CN111748119A - Environment-friendly ultrahigh-barrier coating film - Google Patents
Environment-friendly ultrahigh-barrier coating film Download PDFInfo
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- CN111748119A CN111748119A CN202010643895.6A CN202010643895A CN111748119A CN 111748119 A CN111748119 A CN 111748119A CN 202010643895 A CN202010643895 A CN 202010643895A CN 111748119 A CN111748119 A CN 111748119A
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- 238000000576 coating method Methods 0.000 title claims abstract description 79
- 239000011248 coating agent Substances 0.000 title claims abstract description 71
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 52
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 50
- 239000010410 layer Substances 0.000 claims abstract description 26
- 239000002346 layers by function Substances 0.000 claims abstract description 22
- 239000000853 adhesive Substances 0.000 claims abstract description 17
- 230000001070 adhesive effect Effects 0.000 claims abstract description 17
- 239000011127 biaxially oriented polypropylene Substances 0.000 claims abstract description 16
- 229920006378 biaxially oriented polypropylene Polymers 0.000 claims abstract description 16
- 239000000758 substrate Substances 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 12
- 238000007759 kiss coating Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000004804 winding Methods 0.000 claims description 16
- 230000004888 barrier function Effects 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 11
- 230000007246 mechanism Effects 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 230000037452 priming Effects 0.000 claims 1
- 238000000926 separation method Methods 0.000 claims 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 8
- 239000001301 oxygen Substances 0.000 abstract description 8
- 229910052760 oxygen Inorganic materials 0.000 abstract description 8
- 239000007787 solid Substances 0.000 abstract description 6
- 239000002994 raw material Substances 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 2
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 4
- 239000011247 coating layer Substances 0.000 description 4
- 239000005033 polyvinylidene chloride Substances 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000005022 packaging material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920006284 nylon film Polymers 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H75/00—Storing webs, tapes, or filamentary material, e.g. on reels
- B65H75/02—Cores, formers, supports, or holders for coiled, wound, or folded material, e.g. reels, spindles, bobbins, cop tubes, cans, mandrels or chucks
- B65H75/04—Kinds or types
- B65H75/08—Kinds or types of circular or polygonal cross-section
- B65H75/10—Kinds or types of circular or polygonal cross-section without flanges, e.g. cop tubes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/048—Forming gas barrier coatings
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D129/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Coating compositions based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Coating compositions based on derivatives of such polymers
- C09D129/02—Homopolymers or copolymers of unsaturated alcohols
- C09D129/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2429/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2429/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2429/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2475/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/14—Gas barrier composition
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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Abstract
The invention discloses an environment-friendly ultrahigh-barrier coating film which comprises a coating film body, a substrate layer, a bottom coating and a functional layer, wherein the coating film body consists of the substrate layer, the bottom coating and the functional layer; according to the invention, PVA is uniformly coated on the surfaces of BOPP, PET, PA and PE by taking polyvinyl alcohol with a high molecular chain as a main body in a reverse kiss coating mode to form compact PVA films, and the adopted PVA raw material is a high-hydrolysis-degree system, so that the risk of performance reduction in high humidity is greatly reduced; the primer pre-coating process is carried out on the surfaces of BOPP, PET, PA and PE before PVA is coated, so that the adhesive force of the PVA and the BOPP base material is increased, and the problem of shrinkage of the PVA when the PVA is directly coated on the BOPP, PET, PA and PE is solved; the method is characterized by passing high molecular chain polyvinyl alcohol and low molecular chain polyvinyl alcohol through a reactor with the weight ratio of 1: 2.3, the solid content of the solution is improved without increasing the viscosity of the solution, and the PVA has good printing performance and oxygen resistance after film forming.
Description
Technical Field
The invention belongs to the technical field of coating films, and particularly relates to an environment-friendly ultrahigh-barrier coating film.
Background
PVDC is the best packaging material for the combination of barrier properties in plastic packaging in the world today. It is a high-barrier material with excellent moisture and gas barrier properties, which is different from that polyvinyl alcohol has the rapid decrease of gas barrier properties along with the increase of moisture absorption and is different from that nylon films have the poor moisture barrier properties due to the water absorption.
The barrier properties of PVDC are several times, tens or even hundreds times that of ordinary packaging materials. Therefore, the food packaged by the material has excellent protective effect on the color, the fragrance and the taste of the food. Meanwhile, the moisture-proof paint is very effective for food, can prolong the storage life of the food by times and greatly reduce the deterioration of the food caused by various factors such as seasonal change and the like. The material not only has excellent high-barrier performance, but also has excellent printing performance and composite transparency.
The existing ultra-high barrier coating film generally uses PVDC (polyvinylidene chloride) to coat on a substrate so as to achieve the good oxygen barrier property of the coating film, and the barrier property of the coating has certain limitation and only can enable the oxygen barrier property of the substrate to reach 10cm3/(m224h) or so; the coating is not degradable and recyclable, so that the problem of environmental protection exists; other PVA (polyvinyl alcohol) coatings adopt a direct coating process, which can cause the problems of shrinkage cavity, poor coating adhesion and poor printing performance on coating base materials; the solid content of the existing PVA (polyvinyl alcohol) is generally low at 6 percent, if the solid content is increased, the viscosity of the solution is increased, and the coating cannot be normally coated, and if the solid content is low, the coating is not easy to dry in the coating process, and the sizing amount cannot reach the sizing amount which can be realized by the product function.
In order to realize environmental protection and degradability of coating materials and improve oxygen resistance, an environment-friendly ultrahigh-barrier coating film is provided.
Disclosure of Invention
The invention aims to provide an environment-friendly ultrahigh-barrier coating film, which realizes environment-friendly degradability of a coating material and improves oxygen barrier performance.
In order to achieve the purpose, the invention provides the following technical scheme: an environment-friendly ultrahigh-barrier coating film comprises a coating film body, a substrate layer, a base coating layer and a functional layer, wherein the coating film body consists of the substrate layer, the base coating layer and the functional layer; and uniformly coating the functional layer on the bottom coating layer by a coating step II, drying and winding the functional layer by a drying step II, curing for 24 hours at the later stage to completely cure the bottom coating layer and completely dry the functional layer, and finally cutting and warehousing.
As a preferable technical scheme of the invention, PVA is uniformly coated on the surfaces of BOPP, PET, PA and PE by using polyvinyl alcohol with a high molecular chain as a main body in a reverse kiss coating mode to form compact PVA films.
As a preferable technical scheme of the invention, a prime coat pre-coating process (two-component polyurethane glue) is carried out on the surfaces of BOPP, PET, PA and PE before PVA is coated.
In a preferred embodiment of the present invention, the polyvinyl alcohol having a high molecular chain and the polyvinyl alcohol having a low molecular chain are reacted by passing the mixture of 1: 2.3, proportioning.
As a preferable technical scheme of the invention, the polyvinyl alcohol has a high molecular chain number of 17-99 and a low molecular chain number of 05-99.
The coating film comprises a coating film body and a winding and uncovering mechanism, wherein the winding and uncovering mechanism comprises a winding drum and double-sided adhesive force strips, the coating film body is wound on the outer wall of the winding drum, and the double-sided adhesive force strips are arranged at the end parts of the coating film body.
Compared with the prior art, the invention has the beneficial effects that:
(1) PVA is uniformly coated on the surfaces of BOPP, PET, PA and PE by taking polyvinyl alcohol with a high molecular chain as a main body in a reverse kiss coating mode to form compact PVA films, and the adopted PVA raw material is a high-hydrolysis-degree system, so that the risk of performance reduction in high humidity is greatly reduced;
(2) the adhesive force of the PVA and the BOPP, PET, PA and PE base materials is increased by performing a primary coating and pre-coating process (two-component polyurethane glue) on the surfaces of the BOPP, PET, PA and PE before the PVA is coated, and the problem that the PVA is directly coated on the BOPP, PET, PA and PE to cause shrinkage cavities is solved;
(3) the method is characterized by passing high molecular chain polyvinyl alcohol and low molecular chain polyvinyl alcohol through a reactor with the weight ratio of 1: 2.3, proportioning, improving the solid content of the solution without increasing the viscosity of the solution, and simultaneously ensuring that the PVA has good printing performance and oxygen resistance after forming a film;
(4) the upper part of the double-sided adhesive force strip is adhered to the end part of the coating film body, and the coating film body wound on the outer wall of the winding drum is more conveniently uncovered by the double-sided adhesive force strip protruding outwards.
Drawings
FIG. 1 is a schematic structural diagram of a coating film body according to the present invention;
FIG. 2 is a schematic view of a rolling structure of the present invention;
FIG. 3 is a process schematic of the present invention;
in the figure: 1. coating a film body; 2. a substrate layer; 3. a primer layer; 4. a functional layer; 5. a reel; 6. double-sided adhesive strips.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 2 and fig. 3, the present invention provides a technical solution: an environment-friendly ultrahigh-barrier coating film comprises a coating film body 1, a substrate layer 2, a primer layer 3 and a functional layer 4, wherein the coating film body 1 consists of the substrate layer 2, the primer layer 3 and the functional layer 4, the substrate layer 2 is coated with the primer layer 3 on the surface of the substrate layer 2 through unreeling, and the primer layer 3 is dried through drying; and uniformly coating the functional layer 4 on the bottom coating 3 through a coating step two, drying and winding the functional layer 4 through a drying step two, curing for 24 hours at the later stage to completely cure the bottom coating and completely dry the functional layer 4, and finally cutting and warehousing.
In this embodiment, preferably, the PVA is uniformly coated on the surfaces of BOPP, PET, PA, and PE by using polyvinyl alcohol having a polymer chain as a main body in a reverse kiss coating manner to form a compact PVA film, and the adopted PVA raw material is a high-hydrolysis system, thereby greatly reducing the risk of performance degradation when encountering high humidity.
In this embodiment, preferably, a primer pre-coating process (two-component polyurethane glue) is performed on the surfaces of BOPP, PET, PA, and PE before coating PVA, so as to increase the adhesion between PVA and BOPP, PET, PA, and PE base materials, and solve the problem of shrinkage cavities when PVA is directly coated on BOPP, PET, PA, and PE.
In the present embodiment, it is preferable to mix the high molecular weight polyvinyl alcohol and the low molecular weight polyvinyl alcohol by passing 1: 2.3, the solid content of the solution is improved without increasing the viscosity of the solution, and the PVA has good printing performance and oxygen resistance after film forming (the oxygen resistance is less than 1 cm)3/(m2·24h))。
In the embodiment, preferably, the polyvinyl alcohol polymer chain is 17-99, and the low molecular chain is 05-99, so as to achieve the blocking and printing performances of the PVA coating liquid in the scheme.
In this embodiment, it is preferred, still include the rolling and reveal the mechanism, this rolling is uncovered the mechanism and is included reel 5 and two-sided adhesive force strip 6, the coating film body 1 twines in the outer wall of reel 5, the tip of coating film body 1 is provided with two-sided adhesive force strip 6, the coating film body 1 twines in the outer wall of reel 5, take up two-sided adhesive force strip 6, the upper portion of two-sided adhesive force strip 6 and the tip bonding of coating film body 1, it is more convenient to utilize outside convex two-sided adhesive force strip 6 to reveal coating film body 1 who twines in the outer wall of reel 5.
The working principle and the using process of the invention are as follows: the coating film body 1 consists of a substrate layer 2, a primer layer 3 and a functional layer 4, wherein the substrate layer 2 is coated with the primer layer 3 on the surface of the substrate layer 2 through unreeling and then dried with the primer layer 3 through drying; uniformly coating the functional layer 4 on the bottom coating 3 through a coating step two, drying and winding the functional layer 4 through a drying step two, curing for 24 hours at the later stage to completely cure the bottom coating and completely dry the functional layer 4, and finally cutting and warehousing;
the coating film body 1 is wound on the outer wall of the winding drum 5, the double-sided adhesive force strip 6 is taken up, the upper part of the double-sided adhesive force strip 6 is adhered to the end part of the coating film body 1, and the coating film body 1 wound on the outer wall of the winding drum 5 is more conveniently uncovered by the double-sided adhesive force strip 6 protruding outwards.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides an environment-friendly superelevation separation coating film, includes coating film body (1), substrate layer (2), under coat (3), functional layer (4), its characterized in that: the coating film body (1) consists of a base material layer (2), a primer layer (3) and a functional layer (4), wherein the base material layer (2) is coated with the primer layer (3) on the surface of the base material layer (2) through unreeling and then dried through drying; and uniformly coating the functional layer (4) on the bottom coating (3) through a coating step II, drying and winding the functional layer (4) through a drying step II, curing for 24 hours at the later stage to completely cure the bottom coating and completely dry the functional layer (4), and finally cutting and warehousing.
2. The environment-friendly ultra-high barrier coating film according to claim 1, wherein: PVA is uniformly coated on the surfaces of BOPP, PET, PA and PE by taking polyvinyl alcohol with a high molecular chain as a main body in a reverse kiss coating mode to form compact PVA films.
3. The environment-friendly ultra-high barrier coating film according to claim 1, wherein: the surface of BOPP, PET, PA and PE is subjected to priming and pre-coating processes (two-component polyurethane glue) before PVA is coated.
4. The environment-friendly ultra-high barrier coating film according to claim 1, wherein: the method is characterized by passing high molecular chain polyvinyl alcohol and low molecular chain polyvinyl alcohol through a reactor with the weight ratio of 1: 2.3, proportioning.
5. The environment-friendly ultra-high barrier coating film according to claim 4, wherein: the polyvinyl alcohol polymer chain is 17-99, and the low molecular chain is 05-99.
6. The environment-friendly ultra-high barrier coating film according to claim 1, wherein: the winding and uncovering device is characterized by further comprising a winding and uncovering mechanism, the winding and uncovering mechanism comprises a winding drum (5) and double-sided adhesive force strips (6), the coating film body (1) is wound on the outer wall of the winding drum (5), and the double-sided adhesive force strips (6) are arranged at the end portion of the coating film body (1).
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| CN202010643895.6A CN111748119A (en) | 2020-07-07 | 2020-07-07 | Environment-friendly ultrahigh-barrier coating film |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113929949A (en) * | 2021-11-18 | 2022-01-14 | 哈尔滨工业大学无锡新材料研究院 | Modified PVA coating film and preparation method thereof |
| CN114603964A (en) * | 2022-03-14 | 2022-06-10 | 浙江汇锋智造科技有限公司 | A kind of high barrier composite new material and its production process |
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| CN202388877U (en) * | 2011-12-22 | 2012-08-22 | 中国航天科工集团8511研究所 | High-barrier composite sheet |
| CN103042811A (en) * | 2012-12-26 | 2013-04-17 | 海南赛诺实业有限公司 | Post-curing method for polyvinyl alcohol coating film |
| CN109705386A (en) * | 2018-12-27 | 2019-05-03 | 海南赛诺实业有限公司 | A kind of polyvinyl alcohol coating film and its manufacturing method |
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2020
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