CN104963240B - Coated paper and making method thereof - Google Patents
Coated paper and making method thereof Download PDFInfo
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- CN104963240B CN104963240B CN201510324215.3A CN201510324215A CN104963240B CN 104963240 B CN104963240 B CN 104963240B CN 201510324215 A CN201510324215 A CN 201510324215A CN 104963240 B CN104963240 B CN 104963240B
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Abstract
The invention discloses coated paper and a making method thereof. The making method includes: enabling a starch crosslinking agent and hydroxy-containing small-molecule substance to react for 2-4h at temperature of 40-70 DEG C to obtain a passivation crosslinking agent, wherein molecular weight of the hydroxy-containing small-molecule substance is smaller than 1000; mixing the passivation crosslinking agent with a starch solution to obtain sizing liquid; using the sizing liquid to size at least one face of raw paper; using alkaline coating liquid to coat at least one face of the raw paper to obtain the coated paper. By the making method, the sizing liquid with proper viscosity is obtained, so that high sizing operability in the process of production is guaranteed while the coated paper which is high in quality can be made.
Description
Technical field
The present invention relates to field of papermaking, more particularly to a kind of manufacture method of coating paper and coating paper.
Background technology
In paper industry, it is the water-resistance for improving coating paper, obtains high-quality coating paper, it usually needs after manufacturing paper with pulp
Body paper surface carries out applying glue.In general, for coating paper can reach, preferable water-resistance strengthens effect to high-viscosity sizing agent
Really.
But during paper machine carries out top sizing, if obtaining high-quality coating paper and adopting high viscosity
Sizing agent, then the problems such as applying glue uneven, excessive resin added and viscous cylinder occurs, affect then the applying glue runnability of paper machine,
Production is smoothed out.
For solving the problems, such as that viscosity height causes applying glue runnability bad, using the side for reducing sizing agent solid content in the industry
Method, but adopting to increase the burden of follow-up drying process in this way, cause the risk of disconnected paper, and easily cause applying glue not
, resin added is difficult to the problem for maintaining, although applying glue runnability is improved, but cannot obtain high-quality coating paper.
The content of the invention
Present invention mainly solves high-quality coating cannot be obtained in prior art while good applying glue runnability is ensured
The problem of paper.
For solving above-mentioned technical problem, the present invention proposes a kind of manufacture method of coating paper, and the method comprising the steps of：Make shallow lake
Powder cross-linking agent is reacted 2～4 hours under conditions of 40 DEG C～70 DEG C with hydroxyl small-molecule substance, is obtained being passivated cross-linking agent, is contained
The molecular weight of hydroxyl small-molecule substance is less than 1000；Passivation cross-linking agent is mixed with starch solution, glue application solution is obtained；Using applying glue
Liquid carries out applying glue at least one side in body paper；At least one side in the body paper after applying glue is applied using alkaline coating fluid
Cloth, obtains coating paper.
Wherein, manufacture method further includes step：Manufacture paper with pulp acquisition body paper.
Wherein, during starch cross-linking agent includes phosphorus oxychloride, sodium hexameta phosphate, boric acid, adipic acid, Borax, epoxychloropropane
One or more.
Wherein, hydroxyl small-molecule substance include one kind in glycerol, glucose, ethylene glycol, xylitol, Sorbitol or
It is various.
Wherein, the pH value of alkaline coating fluid is 9.0～10.0.
Wherein, starch cross-linking agent is made to react under conditions of 40 DEG C～70 DEG C 2～4 hours with hydroxyl small-molecule substance
In step：The oven-dry weight ratio of starch cross-linking agent and hydroxyl small-molecule substance is 10:90～40:60.
Wherein, in the step of passivation cross-linking agent being mixed with starch solution：The passivation cross-linking agent and the starch solution
Oven-dry weight ratio be 2:50～6:30.
Wherein, the solid content of alkaline coating fluid is 55%～70%.
Wherein, in the step of carrying out applying glue using glue application solution at least one side in body paper, one side resin added is 1.6g/m2
～1.8g/m2, which represents that glue application solution of the every square metre of body paper using oven-dry weight for 1.6g～1.8g carries out applying glue.
Wherein, in the step of being coated at least one side in the body paper after applying glue using alkaline coating fluid, one side is applied
Cloth amount is 17g/m2～23g/m2, which represents that every square metre of body paper is 17g/m using oven-dry weight2～23g/m2Alkaline coating fluid
It is coated.
For solving above-mentioned technical problem, the present invention also provides a kind of coating paper, and the coating paper is obtained by above-mentioned manufacture method.
The beneficial effects of the present invention is, by starch cross-linking agent and hydroxyl small-molecule substance in the manufacture method of coating paper
React 2～4 hours under conditions of 40 DEG C～70 DEG C, obtain being passivated cross-linking agent, the molecular weight of hydroxyl small-molecule substance is less than
1000；Again passivation cross-linking agent is mixed with starch solution, glue application solution is obtained；Due to starch cross-linking agent with hydroxyl small molecule
Material reacts, therefore that during starch-mixed, obtaining crosslinked group in cross-linking agent will not be contacted with the hydroxyl of starch,
Starch will not crosslink reaction, therefore the applying glue fluid viscosity obtained during this will not increase；Using the glue application solution pair
During at least one side in body paper carries out applying glue, as applying glue fluid viscosity is not high, therefore applying glue runnability is good；Applying glue
After the completion of at least one side in the body paper after applying glue is coated using alkaline coating fluid, obtain coating paper.The coating of alkalescence
By glue application solution under alkaline environment, the crosslinked group of wherein cross-linking agent discharges liquid again, makes starch crosslink reaction, carries
The high viscosity of sizing agent, obtains high-quality coating paper.Improve sizing agent in coating process after glue-applying technique of the present invention again
Viscosity, it is ensured that applying glue runnability good in Process of Applying Glue, while having obtained high-quality coating paper.
Specific embodiment
The manufacture method of coating paper proposed by the present invention is comprised the following steps：
S101：Obtain body paper.
The body paper required for subsequent step is provided in this step, and the body paper can be obtained by being processed by itself papermaking process,
Also can be obtained by outside buying.
By acquisition body paper of manufacturing paper with pulp in the present embodiment, the property of the body paper, quality, specification etc. are determined by specific production requirement
It is fixed.Papermaking process is technique common in paper industry, and here is not described.
S102：Starch cross-linking agent is made to react 2～4 hours under conditions of 40 DEG C～70 DEG C with hydroxyl small-molecule substance,
Obtain being passivated cross-linking agent.
In this step, the crosslinked group in starch cross-linking agent is reacted with the hydroxyl of hydroxyl small-molecule substance, because
When this adds starch in reacted solution, the crosslinked group will not be come in contact with the hydroxyl of starch, and starch will not occur
Crosslinking.The solution obtained after starch cross-linking agent is reacted with hydroxyl small-molecule substance becomes passivation cross-linking agent.
For its reaction condition, can be controlled by heating in water bath, or starch cross-linking agent and hydroxyl small molecule are divided
Not Jia Re after mix, control temperature setting for 60 DEG C in the present embodiment, set of time is 3 hours.When needing to shorten man-hour, carry
During high production capacity, it can be also 2 hours by set of time, temperature does corresponding adjustment also dependent on specific requirement.
Wherein starch cross-linking agent is from phosphorus oxychloride, sodium hexameta phosphate, boric acid, adipic acid, Borax, epoxychloropropane
One or more.
And hydroxyl small-molecule substance, its molecular weight is represented less than 1000, in general from glycerol, glucose, second
One or more in glycol, xylitol, Sorbitol.
And the oven-dry weight ratio of starch cross-linking agent and hydroxyl small-molecule substance is 10:90～40:60.For concrete chemistry
Material and oven-dry weight ratio, can make different selections according to practical situation.
S103：Passivation cross-linking agent is mixed with starch solution, glue application solution is obtained.
According to the above-mentioned description to S102, in step s 103, passivation cross-linking agent will not be crosslinked instead with starch solution
Should, the viscosity of glue application solution will not increase.
In this step, by oven-dry weight ratio be 2:50～6:30 passivation cross-linking agent and starch solution are mixed, and are obtained
To glue application solution.
It is concrete produce in when configuring glue application solution, the consumption for being passivated cross-linking agent is 2kg/ tons paper～6kg/ ton paper, starch solution
Consumption be 30kg/ tons paper～50kg/ ton paper, i.e., paper per ton needs the passivation cross-linking agent solution of 2kg～6kg accordingly, and
The starch solution of 30kg～50kg, is wherein passivated cross-linking agent solution and the solid content of starch solution is 50%.Configuration glue application solution
When the passivation cross-linking agent and the starch solution of 50kg/ ton paper of 2kg/ ton paper can be selected to be mixed, 6kg/ ton paper also may be selected
Passivation cross-linking agent and the starch solution of 30kg/ ton paper mixed, the configuration mode employed in the present embodiment is 4kg/ tons
The starch solution of the passivation cross-linking agent and 40kg/ ton paper of paper is mixed.
In paper industry, can be according to the practical situation of production, the passivation cross-linking agent and starch of the different solid contents of configuration
The quality of passivation cross-linking agent and starch solution required for solution, therefore paper per ton also should be done according to oven-dry weight ratio accordingly
Adjustment.
S104：Applying glue is carried out at least one side in body paper using glue application solution.
For the different coating papers for requiring, one side applying glue or two-sided applying glue can be carried out, and one side applying glue can also be divided into one side
Double applying glues of single applying glue or one side, in the various resin application methods of the above, the one side resin added for carrying out applying glue every time is 1.6g/m2~
1.8g/m2, on the body paper of its per square metre of expression, applying glue is carried out using the glue application solution that oven-dry weight is 1.6g～1.8g.Need explanation
, when double applying glues of one side are to need to obtain thicker one side applying glue, in order to ensure it is follow-up the smooth of technique such as be dried, and incite somebody to action
Process of Applying Glue is divided into twice.
The viscosity of glue application solution has a great impact for the runnability of glue-applying technique in this step.In general work as applying glue
When fluid viscosity is higher than 13cps, the problems such as applying glue uneven, high resin added and viscous cylinder occurs in Process of Applying Glue.Therefore the present embodiment
In, it is to ensure good applying glue runnability, passivation cross-linking agent and starch solution is mixed to get into glue application solution so that in glue application solution
Starch will not be crosslinked, it is ensured that when carrying out applying glue, glue application solution has suitable viscosity, typically by viscosity control 9.5cps～
Between 11.5cps.
S105：At least one side in the body paper after applying glue is coated using alkaline coating fluid, obtains coating paper.
After glue-applying technique in step S104 is completed, typically by the body paper rolling static a period of time after applying glue, then enter
Row coating, that is, the body paper being coated have dry glue application layer.In this step, at least one side of body paper after applying glue is carried out
Coating, the coating can be carried out on the face of applying glue, also can be carried out on the face of non-applying glue, be to complete to apply in the present embodiment
It is coated on the face of glue.
When being coated using alkaline coating fluid, the moisture in coating fluid can be spread to the body paper with glue application layer, after
And glue application layer and original paper layer are under alkaline environment.And the crosslinked group of starch cross-linking agent and little point of hydroxyl in glue application layer
Hydroxy combining in sub- material, due to the hydroxyl small-molecule substance feature of itself, this combines and will release under alkaline environment, this
When crosslinked group starch can be made to crosslink reaction, improves the viscosity of glue application layer with the hydroxy combining of starch, the painting for obtaining
Cloth paper can have higher intensity and quality.
In this step, the alkaline coating fluid pH value for being used is 9.0～10.0, and its solid content is 55%～70%, single
Face coating weight is 17g/m2～23g/m2, which represents that alkaline coating fluid of the every square metre of body paper using oven-dry weight for 17g～23g enters
Row coating, generally from the coating fluid that solid content is 60%, and single spreading amount selects 20g/m2.These parameters can follow up reality
Border situation is adjusted accordingly.
Below by specific embodiment contrast experiment come the present invention is described further, refer to table one.
Table one：
In whole contrast experiment, a total of 6 experimental grouies correspond to comparative example 1, comparative example 2, comparative example 3, embodiment respectively
1st, embodiment 2 and embodiment 3.
In comparative example 1, glue application solution is directly made using starch solution in representing prior art for starch solution, the i.e. comparative example 1
For the scheme of glue application solution.
In comparative example 2, glue application solution is the mixed solution of borate cross-linking agent and starch, and in comparative example 3, glue application solution is epoxy chloropropionate
The mixed solution of alkane cross-linking agent and starch.
Comparative example 2,3 represents cross-linking agent used in prior art and improves applying glue fluid viscosity, improves then coating papery
The scheme of amount.
Pretreatment is carried out to cross-linking agent in embodiment 1, by epichlorohydrin crosslinker and glycerol, glucose, Sorbitol
React at 60 DEG C 2 hours, pretreated cross-linking agent and starch are mixed to get into glue application solution again then；To handing in embodiment 2
Connection agent carries out pretreatment, borate cross-linking agent and glycerol, ethylene glycol is reacted at 60 DEG C 3 hours, then again by after pretreatment
Cross-linking agent and starch be mixed to get glue application solution；Pretreatment is carried out to cross-linking agent in embodiment 3, by borax crosslinkers and glycerol
React under conditions of 60 DEG C 4 hours, pretreated cross-linking agent and starch are mixed to get into glue application solution again then.
Embodiment 1-3 represents the scheme that the present invention obtains glue application solution, and the difference of three is selected cross-linking agent, and
The difference of the hydroxyl small-molecule substance of pretreatment is carried out to cross-linking agent.
Whole contrast test compares comparative example 1-3 for representing prior art and the enforcement for representing technical solution of the present invention
Example 1-3.In order to illustrate the impact of the pretreatment for experimental result of cross-linking agent, in 6 experimental grouies, the choosing of other technological parameters
With essentially identical.
When glue application solution is configured, dosage of crosslinking agent is 4kg/ ton paper.Finally configure the applying glue fluid solid content for obtaining to be all provided with
12% is set to, the glue application solution of the identical solid content obtained in different experiments group there are different viscosity.
The glue application solution of comparative example 1：The viscosity of starch solution is 10cps；
The glue application solution of comparative example 2：Borate cross-linking agent is 12.9cps with the mixed viscosity of starch solution；
The glue application solution of comparative example 3：Epichlorohydrin crosslinker is 15.8cps with the mixed viscosity of starch solution；
The glue application solution of embodiment 1：Pretreatment epichlorohydrin crosslinker with the mixed viscosity of starch solution is
10.2cps；
The glue application solution of embodiment 2：Pretreatment borate cross-linking agent is 10.5cps with the mixed viscosity of starch solution；
The glue application solution of embodiment 3：Pretreatment borax crosslinkers are 11.5cps with the mixed viscosity of starch solution.
Can deduce that applying glue runnability is good and bad by the viscosity data of glue application solution, according to described above, when applying glue fluid viscosity surpasses
When crossing 13cps, Process of Applying Glue occurs that applying glue is uneven, resin added is high, viscous cylinder the problems such as, applying glue runnability is poor.It is inferred that
In experimental group, the poor and actual experimental result of the applying glue runnability of comparative example 2,3 is also identical in the result inferred.
It is in the Process of Applying Glue of 6 groups of experiments, as follows to the assessment result of applying glue runnability：Comparative example 2 it is poor, there is applying glue
Uneven problem；The applying glue runnability of comparative example 3 is very poor, occurs in that the problem of the uneven and viscous cylinder of applying glue；Other experimental grouies are applied
Glue runnability is preferable.
And after the completion of applying glue, generally use the effect for wax grade and air permeability being pulled out to assess body paper applying glue.Binding experiment
As a result be that physical property part understands after applying glue in table one, 1) comparative example 2 and comparative example 3 to pull out wax grade larger, and pull out wax grade and get over
The big surface strength for representing body paper after applying glue is bigger, thus it can also be seen that when applying glue fluid viscosity is larger, can obtain intensity it is larger,
The preferable paper of quality；2) air permeability of comparative example 2,3 is larger, and as applying glue is uneven, on body paper, the less part of glue application solution is saturating
Manner is larger, therefore occurs in that the larger situation of comparative example 2,3 air permeabilities.
After body paper in experiment to completing applying glue is estimated, reuses alkaline coating fluid and respectively which is coated, 6
In individual experimental group, the pH value of coating fluid is between 9.0～10.0, and single spreading amount is 20g/m2。
After the completion of coating, IGT surface strengths, glossiness and the air permeability of coating paper are measured.It is table one from experimental result
After middle coating, physical property part can be seen that, for the result of 6 experimental grouies of glossiness and air permeability is similar to；But it is strong for IGT surfaces
Degree, the result of comparative example 1 are poor, and the result of comparative example 2,3 and embodiment 1-3 is preferable, i.e., the coating paper for obtaining in comparative example 1
It is second-rate, and embodiment 1-3 has obtained the coating paper of good quality.
By more than, experiment can be seen that, although 1 applying glue runnability of comparative example is preferably, the paper quality for obtaining is poor；It is right
Although ratio 2,3 can obtain the preferable coating paper of quality, applying glue runnability is poor；And embodiment 1-3 can obtain matter
While measuring preferable coating paper, it is ensured that preferable applying glue runnability.
It should be noted that in above-mentioned experiment, in order to carry out state modulator, more preferable cross-linking reaction agent pretreatment it is excellent
Gesture；For the consumption of cross-linking agent, the solid content of starch solution, coating weight employ fixed parameter, in actual production, this
A little parameters all can be adjusted according to practical situation.And, although test above simply, but in actual production be also according to
Enter line parameter according to the embodiment in the experiment and technique is arranged, and equally achieve preferable production effect.
Prior art is different from, coating paper manufacture method of the present invention, first by starch cross-linking agent and hydroxyl
Small-molecule substance is reacted 2～4 hours under conditions of 40 DEG C～70 DEG C, obtains being passivated cross-linking agent, hydroxyl small-molecule substance
Molecular weight is less than 1000；Again passivation cross-linking agent is mixed with starch solution, glue application solution is obtained；Due to starch cross-linking agent with contain
Hydroxyl small-molecule substance reacts, therefore that during starch-mixed, obtaining crosslinked group in cross-linking agent will not be with starch
Hydroxyl contact, starch will not crosslink reaction, therefore the applying glue fluid viscosity obtained during this will not increase；Using
During the glue application solution carries out applying glue at least one side in body paper, due to applying glue fluid viscosity it is not high, therefore applying glue operating
Property is good；At least one side in the body paper after applying glue is coated using alkaline coating fluid after the completion of applying glue, obtains coating paper.
By glue application solution under alkaline environment, the crosslinked group of wherein cross-linking agent discharges the coating fluid of alkalescence again, makes starch occur to hand over
Connection reaction, improves the viscosity of sizing agent, obtains high-quality coating paper.Carried in coating process after glue-applying technique of the present invention again
The viscosity of high sizing agent, it is ensured that applying glue runnability good in Process of Applying Glue, while obtained high-quality coating paper.
Embodiments of the present invention are the foregoing is only, the scope of the claims of the present invention is not thereby limited, it is every using this
Equivalent structure or equivalent flow conversion that description of the invention content is made, or directly or indirectly it is used in other related technology necks
Domain, is included within the scope of the present invention.
Claims (9)
1. a kind of manufacture method of coating paper, it is characterised in that the manufacture method includes step：
Starch cross-linking agent is reacted 2～4 hours under conditions of 40 DEG C～70 DEG C with hydroxyl small-molecule substance, obtain passivation and hand over
Connection agent, the molecular weight of the hydroxyl small-molecule substance are less than 1000, the starch cross-linking agent and the hydroxyl small molecule thing
The oven-dry weight ratio of matter is 10:90～40:60；
The passivation cross-linking agent is mixed with starch solution, glue application solution, the passivation cross-linking agent and the starch solution is obtained
Oven-dry weight ratio is 2:50～6:30；
Applying glue is carried out at least one side in body paper using the glue application solution；
Using alkaline coating fluid to applying glue after the body paper at least one side be coated, obtain the coating paper.
2. manufacture method according to claim 1, it is characterised in that the manufacture method further includes step：
Manufacture paper with pulp and obtain the body paper.
3. manufacture method according to claim 1, it is characterised in that the starch cross-linking agent includes phosphorus oxychloride, six inclined
One or more in sodium phosphate, boric acid, adipic acid, Borax, epoxychloropropane.
4. manufacture method according to claim 1, it is characterised in that the hydroxyl small-molecule substance include glycerol,
One or more in glucose, ethylene glycol, xylitol, Sorbitol.
5. manufacture method according to claim 1, it is characterised in that the pH value of the alkaline coating fluid is 9.0～10.0.
6. manufacture method according to claim 1, it is characterised in that the solid content of the alkaline coating fluid is 55%～
70%.
7. manufacture method according to claim 1, it is characterised in that it is described using the glue application solution in the body paper
In the step of at least one side carries out applying glue, one side resin added is 1.6g/m2～1.8g/m2, which represents that per square metre of body paper makes
Applying glue is carried out with the glue application solution that oven-dry weight is 1.6g～1.8g.
8. manufacture method according to claim 1, it is characterised in that it is described using alkaline coating fluid to described in after applying glue
In the step of at least one side in body paper is coated, single spreading amount is 17g/m2～23g/m2, which represents per square metre of institute
State described alkaline coating fluid of the body paper using oven-dry weight for 17g～23g to be coated.
9. a kind of coating paper, it is characterised in that coating paper manufacture method by any one of claim 1-8 is obtained.
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| CN201510324215.3A CN104963240B (en) | 2015-06-12 | 2015-06-12 | Coated paper and making method thereof |
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| CN201510324215.3A CN104963240B (en) | 2015-06-12 | 2015-06-12 | Coated paper and making method thereof |
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| CN104963240B true CN104963240B (en) | 2017-03-22 |
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| JP4352772B2 (en) * | 2003-06-16 | 2009-10-28 | 富士ゼロックス株式会社 | Recording paper, method for manufacturing the recording paper, and recording method using the same |
| ES2359072T3 (en) * | 2004-11-29 | 2011-05-18 | Basf Se | PAPER WINDING AGENT. |
| ES2585556T3 (en) * | 2011-03-31 | 2016-10-06 | Solenis Technologies Cayman, L.P. | Gluing compositions |
| CN103059770B (en) * | 2011-10-21 | 2016-06-22 | 金东纸业（江苏）股份有限公司 | Starch adhesive, its preparation method and application |
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