CN116397457A - Plastic-free paper coating process - Google Patents
Plastic-free paper coating process Download PDFInfo
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- CN116397457A CN116397457A CN202310157756.6A CN202310157756A CN116397457A CN 116397457 A CN116397457 A CN 116397457A CN 202310157756 A CN202310157756 A CN 202310157756A CN 116397457 A CN116397457 A CN 116397457A
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- 238000000576 coating method Methods 0.000 title claims abstract description 129
- 239000011248 coating agent Substances 0.000 claims abstract description 111
- 238000001035 drying Methods 0.000 claims abstract description 34
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 33
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000004132 cross linking Methods 0.000 claims abstract description 22
- 239000000839 emulsion Substances 0.000 claims abstract description 22
- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000000243 solution Substances 0.000 claims abstract description 22
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 18
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229920001661 Chitosan Polymers 0.000 claims abstract description 11
- 239000007864 aqueous solution Substances 0.000 claims abstract description 11
- 125000006038 hexenyl group Chemical group 0.000 claims abstract description 11
- 235000010413 sodium alginate Nutrition 0.000 claims abstract description 11
- 229940005550 sodium alginate Drugs 0.000 claims abstract description 11
- 239000000661 sodium alginate Substances 0.000 claims abstract description 11
- 229940037312 stearamide Drugs 0.000 claims abstract description 11
- 239000002383 tung oil Substances 0.000 claims abstract description 11
- -1 acrylic ester Chemical class 0.000 claims abstract description 7
- 239000003973 paint Substances 0.000 claims abstract description 7
- 150000005846 sugar alcohols Polymers 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 30
- 238000010438 heat treatment Methods 0.000 claims description 29
- 239000004014 plasticizer Substances 0.000 claims description 17
- 229920005862 polyol Polymers 0.000 claims description 13
- 150000003077 polyols Chemical class 0.000 claims description 13
- 238000007790 scraping Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 230000007246 mechanism Effects 0.000 claims description 8
- 238000005096 rolling process Methods 0.000 claims description 8
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 7
- 239000011259 mixed solution Substances 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 6
- 238000004090 dissolution Methods 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 abstract description 5
- 239000005022 packaging material Substances 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract 1
- 231100000956 nontoxicity Toxicity 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 235000013305 food Nutrition 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002939 oilproofing Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 231100000693 bioaccumulation Toxicity 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical class FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 125000005010 perfluoroalkyl group Chemical group 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Images
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
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses a plastic-free paper coating process, and relates to the technical field of packaging materials. The method comprises the following steps: step one: preparing a plastic-free coating; step two: coating plastic-free paint on the upper surface of base paper through a coating device to obtain coated paper; step three: drying the coated paper obtained in the second step in a first drying box at a drying temperature of 60-75 ℃; step four: and (3) coating the dried coated paper in the step three with plastic-free coating again by a coating device. The invention adopts the hard self-crosslinking acrylic emulsion, the soft self-crosslinking acrylic emulsion, the hexenyl bis stearamide, the acrylic ester flatting agent, the polyalcohol, the plasticizing agent, the tung oil, the acetic acid solution of chitosan and the sodium alginate aqueous solution to prepare the plastic-free coating which is coated on the base paper, the plastic-free coating prepared from the raw materials has no toxicity, the prepared coating can be quickly adhered to the base paper after being coated on the base paper, the plastic-free paper can be quickly degraded, the pollution to the environment is reduced, and the environmental protection performance is good.
Description
Technical Field
The invention relates to the technical field of packaging materials, in particular to a plastic-free paper coating process.
Background
Paper packaging is one of the largest packaging materials used in the fields of catering, food, medical packaging, and the like. Paper packaging must possess water, oil and barrier properties due to contact with oily, greasy or watery foods.
In the patents CN104562684B and CN110791957B, fluorocarbon compounds are used. Although the water-and oil-proofing effect is excellent, the water-and oil-proofing agent is usually a polymer containing perfluoroalkyl groups, has the defects of strong bioaccumulation and difficult degradation, is particularly used for a long time in contact, has strong toxicity to human bodies, is particularly forbidden in the field of food packaging, has high production cost, and is not beneficial to popularization of products.
Disclosure of Invention
The present invention is directed to a plastic-free paper coating process to solve the above-mentioned problems.
In order to achieve the above purpose, the present invention provides the following technical solutions: the plastic-free paper coating process comprises the following steps:
step one: preparing a plastic-free coating;
step two: coating plastic-free paint on the upper surface of base paper through a coating device to obtain coated paper;
step three: drying the coated paper obtained in the second step in a first drying box at a drying temperature of 60-75 ℃;
step four: coating the dried coated paper in the third step with plastic-free coating again through a coating device;
step five: drying the coated paper obtained in the step four in a second drying box at 55-65 ℃;
step six: putting the coated paper subjected to the secondary drying in the fifth step into a drying cylinder for drying and polishing;
step seven: carrying out back coating shaping on the coated paper obtained in the step six;
step eight: winding;
step nine: and (5) cutting.
Further, the plastic-free coating comprises a first coating liquid and a second coating liquid, and the first coating liquid and the second coating liquid are respectively applied in the second step and the fourth step.
Furthermore, the first coating liquid consists of hard self-crosslinking acrylic emulsion, hexenyl bis stearamide, an acrylic ester leveling agent, polyalcohol, a plasticizing agent, an acetic acid solution of chitosan and an aqueous solution of sodium alginate, and is specifically prepared from the following components in parts by weight: 95-100 parts of hard self-crosslinking acrylic emulsion, 3-10 parts of hexenyl bis stearamide, 3-8 parts of acrylate leveling agent, 10-15 parts of polyol, 3-5 parts of plasticizer, 20-30 parts of acetic acid solution of chitosan and 20-30 parts of sodium alginate aqueous solution.
Further, the first coating liquid is characterized in that the preparation steps are as follows:
a1, mixing 96 parts of hard self-crosslinking acrylic emulsion, 5 parts of hexenyl bis stearamide, 5 parts of acrylate leveling agent, 12 parts of polyol and 3 parts of plasticizer according to the weight ratio, and stirring by a magnetic stirrer for 20-30 min;
a2, adding 22 parts of acetic acid solution of chitosan and 22 parts of sodium alginate aqueous solution into the mixed solution obtained in the A1, then placing the solution into a heating box, heating to 80-90 ℃, stirring for 20-30 min, placing into an electric furnace after dissolution, heating and drying for 60-70 min, wherein the heating temperature is 70-80 ℃, and the heating rate of the electric furnace is 15 ℃/min, so as to obtain the first coating solution of the product.
Further, the second coating liquid consists of soft self-crosslinking acrylic emulsion, tung oil, polyalcohol and plasticizer, and is specifically prepared from the following components in parts by weight: 95-100 parts of soft self-crosslinking acrylic emulsion, 5-10 parts of tung oil, 10-15 parts of polyol and 3-5 parts of plasticizer.
Further, the second coating liquid is prepared by the following steps:
a1, mixing 96 parts of soft self-crosslinking acrylic emulsion, 5 parts of tung oil, 5 parts of acrylic ester flatting agent, 12 parts of polyol and 3 parts of plasticizer according to the weight ratio, and stirring by a magnetic stirrer for 15-20 min;
a2, placing the mixed solution obtained in the step A1 into a heating box, heating to 70-80 ℃, stirring for 15-20 min, placing into an electric furnace, heating and drying for 60-70 min after dissolution, wherein the heating temperature is 70-80 ℃, and the heating speed of the electric furnace is 15 ℃/min, so as to obtain a second coating solution of the product.
Further, in the second step, the first coating liquid amount of the base paper coating is 3 g-4 g/square meter, and in the fourth step, the second coating liquid amount of the base paper coating on the top layer of the first coating liquid is 3 g-4 g/square meter.
Still further, the coating device includes two curb plates and coating roller, and the level is provided with first roller bearing and second roller bearing between the curb plate, is provided with between first roller bearing and the second roller bearing and compresses tightly the subassembly, compresses tightly the subassembly and includes two movable blocks, and the coating roller rolls and sets up between two movable blocks, and the top of second roller bearing is provided with the mechanism of scraping.
Still further, the coating device comprises a compressing assembly and a first fixing shaft, wherein the compressing assembly comprises a rectangular groove formed in the side face of the side plate, the first fixing shaft is fixed between the groove walls of the rectangular groove, the movable block is movably inserted with the first fixing shaft, and a first spring is fixed between the first fixing shaft and the bottom wall of the rectangular groove.
Still further, scrape even mechanism including fixing second fixed axle and the fixed plate between two curb plates, the fixed plate is located under the second fixed axle, swing joint has movable pipe on the axis body of second fixed axle, and the movable pipe both sides are provided with folded plate and scraper blade respectively, and the cavity has been seted up at folded plate middle part, and folded plate side is fixed with the air heater that is linked together with the cavity, and folded plate bottom fixed intercommunication has a plurality of air shower nozzles, is fixed with a plurality of torsion springs between scraper blade inner panel and the fixed plate.
Compared with the prior art, the invention has the beneficial effects that:
the plastic-free paper coating process adopts hard self-crosslinking acrylic emulsion, soft self-crosslinking acrylic emulsion, hexenyl bis stearamide, acrylate leveling agent, polyalcohol, plasticizer, tung oil, acetic acid solution of chitosan and sodium alginate aqueous solution to prepare plastic-free coating which is coated on base paper, the plastic-free coating prepared from the raw materials is nontoxic, the prepared coating can be quickly attached to the base paper after being coated on the base paper, the plastic-free paper can be quickly degraded, the pollution to the environment is reduced, the environmental protection performance is good, and the application range of the plastic-free paper is improved;
in addition, the plastic-free paper is coated for the second time through different raw materials and different raw material proportions, so that the compactness of the coating layer is improved, the effect of isolating water and oil is achieved, the water and the oil are mutually incompatible with the plastic-free paper, and the waterproof and oil-proof effects are achieved;
through the setting of coating device, can effectually improve the homogeneity of coating of plastic-free coating and the compactness of coating, avoid the side hourglass of inhomogeneous coating department that causes because of coating inhomogeneous or compactness is relatively poor.
Drawings
FIG. 1 is an axial view of a coating apparatus of the present invention;
FIG. 2 is an axial view of the coating apparatus of the present invention after removal of the base paper;
FIG. 3 is a semi-sectional view of a hold-down assembly in a coating apparatus of the present invention;
fig. 4 is a detailed view of the wiping mechanism in the coating device of the present invention.
In the figure: 1. a side plate; 2. a first roller; 4. a compression assembly; 401. a first fixed shaft; 402. a movable block; 403. a first spring; 5. a coating roller; 6. a scraping mechanism; 601. a second fixed shaft; 602. a movable tube; 603. a folded plate; 604. a gas shower head; 605. a fixing plate; 606. a torsion spring; 7. a base paper.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, in the description of the present invention, the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be understood that the dimensions of the various elements shown in the figures are not drawn to actual scale, e.g., the thickness or width of some layers may be exaggerated relative to other layers for ease of description.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined or illustrated in one figure, no further detailed discussion or description thereof will be necessary in the following description of the figures.
The invention provides a technical scheme that: a plastic-free paper coating process, as a specific example, comprising the steps of:
step one: preparing a plastic-free coating;
step two: coating plastic-free paint on the upper surface of base paper 7 by a coating device to obtain coated paper;
step three: drying the coated paper obtained in the second step in a first drying box at a drying temperature of 70 ℃;
step four: coating the dried coated paper in the third step with plastic-free coating again through a coating device;
step five: drying the coated paper obtained in the step four in a second drying box at a drying temperature of 60 ℃;
step six: putting the coated paper subjected to the secondary drying in the fifth step into a drying cylinder for drying and polishing;
step seven: carrying out back coating shaping on the coated paper obtained in the step six, so that the overall flatness of the plastic-free paper is improved, the glossiness of the coated paper is further improved, and the back coating material is aluminum foil paper or PP-PU film;
step eight: winding;
step nine: and (5) cutting.
In order to improve the coating effect and further improve the toughness, oil water resistance and flatness of the plastic-free paper, in the scheme, the plastic-free coating comprises a first coating liquid and a second coating liquid, wherein the first coating liquid and the second coating liquid are respectively applied in the second step and the fourth step.
The first coating liquid consists of hard self-crosslinking acrylic emulsion, hexenyl bis stearamide, an acrylic ester leveling agent, polyalcohol, a plasticizing agent, an acetic acid solution of chitosan and an aqueous solution of sodium alginate, and is specifically prepared from the following components in parts by weight: 95-100 parts of hard self-crosslinking acrylic emulsion, 3-10 parts of hexenyl bis stearamide, 3-8 parts of acrylate leveling agent, 10-15 parts of polyol, 3-5 parts of plasticizer, 20-30 parts of acetic acid solution of chitosan and 20-30 parts of sodium alginate aqueous solution.
It should be noted that the first coating liquid is prepared by the following steps:
a1, mixing 96 parts of hard self-crosslinking acrylic emulsion, 5 parts of hexenyl bis stearamide, 5 parts of acrylate leveling agent, 12 parts of polyol and 3 parts of plasticizer according to the weight ratio, and stirring by a magnetic stirrer for 25min;
a2, adding 22 parts of acetic acid solution of chitosan and 22 parts of sodium alginate aqueous solution into the mixed solution obtained in the step A1, then placing the solution into a heating box, heating to 85 ℃, stirring for 25min, placing the solution into an electric furnace for heating and drying for 60min after dissolution, wherein the heating temperature is 72 ℃, and the heating rate of the electric furnace is 15 ℃/min, so as to obtain the first coating solution of the product.
The second coating liquid consists of soft self-crosslinking acrylic emulsion, tung oil, polyalcohol and plasticizer, and is specifically prepared from the following components in parts by weight: 95-100 parts of soft self-crosslinking acrylic emulsion, 5-10 parts of tung oil, 10-15 parts of polyol and 3-5 parts of plasticizer.
It should be noted that the second coating liquid is prepared by the following steps:
a1, mixing 96 parts of soft self-crosslinking acrylic emulsion, 5 parts of tung oil, 5 parts of acrylic ester flatting agent, 12 parts of polyol and 3 parts of plasticizer according to the weight ratio, and stirring by a magnetic stirrer for 15min;
a2, placing the mixed solution obtained in the step A1 into a heating box to be heated to 72 ℃, stirring for 16min, placing the dissolved mixed solution into an electric furnace to be heated and dried for 65min, wherein the heating temperature is 75 ℃, and the heating rate of the electric furnace is 15 ℃/min, so as to obtain a second coating solution of the product.
In order to avoid the problem that excessive coating wastes raw materials and the problem that the overall physical properties of the plastic-free paper are affected due to the fact that the coating is too low, in the scheme, in the second step, the first coating liquid amount of the base paper 7 is 3.5 g/square meter, and in the fourth step, the second coating liquid amount of the base paper 7 is 3.5 g/square meter.
In order to effectively improve the coating uniformity and the compactness of a coating layer of the plastic-free coating and avoid side leakage of uneven coating positions caused by uneven coating or poor compactness, as shown in fig. 1-4, the coating device comprises two side plates 1 and a coating roller 5, the coating roller 5 is a hollow roller, a glue outlet hole is formed in a roller body, and the coating roller 5 is externally connected with a glue supply pump.
A first rolling shaft 2 and a second rolling shaft which are in rolling connection with the side plates 1 are horizontally arranged between the side plates 1, a pressing component 4 for pressing the base paper 7 is arranged between the first rolling shaft 2 and the second rolling shaft, the pressing component 4 comprises two movable blocks 402, a coating roller 5 is arranged between the two movable blocks 402 in a rolling manner, and a scraping mechanism 6 for heating, drying and scraping the coating is arranged at the top of the second rolling shaft.
As shown in fig. 2 and 3, the coating device includes a compressing assembly 4 including a rectangular slot formed on a side surface of the side plate 1, a first fixing shaft 401 is fixed between slot walls of the rectangular slot, a movable block 402 is movably inserted into the first fixing shaft 401, a first spring 403 is fixed between the first fixing shaft 401 and a bottom wall of the rectangular slot, and the first fixing shaft 401 is located in a spiral ring of the first spring 403.
The coating roller 5 rolls under the drive of the base paper 7, and the coating roller 5 always contacts with the base paper 7 under the action of the elasticity of the spring, so that the coating of the base paper 7 is realized.
In order to scrape the coating, as shown in fig. 1 and 4, the scraping mechanism 6 comprises a second fixing shaft 601 and a fixing plate 605 fixed between two side plates 1, the fixing plate 605 is located under the second fixing shaft 601, a movable pipe 602 is movably connected to a shaft body of the second fixing shaft 601, two sides of the movable pipe 602 are respectively provided with a folded plate 603 and a scraping plate, it can be known that a cavity is formed in the middle of the folded plate 603, a hot air blower (not shown in the drawing) communicated with the cavity is fixed on the side surface of the folded plate 603, a plurality of air spray nozzles 604 are fixedly communicated with the bottom end of the folded plate 603, hot air sprayed by the air spray nozzles 604 can accelerate curing of plastic-free paint, production efficiency is improved, and a plurality of torsion springs 606 are fixed between the inner side plate 1 of the scraping plate and the fixing plate 605.
When the coated base paper 7 moves through the second roller, the bottom end of the scraping plate always contacts with the top paper surface of the base paper 7 under the action of the elasticity of the torsion spring 606, so that the plastic-free paint is scraped uniformly.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The plastic-free paper coating process is characterized by comprising the following steps of:
step one: preparing a plastic-free coating;
step two: coating plastic-free paint on the upper surface of base paper through a coating device to obtain coated paper;
step three: drying the coated paper obtained in the second step in a first drying box at a drying temperature of 60-75 ℃;
step four: coating the dried coated paper in the third step with plastic-free coating again through a coating device;
step five: drying the coated paper obtained in the step four in a second drying box at 55-65 ℃;
step six: putting the coated paper subjected to the secondary drying in the fifth step into a drying cylinder for drying and polishing;
step seven: carrying out back coating shaping on the coated paper obtained in the step six;
step eight: winding;
step nine: and (5) cutting.
2. The plastic-free paper coating process according to claim 1, wherein the plastic-free paint comprises a first coating liquid and a second coating liquid, which are applied in the second and fourth steps, respectively.
3. The plastic-free paper coating process according to claim 2, wherein the first coating liquid consists of a hard self-crosslinking acrylic emulsion, hexenyl bis stearamide, an acrylic ester leveling agent, a polyol, a plasticizer, an acetic acid solution of chitosan and an aqueous solution of sodium alginate, and is specifically prepared from the following components in parts by weight: 95-100 parts of hard self-crosslinking acrylic emulsion, 3-10 parts of hexenyl bis stearamide, 3-8 parts of acrylate leveling agent, 10-15 parts of polyol, 3-5 parts of plasticizer, 20-30 parts of acetic acid solution of chitosan and 20-30 parts of sodium alginate aqueous solution.
4. A plastic-free paper coating process according to claim 3, wherein the first coating liquid comprises the following steps:
a1, mixing 96 parts of hard self-crosslinking acrylic emulsion, 5 parts of hexenyl bis stearamide, 5 parts of acrylate leveling agent, 12 parts of polyol and 3 parts of plasticizer according to the weight ratio, and stirring by a magnetic stirrer for 20-30 min;
a2, adding 22 parts of acetic acid solution of chitosan and 22 parts of sodium alginate aqueous solution into the mixed solution obtained in the A1, then placing the solution into a heating box, heating to 80-90 ℃, stirring for 20-30 min, placing into an electric furnace after dissolution, heating and drying for 60-70 min, wherein the heating temperature is 70-80 ℃, and the heating rate of the electric furnace is 15 ℃/min, so as to obtain the first coating solution of the product.
5. The plastic-free paper coating process according to claim 2, wherein the second coating liquid consists of soft self-crosslinking acrylic emulsion, tung oil, polyalcohol and plasticizer, and is specifically prepared from the following components in parts by weight: 95-100 parts of soft self-crosslinking acrylic emulsion, 5-10 parts of tung oil, 10-15 parts of polyol and 3-5 parts of plasticizer.
6. The plastic-free paper coating process according to claim 5, wherein the second coating liquid is prepared by the steps of:
a1, mixing 96 parts of soft self-crosslinking acrylic emulsion, 5 parts of tung oil, 5 parts of acrylic ester flatting agent, 12 parts of polyol and 3 parts of plasticizer according to the weight ratio, and stirring by a magnetic stirrer for 15-20 min;
a2, placing the mixed solution obtained in the step A1 into a heating box, heating to 70-80 ℃, stirring for 15-20 min, placing into an electric furnace, heating and drying for 60-70 min after dissolution, wherein the heating temperature is 70-80 ℃, and the heating speed of the electric furnace is 15 ℃/min, so as to obtain a second coating solution of the product.
7. The plastic-free paper coating process according to claim 2, wherein in the second step, the amount of the first coating liquid applied to the base paper is 3 g-4 g/square meter, and in the fourth step, the amount of the second coating liquid applied to the top layer of the first coating liquid is 3 g-4 g/square meter.
8. The plastic-free paper coating process according to claim 1, wherein the coating device comprises two side plates (1) and a coating roller (5), a first roller (2) and a second roller are horizontally arranged between the side plates (1), a pressing component (4) is arranged between the first roller (2) and the second roller, the pressing component (4) comprises two movable blocks (402), the coating roller (5) is arranged between the two movable blocks (402) in a rolling mode, and a scraping mechanism (6) is arranged at the top of the second roller.
9. The plastic-free paper coating process according to claim 8, wherein the coating device comprises a compressing assembly (4) comprising a rectangular groove formed on the side surface of the side plate (1), a first fixed shaft (401) is fixed between the groove walls of the rectangular groove, a movable block (402) is movably inserted into the first fixed shaft (401), and a first spring (403) is fixed between the first fixed shaft (401) and the bottom wall of the rectangular groove.
10. The plastic-free paper coating process according to claim 8, wherein the scraping mechanism (6) comprises a second fixed shaft (601) and a fixed plate (605) which are fixed between the two side plates (1), the fixed plate (605) is positioned under the second fixed shaft (601), a movable pipe (602) is movably connected to the shaft body of the second fixed shaft (601), a folded plate (603) and a scraping plate are respectively arranged on two sides of the movable pipe (602), a cavity is formed in the middle of the folded plate (603), a hot air blower communicated with the cavity is fixed on the side face of the folded plate (603), a plurality of air nozzles are fixedly communicated with the bottom end of the folded plate (603), and a plurality of torsion springs are fixed between the inner side plate of the scraping plate and the fixed plate (605).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310157756.6A CN116397457A (en) | 2023-02-23 | 2023-02-23 | Plastic-free paper coating process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310157756.6A CN116397457A (en) | 2023-02-23 | 2023-02-23 | Plastic-free paper coating process |
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| CN116397457A true CN116397457A (en) | 2023-07-07 |
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| CN202310157756.6A Pending CN116397457A (en) | 2023-02-23 | 2023-02-23 | Plastic-free paper coating process |
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|---|---|---|---|---|
| CN112359642A (en) * | 2020-10-27 | 2021-02-12 | 桂柳春 | Plastic-free paper and method for preparing plastic-free paper by coating |
| CN112776423A (en) * | 2021-01-06 | 2021-05-11 | 张祖松 | Corrugated board preparation process |
| CN115007346A (en) * | 2022-07-19 | 2022-09-06 | 安徽弋尚纺织科技有限公司 | Coating machine is used in processing of ventilative anti-cutting surface fabric |
| CN115142299A (en) * | 2022-07-15 | 2022-10-04 | 安徽紫江喷铝环保材料有限公司 | Plastic-free coating environment-friendly packaging material |
| CN115365081A (en) * | 2022-08-03 | 2022-11-22 | 宜宾市亮雅新材料有限公司 | From even coating equipment of type membrane |
-
2023
- 2023-02-23 CN CN202310157756.6A patent/CN116397457A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112359642A (en) * | 2020-10-27 | 2021-02-12 | 桂柳春 | Plastic-free paper and method for preparing plastic-free paper by coating |
| CN112776423A (en) * | 2021-01-06 | 2021-05-11 | 张祖松 | Corrugated board preparation process |
| CN115142299A (en) * | 2022-07-15 | 2022-10-04 | 安徽紫江喷铝环保材料有限公司 | Plastic-free coating environment-friendly packaging material |
| CN115007346A (en) * | 2022-07-19 | 2022-09-06 | 安徽弋尚纺织科技有限公司 | Coating machine is used in processing of ventilative anti-cutting surface fabric |
| CN115365081A (en) * | 2022-08-03 | 2022-11-22 | 宜宾市亮雅新材料有限公司 | From even coating equipment of type membrane |
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