CN103397567B - Paper technology - Google Patents
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- CN103397567B CN103397567B CN201310336691.8A CN201310336691A CN103397567B CN 103397567 B CN103397567 B CN 103397567B CN 201310336691 A CN201310336691 A CN 201310336691A CN 103397567 B CN103397567 B CN 103397567B
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Abstract
A kind of paper technology, it comprises the steps: pva powder to add water and makes the abundant swollen of polyvinyl alcohol; Make an addition in slurry by the polyvinyl alcohol after swollen, the absolute dry mass adding polyvinyl alcohol is 0.1% ~ 3.0% of pulp fiber absolute dry mass; Use this slurry to carry out copy paper, obtain wet web; Use at least one section of drying cylinder to carry out drying to wet web and obtain paper, and the temperature of initial segment drying cylinder is set to 58 ~ 60 DEG C.The polyvinyl alcohol of swollen by carrying out swollen process to polyvinyl alcohol, then is made an addition to slurry by the present invention, and the polyvinyl alcohol after swollen can effectively from the gap being retained in page fibrous reticular structure.In addition, by adjusting traditional initial segment dryer temperature, making polyvinyl alcohol at the inner Flashmelt of body paper, making PVA mutual strong bond between fiber and filler.
Description
Technical field
The present invention relates to a kind of paper technology.
Background technology
The intensity of general paper mainly contains inherent bond strength and surface strength two aspect of paper, and wherein the bulk strength of inherent bond strength to paper plays key effect.For coated paper, the change of body paper intensity is the most important to the coated paper intensity effect after coating ornamenting, and thus promoting body paper intensity is that the basis of follow-up high strength coated paper of manufacturing paper with pulp is with crucial.At present, field of papermaking, the measure promoting body paper intensity mainly contains to be optimized wet end furnish and the press dewatering of defibrination controls, improvement system retains and body paper interweaves, optimizes body paper and drying and moulding, improves the optimum Match etc. of engine sizing and top sizing.
It is existing for many years that water-soluble poval (PVA) is applied to field of papermaking, main as paper product adhesive.The at present not application PVA case of manufacturing paper with pulp in bodystock paper, mainly because of without the PVA powder after swollen easily at body paper melt surface, the paper defects of interruption or the phenomenon such as continuous print coating holiday or kerf when causing follow-up coating waste water; And completely after gelatinization the temperature of PVA(PVA gelatinization at about 80 ~ 100 degree) because of its surperficial uncharged characteristic, its major part runs off and manufactures paper with pulp in the water body of process in body paper, cannot obtain the object of body paper strength enhancing.
Summary of the invention
In view of this, be necessary to provide a kind of paper technology, it utilizes polyvinyl alcohol (PVA) to promote body paper intensity.
A kind of paper technology, it comprises the steps:
Pva powder is added water and makes the abundant swollen of polyvinyl alcohol;
Make an addition in slurry by the polyvinyl alcohol after swollen, the absolute dry mass adding polyvinyl alcohol is 0.1% ~ 3.0% of pulp fiber absolute dry mass;
Use this slurry to carry out copy paper, obtain wet web;
Use at least one section of drying cylinder to carry out drying to wet web and obtain paper, and the temperature of initial segment drying cylinder is set to 58 ~ 60 DEG C.
The PVA powder of this swollen by carrying out swollen process to PVA powder, then is made an addition to slurry by the present invention, and the PVA after swollen can effectively from the gap being retained in page fibrous reticular structure.In addition, by adjusting traditional initial segment dryer temperature, make PVA at the inner Flashmelt of body paper, make PVA mutual strong bond between fiber and filler, thus avoid traditional low temperature, at a slow speed drying cause melting after PVA permeate in a large number in body paper surface, cause the quality defect of post-coatings holiday or kerf.
Detailed description of the invention
The paper technology of present pre-ferred embodiments, it comprises the steps:
(1) polyvinyl alcohol (PVA) powder added water and make the abundant swollen of PVA.
The swollen temperature of this PVA powder is 30 ~ 50 DEG C, and particle diameter is 0.001 ~ 0.20mm.PVA powder and water can be mixed into solution by this step, and wherein in solution, the mass percentage concentration of PVA is 0.5% ~ 1.0%, and control solution temperature is under the condition of 45 ~ 50 DEG C and keeps stirring, and mixing time is 0.5 ~ 5 hour.
(2) PVA after described abundant swollen is made an addition in slurry.
This step specifically can be PVA and adds at the interval of loose slurry to head case (loose stock tank → discharging tower → medial launder → pulping tower → blending chest → paper machine stock tank → fan pump → pressurized screen → head case) arbitrary interpolation point of slurry linear flow journey, be mixed in paste system.
The absolute dry mass adding PVA in this step is 0.1% ~ 3.0% of pulp fiber absolute dry mass.
(3) by blended to filler, PVA powder and water formation mixture, and make the PVA swollen in mixture, afterwards described mixture is made an addition to slurry.
This step is optional step, also can omit.
This step specifically can be: be that PVA powder and the appropriate water of 0.1% ~ 3.0% of the absolute dry mass of filler is mixed to form mixture by filler, quality, and the temperature controlling mixture is under the condition of 45 ~ 50 DEG C and keeps stirring, until PVA swollen; Then described mixture is made an addition to slurry, wherein in mixture, the amount of filler is the amount of filler that papermaking routine is added.
PVA after swollen has stronger caking property and moulding property, and it is by the surface of coated filler particles.The elasticity of filler appropriateness can be given after PVA after swollen is coated on filling surface, be beneficial to the gap that it is filled into page fibrous web-like layer.
(4) use this slurry to carry out copy paper, obtain wet web.
(5) use at least one section of drying cylinder to carry out drying to wet web and obtain paper, and the temperature of initial segment drying cylinder is set to 58 ~ 60 DEG C.
The temperature of usual initial segment drying cylinder is set to about 40 DEG C, raising initial segment dryer temperature is 58 ~ 60 DEG C of PVA Flashmelts that can make swollen in wet web, play interfibrous mutual bonding or fibre-filler-interfibrous mutual bonding, thus obtain the significantly lifting of body paper intensity.
The PVA powder of this swollen by carrying out swollen process to PVA powder, then is made an addition to slurry by the present invention, and the PVA after swollen can effectively from the gap being retained in page fibrous reticular structure; If made an addition to after in slurry by the mixture containing swollen PVA powder and filler simultaneously, effect of body paper ash content and the two lifting of intensity can be obtained.In addition, by adjusting traditional initial segment dryer temperature, make PVA at the inner Flashmelt of body paper, make PVA mutual strong bond between fiber and filler, thus avoid traditional low temperature, at a slow speed drying cause melting after PVA permeate in a large number in body paper surface, cause the quality defect of post-coatings holiday or kerf.
Below by specific embodiment, the present invention is described further.
Comparative example 1
In the blending chest getting slurry linear flow journey, (include wet end furnish is mixed slurry: bleached softwood wood sulfate pulp (NBKP)/bleaching broad-leaved wood sulphate pulp (LBKP)/Alkaline Peroxide Mechanical Pulp (APMP)=30/50/20, slurry concentration is 4%) obtained wet handsheet, then handsheet is obtained through two sections of cylinder drieds (initial segment dryer temperature is 58 ~ 60 DEG C, and second segment dryer temperature is 95 ~ 100 DEG C).
Comparative example 2
In the blending chest getting slurry linear flow journey, mixed slurry (including wet end furnish is NBKP/LBKP/APMP=30/50/20, and slurry concentration is 4%) adds the filler (for oven dry stock) of 20% under stirring, the wet handsheet obtained; Then handsheet is obtained afterwards through two sections of cylinder drieds (initial dryer temperature is 58 ~ 60 DEG C, and second segment dryer temperature is 95 ~ 100 DEG C).
Embodiment 1
Under PVA solution (concentration is 0.5wt%) good for swollen in advance is slowly made an addition to stirring, (including wet end furnish is NBKP/LBKP/APMP=30/50/20 for the mixed slurry of (mixing speed is 1000r/min), slurry concentration is 4%) in, the absolute dry mass that PVA adds is 0.1% of pulp fiber absolute dry mass, obtained wet handsheet obtains handsheet afterwards through two sections of cylinder drieds (initial dryer temperature is 58 ~ 60 DEG C, and redrying dryer temperature is 95 ~ 100 DEG C).
Embodiment 2
Under the PVA aqueous solution (concentration is 1.0wt%) good for swollen in advance is slowly made an addition to stirring, (including wet end furnish is NBKP/LBKP/APMP=30/50/20 for the mixed slurry of (mixing speed is 1000r/min), slurry concentration is 4%) in, the absolute dry mass that PVA adds is that 3.0%(is for oven dry stock), obtained wet handsheet obtains handsheet afterwards through two sections of cylinder drieds (initial dryer temperature is 58 ~ 60 DEG C, and redrying dryer temperature is 95 ~ 100 DEG C).
Embodiment 3
Under the PVA aqueous solution (concentration is 1.0wt%) good for swollen in advance is slowly made an addition to stirring, (including wet end furnish is NBKP/LBKP/APMP=30/50/20 for the mixed slurry of (mixing speed is 1000r/min), slurry concentration is 4%) in, the absolute dry mass that PVA adds is 3.0% of pulp fiber absolute dry mass; Interval is after 15 seconds, add in mixed slurry again under stirring through blended with swollen process after the mixture (in mixture, PVA addition is 1.0% of over dry packing quality) of PVA powder and filler, the addition of filler is that 20%(is for oven dry stock), obtained wet handsheet obtains handsheet afterwards through two sections of cylinder drieds (initial dryer temperature is 58 ~ 60 DEG C, and redrying dryer temperature is 95 ~ 100 DEG C).
The performance test results of the handsheet obtained by embodiment 1-3 and comparative example 1-2 is as following table.
Test result from upper table: compared with the handsheet not adding filler with comparative example 1, the strength character that embodiment 1-2 does not add the handsheet of filler has remarkable lifting, and the strength character that effectively can promote paper in the PVA solution that slurry interpolation swollen is good is described; Compared with adding Packed handsheet with comparative example 2, the strength character that embodiment 3 adds the handsheet that same amount filler obtains has significant lifting, and content of ashes also has remarkable lifting, the mixture of PVA solution good for swollen and PVA and the blended rear swollen of filler makes an addition in slurry by this explanation, can obtain effect of greyness of paper and the two lifting of intensity; Embodiment 1-2 compares, and illustrates to a certain extent, and the addition of PVA is larger, and the effect promoting the strength character of paper is more obvious.
In addition, those skilled in the art also can make various amendments in other form and details, interpolation and replacement in the claims in the present invention scope of disclosure and spirit.Certainly, the changes such as these various amendments made according to the present invention's spirit, interpolation and replacement, all should be included within the present invention's scope required for protection.
Claims (7)
1. a paper technology, it comprises the steps:
Added water by pva powder, the mixeding liquid temperature controlling pva powder and water is under the condition of 45 ~ 50 DEG C and maintenance stirring 0.5-5 hour, makes the abundant swollen of polyvinyl alcohol;
Make an addition in slurry by the polyvinyl alcohol after swollen, the absolute dry mass adding polyvinyl alcohol is 0.1% ~ 3.0% of pulp fiber absolute dry mass;
Use this slurry to carry out copy paper, obtain wet web;
Use at least one section of drying cylinder to carry out drying to wet web and obtain paper, and the temperature of initial segment drying cylinder is set to 58 ~ 60 DEG C.
2. paper technology as claimed in claim 1, is characterized in that: the swollen temperature of this pva powder is 30 ~ 50 DEG C.
3. paper technology as claimed in claim 1, is characterized in that: the particle diameter of this pva powder is 0.001 ~ 0.20mm.
4. paper technology as claimed in claim 1, is characterized in that: in the mixed liquor of pva powder and water, the mass percentage concentration of polyvinyl alcohol is 0.5% ~ 1.0%.
5. paper technology as claimed in claim 1, it is characterized in that: before this technique is also included in and utilizes slurry to carry out copy paper, add the step of mixture in the slurry, this mixture is that the polyvinyl alcohol after swelling is coated on filling surface by again that polyvinyl alcohol is swelling after blended to filler, pva powder and water.
6. paper technology as claimed in claim 5, is characterized in that: in this mixture, the quality of polyvinyl alcohol is 0.1% ~ 3.0% of the absolute dry mass of filler.
7. paper technology as claimed in claim 5, is characterized in that: the temperature making the step of polyvinyl alcohol swollen in mixture be specially control mixture is under the condition of 45 ~ 50 DEG C and keeps stirring.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310336691.8A CN103397567B (en) | 2013-08-05 | 2013-08-05 | Paper technology |
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| CN201310336691.8A CN103397567B (en) | 2013-08-05 | 2013-08-05 | Paper technology |
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| CN103397567A CN103397567A (en) | 2013-11-20 |
| CN103397567B true CN103397567B (en) | 2015-12-02 |
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| CN201310336691.8A Active CN103397567B (en) | 2013-08-05 | 2013-08-05 | Paper technology |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104499355A (en) * | 2014-11-25 | 2015-04-08 | 南通四通林业机械制造安装有限公司 | Textured base paper dipping production technology |
| CN104499379B (en) * | 2014-12-31 | 2017-02-22 | 东莞市汇林包装有限公司 | Preparation method of anti-dusting pulp mold |
| CN107304531A (en) * | 2016-08-23 | 2017-10-31 | 如皋长江科技产业有限公司 | A kind of efficient paper technology |
| CN111663367A (en) * | 2019-03-08 | 2020-09-15 | 天津大学 | Manufacturing method for clean production of pulping and papermaking based on CMC-NA liquid system |
| CN112796152A (en) * | 2020-12-30 | 2021-05-14 | 冠宏化工（扬州）有限公司 | Organically modified filler, preparation method thereof and papermaking process using filler |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59192799A (en) * | 1983-04-13 | 1984-11-01 | 電気化学工業株式会社 | Papermaking internal filler |
| WO1998055694A1 (en) * | 1997-06-04 | 1998-12-10 | Rhodia Chimie | Method for making paper using a gelling system |
| CN101994276A (en) * | 2009-08-13 | 2011-03-30 | 上海嘉龙纸业有限公司 | Method for preparing higher-quality paper from waste compound paper source recycled paper pulp |
| CN102392391A (en) * | 2011-10-31 | 2012-03-28 | 陕西科技大学 | Filling method adopting polyvinyl alcohol as filler adhesive among pieces of paper |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101280533A (en) * | 2008-04-25 | 2008-10-08 | 陕西科技大学 | Method for preparing low quantitative paper sheets |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59192799A (en) * | 1983-04-13 | 1984-11-01 | 電気化学工業株式会社 | Papermaking internal filler |
| WO1998055694A1 (en) * | 1997-06-04 | 1998-12-10 | Rhodia Chimie | Method for making paper using a gelling system |
| CN101994276A (en) * | 2009-08-13 | 2011-03-30 | 上海嘉龙纸业有限公司 | Method for preparing higher-quality paper from waste compound paper source recycled paper pulp |
| CN102392391A (en) * | 2011-10-31 | 2012-03-28 | 陕西科技大学 | Filling method adopting polyvinyl alcohol as filler adhesive among pieces of paper |
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