CN111041889B - Glue solution for paper surface treatment, paper treatment method, obtained paper and application thereof - Google Patents
Glue solution for paper surface treatment, paper treatment method, obtained paper and application thereof Download PDFInfo
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- CN111041889B CN111041889B CN201911279715.4A CN201911279715A CN111041889B CN 111041889 B CN111041889 B CN 111041889B CN 201911279715 A CN201911279715 A CN 201911279715A CN 111041889 B CN111041889 B CN 111041889B
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
-
- 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
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/62—Macromolecular organic compounds or oligomers thereof obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
-
- 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
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/32—Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper
-
- 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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paper (AREA)
Abstract
The invention provides a glue solution for paper surface treatment, a paper treatment method, obtained paper and application thereof, wherein the glue solution comprises the following components in percentage by weight of 100 percent: 5% -35% of aqueous polyurethane glue solution; 0.2 to 1.5 percent of cross-linking agent; 0.3 to 3 percent of silica sol; 0-0.1% of organic silicon defoaming agent; 0.01 to 0.1 percent of pH regulator; the balance of water. The invention also provides a paper treatment method, which is to use the glue solution for paper surface treatment to carry out surface sizing treatment on paper. The invention also provides paper manufactured by the paper processing method. The paper prepared by the invention has excellent water resistance, high folding resistance and high dirt resistance, and has good combination property with ink (namely the paper has good ink absorption property and printability and excellent paper-ink combination property).
Description
Technical Field
The invention relates to glue solution for paper surface treatment, a paper treatment method, obtained paper and application thereof, and belongs to the technical field of special paper preparation.
Background
At present, the chemical additives applied to surface sizing in the papermaking industry are various and can be roughly divided into two types: natural macromolecules and synthetic polymers. Wherein, the natural polymer products mainly comprise starch, cellulose, hemicellulose, shellac, gelatin, chitin, sodium alginate and the like; the synthetic polymer auxiliary agents mainly comprise products such As Ketene Dimer (AKD), paraffin, polyvinyl alcohol (PVA), Polyacrylamide (PAM), silicone polymer, polyurethane polymer and the like. As a surface sizing agent, starch and modified substances thereof are mostly used in the civil paper industry, according to the needs of reinforcing, improving water resistance and printing performance, other surface sizing agents and medicines such as higher-price animal glue, CMC (sodium carboxymethylcellulose), polyacrylamide polymer and the like are sometimes added, and a small amount of emulsion type functional auxiliary agents are also added to some high-grade civil products.
Due to the special characteristics of gravure printing and the special requirement of circulation resistance, the requirement on the used surface sizing agent is high, and the required surface sizing agent not only needs to meet the requirements of high mechanical strength and surface strength of paper, but also needs to meet the requirements of high circulation resistance and good paper and ink binding performance of paper. At present, PVA (polyvinyl alcohol) is generally used as a main sizing agent for domestic and foreign security paper, but because a polyvinyl alcohol surface sizing agent has poor water resistance and large polarity, a water repellent agent is generally required to be added, and most of the existing water-soluble water repellent agents such as amino resin water repellent agents can not meet the requirements of paper and ink binding performance.
Therefore, providing a glue solution for paper surface treatment, a paper treatment method, the obtained paper and application thereof become technical problems to be solved in the field.
Disclosure of Invention
In order to solve the above disadvantages and shortcomings, an object of the present invention is to provide a glue solution for surface treatment of paper.
The invention also aims to provide a preparation method of the glue solution for the surface treatment of the paper.
Still another object of the present invention is to provide a paper treating method for surface sizing paper using the above-mentioned glue solution for surface treatment of paper.
It is a further object of the present invention to provide a paper sheet produced by the above paper sheet processing method.
It is also an object of the invention to provide the use of the paper as a stock paper for value documents.
In order to achieve the above object, in one aspect, the present invention provides a glue solution for paper surface treatment, wherein the glue solution comprises, based on 100% by total weight of the glue solution for paper surface treatment:
in the above-mentioned glue solution for paper surface treatment, it preferably contains, based on 100% by total weight of the glue solution for paper surface treatment:
in the glue solution for paper surface treatment described above, preferably, the crosslinking agent includes one or a combination of several of isocyanate crosslinking agents, azapyridine and carbodiimide.
In the above-described glue solution for paper surface treatment, preferably, the pH adjuster includes hydrochloric acid or an aqueous sodium hydroxide solution.
In the above-described glue solution for paper surface treatment, the silicone antifoaming agent is a conventional substance in the art, and is commercially available.
The glue solution for paper surface treatment provided by the invention has extremely strong film-forming property, wherein the used aqueous polyurethane glue solution has high mechanical stability and high-temperature stability, and can meet the process requirements of high shearing, extrusion, high temperature and the like in the glue applying and pressing process of valuable paper such as banknote paper and the like.
On the other hand, the invention also provides a preparation method of the glue solution for paper surface treatment, wherein the preparation method comprises the following steps:
uniformly mixing the aqueous polyurethane glue solution with water to obtain a mixture A; adding a pH regulator into the mixture A to regulate the pH value of the mixture A to 6-8, adding silica sol into the mixture A after the pH value is regulated, and uniformly mixing to obtain a mixture B; and adding a cross-linking agent into the mixture B and uniformly mixing to obtain a glue solution for treating the surface of the paper.
In the above-described method for preparing a glue solution for paper surface treatment, preferably, when the glue solution for paper surface treatment contains a silicone defoamer, the method for preparing the glue solution for paper surface treatment comprises the following steps:
uniformly mixing the aqueous polyurethane glue solution and water to obtain a mixture A; adding a pH regulator into the mixture A to regulate the pH value of the mixture A to 6-8, adding silica sol into the mixture A after the pH value is regulated, and uniformly mixing to obtain a mixture B; adding a cross-linking agent into the mixture B and uniformly mixing to obtain a mixture C; and adding the organic silicon defoaming agent into the mixture C and uniformly mixing to obtain the glue solution for treating the paper surface.
In the present invention, the pH of the aqueous polyurethane glue solution may vary for various reasons such as the manufacturer thereof, and therefore, after the aqueous polyurethane glue solution is diluted with water, it is necessary to selectively add an appropriate pH adjusting agent to the diluted solution to adjust and stabilize the pH of the diluted solution to 6 to 8 according to the pH of the diluted solution.
In still another aspect, the present invention also provides a paper sheet treatment method, wherein the paper sheet treatment method performs surface sizing treatment on paper sheets by using the above-mentioned glue solution for paper sheet surface treatment.
In the paper treatment method, preferably, the sizing solution for paper surface treatment is prepared into a sizing solution with a mass concentration of 5-36% (calculated based on the total weight of the obtained sizing solution), and then the sizing solution is used for paper surface sizing treatment.
In the above-mentioned paper sheet treatment method, it is preferable that the amount of the glue solution on the paper sheet surface (the glue solution for paper sheet surface treatment) is controlled to 3 to 15g/m in the surface sizing treatment process2。
Wherein, in the surface sizing treatment process, the amount of the glue solution on the surface of the paper is controlled to be 3-15g/m2The amount of the glue solution for paper surface treatment for controlling the double surfaces of paper is 3-15g/m2。
In still another aspect, the invention further provides paper, wherein the paper is produced by the paper processing method.
Preferably, the above-mentioned paper has a water absorption of 15 to 30g/m2The folding endurance reaches 4000-10000 times.
The paper provided by the invention has high folding endurance, and can meet the requirements of high folding endurance and high flow resistance of valuable paper such as banknote paper and the like.
In a further aspect, the invention also provides the use of the paper described above as a stock paper for securities. The value document may be, for example, a banknote, a check, a money order, etc.
The paper obtained by the invention has excellent water resistance, high folding resistance and high dirt resistance, and has good combination property with ink (namely the paper has good ink absorption property and printability and excellent paper-ink combination property).
Detailed Description
In order to clearly understand the technical features, objects and advantages of the present invention, the following detailed description of the technical solutions of the present invention will be made with reference to the following examples, which should not be construed as limiting the implementable scope of the present invention.
Example 1
The embodiment provides a glue solution for paper surface treatment, wherein the glue solution for paper surface treatment comprises the following components in parts by weight:
the glue solution for paper surface treatment is prepared by a preparation method comprising the following specific steps:
at normal temperature, 667kg of PU (polyurethane) with solid content of 30 percent is added into a glue making pot, 1303kg of water is added, and the mixture is stirred evenly; then adding 1kg of sodium hydroxide aqueous solution with the solid content of 30% to stabilize the pH value of the glue solution between 6 and 8, and then adding 10kg of silica sol with the solid content of 20% to mix evenly; adding 20kg of cross-linking agent isocyanate and stirring uniformly; and finally, adding 1kg of an organic silicon defoaming agent with the solid content of 22% and uniformly stirring to finally obtain the silica sol modified waterborne polyurethane emulsion (namely the glue solution for paper surface treatment), pumping the silica sol modified waterborne polyurethane emulsion into a glue storage tank, and pumping the glue storage tank into a glue applying groove for later use.
Example 2
The embodiment provides a glue solution for paper surface treatment, wherein the glue solution for paper surface treatment comprises the following components in parts by weight:
the glue solution for paper surface treatment is prepared by a preparation method comprising the following specific steps:
at normal temperature, 667kg of PU (polyurethane) with the solid content of 30 percent is added into a glue making pot, 1298kg of water is added, and the mixture is stirred evenly; then adding 1kg of sodium hydroxide aqueous solution with the solid content of 30% to stabilize the pH value of the glue solution between 6 and 8, and then adding 15kg of silica sol with the solid content of 20% to mix evenly; adding 20kg of cross-linking agent isocyanate and stirring uniformly; finally, the silica sol modified waterborne polyurethane emulsion (namely the glue solution for paper surface treatment) is obtained and pumped into a glue storage tank, and then pumped into a glue applying groove for standby use from the glue storage tank.
Example 3
The embodiment provides a glue solution for paper surface treatment, wherein the glue solution for paper surface treatment comprises the following components in parts by weight:
the glue solution for paper surface treatment is prepared by a preparation method comprising the following specific steps:
at normal temperature, 667kg of PU (polyurethane) with the solid content of 30 percent is added into a glue making pot, 1293kg of water is added and the mixture is stirred evenly; then adding 1kg of sodium hydroxide aqueous solution with the solid content of 30% to stabilize the pH value of the glue solution between 6 and 8, and then adding 20kg of silica sol with the solid content of 20% to mix evenly; adding 20kg of cross-linking agent isocyanate and stirring uniformly; finally, the silica sol modified waterborne polyurethane emulsion (namely the glue solution for paper surface treatment) is obtained and pumped into a glue storage tank, and then pumped into a glue applying groove for standby use from the glue storage tank.
Example 4
The embodiment provides a paper surface treatment method, wherein the paper surface treatment method performs surface sizing treatment on paper by using the glue solution for paper surface treatment described in the above embodiment 1, and specifically includes the following steps:
preparing the glue solution for paper surface treatment in example 1 into a sizing solution with a mass concentration of 34.3%, wherein the mass concentration is calculated by taking the total weight of the obtained sizing solution as a reference;
the main component of the fiber substrate for sizing is cotton fiber, the paper is molded and dried and then enters a sizing part, and the sizing solution pair is mainly used in a dipping type sizing modeThe fiber substrate is subjected to sizing treatment, and the sizing amount of the double surfaces of the paper is controlled to be 8g/m in the sizing treatment process2。
Example 5
The embodiment provides a paper surface treatment method, wherein the paper surface treatment method performs surface sizing treatment on paper by using the glue solution for paper surface treatment described in the above embodiment 2, and specifically includes the following steps:
preparing the glue solution for paper surface treatment described in example 2 into a sizing solution with a mass concentration of 34.3%, wherein the mass concentration is calculated by taking the total weight of the obtained sizing solution as a reference;
the main component of the fiber substrate for sizing is cotton fiber, the paper enters a sizing part after being formed and dried, the sizing liquid is mainly used for sizing the fiber substrate in a dipping type sizing mode, and the sizing amount of the double surfaces of the paper is controlled to be 8g/m in the sizing process2。
Example 6
The embodiment provides a paper surface treatment method, wherein the paper surface treatment method performs surface sizing treatment on paper by using the glue solution for paper surface treatment described in the above embodiment 3, and specifically includes the following steps:
preparing the glue solution for paper surface treatment described in example 3 into a sizing solution with a mass concentration of 34.3%, wherein the mass concentration is calculated by taking the total weight of the obtained sizing solution as a reference;
the main component of the fiber substrate for sizing is cotton fiber, the paper enters a sizing part after being formed and dried, the sizing liquid is mainly used for sizing the fiber substrate in a dipping type sizing mode, and the sizing amount of the double surfaces of the paper is controlled to be 8g/m in the sizing process2。
Test example
The paper prepared in example 4 was subjected to a physical index test based on the measurement of the folding endurance of the GB/T457-.
TABLE 1
| Folding endurance (double times) | Water absorption (%) | |
| Paper obtained in example 4 | 4522 | 23 |
As can be seen from table 1, the paper made by the present invention has excellent water resistance, high folding strength, high dirt resistance, and good binding property with ink (i.e. the paper has good ink absorption and printability, and has excellent paper-ink binding property).
The above description is only exemplary of the invention and should not be taken as limiting the scope of the invention, so that the invention is intended to cover all modifications and equivalents of the embodiments described herein. In addition, the technical features and the technical inventions of the present invention, the technical features and the technical inventions, and the technical inventions can be freely combined and used.
Claims (11)
1. The glue solution for paper surface treatment is characterized by comprising the following components in percentage by weight of 100 percent of the total weight of the glue solution for paper surface treatment:
5% -35% of aqueous polyurethane glue solution;
0.2 to 1.5 percent of cross-linking agent;
0.3 to 3 percent of silica sol;
0-0.1% of organic silicon defoaming agent;
0.01 to 0.1 percent of pH regulator;
the balance of water; wherein the cross-linking agent comprises one or a combination of more of isocyanate cross-linking agent, azapyridine and carbodiimide;
the glue solution for paper surface treatment is prepared by a preparation method comprising the following steps:
uniformly mixing the aqueous polyurethane glue solution with water to obtain a mixture A; adding a pH regulator into the mixture A to regulate the pH value of the mixture A to 6-8, adding silica sol into the mixture A after the pH value is regulated, and uniformly mixing to obtain a mixture B; and adding a cross-linking agent into the mixture B and uniformly mixing to obtain a glue solution for treating the surface of the paper.
2. The glue solution for paper surface treatment according to claim 1, comprising, based on 100% by total weight of the glue solution for paper surface treatment:
5% -35% of aqueous polyurethane glue solution;
0.2 to 1.5 percent of cross-linking agent;
0.3 to 3 percent of silica sol;
0.01 to 0.1 percent of organic silicon defoaming agent;
0.01 to 0.1 percent of pH regulator;
the balance of water.
3. The glue solution for paper surface treatment according to claim 1 or 2, characterized in that the pH regulator comprises hydrochloric acid or aqueous sodium hydroxide solution.
4. A process for the preparation of a size for the surface treatment of paper according to any one of claims 1 to 3, characterized in that it comprises the following steps:
uniformly mixing the aqueous polyurethane glue solution with water to obtain a mixture A; adding a pH regulator into the mixture A to regulate the pH value of the mixture A to 6-8, adding silica sol into the mixture A after the pH value is regulated, and uniformly mixing to obtain a mixture B; and adding a cross-linking agent into the mixture B and uniformly mixing to obtain a glue solution for treating the surface of the paper.
5. The method for preparing the glue solution for paper surface treatment according to claim 4, wherein when the glue solution for paper surface treatment contains an organic silicon defoamer, the method comprises the following steps:
uniformly mixing the aqueous polyurethane glue solution with water to obtain a mixture A; adding a pH regulator into the mixture A to regulate the pH value of the mixture A to 6-8, adding silica sol into the mixture A after the pH value is regulated, and uniformly mixing to obtain a mixture B; adding a cross-linking agent into the mixture B and uniformly mixing to obtain a mixture C; and adding the organic silicon defoaming agent into the mixture C and uniformly mixing to obtain the glue solution for treating the paper surface.
6. A paper sheet treatment method characterized in that the paper sheet is surface-sized with the glue solution for paper sheet surface treatment according to any one of claims 1 to 3.
7. The paper processing method of claim 6, wherein the sizing solution for paper surface treatment is prepared into a sizing solution with a mass concentration of 5-36%, and the sizing solution is used for paper surface sizing treatment.
8. A paper treatment process as claimed in claim 7, characterized in that the amount of glue on the paper surface is controlled to be 3-15g/m during the surface sizing treatment2。
9. Paper, characterized in that it is produced by a paper treatment method according to any one of claims 6 to 8.
10. Paper according to claim 9, characterised in that the water absorption of the paper is 15-30g/m2The folding endurance reaches 4000-10000 times.
11. Use of the paper according to claim 9 or 10 as a stock paper for value documents.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911279715.4A CN111041889B (en) | 2019-12-13 | 2019-12-13 | Glue solution for paper surface treatment, paper treatment method, obtained paper and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911279715.4A CN111041889B (en) | 2019-12-13 | 2019-12-13 | Glue solution for paper surface treatment, paper treatment method, obtained paper and application thereof |
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| CN111041889A CN111041889A (en) | 2020-04-21 |
| CN111041889B true CN111041889B (en) | 2022-04-29 |
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| CN112726247B (en) * | 2021-01-05 | 2022-12-23 | 浙江上峰包装新材料有限公司 | Transparent paper for printing and packaging and preparation method thereof |
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| CN101346513A (en) * | 2005-12-21 | 2009-01-14 | 阿克佐诺贝尔股份有限公司 | Sizing of paper |
| CN102807833A (en) * | 2012-08-28 | 2012-12-05 | 东莞市山力高分子材料科研有限公司 | Water-based inorganic silicon-organic silicon-polyurethane adhesive and preparation method thereof |
| CN104562845A (en) * | 2013-10-11 | 2015-04-29 | 金东纸业（江苏）股份有限公司 | Paper surface sizing agent and method for raising paper permeability resistance |
| CN106283869A (en) * | 2016-08-25 | 2017-01-04 | 广东省造纸研究所 | A kind of novel organic/inorganic is combined the preparation of glue system |
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| CN101346513A (en) * | 2005-12-21 | 2009-01-14 | 阿克佐诺贝尔股份有限公司 | Sizing of paper |
| CN102807833A (en) * | 2012-08-28 | 2012-12-05 | 东莞市山力高分子材料科研有限公司 | Water-based inorganic silicon-organic silicon-polyurethane adhesive and preparation method thereof |
| CN104562845A (en) * | 2013-10-11 | 2015-04-29 | 金东纸业（江苏）股份有限公司 | Paper surface sizing agent and method for raising paper permeability resistance |
| CN106283869A (en) * | 2016-08-25 | 2017-01-04 | 广东省造纸研究所 | A kind of novel organic/inorganic is combined the preparation of glue system |
| CN110284373A (en) * | 2019-07-26 | 2019-09-27 | 北京知淘科技有限责任公司 | A kind of preparation method and waterproof flame-retardant type corrugated board of waterproof flame-retardant type corrugated board |
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Address after: No.2166, Shengxing West Road, Baoding City, Hebei Province 071071 Patentee after: BAODING BANKNOTE PAPER Co.,Ltd. Patentee after: China Banknote Printing and Minting Group Co.,Ltd. Address before: No.2166, Shengxing West Road, Baoding City, Hebei Province 071071 Patentee before: BAODING BANKNOTE PAPER Co.,Ltd. Patentee before: CHINA BANKNOTE PRINTING AND MINTING Corp. |
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