CN104611991A - Dry strength agent used for enhancing paper tension, and preparation method and application thereof - Google Patents
Dry strength agent used for enhancing paper tension, and preparation method and application thereof Download PDFInfo
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- CN104611991A CN104611991A CN201410713139.0A CN201410713139A CN104611991A CN 104611991 A CN104611991 A CN 104611991A CN 201410713139 A CN201410713139 A CN 201410713139A CN 104611991 A CN104611991 A CN 104611991A
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- dry strength
- strength agent
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- cellulose
- paper pull
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Abstract
The invention relates to a preparation method of a dry strength agent used for enhancing paper tension. The preparation method comprises the following steps: S1, water, an emulsifying and dispersing agent and cellulose are mixed into a cellulose emulsion; S2, the cellulose emulsion is well mixed by stirring, and soaking is carried out for 2h; the temperature is increased to 45-55 DEG C, and an initiator is added, such that the PH value of the solution is regulated to 7-8; S3, a polymer water solution is added; a reaction is allowed for 3-5h; cooling is carried out; and a PH adjusting agent is added, such that the PH value of the solution is adjusted to 6-8; S4, a viscosity stabilizing agent is added, and the mixture is well mixed by stirring; a measured substitution degree is 0.03-0.06; and a solid product is collected, wherein the solid product is the prepared paper tension dry strength agent. The process provided by the invention is simple, and application process is short. The dry strength agent does not contain harmful substances such as formaldehyde and benzene. With the method, no harmful by-product is produced, and the environment is not polluted. The product provided by the invention has a stable viscosity. With the product, paper tension can be effectively improved. When in use, the dry strength agent is soaked and diluted with water, and the diluted agent can be directly added into paper pulp. The dry strength agent has the characteristics such as simple and convenient application and low loss rate.
Description
Technical field
The invention belongs to the function additive in pulping and papermaking processes, be specifically related to a kind of for dry strength agent strengthening paper pull and its preparation method and application.
Background technology
Pulp and paper industry is along with a large amount of uses of secondary stock raw material and high yield pulp1 slurry, and the internal bond strength of paper is deteriorated, and pulling force reduces, thus causes paper mill in the process of manufacturing paper with pulp, occurs the paper that breaks.Existing solution increases primary long stuff consumption, or add cationic starch and polyacrylamide analog assistant, but the former needs a large amount of wood raw material; And the latter is run off greatly, contaminated wastewater is serious.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the object of this invention is to provide a kind of for dry strength agent strengthening paper pull and its preparation method and application, this Study of Paper-Strengthening Agent Based can strengthen the internal bond strength of paper, the effect of polymer is utilized to improve paper fibre intensity, the turnover rate of dry strength agent is low, the pollution to environment when reducing wastewater treatment.
For achieving the above object, the technical solution used in the present invention is: a kind of preparation method of paper pull dry strength agent comprises the following steps:
Step S1, is mixed into cellulose emulsion by water, emulsifying dispersant and cellulose;
Step S2, soaks 2 hours after being stirred by cellulose emulsion, then is warming up to 45-55 degree Celsius, then to add initator regulator solution pH value be 7-8;
Step S3, adds aqueous solutions of polymers, reaction 3-5 hour, cooling, then to add PH adjusting agent adjustment solution pH value be 6-8;
Step S4, adds viscosity stabiliser, stirs, and recording substitution value is 0.03-0.06, then collects solid product wherein, and this solid product is obtained paper pull dry strength agent.
Preferred technical scheme, in described step S1, in cellulose emulsion, the mass percent of each component and each component is:
Cellulose 15-25%;
Emulsifying dispersant 0.2-0.4%;
Surplus is water.
Preferred technical scheme further, described cellulose is cellulosic carboxymethyl group substitution product.
Further preferred technical scheme, described emulsifying dispersant is the one in Dodecyl trimethyl ammonium chloride, hexadecyltrimethylammonium chloride or octadecyl trimethyl ammonium chloride.
Described substituted cellulose extracts to obtain from timber or cotton.
In described step S2, initator is the one in NaOH, potassium hydroxide or ammonium hydroxide.
In described step S3, aqueous solutions of polymers is content 40% dimethyl diallyl ammonium chloride/acrylamide copolymer.
Described 40% dimethyl diallyl ammonium chloride/acrylamide copolymer and cellulosic mass ratio are 8-15:100.
The PH adjusting agent added in described step S3 is the combination of a kind of in sheet alkali, soda ash, hydrochloric acid, sulfuric acid or glacial acetic acid or any two kinds.
Described step S4 medium viscosity stabilizing agent is succinyl oxide or five sodium, and this viscosity stabiliser and cellulosic mass ratio are 1-2:100.
Beneficial effect of the present invention is: the polymer utilizing cellulose scion grafting positive charge in emulsion, by it is added in paper pulp raw material, itself and electronegative fiber is allowed to stablize absorption, thus strengthen the internal bond strength of page, and because the effect of polymer improves fibre strength, avoid the loss of dry strength agent simultaneously, reduce the difficulty to wastewater treatment.
Meanwhile, present invention process is simple, uses flow process extremely short, not containing the harmful substance such as formaldehyde, benzene, can not produce harmful side product, not pollute the environment.
In addition, the product viscosity that the present invention obtains is stablized, and effectively can improve paper pull, be soaked in water during use dilution, directly adds in paper pulp and uses, have the features such as easy to use, turnover rate is low.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with detailed description of the invention, the present invention is described in more detail.Should be appreciated that, these describe just exemplary, and do not really want to limit the scope of the invention.In addition, in the following description, the description to known features and technology is eliminated, to avoid unnecessarily obscuring concept of the present invention.
A kind of preparation method of paper pull dry strength agent comprises the following steps:
Step S1, is mixed into cellulose emulsion by water, emulsifying dispersant and cellulose;
Wherein, in cellulose emulsion, the mass percent of each component and each component is: cellulose 15-25%; Emulsifying dispersant 0.2-0.4%; Surplus is water.Described cellulose is cellulosic carboxymethyl group substitution product, and substituted cellulose extracts from timber or cotton obtained (the present embodiment extracts obtained from timber).Described emulsifying dispersant is the one (the present embodiment selects Dodecyl trimethyl ammonium chloride) in Dodecyl trimethyl ammonium chloride, hexadecyltrimethylammonium chloride or octadecyl trimethyl ammonium chloride.
Step S2, soaks 2 hours after being stirred by cellulose emulsion, then is warming up to 45-55 degree Celsius, then to add initator regulator solution pH value be 7-8;
Wherein, initator is the one (the present embodiment selects potassium hydroxide) in NaOH, potassium hydroxide or ammonium hydroxide.
Step S3, adds aqueous solutions of polymers, reaction 3-5 hour, cooling, then to add PH adjusting agent adjustment solution pH value be 6-8;
Wherein, aqueous solutions of polymers is content 40% dimethyl diallyl ammonium chloride/acrylamide copolymer, and 40% dimethyl diallyl ammonium chloride/acrylamide copolymer and cellulosic mass ratio are 8-15:100.PH adjusting agent is the combination (the present embodiment is soda ash) of a kind of in sheet alkali, soda ash, hydrochloric acid, sulfuric acid or glacial acetic acid or any two kinds.
Step S4, adds viscosity stabiliser, stirs, and recording substitution value is 0.03-0.06, then collects solid product wherein, and this solid product is obtained paper pull dry strength agent.
Wherein, viscosity stabiliser is succinyl oxide or five sodium (the present embodiment selects succinyl oxide), and this succinyl oxide viscosity stabiliser and cellulosic mass ratio are 1-2:100.
In order to verify the effect of the paper pull dry strength agent that the present invention obtains, getting the paper pull dry strength agent that the present invention obtains and soaking the paper pull dry strength agent solution that obtained concentration is 10%, and carrying out following contrast experiment:
Experiment A, paper original slurry material mixed with this paper pull dry strength agent solution, wherein the mass ratio of paper original slurry material and paper pull dry strength agent solution of the present invention is 100:3.
Experiment B, paper original slurry material mixed with this paper pull dry strength agent solution, wherein the mass ratio of paper original slurry material and paper pull dry strength agent solution of the present invention is 100:5.
Experiment C, paper original slurry material mixed with this paper pull dry strength agent solution, wherein the mass ratio of paper original slurry material and paper pull dry strength agent solution of the present invention is 100:10.
Experiment D, only has paper original slurry material.
By paper obtained to experiment A, experiment B, experiment C and experiment D, after carrying out 40 grams of quantitative handsheets successively on the handsheet machine of the same terms, then dry on polisher, finally detect successively.Testing result is as follows:
As can be seen from the table, under identical condition, by adding the product that the present invention obtains in paper pulp, paper tensile strength (fracture length) improves significantly, first-pass retention improves greatly simultaneously, the abbreviation of COD(chemical oxygen demand COD) reduce obviously.
Should be understood that, above-mentioned detailed description of the invention of the present invention only for exemplary illustration or explain principle of the present invention, and is not construed as limiting the invention.Therefore, any amendment made when without departing from the spirit and scope of the present invention, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.In addition, claims of the present invention be intended to contain fall into claims scope and border or this scope and border equivalents in whole change and modification.
Claims (10)
1. a preparation method for paper pull dry strength agent, is characterized in that, comprises the following steps:
Step S1, is mixed into cellulose emulsion by water, emulsifying dispersant and cellulose;
Step S2, soaks 2 hours after being stirred by cellulose emulsion, then is warming up to 45-55 degree Celsius, then to add initator regulator solution pH value be 7-8;
Step S3
,add aqueous solutions of polymers, reaction 3-5 hour, cooling, then to add PH adjusting agent adjustment solution pH value be 6-8;
Step S4, adds viscosity stabiliser, stirs, and recording substitution value is 0.03-0.06, then collects solid product wherein, and this solid product is obtained paper pull dry strength agent.
2. the preparation method of a kind of paper pull dry strength agent according to claim 1, is characterized in that, in described step S1, in cellulose emulsion, the mass percent of each component and each component is:
Cellulose 15-25%;
Emulsifying dispersant 0.2-0.4%;
Surplus is water.
3. the preparation method of a kind of paper pull dry strength agent according to claim 2, is characterized in that, described cellulose is cellulosic carboxymethyl group substitution product.
4. the preparation method of a kind of paper pull dry strength agent according to claim 2, is characterized in that, described emulsifying dispersant is the one in Dodecyl trimethyl ammonium chloride, hexadecyltrimethylammonium chloride or octadecyl trimethyl ammonium chloride.
5. the preparation method of a kind of paper pull dry strength agent according to claim 3, is characterized in that: described substituted cellulose extracts to obtain from timber or cotton.
6. the preparation method of a kind of paper pull dry strength agent according to claim 1, is characterized in that: in described step S2, initator is the one in NaOH, potassium hydroxide or ammonium hydroxide.
7. the preparation method of a kind of paper pull dry strength agent according to claim 1, is characterized in that: in described step S3, aqueous solutions of polymers is content 40% dimethyl diallyl ammonium chloride/acrylamide copolymer.
8. the preparation method of a kind of paper pull dry strength agent according to claim 7, is characterized in that: described 40% dimethyl diallyl ammonium chloride/acrylamide copolymer and cellulosic mass ratio are 8-15:100.
9. the preparation method of a kind of paper pull dry strength agent according to claim 1, is characterized in that: the PH adjusting agent added in described step S3 is the combination of a kind of in sheet alkali, soda ash, hydrochloric acid, sulfuric acid or glacial acetic acid or any two kinds.
10. the preparation method of a kind of paper pull dry strength agent according to claim 1, is characterized in that: described step S4 medium viscosity stabilizing agent is succinyl oxide or five sodium, and this viscosity stabiliser and cellulosic mass ratio are 1-2:100.
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| CN201410713139.0A CN104611991B (en) | 2014-12-02 | 2014-12-02 | A kind of drying strengthening agent and its preparation method and application for enhancing paper pull |
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| CN201410713139.0A CN104611991B (en) | 2014-12-02 | 2014-12-02 | A kind of drying strengthening agent and its preparation method and application for enhancing paper pull |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1194018A (en) * | 1995-08-25 | 1998-09-23 | Cytec技术有限公司 | Methods and agents for improving paper printability and strength |
| CN101225621A (en) * | 2008-02-20 | 2008-07-23 | 福建师范大学 | Multifunctional macromolecule paper making promoter and preparation method thereof |
| EP2239370A1 (en) * | 2009-04-09 | 2010-10-13 | Kompetenzzentrum Holz GmbH | Dry and wet strength improvement of paper products with cationic tannin |
| CN103408700A (en) * | 2013-07-09 | 2013-11-27 | 上海东升新材料有限公司 | Preparation method of amphoteric dry strength agent |
-
2014
- 2014-12-02 CN CN201410713139.0A patent/CN104611991B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1194018A (en) * | 1995-08-25 | 1998-09-23 | Cytec技术有限公司 | Methods and agents for improving paper printability and strength |
| CN101225621A (en) * | 2008-02-20 | 2008-07-23 | 福建师范大学 | Multifunctional macromolecule paper making promoter and preparation method thereof |
| EP2239370A1 (en) * | 2009-04-09 | 2010-10-13 | Kompetenzzentrum Holz GmbH | Dry and wet strength improvement of paper products with cationic tannin |
| CN103408700A (en) * | 2013-07-09 | 2013-11-27 | 上海东升新材料有限公司 | Preparation method of amphoteric dry strength agent |
Non-Patent Citations (1)
| Title |
|---|
| 曹亚峰等: ""羧甲基纤维素接枝二甲基二烯丙基氯化铵-丙烯酰胺共聚物的合成"", 《大连轻工业学院学报》 * |
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