CN103013369B - High-cohesiveness polyester film, method for preparing same as well as solar cell back panel - Google Patents
High-cohesiveness polyester film, method for preparing same as well as solar cell back panel Download PDFInfo
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- CN103013369B CN103013369B CN201210455277.4A CN201210455277A CN103013369B CN 103013369 B CN103013369 B CN 103013369B CN 201210455277 A CN201210455277 A CN 201210455277A CN 103013369 B CN103013369 B CN 103013369B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to the technical field of polyester films, and in particular relates to a high-cohesiveness polyester film, a method for preparing the same and a solar cell back panel. In order to solve the defect of layering or falling off of the conventional solar back film, the invention provides the high-cohesiveness polyester film, the method for preparing the same and the solar cell back panel. The polyester film comprises a base layer, wherein the two sides of the base layer are respectively adhered with a high cohesive layer, and a high cohesive layer material is a copolymer of maleic anhydride and hydroxyethyl methacrylate. The high-cohesiveness polyester film provided by the invention has good cohesiveness, and the method for preparing the same is simple in technology and is easy to operate. The solar cell back panel which is prepared from the polyester film cannot layer or fall off.
Description
Technical field
The present invention relates to polyester film technical field, be specifically related to a kind of high-adhesion polyester film, its preparation method and solar cell backboard.
Background technology
Sun power backboard (also can be described as solar energy back film, solar battery back film) plays waterproof, insulation, ageing-resistant and support cells sheet effect in solar energy glass lamination cell panel.Traditional solar battery back film is the composite membrane of TPT or KPK three-decker in the market, wherein " T " representative is the Tedlar type polyvinyl fluoride thin film (PVF) that du pont company produces, that " P " represents is polyethylene terephthalate film (PET), and that " K " represents is PVDF membrane (PVDF).Because fluorine film has the advantages such as remarkable chemical resistant properties, ageing-resistant, corrosion-resistant, high barrier, therefore all kinds of fluorine films of the numerous and confused exploitation of each company, as THV(tetrafluoroethylene-hexafluoroethylene-vinylidene), ECTFE(ethene chlorotrifluoroethylene), ETFE(ethylene tetrafluoroethylene copolymer) etc., be applied in successively in solar battery back film.But generally fluorine film exists the surface can be lower, be difficult to the shortcoming of bonding, there is the phenomenon of layering or disengaging in the TPT of preparation or KPK, and this has seriously hindered the development of solar energy back film.
Summary of the invention
In order to solve the layering existing in existing solar energy back film or the defect coming off, the invention provides a kind of high-adhesion polyester film, its preparation method and solar cell backboard.High-adhesion polyester film cohesiveness provided by the invention is better, and its preparation method technique is simple, easy handling.The sun power backboard of being prepared by this polyester film can layering or is come off.
In order to solve the problems of the technologies described above, the present invention adopts following technical proposals:
The invention provides a kind of high-adhesion polyester film, described polyester film comprises basic unit's (claim again base material, or basement membrane), and the two-side adhesive of described basic unit has high tack coat, and described high bonding layer material is the multipolymer of maleic anhydride and hydroxyethyl methylacrylate.
The base material of described polyester film is polyethylene terephthalate, polybutylene terephthalate or Polyethylene Naphthalate.The surface tension of base material is greater than 40dyn/cm.
Further, described maleic anhydride and hydroxyethyl methylacrylate copolymer grafted are in substrate surface.Wherein, two keys of maleic anhydride and hydroxyethyl methylacrylate are at a large amount of free radicals of microwave induced lower appearance, the appearance of free radicals and the polyester ester bond of polyester film substrate surface also ruptures under microwave condition, these free radicals carry out Random Links, form the side group of a large amount of maleic anhydrides and hydroxyethyl methylacrylate multipolymer in the polyester long-chain of polyester film surface.The formation of these side groups makes the surface of film have higher polarity, thereby has higher cohesiveness.
Described maleic anhydride is connected by chemical bond with substrate surface with hydroxyethyl methylacrylate multipolymer, also has Van der Waals force between multipolymer and substrate surface.
Further, described basic unit is added with inorganic particulate, and the addition of described inorganic particulate is that percentage ratio is weight percentage described in 0.5-20%().Preferably, the addition of described inorganic particulate is 1-10%, 12-18%, 5-13% or 8-16%.
The thickness of described basic unit is 150-350 μ m.
Described inorganic particulate comprises the combination of a kind of in silicon-dioxide, titanium dioxide, zinc oxide, aluminum oxide or zinc sulfide white or at least two kinds.Preferably, described inorganic particulate is titanium dioxide; The particle diameter of described inorganic particulate is 0.2-3.5 μ m.
Described basic unit can be that individual layer is extruded structure, can be also the three-layer co-extruded structure of ABA.
Further, in described A layer, be added with inorganic particulate, addition is 0.5-40%, and in described B layer, the addition of inorganic particulate is 0-20%.
Further, described basic unit is the three-layer co-extruded structure of ABA, and in described A layer, the addition of inorganic particulate is 0.5-40%, and in described B layer, the addition of inorganic particulate is 0.5-20%.
Preferably, in described A layer, the addition of inorganic particulate is greater than the addition of inorganic particulate in B layer.
Preferably, in described A layer, the addition of inorganic particulate is 2.4-40%, 3-10%, 18-25%, 15-30% or 20-35%.Preferably, in described B layer, the addition of inorganic particulate is 1-10%, 12-18%, 5-13% or 8-16%.
The thickness of described A layer is 5-30 μ m, and the thickness of described B layer is 90-340 μ m.
Further, the thickness of described basic unit is 180-300 μ m, and the thickness of described A layer is 10-25 μ m, and the thickness of described B layer is 130-280 μ m.Aforementioned polyester film thinner thickness, simple in structure, cohesiveness is better.
The present invention also provides a kind of preparation method of above-mentioned high-adhesion polyester film, and described preparation method comprises the steps:
(1) polyester slice and modified master batch are put in crystallizing and drying tower dryly, entered forcing machine after dry and melt extrude, cooling slab, longitudinal stretching;
(2) be coated with online the ethyl acetate solution (be called for short solution or coating fluid) of maleic anhydride and hydroxyethyl methylacrylate, by solution coat, on two surfaces up and down of step (1) gained base material, coating thickness is 0.1-5 μ m;
(3) step (2) gained base material is carried out to cross directional stretch, heat setting type processing, after microwave modification grafting is processed, rolling, cuts, and obtains described high-adhesion polyester film.
Described modified master batch (claiming again modified poly ester master batch) comprises that particle diameter is inorganic particulate and the film grade polyester chip of 0.2-3.5 μ m.In described modified master batch, the weight percentage of inorganic particulate is 45-58%, and the weight percentage of film grade polyester chip is 42-55%.
Further, described crystallizing and drying temperature is 140-180 DEG C; Melt temperature is 260-300 DEG C, or 260-280 DEG C; Longitudinal stretching temperature is 70-100 DEG C, or 80-100 DEG C, and stretch ratio is 2.8-3.2; Cross directional stretch temperature is 100-130 DEG C, and stretch ratio is 2.8-3.2; Heat setting temperature is 170-210 DEG C or 190-220 DEG C; Microwave power is 1-50kW.Conventionally, the total length of microwave oven is 15-50m.
In the time that microwave modification grafting is processed, microwave power is larger, and the treatment time is shorter; Microwave power is less, and the treatment time is longer.Microwave power is 1-20kW, and the grafting treatment time is 1-2min.Microwave power is 30-50kW, and the grafting treatment time is 0.5-1min.When microwave power is less, the treatment time, when longer, gained polyester film adhesive property was better.
Further, in the solution of described step (2), the weight ratio of maleic anhydride and hydroxyethyl methylacrylate is 1:0.4-2.4, and the content of maleic anhydride and hydroxyethyl methylacrylate is that percentage ratio is weight percentage described in 20-50%().
Preferably, the weight ratio of described maleic anhydride and hydroxyethyl methylacrylate is 1:1,1:0.5,1:2,1:2.2,2:3,3:7,3:2 or 7:3.
Further, in described coating fluid, the weight percentage of maleic anhydride and hydroxyethyl methylacrylate is 20%, 25%, 30%, 35%, or 40%.
Preferably, the coating thickness of described coating fluid is 2um, 3.5um, 1-3 μ m or 2-4 μ m.
Further, in described step (3), the microwave modification grafting treatment time is 1-2 minute.
Further, the weight ratio of the polyester slice in described step (1) and modified master batch is 100:1-220.
Further, the weight ratio of described polyester slice and modified master batch is 100:5-50,100:20-200,100:10-100 or 100:50-150.
The present invention also provides a kind of solar cell backboard, and described backboard comprises above-mentioned high-adhesion polyester film.Or described backboard comprises the high-adhesion polyester film of being prepared by aforesaid method.
Compared with prior art, the present invention adopts microwave treatment technology, increases the polarity of surface of polyester, gives the adhesive property of material excellence, can effectively improve the adhesive property of polyester film and fluorine material.And high-adhesion polyester film provided by the invention has good sticking power, the composite solar battery backboard such as TPT, TPE, KPK, KPE that adopts polyester film provided by the invention to make, or the solar cell backboard film made from polyester film single or double coating fluoro-containing coating provided by the invention, can be under-60 DEG C of-100 DEG C of environment life-time service, effectively avoid backboard membrane life-time service and obscission of producing under high and low temperature environment.Preparation method's technique of high-adhesion polyester film provided by the invention is simple, easy handling.
Brief description of the drawings
Fig. 1 is the structural representation of a kind of high-adhesion polyester film provided by the invention;
Fig. 2 is the structural representation of another kind of high-adhesion polyester film provided by the invention.
Wherein, 1 is basic unit, and 2 is high tack coat.
Embodiment
As shown in Figure 1, high-adhesion polyester film provided by the invention comprises basic unit 1, and the both sides of described basic unit 1 are provided with high tack coat 2, and the thickness of described basic unit 1 is 150-350 μ m.
As shown in Figure 2, high-adhesion polyester film provided by the invention comprises basic unit 1, and the both sides of described basic unit 1 are provided with high tack coat 2, and the thickness of described basic unit 1 is 150-350 μ m; Described basic unit 1 is the three-layer co-extruded structure of ABA, and the thickness of described A layer is 5-30 μ m, and the thickness of described B layer is 90-340 μ m.
The present invention's material and facility used is current material and equipment, for example: polyester slice used and inorganic particulate are product common on market, maleic anhydride, hydroxyethyl methylacrylate and ethyl acetate are also buied on market.
The preparation method of high-adhesion polyester film provided by the invention comprises the steps:
(1) polyester slice and modified master batch are put in crystallizing and drying tower dryly, entered forcing machine after dry and melt extrude, cooling slab, longitudinal stretching;
(2) be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, by solution coat, on two surfaces up and down of step (1) gained base material, coating thickness is 0.1-5 μ m;
(3) step (2) gained base material is carried out to cross directional stretch, heat setting type processing, after microwave modification grafting is processed, rolling, cuts, and obtains described high-adhesion polyester film.
Prepare according to the method described above high-adhesion polyester film, test its close-burning method as follows:
Forming thickness in polyester film surface is the formation of pressure-sensitive adhesive layer (PSA) of 20 μ m, tackiness agent aspect is attached on float glass, in 23 DEG C, the atmosphere of 65%RH, places 1 day, peel off with 90 ° of peel angles, observe PSA at Restzustand on glass, evaluate by grade standard described in table 1.
Above-mentioned PSA uses and contains amino acrylate copolymer, and preferred, this PSA is that the n-butyl acrylate of 86 % by mole and the methyl acrylate of 14 % by mole form by acrylic component.
Table 1 adhesive property grade standard
| Grade | Standard | Cohesive force |
| 5 | PSA revolution mark is less than 10% | Fabulous |
| 4 | PSA revolution mark be 10% or more than, be less than 20% | Well |
| 3 | PSA revolution mark be 20% or more than, be less than 30% | Better |
| 2 | PSA revolution mark be 30% or more than, be less than 40% | Bad |
| 1 | PSA revolution mark exceedes 40% | Very bad |
Described in following embodiment, percentage ratio is weight percentage, and the thickness of the basic unit of gained polyester film is 150-350 μ m; Described polyester slice is polyethylene terephthalate section, polybutylene terephthalate section or Polyethylene Naphthalate section.
Embodiment 1:
The ethyl acetate solution of configuration maleic anhydride and hydroxyethyl methylacrylate; The weight ratio of described maleic anhydride and hydroxyethyl methylacrylate is 3:7, and in described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 50%; Adopt dual-screw pelletizer to prepare modified poly ester master batch, gained modified master batch contains Rutile type Titanium Dioxide that 50% particle diameter is 0.3 μ m, silicon-dioxide that 5% particle diameter is 2 μ m and 45% film grade polyester chip.
Prepare according to the method described above high-adhesion polyester film, the modified master batch of the polyester slice of 100 weight parts and 5 weight parts is put into dry 4-5h in the crystallizing and drying tower of 160 DEG C, when the water ratio of polyester slice and modified master batch is during lower than 50ppm, enter forcing machine melt extrudes at 260-280 DEG C, through 150 order strainer coarse filtrations, 400 order strainer essences are filtered, and head is extruded; By the 15-20 DEG C of cooling slab of cold drum, 3.0 times of longitudinal stretchings at 70-90 DEG C; Be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, solution be uniformly coated on to two surfaces up and down of polyester film (basic unit), coat-thickness is 2 μ m.3.0 times of cross directional stretchs at 100-130 DEG C, carry out heat setting type processing at 170-210 DEG C, carry out modify and graft and process after 1 minute under the microwave power of 20kW, and rolling, cuts, and obtains described high-adhesion polyester film A1.
Embodiment 2:
The ethyl acetate solution of configuration maleic anhydride and hydroxyethyl methylacrylate; The weight ratio of described maleic anhydride and hydroxyethyl methylacrylate is 2:3, and in described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 30%; Prepare modified master batch, gained modified master batch contains the zinc oxide that 50% particle diameter is 0.5 μ m, silicon-dioxide and the 42% film grade polyester chip that 8% particle diameter is 1.5 μ m.
Prepare according to the method described above high-adhesion polyester film, the modified master batch of the polyester slice of 100 weight parts and 10 weight parts is put into dry 4-5h in the crystallizing and drying tower of 160 DEG C, when the water ratio of polyester slice and modified master batch is during lower than 50ppm, enter forcing machine, at 260-280 DEG C, melt extrude, through 150 order strainer coarse filtrations, 400 order strainer essences are filtered, head is extruded, by the 15-20 DEG C of cooling slab of cold drum, 3.0 times of longitudinal stretchings at 70-90 DEG C, the ethyl acetate solution of online coating maleic anhydride and hydroxyethyl methylacrylate, solution is uniformly coated on to two surfaces up and down of polyester film (basic unit), coat-thickness is 2.5 μ m.3.0 times of cross directional stretchs at 100-130 DEG C, carry out heat setting type processing at 170-210 DEG C, carry out modify and graft and process after 1 minute under the microwave power of 30kW, and rolling, cuts, and obtains described high-adhesion polyester film A2.
Embodiment 3:
The ethyl acetate solution of configuration maleic anhydride and hydroxyethyl methylacrylate; The weight ratio of described maleic anhydride and hydroxyethyl methylacrylate is 1:1, and in described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 40%; Prepare modified master batch, gained modified master batch contains the aluminum oxide that 50% particle diameter is 0.5 μ m, silicon-dioxide and the 47% film grade polyester chip that 3% particle diameter is 2.0 μ m.
Prepare according to the method described above high-adhesion polyester film, the modified master batch of the polyester slice of 100 weight parts and 20 weight parts is put into dry 4-5h in the crystallizing and drying tower of 160 DEG C, when the water ratio of polyester slice and modified master batch is during lower than 50ppm, enter forcing machine melt extrudes at 260-280 DEG C, through 150 order strainer coarse filtrations, 400 order strainer essences are filtered, and head is extruded; By the 15-20 DEG C of cooling slab of cold drum, 3.0 times of longitudinal stretchings at 70-90 DEG C, be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, solution be uniformly coated on to two surfaces up and down of polyester film (basic unit), coat-thickness is 3.0 μ m.3.0 times of cross directional stretchs at 100-130 DEG C, carry out heat setting type processing at 170-210 DEG C, carry out modify and graft and process after 1.5 minutes under the microwave power of 20kW, and rolling, cuts, and obtains described high-adhesion polyester film A3.
Embodiment 4:
The ethyl acetate solution of configuration maleic anhydride and hydroxyethyl methylacrylate; The weight ratio of described maleic anhydride and hydroxyethyl methylacrylate is 3:2, and in described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 30%; Prepare modified master batch, gained modified master batch contains the zinc sulfide white that 50% particle diameter is 0.5 μ m, silicon-dioxide and the 45% film grade polyester chip that 5% particle diameter is 1.8 μ m.
Prepare according to the method described above high-adhesion polyester film, the polyester slice of 100 weight parts and 40 weight part modified master batchs are put into dry 4-5h in the crystallizing and drying tower of 160 DEG C, when the water ratio of polyester slice and modified master batch is during lower than 50ppm, enter forcing machine melt extrudes at 260-280 DEG C, through 150 order strainer coarse filtrations, 400 order strainer essences are filtered, and head is extruded; By the 15-20 DEG C of cooling slab of cold drum, 3.0 times of longitudinal stretchings at 70-90 DEG C, be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, solution be uniformly coated on to two surfaces up and down of polyester film (basic unit), coat-thickness is 3.5 μ m.3.0 times of cross directional stretchs at 100-130 DEG C, carry out heat setting type processing at 170-210 DEG C, carry out modify and graft and process after 0.8 minute under the microwave power of 40kW, and rolling, cuts, and obtains described high-adhesion polyester film A4.
Embodiment 5:
The ethyl acetate solution of configuration maleic anhydride and hydroxyethyl methylacrylate; The weight ratio of described maleic anhydride and hydroxyethyl methylacrylate is 7:3, and in described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 20%; Prepare modified master batch, gained modified master batch contains the anatase thpe white powder that 50% particle diameter is 0.3 μ m, silicon-dioxide and the 42% film grade polyester chip that 8% particle diameter is 1.5 μ m.
Prepare according to the method described above high-adhesion polyester film, the modified master batch of the polyester slice of 100 weight parts and 50 weight parts is put into dry 4-5h in the crystallizing and drying tower of 160 DEG C, when the water ratio of polyester slice and modified master batch is during lower than 50ppm, enter forcing machine melt extrudes at 260-280 DEG C, through 150 order strainer coarse filtrations, 400 order strainer essences are filtered, head is extruded, by the 15-20 DEG C of cooling slab of cold drum, 3.0 times of longitudinal stretchings at 70-90 DEG C, the ethyl acetate solution of online coating maleic anhydride and hydroxyethyl methylacrylate, solution is uniformly coated on to two surfaces up and down of polyester film (basic unit), coat-thickness is 2.0 μ m.3.0 times of cross directional stretchs at 100-130 DEG C, carry out heat setting type processing at 170-210 DEG C, carry out modify and graft and process after 0.6 minute under the microwave power of 50kW, and rolling, cuts, and obtains described high-adhesion polyester film A5.
The adhesive property test chart of polyester film A1-A5 prepared by table 2 embodiment 1-5
Embodiment 6:
The ethyl acetate solution of configuration maleic anhydride and hydroxyethyl methylacrylate; The weight ratio of described maleic anhydride and hydroxyethyl methylacrylate is 1:2, and in described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 25%.
Prepare according to the method described above high-adhesion polyester film, polyester slice and modified master batch are put into respectively in the crystallizing and drying tower of 160 DEG C to all dry 4-5h.When the water ratio of polyester slice and modified master batch is during lower than 50ppm, enter respectively twin screw extruder and single screw extrusion machine according to proportioning, at 260-280 DEG C, melt extrude, wherein enter polyester slice that the material of twin screw extruder comprises 100 weight parts and the modified master batch (A layer) of 15 weight parts, enter polyester slice that the material of single screw extrusion machine comprises 100 weight parts and the modified master batch (B layer) of 5 weight parts.A layer melt filters through 400 order strainers, and B layer melt is through 150 order strainer coarse filtrations, and 400 order strainer essences are filtered, and extrude by T-shaped die head, obtain the three-layer co-extruded structure melt of ABA; By the 15-20 DEG C of cooling slab of cold drum, 3.2 times of longitudinal stretchings at 70-90 DEG C, be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, solution be uniformly coated on to two surfaces up and down of polyester film (basic unit), coat-thickness is 0.1-2 μ m.3.2 times of cross directional stretchs at 100-130 DEG C, at 170-210 DEG C, carry out heat setting type processing, under the microwave power of 1kW, carry out modify and graft and process after 2 minutes, rolling, cuts, obtaining thickness is the high-adhesion polyester film A6 of 150 μ m, wherein, in described A layer, the addition of inorganic particulate is 6.5%, and thickness is 30 μ m, in described B layer, the addition of inorganic particulate is 2.4%, and thickness is 90 μ m.
Embodiment 7:
The ethyl acetate solution of configuration maleic anhydride and hydroxyethyl methylacrylate; The weight ratio of described maleic anhydride and hydroxyethyl methylacrylate is 2:1, and in described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 35%.
Prepare according to the method described above high-adhesion polyester film, polyester slice and modified master batch are put into respectively in the crystallizing and drying tower of 160 DEG C to all dry 4-5h.When the water ratio of polyester slice and modified master batch is during lower than 50ppm, enter respectively twin screw extruder and single screw extrusion machine according to proportioning, at 260-280 DEG C, melt extrude, wherein enter polyester slice that the material of twin screw extruder comprises 100 weight parts and the modified master batch (A layer) of 50 weight parts, enter polyester slice that the material of single screw extrusion machine comprises 100 weight parts and the modified master batch (B layer) of 30 weight parts.A layer melt filters through 400 order strainers, and B layer melt is through 150 order strainer coarse filtrations, and 400 order strainer essences are filtered, and extrude by T-shaped die head, obtain ABA structure melt; By the 15-20 DEG C of cooling slab of cold drum, 2.8 times of longitudinal stretchings at 70-90 DEG C, be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, solution be uniformly coated on to two surfaces up and down of polyester film (basic unit), coat-thickness is 2.5 μ m.2.8 times of cross directional stretchs at 100-130 DEG C, at 170-210 DEG C, carry out heat setting type processing, under the microwave power of 10kW, carry out modify and graft and process after 1.5 minutes, rolling, cuts, obtaining thickness is the high-adhesion polyester film A7 of 350 μ m, wherein, in described A layer, the addition of inorganic particulate is 17%, and thickness is 5 μ m, in described B layer, the addition of inorganic particulate is 12%, and thickness is 340 μ m.
Embodiment 8:
The ethyl acetate solution of configuration maleic anhydride and hydroxyethyl methylacrylate; The weight ratio of described maleic anhydride and hydroxyethyl methylacrylate is 1:0.4, and in described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 45%; Prepare modified master batch, gained modified master batch contains the zinc sulfide white that 50% particle diameter is 0.5 μ m, silicon-dioxide and the 45% film grade polyester chip that 5% particle diameter is 2.0 μ m.
Prepare according to the method described above high-adhesion polyester film, polyester slice and modified master batch are put into respectively in the crystallizing and drying tower of 160 DEG C to all dry 4-5h.When the water ratio of polyester slice and modified master batch is during lower than 50ppm, enter respectively twin screw extruder and single screw extrusion machine according to proportioning, at 260-280 DEG C, melt extrude, wherein enter polyester slice that the material of twin screw extruder comprises 100 weight parts and the modified master batch (A layer) of 30 weight parts, enter polyester slice that the material of single screw extrusion machine comprises 100 weight parts and the modified master batch (B layer) of 18 weight parts.A layer melt filters through 400 order strainers, and B layer melt is through 150 order strainer coarse filtrations, and 400 order strainer essences are filtered, and extrude by T-shaped die head, obtain ABA structure melt; By the 15-20 DEG C of cooling slab of cold drum, 3.0 times of longitudinal stretchings at 70-90 DEG C, be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, solution be uniformly coated on to two surfaces up and down of polyester film (basic unit), coat-thickness is 3.0 μ m.3.0 times of cross directional stretchs at 100-130 DEG C, carry out heat setting type processing at 170-210 DEG C, carry out modify and graft and process after 1.2 minutes under the microwave power of 25kW, and rolling, cuts, and obtains described high-adhesion polyester film A8.
Embodiment 9:
The ethyl acetate solution of configuration maleic anhydride and hydroxyethyl methylacrylate; The weight ratio of described maleic anhydride and hydroxyethyl methylacrylate is 1:2.4, and in described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 30%.
Prepare according to the method described above high-adhesion polyester film, polyester slice and modified master batch are put into respectively in the crystallizing and drying tower of 160 DEG C to all dry 4-5h.When the water ratio of polyester slice and modified master batch is during lower than 50ppm, enter respectively twin screw extruder and single screw extrusion machine according to proportioning, at 260-280 DEG C, melt extrude, wherein enter polyester slice that the material of twin screw extruder comprises 100 weight parts and the modified master batch (A layer) of 40 weight parts, enter polyester slice that the material of single screw extrusion machine comprises 100 weight parts and the modified master batch (B layer) of 20 weight parts.A layer melt filters through 400 order strainers, and B layer melt is through 150 order strainer coarse filtrations, and 400 order strainer essences are filtered, and extrude by T-shaped die head, obtain ABA structure melt; By the 15-20 DEG C of cooling slab of cold drum, 3.0 times of longitudinal stretchings at 70-90 DEG C, be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, solution be uniformly coated on to two surfaces up and down of polyester film (basic unit), coat-thickness is 3.5um-5 μ m.3.0 times of cross directional stretchs at 100-130 DEG C, at 170-210 DEG C, carry out heat setting type processing, under the microwave power of 30kW, carry out modify and graft and process after 1 minute, rolling, cuts, obtaining thickness is the high-adhesion polyester film A9 of 180 μ m, wherein, in described A layer, the addition of inorganic particulate is 15%, and thickness is 25 μ m, in described B layer, the addition of inorganic particulate is 9%, and thickness is 130 μ m.
Embodiment 10:
The ethyl acetate solution of configuration maleic anhydride and hydroxyethyl methylacrylate; The weight ratio of described maleic anhydride and hydroxyethyl methylacrylate is 2:3, and in described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 50%.
Prepare according to the method described above high-adhesion polyester film, polyester slice and modified master batch are put into respectively in the crystallizing and drying tower of 160 DEG C to all dry 4-5h.When the water ratio of polyester slice and modified master batch is during lower than 50ppm, enter respectively twin screw extruder and single screw extrusion machine according to proportioning, at 260-280 DEG C, melt extrude, wherein enter polyester slice that the material of twin screw extruder comprises 100 weight parts and the modified master batch (A layer) of 50 weight parts, enter polyester slice that the material of single screw extrusion machine comprises 100 weight parts and the modified master batch (B layer) of 30 weight parts.A layer melt filters through 400 order strainers, and B layer melt is through 150 order strainer coarse filtrations, and 400 order strainer essences are filtered, and extrude by T-shaped die head, obtain ABA structure melt; By the 15-20 DEG C of cooling slab of cold drum, 3.0 times of longitudinal stretchings at 70-90 DEG C, be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, solution be uniformly coated on to two surfaces up and down of polyester film (basic unit), coat-thickness is 4.0 μ m.3.0 times of cross directional stretchs at 100-130 DEG C, at 170-210 DEG C, carry out heat setting type processing, under the microwave power of 50kW, carry out modify and graft and process after 0.5 minute, rolling, cuts, obtaining thickness is the high-adhesion polyester film A10 of 300 μ m, wherein, in described A layer, the addition of inorganic particulate is 18%, and thickness is 10 μ m, in described B layer, the addition of inorganic particulate is 12%, and thickness is 280 μ m.
The adhesive property test chart of the polyester film A6-A10 that table 3 embodiment 6-10 makes
Embodiment 11:
The ethyl acetate solution of configuration maleic anhydride and hydroxyethyl methylacrylate; The weight ratio of described maleic anhydride and hydroxyethyl methylacrylate is 1:2, and in described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 25%; Prepare modified master batch, gained modified master batch contains the titanium dioxide that 45% particle diameter is 1.0 μ m, silicon-dioxide and the 49% film grade polyester chip that 6% particle diameter is 2.0 μ m.
Prepare according to the method described above high-adhesion polyester film, polyester slice and modified master batch are put into respectively in the crystallizing and drying tower of 160 DEG C to all dry 4-5h.When the water ratio of polyester slice and modified master batch is during lower than 50ppm, enter respectively twin screw extruder and single screw extrusion machine according to proportioning, at 260-280 DEG C, melt extrude, wherein enter polyester slice that the material of twin screw extruder comprises 100 weight parts and the modified master batch (A layer) of 5 weight parts, the material that enters single screw extrusion machine is polyester slice (B layer).A layer melt filters through 400 order strainers, and B layer melt is through 150 order strainer coarse filtrations, and 400 order strainer essences are filtered, and extrude by T-shaped die head, obtain ABA structure melt; By the 15-20 DEG C of cooling slab of cold drum, 3.2 times of longitudinal stretchings at 80-100 DEG C, be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, solution be uniformly coated on to two surfaces up and down of polyester film (basic unit), coat-thickness is 1 μ m.3.2 times of cross directional stretchs at 100-130 DEG C, at 190-200 DEG C, carry out heat setting type processing, under the microwave power of 1kW, carry out modify and graft and process after 2 minutes, rolling, cuts, obtaining thickness is the high-adhesion polyester film A11 of 190 μ m, wherein, in described A layer, the addition of inorganic particulate is 2.4%, and thickness is 20 μ m, in described B layer, the addition of inorganic particulate is 0, and thickness is 150 μ m.
Embodiment 12:
The ethyl acetate solution of configuration maleic anhydride and hydroxyethyl methylacrylate; The weight ratio of described maleic anhydride and hydroxyethyl methylacrylate is 2:1, and in described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 35%; Prepare modified master batch, gained modified master batch contains the aluminum oxide that 46% particle diameter is 0.2 μ m, titanium dioxide and the 49% film grade polyester chip that 5% particle diameter is 1.0 μ m.
Prepare according to the method described above high-adhesion polyester film, polyester slice and modified master batch are put into respectively in the crystallizing and drying tower of 160 DEG C to all dry 4-5h.When the water ratio of polyester slice and modified master batch is during lower than 50ppm, enter respectively twin screw extruder and single screw extrusion machine according to proportioning, at 260-280 DEG C, melt extrude, wherein enter polyester slice that the material of twin screw extruder comprises 100 weight parts and the modified master batch (A layer) of 70 weight parts, enter polyester slice that the material of single screw extrusion machine comprises 100 weight parts and the modified master batch (B layer) of 1 weight part.A layer melt filters through 400 order strainers, and B layer melt is through 150 order strainer coarse filtrations, and 400 order strainer essences are filtered, and extrude by T-shaped die head, obtain ABA structure melt; By the 15-20 DEG C of cooling slab of cold drum, 2.8 times of longitudinal stretchings at 70-90 DEG C, be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, solution be uniformly coated on to two surfaces up and down of polyester film (basic unit), coat-thickness is 2.5 μ m.2.8 times of cross directional stretchs at 100-130 DEG C, at 180-210 DEG C, carry out heat setting type processing, under the microwave power of 10kW, carry out modify and graft and process after 1.5 minutes, rolling, cuts, obtaining thickness is the high-adhesion polyester film A12 of 220 μ m, wherein, in described A layer, the addition of inorganic particulate is 21%, and thickness is 10 μ m, in described B layer, the addition of inorganic particulate is 0.5%, and thickness is 200 μ m.
Embodiment 13:
The ethyl acetate solution of configuration maleic anhydride and hydroxyethyl methylacrylate; The weight ratio of described maleic anhydride and hydroxyethyl methylacrylate is 1:0.8, and in described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 45%; Prepare modified master batch, gained modified master batch contains the zinc sulfide white that 42% particle diameter is 0.5 μ m, titanium dioxide and the 50% film grade polyester chip that 8% particle diameter is 2.0 μ m.
Prepare according to the method described above high-adhesion polyester film, polyester slice and modified master batch are put into respectively in the crystallizing and drying tower of 160 DEG C to all dry 4-5h.When the water ratio of polyester slice and modified master batch is during lower than 50ppm, enter respectively twin screw extruder and single screw extrusion machine according to proportioning, at 260-300 DEG C, melt extrude, wherein enter polyester slice that the material of twin screw extruder comprises 100 weight parts and the modified master batch (A layer) of 120 weight parts, enter polyester slice that the material of single screw extrusion machine comprises 100 weight parts and the modified master batch (B layer) of 68 weight parts.A layer melt filters through 400 order strainers, and B layer melt is through 150 order strainer coarse filtrations, and 400 order strainer essences are filtered, and extrude by T-shaped die head, obtain ABA structure melt; By the 15-20 DEG C of cooling slab of cold drum, 3.0 times of longitudinal stretchings at 70-90 DEG C, be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, solution be uniformly coated on to two surfaces up and down of polyester film (basic unit), coat-thickness is 3.0 μ m.3.0 times of cross directional stretchs at 100-130 DEG C, at 170-210 DEG C, carry out heat setting type processing, under the microwave power of 25kW, carry out modify and graft and process after 1.2 minutes, rolling, cuts, obtaining thickness is the high-adhesion polyester film A13 of 170 μ m, wherein, in described A layer, the addition of inorganic particulate is 27%, and thickness is 8 μ m, in described B layer, the addition of inorganic particulate is 20%, and thickness is 154 μ m.
Embodiment 14:
The ethyl acetate solution of configuration maleic anhydride and hydroxyethyl methylacrylate; The weight ratio of described maleic anhydride and hydroxyethyl methylacrylate is 1:2.4, and in described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 30%; Prepare modified master batch, gained modified master batch contains the zinc sulfide white that 48% particle diameter is 0.5 μ m, silicon-dioxide and the 45% film grade polyester chip that 7% particle diameter is 3.5 μ m.
Prepare according to the method described above high-adhesion polyester film, polyester slice and modified master batch are put into respectively in the crystallizing and drying tower of 160 DEG C to all dry 4-5h.When the water ratio of polyester slice and modified master batch is during lower than 50ppm, enter respectively twin screw extruder and single screw extrusion machine according to proportioning, at 260-280 DEG C, melt extrude, wherein enter polyester slice that the material of twin screw extruder comprises 100 weight parts and the modified master batch (A layer) of 150 weight parts, enter polyester slice that the material of single screw extrusion machine comprises 100 weight parts and the modified master batch (B layer) of 50 weight parts.A layer melt filters through 400 order strainers, and B layer melt is through 150 order strainer coarse filtrations, and 400 order strainer essences are filtered, and extrude by T-shaped die head, obtain ABA structure melt; By the 15-20 DEG C of cooling slab of cold drum, 3.0 times of longitudinal stretchings at 70-90 DEG C, be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, solution be uniformly coated on to two surfaces up and down of polyester film (basic unit), coat-thickness is 3.5um-5 μ m.3.0 times of cross directional stretchs at 100-130 DEG C, at 170-210 DEG C, carry out heat setting type processing, under the microwave power of 30kW, carry out modify and graft and process after 1 minute, rolling, cuts, obtaining thickness is the high-adhesion polyester film A14 of 200 μ m, wherein, in described A layer, the addition of inorganic particulate is 33%, and thickness is 20 μ m, in described B layer, the addition of inorganic particulate is 18%, and thickness is 160 μ m.
Embodiment 15:
The ethyl acetate solution of configuration maleic anhydride and hydroxyethyl methylacrylate; The weight ratio of described maleic anhydride and hydroxyethyl methylacrylate is 2:3, and in described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 50%; Prepare modified master batch, gained modified master batch contains the titanium dioxide that 50% particle diameter is 3.0 μ m, zinc sulfide white and the 42% film grade polyester chip that 8% particle diameter is 2.0 μ m.
Prepare according to the method described above high-adhesion polyester film, polyester slice and modified master batch are put into respectively in the crystallizing and drying tower of 160 DEG C to all dry 4-5h.When the water ratio of polyester slice and modified master batch is during lower than 50ppm, enter respectively twin screw extruder and single screw extrusion machine according to proportioning, at 260-280 DEG C, melt extrude, wherein enter polyester slice that the material of twin screw extruder comprises 100 weight parts and the modified master batch (A layer) of 220 weight parts, enter polyester slice that the material of single screw extrusion machine comprises 100 weight parts and the modified master batch (B layer) of 30 weight parts.A layer melt filters through 400 order strainers, and B layer melt is through 150 order strainer coarse filtrations, and 400 order strainer essences are filtered, and extrude by T-shaped die head, obtain ABA structure melt (the three-layer co-extruded structure of ABA); By the 15-20 DEG C of cooling slab of cold drum, 3.0 times of longitudinal stretchings at 70-90 DEG C, be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, solution be uniformly coated on to two surfaces up and down of polyester film (basic unit), coat-thickness is 4.0 μ m.3.0 times of cross directional stretchs at 100-130 DEG C, at 170-210 DEG C, carry out heat setting type processing, under the microwave power of 50kW, carry out modify and graft and process after 0.5 minute, rolling, cuts, obtaining thickness is the high-adhesion polyester film A15 of 250 μ m, wherein, in described A layer, the addition of inorganic particulate is 40%, and thickness is 15 μ m, in described B layer, the addition of inorganic particulate is 13%, and thickness is 220 μ m.
The adhesive property test chart of the polyester film A11-A15 that table 4 embodiment 11-15 makes
Comparative example 1
Prepare polyester film according to the preparation method described in embodiment 1, in preparation process, be not coated with the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, do not carry out microwave modification grafting processing, but directly carry out rolling and cut after heat setting type is processed, obtain sun power backboard polyester film B1.
Comparative example 2
Prepare polyester film according to the preparation method described in embodiment 2, in preparation process, the power of microwave modification grafting processing is 70kW, and the time is 2 minutes, obtains sun power backboard polyester film B2.
Comparative example 3
B3 is the polyester film that the product grade of Sichuan Dongcai Technology Group Co., Ltd's production is DS11.
Comparative example 4
B4 is the polyester film 238 that du pont company produces.
Table 5 comparative example 1-4 gained polyester film B1-B4 adhesive property test chart
If table 2 is to as shown in table 5, high-adhesion polyester film A1-A15 provided by the invention compares with the adhesive property of the polyester film B1-B4 in comparative example, high-adhesion polyester film provided by the invention has better adhesive property, therefore can overcome the break-off that sun power backboard in use produces.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.Every equalization that content is done according to the present invention changes and modifies, and is all encompassed in the scope of the claims of the present invention.
Claims (5)
1. a high-adhesion polyester film, is characterized in that, described polyester film comprises basic unit, and the both sides of described basic unit are provided with high tack coat, and described high bonding layer material is the multipolymer of maleic anhydride and hydroxyethyl methylacrylate; Described maleic anhydride and hydroxyethyl methylacrylate copolymer grafted are in described substrate surface;
The base material of described polyester film is polyethylene terephthalate, polybutylene terephthalate or Polyethylene Naphthalate;
Described basic unit is that individual layer is extruded structure, and described basic unit is added with inorganic particulate, and the addition of described inorganic particulate is that percentage ratio is weight percentage described in 0.5-20%();
Or described basic unit is the three-layer co-extruded structure of ABA, in described A layer, the addition of inorganic particulate is 2.4-40%, and in described B layer, the addition of inorganic particulate is 0.5-20%;
Above-mentioned polyester film is by microwave modification grafting processing in preparation process, and microwave power is 1-20kW, and the grafting treatment time is 1-2min; Or microwave power is 30-50kW, the grafting treatment time is 0.5-1min.
2. high-adhesion polyester film according to claim 1, is characterized in that, described basic unit is the three-layer co-extruded structure of ABA, and the thickness of described basic unit is 150-350 μ m, and the thickness of described A layer is 5-30 μ m, and the thickness of described B layer is 90-340 μ m.
3. the preparation method of the high-adhesion polyester film described in claim 1 or 2, is characterized in that, described preparation method comprises the steps:
(1) polyester slice and modified master batch are put in crystallizing and drying tower dryly, entered forcing machine after dry and melt extrude, cooling slab, longitudinal stretching;
The weight ratio of described polyester slice and modified master batch is 100:1-220;
Described modified master batch comprises that particle diameter is inorganic particulate and the film grade polyester chip of 0.2-3.5 μ m; In described modified master batch, the weight percentage of inorganic particulate is 45-58%, and the weight percentage of film grade polyester chip is 42-55%;
(2) be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, by solution coat, on two surfaces up and down of step (1) gained base material, coating thickness is 0.1-5 μ m;
(3) step (2) gained base material is carried out to cross directional stretch, heat setting type processing, after microwave modification grafting is processed, rolling, cuts, and obtains described high-adhesion polyester film;
When microwave power is 1-20kW, the grafting treatment time is 1-2min; When microwave power is 30-50kW, the grafting treatment time is 0.5-1min.
4. the preparation method of high-adhesion polyester film according to claim 3, it is characterized in that, in the solution of described step (2), the weight ratio of maleic anhydride and hydroxyethyl methylacrylate is 1:0.4-2.4, and the content of maleic anhydride and hydroxyethyl methylacrylate is that percentage ratio is weight percentage described in 20-50%().
5. a solar cell backboard, is characterized in that, described backboard comprises the high-adhesion polyester film described in claim 1 or 2.
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| US11879669B2 (en) * | 2020-04-07 | 2024-01-23 | Institute Of Energy Research, Jiangxi Academy Of Sciences | Flat-plate water-heating photovoltaic/thermal module and production process thereof |
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| CN106626645B (en) * | 2015-10-29 | 2019-07-23 | 宁波长阳科技股份有限公司 | A kind of solar cell backboard and preparation method thereof |
| CN106218157A (en) * | 2016-07-26 | 2016-12-14 | 无锡中洁能源技术有限公司 | Solar cell backboard containing high tack coat |
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