CN111270558A - Normal production conversion process without changing paper surface color - Google Patents
Normal production conversion process without changing paper surface color Download PDFInfo
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- CN111270558A CN111270558A CN202010129495.3A CN202010129495A CN111270558A CN 111270558 A CN111270558 A CN 111270558A CN 202010129495 A CN202010129495 A CN 202010129495A CN 111270558 A CN111270558 A CN 111270558A
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Classifications
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- 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
- D21H23/70—Multistep processes; Apparatus for adding one or several substances in portions or in various ways to the paper, not covered by another single group of this main group
- D21H23/72—Plural serial stages only
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/28—Colorants ; Pigments or opacifying agents
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/32—Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper
- D21H23/34—Knife or blade type coaters
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- Paper (AREA)
Abstract
A kind of paper color (under the situation of not shutting down or breaking paper) can change the color mixing process directly in the online production, the production line used for switching the first paper kind to producing the second paper kind, wherein the paper color a value of the first paper kind requires about 0, b value requires about-4.0, the paper color a value of the second paper kind requires + 1.3- +1.45, b value requires-1.8- + 2.0, the paper color of the invention does not change the line and produces the normal conversion process the beneficial effect lies in: by changing the technical process of the production process, the conversion of production lines can be completed without changing the lines in actual production, thereby being beneficial to improving the production efficiency and saving the production cost.
Description
Technical Field
The invention relates to a paper product production process, in particular to a normal production conversion process without changing the color of a paper surface.
Background
The high-grade coated white board paper is mainly used for packaging higher-grade commodities such as toys, shoes, cigarettes, wines, cosmetics and the like. Along with the continuous improvement of the material and cultural living standard of people and the continuous enhancement of aesthetic consciousness, higher and higher requirements are provided for the printing effect of the packaging paper board, which not only can meet the development of printing towards high speed, multicolor and automation, but also can meet the requirement that high-quality exquisite printed matters can be obtained under different printing conditions. The white coated paper has the characteristics of being suitable for packaging, and the key index is printability, namely printability of the paper, which is the condition that the paper can meet the requirements of ink, a printing plate and printing conditions, so that the smooth operation of printing is ensured, and high-quality printed matters are obtained.
With the improvement of the papermaking process, the papermaking technology develops rapidly, the society puts forward higher and higher requirements on paper, and the color requirements on the paper are more and more diversified, for example, white paper is produced, the last production requires about 0 to the a value and about-4.0 to the b value of the paper color (the a value represents red green: a ↓representsred bias, a ↓representsgreen bias, the b value represents yellow blue, + ↓representsyellow bias, and-some radical represents blue bias). The a value of the next secondary product card paper is required to be + 1.3- +1.45, the b value is required to be-1.8- + 2.0, and the difference of the colors of the two varieties is larger in digital view.
For the two types of paper, when switching production, the conventional process usually needs to be stopped, de-coated and complete machine reformed, but if the production is stopped, the production efficiency and the production cost of an enterprise are seriously affected, so that the conventional production process needs to be adjusted to complete the switching of production lines without stopping the production.
Disclosure of Invention
Therefore, the conversion process for normal production without changing the color of the paper surface is needed to overcome the defects in the prior art.
The invention is realized by the following modes:
1) determining the second paper type according to the transfer time, and controlling the liquid level of the pre-feeding trough according to 35% 60min before the transfer;
2) determining the second paper type according to the transfer time, wherein the liquid level of the middle feeding tank is controlled according to 35% 60min before the transfer;
3) determining the second paper type according to the transfer time, wherein the liquid level of the surface feed tank is controlled according to 35% 60min before the transfer;
4) carrying out pre-coating, middle coating and surface coating process treatment 60min before transferring, preparing one pot in each coating building preparation groove according to the second paper pigment process standard, adding every pot (20kg 70 percent), and stopping adding the blue pigment in a specified area for preparation;
5) 2-3 hours before the transfer printing, preparing the one-pot top coating by the top coating preparation tank without adding purple and blue dye blank coatings, and preparing the materials to be treated by using a ton bucket in advance;
6) before color matching, the liquid level of the pre-coating storage tank, the liquid level of the middle-surface coating storage tank and the liquid level of the top-surface coating storage tank are well controlled, the liquid level of the pre-coating storage tank is pumped out 1 to 2 hours in advance before color matching, the storage tank is cleaned, and the storage tank is put into practice and the material lifting pump pipeline is washed to the vibrating screen in series;
7) before color matching, arranging the paints of the middle coating storage tank to mutually beat the paints of the pre-coating feeding tank for use according to the liquid level evacuation time of the pre-coating storage tank, calculating the liquid level exhaustion time of the paints of the middle coating storage tank, and controlling the low liquid level of the storage tank as good as possible by middle coating during copying;
8) during the paper making, the top coating feeding groove is immediately arranged for the ton bucket to wait for the materials to be used without adding purple and blue pigment blank coatings into the feeding groove until the materials are completely added;
9) when the surface coating is transferred, all the coating liquid levels of the surface coating storage tank are simultaneously and synchronously emptied, the residual coating in the simple washing storage tank is arranged, and the material is pumped to a vibrating screen pipeline to be washed cleanly;
10) in the first paper type transferring process of the paper machine, after precoating and surface coating first pot coating material discharging storage tanks perform precoating and surface coating first pot coating material beating to a feeding tank, precoating continues to perform precoating and middle coating mutual beating, then liquid level discharging treatment of the middle coating storage tanks is arranged, after the storage tanks are washed clean, the to-be-coated coating material is discharged to the storage tanks for use, before middle coating beating to the feeding tank, the storage tanks to the feeding tank vibrating screen pipeline must be serially washed clean, and then the to-be-coated coating material can be beaten for use;
11) after the paint is returned to the material feeding tanks, the material feeding tanks can discharge material for 1-2 times. The large fluctuation of the color difference of the coating is reduced;
12) and detecting the data of L, a and b values immediately after the paper is rolled, and adding or reducing the addition of purple and blue pigments in a top coating properly in a control range according to the color standard of the violet paper surface to meet the color quality requirement.
The paper surface color line-changing-free normal production conversion process has the beneficial effects that: by changing the technical process of the production process, the conversion of production lines can be completed without changing the lines in actual production, thereby being beneficial to improving the production efficiency and saving the production cost.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments.
The embodiment provides a normal production conversion process without changing the paper color (under the condition of no stop or paper break), which is used for switching a production line of a first paper type to a production line for producing a second paper type, wherein the paper color a value of the first paper type is required to be about 0, and the b value is required to be about-4.0, the paper color a value of the second paper type is required to be +1.3 to +1.45, and the b value is required to be-1.8 to-2.0, and the normal production conversion process without changing the paper color comprises the following steps:
1. and (4) determining according to the second paper type transfer time, and controlling the liquid level of the pre-feeding tank according to 35% 60min before the second paper type transfer.
2. And (4) determining according to the second paper type transferring time, wherein the liquid level of the middle feeding tank is controlled according to 35% 60min before transferring.
3. And (4) determining according to the second paper type transferring time, wherein the liquid level of the surface feed tank is controlled according to 35% 60min before transferring.
4. And (3) performing pre-coating, middle coating and top coating process treatment 60min before transferring, preparing one pot in each coating building preparation tank according to the second paper pigment process standard, adding 20kg by 70 percent of pigment, and stopping adding the blue pigment in a specified area for preparation.
5. 2-3 hours before transferring, the top coating preparation tank prepares the one-pot top coating without adding 'purple and blue' dye blank coatings, and a ton of barreled top coating is used in advance to prepare the treatment of the waiting materials.
6. Before color matching, the liquid level of the pre-coating storage tank, the liquid level of the middle-surface coating storage tank and the liquid level of the top-surface coating storage tank are well controlled, before color matching, the liquid level of the pre-coating storage tank needs to be pumped out 1-2 hours in advance, the storage tank is cleaned, and the storage tank is placed into a material lifting pump pipeline and washed to a vibrating screen in series.
7. Before color matching, according to the liquid level evacuation time of the pre-coating storage tank, arranging the coating of the middle coating storage tank to mutually beat the coating of the pre-coating feeding tank for use, then calculating the time for the liquid level of the coating of the middle coating storage tank to be used up, and controlling the low liquid level of the storage tank as good as possible by middle coating during copying.
8. During the rotary copying, the top coating feeding groove is immediately arranged for the ton bucket to wait for the materials to be added into the feeding groove without adding purple and blue pigment blank coatings until the materials are added.
9. When the surface coating is transferred, all the coating liquid levels of the surface coating storage tank are simultaneously and synchronously emptied, the residual coating in the storage tank is simply washed, and the material lifting pump is connected to the vibrating screen pipeline to be washed cleanly.
10. In the process of paper machine rotating to paper a first paper type, after precoating and surface coating first pot coating material discharging storage tank and precoating and surface coating material beating are carried out to a feeding tank, precoating is carried out to carry out precoating and middle coating mutual beating, then middle coating storage tank liquid level discharging treatment is arranged, after the storage tank is washed completely, the storage tank is used by putting coating material to be treated to the storage tank, before middle coating beating material reaches the feeding tank, the storage tank can be used by beating material after the storage tank reaches the feeding tank vibrating screen pipeline and the system must be washed in series.
11. After the paint is fed into the feeding tanks, the feeding tanks are fed with high liquid level for proper discharge for 1-2 times. And the large fluctuation of the color difference of the coating is reduced.
12. And detecting the data of L, a and b values immediately after the paper is rolled, and adding or reducing the addition of purple and blue pigments in a top coating properly in a control range according to the color standard of the violet paper surface so as to meet the color quality requirement.
In step 4, the preparation process of the pre-coating, the middle coating and the top coating is as follows:
1) pre-coating start-up procedure: (addition) GCC-60 → Low speed stirring 1 minute → high speed stirring → antifoaming agent → dispersant, clear water → thickener → coating starch → CBC starch → high speed Low speed rotation → blue dye → purple dye → Water repellent → Lubricant → caustic soda → latex → stop the stirrer, end of the procedure! (samples were taken to test coating solids, viscosity, pH, temperature);
2) the start program of the intermediate coating: (addition) GCC-65 → low speed stirring for 1 minute → high speed stirring → antifoaming agent → 1# china clay → dispersant, clear water → thickener → coating starch → CBC starch → high speed low speed stirring for blue dye → purple dye → water repellent agent → lubricant → caustic soda → latex → stop the stirrer, end of the procedure! (samples were taken to test coating solids, viscosity, pH, temperature);
3) the surface coating paint starting program comprises the following steps: (addition) GCC-95 → low speed stirring for 1 minute → high speed stirring → foam inhibitor → 1# china clay → dispersant, clear water → high speed low speed → water repellent → lubricant → caustic soda → latex → VAE latex → rheological agent → selection procedure [ 1 ] stop the stirrer, sample for testing paint solid content, viscosity, PH value, temperature. And → the addition amount of the supplemented blue and purple dyes is adjusted according to the ab value of the finished paper → the stirrer is started to stir at low speed → the blue dye → the purple dye → the stirring and the dispersion are carried out for 5min, and then the program operation is stopped. Selecting the procedure [ 2 ] -. And → the addition amount of the replenished blue and purple dyes is adjusted according to the ab value of the finished paper → the stirrer is started to stir at low speed → the blue dyes → the purple dyes → the program operation is stopped after stirring and dispersing for 5 min.
Wherein GCC-60 is calcium carbonate grade 60, GCC-65 is calcium carbonate grade 65, GCC-95 is calcium carbonate grade 95, VAE latex is acetic acid latex, and CBC starch is modified starch.
In step 10, the coating machine coating process is as follows:
1) pre-coating and coating machine-arranging flow: coating preparation → sampling detection → coating storage tank → vibrating screen → feed tank → pressure screen → coating feeding tray → scraper coating → reflux coarse screen → feed tank → continuous cyclic feeding in normal production
2) The process of the floating coat coating machine comprises the following steps: coating preparation → sampling detection → coating storage tank → vibrating screen → feed tank → pressure screen → coating feeding tray → scraper coating → reflux coarse screen → feed tank → continuous cyclic feeding in normal production
3) The top coating and coating process comprises the following steps: coating preparation → sampling detection → coating storage tank → vibrating screen → feed tank → pressure screen → coating feeding tray → scraper coating → reflux vibrating screen → feed tank → continuous circulation feeding when production is normal.
The paper surface color line-changing-free normal production conversion process has the beneficial effects that: by changing the technical process of the production process, the conversion of production lines can be completed without changing the lines in actual production, thereby being beneficial to improving the production efficiency and saving the production cost.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (3)
1. A normal production conversion process for color of a paper surface without changing lines is characterized by comprising the following steps: 1) determining the second paper type according to the transfer time, and controlling the liquid level of the pre-feeding trough according to 35% 60min before the transfer;
2) determining the second paper type according to the transfer time, wherein the liquid level of the middle feeding tank is controlled according to 35% 60min before the transfer;
3) determining the second paper type according to the transfer time, wherein the liquid level of the surface feed tank is controlled according to 35% 60min before the transfer;
4) carrying out pre-coating, middle coating and surface coating process treatment 60min before transferring, preparing one pot in each coating building preparation groove according to the second paper pigment process standard, adding every pot (20kg 70 percent), and stopping adding the blue pigment in a specified area for preparation;
5) 2-3 hours before the transfer printing, preparing the one-pot top coating by the top coating preparation tank without adding purple and blue dye blank coatings, and preparing the materials to be treated by using a ton bucket in advance;
6) before color matching, the liquid level of the pre-coating storage tank, the liquid level of the middle-surface coating storage tank and the liquid level of the top-surface coating storage tank are well controlled, the liquid level of the pre-coating storage tank is pumped out 1 to 2 hours in advance before color matching, the storage tank is cleaned, and the storage tank is put into practice and the material lifting pump pipeline is washed to the vibrating screen in series;
7) before color matching, arranging the paints of the middle coating storage tank to mutually beat the paints of the pre-coating feeding tank for use according to the liquid level evacuation time of the pre-coating storage tank, calculating the liquid level exhaustion time of the paints of the middle coating storage tank, and controlling the low liquid level of the storage tank as good as possible by middle coating during copying;
8) during the paper making, the top coating feeding groove is immediately arranged for the ton bucket to wait for the materials to be used without adding purple and blue pigment blank coatings into the feeding groove until the materials are completely added;
9) when the surface coating is transferred, all the coating liquid levels of the surface coating storage tank are simultaneously and synchronously emptied, the residual coating in the simple washing storage tank is arranged, and the material is pumped to a vibrating screen pipeline to be washed cleanly;
10) in the first paper type transferring process of the paper machine, after precoating and surface coating first pot coating material discharging storage tanks perform precoating and surface coating first pot coating material beating to a feeding tank, precoating continues to perform precoating and middle coating mutual beating, then liquid level discharging treatment of the middle coating storage tanks is arranged, after the storage tanks are washed clean, the to-be-coated coating material is discharged to the storage tanks for use, before middle coating beating to the feeding tank, the storage tanks to the feeding tank vibrating screen pipeline must be serially washed clean, and then the to-be-coated coating material can be beaten for use;
11) after the paint is returned to the material feeding tanks, the material feeding tanks can discharge material for 1-2 times. The large fluctuation of the color difference of the coating is reduced;
12) and detecting the data of L, a and b values immediately after the paper is rolled, and adding or reducing the addition of purple and blue pigments in a top coating properly in a control range according to the color standard of the violet paper surface to meet the color quality requirement.
2. The process of claim 1 for converting normal production of paper color without changing line,
in step 4, the preparation process of the pre-coating, the middle coating and the top coating is as follows:
1) pre-coating start-up procedure: adding GCC-60 → stirring at low speed for 1 minute → stirring at high speed → foam inhibitor → dispersant, clear water → thickener → coating starch → CBC starch → high speed and low speed → blue dye → purple dye → water repellent → lubricant → caustic soda → latex → stopping the stirrer, and ending the process;
2) the start program of the intermediate coating: (addition) GCC-65 → low speed stirring for 1 minute → high speed stirring → foam inhibitor → 1# china clay → dispersant, clear water → thickener → coating starch → CBC starch → high speed low speed stirring → blue dye → purple dye → water repellent → lubricant → caustic soda → latex → stop the stirrer, and the procedure is finished;
3) the surface coating paint starting program comprises the following steps: adding GCC-95 → stirring at low speed for 1 minute → stirring at high speed → foam inhibitor → 1# china clay → dispersant, clear water → high speed stirring at low speed → water repellent → lubricant → caustic soda → latex → VAE latex → rheological agent → stopping the stirrer, and sampling to test the solid content, viscosity, PH value and temperature of the coating. And → the addition amount of the supplemented blue and purple dyes is adjusted again according to the ab value of the finished paper → the stirrer is started to stir at low speed → the blue dye → the purple dye → the stirring and dispersing are carried out for 5min, the program operation is stopped → the low-speed rotation and high-speed rotation → the thickener → the stirrer is stopped, and the paint solid content, the viscosity, the PH value and the temperature are sampled and tested. And → the addition amount of the replenished blue and purple dyes is adjusted according to the ab value of the finished paper → the stirrer is started to stir at low speed → the blue dyes → the purple dyes → the program operation is stopped after stirring and dispersing for 5 min.
3. The process of claim 2 for converting normal production of paper color without changing line,
in step 10, the coating machine coating process is as follows:
1) pre-coating and coating machine-arranging flow: coating preparation → sampling detection → coating storage tank → vibrating screen → feed tank → pressure screen → coating feeding tray → scraper coating → reflux coarse screen → feed tank → continuous circulation feeding when production is normal;
2) the process of the floating coat coating machine comprises the following steps: coating preparation → sampling detection → coating storage tank → vibrating screen → feed tank → pressure screen → coating feeding tray → scraper coating → reflux coarse screen → feed tank → continuous circulation feeding when production is normal;
3) the top coating and coating process comprises the following steps: coating preparation → sampling detection → coating storage tank → vibrating screen → feed tank → pressure screen → coating feeding tray → scraper coating → reflux vibrating screen → feed tank → continuous circulation feeding when production is normal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010129495.3A CN111270558A (en) | 2020-02-28 | 2020-02-28 | Normal production conversion process without changing paper surface color |
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| CN202010129495.3A CN111270558A (en) | 2020-02-28 | 2020-02-28 | Normal production conversion process without changing paper surface color |
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Cited By (3)
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| CN115075049A (en) * | 2022-07-08 | 2022-09-20 | 东莞建晖纸业有限公司 | Coating for coating kraft liner board and preparation method thereof |
| CN115748289A (en) * | 2023-01-03 | 2023-03-07 | 陕西东方环保产业集团东鹏再生资源利用有限公司 | Method for improving paper seed changing efficiency in papermaking |
| CN115976874A (en) * | 2022-11-30 | 2023-04-18 | 东莞建晖纸业有限公司 | Method for on-line mutual production conversion of four-layer grey-base-coated white board and five-layer grey-base-coated white board |
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| CN115075049A (en) * | 2022-07-08 | 2022-09-20 | 东莞建晖纸业有限公司 | Coating for coating kraft liner board and preparation method thereof |
| CN115976874A (en) * | 2022-11-30 | 2023-04-18 | 东莞建晖纸业有限公司 | Method for on-line mutual production conversion of four-layer grey-base-coated white board and five-layer grey-base-coated white board |
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