CN113622222A - ASA sizing agent, preparation method thereof, mixed pulp and paper - Google Patents
ASA sizing agent, preparation method thereof, mixed pulp and paper Download PDFInfo
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- CN113622222A CN113622222A CN202110856418.2A CN202110856418A CN113622222A CN 113622222 A CN113622222 A CN 113622222A CN 202110856418 A CN202110856418 A CN 202110856418A CN 113622222 A CN113622222 A CN 113622222A
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- asa
- sizing agent
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- cationic starch
- emulsifier
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- 238000004513 sizing Methods 0.000 title claims abstract description 80
- 238000002360 preparation method Methods 0.000 title abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 25
- 229920002472 Starch Polymers 0.000 claims abstract description 24
- 125000002091 cationic group Chemical group 0.000 claims abstract description 23
- 239000008107 starch Substances 0.000 claims abstract description 23
- 235000019698 starch Nutrition 0.000 claims abstract description 23
- 239000002245 particle Substances 0.000 claims description 11
- 239000000945 filler Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- 230000014759 maintenance of location Effects 0.000 claims description 8
- 229920001131 Pulp (paper) Polymers 0.000 claims description 7
- 239000011268 mixed slurry Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000011859 microparticle Substances 0.000 claims description 4
- 229920002401 polyacrylamide Polymers 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 230000001804 emulsifying effect Effects 0.000 claims description 2
- 239000002002 slurry Substances 0.000 claims 1
- 238000009835 boiling Methods 0.000 abstract description 6
- 239000000123 paper Substances 0.000 description 45
- 230000000052 comparative effect Effects 0.000 description 16
- 239000011436 cob Substances 0.000 description 12
- 238000004945 emulsification Methods 0.000 description 11
- 239000000243 solution Substances 0.000 description 11
- 238000010521 absorption reaction Methods 0.000 description 10
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 239000011111 cardboard Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000007787 solid Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 230000035800 maturation Effects 0.000 description 2
- 239000011087 paperboard Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- -1 Alkenyl succinic anhydride Chemical compound 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 241000274582 Pycnanthus angolensis Species 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical group [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229960000892 attapulgite Drugs 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000003002 pH adjusting agent Substances 0.000 description 1
- 238000001139 pH measurement Methods 0.000 description 1
- 229910052625 palygorskite Inorganic materials 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229940014800 succinic anhydride Drugs 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/34—Paper
- G01N33/346—Paper sheets
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Paper (AREA)
Abstract
The invention discloses an ASA sizing agent, a preparation method thereof, mixed pulp and paper. The ASA sizing agent comprises: the ASA emulsifying agent is a water solution of solution type cationic starch, and the mass ratio of the ASA to the solution type cationic starch is (2-8): 1. The preparation process of the ASA sizing agent does not need high-temperature boiling gelatinization of an emulsifier, is simple to operate, reduces the danger, and has the advantages of small dosage, low cost and strong water resistance of finished paper.
Description
Technical Field
The invention relates to an ASA sizing agent, a preparation method thereof, mixed pulp and paper
Background
With the continuous development of society, the consumption of paper in daily life of people is increasing day by day, and some papers are required to have good liquid resistance (particularly water and aqueous solution) so as to be suitable for writing or moisture resistance and humidity resistance. In order to achieve the above requirements, sizing treatment is performed during the paper making process or on the surface of the finished paper. The sizing method mainly comprises three methods of internal sizing, surface sizing and double sizing. Wherein, the internal sizing (internal sizing) is to add sizing material into the pulp in the paper making process and then to make paper or paperboard with lyophobic property.
Alkenyl succinic anhydride, ASA for short, is one of the reactive neutral sizing agents commonly used in the paper industry. Which is itself insoluble in water and is a non-ionic or weakly anionic species. At present, ASA is mainly used for gypsum mask paper, boxboard paper, liquid-bag paper and the like. The ASA serving as the internal sizing agent for the paper making pulp has higher reaction activity and retention rate, high curing speed and irreversible performance, and the dosage of the ASA is less than that of other internal sizing agents under the condition of achieving the same sizing degree. When the ASA is used as a sizing agent, an emulsifier is required to be added to enhance the ductility of the ASA, so that the waterproof effect is achieved. The conventional emulsifier is cationic starch, which needs to be decocted for gelatinization before use, so that the labor cost and the high-temperature steam cost of decocting the gelatin are increased, and the complexity and the danger of operation are increased in a high-temperature environment. Meanwhile, the water absorption of the sized paper needs to be further reduced, and although the dosage of ASA is smaller than that of other sizing agents in the pulp, the dosage of ASA has a further reduced space, so that the cost is reduced.
Therefore, there is a strong need for those skilled in the art to develop an ASA sizing agent that is easy to operate, cost effective, and further reduces the amount used.
Disclosure of Invention
The invention aims to solve the technical problems that the sizing agent in the prior art needs high-temperature boiling and pasting in the preparation process, so that the operation is complex and the danger is high, and the paper after sizing has high water absorption, large dosage of the sizing agent and high cost, and provides an ASA sizing agent, a preparation method thereof, mixed pulp and paper. The preparation process of the ASA sizing agent does not need high-temperature boiling gelatinization of an emulsifier, is simple to operate, reduces the danger, and has the advantages of small dosage, low cost and strong water resistance of finished paper.
The invention adopts the following technical scheme to solve the technical problems:
the invention provides an ASA sizing agent, which comprises: the ASA emulsifying agent is a water solution of solution type cationic starch, and the mass ratio of the ASA to the solution type cationic starch is (2-8): 1.
In the present invention, the pH of the emulsifier can be conventional in the art, preferably 2 to 6, more preferably 3 to 5, such as 4.
In the present invention, the preparation method of the emulsifier may be conventional in the art, and generally, the solution type cationic starch is dissolved in water and adjusted to the pH value with a pH adjuster.
Wherein, the pH regulator can be conventional in the field, and preferably is aluminum sulfate and/or citric acid.
In the present invention, the concentration of the emulsifier can be conventional in the art, and is generally 2 to 20%, preferably 3 to 10%, for example 4%, wherein the percentages are mass percentages.
The solution type cationic starch can be water-soluble cationic starch conventional in the art, and is preferably solution type cationic starch with model SCS16V1, which is produced by Shanghai Dongsheng New Material Co.
In the present invention, the mass ratio of the solution type cationic starch to the ASA is preferably (3-6): 1, for example, 3.5:1 or 5.5: 1.
The invention discloses a method for preparing an ASA sizing agent, which comprises the steps of using solution type cationic starch as a reinforcing agent and a retention aid in the papermaking industry, creatively using the solution type cationic starch as an emulsifier in the ASA sizing agent, not only omitting the conventional boiling and pasting process of the cationic starch, but also enabling the prepared ASA sizing agent to have smaller particle size and better water resistance of finished paper, saving the using amount of the ASA sizing agent and reducing the sizing cost.
In the present invention, the particle size of the ASA sizing agent may be as conventional in the art, preferably D90 ≦ 2.0 μm, more preferably D90 ≦ 1.8 μm.
The invention also provides a preparation method of the ASA sizing agent, which comprises the following steps: and mixing and emulsifying the emulsifier and the ASA to obtain the ASA modified ASA.
In the present invention, preferably, the emulsifier is preheated and then mixed with the ASA for emulsification.
Wherein, the temperature of the preheated emulsifier can be conventional in the field, preferably 30-50 ℃, and more preferably 40 ℃.
In the present invention, the emulsification operation is generally carried out in an emulsification apparatus. The emulsification apparatus may be conventional in the art, preferably an emulsification pump.
The invention also provides a mixed size which comprises the ASA sizing agent.
In the invention, the mixed slurry also comprises 60-100% of paper pulp and 0-40% of papermaking filler, wherein the ASA sizing agent accounts for 4-14% of the total mass of the paper pulp and the papermaking filler, and the percentages are mass percentages.
Wherein, the paper pulp can be conventional in the field, and can be one or more of wood pulp, straw pulp, hemp pulp, reed pulp, cane pulp, bamboo pulp and rag pulp, and wood pulp is preferred.
Wherein the papermaking filler may be conventional in the art and may generally be one or more of talc, china clay, calcium carbonate, titanium dioxide, calcined china clay, zeolite rock dust and attapulgite zircon.
In the present invention, preferably, the mixed slurry further includes a retention aid and a drainage aid.
Wherein the retention aid may be conventional in the art, and may typically be a polyacrylamide.
Wherein the retention aid may be added in an amount conventional in the art, preferably 100 to 500ppm, such as 200ppm or 300ppm, wherein ppm is based on the total mass of the pulp and the papermaking filler.
The filter aid can be conventional in the field, and can be silica gel microparticles generally.
Wherein the filter aid may be added in an amount conventional in the art, preferably from 50 to 300ppm, such as 100ppm or 150ppm, wherein ppm is based on the total mass of the pulp and the papermaking filler.
The invention also provides paper made of the mixed pulp.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The reagents and starting materials used in the present invention are commercially available.
The positive progress effects of the invention are as follows:
1. the paper made by the ASA sizing agent has stronger water absorption resistance of 70g/m2When the addition amount of the double-sided offset paper is 1.0Kg/t, the Cobb value of the front side can be averagely reduced to 23.5g/m2Even as low as 21.6g/m2(ii) a The Cobb value of the reverse side can be averagedReduced to 23.0g/m2Even as low as 21.0g/m2Compared with the prior sizing agent, the sizing agent can reduce by 15.3 percent.
2. When the water absorption value is equivalent to that of the prior art, the addition amount of the ASA sizing agent can be reduced by 20 percent;
3. the preparation method of the ASA sizing agent is simple, boiling and pasting are not needed, the labor cost of glue boiling and the cost of high-temperature steam can be saved, and the operation risk is reduced;
4. the ASA sizing agent has wide application range and can be used in the production process of cultural paper, white cardboard, kraft liner, cardboard paper and other paper types.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention. The experimental methods without specifying specific conditions in the following examples were selected according to the conventional methods and conditions, or according to the commercial instructions.
The solution type cationic starch of the embodiments 1 to 3 is produced by Shanghai Dongshi New Material Co., Ltd, and has the model of SCS16V 1;
the cationic starch of comparative example 1 was a type XW104, manufactured by Shandong Xilai starch Co., Ltd;
ASA is produced by camira chemical (shanghai) limited;
other raw materials are commercially available.
Example 1
S1: preparation of the emulsifier
Diluting the solution type cationic starch with warm water to 4%, adjusting pH to about 4.0 with citric acid, and heating to 40 deg.C to obtain emulsifier.
S2: preparation of sizing agent
And adding the emulsifier of S1 and ASA into an emulsification pump according to the volume ratio of 70:1 for emulsification to obtain the ASA sizing agent.
Example 2
S1 is the same as in example 1.
S2: preparation of sizing agent
And adding the emulsifier of S1 and the ASA stock solution into an emulsification pump according to the volume ratio of 100:1 for emulsification to obtain the ASA sizing agent.
Comparative example 1
Diluting the cationic starch to be emulsion with the concentration of 4% by using clear water under the stirring state, uniformly stirring, heating to 95 ℃, and preserving the heat at 95 ℃ for 15min to fully gelatinize the cationic starch. Cooling to room temperature after gelatinization, adjusting pH to about 4.0 with citric acid, and heating to 40 deg.C to obtain emulsifier.
And adding the obtained emulsifier and ASA into an emulsification pump according to the volume ratio of 100:1 for emulsification to obtain the ASA sizing agent.
Effect example 1
1. Particle size, solid content, viscosity and pH measurements
The ASA sizing agents of examples 1-2 and comparative example 1 were tested for particle size, solids content, viscosity and pH as follows:
particle size was measured using a Sichuan JL-1155 laser particle size distribution measuring apparatus, and the results are shown in Table 1;
the solid content was measured by a Mettler Toledo moisture meter, and the results are shown in Table 1;
the viscosity was measured using a Brookf IELDDV-II rotational viscometer, Bohler fly, with results shown in Table 1;
the pH was measured using a Metler FF model 28 acidimeter.
Effect example 2
1. Making paper by using paper
A paper machine system: the paper machine type is fourdrinier paper machine, the production speed is about 1200m/min, the papermaking width is 4960mm, and the production paper type is 70g/m2Double-sided offset paper.
Taking the ASA sizing agents obtained in the example 1 and the comparative example 1 as sizing agents in the sizing agent, the sizing amount is shown in the table 2, preparing mixed sizing agent, wherein the mixed sizing agent also comprises 200ppm of polyacrylamide and 100ppm of silica gel microparticles, and obtaining 70g/m through the steps of wire netting, papermaking and forming2Double-sided offset paper. Wherein, the sizing amount refers to the addition amount of the ASA sizing agent per ton of pulp and papermaking filler.
2. Water resistance test of finished paper
The water resistance of the finished paper is tested according to the standard GB/T1540-2003, and the specific method is as follows:
taking 5 paper patterns of the front and the back with a matched sampler; a weighed mass of the pattern is placed on the annular surface of the cylinder with the test surface facing upward, and the annular surface of the cylinder is tightly contacted with the pattern. Measuring 100mL of water by using a measuring cylinder, pouring the water into the cylinder, simultaneously starting a stopwatch for timing, pouring the water 10s-15s before the water absorption is finished, taking out a sample, enabling the water absorption surface of the sample to be upwards and stably placed on pre-paved water absorption paper, and immediately performing back-and-forth rolling once within 4s by using a metal press roller without applying other pressure to suck the residual water on the surface of the paper sample. The sample was quickly placed on a balance, and the mass after water absorption was weighed to determine the water absorption (cobb) value. The average water absorption (cobb) values of 2 to 5 sheets of paper samples measured in the same manner were calculated, and the results are shown in Table 2.
Effect example 3
1. Making paper by using paper
A paper machine system: the paper machine type is 3200m long-wire paper machine, the production speed is about 500m/min, and the production paper type is 330g/m2High bulk ivory board.
Taking the ASA sizing agents obtained in the example 2 and the comparative example 1 as sizing agents in the sizing agent, wherein the sizing amount is shown in the table 3, preparing mixed sizing agent, wherein the mixed sizing agent also comprises 200ppm of polyacrylamide and 100ppm of silica gel microparticles, and obtaining the white cardboard through the steps of wire netting, papermaking and forming. Wherein the sizing amount refers to the amount of ASA sizing agent added per ton of papermaking fiber.
2. Water resistance test of finished paper
The water resistance of the white cardboard was measured in the same manner as in effect example 2, and the results are shown in table 3.
TABLE 1 physical Properties test results for ASA sizing agents
Table 2 water resistance test results of the sized double coated papers
Table 3 water resistance test result table of white cardboard after sizing
As can be seen from Table 1, the solid content, pH value and viscosity value of the ASA sizing agent obtained in the examples 1-2 are basically equivalent to those of the comparative example 1; the particle size is significantly reduced compared to comparative example 1. The proportion of the particles within 1 μm and 2 μm is higher than that of the comparative example 1; the particle sizes of D50 and D90 were less than 0.85 μm and 1.8 μm, respectively, and were also less than comparative example 1, especially example 1. The smaller average particle size provides the example with the ASA size having a higher specific surface area and better ductility, which results in better water resistance of the sized paper.
As is apparent from Table 2, when the amount of the ASA sizing agent added in example 1 was 1.0Kg/t, the average Cobb values after the front and back sides were 23.5g/m, respectively2And 23.0g/m2When the amount of addition of the ASA sizing agent of example 1 was 0.8Kg/t, the average Cobb values after front and back aging were 23.8g/m, respectively, which were reduced by 14.5 and 12.9%, respectively, compared with comparative example 12And 24.0g/m2Also, the average Cobb value was significantly lower than that of comparative example 1 when the amount was 1.0Kg/t, indicating that the amount of addition of the ASA sizing agent of example 1 could be reduced to 0.8Kg/t, which is more than 20% less than that of comparative example 1.
From Table 3 canIt was found that when the ASA sizing agent of example 2 was added at 1.5Kg/t, the average Cobb values after front and back curing were 79.8g/m, respectively2And 79.6g/m2Compared with comparative example 1, the reduction is respectively 12.4 percent and 11.9 percent; when the amount of the ASA sizing agent in example 2 added was 1.3Kg/t, the average Cobb values after surface maturation were 83.1g/m2And 82.7g/m2Also significantly lower than the average Cobb value at 1.5Kg/t added in comparative example 1; when the amount of the ASA sizing agent in example 2 added was 1.2Kg/t, the average Cobb values after surface maturation were 88.9g/m2And 89.7g/m2The average Cobb value satisfying the requirements and being smaller than that when the addition amount of the comparative example 1 is 1.5Kg/t shows that the addition amount of the ASA sizing agent of the example 2 on the white cardboard can be reduced to 1.2Kg/t, which is more than 20% less than that of the comparative example 1.
Claims (10)
1. An ASA sizing agent comprising: the ASA emulsifying agent is a water solution of solution type cationic starch, and the mass ratio of the ASA to the solution type cationic starch is (2-8): 1.
2. An ASA size according to claim 1 wherein the emulsifier has a pH of 2 to 6, preferably 3 to 5, such as 4;
and/or the concentration of the emulsifier is 2-20%, preferably 3-10%, for example 4%, wherein the percentages are mass percentages;
and/or the solution type cationic starch is the solution type cationic starch produced by Shanghai Dongyi New Material Co., Ltd and has the model number SCS16V 1.
3. An ASA size according to claim 1 wherein the mass ratio of the solution cationic starch to the ASA is (3-6: 1, such as 3.5:1 or 5.5: 1;
and/or the particle size D90 of the ASA sizing agent is less than or equal to 2.0 mu m, preferably D90 is less than or equal to 1.8 mu m.
4. A method for preparing an ASA sizing agent as set forth in any one of claims 1 to 3, comprising the steps of: and mixing and emulsifying the emulsifier and the ASA to obtain the ASA modified ASA.
5. The method of preparing an ASA size according to claim 4, wherein the emulsifying agent is preheated before being mixed and emulsified with the ASA.
6. The method of preparing an ASA sizing agent according to claim 5, wherein the temperature of the preheated emulsifier is 30 to 50 ℃, preferably 40 ℃.
7. A mixed size comprising the ASA sizing agent according to any one of claims 1 to 3.
8. The mixed slurry according to claim 7, further comprising 60 to 100% of paper pulp and 0 to 40% of papermaking filler, wherein the ASA sizing agent accounts for 4 to 14% of the total mass of the paper pulp and the papermaking filler, and the percentages are mass percentages;
and/or, the mixed slurry further comprises a retention aid and a drainage aid.
9. The mixing slurry according to claim 8, wherein the retention aid is polyacrylamide;
and/or the retention aid is added in an amount of 100 to 500ppm, such as 200ppm or 300ppm, wherein ppm is based on the total mass of the pulp and the papermaking filler;
and/or the filter aid is silica gel microparticles;
and/or the filter aid is added in an amount of 50 to 300ppm, such as 100ppm or 150ppm, wherein ppm is based on the total mass of the pulp and the papermaking filler.
10. A paper made using the mixed slurry of any one of claims 7 to 9.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6159339A (en) * | 1996-03-21 | 2000-12-12 | Betzdearborn Inc. | Paper size and paper sizing process |
| CN101759880A (en) * | 2010-01-13 | 2010-06-30 | 广东省造纸研究所 | Method for preparing amphiprotic starch solution for papermaking |
| CN106220746A (en) * | 2016-08-29 | 2016-12-14 | 上海东升新材料有限公司 | A kind of preparation method and applications of solution-type cationic starch |
| CN109487626A (en) * | 2018-12-25 | 2019-03-19 | 浙江恒达新材料股份有限公司 | A kind of high waterproof suction pipe lining paper and preparation method thereof |
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2021
- 2021-07-28 CN CN202110856418.2A patent/CN113622222A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6159339A (en) * | 1996-03-21 | 2000-12-12 | Betzdearborn Inc. | Paper size and paper sizing process |
| CN101759880A (en) * | 2010-01-13 | 2010-06-30 | 广东省造纸研究所 | Method for preparing amphiprotic starch solution for papermaking |
| CN106220746A (en) * | 2016-08-29 | 2016-12-14 | 上海东升新材料有限公司 | A kind of preparation method and applications of solution-type cationic starch |
| CN109487626A (en) * | 2018-12-25 | 2019-03-19 | 浙江恒达新材料股份有限公司 | A kind of high waterproof suction pipe lining paper and preparation method thereof |
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Application publication date: 20211109 |