CN109024058B - Production process of kraft board paper - Google Patents
Production process of kraft board paper Download PDFInfo
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- CN109024058B CN109024058B CN201810915966.6A CN201810915966A CN109024058B CN 109024058 B CN109024058 B CN 109024058B CN 201810915966 A CN201810915966 A CN 201810915966A CN 109024058 B CN109024058 B CN 109024058B
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- 239000000123 paper Substances 0.000 title claims abstract description 84
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 239000002655 kraft paper Substances 0.000 title claims abstract description 20
- 239000002002 slurry Substances 0.000 claims abstract description 77
- 239000010410 layer Substances 0.000 claims abstract description 53
- 239000002344 surface layer Substances 0.000 claims abstract description 33
- 239000010893 paper waste Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000010790 dilution Methods 0.000 claims abstract description 12
- 239000012895 dilution Substances 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 12
- 238000004513 sizing Methods 0.000 claims abstract description 11
- 238000004537 pulping Methods 0.000 claims abstract description 9
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 8
- 238000009826 distribution Methods 0.000 claims abstract description 7
- 238000005507 spraying Methods 0.000 claims abstract description 4
- 239000000835 fiber Substances 0.000 claims description 49
- 238000010009 beating Methods 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000012546 transfer Methods 0.000 claims description 4
- 230000000844 anti-bacterial effect Effects 0.000 claims description 3
- 239000003899 bactericide agent Substances 0.000 claims description 3
- 239000006185 dispersion Substances 0.000 claims description 3
- 239000000975 dye Substances 0.000 claims description 3
- 238000013000 roll bending Methods 0.000 claims description 3
- 239000002518 antifoaming agent Substances 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 238000007666 vacuum forming Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 6
- 230000018044 dehydration Effects 0.000 abstract description 3
- 238000006297 dehydration reaction Methods 0.000 abstract description 3
- 238000003825 pressing Methods 0.000 description 7
- 230000000087 stabilizing effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 1
- 241000196171 Hydrodictyon reticulatum Species 0.000 description 1
- 241000274582 Pycnanthus angolensis Species 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 239000011111 cardboard Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- -1 defoamers Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 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
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/14—Secondary fibres
-
- 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
- D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
- D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
- D21H15/10—Composite fibres
Abstract
The invention relates to a production process of kraft board paper, which comprises the following steps: firstly, pulping OCC waste paper; step two, preparing surface layer slurry and bottom layer slurry by using the OCC waste paper pulp obtained in the step one; thirdly, spraying surface layer slurry and bottom layer slurry together to net on the net by using a double-layer head box of a dilution water screen paper machine with a banner to complete slurry distribution; dewatering the surface layer slurry and the bottom layer slurry in a wire clamping part of the wire clamping paper machine to form a wet paper web; step five, squeezing the wet paper web, and simultaneously increasing the temperature of the wet paper web; and step six, drying and sizing the wet paper web. Compared with the net folding papermaking process, the kraft liner board production process has the advantages that the net part dehydration capacity is higher, the paper forming uniformity is good at high vehicle speed, the papermaking vehicle speed is higher, and the energy is saved.
Description
Technical Field
The invention relates to the field of manufacturing of high-grade kraft liner board paper, in particular to a production process of kraft liner board paper.
Background
In the papermaking industry, a production process for producing high-grade kraft liner board paper generally uses a net folding paper machine for papermaking, a surface forming net, a core forming net and a bottom forming net are independently sized, dewatered and formed to respectively form surface wet paper webs, a core wet paper web and a bottom wet paper web, the surface wet paper web, the core wet paper web and the bottom wet paper web are compounded twice through a surface bottom compound roller and a core bottom compound roller to form a wet paper web, and then the wet paper web enters a squeezing part and a drying part to be made into paper. The running speed of the existing high-speed net folding paper machine for manufacturing kraft liner board paper is usually lower than 1200m/min, and the problem that the dewatering capacity of a net part is insufficient and the forming evenness of the net part is deteriorated due to serious pulp jumping of the net part is faced when the speed is increased.
Disclosure of Invention
Therefore, a production process of kraft liner board paper is needed to solve the problem of further improving the vehicle speed to manufacture high-grade kraft liner boards.
In order to achieve the purpose, the inventor provides a production process of kraft liner board paper, which comprises the following steps:
firstly, pulping OCC waste paper;
step two, preparing surface layer slurry and bottom layer slurry by using the OCC waste paper pulp obtained in the step one;
thirdly, spraying surface layer slurry and bottom layer slurry together to net on the net by using a double-layer head box of a dilution water screen paper machine with a banner to complete slurry distribution;
dewatering the surface layer slurry and the bottom layer slurry in a wire clamping part of the wire clamping paper machine to form a wet paper web;
step five, squeezing the wet paper web, and simultaneously increasing the temperature of the wet paper web;
and step six, drying and sizing the wet paper web.
Further, the OCC waste paper pulping in the first step is screened into short fiber OCC pulp and long fiber OCC pulp.
Further, the short fiber OCC pulp is subjected to deslagging and then is concentrated to form short fiber OCC pulp with the concentration of 4.5% -5.5%.
Further, the long fiber OCC pulp is processed into long fiber OCC pulp with the concentration of 4.0-5.0% through deslagging, fine screening, fine deslagging, concentration, thermal dispersion and pulping.
Furthermore, the beating degree of the long-fiber OCC is 26-32 SR, the wet weight is 6.5-7.5 g, the beating degree of the short-fiber OCC is 35-40 SR, and the wet weight is 3.5-4.5 g.
Further, in the second step, the surface layer pulp blending is 100% long fiber OCC pulp, and the bottom layer pulp blending comprises short fiber OCC pulp and broken pulp, wherein the mass ratio of the short fiber OCC pulp to the broken pulp is as follows: 80-100: 0 to 20.
And further, in the second step, the surface layer slurry and the bottom layer slurry are diluted, degassed and screened in front of the screen through respective short circulating systems, and a papermaking flow-assisting and filtering agent, a sizing agent, a dye, a defoaming agent and a bactericide are added.
And further, adding a toner into the surface layer slurry in the second step to adjust the color of the paper.
Furthermore, the technological parameters of the double-layer pulp flow box are that the opening of the lip plate is 12-17 mm, the net-feeding concentration of the surface layer pulp is 0.8-1.2%, the net-feeding concentration of the bottom layer pulp is 0.8-1.2%, the pulp speed net speed difference is-50 m/min, the pulp/net speed ratio is 0.96-1.04, and the flow ratio of the cross-width dilution water to the bottom layer pulp is 15-18%.
Furthermore, the working vacuum degree of each component in the net clamping part in the fourth step is as follows, the vacuum degree of the vacuum forming roller is-3 to-12 kpa, the vacuum degree of the water suction box of the upper arc-shaped dewatering box is-15 to-25 kpa, the vacuum degree of the dewatering boxes of the lower arc-shaped dewatering box and the low vacuum box is-20 to-25 kpa, the vacuum degree of the transfer vacuum dewatering box is-30 to-35 kpa, the vacuum degree of the high vacuum dewatering box is-40 to-50 kpa, and the vacuum degree of the vacuum box after the roll bending is-60 to-70 kpa.
Different from the prior art, the technical scheme has the following advantages: compared with the net folding papermaking process, the kraft liner board production process has the advantages that the net part dehydration capacity is higher, the paper forming uniformity is good at high vehicle speed, the papermaking vehicle speed is higher, and the energy is saved.
Drawings
Fig. 1 is a flow chart of a production process of kraft liner board paper according to this embodiment.
Detailed Description
To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
Referring to fig. 1, the present embodiment provides a production process of kraft liner board, including the following steps:
firstly, pulping OCC waste paper;
step two, preparing surface layer slurry and bottom layer slurry by using the OCC waste paper pulp obtained in the step one;
thirdly, spraying surface layer slurry and bottom layer slurry together to net on the net by using a double-layer head box of a dilution water screen paper machine with a banner to complete slurry distribution;
dewatering the surface layer slurry and the bottom layer slurry in a wire clamping part of the wire clamping paper machine to form a wet paper web;
step five, squeezing the wet paper web, and simultaneously increasing the temperature of the wet paper web;
and step six, drying and sizing the wet paper web.
In the actual production, the user prepares the OCC waste paper into OCC waste paper pulp, wherein the OCC waste paper is waste cardboard paper, the OCC waste paper is prepared into qualified pulp through the working procedures of crushing, screening, purifying, grading, thermal dispersing, concentrating, disc grinding, pulping and the like, the prepared pulp is graded and screened through a grading screen, the prepared pulp is screened into short-fiber OCC pulp and long-fiber OCC pulp, and the short-fiber OCC pulp and the long-fiber OCC pulp are respectively treated to obtain short-fiber OCC finished pulp and long-fiber OCC finished pulp.
And deslagging short fiber OCC slurry by a low-concentration deslagging device, concentrating the short fiber OCC slurry to form slurry with the concentration of 4.5-5.5% by a multi-disc concentrator, and conveying the slurry to a short fiber slurry tower for later use. And (3) deslagging long-fiber OCC pulp by using a low-concentration deslagging device, fine screening, fine deslagging by using a second low-concentration deslagging device, concentrating in a multi-disc concentrator, delivering the concentrated long-fiber OCC pulp to a thermal dispersion system to disperse hot melt adhesive and oil wax in the long-fiber OCC pulp, delivering the thermally dispersed long-fiber OCC pulp to a double-disc refiner for pulping to obtain OCC long-fiber finished pulp, and delivering the OCC long-fiber finished pulp to a long-fiber pulp tower for later use.
Slurry property index: the beating degree of the long-fiber OCC pulp is 26-32 SR, the wet weight is 6.5-7.5 g, the beating degree of the short-fiber OCC pulp is 35-40 SR, and the wet weight is 3.5-4.5 g.
And then preparing surface layer slurry and bottom layer slurry by using long-fiber OCC (optical fiber composite) slurry and short-fiber OCC slurry. The surface layer slurry preparation is long fiber OCC slurry with the concentration of 100%, the bottom layer slurry preparation comprises short fiber OCC slurry and damaged paper pulp, and the mass ratio of the short fiber OCC slurry to the damaged paper pulp is as follows: 80-100: and 0-20, wherein the broken paper pulp comprises wet broken paper, dry broken paper and white water multi-disc recovery pulp generated in the paper machine papermaking process.
The surface layer slurry and the bottom layer slurry are sprayed into a clamping area between the surface net and the bottom net of the net clamping part of the net clamping paper machine by a double-layer flow box with a banner dilution water net to finish the slurry distribution. In a preferred embodiment, the top stock and the bottom stock are diluted, degassed and screened through respective short circulation systems before being delivered to the double-layer headbox, and chemical auxiliaries such as papermaking flow and filter aids, sizing agents, dyes, defoamers, bactericides and the like are added, and in a more preferred embodiment, a toner is added to the linerboard top stock to adjust the hue of the paper. The surface layer slurry and the bottom layer slurry are processed and then conveyed to a pressure stabilizing tank to stabilize the pressure of slurry output, and then the slurry is sprayed into a clamping area between a surface net and a bottom net of a net clamping part of the net clamping paper machine through a double-layer slurry flow box to finish slurry distribution.
The double-layer flow box with the dilution water sandwich net comprises a surface layer slurry conical slurry distributor, a bottom layer slurry conical slurry distributor and a banner dilution water conical slurry distributor, wherein the surface layer slurry enters the double-layer sandwich net flow box through a surface layer slurry pressure stabilizing tank and the surface layer slurry conical slurry distributor in front of the double-layer flow box, the bottom layer slurry enters the double-layer sandwich net flow box through a bottom layer pressure stabilizing tank and the bottom layer slurry conical slurry distributor in front of the double-layer flow box, and banner dilution water for adjusting banner quantification enters the double-layer sandwich net flow box through the double-layer flow box front pressure stabilizing tank and the banner dilution water conical slurry distributor. The surface layer pulp and the bottom layer pulp entering the pulp flow box enter a material cavity formed by the upper lip and the lower lip of the pulp flow box through a turbulence generator of the pulp flow box, and the turbulence generator is used for keeping the paper in a good micro-turbulence state and avoiding the fiber from flocculating.
Two shorter head box float pieces and a longer head box float product are arranged in the double-layer head box material cavity, and three head box float pieces are formed, wherein the longer float piece plays a role in separating surface layer slurry from bottom layer slurry, and the two shorter float pieces play a role in homogenizing the slurry. The surface layer pulp and the bottom layer pulp are respectively kept in good micro-turbulence flow states and accelerated in an upper area and a lower area separated by a long floating sheet of the pulp flowing box, and are sprayed to a clamping area formed by a net part surface and a bottom two nets simultaneously from nozzles formed by an upper lip plate and a lower lip plate of the double-layer pulp flowing box at a speed close to the net speed of a paper machine.
In the embodiment, the technological parameters of the double-layer pulp flowing box are that the opening of a lip plate is 12-17 mm, the net-feeding concentration of surface layer pulp is 0.8-1.2%, the net-feeding concentration of bottom layer pulp is 0.8-1.2%, the pulp speed net speed difference is-50 m/min, the pulp/net speed ratio is 0.96-1.04, and the flow ratio of cross-width dilution water to bottom layer pulp is 15-18%.
After entering a forming roll clamping area of a mesh paper machine, paper materials are dewatered under the action of surface and bottom forming mesh tension, forming roll centrifugal force and vacuum suction, then enter an upper arc-shaped vacuum dewatering box, are dewatered under the action of vacuum suction to preliminarily form wet paper webs, moisture is removed in one part of the arc-shaped dewatering box, the vacuum horizontal suction box, the transfer vacuum box and the high vacuum box under a mesh part, and the dryness of the wet paper webs discharged from the mesh part is 22-23%. The fiber distribution in the stock can be maintained in the as-sprayed state during dewatering to form a wet web, and the fibers of the backsize and the ground size are still kept separate after forming the wet web. The vacuum degree of a surface net dewatering element is adjusted to adjust the dewatering speed of the paper, so that the paper is well dewatered and formed, the vacuum degree of a forming roller of a net clamping part is-3 to-12 kpa, the vacuum degree of a water suction box of an upper arc-shaped dewatering box is-10 to-25 kpa, the vacuum degree of a dewatering box of a lower arc-shaped dewatering box and a dewatering box of a low vacuum box is-20 to-25 kpa, the vacuum degree of a transfer vacuum dewatering box is-30 to-35 kpa, the vacuum degree of a high vacuum dewatering box is-40 to-50 kpa, and the vacuum degree of a vacuum box after roll bending over is-60 to-70 kpa.
The wet web is pressed while the wet web temperature is increased. The wet paper web formed in the wire clamping part of the wire clamping paper machine is sucked and carried into the pressing part by a suction roll of the pressing part, the pressing part is a four-roll three-nip shoe press, the first line pressing pressure is 90-100 kn/m, the second line pressing pressure is 130-140 kn/m, and the shoe line pressing pressure is 1200-1400 kn/m; the press part is provided with a steam box, steam is sprayed to the wet paper web to improve the temperature of the wet paper web, the moisture of the formed paper web is adjusted, the press dehydration efficiency is improved, and the working steam pressure of the steam box is 35-40 kpa. The dryness of the paper sheet at the outlet pressing part is 52-53%.
The wet web is dried and sized. The wet paper web out of the squeezing part enters a surface sizing machine after entering a fully-closed air hood, an automatic blowing paper guiding system, a paper stabilizing and stabilizing system, a paper breakage detection system, a front-drying single-row cylinder drying cylinder group and a front-drying upper-lower cylinder drying cylinder group, and the dryness of the paper web entering the sizing machine is 92-94%; the surface sizing machine is a filmTransferring, metering and gluing, wherein the glue application amount is 1.2-2.5 g/m of surface layer2The bottom layer is 1.5 to 3.5g/m2(ii) a And after surface sizing, the paper web enters a post-drying part for continuous drying, and the drying degree after the paper web is taken out is 90-94%. In a preferred embodiment, the web is calendered by a calender, wound, rewound, baled and warehoused.
In the production example, 100% of OCC waste paper is used as raw material, the production process is used for producing the kraft liner board, the produced kraft liner board has excellent quality, and all quality indexes completely reach the quality standard. The speed of the paper machine is 1200-1400 m/min, and the basis weight of the paper is 70-175 g/m2And annual cowhide box board paper yield 45 ten thousand tons. Compared with the traditional process, the unit power consumption of similar products is reduced by 80-120 kwh/t paper, the power consumption is reduced by 15-25%, the yield is improved by 30-40%, the energy-saving and consumption-reducing effects are obvious, and the paper becomes a model of global packaging paper production.
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 content of the present specification and the attached drawings, which are included in the scope of the present invention.
Claims (4)
1. The production process of the kraft liner board paper is characterized by comprising the following steps:
firstly, pulping OCC waste paper;
step two, preparing surface layer slurry and bottom layer slurry by using the OCC waste paper pulp obtained in the step one;
thirdly, spraying surface layer slurry and bottom layer slurry together to net on the net by using a double-layer head box of a dilution water screen paper machine with a banner to complete slurry distribution;
dewatering the surface layer slurry and the bottom layer slurry in a wire clamping part of the wire clamping paper machine to form a wet paper web;
step five, squeezing the wet paper web, and simultaneously increasing the temperature of the wet paper web;
step six, drying and sizing the wet paper web;
screening the OCC waste paper in the first step into short-fiber OCC pulp and long-fiber OCC pulp;
deslagging the short fiber OCC slurry, and concentrating the short fiber OCC slurry to form short fiber OCC slurry with the concentration of 4.5-5.5%;
the long-fiber OCC pulp is processed into long-fiber OCC pulp with the concentration of 4.0 to 5.0 percent through deslagging, fine screening, fine deslagging, concentration, thermal dispersion and pulping;
the beating degree of the long-fiber OCC is 26-32 DEG SR, the wet weight is 6.5-7.5 g, the beating degree of the short-fiber OCC is 35-40 DEG SR, and the wet weight is 3.5-4.5 g;
in the second step, the surface layer pulp preparation is 100% long fiber OCC pulp, the bottom layer pulp preparation comprises short fiber OCC pulp and damaged pulp, and the mass ratio of the short fiber OCC pulp to the damaged pulp is as follows: 80-100: 0 to 20;
the technological parameters of the double-layer pulp flowing box are that the opening of a lip plate is 12-17 mm, the net-feeding concentration of surface layer pulp is 0.8-1.2%, the net-feeding concentration of bottom layer pulp is 0.8-1.2%, the pulp speed net speed difference is-50 m/min, the pulp/net speed ratio is 0.96-1.04, and the flow ratio of banner dilution water to bottom layer pulp is 15-18%.
2. The kraft liner board production process according to claim 1, characterized by: and in the second step, the surface layer slurry and the bottom layer slurry are diluted, degassed and screened in front of the screen through respective short circulating systems, and papermaking flow-assisting and filtering aids, sizing agents, dyes, defoaming agents and bactericides are added.
3. The kraft liner board production process according to claim 1, characterized by: and in the second step, a toner is added into the surface layer slurry to adjust the paper color.
4. The kraft liner board production process according to claim 1, characterized by: the working vacuum degree of each component in the net clamping part in the fourth step is as follows, the vacuum degree of the vacuum forming roller is-3 to-12 kpa, the vacuum degree of the water suction box of the upper arc-shaped dewatering box is-15 to-25 kpa, the vacuum degree of the dewatering boxes of the lower arc-shaped dewatering box and the low vacuum box is-20 to-25 kpa, the vacuum degree of the transfer vacuum dewatering box is-30 to-35 kpa, the vacuum degree of the high vacuum dewatering box is-40 to-50 kpa, and the vacuum degree of the vacuum box after the roll bending over is-60 to-70 kpa.
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| CN201810915966.6A CN109024058B (en) | 2018-08-13 | 2018-08-13 | Production process of kraft board paper |
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| CN110080031B (en) * | 2019-05-27 | 2021-08-20 | 联盛纸业（龙海）有限公司 | Production process of special core paper for compounding high-grade gray board paper |
| CN110983853A (en) * | 2019-11-22 | 2020-04-10 | 山鹰华南纸业有限公司 | Method for producing T paper by long-wire paper machine |
| CN111424460B (en) * | 2020-03-25 | 2022-12-20 | 山鹰国际控股股份公司 | Method for manufacturing regenerated two-layer cardboard paper by running three-layer net-folding paper machine |
| CN111979843A (en) * | 2020-08-24 | 2020-11-24 | 山鹰国际控股股份公司 | Wet-end papermaking process for improving surface smoothness of paper |
| CN112813728A (en) * | 2021-01-21 | 2021-05-18 | 安徽理工大学 | Production process and device of moisture-proof and corrosion-proof corrugated paper |
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| CN105316977A (en) * | 2015-06-10 | 2016-02-10 | 江苏理文造纸有限公司 | A manufacturing process method for cardboard paper with a printing surface layer |
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- 2018-08-13 CN CN201810915966.6A patent/CN109024058B/en active Active
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| CN101338530A (en) * | 2008-08-07 | 2009-01-07 | 华南理工大学 | Multi-layer paper sheet gap former and method |
| CN101565913A (en) * | 2009-05-08 | 2009-10-28 | 东莞玖龙纸业有限公司 | Method for producing corrugated paper with ultralow gram weight and high strength |
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Denomination of invention: A Production Process for Kraft Box Board Paper Effective date of registration: 20231222 Granted publication date: 20210430 Pledgee: Bank of Communications Ltd. Zhangzhou branch Pledgor: LIANSHENG PAPER INDUSTRY (LONGHAI) Co.,Ltd. Registration number: Y2023350000261 |