CN104499342A - Waterproof kraft paper manufacturing process - Google Patents
Waterproof kraft paper manufacturing process Download PDFInfo
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- CN104499342A CN104499342A CN201410684936.0A CN201410684936A CN104499342A CN 104499342 A CN104499342 A CN 104499342A CN 201410684936 A CN201410684936 A CN 201410684936A CN 104499342 A CN104499342 A CN 104499342A
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- pulp
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- brown paper
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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
- D21F11/02—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type
-
- 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
-
- 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
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Abstract
A waterproof kraft paper manufacturing process includes steps of (1) selecting raw materials, to be specifically, selecting softwood pulp, hardwood pulp and bamboo pulp; (2) mixing and pulping the raw materials, specifically, feeding the softwood pulp, the hardwood pulp and the bamboo pulp into a repulping tank to obtain mixed pulp; (3) grinding into thick liquid; (4) processing, sequentially performing a sizing process, a dewatering process, a drying process, a pressing process and a polishing process, wherein the pressure of the pressing process ranges from 0.17 MPa to 0.21 MPa, and a linear pressure range of the polishing process ranges from 185 kN/m to 220 kN/m. Length and diameter of the fibers are compensated, fibers have gaps, the surface of the kraft paper is smoothed by polishing and is dense, the surface fibers are denser, porosity is decreased and water resistance is improved.
Description
Technical field
The present invention relates to the manufacturing technique of resistance to water brown paper, belong to paper-making technology field.
Background technology
Brown paper, as packaging material, intensity is very high, and usually in yellowish-brown, the kraft pulp of half drift or full drift is filbert, cream-colored or white, quantitative 80 ~ 120g/m
2, tearing toughness, merit of breaking and resistance to vibration are very high, mostly are roll web, also have sheet paper, employing kp softwood pulp is raw material, through making beating, fourdrinier machine is manufactured paper with pulp and forms, can be used as cement bag paper, M.G. pure sulphite paper, rubber seal paper dress, bituminized paper, cable protective paper, insulating paper etc.
The production technology of brown paper comparatively ripe is at present normally raw material with sulfate wood pulp, adopts sulfate larch wood pulp to be raw material, and after system process before bleaching, screening, making beating, applying glue, slagging-off and net, upper machine is manufactured paper with pulp.Through press polish process, improve page glossiness, minimizing page two sides is poor.The brown paper of this fabrication process is highly finished kraft paper, and color and luster is more shallow, and smoothness and the fine constant product quality of intensity, as a kind of packaging material be popular, in very large range instead of natural kraft.
The production technology of highly finished kraft paper needs strictly to control bleaching process, avoids overbleaching to cause intensity to reduce.
The hardness of slurry directly determines the consumption of bleaching liquor, while determining bleaching liquor consumption, due to the hardness federation difference to some extent of every pot of slurry, and the difference of the slurry temperature of Various Seasonal, especially in the north, summer in the winter temperature difference can reach more than 15 degrees Celsius.Therefore the bleaching time of every stock tank material is also variant, 0.5 more than h can be reached at most, so strictly bleaching time must be controlled, otherwise due to the prolongation of bleaching time, although pulp brightness can be improved to a certain extent, but can be lowered into the mechanical strength of paper, and the brightness reversion chance that can make into paper increases, quality is unstable.Usually by controlling bleaching temperature between 30-40 degree Celsius, good bleaching effect can be obtained, and obtain well stable mechanical strength.
The need of production of highly finished kraft paper carries out applying glue, and the bleaching a small amount of calcium hypochlorite remained in paper pulp generally can not have an impact to applying glue.But in actual production operation, in order to ensure the whiteness requirement of partly bleach pulp, some factory adds a small amount of bleaching liquor after bleaching in stock tank, to ensure the whiteness of slurry, or because bleaching slurry washing is thorough not, cause in drift disposed slurry and still contain a large amount of calcium salt bases, carry out applying glue workshop section, form rosin acid calcium precipitate with free rosin acid anion, form CaSO4 with the sulfate ion in alum and precipitate.This sediment and sizing material, resin-bonded, have certain viscosity, is very easy to fouling precipitation on feed-line and equipment.When sediment is more, can directly affects manufacturing paper with pulp of page, reduce sizing efficiency simultaneously, affect into the quality of paper.This phenomenon becomes clearly at the hot weather in summer.
The production technology of highly finished kraft paper needs strengthened purification screening system, removes granule foreign.
The production technology of highly finished kraft paper needs the difference of correct understanding pulp brightness and Paper White Degree, is suitable for reducing pulp brightness.
Inventor finds through retrieval, the patent No. is 2008100933910, patent name is: Exquisite kraft paper and production method thereof, disclose the method utilizing masson pine, China fir, leaf wood manufacture brown paper, although reach good brown paper performance, the cost of material producing brown paper is very high, cause the cost of brown paper very high, be unfavorable for much requiring that low place uses.
Inventor also finds through retrieval, application number is 201310246673.0, patent name is: water suction brown paper and manufacture craft thereof, which disclosing by the mixed slurry of sulfate bleaching needle-point leaf pulp and sulfate bleached hardwood pulp is fibrous raw material, add the water suction brown paper that wet strength agent, brightening agent and dispersant are obtained, but the additive in this brown paper is a lot, causes in the actual production of brown paper, very unmanageable waste water can be produced, be unfavorable for cleaner production.
Summary of the invention
In order to solve above-mentioned Problems existing, the invention discloses the manufacturing technique of resistance to water brown paper, concrete technical scheme is:
The manufacturing technique of this resistance to water brown paper, comprises the following steps:
(1) select raw material: select the softwood pulp of sulfate bleaching, hardwood pulp and bamboo pulp, the part by weight of softwood pulp, hardwood pulp and bamboo pulp that sulfate is bleached is 1:1:0.3 ~ 0.7;
(2) raw material mixing making beating: softwood pulp, hardwood pulp and the bamboo pulp of being bleached by sulfate are rendered in pulping pond according to the ratio described in step (1), and industry water is added in pulping pond, and be uniformly mixed, obtain mixing slurry, the concentration of mixing slurry is 1.5% ~ 3.0%;
(3) defibrination operation: the mixing of step (2) gained slurry is transported to fiberizer, mixing slurry becomes through fiberizer and is uniformly dispersed, and has been transported in tower stand-by;
(4) upper machine: by the slurry transferring that completes in tower to paper machine, successively through sizing process, dehydration procedure, drying process, squeezing process and press polish operation.
The step (21) adding internal sizing agent is also provided with between described step (2) and step (3), first the mixing of step (2) gained slurry is transported to reserve pit, drop into internal sizing agent in reserve pit, and be uniformly mixed, the concentration of internal sizing agent reaches 0.25% ~ 0.35%.
Described internal sizing agent selects cation emulsion gum rosin.
Also be provided with scalping step (22) between described step (21) and step (3), the slurry transferring of step (21) gained is carried out scalping in defibrator, through the slurry transferring of defibrator to step (3).
The pressure of described step squeezing process is 0.17 MPa ~ 0.21MPa.
The linear pressure interval of described press polish operation is 185kN/m ~ 220 kN/m.
The present invention select softwood pulp, hardwood pulp and bamboo pulp according to part by weight be 1:1:0.3 mixing as raw material, ensure length and the diametrically phase complementary fit of the fiber in resistance to water brown paper, softwood pulp fiber is thinner, longer, more soft, hardwood pulp fiber is comparatively thick, shorter, bamboo pulp fiber is harder, and short and small, each fibrid can be filled mutually, and the space between fiber is little, block water can divide and enter into brown paper inside, there is good resistance to water.
Simultaneously, the present invention is the squeezing process of 0.17 MPa ~ 0.21MPa in manufacture process by pressure, moisture in brown paper can be squeezed out by more thorough base pressure, by the press polish operation that linear pressure interval is 185kN/m ~ 220 kN/m, make the surface of brown paper level and smooth by press polish, dense surface, tightr between surface fiber, reduce voidage, improve water resistance.By test, the produced resistance to water brown paper of the present invention, drips drop of water on resistance to water brown paper surface, infiltrates in resistance to water brown paper completely, can maintain 5.5 minutes to the globule.
Detailed description of the invention
Below in conjunction with detailed description of the invention, illustrate the present invention further.Following detailed description of the invention should be understood only be not used in for illustration of the present invention and limit the scope of the invention.
Embodiment 1:
The manufacturing technique of this resistance to water brown paper, comprises the following steps:
(1) select raw material: select the softwood pulp of sulfate bleaching, hardwood pulp and bamboo pulp, the part by weight of softwood pulp, hardwood pulp and bamboo pulp that sulfate is bleached is 1:1:0.3;
(2) raw material mixing making beating: softwood pulp, hardwood pulp and the bamboo pulp of being bleached by sulfate are rendered in pulping pond according to the ratio described in step (1), and industry water is added in pulping pond, and be uniformly mixed, obtain mixing slurry, the concentration of mixing slurry is 1.5%;
(21) first the mixing of step (2) gained slurry is transported to reserve pit, drop into cation emulsion gum rosin in reserve pit, and be uniformly mixed, the concentration of cation emulsion gum rosin reaches 0.25%;
(22) slurry transferring of step (21) gained is carried out scalping in defibrator;
(3) defibrination operation: the mixing of step (22) gained slurry is transported to fiberizer, mixing slurry becomes through fiberizer and is uniformly dispersed, and has been transported in tower stand-by;
(4) upper machine: by the slurry transferring that completes in tower to paper machine, successively through sizing process, dehydration procedure, drying process, squeezing process and press polish operation, the pressure of squeezing process is 0.17 MPa, and the linear pressure interval of press polish operation is 185kN/m.
Embodiment 2:
The manufacturing technique of this resistance to water brown paper, comprises the following steps:
(1) select raw material: select the softwood pulp of sulfate bleaching, hardwood pulp and bamboo pulp, the part by weight of softwood pulp, hardwood pulp and bamboo pulp that sulfate is bleached is 1:1:0.5;
(2) raw material mixing making beating: softwood pulp, hardwood pulp and the bamboo pulp of being bleached by sulfate are rendered in pulping pond according to the ratio described in step (1), and industry water is added in pulping pond, and be uniformly mixed, obtain mixing slurry, the concentration of mixing slurry is 2.2%;
(21) first the mixing of step (2) gained slurry is transported to reserve pit, drop into cation emulsion gum rosin in reserve pit, and be uniformly mixed, the concentration of cation emulsion gum rosin reaches 0.3%;
(22) slurry transferring of step (21) gained is carried out scalping in defibrator;
(3) defibrination operation: the mixing of step (22) gained slurry is transported to fiberizer, mixing slurry becomes through fiberizer and is uniformly dispersed, and has been transported in tower stand-by;
(4) upper machine: by the slurry transferring that completes in tower to paper machine, successively through sizing process, dehydration procedure, drying process, squeezing process and press polish operation, the pressure of squeezing process is 0.19MPa, and the linear pressure interval of press polish operation is 205 kN/m.
Embodiment 3:
The manufacturing technique of this resistance to water brown paper, comprises the following steps:
(1) select raw material: select the softwood pulp of sulfate bleaching, hardwood pulp and bamboo pulp, the part by weight of softwood pulp, hardwood pulp and bamboo pulp that sulfate is bleached is 1:1:0.7;
(2) raw material mixing making beating: softwood pulp, hardwood pulp and the bamboo pulp of being bleached by sulfate are rendered in pulping pond according to the ratio described in step (1), and industry water is added in pulping pond, and be uniformly mixed, obtain mixing slurry, the concentration of mixing slurry is 3.0%;
(21) first the mixing of step (2) gained slurry is transported to reserve pit, drop into cation emulsion gum rosin in reserve pit, and be uniformly mixed, the concentration of cation emulsion gum rosin reaches 0.35%;
(22) slurry transferring of step (21) gained is carried out scalping in defibrator;
(3) defibrination operation: the mixing of step (22) gained slurry is transported to fiberizer, mixing slurry becomes through fiberizer and is uniformly dispersed, and has been transported in tower stand-by;
(4) upper machine: by the slurry transferring that completes in tower to paper machine, successively through sizing process, dehydration procedure, drying process, squeezing process and press polish operation, the pressure of squeezing process is 0.21MPa, and the linear pressure interval of press polish operation is 220 kN/m.
Control its dependent variable identical, resistance to water brown paper is produced by above-mentioned 3 embodiments, resistance to water is tested, the environment that resistance to water brown paper is placed in constant temperature and humidity is tested, resistance to water brown paper drips the globule of the size such as, then waits for that the globule immerses in water-fast brown paper completely, the record globule immerses the time in resistance to water brown paper completely, each embodiment does 3 these tests respectively, and the test result of above-mentioned three specific embodiments is respectively:
Embodiment 1:5.3 minute, 4.9 minutes, 5.1 minutes;
Embodiment 2:4.9 minute, 5.1 minutes, 5.4 minutes;
Embodiment 3:5.6 minute, 5.1 minutes, 5.5 minutes.
Technological means disclosed in the present invention program is not limited only to the technological means disclosed in above-mentioned technological means, also comprises the technical scheme be made up of above technical characteristic.
Claims (6)
1. the manufacturing technique of resistance to water brown paper, is characterized in that comprising the following steps:
(1) select raw material: select the softwood pulp of sulfate bleaching, hardwood pulp and bamboo pulp, the part by weight of softwood pulp, hardwood pulp and bamboo pulp that sulfate is bleached is 1:1:0.3 ~ 0.7;
(2) raw material mixing making beating: softwood pulp, hardwood pulp and the bamboo pulp of being bleached by sulfate are rendered in pulping pond according to the ratio described in step (1), and industry water is added in pulping pond, and be uniformly mixed, obtain mixing slurry, the concentration of mixing slurry is 1.5% ~ 3.0%;
(3) defibrination operation: the mixing of step (2) gained slurry is transported to fiberizer, mixing slurry becomes through fiberizer and is uniformly dispersed, and has been transported in tower stand-by;
(4) upper machine: by the slurry transferring that completes in tower to paper machine, successively through sizing process, dehydration procedure, drying process, squeezing process and press polish operation.
2. the manufacturing technique of resistance to water brown paper according to claim 1, it is characterized in that between described step (2) and step (3), being also provided with the step (21) adding internal sizing agent, first the mixing of step (2) gained slurry is transported to reserve pit, internal sizing agent is dropped in reserve pit, and be uniformly mixed, the concentration of internal sizing agent reaches 0.25% ~ 0.35%.
3. the manufacturing technique of resistance to water brown paper according to claim 1, is characterized in that described internal sizing agent selects cation emulsion gum rosin.
4. the manufacturing technique of resistance to water brown paper according to claim 3, it is characterized in that also being provided with scalping step (22) between described step (21) and step (3), the slurry transferring of step (21) gained is carried out scalping in defibrator, through the slurry transferring of defibrator to step (3).
5. the manufacturing technique of resistance to water brown paper according to claim 1, is characterized in that the pressure of described step squeezing process is 0.17 MPa ~ 0.21MPa.
6. the manufacturing technique of resistance to water brown paper according to claim 1, is characterized in that the linear pressure interval of described press polish operation is 185kN/m ~ 220 kN/m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410684936.0A CN104499342B (en) | 2014-11-25 | 2014-11-25 | The manufacturing process of water resistance brown paper |
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| CN201410684936.0A CN104499342B (en) | 2014-11-25 | 2014-11-25 | The manufacturing process of water resistance brown paper |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105256639A (en) * | 2015-11-05 | 2016-01-20 | 义乌市义南纸业有限公司 | Firm and durable bobbin paper and production process thereof |
| CN105507058A (en) * | 2015-12-19 | 2016-04-20 | 北海光利彩色印刷有限公司 | Production technology for kraft liner board |
| CN105568736A (en) * | 2015-12-19 | 2016-05-11 | 北海光利彩色印刷有限公司 | Manufacture process of brown paper |
| CN105755889A (en) * | 2016-04-01 | 2016-07-13 | 苏州市鼎立包装有限公司 | Preparation method of flame-retardant kraft paper |
| CN105862497A (en) * | 2016-04-01 | 2016-08-17 | 苏州市鼎立包装有限公司 | Preparation method of highly air-permeable kraft paper |
| CN106522016A (en) * | 2016-11-21 | 2017-03-22 | 广州市极合技术咨询有限公司 | Burst-resistant brown paper and making method thereof |
| CN108735403A (en) * | 2018-05-25 | 2018-11-02 | 南京林业大学 | High-tension cable paper and its production method with high insulating property and tightness |
| CN112391874A (en) * | 2019-08-19 | 2021-02-23 | 桂林奇峰纸业有限公司 | Production method of coated paper for storage battery |
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| CN101100829A (en) * | 2007-06-26 | 2008-01-09 | 永州湘江纸业有限责任公司 | Elaborate brown paper and producing method thereof |
| CN101538812A (en) * | 2009-04-29 | 2009-09-23 | 安徽华邦特种纸业有限公司 | Blueprint base paper making technology |
| CN103397560A (en) * | 2013-07-29 | 2013-11-20 | 金华盛纸业（苏州工业园区）有限公司 | Two-sided offset paper for paper bags and preparation method of two-sided offset paper |
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| CN1088277A (en) * | 1993-08-14 | 1994-06-22 | 黑龙江造纸厂 | Process for making highly finished kraft paper |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105256639A (en) * | 2015-11-05 | 2016-01-20 | 义乌市义南纸业有限公司 | Firm and durable bobbin paper and production process thereof |
| CN105507058A (en) * | 2015-12-19 | 2016-04-20 | 北海光利彩色印刷有限公司 | Production technology for kraft liner board |
| CN105568736A (en) * | 2015-12-19 | 2016-05-11 | 北海光利彩色印刷有限公司 | Manufacture process of brown paper |
| CN105507058B (en) * | 2015-12-19 | 2017-08-04 | 宁波远志立方能源科技有限公司 | The production technology of ox-hide card |
| CN105755889A (en) * | 2016-04-01 | 2016-07-13 | 苏州市鼎立包装有限公司 | Preparation method of flame-retardant kraft paper |
| CN105862497A (en) * | 2016-04-01 | 2016-08-17 | 苏州市鼎立包装有限公司 | Preparation method of highly air-permeable kraft paper |
| CN106522016A (en) * | 2016-11-21 | 2017-03-22 | 广州市极合技术咨询有限公司 | Burst-resistant brown paper and making method thereof |
| CN108735403A (en) * | 2018-05-25 | 2018-11-02 | 南京林业大学 | High-tension cable paper and its production method with high insulating property and tightness |
| CN112391874A (en) * | 2019-08-19 | 2021-02-23 | 桂林奇峰纸业有限公司 | Production method of coated paper for storage battery |
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| CN104499342B (en) | 2017-07-14 |
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