CN115182200B - Controllable-expansion-rate facing raw paper and preparation method thereof - Google Patents
Controllable-expansion-rate facing raw paper and preparation method thereof Download PDFInfo
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- CN115182200B CN115182200B CN202210685898.5A CN202210685898A CN115182200B CN 115182200 B CN115182200 B CN 115182200B CN 202210685898 A CN202210685898 A CN 202210685898A CN 115182200 B CN115182200 B CN 115182200B
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- glass fiber
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- 238000002360 preparation method Methods 0.000 title claims abstract description 28
- 239000003365 glass fiber Substances 0.000 claims abstract description 138
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical group [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 claims abstract description 64
- 239000000835 fiber Substances 0.000 claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- RYAGRZNBULDMBW-UHFFFAOYSA-L calcium;3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Ca+2].COC1=CC=CC(CC(CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O RYAGRZNBULDMBW-UHFFFAOYSA-L 0.000 claims abstract description 31
- 229920005551 calcium lignosulfonate Polymers 0.000 claims abstract description 30
- 239000011122 softwood Substances 0.000 claims abstract description 30
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 12
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 132
- 239000002002 slurry Substances 0.000 claims description 33
- 239000003795 chemical substances by application Substances 0.000 claims description 26
- 239000007822 coupling agent Substances 0.000 claims description 26
- 239000011347 resin Substances 0.000 claims description 26
- 229920005989 resin Polymers 0.000 claims description 26
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 23
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 23
- 238000006243 chemical reaction Methods 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 21
- 238000004537 pulping Methods 0.000 claims description 21
- 238000001035 drying Methods 0.000 claims description 20
- 230000007935 neutral effect Effects 0.000 claims description 20
- 238000004513 sizing Methods 0.000 claims description 20
- 238000001914 filtration Methods 0.000 claims description 19
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims description 18
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N Glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 18
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 17
- 229920002635 polyurethane Polymers 0.000 claims description 17
- 239000004814 polyurethane Substances 0.000 claims description 17
- BDLXTDLGTWNUFM-UHFFFAOYSA-N 2-[(2-methylpropan-2-yl)oxy]ethanol Chemical compound CC(C)(C)OCCO BDLXTDLGTWNUFM-UHFFFAOYSA-N 0.000 claims description 11
- 239000011259 mixed solution Substances 0.000 claims description 10
- 238000005406 washing Methods 0.000 claims description 9
- 239000002270 dispersing agent Substances 0.000 claims description 6
- 235000021355 Stearic acid Nutrition 0.000 claims description 3
- 125000000129 anionic group Chemical group 0.000 claims description 3
- 238000004821 distillation Methods 0.000 claims description 3
- 239000000839 emulsion Substances 0.000 claims description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 3
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 3
- 229920002401 polyacrylamide Polymers 0.000 claims description 3
- 239000008117 stearic acid Substances 0.000 claims description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 229920001296 polysiloxane Polymers 0.000 claims 1
- 229920001131 Pulp (paper) Polymers 0.000 abstract description 11
- 238000005728 strengthening Methods 0.000 abstract description 3
- 239000006087 Silane Coupling Agent Substances 0.000 description 13
- 230000001276 controlling effect Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 230000001105 regulatory effect Effects 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 238000006116 polymerization reaction Methods 0.000 description 8
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 7
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 230000008602 contraction Effects 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 241000196324 Embryophyta Species 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 239000005038 ethylene vinyl acetate Substances 0.000 description 4
- 230000007062 hydrolysis Effects 0.000 description 4
- 238000006460 hydrolysis reaction Methods 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 125000000524 functional group Chemical group 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000004113 Sepiolite Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 239000012784 inorganic fiber Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 2
- 229910052624 sepiolite Inorganic materials 0.000 description 2
- 235000019355 sepiolite Nutrition 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000006683 Mannich reaction Methods 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 125000004202 aminomethyl group Chemical group [H]N([H])C([H])([H])* 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- AQEFLFZSWDEAIP-UHFFFAOYSA-N di-tert-butyl ether Chemical compound CC(C)(C)OC(C)(C)C AQEFLFZSWDEAIP-UHFFFAOYSA-N 0.000 description 1
- 125000005456 glyceride group Chemical group 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000005606 hygroscopic expansion Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- SCPYDCQAZCOKTP-UHFFFAOYSA-N silanol Chemical compound [SiH3]O SCPYDCQAZCOKTP-UHFFFAOYSA-N 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material 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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/18—Paper- or board-based structures for surface covering
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/12—General methods of coating; Devices therefor
- C03C25/16—Dipping
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/24—Coatings containing organic materials
- C03C25/40—Organo-silicon compounds
-
- 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
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
-
- 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
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/36—Inorganic fibres or flakes
- D21H13/38—Inorganic fibres or flakes siliceous
- D21H13/40—Inorganic fibres or flakes siliceous vitreous, e.g. mineral wool, glass fibres
-
- 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
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/14—Carboxylic acids; Derivatives thereof
-
- 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
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/35—Polyalkenes, e.g. polystyrene
-
- 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
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/41—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups
- D21H17/44—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups cationic
- D21H17/45—Nitrogen-containing groups
-
- 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
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/53—Polyethers; Polyesters
-
- 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
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
- D21H17/57—Polyureas; Polyurethanes
-
- 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
- D21H21/06—Paper forming aids
- D21H21/08—Dispersing agents for fibres
-
- 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
- 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
- D21H21/18—Reinforcing agents
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
Abstract
The invention relates to the technical field of facing base paper preparation, and discloses a controllable-expansion-rate facing base paper and a preparation method thereof, wherein the facing base paper is prepared from the following raw materials in parts by weight: 120-150 parts of softwood pulp fiber, 10-25 parts of modified glass fiber and 1-10 parts of auxiliary agent; the modified glass fiber is an aminosilane oligomer modified glass fiber grafted by calcium lignosulfonate. The invention adopts the softwood pulp fiber and the glass fiber as raw materials of the facing raw paper, can play a role in strengthening and improve the tensile strength of the facing raw paper under the condition of ensuring low expansion rate; the modified glass fiber can improve hydrophilicity and the combination property with the softwood pulp fiber, and can greatly reduce the content of water in the wood pulp fiber after being dispersed and combined with the wood pulp fiber, reduce the expansion rate of the facing base paper and finally obtain the facing base paper with high dimensional stability.
Description
Technical Field
The invention relates to the technical field of preparation of facing base paper, in particular to facing base paper with controllable expansion rate and a preparation method thereof.
Background
The stretchability of paper is expressed as a percentage of the original sample in terms of the amount of increase in the longitudinal or transverse length of the paper sample after immersing the paper sample in water, which has been equilibrated in the standard atmospheric pressure, and the stretchability after immersing in water and air drying is also expressed in this way. When the moisture absorption of each part of the paper is uneven in the printing process and the storage process, the paper shape changes, such as lotus leaf edge, tight edge, curl, fold, wave and the like, can be generated. Slight deformation causes difficulty in printing, and paper cannot be used when the deformation is severe. The paper retractility has a severe impact on the printing process and quality of the print, mainly in the following cases: the first condition is that the multicolor printing is not accurate in overprinting, and when the offset press prints, each printing color passes through the fountain solution once, and stretches; in the second case, the paper is stretched and contracted for each color group of the solvent or the water-based ink for intaglio printing and flexographic printing, so that the problem of inaccurate multicolor overprinting is caused, and the post-printing processing is difficult; the third condition is that the paper absorbs moisture or loses water to stretch after being printed, and the paper can be inaccurate in alignment and cause a large amount of waste products when post-processing such as gold stamping, die cutting, box pasting and other procedures are carried out.
The Chinese patent publication No. CN114481671A discloses a method for preparing base paper of facing paper by using plant fibers, which comprises the following steps: (1) Preparing raw materials including plant fibers, inorganic fibers, sepiolite, EVA resin and a modifier; (2) Adding water into plant fiber, stirring, adding inorganic fiber, sepiolite, EVA resin and modifier, and stirring uniformly to obtain a mixed material; (3) disc grinding and pulping the mixed material to obtain slurry; (4) Vacuum dewatering, squeezing dewatering and drying dewatering to obtain the base paper of the facing paper. However, the plant fiber has a large water content in the inner cavity, and the degree of stretch generated is also large, and the problem that the paper stretch affects the printing process and the quality of the printing quality cannot be solved. In the prior art, in order to reduce the expansion rate of the facing base paper as much as possible, the dimensional stability of the facing base paper is ensured as much as possible, a large amount of chemical fibers are added, more high-cost resin glue is used in the gluing process, and the cost of the facing base paper is greatly increased due to the large amount of chemical fibers and the gluing amount.
Disclosure of Invention
In order to solve the problem that the stretchability of the facing base paper affects the printing process and the quality of the printing quality, the invention provides the facing base paper with controllable stretchability and the preparation method thereof, which adopts the softwood pulp fiber and the glass fiber as raw materials, and modifies the glass fiber, thereby reducing the stretchability of the facing base paper and ensuring high dimensional stability.
The specific technical scheme of the invention is as follows:
in a first aspect, the invention provides a controllable expansion rate facing base paper, which is prepared from the following raw materials in parts by weight: 120-150 parts of softwood pulp fiber, 10-25 parts of modified glass fiber and 1-10 parts of auxiliary agent; the modified glass fiber is an aminosilane oligomer modified glass fiber grafted by calcium lignosulfonate.
The natural wood pulp fiber has cavities inside, and the moisture in the cavities causes the paper product to shrink under heating, or the water absorption inside the fiber causes the moisture absorption expansion phenomenon of the paper product. The selected softwood pulp fibers belong to fine fibers, the internal cavity is smaller, and the degree of deformation of the base paper caused by thermal shrinkage and hygroscopic expansion is smaller, so that the dimensional stability of the base paper is better. The glass fiber has poor hygroscopicity, and can be used as raw material of facing raw paper together with the softwood pulp fiber, so that the glass fiber can play a role in strengthening and improve the tensile strength of the facing raw paper under the condition of ensuring low expansion and contraction rate. However, glass fibers are poor in hydrophilicity and have been surface-modified with an aminosilane oligomer to provide a large number of hydroxyl groups on the surface thereof, thereby improving hydrophilicity and bonding with softwood pulp fibers. And then through calcium lignosulfonate grafting, the calcium lignosulfonate has good adsorption and dispersion properties in aqueous solution, so that the dispersibility and the bonding firmness of the glass fibers in the slurry are further improved, the content of water in the wood pulp fibers can be greatly reduced, the expansion rate of the facing base paper is reduced, and finally the facing base paper with high dimensional stability is obtained.
Preferably, the auxiliary agent comprises a pulp dispersing agent and a water-resistant and moisture-proof agent.
The auxiliary agent can improve the water-proof and moisture-proof properties of the base paper.
Preferably, the pulp dispersing agent is one or more of polyethylene oxide resin and anionic polyacrylamide resin.
Preferably, the water-resistant and moisture-proof agent is one or more of aqueous polyurethane, organic silicon emulsion, stearic acid glue and EVA resin.
Preferably, the preparation method of the modified glass fiber comprises the following steps:
(1) Placing glass fibers into a sizing agent for normal temperature treatment for 4-8 hours, wherein the sizing agent comprises the following components in percentage by mass of 10-20: 35-50: 6-14: 3-8: 1-5 of an aminosilane coupling agent, methanol, saturated fatty acid glyceride, ethylene glycol tertiary butyl ether and water, filtering and taking out to obtain an aminosilane coupling agent modified glass fiber; adding the mixture into a mixed solution of methanol and ammonia water, heating to 50-70 ℃ for reaction for 1-2 h, regulating pH to be neutral, and then removing the methanol by reduced pressure distillation to obtain the aminosilane oligomer modified glass fiber; (2) Dispersing aminosilane oligomer modified glass fiber in water, adding calcium lignosulfonate, glutaraldehyde and diethylenetriamine, heating to 60-80 ℃ and reacting for 2-4 h; and after the reaction is finished, filtering, washing and drying are sequentially carried out to obtain the modified glass fiber.
The glass fiber as inorganic reinforced fiber can improve the tensile strength of the base paper, fill the gaps among the softwood pulp fibers and improve the surface flatness. The amino silane coupling agent is modified by the coupling action of the amino silane coupling agent on the surface of the glass fiber, the hydrolysis performance of the amino silane coupling agent generates rich hydroxyl groups, and the amino silane coupling agent is self-polymerized on the surface of the glass fiber to form an amino silane oligomer by controlling the components of the impregnating compound and the heating reaction conditions, so that the amino silane coupling agent can simultaneously retain amino end groups and a part of hydroxyl groups. The hydroxyl groups can improve the hydrophilicity of the glass fiber and facilitate the tight combination of the glass fiber and wood pulp fiber. The amino group can be grafted with calcium lignosulfonate, and the Mannich reaction is carried out when amines, aldehydes and compounds containing active hydrogen atoms are condensed, so that the active hydrogen atoms on the calcium lignosulfonate can be replaced by aminomethyl groups. The calcium lignin sulfonate also contains carboxyl, sulfonic acid groups and other acidic functional groups, has strong electronegativity and hydrophilicity, can form good adsorption dispersion in wood pulp fiber slurry, and can damage hollow structures of fiber tissues to a certain extent, so that water in fiber cavities is dispersed, the content of water in the fibers is greatly reduced, and the thermal denaturation resistance and the hygroscopicity of glass fibers are poor, so that the dimensional stability of the prepared facing base paper is greatly improved.
The calcium lignosulfonate is introduced into the silane coupling agent oligomer modified on the surface of the glass fiber, so that the steric hindrance of the silane coupling agent oligomer can be effectively improved, the purpose that silanol is limited to self-polymerize after the silane coupling agent oligomer is hydrolyzed, but is not easy to self-polymerize into a gel state can be realized, the stability of the silane coupling agent oligomer under the condition of water content is ensured, and the activity of the silane coupling agent oligomer is improved.
Preferably, in the step (1), the mass ratio of the aminosilane coupling agent modified glass fiber to the methanol to the ammonia water is 1: 50-80: 2 to 5; the concentration of the ammonia water is 25-30%.
The saturated fatty glyceride in the impregnating compound is used as a surfactant, the addition of the ethylene glycol tertiary butyl ether can prevent the self-polymerization reaction of the aminosilane coupling agent, the proportion of methanol and water influences the hydrolysis rate of the aminosilane coupling agent, the hydrolysis rate and the self-polymerization reaction are balanced, a large number of hydroxyl groups are ensured to be obtained, and the coupling and combining effects of the aminosilane coupling agent on the surface of the glass fiber are also good. At the same time, the extent of the reaction also needs to be controlled for the subsequent self-polymerization to occur to give a silane oligomer which retains both the amino end groups and a portion of the hydroxyl groups.
Preferably, in the step (2), the mass-volume ratio of the aminosilane oligomer modified glass fiber, calcium lignosulfonate, glutaraldehyde and diethylenetriamine is 2-5 g:0.5 g to 2g: 5-10 mL: 1-2 mL.
Since calcium lignosulfonate is a macromolecular structure similar to a sphere, too much addition thereof also affects the surface evenness and flatness of the base paper.
In a second aspect, the invention also provides a preparation method of the facing base paper with the controllable expansion rate, which comprises the following steps:
s1: mixing the softwood pulp fibers and the modified glass fibers, pulping for 20-40 min, controlling the pulping degree to be 28-35 DEG SR, adjusting the pH value of the slurry to be neutral, and adding an auxiliary agent to mix to obtain the slurry for later use;
s2: and (3) dehydrating, squeezing and drying the slurry obtained in the step (S1) to obtain the facing base paper.
The invention firstly mixes and pulps the softwood pulp fiber and the modified glass fiber, ensures better dispersity and bonding stability, and then adds the auxiliary agent for mixing, thereby improving the uniformity and the water-proof and moisture-proof performances of the base paper.
Compared with the prior art, the invention has the beneficial effects that:
(1) The needled wood pulp fiber and the glass fiber are used as raw materials of the facing raw paper, so that the facing raw paper can play a role in strengthening and improve the tensile strength of the facing raw paper under the condition of ensuring low expansion rate;
(2) The modified glass fiber can improve hydrophilicity and the combination property with the softwood pulp fiber, and can greatly reduce the content of water in the wood pulp fiber after being dispersed and combined with the wood pulp fiber, reduce the expansion rate of the facing base paper and finally obtain the facing base paper with high dimensional stability.
Detailed Description
The invention is further described below with reference to examples.
General examples
The facing base paper with controllable expansion rate is prepared from the following raw materials in parts by weight: 120-150 parts of softwood pulp fiber, 10-25 parts of modified glass fiber and 1-10 parts of auxiliary agent. Wherein, the auxiliary agent comprises a paper pulp dispersing agent and a water-resistant and moisture-proof agent; the pulp dispersing agent is one or more of polyethylene oxide resin and anionic polyacrylamide resin; the water-resistant and moisture-proof agent is one or more of water-based polyurethane, organic silicon emulsion, stearic acid glue and EVA resin.
The preparation method of the modified glass fiber comprises the following steps:
(1) Placing glass fibers into a sizing agent for normal temperature treatment for 4-8 hours, wherein the sizing agent comprises the following components in percentage by mass of 10-20: 35-50: 6-14: 3-8: 1-5 of an aminosilane coupling agent, methanol, saturated fatty acid glyceride, ethylene glycol tertiary butyl ether and water, filtering and taking out to obtain an aminosilane coupling agent modified glass fiber; adding the modified glass fiber into a mixed solution of methanol and ammonia water with the concentration of 25-30%, wherein the mass ratio of the aminosilane coupling agent to the modified glass fiber to the methanol to the ammonia water is 1: 50-80: 2 to 5; heating to 50-70 ℃ to react for 1-2 h, regulating the pH to be neutral, and then removing methanol by reduced pressure distillation to obtain the aminosilane oligomer modified glass fiber;
(2) Dispersing aminosilane oligomer modified glass fiber in water, and adding calcium lignosulfonate, glutaraldehyde and diethylenetriamine, wherein the mass volume ratio of the aminosilane oligomer modified glass fiber to the calcium lignosulfonate to the glutaraldehyde to the diethylenetriamine is 2-5 g:0.5 g to 2g: 5-10 mL: 1-2 mL, heating to 60-80 ℃ and reacting for 2-4 h; and after the reaction is finished, filtering, washing and drying are sequentially carried out to obtain the modified glass fiber.
The preparation method of the facing base paper with the controllable expansion rate comprises the following steps:
s1: mixing the softwood pulp fibers and the modified glass fibers, pulping for 20-40 min, controlling the pulping degree to be 28-35 DEG SR, adjusting the pH value of the slurry to be neutral, and adding an auxiliary agent to mix to obtain the slurry for later use;
s2: and (3) dehydrating, squeezing and drying the slurry obtained in the step (S1) to obtain the facing base paper.
Example 1
The facing base paper with controllable expansion rate is prepared from the following raw materials in parts by weight: 140 parts of softwood pulp fiber, 15 parts of modified glass fiber, 1 part of polyethylene oxide resin and 5 parts of waterborne polyurethane.
The preparation method of the modified glass fiber comprises the following steps:
(1) Placing the glass fiber into a sizing agent for normal temperature treatment for 6 hours, wherein the mass ratio of the sizing agent is 15:42:9:5:3, mixing gamma-aminopropyl triethoxysilane, methanol, saturated fatty acid glyceride, ethylene glycol tertiary butyl ether and water, and filtering to obtain the aminosilane coupling agent modified glass fiber; adding the modified glass fiber into a mixed solution of methanol and 28% ammonia water, wherein the mass ratio of the aminosilane coupling agent to the modified glass fiber to the methanol to the ammonia water is 1:60:3, a step of; heating to 55 ℃ for reaction for 2 hours, regulating the pH to be neutral, and then distilling under reduced pressure to remove methanol to obtain aminosilane oligomer modified glass fiber;
(2) Dispersing aminosilane oligomer modified glass fiber in water, and adding calcium lignosulfonate, glutaraldehyde and diethylenetriamine, wherein the mass volume ratio of the aminosilane oligomer modified glass fiber to the calcium lignosulfonate to the glutaraldehyde to the diethylenetriamine is 3g:0.8g:7mL:1mL, heating to 75 ℃ and reacting for 3h; and after the reaction is finished, filtering, washing and drying are sequentially carried out to obtain the modified glass fiber.
The preparation method of the facing base paper with the controllable expansion rate comprises the following steps:
s1: mixing the softwood pulp fibers and the modified glass fibers, pulping for 35min, controlling the pulping degree to be 32 DEG SR, adjusting the pH value of the slurry to be neutral, and adding the polyethylene oxide resin and the aqueous polyurethane to uniformly mix to obtain the slurry for later use;
s2: and (3) dehydrating, squeezing and drying the slurry obtained in the step (S1) to obtain the facing base paper.
Example 2
The facing base paper with controllable expansion rate is prepared from the following raw materials in parts by weight: 140 parts of softwood pulp fiber, 15 parts of modified glass fiber, 1 part of polyethylene oxide resin and 5 parts of waterborne polyurethane.
The preparation method of the modified glass fiber comprises the following steps:
(1) Placing the glass fiber into a sizing agent for normal temperature treatment for 5 hours, wherein the mass ratio of the sizing agent is 15:45:11:8:3, mixing gamma-aminopropyl triethoxysilane, methanol, saturated fatty acid glyceride, ethylene glycol tertiary butyl ether and water, and filtering to obtain the aminosilane coupling agent modified glass fiber; adding the modified glass fiber into a mixed solution of methanol and 28% ammonia water, wherein the mass ratio of the aminosilane coupling agent to the modified glass fiber to the methanol to the ammonia water is 1:75:5, a step of; heating to 70 ℃ for reaction for 1h, regulating the pH to be neutral, and then distilling under reduced pressure to remove methanol to obtain aminosilane oligomer modified glass fiber;
(2) Dispersing aminosilane oligomer modified glass fiber in water, and adding calcium lignosulfonate, glutaraldehyde and diethylenetriamine, wherein the mass volume ratio of the aminosilane oligomer modified glass fiber to the calcium lignosulfonate to the glutaraldehyde to the diethylenetriamine is 3g:1g:8mL:1mL, heating to 75 ℃ and reacting for 3h; and after the reaction is finished, filtering, washing and drying are sequentially carried out to obtain the modified glass fiber.
The preparation method of the facing base paper with the controllable expansion rate comprises the following steps:
s1: mixing the softwood pulp fibers and the modified glass fibers, pulping for 35min, controlling the pulping degree to be 32 DEG SR, adjusting the pH value of the slurry to be neutral, and adding the polyethylene oxide resin and the aqueous polyurethane to uniformly mix to obtain the slurry for later use;
s2: and (3) dehydrating, squeezing and drying the slurry obtained in the step (S1) to obtain the facing base paper.
Example 3
The facing base paper with controllable expansion rate is prepared from the following raw materials in parts by weight: 130 parts of softwood pulp fiber, 15 parts of modified glass fiber, 1 part of polyethylene oxide resin and 5 parts of waterborne polyurethane.
The preparation method of the modified glass fiber comprises the following steps:
(1) Placing the glass fiber into a sizing agent for normal temperature treatment for 6 hours, wherein the mass ratio of the sizing agent is 15:42:9:5:3, mixing gamma-aminopropyl triethoxysilane, methanol, saturated fatty acid glyceride, ethylene glycol tertiary butyl ether and water, and filtering to obtain the aminosilane coupling agent modified glass fiber; adding the modified glass fiber into a mixed solution of methanol and 28% ammonia water, wherein the mass ratio of the aminosilane coupling agent to the modified glass fiber to the methanol to the ammonia water is 1:60:3, a step of; heating to 55 ℃ for reaction for 2 hours, regulating the pH to be neutral, and then distilling under reduced pressure to remove methanol to obtain aminosilane oligomer modified glass fiber;
(2) Dispersing aminosilane oligomer modified glass fiber in water, and adding calcium lignosulfonate, glutaraldehyde and diethylenetriamine, wherein the mass volume ratio of the aminosilane oligomer modified glass fiber to the calcium lignosulfonate to the glutaraldehyde to the diethylenetriamine is 3g:0.8g:7mL:1mL, heating to 75 ℃ and reacting for 3h; and after the reaction is finished, filtering, washing and drying are sequentially carried out to obtain the modified glass fiber.
The preparation method of the facing base paper with the controllable expansion rate comprises the following steps:
s1: mixing and pulping softwood pulp fibers and modified glass fibers for 40min, controlling the pulping degree to be 30 DEG SR, adjusting the pH value of the slurry to be neutral, and adding polyethylene oxide resin and aqueous polyurethane to be uniformly mixed to obtain the slurry for later use;
s2: and (3) dehydrating, squeezing and drying the slurry obtained in the step (S1) to obtain the facing base paper.
Comparative example 1
The difference from example 1 is that: the modified glass fiber is not grafted by calcium lignosulfonate.
The facing base paper with controllable expansion rate is prepared from the following raw materials in parts by weight: 140 parts of softwood pulp fiber, 15 parts of modified glass fiber, 1 part of polyethylene oxide resin and 5 parts of waterborne polyurethane.
The preparation method of the modified glass fiber comprises the following steps:
placing the glass fiber into a sizing agent for normal temperature treatment for 6 hours, wherein the mass ratio of the sizing agent is 15:42:9:5:3, mixing gamma-aminopropyl triethoxysilane, methanol, saturated fatty acid glyceride, ethylene glycol tertiary butyl ether and water, and filtering to obtain the aminosilane coupling agent modified glass fiber; adding the modified glass fiber into a mixed solution of methanol and 28% ammonia water, wherein the mass ratio of the aminosilane coupling agent to the modified glass fiber to the methanol to the ammonia water is 1:60:3, a step of; heating to 55 ℃ for reaction for 2 hours, regulating the pH value to be neutral, and then distilling under reduced pressure to remove methanol to obtain the modified glass fiber
The preparation method of the facing base paper with the controllable expansion rate comprises the following steps:
s1: mixing the softwood pulp fibers and the modified glass fibers, pulping for 35min, controlling the pulping degree to be 32 DEG SR, adjusting the pH value of the slurry to be neutral, and adding the polyethylene oxide resin and the aqueous polyurethane to uniformly mix to obtain the slurry for later use;
s2: and (3) dehydrating, squeezing and drying the slurry obtained in the step (S1) to obtain the facing base paper.
Comparative example 2
The difference from example 1 is that: no ethylene glycol tertiary butyl ether is added into the impregnating compound.
The facing base paper with controllable expansion rate is prepared from the following raw materials in parts by weight: 140 parts of softwood pulp fiber, 15 parts of modified glass fiber, 1 part of polyethylene oxide resin and 5 parts of waterborne polyurethane.
The preparation method of the modified glass fiber comprises the following steps:
(1) Placing the glass fiber into a sizing agent for normal temperature treatment for 6 hours, wherein the mass ratio of the sizing agent is 15:42:9:3, mixing gamma-aminopropyl triethoxysilane, methanol, saturated fatty acid glyceride and water, and filtering to obtain the aminosilane coupling agent modified glass fiber; adding the modified glass fiber into a mixed solution of methanol and 28% ammonia water, wherein the mass ratio of the aminosilane coupling agent to the modified glass fiber to the methanol to the ammonia water is 1:60:3, a step of; heating to 55 ℃ for reaction for 2 hours, regulating the pH to be neutral, and then distilling under reduced pressure to remove methanol to obtain aminosilane oligomer modified glass fiber;
(2) Dispersing aminosilane oligomer modified glass fiber in water, and adding calcium lignosulfonate, glutaraldehyde and diethylenetriamine, wherein the mass volume ratio of the aminosilane oligomer modified glass fiber to the calcium lignosulfonate to the glutaraldehyde to the diethylenetriamine is 3g:0.8g:7mL:1mL, heating to 75 ℃ and reacting for 3h; and after the reaction is finished, filtering, washing and drying are sequentially carried out to obtain the modified glass fiber.
The preparation method of the facing base paper with the controllable expansion rate comprises the following steps:
s1: mixing the softwood pulp fibers and the modified glass fibers, pulping for 35min, controlling the pulping degree to be 32 DEG SR, adjusting the pH value of the slurry to be neutral, and adding the polyethylene oxide resin and the aqueous polyurethane to uniformly mix to obtain the slurry for later use;
s2: and (3) dehydrating, squeezing and drying the slurry obtained in the step (S1) to obtain the facing base paper.
Comparative example 3
The difference from example 1 is that: in the preparation process of the modified glass fiber, the adding amount of methanol is excessive when methanol is added for the first time.
The facing base paper with controllable expansion rate is prepared from the following raw materials in parts by weight: 140 parts of softwood pulp fiber, 15 parts of modified glass fiber, 1 part of polyethylene oxide resin and 5 parts of waterborne polyurethane.
The preparation method of the modified glass fiber comprises the following steps:
(1) Placing the glass fiber into a sizing agent for normal temperature treatment for 6 hours, wherein the mass ratio of the sizing agent is 15:65:9:5:3, mixing gamma-aminopropyl triethoxysilane, methanol, saturated fatty acid glyceride, ethylene glycol tertiary butyl ether and water, and filtering to obtain the aminosilane coupling agent modified glass fiber; adding the modified glass fiber into a mixed solution of methanol and 28% ammonia water, wherein the mass ratio of the aminosilane coupling agent to the modified glass fiber to the methanol to the ammonia water is 1:60:3, a step of; heating to 55 ℃ for reaction for 2 hours, regulating the pH to be neutral, and then distilling under reduced pressure to remove methanol to obtain aminosilane oligomer modified glass fiber;
(2) Dispersing aminosilane oligomer modified glass fiber in water, and adding calcium lignosulfonate, glutaraldehyde and diethylenetriamine, wherein the mass volume ratio of the aminosilane oligomer modified glass fiber to the calcium lignosulfonate to the glutaraldehyde to the diethylenetriamine is 3g:0.8g:7mL:1mL, heating to 75 ℃ and reacting for 3h; and after the reaction is finished, filtering, washing and drying are sequentially carried out to obtain the modified glass fiber.
The preparation method of the facing base paper with the controllable expansion rate comprises the following steps:
s1: mixing the softwood pulp fibers and the modified glass fibers, pulping for 35min, controlling the pulping degree to be 32 DEG SR, adjusting the pH value of the slurry to be neutral, and adding the polyethylene oxide resin and the aqueous polyurethane to uniformly mix to obtain the slurry for later use;
s2: and (3) dehydrating, squeezing and drying the slurry obtained in the step (S1) to obtain the facing base paper.
Comparative example 4
The difference from example 1 is that: in the preparation process of the modified glass fiber, the addition amount of ammonia water is excessive.
The facing base paper with controllable expansion rate is prepared from the following raw materials in parts by weight: 140 parts of softwood pulp fiber, 15 parts of modified glass fiber, 1 part of polyethylene oxide resin and 5 parts of waterborne polyurethane.
The preparation method of the modified glass fiber comprises the following steps:
(1) Placing the glass fiber into a sizing agent for normal temperature treatment for 6 hours, wherein the mass ratio of the sizing agent is 15:42:9:5:3, mixing gamma-aminopropyl triethoxysilane, methanol, saturated fatty acid glyceride, ethylene glycol tertiary butyl ether and water, and filtering to obtain the aminosilane coupling agent modified glass fiber; adding the modified glass fiber into a mixed solution of methanol and 28% ammonia water, wherein the mass ratio of the aminosilane coupling agent to the modified glass fiber to the methanol to the ammonia water is 1:60:12; heating to 55 ℃ for reaction for 2 hours, regulating the pH to be neutral, and then distilling under reduced pressure to remove methanol to obtain aminosilane oligomer modified glass fiber;
(2) Dispersing aminosilane oligomer modified glass fiber in water, and adding calcium lignosulfonate, glutaraldehyde and diethylenetriamine, wherein the mass volume ratio of the aminosilane oligomer modified glass fiber to the calcium lignosulfonate to the glutaraldehyde to the diethylenetriamine is 3g:0.8g:7mL:1mL, heating to 75 ℃ and reacting for 3h; and after the reaction is finished, filtering, washing and drying are sequentially carried out to obtain the modified glass fiber.
The preparation method of the facing base paper with the controllable expansion rate comprises the following steps:
s1: mixing the softwood pulp fibers and the modified glass fibers, pulping for 35min, controlling the pulping degree to be 32 DEG SR, adjusting the pH value of the slurry to be neutral, and adding the polyethylene oxide resin and the aqueous polyurethane to uniformly mix to obtain the slurry for later use;
s2: and (3) dehydrating, squeezing and drying the slurry obtained in the step (S1) to obtain the facing base paper.
Performance testing
Samples of 220mm by 220mm were uniformly taken on the facing base paper prepared in each of the examples and comparative examples for testing, and the longitudinal and transverse directions of the samples were distinguished. The sample is hung in the atmosphere with standard temperature and humidity to be processed to be balanced, then two straight lines which are parallel to the edges of the sample and are perpendicular to each other are drawn through the center of the sample, a mark is made at the position 10mm away from each edge of the sample at the two ends of the straight lines, and the distance between the two opposite marks is 200mm measured by a vernier caliper.
Expansion and contraction rate of moisture absorption: soaking the sample in water at the same temperature as ambient air for 15 min, spreading on a flat plate, measuring the distance between two marks with vernier caliper, and calculating as L 1 Cross sum L 1 And (3) longitudinally.
Thermal expansion ratio: the sample is put into a baking oven with the temperature of 200 ℃ for 2min, taken out, and the distance between two marks is measured by a vernier caliper to be L 2 Cross sum L 2 And (3) longitudinally.
The facing base paper transverse and longitudinal retractile ratio, stindulgent, was calculated according to the following formula:
s transverse = | L transverse-200| 200×100%; s longitudinal = | L longitudinal-200 = 200 x 100%.
TABLE 1
As shown in table 1, the facing base paper of the present invention has high dimensional stability, and has low expansion and contraction rate due to moisture absorption and low thermal expansion and contraction rate. By combining example 1 and comparative example 1, it is known that calcium lignosulfonate has good adsorption and dispersion and binding effects, can improve dispersion and binding properties of glass fibers, and can also destroy moisture in the internal structure of wood pulp fibers by virtue of acid functional groups thereof, thereby reducing the expansion and contraction rate of base paper. In combination with examples 1 and comparative examples 2 to 3, it was found that the preliminary silane coupling agent underwent a severe self-polymerization reaction without adding ethylene glycol t-butyl ether; in addition, the ratio of methanol to water affects the rate of hydrolysis, which is too fast to induce self-polymerization. Too fast self-polymerization reaction can generate agglomeration or precipitation, which is unfavorable for coupling and combining the silane coupling agent on the surface of the glass fiber, and is unfavorable for dispersion uniformity, thereby influencing the expansion and contraction performance of the base paper. In combination with example 1 and comparative example 4, the subsequent self-polymerization reaction of the silane coupling agent also needs to control the reaction degree, ensure moderate hydroxyl groups, facilitate the dispersion uniformity of the glass fibers, prevent the self-polymerization from forming a gel state, ensure that the amino-terminal functional groups can be effectively crosslinked with calcium lignosulfonate, and finally ensure that the base paper has high dimensional stability.
The raw materials and equipment used in the invention are common raw materials and equipment in the field unless specified otherwise; the methods used in the present invention are conventional in the art unless otherwise specified.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any simple modification, variation and equivalent transformation of the above embodiment according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (7)
1. The facing base paper with the controllable expansion rate is characterized by being prepared from the following raw materials in parts by weight: 120-150 parts of softwood pulp fiber, 10-25 parts of modified glass fiber and 1-10 parts of auxiliary agent; the modified glass fiber is an aminosilane oligomer modified glass fiber grafted by calcium lignosulfonate;
the preparation method of the modified glass fiber comprises the following steps:
(1) Placing the glass fiber into a sizing agent, and treating for 4-8 hours at normal temperature, wherein the sizing agent comprises the following components in percentage by mass: 35-50: 6-14: 3-8: 1-5 parts of an aminosilane coupling agent, methanol, saturated fatty acid glyceride, ethylene glycol tertiary butyl ether and water, and filtering and taking out to obtain an aminosilane coupling agent modified glass fiber; adding the amino silane oligomer modified glass fiber into a mixed solution of methanol and ammonia water, heating to 50-70 ℃ for reaction for 1-2 hours, adjusting pH to be neutral, and then removing the methanol by reduced pressure distillation to obtain the amino silane oligomer modified glass fiber;
(2) Dispersing aminosilane oligomer modified glass fibers in water, adding calcium lignosulfonate, glutaraldehyde and diethylenetriamine, heating to 60-80 ℃ and reacting for 2-4 hours; after the reaction is finished, filtering, washing and drying are sequentially carried out to obtain modified glass fibers;
the mass ratio of the aminosilane coupling agent modified glass fiber to the methanol to the ammonia water is 1: 50-80: 2-5.
2. The controlled-shrinkage base facing paper of claim 1, wherein the auxiliary agents comprise a pulp dispersant and a water and moisture resistant agent.
3. The controlled-shrinkage base facing paper of claim 2, wherein the pulp dispersant is one or more of a polyethylene oxide resin and an anionic polyacrylamide resin.
4. The controlled-shrinkage base facing paper of claim 2, wherein the water-resistant moisture-resistant agent is one or more of aqueous polyurethane, silicone emulsion, stearic acid gum, and EVA resin.
5. The controlled-elongation facing base paper of claim 1, wherein in step (1), the concentration of the aqueous ammonia is 25-30%.
6. The controlled-shrinkage faced raw paper of claim 1, wherein in the step (2), the mass-volume ratio of the aminosilane oligomer-modified glass fiber to the calcium lignosulfonate to the glutaraldehyde to the diethylenetriamine is 2-5 g: 0.5-2 g: 5-10 mL: 1-2 mL.
7. A method of making a controlled-stretch faced raw paper as claimed in any one of claims 1 to 6, comprising the steps of:
s1: mixing the softwood pulp fibers and the modified glass fibers, pulping for 20-40 min, controlling the pulping degree to be 28-35 DEG SR, adjusting the pH value of the slurry to be neutral, and adding an auxiliary agent to mix to obtain the slurry for later use;
s2: and (3) dehydrating, squeezing and drying the slurry obtained in the step (S1) to obtain the facing base paper.
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Denomination of invention: A controllable expansion rate decorative base paper and its preparation method Effective date of registration: 20231115 Granted publication date: 20230516 Pledgee: Zhejiang Tailong commercial bank Quzhou branch of Limited by Share Ltd. Pledgor: ZHEJIANG KINGDECOR PAPER INDUSTRY CO.,LTD. Registration number: Y2023980065540 |