 0.35 part by mass of a bactericide, 0.1 part by mass of caustic soda and 0.14-0.22 part by mass of a thickener, and then dispersed for 20-25 min to 25min, so that the solid content is 50-65%, and the surface coating liquid is prepared, and the surface of the surface coating liquid is used for matt plain paper of the matt plain paper of the surface wallpaper and the surface coating liquid with 1000-1200 mpa.s is suitable for printing, and reduce the gloss of the coated paper surface.
A beating and stirring device related to a preparation method of high-grade matt pure paper wallpaper comprises a shell, wherein a feeding pipe and a discharging pipe are respectively fixed at the top and the bottom of the shell, the feeding pipe and the discharging pipe are respectively communicated with the inside of the shell, a first filter plate and a second filter plate are fixed inside the shell, the first filter plate is positioned above the second filter plate, the first filter plate and the second filter plate divide the inside of the shell into three areas which are a first beating area, a second beating area and a stirring area respectively, a first pressure sensor is fixed at the top of the second filter plate, a beating device is fixed inside the first beating area, an ultrasonic wave generating device is arranged outside the second beating area, the ultrasonic wave generating device is fixed with the shell, a stirring device is fixed inside the stirring area, an auxiliary device is arranged outside the stirring area, and the auxiliary device is fixed with the shell, and a circulating mechanism is fixed on the outer side of the shell and is respectively communicated with the first pulping area, the second pulping area and the stirring area.
Among the above-mentioned technical scheme, agitating unit includes puddler, connecting axle, level sensor and drive shaft, the drive shaft runs through first filter plate and second filter plate, and rotates through bearing and first filter plate and second filter plate respectively and be connected, the connecting axle is vertical to be fixed in the bottom of drive shaft, the puddler is fixed in the outside of connecting axle, level sensor fixes on the connecting axle, and level sensor electric connection pulping device.
Among the above-mentioned technical scheme, the making beating device includes electric putter, seal shell, mounting panel, fixed axle, installation axle, making beating motor, connecting piece and making beating blade, electric putter fixes at the middle part at casing top, and electric putter's output is located the inside of casing, the top of seal shell is fixed with electric putter's output, making beating motor is located the inboard of seal shell, and making beating motor and seal shell all fix on the mounting panel, the output shaft of making beating motor passes mounting panel fixed axle fixed connection, the installation axle level sets up, and the middle part of installation axle is fixed with the fixed axle, making beating blade fixes the bottom at the installation axle, the connecting piece is fixed in the bottom of fixed axle.
Among the above-mentioned technical scheme, the edge of mounting panel top is fixed with a plurality of stiffeners to the angle such as, the top of casing is run through on the top of stiffener, and with the top sliding connection of casing.
Among the above-mentioned technical scheme, the connecting piece is equipped with a plurality ofly, and angular distribution such as a plurality of connecting pieces is in the bottom of fixed axle, the connecting piece includes buffer spring and buffering axle, the bottom of fixed axle is equipped with a plurality of recesses to the angle such as angle, buffer spring's top is fixed with the bottom of recess, and the bottom is fixed with the buffering axle, the inner wall sliding connection of buffering axle and recess, the top of drive shaft and the position that the buffering axle corresponds are equipped with the fan-shaped groove.
In the above technical scheme, the circulation mechanism includes a circulation tank with an inclined bottom, a first backflow pipe, a second backflow pipe, a third backflow pipe, a first backflow pump, a second backflow pump, a third filter plate, a first baffle, a second baffle and a second pressure sensor, the third filter plate is fixed on the inclined bottom inside the circulation tank, the third filter plate divides the inside of the circulation tank into two cavities, namely an upper circulation cavity and a lower circulation cavity, the input end and the output end of the first backflow pump are respectively communicated with the stirring area and the upper circulation cavity through the first backflow pipe, the input end and the output end of the second backflow pump are respectively communicated with the upper circulation cavity and the first beating area through the second backflow pipe, the end of the second backflow pipe close to the upper cavity is level with the top of the third filter plate, the two ends of the third backflow pipe are respectively communicated with the second beating area and the lower circulation cavity, the first baffle and the second baffle are fixed on the third filter plate, the height of the first baffle is larger than that of the second baffle, the second pressure sensor is located between the first baffle and the second baffle, and the second pressure sensor is fixed on the third filter plate.
In the technical scheme, the auxiliary mechanism comprises a beating degree measuring instrument and an auxiliary agent filling device, the output end of the beating degree measuring instrument is communicated with the second beating area, and the output end of the auxiliary agent filling device is communicated with the stirring area.
Compared with the prior art, the invention has the beneficial effects that:
by adopting the technical scheme, the prepared baking base paper effectively improves the papaw defects of paper, has high compactness, good strength, good dimensional stability, high transparency, flat and smooth surface and small absorptivity, effectively reduces the dosage of the stripping agent in subsequent processing, can improve the pulping quality and prompt the physical performance of the base paper by utilizing the device, can omit a pulping tank at the same time, fundamentally avoids the loss of the pulp in the process from the pulping tank to the pulp mixing tank, and saves the cost.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of a pulping device of the present invention;
FIG. 3 is a schematic structural view of a stirring device according to the present invention;
FIG. 4 is a schematic view of the structure of the circulating liquid phase tank of the present invention;
FIG. 5 is an enlarged view of area A in FIG. 2;
fig. 6 is an enlarged view of the region B in fig. 5.
In the figure: 1-a shell; 2-feeding pipe; 3, a discharge pipe; 4-a first filter plate; 5-a second filter plate; 6-a first pulping zone; 7-a second beating zone; 8-a stirring zone; 9-a first pressure sensor; 10-a pulping device; 11-an ultrasonic wave generating device; 12-a stirring device; 13-an auxiliary device; 14-a circulation mechanism; 15-a stirring rod; 16-a connecting shaft; 17-a liquid level sensor; 18-a drive shaft; 19-an electric push rod; 20-sealing the shell; 21-mounting a plate; 22-a fixed shaft; 23-mounting the shaft; 24-a pulping motor; 25-a connector; 26-beating blades; 27-a reinforcing bar; 28-a buffer spring; 29-a buffer shaft; 30-a groove; 31-a sector groove; 32-a circulating liquid tank; 33-a first return pipe; 34-a second return conduit; 35-a third return conduit; 36-a first reflux pump; 37-a second reflux pump; 38-third filter plate; 39-a first baffle; 40-a second baffle; 41-a second pressure sensor; 42-upper circulation chamber; 43-lower circulation chamber; 44-freeness measuring instrument; 45-auxiliary agent filling device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention is described in further detail below with reference to the drawings and the detailed description.
Example 1: the bleached softwood pulp and hardwood pulp with the proportion of 1:2 are crushed into paper pulp liquid with the concentration of 3 percent in a crushed crusher added with CaCO3 filler, the addition amount of the CaCO3 filler is 5 percent of the total mass of the oven-dry pulp, the CaCO3 filler is 70-grade light calcium carbonate, the content of the CaCO3 is 97.7 percent, the whiteness is 94.1 percent, and the settlement degree is 77 grains/15 min; carrying out pulping treatment on the prepared pulp liquid to divide the wood pulp fibers into filaments, controlling the pulp degree of the pulp liquid after the pulping treatment to be 25-degree SR, and controlling the wet weight of the fibers to be 2.0 g; adding 0.2 percent of PAE wet strength agent of the total mass of the absolute dry pulp into the pulp slurry after pulping treatment, controlling the viscosity of the PAE wet strength additive to be 40mpa.s at 25 ℃, and controlling the pH value to be 4 at 21 ℃; purifying the stirred paper pulp, forming and drying in a multi-cylinder manner through a long net, and coating water-soluble special polyester emulsion and a softening agent according to the ratio of 50: 1 to prepare a solution with the concentration of 9 percent, and after drying, carrying out soft press finishing to obtain semi-finished wallpaper; sending the manufactured semi-finished wallpaper base paper into a primary coating device through an automatic paper receiving and withdrawing rack, coating primary coating liquid on the semi-finished wallpaper base paper, dispersing 70 parts of 95-grade water-based heavy calcium, 30 parts of 90-grade light calcium and 0.3 part of dispersing agent in a high-speed dispersion machine in 1500r/min for 30min, adjusting the rotating speed to 800r/min, adding 25 parts of acrylic emulsion, 0.6 part of water repellent, 0.08 part of defoaming agent, 0.35 part of bactericide, 0.1 part of caustic soda and 0.14 part of thickening agent, dispersing for 20min to prepare primary coating liquid with the solid content of 50% and the viscosity of 1000mpa.s, sending the primary wallpaper base paper after primary coating into a first hot air drying box for drying, sending the primary wallpaper base paper from the first hot air drying box into a surface coating device, coating liquid on the surface of the primary coating liquid, sending the wallpaper after surface coating into a second hot air drying box for drying, and sending 50 parts of 90-grade water-based heavy calcium, 35 parts of 90-grade water-based light calcium, 35 parts, 90-grade light calcium and 0.3 part of dispersant, 15 parts of porcelain clay, 0.3 part of dispersing agent and 13 parts of fumed silica are dispersed in a high-speed dispersion machine at 1500r/min for 30min, then the rotating speed is adjusted to 800r/min, and then 25 parts of acrylic emulsion, 0.6 part of water repellent agent, 0.08 part of defoaming agent, 0.35 part of bactericide, 0.1 part of caustic soda and 0.14 part of thickening agent are added and dispersed for 20min to prepare a surface coating liquid with 50% of solid content and 1000mpa.s of viscosity; conveying the coated wallpaper from the second hot air drying oven into a gum device through a third traction roller for gum treatment, mixing and stirring gum liquid in a gum storage barrel by 100 parts of water and 0.5 part of mildew preventive, and then conveying the gum liquid into a third hot air drying oven for drying; and feeding the coated wallpaper from the third hot air drying box into a state regulating cylinder for paper temperature regulation, balancing the paper temperature, performing soft press polishing and finishing, and then performing horizontal paper rolling to obtain the matte pure paper wallpaper meeting the requirements.
Example 2:
the bleached softwood pulp and hardwood pulp with the proportion of 1:3 are crushed into pulp liquid with the concentration of 4 percent in a crushed crusher added with CaCO3 filler, the addition amount of the CaCO3 filler is 7 percent of the total mass of the oven dry pulp, the CaCO3 filler is 70-grade light calcium carbonate, the content of the CaCO3 is 97.7 percent, the whiteness is 95 percent, and the settlement degree is 77 grids/15 min; carrying out pulping treatment on the prepared pulp liquid to divide the wood pulp fibers into filaments, controlling the pulp degree of the pulp liquid after the pulping treatment to be 27 DEG SR, and controlling the wet weight of the fibers to be 2.5 g; adding 1.0 percent of PAE wet strength agent of the total mass of the absolute dry pulp into the pulp slurry after pulping treatment, controlling the viscosity of the PAE wet strength additive to be 60mpa.s at 25 ℃, and controlling the pH value to be 5 at 21 ℃; purifying the stirred paper pulp, forming and drying in a multi-cylinder manner through a long net, and coating water-soluble special polyester emulsion and a softening agent in the middle stage of drying according to the weight ratio of 35: 1 to prepare a solution with the concentration of 9 percent, and after drying, carrying out soft press finishing to obtain semi-finished wallpaper; sending the manufactured semi-finished wallpaper base paper into a primary coating device through an automatic paper receiving and withdrawing rack, coating primary coating liquid on the semi-finished wallpaper base paper, dispersing 70 parts of 95-grade water-based heavy calcium, 30 parts of 90-grade light calcium and 0.3 part of dispersing agent in a high-speed dispersion machine in 1500r/min for 30min, adjusting the rotating speed to 800r/min, adding 25 parts of acrylic emulsion, 0.6 part of water repellent, 0.08 part of defoaming agent, 0.35 part of bactericide, 0.1 part of caustic soda and 0.14 part of thickening agent, dispersing for 20min to prepare primary coating liquid with the solid content of 58% and 1100mpa.s, sending the primary wallpaper base paper after primary coating into a first hot air drying box for drying, sending the primary wallpaper base paper from the first hot air drying box into a surface coating device, coating liquid on the surface of the primary coating liquid, sending the wallpaper after surface coating into a second hot air drying box for drying, and sending 50 parts of 90-grade water-based heavy calcium, 35 parts of 90-grade water-based light calcium, 35 parts, 90-grade light calcium and 0.3 part of thickener into a second hot air drying box for drying, 15 parts of porcelain clay, 0.3 part of dispersing agent and 13 parts of fumed silica are dispersed in a high-speed dispersion machine at 1500r/min for 30min, then the rotating speed is adjusted to 800r/min, and then 25 parts of acrylic emulsion, 0.6 part of water repellent agent, 0.08 part of defoaming agent, 0.35 part of bactericide, 0.1 part of caustic soda and 0.19 part of thickening agent are added and dispersed for 20min to prepare a surface coating liquid with the solid content of 58% and the viscosity of 1100 mpa.s; conveying the coated wallpaper from the second hot air drying oven into a gum device through a third traction roller for gum treatment, mixing and stirring gum liquid in a gum storage barrel by 100 parts of water and 0.5 part of mildew preventive, and then conveying the gum liquid into a third hot air drying oven for drying; and feeding the coated wallpaper from the third hot air drying box into a state regulating cylinder for paper temperature regulation, balancing the paper temperature, performing soft press polishing and finishing, and then performing horizontal paper rolling to obtain the matte pure paper wallpaper meeting the requirements.
Example 3:
the bleached softwood pulp and hardwood pulp with the proportion of 1:4 are crushed into pulp liquid with the concentration of 4 percent in a crushed crusher added with CaCO3 filler, the addition amount of the CaCO3 filler is 10 percent of the total mass of oven dry pulp, the CaCO3 filler is 70-grade light calcium carbonate, the content of CaCO3 is 97.7 percent, the whiteness is 95 percent, and the settlement degree is 77 grids/15 min; carrying out pulping treatment on the prepared pulp liquid to divide the wood pulp fibers into filaments, controlling the pulp degree of the pulp liquid after the pulping treatment to be 30-degree SR, and controlling the wet weight of the fibers to be 3.0 g; adding a PAE wet strength agent accounting for 2.0 percent of the total mass of the absolute dry pulp into the pulp slurry after pulping treatment, and controlling the viscosity of the PAE wet strength additive to be 100mpa.s at 25 ℃ and the PH value to be 6 at 21 ℃; purifying the stirred paper pulp, forming and drying in a multi-cylinder manner through a long net, and coating water-soluble special polyester emulsion and a softening agent according to the weight ratio of 16: 1 to prepare a solution with the concentration of 9 percent, and after drying, carrying out soft press finishing to obtain semi-finished wallpaper; sending the manufactured semi-finished wallpaper base paper into a primary coating device through an automatic paper receiving and withdrawing rack, coating primary coating liquid on the semi-finished wallpaper base paper, dispersing 70 parts of 95-grade water-based heavy calcium, 30 parts of 90-grade light calcium and 0.3 part of dispersing agent in a high-speed dispersion machine in 1500r/min for 30min, adjusting the rotating speed to 800r/min, adding 25 parts of acrylic emulsion, 0.6 part of water repellent, 0.08 part of defoaming agent, 0.35 part of bactericide, 0.1 part of caustic soda and 0.22 part of thickening agent, dispersing for 20min to prepare primary coating liquid with the solid content of 65% and 1200mpa.s, sending the primary wallpaper base paper after primary coating into a first hot air drying box for drying, sending the primary wallpaper base paper from the first hot air drying box into a surface coating device, coating liquid on the surface of the primary coating liquid, sending the wallpaper base wallpaper after surface coating into a second hot air drying box for drying, and sending 50 parts of 90-grade water-based heavy calcium, 35 parts of 90-grade water-based light calcium, 35 parts, 90-grade light calcium and 0.3 part of dispersant, 15 parts of porcelain clay, 0.3 part of dispersing agent and 13 parts of fumed silica are dispersed in a high-speed dispersion machine at 1500r/min for 30min, then the rotating speed is adjusted to 800r/min, and then 25 parts of acrylic emulsion, 0.6 part of water repellent agent, 0.08 part of defoaming agent, 0.35 part of bactericide, 0.1 part of caustic soda and 0.22 part of thickening agent are added and dispersed for 20min to prepare a surface coating liquid with the solid content of 65% and the viscosity of 1200 mpa.s; conveying the coated wallpaper from the second hot air drying oven into a gum device through a third traction roller for gum treatment, mixing and stirring gum liquid in a gum storage barrel by 100 parts of water and 0.5 part of mildew preventive, and then conveying the gum liquid into a third hot air drying oven for drying; and feeding the coated wallpaper from the third hot air drying box into a state regulating cylinder for paper temperature regulation, balancing the paper temperature, performing soft press polishing and finishing, and then performing horizontal paper rolling to obtain the matte pure paper wallpaper meeting the requirements. The physical properties of the self-adhesive medical paper prepared in the above examples were measured as follows:
| physical index | Unit of | Example 1 | Example 2 | Example 3 |
| Quantification of | g/m2 | 173.9 | 175.2 | 176.1 |
| Thickness of | % | 0.19 | 0.23 | 0.25 |
| Tear strength | mN | 1233 | 1238 | 1240 |
| Longitudinal tensile force | N | 5.2 | 5.5 | 5.6 |
| Wet tensile strength | KN/m | 1.3 | 1.5 | 1.55 |
| Water absorption | g/m2 | 37.5 | 38.5 | 39.2 |
| Transverse expansion ratio | % | 1.34 | 1.38 | 1.41 |
| Smoothness of the surface | S | 80 | 82 | 83 |
| Degree of gloss | % | 5.1 | 5.3 | 5.4 |
The above embodiment shows that the matte pure paper wallpaper prepared by the method solves the problem of light reflection caused by overhigh glossiness of the coated wallpaper commonly existing in the current market, has the advantages of low surface glossiness, good fineness, excellent strength, good softness, full printing color and strong third dimension, can meet the paper requirements of the paper industry at the present, and has good market prospect
The principle of the structure is as follows: the pulp enters a first pulping area 6 from a feeding pipe 2, at the moment, a fixed shaft 22 and a driving shaft 18 are in a separated state, high-speed rotation of a pulping blade 26 can be achieved through rotation of an output shaft of a pulping motor 24, pulping processing is carried out on the pulp in the first pulping area 6 by the pulping blade 26, a relatively thin part of the pulp can enter a second pulping area 7 along with pulping, when the pressure of a first pressure sensor 9 in the second pulping area 7 reaches a specified pressure, an ultrasonic generating device 11 is started, the pulp in the second pulping area 7 is subjected to ultrasonic pulping, a part of the pulp enters a stirring area 8, meanwhile, after a liquid level sensor 17 on a connecting shaft 16 detects that the liquid level reaches a specified position, an output end of an electric push rod 19 extends out, the fixed shaft 22 drives a buffer shaft 29 to move downwards, the buffer shaft 29 is clamped in a fan-shaped groove 31, and then the pulping motor 24 can drive the fixed shaft 22 and the connecting shaft 16 to rotate simultaneously, the stirring in the stirring area 8 is realized, if the requirement on the beating degree is high, or when the beating degree measuring instrument 44 detects that the size is not in accordance with the requirement, the secondary mechanical beating is carried out after the secondary recovery of the size through the circulating mechanism 14, the size is sucked into the circulating liquid tank 32 through the first return pipe 33 by the first return pipe 36, along with the gradual accumulation of the sucked size, the upper surface of the third filter plate 38 in the circulating liquid tank 32 is vertically provided with a first baffle 39 and a second baffle 40 for preventing the excessive sedimentation impact force of the size sucked by the first return pipe 33 from influencing the sedimentation of the size, the size overflows from the first baffle 39 into the cavity between the first baffle 39 and the second baffle 40, through the sedimentation, the fine and smooth part of the upper layer tissue of the size in the cavity overflows to the other side through the second baffle 40, is filtered into the lower circulating cavity 43 through the third filter plate 38, and a part of the lower layer of the size is directly filtered into the lower circulating cavity 43 through the third filter plate 38, the inlet part of the third return pipe 35 is higher than the outlet part of the third return pipe 35, therefore, the grout with fine tissues flows back to the second pulping area 7 through the third return pipe 35 under the action of gravity, meanwhile, the grout with coarse tissues is gradually accumulated in the upper circulating cavity 42, when the grout reaches a certain amount, the second pressure sensor 41 arranged in the cavity is connected with the control circuit of the second return pump 37 for controlling the second return pipe 34 to work, and the second return pipe 34 sucks the coarse grout accumulated in the cavity back to the first pulping area 6 through the second return pump 37, so that the secondary pulping process is realized.
The single mechanical beating makes the fiber subject to friction and shearing action, the outer layer part of the primary wall and the secondary wall of the fiber is broken, the middle fine fiber absorbs water to swell and divides the silk to brook, but the mechanical beating degree is improved quickly, and the fiber is cut off and broken seriously.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a bake making beating agitating unit of body paper, includes casing (1), its characterized in that: the top and the bottom of the shell (1) are respectively fixed with a feeding pipe (2) and a discharging pipe (3), the feeding pipe (2) and the discharging pipe (3) are respectively communicated with the inside of the shell (1), the inside of the shell (1) is fixed with a first filter plate (4) and a second filter plate (5), the first filter plate (4) is positioned above the second filter plate (5), the first filter plate (4) and the second filter plate (5) separate the inside of the shell (1) into three areas which are a first pulping area (6), a second pulping area (7) and a stirring area (8), the top of the second filter plate (5) is fixed with a first pressure sensor (9), the inside of the first pulping area (6) is fixed with a pulping device (10), the outside of the second pulping area (7) is provided with an ultrasonic generating device (11), and the ultrasonic generating device (11) is fixed with the shell (1), a stirring device (12) is fixed in the stirring area (8), an auxiliary device (13) is arranged on the outer side of the stirring area (8), the auxiliary device (13) is fixed with the shell (1), a circulating mechanism (14) is fixed on the outer side of the shell (1), and the circulating mechanism (14) is respectively communicated with the first pulping area (6), the second pulping area (7) and the stirring area (8);
the stirring device (12) comprises a stirring rod (15), a connecting shaft (16), a liquid level sensor (17) and a driving shaft (18), the driving shaft (18) penetrates through the first filter plate (4) and the second filter plate (5) and is respectively in rotating connection with the first filter plate (4) and the second filter plate (5) through bearings, the connecting shaft (16) is vertically fixed at the bottom end of the driving shaft (18), the stirring rod (15) is fixed on the outer side of the connecting shaft (16), the liquid level sensor (17) is fixed on the connecting shaft (16), and the liquid level sensor (17) is electrically connected with the pulping device (10);
the pulping device (10) comprises an electric push rod (19), a sealing shell (20), a mounting plate (21), a fixing shaft (22), a mounting shaft (23), a pulping motor (24), a connecting piece (25) and a pulping blade (26), wherein the electric push rod (19) is fixed in the middle of the top of the shell (1), the output end of the electric push rod (19) is positioned in the shell (1), the top of the sealing shell (20) is fixed with the output end of the electric push rod (19), the pulping motor (24) is positioned on the inner side of the sealing shell (20), the pulping motor (24) and the sealing shell (20) are both fixed on the mounting plate (21), the output shaft of the pulping motor (24) penetrates through the mounting plate (21) and is fixedly connected with the fixing shaft (22), the mounting shaft (23) is horizontally arranged, the middle of the mounting shaft (23) is fixed with the fixing shaft (22), and the pulping blade (26) is fixed at the bottom of the mounting shaft (23), the connecting piece (25) is fixed at the bottom end of the fixed shaft (22).
2. The beating and stirring device for baking base paper according to claim 1, characterized in that: the edge at mounting panel (21) top is fixed with a plurality of stiffeners (27) with the angle such as, the top of casing (1) is run through on the top of stiffener (27), and with the top sliding connection of casing (1).
3. The beating and stirring device for baking base paper according to claim 2, characterized in that: connecting piece (25) are equipped with a plurality ofly, and angular distribution such as a plurality of connecting pieces (25) is in the bottom of fixed axle (22), connecting piece (25) are including buffer spring (28) and buffering axle (29), the bottom of fixed axle (22) is equiangular and is equipped with a plurality of recesses (30), the top of buffer spring (28) is fixed with the bottom of recess (30), and the bottom is fixed with buffering axle (29), the inner wall sliding connection of buffering axle (29) and recess (30), the top of drive shaft (18) and the position that buffering axle (29) correspond are equipped with fan-shaped groove (31).
4. The beating and stirring device for baking base paper according to claim 3, characterized in that: the circulation mechanism (14) comprises a circulation liquid tank (32) with an inclined bottom, a first return pipe (33), a second return pipe (34), a third return pipe (35), a first return pump (36), a second return pump (37), a third filter plate (38), a first baffle plate (39), a second baffle plate (40) and a second pressure sensor (41), wherein the third filter plate (38) is fixed on the inclined bottom inside the circulation liquid tank (32), the third filter plate (38) divides the inside of the circulation liquid tank (32) into two cavities, namely an upper circulation cavity (42) and a lower circulation cavity (43), the input end and the output end of the first return pump (36) are respectively communicated with the stirring area (8) and the upper circulation cavity (42) through the first return pipe (33), the input end and the output end of the second return pump (37) are respectively communicated with the upper circulation cavity (42) and the first pulping area (6) through the second return pipe (34), and one end of the second return pipe (34) close to the upper cavity is flush with the top of the third filter plate (38), two ends of the third return pipe (35) are respectively communicated with the second beating area (7) and the lower circulating cavity (43), the first baffle plate (39) and the second baffle plate (40) are fixed on the third filter plate (38), the height of the first baffle plate (39) is larger than that of the second baffle plate (40), the second pressure sensor (41) is positioned between the first baffle plate (39) and the second baffle plate (40), and the second pressure sensor (41) is fixed on the third filter plate (38).
5. The beating and stirring device for baking base paper according to claim 4, characterized in that: the auxiliary mechanism comprises a beating degree measuring instrument (44) and an auxiliary agent filling device, wherein the output end of the beating degree measuring instrument (44) is communicated with the second beating area (7), and the output end of the auxiliary agent filling device is communicated with the stirring area (8).
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| CN205653661U (en) * | 2016-06-01 | 2016-10-19 | 北京中科奥倍超声波技术研究院 | Wood pulp mill is assisted to supersound |
| CN106012679B (en) * | 2016-06-15 | 2018-12-18 | 浙江凯丰新材料股份有限公司 | A kind of preparation method and its material-stirring device of self-adhering-type medico paper |
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