CN111549561A - Method for producing multilayer light high-strength corrugated paper - Google Patents
Method for producing multilayer light high-strength corrugated paper Download PDFInfo
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- CN111549561A CN111549561A CN202010352858.XA CN202010352858A CN111549561A CN 111549561 A CN111549561 A CN 111549561A CN 202010352858 A CN202010352858 A CN 202010352858A CN 111549561 A CN111549561 A CN 111549561A
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
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Abstract
The production method of the multilayer light high-strength corrugated paper comprises the following steps: grading the long and short fibers by a grading sieve, and distributing and sizing the long fiber pulp and the short fiber pulp in proportion by respectively passing the graded pulp through a concentration thermal dispersion system; the pulp enters the net part, two layers of pulp are formed in the net part, spray starch is added, the wet paper with the net surface removed is led to a space between two rollers with felt, the wet paper is further dehydrated, and the paper is compact; the paper material enters a front drying device, and the paper material passes through the surfaces of a plurality of cylinders internally filled with hot steam to dry the paper; the paper enters a sizing machine, and a metering rod sizing machine is adopted to realize accurate sizing control; feeding the paper stock into a post-drying device; and (4) feeding the paper stock into a curling device to wind the paper stock. The production method of the multilayer light high-strength corrugated paper can greatly improve the strength, the moisture resistance and the water resistance of the corrugated paper, improve the dryness of a paper web outlet part, reduce the steam consumption of a drying part and improve the running efficiency of a paper machine.
Description
Technical Field
The invention relates to the technical field of papermaking, in particular to a method for producing multilayer light high-strength corrugated paper.
Background
In modern society, people pay more and more attention to the packaging of commodities, and modern society has product mass production everyday, and along with the production of these products, it needs better extranal packing in order to guarantee in the transportation or the sale storage process that the quality of product can not receive external destruction simultaneously. On the one hand, as the cost of raw materials rises, particularly the price of base paper which accounts for a high proportion of the production cost of the carton rises again, the cost of carton enterprises is increased more; on the other hand, the national requirements on environmental protection and green recycling economy are further deepened, and the corrugated paper box is mainly designed by low-gram-weight and high-strength corrugated paper in most advanced countries such as Europe and America at present. For the carton industry in China, "low gram weight and high strength" is a development stage which is inevitably experienced, because the production cost of enterprises can be further reduced, and the requirements of economic sustainable development in China are met.
For the most part, the outer packaging of the products is generally protectively packed by means of cartons made of corrugated cardboard. Therefore, a good corrugated board is of great importance for manufacturing a carton with better service performance, and a corrugated base paper with ideal quality needs to be manufactured for manufacturing a good corrugated board, while the existing single-layer corrugated base paper is difficult to meet the requirements of packaging cartons with high requirements on the performances of compressive strength, wear resistance, tearing resistance and the like. With the rapid development of production technology, the speed of a paper machine is faster and faster, corrugated paper is developed towards light weight, production raw materials of corrugated base paper mainly use recycled waste paper, the performance of the raw materials is poor, the dehydration capacity of a single-layer forming net cannot meet production requirements, so that the dryness of a paper web outlet pressing part is low, the strength is poor, paper breakage is easy to occur, and the speed of the paper machine cannot be improved.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a method for producing multilayer light high-strength corrugated paper, which improves the dehydration capacity of pulp, greatly improves the dryness of paper webs at a wire outlet part, reduces the paper breaking times of a paper machine and improves the running rate of the paper machine. The specific technical scheme is as follows:
the production method of the multilayer light high-strength corrugated paper comprises the following steps:
classifying the long and short fibers by a classifying screen, respectively passing the classified slurry through a concentration thermal dispersion system to enable the slurry to have proper beating degree, and distributing and sizing the long fiber slurry and the short fiber slurry according to a proportion;
the pulp enters the net part, two layers of pulp in the net part are used for forming, spray starch is added, the interlayer binding force of the corrugated paper is improved, the pressure of the composite roller on the paper web is used, the pulp is uniformly distributed in the net part, the dryness of the net part is improved, and the binding force of the surface bottom layer is high;
the paper material enters a squeezing part, the wet paper with the net surface removed is guided between two rollers with felts, the wet paper is further dehydrated by the squeezing of the rollers and the water absorption of the felts, and the paper material is tighter, so that the paper surface is improved, and the strength is increased;
the paper material enters a front drying device, and the paper material passes through the surfaces of a plurality of cylinders internally filled with hot steam to dry the paper;
the paper enters a sizing machine, and a metering rod sizing machine is adopted, so that the sizing is accurately controlled, and the moisture-proof and water-resistant performance of the corrugated paper is improved;
the paper enters a post-drying device to further reduce the moisture content of the paper;
and (4) feeding the paper stock into a curling device to wind the paper stock.
The following is an attached technical solution of the present invention.
Preferably, the concentration of the slurry is 0.1-1.2%.
Preferably, the dryness of the stock when it exits the couch roll at the wire section is 15-25%.
Preferably, the dryness of the paper stock is 92-95% after the paper stock is dried by the post-drying device.
Preferably, the press roll of the press section is encapsulated in the form of blind holes and grooves.
Preferably, the rubber coating is made of polyurethane, so that the wear resistance is improved.
Preferably, in the sizing machine, the sizing amount of each surface of the paper is 1.0-2.0 g/m 2.
Preferably, the diameter of the sizing metering rod is 15 mm.
Preferably, the paper stock is processed by a sizing machine, then is calendered, and is pressed by an upper roller and a lower roller.
Preferably, the slurry has a dry strength agent therein.
The invention has the technical effects that: the production method of the multilayer light high-strength corrugated paper can greatly improve the strength, the moisture resistance and the water resistance of the corrugated paper, improve the dryness of a paper web outlet part, reduce the steam consumption of a drying part and improve the running efficiency of a paper machine.
Detailed Description
The essential features and advantages of the invention will be further explained below with reference to examples, but the invention is not limited to the examples listed.
The production method of the multilayer light high-strength corrugated paper comprises the following steps: classifying the long and short fibers by a classifying screen, respectively passing the classified slurry through a concentration thermal dispersion system to enable the slurry to have proper beating degree, and distributing and sizing the long fiber slurry and the short fiber slurry according to a proportion; the material enters the net part, two layers of pulp in the net part are used for forming, spray starch is added, the interlayer binding force of the corrugated paper is improved, the pressure of the composite roller on the paper web is used, the pulp is uniformly distributed in the net part, the dryness of the net part is improved, and the binding force of the surface bottom layer is high; the paper material enters a squeezing part, the wet paper with the net surface removed is guided between two rollers with felts, the wet paper is further dehydrated by the squeezing of the rollers and the water absorption of the felts, and the paper material is tighter, so that the paper surface is improved, and the strength is increased; the paper material enters a front drying device, and the paper material passes through the surfaces of a plurality of cylinders internally filled with hot steam to dry the paper; the paper enters a sizing machine, and a metering rod sizing machine is adopted, so that the sizing is accurately controlled, and the moisture-proof and water-resistant performance of the corrugated paper is improved; the paper enters a post-drying device to further reduce the moisture content of the paper; and (4) feeding the paper stock into a curling device to wind the paper stock. Among the above-mentioned technical scheme, the portion of the net adopts two-layer thick liquids to replace original individual layer thick liquids to take shape, makes the portion of the net thick liquids distribute more evenly, improves the cohesion between the paper web layer, makes the sizing agent of surfing the net form the wet paper web that has good uniformity and physical properties, reduces the paper web probability of paper break, reduces the steam consumption of drying portion. By adopting an accurate surface sizing technology, sizing materials are metered by a metering rod and then transferred to a paper surface through a sizing roller, and the sizing amount can be adjusted by adjusting the pressure of the metering rod, the surface sizing concentration, the speed of the sizing roller and the like, so that the sizing effect is better, the sizing is more balanced, the probability of paper breakage is reduced, the difference between two surfaces is reduced, and the glue consumption is reduced. A proper amount of spray starch is used, so that the interlayer binding force is improved; the dryness of the surface and bottom layer slurry during compounding is controlled by adjusting the vacuum degree of the surface and bottom layer, the pressure of a compounding roller is adjusted, the corrugated paper surface is ensured to be even and flat, and the interlayer binding force is improved to the maximum extent.
In the embodiment, the concentration of the slurry is 0.1-1.2%, so that the quality of the corrugated paper is improved.
In this embodiment, the dryness of the stock is 15-25% when the stock exits the couch roll at the wire section, thereby preventing the moisture content of the stock from being too high.
In this embodiment, after the paper material is dried by the post-drying device, the dryness of the paper material is 92 to 95%, so as to further reduce the water content of the paper material.
In this embodiment, the press roll of the press section is encapsulated in blind holes and grooves. The blind hole groove type rubber coating increases the water containing space and the water throwing efficiency of the press roll, is beneficial to improving the dryness of paper materials and increasing the stability of a paper machine.
In this embodiment, the encapsulation is a polyurethane material, thereby improving wear resistance.
In the embodiment, the size of each surface of the paper in the size press is 1.0-2.0 g/m2。
In this example, the sizing metering rod diameter was 15 mm.
In the embodiment, the paper is press polished after being processed by the sizing machine, the paper reaches the required tightness through the pressurization of the upper roller and the lower roller, and a certain modification effect is realized on the paper surface.
In the embodiment, the slurry is provided with the dry strength agent, so that the length resistance and the bursting strength of the paper are improved.
By the technical scheme, the performance parameters of the corrugated paper obtained by the production method are as follows:
(1) high finished paper tightness not less than 0.53g/cm, high breaking length not less than 4.0Km, water content 8 +/-2%, and water absorption degree on front and back surfaces not more than 50/70 g/m2；
(2) The paper breaking frequency of the paper machine is reduced by 20 percent, and the monthly running rate is improved by 0.8 percent;
(3) the dryness of the paper web at the net part is improved by 3 percent, the steam consumption at the drying part is reduced, and the steam unit consumption is reduced by 8 percent. The energy consumption of unit products of a main production system is reduced to 220kgce/t, and the requirements of advanced values specified in national standard 'energy consumption limit of pulping and papermaking unit products' GB31825-2015 are met. The energy consumption of unit products reaches the leading level of international clean production.
The production method of the multilayer light high-strength corrugated paper can greatly improve the strength, moisture resistance and water resistance of the corrugated paper, improve the dryness of a paper web outlet part, reduce the steam consumption of a drying part and improve the running efficiency of a paper machine.
It should be noted that the above-mentioned preferred embodiments are merely illustrative of the technical concepts and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. The production method of the multilayer light high-strength corrugated paper is characterized by comprising the following steps:
classifying the long and short fibers by a classifying screen, respectively passing the classified slurry through a concentration thermal dispersion system to enable the slurry to have proper beating degree, and distributing and sizing the long fiber slurry and the short fiber slurry according to a proportion;
the pulp enters the net part, two layers of pulp in the net part are used for forming, spray starch is added, the interlayer binding force of the corrugated paper is improved, the pressure of the composite roller on the paper web is used, the pulp is uniformly distributed in the net part, the dryness of the net part is improved, and the binding force of the surface bottom layer is high;
the paper material enters a squeezing part, the wet paper with the net surface removed is guided between two rollers with felts, the wet paper is further dehydrated by the squeezing of the rollers and the water absorption of the felts, and the paper material is tighter, so that the paper surface is improved, and the strength is increased;
the paper material enters a front drying device, and the paper material passes through the surfaces of a plurality of cylinders internally filled with hot steam to dry the paper;
the paper enters a sizing machine, and a metering rod sizing machine is adopted, so that the sizing is accurately controlled, and the moisture-proof and water-resistant performance of the corrugated paper is improved;
the paper enters a post-drying device to further reduce the moisture content of the paper;
and (4) feeding the paper stock into a curling device to wind the paper stock.
2. A method of producing multi-layer light high strength corrugated paper as claimed in claim 1 wherein the concentration of the size is 0.1-1.2%.
3. A process for making multi-ply, light-weight, high-strength corrugated paper as claimed in claim 2, wherein the stock has a dryness of 15-25% as it exits the couch roll at the wire portion.
4. A process for making multi-ply, light-weight, high strength corrugated paper as claimed in claim 3 wherein the stock is dried by a post-dryer to a dryness of 92 to 95%.
5. The method for producing multi-layer light-weight high-strength corrugated paper as claimed in claim 4, wherein the press rolls of the press section are encapsulated in blind holes and grooves.
6. The method of producing multi-layer lightweight high strength corrugated paper as set forth in claim 5 wherein said encapsulation is a polyurethane material to enhance abrasion resistance.
7. The method for producing multi-layer light-weight high-strength corrugated paper as claimed in claim 6, wherein the size of each surface of the paper in the size press is 1.0-2.0 g/m2。
8. The process for producing multi-ply, light-weight, high-strength corrugated paper as recited in claim 7, wherein the size press metering bar has a diameter of 15 mm.
9. A method for producing multi-layer light high-strength corrugated paper as recited in claim 8, wherein the paper stock is calendered after being processed by the size press and pressed by the upper and lower rollers.
10. The method of producing multi-layer light weight, high strength corrugated paper as recited in claim 9, wherein the slurry includes a dry strength agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010352858.XA CN111549561A (en) | 2020-04-29 | 2020-04-29 | Method for producing multilayer light high-strength corrugated paper |
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| CN202010352858.XA CN111549561A (en) | 2020-04-29 | 2020-04-29 | Method for producing multilayer light high-strength corrugated paper |
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Citations (6)
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|---|---|---|---|---|
| WO1999015331A1 (en) * | 1997-09-23 | 1999-04-01 | Fibermark, Inc. | Microsphere-containing circuit board paper |
| CN103321088A (en) * | 2013-07-19 | 2013-09-25 | 吉安集团股份有限公司 | Renewable high-strength corrugated medium and its production method |
| CN104278594A (en) * | 2013-07-08 | 2015-01-14 | 浙江荣晟环保纸业股份有限公司 | Bobbin paper production technology |
| CN108505372A (en) * | 2018-04-04 | 2018-09-07 | 浙江荣晟环保纸业股份有限公司 | A method of producing the low special craft paper of gram weight and high strength degree electric business using domestic waste paper |
| CN109056406A (en) * | 2018-08-10 | 2018-12-21 | 南京林业大学 | High-grade T cardboard and its production method |
| CN109837799A (en) * | 2019-03-11 | 2019-06-04 | 南京林业大学 | A kind of preparation method improving low grammes per square metre T cardboard ring crush intensity |
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2020
- 2020-04-29 CN CN202010352858.XA patent/CN111549561A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999015331A1 (en) * | 1997-09-23 | 1999-04-01 | Fibermark, Inc. | Microsphere-containing circuit board paper |
| CN104278594A (en) * | 2013-07-08 | 2015-01-14 | 浙江荣晟环保纸业股份有限公司 | Bobbin paper production technology |
| CN103321088A (en) * | 2013-07-19 | 2013-09-25 | 吉安集团股份有限公司 | Renewable high-strength corrugated medium and its production method |
| CN108505372A (en) * | 2018-04-04 | 2018-09-07 | 浙江荣晟环保纸业股份有限公司 | A method of producing the low special craft paper of gram weight and high strength degree electric business using domestic waste paper |
| CN109056406A (en) * | 2018-08-10 | 2018-12-21 | 南京林业大学 | High-grade T cardboard and its production method |
| CN109837799A (en) * | 2019-03-11 | 2019-06-04 | 南京林业大学 | A kind of preparation method improving low grammes per square metre T cardboard ring crush intensity |
Non-Patent Citations (3)
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| 张美云: "《造纸技术》", 31 January 2014, 北京：中国轻工业出版社 * |
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Application publication date: 20200818 |