CN112458791A - Corrugated paper processing technology for improving easy glue opening of corrugated paper surface sizing agent - Google Patents
Corrugated paper processing technology for improving easy glue opening of corrugated paper surface sizing agent Download PDFInfo
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- CN112458791A CN112458791A CN202011420263.XA CN202011420263A CN112458791A CN 112458791 A CN112458791 A CN 112458791A CN 202011420263 A CN202011420263 A CN 202011420263A CN 112458791 A CN112458791 A CN 112458791A
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- corrugated paper
- grinding
- pulp
- fibers
- sizing agent
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- 238000004513 sizing Methods 0.000 title claims abstract description 55
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 51
- 239000003292 glue Substances 0.000 title claims abstract description 41
- 238000012545 processing Methods 0.000 title claims abstract description 26
- 238000005516 engineering process Methods 0.000 title claims abstract description 24
- 239000000835 fiber Substances 0.000 claims abstract description 76
- 238000000227 grinding Methods 0.000 claims abstract description 55
- 239000002105 nanoparticle Substances 0.000 claims abstract description 46
- FWPIDFUJEMBDLS-UHFFFAOYSA-L tin(II) chloride dihydrate Chemical compound O.O.Cl[Sn]Cl FWPIDFUJEMBDLS-UHFFFAOYSA-L 0.000 claims abstract description 44
- OQQMLOABWOWXKW-UHFFFAOYSA-N C(C1=CC=CC=C1)(=O)OCCCCCCCCCCCC.[Na] Chemical compound C(C1=CC=CC=C1)(=O)OCCCCCCCCCCCC.[Na] OQQMLOABWOWXKW-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000002156 mixing Methods 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 27
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims abstract description 16
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 238000002360 preparation method Methods 0.000 claims abstract description 12
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052700 potassium Inorganic materials 0.000 claims abstract description 11
- 239000011591 potassium Substances 0.000 claims abstract description 11
- 239000001103 potassium chloride Substances 0.000 claims abstract description 8
- 235000011164 potassium chloride Nutrition 0.000 claims abstract description 8
- 238000000137 annealing Methods 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 53
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 36
- 238000001035 drying Methods 0.000 claims description 31
- 239000004570 mortar (masonry) Substances 0.000 claims description 30
- 238000005303 weighing Methods 0.000 claims description 30
- 238000007790 scraping Methods 0.000 claims description 22
- 239000002002 slurry Substances 0.000 claims description 22
- 239000011812 mixed powder Substances 0.000 claims description 21
- 238000010009 beating Methods 0.000 claims description 11
- 239000012279 sodium borohydride Substances 0.000 claims description 11
- 229910000033 sodium borohydride Inorganic materials 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 239000012153 distilled water Substances 0.000 claims description 10
- 239000011259 mixed solution Substances 0.000 claims description 10
- 238000005406 washing Methods 0.000 claims description 10
- 239000000919 ceramic Substances 0.000 claims description 9
- 239000000243 solution Substances 0.000 claims description 9
- QWMFKVNJIYNWII-UHFFFAOYSA-N 5-bromo-2-(2,5-dimethylpyrrol-1-yl)pyridine Chemical compound CC1=CC=C(C)N1C1=CC=C(Br)C=N1 QWMFKVNJIYNWII-UHFFFAOYSA-N 0.000 claims description 7
- 210000000481 breast Anatomy 0.000 claims description 7
- 230000005484 gravity Effects 0.000 claims description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- -1 polytetrafluoroethylene Polymers 0.000 claims description 5
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 230000018044 dehydration Effects 0.000 claims description 2
- 238000006297 dehydration reaction Methods 0.000 claims description 2
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 238000012958 reprocessing Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 27
- 238000012216 screening Methods 0.000 description 27
- 239000002073 nanorod Substances 0.000 description 16
- 238000010521 absorption reaction Methods 0.000 description 15
- ZNOKGRXACCSDPY-UHFFFAOYSA-N tungsten trioxide Chemical compound O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
- 239000002135 nanosheet Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 239000002086 nanomaterial Substances 0.000 description 4
- 229920002472 Starch Polymers 0.000 description 3
- 125000002091 cationic group Chemical group 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000002243 precursor Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 235000019698 starch Nutrition 0.000 description 3
- 239000008107 starch Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 229920001909 styrene-acrylic polymer Polymers 0.000 description 3
- 229910021642 ultra pure water Inorganic materials 0.000 description 3
- 239000012498 ultrapure water Substances 0.000 description 3
- 238000009489 vacuum treatment Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000005022 packaging material Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 239000000411 inducer Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000001338 self-assembly Methods 0.000 description 1
- 238000003746 solid phase reaction Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
- D21H17/675—Oxides, hydroxides or carbonates
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
- D21F11/12—Making corrugated paper or board
-
- 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
- D21H19/385—Oxides, hydroxides or carbonates
-
- 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
Abstract
The invention discloses a corrugated paper processing technology for improving the easy splitting of a corrugated paper surface sizing agent, which relates to the technical field of corrugated paper processing, and comprises the following specific processes: 1) grinding stannous chloride dihydrate and sodium dodecyl benzoate; 2) grinding potassium borohydride and sodium dodecyl benzoate; 3) mixing and grinding the products obtained in the step 1) and the step 2), placing the mixture and potassium chloride in a tube furnace, and annealing to obtain nano particles; 4) separately grinding long fibers, medium fibers and short fibers into pulp, and adding the pulp and nanoparticles into a pulp preparation pool to prepare preliminarily formed corrugated paper; 5) and (5) reprocessing the preliminarily formed corrugated paper to finish the processing technology of the corrugated paper. The corrugated paper processing technology provided by the invention can effectively reduce the glue failure phenomenon of the corrugated paper surface sizing agent, thereby enhancing the comprehensive performance of the corrugated paper.
Description
Technical Field
The invention belongs to the technical field of corrugated paper processing, and particularly relates to a corrugated paper processing technology for improving the easy glue failure of a corrugated paper surface sizing agent.
Background
The carton as a common packaging material is widely applied all over the world for a long time, and along with the development of economy and the gradual improvement of living standard, higher quality requirements are also put forward on the packaging material. It is desirable for the carton to be stronger, maintain high strength particularly in wet environments, and be lighter without changing strength, so that the product can be stored more safely and handled more easily.
Because of the development trend of the carton industry, higher quality requirements are also provided for the base paper, and the corrugated base paper is especially suitable for the customers, and in order to meet the higher requirements of the customers, the majority of paper makers of corrugated paper manufacturers begin to apply the surface sizing technology which is widely applied in civilization to the corrugated paper. The surface sizing of the corrugated paper is to obtain higher ring crush strength and better water and moisture resistance. The ring crush strength value after surface sizing can be greatly improved, generally by 30-50%; if the used waste paper raw material is poor, the ring crush strength can be improved by even 100% after surface sizing, and the effect is difficult to achieve by adding any auxiliary agent into the pulp. After the sizing agent with water resistance and moisture resistance is added into the glue solution, the water resistance and the moisture resistance of the corrugated paper can be greatly improved, and the cost of using the sizing agent in the glue solution is often doubled or even multiplied to achieve the same effect. Consequently, in the manufacturing process of corrugated paper, through carrying out the gluey to the corrugated paper surface, can effectual ring crush strength and the moisture resistance of improvement corrugated paper, however, in prior art, carry out the gluey to the corrugated paper surface, there is the problem of easily opening the glue in process of production, not only is unfavorable for the promotion of corrugated paper moisture resistance, makes the quality of corrugated paper reduce on the contrary.
Disclosure of Invention
The invention aims to provide a corrugated paper processing technology for improving the easy glue failure of a corrugated paper surface sizing agent aiming at the technical defect of easy glue failure of the corrugated paper surface sizing agent in the prior art, so that glue applied on the surface of corrugated paper is not easy to crack, and the comprehensive performance of the corrugated paper is improved.
The invention is realized by the following technical scheme:
a corrugated paper processing technology for improving easy glue opening of a corrugated paper surface sizing agent comprises the following specific technological methods:
1) weighing a proper amount of stannous chloride dihydrate, putting the stannous chloride dihydrate into a mortar, grinding for 20-30min, weighing a proper amount of sodium dodecyl benzoate, putting the sodium dodecyl benzoate into the mortar, grinding for 10-20min, mixing the ground stannous chloride dihydrate and the sodium dodecyl benzoate according to the mass ratio of 3-3.5:5, and then putting the mixture into the mortar, grinding for 10-15min for later use;
2) weighing a proper amount of potassium borohydride, putting the potassium borohydride into a mortar, grinding for 20-30min, weighing a proper amount of sodium dodecyl benzoate, putting the sodium dodecyl benzoate into the mortar, grinding for 10-20min, mixing the ground sodium borohydride and the ground sodium dodecyl benzoate according to the mass ratio of 1.3-1.6:5, and then putting the mixture into the mortar, grinding for 10-15min for later use;
3) mixing and grinding the products obtained in the step 1) and the step 2) for 30-40min according to the mass ratio of stannous chloride dihydrate to sodium borohydride of 2.0-2.3:1, placing the mixture in air for 12-15h, repeatedly washing the obtained mixed powder with ethanol and distilled water respectively, drying the mixed powder, mixing and grinding the dried mixed powder with potassium chloride according to the mass ratio of 1:4-4.3, placing the mixed powder in a tubular furnace, and annealing the mixed powder for 3-4h at the temperature of 850 ℃ to obtain nano particles; according to the invention, a room temperature solid phase reaction method is utilized to synthesize a tin dioxide nanoparticle precursor, a molten salt medium potassium chloride is selected, the precursor is annealed at high temperature, the precursor nanoparticles can grow in a self-assembly manner, the nanoparticles are converted into nanorods, and in the space structure of the nanorods, one long nanorod is presented, the length of the nanorod is increased to a millimeter level, five and six short nanorods are supported, so that the space structure of the nanorods presents an obtuse angle V-shaped nanostructure, namely five and six branched short nanorods are self-grown on one long nanorod, by adding the nanoparticles into slurry, the V-shaped nanostructure presented in the nanoparticles is just like branches and can be wound with fibers in the slurry, and the nanoparticles are taken as a cross-connection point, so that the winding structure of the fibers can be more stable;
4) separately grinding long fibers, medium fibers and short fibers into pulp, adding the pulp and nanoparticles into a pulp preparation pool for mixing, controlling the nanoparticles to account for 3.2-4.6% of the total mass of the pulp, controlling the beating degree of the pulp to be 40-50 DEG SR, obtaining the pulp, conveying the obtained pulp to a net part forming system for dehydration, and then carrying out net part forming, squeezing and drying to obtain preliminarily formed corrugated paper; in the invention, the prepared nanoparticles with special forms are introduced into the corrugated paper, the V-shaped nanostructures presented in the nanoparticles are like branches and can be wound with fibers in the slurry, and the winding structure of the fibers in the corrugated paper is more stable, so that the fiber structure in the corrugated paper is not easy to deform under the high-temperature drying condition, after the surface sizing of the corrugated paper is carried out, the glue layer is not subjected to glue splitting caused by the self-generated deformation of the corrugated paper in the drying and curing process of the corrugated paper, and the nanoparticles introduced into the corrugated paper are wound and attached on the fibers, so that a nanoparticle layer is formed on the surface of the corrugated paper and randomly distributed on the surface of the corrugated paper, numerous randomly distributed nanorod branches are presented on the surface of the corrugated paper, and the formed nanorod branches take the corrugated paper as a matrix and are crossed with each other, the nano particle layer with the hollowed appearance formed by the nano rod branches is constructed on the surface of the corrugated paper, when glue is applied to the surface of the corrugated paper, the nano particle layer with the hollowed appearance can be embedded into the glue layer, and a continuous-phase branch interweaving structure is formed in the glue layer, so that the stress action in the glue layer can be effectively relieved and absorbed, and the glue layer is not easy to split;
5) placing the weighed sodium tungstate dihydrate into a container according to the mass-to-volume ratio of 3-5:100g/mL, adding an ethanol solution with the mass fraction of 30-35%, then adjusting the pH value to 1.5-1.8 by using concentrated sulfuric acid with the mass fraction of 95-98%, transferring the obtained mixed solution into a reaction kettle with a polytetrafluoroethylene lining, placing the primarily formed corrugated paper into the mixed solution, sealing the reaction kettle, reacting at 93-98 ℃ for 7-10h, cooling to room temperature, taking out the corrugated paper, repeatedly washing with distilled water and ethanol, and drying at 60-70 ℃ for 20-25h to complete the processing technology of the corrugated paper; according to the method, ethanol is used as an inducer, a low-temperature hydrothermal synthesis method is utilized, inorganic tungsten trioxide nanosheets are self-grown in situ on the surface of corrugated paper, the formed tungsten trioxide nanosheets are attached to a nanoparticle layer with a hollowed-out shape on the surface of the corrugated paper, the friction coefficient between a surface sizing agent and the nanoparticle layer can be effectively reduced through the formed nanosheets, the surface sizing agent can easily penetrate through hollowed-out holes in the nanoparticles and is filled in the holes, the surface sizing agent can be in direct contact with the corrugated paper, and therefore the phenomenon that the surface sizing agent cannot be in contact with the corrugated paper due to the fact that a large amount of the surface sizing agent is accumulated in the nanoparticle layer due to high surface viscosity is.
Further, the short fibers are fibers processed by a grading sieve, the medium fibers are fibers processed by a first-stage fine sieve, the long fibers are fibers processed by a second-stage fine sieve, and the short fibers, the medium fibers and the long fibers are mixed in any proportion.
Further, the wire section forming is performed in a wire section forming system, the equipment of which comprises a breast roll shaker and a gravity dewatering box; the breast roll shaker generates vibration in the banner direction, the frequency of the vibration is 5-10Hz, and the amplitude is 10-15 mm; the gravity dewatering box is provided with a ceramic water scraping strip with adjustable angle and height, the water scraping angle of the ceramic water scraping strip is-5-5 degrees, and the water scraping height of the ceramic water scraping strip is 1-4 mm.
Compared with the prior art, the invention has the following advantages:
the corrugated paper processing technology provided by the invention introduces the prepared nanoparticles with special forms into the corrugated paper, the V-shaped nanostructures presented in the nanoparticles are like branches and can be wound with fibers in the corrugated paper, so that a layer of nanoparticle layer is formed on the surface of the corrugated paper, countless nanorod branches are randomly distributed on the surface of the corrugated paper, the formed nanorod branches are mutually crossed by taking the corrugated paper as a substrate, present a nanorod branch layer and present a hollowed-out shape internally, and meanwhile, in order to prevent the nanorod branch layer with larger surface viscosity and difficult to permeate the hollowed-out shape of the corrugated paper surface, the invention self-grows inorganic tungsten trioxide nanosheets on the surface of the corrugated paper in situ, the tungsten trioxide formed by the nanosheets is attached to the hollowed-out shape nanoparticle layer on the surface of the corrugated paper, and the friction coefficient between the surface sizing agent and the nanoparticle layer can be effectively reduced, the surface sizing agent is enabled to more easily penetrate through the hollowed-out holes in the nano particles and be filled in the holes, the surface sizing agent is prevented from being accumulated on the surface of the nano particle layer in a large amount, the phenomenon that the nano particle layer with the hollowed-out appearance exists between corrugated paper and the surface sizing agent is enabled to occur, the nano particle layer with the hollowed-out appearance has a low friction coefficient, the surface sizing agent can easily penetrate through the hollowed-out holes and is filled in the holes, the nano particle layer with the hollowed-out appearance is enabled to be completely embedded into a glue layer, a continuous-phase nanorod branch interweaving structure is formed inside the glue layer, the formed interweaving structure plays a good stabilizing role in the glue layer, the stress action in the glue layer can be effectively relieved and absorbed, the glue layer is enabled to be not prone to generate the phenomenon of glue failure, and the comprehensive.
Detailed Description
The present invention will be further described with reference to specific embodiments.
Example 1
A corrugated paper processing technology for improving easy glue opening of a corrugated paper surface sizing agent comprises the following specific technological methods:
1) weighing a proper amount of stannous chloride dihydrate, putting the stannous chloride dihydrate into a mortar, grinding for 20min, weighing a proper amount of sodium dodecyl benzoate, putting the sodium dodecyl benzoate into the mortar, grinding for 10min, mixing the ground stannous chloride dihydrate and the sodium dodecyl benzoate according to the mass ratio of 3:5, and then putting the mixture into the mortar, grinding for 10min for later use;
2) weighing a proper amount of potassium borohydride, putting the potassium borohydride into a mortar, grinding for 20min, weighing a proper amount of sodium dodecyl benzoate, putting the sodium dodecyl benzoate into the mortar, grinding for 10min, mixing the ground sodium borohydride and the ground sodium dodecyl benzoate according to the mass ratio of 1.3:5, and then putting the mixture into the mortar, grinding for 10min for later use;
3) mixing and grinding the products obtained in the step 1) and the step 2) for 30min according to the mass ratio of stannous chloride dihydrate to sodium borohydride of 2.0:1, standing in the air for 12h, repeatedly washing the obtained mixed powder with ethanol and distilled water respectively, drying, mixing and grinding the dried mixed powder with potassium chloride according to the mass ratio of 1:4, placing the mixed powder in a tubular furnace, and annealing at 800 ℃ for 3h to obtain nano particles;
4) separately grinding short fibers obtained by classified screening, medium fibers obtained by primary fine screening and long fibers obtained by secondary fine screening into pulp, then weighing three fibers according to the mass ratio of 1:1:1, adding the three fibers and nanoparticles into a pulp preparation tank together for mixing, controlling the nanoparticles to account for 3.2% of the total mass of the pulp, controlling the beating degree of the pulp to be 40 DEG SR, obtaining pulp, conveying the obtained pulp to a net part forming system for dewatering, and then forming, squeezing and drying through a net part to obtain preliminarily formed corrugated paper;
the vibration of the breast roll shaking device with the frequency of 5Hz and the amplitude of 10mm is generated in the banner direction, the water scraping angle of the water scraping strip of the gravity dewatering box is set to be 0 degree, and the water scraping height of the ceramic water scraping strip is 2 mm;
5) placing the weighed sodium tungstate dihydrate into a container according to the mass-to-volume ratio of 3:100g/mL, adding an ethanol solution with the mass fraction of 30%, then adjusting the pH value to 1.5 by using concentrated sulfuric acid with the mass fraction of 95%, transferring the obtained mixed solution into a reaction kettle with a polytetrafluoroethylene lining, placing the preliminarily formed corrugated paper into the mixed solution, sealing the reaction kettle, reacting for 7 hours at 93 ℃, cooling to room temperature, taking out the corrugated paper, repeatedly washing with distilled water and ethanol, and drying for 20 hours at 60 ℃, thus finishing the processing technology of the corrugated paper.
Comparative example 1: process step 5) was removed and the rest was the same as in example 1.
Comparative example 2: replacing the step 4) in the process, separately grinding short fibers obtained by classification screening, medium fibers obtained by primary fine screening and long fibers obtained by secondary fine screening into slurry, then weighing three fibers according to the mass ratio of 1:1:1, adding the three fibers into a slurry preparation pool for mixing, controlling the beating degree of the slurry to be 40 DEG SR to obtain slurry, conveying the obtained slurry to a net part forming system for dewatering, then forming, squeezing and drying the slurry through the net part to obtain preliminarily formed corrugated paper, then immersing the corrugated paper into nano-particle ultrapure water dispersion liquid with the solid content of 3.2%, vacuumizing to 20Pa, and carrying out vacuum treatment for 1h, wherein the rest steps are the same as those in the embodiment 1.
Control group: separately grinding short fibers obtained through classified screening, medium fibers obtained through first-stage fine screening and long fibers obtained through second-stage fine screening into pulp, then weighing the three fibers according to the mass ratio of 1:1:1, adding the three fibers into a pulp preparation tank for mixing, controlling the beating degree of pulp to be 40 DEG SR, obtaining pulp, conveying the obtained pulp to a net part forming system for dewatering, and then forming, squeezing and drying the pulp through a net part to obtain corrugated paper.
Test experiments
Adding a surface sizing agent into a surface sizing feeding tank, adding a surface moisture-proof agent into a starch sizing storage tank, performing surface sizing on the corrugated paper provided by the embodiment 1, the comparative examples 1-2 and the control group, then placing the corrugated paper into a drying cylinder, keeping the temperature at 130 ℃, keeping the water content at 5%, and standing the corrugated paper at room temperature for 24 hours to obtain the moisture-proof corrugated paper, wherein the surface sizing agent is a styrene-acrylic surface sizing agent, the addition amount of the surface sizing agent is 5 kg/ton (finished paper), the surface moisture-proof agent is a cationic surface moisture-proof agent, and the addition amount of the surface moisture-proof; drying the moisture-proof corrugated paper at 120 ℃ for 3min, and carrying out water absorption test on the obtained moisture-proof corrugated paper, wherein the results are as follows: the moisture-proof corrugated paper of example 1 had a water absorption of 20 gsm; the moisture-resistant corrugated paper of comparative example 1, having a water absorption of 52 gsm; the moisture-resistant corrugated paper of comparative example 2, having a water absorption of 35 gsm; the moisture-proof corrugated paper of the control group has the water absorption of 86 gsm; in addition, the glue layer in the embodiment 1 has no damage and crack; the glue layer of comparative example 1 was unbroken and had small cracks; the glue layer of comparative example 2 was unbroken with a small number of fine cracks; the glue layer of the control group is damaged; meanwhile, the ring crush index (n.m/g) of each moisture-proof corrugated paper was measured by CT300A compression strength tester of automated technology limited of yogzhou sutong bock, and the results were as follows: the ring crush index of the corrugated paper of example 1 is increased by 23.5% relative to the control; the ring crush index of the corrugated paper of comparative example 1 is increased by 5.6%; the ring crush index of the corrugated paper of comparative example 2 increased by 13.8%.
Example 2
A corrugated paper processing technology for improving easy glue opening of a corrugated paper surface sizing agent comprises the following specific technological methods:
1) weighing a proper amount of stannous chloride dihydrate, putting the stannous chloride dihydrate into a mortar, grinding for 25min, weighing a proper amount of sodium dodecyl benzoate, putting the sodium dodecyl benzoate into the mortar, grinding for 15min, mixing the ground stannous chloride dihydrate and the sodium dodecyl benzoate according to the mass ratio of 3.2:5, and then putting the mixture into the mortar, grinding for 12min for later use;
2) weighing a proper amount of potassium borohydride, putting the potassium borohydride into a mortar, grinding for 25min, weighing a proper amount of sodium dodecyl benzoate, putting the sodium dodecyl benzoate into the mortar, grinding for 15min, mixing the ground sodium borohydride and the ground sodium dodecyl benzoate according to a mass ratio of 1.5:5, and then putting the mixture into the mortar, grinding for 12min for later use;
3) mixing and grinding the products obtained in the step 1) and the step 2) for 35min according to the mass ratio of stannous chloride dihydrate to sodium borohydride being 2.1:1, placing the mixture in the air for 13h, repeatedly washing the obtained mixed powder with ethanol and distilled water respectively, drying the mixed powder, mixing and grinding the dried mixed powder with potassium chloride according to the mass ratio of 1:4.2, placing the mixed powder in a tubular furnace, and annealing the mixed powder at 830 ℃ for 3.5h to obtain nano particles;
4) separately grinding short fibers obtained by classified screening, medium fibers obtained by primary fine screening and long fibers obtained by secondary fine screening into pulp, then weighing three fibers according to the mass ratio of 1:1:1, adding the three fibers and nanoparticles into a pulp preparation tank together for mixing, controlling the nanoparticles to account for 3.8% of the total mass of the pulp, controlling the beating degree of the pulp to be 45 DEG SR, obtaining pulp, conveying the obtained pulp to a net part forming system for dewatering, and then forming, squeezing and drying through a net part to obtain preliminarily formed corrugated paper;
the vibration of the breast roll shaking device with the frequency of 10Hz and the amplitude of 15mm is generated in the banner direction, the water scraping angle of the water scraping strip of the gravity dewatering box is set to be 5 degrees, and the water scraping height of the ceramic water scraping strip is 2 mm;
5) placing the weighed sodium tungstate dihydrate into a container according to the mass-to-volume ratio of 4:100g/mL, adding an ethanol solution with the mass fraction of 32%, then adjusting the pH value to 1.6 by using concentrated sulfuric acid with the mass fraction of 95-98%, transferring the obtained mixed solution into a reaction kettle with a polytetrafluoroethylene lining, placing the preliminarily formed corrugated paper into the mixed solution, sealing the reaction kettle, reacting for 8 hours at 95 ℃, cooling to room temperature, taking out the corrugated paper, repeatedly washing with distilled water and ethanol, and drying for 23 hours at 65 ℃, thus finishing the processing technology of the corrugated paper.
Comparative example 1: process step 5) was removed and the rest was the same as in example 2.
Comparative example 2: replacing the step 4) in the process, separately grinding the short fibers obtained by classification screening, the middle fibers obtained by primary fine screening and the long fibers obtained by secondary fine screening into slurry, then weighing the three fibers according to the mass ratio of 1:1:1, adding the three fibers into a slurry preparation tank for mixing, controlling the beating degree of the slurry to be 45 DEG SR to obtain slurry, conveying the obtained slurry to a net part forming system for dewatering, then forming, squeezing and drying the slurry through the net part to obtain preliminarily formed corrugated paper, then immersing the corrugated paper into nano-particle ultrapure water dispersion liquid with the solid content of 3.8%, vacuumizing to 20Pa, and carrying out vacuum treatment for 1h, wherein the rest steps are the same as those in the embodiment 2.
Control group: separately grinding short fibers obtained through classified screening, medium fibers obtained through first-stage fine screening and long fibers obtained through second-stage fine screening into pulp, then weighing the three fibers according to the mass ratio of 1:1:1, adding the three fibers into a pulp preparation tank for mixing, controlling the beating degree of pulp to be 45 DEG SR, obtaining pulp, conveying the obtained pulp to a net part forming system for dewatering, and then forming, squeezing and drying the pulp through a net part to obtain corrugated paper.
Test experiments
Adding a surface sizing agent into a surface sizing feeding tank, adding a surface moisture-proof agent into a starch sizing storage tank, performing surface sizing on the corrugated paper provided by the embodiment 2, the comparative examples 1-2 and the control group, then placing the corrugated paper into a drying cylinder, keeping the temperature at 130 ℃, keeping the water content at 5%, and standing the corrugated paper at room temperature for 24 hours to obtain the moisture-proof corrugated paper, wherein the surface sizing agent is a styrene-acrylic surface sizing agent, the addition amount of the surface sizing agent is 5 kg/ton (finished paper), the surface moisture-proof agent is a cationic surface moisture-proof agent, and the addition amount of the surface moisture-proof; drying the moisture-proof corrugated paper at 120 ℃ for 3min, and carrying out water absorption test on the obtained moisture-proof corrugated paper, wherein the results are as follows: the moisture-proof corrugated paper of example 2 had a water absorption of 25 gsm; the moisture-resistant corrugated paper of comparative example 1, having a water absorption of 60 gsm; the moisture-resistant corrugated paper of comparative example 2, having a water absorption of 39 gsm; the moisture-proof corrugated paper of the control group has the water absorption of 86 gsm; in addition, the glue layer in the embodiment 2 has no damage and crack; the glue layer of comparative example 1 was unbroken and had small cracks; the glue layer of comparative example 2 was unbroken with a small number of fine cracks; the glue layer of the control group is damaged; meanwhile, the ring crush index (n.m/g) of each moisture-proof corrugated paper was measured by CT300A compression strength tester of automated technology limited of yogzhou sutong bock, and the results were as follows: the ring crush index of the corrugated paper of example 2 is increased by 21.4% relative to the control; the ring crush index of the corrugated paper of comparative example 1 is increased by 4.7%; the ring crush index of the corrugated paper of comparative example 2 increased by 12.6%.
Example 3
A corrugated paper processing technology for improving easy glue opening of a corrugated paper surface sizing agent comprises the following specific technological methods:
1) weighing a proper amount of stannous chloride dihydrate, putting the stannous chloride dihydrate into a mortar, grinding for 30min, weighing a proper amount of sodium dodecyl benzoate, putting the sodium dodecyl benzoate into the mortar, grinding for 20min, mixing the ground stannous chloride dihydrate and the sodium dodecyl benzoate according to the mass ratio of 3.5:5, and then putting the mixture into the mortar, grinding for 15min for later use;
2) weighing a proper amount of potassium borohydride, putting the potassium borohydride into a mortar, grinding for 30min, weighing a proper amount of sodium dodecyl benzoate, putting the sodium dodecyl benzoate into the mortar, grinding for 20min, mixing the ground sodium borohydride and the ground sodium dodecyl benzoate according to the mass ratio of 1.6:5, and then putting the mixture into the mortar, grinding for 15min for later use;
3) mixing and grinding the products obtained in the step 1) and the step 2) for 40min according to the mass ratio of stannous chloride dihydrate to sodium borohydride being 2.3:1, placing the mixture in the air for 15h, repeatedly washing the obtained mixed powder with ethanol and distilled water respectively, drying the mixed powder, mixing and grinding the dried mixed powder with potassium chloride according to the mass ratio of 1:4.3, placing the mixed powder in a tubular furnace, and annealing the mixed powder at 850 ℃ for 4h to obtain nano particles;
4) separately grinding short fibers obtained by classified screening, medium fibers obtained by primary fine screening and long fibers obtained by secondary fine screening into pulp, then weighing three fibers according to the mass ratio of 1:1:1, adding the three fibers and nanoparticles into a pulp preparation tank together for mixing, controlling the nanoparticles to account for 4.6% of the total mass of the pulp, controlling the beating degree of the pulp to be 50 DEG SR, obtaining pulp, conveying the obtained pulp to a net part forming system for dewatering, and then forming, squeezing and drying through a net part to obtain preliminarily formed corrugated paper;
the vibration of the breast roll shaking device with the frequency of 10Hz and the amplitude of 15mm is generated in the banner direction, the water scraping angle of the water scraping strip of the gravity dewatering box is set to be 5 degrees, and the water scraping height of the ceramic water scraping strip is 4 mm;
5) placing the weighed sodium tungstate dihydrate into a container according to the mass-to-volume ratio of 5:100g/mL, adding 35% by mass of ethanol solution, adjusting the pH value to 1.8 by using 95-98% by mass of concentrated sulfuric acid, transferring the obtained mixed solution into a reaction kettle with a polytetrafluoroethylene lining, placing the preliminarily formed corrugated paper into the mixed solution, sealing the reaction kettle, reacting for 10 hours at 98 ℃, cooling to room temperature, taking out the corrugated paper, repeatedly washing with distilled water and ethanol, and drying for 25 hours at 70 ℃, thus finishing the processing technology of the corrugated paper.
Comparative example 1: process step 5) was removed and the rest was the same as in example 3.
Comparative example 2: replacing the step 4) in the process, separately grinding short fibers obtained by classification screening, medium fibers obtained by primary fine screening and long fibers obtained by secondary fine screening into slurry, then weighing three fibers according to the mass ratio of 1:1:1, adding the three fibers into a slurry preparation pool for mixing, controlling the beating degree of the slurry to be 50 DEG SR, obtaining slurry, conveying the obtained slurry to a net part forming system for dewatering, then forming, squeezing and drying the slurry through a net part to obtain preliminarily formed corrugated paper, then immersing the corrugated paper into nano-particle ultrapure water dispersion liquid with the solid content of 4.6%, vacuumizing to 20Pa, and carrying out vacuum treatment for 1h, wherein the rest steps are the same as those in the embodiment 3.
Control group: separately grinding short fibers obtained through classified screening, medium fibers obtained through first-stage fine screening and long fibers obtained through second-stage fine screening into pulp, then weighing the three fibers according to the mass ratio of 1:1:1, adding the three fibers into a pulp preparation tank for mixing, controlling the beating degree of the pulp to be 50-degree SR to obtain pulp, conveying the obtained pulp to a net part forming system for dewatering, and then forming, squeezing and drying the pulp through a net part to obtain corrugated paper.
Test experiments
Adding a surface sizing agent into a surface sizing feeding tank, adding a surface moisture-proof agent into a starch size storage tank, performing surface sizing on the corrugated paper provided by the embodiment 3, the comparative examples 1-2 and the control group, then placing the corrugated paper into a drying cylinder, keeping the temperature at 130 ℃, keeping the water content at 5%, and standing the corrugated paper at room temperature for 24 hours to obtain the moisture-proof corrugated paper, wherein the surface sizing agent is a styrene-acrylic surface sizing agent, the addition amount of the surface sizing agent is 5 kg/ton (finished paper), the surface moisture-proof agent is a cationic surface moisture-proof agent, and the addition amount of the surface moisture-proof; drying the moisture-proof corrugated paper at 120 ℃ for 3min, and carrying out water absorption test on the obtained moisture-proof corrugated paper, wherein the results are as follows: the moisture-proof corrugated paper of example 3 had a water absorption of 23 gsm; the moisture-resistant corrugated paper of comparative example 1, having a water absorption of 58 gsm; the moisture-resistant corrugated paper of comparative example 2, having a water absorption of 37 gsm; the moisture-proof corrugated paper of the control group has the water absorption of 87 gsm; in addition, the glue layer in the embodiment 3 has no damage and crack; the glue layer of comparative example 1 was unbroken and had small cracks; the glue layer of comparative example 2 was unbroken with a small number of fine cracks; the glue layer of the control group is damaged; meanwhile, the ring crush index (n.m/g) of each moisture-proof corrugated paper was measured by CT300A compression strength tester of automated technology limited of yogzhou sutong bock, and the results were as follows: the ring crush index of the corrugated paper of example 3 is increased by 22.1% relative to the control; the ring crush index of the corrugated paper of comparative example 1 is increased by 5.2%; the ring crush index of the corrugated paper of comparative example 2 increased by 13.3%.
According to the test results, the corrugated paper processing technology provided by the invention can effectively reduce the glue failure phenomenon of the corrugated paper surface sizing agent, so that the comprehensive performance of the corrugated paper is enhanced.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention.
Claims (7)
1. A corrugated paper processing technology for improving easy glue opening of a corrugated paper surface sizing agent is characterized by comprising the following specific technological methods:
1) weighing a proper amount of stannous chloride dihydrate, putting the stannous chloride dihydrate into a mortar, grinding for 20-30min, weighing a proper amount of sodium dodecyl benzoate, putting the sodium dodecyl benzoate into the mortar, grinding for 10-20min, mixing the ground stannous chloride dihydrate and the sodium dodecyl benzoate, and then putting the mixture into the mortar, grinding for 10-15min for later use;
2) weighing a proper amount of potassium borohydride, putting the potassium borohydride into a mortar, grinding for 20-30min, weighing a proper amount of sodium dodecyl benzoate, putting the sodium dodecyl benzoate into the mortar, grinding for 10-20min, mixing the ground sodium borohydride and the ground sodium dodecyl benzoate, and then putting the mixture into the mortar, grinding for 10-15min for later use;
3) mixing and grinding the products obtained in the steps 1) and 2) for 30-40min, placing in the air for 12-15h, repeatedly washing the obtained mixed powder with ethanol and distilled water respectively, drying, mixing and grinding with a proper amount of potassium chloride, placing in a tubular furnace, and annealing at 800-850 ℃ for 3-4h to obtain nano particles;
4) separately grinding long fibers, medium fibers and short fibers into pulp, adding the pulp and nanoparticles into a pulp preparation pool for mixing, controlling the beating degree of the pulp to be 40-50 DEG SR to obtain pulp, conveying the obtained pulp to a net part forming system for dehydration, and then forming, squeezing and drying the pulp through a net part to obtain primary formed corrugated paper;
5) weighing a proper amount of sodium tungstate dihydrate, placing the sodium tungstate dihydrate in a container, adding a proper amount of ethanol solution, adjusting the pH value to 1.5-1.8 by using concentrated sulfuric acid, transferring the obtained mixed solution to a reaction kettle with a polytetrafluoroethylene lining, placing the preliminarily formed corrugated paper in the mixed solution, sealing the reaction kettle, reacting for 7-10h at 93-98 ℃, cooling to room temperature, taking out the corrugated paper, repeatedly washing with distilled water and ethanol, and drying to finish the processing technology of the corrugated paper.
2. The process for processing corrugated paper for improving the easy opening of the corrugated paper surface sizing agent as claimed in claim 1, wherein in the process step 1), the mass ratio of the stannous chloride dihydrate to the sodium dodecyl benzoate is 3-3.5: 5.
3. The process for processing corrugated paper for improving the easy opening of the corrugated paper surface sizing agent as claimed in claim 1, wherein in the process step 2), the mass ratio of the sodium borohydride to the sodium dodecyl benzoate is 1.3-1.6: 5.
4. The process for processing corrugated paper for improving the easy opening of the corrugated paper surface sizing agent as claimed in claim 1, wherein in the process step 3), the mass ratio of stannous chloride dihydrate to sodium borohydride in the mixed powder is 2.0-2.3: 1; the mass ratio of the potassium chloride to the mixed powder is 4-4.3: 1.
5. The process for processing corrugated paper for improving the easy splitting of the corrugated paper surface sizing agent as claimed in claim 1, wherein in the process step 4), the short fibers are fibers subjected to classifying screen treatment, the medium fibers are fibers subjected to primary fine screen treatment, and the long fibers are fibers subjected to secondary fine screen treatment; the nano particles account for 3.2-4.6% of the total mass of the slurry.
6. The process of claim 1, wherein in step 4), the wire forming is performed in a wire forming system using equipment comprising a breast roll shaker and a gravity dewatering box; the breast roll shaker generates vibration in the banner direction, the frequency of the vibration is 5-10Hz, and the amplitude is 10-15 mm; the gravity dewatering box is provided with a ceramic water scraping strip with adjustable angle and height, the water scraping angle of the ceramic water scraping strip is-5-5 degrees, and the water scraping height of the ceramic water scraping strip is 1-4 mm.
7. The corrugated paper processing technology for improving the easy opening of the corrugated paper surface sizing agent as claimed in claim 1, wherein in the process step 5), the mass volume ratio of the sodium tungstate dihydrate to the ethanol solution is 3-5:100g/mL, and the mass fraction of the ethanol solution is 30-35%; the mass fraction of the concentrated sulfuric acid is 95-98%; the drying temperature is 60-70 ℃, and the drying time is 20-25 h.
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