CN111021129A - Cardboard paper and preparation process thereof - Google Patents
Cardboard paper and preparation process thereof Download PDFInfo
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- CN111021129A CN111021129A CN201911135644.0A CN201911135644A CN111021129A CN 111021129 A CN111021129 A CN 111021129A CN 201911135644 A CN201911135644 A CN 201911135644A CN 111021129 A CN111021129 A CN 111021129A
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- Prior art keywords
- paper
- pulp
- sizing
- emulsion
- succinic anhydride
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- 239000000123 paper Substances 0.000 title claims abstract description 100
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000011111 cardboard Substances 0.000 title claims abstract description 9
- 238000004513 sizing Methods 0.000 claims abstract description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 49
- -1 alkenyl succinic anhydride Chemical compound 0.000 claims abstract description 32
- 238000001035 drying Methods 0.000 claims abstract description 32
- 229940014800 succinic anhydride Drugs 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 27
- 229920002472 Starch Polymers 0.000 claims abstract description 18
- 239000008107 starch Substances 0.000 claims abstract description 18
- 235000019698 starch Nutrition 0.000 claims abstract description 18
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 8
- 239000000839 emulsion Substances 0.000 claims description 28
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 19
- HXHCOXPZCUFAJI-UHFFFAOYSA-N prop-2-enoic acid;styrene Chemical group OC(=O)C=C.C=CC1=CC=CC=C1 HXHCOXPZCUFAJI-UHFFFAOYSA-N 0.000 claims description 18
- 239000003995 emulsifying agent Substances 0.000 claims description 17
- 230000008569 process Effects 0.000 claims description 16
- 229920002261 Corn starch Polymers 0.000 claims description 15
- 239000008120 corn starch Substances 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 15
- 238000004537 pulping Methods 0.000 claims description 11
- 239000002002 slurry Substances 0.000 claims description 11
- 125000002091 cationic group Chemical group 0.000 claims description 8
- 230000018044 dehydration Effects 0.000 claims description 5
- 238000006297 dehydration reaction Methods 0.000 claims description 5
- 239000010791 domestic waste Substances 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 20
- 239000000835 fiber Substances 0.000 abstract description 19
- 239000003795 chemical substances by application Substances 0.000 abstract description 5
- 239000003292 glue Substances 0.000 description 10
- 239000000203 mixture Substances 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 238000005498 polishing Methods 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000011087 paperboard Substances 0.000 description 5
- 229920001131 Pulp (paper) Polymers 0.000 description 4
- 241000274582 Pycnanthus angolensis Species 0.000 description 4
- 229920000881 Modified starch Polymers 0.000 description 3
- 239000004368 Modified starch Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 238000010411 cooking Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 235000019426 modified starch Nutrition 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- 238000003892 spreading Methods 0.000 description 3
- 230000007480 spreading Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/24—Polysaccharides
- D21H17/28—Starch
- D21H17/29—Starch cationic
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/06—Paper forming aids
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/16—Sizing or water-repelling agents
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
Landscapes
- Paper (AREA)
Abstract
A cardboard paper and a preparation process thereof. The invention adopts the alkenyl succinic anhydride sizing agent in the pulp, the starch and the surface sizing auxiliary agent and the corresponding process steps, so that the alkenyl succinic anhydride can be well spread on the surface of the fiber, the water content in the fiber is reduced, the heat conduction efficiency of the drying cylinder is effectively improved, the steam consumption of the drying cylinder of the drying part is reduced, and the operation cost is saved. Meanwhile, the using amount of starch and surface sizing auxiliaries is reduced, the stability of the paper machine is improved, and the prepared cardboard paper is low in water absorption, good in paper surface flatness, stable in operation and low in overall cost.
Description
Technical Field
The invention relates to the technical field of papermaking, in particular to boxboard paper and a preparation process thereof.
Background
The water absorption of the paper sheet refers to the physical property of the paper sheet capable of absorbing water in water, and is an important measure in the physical indexes of the paper sheet. The surface sizing for papermaking is an important means for reducing the water absorption and is an indispensable important working section in the papermaking process, so that the operation cost of a sizing machine is reduced, the sizing quality is improved, and the normal operation of production is ensured; dip-sizing has its own limitations: the paper sheet has large glue absorption amount and serious rewetting, causes large water content and high vehicle speed of the paper sheet, easily causes the breakage of the paper sheet at the glue surface position and the difficulty of joint due to the fact that the tension can not be pulled up when the paper sheet is broken and the speed of the paper machine is seriously influenced and a product with low gram weight is produced. The film transfer sizing is generally used for imported high-speed paper machines, and has the advantages of controllable sizing amount, less sizing amount, surface sizing starch consumption saving, less rewetting of paper sheets at sizing positions, good control of paper sheet tension, less broken ends of the paper sheets at the surface sizing positions and easy connection of broken paper joints, is favorable for improving the speed of a vehicle and producing finished products with low gram weight, and ensures that the product diversity meets the market requirements.
In the production process of the cardboard paper, the raw materials are regenerated resource waste paper which is recycled at home and abroad, the pulp contains a large amount of starch, stickies, sand grains, fiber nodes and the like, the local abrasion of a paste rod of the metering rod is easy to cause by film transfer sizing, the sizing is uneven, the cost of the sizing auxiliary agent is increased due to the large horizontal-width local water absorption of paper sheets, the frequency of replacing the metering rod is increased, the hanging glue amount of a new metering rod is large, the starch consumption is large, and the consumption of post-drying steam is large. The stickies and fiber knots are easy to flocculate, which causes various defects of low running rate of the paper machine, paper breakage, more paper breakage, low paper surface flatness and the like. Meanwhile, the pulp contains a large amount of fiber bundles, and gaps exist among fibers, so that the papermaking paper has large glue hanging amount and large steam consumption for steam of finished paper.
Disclosure of Invention
Therefore, a process method suitable for producing the cardboard paper by the high-speed paper machine is needed, so that the prepared cardboard paper is low in water absorption, good in paper surface flatness, stable in running of the paper machine and low in overall cost.
In order to achieve the above object, in a first aspect of the present invention, the inventors provide a process for preparing linerboard paper, comprising the steps of pulping, preparing pulp, and making paper by a high-speed paper machine, wherein the step of making paper by the high-speed paper machine comprises adding an emulsion at 90-95 ℃ into the pulp before the pulp flows into a pulp pump of the paper machine, the emulsion is prepared by adding water into alkenyl succinic anhydride and an emulsifier, the emulsifier is cationic starch, and the mass ratio of the alkenyl succinic anhydride, the emulsifier and the water is 4-6: 3-5: 220-280;
the high-speed paper machine manufacturing step comprises the steps of wire part dehydration forming, squeezing of a squeezing part, drying of a front drying part, sizing by a sizing machine, drying of a rear drying part, reeling, rewinding, packaging and warehousing;
in the sizing step of the sizing machine, corn starch is adopted for surface sizing, and styrene acrylic acid and aluminum sulfate are used as auxiliaries.
Further, the addition amount of the emulsion is 1-2 kg/ton pulp.
Further, the emulsion is added to the slurry within 1min of preparation.
Further, the pH value of the emulsion is 8.5-9.0.
Furthermore, in the sizing step of the sizing machine, the addition amount of the corn starch is 2-5 kg/ton of paper pulp, the addition amount of the styrene acrylic acid is 0-6 kg/ton of paper pulp, and the addition amount of the aluminum sulfate is 0-6 kg/ton of paper pulp.
Further, the main component of the paper pulp is domestic waste OCC recycled pulp.
Further, the mass ratio of the alkenyl succinic anhydride to the emulsifier to the water is 5: 4: 250.
in a second aspect of the present invention, the inventors provide a linerboard produced by the production process of the first aspect of the present invention.
Different from the prior art, the technical scheme adopts the alkenyl succinic anhydride sizing agent in the pulp, matched with the starch and the surface sizing auxiliary agent and matched with corresponding process steps, so that the alkenyl succinic anhydride can be well spread on the surface of the fiber, the water content in the fiber is reduced, the heat conduction efficiency of the drying cylinder is effectively improved, the steam consumption of the drying cylinder of the drying part is reduced, and the operation cost is saved. Meanwhile, the using amount of starch and surface sizing auxiliaries is reduced, the stability of the paper machine is improved, and the prepared cardboard paper is low in water absorption, good in paper surface flatness, stable in operation and low in overall cost.
Detailed Description
In order to explain technical contents, structural features, and objects and effects of the technical means in detail, the following detailed description is given with reference to specific embodiments.
The purpose of sizing is to impart to the paper or paperboard the ability to resist the diffusion and penetration of liquids, particularly water and aqueous solutions. Surface sizing refers to a process in which a wet paper web is dewatered to a predetermined value by a drying section, and then an appropriate size is uniformly applied to the surface of the paper web.
The domestic OCC slurry for producing bobbin paper described in the present embodiment is produced by using grade a paper or grade B paper in the following table as raw materials of the domestic OCC slurry, and the types and definition of the domestic OCC raw materials are as follows:
wherein the sundries are not paper articles and non-utilizable paper articles
The speed of the high-speed paper machine used in the present embodiment is 800m/min or more.
Example 1
A preparation process of boxboard paper comprises the steps of pulping, preparing pulp and manufacturing by a high-speed paper machine,
pulping: pulping, coarse screening, primary classifying screen, secondary classifying screen, heavy deslagging, light deslagging, multi-disc, heat dispersion and disc grinding to obtain raw material pulp.
Preparing slurry:
100% of domestic waste OCC slurry.
Preparing an emulsion:
the modified starch is prepared by adding water to Alkenyl Succinic Anhydride (ASA) and a cationic starch emulsifier, wherein the mass ratio of the alkenyl succinic anhydride to the emulsifier to the water is 5: 4: 250.
the preparation process comprises the following steps: adding clear water into a dissolving tank to 80% of the liquid level, starting a stirrer, and then adding the clear water into the dissolving tank until the volume of the dissolving tank is 5: 4: 250, adding Alkenyl Succinic Anhydride (ASA) and a cationic starch emulsifier into the mixture, stirring the mixture for 10 minutes after the addition of the mixture is finished, pumping the mixture into a cooking tank for heating for 25 minutes, controlling the heating rate to be 2-4 ℃/min and controlling the final temperature to be 95 ℃. The emulsion is pumped into a storage tank for use after the temperature of the emulsion is raised to 95 ℃, and the pH value of the emulsion is 8.5-9.0.
Adding 95 ℃ emulsion into raw pulp before the inlet of a sizing pump of a paper machine, wherein the addition amount is 1 kg/ton pulp, and the emulsion is used within 1min after preparation.
Manufacturing by a high-speed paper machine:
the method comprises the steps of wire part dehydration forming, squeezing of a squeezing part, drying of a front drying part, glue applying of a glue applicator, drying of a rear drying part, press polishing of a press polishing machine, reeling, rewinding, packaging and warehousing.
In the sizing step of the sizing machine, corn starch is used for sizing, and the auxiliary agents are styrene acrylic acid and aluminum sulfate.
The initial adding amount of the corn starch is 5 kg/ton of pulp, the initial adding amount of the styrene acrylic acid is 6 kg/ton of pulp, and the initial adding amount of the aluminum sulfate is 6 kg/ton of pulp.
The sizing of the paper sheet is mainly determined by 3 sub-processes: 1) retention of sizing particles on the surface of the fibers and fillers; 2) spreading and redistributing the sizing material on the surfaces of the fibers and the fillers; 3) the sizing material is fixed on the surfaces of the fibers and the filler. For good sizing, it is necessary to ensure good spreading of the Alkenyl Succinic Anhydride (ASA) on the surface of the fibers. The alkenyl succinic anhydride is oily liquid at room temperature, the existence of water is very important for the spreading of the alkenyl succinic anhydride on the surface of the fiber, and the alkenyl succinic anhydride coated with a water film can more easily obtain wide coverage on the surface of the fiber. And the alkenyl succinic anhydride exists on the surface of the paper sheet in the form of small blocks or wrapped small blocks, the driving force is the interfacial tension between the fibers and the alkenyl succinic anhydride and between the fibers and water, and the alkenyl succinic anhydride can effectively combine free water and combined water in the fiber bundles, so that the water content in the fibers is reduced, the heat conduction efficiency of the drying cylinder can be effectively improved, the steam consumption of the drying cylinder of the drying part is reduced, and the operation cost is saved.
After paper is fed, sampling is carried out, the water absorption of the finished paper is detected, the alkenyl succinic anhydride sizing agent does not need to be cured, so that the water absorption is detected without drying, the using amount of the corn starch is slowly reduced according to the water absorption detection value until the finished paper is stopped, and the alkenyl succinic anhydride sizing agent belongs to neutral sizing, so that the auxiliary agents of styrene acrylic acid and aluminum sulfate which are matched with the corn starch are also stopped. Meanwhile, the dosage of alkenyl succinic anhydride can be adjusted according to the water absorption capacity of the finished paper.
The water absorption of the finished paper requires 50/50 on the front and back sides, after ASA is added, the water absorption 40/40 reduces the use level of starch, styrene acrylic acid and aluminum sulfate gradually, in the reducing process, the water absorption of the finished paper is kept to be lower than 50/50, and when the use level of the styrene acrylic acid and the aluminum sulfate is lower than 1 kilogram of paper, the corn starch, the styrene acrylic acid and the aluminum sulfate are directly stopped.
The method ensures that the finished paper has good water absorption stability, does not generate large fluctuation and reduces the sizing cost; after ASA slurry is used for internal sizing, surface sizing aluminum sulfate is universal, the surface sizing metering rod cannot be pasted, the service life of the metering rod is prolonged from one day to five days, the water absorption is good, the surface sizing concentration is properly reduced, and the surface sizing starch dosage and the steam dosage are reduced.
1. The cost accounting after the development of ASA is replaced by the cost accounting after the development of the ASA: 1) the dosage of ASA per ton of paper is 1.5KG, the unit price is 15000 yuan/ton, the cost per ton of paper is 22.5 yuan, 2) the unit consumption of styrene acrylic acid per ton of paper is 6KG, the unit price is 5000 yuan/ton, the cost per ton of paper is 30 yuan, 3) the unit consumption of aluminum sulfate per ton of paper is 6KG, the unit price is 400 yuan/ton, and the cost per ton of paper is 2.4 yuan. From the above data it can be seen that the cost savings of 9.9 dollars per ton of paper is achieved using ASA instead of surface sizing agents with styrene acrylic acid and aluminum sulfate.
2. The unit consumption of starch per ton of paper is reduced by 12KG/T of paper, the unit price is 2650 yuan/ton, and 31.8 yuan is saved per ton of paper.
3. The steam consumption per ton of paper is reduced by 0.15T/T paper, the unit price is 113.7 yuan/ton, and 17.1 yuan is saved per ton of paper.
4. After the service cycle of the metering rods is prolonged, 4700 yuan of metering rods are saved by 48 metering rods per month, 23000 tons of paper are produced by a paper machine per month, and 9.8 yuan of metering rods are saved by each ton of paper.
The process saves 68.6 yuan per ton of paper, indirectly interrupts the replacement and measurement when the water absorption is large, and causes the paper breaking by the adjustment of the sizing machine, thereby improving the running rate of the paper machine.
Example 2
A preparation process of boxboard paper comprises the steps of pulping, preparing pulp and manufacturing by a high-speed paper machine,
pulping: pulping, coarse screening, primary classifying screen, secondary classifying screen, heavy deslagging, light deslagging, multi-disc, heat dispersion and disc grinding to obtain raw material pulp.
Preparing slurry:
100% of domestic waste OCC slurry.
Preparing an emulsion:
the modified starch is prepared by adding water to Alkenyl Succinic Anhydride (ASA) and a cationic starch emulsifier, wherein the mass ratio of the alkenyl succinic anhydride to the emulsifier to the water is 4: 3: 220.
the preparation process comprises the following steps: adding clear water into a dissolving tank to 80% of the liquid level, starting a stirrer, and then adding the clear water into the dissolving tank until the volume of the dissolving tank is 4: 3: 220, adding Alkenyl Succinic Anhydride (ASA) and a cationic starch emulsifier, stirring for 10 minutes after adding the materials, pumping the materials into a cooking tank for heating for 20 minutes, controlling the heating rate at 2-4 ℃/min and the final temperature at 90 ℃. The emulsion is pumped into a storage tank for use after the temperature of the emulsion is raised to 90 ℃, and the pH value of the emulsion is 8.5-9.0.
Before the inlet of a sizing pump of a paper machine, adding 90 ℃ emulsion into raw pulp, wherein the addition amount is 1 kg/ton pulp, and the emulsion is used within 1min after preparation.
Manufacturing by a high-speed paper machine:
the method comprises the steps of wire part dehydration forming, squeezing of a squeezing part, drying of a front drying part, glue applying of a glue applicator, drying of a rear drying part, press polishing of a press polishing machine, reeling, rewinding, packaging and warehousing.
In the sizing step of the sizing machine, corn starch is used for sizing, and the auxiliary agents are styrene acrylic acid and aluminum sulfate.
The initial adding amount of the corn starch is 3 kg/ton of pulp, the initial adding amount of the styrene acrylic acid is 5 kg/ton of pulp, and the initial adding amount of the aluminum sulfate is 5 kg/ton of pulp.
According to the water absorption detection value, the use amounts of the corn starch, the styrene acrylic acid and the aluminum sulfate are slowly reduced until the use is stopped.
Example 3
A preparation process of boxboard paper comprises the steps of pulping, preparing pulp and manufacturing by a high-speed paper machine,
pulping: pulping, coarse screening, primary classifying screen, secondary classifying screen, heavy deslagging, light deslagging, multi-disc, heat dispersion and disc grinding to obtain raw material pulp.
Preparing slurry:
100% of domestic waste OCC slurry.
Preparing an emulsion:
the modified starch is prepared by adding water to Alkenyl Succinic Anhydride (ASA) and a cationic starch emulsifier, wherein the mass ratio of the alkenyl succinic anhydride to the emulsifier to the water is 6: 5: 280.
the preparation process comprises the following steps: adding clean water into a dissolving tank to 70% of the liquid level, starting a stirrer, and then mixing the clean water and the olefin succinic anhydride in a ratio of 6: 5: 280, adding Alkenyl Succinic Anhydride (ASA) and a cationic starch emulsifier into the mixture, stirring the mixture for 10 minutes after the addition of the materials is finished, pumping the mixture into a cooking tank for heating for 25 minutes, controlling the heating rate to be 2-4 ℃/min and controlling the final temperature to be 90 ℃. The emulsion is pumped into a storage tank for use after the temperature of the emulsion is raised to 90 ℃, and the pH value of the emulsion is 8.5-9.0.
Before the inlet of a sizing pump of a paper machine, adding 90 ℃ emulsion into raw pulp, wherein the addition amount is 2 kg/ton pulp, and the emulsion is used within 1min after preparation.
Manufacturing by a high-speed paper machine:
the method comprises the steps of wire part dehydration forming, squeezing of a squeezing part, drying of a front drying part, glue applying of a glue applicator, drying of a rear drying part, press polishing of a press polishing machine, reeling, rewinding, packaging and warehousing.
In the sizing step of the sizing machine, corn starch is used for sizing, and the auxiliary agents are styrene acrylic acid and aluminum sulfate.
The initial adding amount of the corn starch is 2 kg/ton of pulp, the initial adding amount of the styrene acrylic acid is 4 kg/ton of pulp, and the initial adding amount of the aluminum sulfate is 4 kg/ton of pulp.
According to the water absorption detection value, the use amounts of the corn starch, the styrene acrylic acid and the aluminum sulfate are slowly reduced until the use is stopped.
The cartons produced in examples 1-3 have the advantages that the alkenyl succinic anhydride can be well spread on the surface of the fiber, the paper surface flatness is good, the paper does not have the conditions of holes and broken paper, the water absorption of the paper is lower than 50/50, and the production cost is lower.
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 terminal 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 terminal. Without further limitation, an element defined by the phrases "comprising … …" or "comprising … …" does not exclude the presence of additional elements in a process, method, article, or terminal that comprises the element. Further, herein, "greater than," "less than," "more than," and the like are understood to exclude the present numbers; the terms "above", "below", "within" and the like are to be understood as including the number.
It should be noted that, although the above embodiments have been described herein, the invention is not limited thereto. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by making changes and modifications to the embodiments described herein or by using equivalent structures or equivalent processes performed in the present specification, and are included in the scope of the present invention.
Claims (8)
1. The preparation process of the linerboard paper comprises the steps of pulping, preparing pulp and manufacturing by using a high-speed paper machine, and is characterized in that the manufacturing step by using the high-speed paper machine comprises the step of adding an emulsion at 90-95 ℃ into the pulp before the pulp flows into a pulp pump of the paper machine, wherein the emulsion is prepared by adding water into alkenyl succinic anhydride and an emulsifier, the emulsifier is cationic starch, and the mass ratio of the alkenyl succinic anhydride, the emulsifier and the water is 4-6: 3-5: 220-280;
the high-speed paper machine manufacturing step comprises the steps of wire part dehydration forming, squeezing of a squeezing part, drying of a front drying part, sizing by a sizing machine, drying of a rear drying part, reeling, rewinding, packaging and warehousing;
in the sizing step of the sizing machine, the surface sizing is carried out by adopting corn starch, and the surface sizing auxiliary agent is styrene acrylic acid and aluminum sulfate.
2. A process according to claim 1, wherein the emulsion is added in an amount of 1-2 kg/ton pulp.
3. The process of claim 1, wherein the emulsion is added to the slurry within 1min of preparation.
4. The process of claim 1, wherein the emulsion has a pH of 8.5 to 9.0.
5. The process according to claim 1, wherein in the sizing step of the size press, the initial addition amount of corn starch is 2-5 kg/ton pulp, the initial addition amount of styrene acrylic acid is 4-6 kg/ton pulp, and the initial addition amount of aluminum sulfate is 4-6 kg/ton pulp.
6. The process according to claim 1, wherein the mass ratio of alkenyl succinic anhydride, emulsifier and water is 5: 4: 250.
7. the process according to claim 1, wherein the main component of the pulp is domestic waste OCC recycled pulp.
8. Cardboard paper, characterized in that it is produced by a process according to any of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911135644.0A CN111021129A (en) | 2019-11-19 | 2019-11-19 | Cardboard paper and preparation process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911135644.0A CN111021129A (en) | 2019-11-19 | 2019-11-19 | Cardboard paper and preparation process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111021129A true CN111021129A (en) | 2020-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911135644.0A Pending CN111021129A (en) | 2019-11-19 | 2019-11-19 | Cardboard paper and preparation process thereof |
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| Country | Link |
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| CN (1) | CN111021129A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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