CN104562845A - Paper surface sizing agent and method for raising paper permeability resistance - Google Patents
Paper surface sizing agent and method for raising paper permeability resistance Download PDFInfo
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Abstract
A surface sizing agent is used for sizing of paper surface. The surface sizing agent is prepared from at least one of a natural polymer surface sizing agent and a synthetic polymer surface sizing agent and at least a substance composed of a boron-containing compound. The natural polymer surface sizing agent contains at least one components selected from animal glue, starch and paraffin gel. The synthetic polymer surface sizing agent contains at least one component selected from methylcellulose, carboxymethylcellulose, polyving akohol and polyacrylamide polyurethane. The boron-containing compound contains at least one component selected from boric acid, borate and boron oxide. The addition amount of the boron-containing compound is 0.1-10% of dry mass of the surface sizing agent. The invention also provides a method for raising paper permeability resistance by applying the above surface sizing agent on the paper surface.
Description
Technical field
The present invention relates to field of papermaking, particularly a kind of surface size for paper, and adopt this paper surface sizing solution to carry out top sizing to promote the method for paper air permeance resistance to paper.
Background technology
The air permeance resistance of paper refers under unit pressure, and 100ml gas is by the time needed for paper samples of unit are, and unit is s/100ml.Air permeance resistance, as one of many paper kind important physical properties indexs, reflects the number in space in paper structure.Reduce the space in paper structure, the air permeance resistance of paper can be promoted.Paper is in coating process, moisture in coating and adhesive (latex and coating starch etc.) can spread instantaneously and penetrate in the space of paper, the amount of adhesive in coating is reduced, causes the strength of coating of coated paper to reduce, bring dry linting to fall the paper defects such as block, coated paper explosion aggravation.Therefore need the space of paper to reduce, namely promote the air permeance resistance of paper, solve the problem caused because air permeance resistance is too low in above-mentioned coating process.
The method of conventional lifting paper air permeance resistance has following two kinds usually.Namely the first improve the beating degree of slurry.Improve beating degree, make the fibrillating of slurry and wire-dividing broom purification more abundant, therefore can increase the adhesion of fiber in paper, reduce paper voidage, thus promote air permeance resistance.But this method also has defect clearly, be need to improve beating energy consumption owing to improving beating degree on the one hand; On the other hand, the optical indexes such as the bulk of paper, every intensity index and opacity change along with the raising of beating degree, larger to the qualitative effects of paper.
Namely the second improves the proportioning of softwood pulp in slurry.With regard to needle slurry and broad-leaved are starched, hardwood pulp becomes paper loose porous, and gas permeability is better, and also namely air permeance resistance is lower, and softwood pulp becomes paper tightness its natural porosity comparatively large relatively low, and gas permeability is poor, and also namely air permeance resistance is higher.Equal pulp quality, when different wet end furnish, improves the proportioning of softwood pulp, can improve the air permeance resistance of paper.But this method also has defect clearly, namely softwood pulp price is higher than hardwood pulp, improves softwood pulp proportioning and greatly will improve production cost.
Summary of the invention
The present invention aims to provide a kind of paper surface sizing solution, and utilizes this paper surface sizing solution to carry out top sizing to promote the method for the air permeance resistance of paper to paper.
A kind of surface size, for carrying out applying glue to paper surface, this surface size is by natural polymer Cypres, the material that at least one in synthesis high molecular form surface sizing agent and at least one boron-containing compound form is formulated, described natural polymer Cypres comprises animal glue, starch, at least one in wax size, described synthesis high molecular form surface sizing agent comprises methylcellulose, carboxymethyl cellulose, polyvinyl alcohol, at least one in polyacrylamide polyurethane, described boron-containing compound comprises boric acid, borate, at least one in boron oxide, the addition of described boron-containing compound is the 0.1%-10% of Cypres absolute dry mass.
Promote a method for paper air permeance resistance, comprising:
There is provided by the formulated surface size of at least one in natural polymer Cypres, synthesis high molecular form surface sizing agent, wherein, described natural polymer Cypres comprises at least one in animal glue, starch, wax size, and described synthesis high molecular form surface sizing agent comprises at least one in methylcellulose, carboxymethyl cellulose, polyvinyl alcohol, polyacrylamide polyurethane;
In surface size, add boron-containing compound, mix, wherein, described boron-containing compound comprises at least one in boric acid, borate, boron oxide, and the addition of described boron-containing compound is the 0.1%-10% of Cypres absolute dry mass; And
The surface size of gained in above-mentioned steps is utilized to carry out applying glue to paper surface.
The surface size of the present invention to routine processes, the surface size configured after adding at least one boron-containing compound wherein carries out applying glue to paper again, except simple process, owing to being add boron-containing compound in the surface size prepared, boron-containing compound is made to be able to fully to contact with Cypres such as starch wherein, mix, contribute to the hydrolysis of boron-containing compound, thus with the hydroxy combining in sizing agent, form complex compound, effectively to promote paper air permeance resistance.Further, adopt the mode of adding boron-containing compound after in using, according to needs of production, the consumption of boron-containing compound can also be regulated, thus meet actual production requirement.
Detailed description of the invention
Top sizing refer to through plasm-glue-blending or without plasm-glue-blending Paper or cardboard on the surface, coating expansion thin layer sizing material, obtain lyophobic performance.Sizing agent for top sizing mainly contains natural polymer Cypres (such as animal glue, starch, wax size etc.) and synthesis high molecular form surface sizing agent (such as methylcellulose, carboxymethyl cellulose, polyvinyl alcohol, polyacrylamide polyurethane etc.).
Conventional surface sizing method has tub-sizing, the applying glue of roller method, press polish applying glue, drying cylinder applying glue etc.No matter adopting which kind of method, is all Cypres is configured to the surface that surface size is coated on paper by surface size again.The physical strength of paper, scuff resistance, endurance quality, handling property and paper smoothness can be improved by top sizing, the defects such as paper fluffing, dry linting can also be overcome.
Surface size provided by the invention is processed by the surface size of routine, adds according to a certain percentage after at least one boron-containing compound to surface size, then carries out top sizing to the two sides of paper or one side, thus promotes the air permeance resistance of paper.The boron-containing compound be applied in the present invention comprises: the borate, boron oxide etc. such as boric acid, sodium borate decahydrate (abbreviation borax), Firebrake ZB, potassium borate.Boron-containing compound addition is the 0.1%-10% of Cypres absolute dry mass.In use, any one of above-mentioned additive can be added, also can add the mixture of above-mentioned several additives.So-called conventional surface size, refers to by natural polymer Cypres or synthesis high molecular form surface sizing agent, or both surface sizes be mixed.
In other words, the material that is made up of at least one in natural polymer Cypres, synthesis high molecular form surface sizing agent and at least one boron-containing compound of surface size provided by the invention is formulated.Wherein, natural polymer Cypres comprises animal glue, starch, wax size etc.Starch can be ative starch, also can be the modified starch such as enzymatic starch or oxidized starch.Synthesis high molecular form surface sizing agent comprises the cellulose derivative such as methylcellulose, carboxymethyl cellulose, polyvinyl alcohol, polyacrylamide polyurethane etc.Boron-containing compound comprises at least one in boric acid, borate, boron oxide.Borate can be sodium borate decahydrate (abbreviation borax), Firebrake ZB, potassium borate etc.
The method of the air permeance resistance of lifting paper provided by the invention, concrete steps are, first provide by the formulated surface size of at least one in natural polymer Cypres, synthesis high molecular form surface sizing agent, boron-containing compound is added again in surface size, mix, then utilize the surface size of gained in above-mentioned steps to carry out applying glue to paper surface.
Wherein, described natural polymer Cypres comprises at least one in animal glue, starch, wax size, and described synthesis high molecular form surface sizing agent comprises at least one in methylcellulose, carboxymethyl cellulose, polyvinyl alcohol, polyacrylamide polyurethane; Described boron-containing compound comprises at least one in boric acid, borate, boron oxide.Borate can be borax, Firebrake ZB, potassium borate etc., and visual demand adds at least one wherein.The addition of described boron-containing compound is the 0.1%-10% of Cypres absolute dry mass.
Surface size provided by the invention, owing to having boron-containing compound, can increase the viscosity of surface size, thus can make Cypres farthest for filling up the space on paper surface, and the air permeance resistance of paper is promoted.
Borax is semi-transparent clear monoclinic crystal, during hydrolysis centered by boron oxygen ion, can with the hydroxy combining in sizing agent, form complex compound, thus the viscosity of glue application solution increased.Boric acid is phosphorus sheet or the hexagonal three tiltedly crystallization of white crystalline powder or colourless micro-band pearl shape gloss.Boric acid significantly improves applying glue intensity by cross-bond hydroxyl, promotes the filming performance of surface size.The borate of the other types such as Firebrake ZB, potassium borate contains tetraboric acid root, has two BO3 plane triangles and two BO4 tetrahedrons to be tied by sharing angle top O atom in tetraboric acid root.Hydroxy combining in center and sizing agent, adds applying glue intensity, promotes the filming performance of surface size.There is in boron oxide the network structure be formed by connecting by sharing oxygen atom partial order by many triangle BO3 unit, wherein preponderating with the hexatomic ring B3O3 that boron oxygen is alternate.In this hexatomic ring, boron atom is three-fold coordination, and oxygen atom is two coordinations.Be combined with sizing agent by this kind of structure, can improve, improve sizing efficiency, promote surface size filming performance.
Advantages found of the present invention exists: one, in surface size, add boron-containing compound, and its addition is very little just can the air permeance resistance of lifting paper clearly.Easy to operate lifting successful that is simple, paper air permeance resistance simultaneously.Two, in surface size, add boron-containing compound, just the process of effects on surface glue application solution, does not therefore affect paper physical indexs such as the bulk of paper, every intensity, opacities, namely can not have any negative impact to the quality of paper.
The present invention is further illustrated below by with different control experiment groups.
Example 1:
Enzymatic starch is mixed with surface size.Borax is mixed with the solution of 3% concentration again, is then added in surface size, mixes, the addition of borax is 0.1% of the absolute dry mass of enzymatic starch.Then with the surface size after above-mentioned interpolation borax and the surface size that do not add borax, two-sided top sizing experiment is carried out to paper respectively.Before top sizing, the raw material, physical property etc. of two groups of paper are identical.Carry out dependence test to two groups of paper after applying glue, experimental result is as shown in the table.Wherein control group is the experimental data adopting the surface size not adding borax paper to be carried out to two-sided top sizing.
From following table, its air permeance resistance of paper adopting the surface size of the borax of interpolation 0.1% to carry out top sizing has better performance.
| Scheme | Control group | Add 0.1% borax |
| Basic weight g/m 2 | 72.9 | 73.5 |
| Air permeance resistance s/100ml | 108.3 | 114.4 |
Example 2:
Enzymatic starch is mixed with surface size.Borax is mixed with the solution of 3% concentration again, is added in surface size, mixes, the addition of borax is 10% of enzymatic starch absolute dry mass.Then with the surface size after above-mentioned interpolation borax and the surface size that do not add borax, two-sided top sizing experiment is carried out to paper respectively.Before top sizing, the raw material, physical property etc. of two groups of paper are identical.Carry out dependence test to two groups of paper after applying glue, experimental result is as shown in the table.Wherein control group is the experimental data adopting the surface size not adding borax paper to be carried out to two-sided top sizing.
From following table, its air permeance resistance tool of paper adopting the surface size of the borax of interpolation 10% to carry out top sizing improves significantly.By the contrast of example 2 with example 1, after can finding that borax adds quantitative change greatly, the air permeance resistance of the size press coated paper of its gained also becomes large immediately.
| Scheme | Control group | Add 10% borax |
| Basic weight g/m 2 | 72.9 | 73.6 |
| Air permeance resistance s/100ml | 108.3 | 260.5 |
Example 3:
Oxidized starch is mixed with surface size.Again borax and Firebrake ZB are mixed with respectively the solution of 3% concentration, by the absolute dry mass ratio mixing of 1:9, are added in surface size.
The total addition level of boron-containing compound (being also the mixture of borax and Firebrake ZB) is 0.1% of oxidized starch absolute dry mass.
Then with the surface size after above-mentioned interpolation boron-containing compound and the surface size that do not add boron-containing compound, two-sided top sizing experiment is carried out to paper respectively.Before top sizing, the raw material, physical property etc. of two groups of paper are identical.Carry out dependence test to two groups of paper after applying glue, experimental result is as shown in the table.Wherein control group is the experimental data adopting the surface size not adding boron-containing compound paper to be carried out to two-sided top sizing.
From following table, its air permeance resistance of paper adopting the surface size of the borax of interpolation 0.1% and the mixture of Firebrake ZB to carry out top sizing has better performance.
| Scheme | Control group | Add 0.1% boron-containing compound |
| Basic weight g/m 2 | 72.9 | 74.0 |
| Air permeance resistance s/100ml | 108.3 | 112.6 |
Example 4:
Oxidized starch is mixed with surface size.Again borax and Firebrake ZB are mixed with respectively the solution of 3% concentration, by the absolute dry mass ratio mixing of 9:1, are added in surface size.
The total addition level of boron-containing compound (being also the mixture of borax and Firebrake ZB) is 0.1% of oxidized starch absolute dry mass.
Then with the surface size after above-mentioned interpolation boron-containing compound and the surface size that do not add boron-containing compound, two-sided top sizing experiment is carried out to paper respectively.Before top sizing, the raw material, physical property etc. of two groups of paper are identical.Carry out dependence test to two groups of paper after applying glue, experimental result is as shown in the table.Wherein control group is the experimental data adopting the surface size not adding boron-containing compound paper to be carried out to two-sided top sizing.
From following table, its air permeance resistance of paper adopting the surface size of the borax of interpolation 0.1% and the mixture of Firebrake ZB to carry out top sizing has better performance.By the contrast of example 4 with example 3, can find that borax and Firebrake ZB are under total addition level is the prerequisite of 0.1%, the impact of proportioning on the air permeance resistance of paper changing borax and Firebrake ZB is little.
| Scheme | Control group | Add 0.1% boron-containing compound |
| Basic weight g/m 2 | 72.9 | 73.9 |
| Air permeance resistance s/100ml | 108.3 | 112.4 |
Example 5:
Enzymatic starch is mixed with surface size.Again borax and Firebrake ZB are mixed with respectively the solution of 3% concentration, by the absolute dry mass ratio mixing of 1:9, are added in surface size.
The total addition level of boron-containing compound (being also the mixture of borax and Firebrake ZB) is 5% of enzymatic starch absolute dry mass.
Then with the surface size after above-mentioned interpolation boron-containing compound and the surface size that do not add boron-containing compound, two-sided top sizing experiment is carried out to paper respectively.Before top sizing, the raw material, physical property etc. of two groups of paper are identical.Carry out dependence test to two groups of paper after applying glue, experimental result is as shown in the table.Wherein control group is the experimental data adopting the surface size not adding boron-containing compound paper to be carried out to two-sided top sizing.
From following table, its air permeance resistance of paper adopting the surface size of the borax of interpolation 5% and the mixture of Firebrake ZB (absolute dry mass is than 1:9) to carry out top sizing has better performance.
| Scheme | Control group | Add 5% boron-containing compound |
| Basic weight g/m 2 | 72.9 | 73.8 |
| Air permeance resistance s/100ml | 108.3 | 115.4 |
Example 6:
Oxidized starch is mixed with surface size.Again borax and Firebrake ZB are mixed with respectively the solution of 3% concentration, by the absolute dry mass ratio mixing of 9:1, are added in surface size.
The total addition level of boron-containing compound (being also the mixture of borax and Firebrake ZB) is 5% of oxidized starch absolute dry mass.
Then with the surface size after above-mentioned interpolation boron-containing compound and the surface size that do not add boron-containing compound, two-sided top sizing experiment is carried out to paper respectively.Before top sizing, the raw material, physical property etc. of two groups of paper are identical.Carry out dependence test to two groups of paper after applying glue, experimental result is as shown in the table.Wherein control group is the experimental data adopting the surface size not adding boron-containing compound paper to be carried out to two-sided top sizing.
From following table, its air permeance resistance tool of paper adopting the surface size of the borax of interpolation 5% and the mixture of Firebrake ZB (absolute dry mass is than 9:1) to carry out top sizing improves significantly.By the contrast of example 6 with example 5, can find that borax and Firebrake ZB are under total addition level is the prerequisite of 5%, the impact of ratio on the air permeance resistance of paper changing borax is larger.
| Scheme | Control group | Add 5% boron-containing compound |
| Basic weight g/m 2 | 72.9 | 73.6 |
| Air permeance resistance s/100ml | 108.3 | 252.8 |
The present invention adds at least one boron-containing compound in the surface size of paper, and fully carry out top sizing to paper again after mixing, method is simple, and on indexs such as the bulk of paper, every intensity, opacities without any impact.As long as its addition of this boron-containing compound added is the 0.1%-10% of surface size absolute dry mass simultaneously, the air permeance resistance of paper just can be significantly improved effect.
The surface size of the present invention to routine processes, the surface size configured after adding at least one boron-containing compound wherein carries out applying glue to paper again, except simple process, owing to being add boron-containing compound in the surface size prepared, boron-containing compound is made to be able to fully to contact with Cypres such as starch wherein, mix, contribute to the hydrolysis of boron-containing compound, thus with the hydroxy combining in sizing agent, form complex compound, effectively to promote paper air permeance resistance.Further, adopt the mode of adding boron-containing compound after in using, according to needs of production, the consumption of boron-containing compound can also be regulated, thus meet actual production requirement.
Claims (10)
1. a surface size, for carrying out applying glue to paper surface, this surface size is by natural polymer Cypres, the material that at least one in synthesis high molecular form surface sizing agent and at least one boron-containing compound form is formulated, described natural polymer Cypres comprises animal glue, starch, at least one in wax size, described synthesis high molecular form surface sizing agent comprises methylcellulose, carboxymethyl cellulose, polyvinyl alcohol, at least one in polyacrylamide polyurethane, described boron-containing compound comprises boric acid, borate, at least one in boron oxide, the addition of described boron-containing compound is the 0.1%-10% of Cypres absolute dry mass.
2. surface size as claimed in claim 1, is characterized in that: described borate is one or more in borax, Firebrake ZB, potassium borate.
3. surface size as claimed in claim 1, is characterized in that: by enzymatic starch and borax formulated, the addition of borax is 0.1% or 10% of the absolute dry mass of enzymatic starch.
4. surface size as claimed in claim 1, is characterized in that: formulated by oxidized starch, Firebrake ZB and borax, and borax and Firebrake ZB absolute dry mass are than being 1:9, and the total addition level of borax and Firebrake ZB is 0.1% of the absolute dry mass of oxidized starch.
5. surface size as claimed in claim 1, is characterized in that: formulated by oxidized starch, Firebrake ZB and borax, and borax and Firebrake ZB absolute dry mass are than being 9:1, and the total addition level of borax and Firebrake ZB is 0.1% of the absolute dry mass of oxidized starch.
6. surface size as claimed in claim 1, is characterized in that: formulated by enzymatic starch, Firebrake ZB and borax, and borax and Firebrake ZB absolute dry mass are than being 1:9, and the total addition level of borax and Firebrake ZB is 5% of the absolute dry mass of enzymatic starch.
7. surface size as claimed in claim 1, is characterized in that: formulated by oxidized starch, Firebrake ZB and borax, and borax and Firebrake ZB absolute dry mass are than being 9:1, and the total addition level of borax and Firebrake ZB is 5% of the absolute dry mass of oxidized starch.
8. promote a method for paper air permeance resistance, comprising:
There is provided by the formulated surface size of at least one in natural polymer Cypres, synthesis high molecular form surface sizing agent, wherein, described natural polymer Cypres comprises at least one in animal glue, starch, wax size, and described synthesis high molecular form surface sizing agent comprises at least one in methylcellulose, carboxymethyl cellulose, polyvinyl alcohol, polyacrylamide polyurethane;
In surface size, add boron-containing compound, mix, wherein, described boron-containing compound comprises at least one in boric acid, borate, boron oxide, and the addition of described boron-containing compound is the 0.1%-10% of Cypres absolute dry mass; And
The surface size of gained in above-mentioned steps is utilized to carry out applying glue to paper surface.
9. method as claimed in claim 8, is characterized in that: described borate is one or more in borax, Firebrake ZB, potassium borate.
10. method as claimed in claim 8 or 9, is characterized in that: boron-containing compound is first mixed with solution, then is added in surface size by boron-containing compound solution.
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| CN111041889B (en) * | 2019-12-13 | 2022-04-29 | 保定钞票纸业有限公司 | Glue solution for paper surface treatment, paper treatment method, obtained paper and application thereof |
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