CN102061642A - Method for improving intensity of corrugated medium paper and paperboard by using pulping waste liquor of high-yield pulp - Google Patents
Method for improving intensity of corrugated medium paper and paperboard by using pulping waste liquor of high-yield pulp Download PDFInfo
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Abstract
The invention discloses a method for improving intensity of corrugated medium paper and a paperboard by using pulping waste liquor of high-yield pulp. High-yield pulping waste liquor is concentrated and undissolved substances, such as fine fibers, sediment and the like are removed from concentrated high-yield pulping waste liquor by a filtration method or a centrifugation method so as to obtain waste liquor A with hemicelluloses and lignin and the waste liquor A and starch are mixed to prepare waste liquor A-starch glue solution; and the waste liquor A-starch glue solution is used as surface sizing liquor of the corrugated medium paper and the paperboard and interlayer spraying liquor of the paperboard to improve the tensile strength and the ring crush compression resistance of the corrugated medium paper and the paperboard. A preparation method of the waste liquor A-starch glue solution is simple and practicable, the cost is low, waste liquor can be comprehensively utilized to the maximum extent, environmental pollution is reduced, and waste is recycled. Moreover, starch is partially replaced, and a new way is provided for relieving food security crisis.
Description
Technical field
The present invention relates to a kind of utilization and packing board processing and treating method of high yield pulp pulping waste liquor, relate to the method that a kind of high yield pulp pulping waste liquor is used to improve the intensity of fluting medium and cardboard specifically.
Technical background
In recent years, the production development of high yield pulp is rapid, and is especially after bleached chemical thermomechanical pulp (BCTMP), swift and violent in APMP (APMP) production development that release the nineties.This pulping process is that the pollutional load of its waste liquid is lower with the technical process of boiling and the synthetic unit of two pulping process of bleaching, and sulfur-bearing not, so waste liquid is easy to handle, and its processing method also causes extensive concern gradually.
There are some researches show that in traditional chemical pulping process, 50% the cellulose of only having an appointment is retained, form and be about 40% hemicellulose and lignin and be dissolved in the waste liquid mostly and account for raw material.When producing high yield pulp, though hemicellulose has more reservation, still have materials such as the hemicellulose of a great deal of and a small amount of lignin to be dissolved in the waste liquid, make the utilization rate of wood raw material descend.
In recent years, number of research projects has been carried out in double cellulosic application of pulping and paper-making worker both at home and abroad, and achievement in research shows that hemicellulose can be used as the reinforcing agent of paper grade (stock).People such as Sybe are published in " Hemicelluloses:Science and Technology " 2004 the 23rd chapter 360-371 pages or leaves " Production of oxidized guar galacto mannan and its application in thepaper industry " bibliographical information: the poly-galactolipin mannose hemicellulose of guar gum oxidation, be applied in the papermaking as wet end adjuvant, can significantly improve the intensity of paper pulp.
Chinese invention patent specification notification number CN101838348A (September 22 2010 day for announcing) " has hemicellulose derivative and the method for making and the application of two kinds of functional groups ", disclosed with 3 times of volume ethanol precipitation wheat straw waste alkali extracts, got the hemicellulose precipitation.Dried hemicellulose has prepared the novel hemicellulose derivative that has two kinds of different functionalities groups with processing such as NaOH, acrylamides, can be used as the paper making wet part auxiliary agent and is applied to paper industry.
The hemicellulose that above-mentioned document discloses is to be used to improve the intensity of paper pulp and as the paper making wet part auxiliary agent.
Fluting medium is one of important composition material of producing corrugated board.With raw materials such as wheat-straw pulps is the main fluting medium of producing, and its papery is more crisp, and tensile strength is poor.And be the main fluting medium of producing with the secondary stock, its tensile strength is higher, but compression strength is relatively poor.Press performance for the tensile strength and the ring that strengthen fluting medium, adopt Cypres that it is carried out surface treatment.
Cardboard is to be formed by the laminated moulding of multiple ply dheet that surface layer slurry, sandwich layer slurry and bottom slurry are copied system at many cylinders paperboard machine or multilength net paper machine.Cardboard causes layering because of the interfacial bonding strength of cardboard is low or splits in printing or use.Twentieth century since the nineties both at home and abroad production producer generally adopt interlayer spray gluing method, the starch glue is sprayed between ply of board as reinforcing agent, to improve the cardboard interfacial bonding strength.
The above-mentioned Cypres and the reinforcing agent that is used for spray process processing cardboard that is used to handle fluting medium and cardboard mainly be the starch glue, and the final source of starch is a grain.
Double cellulosic application study of paper industry both at home and abroad in recent years mainly is at separating the hemicellulose that obtains in the plant fiber material, and the separation and Extraction of hemicellulose often adopts ethanol precipitation, not only separation process complexity, and cost height, be difficult in industry, using, therefore only be in theoretical and laboratory research stage.Plant fiber material can be directly used in slurrying, and the utilization again of pulping waste liquor is to make full use of its discarded object, so can realize the maximum value of plant fiber material.
Research finds that hemicellulose can increase the combination between the fiber, improves tensile strength, pop strength, surface strength and the internal bond strength etc. of paper and cardboard; Lignin can increase the ring crush intensity and the deflection of fluting medium and cardboard.Organic matter in the pulping waste liquor is mainly hemicellulose, lignin and catabolite thereof.Wherein semi-chemical pulp and chemical pulp yield low (＜75%), the hemicellulose level in its waste liquid is higher, but because its treatment conditions are more violent, and the hemicellulose palliating degradation degree is big, and the lignin content height, are used for paper and strengthen the combination that is unfavorable between the fiber; Mechanical pulp such as thermomechanical pulp (TMP) yield height (90%-95%), the hemicellulose palliating degradation degree is low in the waste liquid, but its concentration is low excessively, is unsuitable for commercial Application; Chemi-mechanical pulp is as bleachingization thermomechanical pulp (BCTMP) and Alkaline Peroxide Mechanical Pulp (APMP), yield is about 80%-90%, the hemicellulose that contains a great deal of in the waste liquid, and palliating degradation degree is low, contain a spot of lignin in addition, can make full use of wherein hemicellulose and lignin as paper making additive, comprehensively improve paper strength.And how to utilize wherein hemicellulose and lignin, be the research topic that the pulping and paper-making industry is demanded urgently researching and developing.
Summary of the invention
Purpose of the present invention is intended to solve the problem that the high yield pulp pulping waste liquor utilizes again, and a kind of hemicellulose in the high yield pulp pulping waste liquor and waste liquid A of lignin of remaining with is provided.
Second purpose of the present invention, the method that is intended to a kind of waste liquid A and the starch preparation waste liquid A-starch glue of the alternative starch of part.
Another object of the present invention aims to provide the method that a kind of waste liquid A-starch glue is handled fluting medium and cardboard, to reach the purpose of physical properties such as the tensile strength that improves fluting medium and cardboard and ring crush intensity.
For realizing the above-mentioned purpose of the present invention, the technical scheme that is adopted is:
A kind of high yield pulp pulping waste liquor, comprise that high yield do not float the pulping waste liquor with bleached chemi-mechanical pulp, it is characterized in that: do not float pulping waste liquor with bleached chemi-mechanical pulp from bleached chemical thermomechanical pulp BCTMP and Alkaline Peroxide Mechanical Pulp APMP and other, insoluble matters such as the fiber fines in employing filter filtration method or the centrifuge centrifugal process removal waste liquid, silt, keep wherein hemicellulose and lignin, and produce to such an extent that remain with the waste liquid A of hemicellulose and lignin, the outward appearance of waste liquid A is little yellow.
The method of a kind of waste liquid A and starch preparation waste liquid A-starch glue, specific as follows:
1), starch material
Cornstarch, wheaten starch or tapioca;
2), the preparation of gelatinized starch
Get 100～300kg starch, add water and be assigned to concentration 10～25%, in the ammonium persulfate that wherein adds 0.5～1.5%, carry out gelatinization and handle, be warming up to 35～50 ℃, about reaction 10min, continue to be warming up to 85～95 ℃, about insulation 30min, make gelatinization of starch solution;
3), the preparation of waste liquid A-starch glue
The good starch solution of waste liquid A after the processing and gelatinization carried out compositely to contain admittedly than 1: 5～5: 2, make waste liquid A-starch glue.
A kind of waste liquid A-starch glue is used to improve the method for the intensity of fluting medium and cardboard, comprise material pond formula size press and membrane type size press, it is characterized in that: described waste liquid A-starch glue is as handling fluting medium and paperboard surface applying glue liquid, fluting medium and cardboard are to self not strict demand of color, applying glue liquid concentration is 4%～10%, temperature is 25 ℃～70 ℃, adopt material pond formula size press or membrane type size press to carry out top sizing and handle, page carries out dried and press polish processing in Dryer Section of Paper Machine and calecder section after the applying glue.
A kind of waste liquid A-starch glue is used to improve the method for paper board strength, the processing method, spray glue and the nozzle metering device that comprise spray process, it is characterized in that: described waste liquid A-starch glue is as spray glue, be used between the treatment paper flaggy, described cardboard is to self not strict demand of color, spray glue temperature is 25 ℃-80 ℃, spray concentration is 4%～12%, spray glue sprays at each layer l Water Paper page frame table equably with certain pressure, top layer does not spray processing, and the l Water Paper page or leaf behind the spray is carried out compound, squeezing and dry.
Beneficial effect
Compared with prior art, the present invention adopts easy method will not float and bleached chemi-mechanical pulp, be mixed with waste liquid A-starch glue as pulping waste liquors such as BCTMP, APMP and starch, combine the spray glue as fluting medium with the surface size of cardboard and the interlayer of cardboard respectively, the collocation method of two kinds of glues is simple, easy operating, with low cost; Fluting medium and cardboard are had good enhancing effect, reached the purpose of " turning waste into wealth "; The part waste liquid substitutes starch, provides a new way for alleviating the grain security crisis, and has the beneficial effect that meets resource-conserving and environmentally friendly sustainable development requirement.
The specific embodiment
Embodiment 1
Will be from alkaline hydrogen peroxide machinery pulping (APMP) waste liquid of screw press portion, insoluble matters such as the fiber fines after concentrating in the employing flame filter press removal waste liquid, silt, obtain the waste liquid A that remains with hemicellulose and lignin, waste liquid A and starch preparation waste liquid A-starch applying glue glue, compound method is as follows:
1), starch material
Cornstarch;
2), the preparation of gelatinized starch
Get the 200kg cornstarch, add water and be assigned to concentration 20%, in the ammonium persulfate that wherein adds 1.0%, carry out gelatinization and handle, be warming up to 45 ℃, reaction 10min continues to be warming up to 95 ℃, and insulation 30min makes gelatinization of starch solution;
3), the preparation of top sizing glue
The good starch fluid of waste liquid after the processing and gelatinization carried out compositely to contain admittedly than 3: 2, make waste liquid A-starch surface sizing glue;
Above-mentioned waste liquid A-starch glue carries out the top sizing processing method as the top sizing glue to fluting medium: the quantitative of described fluting medium is 120g/m
2About, the concentration of waste liquid A-starch applying glue liquid is 6%, and the applying glue liquid temp is 50 ℃, carries out top sizing and handle in paper machine applying glue equipment, and page carries out dried and press polish processing in Dryer Section of Paper Machine and calender after the applying glue;
The kiss-coating amount of said method gained fluting medium is 6.4g/m
2, the tensile strength of page and ring crush intensity improve 35.0% and 27.6% respectively than blank sample.
Below be the condition optimizing process:
Gelatin concentration is 6% o'clock, the starch fluid of APMP pulping waste liquor and gelatinization is carried out composite according to 3: 2 ratio of solid content, and control applying glue liquid temp is respectively 25 ℃, 50 ℃ and 70 ℃.Measure every physical strength index of the fluting medium of applying glue under the different applying glue temperature, see Table 1.
Table 1
As can be seen from Table 1, with the composite top sizing that is used for fluting medium of the starch fluid of Alkaline Peroxide Mechanical Pulp pulping waste liquor and gelatinization, obvious enhancing effect is arranged, its suitable applying glue temperature is 50 ℃.
Starch fluid after APMP pulping waste liquor and the gelatinization is still carried out at 3: 2 composite according to solid content, changing applying glue liquid concentration is 4%, 6% and 10%, in the applying glue temperature is to carry out top sizing under 50 ℃ the condition, measures every physical strength index of fluting medium, sees Table 2.
Table 2
As can be seen from Table 2, along with the continuous increase of applying glue liquid concentration, its enhancing effect to fluting medium improves gradually.Applying glue liquid concentration is that 6% left and right sides is proper.
In the applying glue temperature is that 50 ℃, applying glue liquid concentration are under 6% the condition, changes the proportioning of waste liquid and starch fluid, and page physical strength index after the mensuration applying glue sees Table 3.
Table 3
As can be seen from Table 3, the appropriate proportioning of waste liquid and starch fluid (solid content ratio) is 3: 2.
Embodiment 2
A kind of waste liquid A-starch glue is to the spray facture of boxboard interlayer, the purified treatment of APMP pulping waste liquor and the gelatinizing method of starch are with embodiment 1, the solid content ratio of the waste liquid A of present embodiment and starch fluid is designed to 2: 1, spray liquid concentration is 10%, the spray temperature is 50 ℃, to spray glue and spray, the wet web behind the spray will be carried out compound, squeezing and dry in each interlayer l Water Paper page frame table.Measure every intensity index of boxboard according to national paper and cardboard method for measuring physical properties, see Table 4 and table 5.
The tensile strength and the ring crush intensity of said method gained boxboard improve 20.7% and 27.8% respectively than blank sample.
Below be the condition optimizing process:
Starch fluid after APMP pulping waste liquor and the gelatinization being carried out composite according to 3: 2 ratio of solid content, change spray liquid concentration, is that the variation of spray liquid concentration sees Table 4 to the influence of boxboard physical strength under 50 ℃ the condition in the spray temperature.
Table 4
As can be seen from Table 4, increase spray liquid concentration, help increasing the physical strength of boxboard.When spray liquid concentration was 10%, the tensile strength of page and ring crush intensity improved 18.4% and 23.1% respectively than blank sample.
In the spray temperature is 50 ℃, and spray liquid concentration is that the proportioning of waste liquid A and starch fluid sees Table 5 to the influence of boxboard physical strength under 10% the condition.
Table 5
As can be seen from Table 5, the appropriate proportioning of waste liquid and starch fluid (solid content ratio) is 2: 1.
Above-mentionedly the high yield pulp pulping waste liquor is used to improve the detailed description that the method for the intensity of fluting medium and cardboard is carried out with reference to embodiment; be illustrative rather than determinate; can list several embodiment according to institute's limited range; therefore; variation and modification not breaking away under the general plotting of the present invention should belong within protection scope of the present invention.
Claims (4)
1. high yield pulp pulping waste liquor, comprise that high yield do not float the pulping waste liquor with bleached chemi-mechanical pulp, it is characterized in that: do not float pulping waste liquor with bleached chemi-mechanical pulp from bleached chemical thermomechanical pulp BCTMP and Alkaline Peroxide Mechanical Pulp APMP and other, insoluble matters such as the fiber fines in employing filter filtration method or the centrifuge centrifugal process removal waste liquid, silt, keep wherein hemicellulose and lignin, and produce to such an extent that remain with the waste liquid A of hemicellulose and lignin, the outward appearance of waste liquid A is little yellow.
One kind adopt claim 1 produce the method for waste liquid A and starch preparation waste liquid A-starch glue, it is characterized in that: compound method is as follows:
1), starch material
Cornstarch, wheaten starch or tapioca;
2), the preparation of gelatinized starch
Get 100～300kg starch, add water and be assigned to concentration 10～25%, in the ammonium persulfate that wherein adds 0.5～1.5%, carry out gelatinization and handle, be warming up to 35～50 ℃, about reaction 10min, continue to be warming up to 85～95 ℃, about insulation 30min, make gelatinization of starch solution;
3), the preparation of waste liquid A-starch glue
The good starch solution of waste liquid A after the processing and gelatinization carried out compositely to contain admittedly than 1: 5～5: 2, make waste liquid A-starch glue.
3. a waste liquid A-starch glue that adopts claim 2 preparation is used to improve the method for the intensity of fluting medium and cardboard, comprise material pond formula size press and membrane type size press, it is characterized in that: described waste liquid A-starch glue is as handling fluting medium and paperboard surface applying glue liquid, fluting medium and cardboard are to self not strict demand of color, applying glue liquid concentration is 4%～10%, temperature is 25 ℃～70 ℃, adopting material pond formula size press or membrane type size press to carry out top sizing handles, page carries out dried and press polish processing in Dryer Section of Paper Machine and calecder section after the applying glue, thereby has improved the tensile strength and the ring crush intensity of fluting medium and cardboard.
4. a waste liquid A-starch glue that adopts claim 2 preparation is used to improve the method for paper board strength, the processing method that comprises spray process, spray glue and nozzle metering device, it is characterized in that: described waste liquid A-starch glue is as spray glue, be used for page between the treatment paper flaggy, described cardboard is to self not strict demand of color, spray glue temperature is 25 ℃-80 ℃, spray concentration is 4%～12%, spray glue sprays at each layer l Water Paper page frame table equably with certain pressure, top layer does not spray processing, carries out the l Water Paper page or leaf behind the spray compound, squeezing and dried.
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Cited By (9)
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| CN102493274A (en) * | 2011-11-30 | 2012-06-13 | 中冶纸业银河有限公司 | Preparation method of starch glue |
| CN102877357A (en) * | 2012-09-11 | 2013-01-16 | 江西弘泰纸业有限公司 | Preparation method of thick paperboard with high bonding strength between paperboards |
| CN103526627A (en) * | 2013-09-04 | 2014-01-22 | 无锡荣成纸业有限公司 | Method for producing compression resistant moisture-proof corrugating medium paper for heavy packaging |
| CN104611992A (en) * | 2014-12-29 | 2015-05-13 | 山东华泰纸业股份有限公司 | Method for improving surface strength of paper |
| WO2018169459A1 (en) * | 2017-03-15 | 2018-09-20 | Sca Forest Products Ab | Method of preparing a sizing boost additive |
| CN109505195A (en) * | 2018-11-07 | 2019-03-22 | 上海昶法新材料有限公司 | A kind of papermaking waste and its preparation method and application |
| CN109715882A (en) * | 2016-09-21 | 2019-05-03 | H·霍格隆德 | Paper or board product comprising at least one layer containing high yield pulp and method for producing the same |
| CN111364284A (en) * | 2020-02-26 | 2020-07-03 | 上海昶法新材料有限公司 | Modified sizing starch, surface sizing liquid, and preparation method and application thereof |
| WO2022129653A1 (en) | 2020-12-18 | 2022-06-23 | Consejo Superior De Investigaciones Cientificas (Csic) | Method for obtaining reinforced packaging paper |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102493274B (en) * | 2011-11-30 | 2014-06-25 | 中冶纸业银河有限公司 | Preparation method of starch glue |
| CN102493274A (en) * | 2011-11-30 | 2012-06-13 | 中冶纸业银河有限公司 | Preparation method of starch glue |
| CN102877357A (en) * | 2012-09-11 | 2013-01-16 | 江西弘泰纸业有限公司 | Preparation method of thick paperboard with high bonding strength between paperboards |
| CN102877357B (en) * | 2012-09-11 | 2015-06-17 | 江西弘泰电子信息材料有限公司 | Preparation method of thick paperboard with high bonding strength between paperboards |
| CN103526627A (en) * | 2013-09-04 | 2014-01-22 | 无锡荣成纸业有限公司 | Method for producing compression resistant moisture-proof corrugating medium paper for heavy packaging |
| CN104611992A (en) * | 2014-12-29 | 2015-05-13 | 山东华泰纸业股份有限公司 | Method for improving surface strength of paper |
| CN109715882A (en) * | 2016-09-21 | 2019-05-03 | H·霍格隆德 | Paper or board product comprising at least one layer containing high yield pulp and method for producing the same |
| CN109715882B (en) * | 2016-09-21 | 2022-07-15 | H·霍格隆德 | Paper or board product comprising at least one ply containing high-yield pulp and method for producing the same |
| WO2018169459A1 (en) * | 2017-03-15 | 2018-09-20 | Sca Forest Products Ab | Method of preparing a sizing boost additive |
| US11041273B2 (en) | 2017-03-15 | 2021-06-22 | Sca Forest Products Ab | Method of preparing a sizing boost additive |
| CN109505195A (en) * | 2018-11-07 | 2019-03-22 | 上海昶法新材料有限公司 | A kind of papermaking waste and its preparation method and application |
| CN111364284A (en) * | 2020-02-26 | 2020-07-03 | 上海昶法新材料有限公司 | Modified sizing starch, surface sizing liquid, and preparation method and application thereof |
| WO2022129653A1 (en) | 2020-12-18 | 2022-06-23 | Consejo Superior De Investigaciones Cientificas (Csic) | Method for obtaining reinforced packaging paper |
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