CN110511641A - A kind of BOPA pre-coating film and preparation method thereof enhancing UV ink adhesion - Google Patents
A kind of BOPA pre-coating film and preparation method thereof enhancing UV ink adhesion Download PDFInfo
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- CN110511641A CN110511641A CN201910900271.5A CN201910900271A CN110511641A CN 110511641 A CN110511641 A CN 110511641A CN 201910900271 A CN201910900271 A CN 201910900271A CN 110511641 A CN110511641 A CN 110511641A
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- 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
- C09D133/00—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 only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/24—Homopolymers or copolymers of amides or imides
- C09D133/26—Homopolymers or copolymers of acrylamide or methacrylamide
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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
- C08J2433/00—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 only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2433/24—Homopolymers or copolymers of amides or imides
- C08J2433/26—Homopolymers or copolymers of acrylamide or methacrylamide
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Abstract
The present invention relates to printing ink coating technology fields, in particular to a kind of BOPA pre-coating film and preparation method thereof for enhancing UV ink adhesion, wherein, the BOPA pre-coating film of the enhancing UV ink adhesion includes polyamide film and coating layer, and the coating layer is made of aqueous acrylamide amide copolymer lotion, water cross-linking agent and water；The aqueous acrylamide amide copolymer lotion, the ratio of water cross-linking agent and water are as follows: 9-11:0.3-0.5:9-11.Using a kind of BOPA pre-coating film for enhancing UV ink adhesion prepared by the present invention, printing firmness with raising UV ink on BOPA film, meet the demand of subsequent processing operations, solve the problems, such as that industry is easy to fall off UV printing ink, the not only simple process of preparation method and coating, the coating layer is also fairly obvious to the promotion of UV ink adhesion, is with a wide range of applications.
Description
Technical field
The present invention relates to printing ink coating technology field, in particular to a kind of BOPA precoating for enhancing UV ink adhesion
Film and preparation method thereof.
Background technique
A kind of completely new green technology uv radiation curing technology has been developed since the seventies, is produced by the technology
UV curable ink, abbreviation UV ink, which, which has, is free of organic compound volatile matter (VOC), and environmental pollution is small, Gu
The advantages that change speed is fast, saves the energy, is suitable for high-speed automated production.And traditional ink is volatile, curing rate is slow, unfavorable
In environmental protection, therefore, UV ink can be described as the substitute of traditional ink.
With the development of modern technologies, UV ink has become a kind of ink technology of comparative maturity, and application range increasingly expands
Extensively.But be the energy since UV ink is by ultraviolet light, photoinitiator generates free radicals after by ultraviolet light irradiation in ink
Or cation causes polymer solidification, curing time is short, will result in UV ink sometimes in this way in base film surface adhesion force
Low problem.Meanwhile although we can improve the surface tension of base film itself on base film by sided corona treatment,
Reach the wetability for increasing UV ink, but the material surface tension stability that sided corona treatment is crossed is poor, over time,
Corona effects can gradually weaken, and especially under the larger environment of humidity, corona effects weaken faster.
Summary of the invention
To solve the problems, such as that the existing UV ink mentioned in background technique is printed onto base film surface there are poor adhesive force,
The present invention provides a kind of enhancing UV ink adhesion BOPA pre-coating film, including polyamide film and coating layer；
The coating layer is that the water-based emulsion of coating layer is formed coated in the polyamide film layer surface, the coating layer
The component of water-based emulsion include aqueous acrylamide amide copolymer lotion, water cross-linking agent and water；
Wherein, the aqueous acrylamide amide copolymer lotion is copolymerized by acrylamide, acrylate, methylene-succinic acid
It arrives；The water cross-linking agent is trimethylol melamine crosslinking agent.
On the basis of above scheme, further, the acrylate is preferably ethyl 2-methacrylate, the water
Preferably pure water.
On the basis of above scheme, further, the aqueous acrylamide amide copolymer lotion, water cross-linking agent and water
Mass ratio be (9-11): (0.3-0.5): (9-11).
On the basis of above scheme, further, the quality of the acrylamide, acrylate, methylene-succinic acid
Than for (3.5-5.5): (3.5-6.5): (1.5-2.5).
On the basis of above scheme, further, the coating layer with a thickness of 0.5 μm -1.0 μm.
On the basis of above scheme, further, the polyamide film with a thickness of 15 μm -25 μm.
On the basis of above scheme, further, the polyamide film is biaxial tension PA film.
On the basis of above scheme, further, the polyamide film is nylon 6, nylon 6,6, nylon 6 and Buddhist nun
One of copolymer, nylon 612, nylon 610, nylon 12, nylon 1212 and the poly- meta-xylene adipoyl diamines of dragon 6,6
Or it a variety of is mixed.
The present invention provides a kind of preparation method of enhancing UV ink adhesion BOPA pre-coating film, comprising the following steps:
Step a: will be cast by squeezing out, and obtain polyamide sheet material, and by biaxial tension, it is poly- to obtain biaxial tension for sizing
Amide film；Sided corona treatment finally is carried out on its surface, obtains polyamide film；The corona of the polyamide film layer surface
Value is preferably greater than to be equal to 52dyn/cm；
Step b: polyamide film prepared by step a, by coating machine, with anilox roll coating method, by coating layer
Water-based emulsion be coated on BOPA film corona face, by drying at a temperature of 100 DEG C -120 DEG C, the drying time is preferably
Curing inside 40 DEG C of -50 DEG C of baking ovens is finally placed in 15s-30s, winding, and the curing time preferably for 24 hours -72h is enhanced
The BOPA pre-coating film of UV ink adhesion.
On the basis of above scheme, further, the water-based emulsion of the coating layer the preparation method comprises the following steps: by aqueous third
Acrylamide copolymer emulsion, water are added in reaction vessel and are stirred, and the mixing speed is preferably 200r/min, mixing time
Preferably 10-15min；Water cross-linking agent is added, and continues to stir, mixing speed is preferably after water cross-linking agent is added
200r/min, mixing time are preferably 10-15min, meanwhile, after mixing evenly, preferably standing 5-10min finally obtains coating
The water-based emulsion of layer.
On the basis of above scheme, the two-way stretching polyamide after sided corona treatment further, in the step a is carried out
Corona value >=52dyn/cm of film surface.
A kind of BOPA pre-coating film and preparation method thereof enhancing UV ink adhesion provided by the invention, with prior art phase
Than, have following technical principle and the utility model has the advantages that
It is provided by the invention it is a kind of enhance UV ink adhesion BOPA pre-coating film configured by specific coating layer and
Preparation process, the not only simple process of the preparation method of coating fluid and coating, coating layer is to the promotion of UV ink adhesion also ten
It is clearly demarcated aobvious；Methylene-succinic acid itself contains unsaturated double-bond, has active chemical property, can also except can be in addition to self-polymerization
To polymerize with different number of other monomers, polymerization macromolecule is formed, and can increase the adhesive force of glue, realized water-soluble.By
It is trimethylol melamine crosslinking agent in water cross-linking agent, has very in trimethylol melamine crosslinking agent containing methylol
High reactivity is easy to react with the amide groups in aqueous acrylamide amide copolymer lotion, it is poly- to form a three-dimensional (solid)
The cross-linking products of polymer network structure have elasticity, excellent thermal stability well, at the same have pigment range it is wide, it is water-fast,
The superior functions such as safety and sanitation；Therefore, coating fluid is firmly combined with polyamide film in BOPA pre-coating film obtained, and is applied
The acryloyl group in aqueous acrylamide amide copolymer lotion inside cloth liquid can be solid with the UV ink containing acrylamide group
Change reaction, so that the BOPA pre-coating film being prepared can effectively enhance the adhesive force of UV ink.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is that a kind of BOPA for enhancing UV ink adhesion provided by the invention precoats membrane structure diagram.
Appended drawing reference:
10 polyamide film, 20 coating layer
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply opposite
Importance.
The present invention provides a kind of enhancing UV ink adhesion BOPA pre-coating film, including polyamide film 10 and coating layer
20；
The coating layer 20 is that the water-based emulsion of coating layer 20 is formed coated in 10 surface of polyamide film, described
The component of the water-based emulsion of coating layer 20 includes aqueous acrylamide amide copolymer lotion, water cross-linking agent and water；
Wherein, the aqueous acrylamide amide copolymer lotion is copolymerized by acrylamide, acrylate, methylene-succinic acid
It arrives；The water cross-linking agent is trimethylol melamine crosslinking agent.
When it is implemented, the aqueous acrylamide amide copolymer lotion can be made using following preparation method: weighing
A certain amount of methylene-succinic acid and dispersion stabilizer PEG20000 are put into polymeric kettle, and low whipping speed is to fill under 900r/min
Divide stirring, acrylamide aqueous solution and 2- methacrylic acid second is added in incorporation time 15min in the state of being then stirred for
Ester, while the oxygen in nitrogen (99.9%) removing system of high-purity is injected, guarantee in whole experiment process under anoxybiotic environment
It carries out, leads to nitrogen 30min deoxidation, mixed liquor is creamy white lotion in the process；In deoxidation process temperature to control 25 DEG C degree with
Under, prevent the generation of premature polymerization；Temperature is adjusted after deoxidation, is initially added into initiator azo two after temperature reaches 40 DEG C
Isobutyl imidazoline hydrochloride, addition time are 6min.System starts to warm up after initiator has been added, and temperature is kept in reaction process
At 45 ± 2 DEG C, being kept stirring speed is 600r/min, to guarantee that reaction system is uniformly dispersed, continues to polymerize after the falling of interior temperature
After 8h, stop heating, cooling, filtering obtains the lotion.
As a preferred embodiment, the acrylamide, acrylate, methylene-succinic acid, dispersion stabilizer
PEG20000, the mass ratio of two isobutyl imidazoles woods hydrochloride of azo are (3.5-5.5): (3.5-6.5): (1.5-2.5): (4.0-
5.0): (0.02-0.03).
Preferably, the mass ratio of the aqueous acrylamide amide copolymer lotion, water cross-linking agent and water is (9-11):
(0.3-0.5):(9-11)。
When it is implemented, the coating obtained under the conditions of the ratio is obtained by many experiments, not only to polyamide film
Adhesive force it is good, while can also improve UV printing ink adhesive force.Since water cross-linking agent is trimethylol melamine friendship
Join agent, itself contains methylol, has very high activity cannot be with aqueous acrylamide amide copolymer if additive amount is very little
Sufficiently reaction, cannot get good reticular structure, will affect coating and adhesion of thin film also will affect the jail of UV ink simultaneously
Degree.If additive amount is too high, react excessive with aqueous acrylamide amide copolymer, although the attached of coating and polyamide film can be improved
Put forth effort, but since coating crosslinking is excessive, coating is too hard, without elasticity, influences whether the adhesive force of UV ink.
Preferably, the coating layer 20 with a thickness of 0.5 μm -1.0 μm.
Preferably, the polyamide film 10 with a thickness of 15 μm -25 μm.
When it is implemented, being combined the production cost of pre-coating film by many experiments it is found that in the coating layer 20
With a thickness of 0.5 μm -1.0 μm, the polyamide film 10 with a thickness of under conditions of 15 μm -25 μm, enhancing UV ink is attached
The cost performance for the BOPA pre-coating film puted forth effort is high.
Preferably, the polyamide film 10 is biaxial tension PA film.
Preferably, the polyamide film 10 is copolymer, the nylon of nylon 6, nylon 6,6, nylon 6 and nylon 6,6
612, it one of nylon 610, nylon 12, nylon 1212 and poly- meta-xylene adipoyl diamines or a variety of is mixed.
The present invention also provides a kind of preparation methods of enhancing UV ink adhesion BOPA pre-coating film, including following step
It is rapid:
Step a: will be cast by squeezing out, and obtain polyamide sheet material, and by biaxial tension, it is poly- to obtain biaxial tension for sizing
Amide film；Sided corona treatment finally is carried out on its surface, obtains polyamide film 10；
Step b: polyamide film 10 prepared by step a will be coated with by coating machine with anilox roll coating method
The water-based emulsion of layer 20 is coated on BOPA film corona face, by drying at a temperature of 100 DEG C -120 DEG C, is wound, is finally placed 40
Curing inside DEG C of -50 DEG C baking ovens, obtains the BOPA pre-coating film of enhancing UV ink adhesion.
Preferably, the water-based emulsion of the coating layer 20 the preparation method comprises the following steps: by aqueous acrylamide amide copolymer lotion, water
It is added in reaction vessel and is stirred, add water cross-linking agent, and continue to stir, finally obtain coating layer.
When it is implemented, step a: will be cast by squeezing out, and obtain polyamide sheet material, by biaxial tension, sizing is obtained
Two-way stretching polyamide film；Sided corona treatment finally is carried out on its surface, corona value >=52dyn/cm obtains polyamide film
10；
Step b: polyamide film 10 prepared by step a will be coated with by coating machine with anilox roll coating method
The water-based emulsion of layer 20 is coated on BOPA film corona face, by drying 15s-30s at a temperature of 100 DEG C -120 DEG C, is wound, is finally put
Curing inside 40 DEG C of -50 DEG C of baking ovens is set, the BOPA pre-coating film of enhancing UV ink adhesion is obtained；
The water-based emulsion of the coating layer 20 the preparation method comprises the following steps: weighing quantitative aqueous third in the plastic barrel of 200KG
Acrylamide copolymer emulsion, after weigh quantitative water and be added, stirred with blender, mixing speed 200r/min, time 10-
15min is stirred evenly, and quantitative water cross-linking agent is then added, then stirred with blender, speed 200r/min, and the time is
10-15min is stirred evenly, and stands 5min-10min, for use.
As shown in Figure 1, the structural schematic diagram of the BOPA pre-coating film for the enhancing UV ink adhesion.
Preferably, in the step a carry out sided corona treatment after two-way stretching polyamide film surface corona value >=
52dyn/cm。
The present invention also provides embodiments as follows:
Embodiment 1
It will be cast by squeezing out, and obtain polyamide sheet material, using biaxial tension, rear surface of being formed is by corona
Reason, obtains corona value >=52dyn/cm polyamide film 10, using by aqueous acrylamide amide copolymer lotion, aqueous crosslinking
The ratio of agent and pure water are as follows: 10:0.3:10, three's interworking obtain water-based emulsion, and by anilox roll of coating machine, water-based emulsion is applied
By drying 20s at a temperature of 110 DEG C on cloth to the corona surface of polyamide film 10, winds, finally place ripe inside 45 DEG C of baking ovens
Change 48h, obtains the BOPA pre-coating film of enhancing UV ink adhesion.
Wherein, aqueous acrylamide amide copolymer lotion is by above-mentioned preparation method by containing acrylamide, 2- methyl-prop
Olefin(e) acid ethyl ester, methylene-succinic acid copolymerization are made；
Aqueous acrylamide amide copolymer lotion, water cross-linking agent and pure water three weigh in proportion, pass through above-mentioned preparation
The water-based emulsion of coating layer 20 can be obtained in method；
The water cross-linking agent is trihydroxy melamine crosslinkers；
Coating layer 20 with a thickness of 1 μm, the biaxial tension PA film that polyamide film 10 is selected with a thickness of 15 μm, wherein
Use resin for nylon 6.
Embodiment 2
It will be cast by squeezing out, and obtain polyamide sheet material, using biaxial tension, rear surface of being formed is by corona
Reason, obtains corona value >=52dyn/cm polyamide film 10, using by aqueous acrylamide amide copolymer lotion, aqueous crosslinking
The ratio of agent and pure water are as follows: 10:0.4:10, three's interworking obtain water-based emulsion, and by anilox roll of coating machine, water-based emulsion is applied
By drying 20s at a temperature of 110 DEG C on cloth to the corona surface of polyamide film 10, winds, finally place ripe inside 45 DEG C of baking ovens
Change 48h, obtains the BOPA pre-coating film of enhancing UV ink adhesion.
Wherein, aqueous acrylamide amide copolymer lotion is by above-mentioned preparation method by containing acrylamide, 2- methyl-prop
Olefin(e) acid ethyl ester, methylene-succinic acid copolymerization are made；
Aqueous acrylamide amide copolymer lotion, water cross-linking agent and pure water three weigh in proportion, pass through above-mentioned preparation
The water-based emulsion of coating layer 20 can be obtained in method；
The water cross-linking agent is trihydroxy melamine crosslinkers；
Coating layer 20 with a thickness of 1 μm, the biaxial tension PA film that polyamide film 10 is selected with a thickness of 15 μm, wherein
Use resin for nylon 6.
Embodiment 3
It will be cast by squeezing out, and obtain polyamide sheet material, using biaxial tension, rear surface of being formed is by corona
Reason, obtains corona value >=52dyn/cm polyamide film 10, using by aqueous acrylamide amide copolymer lotion, aqueous crosslinking
The ratio of agent and pure water are as follows: 10:0.5:10 three's interworking obtains water-based emulsion, and by anilox roll of coating machine, water-based emulsion is applied
By drying 20s at a temperature of 110 DEG C on cloth to the corona surface of polyamide film 10, winds, finally place ripe inside 45 DEG C of baking ovens
Change 48h, obtains the BOPA pre-coating film of enhancing UV ink adhesion.
Wherein, aqueous acrylamide amide copolymer lotion is by above-mentioned preparation method by containing acrylamide, 2- methyl-prop
Olefin(e) acid ethyl ester, methylene-succinic acid copolymerization are made；
Aqueous acrylamide amide copolymer lotion, water cross-linking agent and pure water three weigh in proportion, pass through above-mentioned preparation
The water-based emulsion of coating layer 20 can be obtained in method；
The water cross-linking agent is trihydroxy melamine crosslinkers；；
Coating layer 20 with a thickness of 1 μm, the biaxial tension PA film that polyamide film 10 is selected with a thickness of 15 μm, wherein
Use resin for nylon 6.
Comparative example 1
It will be cast by squeezing out, and obtain polyamide sheet material, using biaxial tension, rear surface of being formed is by corona
Reason, obtains corona value >=52dyn/cm polyamide film 10, using by aqueous acrylamide amide copolymer lotion, aqueous crosslinking
The ratio of agent and pure water are as follows: 10:0.2:10, three's interworking obtain water-based emulsion, and by anilox roll of coating machine, water-based emulsion is applied
By drying 20s at a temperature of 110 DEG C on cloth to the corona surface of polyamide film 10, winds, finally place ripe inside 45 DEG C of baking ovens
Change 48h, obtains the BOPA pre-coating film of enhancing UV ink adhesion.
Wherein, aqueous acrylamide amide copolymer lotion is by above-mentioned preparation method by containing acrylamide, 2- methyl-prop
Olefin(e) acid ethyl ester, methylene-succinic acid copolymerization are made；
Aqueous acrylamide amide copolymer lotion, water cross-linking agent and pure water three weigh in proportion, pass through above-mentioned preparation
The water-based emulsion of coating layer 20 can be obtained in method；
The water cross-linking agent is trihydroxy melamine crosslinkers；
Coating layer 20 with a thickness of 1 μm, polyamide film 10 select with a thickness of 15 μm biaxial tension PA film wherein
Use resin for nylon 6.
Comparative example 2
It will be cast by squeezing out, and obtain polyamide sheet material, using biaxial tension, rear surface of being formed is by corona
Reason, obtains corona value >=52dyn/cm polyamide film 10, using by aqueous acrylamide amide copolymer lotion, aqueous crosslinking
The ratio of agent and pure water are as follows: 10:0.6:10, three's interworking obtain water-based emulsion, and by anilox roll of coating machine, water-based emulsion is applied
By drying 20s at a temperature of 110 DEG C on cloth to the corona surface of polyamide film 10, winds, finally place ripe inside 45 DEG C of baking ovens
Change 48h, obtains the BOPA pre-coating film of enhancing UV ink adhesion.
Wherein, aqueous acrylamide amide copolymer lotion is by above-mentioned preparation method by containing acrylamide, 2- methyl-prop
Olefin(e) acid ethyl ester, methylene-succinic acid copolymerization are made；
Aqueous acrylamide amide copolymer lotion, water cross-linking agent and pure water three weigh in proportion, pass through above-mentioned preparation
The water-based emulsion of coating layer 20 can be obtained in method；
The water cross-linking agent is trihydroxy melamine crosslinkers；
Coating layer 20 with a thickness of 1 μm, the biaxial tension PA film that polyamide film 10 is selected with a thickness of 15 μm, wherein
Use resin for nylon 6.
Comparative example 3
It will be cast by squeezing out, and obtain polyamide sheet material, using biaxial tension, rear surface of being formed is by corona
Reason, obtains corona value >=52dyn/cm polyamide film 10, using by aqueous acrylamide amide copolymer lotion, aqueous crosslinking
The ratio of agent and pure water are as follows: 10:0.4:10, three's interworking obtain water-based emulsion, and by anilox roll of coating machine, water-based emulsion is applied
By drying 20s at a temperature of 110 DEG C on cloth to the corona surface of polyamide film 10, winds, finally place ripe inside 45 DEG C of baking ovens
Change 48h, obtains the BOPA pre-coating film of enhancing UV ink adhesion.
Wherein, aqueous acrylamide amide copolymer lotion is by above-mentioned preparation method by containing acrylamide, 2- methyl-prop
Olefin(e) acid ethyl ester, methylene-succinic acid copolymerization are made；
Aqueous acrylamide amide copolymer lotion, water cross-linking agent and pure water three weigh in proportion, pass through above-mentioned preparation
The water-based emulsion of coating layer 20 can be obtained in method；
The water cross-linking agent uses existing aqueous polyisocyanate curing agent；
Coating layer 20 with a thickness of 1 μm, the biaxial tension PA film that polyamide film 10 is selected with a thickness of 15 μm, wherein
Use resin for nylon 6.
Comparative example 4
It will be cast by squeezing out, and obtain polyamide sheet material, using biaxial tension, rear surface of being formed is by corona
Reason, obtains corona value >=52dyn/cm polyamide film 10, using by aqueous acrylamide amide copolymer lotion, aqueous crosslinking
The ratio of agent and pure water are as follows: 10:0.4:10, three's interworking obtain water-based emulsion, and by anilox roll of coating machine, water-based emulsion is applied
By drying 20s at a temperature of 110 DEG C on cloth to the corona surface of polyamide film 10, winds, finally place ripe inside 45 DEG C of baking ovens
Change 48h, obtains the BOPA pre-coating film of enhancing UV ink adhesion.
Wherein, aqueous acrylamide amide copolymer lotion is by above-mentioned preparation method by containing acrylamide, 2- methyl-prop
The copolymerization of olefin(e) acid ethyl ester is made；
Aqueous acrylamide amide copolymer lotion, water cross-linking agent and pure water three weigh in proportion, pass through above-mentioned preparation
The water-based emulsion of coating layer 20 can be obtained in method；
The water cross-linking agent uses trihydroxy melamine crosslinkers；
Coating layer 20 with a thickness of 1 μm, the biaxial tension PA film that polyamide film 10 is selected with a thickness of 15 μm, wherein
Use resin for nylon 6.
Comparative example 5
It will be cast by squeezing out, and obtain polyamide sheet material, using biaxial tension, rear surface of being formed is by corona
Reason, obtains corona value >=52dyn/cm polyamide film 10.
Wherein, the biaxial tension PA film that polyamide film 10 is selected with a thickness of 15 μm, wherein using resin for nylon
6。
By polyamide film made from above-described embodiment and comparative example, the printing of UV ink is carried out, drawing ink amount with dropper is
The UV ink of 0.2cc is coated on polyamide film with No. 2 sticks, then is exported with the UV-LED lamp 100% of 385nm, is with speed
40m/min carries out illumination curing, obtains UV ink layer.
Above-described embodiment and comparative example are printed to the polyamide film of UV ink layer, adhesive tape bonding test is carried out: will grow
The 3M adhesive tape gluing of 15-20cm, wide 0.5-1.0inch are on the UV ink layer for be printed on the polyamide film of UV ink layer and incite somebody to action
It is flattened, and is then removed adhesive tape with uniform speed, is observed and estimate the residual rate of UV ink.
Above-described embodiment and comparative example are printed on to the polyamide film of UV ink layer, compound CPP is carried out, does peel strength
Test: polyamide film and CPP Film laminated by the way that UV ink layer with dual-component polyurethane composite glue, will be printed on, it is compound
Spread is 3.0g/m2, then BOPA/UV ink/CPP composite membrane is obtained by 45 DEG C of baking oven curing 72h.Then 180 ° are carried out
Composite membrane peel strength test observes peel strength and observes residual rate of the UV ink on BOPA pre-coating film.
Test result is as shown in table 1:
1 embodiment of table and comparative example performance test table
As can be seen from the above data, embodiment 1-3 is more preferable relative to the adhesive force of UV ink in comparative example 1-3.And compare
Although water cross-linking agent is on the low side compared with having addition water cross-linking agent in example 1, coating itself is not only reduced to polyamide film
Adhesive force also reduce the adhesive force of UV ink simultaneously；And water cross-linking agent is equally added in comparative example 2, but dosage is inclined
Height, although can increase the fastness of coating and polyamide film, coating itself is partially hard, is unfavorable for the attachment of UV ink, from
And reduce the adhesive force of UV ink；Comparative example 3 uses common water borne crosslinking agent, although the residual rate of UV ink can reach 50%,
But it is low compared with the UV ink residual rate of addition trimethylol melamine crosslinking agent；And adhesive force compares addition trihydroxy methyl three
The embodiment of paracyanogen amine crosslinker is worse compared to performance；It is not added with methylene-succinic acid in comparative example 4, although to a certain extent can
The residual power and adhesive force of UV ink are improved, but effect is not better than addition methylene-succinic acid.Comparative example 5 is polyamide
Film directly prints UV ink glue by corona, and such UV instantaneous solidification causes that BOPA film surface cannot be soaked well,
Cause adhesive force deviation.
Although more herein used the terms such as polyamide film, coating layer, it is not precluded and uses it
A possibility that its term.The use of these items is only for be more convenient to describe and explain essence of the invention；They are solved
Being interpreted into any additional limitation is disagreed with spirit of that invention.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of enhancing UV ink adhesion BOPA pre-coating film, it is characterised in that: including polyamide film (10) and coating layer
(20)；
The coating layer (20) is that the water-based emulsion of coating layer (20) is formed coated in the polyamide film (10) surface, institute
The component for stating the water-based emulsion of coating layer (20) includes aqueous acrylamide amide copolymer lotion, water cross-linking agent and water；
Wherein, the aqueous acrylamide amide copolymer lotion is copolymerized to obtain by acrylamide, acrylate, methylene-succinic acid；
The water cross-linking agent is trimethylol melamine crosslinking agent.
2. enhancing UV ink adhesion BOPA pre-coating film according to claim 1, it is characterised in that: the aqueous acrylamide acyl
The mass ratio of amine copolymer object lotion, water cross-linking agent and water is (9-11): (0.3-0.5): (9-11).
3. enhancing UV ink adhesion BOPA pre-coating film according to claim 1, it is characterised in that: the acrylamide,
Acrylate, methylene-succinic acid mass ratio be (3.5-5.5): (3.5-6.5): (1.5-2.5).
4. enhancing UV ink adhesion BOPA pre-coating film according to claim 1, it is characterised in that: the coating layer (20)
With a thickness of 0.5 μm -1.0 μm.
5. enhancing UV ink adhesion BOPA pre-coating film according to claim 1, it is characterised in that: the polyamide film
Layer (10) with a thickness of 15 μm -25 μm.
6. enhancing UV ink adhesion BOPA pre-coating film according to claim 1, it is characterised in that: the polyamide film
Layer (10) is biaxial tension PA film.
7. enhancing UV ink adhesion BOPA pre-coating film according to claim 1, it is characterised in that: the polyamide film
Layer (10) is copolymer, nylon 612, nylon 610, the nylon 12, nylon 1212 of nylon 6, nylon 6,6, nylon 6 and nylon 6,6
And it one of poly- meta-xylene adipoyl diamines or a variety of is mixed.
8. a kind of preparation method of any one of -7 enhancing UV ink adhesion BOPA pre-coating films according to claim 1, special
Sign is, comprising the following steps:
Step a: will be cast by squeezing out, and obtain polyamide sheet material, and by biaxial tension, sizing obtains two-way stretching polyamide
Film；Sided corona treatment finally is carried out on its surface, obtains polyamide film；
Step b: polyamide film prepared by step a, by coating machine, with anilox roll coating method, by the water of coating layer
Property lotion be coated on BOPA film corona face, by being dried at a temperature of 100 DEG C -120 DEG C, wind, finally place 40 DEG C of -50 DEG C of bakings
Curing inside case, obtains the BOPA pre-coating film of enhancing UV ink adhesion.
9. the preparation method of enhancing UV ink adhesion BOPA pre-coating film according to claim 8, which is characterized in that described
The water-based emulsion of coating layer the preparation method comprises the following steps: by aqueous acrylamide amide copolymer lotion, water be added reaction vessel in stir
It mixes, adds water cross-linking agent, and continue to stir, finally obtain the water-based emulsion of coating layer.
10. the preparation method of enhancing UV ink adhesion BOPA pre-coating film according to claim 8, it is characterised in that: institute
State corona value >=52dyn/cm that the two-way stretching polyamide film surface after sided corona treatment is carried out in step a.
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| CN201910900271.5A CN110511641B (en) | 2019-09-23 | 2019-09-23 | BOPA (biaxially-oriented polyamide) pre-coating film for enhancing adhesive force of UV (ultraviolet) ink and preparation method thereof |
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| CN110511641B (en) | 2021-07-23 |
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