CN103255678A - Papermaking process and paper produced by same - Google Patents
Papermaking process and paper produced by same Download PDFInfo
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- CN103255678A CN103255678A CN2013101740761A CN201310174076A CN103255678A CN 103255678 A CN103255678 A CN 103255678A CN 2013101740761 A CN2013101740761 A CN 2013101740761A CN 201310174076 A CN201310174076 A CN 201310174076A CN 103255678 A CN103255678 A CN 103255678A
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Abstract
The invention discloses a papermaking process. The papermaking process comprises the steps of: firstly mixing a crosslinking agent, starch and water to obtain mixed liquor, and then adding filler particles into the mixed liquor, wherein the oven dry ratio of the crosslinking agent to the starch is between 0.1:100 and 60:100, and the oven dry ratio of the starch to a filler is between 1:2 and 1:200; heating up and cooking the mixed liquor to enable the starch to be gelatinized and crosslinked to prepare a compound system which contains the filler particles, the crosslinked starch and the water, wherein more than 70% of the outer surfaces of the filler particles is coated with the crosslinked starch; providing slurry, adding the compound system into the slurry and evenly mixing; and making paper by using the slurry, wherein the pure filler particles in the paper account for 1%-70% of the oven dry mass of the paper. The invention also provides the paper made by applying the papermaking process. The papermaking process provided by the invention can be used for effectively reducing the strength loss after the paper is embossed.
Description
Technical field
The paper that the present invention relates to a kind of paper technology and made by this technology.
Background technology
Tissue paper is carried out the aesthetic property that embossing is handled not only can increase tissue paper, can also make tissue paper have better wiping force.Yet, after tissue paper carries out embossing, strength of paper (especially dry strength) can reduce, reason is: the dry strength of paper is mainly provided by the hydrogen bond that forms between fiber and the fiber, in the process that tissue paper is manufactured paper with pulp, usually be added with dry strength agent (as cationic starch), these dry strength agents also can form hydrogen bond with fiber, thereby a part of dry strength is provided.The process of embossing normally makes paper pass in the middle of the knurling rolls group, and in this process, paper is subjected to page that the extruding of knurling rolls group puts in order from a Zhang Ping and is pressed and forms ups and downs state.Through embossing, the shape of the fiber of the recessed and boss of paper and position relation change, and these two variations all might make the hydrogen bond rupture that has formed between fiber and the fiber, thereby strength of paper is reduced.
Security (demand intensity) when guaranteeing that paper uses, will reduce the loss of strength of paper in embossing process as far as possible, common way is by improving the green strength of paper in the industry, as increase long stapled consumption etc., suitably improve or guarantee paper strength after the embossing, but these ways have all more or less increased cost undoubtedly.
Summary of the invention
In view of this, be necessary to provide a kind of preparation technology of paper, this paper can effectively reduce the loss of strength after the embossing.
In addition, also be necessary to provide a kind of paper that above-mentioned preparation technology makes of using.
A kind of paper technology, it comprises the steps:
Earlier with crosslinking agent, starch and water mix the acquisition mixed liquor, in mixed liquor, add filler particles then, wherein the over dry of crosslinking agent and starch is than between 0.1:100 and 60:100, the over dry of starch and filler is than between 1:2 and 1:200, this mixed liquor of intensification boiling makes starch gelatinization, crosslinked, make crosslinked starch-filler compound system, contain filler particles in the complex systems of this crosslinked starch-filler, crosslinked starch and water, wherein crosslinked starch is coated on the outer surface of filler particles, and the filler particles outer surface be coated with crosslinked starch more than 70%;
Slurry is provided, the complex systems of crosslinked starch-filler is directly joined in the slurry and mixes at the green end of paper making;
Use the above-mentioned slurry that is added with the complex systems of crosslinked starch-filler to manufacture paper with pulp and make paper, simple filler particles accounts for the 1%-70% of paper over dry quality in this paper.
A kind ofly use the paper that above-mentioned paper technology makes, be evenly distributed with filler particles in this paper, this filler particles outer surface be coated with crosslinked starch more than 70%, the over dry quality of filler particles accounts for 1%～70% of paper over dry quality in this paper.
The filler particles that paper technology utilization of the present invention surface is coated with crosslinked starch substitutes the part fiber, so fiber consumption reduces relatively, therefore the hydrogen bond between fiber and the fiber can reduce relatively in conjunction with ruined degree, and the fiber number of the embossed conquassation of meeting also can tail off relatively.In addition, this filler particles is that the form with crosslinked starch-filler compound system exists, the oh group on the starch can with fiber in oh group combine with the form of hydrogen bond, thereby make filler particles to stick on the fiber firmly.The existence of filler particles, the effect that intercepts has been played in combination between fiber and the fiber, therefore the hydrogen bond between the fiber is in conjunction with being affected, but, because being the form with crosslinked starch-filler, filler particles exists, a plurality of hydroxyls on a plurality of hydroxyls energy on the crosslinked starch and the contiguous a plurality of fibers form hydrogen bond simultaneously, and the part dry strength is provided.And that the surface is coated with the particle diameter of filler particles of crosslinked starch is less, the effect of external force (as the external force of embossing process) is difficult to directly make filler particles and fiber separation, and a filler particles is simultaneously common and a plurality of fiber forms a plurality of hydroxyls, even therefore have part of hydroxyl destroyed, still have other hydroxyls to remain, so the hydrogen bond energy that forms between crosslinked starch and the fiber keep preferably.Secondly, have plenty of between two adjacent fibers by a plurality of filler particles stacks and link to each other, compared to the situation that directly forms hydrogen bond between fiber and the fiber, distance between adjacent two fibers of paper of the present invention is bigger, such paper more can bear in embossing process because the distortion that high low head causes, significantly reduce the destruction to hydrogen bond, so paper technology of the present invention can effectively reduce the loss of strength after the paper embossing.
The specific embodiment
Paper technology of the present invention, it comprises the steps:
(1) complex systems of preparation crosslinked starch-filler.
(1.1) with crosslinking agent, starch and an amount of mixed crosslinking agent-starch mixed liquor that gets of water, the over dry of its crosslinking agent and starch is than between 0.1:100 and 60:100, preferably between 2:100 and 60:100.This step can preferably be dissolved in crosslinking agent in an amount of water earlier, and wherein the mass ratio of crosslinking agent and water obtains cross-linking agent aqueous solution between 0.05:100 and 235:100, adds starch again in described cross-linking agent aqueous solution, obtains the crosslinked starch mixed liquor.
This starch is selected from one or more in cationic starch, anionic starch, amphoteric starch and the non-ionic starch.
This crosslinking agent be selected from sodium trimetaphosphate, calgon, hexa metaphosphoric acid potassium, phosphorus oxychloride, formaldehyde, acetaldehyde, glyoxal, in glutaraldehyde, epoxychloropropane, epoxy bromopropane, epoxy iodopropane, chloropropylene oxide, polyacrylamide formaldehyde resin, melamine resin, potassium zirconium carbonate, zirconium carbonate ammonium and the isocyanates one or more.
(1.2) add filler particles in crosslinking agent-starch mixed liquor, wherein the over dry of starch and filler is than between 1:2 and 1:200, preferably between 1:2 and 1:100.
Preferably, keep the crosslinked starch mixed liquor to be in the state of stirring when adding filler particles, mixing speed is more than or equal to 2000rpm, can guarantee so to add that whole system is uniform behind the filler particles.
This filler is selected from one or more in talcum powder, kaolin, grinding calcium carbonate, winnofil, Juanyingshi, mineral fibres and the titanium dioxide.
(1.3) continue to stir, the described mixture system of intensification boiling makes starch gelatinization, crosslinked, forms crosslinked starch-filler compound system with filler particles.
Preferably, boiling mixture system temperature is 50-100 ℃, described mixing material is tied up to carry out cooking reaction 4-6 hour under this temperature, guarantees the abundant gelatinization of starch, crosslinked wherein, forms crosslinked starch-filler compound system with filler particles.
Contain filler particles, crosslinked starch and water in the complex systems of this crosslinked starch-filler, wherein crosslinked starch is coated on the outer surface of filler particles, and the filler particles outer surface be coated with crosslinked starch more than 70%.
In this complex systems, the particle size that the surface is coated with the filler particles of crosslinked starch is 0.5-100 μ m.
(2) complex systems of a certain amount of crosslinked starch-filler is directly joined in the paste system and mixes at the green end of paper making.The interpolation point of complex systems can be pulping groove, draining groove, the preceding groove of machine, pressurized screen porch, head box etc.The kind of this slurry can be selected from mechanical pulp, chemical pulp, chemi-mechanical pulp, pure wood pulp, non-wood pulp, reclaim one or more the mixing in the slurry, and slurry can be to handle through defibrination, also can not carry out defibrination and handle.
(3) use the above-mentioned slurry that is added with the complex systems of crosslinked starch-filler to manufacture paper with pulp and make paper.Simple filler particles accounts for the 1%-70% of paper over dry quality in this paper.
A kind of paper that is made by said method is evenly distributed with filler particles in this paper, and the filler particles outer surface be coated with crosslinked starch more than 70%.The crosslinked starch of filler particles outer surface with the form of associative key and paper fibre in conjunction with (hydroxyl on the crosslinked starch can with the hydroxyl of fiber etc. in conjunction with forming hydrogen bond), thereby filler particles is attached on the paper fibre closely.Pure filler particles accounts for the 1%-70% of paper over dry quality in this paper.The particle size that the surface is coated with the filler particles of crosslinked starch is 0.5 μ m-100 μ m.
Filler particles in this paper distributes more even relatively at three-dimensional, concrete reason is: composite body is liquid and has certain viscosity, this viscosity can effectively assist filler particles in the process of manufacturing paper with pulp good adhesive force on the three-dimensional of fiber; The hydroxyl generation hydrogen bond of crosslinked starch on fiber is combined, in the process of follow-up dehydration, squeezing and drying, can not make filler particles skewness on three-dimensional especially Z-direction because of the influence of other factors such as gravity, thereby guarantee that filler particles can evenly distribute on the three-dimensional of paper.
In the paper embossing process, the fiber of the recessed and boss of paper is owing to exist high low head, and fiber is drawn back certain distance, and the hydrogen bond that forms between fiber and the fiber has part destroyed, and have the part fiber can be by conquassation, this will make strength of paper descend.
And paper technology of the present invention can effectively reduce the loss of strength after the embossing, concrete reason is analyzed as follows: the filler particles that (A) utilizes the surface to be coated with crosslinked starch substitutes the part fiber, so fiber consumption reduces relatively, therefore the hydrogen bond between fiber and the fiber can reduce relatively in conjunction with ruined degree, and can also can be tailed off relatively by the fiber number of conquassation.(B) in addition, it is less that the surface is coated with the particle diameter of filler particles of crosslinked starch, the effect of external force (as the external force of embossing process) is difficult to directly make filler particles and fiber separation, and a filler particles is simultaneously common and a plurality of fiber forms a plurality of hydroxyls, even therefore have part of hydroxyl destroyed, still have other hydroxyls to remain, so the hydrogen bond energy that forms between crosslinked starch and the fiber keep preferably.(C) secondly, have plenty of between two adjacent fibers by a plurality of filler particles stacks and link to each other, compared to the situation that directly forms hydrogen bond between fiber and the fiber, distance between adjacent two fibers of paper of the present invention is bigger, such paper more can bear in embossing process because the distortion that high low head causes, therefore significantly reduce the destruction to hydrogen bond, can better keep the dry strength of paper after the embossing.
In the process of test paper strength, paper can be in the most weak place fracture, in the moment of fracture, the power of the maximum that measuring head traction paper reaches is this strength of paper, if filler distribution is inhomogeneous in the paper, in the process of embossing, there is not the less zone of filler distribution or filler distribution, the loss of its pulling force can be big especially, and during strength of paper, paper zone in this section can rupture easily after the test embossing.And the filler distribution in the paper of the present invention is even, therefore can better keep paper strength, also is beneficial to the loss of strength that reduces embossing.
Come the present invention is specifically described below by embodiment.
Embodiment
Earlier the crosslinking agent sodium trimetaphosphate is dissolved in a certain amount of water, be mixed with concentration and be 5% cross-linking agent aqueous solution, with this aqueous solution cationic starch is made into the solution system of 2% room temperature again, the over dry ratio of sodium trimetaphosphate and cationic starch is 1:10, this starch solution of vigorous stirring stirs and makes it even under the rotating speed of 2000rpm, simultaneously to wherein adding calcium carbonate granule, calcium carbonate is 10:1 with the over dry ratio of cationic starch, after treating that calcium carbonate powder adds fully and evenly disperseing, continue to keep this mixing speed, simultaneously, it is 70 ℃ that this system heating is made its temperature, react after 4 hours, it is crosslinked that crosslinking agent and cationic starch are taken place, gelatinization, wherein, the mechanism of cross-linking reaction is that alcoholic extract hydroxyl group and the sodium trimetaphosphate of starch forms diester linkage, make between the starch molecule and build bridge together, form crosslinked starch, owing to be mixed with calcium carbonate powder uniformly in the system, crosslinked starch also covers the surface of calcium carbonate granule simultaneously in the process that forms, finally form crosslinked starch-compound of calcium carbonate system; This compound directly added before the machine mix with slurry in the groove, with slurry through online, dehydration, squeezing, drying such as batches at technology, finally forms paper.
Comparative Examples
Adopt identical method (squeezing, drying such as batches at technology for online, dehydration) to make paper in slurry identical among the embodiment (not adding compound).
The paper that embodiment and Comparative Examples are made carries out longitudinal pulling force before the embossing and the test of lateral pull, use identical knurling rolls and embossing condition that two kinds of paper are carried out testing respectively after the embossing longitudinal pulling force and lateral pull after the embossing respectively again then, test result is as shown in the table, wherein paper strength * 100% before embossing loss of strength rate=(paper strength after the preceding paper strength-embossing of embossing)/embossing.
Annotate: because the restriction of the process of manufacturing paper with pulp, longitudinal pulling force and the lateral pull of the paper of uncontrollable embodiment and Comparative Examples are identical, but the variation in tension of two kinds of paper that provide is very little, can be considered to not have notable difference.
From test result as can be known: the embossing loss late of embodiment paper is significantly less than the embossing loss late of Comparative Examples paper, illustrates that the embodiment paper has kept the dry strength of paper better in embossing process.
In addition, those skilled in the art also can make various modifications, interpolation and the replacement on other form and the details in claim of the present invention scope of disclosure and spirit.Certainly, these all should be included within the present invention's scope required for protection according to the variations such as various modifications, interpolation and replacement that spirit of the present invention is made.
Claims (13)
1. paper technology, it comprises the steps:
Earlier crosslinking agent, starch and water are mixed and obtain mixed liquor, in mixed liquor, add filler particles then, wherein the over dry of crosslinking agent and starch is than between 0.1:100 and 60:100, the over dry of starch and filler is than between 1:2 and 1:200, this mixed liquor of boiling makes starch gelatinization, crosslinked, make crosslinked starch-filler compound system, contain filler particles, crosslinked starch and water in the complex systems of this crosslinked starch-filler, wherein crosslinked starch is coated on the outer surface of filler particles, and the filler particles outer surface be coated with crosslinked starch more than 70%;
Slurry is provided, the complex systems of crosslinked starch-filler is directly joined in the slurry and mixes at the green end of paper making;
Use the above-mentioned slurry that is added with the complex systems of crosslinked starch-filler to manufacture paper with pulp and make paper, simple filler particles accounts for the 1%-70% of paper over dry quality in this paper.
2. paper technology as claimed in claim 1 is characterized in that: the over dry of this crosslinking agent and starch is than between 2:100 and 60:100.
3. paper technology as claimed in claim 1 is characterized in that: the over dry of this starch and filler is than between 1:2 and 1:100.
4. paper technology as claimed in claim 1, it is characterized in that: this starch is selected from one or more in cationic starch, anionic starch, amphoteric starch and the non-ionic starch.
5. paper technology as claimed in claim 1 is characterized in that: this crosslinking agent be selected from sodium trimetaphosphate, calgon, hexa metaphosphoric acid potassium, phosphorus oxychloride, formaldehyde, acetaldehyde, glyoxal, in glutaraldehyde, epoxychloropropane, epoxy bromopropane, epoxy iodopropane, chloropropylene oxide, polyacrylamide formaldehyde resin, melamine resin, potassium zirconium carbonate, zirconium carbonate ammonium and the isocyanates one or more.
6. paper technology as claimed in claim 1, it is characterized in that: this filler is selected from one or more in talcum powder, kaolin, grinding calcium carbonate, winnofil, Juanyingshi, mineral fibres and the titanium dioxide.
7. paper technology as claimed in claim 1, it is characterized in that: the step that obtains mixed liquor is that crosslinking agent is dissolved in the water, wherein the mass ratio of crosslinking agent and water is between 0.05:100 and 235:100, obtain cross-linking agent aqueous solution, add starch again in the described cross-linking agent aqueous solution and obtain mixed liquor.
8. paper technology as claimed in claim 1 is characterized in that: add filler particles and keep in mixed liquor the time mixed liquor to be in the state of stirring, and mixing speed is more than or equal to 2000rpm.
9. paper technology as claimed in claim 1, it is characterized in that: the particle size that the surface is coated with the filler particles of crosslinked starch is 0.5-100 μ m.
10. paper technology as claimed in claim 1, it is characterized in that: the temperature of this mixed liquor of boiling is 50-100 ℃.
11. paper technology as claimed in claim 1 is characterized in that: the interpolation point of the complex systems of this crosslinked starch-filler is groove before pulping groove, draining groove, the machine, pressurized screen porch or head box.
12. paper technology as claimed in claim 1 is characterized in that: this slurry is selected from mechanical pulp, chemical pulp, chemi-mechanical pulp, pure wood pulp, non-wood pulp, reclaim one or more the mixing in the slurry.
13. an application rights requires any paper that described paper technology makes among the 1-12, be evenly distributed with filler particles in this paper, this filler particles outer surface be coated with crosslinked starch more than 70%, the over dry quality of filler particles accounts for 1%～70% of paper over dry quality in this paper.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310174076.1A CN103255678B (en) | 2013-05-13 | 2013-05-13 | Paper technology and the paper obtained by it |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310174076.1A CN103255678B (en) | 2013-05-13 | 2013-05-13 | Paper technology and the paper obtained by it |
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| CN103255678A true CN103255678A (en) | 2013-08-21 |
| CN103255678B CN103255678B (en) | 2016-06-08 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106012661A (en) * | 2016-05-20 | 2016-10-12 | 苏州倍力特物流设备有限公司 | Reinforced composite paperboard and preparation method thereof |
| CN107012727A (en) * | 2017-03-30 | 2017-08-04 | 天长市天达纸箱纸品厂 | A kind of preparation method of papermaking special calcium carbonate filler |
| CN109056418A (en) * | 2018-09-07 | 2018-12-21 | 宿州学院 | A kind of preparation method of manila paper |
| CN110003686A (en) * | 2019-05-06 | 2019-07-12 | 长沙理工大学 | The preparation method and application of paper grade (stock) heavy calcium carbonate filling |
| CN113661290A (en) * | 2019-04-02 | 2021-11-16 | 凯米拉公司 | Paper strength enhancement using metal chelates and synthetic cationic polymers |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101255666A (en) * | 2008-03-18 | 2008-09-03 | 陕西科技大学 | Method for manufacturing corpuscle filling material-starch complexes papermaking filling material |
| CN101570947A (en) * | 2009-05-25 | 2009-11-04 | 金东纸业（江苏）股份有限公司 | Method for applying starch modified stuffing in paper making |
-
2013
- 2013-05-13 CN CN201310174076.1A patent/CN103255678B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101255666A (en) * | 2008-03-18 | 2008-09-03 | 陕西科技大学 | Method for manufacturing corpuscle filling material-starch complexes papermaking filling material |
| CN101570947A (en) * | 2009-05-25 | 2009-11-04 | 金东纸业（江苏）股份有限公司 | Method for applying starch modified stuffing in paper making |
Non-Patent Citations (2)
| Title |
|---|
| 刘温霞等: "造纸填料的包覆改性——提高加填纸张的强度性能", 《中华纸业》, vol. 31, no. 24, 23 December 2010 (2010-12-23), pages 6 - 11 * |
| 韩晨: "淀粉包覆PCC在造纸中的制备与应用研究", 《南京林业大学硕士学位论文》, 15 February 2010 (2010-02-15) * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106012661A (en) * | 2016-05-20 | 2016-10-12 | 苏州倍力特物流设备有限公司 | Reinforced composite paperboard and preparation method thereof |
| CN107012727A (en) * | 2017-03-30 | 2017-08-04 | 天长市天达纸箱纸品厂 | A kind of preparation method of papermaking special calcium carbonate filler |
| CN107012727B (en) * | 2017-03-30 | 2019-05-24 | 天长市天达纸箱纸品厂 | A kind of preparation method of papermaking special calcium carbonate filler |
| CN109056418A (en) * | 2018-09-07 | 2018-12-21 | 宿州学院 | A kind of preparation method of manila paper |
| CN113661290A (en) * | 2019-04-02 | 2021-11-16 | 凯米拉公司 | Paper strength enhancement using metal chelates and synthetic cationic polymers |
| US11834792B2 (en) | 2019-04-02 | 2023-12-05 | Kemira Oyj | Paper strength improvement using metal chelates and synthetic cationic polymers |
| CN110003686A (en) * | 2019-05-06 | 2019-07-12 | 长沙理工大学 | The preparation method and application of paper grade (stock) heavy calcium carbonate filling |
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| CN103255678B (en) | 2016-06-08 |
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