CN102154919A - Papermaking preparation method - Google Patents
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- CN102154919A CN102154919A CN201010577586XA CN201010577586A CN102154919A CN 102154919 A CN102154919 A CN 102154919A CN 201010577586X A CN201010577586X A CN 201010577586XA CN 201010577586 A CN201010577586 A CN 201010577586A CN 102154919 A CN102154919 A CN 102154919A
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Abstract
The invention discloses a papermaking preparation method which comprises the following steps: under the reaction temperature of 20-65 DEG C, dissolving sodium hydroxide and potassium persulfate in water, uniformly mixing, and reacting for 1-6 hours to obtain a pale yellow solution; adding modified starch with the concentration of 2-8% into the pale yellow solution, uniformly mixing, heating at 80-120 DEG C for 0.5-1h, and pasting to obtain a starch paste solution; adding the starch paste solution into pulp with the concentration of 2-7%, and uniformly mixing; adding the mixed pulp into polyanionic cellulose, and then extruding and concentrating by pulp extruding equipment, so as to enable the concentration of the pulp to be improved to 18-40%; and adding water into the concentrated mixed pulp to dilute, dispersing the pulp, and manufacturing paper. The papermaking preparation method disclosed by the invention remarkably enhances the drying strength and the tearing-resistance strength of the paper, remarkably improves the ring crush strength of the paper and the pulp drainage property, and improves the retention rate of superfine components.
Description
Technical field:
The invention belongs to the paper-making technology field, relate to a kind of papermaking preparation method.
Background technology:
Clearly paper-making industry is defined as key industry in the national industrial policies of in October, 2007 National Development and Reform Committee's issue with sustainable development characteristics.Paper-making industry also is one of industry that a few its increase of production rate surpasses GDP growth rate over nearly 10 years, is showing bright development prospect.
Starch is the storage form of carbohydrate in green plants, is a kind of important renewable and biodegradable natural resources, in paper industry and other industry crucial practical application is arranged.With cereal and tuber crops is that the ative starch that raw material was generated has obtained using widely in many industry.Along with the development of paper industry, it is specific functional more and more to require starch product to have, as better film forming, freeze-thaw stability, cold water soluble, anti-shearing, ageing resistance, anti-salt effect or the like.Starch molecule has a lot of hydroxyls, hydrophily is very strong, but starch granules is water insoluble, even the aging retrogradation of the also very fast generation of gelatinized corn starch liquid that obtains after the abundant gelatinization, this is because be easy to generate the cause of crystallization between the starch hydroxyl by very strong hydrogen bonded and amylose.Cationic starch be use in the converted starch that adds of present paper industry wet end maximum a kind of, it has the high and enhancing good effectiveness of retention, but also there is weak point, as result of use variation when mthod of white water from paper making electrical conductivity and anionic trash concentration are higher, and need to heat gelatinization before adding and be incubated in certain temperature range, otherwise aging layering also takes place easily and lost efficacy.Converted starch has remedied the above-mentioned some shortcomings part of cationic starch, still has good enhancing effect when paper making wet part has bigger variation, even and the paste liquid after the gelatinization also be not easy to take place aging in lower concentration.
Summary of the invention:
The present invention is in order to overcome the deficiencies in the prior art, a kind of dry strength and anti-intensity of tearing that paper can significantly be provided to be provided, obviously improving the novel papermaking preparation method of ring crush intensity and the slurry water filtering performance and the raising retention of paper.
The technical solution adopted for the present invention to solve the technical problems is: a kind of papermaking preparation method may further comprise the steps:
(1) under 20 ℃～65 ℃ reaction temperature, NaOH and potassium peroxydisulfate are dissolved in the water, stir, reacted 1～6 hour, obtain yellow solution;
(2) converted starch is joined in the above-mentioned yellow solution by 2%～18% concentration, stir, obtain starch gelatinization liquid in 80 ℃～120 ℃ heating gelatinization in 0.5～1 hour;
(3) above-mentioned gelatinized corn starch liquid being joined concentration is in 2%～7% the slurry, to mix; Slurry comprises fibrous raw material and papermaking filler;
(4) concentrated with pushing with shove equipment behind the mixed slurry adding polyanion cellulose, extruding concentrates and makes slurry concentration bring up to 18%～40%;
(5) the mixed slurry thin up after will concentrating, dispersed paste is manufactured paper with pulp into paper.
Mention in the above-mentioned steps (3) that fibrous raw material can adopt secondary stock, mechanical pulp, chemical pulp, semi-chemical pulp etc.; Papermaking filler can adopt calcium carbonate, talcum powder, kaolin, titanium dioxide etc.
As further design to the aforementioned techniques scheme: in the above-mentioned steps by the mass percent of gross weight, sodium hydroxide concentration is 1%～7%, the potassium peroxydisulfate consumption is 0.5%～2.5%, and the converted starch consumption is 10%～35%, and the polyanion cellulose consumption is 0.3%～2%.
As the further design to the aforementioned techniques scheme: the converted starch in the step (2) is one or more in oxidized starch, cationic starch, the phosphatide starch.Aforementioned oxidized starch comprises hypochlorite oxidation starch, hydrogen peroxide oxidation starch.The aforementioned male ionic starch comprises starch uncle aminoalkyl ether, quaternary ammonium starch ether.
Papermaking process of the present invention is compared with the papermaking process of prior art, has following advantage:
1, the present invention pushes concentratedly after starch gelatinization to it, can reduce the loss of starch, and the starch retention is more than 85%.
2, the present invention adopts fashion of extrusion to make fiber wrap up one deck starch on every side, has very strong adhesion.
3, oxidized starch, cationic starch, phosphatide starch are based on the domestic market supply, convenient transportation, cheap, and cost is low.
4, the paper that makes by papermaking process of the present invention has improved the ring crush intensity index 15%～25% of paper, and the burst index that improves paper is more than 20%, and can improve and help filter property and dry strength.
5, technology of the present invention is simple, can utilize the existing equipment in paper mill to realize, need not drop into by increase equipment, and the pollution in the minimizing paper-making process.
The specific embodiment:
Below in conjunction with embodiment the present invention is described in further detail.
Embodiment 1
Under 20 ℃ reaction temperature, is sodium hydroxide concentration 1% to be 0.5% to be dissolved in the water with the potassium peroxydisulfate consumption, stir, reacted 1 hour, the converted starch consumption is 10%, 15%, 20%, 25%, 30%, 35%, in 80 ℃ of heating gelatinization in 0.5 hour, extruding concentrates and makes slurry concentration is 25%.Becoming the different concrete effect of starch consumption sees the following form
| Converted starch consumption % | Starch retention % | Bursting strength kpa | Ring crush intensity N |
| 10％ | 96％ | 96 | 93 |
| 15％ | 92.5％ | 108 | 101 |
| 20％ | 90.5％ | 138 | 109 |
| 25％ | 89.3％ | 165 | 113 |
| 30％ | 87.6％ | 186 | 117 |
| 35％ | 85.8％ | 216 | 121 |
Embodiment 2
Under 20 ℃ reaction temperature, is sodium hydroxide concentration 1% to be 0.5% to be dissolved in the water with the potassium peroxydisulfate consumption, stir, reacted 1 hour, the converted starch consumption is 20%, heats gelatinization in 0.5 hour at 80 ℃, and extruding concentrates and makes slurry concentration is 18%, 25%, 30%, 35%, 40%.The different concrete effect of slurry concentration sees the following form
| Converted starch consumption % | Concentration % | Starch is kept % | Bursting strength kpa |
| 20％ | 18％ | 96.7％ | 105 |
| 20％ | 25％ | 93.6％ | 134 |
| 20％ | 30％ | 91.3％ | 162 |
| 20％ | 35％ | 88.7％ | 191 |
| 20％ | 40％ | 86.4％ | 224 |
Embodiment 3
Under 20 ℃ reaction temperature, is sodium hydroxide concentration 1% to be 0.5% to be dissolved in the water with the potassium peroxydisulfate consumption, stir, reacted 1 hour, the converted starch consumption is 20%, be 30min, 40min, 50min, 60min at 80 ℃ of heating gelatinization times, extruding concentrates and makes slurry concentration is 30%.The different concrete effect of slurry concentration sees the following form
| Time min | Starch is kept % | Bursting strength kpa | Ring crush intensity N |
| 30 | 95.3％ | 104 | 95 |
| 40 | 92.1％ | 129 | 102 |
| 50 | 89.5％ | 163 | 109 |
| 60 | 87.4％ | 217 | 116 |
The above only is preferred embodiment of the present invention, is not technology contents of the present invention is done any pro forma restriction.Every foundation technical spirit of the present invention all still belongs in the scope of technical scheme of the present invention any simple modification, equivalent variations and modification that above embodiment did.
Claims (5)
1. papermaking preparation method is characterized in that: may further comprise the steps:
(1) under 20 ℃～65 ℃ reaction temperature, NaOH and potassium peroxydisulfate are dissolved in the water, stir, reacted 1～6 hour, obtain yellow solution;
(2) converted starch is joined in the above-mentioned yellow solution by 2%～18% concentration, stir, obtain gelatinized corn starch liquid in 80 ℃～120 ℃ heating gelatinization in 0.5～1 hour;
(3) above-mentioned gelatinized corn starch liquid being joined concentration is in 2%～7% the slurry, to mix; Slurry comprises fibrous raw material and papermaking filler;
(4) concentrated with pushing with shove equipment behind the mixed slurry adding polyanion cellulose, extruding concentrates and makes slurry concentration bring up to 18%～40%;
(5) the mixed slurry thin up after will concentrating, dispersed paste is manufactured paper with pulp into paper.
2. preparation method according to claim 1, it is characterized in that: the mass percent of pressing gross weight in the above-mentioned steps, sodium hydroxide concentration is 1%～7%, the potassium peroxydisulfate consumption is 0.5%～2.5%, the converted starch consumption is 10%～35%, and the polyanion cellulose consumption is 0.3%～2%.
3. preparation method according to claim 2 is characterized in that: the converted starch in the described step (2) is one or more in oxidized starch, cationic starch, the phosphatide starch.
4. preparation method according to claim 3 is characterized in that: described oxidized starch comprises hypochlorite oxidation starch, hydrogen peroxide oxidation starch.
5. preparation method according to claim 3 is characterized in that: described cationic starch comprises starch uncle aminoalkyl ether, quaternary ammonium starch ether.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010577586XA CN102154919A (en) | 2010-12-03 | 2010-12-03 | Papermaking preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010577586XA CN102154919A (en) | 2010-12-03 | 2010-12-03 | Papermaking preparation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102154919A true CN102154919A (en) | 2011-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010577586XA Pending CN102154919A (en) | 2010-12-03 | 2010-12-03 | Papermaking preparation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104878648A (en) * | 2014-02-28 | 2015-09-02 | 金东纸业（江苏）股份有限公司 | Paper manufacturing method |
| CN109642758A (en) * | 2016-09-14 | 2019-04-16 | 西门子股份公司 | The preparation of starch for paper hydrophobization |
-
2010
- 2010-12-03 CN CN201010577586XA patent/CN102154919A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104878648A (en) * | 2014-02-28 | 2015-09-02 | 金东纸业（江苏）股份有限公司 | Paper manufacturing method |
| CN104878648B (en) * | 2014-02-28 | 2018-03-09 | 金东纸业（江苏）股份有限公司 | The manufacture method of paper |
| CN109642758A (en) * | 2016-09-14 | 2019-04-16 | 西门子股份公司 | The preparation of starch for paper hydrophobization |
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Application publication date: 20110817 |