CN105421145A - Preparation method for AKD (Alkyl Ketene Dimer) emulsion and water-resistant treatment method for paper sheets - Google Patents
Preparation method for AKD (Alkyl Ketene Dimer) emulsion and water-resistant treatment method for paper sheets Download PDFInfo
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- CN105421145A CN105421145A CN201510732560.0A CN201510732560A CN105421145A CN 105421145 A CN105421145 A CN 105421145A CN 201510732560 A CN201510732560 A CN 201510732560A CN 105421145 A CN105421145 A CN 105421145A
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/16—Sizing or water-repelling agents
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B31/00—Preparation of derivatives of starch
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Abstract
The invention discloses a preparation method for an AKD (Alkyl Ketene Dimer) emulsion and a water-resistant treatment method for paper sheets. The preparation method comprises the following steps of firstly, gelatinizing cationic starch, melting AKD wax powder at the temperature of 70 DEG C, then, pouring the gelatinized starch into the melted AKD wax powder, adding a stabilizer into the melted AKD wax powder, turning on an emulsifying machine to carry out emulsification, carrying out homogenization treatment on the solution, and carrying out rapid cooling, thereby obtaining the AKD emulsion. According to the preparation method for the AKD emulsion, disclosed by the invention, on the premise of guaranteeing the water resistance of the AKD emulsion, no starch etherifying process is carried out, and the gelatinized starch is directly used for emulsifying AKD after the starch is gelatinized, so that the equipment and labor investment of AKD emulsion manufacturers can be reduced, the aging efficiency of the AKD emulsion is high, the degree of hydrolysis of the AKD is greatly lowered, the water resisting effect is effectively guaranteed, and the economic benefit is obvious.
Description
Technical field
The invention belongs to papermaking chemical product field, specifically, relate to a kind of preparation method and paper water resistant processing method of AKD emulsion.
Background technology
In paper industry, a lot of paper kind all requires to have certain water repelling property, and plasm-glue-blending, top sizing can give paper WATER RESISTANCE.What the present invention relates to is AKD emulsion for top sizing.The preparation technology of conventional AKD emulsion first carries out cationization to common starch, then cationic starch and the AKD after melting is mixed, and adds stabilizing agent, obtains AKD emulsion after stirring, homogeneous.The shortcomings such as this technique is relatively loaded down with trivial details, needs to carry out etherification reaction to starch, and production efficiency is low, and lower machine slaking rate is low.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of preparation method of AKD emulsion is provided, the method is without the need to carrying out etherification reaction, can direct emulsification AKD, simplify operation, improve the production efficiency of AKD emulsion, and machine slaking rate under AKD can be improved, to adapt to the Production requirement of AKD emulsion enterprise.
To achieve these goals, the present invention is by the following technical solutions:
A kind of preparation method of AKD emulsion, comprise the steps: first gelatinization cationic starch, AKD wax powder is melted at 70 DEG C, then starch gelatinization liquid is poured in the AKD wax powder melted, add stabilizing agent, open mulser and carry out emulsification, by the process of above-mentioned solution homogeneous, just obtain AKD emulsion after cooling fast.The fusing point of above-mentioned AKD wax is 48-50 DEG C.
In the preparation method of above-mentioned AKD emulsion, cationic starch is made into suspension for adding water by described gelatinization cationic starch, and cationic starch weight is the 25-30% of AKD wax grain weight amount, water weight is 5.5-7.5 times of AKD wax grain weight amount, be warming up to 95 DEG C, insulation 20min, stand-by.
In the preparation method of above-mentioned AKD emulsion, stabilizing agent weight is the 4-8% of AKD wax grain weight amount.Described stabilizing agent be preferably zirconium oxychloride, polymine, carboxymethyl starch one or more; The present invention's the best is zirconium oxychloride.
In the preparation method of above-mentioned AKD emulsion, mulser rotating speed is 2500-3500rpm, 10min; Homogenizer homogenization pressure is 35-45MPa, homogeneous twice.
In the preparation method of above-mentioned AKD emulsion, AKD emulsion solid content is 14-16%.
Utilize above-mentioned AKD emulsion to the processing method of paper water resistant, comprise the following steps:
(1) oxidized starch is made into the oxidized starch dextrin that concentration is 10%, is warming up to 95 DEG C, insulation 20min, is cooled to rapidly 70 DEG C; Oxidized starch dextrin is as the carrier of AKD emulsion applying glue.
(2) add aluminum sulfate, AKD emulsion, stir, obtain AKD surface size, adjust ph is 3-4;
(3) select handmade paper, coating instrument carries out applying glue.
Compared with prior art, the present invention has following beneficial effect: AKD emulsion preparation method of the present invention is under the prerequisite ensureing AKD emulsion water repelling property, there is no starch etherification procedure, emulsification AKD is directly used for after gelatinization, can simplify the input of AKD emulsion manufacturer's equipment and manpower, and the slaking efficiency of this AKD emulsion is high, greatly reduces the hydrolysis degree of AKD, effective guarantee water resistant effect, economic benefit is obvious.
Detailed description of the invention
By the following examples the present invention is further elaborated.
embodiment 1:
Weigh 14g cationic starch, add 362ml water to it, be warming up to 95 DEG C, insulation 20min;
50gAKD wax powder is melted at 70 DEG C, adds above-mentioned cationic starch dextrin, and add 0.3g
Stabilizing agent zirconium oxychloride;
Open mulser, rotating speed 3000rpm, 10min;
Rapidly twice homogeneous is carried out, 40MPa to AKD emulsion after emulsification, be quickly cooled to room temperature, just obtain finished product
AKD emulsion, concentration is 15%;
Weigh 50g regular oxidation starch, add 450g water to it, be warming up to 95 degree, insulation 20min, is quickly cooled to 60-70 DEG C by gelatinized corn starch;
Add as 30ml aluminum sulfate (concentration 10%) and 20mlAKD emulsion to regular oxidation starch gelatinization liquid, stir;
Use Britain K303 to be coated with instrument and applying glue is carried out to handmade paper, 0# rod, 25m/min;
After applying glue, oven for drying put into by paper, 105 DEG C, 2min;
Finally cobb value and time of penetration detection are carried out to paper.
embodiment 2:
Weigh 14g cationic starch, add 362ml water to it, be warming up to 95 DEG C, insulation 20min;
50gAKD wax powder is melted at 70 DEG C, adds above-mentioned cationic starch dextrin, and add 0.3g
Stabilizing agent polymine;
Open mulser, rotating speed 3000rpm, 10min;
Rapidly twice homogeneous is carried out, 40MPa to AKD emulsion after emulsification, be quickly cooled to room temperature, just obtain finished product
AKD emulsion, concentration is 15%;
Weigh 50g regular oxidation starch, add 450g water to it, be warming up to 95 degree, insulation 20min, is quickly cooled to 60-70 DEG C by gelatinized corn starch;
Add as 30ml aluminum sulfate (concentration 10%) and 20mlAKD emulsion to regular oxidation starch gelatinization liquid, stir;
Use Britain K303 to be coated with instrument and applying glue is carried out to handmade paper, 0# rod, 25m/min;
After applying glue, oven for drying put into by paper, 105 DEG C, 2min;
Finally cobb value and time of penetration detection are carried out to paper.
comparative example 1:
The operating process of this comparative example 1 is identical with above-described embodiment 1, and difference is: select commercially available AKD emulsion (Dong Ze) as sizing agent.
Weigh 50g regular oxidation starch, add 450g water to it, be warming up to 95 degree, insulation 20min, is quickly cooled to 60-70 DEG C by gelatinized corn starch;
Add as 30ml aluminum sulfate (concentration 10%) and 20mlAKD emulsion to regular oxidation starch gelatinization liquid, stir;
Use Britain K303 to be coated with instrument and applying glue is carried out to handmade paper, 0# rod, 25m/min;
After applying glue, oven for drying put into by paper, 105 DEG C, 2min;
Finally cobb value and time of penetration detection are carried out to paper.
The AKD emulsion of use embodiment 1, embodiment 2 is carried out applying glue to handmade paper and tests the WATER RESISTANCE of handmade paper, and test result is as shown in table 1.
Table 1
| Sample | Cobb60 value/g/m2 | Osmosis/s |
| Embodiment 1 | 24 | 37 |
| Embodiment 2 | 25 | 38 |
| Comparative example 1(commercial samples) | 28 | 34 |
As can be seen from Table 1, use Cypres prepared by the present invention, water resistant effect is better than commercial samples.
The AKD emulsion prepared by the present invention, under the prerequisite that ensure that water resistant effect, can be simplified the production procedure of AKD emulsion manufacturer, enhance productivity, effectively reduce production cost.
Claims (8)
1. the preparation method of an AKD emulsion, it is characterized in that comprising the steps: first gelatinization cationic starch, AKD wax powder is melted at 70 DEG C, then starch gelatinization liquid is poured in the AKD wax powder melted, add stabilizing agent, open mulser and carry out emulsification, by the process of above-mentioned solution homogeneous, just obtain AKD emulsion after cooling fast.
2. the preparation method of AKD emulsion according to claim 1, it is characterized in that, cationic starch is made into suspension for adding water by described gelatinization cationic starch, cationic starch weight is the 25-30% of AKD wax grain weight amount, water weight is 5.5-7.5 times of AKD wax grain weight amount, be warming up to 95 DEG C, insulation 20min, stand-by.
3. the preparation method of AKD emulsion according to claim 1, is characterized in that, stabilizing agent weight is the 4-8% of AKD wax grain weight amount.
4. the preparation method of AKD emulsion according to claim 1, is characterized in that, mulser rotating speed is 2500-3500rpm, 10min; Homogenizer homogenization pressure is 35-45MPa, homogeneous twice.
5. the preparation method of AKD emulsion according to claim 1, is characterized in that, AKD emulsion solid content is 14-16%.
6. the preparation method of AKD emulsion according to claim 1, is characterized in that, described stabilizing agent is one or more mixing of zirconium oxychloride, polymine, carboxymethyl starch.
7. the preparation method of AKD emulsion according to claim 6, is characterized in that, described stabilizing agent is zirconium oxychloride.
8. utilize AKD emulsion described in claim 1 to the processing method of paper water resistant, it is characterized in that comprising the following steps:
(1) oxidized starch is made into the oxidized starch dextrin that concentration is 10%, is warming up to 95 DEG C, insulation 20min, is cooled to rapidly 70 DEG C;
(2) add aluminum sulfate, AKD emulsion, stir, obtain AKD surface size, adjust ph is 3-4;
(3) select handmade paper, coating instrument carries out applying glue.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106351067A (en) * | 2016-09-20 | 2017-01-25 | 广东志造生物科技有限公司 | Paper surface sizing agent and sizing method thereof |
| CN106758517A (en) * | 2017-01-19 | 2017-05-31 | 中山联合鸿兴造纸有限公司 | A kind of page surface glue-applying technique method |
| CN108385446A (en) * | 2018-04-04 | 2018-08-10 | 黄智慧 | A kind of preparation method of high-temperature stable release paper |
| CN109298096A (en) * | 2018-11-06 | 2019-02-01 | 华南理工大学 | A kind of automation headspace gas chromatography measuring method of AKD wax disk(-sc) fusing point |
| CN110878490A (en) * | 2019-11-22 | 2020-03-13 | 岳阳林纸股份有限公司 | Preparation method of high-melting-point AKD type surface sizing agent |
| CN111118951A (en) * | 2019-12-25 | 2020-05-08 | 上海东升新材料有限公司 | Starch emulsifier, preparation method and anionic AKD surface sizing agent prepared by emulsifier |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106351067A (en) * | 2016-09-20 | 2017-01-25 | 广东志造生物科技有限公司 | Paper surface sizing agent and sizing method thereof |
| CN106758517A (en) * | 2017-01-19 | 2017-05-31 | 中山联合鸿兴造纸有限公司 | A kind of page surface glue-applying technique method |
| CN108385446A (en) * | 2018-04-04 | 2018-08-10 | 黄智慧 | A kind of preparation method of high-temperature stable release paper |
| CN109298096A (en) * | 2018-11-06 | 2019-02-01 | 华南理工大学 | A kind of automation headspace gas chromatography measuring method of AKD wax disk(-sc) fusing point |
| CN110878490A (en) * | 2019-11-22 | 2020-03-13 | 岳阳林纸股份有限公司 | Preparation method of high-melting-point AKD type surface sizing agent |
| CN111118951A (en) * | 2019-12-25 | 2020-05-08 | 上海东升新材料有限公司 | Starch emulsifier, preparation method and anionic AKD surface sizing agent prepared by emulsifier |
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