CN103806338A - Application method of papermaking wet-strength agent - Google Patents
Application method of papermaking wet-strength agent Download PDFInfo
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- CN103806338A CN103806338A CN201210445699.3A CN201210445699A CN103806338A CN 103806338 A CN103806338 A CN 103806338A CN 201210445699 A CN201210445699 A CN 201210445699A CN 103806338 A CN103806338 A CN 103806338A
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- strength agent
- wet strength
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- papermaking
- diethylenetriamine
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Abstract
The invention relates to an application method of a papermaking wet-strength agent, and belongs to the field of pulping and papermaking. The method comprises direct addition of the wet strength agent into slurry, the method is characterized in that: the adding amount of the wet strength agent accounts for 0.25-0.75% by mass of the absolutely-dry slurry. A preparation method of the wet strength agent comprises the following steps: firstly, dissolving diethylenetriamine into water for preparing a solution with the mass percentage concentration of 30%, then adding adipic acid to the solution, then adding a modifier M into the solution to generate intermediate polyamide polyamine, and continuing to add epichlorohydrin into the intermediate solution; wherein the mass ratio of adipic acid to diethylenetriamine to modifier M is 7:4:2. The modified PAE (polyamide polyamine epichlorohydrin) wet strength agent of the invention can be directly added into the slurry, by precise control of adding amount, the paper strength can be ensured, meanwhile the cost is reduced, and the method can reduce wastewater pollution, and reduce corrosion to papermaking equipment.
Description
Technical field
The invention belongs to pulping and paper-making field, be specifically related to a kind of application process of wet strength agent for papermaking.
Background technology
Cationic polyamide-epichlorohydrin resin (PAE) is wet strength agent the most frequently used in paper, and it has the features such as efficient, applied widely.PAE, except increasing the wet epistasis energy of paper, also can increase to some extent dry strength, and can be used as the retention agents of filler in paper-making process, improves the filter aid of paper output etc.But PAE price is higher, cost falls in order to save in factory, is finding the substitute of PAE always, makes paper product strength decreased, loses more than gain.Meanwhile, PAE paper-making pollution is larger, is unfavorable for the protection of environment.Though and modification PAE can be to a certain degree raising paper strength, concrete addition is not yet clear and definite.
Summary of the invention
Goal of the invention: for the deficiencies in the prior art, the object of this invention is to provide a kind of application process of wet strength agent for papermaking, accurately control addition, fallen cost in the same time that guarantees paper product intensity, and this method can alleviate contaminated wastewater, weaken the corrosion to paper making equipment.
Technical scheme: in order to realize foregoing invention object, the technical solution used in the present invention is as follows:
An application process for wet strength agent for papermaking, comprises described wet strength agent is directly added in slurry, and the mass percent that described wet strength agent addition accounts for over dry slurry is between 0.25-0.75%.
When the mass percent that described wet strength agent addition accounts for over dry slurry is 0.5%, the wet strength maximum of paper.
Described wet strength agent for papermaking collocation method, comprise the following steps: be first 30% solution by the water-soluble diethylenetriamine mass percentage concentration that is made into, then in described solution, add adipic acid, the now temperature automatic-ascending of described solution, moisture volatilizees thereupon, the temperature of described solution can reach 110-120 ℃, and then adds modifier M in described solution, under agitation continues to be heated to 140-180 ℃; In the most backward described solution, slowly add water, make described solution be cooled to 70 ℃, generate intermediate polyamide polyamine, in described midbody solution, continue to add epoxychloropropane, react about 2h, keeping pH value of reaction system is that 7.5-8.5 cessation reaction obtain wet strength agent; Wherein, the mass ratio of described adipic acid and diethylenetriamine and modifier M is 7:4:2.
The mol ratio of described polyamide polyamine and epoxychloropropane is between 1:1.4-1.8.
The wet strength agent outward appearance of telling is faint yellow thick liquid, and solid content is 12.5%, viscosity 0.03-0.1Pa.s.
In this invention, because the addition of wet strength agent is very large on the wet strength impact of paper, when the mass ratio take adipic acid and diethylenetriamine and modifier M reacts the wet strength agent making as 7:4:2 etc., through test data, in the time of wet strength agent independent role reed pulp, optimal addn is between 0.25%-0.75%, wherein, in the time that wet strength agent addition is 0.5%, the wet strength maximum of paper, is 28.04%, when the addition of industrial goods is 0.5%, the wet strength of paper is 25.70%.
In this invention, obtain PAE intermediate with adipic acid, diethylenetriamine and modifier M reaction, after being oxidized with epoxychloropropane, obtain wet strength agent; In the time changing the proportioning of adipic acid and diethylenetriamine and modifier M, viscosity to the intermediate polyamide polyamine generating is very large, this is because the viscosity of polyamide polyamine is relevant with its degree of polymerization, viscosity is large, and the degree of polymerization is large relatively, retention performance is good, so will rationally control the mass ratio of adipic acid, diethylenetriamine and modifier M in preparation process, optimum ratio is that the mass ratio of adipic acid and diethylenetriamine and modifier M is 7:4:2; On imido grpup, nitrogen easily and epoxychloropropane generation nucleophilic substitution, form cationic polyamide polymeric amine epichlorohydrin, it is as alkali slaking resin, under alkali condition, can form very soon cross-linked structure, in course of reaction, the variation of the mol ratio between polyamide polyester and epoxychloropropane is very large to the performance impact of polyamide polyamine, preferably determines that by experiment mol ratio between polyamide polyamine and epoxychloropropane is between 1:1.4-1.8.Adopting the modified product outward appearance that above method makes is faint yellow thick liquid, solid content 12.5%, viscosity 0.03-0.1Pa.s, water-soluble (1:10 dilution), without layering without precipitation, room temperature not stratified not gel half a year, pH value 4-5, room temperature is placed the half a year of gel not above.
Beneficial effect: for the deficiency of existing invention, when Modified PAE Resin Wet-strength Agent is applied in the present invention, can directly be added in slurry, accurately control addition, fall cost in the same time that guarantees paper product intensity, and this method can alleviate contaminated wastewater, weaken the corrosion to paper making equipment.
The specific embodiment
Below in conjunction with specific embodiment, further illustrate the present invention, the present invention implements under take technical solution of the present invention as prerequisite, should understand these embodiment and only be not used in and limit the scope of the invention for the present invention is described.
In order to determine best preparation scheme, pH is 7, carries out handsheet test by reed pulp, and measures the wet strength of page, in carrying out blank test, has also measured the enhancing effect of the production piece that current factory generally applies in contrast, and result of the test is in table 1 and table 2.
Blank embodiment
In the experiment of table 2 empty, distilled water is added in reed pulp, addition accounts for 0.5% of reed pulp over dry quality, carries out handsheet experiment.Acquired results is in table 2.
Embodiment 1
In 1# experiment in table 1, first, by water-soluble diethylenetriamine 30% solution that is made into, then add adipic acid, now temperature automatic-ascending, moisture volatilizees thereupon, and temperature can reach 110-120 ℃, then adds modifier M, under agitation continues to be heated to 140-180 ℃.Reaction certain hour can stop heating.Slowly add water, be cooled to 70 ℃, in above-mentioned intermediate, add epoxychloropropane, react about 2h, maintenance system pH is 7.5-8.5, in the time that viscosity reaches requirement, adds immediately salt acid for adjusting pH value cessation reaction.In 1#, the mass ratio of adipic acid and diethylenetriamine and modifier M is 7:6:2.Mol ratio between polyamide polyamine and epoxychloropropane is 1:1.4.
In 1# experiment in table 2, adopt the prepared Modified PAE Resin Wet-strength Agent of 1# in table 1, solid content is 12.5%, and the water-soluble 1:10 that is diluted to, adds PAE wet strength agent in reed pulp, and addition accounts for 0.5% of reed pulp over dry quality, carries out handsheet experiment.Acquired results is in table 2.
Embodiment 2
In 2# experiment in table 1, first, by water-soluble diethylenetriamine 30% solution that is made into, then add adipic acid, now temperature automatic-ascending, moisture volatilizees thereupon, and temperature can reach 110-120 ℃, then adds modifier M, under agitation continues to be heated to 140-180 ℃.Reaction certain hour can stop heating.Slowly add water, be cooled to 70 ℃, in above-mentioned intermediate, add epoxychloropropane, react about 2h, maintenance system pH is 7.5-8.5, in the time that viscosity reaches requirement, adds immediately salt acid for adjusting pH value cessation reaction.In 1#, the mass ratio of adipic acid and diethylenetriamine and modifier M is 7:5:2.Mol ratio between polyamide polyamine and epoxychloropropane is 1:1.4.
In 2# experiment in table 2, adopt the prepared Modified PAE Resin Wet-strength Agent of 1# in table 1, solid content is 12.5%, and the water-soluble 1:10 that is diluted to, adds PAE wet strength agent in reed pulp, and addition accounts for 0.5% of reed pulp over dry quality, carries out handsheet experiment.Acquired results is in table 2.
Embodiment 3
In 3# experiment in table 1, first, by water-soluble diethylenetriamine 30% solution that is made into, then add adipic acid, now temperature automatic-ascending, moisture volatilizees thereupon, and temperature can reach 110-120 ℃, then adds modifier M, under agitation continues to be heated to 140-180 ℃.Reaction certain hour can stop heating.Slowly add water, be cooled to 70 ℃, in above-mentioned intermediate, add epoxychloropropane, react about 2h, maintenance system pH is 7.5-8.5, in the time that viscosity reaches requirement, adds immediately salt acid for adjusting pH value cessation reaction.In 1#, the mass ratio of adipic acid and diethylenetriamine and modifier M is 7:4:2.Mol ratio between polyamide polyamine and epoxychloropropane is 1:1.4.
In 3# experiment in table 2, adopt the prepared Modified PAE Resin Wet-strength Agent of 1# in table 1, solid content is 12.5%, and the water-soluble 1:10 that is diluted to, adds PAE wet strength agent in reed pulp, and addition accounts for 0.5% of reed pulp over dry quality, carries out handsheet experiment.Acquired results is in table 2.
Embodiment 4
In 4# experiment in table 1, first, by water-soluble diethylenetriamine 30% solution that is made into, then add adipic acid, now temperature automatic-ascending, moisture volatilizees thereupon, and temperature can reach 110-120 ℃, then adds modifier M, under agitation continues to be heated to 140-180 ℃.Reaction certain hour can stop heating.Slowly add water, be cooled to 70 ℃, in above-mentioned intermediate, add epoxychloropropane, react about 2h, maintenance system pH is 7.5-8.5, in the time that viscosity reaches requirement, adds immediately salt acid for adjusting pH value cessation reaction.In 1#, the mass ratio of adipic acid and diethylenetriamine and modifier M is 7:3:2.Mol ratio between polyamide polyamine and epoxychloropropane is 1:1.4.
In 4# experiment in table 2, adopt the prepared Modified PAE Resin Wet-strength Agent of 1# in table 1, solid content is 12.5%, and the water-soluble 1:10 that is diluted to, adds PAE wet strength agent in reed pulp, and addition accounts for 0.5% of reed pulp over dry quality, carries out handsheet experiment.Acquired results is in table 2.
Embodiment 5
In industrial goods experiment in table 2, adopt industry sampling wet strength agent, solid content is 12.5%, and the water-soluble 1:10 that is diluted to, adds this wet strength agent in reed pulp, and addition accounts for 0.5% of reed pulp over dry quality, carries out handsheet experiment.Acquired results is in table 2.
As shown in Table 1, the mass ratio of adipic acid and diethylenetriamine and modifier M is preferably 7:4:2.
As shown in Table 2, under the identical condition of other conditions, 1# is very large to reed pulp wet strength influence degree difference to 4# resin, and 3# scheme is preferred plan, and in the time that addition is 0.5%, wet strength is 28.05%, higher than 25.70% of general industry product.Note: table 1 result is measurement data in 50% solution of polyamide polyamine at 25 ℃.
The impact of table 1 raw material proportioning on polyamide polyamine viscosity.
The impact of table 2 different resins on reed pulp paper wet strength.
Embodiment 6
After determining that 3# scheme is best preparation scheme, take reed pulp as slurry, 3# wet strength agent and production piece are carried out to contrast test, when wet strengthening agent is different, the wet strength result of the test of paper is in table 3.Wherein, the addition of wet strength agent refers to and the mass ratio of oven dry stock.
Can find out from following table 3, the addition of wet strength agent is very large on the wet strength impact of paper, when the mass ratio take adipic acid and diethylenetriamine and modifier M reacts the wet strength agent making as 7:4:2 etc., through test data, in the time of wet strength agent independent role reed pulp, optimal addn is between 0.25%-0.75%, wherein, in the time that wet strength agent addition is 0.5%, the wet strength maximum of paper, is 28.04%, when the addition of industrial goods is 0.5%, the wet strength of paper is 25.70%.3# modification wet strength agent action effect is better than industrial goods.
The impact of the consumption of table 3 3# wet strength agent and industrial goods on reed pulp paper wet strength
Claims (4)
1. an application process for wet strength agent for papermaking, comprises described wet strength agent is directly added in slurry, it is characterized in that: the mass percent that described wet strength agent addition accounts for over dry slurry is between 0.25-0.75%.
2. the application process of wet strength agent for papermaking according to claim 1, it is characterized in that: the preparation method of described wet strength agent comprises the following steps: be first 30% solution by the water-soluble diethylenetriamine mass percentage concentration that is made into, then in described solution, add adipic acid, the now temperature automatic-ascending of described solution, moisture volatilizees thereupon, the temperature of described solution can reach 110-120 ℃, and then adds modifier M in described solution, under agitation continues to be heated to 140-180 ℃; In the most backward described solution, slowly add water, make described solution be cooled to 70 ℃, generate intermediate polyamide polyamine, in described midbody solution, continue to add epoxychloropropane, react about 2h, keeping pH value of reaction system is that 7.5-8.5 cessation reaction obtain wet strength agent; Wherein, the mass ratio of described adipic acid and diethylenetriamine and modifier M is 7:4:2.
3. the application process of wet strength agent for papermaking according to claim 1, is characterized in that: the mol ratio of described polyamide polyamine and epoxychloropropane is between 1:1.4-1.8.
4. the application process of wet strength agent for papermaking according to claim 1, is characterized in that: the wet strength agent outward appearance of telling is faint yellow thick liquid, and solid content is 12.5%, viscosity 0.03-0.1Pa.s.
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| CN201210445699.3A CN103806338A (en) | 2012-11-09 | 2012-11-09 | Application method of papermaking wet-strength agent |
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| CN201210445699.3A CN103806338A (en) | 2012-11-09 | 2012-11-09 | Application method of papermaking wet-strength agent |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107012731A (en) * | 2017-04-17 | 2017-08-04 | 浙江恒川新材料有限公司 | A kind of preparation method of the cross-linking modified high wet strength agent of PAE papermaking of environment-friendly type |
| CN109162144A (en) * | 2018-08-15 | 2019-01-08 | 华南理工大学 | A kind of preparation method and application of paper and the wet strong synergist of paper products |
| CN113832770A (en) * | 2021-10-29 | 2021-12-24 | 杭州绿邦科技有限公司 | Preparation method of efficient wet strength agent for paper |
-
2012
- 2012-11-09 CN CN201210445699.3A patent/CN103806338A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107012731A (en) * | 2017-04-17 | 2017-08-04 | 浙江恒川新材料有限公司 | A kind of preparation method of the cross-linking modified high wet strength agent of PAE papermaking of environment-friendly type |
| CN107012731B (en) * | 2017-04-17 | 2018-10-16 | 浙江恒川新材料有限公司 | A kind of preparation method of the cross-linking modified high wet strength agent of PAE papermaking of environment-friendly type |
| CN109162144A (en) * | 2018-08-15 | 2019-01-08 | 华南理工大学 | A kind of preparation method and application of paper and the wet strong synergist of paper products |
| CN113832770A (en) * | 2021-10-29 | 2021-12-24 | 杭州绿邦科技有限公司 | Preparation method of efficient wet strength agent for paper |
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Application publication date: 20140521 |