CN104452448A - Starch surface sizing liquid production process and starch surface sizing liquid - Google Patents
Starch surface sizing liquid production process and starch surface sizing liquid Download PDFInfo
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- CN104452448A CN104452448A CN201310414040.6A CN201310414040A CN104452448A CN 104452448 A CN104452448 A CN 104452448A CN 201310414040 A CN201310414040 A CN 201310414040A CN 104452448 A CN104452448 A CN 104452448A
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Abstract
The invention relates to a starch surface sizing liquid production process, which comprises the following steps: providing enzymatic conversed modified starch solution; adding a crosslinking accelerator accounting for 0.5% ~ 1.5% of over dry mass of enzymatic conversed modified starch and a crosslinking agent accounting for 1% ~ 3% of over dry mass of the enzymatic conversed modified starch into the enzymatic conversed modified starch solution for cross linking reaction of the enzymatic conversed modified starch solution under the effect of the crosslinking accelerator and the crosslinking agent to obtain the starch surface sizing liquid. The invention also relates to the starch surface sizing liquid. Compared with the prior art, the viscosity of the starch surface sizing liquid prepared by the starch surface sizing liquid production process is stable, and can improve the permeability resistance and surface strength of paper.
Description
Technical field
The present invention relates to a kind of starch surface sizing liquid production technology and starch surface sizing liquid.
Background technology
The surface property of development to Cultural Paper, wrapping paper of press is had higher requirement, and impels paper industry constantly to seek new surface sizing techniques.
Starch as topmost Cypres generally through modified use; comprise oxidized starch, enzymically modified starch, acidified starch, acetylated starch, cationic starch, hydroxyalkyl starch, cationic starch, phosphate ester starch, acetate starch, graft copolymerization starch etc.Apply generally enzymatic conversion modified starch in Cultural Paper field at present, its principle is the cut-out being carried out by native starch strand to a certain degree by enzymatic conversion effect, to meet paper machine top sizing mobility and resin added requirement.
Enzymatic conversion modified starch surface size can form good film on body paper surface and cover, and improves paper surface seal (can air permeance resistance/air permeability weigh), improves surface strength and the water resistant ability of paper simultaneously.But Cultural Paper is within the scope of 40g ~ 200g/m2 grammes per square metre, adopts the top sizing of starch glue to improve effect to paper surface seal and there is larger difference.In the suitable situation of resin added, the applying glue of simple enzyme conversion modified starch is obviously better than lightweight paper to high grammes per square metre (ground paper) surperficial seal improvement ability and opens (thin paper), even if improve the resin added of low grammes per square metre thin paper, improves amplitude also very limited.
For head it off, factory is when to tissue surfaces applying glue, a certain proportion of synthetic surface sizing agent (as PVA etc.) is added in general meeting in starch glue, improve the surperficial seal of top sizing to tissue web to improve, but increase in starch glue and use synthetic surface sizing agent, table gelatin viscosity can be caused to raise, when consumption is slightly large, by affecting applying glue operation, (viscosity of surface size need meet the requirement of machinery applying glue range of viscosities, the too high meeting of viscosity causes applying glue inequality), in addition the interpolation of synthetic sizing agent causes table glue cost increase more, therefore effects on surface seal require higher low grammes per square metre or in high grammes per square metre body paper top sizing time, sizing equipment is to the viscosity requirement of starch glue, and the requirement of cost control aspect, limit the use amount of synthetic sizing agent, cause and be difficult to reach desirable control range to the surperficial seal improvement of part grammes per square metre paper kind.
Summary of the invention
In view of this, provide a kind of starch surface sizing liquid production technology that can solve the problem and starch surface sizing liquid real in necessary.
A kind of starch surface sizing liquid production technology, it comprises the steps: to provide enzymatic conversion modified starch liquid; In described enzymatic conversion modified starch liquid, add the crosslinking agent that the crosslinking accelerator that quality is described enzymatic conversion modified starch oven-dry weight 0.5% ~ 1.5% and quality are described enzymatic conversion modified starch oven-dry weight 1% ~ 3%, to make described enzymatic conversion modified starch liquid, cross-linking reaction occurs under the effect of crosslinking accelerator, crosslinking agent and obtain starch surface sizing liquid.
Preferably, described ative starch is selected from one or more in tapioca, cornstarch, wheaten starch, farina.
Preferably, described enzymatic conversion modified starch liquid adopts following steps preparation: added water by ative starch and be mixed with the starch suspension emulsion that concentration is 20 ~ 30%; α-amylase is added to prepare the first mixed liquor in described starch suspension emulsion, wherein, relative ative starch oven-dry weight, the use amount of described α-amylase is 100ppm ~ 120ppm; Described first mixed liquor is made to react 30min at 55 ~ 85 DEG C; Continue to be warming up to 105 DEG C afterwards and keep 10min, to kill the activity of α-amylase residual in described first mixed liquor, finally the temperature of described first mixture system is adjusted to 55 ~ 60 DEG C of insulations, obtains described enzymatic conversion modified starch liquid.
Preferably, described crosslinking accelerator is at least one in potassium sulfate, sodium sulphate or sodium chloride.
Preferably, described crosslinking agent be selected from glyoxal, one or more in boric acid and borate.
Preferably, described crosslinking agent is borax.
Preferably, before described starch surface sizing liquid is used for applying glue, the step that described starch surface sizing liquid is diluted also is comprised further.
Preferably, be: keep the temperature of described starch surface sizing liquid at 55 ~ 60 DEG C under the condition stirred, in described starch surface sizing liquid, add water that described starch surface sizing liquid is diluted to the step that described starch surface sizing liquid dilutes simultaneously.
A kind of starch surface sizing liquid, it adopts starch surface sizing liquid production technology as above to be prepared from.
Preferably, the solid content of described starch surface sizing liquid is when the scope of 10% ~ 14%, and its range of viscosities at 60 DEG C is 10cps ~ 16cps.
The present invention is on enzymatic conversion gelatinized starch preparation technology basis, the online crosslinking technological of innovation and application, under crosslinking accelerator exists, utilize crosslinking agent and enzymatic conversion modified starch generation cross-linking reaction to form network-like cross-linked structure, the starch surface sizing liquid tool prepared by above-mentioned technique provided by the present invention is had the following advantages: (1) due to the cost of crosslinking agent and crosslinking accelerator relatively very low, therefore, compared with prior art, prepared by starch surface sizing liquid and preparation method thereof provided by the present invention, the preparation cost of starch surface sizing liquid does not out increase substantially, (2) cross-linking reaction between crosslinking agent and enzymatic conversion modified starch makes starch glue obtain good stablizing because enzymatic conversion degree difference or the amylan fluid viscosity that additionally adds other synthetic surface sizing agents and cause fluctuates, therefore, the starch surface sizing liquid phase ratio produced with existing technique, stablize via the starch surface sizing fluid viscosity obtained by above-mentioned starch surface sizing liquid production technology provided by the present invention, can directly use, without the need to additionally adding polymer Surface Sizing Agent again, (3) cross-linking reaction between crosslinking agent and enzymatic conversion modified starch can also give the raising of starch glue partial properties, compared with the paper of the starch surface sizing liquid using existing technique to produce, the air permeance resistance of the paper using the starch surface sizing liquid obtained by above-mentioned starch surface sizing liquid production technology provided by the present invention to obtain improves more than 80%, surface strength can improve 28% at most, therefore, existing synthetic surface sizing agent can be substituted, thus significantly reduce applying glue cost.
Detailed description of the invention
The starch surface sizing liquid production technology that embodiment of the present invention provides, it comprises the steps:
S1, provides enzymatic conversion modified starch liquid;
In the present embodiment, described enzymatic conversion modified starch utilizes α-amylase carry out enzymatic conversion modification to ative starch and obtain, and its concrete preparation process comprises the steps: ative starch to add water and is mixed with the starch suspension emulsion that concentration is 20 ~ 30%; α-amylase is added to prepare the first mixed liquor in described starch suspension emulsion, wherein, relative ative starch oven-dry weight, the use amount of described α-amylase is 100ppm ~ 120ppm, that is, add the α-amylase of 100 ~ 120mg in the ative starch of 1kg; Described first mixed liquor is made to react 30min at 55 ~ 85 DEG C; Continue to be warming up to 105 DEG C afterwards and keep 10min, to kill the activity of α-amylase residual in described first mixed liquor, finally the temperature of described first mixture system is adjusted to 55 ~ 60 DEG C of insulations, obtains enzymatic conversion modified starch liquid.
In the present embodiment, described ative starch is selected from one or more in tapioca, cornstarch, wheaten starch, farina.
S2, in described enzymatic conversion modified starch liquid, add the crosslinking agent that the crosslinking accelerator that quality is described ative starch oven-dry weight 0.5% ~ 1.5% and quality are described ative starch oven-dry weight 1% ~ 3%, to make described enzymatic conversion modified starch liquid, cross-linking reaction occurs under the effect of crosslinking accelerator, crosslinking agent and obtain primary starch surface size.
In the present embodiment, be that under the condition of 55 ~ 60 DEG C, add crosslinking accelerator that quality is described ative starch oven-dry weight 0.5% ~ 1.5% and quality in described enzymatic conversion modified starch liquid be the crosslinking agent of described ative starch oven-dry weight 1% ~ 3%.
In this step, described crosslinking accelerator can be at least one in potassium sulfate, sodium sulphate or sodium chloride.In starch cross-linking process, adding of described crosslinking accelerator can make reaction evenly with effective, and easy to control.
Described crosslinking agent can be one or more in the borates such as borax or boric acid.
S3, dilutes to prepare the starch surface sizing liquid that mass percentage concentration is 10% ~ 15% to described primary starch surface size.
Add water to prepare the starch surface sizing liquid that mass percentage concentration is 10% ~ 15% in described primary starch surface size under the condition stirred.
In the present embodiment, described primary starch surface size is diluted and is undertaken by following manner: keep the temperature of described primary starch surface size at 55 ~ 60 DEG C, add water to prepare the starch surface sizing liquid that mass percentage concentration is 10% ~ 15% in described primary starch surface size simultaneously under the condition stirred.
Understandable, in this step, the object added water in described primary starch surface size dilutes to meet need of production to described primary starch surface size.According to different need of productions, also can change to the degree that described primary starch surface size dilutes, even, when described primary starch surface size is directly sold as product, also can not dilute described primary starch surface size.
Present invention also offers the starch surface sizing liquid adopting above-mentioned starch surface sizing liquid production technology to produce.
The starch surface sizing liquid that employing provided by the present invention above-mentioned starch surface sizing liquid production technology is produced can be directly used in body paper top sizing.Under usual condition, described starch surface sizing liquid provided by the present invention solid content in a state of use remains on the scope of 10% ~ 14%, within the scope of this, the range of viscosities of described starch surface sizing liquid at 60 DEG C is 10cps ~ 16cps, wherein, the viscosity of described starch surface sizing liquid when 10% contains admittedly is 10 ~ 12cps, and the viscosity when 12% contains admittedly is 13 ~ 15cps, and the viscosity when 14% contains admittedly is 14 ~ 16cps.
The present invention is on enzymatic conversion gelatinized starch preparation technology basis, the online crosslinking technological of innovation and application, under crosslinking accelerator exists, utilize crosslinking agent and enzymatic conversion modified starch generation cross-linking reaction to form network-like cross-linked structure, the starch surface sizing liquid tool prepared by above-mentioned technique provided by the present invention is had the following advantages: (1) due to the cost of crosslinking agent and crosslinking accelerator relatively very low, therefore, compared with prior art, prepared by starch surface sizing liquid and preparation method thereof provided by the present invention, the preparation cost of starch surface sizing liquid does not out increase substantially, (2) cross-linking reaction between crosslinking agent and enzymatic conversion modified starch makes starch glue obtain good stablizing because enzymatic conversion degree difference or the amylan fluid viscosity that additionally adds other synthetic surface sizing agents and cause fluctuates, therefore, the starch surface sizing liquid phase ratio produced with existing technique, stablize via the starch surface sizing fluid viscosity obtained by above-mentioned starch surface sizing liquid production technology provided by the present invention, can directly use, without the need to additionally adding polymer Surface Sizing Agent again, (3) cross-linking reaction between crosslinking agent and enzymatic conversion modified starch can also give the raising of starch glue partial properties, compared with the paper of the starch surface sizing liquid using existing technique to produce, the air permeance resistance of the paper using the starch surface sizing liquid obtained by above-mentioned starch surface sizing liquid production technology provided by the present invention to obtain improves more than 80%, surface strength can improve 28% at most, therefore, existing synthetic surface sizing agent can be substituted, thus significantly reduce applying glue cost.
Below, by specific embodiment, the present invention will be further described.
Comparative example: the preparation method of common starch surface size
275g ative starch (over dry 240g) is added in beaker, add water 525ml, the α-amylase 2.4ml of dilution 100 times is added after stirring, be placed in the water-bath temperature reaction of belt stirrer, 30min is reacted at 85 DEG C, then move in pressure cooker and take out after deactivation 10min at 105 DEG C, obtain the mixture that concentration is 30%; Get 250g said mixture temperature to be cooled to 60 DEG C and to be incubated, simultaneously Keep agitation under keeping warm mode; Get another beaker and add 250ml60 DEG C of hot water, the concentration this 250ml hot water slowly being added above-mentioned 250g is in the mixture of 30%, is incubated after mixing at 60 DEG C, to obtain common starch surface size, tests the viscosity of described starch surface sizing liquid; Utilize described starch surface sizing liquid to carry out applying glue to paper, and test air permeance resistance and the surface strength of paper.
Embodiment 1:
275g ative starch (over dry 240g) is added in beaker, add water 525ml, the α-amylase 2.4ml of dilution 100 times is added after stirring, be placed in the water-bath temperature reaction of belt stirrer, 30min is reacted at 85 DEG C, then move in pressure cooker and take out after deactivation 10min at 105 DEG C, obtain the mixture that concentration is 30%; Get 250g said mixture temperature to be cooled to 60 DEG C and to be incubated, simultaneously Keep agitation under keeping warm mode; Get another beaker and add 250ml60 DEG C of hot water, in water, add 0.35g potassium sulfate simultaneously, 0.75g borax is configured to dilution after fully dissolving; It is in the mixture of 30% that this 250ml dilution is slowly added above-mentioned 250g concentration, makes system react certain hour, obtain starch surface sizing liquid provided by the present invention afterwards, test the viscosity of described starch surface sizing liquid under keeping warm mode; Utilize described starch surface sizing liquid to carry out applying glue to paper, and test air permeance resistance and the surface strength of paper.
Embodiment 2: add 275g ative starch (over dry 240g) in beaker, add water 525ml, the α-amylase 2.4ml of dilution 100 times is added after stirring, be placed in the water-bath temperature reaction of belt stirrer, 30min is reacted at 85 DEG C, then move in pressure cooker and take out after deactivation 10min at 105 DEG C, obtain the mixture that concentration is 30%; Get 250g said mixture temperature to be cooled to 60 DEG C and to be incubated, simultaneously Keep agitation under keeping warm mode; Get another beaker and add 250ml60 DEG C of hot water, in water, add 0.75g potassium sulfate simultaneously, 1.5g borax is configured to dilution after fully dissolving; It is in the mixture of 30% that this 250ml dilution is slowly added above-mentioned 250g concentration, makes system react certain hour, obtain starch surface sizing liquid provided by the present invention afterwards, test the viscosity of described starch surface sizing liquid under keeping warm mode; Utilize described starch surface sizing liquid to carry out applying glue to paper, and test air permeance resistance and the surface strength of paper.
Embodiment 3: add 275g ative starch (over dry 240g) in beaker, add water 525ml, the α-amylase 2.4ml of dilution 100 times is added after stirring, be placed in the water-bath temperature reaction of belt stirrer, 30min is reacted at 85 DEG C, then move in pressure cooker and take out after deactivation 10min at 105 DEG C, obtain the mixture that concentration is 30%; Get 250g said mixture temperature to be cooled to 60 DEG C and to be incubated, simultaneously Keep agitation under keeping warm mode; Get another beaker and add 250ml60 DEG C of hot water, in water, add 1.125g potassium sulfate simultaneously, 2.25g borax is configured to dilution after fully dissolving; It is in the mixture of 30% that this 250ml dilution is slowly added above-mentioned 250g concentration, makes system react certain hour, obtain starch surface sizing liquid provided by the present invention afterwards, test the viscosity of described starch surface sizing liquid under keeping warm mode; Utilize described starch surface sizing liquid to carry out applying glue to paper, and test air permeance resistance and the surface strength of paper.
To the air permeance resistance of the paper that above-mentioned comparative example and embodiment obtain and surface strength test comparison result as follows:
Can be seen by above-mentioned experimental result, compared with comparative example, after the starch surface sizing liquid utilizing embodiment 1 to obtain carries out top sizing to paper, the air permeance resistance of paper improves 90%, and surface strength of paper improves 14.2; After the starch surface sizing liquid utilizing embodiment 2 to obtain carries out top sizing to paper, the air permeance resistance of paper improves 112.5%, and surface strength of paper improves 14.2%; After the starch surface sizing liquid utilizing embodiment 3 to obtain carries out top sizing to paper, the air permeance resistance of paper improves 170%, and surface strength of paper improves 28%.
In addition, those skilled in the art also can do other change in spirit of the present invention.Therefore these changes done according to the present invention's spirit, all should be included within the present invention's scope required for protection.
Claims (10)
1. a starch surface sizing liquid production technology, it comprises the steps:
Enzymatic conversion modified starch liquid is provided;
In described enzymatic conversion modified starch liquid, add the crosslinking agent that the crosslinking accelerator that quality is described enzymatic conversion modified starch oven-dry weight 0.5% ~ 1.5% and quality are described enzymatic conversion modified starch oven-dry weight 1% ~ 3%, to make described enzymatic conversion modified starch liquid, cross-linking reaction occurs under the effect of crosslinking accelerator, crosslinking agent and obtain starch surface sizing liquid.
2. starch surface sizing liquid production technology as claimed in claim 1, is characterized in that: described ative starch be selected from tapioca, cornstarch, wheaten starch, farina one or more.
3. starch surface sizing liquid production technology as claimed in claim 1, is characterized in that, described enzymatic conversion modified starch liquid adopts following steps preparation: added water by ative starch and be mixed with the starch suspension emulsion that concentration is 20 ~ 30%; α-amylase is added to prepare the first mixed liquor in described starch suspension emulsion, wherein, relative ative starch oven-dry weight, the use amount of described α-amylase is 100ppm ~ 120ppm; Described first mixed liquor is made to react 30min at 55 ~ 85 DEG C; Continue to be warming up to 105 DEG C afterwards and keep 10min, to kill the activity of α-amylase residual in described first mixed liquor, finally the temperature of described first mixture system is adjusted to 55 ~ 60 DEG C of insulations, obtains described enzymatic conversion modified starch liquid.
4. starch surface sizing liquid production technology as claimed in claim 1, is characterized in that: described crosslinking accelerator is at least one in potassium sulfate, sodium sulphate or sodium chloride.
5. starch surface sizing liquid production technology as claimed in claim 1, is characterized in that: described crosslinking agent be selected from boric acid and borate one or more.
6. starch surface sizing liquid production technology as claimed in claim 1, is characterized in that: described crosslinking agent is borax.
7. starch surface sizing liquid production technology as claimed in claim 1, is characterized in that: before described starch surface sizing liquid is used for applying glue, also comprise the step of diluting described starch surface sizing liquid further.
8. starch surface sizing liquid production technology as claimed in claim 7, it is characterized in that, be: keep the temperature of described starch surface sizing liquid at 55 ~ 60 DEG C under the condition stirred, in described starch surface sizing liquid, add water that described starch surface sizing liquid is diluted to the step that described starch surface sizing liquid dilutes simultaneously.
9. a starch surface sizing liquid, is characterized in that: described starch surface sizing liquid adopts the starch surface sizing liquid production technology as described in any one of claim 1 ~ 8 to be prepared from.
10. starch surface sizing liquid as claimed in claim 9, is characterized in that: the solid content of described starch surface sizing liquid is when the scope of 10% ~ 14%, and its range of viscosities at 60 DEG C is 10cps ~ 16cps.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107083712A (en) * | 2017-06-20 | 2017-08-22 | 台州森林造纸有限公司 | A kind of high-strength corrugated base paper and preparation method thereof |
| CN108411696A (en) * | 2018-03-09 | 2018-08-17 | 金东纸业（江苏）股份有限公司 | A kind of coating starch and preparation method thereof, papermaking paint |
| CN108708215A (en) * | 2018-03-29 | 2018-10-26 | 句容市茂源织造厂 | A kind of preparation method of starch base paper surface-sizing agent |
| CN111218845A (en) * | 2020-01-14 | 2020-06-02 | 广西金桂浆纸业有限公司 | Method and device for preparing sizing glue solution |
| CN113861299A (en) * | 2021-10-19 | 2021-12-31 | 山东寿光巨能金玉米开发有限公司 | Environment-friendly production method of surface glue starch for papermaking |
| CN115262274A (en) * | 2022-07-18 | 2022-11-01 | 江苏博汇纸业有限公司 | Preparation process of paper surface sizing starch |
| CN116732821A (en) * | 2023-07-03 | 2023-09-12 | 山东仁丰特种材料股份有限公司 | Method for producing gluing type medical dialysis base paper by using fourdrinier vat paper machine |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107083712A (en) * | 2017-06-20 | 2017-08-22 | 台州森林造纸有限公司 | A kind of high-strength corrugated base paper and preparation method thereof |
| CN107083712B (en) * | 2017-06-20 | 2019-02-12 | 台州森林造纸有限公司 | A kind of high-strength corrugated base paper and preparation method thereof |
| CN108411696A (en) * | 2018-03-09 | 2018-08-17 | 金东纸业（江苏）股份有限公司 | A kind of coating starch and preparation method thereof, papermaking paint |
| CN108708215A (en) * | 2018-03-29 | 2018-10-26 | 句容市茂源织造厂 | A kind of preparation method of starch base paper surface-sizing agent |
| CN111218845A (en) * | 2020-01-14 | 2020-06-02 | 广西金桂浆纸业有限公司 | Method and device for preparing sizing glue solution |
| CN113861299A (en) * | 2021-10-19 | 2021-12-31 | 山东寿光巨能金玉米开发有限公司 | Environment-friendly production method of surface glue starch for papermaking |
| CN115262274A (en) * | 2022-07-18 | 2022-11-01 | 江苏博汇纸业有限公司 | Preparation process of paper surface sizing starch |
| CN116732821A (en) * | 2023-07-03 | 2023-09-12 | 山东仁丰特种材料股份有限公司 | Method for producing gluing type medical dialysis base paper by using fourdrinier vat paper machine |
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Application publication date: 20150325 |