CN116334954A - Sizing process for coated paperboard - Google Patents
Sizing process for coated paperboard Download PDFInfo
- Publication number
- CN116334954A CN116334954A CN202310545366.6A CN202310545366A CN116334954A CN 116334954 A CN116334954 A CN 116334954A CN 202310545366 A CN202310545366 A CN 202310545366A CN 116334954 A CN116334954 A CN 116334954A
- Authority
- CN
- China
- Prior art keywords
- sizing
- coated
- rubber roll
- coated paperboard
- sizing agent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004513 sizing Methods 0.000 title claims abstract description 100
- 239000011087 paperboard Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 41
- 230000008569 process Effects 0.000 title claims abstract description 38
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 36
- 239000011248 coating agent Substances 0.000 claims abstract description 18
- 238000000576 coating method Methods 0.000 claims abstract description 18
- 239000006185 dispersion Substances 0.000 claims abstract description 16
- 229920002472 Starch Polymers 0.000 claims abstract description 12
- 239000008107 starch Substances 0.000 claims abstract description 12
- 235000019698 starch Nutrition 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000012216 screening Methods 0.000 claims abstract description 9
- 239000003595 mist Substances 0.000 claims abstract description 8
- 230000009471 action Effects 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 238000005507 spraying Methods 0.000 claims abstract description 5
- 238000001125 extrusion Methods 0.000 claims abstract description 4
- 239000002699 waste material Substances 0.000 claims abstract description 4
- 239000003292 glue Substances 0.000 claims description 16
- 238000004321 preservation Methods 0.000 claims description 13
- 239000000084 colloidal system Substances 0.000 claims description 12
- 238000010411 cooking Methods 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 229920001875 Ebonite Polymers 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 6
- 239000004382 Amylase Substances 0.000 claims description 3
- 102000013142 Amylases Human genes 0.000 claims description 3
- 108010065511 Amylases Proteins 0.000 claims description 3
- 235000019418 amylase Nutrition 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 238000006911 enzymatic reaction Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000000123 paper Substances 0.000 abstract description 28
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 238000010992 reflux Methods 0.000 abstract 1
- 230000005489 elastic deformation Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 229920002261 Corn starch Polymers 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000008120 corn starch Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
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
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
- D21H23/56—Rolls
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
- D21H23/56—Rolls
- D21H23/58—Details thereof, e.g. surface characteristics, peripheral speed
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/78—Controlling or regulating not limited to any particular process or apparatus
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Paper (AREA)
Abstract
The application discloses a sizing process of coated paperboard, which belongs to the technical field of sizing processes and comprises the following steps: the method comprises the steps of controlling coated paperboard to pass through a gap between an upper rubber roll and a lower rubber roll, and uniformly coating sizing agent on the front surface of the coated paperboard by an upper rubber tube under the extrusion action of the upper rubber roll and the lower rubber roll; continuously and uniformly spraying water mist on the back surface of the coated paperboard in the process that the sizing agent is uniformly coated on the front surface of the coated paperboard; and (3) refluxing the redundant sizing agent between the upper rubber roll and the lower rubber roll and the redundant sizing agent in the upper rubber tube into a vibrating screen for screening treatment, wherein the oversize is discharged through a waste liquid tube and then subjected to secondary screening treatment, and the undersize flows into a dispersion tank again through a guide tube for sizing and utilization of the upper rubber tube. The application provides a coating board sizing process can reduce the quantity of sizing starch and steam, reduces manufacturing cost, can also reduce the paper page rewet degree, reduces the probability of breaking paper, improves the efficiency of paper production.
Description
Technical Field
The invention relates to the technical field of sizing technology, in particular to a sizing technology of coated board paper.
Background
The traditional coating series paperboard comprises a coated white board, a coated white card, a coated ox card, a coated laminated base paper and the like which are generally manufactured by adopting a double-sided sizing process, and the coated white board, the coated ox card, the coated laminated base paper and the like enter a coating section through drying, wherein three-way coating or two-way coating are carried out on the front side, and the back side scraper is used for sizing (which is equivalent to two-way sizing), so that the problem that the coated paperboard is easy to break after sizing is easily caused, and meanwhile, the use amount of sizing starch is large, the gas consumption is high, and the cost is high.
Disclosure of Invention
The invention has the advantages that the invention provides a coated board sizing process, wherein the process of synchronously spraying water mist on the front surface and the back surface is adopted to size the coated board, so that the consumption of sizing starch can be effectively reduced, the production cost is reduced, the paper sheet rewet can be effectively reduced, the probability of paper breakage is further reduced, the paper production efficiency is improved, the post-baking steam consumption is also reduced, and the total gas consumption and the cost are further reduced.
The invention has the advantages that the invention provides a coated paperboard sizing process, wherein when coated paperboard enters the nip gap of the upper rubber roller and the lower rubber roller, the coated paperboard can be subjected to certain elastic deformation based on the softer characteristic of the soft rubber sleeve, so that the glue leakage phenomenon of the upper rubber roller and the lower rubber roller is effectively reduced, the recycling rate of the glue is improved, the resources are saved, the cost is reduced, and in addition, the elastic deformation capability of the soft rubber sleeve can also reduce the probability of paper breakage and improve the efficiency and quality of paper production.
To achieve at least one of the above advantages, the present invention provides a coated board sizing process comprising the steps of:
s11, controlling the coated paperboard to pass through a gap between an upper rubber roll and a lower rubber roll, and uniformly coating sizing agent on the front surface of the coated paperboard by an upper rubber tube under the extrusion action of the upper rubber roll and the lower rubber roll;
s12, continuously and uniformly spraying water mist on the back surface of the coated paperboard in the process that the sizing agent is uniformly coated on the front surface of the coated paperboard;
s13, the redundant sizing agent between the upper rubber roller and the lower rubber roller and the redundant sizing agent in the upper rubber tube are reflowed to a vibrating screen for screening treatment, wherein the oversize is discharged through a waste liquid pipe and then subjected to secondary screening treatment, and the undersize flows into a dispersion tank again through a guide pipe for sizing and utilization of the upper rubber tube.
According to one embodiment of the invention, the upper rubber roll sleeve is provided with a hard rubber sleeve, the lower rubber roll sleeve is provided with a soft rubber sleeve, and the hardness of the hard rubber sleeve is greater than that of the soft rubber sleeve.
According to one embodiment of the invention, the soft rubber sleeve is arched with a high middle and low two ends.
According to one embodiment of the invention, the buckling width of the upper rubber roll and the lower rubber roll is 15 mm-20 mm.
According to an embodiment of the present invention, in step S11, the relative distribution positions of the upper rubber roll and the lower rubber roll are controlled, so that the tangential plane between the upper rubber roll and the lower rubber roll maintains an upward inclined extension angle, and simultaneously, the angle of the coated paperboard entering the upper rubber roll and the lower rubber roll nip is controlled, so that a V-shaped glue containing structure with an upward opening is formed between the upper rubber roll and the coated paperboard, and the upper rubber tube sprays the sizing agent into the V-shaped glue containing structure.
According to an embodiment of the invention, the angle of the coated paperboard entering the upper rubber roll and the lower rubber roll nip is controlled so that the included angle between the coated paperboard and a datum line is 23-35 degrees, and the coated paperboard is contacted with the lower rubber roll to form a wrap angle, wherein the datum line is a connecting line between the center point of the upper rubber roll and the center point of the lower rubber roll;
meanwhile, the contact position of the coated paperboard and the lower rubber roll is controlled to be higher than the liquid level of the sizing agent in the V-shaped rubber containing structure.
According to an embodiment of the present invention, the method for preparing the sizing agent sequentially includes the following steps:
s21, adding edible starch and water into a dispersion tank for uniform dispersion treatment after weighing, wherein the concentration of starch in the dispersion tank is 22% -26%;
s22, adding amylase into the dispersion tank for mixing treatment, sieving after uniform mixing, conveying into a cooking barrel, heating to 75-80 ℃ under the action of steam, and performing cooking treatment to form mixed colloid;
s23, transferring the mixed colloid into an enzyme reaction tank for heat preservation, performing primary gelatinization reaction, then transferring the mixed colloid into a cooking barrel again, continuously performing secondary gelatinization reaction after the cooking temperature is raised to 120-130 ℃, performing secondary heat preservation, and controlling the viscosity range in the secondary heat preservation process;
s24, removing excessive steam to form the sizing agent, and then guiding the sizing agent into a sizing barrel for the sizing pipe.
According to an embodiment of the present invention, in step S23, the time for the secondary gelatinization reaction is 15min to 20min.
According to an embodiment of the present invention, in the step S23, the secondary heat preservation time is 15min to 25min, and in the secondary heat preservation process, the viscosity of the mixed colloid is controlled to be 20mpa·s to 40mpa·s in the temperature range of 60 ℃ to 75 ℃ and the concentration range of 7% -9%.
According to an embodiment of the invention, the sizing process for coated board further comprises a step S14 of back-coating sizing, wherein the concentration of the back-coating sizing is 7.5% -8.5%.
These and other objects, features and advantages of the present invention will become more fully apparent from the following detailed description.
Drawings
FIG. 1 shows a schematic flow chart of a sizing process for coated board paper according to a preferred embodiment of the present application.
Fig. 2 shows a schematic partial structure of a rubber roll used in the sizing process of the present application.
Reference numerals: 10-coated paperboard, 20-an upper rubber roller, 30-a lower rubber roller, 40-an upper rubber tube, 41-a spray head, 50-a fan-shaped spray head and a 60-V type rubber containing structure.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the invention. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
It will be appreciated by those skilled in the art that in the disclosure of the present specification, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, the above terms should not be construed as limiting the present invention.
It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.
The coated series of board papers can also be called coated white boards, coated white cards, coated ox cards or coated laminated base papers, and the problems of large consumption of sizing starch, easy breaking of paper after sizing and the like existing in the conventional double-sided sizing process have long plagued the coating sizing industry, so the coated board paper sizing process is provided.
Specifically, referring to fig. 1 and 2, a coated board sizing process according to a preferred embodiment of the present invention will be described in detail below, wherein the coated board sizing process comprises the steps of:
s11, controlling the coated paperboard 10 to pass through a gap between the upper rubber roll 20 and the lower rubber roll 30, and uniformly coating sizing agent on the front surface of the coated paperboard 10 by the upper rubber tube 40 under the extrusion action of the upper rubber roll 20 and the lower rubber roll 30;
s12, continuously and uniformly spraying water mist on the back surface of the coated paperboard 10 through the fan-shaped spray nozzle 50 in the process that the sizing agent is uniformly coated on the front surface of the coated paperboard 10;
s13, the redundant sizing agent between the upper rubber roll 20 and the lower rubber roll 30 and the redundant sizing agent in the upper rubber tube 40 are reflowed into a vibrating screen for screening treatment, wherein the vibrating screen is driven by an eccentric wheel, and the screen mesh is a metal mesh with 80 meshes, wherein the oversize is discharged through a waste liquid pipe and then subjected to secondary screening treatment, and the undersize flows into a dispersion tank again through a guide pipe for sizing and reutilization of the upper rubber tube 40.
The traditional double-sided sizing is improved into single-sided front sizing, and meanwhile, the back of the coated paperboard 10 is not sized, but water mist is uniformly sprayed through the fan-shaped spray nozzle 50, so that the back of the coated paperboard can be effectively protected, the problems of abrasion, paper sticking and the like of the lower rubber roll 30 are avoided, the rewet of paper sheets can be effectively reduced, the paper breaking probability is reduced, the production efficiency and the production quality are further improved, the post-baking steam consumption is reduced by 0.15-0.2 unit, meanwhile, the surface glue starch consumption is reduced by 30%, the sizing starch consumption is greatly reduced, resources are saved, and the production cost is also greatly reduced.
In one embodiment, the upper rubber roll 20 is sleeved with a hard rubber sleeve, meanwhile, the lower rubber roll 30 is sleeved with a soft rubber sleeve, the hardness of the hard rubber sleeve is greater than that of the soft rubber sleeve, the hardness of the hard rubber sleeve can be 100, and the hardness of the soft rubber sleeve can be 80, so that when the coated paperboard 10 passes through the roller press areas of the upper rubber roll 20 and the lower rubber roll 30, the soft rubber sleeve is elastically deformed to a certain extent, the rubber leakage phenomenon between the upper rubber roll 20 and the lower rubber roll 30 can be reduced, the glue is guaranteed to flow back into the recovery box from two sides of the upper rubber roll and the lower rubber roll, the glue is collected, and then screening treatment is performed, so that the recovery utilization rate of the glue is improved. In addition, it is also noted that the elastic deformation capability of the soft rubber sleeve can also reduce the probability of paper breakage to a certain extent, and further improve the production efficiency and the production quality of paper.
In one embodiment, the soft rubber sleeve is in an arch shape with a high middle and low two ends, so that the flowing trend of the middle part of the rubber roller towards two sides can be increased, the efficiency and speed of the backflow of the redundant sizing agent are improved, the sizing is more uniform and smooth, the sizing quality is improved, the extruded tightness between the upper rubber roller 20 and the lower rubber roller 30 can be improved, the rubber leakage phenomenon between the two rubber rollers is reduced, and in addition, the buckling width of the upper rubber roller 20 and the lower rubber roller 30 is 15-20 mm.
In a preferred embodiment, in step S11, the relative distribution positions of the upper rubber roll 20 and the lower rubber roll 30 are controlled, so that the tangential surface between the upper rubber roll 20 and the lower rubber roll 30 maintains an upward inclined extending angle, and the angle of the coated paperboard 10 entering the roll nip of the upper rubber roll 20 and the lower rubber roll 30 is controlled, so that an upward opening V-shaped glue containing structure 60 is formed between the upper rubber roll 20 and the coated paperboard 10, and the upper rubber tube 40 sprays the sizing agent into the V-shaped glue containing structure 60, the sizing agent overflows in the V-shaped glue containing structure 60, and simultaneously, the front surface of the coated paperboard 10 can be completely immersed in the sizing agent, thereby greatly increasing the contact area between paper and sizing agent, and improving the sizing efficiency.
In general, each of the upper hoses 40 may be disposed to extend along the length direction of the upper rubber roll 20 at a distance of 40 cm from the rubber roll and installed above the upper rubber roll 20, and spray pipes are installed at uniform intervals of 50 cm on the upper rubber roll 40, and spray heads 41 of each spray pipe are inclined to extend toward the position where the upper rubber roll 20 and the lower rubber roll 30 are pressed against each other, while fan-shaped spray heads 50 are disposed at parallel positions of the lower rubber roll 30 with their spray heads vertically facing the roll surface of the lower rubber roll 30.
Further preferably, the angle of the coated paperboard 10 entering the roller nip of the upper rubber roll 20 and the lower rubber roll 30 is controlled so that the included angle between the coated paperboard 10 and a reference line is 23-35 degrees, preferably 30 degrees, and the coated paperboard 10 is firstly contacted with the lower rubber roll 30 to form a wrap angle, so that the glue leakage phenomenon between the upper rubber roll 20 and the lower rubber roll 30 is reduced, wherein the reference line is a connecting line between the central point of the upper rubber roll 20 and the central point of the lower rubber roll 30;
meanwhile, the contact position of the coated paperboard 10 and the lower rubber roll 30 is controlled to be higher than the liquid level of the sizing agent in the V-shaped glue containing structure 60, so that the coated paperboard 10 is firstly contacted with the lower rubber roll 30 with water mist before entering the sizing agent, a certain water mist infiltration is obtained, the probability of sizing and paper breakage can be reduced, the stiffness and the bulk of paper can be obviously improved, and the cost can be effectively saved on the premise of ensuring the product quality.
As a preferred embodiment, the method for preparing the sizing agent comprises the following steps in sequence:
s21, adding edible starch (mainly corn starch) into a dispersion tank together with water for uniform dispersion treatment after metering and weighing, wherein the concentration of starch in the dispersion tank is 22% -26%;
s22, adding amylase into the dispersion tank for mixing and stirring treatment, sieving the mixture after uniform mixing through a vibrating screen, conveying the mixture into a cooking barrel, heating the mixture to 75-80 ℃ under the action of steam, and performing cooking treatment to form mixed colloid;
s23, transferring the mixed colloid into an enzyme reaction tank for heat preservation, wherein the heat preservation time is preferably 15-20 min, performing primary gelatinization reaction, then transferring the mixed colloid into a cooking barrel again, at the moment, continuously performing secondary gelatinization reaction after the cooking temperature is increased to 120-130 ℃, preferably, the time of the secondary gelatinization reaction is 15-20 min, and then performing secondary heat preservation, wherein the time of the secondary heat preservation is preferably 15-25 min, such as 20min, and the viscosity range is controlled in the secondary heat preservation process, wherein the controlled viscosity range is 20 mPa.s-40 mPa.s, for example, the mixed colloid is in the temperature range of 60-75 ℃ and in the concentration range of 7-9%;
and S24, finally removing excessive steam through a steam separator to form the sizing agent, and then guiding the sizing agent into a sizing barrel for use by the sizing pipe.
In view of the fact that the back side of the coated board is not glued, the paper may warp, and therefore, it is further preferred that the coated board sizing process further comprises step S14, back-coating sizing, wherein the concentration of back-coating sizing is increased from conventional 5% to 7.5% to 8.5%, preferably 8%, so that the product quality of the coated board can be further improved by increasing the back-coating sizing concentration by a small amount, whereby the back-coating amount is increased to less than 0.5g, but the overall sizing amount of the paper is reduced by 1.5g and the steam usage amount per ton of paper is reduced by 0.15 to 0.2 units, and the production cost is directly saved by about 50 yuan/ton.
To the sizing process that this application provided, membrane transfer size press convenient operation need not to change the direction of paper, and the lower metering rod roof beam of throw off can, install fan-shaped sprinkler additional, very convenient.
It should be noted that the terms "first" and "second" are used for descriptive purposes only, and are not meant to indicate any order, but are not to be construed as indicating or implying any relative importance, and such terms are to be construed as names.
It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are by way of example only and are not limiting. The advantages of the present invention have been fully and effectively realized. The functional and structural principles of the present invention have been shown and described in the examples and embodiments of the invention may be modified or practiced without departing from the principles described.
Claims (10)
1. The sizing process for the coated paperboard is characterized by comprising the following steps of:
s11, controlling the coated paperboard to pass through a gap between an upper rubber roll and a lower rubber roll, and uniformly coating sizing agent on the front surface of the coated paperboard by an upper rubber tube under the extrusion action of the upper rubber roll and the lower rubber roll;
s12, continuously and uniformly spraying water mist on the back surface of the coated paperboard in the process that the sizing agent is uniformly coated on the front surface of the coated paperboard;
s13, the redundant sizing agent between the upper rubber roller and the lower rubber roller and the redundant sizing agent in the upper rubber tube are reflowed to a vibrating screen for screening treatment, wherein the oversize is discharged through a waste liquid pipe and then subjected to secondary screening treatment, and the undersize flows into a dispersion tank again through a guide pipe for sizing and utilization of the upper rubber tube.
2. The coated board sizing process of claim 1, wherein the upper rubber roll sleeve is provided with a hard rubber sleeve, the lower rubber roll sleeve is provided with a soft rubber sleeve, and the hardness of the hard rubber sleeve is greater than the hardness of the soft rubber sleeve.
3. The coated board sizing process of claim 2, wherein said soft rubber sleeve has a high middle and a low end arch.
4. A coated board sizing process according to claim 3, wherein the upper and lower glue rolls have a buckling width of 15mm to 20mm.
5. The coated paperboard sizing process according to any one of claims 1 to 4, wherein in step S11, the relative distribution positions of the upper and lower rubber rolls are controlled so that the tangential surfaces between the upper and lower rubber rolls maintain an inclined upward extension angle, while the angle at which the coated paperboard enters the upper and lower rubber roll nips is controlled so that an upwardly opening V-shaped glue containing structure is formed between the upper and lower rubber rolls and the upper hose sprays sizing agent into the V-shaped glue containing structure.
6. The coated paperboard sizing process of claim 5, wherein the angle of the coated paperboard entering the upper and lower calender nips is controlled such that the angle between the coated paperboard and a reference line is 23 ° to 35 ° and such that the coated paperboard first contacts the lower calender to form a wrap angle, wherein the reference line is a line between the center point of the upper calender and the center point of the lower calender;
meanwhile, the contact position of the coated paperboard and the lower rubber roll is controlled to be higher than the liquid level of the sizing agent in the V-shaped rubber containing structure.
7. The coated board sizing process of claim 1, wherein the sizing agent is formulated by the steps of, in order:
s21, adding edible starch and water into a dispersion tank for uniform dispersion treatment after weighing, wherein the concentration of starch in the dispersion tank is 22% -26%;
s22, adding amylase into the dispersion tank for mixing treatment, sieving after uniform mixing, conveying into a cooking barrel, heating to 75-80 ℃ under the action of steam, and performing cooking treatment to form mixed colloid;
s23, transferring the mixed colloid into an enzyme reaction tank for heat preservation, performing primary gelatinization reaction, then transferring the mixed colloid into a cooking barrel again, continuously performing secondary gelatinization reaction after the cooking temperature is raised to 120-130 ℃, performing secondary heat preservation, and controlling the viscosity range in the secondary heat preservation process;
s24, removing excessive steam to form the sizing agent, and then guiding the sizing agent into a sizing barrel for the sizing pipe.
8. The coated board sizing process according to claim 7, wherein the time for the secondary gelatinization reaction is 15 to 20 minutes in step S23.
9. The sizing process for coated board according to claim 7, wherein in step S23, the secondary heat-insulating time is 15 to 25 minutes, and the viscosity of the mixed colloid is controlled to be 20 to 40mPa S in a temperature range of 60 to 75 ℃ and a concentration range of 7 to 9% during the secondary heat-insulating process.
10. The coated board sizing process of claim 1, further comprising step S14, back-coating sizing, wherein the concentration of back-coating sizing is 7.5% to 8.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310545366.6A CN116334954A (en) | 2023-05-15 | 2023-05-15 | Sizing process for coated paperboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310545366.6A CN116334954A (en) | 2023-05-15 | 2023-05-15 | Sizing process for coated paperboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116334954A true CN116334954A (en) | 2023-06-27 |
Family
ID=86887966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310545366.6A Pending CN116334954A (en) | 2023-05-15 | 2023-05-15 | Sizing process for coated paperboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116334954A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103184714A (en) * | 2011-12-31 | 2013-07-03 | 广东侨盛防伪材料有限公司 | Back water-coating device |
| CN103230088A (en) * | 2013-02-27 | 2013-08-07 | 广东省金叶烟草薄片技术开发有限公司 | Method for reducing difference on two sides of paper-making reconstituted tobacco |
| CN205529685U (en) * | 2016-05-04 | 2016-08-31 | 玖龙纸业（太仓）有限公司 | Prevent paper opens warpage device |
| CN108049245A (en) * | 2018-01-08 | 2018-05-18 | 常德金德新材料科技股份有限公司 | Paper coating equipment and coating method |
| CN108221478A (en) * | 2018-03-22 | 2018-06-29 | 浙江荣晟环保纸业股份有限公司 | A kind of immersion type surface sizing technique |
| CN108824062A (en) * | 2018-08-15 | 2018-11-16 | 联盛纸业（龙海）有限公司 | A kind of production method of OCC slurry substitution ONP slurry production coated manila |
| CN111350101A (en) * | 2020-04-01 | 2020-06-30 | 东营华泰清河实业有限公司 | Cultural paper surface sizing agent process |
| CN215329033U (en) * | 2021-06-03 | 2021-12-28 | 东莞金洲纸业有限公司 | Gluing system of soaking glue applicator |
-
2023
- 2023-05-15 CN CN202310545366.6A patent/CN116334954A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103184714A (en) * | 2011-12-31 | 2013-07-03 | 广东侨盛防伪材料有限公司 | Back water-coating device |
| CN103230088A (en) * | 2013-02-27 | 2013-08-07 | 广东省金叶烟草薄片技术开发有限公司 | Method for reducing difference on two sides of paper-making reconstituted tobacco |
| CN205529685U (en) * | 2016-05-04 | 2016-08-31 | 玖龙纸业（太仓）有限公司 | Prevent paper opens warpage device |
| CN108049245A (en) * | 2018-01-08 | 2018-05-18 | 常德金德新材料科技股份有限公司 | Paper coating equipment and coating method |
| CN108221478A (en) * | 2018-03-22 | 2018-06-29 | 浙江荣晟环保纸业股份有限公司 | A kind of immersion type surface sizing technique |
| CN108824062A (en) * | 2018-08-15 | 2018-11-16 | 联盛纸业（龙海）有限公司 | A kind of production method of OCC slurry substitution ONP slurry production coated manila |
| CN111350101A (en) * | 2020-04-01 | 2020-06-30 | 东营华泰清河实业有限公司 | Cultural paper surface sizing agent process |
| CN215329033U (en) * | 2021-06-03 | 2021-12-28 | 东莞金洲纸业有限公司 | Gluing system of soaking glue applicator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108221478B (en) | Soaking type surface sizing process | |
| EP2075373A1 (en) | Arrangement and method for processing a fibre web | |
| CN103774359B (en) | Spray-rolling type loose fiber washing machine | |
| CN104562830B (en) | A kind of method for improving regenerated fiber cultural paper wet end retention rate | |
| CN108385425B (en) | Preparation process of high-interlayer bonding strength crepe base paper | |
| CN106637754A (en) | Spraying-type loose fiber treatment technology | |
| CN116334954A (en) | Sizing process for coated paperboard | |
| CN109794372A (en) | The production technology and its production line of nano modified inorganic insulation board | |
| CN105672019A (en) | High-looseness thick white cardboard produced from poplar P-RC APMP and production process of high-looseness thick white cardboard | |
| CN103556538A (en) | Sizing method for high-strength corrugated paper | |
| CN208020973U (en) | A kind of printing machine inking device | |
| CN111979843A (en) | Wet-end papermaking process for improving surface smoothness of paper | |
| CN219972804U (en) | Spray set is used in corrugated paper body paper production | |
| CN106637755A (en) | Spraying type loose fiber treatment device | |
| CN220364791U (en) | Online cleaning device for central stone roller of press part of paper machine | |
| CN212889163U (en) | Corrugated paper laminating is with scribbling thick liquid device | |
| CN108166183B (en) | Oiling process in viscose post-treatment refining process | |
| CN202517798U (en) | Cladding machine provided with automatic water spraying device | |
| CN206680811U (en) | Environmentally friendly synthetic paper coating apparatus | |
| CN217628917U (en) | Glass fiber secondary sizing table | |
| CN220538253U (en) | Papermaking equipment and cleaning device for papermaking felt thereof | |
| CN212175337U (en) | Lubricating system of film transfer sizing machine | |
| CN220590904U (en) | High-pressure anti-water-flowing cleaning device | |
| CN2304684Y (en) | Novel transfer squeezing device of paper machine | |
| CN110239150A (en) | Pressure resistant type corrugated board production technique |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |