CN105672020A - Stickies control process in high wet strength paper making process - Google Patents
Stickies control process in high wet strength paper making process Download PDFInfo
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- CN105672020A CN105672020A CN201610058647.9A CN201610058647A CN105672020A CN 105672020 A CN105672020 A CN 105672020A CN 201610058647 A CN201610058647 A CN 201610058647A CN 105672020 A CN105672020 A CN 105672020A
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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 invention relates to the field of papermaking, in particular to a stickies control process in a process of producing high wet strength paper for daily use. The stickies control process comprises the following steps: selecting pulp, dispersing pulp, removing residues, milling, mixing, diluting, screening, shaping on a net, dehydrating and squeezing, drying and wrinkling. Pulp with low ash content is selected, the condition that stickies are produced by cohesion of resins and PAE wet strength agents is avoided, the long fiber proportion is increased, separating and brooming of fibers can be improved, partial wet strength is improved by improving the winding function of finished paper, and usage of the wet strength agents is reduced; moreover, according to a dry strength agent, the utilization efficiency of the wet strength agents can be improved, the dry strength agent has a temporary wet strength agent effect, has no adhesiveness in water and cannot deposit, the wet strength agent is efficiently utilized, a glyoxal polyacrylamide dry strength agent is coordinated with a PAE wet strength agent, the utilization effect of the wet strength agent can be improved due to mixed utilization, and the glyoxal polyacrylamide dry strength agent has no adhesiveness under a wet condition, so that the problem that the wet strength agent is adhered to a felt to cause stickies is solved.
Description
Technical field
The present invention relates to field of papermaking, more specifically stickies control technique in a kind of production strong paper for daily use process of high humidity.
Background technology
The strong paper for daily use of high humidity relates generally to tissue, kitchen paper, medicated napkin etc., and the strong paper for daily use of described high humidity is wet strong main at 20-190N/m. Manufacture paper with pulp in process, require by force owing to wetting higher, add a large amount of PAE type wet strength agent and improve wet strong so that system easily causes Stickies deposit on net and woollen blanket, once generation deposition will result in the problems such as paper generation eye even disconnected paper. In the past by controlling resin in system by interpolation pitch control agent; but it is difficult to control owing to adding the stickies problem that PAE wet strength agent causes in a large number; once occur that Stickies deposit can only be shut down; the method adopting manual cleaning processes, and reduces production efficiency and adds the amount of labour of workman.
Tradition spray adopts the filtrate after plain boiled water filtration, containing substantial amounts of fiber fines and small sicker granule in filtrate, the easy secondary retained of cleaning showers woollen blanket is on net blanket, and filtrate temperature is general at about 40 degree cleaning performances, and tradition drying strengthening agent is used to improve the dry strength of paper.
Tradition wet strength agent is added on groove with slurry, although can increase mixing efficiency, but a large amount of wet strength agent stops the plenty of time in system, it is easy to flocculation is gathered agglomerating, is easily deposited on net blanket after one-tenth.
Summary of the invention
The goal of the invention of the present invention is in that for above weak point of the prior art, it is provided that a kind of high wet strength paper opens stickies control technique in the process of manufacturing paper with pulp.
The present invention is achieved by the following technical solutions:
A kind of high wet strength paper opens stickies control technique in the process of manufacturing paper with pulp, and comprises the steps: the selection of slurry, dissipates slurry, slagging-off, and defibrination is with slurry, dilution, screening, Top wire former, and dewatering press is dried, wrinkling, just rolls up.
Above-mentioned a kind of high wet strength paper opens stickies control technique in the process of manufacturing paper with pulp, and it concretely comprises the following steps:
The selection of slurry: select the content of ashes slurry lower than 0.8%;
Scattered slurry is removed the gred: the long fine pulpboard that concentration is 5-8% carries out dissipating slurry in the fine scattered stock tank of length, and the fluff pulp plate that concentration is 5-8% carries out scattered slurry in the scattered stock tank of short fibre, then removes the gred respectively;
Defibrination: through fiberizer, the long fibre after slagging-off is carried out defibrination, and the beating degree after defibrination is 23 ~ 28 ° of SR, and short fibre is discongested through fluffer;
With slurry: to carry out in pond with slurry with slurry being divided into that stratum reticulare is with slurry and blanket layer is with slurry, regulate that to make stratum reticulare with slurry be 50 ~ 60% short fibres, 40 ~ 50% long fibres; Blanket layer is with slurry for short by fine 30 ~ 40%, long by fine 60 ~ 70%; Stratum reticulare amount of slurry: blanket layer slurry weight is 0.8 ~ 1.2;
Dilution: after blanket layer making beating, beating degree is 28-35 ° of SR, and the concentration of making beating is 4%-5%, and temperature is 35-45 DEG C, and PH is 6-8; Then stratum reticulare is with slurry slurry enters in stratum reticulare machine chest, and blanket layer slurry with slurry enters in blanket layer machine chest after making beating;
Screening: slurry in stratum reticulare machine chest and the slurry in blanket layer machine chest are starched laggard row filter by fan pump punching respectively; Drying strengthening agent and wet strength agent is added in fan pump import department;
Top wire former: slurry enters crescent forming paper machine and manufactures paper with pulp, whitewashing online concentration is 0.1%-0.3%; Shower water adopts the drying cylinder condensed water of 80-100 DEG C, increases and cleans effect;
Dewatering press: pressure roller adopt suction press roll, and squeeze pressure is at 95Kn/m, and slurry enters pressure roller moisture less than 60%, goes out pressure roller moisture less than 45%;
Dry: enter dryer surface and dry, it is ensured that entering guard shield moisture less than 30%, drying cylinder rotating speed controls at 600 ~ 1400m/min, it is ensured that enter guard shield moisture less than 30%;
Wrinkling: to use ceramic blade to carry out making into wrinkling, and interval uses cleaning doctor to continue to use spray limit that drying cylinder coating is modified; Using creping doctor to carry out wrinkling, wrinkling mass dryness fraction is 2 ~ 8%, and wrinkling pressure is 2-6bar, and creping doctor angle is 0-15 °;
Just volume: first winding up roller carries out just volume, controls just to roll up speed so that crepe ratio is 10-18%.
In above-mentioned screening step, drying strengthening agent is: Biformyl polyacrylamide drying strengthening agent.
In above-mentioned screening step, wet strength agent is: PAE type wet strength agent.
Total consumption of described drying strengthening agent and wet strength agent is 10-40kg/t, and the weight ratio of described drying strengthening agent and wet strength agent is 1:3 4:3.
In above-mentioned Top wire former step, middle pressure shower water uses the condensed water of 80 100 DEG C to spray, and spray pressure is 0.1-0.3Mpa. ;
Described shower water is also added with organic solvent, the addition 10-40ml/min of organic solvent.
Described organic solvent is at least one in dimethylbenzene, isopropanol, butyl ester.
Beneficial effects of the present invention:
1. sicker a portion is the resin carried in paper pulp, by selecting the slurry that content of ashes is low to reduce the inlet of system resin, reduce the generation of sicker, fiber after shiny beating is wound around between referring to simultaneously increases, partial intensities can be provided after the wet water hydrogen bond of paper is opened namely wet strong, select the slurry that content of ashes is low, content of ashes is not higher than 0.8%, reduce the resin entering system with slurry, resin is avoided to produce sicker with the cohesion of PAE wet strength agent, improve long fine accounting, long fibre adopts shiny beating, increase the wire-dividing broom purification of fiber, the sufficient wire-dividing broom purification of fiber is ensured at 26 ° of more than SR by controlling beating, improve into the winding effect of paper, there is provided part wet strong, reduce wet strengthening agent.
2. the drying cylinder condensed water adopting high temperature 80-100 DEG C substitutes the filtrate of existing 40 DEG C of degree left and right and carries out cleaning showers, increases and cleans effect;The import of feeding spraying pump adds the organic solvents such as solvent or diluent, makes the clean effect that net blanket has adhered to sicker improve, the high-temperature condensation water of adding portion organic solvent, it is ensured that cleaning performance better, and avoid the secondary deposition of filtrate to pollute
3. the use of drying strengthening agent can improve the utilization ratio of wet strength agent, and avoid the residual of system wet strength agent that the single PAE type wet strength agent of substantial amounts of interpolation causes too much and then problem that wadding is poly-, drying strengthening agent has temporary wet strong effect, and not there is viscosity in water will not deposit, the efficient utilization of wet strength agent, adopt Biformyl polyacrylamide drying strengthening agent and PAE type wet strength agent with the use of, Biformyl polyacrylamide drying strengthening agent can provide part wet potent fruit, and mixing uses the utilizing status that can improve wet strength agent. And Biformyl polyacrylamide drying strengthening agent its when moistening, there is no viscosity, so net blanket will not be sticked to cause stickies problem. The usage ratio of drying strengthening agent and wet strength agent controls between 1:3 4:3;
4. tradition wet strength agent is added on groove with slurry, although can increase mixing efficiency, but a large amount of wet strength agent stops the plenty of time in system, it is easy to flocculation is gathered agglomerating, is easily deposited on net blanket, causes Stickies deposit after one-tenth. The wet strong point of addition of change, adds wet strength agent point selection in fan pump import, enters head box and then molding with the extremely short time, reduce the time of staying, and add the wet strength agent influence of fluctuations to system PH in a large number.
In sum; improve and reduce in production process because stickies problem causes eye problem to ensure the quality of paper, it is to avoid paper machine, because sicker deposits the stop cleaning caused in a large number, improves paper machine operation efficiency; and by dry wet strength agent with the use of, improve wet strength agent utilization rate.
Specific embodiment
In order to be more fully understood that the present invention, describe technical scheme in detail with instantiation below, but the invention is not limited in this.
Embodiment 1:
Producing 28g tissue, the selection of slurry: select the slurry that content of ashes is relatively low, content of ashes is lower than 0.8%, and long fine brand is silver star, chopped fiber brand Carassius auratus.
Scattered slurry is removed the gred: the long fine pulpboard that concentration is 5-8% carries out dissipating slurry in the fine scattered stock tank of length, and the fluff pulp plate that concentration is 5-8% carries out scattered slurry in the scattered stock tank of short fibre, then removes the gred respectively;
Defibrination: through fiberizer, the long fibre after slagging-off is carried out defibrination, and the beating degree after defibrination is 28 ° of SR, and short fibre is discongested through fluffer;
With slurry: to carry out in pond with slurry with slurry being divided into that stratum reticulare is with slurry and blanket layer is with slurry, regulate that to make stratum reticulare with slurry be 50% short fibre, 50% long fibre; Blanket layer is with slurry for short by fine 40%, long by fine 60%; Stratum reticulare amount of slurry: blanket layer slurry weight is 1.0;
Dilution: after blanket layer making beating, beating degree is 32 ° of SR, and the concentration of making beating is 4%-5%, and temperature is 40 DEG C, and PH is 6-8; Then stratum reticulare is with slurry slurry enters in stratum reticulare machine chest, and blanket layer slurry with slurry enters in blanket layer machine chest after making beating;
Screening: slurry in stratum reticulare machine chest and the slurry in blanket layer machine chest are starched laggard row filter by fan pump punching respectively; Add permanent health drying strengthening agent (model HK-204) 8kg/t in fan pump import, be full of rich wet strength agent (model HG-1125) 15kg/t..
Top wire former: slurry enters crescent forming paper machine and manufactures paper with pulp, whitewashing online concentration is 0.18%; Shower water adopts the drying cylinder condensed water of 85 DEG C, increases and cleans the addition butyl ester flow-control of effect spray trickle at 10ml/min;
Dewatering press: pressure roller adopt suction press roll, and squeeze pressure is at 95Kn/m, and slurry enters pressure roller moisture less than 60%, goes out pressure roller moisture less than 45%;
Dry: enter dryer surface and dry, it is ensured that entering guard shield moisture less than 30%, drying cylinder rotating speed controls at 1100m/min, it is ensured that enter guard shield moisture less than 30%;
Wrinkling: to use ceramic blade to carry out making into wrinkling, and interval uses cleaning doctor to continue to use spray limit that drying cylinder coating is modified; Using creping doctor to carry out wrinkling, wrinkling mass dryness fraction is 6%, and wrinkling pressure is 4.5bar, and creping doctor angle is 8 °;
Just volume: first winding up roller carries out just volume, controls just to roll up speed so that crepe ratio is 14%.
This runs 50 hours, paper does not occur that sicker breaks out the halting problem caused, this product with the previous moon to discovery, eye problem significantly reduces, there is no the super large eye of more than diameter 5mm, the eye of more than diameter 1mm reduces 80%, produce shutdown brush car after terminating and do not find the deposition problems of sicker, manufactured paper with pulp by which and extend felt life two weeks, reduce production loss, correction data finds that total dry wet strength agent addition reduces 1kg/t, but in wet anti-bulkage face wet with paper in upper January anti-rise identical, reduce ton paper chemical medicine cost.
Case two:
Producing 32g kitchen paper, the selection of slurry: select the slurry that content of ashes is relatively low, content of ashes is lower than 0.8%, and long fine brand is silver star, and chopped fiber brand is fragrant sub-.
Scattered slurry is removed the gred: the long fine pulpboard that concentration is 5-8% carries out dissipating slurry in the fine scattered stock tank of length, and the fluff pulp plate that concentration is 5-8% carries out scattered slurry in the scattered stock tank of short fibre, then removes the gred respectively;
Defibrination: through fiberizer, the long fibre after slagging-off is carried out defibrination, and the beating degree after defibrination is 29 ° of SR, and short fibre is discongested through fluffer;
With slurry: to carry out in pond with slurry with slurry being divided into that stratum reticulare is with slurry and blanket layer is with slurry, regulate that to make stratum reticulare with slurry be 50% short fibre, 50% long fibre; Blanket layer is with slurry for short by fine 50%, long by fine 50%; Stratum reticulare amount of slurry: blanket layer slurry weight is 1.0;
Dilution: after blanket layer making beating, beating degree is 33 ° of SR, and the concentration of making beating is 4%-5%, and temperature is 40 DEG C, and PH is 6-8; Then stratum reticulare is with slurry slurry enters in stratum reticulare machine chest, and blanket layer slurry with slurry enters in blanket layer machine chest after making beating;
Screening: slurry in stratum reticulare machine chest and the slurry in blanket layer machine chest are starched laggard row filter by fan pump punching respectively; Adding dry agent (model 3300LS) 12kg/t of dry Kemira in fan pump import, east rises wet strength agent (model WS512) 20kg/t..
Top wire former: slurry enters crescent forming paper machine and manufactures paper with pulp, whitewashing online concentration is 0.18%; Shower water adopts the drying cylinder condensed water of 88 DEG C, increases and cleans the addition butyl ester flow-control of effect spray trickle at 10ml/min;
Dewatering press: pressure roller adopt suction press roll, and squeeze pressure is at 95Kn/m, and slurry enters pressure roller moisture less than 60%, goes out pressure roller moisture less than 45%;
Dry: enter dryer surface and dry, it is ensured that entering guard shield moisture less than 30%, drying cylinder rotating speed controls at 800m/min, it is ensured that enter guard shield moisture less than 30%;
Wrinkling: to use ceramic blade to carry out making into wrinkling, and interval uses cleaning doctor to continue to use spray limit that drying cylinder coating is modified; Using creping doctor to carry out wrinkling, wrinkling mass dryness fraction is 6%, and wrinkling pressure is 5.5bar, and creping doctor angle is 8 °;
Just volume: first winding up roller carries out just volume, controls just to roll up speed so that crepe ratio is 13%.
This runs paper and does not occur that sicker breaks out the halting problem that causes, this with front batch of product to discovery, eye problem significantly reduces, it does not have the super large eye of more than diameter 5mm, and the eye of more than diameter 1mm reduces 70%. And under the premise that total consumption remains unchanged wet anti-rise reach 190N/m relatively before improve 25N/m, reached the requirement of physical property normal target value, it was demonstrated that the utilization rate of wet strength agent improves. Woollen blanket and net adhesion without adhesiver thing deposition.
Claims (8)
1. a high wet strength paper opens stickies control technique in the process of manufacturing paper with pulp, it is characterised in that: comprise the steps: the selection of slurry, dissipate slurry, slagging-off, defibrination, with slurry, dilution, screening, Top wire former, dewatering press, dry, wrinkling, just roll up.
2. a kind of high wet strength paper according to claim 1 opens stickies control technique in the process of manufacturing paper with pulp, it is characterised in that:
The selection of slurry: select the content of ashes slurry lower than slurry weight 0.8%;
Scattered slurry is removed the gred: the long fine pulpboard that concentration is 5-8% carries out dissipating slurry in the fine scattered stock tank of length, and the fluff pulp plate that concentration is 5-8% carries out scattered slurry in the scattered stock tank of short fibre, then removes the gred respectively;
Defibrination: through fiberizer, the long fibre after slagging-off is carried out defibrination, and the beating degree after defibrination is 23 ~ 28 ° of SR, and short fibre is discongested through fluffer;
With slurry: to carry out in pond with slurry with slurry being divided into that stratum reticulare is with slurry and blanket layer is with slurry, regulate that to make stratum reticulare with slurry be 50 ~ 60% short fibres, 40 ~ 50% long fibres; Blanket layer is with slurry for short by fine 30 ~ 40%, long by fine 60 ~ 70%; Stratum reticulare amount of slurry: blanket layer slurry weight is 0.8 ~ 1.2;
Dilution: after blanket layer making beating, beating degree is 28-35 ° of SR, and the concentration of making beating is 4%-5%, and temperature is 35-45 DEG C, and PH is 6-8; Then stratum reticulare is with slurry slurry enters in stratum reticulare machine chest, and blanket layer slurry with slurry enters in blanket layer machine chest after making beating;
Screening: slurry in stratum reticulare machine chest and the slurry in blanket layer machine chest are starched laggard row filter by fan pump punching respectively; Drying strengthening agent and wet strength agent is added in fan pump import department;
Top wire former: slurry enters crescent forming paper machine and manufactures paper with pulp, whitewashing online concentration is 0.1%-0.3%; Shower water adopts the drying cylinder condensed water of 80-100 DEG C, increases and cleans effect;
Dewatering press: pressure roller adopt suction press roll, and squeeze pressure is at 95Kn/m, and slurry enters pressure roller moisture less than 60%, goes out pressure roller moisture less than 45%;
Dry: enter dryer surface and dry, it is ensured that entering guard shield moisture less than 30%, drying cylinder rotating speed controls at 600 ~ 1400m/min, it is ensured that enter guard shield moisture less than 30%;
Wrinkling: to use ceramic blade to carry out making into wrinkling, and interval uses cleaning doctor to continue to use spray limit that drying cylinder coating is modified; Using creping doctor to carry out wrinkling, wrinkling mass dryness fraction is 2 ~ 8%, and wrinkling pressure is 2-6bar, and creping doctor angle is 0-15 °;
Just volume: first winding up roller carries out just volume, controls just to roll up speed so that crepe ratio is 10-18%.
3. a kind of high wet strength paper according to claim 2 opens stickies control technique in the process of manufacturing paper with pulp, it is characterised in that: in described screening step, drying strengthening agent is: Biformyl polyacrylamide drying strengthening agent.
4. a kind of high wet strength paper according to claim 2 opens stickies control technique in the process of manufacturing paper with pulp, it is characterised in that: in described screening step, wet strength agent is: PAE type wet strength agent.
5. the one according to any one in claim 2-4, high wet strength paper opens stickies control technique in the process of manufacturing paper with pulp, it is characterized in that: total consumption of described drying strengthening agent and wet strength agent is 10-40kg/t, the weight ratio of described drying strengthening agent and wet strength agent is 1:3 4:3.
6. a kind of high wet strength paper according to claim 2 opens stickies control technique in the process of manufacturing paper with pulp, it is characterised in that: in described Top wire former step, middle pressure shower water uses the condensed water of 80 100 DEG C to spray, and spray pressure is 0.1-0.3Mpa.
7. a kind of high wet strength paper according to claim 2 opens stickies control technique in the process of manufacturing paper with pulp, it is characterised in that: shower water is also added with organic solvent, the addition 10-40ml/min of organic solvent.
8. a kind of high wet strength paper according to claim 7 opens stickies control technique in the process of manufacturing paper with pulp, it is characterised in that: described organic solvent is at least one in dimethylbenzene, isopropanol, butyl ester.
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Cited By (5)
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| CN110004771A (en) * | 2019-03-29 | 2019-07-12 | 广东理文卫生用纸有限公司 | A kind of pulping process of the strong napkin paper of high humidity |
| CN110172856A (en) * | 2019-04-19 | 2019-08-27 | 恒安(中国)纸业有限公司 | A kind of preparation process of the ventilative puerpera's paper handkerchief body paper material of high water absorption |
| CN110230231A (en) * | 2019-06-17 | 2019-09-13 | 联盛纸业（龙海）有限公司 | A kind of cop tube paper and its preparation process |
| CN111636229A (en) * | 2020-05-21 | 2020-09-08 | 山东太阳生活用纸有限公司 | Double-layer roll toilet paper and preparation method thereof |
| CN115216989A (en) * | 2022-08-04 | 2022-10-21 | 汇胜集团股份有限公司 | Preparation method of leather punching packing paper |
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