CN113652184A - Glue for drying-free paper tube, preparation method of glue and drying-free paper tube - Google Patents
Glue for drying-free paper tube, preparation method of glue and drying-free paper tube Download PDFInfo
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- CN113652184A CN113652184A CN202110879644.2A CN202110879644A CN113652184A CN 113652184 A CN113652184 A CN 113652184A CN 202110879644 A CN202110879644 A CN 202110879644A CN 113652184 A CN113652184 A CN 113652184A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J131/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Adhesives based on derivatives of such polymers
- C09J131/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C09J131/04—Homopolymers or copolymers of vinyl acetate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F218/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid or of a haloformic acid
- C08F218/02—Esters of monocarboxylic acids
- C08F218/04—Vinyl esters
- C08F218/08—Vinyl acetate
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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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
- D21H19/10—Coatings without pigments
- D21H19/12—Coatings without pigments applied as a solution using water as the only solvent, e.g. in the presence of acid or alkaline compounds
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Abstract
The invention provides glue for a drying-free paper tube, a preparation method of the glue and the drying-free paper tube, and belongs to the technical field of papermaking. The glue for the paper tube free of drying comprises the following components in parts by weight: 50-60 parts of deionized water, 3-7 parts of polyvinyl alcohol, 0.1-0.3 part of external cross-linking agent, 0.3-0.4 part of pH regulator, 0.1-0.15 part of initiator, 30-40 parts of vinyl acetate, 2-4 parts of vinyl versatate, 0.3-0.45 part of internal cross-linking agent, 5-10 parts of filler and 0.45-2.3 parts of auxiliary agent. The glue provided by the invention has the characteristics of good fluidity, high adhesion strength, high and low temperature resistance, excellent waterproof performance, high initial adhesion speed and the like, and can be coated on a paper tube made of paper tube base paper, so that the drying step can be omitted, and full-automatic production can be realized.
Description
Technical Field
The invention relates to the technical field of papermaking, in particular to glue for a drying-free paper tube, a preparation method of the glue and the drying-free paper tube coated with the glue.
Background
The traditional industrial paper tube production usually needs the processes of raw paper slitting, tube coiling, drying, fine cutting, packaging and the like. After the paper tube is discharged from the tube coiling machine, the paper tube needs to be manually moved into a drying room by means of a movable carrier for drying, and after the drying is finished, the paper tube still needs to be moved to a post-processing area by means of the carrier for fine cutting and packaging. After the paper tube is taken off the machine, the paper tube is still required to be stood on site for a period of time to solidify the glue, and then the paper tube can be pushed into a drying room to be dried. In the whole production process, the production waste phenomenon which does not conform to lean management exists, namely firstly, the process of stock overstock, paper tube standing and waiting for drying causes the waste of time and space resources; the excessive processing-redundant drying process increases the construction cost of the drying room, the drying room also needs a large amount of occupied area and energy consumption, and dead corners and uneven quality of the drying room are easy to cause quality problems due to uneven moisture of the paper tube; consumption in the aspects of time, manpower, resources and the like is increased in the process of redundant carrying-paper tube entering and exiting the drying room; redundant movement-inter-process transportation causes unnecessary actions in the work of personnel. The waste of manpower, material resources, time, land occupation, energy and the like causes low production efficiency and turnover efficiency, and is not beneficial to realizing automatic production.
Disclosure of Invention
In view of the above, in order to solve the defects and drawbacks of the background art, an object of the present invention is to provide a glue for a paper tube without drying, which has the characteristics of good fluidity, high adhesion strength, high and low temperature resistance, excellent waterproof performance, and fast initial adhesion.
In order to achieve the purpose, the invention provides the following technical scheme:
the glue for the drying-free paper tube comprises the following components in parts by weight: 50-60 parts of deionized water, 3-7 parts of polyvinyl alcohol, 0.1-0.3 part of external cross-linking agent, 0.3-0.4 part of pH regulator, 0.1-0.15 part of initiator, 30-40 parts of vinyl acetate, 2-4 parts of vinyl versatate, 0.3-0.45 part of internal cross-linking agent, 5-10 parts of filler and 0.45-2.3 parts of auxiliary agent.
Preferably, the paint comprises the following components in parts by weight: 50 parts of deionized water, 5 parts of polyvinyl alcohol, 0.3 part of external cross-linking agent, 0.3 part of pH regulator, 0.15 part of initiator, 40 parts of vinyl acetate, 2 parts of vinyl versatate, 0.3 part of internal cross-linking agent, 8 parts of filler and 0.5 part of auxiliary agent.
Preferably, the external cross-linking agent is one or two of boric acid, borax and metal salt; the initiator is one of ammonium persulfate, potassium persulfate and hydrogen peroxide; the internal crosslinking agent is at least one of acrylic acid and functional monomers.
Preferably, the pH adjusting agent is disodium hydrogen phosphate or sodium bicarbonate.
Preferably, the functional monomer is a functional monomer containing hydroxyl or amide.
Preferably, the filler is at least one of calcium carbonate, kaolin, bentonite and silica.
Preferably, the auxiliary agent comprises 0.3-2 parts of plasticizer, 0.05-0.1 part of defoaming agent and 0.1-0.2 part of preservative.
The invention also aims to provide a preparation method of the glue for the drying-free paper tube, which comprises the following steps:
step one, weighing deionized water, polyvinyl alcohol and an external cross-linking agent, stirring and heating for dissolving under the water bath condition to obtain a mixed solution I;
step two, after the mixed solution I is cooled, adding a pH regulator and a dissolved initiator to obtain a mixed solution II;
step three, weighing vinyl acetate, vinyl versatate and an internal crosslinking agent, and dropwise adding the vinyl acetate, the vinyl versatate and the internal crosslinking agent into the mixed solution II to obtain a mixed solution III;
step four, dropping an initiator into the mixed solution III;
step five, adding filler, heating and curing;
and step six, cooling after the step five is finished, and adding an auxiliary agent.
The invention also aims to provide a drying-free paper tube, which consists of paper tube base paper, wherein the paper tube base paper is coated with the glue for the drying-free paper tube, and the single-layer glue coating amount of the paper tube base paper is 3-5%.
Preferably, the sizing ratio of the rosin size of the surface layer, the lining layer and the bottom layer of the paper tube base paper is 1:4:1 in parts by weight; the paper tube base paper comprises the following components in percentage by weight, wherein the coating proportion of a surface layer, a lining layer and a bottom layer of the paper tube base paper is (15-20%): (20% -30%).
Compared with the prior art, the invention has the following beneficial effects:
1. the glue for the drying-free paper tube has the characteristics of good fluidity, high bonding strength, high and low temperature resistance, excellent waterproof performance, high initial adhesion speed and the like.
2. The glue for the drying-free paper tube is based on the principle that polyvinyl alcohol is used as a protective colloid, vinyl acetate and vinyl versatate are subjected to auto-polymerization and copolymerization, and are modified through an internal crosslinking agent and a functional monomer to form a net structure, so that the bonding strength and the moisture resistance are improved. The molecular weight of the emulsion is further increased by combining the external cross-linking agent with hydroxyl, and the drying speed, initial viscosity and water resistance of the emulsion are improved. In addition, the active group of the acrylate modifies the surface of the filler, so that the polarity of the surface of the filler and the compatibility of the surface of the filler with the emulsion are improved.
3. The raw paper used by the drying-free paper tube provided by the invention has different characteristics inside and outside glue absorption performance, namely the outer layer of the raw paper of a single paper tube has certain water seepage performance, and the inner layer has stronger water seepage resistance, so that in the process of gluing and rolling, glue is mainly absorbed by the outer layer of the raw paper to play a role in bonding and cannot permeate into the interior of the raw paper, and the raw paper is tested by a Bob experiment method, and has the water absorption performance of 80 +/-30 g/square meter so as to ensure that the moisture of the rolled paper tube is 7-12 percent, ensure that the production can be fully automatic, cut and packaged, has high production efficiency, avoids drying steps, realizes full-automatic production, saves the building area and energy consumption of a drying room, accelerates turnover efficiency, and meets the requirements of downstream customers of the paper tube and the industrial standard.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described clearly and completely in the following description with reference to specific embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention.
The invention provides glue for a drying-free paper tube, which comprises the following components in parts by weight: 50-60 parts of deionized water, 3-7 parts of polyvinyl alcohol, 0.1-0.3 part of external cross-linking agent, 0.3-0.4 part of pH regulator, 0.1-0.15 part of initiator, 30-40 parts of vinyl acetate, 2-4 parts of vinyl versatate, 0.3-0.45 part of internal cross-linking agent, 5-10 parts of filler and 0.45-2.3 parts of auxiliary agent.
In the invention, the vinyl versatate is a monomer, and the steric hindrance and shielding effect generated by alkyl substituent groups ensure that the copolymer emulsion has special performance.
In the present invention, the polyvinyl alcohol is selected from one or more of BF-05, BF-17, BP-24 and BP-05 of vinpocetine chemical.
In the invention, the paint comprises the following components in parts by weight: 50 parts of deionized water, 5 parts of polyvinyl alcohol, 0.3 part of external cross-linking agent, 0.3 part of pH regulator, 0.15 part of initiator, 40 parts of vinyl acetate, 2 parts of vinyl versatate, 0.3 part of internal cross-linking agent, 8 parts of filler and 0.5 part of auxiliary agent.
In the invention, the external cross-linking agent is one or two of boric acid, borax and metal salt; the initiator is one of ammonium persulfate, potassium persulfate and hydrogen peroxide; the internal crosslinking agent is at least one of acrylic acid and functional monomers, and acrylic acid molecules contain carboxyl and C ═ C double bonds.
In the present invention, the pH adjuster is disodium hydrogen phosphate or sodium bicarbonate.
In the invention, the functional monomer is a functional monomer containing hydroxyl or amide, preferably one or two of hydroxyethyl modified acrylamide, hydroxymethyl acrylamide and hydroxyethyl acrylate.
In the present invention, the filler is at least one of calcium carbonate, kaolin, bentonite and silica.
In the invention, the auxiliary agent comprises 0.3-2 parts of plasticizer, 0.05-0.1 part of defoaming agent and 0.1-0.2 part of preservative.
The invention also aims to provide a preparation method of the glue for the drying-free paper tube, which comprises the following steps:
adding a certain amount of polyvinyl alcohol, a pH regulator and a catalyst into a four-necked flask with an electric stirring and constant-pressure funnel, mixing and dissolving, then adding vinyl acetate, an internal crosslinking agent and the catalyst to carry out copolymerization reaction, and controlling the reaction temperature by water bath. And after the polymerization reaction is finished, adding an external cross-linking agent for cross-linking reaction. Finally, adding the filler, the plasticizer and the like, stirring for 1 hour, and cooling.
The specific process is as follows:
step one, weighing deionized water, polyvinyl alcohol and an external cross-linking agent, adding the deionized water, the polyvinyl alcohol and the external cross-linking agent into a four-neck flask, and stirring and dissolving the mixture for 1 to 2 hours at the temperature of 90 ℃ in a water bath;
step two, when the dissolution is complete, the temperature of the water bath is reduced to 75-80 ℃, a pH regulator is added, an initiator is dissolved in water, and the mixture is added into a flask and stirred uniformly;
weighing vinyl acetate monomer, vinyl versatate and internal crosslinking agent, adding a constant pressure funnel, connecting the funnel to a four-neck flask, dropwise adding the mixed monomer at 75-80 ℃, completing dropwise adding for 4h, and controlling the dropwise adding speed to be stable;
dissolving the initiator in water, adding another constant-pressure funnel, connecting the funnel with the four necks of the flask, dropwise adding the initiator, finishing dropwise adding within 4 hours, and controlling the dropwise adding speed to be stable;
step five, adding a filler, heating to 90 ℃, and curing for 1 h;
and step six, cooling the water bath to below 50 ℃, adding the auxiliary agent, and stirring for 20-30 min.
The present invention will be described in detail with reference to specific examples.
Example 1
Step one, weighing 50 parts of deionized water, 5 parts of polyvinyl alcohol and 0.3 part of boric acid, adding into a four-neck flask, and stirring and dissolving for 1.5 hours under the condition of water bath at 90 ℃;
step two, after the dissolution is complete, reducing the temperature of the water bath to 78 ℃, adding 0.3 part of disodium hydrogen phosphate and 0.1 part of ammonium persulfate dissolved in water, adding the mixture into a flask, and uniformly stirring;
step three, weighing 40 parts of vinyl acetate, 2 parts of ethylene versatate, 0.3 part of acrylic acid and 0.1 part of hydroxyethyl modified acrylamide, adding the materials into a constant-pressure funnel, connecting the funnel to a four-neck flask, dropwise adding a mixed monomer at 78 ℃, completing dropwise adding within 4 hours, and controlling the dropwise adding rate to be stable;
dissolving ammonium persulfate in water, adding another constant-pressure funnel, connecting the funnel with four mouths of flask, dripping 0.05 part of catalyst ammonium persulfate, finishing the dripping within 4h, and controlling the dripping speed to be stable;
and step five, adding 4 parts of kaolin and 4 parts of bentonite, heating to 90 ℃, and curing for 1 hour.
And step six, cooling the water bath to below 50 ℃, adding 0.3 part of plasticizer, 0.1 part of defoamer and 0.1 part of preservative, and stirring for 25 min.
Example 2
The process is the same as in example 1, except that 55 parts of deionized water, 3 parts of polyvinyl alcohol, 0.2 part of borax, 0.35 part of sodium bicarbonate, 0.07 part of ammonium persulfate dropwise added in the second step, 0.04 part of ammonium persulfate dropwise added in the third step, 30 parts of vinyl acetate, 4 parts of vinyl versatate, 0.25 part of acrylic acid, 4 parts of bentonite, 4 parts of kaolin, 1.2 parts of a plasticizer, 0.05 part of a defoaming agent, and 0.2 part of a preservative are added. Stirring and dissolving for 2h in the first step, reducing the temperature of a water bath kettle to 80 ℃ in the second step, dropwise adding 0.05 part of hydroxymethyl acrylamide and 0.03 part of hydroxyethyl acrylate at 80 ℃ in the third step, and stirring for 30min in the sixth step.
Example 3
The process is the same as in example 1, except that 60 parts of deionized water, 7 parts of polyvinyl alcohol, 0.2 part of aluminum sulfate, 0.3 part of disodium hydrogen phosphate, 0.05 part of hydrogen peroxide dropwise added in the second step, 0.05 part of potassium persulfate dropwise added in the third step, 33 parts of vinyl acetate, 3 parts of vinyl versatate, 0.25 part of acrylic acid, 2 parts of silica, 4 parts of calcium carbonate, 2 parts of kaolin, 2 parts of plasticizer, 0.08 part of defoaming agent and 0.15 part of preservative are added. Stirring and dissolving for 1.5h in the first step, reducing the temperature of the water bath kettle to 75 ℃ in the second step, dropwise adding 0.07 part of hydroxyethyl modified acrylamide and 0.03 part of hydroxyethyl acrylate at 75 ℃ in the third step, and stirring for 20min in the sixth step.
Example 4
The process is the same as in example 1, except that 52 parts of deionized water, 5 parts of polyvinyl alcohol, 0.3 part of aluminum sulfate, 0.35 part of disodium hydrogen phosphate, 0.05 part of hydrogen peroxide dropwise added in the second step, 0.05 part of potassium persulfate dropwise added in the third step, 30 parts of vinyl acetate, 3 parts of vinyl versatate, 0.3 part of acrylic acid, 2 parts of silica, 3 parts of calcium carbonate, 3 parts of kaolin, 1.5 parts of plasticizer, 0.05 part of defoaming agent and 0.1 part of preservative are added. Stirring and dissolving for 2h in the first step, reducing the temperature of a water bath kettle to 75 ℃ in the second step, dropwise adding 0.07 part of hydroxyethyl modified acrylamide and 0.03 part of hydroxyethyl acrylate at 75 ℃ in the third step, and stirring for 30min in the sixth step.
Example 5
The process is the same as in example 1 except that 55 parts of deionized water, 3 parts of polyvinyl alcohol, 0.2 part of boric acid, 0.05 part of borax, 0.3 part of sodium bicarbonate, 0.07 part of ammonium persulfate dropwise added in the second step, 0.04 part of ammonium persulfate dropwise added in the third step, 32 parts of vinyl acetate, 4 parts of vinyl versatate, 0.25 part of acrylic acid, 5 parts of bentonite, 3 parts of kaolin, 1.2 parts of a plasticizer, 0.05 part of a defoaming agent, and 0.2 part of a preservative are added. Stirring and dissolving for 1h in the first step, cooling the temperature of a water bath kettle to 80 ℃ in the second step, dropwise adding 0.05 part of hydroxymethyl acrylamide and 0.05 part of hydroxyethyl acrylate at 75 ℃ in the third step, and stirring for 30min in the sixth step.
Example 6
The process is the same as in example 1, except that 55 parts of deionized water, 6 parts of polyvinyl alcohol, 0.1 part of boric acid, 0.1 part of aluminum sulfate, 0.3 part of disodium hydrogen phosphate, 0.05 part of hydrogen peroxide dropwise added in the second step, 0.05 part of potassium persulfate dropwise added in the third step, 30 parts of vinyl acetate, 3 parts of vinyl versatate, 0.3 part of acrylic acid, 5 parts of silica, 3 parts of kaolin, 2 parts of a plasticizer, 0.06 part of an antifoaming agent, and 0.15 part of a preservative. Stirring and dissolving for 1.5h in the first step, reducing the temperature of a water bath kettle to 75 ℃ in the second step, dropwise adding 0.04 part of hydroxyethyl modified acrylamide and 0.04 part of hydroxyethyl acrylate at 75 ℃ in the third step, and stirring for 30min in the sixth step.
Comparative example 1
Comparative example 1 the white latex index for the conventional paper tube was 20-30% of solid content, pH4-6, viscosity 1000-2500cps, initial tack time of 40-60s, and subsequent strength of 10-15N/cm2。
The glue prepared in examples 1-6 was tested according to GB/T2794-1995; the detection of the solid content is according to GB/T2793-1995; detection of pH is according to GB/T14518-1993; then the detection of the intensity is based on GB/T34444-. The results are given in the following table:
TABLE 1 test results of examples 1 to 6
As can be seen from the contents of Table 1, the glue prepared in the examples 1-6 of the present invention has a solid content of 40-45%, a pH of 3.5-5.5, a viscosity of 600-1200cps, an initial adhesion time of 10-20s, and a subsequent strength of 15-20N/cm2. Compared with the conventional white latex used for the traditional paper tube, the glue prepared by the invention has the characteristics of good fluidity, high bonding strength, high initial bonding speed and the like.
The invention also aims to provide a drying-free paper tube, which consists of paper tube base paper, wherein the paper tube base paper is coated with the glue for the drying-free paper tube, and the single-layer glue coating amount of the paper tube base paper is 3-5%.
In the invention, the moisture of the paper tube base paper is 4.5-6%, the moisture is too low, and the paper is easy to break due to poor toughness; the moisture of the base paper is too high, and the moisture of the formed tube is larger.
According to the invention, the glue applying ratio of the rosin size of the surface layer, the lining layer and the bottom layer of the paper tube base paper is 1:4:1 in parts by weight; the paper tube base paper comprises the following components in percentage by weight, wherein the coating proportion of a surface layer, a lining layer and a bottom layer of the paper tube base paper is (15-20%): (20% -30%).
The sizing proportion of the rosin size of the surface layer, the lining layer and the bottom layer of the paper tube base paper is 1:4:1, and the sizing proportion is (15-20%): (20% -30%) and using Cobb test method to test the water absorption performance of paper tube base paper, the specific results are shown in the following table 2:
table 2 Water absorption Properties (g/m) of paper tube base papers were measured in terms of the sizing ratio and sizing ratio of rosin size as follows2)
| DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION | Rosin size ratio | Coating proportion | Water absorption performance |
| Example 7 | 1:4：1 | 15％:55％：30％ | 70/94 |
| Example 8 | 1:4：1 | 18％:52％：30％ | 74/92 |
| Example 9 | 1:4：1 | 20％:50％：30％ | 81/92 |
| Example 10 | 1:4：1 | 15％:60％：25％ | 71/89 |
| Example 11 | 1:4：1 | 18％:60％：22％ | 77/86 |
| Example 12 | 1:4：1 | 20％:60％：20％ | 81/82 |
The water absorption properties in table 2 above are water absorption properties of both front and back sides of the base paper, and are, for example: 70/94 wherein 70 denotes the water absorption value of the obverse or reverse side and 94 denotes the water absorption value of the reverse or obverse side, wherein obverse and reverse sides are used for descriptive purposes only and there is no requirement for specific registration or reverse side.
Comparative example 2
The difference from example 7 is that the rosin size ratio is the conventional 1:1:1 ratio. Meanwhile, the conventional coating proportion is (20-30%): (30% -40%).
The basis weight of the selected conventional base paper is 450g/m2The glue applying ratio is 1:1:1, the water absorption performance is that the inside and the outside uniformly absorb water, and the surface substrate slurry coating ratio is 25%: 35%: 40% of raw paper moisture of 7.0%, and water absorption detectionPerformance result 300/310g/m2。
As can be seen from the content in Table 2, the raw paper of the drying-free paper tube prepared by the invention has the water absorption performance of 80 +/-30 g/square meter which is far lower than that of the conventional raw paper used for rolling the conventional paper tube by 300 +/-50 g/m2And also much lower than the water absorption performance of the paper tube base paper of comparative example 2.
The reel pipe test was carried out using conventional base paper with conventional white latex and example 1, respectively, and the specific results are shown in table 3 below:
table 3: 76.2 x 8 gauge paper tubes (conventional base paper with conventional white latex glue and tube winding test results from example 1, respectively):
the coating weight of the glue in table 3 is the minimum glue coating weight to ensure adhesion. As can be seen from the data in Table 3, the conventional base paper has high water absorption performance and high glue absorption amount, the compressive strength of the paper tube before and after drying is greatly changed, and the indexes of the size such as the inner diameter, the outer diameter, the length and the like are greatly changed, so that the paper tube cannot meet the requirements of customers or industries without drying.
Compared with the common paper tube base paper used for the reelpipe, the paper tube base paper used for the paper tube without drying has the characteristics that the inside and the outside of the glue absorbing performance are different, namely the outer layer of single paper tube base paper has certain water seepage performance, and the inner layer has stronger water seepage resistance, so that glue is mainly absorbed by the outer layer of the base paper to play a role in bonding and cannot permeate into the inside of the base paper in the gluing and rolling process, the final water absorbing performance reaches 80 +/-30 g/square meter, the moisture of the rolled paper tube is ensured to be 7-12 percent, and the paper tube base paper meets the downstream customer requirements and the industrial standard of the paper tube.
Meanwhile, the glue prepared in the above examples 1 to 6 was coated on a single layer of the paper tube base paper of examples 7 to 12 to prepare a drying-free paper tube, which was then taken off the machine for tracking and the performance of the drying-free paper tube was measured. It can be seen from the data that the paper tube discharging machine does not need drying, the moisture content reaches the requirements of customers or industries, and the paper tube has stable size and compression resistance.
Table 4: 76.2X 8 specification paper tube reel pipe experiment result
In table 4, the moisture content (moisture) of the paper tube without drying is measured by a conventional drying method in the art, and details are not repeated herein.
The invention also provides a preparation process of the paper tube base paper and a tube coiling process flow (preparation of the drying-free paper tube):
the preparation process of the paper tube base paper comprises the following steps:
the domestic waste COCC12# B and the domestic waste COCC2# are put into a pulper according to a certain proportion, impurities in the pulp are removed through the processes of pulp breaking, slag removal, screening and the like, then the pulp is concentrated and ground into pulp, so that the cleanliness and the beating degree of the pulp reach the standby requirements, and the pulp is pumped into an adjusting tank.
Adding a cationic sizing agent (rosin size) into an adjusting tank according to the addition amount of 3kg of paper per ton, adding aluminum sulfate into the adjusting tank according to the addition amount of 6kg of paper per ton, and normally starting a slurry tank stirrer to uniformly mix the rosin size and the slurry.
In the approach flow link before the pulp enters the paper machine, aluminum sulfate is added at the inlet of a three-layer fan pump, the addition amount of aluminum sulfate per ton of paper is 6kg, a cationic sizing agent (rosin size) is added at the inlet of a liner pulp fan pump, the addition amount of per ton of paper is 9kg, and the aluminum sulfate, the rosin size and the cationic sizing agent are mixed and then introduced into the paper machine through the fan pump.
Before the slurry enters the forming process, other chemical auxiliary materials are added in a matching way according to the needs so as to improve various performances of the formed paper.
In the net part of the paper machine, the hanging proportion of the three-layer pulp is adjusted to be (15-20%): (20% -30%). The pulp is processed by the procedures of forming, squeezing, drying, reeling, rewinding and the like to prepare the raw paper special for the drying-free paper tube.
Pipe coiling process: the paper tube base paper slitting machine is used for slitting, the paper slitting machine is sequentially placed on a paper frame according to the paper distribution grade and the width, the paper slitting keeps certain tension (0.3-0.4MPa) through a tension plate, single-side gluing is carried out through a glue frame, the gluing amount is adjusted through the angle of a scraper, the paper slitting is spirally wound on a tube winding mandrel, the belt tension forms power, and finally the paper slitting machine is wound into a tube. The speed of the pipe coiling is more than or equal to 15 m/min. The speed of the pipe coiling vehicle is lower than 15m/min, and the drying-free glue can be adhered too fast to cause the drying of the glue film without viscosity.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The glue for the drying-free paper tube is characterized by comprising the following components in parts by weight: 50-60 parts of deionized water, 3-7 parts of polyvinyl alcohol, 0.1-0.3 part of external cross-linking agent, 0.3-0.4 part of pH regulator, 0.1-0.15 part of initiator, 30-40 parts of vinyl acetate, 2-4 parts of vinyl versatate, 0.3-0.45 part of internal cross-linking agent, 5-10 parts of filler and 0.45-2.3 parts of auxiliary agent.
2. The glue for the oven-drying-free paper tube as claimed in claim 1, characterized by comprising, in parts by weight: 50 parts of deionized water, 5 parts of polyvinyl alcohol, 0.3 part of external cross-linking agent, 0.3 part of pH regulator, 0.15 part of initiator, 40 parts of vinyl acetate, 2 parts of vinyl versatate, 0.3 part of internal cross-linking agent, 8 parts of filler and 0.5 part of auxiliary agent.
3. The glue for the oven-free paper tube as claimed in claim 1, wherein the external cross-linking agent is one or two of boric acid, borax and metal salt; the initiator is one of ammonium persulfate, potassium persulfate and hydrogen peroxide; the internal crosslinking agent is at least one of acrylic acid and functional monomers.
4. The glue for the oven-free paper tube as claimed in claim 1, wherein the pH regulator is disodium hydrogen phosphate or sodium bicarbonate.
5. The glue for the oven-drying-free paper tube as claimed in claim 3, wherein the functional monomer is a functional monomer containing hydroxyl or amide.
6. The glue for the oven-free paper tube as claimed in claim 1, wherein the filler is at least one of calcium carbonate, kaolin, bentonite and silica.
7. The glue for the oven-free paper tube as claimed in claim 1, wherein the auxiliary agent comprises 0.3-2 parts of plasticizer, 0.05-0.1 part of defoamer and 0.1-0.2 part of preservative.
8. A preparation method of the glue for the paper tube without drying as claimed in any one of claims 1-7,
the method comprises the following steps:
step one, weighing deionized water, polyvinyl alcohol and an external cross-linking agent, stirring and heating for dissolving under the water bath condition to obtain a mixed solution I;
step two, after the mixed solution I is cooled, adding a pH regulator and a dissolved initiator to obtain a mixed solution II;
step three, weighing vinyl acetate, vinyl versatate and an internal crosslinking agent, and dropwise adding the vinyl acetate, the vinyl versatate and the internal crosslinking agent into the mixed solution II to obtain a mixed solution III;
step four, dropping an initiator into the mixed solution III;
step five, adding filler, heating and curing;
and step six, cooling after the step five is finished, and adding an auxiliary agent.
9. The drying-free paper tube is characterized by comprising paper tube base paper, wherein the paper tube base paper is coated with the glue for the drying-free paper tube, which is disclosed by claims 1-7, and the single-layer glue coating amount of the paper tube base paper is 3% -5%.
10. The drying-free paper tube as claimed in claim 9, wherein the sizing ratio of the rosin size of the surface layer, the lining layer and the bottom layer of the paper tube base paper is 1:4: 1; the paper tube base paper comprises the following components in percentage by weight, wherein the coating proportion of a surface layer, a lining layer and a bottom layer of the paper tube base paper is (15-20%): (20% -30%).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110879644.2A CN113652184A (en) | 2021-08-02 | 2021-08-02 | Glue for drying-free paper tube, preparation method of glue and drying-free paper tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110879644.2A CN113652184A (en) | 2021-08-02 | 2021-08-02 | Glue for drying-free paper tube, preparation method of glue and drying-free paper tube |
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| Publication Number | Publication Date |
|---|---|
| CN113652184A true CN113652184A (en) | 2021-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110879644.2A Withdrawn CN113652184A (en) | 2021-08-02 | 2021-08-02 | Glue for drying-free paper tube, preparation method of glue and drying-free paper tube |
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| CN (1) | CN113652184A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115851181A (en) * | 2022-11-30 | 2023-03-28 | 汇胜包装科技有限公司 | Pagoda paper tube adhesive for yarn steaming and preparation method thereof |
-
2021
- 2021-08-02 CN CN202110879644.2A patent/CN113652184A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115851181A (en) * | 2022-11-30 | 2023-03-28 | 汇胜包装科技有限公司 | Pagoda paper tube adhesive for yarn steaming and preparation method thereof |
| CN115851181B (en) * | 2022-11-30 | 2024-04-02 | 汇胜包装科技有限公司 | Pagoda paper tube adhesive for steaming yarns and preparation method thereof |
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