CN103753925A - Low water vapor transmission rate type polyester film for acrylic acid type coating and preparation method of low-water vapor transmission rate type polyester film - Google Patents
Low water vapor transmission rate type polyester film for acrylic acid type coating and preparation method of low-water vapor transmission rate type polyester film Download PDFInfo
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- CN103753925A CN103753925A CN201310740044.3A CN201310740044A CN103753925A CN 103753925 A CN103753925 A CN 103753925A CN 201310740044 A CN201310740044 A CN 201310740044A CN 103753925 A CN103753925 A CN 103753925A
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Abstract
The invention discloses a low-water vapor transmission rate type polyester film for an acrylic acid type coating. The low-water vapor transmission rate polyester film is characterized by consisting of a double-direction stretching polyester film prepared from polyethylene terephthalate or poly-2,6-ethylene naphthalate and acrylic acid type glue coatings, wherein the both sides of the film are coated with the acrylic acid type glue coatings; the thickness of the polyester film is 150-250 microns; the thickness of the acrylic acid type glue coatings is 0.08-0.32 microns; acrylic acid type glue consists of a water-based acrylic emulsion, a nanometer silicon sol, a surfactant, a flatting agent, a de-foaming agent, a curing agent and de-ionized water; after a polyester chip is cast to form a casting piece through an extruder and forms a film through vertical stretching, the both surfaces of the film are coated with the acrylic acid type glue in an online coating manner; the low-water vapor transmission rate type polyester film for the acrylic acid type coating is prepared by transverse stretching, drying, cross-linking, curing and thermal shaping. The film provided by the invention can be used for manufacturing a backboard film for a solar battery or other products in need of the low-water vapor transmission rate polyester film.
Description
Technical field
The invention belongs to organic high molecular compound and preparation thereof, relate to low water vapor transmittance polyester film of a kind of acrylic type coating and preparation method thereof.The low water vapor transmittance polyester film of acrylic type coating prepared by the present invention is applicable to manufacture solar cell backboard film or other needs the polyester film goods of low water vapor transmittance.
Background technology
Be applied to the polyester film material that solar cell backboard film is manufactured, as one of basic material of solar module, one of effect that it is important is to make polyester film material have low water vapor transmittance, to improve the service life of solar cell, this research work is subject to people's great attention always.In this field, much research adopts diverse ways to solve solar energy polyester film water vapor barrier property, insulating properties, dimensional stability, wet and heat ageing resistant and anti-flammability.In prior art, CN103022192A discloses a kind of high reflectance solar cell backboard polyester for film film that adopts the MULTILAYER COMPOSITE such as barrier layer, hydrolysis layer, high reflectance hydrolysis layer to make, and the moisture-vapor transmission of its 250 μ m high reflectance solar cell backboard polyester for film film reaches 1.2g/m
2my god the level of (38 ℃, humidity 90%); But there is following defect in this technical scheme: (1) sandwich construction needs adhesive layer, and that adhesive layer is easy to is aging, directly causes solar energy backboard polyester film unstable properties; (2) complex structure, causes processed complex, also production cost is increased.
Summary of the invention
Object of the present invention is intended to overcome above-mentioned deficiency of the prior art, and low water vapor transmittance polyester film of a kind of acrylic type coating and preparation method thereof is provided.The present invention can effectively solve that existing solar cell backboard polyester for film film water vapor transmittance is in use high, barrier is poor, the problem of poor insulativity; The low water vapor transmittance polyester film of acrylic type coating that provides a kind of solar cell backboard film to use (be called for short: acrylic type coated film) and preparation method thereof.
Content of the present invention is: the low water vapor transmittance polyester film of a kind of acrylic type coating, it is characterized in that: this film is by PETG (being called for short PET) or poly-2,6-(ethylene naphthalate) (the being called for short PEN) biaxially oriented polyester film of preparing and the acrylic type gel coating that is coated in this film both side surface thereof form, and polyester film thickness is that 150～250 μ m, acrylic type gel coating thickness are 0.08～0.32 μ m.
In content of the present invention: described acrylic type gel coating be at polyester slice after extruder melting slab, longitudinal stretching film forming, adopt online coating method that acrylic type glue is coated on two surfaces of this film, then the coating obtaining through cross directional stretch, oven dry crosslinking curing and thermal finalization.
Another content of the present invention is: the preparation method of the low water vapor transmittance polyester film of a kind of acrylic type coating, is characterized in that comprising the following steps:
A, prepare acrylic type glue:
In the preparation container that can weigh, the deionized water that adds 50 weight portions, under agitation add 10～40 weight portions containing acrylic resin 40%(mass percentage content) water-soluble acrylic emulsion, continue to stir after 30 minutes, drip again (denier) pH adjusting agent N, N-dimethylethanolamine, make the pH=9.5 of water-soluble acrylic emulsion, under stirring, add successively 1.6～6.4 weight portion Nano silica sols, 0.5～1 weight portion surfactant, 0.2～0.5 weight portion levelling agent, 0.2～0.5 weight portion defoamer, add 0.02～0.4 weight portion curing agent, add again deionized water to total material to reach 100 weight portions, again drip (denier) N, N-dimethylethanolamine is adjusted pH to 9.5, stir again 30 minutes, make acrylic type glue,
Described Nano silica sol is nanometer grade silica emulsion, can be the LUDOX TM-50 trade mark product of U.S. GRACE company;
Described surfactant is nonionic APEO, can be the TERGITOL of LG-DOW company
tMtMN-6 trade mark product;
Described levelling agent is isopropyl alcohol;
Described defoamer is organic silicon polyether copolymer, can be German TEGO company
foamex825 trade mark product;
Described curing agent is melamine formaldehyde resin and isocyanates, can be NIKARAC MW-12LF trade mark product and the Bayer A.G of Japanese Sanwa Chemical Co., Ltd
trade mark product;
B, prepare the low water vapor transmittance polyester film of acrylic type coating:
Dried polyester slice is added to extruder melting at 265～300 ℃ of temperature, through extruding machine mold lip, extrude, slab on 12～20 ℃ of cold drums, and enter 3～5m length with 8～15m/ minute speed, the longitudinal stretching section of 65～95 ℃ stretches after 3.0 ± 0.8 times, now through the polyester film of longitudinal stretching, with the speed of 17.6～57m/ minute, enter cooling corona section, with being cooled to 15～45 ℃ 1～5 second, carry out sided corona treatment, polyester film through longitudinal stretching and sided corona treatment enters online apparatus for coating, the acrylic type glue that the online coating method of employing intaglio plate roller coat is prepared step a is coated with it, two face coat thickness of the polyester film after coating are respectively 0.08～0.32 μ m, through longitudinal stretching, it is long that polyester film after sided corona treatment and coating enters 5～9m, the preheating section that temperature is 100～135 ℃ is removed moisture, then long at 8～12m, the cross directional stretch section that temperature is 140～160 ℃ stretches 3.0 ± 0.8 times, long at 10～16m through temperature again, the heat-setting section sizing of 225～250 ℃ 0.2～1 minute, make coating crosslinking curing form fine and close coating, again through 60～80 ℃, 0.1～1 minute and the rolling after cooling in two stages at room temperature, make the low water vapor transmittance polyester film of acrylic type coating,
Described polyester slice is poliester chip or the section of poly-NDA glycol ester;
In another content of the present invention: in the low water vapor transmittance polyester film of acrylic type coating making described in step b, polyester film thickness is that 150～250 μ m, each acrylic type gel coating thickness are 0.08～0.32 μ m; Described acrylic type gel coating thickness can pass through to adjust applicator roll and polyester film relative velocity, and the clearance distance of pressure roller and applicator roll is controlled.
In another content of the present invention: described in step a containing acrylic resin 40%(mass percentage content) the pH of water-soluble acrylic emulsion be 8～10, particle diameter is 50～150nm, elongation at break 300～800%; Can be self-control water-soluble acrylic emulsion or Bayer A.G
xP2427 trade mark water-soluble acrylic product emulsion.
The preparation method of described self-control water-soluble acrylic emulsion is: adopt prior art, take EMA, n-butyl acrylate, acrylic acid, hydroxy propyl methacrylate, styrene is raw material, by emulsion polymerisation, prepares water-soluble acrylic emulsion; This water-soluble acrylic emulsion be white in color band blue light, excellent with polyester film adhesive force, pliability is good, water white transparency.
In the preparation of the low water vapor transmittance polyester film of acrylic type coating, the mass percentage content of the acrylic resin in acrylic type glue prepared by step a is preferably and is controlled at 4%～16%, can cause lower than 4% time coating weight not enough to such an extent as to can not be evenly distributed on film surface, on film, levelling is not good, apparent property is bad, coating layer thickness is uneven, unstable properties for coating higher than 16% time.
Compared with prior art, the present invention has following feature and beneficial effect:
(1) water soluble acrylic resin that the present invention uses contain polar group and compared with major rupture percentage elongation, have good water-solublely, coating, coating and the polyester film that can form one deck densification at film surface after coating has strong tack, coating has strong resistance to water meet the requirement of environmental protection after being dried;
(2) the present invention adopts online coating method, in polyester film surface, applies the glue-line that blocks water, and solves steam through the high problem of polyester film transmitance, and the acrylic type coated film water vapor transmittance making through the method can reach 0.8g/m
2my god (38 ℃, humidity 90%); Coating has increased the surface tension of polyester film, thereby has good caking property;
(3) adopt the present invention, acrylic type coated film coating layer thickness 0.08～0.32 μ m, thickness deviation is little, and outward appearance is good, stable performance;
(4) up to the present, not yet find to adopt by the first longitudinal stretching of polyester sheet and on polyester film, apply one deck aqueous fusion based acrylic resin through online coating method and block water after glue-line, again through cross directional stretch thermal finalization, low water vapor transmittance polyester film for solar cell backboard film of preparation and preparation method thereof; The used for solar batteries backboard membrane that adopts acrylic type coated film of the present invention to prepare has low water vapor transmittance, good caking property, and excellent barrier, thus greatly improve service life and the operating efficiency of backboard membrane;
(5) the inventive method adopts biaxial tension and online coating, and the method technique is simple, easy to operate, be easy to control, production efficiency is high, low production cost, minimizing environmental pollution, practical.
The specific embodiment
Embodiment given below intends so that the invention will be further described; but can not be interpreted as it is limiting the scope of the invention; some nonessential improvement and adjustment that person skilled in art makes the present invention according to the content of the invention described above, still belong to protection scope of the present invention.
The preparation of first's acrylic type glue
The acrylic type glue of embodiment 1～14 is prepared basic technology:
In the preparation container that can weigh, the deionized water that adds 50 weight portions, under agitation add 10～40 weight portions containing the water-soluble acrylic emulsion of acrylic resin 40%, continue to stir after 30 minutes, drip again denier pH adjusting agent N, N-dimethylethanolamine, make the pH=9.5 of water-soluble acrylic emulsion, under stirring, add successively 1.6～6.4 weight portion Nano silica sols, 0.5～1 weight portion surfactant, 0.2～0.5 weight portion levelling agent, 0.2～0.5 weight portion defoamer, add 0.02～0.4 weight portion curing agent, add again deionized water to total material to reach 100 weight portions, again drip denier N, N-dimethylethanolamine is adjusted pH to 9.5, stir again 30 minutes, make acrylic type glue.
Embodiment 1:
The acrylic type glue preparation formula 1 of the low water vapor transmittance coating of the present invention:
With above-mentioned formula and adopt the acrylic type glue of embodiment 1～14 to prepare basic technology to be mixed with acrylic type glue 1#.
Embodiment 2:
The acrylic type glue preparation formula 2 of the low water vapor transmittance coating of the present invention:
With above-mentioned formula and adopt the acrylic type glue of embodiment 1～14 to prepare basic technology to be mixed with acrylic type glue 2#.
Embodiment 3:
The acrylic type glue preparation formula 3 of the low water vapor transmittance coating of the present invention:
With above-mentioned formula and adopt the acrylic type glue of embodiment 1～14 to prepare basic technology to be mixed with acrylic type glue 3#.
Embodiment 4:
The acrylic type glue preparation formula 4 of the low water vapor transmittance coating of the present invention:
With above-mentioned formula and adopt the acrylic type glue of embodiment 1～14 to prepare basic technology to be mixed with acrylic type glue 4#.
Embodiment 5:
The acrylic type glue preparation formula 5 of the low water vapor transmittance coating of the present invention:
With above-mentioned formula and adopt the acrylic type glue of embodiment 1～14 to prepare basic technology to be mixed with acrylic type glue 5#.
Embodiment 6:
The acrylic type glue preparation formula 6 of the low water vapor transmittance coating of the present invention:
With above-mentioned formula and adopt the acrylic type glue of embodiment 1～14 to prepare basic technology to be mixed with acrylic type glue 6#.
Embodiment 7:
The acrylic type glue preparation formula 7 of the low water vapor transmittance coating of the present invention:
With above-mentioned formula and adopt the acrylic type glue of embodiment 1～14 to prepare basic technology to be mixed with acrylic type glue 7#.
Embodiment 8:
The acrylic type glue preparation formula 8 of the low water vapor transmittance coating of the present invention:
With above-mentioned formula and adopt the acrylic type glue of embodiment 1～14 to prepare basic technology to be mixed with acrylic type glue 8#.
Embodiment 9:
The acrylic type glue preparation formula 9 of the low water vapor transmittance coating of the present invention:
With above-mentioned formula and adopt the acrylic type glue of embodiment 1～14 to prepare basic technology to be mixed with acrylic type glue 9#.
Embodiment 10:
The acrylic type glue preparation formula 10 of the low water vapor transmittance coating of the present invention:
With above-mentioned formula and adopt the acrylic type glue of embodiment 1～14 to prepare basic technology to be mixed with acrylic type glue 10#.
Embodiment 11:
The acrylic type glue preparation formula 11 of the low water vapor transmittance coating of the present invention:
With above-mentioned formula and adopt the acrylic type glue of embodiment 1～14 to prepare basic technology to be mixed with acrylic type glue 11#.
Embodiment 12:
The acrylic type glue preparation formula 12 of the low water vapor transmittance coating of the present invention:
With above-mentioned formula and adopt the acrylic type glue of embodiment 1～14 to prepare basic technology to be mixed with acrylic type glue 12#.
Embodiment 13:
The acrylic type glue preparation formula 13 of the low water vapor transmittance coating of the present invention:
With above-mentioned formula and adopt the acrylic type glue of embodiment 1～14 to prepare basic technology to be mixed with acrylic type glue 13#.
Embodiment 14:
The acrylic type glue preparation formula 14 of the low water vapor transmittance coating of the present invention:
With above-mentioned formula and adopt the acrylic type glue of embodiment 1～14 to prepare basic technology to be mixed with acrylic type glue 14#.
The preparation of second portion acrylic type coated film
Basic technology prepared by embodiment 15～28 acrylic type coated film:
Dried polyester slice is added to extruder melting at 265～300 ℃ of temperature, through extruding machine mold lip, extrude, slab on 12～20 ℃ of cold drums, and enter 3～5m length with 8～15m/ minute speed, the longitudinal stretching section of 65～95 ℃ stretches after 3.0 ± 0.8 times, now through the polyester film of longitudinal stretching, with the speed of 17.6～57m/ minute, enter cooling corona section, with being cooled to 15～45 ℃ 1～5 second, carry out sided corona treatment, polyester film through longitudinal stretching and sided corona treatment enters online apparatus for coating, the acrylic type glue that the coating method of employing intaglio plate roller coat is prepared embodiment first is coated with it, polyester film both sides coating layer thickness after coating is respectively 0.08～0.32 μ m, through longitudinal stretching, it is long that polyester film after sided corona treatment and coating enters 5～9m, the preheating section that temperature is 100～135 ℃ is removed moisture, then long at 8～12m, the cross directional stretch section that temperature is 140～160 ℃ stretches 3.0 ± 0.8 times, long at 10～16m through temperature again, the heat-setting section sizing of 225～250 ℃ 0.2～1 minute, make coating crosslinking curing form fine and close coating, again through 60～80 ℃, 0.1～1 minute and the rolling after cooling in two stages at room temperature, obtain acrylic type coated film finished product.
The performance test methods of embodiment 15～28 acrylic type coated film is as follows:
Moisture-vapor transmission: according to GB/T21529-2008 standard, adopt the W3/300 type water vapor permeation rate tester of Labthink Instruments Co., Ltd. to test film.
Adhesive force: according to GB-T9286-1998 standard, the hundred lattice methods of employing are tested acrylic acid coatings.
The performance test results of embodiment 15～28 acrylic type coated film sees the following form:
The performance indications table of acrylic type coated film (embodiment 15～28)
Note:
1, in upper table, products A, B and C are respectively polyester (PET) film product of manufacturing for solar cell backboard film of A, B, the market sale of C tri-companies.
2, the adhesive force in upper table is 0 grade, 1 grade, better by the known coating of GB-T9286-1998 standard-required and PET adhesive force.0 grade of adhesive force is better than 1 grade.
The coating layer thickness on the positive and negative surface that 3, the coating I in upper table, II are respectively polyester film.
Embodiment 29～35:
The low water vapor transmittance polyester film of a kind of acrylic type coating, this film is by PETG (being called for short PET) or poly-2,6-(ethylene naphthalate) (the being called for short PEN) biaxially oriented polyester film of preparing and the acrylic type gel coating that is coated in this film both side surface thereof form, and polyester film thickness is that 150～250 μ m, acrylic type gel coating thickness are 0.08～0.32 μ m;
Concrete thickness in embodiment 29～35 (unit: μ m) see the following form:
Embodiment 36:
The low water vapor transmittance polyester film of a kind of acrylic type coating, described acrylic type gel coating be at polyester slice after extruder melting slab, longitudinal stretching film forming, adopt online coating method that acrylic type glue is coated on two surfaces of this film, then the coating obtaining through cross directional stretch, oven dry crosslinking curing and thermal finalization; Arbitrary in the other the same as in Example 2 9～35, omit.
Embodiment 37:
A preparation method for the low water vapor transmittance polyester film of acrylic type coating, comprises the following steps:
A, prepare acrylic type glue:
In the preparation container that can weigh, the deionized water that adds 50 weight portions, under agitation add 25 weight portions containing acrylic resin 40%(mass percentage content) water-soluble acrylic emulsion, continue to stir after 30 minutes, drip again (denier) pH adjusting agent N, N-dimethylethanolamine, make the pH=9.5 of water-soluble acrylic emulsion, under stirring, add successively 4 weight portions (unit: kilogram, same afterwards) Nano silica sol, 0.7 weight portion surfactant, 0.3 weight portion levelling agent, 0.3 weight portion defoamer, add 0.2 weight portion curing agent, add again deionized water to total material to reach 100 weight portions, again drip (denier) N, N-dimethylethanolamine is adjusted pH to 9.5, stir again 30 minutes, make acrylic type glue,
Described Nano silica sol is nanometer grade silica emulsion, can be the LUDOX TM-50 trade mark product of U.S. GRACE company;
Described surfactant is nonionic APEO, can be the TERGITOL of LG-DOW company
tMtMN-6 trade mark product;
Described levelling agent is isopropyl alcohol;
Described defoamer is organic silicon polyether copolymer, can be German TEGO company
foamex825 trade mark product;
Described curing agent is melamine formaldehyde resin and isocyanates, can be NIKARAC MW-12LF trade mark product and the Bayer A.G of Japanese Sanwa Chemical Co., Ltd
trade mark product;
B, prepare the low water vapor transmittance polyester film of acrylic type coating:
Dried polyester slice is added to extruder melting at 282 ℃ of temperature, through extruding machine mold lip, extrude, slab on 16 ℃ of cold drums, and enter 4m length with 12m/ minute speed, the longitudinal stretching section of 80 ℃ stretches after 3.0 ± 0.8 times, now through the polyester film of longitudinal stretching, with the speed of 37.3m/ minute, enter cooling corona section, with being cooled to 15～45 ℃ 3 seconds, carry out sided corona treatment, polyester film through longitudinal stretching and sided corona treatment enters online apparatus for coating, the acrylic type glue that the online coating method of employing intaglio plate roller coat is prepared step a is coated with it, two face coat thickness of the polyester film after coating are respectively 0.20 μ m, through longitudinal stretching, it is long that polyester film after sided corona treatment and coating enters 7m, the preheating section that temperature is 115 ℃ is removed moisture, then long at 10m, the cross directional stretch section that temperature is 150 ℃ stretches 3.0 ± 0.8 times, long at 13m through temperature again, the heat-setting section sizing of 235 ℃ 0.6 minute, make coating crosslinking curing form fine and close coating, again through 70 ℃, 0.5 minute and the rolling after cooling in two stages at room temperature, make the low water vapor transmittance polyester film of acrylic type coating,
Described polyester slice is poliester chip or the section of poly-NDA glycol ester;
Embodiment 38～44:
A preparation method for the low water vapor transmittance polyester film of acrylic type coating, comprises the following steps:
A, prepare acrylic type glue:
In the preparation container that can weigh, the deionized water that adds 50 weight portions, under agitation add 10～40 weight portions containing acrylic resin 40%(mass percentage content) water-soluble acrylic emulsion, continue to stir after 30 minutes, drip again (denier) pH adjusting agent N, N-dimethylethanolamine, make the pH=9.5 of water-soluble acrylic emulsion, under stirring, add successively 1.6～6.4 weight portion Nano silica sols, 0.5～1 weight portion surfactant, 0.2～0.5 weight portion levelling agent, 0.2～0.5 weight portion defoamer, add 0.02～0.4 weight portion curing agent, add again deionized water to total material to reach 100 weight portions, again drip (denier) N, N-dimethylethanolamine is adjusted pH to 9.5, stir again 30 minutes, make acrylic type glue,
The consumption of each component in embodiment 38～44 (unit of weight portion: kilogram) see the following form:
Described Nano silica sol is nanometer grade silica emulsion, can be the LUDOX TM-50 trade mark product of U.S. GRACE company;
Described surfactant is nonionic APEO, can be the TERGITOL of LG-DOW company
tMtMN-6 trade mark product;
Described levelling agent is isopropyl alcohol;
Described defoamer is organic silicon polyether copolymer, can be German TEGO company
foamex825 trade mark product;
Described curing agent is melamine formaldehyde resin and isocyanates, can be NIKARAC MW-12LF trade mark product and the Bayer A.G of Japanese Sanwa Chemical Co., Ltd
trade mark product;
B, prepare the low water vapor transmittance polyester film of acrylic type coating:
Dried polyester slice is added to extruder melting at 265～300 ℃ of temperature, through extruding machine mold lip, extrude, slab on 12～20 ℃ of cold drums, and enter 3～5m length with 8～15m/ minute speed, the longitudinal stretching section of 65～95 ℃ stretches after 3.0 ± 0.8 times, now through the polyester film of longitudinal stretching, with the speed of 17.6～57m/ minute, enter cooling corona section, with being cooled to 15～45 ℃ 1～5 second, carry out sided corona treatment, polyester film through longitudinal stretching and sided corona treatment enters online apparatus for coating, the acrylic type glue that the online coating method of employing intaglio plate roller coat is prepared step a is coated with it, two face coat thickness of the polyester film after coating are respectively 0.08～0.32 μ m, through longitudinal stretching, it is long that polyester film after sided corona treatment and coating enters 5～9m, the preheating section that temperature is 100～135 ℃ is removed moisture, then long at 8～12m, the cross directional stretch section that temperature is 140～160 ℃ stretches 3.0 ± 0.8 times, long at 10～16m through temperature again, the heat-setting section sizing of 225～250 ℃ 0.2～1 minute, make coating crosslinking curing form fine and close coating, again through 60～80 ℃, 0.1～1 minute and the rolling after cooling in two stages at room temperature, make the low water vapor transmittance polyester film of acrylic type coating,
Described polyester slice is poliester chip or the section of poly-NDA glycol ester.
Embodiment 45～51:
The preparation method of the low water vapor transmittance polyester film of a kind of acrylic type coating, in the low water vapor transmittance polyester film of acrylic type coating making described in step b, polyester film thickness is that 150～250 μ m, each acrylic type gel coating thickness are 0.08～0.32 μ m; Described acrylic type gel coating thickness can pass through to adjust applicator roll and polyester film relative velocity, and the clearance distance of pressure roller and applicator roll is controlled;
Concrete thickness in embodiment 45～51 (unit: μ m) see the following form:
Arbitrary in the other the same as in Example 3 7～44, omit.
In above-described embodiment 37～51: described in step a containing acrylic resin 40%(mass percentage content) the pH of water-soluble acrylic emulsion be 8～10, particle diameter is 50～150nm, elongation at break 300～800%; Can be self-control water-soluble acrylic emulsion or Bayer A.G
xP2427 trade mark water-soluble acrylic product emulsion.
The preparation method of described self-control water-soluble acrylic emulsion is: adopt prior art, take EMA, n-butyl acrylate, acrylic acid, hydroxy propyl methacrylate, styrene is raw material, by emulsion polymerisation, prepares water-soluble acrylic emulsion; This water-soluble acrylic emulsion be white in color band blue light, excellent with polyester film adhesive force, pliability is good, water white transparency.
In above-described embodiment 31～45: in the preparation of the low water vapor transmittance polyester film of acrylic type coating, the mass percentage content of the acrylic resin in acrylic type glue prepared by step a is preferably and is controlled at 4%～16%, can cause lower than 4% time coating weight not enough to such an extent as to can not be evenly distributed on film surface, on film, levelling is not good, apparent property is bad, coating layer thickness is uneven, unstable properties for coating higher than 16% time.
In above-described embodiment: in the percentage adopting, do not indicate especially, be quality (weight) percentage; In the ratio adopting, do not indicate especially, be weight (quality) ratio; Described weight (quality) part can be all kilogram or ton.
In above-described embodiment: the technological parameter in each step (temperature, time, concentration, length, speed etc.) and each amounts of components numerical value etc. are scope, and any point is all applicable.
The not concrete same prior art of technology contents of narrating in content of the present invention and above-described embodiment, described raw material are commercially available prod.
The invention is not restricted to above-described embodiment, all can implement and have described good result described in content of the present invention.
Claims (5)
1. the low water vapor transmittance polyester film of acrylic type coating, it is characterized in that: this film is by PETG or poly-2, biaxially oriented polyester film prepared by 6-(ethylene naphthalate) and the acrylic type gel coating that is coated in this film both side surface thereof form, and polyester film thickness is that 150～250 μ m, acrylic type gel coating thickness are 0.08～0.32 μ m.
2. by the low water vapor transmittance polyester film of acrylic type coating claimed in claim 1, it is characterized in that: described acrylic type gel coating be at polyester slice after extruder melting slab, longitudinal stretching film forming, adopt online coating method that acrylic type glue is coated on two surfaces of this film, then the coating obtaining through cross directional stretch, oven dry crosslinking curing and thermal finalization.
3. a preparation method for the low water vapor transmittance polyester film of acrylic type coating, is characterized in that comprising the following steps:
A, prepare acrylic type glue:
In the preparation container that can weigh, the deionized water that adds 50 weight portions, under agitation add 10～40 weight portions containing the water-soluble acrylic emulsion of acrylic resin 40%, continue to stir after 30 minutes, drip again pH adjusting agent N, N-dimethylethanolamine, make pH=9.5, under stirring, add successively 1.6～6.4 weight portion Nano silica sols, 0.5～1 weight portion surfactant, 0.2～0.5 weight portion levelling agent, 0.2～0.5 weight portion defoamer, add 0.02～0.4 weight portion curing agent, add again deionized water to total material to reach 100 weight portions, again drip N, N-dimethylethanolamine is adjusted pH to 9.5, stir again 30 minutes, make acrylic type glue,
Described Nano silica sol is nanometer grade silica emulsion;
Described surfactant is nonionic APEO;
Described levelling agent is isopropyl alcohol;
Described defoamer is organic silicon polyether copolymer;
Described curing agent is melamine formaldehyde resin and isocyanates;
B, prepare the low water vapor transmittance polyester film of acrylic type coating:
Dried polyester slice is added to extruder melting at 265～300 ℃ of temperature, through extruding machine mold lip, extrude, slab on 12～20 ℃ of cold drums, and enter 3～5m length with 8～15m/ minute speed, the longitudinal stretching section of 65～95 ℃ stretches after 3.0 ± 0.8 times, now through the polyester film of longitudinal stretching, with the speed of 17.6～57m/ minute, enter cooling corona section, with being cooled to 15～45 ℃ 1～5 second, carry out sided corona treatment, polyester film through longitudinal stretching and sided corona treatment enters online apparatus for coating, the acrylic type glue that the online coating method of employing intaglio plate roller coat is prepared step a is coated with it, two face coat thickness of the polyester film after coating are respectively 0.08～0.32 μ m, through longitudinal stretching, it is long that polyester film after sided corona treatment and coating enters 5～9m, the preheating section that temperature is 100～135 ℃ is removed moisture, then long at 8～12m, the cross directional stretch section that temperature is 140～160 ℃ stretches 3.0 ± 0.8 times, long at 10～16m through temperature again, the heat-setting section sizing of 225～250 ℃ 0.2～1 minute, make coating crosslinking curing form fine and close coating, again through 60～80 ℃, 0.1～1 minute and the rolling after cooling in two stages at room temperature, make the low water vapor transmittance polyester film of acrylic type coating,
Described polyester slice is poliester chip or the section of poly-NDA glycol ester.
4. by the preparation method of the low water vapor transmittance polyester film of acrylic type coating described in claim 3, it is characterized in that: in the low water vapor transmittance polyester film of acrylic type coating making described in step b, polyester film thickness is that 150～250 μ m, each acrylic type gel coating thickness are 0.08～0.32 μ m.
5. by the preparation method of the low water vapor transmittance polyester film of acrylic type coating described in claim 3 or 4, it is characterized in that: described in step a containing the pH of the water-soluble acrylic emulsion of acrylic resin 40% be 8～10, particle diameter is 50～150nm, elongation at break 300～800%.
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| CN201310740044.3A CN103753925B (en) | 2013-12-27 | 2013-12-27 | A kind of acrylic type coating low water vapor transmittance mylar and preparation method thereof |
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| CN104513403A (en) * | 2014-12-19 | 2015-04-15 | 佛山杜邦鸿基薄膜有限公司 | BOPET film with water-based anti-reflection coating coated online and preparation method of BOPET film |
| CN105585726A (en) * | 2015-12-25 | 2016-05-18 | 江苏东材新材料有限责任公司 | High-barrier polyester film and preparation method thereof |
| CN108779349A (en) * | 2016-03-28 | 2018-11-09 | 陶氏环球技术有限责任公司 | The method of the freeze-thaw stability of composition, water-based paint compositions and improvement water-based paint compositions |
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| CN104513403A (en) * | 2014-12-19 | 2015-04-15 | 佛山杜邦鸿基薄膜有限公司 | BOPET film with water-based anti-reflection coating coated online and preparation method of BOPET film |
| CN105585726A (en) * | 2015-12-25 | 2016-05-18 | 江苏东材新材料有限责任公司 | High-barrier polyester film and preparation method thereof |
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| CN103753925B (en) | 2016-08-17 |
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