CN103753925B - A kind of acrylic type coating low water vapor transmittance mylar and preparation method thereof - Google Patents
A kind of acrylic type coating low water vapor transmittance mylar and preparation method thereof Download PDFInfo
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- CN103753925B CN103753925B CN201310740044.3A CN201310740044A CN103753925B CN 103753925 B CN103753925 B CN 103753925B CN 201310740044 A CN201310740044 A CN 201310740044A CN 103753925 B CN103753925 B CN 103753925B
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Abstract
The invention discloses a kind of acrylic type coating low water vapor transmittance mylar, it is characterized in that: this thin film is by polyethylene terephthalate or poly-2, biaxially oriented polyester film prepared by 6 (ethylene naphthalate)s and be coated in the acrylic type gel coating composition of this film both side surface, mylar thickness is that 150～250 μm, acrylic type coating thickness are 0.08～0.32 μm.Acrylic type glue is made up of water-soluble acrylic emulsion, Nano silica sol, surfactant, levelling agent, defoamer, firming agent and deionized water；After polyester slice extruded machine melting slab, longitudinal stretching film forming, use online coating method to be coated on two surfaces of this film by acrylic type glue, then prepare acrylic type coating low water vapor transmittance mylar through cross directional stretch, drying crosslinking curing and thermal finalization.Thin film of the present invention can be used for manufacturing solar cell backboard film or the mylar goods of other low water vapor transmittance of need.
Description
Technical field
The invention belongs to organic high molecular compound and preparation thereof, relate to a kind of low water of acrylic type coating
Vapour transmitance mylar and preparation method thereof.The low steam of acrylic type coating prepared by the present invention passes through
Rate mylar is applicable to manufacture solar cell backboard film or the polyester of other low water vapor transmittance of need
Film article.
Background technology
It is applied to the Mylar material that solar cell backboard film manufactures, as solar module
One of basic material, one of its important effect is to make Mylar material have low steam to pass through
Rate, to improve the service life of solaode, this research work is constantly subjected to the great attention of people.
Different methods is used to solve solar energy mylar water vapor barrier property, absolutely in this field many research
Edge, dimensional stability, wet and heat ageing resistant and anti-flammability.In prior art, CN103022192A
Disclose the one that MULTILAYER COMPOSITE such as using barrier layer, hydrolysis layer, high reflectance hydrolysis layer makes
High reflectance solar cell backboard polyester for film thin film, its 250 μm high reflectance solaode
The moisture-vapor transmission of backboard membrane mylar reaches 1.2g/m2My god (38 DEG C, humidity 90%)
Level；But this technical scheme has following defects that (1) multiple structure needs adhesive layer, and adhesive layer
It is prone to aging, directly results in solar energy backboard mylar unstable properties；(2) structure is complicated, leads
Cause processed complex, also make production cost increase.
Summary of the invention
The purpose of the present invention is intended to overcome above-mentioned deficiency of the prior art, it is provided that a kind of acrylic type is coated with
Low water vapor transmittance mylar of layer and preparation method thereof.The present invention can effectively solve existing solar energy
Battery back-sheet polyester for film thin film water vapor transmittance in use is high, barrier is poor, insulating properties
The problem of difference；The low water vapor transmittance of acrylic type coating providing a kind of solar cell backboard film gathers
Ester film (being called for short: acrylic type coated film) and preparation method thereof.
Present disclosure is: a kind of acrylic type coating low water vapor transmittance mylar, its feature
It is: this thin film is by polyethylene terephthalate (being called for short PET) or poly-2,6-naphthalenedicarboxylic acid second two
Biaxially oriented polyester film prepared by alcohol ester (be called for short PEN) and be coated in the third of this film both side surface
Olefin(e) acid type gel coating forms, and mylar thickness is 150～250 μm, acrylic type coating thickness
It is 0.08～0.32 μm.
In present disclosure: described acrylic type gel coating is to cast in polyester slice extruded machine melting
After sheet, longitudinal stretching film forming, use online coating method that acrylic type glue is coated in two of this film
On surface, then the coating obtained through cross directional stretch, drying crosslinking curing and thermal finalization.
Another content of the present invention is: the system of a kind of acrylic type coating low water vapor transmittance mylar
Preparation Method, is characterized in that comprising the following steps:
A, prepare acrylic type glue:
In the preparation container that can weigh, add the deionized water of 50 weight portions, under agitation add
Enter 10～40 weight portions water soluble propene's yogurt containing acrylic resin 40% (mass percentage content)
Liquid, after continuing stirring 30 minutes, then drips (denier) pH adjusting agent N, N-dimethylethanolamine,
Make under the pH=9.5 of water-soluble acrylic emulsion, stirring, to be sequentially added into 1.6～6.4 weight portion nano-silicons
Colloidal sol, 0.5～1 parts surfactant, 0.2～0.5 weight portion levelling agent, 0.2～0.5 weight
Amount part defoamer, adds 0.02～0.4 weight portion firming agent, adds deionized water and reach to total material
To 100 weight portions, dropping (denier) N, N-dimethylethanolamine adjusts pH to 9.5 again, then stirs
Mix 30 minutes, i.e. prepare acrylic type glue；
Described Nano silica sol is nanometer grade silica emulsion, can be GRACE company of the U.S.
LUDOX TM-50 trade mark product；
Described surfactant is nonionic polyoxyethylene ether, can be LG-DOW company
TERGITOLTMTMN-6 trade mark product；
Described levelling agent is isopropanol；
Described defoamer is organic silicon polyether copolymer, can be TEGO company of Germany
Foamex 825 trade mark product；
Described firming agent is melamine formaldehyde resin and isocyanates, can be Japan three and chemistry
The NIKARAC MW-12LF trade mark product of Co., Ltd. and Bayer A.G305
Trade mark product；
B, prepare acrylic type coating low water vapor transmittance mylar:
Dried polyester slice is added extruder melting at a temperature of 265～300 DEG C, extruded machine
Mould lip is extruded, slab on 12～20 DEG C of cold drums, and with 8～15m/ minute speed enter 3～
5m length, the longitudinal stretching section of 65～95 DEG C stretch 3.0 ± 0.8 times, now through the polyester of longitudinal stretching
Thin film enters cooling corona section with the speed of 17.6～57m/ minute, with within 1～5 second, be cooled to 15～
45 DEG C, carry out sided corona treatment, enter online painting through the mylar of longitudinal stretching and sided corona treatment and arrange
Putting, it is coated with by the acrylic type glue using online coating method step a of intaglio plate roller coat to prepare
Cloth, two face coat thickness of the mylar after coating are respectively 0.08～0.32 μm, through vertical
Mylar after stretching, sided corona treatment and coating enters 5～9m length, temperature 100～135 DEG C
Preheating section removes moisture, and then the cross directional stretch section 8～12m length, temperature 140～160 DEG C stretches
3.0 ± 0.8 times, then through 10～16m length, temperature 225～250 DEG C heat-setting section shape 0.2～
1 minute, make coating crosslinking curing formed densification coating, then through 60～80 DEG C, 0.1～1 minute and
The at room temperature rolling after cooling in two stages, i.e. prepares acrylic type coating low water vapor transmittance polyester
Thin film；
Described polyester slice is poliester chip or poly-2,6-naphthalenedicarboxylic acid second two
Alcohol ester is cut into slices；
In another content of the present invention: the low water vapor transmittance of acrylic type coating prepared described in step b
In mylar, mylar thickness is that 150～250 μm, each acrylic type coating thickness are
0.08～0.32 μm；Described acrylic type coating thickness can be by adjusting applicator roll and polyester
Film relative velocity, and the clearance distance of pressure roller and applicator roll controls.
In another content of the present invention: described in step a, containing acrylic resin 40%, (mass percent contains
Amount) the pH of water-soluble acrylic emulsion be 8～10, particle diameter be 50～150nm, elongation at break
300～800%；Can be self-control water-soluble acrylic emulsion or Bayer A.G
XP 2427 trade mark water-soluble acrylic product emulsion.
The preparation method of described self-control water-soluble acrylic emulsion is: use prior art, with methyl-prop
Olefin(e) acid ethyl ester, n-butyl acrylate, acrylic acid, Hydroxypropyl methacrylate, styrene are raw material,
Water-soluble acrylic emulsion is prepared by emulsion polymerization；This white band of water-soluble acrylic emulsion is blue
Light and mylar adhesive force are excellent, pliability is good, water white transparency.
In the preparation of acrylic type coating low water vapor transmittance mylar, propylene prepared by step a
The mass percentage content of the acrylic resin in acid type glue is preferably controlled at 4%～16%, is less than
Coating weight can be caused when 4% not enough to such an extent as to film surface can not be evenly distributed on, be coated with during higher than 16%
On thin film, levelling is the best, apparent property is bad, coating layer thickness is uneven, unstable properties for layer.
Compared with prior art, the present invention has features and a beneficial effect:
(1) water soluble acrylic resin that the present invention uses contains polar group and relatively major rupture is stretched
Long rate, there is good water solublity, after coating, one layer of fine and close coating, painting can be formed at film surface
Layer and mylar have strong tack, coating has strong resistance to water after drying and reaches environmental protection
Requirement；
(2) present invention uses online coating method, applies, in polyester film surface, the glue-line that blocks water, and solves
Certainly steam is through the high problem of mylar transmitance, through the acrylic type coated film steam that the method prepares
Transmitance can reach 0.8g/m2My god (38 DEG C, humidity 90%)；Coating adds the table of mylar
Surface tension, thus there is good caking property；
(3) using the present invention, acrylic type coated film coating layer thickness 0.08～0.32 μm, thickness is public
Difference is little, and outward appearance is good, stable performance；
(4) up to the present, not yet find to use by polyester sheet elder generation longitudinal stretching and be coated with through online
Mode for cloth applies one layer of aqueous fusion acrylic resin on mylar and blocks water after glue-line, then through laterally drawing
Stretch and thermal finalization, the low water vapor transmittance mylar for solar cell backboard film of preparation and
Preparation method；The backboard membrane used for solar batteries using acrylic type coated film of the present invention to prepare has low
Water vapor transmittance, good caking property, excellent barrier, thus it is greatly improved the use of backboard membrane
Life-span and work efficiency；
(5) the inventive method uses biaxial tension and online coating, and the method technique is simple, operation
Convenient, easily controllable, production efficiency is high, low production cost, minimizing environmental pollution, practical.
Detailed description of the invention
Example given below is intended so that the invention will be further described, but is not to be construed as this
The restriction of invention protection domain, person skilled in art according to the content of the invention described above to the present invention
The nonessential improvement of some made and adjustment, still fall within protection scope of the present invention.
The preparation of Part I acrylic type glue
Basic technology prepared by the acrylic type glue of embodiment 1～14:
In the preparation container that can weigh, add the deionized water of 50 weight portions, under agitation add
Enter 10～40 weight portions water-soluble acrylic emulsion containing acrylic resin 40%, continue stirring 30 points
Zhong Hou, then drip denier pH adjusting agent N, N-dimethylethanolamine, make water-soluble acrylic emulsion
PH=9.5, be sequentially added into 1.6～6.4 weight portion Nano silica sols, 0.5～1 weight portion under stirring
Surfactant, 0.2～0.5 weight portion levelling agent, 0.2～0.5 weight portion defoamer, add 0.02～
0.4 weight portion firming agent, adds deionized water and reaches 100 weight portions to total material, again drip
Denier N, N-dimethylethanolamine adjusts pH to 9.5, is stirred for 30 minutes, prepares acrylic type glue.
Embodiment 1:
Formula 1 prepared by the acrylic type glue of the present invention low water vapor transmittance coating:
With above-mentioned formula and use the acrylic type glue of embodiment 1～14 to prepare basic technology to be configured to third
Olefin(e) acid type glue 1#.
Embodiment 2:
Formula 2 prepared by the acrylic type glue of the present invention low water vapor transmittance coating:
With above-mentioned formula and use the acrylic type glue of embodiment 1～14 to prepare basic technology to be configured to third
Olefin(e) acid type glue 2#.
Embodiment 3:
Formula 3 prepared by the acrylic type glue of the present invention low water vapor transmittance coating:
With above-mentioned formula and use the acrylic type glue of embodiment 1～14 to prepare basic technology to be configured to third
Olefin(e) acid type glue 3#.
Embodiment 4:
Formula 4 prepared by the acrylic type glue of the present invention low water vapor transmittance coating:
With above-mentioned formula and use the acrylic type glue of embodiment 1～14 to prepare basic technology to be configured to third
Olefin(e) acid type glue 4#.
Embodiment 5:
Formula 5 prepared by the acrylic type glue of the present invention low water vapor transmittance coating:
With above-mentioned formula and use the acrylic type glue of embodiment 1～14 to prepare basic technology to be configured to third
Olefin(e) acid type glue 5#.
Embodiment 6:
Formula 6 prepared by the acrylic type glue of the present invention low water vapor transmittance coating:
With above-mentioned formula and use the acrylic type glue of embodiment 1～14 to prepare basic technology to be configured to third
Olefin(e) acid type glue 6#.
Embodiment 7:
Formula 7 prepared by the acrylic type glue of the present invention low water vapor transmittance coating:
With above-mentioned formula and use the acrylic type glue of embodiment 1～14 to prepare basic technology to be configured to third
Olefin(e) acid type glue 7#.
Embodiment 8:
Formula 8 prepared by the acrylic type glue of the present invention low water vapor transmittance coating:
With above-mentioned formula and use the acrylic type glue of embodiment 1～14 to prepare basic technology to be configured to third
Olefin(e) acid type glue 8#.
Embodiment 9:
Formula 9 prepared by the acrylic type glue of the present invention low water vapor transmittance coating:
With above-mentioned formula and use the acrylic type glue of embodiment 1～14 to prepare basic technology to be configured to third
Olefin(e) acid type glue 9#.
Embodiment 10:
Formula 10 prepared by the acrylic type glue of the present invention low water vapor transmittance coating:
With above-mentioned formula and use the acrylic type glue of embodiment 1～14 to prepare basic technology to be configured to third
Olefin(e) acid type glue 10#.
Embodiment 11:
Formula 11 prepared by the acrylic type glue of the present invention low water vapor transmittance coating:
With above-mentioned formula and use the acrylic type glue of embodiment 1～14 to prepare basic technology to be configured to third
Olefin(e) acid type glue 11#.
Embodiment 12:
Formula 12 prepared by the acrylic type glue of the present invention low water vapor transmittance coating:
With above-mentioned formula and use the acrylic type glue of embodiment 1～14 to prepare basic technology to be configured to third
Olefin(e) acid type glue 12#.
Embodiment 13:
Formula 13 prepared by the acrylic type glue of the present invention low water vapor transmittance coating:
With above-mentioned formula and use the acrylic type glue of embodiment 1～14 to prepare basic technology to be configured to third
Olefin(e) acid type glue 13#.
Embodiment 14:
Formula 14 prepared by the acrylic type glue of the present invention low water vapor transmittance coating:
With above-mentioned formula and use the acrylic type glue of embodiment 1～14 to prepare basic technology to be configured to third
Olefin(e) acid type glue 14#.
The preparation of Part II acrylic type coated film
Basic technology prepared by embodiment 15～28 acrylic type coated film:
Dried polyester slice is added extruder melting at a temperature of 265～300 DEG C, extruded machine
Mould lip is extruded, slab on 12～20 DEG C of cold drums, and with 8～15m/ minute speed enter 3～
After 5m length, the longitudinal stretching section of 65～95 DEG C stretch 3.0 ± 0.8 times, now gathering through longitudinal stretching
Ester film enters cooling corona section with the speed of 17.6～57m/ minute, is cooled to 1～5 second
15～45 DEG C, carry out sided corona treatment, through the online painting of mylar entrance of longitudinal stretching and sided corona treatment
Cloth apparatus, uses the acrylic type glue pair that embodiment Part I is prepared by the coating method of intaglio plate roller coat
It is coated, and the mylar both sides coating layer thickness after coating is respectively 0.08～0.32 μm, warp
Mylar after longitudinal stretching, sided corona treatment and coating enters 5～9m length, temperature 100～135 DEG C
Preheating section remove moisture, then the cross directional stretch section 8～12m length, temperature 140～160 DEG C is drawn
Stretch 3.0 ± 0.8 times, then through temperature 10～16m length, 225～250 DEG C heat-setting section sizing 0.2～
1 minute, make coating crosslinking curing formed densification coating, then through 60～80 DEG C, 0.1～1 minute and
The at room temperature rolling after cooling in two stages, obtains 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/T 21529-2008 standard, uses Jinan blue streak mechanical & electrical technology
Thin film is tested by the W3/300 type water vapor permeation rate tester of company limited.
Adhesive force: according to GB-T9286-1998 standard, uses hundred lattice methods to survey acrylic acid coatings
Examination.
The performance test results of embodiment 15～28 acrylic type coated film see table:
The performance indications table (embodiment 15～28) of acrylic type coated film
Note:
1, product A in upper table, B and C be respectively the market sale of A, B, C tri-companies for too
Polyester (PET) film product that sun energy battery back-sheet film manufactures.
2, the adhesive force in upper table 0 grade, 1 grade, by GB-T9286-1998 standard-required understand coating
Preferable with PET film adhesive force.Adhesive force 0 grade is better than 1 grade.
3, the coating layer thickness on coating I, the II respectively positive and negative surface of mylar in upper table.
Embodiment 29～35:
A kind of acrylic type coating low water vapor transmittance mylar, this thin film is by poly terephthalic acid second
Prepared by diol ester (being called for short PET) or poly-2,6-(ethylene naphthalate) (being called for short PEN) two-way
Oriented polyester film and be coated in this film both side surface acrylic type gel coating composition, mylar
Thickness is that 150～250 μm, acrylic type coating thickness are 0.08～0.32 μm；
Concrete thickness (unit: μm) in embodiment 29～35 see table:
Embodiment 36:
A kind of acrylic type coating low water vapor transmittance mylar, described acrylic type gel coating be
After polyester slice extruded machine melting slab, longitudinal stretching film forming, use online coating method by propylene
Acid type glue is coated on two surfaces of this film, then through cross directional stretch, drying crosslinking curing and thermal finalization
And the coating obtained；In the other the same as in Example 2 9～35 arbitrary, omit.
Embodiment 37:
The preparation method of a kind of acrylic type coating low water vapor transmittance mylar, including following step
Rapid:
A, prepare acrylic type glue:
In the preparation container that can weigh, add the deionized water of 50 weight portions, under agitation add
Enter 25 weight portions water-soluble acrylic emulsion containing acrylic resin 40% (mass percentage content),
After continuing stirring 30 minutes, then drip (denier) pH adjusting agent N, N-dimethylethanolamine, make
The pH=9.5 of water-soluble acrylic emulsion, be sequentially added under stirring 4 weight portions (unit: kilogram, after
Nano silica sol, 0.7 parts surfactant, 0.3 weight portion levelling agent, 0.3 weight portion together)
Defoamer, adds 0.2 weight portion firming agent, adds deionized water and reaches 100 weight to total material
Part, dropping (denier) N, N-dimethylethanolamine adjusts pH to 9.5 again, is stirred for 30 minutes,
I.e. prepare acrylic type glue；
Described Nano silica sol is nanometer grade silica emulsion, can be GRACE company of the U.S.
LUDOX TM-50 trade mark product；
Described surfactant is nonionic polyoxyethylene ether, can be LG-DOW company
TERGITOLTMTMN-6 trade mark product；
Described levelling agent is isopropanol；
Described defoamer is organic silicon polyether copolymer, can be TEGO company of Germany
Foamex 825 trade mark product；
Described firming agent is melamine formaldehyde resin and isocyanates, can be Japan three and chemistry
The NIKARAC MW-12LF trade mark product of Co., Ltd. and Bayer A.G305
Trade mark product；
B, prepare acrylic type coating low water vapor transmittance mylar:
Dried polyester slice is added extruder melting at a temperature of 282 DEG C, extruded machine mould
Lip is extruded, slab on 16 DEG C of cold drums, and enters 4m length, 80 DEG C vertical with 12m/ minute speed
3.0 ± 0.8 times are stretched, now through the mylar of longitudinal stretching with 37.3m/ minute to stretch section
Speed enters cooling corona section, was cooled to 15～45 DEG C with 3 seconds, carries out sided corona treatment, through longitudinal direction
The mylar of stretching and sided corona treatment enters online apparatus for coating, uses the online coating of intaglio plate roller coat
It is coated by the acrylic type glue that step a is prepared by mode, two of the mylar after coating
Face coat thickness is respectively 0.20 μm, the polyester after longitudinal stretching, sided corona treatment and coating
Film enters 7m length, the preheating section of temperature 115 DEG C removes moisture, then 10m length, temperature 150 DEG C
Cross directional stretch section stretch 3.0 ± 0.8 times, more fixed at the heat-setting section of 235 DEG C through 13m length, temperature
Type 0.6 minute, make coating crosslinking curing formed densification coating, then through 70 DEG C, 0.5 minute and
The rolling after cooling in two stages under room temperature, i.e. prepares acrylic type coating low water vapor transmittance polyester
Film；
Described polyester slice is poliester chip or poly-2,6-naphthalenedicarboxylic acid second two
Alcohol ester is cut into slices；
Embodiment 38～44:
The preparation method of a kind of acrylic type coating low water vapor transmittance mylar, including following step
Rapid:
A, prepare acrylic type glue:
In the preparation container that can weigh, add the deionized water of 50 weight portions, under agitation add
Enter 10～40 weight portions water soluble propene's yogurt containing acrylic resin 40% (mass percentage content)
Liquid, after continuing stirring 30 minutes, then drips (denier) pH adjusting agent N, N-dimethylethanolamine,
Make under the pH=9.5 of water-soluble acrylic emulsion, stirring, to be sequentially added into 1.6～6.4 weight portion nano-silicons
Colloidal sol, 0.5～1 parts surfactant, 0.2～0.5 weight portion levelling agent, 0.2～0.5 weight
Amount part defoamer, adds 0.02～0.4 weight portion firming agent, adds deionized water and reach to total material
To 100 weight portions, dropping (denier) N, N-dimethylethanolamine adjusts pH to 9.5 again, then stirs
Mix 30 minutes, i.e. prepare acrylic type glue；
In embodiment 38～44, the consumption (unit of weight portion: kilogram) of each component see table:
Described Nano silica sol is nanometer grade silica emulsion, can be GRACE company of the U.S.
LUDOX TM-50 trade mark product；
Described surfactant is nonionic polyoxyethylene ether, can be LG-DOW company
TERGITOLTMTMN-6 trade mark product；
Described levelling agent is isopropanol；
Described defoamer is organic silicon polyether copolymer, can be TEGO company of Germany
Foamex 825 trade mark product；
Described firming agent is melamine formaldehyde resin and isocyanates, can be Japan three and chemistry
The NIKARAC MW-12LF trade mark product of Co., Ltd. and Bayer A.G305
Trade mark product；
B, prepare acrylic type coating low water vapor transmittance mylar:
Dried polyester slice is added extruder melting at a temperature of 265～300 DEG C, extruded machine
Mould lip is extruded, slab on 12～20 DEG C of cold drums, and with 8～15m/ minute speed enter 3～
5m length, the longitudinal stretching section of 65～95 DEG C stretch 3.0 ± 0.8 times, now through the polyester of longitudinal stretching
Thin film enters cooling corona section with the speed of 17.6～57m/ minute, with within 1～5 second, be cooled to 15～
45 DEG C, carry out sided corona treatment, enter online painting through the mylar of longitudinal stretching and sided corona treatment and arrange
Putting, it is coated with by the acrylic type glue using the online coating method of intaglio plate roller coat step a to be prepared
Cloth, two face coat thickness of the mylar after coating are respectively 0.08～0.32 μm, through vertical
Mylar after stretching, sided corona treatment and coating enters 5～9m length, temperature 100～135 DEG C
Preheating section removes moisture, and then the cross directional stretch section 8～12m length, temperature 140～160 DEG C stretches
3.0 ± 0.8 times, then through 10～16m length, temperature 225～250 DEG C heat-setting section shape 0.2～
1 minute, make coating crosslinking curing formed densification coating, then through 60～80 DEG C, 0.1～1 minute and
The at room temperature rolling after cooling in two stages, i.e. prepares acrylic type coating low water vapor transmittance polyester
Thin film；
Described polyester slice is poliester chip or poly-2,6-naphthalenedicarboxylic acid second two
Alcohol ester is cut into slices.
Embodiment 45～51:
The preparation method of a kind of acrylic type coating low water vapor transmittance mylar, makes described in step b
Acrylic type coating low water vapor transmittance mylar in, mylar thickness be 150～
250 μm, each acrylic type coating thickness are 0.08～0.32 μm；Described acrylic type glue is coated with
Layer thickness can be by adjusting applicator roll and mylar relative velocity, and between pressure roller and applicator roll
Stand-off distance is from controlling；
Concrete thickness (unit: μm) in embodiment 45～51 see table:
In the other the same as in Example 3 7～44 arbitrary, omit.
In above-described embodiment 37～51: (the mass percent Han acrylic resin 40% described in step a
Content) the pH of water-soluble acrylic emulsion be 8～10, particle diameter be 50～150nm, extension at break
Rate 300～800%；Can be self-control water-soluble acrylic emulsion or Bayer A.G XP 2427 trade mark water-soluble acrylic product emulsion.
The preparation method of described self-control water-soluble acrylic emulsion is: use prior art, with methyl-prop
Olefin(e) acid ethyl ester, n-butyl acrylate, acrylic acid, Hydroxypropyl methacrylate, styrene are raw material,
Water-soluble acrylic emulsion is prepared by emulsion polymerization；This white band of water-soluble acrylic emulsion is blue
Light and mylar adhesive force are excellent, pliability is good, water white transparency.
In above-described embodiment 31～45: in the system of acrylic type coating low water vapor transmittance mylar
In Bei, the mass percentage content of the acrylic resin in acrylic type glue prepared by step a is preferable
It is controlled at 4%～16%, coating weight can be caused during less than 4% not enough to such an extent as to can not be evenly distributed on
Film surface, during higher than 16%, coating levelling on thin film is the best, apparent property is bad, coating layer thickness
Uneven, unstable properties.
In above-described embodiment: in the percentage used, indicate the most especially, be quality (weight
Amount) percentage；In the ratio used, indicate the most especially, be weight (quality) ratio；
Described weight (quality) part can be all kilogram or ton.
In above-described embodiment: technological parameter (temperature, time, concentration, length, the speed in each step
Degree etc.) and each amounts of components numerical value etc. be scope, any point is the most applicable.
The technology contents being not specifically delineated in present invention and above-described embodiment is compared with technology, described
Raw material is commercially available prod.
The invention is not restricted to above-described embodiment, all can implement and have described in present invention described well
Effect.
Claims (4)
1. an acrylic type coating low water vapor transmittance mylar, it is characterized in that: this thin film is by polyethylene terephthalate or poly-2, biaxially oriented polyester film prepared by 6-(ethylene naphthalate) and be coated in the acrylic type gel coating composition of this film both side surface, mylar thickness is that 150～250 μm, acrylic type coating thickness are 0.08～0.32 μm；
The preparation method of described acrylic type glue is: in the preparation container that can weigh, add the deionized water of 50 weight portions, under agitation add 10～40 weight portions water-soluble acrylic emulsion containing acrylic resin 40%, after continuing stirring 30 minutes, drip pH regulator N again, N-dimethylethanolamine, make pH=9.5, 1.6～6.4 weight portion Nano silica sols it are sequentially added under stirring, 0.5～1 parts surfactant, 0.2～0.5 weight portion levelling agent, 0.2～0.5 weight portion defoamer, add 0.02～0.4 weight portion firming agent, add deionized water and reach 100 weight portions to total material, again drip N, N-dimethylethanolamine adjusts pH to 9.5, it is stirred for 30 minutes, i.e. prepare acrylic type glue；
Described Nano silica sol is nanometer grade silica emulsion；Described surfactant is nonionic polyoxyethylene ether；Described levelling agent is isopropanol；Described defoamer is organic silicon polyether copolymer；Described firming agent is melamine formaldehyde resin and isocyanates.
2. the acrylic type coating low water vapor transmittance mylar as described in claim 1, it is characterized in that: described acrylic type gel coating is after polyester slice extruded machine melting slab, longitudinal stretching film forming, online coating method is used to be coated on two surfaces of this film by acrylic type glue, then the coating obtained through cross directional stretch, drying crosslinking curing and thermal finalization.
3. a preparation method for acrylic type coating low water vapor transmittance mylar, is characterized in that comprising the following steps:
A, prepare acrylic type glue:
In the preparation container that can weigh, add the deionized water of 50 weight portions, under agitation add 10～40 weight portions water-soluble acrylic emulsion containing acrylic resin 40%, after continuing stirring 30 minutes, drip pH regulator N again, N-dimethylethanolamine, make pH=9.5, 1.6～6.4 weight portion Nano silica sols it are sequentially added under stirring, 0.5～1 parts surfactant, 0.2～0.5 weight portion levelling agent, 0.2～0.5 weight portion defoamer, add 0.02～0.4 weight portion firming agent, add deionized water and reach 100 weight portions to total material, again drip N, N-dimethylethanolamine adjusts pH to 9.5, it is stirred for 30 minutes, i.e. prepare acrylic type glue；
Described Nano silica sol is nanometer grade silica emulsion；
Described surfactant is nonionic polyoxyethylene ether；
Described levelling agent is isopropanol；
Described defoamer is organic silicon polyether copolymer；
Described firming agent is melamine formaldehyde resin and isocyanates；
B, prepare acrylic type coating low water vapor transmittance mylar:
nullDried polyester slice is added extruder melting at a temperature of 265～300 DEG C，Extruded machine mould lip is extruded，Slab on 12～20 DEG C of cold drums，And enter 3～5m length with 8～15m/ minute speed、The longitudinal stretching section of 65～95 DEG C stretches 3.0 ± 0.8 times，Now the mylar through longitudinal stretching enters cooling corona section with the speed of 17.6～57m/ minute，It is cooled to 15～45 DEG C with 1～5 second，Carry out sided corona treatment，The mylar online apparatus for coating of entrance through longitudinal stretching and sided corona treatment，It is coated by the acrylic type glue using online coating method step a of intaglio plate roller coat to prepare，Two face coat thickness of the mylar after coating are respectively 0.08～0.32 μm，Through longitudinal stretching、Mylar after sided corona treatment and coating enters 5～9m length、Temperature 100～the preheating section removing moisture of 135 DEG C，Then in 8～12m length、Temperature 140～the cross directional stretch section stretching 3.0 ± 0.8 times of 160 DEG C，Again through 10～16m length、Temperature is shaped 0.2～1 minute at the heat-setting section of 225～250 DEG C，Coating crosslinking curing is made to form the coating of densification，Again through 60～80 DEG C、0.1～1 minute and the rolling after cooling at room temperature two stages，I.e. prepare acrylic type coating low water vapor transmittance mylar；
Described polyester slice is poliester chip or the section of poly-2,6-(ethylene naphthalate).
4. the preparation method of acrylic type coating low water vapor transmittance mylar as described in claim 3, it is characterized in that: in the acrylic type coating low water vapor transmittance mylar prepared described in step b, mylar thickness is that 150～250 μm, each acrylic type coating thickness are 0.08～0.32 μm.
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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 |
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| US20080050583A1 (en) * | 2004-11-25 | 2008-02-28 | Teijin Dupont Films Japan Limited | Easily Adhesive Polyester Film and Film for Protecting Back Side of Solar Cell Using the Same |
| CN102325831A (en) * | 2009-02-20 | 2012-01-18 | 三菱树脂株式会社 | White coated polyester film, process for production thereof and use thereof as backside cover in solar modules |
| CN202163072U (en) * | 2010-12-31 | 2012-03-14 | 苏州中来光伏新材股份有限公司 | Weatherable solar cell back film with high steric hindrance |
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| US20080050583A1 (en) * | 2004-11-25 | 2008-02-28 | Teijin Dupont Films Japan Limited | Easily Adhesive Polyester Film and Film for Protecting Back Side of Solar Cell Using the Same |
| CN102325831A (en) * | 2009-02-20 | 2012-01-18 | 三菱树脂株式会社 | White coated polyester film, process for production thereof and use thereof as backside cover in solar modules |
| CN202163072U (en) * | 2010-12-31 | 2012-03-14 | 苏州中来光伏新材股份有限公司 | Weatherable solar cell back film with high steric hindrance |
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