CN116497634A - Manufacturing process of water-based formaldehyde-free wood grain paper - Google Patents
Manufacturing process of water-based formaldehyde-free wood grain paper Download PDFInfo
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- CN116497634A CN116497634A CN202310555116.0A CN202310555116A CN116497634A CN 116497634 A CN116497634 A CN 116497634A CN 202310555116 A CN202310555116 A CN 202310555116A CN 116497634 A CN116497634 A CN 116497634A
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- paper
- wood grain
- water
- roller coating
- coating
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- 239000002023 wood Substances 0.000 title claims abstract description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000007761 roller coating Methods 0.000 claims abstract description 55
- 229920005749 polyurethane resin Polymers 0.000 claims abstract description 34
- 238000000576 coating method Methods 0.000 claims abstract description 28
- 238000001035 drying Methods 0.000 claims abstract description 28
- 239000011248 coating agent Substances 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 238000007598 dipping method Methods 0.000 claims abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 12
- 238000005520 cutting process Methods 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 238000012856 packing Methods 0.000 claims abstract description 5
- 239000002952 polymeric resin Substances 0.000 claims abstract description 5
- 238000007790 scraping Methods 0.000 claims abstract description 5
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 5
- 239000000123 paper Substances 0.000 claims description 97
- 238000000034 method Methods 0.000 claims description 26
- 239000003795 chemical substances by application Substances 0.000 claims description 23
- 238000005470 impregnation Methods 0.000 claims description 22
- NOWKCMXCCJGMRR-UHFFFAOYSA-N Aziridine Chemical compound C1CN1 NOWKCMXCCJGMRR-UHFFFAOYSA-N 0.000 claims description 11
- 229920005989 resin Polymers 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 8
- 239000003431 cross linking reagent Substances 0.000 claims description 7
- 239000003973 paint Substances 0.000 claims description 7
- 239000003086 colorant Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 claims description 5
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims description 5
- 238000007731 hot pressing Methods 0.000 claims description 3
- 229920005668 polycarbonate resin Polymers 0.000 claims description 3
- 239000004431 polycarbonate resin Substances 0.000 claims description 3
- 239000010410 layer Substances 0.000 abstract description 27
- 238000004806 packaging method and process Methods 0.000 abstract description 8
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000002791 soaking Methods 0.000 abstract description 2
- 239000011247 coating layer Substances 0.000 abstract 1
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 12
- 238000002360 preparation method Methods 0.000 description 9
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- 238000002156 mixing Methods 0.000 description 7
- 239000002313 adhesive film Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 239000000758 substrate Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000002344 surface layer Substances 0.000 description 4
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229920000877 Melamine resin Polymers 0.000 description 2
- 239000004640 Melamine resin Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 239000011094 fiberboard Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000011120 plywood Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000013538 functional additive Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010998 test method Methods 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
- D21H27/22—Structures being applied on the surface by special manufacturing processes, e.g. in presses
- D21H27/26—Structures being applied on the surface by special manufacturing processes, e.g. in presses characterised by the overlay sheet or the top layers of the structures
- D21H27/28—Structures being applied on the surface by special manufacturing processes, e.g. in presses characterised by the overlay sheet or the top layers of the structures treated to obtain specific resistance properties, e.g. against wear or weather
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44F—SPECIAL DESIGNS OR PICTURES
- B44F9/00—Designs imitating natural patterns
- B44F9/02—Designs imitating natural patterns wood grain effects
-
- 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
- D21H17/07—Nitrogen-containing 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
- 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/60—Waxes
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
-
- 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
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/16—Sizing or water-repelling agents
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/70—Multistep processes; Apparatus for adding one or several substances in portions or in various ways to the paper, not covered by another single group of this main group
- D21H23/72—Plural serial stages only
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paints Or Removers (AREA)
- Paper (AREA)
Abstract
The invention discloses a manufacturing process of water-based formaldehyde-free wood grain paper, which comprises a base paper layer, an impregnating layer and a roller coating layer; the manufacturing process comprises the following steps: unreeling, impregnating, strickling, drying, primary roller coating, drying, secondary roller coating, drying, cooling, slitting and packaging; the base paper enters a dipping tank filled with dipping liquid through an unreeling machine and stays for 8-10 seconds to obtain paper with the dipping layer; scraping redundant soaking liquid and drying; the mixture enters a first roller coater for one-time roller coating and drying; then the paper enters a second roller coater to carry out secondary roller coating and drying, so as to obtain paper with a roller coating; cooling in a cooler, cutting and packing to obtain aldehyde-free wood grain paper; the impregnating solution is a coating containing aqueous polyurethane resin; the roller coating liquid is a coating containing water-based carbon polymer resin and water-based polyurethane resin. The invention can obtain the plate with the functions of wear resistance, scratch resistance, water resistance and stain resistance; no peculiar smell, no volatile matter, stability, environmental protection, convenience and practicability.
Description
Technical Field
The invention relates to the technical field of environment-friendly materials for decoration, in particular to a manufacturing process of water-based formaldehyde-free wood grain paper.
Background
Most of the existing furniture and cabinet industries adopt medium-density fiber boards and particle boards as base materials, and the medium-density fiber boards and particle boards in the base materials are bonded with a large amount of adhesives through simple facing or simple surface paint treatment, if the quality of the national standard is required to be achieved, a sufficient amount of adhesives are required to be ensured, at present, more than 95% of manufacturers in China select adhesives with low price and formaldehyde, and a large amount of adhesives are required to be supposed to have a large amount of formaldehyde; most furniture and products manufactured in the industry are treated by paint on the surfaces, and the paint which is not environment-friendly can cause secondary pollution to the veneer.
It is known that when plywood and woodworking boards are made, the formaldehyde content is low with a small amount of adhesive, thereby truly achieving an environment-friendly substrate. The invention patent with the application number of CN200910098824.6 discloses a paint-free wear-resistant veneer and a preparation process thereof, wherein the paint-free wear-resistant veneer comprises a substrate layer, one surface of the substrate layer is attached with a first surface layer, the first surface layer is first adhesive film base paper, and the first adhesive film base paper is sprayed with a first alumina layer which is dried and solidified to form first adhesive film paper. The other surface of the substrate layer is adhered with a second surface layer, the second surface layer is second adhesive film base paper which is formed by soaking decorative paper with natural wood grain colors and natural plain colors in a pattern and series through melamine resin adhesive, and the second adhesive film base paper is sprayed with a second alumina layer which is dried and solidified to form the second adhesive film paper. The substrate layer is a plywood layer with a smooth surface through fixed thickness sanding or a woodworking board layer with a smooth surface through fixed thickness sanding.
However, due to the instability of melamine resin adhesives, formaldehyde can be continuously decomposed under certain conditions (even if EO grade is reached, formaldehyde is not completely contained), and the environment of life is polluted, so that the late-stage extension injury is brought to consumers.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a manufacturing process of water-based formaldehyde-free wood grain paper, which comprises the steps of impregnating paper with water-based polyurethane hot-melt resin, blending proper amounts of wear-resistant agent, waterproof agent and curing agent with water-based polycarbonate resin and water-based polyurethane resin, uniformly coating the front surface of the impregnated wood grain paper, drying, cutting and packaging, and finally carrying out hot pressing with a wood board to obtain a board with the functions of wear resistance, scratch resistance, water resistance and stain resistance; no peculiar smell, no volatile matter, stability, environmental protection, convenience and practicability.
The technical scheme adopted for solving the technical problems is as follows: the process for manufacturing the water-based formaldehyde-free wood grain paper comprises a base paper layer, impregnation layers combined on two side surfaces of the base paper layer, and a roller coating combined on the upper surface of one impregnation layer; the manufacturing process of the wood grain paper mainly comprises unreeling, impregnation, strickling, drying, primary roller coating, drying, secondary roller coating, drying, cooling, slitting and packing; feeding the base paper layer printed with wood grain colors into a dipping tank filled with dipping liquid through an unreeling machine, and staying in the dipping tank for 8-10 seconds to obtain paper with the dipping layer; scraping redundant impregnation liquid on the surface of the paper, and then introducing the paper into an oven for drying; the paper with the impregnated layer after drying enters a first roller coater to be rolled once, and is dried after being rolled once; then the paper enters a second roller coater to carry out secondary roller coating, and the paper is dried after the secondary roller coating to obtain paper with a roller coating; then cooling in a cooler, cutting and packing to obtain aldehyde-free wood grain paper; the impregnation liquid is aqueous polyurethane resin paint; the roller coating liquid adopted in the primary roller coating and the secondary roller coating is water-based carbon polymer resin and water-based polyurethane resin coating.
Further, the aqueous polyurethane resin coating comprises, by weight, 80-90 parts of aqueous polyurethane resin, 5-8 parts of wax anti-sticking agent, 2-3 parts of aziridine crosslinking agent and 20-30 parts of water.
Furthermore, the particle size of the aqueous polyurethane resin in the aqueous polyurethane resin coating is within 100 mu m, the molecular weight of the aqueous polyurethane resin coating is not more than 1 ten thousand, and the polyurethane with smaller molecular weight is favorable for infiltration in the impregnation process.
Further, the composition of the aqueous carbon resin and the aqueous polyurethane resin coating comprises, by weight, 20-40 parts of the aqueous carbon resin, 80-60 parts of the aqueous polyurethane resin, 5-10 parts of the silicon aluminum wear-resistant agent, 10-20 parts of the fluorocarbon waterproof agent, 1-3 parts of the aziridine curing agent and 10-20 parts of water.
Furthermore, the particle size of the aqueous polyurethane resin in the aqueous carbon resin and aqueous polyurethane resin paint is more than 300 mu m, the molecular weight is more than 2-3 ten thousand, and polyurethane with larger molecular weight is beneficial to surface coating film formation.
Further, in the one-time roller coating process, the temperature is set to be 80-90 ℃, the speed is 8-12 m/min, and the number of the feeding rollers is adjusted to enable the coating amount to reach 90-110 g/m 2 The paper uniformly passes through; in the secondary roller coating process, the temperature is set to be 80-90 ℃, the speed is 8-12 m/min, and the number of the feeding rollers is adjusted to ensure that the coating amount reaches 70-90 g/m 2 The paper passes uniformly.
Further, the thickness of the roller coating ranges from 0.1 mm to 0.3mm; the whole thickness range of the wood grain paper is 0.8-1.2 mm; the density of the wood grain paper is 70-80 g/m 2 。
Further, the manufactured wood grain paper is bonded on a density board or a wood board in a hot pressing way at the temperature of 140-160 ℃; when the wood grain paper is attached, the surface without the roller coating is combined with the density board or the wood board.
The beneficial effects of the invention are as follows: compared with the prior art, the preparation process of the water-based formaldehyde-free wood grain paper provided by the invention has the advantages that firstly, the water-based polyurethane resin is used for impregnation treatment, so that the paper is more compact, more resistant to folding, bending and tearing, and on the other hand, the wood grain paper can be firmly attached to a wood board during hot-attaching; the aqueous polyurethane resin, the aqueous polyurethane resin and some functional additives are used for preparing a coating, the coating is coated on the surface of the impregnated paper by a roller, and the roller is coated for two times, so that the coating is more uniform, and the aqueous formaldehyde-free wood grain paper with the functions of wear resistance, scratch resistance, water resistance and stain resistance, no peculiar smell or volatile matter, stable performance, convenience and practicability is obtained; the addition of the water-based carbon polymer resin ensures that the wood grain paper has better wear resistance.
And then the wood grain paper is thermally adhered to a density board or a wood board according to the actual use requirement, so that the board with a certain function can be obtained. The water-based carbon polymer resin and the water-based polyurethane resin have the advantages of stable structure, heat resistance, light resistance, stable performance, no peculiar smell and volatile matters, simple construction and high speed, and can save materials and labor. An aziridine crosslinking agent is selected, and the crosslinking agent has three functional groups, and has good crosslinking effect, high crosslinking speed and convenient operation.
Drawings
Fig. 1 is a flow chart of a manufacturing process provided by the invention.
Fig. 2 is a schematic cross-sectional structure of the wood grain paper according to the present invention.
Wherein, 1-roller coating; 2-an impregnation layer; 3-base paper base layer.
Detailed Description
The invention is further illustrated by the following specific examples. These examples are merely illustrative of the invention and are not intended to limit the scope of the invention.
Example 1
1) Preparation of the impregnation liquid:
the weight ratio is as follows: 80 parts of aqueous polyurethane resin, 5 parts of wax anti-sticking agent, 2 parts of aziridine crosslinking agent and 25 parts of water; mixing uniformly for later use.
2) Preparation of a roller coating liquid:
the weight ratio is as follows: 20 parts of water-based carbon resin, 80 parts of water-based polyurethane resin, 8 parts of silicon-aluminum wear-resistant agent, 15 parts of fluorocarbon waterproof agent, 2 parts of aziridine curing agent and 15 parts of water; mixing uniformly for later use.
The manufacturing process of the wood grain paper mainly comprises the following steps: unreeling, impregnating, strickling, drying, primary roller coating, drying, secondary roller coating, drying, cooling, slitting and packaging; the base paper base layer printed with the designs and colors passes through the unreeling machineAfter entering a gum dipping tank filled with impregnation liquid and staying for 8-10 seconds, obtaining paper with an impregnation layer; scraping redundant impregnation liquid on the surface of the paper, and then introducing the paper into an oven for drying; the paper with the impregnated layer after drying enters a first roller coater to be rolled once, and is dried after being rolled once; in the one-time roller coating process, the temperature is set to 90 ℃, the speed is 9 m/min, and the number of the feeding rollers is adjusted to ensure that the coating amount reaches 100 g/m 2 The paper passes uniformly. Then the mixture enters a second roller coater to carry out secondary roller coating, and the mixture is dried after the secondary roller coating, wherein in the secondary roller coating process, the temperature is set to 85 ℃, the speed is 10 m/min, and the number of feed rollers is regulated to ensure that the coating amount reaches 80 g/m 2 The paper passes uniformly. And (3) obtaining paper with a roller coating, cooling in a cooler, cutting, and packaging to obtain the aldehyde-free wood grain paper. The wood grain paper is thermally adhered to a density board or a wood board at 150 ℃ to obtain the required board.
Example 2
1) Preparation of the impregnation liquid:
the weight ratio is as follows: 85 parts of aqueous polyurethane resin, 6 parts of wax anti-sticking agent, 2 parts of aziridine crosslinking agent and 20 parts of water; mixing uniformly for later use.
2) Preparation of a roller coating liquid:
the weight ratio is as follows: 30 parts of water-based carbon resin, 70 parts of water-based polyurethane resin, 8 parts of silicon-aluminum wear-resistant agent, 15 parts of fluorocarbon waterproof agent, 2 parts of aziridine curing agent and 15 parts of water; mixing uniformly for later use.
The process for making the wood grain paper is the same as in example 1.
Example 3
1) Preparation of the impregnation liquid:
the weight ratio is as follows: 90 parts of aqueous polyurethane resin, 8 parts of wax anti-sticking agent, 3 parts of aziridine crosslinking agent and 30 parts of water; mixing uniformly for later use.
2) Preparation of a roller coating liquid:
the weight ratio is as follows: 40 parts of water-based carbon resin, 60 parts of water-based polyurethane resin, 8 parts of silicon-aluminum wear-resistant agent, 15 parts of fluorocarbon waterproof agent, 2 parts of aziridine curing agent and 15 parts of water; mixing uniformly for later use.
The process for making the wood grain paper is the same as in example 1.
Comparative example 1 (comparative without impregnation diameter roll coating)
The roller coating liquid was prepared as in example 3.
The manufacturing process of the wood grain paper comprises the following steps: unreeling, primary roller coating, drying, secondary roller coating, drying, cooling, slitting and packaging; the base layer of the base paper with printed patterns enters a first roller coater to be rolled once, and is dried after being rolled once; in the one-time roller coating process, the temperature is set to 90 ℃, the speed is 9 m/min, and the number of the feeding rollers is adjusted to ensure that the coating amount reaches 100 g/m 2 The paper passes uniformly. Then the mixture enters a second roller coater to carry out secondary roller coating, and the mixture is dried after the secondary roller coating, wherein in the secondary roller coating process, the temperature is set to 85 ℃, the speed is 10 m/min, and the number of feed rollers is regulated to ensure that the coating amount reaches 80 g/m 2 The paper passes uniformly. And (3) obtaining paper with a roller coating, cooling in a cooler, cutting, and packaging to obtain the aldehyde-free wood grain paper. The wood grain paper is thermally adhered to a density board or a wood board at 150 ℃ to obtain the required board.
Comparative example 2 (comparative of impregnation + one roll coating)
The preparation of the infusion was the same as in example 3.
The roller coating liquid was prepared as in example 3.
The manufacturing process of the wood grain paper mainly comprises the following steps: unreeling, impregnating, strickling, drying, roller coating, drying, cooling, slitting and packaging; the base paper layer printed with the colors enters a dipping tank filled with dipping liquid through an unreeling machine to stay for 8-10 seconds, and then paper with the dipping layer is obtained; scraping redundant impregnation liquid on the surface of the paper, and then introducing the paper into an oven for drying; the paper with the impregnated layer after drying enters a roller coater to be rolled, and is dried after being rolled; in the roll coating process, the temperature is set to 90 ℃, the speed is 9 m/min, and the number of the feeding rollers is adjusted to ensure that the coating amount reaches 180 g/m 2 The paper passes uniformly. And (3) obtaining paper with a roller coating, cooling in a cooler, cutting, and packaging to obtain the aldehyde-free wood grain paper. The wood grain paper is thermally adhered to a density board or a wood board at 150 ℃ to obtain the required board.
The wood grain papers obtained in examples 1 to 3 and comparative examples 1 to 2 were subjected to the correlation property test, and the test items and test results are shown below.
Table 1, categories of Performance tests and specific test methods
Table 2, results of performance test of each example and comparative example
The above embodiments are only for illustrating the present invention, not for limiting the present invention, and various changes and modifications may be made by one of ordinary skill in the relevant art without departing from the spirit and scope of the present invention, and therefore, all equivalent technical solutions are also within the scope of the present invention, and the scope of the present invention is defined by the claims.
Claims (8)
1. A manufacturing process of water-based formaldehyde-free wood grain paper is characterized in that: the wood grain paper comprises a base paper layer, impregnation layers combined on the two side surfaces of the base paper layer, and a roller coating combined on the upper surface of one of the impregnation layers; the manufacturing process of the wood grain paper mainly comprises unreeling, impregnation, strickling, drying, primary roller coating, drying, secondary roller coating, drying, cooling, slitting and packing; feeding the base paper layer printed with wood grain colors into a dipping tank filled with dipping liquid through an unreeling machine, and staying in the dipping tank for 8-10 seconds to obtain paper with the dipping layer; scraping redundant impregnation liquid on the surface of the paper, and then introducing the paper into an oven for drying; the paper with the impregnated layer after drying enters a first roller coater to be rolled once, and is dried after being rolled once; then the paper enters a second roller coater to carry out secondary roller coating, and the paper is dried after the secondary roller coating to obtain paper with a roller coating; then cooling in a cooler, cutting and packing to obtain aldehyde-free wood grain paper; the impregnation liquid is aqueous polyurethane resin paint; the roller coating liquid adopted in the primary roller coating and the secondary roller coating is water-based carbon polymer resin and water-based polyurethane resin coating.
2. The process for making the water-based formaldehyde-free wood grain paper according to claim 1, wherein the process comprises the following steps of: the aqueous polyurethane resin coating comprises, by weight, 80-90 parts of aqueous polyurethane resin, 5-8 parts of wax anti-sticking agent, 2-3 parts of aziridine crosslinking agent and 20-30 parts of water.
3. The process for making the water-based formaldehyde-free wood grain paper according to claim 2, wherein the process comprises the following steps of: the particle size of the aqueous polyurethane resin in the aqueous polyurethane resin coating is within 100 mu m, and the molecular weight is not more than 1 ten thousand.
4. The process for making the water-based formaldehyde-free wood grain paper according to claim 1, wherein the process comprises the following steps of: the composition of the aqueous polycarbonate resin and the aqueous polyurethane resin coating comprises, by weight, 20-40 parts of aqueous polycarbonate resin, 80-60 parts of aqueous polyurethane resin, 5-10 parts of silicon-aluminum wear-resistant agent, 10-20 parts of fluorocarbon waterproof agent, 1-3 parts of aziridine curing agent and 10-20 parts of water.
5. The process for making the water-based formaldehyde-free wood grain paper according to claim 4, wherein the process comprises the following steps of: the particle size of the aqueous polyurethane resin in the aqueous carbon resin and aqueous polyurethane resin paint is more than 300 mu m, and the molecular weight is more than 2-3 ten thousand.
6. The process for making the water-based formaldehyde-free wood grain paper according to claim 1, wherein the process comprises the following steps of: in the one-time roller coating process, the temperature is set to be 80-90 ℃, the speed is 8-12 m/min, and the number of the feeding rollers is adjusted to ensure that the coating amount reaches 90-110 g/m 2 The paper uniformly passes through; in the secondary roller coating process, the temperature is set to be 80-90 ℃, the speed is 8-12 m/min, and the number of the feeding rollers is adjusted to ensure that the coating amount reaches 70-90 gRice/meter 2 The paper passes uniformly.
7. The process for making the water-based formaldehyde-free wood grain paper according to claim 1, wherein the process comprises the following steps of: the thickness range of the roller coating is 0.1-0.3 mm; the whole thickness range of the wood grain paper is 0.8-1.2 mm; the density of the wood grain paper is 70-80 g/m 2 。
8. The process for making the water-based formaldehyde-free wood grain paper according to claim 1, wherein the process comprises the following steps of: the manufactured wood grain paper is bonded on a density board or a wood board in a hot pressing way at the temperature of 140-160 ℃; when the wood grain paper is attached, the surface without the roller coating is combined with the density board or the wood board.
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| CN202310555116.0A CN116497634A (en) | 2023-05-17 | 2023-05-17 | Manufacturing process of water-based formaldehyde-free wood grain paper |
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| CN202310555116.0A CN116497634A (en) | 2023-05-17 | 2023-05-17 | Manufacturing process of water-based formaldehyde-free wood grain paper |
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