CN103013369A - 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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- CN103013369A CN103013369A CN2012104552774A CN201210455277A CN103013369A CN 103013369 A CN103013369 A CN 103013369A CN 2012104552774 A CN2012104552774 A CN 2012104552774A CN 201210455277 A CN201210455277 A CN 201210455277A CN 103013369 A CN103013369 A CN 103013369A
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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 the 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 is produced, that " P " represents is polyethylene terephthalate film (PET), and that " K " represents is PVDF membrane (PVDF).Because the fluorine film has the advantages such as remarkable chemical resistant properties, ageing-resistant, corrosion-resistant, high barrier, therefore each company develops all kinds of fluorine films one after another, such as THV(tetrafluoroethylene-hexafluoroethylene-vinylidene), ECTFE(ethene chlorotrifluoroethylene), the ETFE(ethylene tetrafluoroethylene copolymer) etc., be applied in the solar battery back film successively.But generally the fluorine film exists surface energy lower, the shortcoming that is difficult to bond, and there are 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 that exists in the existing solar energy back film or the defective that comes 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.Can layering or come off by the sun power backboard of this polyester film preparation.
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 the hydroxyethyl methylacrylate multipolymer, also has Van der Waals force between multipolymer and the substrate surface.
Further, described basic unit is added with inorganic particulate, and the addition of described inorganic particulate is that the described percentage ratio of 0.5-20%(is weight percentage).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 the 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, also can be the three-layer co-extruded structure of ABA.
Further, be added with inorganic particulate in the described A layer, addition is 0.5-40%, and the addition of inorganic particulate is 0-20% in the described B layer.
Further, described basic unit is the three-layer co-extruded structure of ABA, and the addition of inorganic particulate is 0.5-40% in the described A layer, and the addition of inorganic particulate is 0.5-20% in the described B layer.
Preferably, in the described A layer addition of inorganic particulate greater than the addition of inorganic particulate in the B layer.
Preferably, the addition of inorganic particulate is 2.4-40%, 3-10%, 18-25%, 15-30% or 20-35% in the described A layer.Preferably, the addition of inorganic particulate is 1-10%, 12-18%, 5-13% or 8-16% in the described B layer.
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 into drying in the crystallizing and drying tower, enter forcing machine after the drying 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, on up and down two surfaces of step (1) gained base material, coating thickness is 0.1-5 μ m with solution coat;
(3) step (2) gained base material is carried out cross directional stretch, heat setting type is processed, and after the microwave modification grafting was processed, rolling was cut, and obtains described high-adhesion polyester film.
Described modified master batch (claiming again the 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 the 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 ℃; Melt temperature is 260-300 ℃, or 260-280 ℃; The longitudinal stretching temperature is 70-100 ℃, or 80-100 ℃, stretch ratio is 2.8-3.2; The cross directional stretch temperature is 100-130 ℃, and stretch ratio is 2.8-3.2; Heat setting temperature is 170-210 ℃ or 190-220 ℃; Microwave power is 1-50kW.Usually, the total length of microwave oven is 15-50m.
When the microwave modification grafting was processed, microwave power was 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, gained polyester film adhesive property was better when longer.
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 the described percentage ratio of 20-50%(is weight percentage).
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, the weight percentage of maleic anhydride and hydroxyethyl methylacrylate is 20%, 25%, 30%, 35% in the described coating fluid, 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 the described step (3), the microwave modification grafting treatment time is 1-2 minute.
Further, the weight ratio of the polyester slice in the 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.Perhaps, described backboard comprises the high-adhesion polyester film by the aforesaid method preparation.
Compared with prior art, the present invention adopts the 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, TPT, the TPE, the composite solar battery backboards such as KPK, KPE that adopt polyester film provided by the invention to make, or the solar cell backboard film made from polyester film single or double provided by the invention coating fluoro-containing coating, can be under-60 ℃ of-100 ℃ 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.
Description of 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 used material and facility of the present invention is current material and equipment, and for example: used polyester slice and inorganic particulate are product common on the market, maleic anhydride, and hydroxyethyl methylacrylate and ethyl acetate are also buied in 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 into drying in the crystallizing and drying tower, enter forcing machine after the drying and melt extrude, cooling slab, longitudinal stretching;
(2) be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, on up and down two surfaces of step (1) gained base material, coating thickness is 0.1-5 μ m with solution coat;
(3) step (2) gained base material is carried out cross directional stretch, heat setting type is processed, and after the microwave modification grafting was processed, rolling was cut, and obtains described high-adhesion polyester film.
Prepare according to the method described above the 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, the tackiness agent aspect is attached on the float glass, in 23 ℃, the atmosphere of 65%RH, placed 1 day, peel off with 90 ° of peel angles, observe PSA at Restzustand on glass, estimate with the described grade standard of table 1.
Above-mentioned PSA uses and contains amino acrylate copolymer, and preferred, this PSA is that 86 % by mole n-butyl acrylate and 14 % by mole methyl acrylate form by acrylic component.
Table 1 adhesive property grade standard
| Grade | Standard | Cohesive force |
| 5 | The PSA revolution mark is less than 10% | Fabulous |
| 4 | The PSA revolution mark be 10% or more than, less than 20% | Well |
| 3 | The PSA revolution mark be 20% or more than, less than 30% | Better |
| 2 | The PSA revolution mark be 30% or more than, less than 40% | Bad |
| 1 | The PSA revolution mark surpasses 40% | Very bad |
Percentage ratio is weight percentage described in the following embodiment, 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 the described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 50%; Adopt dual-screw pelletizer to prepare the modified poly ester master batch, the 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 the high-adhesion polyester film, the modified master batch of the polyester slice of 100 weight parts and 5 weight parts put into dry 4-5h in 160 ℃ the crystallizing and drying tower, when the water ratio of polyester slice and modified master batch is lower than 50ppm, entering forcing machine melt extrudes under 260-280 ℃, through 150 order strainer coarse filtrations, 400 order strainers essence is filtered, and head is extruded; With 15-20 ℃ of cold drum cooling slab, 3.0 times of 70-90 ℃ of lower longitudinal stretchings; Be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, solution be uniformly coated on up and down two surfaces of polyester film (basic unit), coat-thickness is 2 μ m.Lower laterally stretch 3.0 times at 100-130 ℃, carry out heat setting type under 170-210 ℃ to process, carry out modify and graft under the microwave power of 20kW and process after 1 minute, rolling is cut, 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 the described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 30%; The preparation modified master batch, the 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 the high-adhesion polyester film, the modified master batch of the polyester slice of 100 weight parts and 10 weight parts put into dry 4-5h in 160 ℃ the crystallizing and drying tower, when the water ratio of polyester slice and modified master batch is lower than 50ppm, enter forcing machine, under 260-280 ℃, melt extrude, through 150 order strainer coarse filtrations, 400 order strainers essence is filtered, head is extruded, with 15-20 ℃ of cold drum cooling slab, 3.0 times of 70-90 ℃ of lower longitudinal stretchings, be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, solution is uniformly coated on up and down two surfaces of polyester film (basic unit), coat-thickness is 2.5 μ m.Lower laterally stretch 3.0 times at 100-130 ℃, carry out heat setting type under 170-210 ℃ to process, carry out modify and graft under the microwave power of 30kW and process after 1 minute, rolling is cut, 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 the described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 40%; The preparation modified master batch, the 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 the high-adhesion polyester film, the modified master batch of the polyester slice of 100 weight parts and 20 weight parts put into dry 4-5h in 160 ℃ the crystallizing and drying tower, when the water ratio of polyester slice and modified master batch is lower than 50ppm, entering forcing machine melt extrudes under 260-280 ℃, through 150 order strainer coarse filtrations, 400 order strainers essence is filtered, and head is extruded; With 15-20 ℃ of cold drum cooling slab, 3.0 times of 70-90 ℃ of lower longitudinal stretchings, be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, solution be uniformly coated on up and down two surfaces of polyester film (basic unit), coat-thickness is 3.0 μ m.Lower laterally stretch 3.0 times at 100-130 ℃, carry out heat setting type under 170-210 ℃ to process, carry out modify and graft under the microwave power of 20kW and process after 1.5 minutes, rolling is cut, 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 the described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 30%; The preparation modified master batch, the 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 the high-adhesion polyester film, dry 4-5h in the crystallizing and drying tower that polyester slice and the 40 weight part modified master batchs of 100 weight parts are put into 160 ℃, when the water ratio of polyester slice and modified master batch is lower than 50ppm, entering forcing machine melt extrudes under 260-280 ℃, through 150 order strainer coarse filtrations, 400 order strainers essence is filtered, and head is extruded; With 15-20 ℃ of cold drum cooling slab, 3.0 times of 70-90 ℃ of lower longitudinal stretchings, be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, solution be uniformly coated on up and down two surfaces of polyester film (basic unit), coat-thickness is 3.5 μ m.Lower laterally stretch 3.0 times at 100-130 ℃, carry out heat setting type under 170-210 ℃ to process, carry out modify and graft under the microwave power of 40kW and process after 0.8 minute, rolling is cut, 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 the described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 20%; The preparation modified master batch, the 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 the high-adhesion polyester film, the modified master batch of the polyester slice of 100 weight parts and 50 weight parts put into dry 4-5h in 160 ℃ the crystallizing and drying tower, when the water ratio of polyester slice and modified master batch is lower than 50ppm, entering forcing machine melt extrudes under 260-280 ℃, through 150 order strainer coarse filtrations, 400 order strainers essence is filtered, head is extruded, with 15-20 ℃ of cold drum cooling slab, 3.0 times of 70-90 ℃ of lower longitudinal stretchings, be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, solution be uniformly coated on up and down two surfaces of polyester film (basic unit), coat-thickness is 2.0 μ m.Lower laterally stretch 3.0 times at 100-130 ℃, carry out heat setting type under 170-210 ℃ to process, carry out modify and graft under the microwave power of 50kW and process after 0.6 minute, rolling is cut, and obtains described high-adhesion polyester film A5.
The adhesive property test chart of the polyester film A1-A5 of table 2 embodiment 1-5 preparation
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 the described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 25%.
Prepare according to the method described above the high-adhesion polyester film, polyester slice and modified master batch are put into respectively in 160 ℃ the crystallizing and drying tower equal dry 4-5h.When the water ratio of polyester slice and modified master batch is lower than 50ppm, enter respectively twin screw extruder and single screw extrusion machine according to proportioning, under 260-280 ℃, melt extrude, the material that wherein enters twin screw extruder comprises the polyester slice of 100 weight parts and the modified master batch of 15 weight parts (A layer), and the material that enters single screw extrusion machine comprises the polyester slice of 100 weight parts and the modified master batch of 5 weight parts (B layer).A layer melt filters through 400 order strainers, and B layer melt is through 150 order strainer coarse filtrations, and 400 order strainers essence is filtered, and extrudes by T-shaped die head, obtains the three-layer co-extruded structure melt of ABA; With 15-20 ℃ of cold drum cooling slab, 3.2 times of 70-90 ℃ of lower longitudinal stretchings, be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, solution be uniformly coated on up and down two surfaces of polyester film (basic unit), coat-thickness is 0.1-2 μ m.3.2 times of 100-130 ℃ of lower laterally stretchings, carrying out heat setting type under 170-210 ℃ processes, carry out modify and graft under the microwave power of 1kW and process after 2 minutes, rolling is cut, obtaining thickness is the high-adhesion polyester film A6 of 150 μ m, wherein, the addition of inorganic particulate is 6.5% in the described A layer, and thickness is 30 μ m, the addition of inorganic particulate is 2.4% in the described B layer, 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 the described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 35%.
Prepare according to the method described above the high-adhesion polyester film, polyester slice and modified master batch are put into respectively in 160 ℃ the crystallizing and drying tower equal dry 4-5h.When the water ratio of polyester slice and modified master batch is lower than 50ppm, enter respectively twin screw extruder and single screw extrusion machine according to proportioning, under 260-280 ℃, melt extrude, the material that wherein enters twin screw extruder comprises the polyester slice of 100 weight parts and the modified master batch of 50 weight parts (A layer), and the material that enters single screw extrusion machine comprises the polyester slice of 100 weight parts and the modified master batch of 30 weight parts (B layer).A layer melt filters through 400 order strainers, and B layer melt is through 150 order strainer coarse filtrations, and 400 order strainers essence is filtered, and extrudes by T-shaped die head, obtains ABA structure melt; With 15-20 ℃ of cold drum cooling slab, 2.8 times of 70-90 ℃ of lower longitudinal stretchings, be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, solution be uniformly coated on up and down two surfaces of polyester film (basic unit), coat-thickness is 2.5 μ m.2.8 times of 100-130 ℃ of lower laterally stretchings, carrying out heat setting type under 170-210 ℃ processes, carry out modify and graft under the microwave power of 10kW and process after 1.5 minutes, rolling is cut, obtaining thickness is the high-adhesion polyester film A7 of 350 μ m, wherein, the addition of inorganic particulate is 17% in the described A layer, and thickness is 5 μ m, the addition of inorganic particulate is 12% in the described B layer, 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 the described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 45%; The preparation modified master batch, the 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 the high-adhesion polyester film, polyester slice and modified master batch are put into respectively in 160 ℃ the crystallizing and drying tower equal dry 4-5h.When the water ratio of polyester slice and modified master batch is lower than 50ppm, enter respectively twin screw extruder and single screw extrusion machine according to proportioning, under 260-280 ℃, melt extrude, the material that wherein enters twin screw extruder comprises the polyester slice of 100 weight parts and the modified master batch of 30 weight parts (A layer), and the material that enters single screw extrusion machine comprises the polyester slice of 100 weight parts and the modified master batch of 18 weight parts (B layer).A layer melt filters through 400 order strainers, and B layer melt is through 150 order strainer coarse filtrations, and 400 order strainers essence is filtered, and extrudes by T-shaped die head, obtains ABA structure melt; With 15-20 ℃ of cold drum cooling slab, 3.0 times of 70-90 ℃ of lower longitudinal stretchings, be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, solution be uniformly coated on up and down two surfaces of polyester film (basic unit), coat-thickness is 3.0 μ m.Lower laterally stretch 3.0 times at 100-130 ℃, carry out heat setting type under 170-210 ℃ to process, carry out modify and graft under the microwave power of 25kW and process after 1.2 minutes, rolling is cut, 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 the described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 30%.
Prepare according to the method described above the high-adhesion polyester film, polyester slice and modified master batch are put into respectively in 160 ℃ the crystallizing and drying tower equal dry 4-5h.When the water ratio of polyester slice and modified master batch is lower than 50ppm, enter respectively twin screw extruder and single screw extrusion machine according to proportioning, under 260-280 ℃, melt extrude, the material that wherein enters twin screw extruder comprises the polyester slice of 100 weight parts and the modified master batch of 40 weight parts (A layer), and the material that enters single screw extrusion machine comprises the polyester slice of 100 weight parts and the modified master batch of 20 weight parts (B layer).A layer melt filters through 400 order strainers, and B layer melt is through 150 order strainer coarse filtrations, and 400 order strainers essence is filtered, and extrudes by T-shaped die head, obtains ABA structure melt; With 15-20 ℃ of cold drum cooling slab, 3.0 times of 70-90 ℃ of lower longitudinal stretchings, be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, solution be uniformly coated on up and down two surfaces of polyester film (basic unit), coat-thickness is 3.5um-5 μ m.3.0 times of 100-130 ℃ of lower laterally stretchings, carrying out heat setting type under 170-210 ℃ processes, carry out modify and graft under the microwave power of 30kW and process after 1 minute, rolling is cut, obtaining thickness is the high-adhesion polyester film A9 of 180 μ m, wherein, the addition of inorganic particulate is 15% in the described A layer, and thickness is 25 μ m, the addition of inorganic particulate is 9% in the described B layer, 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 the described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 50%.
Prepare according to the method described above the high-adhesion polyester film, polyester slice and modified master batch are put into respectively in 160 ℃ the crystallizing and drying tower equal dry 4-5h.When the water ratio of polyester slice and modified master batch is lower than 50ppm, enter respectively twin screw extruder and single screw extrusion machine according to proportioning, under 260-280 ℃, melt extrude, the material that wherein enters twin screw extruder comprises the polyester slice of 100 weight parts and the modified master batch of 50 weight parts (A layer), and the material that enters single screw extrusion machine comprises the polyester slice of 100 weight parts and the modified master batch of 30 weight parts (B layer).A layer melt filters through 400 order strainers, and B layer melt is through 150 order strainer coarse filtrations, and 400 order strainers essence is filtered, and extrudes by T-shaped die head, obtains ABA structure melt; With 15-20 ℃ of cold drum cooling slab, 3.0 times of 70-90 ℃ of lower longitudinal stretchings, be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, solution be uniformly coated on up and down two surfaces of polyester film (basic unit), coat-thickness is 4.0 μ m.3.0 times of 100-130 ℃ of lower laterally stretchings, carrying out heat setting type under 170-210 ℃ processes, carry out modify and graft under the microwave power of 50kW and process after 0.5 minute, rolling is cut, obtaining thickness is the high-adhesion polyester film A10 of 300 μ m, wherein, the addition of inorganic particulate is 18% in the described A layer, and thickness is 10 μ m, the addition of inorganic particulate is 12% in the described B layer, 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 the described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 25%; The preparation modified master batch, the 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 the high-adhesion polyester film, polyester slice and modified master batch are put into respectively equal dry 4-5h in 160 ℃ the crystallizing and drying tower.When the water ratio of polyester slice and modified master batch is lower than 50ppm, enter respectively twin screw extruder and single screw extrusion machine according to proportioning, under 260-280 ℃, melt extrude, the material that wherein enters twin screw extruder comprises the polyester slice of 100 weight parts and the modified master batch of 5 weight parts (A layer), and 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 strainers essence is filtered, and extrudes by T-shaped die head, obtains ABA structure melt; With 15-20 ℃ of cold drum cooling slab, 3.2 times of 80-100 ℃ of lower longitudinal stretchings, be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, solution be uniformly coated on up and down two surfaces of polyester film (basic unit), coat-thickness is 1 μ m.3.2 times of 100-130 ℃ of lower laterally stretchings, carrying out heat setting type under 190-200 ℃ processes, carry out modify and graft under the microwave power of 1kW and process after 2 minutes, rolling is cut, obtaining thickness is the high-adhesion polyester film A11 of 190 μ m, wherein, the addition of inorganic particulate is 2.4% in the described A layer, and thickness is 20 μ m, the addition of inorganic particulate is 0 in the described B layer, 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 the described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 35%; The preparation modified master batch, the 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 the high-adhesion polyester film, polyester slice and modified master batch are put into respectively in 160 ℃ the crystallizing and drying tower equal dry 4-5h.When the water ratio of polyester slice and modified master batch is lower than 50ppm, enter respectively twin screw extruder and single screw extrusion machine according to proportioning, under 260-280 ℃, melt extrude, the material that wherein enters twin screw extruder comprises the polyester slice of 100 weight parts and the modified master batch of 70 weight parts (A layer), and the material that enters single screw extrusion machine comprises the polyester slice of 100 weight parts and the modified master batch of 1 weight part (B layer).A layer melt filters through 400 order strainers, and B layer melt is through 150 order strainer coarse filtrations, and 400 order strainers essence is filtered, and extrudes by T-shaped die head, obtains ABA structure melt; With 15-20 ℃ of cold drum cooling slab, 2.8 times of 70-90 ℃ of lower longitudinal stretchings, be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, solution be uniformly coated on up and down two surfaces of polyester film (basic unit), coat-thickness is 2.5 μ m.2.8 times of 100-130 ℃ of lower laterally stretchings, carrying out heat setting type under 180-210 ℃ processes, carry out modify and graft under the microwave power of 10kW and process after 1.5 minutes, rolling is cut, obtaining thickness is the high-adhesion polyester film A12 of 220 μ m, wherein, the addition of inorganic particulate is 21% in the described A layer, and thickness is 10 μ m, the addition of inorganic particulate is 0.5% in the described B layer, 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 the described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 45%; The preparation modified master batch, the 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 the high-adhesion polyester film, polyester slice and modified master batch are put into respectively in 160 ℃ the crystallizing and drying tower equal dry 4-5h.When the water ratio of polyester slice and modified master batch is lower than 50ppm, enter respectively twin screw extruder and single screw extrusion machine according to proportioning, under 260-300 ℃, melt extrude, the material that wherein enters twin screw extruder comprises the polyester slice of 100 weight parts and the modified master batch of 120 weight parts (A layer), and the material that enters single screw extrusion machine comprises the polyester slice of 100 weight parts and the modified master batch of 68 weight parts (B layer).A layer melt filters through 400 order strainers, and B layer melt is through 150 order strainer coarse filtrations, and 400 order strainers essence is filtered, and extrudes by T-shaped die head, obtains ABA structure melt; With 15-20 ℃ of cold drum cooling slab, 3.0 times of 70-90 ℃ of lower longitudinal stretchings, be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, solution be uniformly coated on up and down two surfaces of polyester film (basic unit), coat-thickness is 3.0 μ m.3.0 times of 100-130 ℃ of lower laterally stretchings, carrying out heat setting type under 170-210 ℃ processes, carry out modify and graft under the microwave power of 25kW and process after 1.2 minutes, rolling is cut, obtaining thickness is the high-adhesion polyester film A13 of 170 μ m, wherein, the addition of inorganic particulate is 27% in the described A layer, and thickness is 8 μ m, the addition of inorganic particulate is 20% in the described B layer, 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 the described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 30%; The preparation modified master batch, the 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 the high-adhesion polyester film, polyester slice and modified master batch are put into respectively in 160 ℃ the crystallizing and drying tower equal dry 4-5h.When the water ratio of polyester slice and modified master batch is lower than 50ppm, enter respectively twin screw extruder and single screw extrusion machine according to proportioning, under 260-280 ℃, melt extrude, the material that wherein enters twin screw extruder comprises the polyester slice of 100 weight parts and the modified master batch of 150 weight parts (A layer), and the material that enters single screw extrusion machine comprises the polyester slice of 100 weight parts and the modified master batch of 50 weight parts (B layer).A layer melt filters through 400 order strainers, and B layer melt is through 150 order strainer coarse filtrations, and 400 order strainers essence is filtered, and extrudes by T-shaped die head, obtains ABA structure melt; With 15-20 ℃ of cold drum cooling slab, 3.0 times of 70-90 ℃ of lower longitudinal stretchings, be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, solution be uniformly coated on up and down two surfaces of polyester film (basic unit), coat-thickness is 3.5um-5 μ m.3.0 times of 100-130 ℃ of lower laterally stretchings, carrying out heat setting type under 170-210 ℃ processes, carry out modify and graft under the microwave power of 30kW and process after 1 minute, rolling is cut, obtaining thickness is the high-adhesion polyester film A14 of 200 μ m, wherein, the addition of inorganic particulate is 33% in the described A layer, and thickness is 20 μ m, the addition of inorganic particulate is 18% in the described B layer, 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 the described solution, the content of maleic anhydride and hydroxyethyl methylacrylate is 50%; The preparation modified master batch, the 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 the high-adhesion polyester film, polyester slice and modified master batch are put into respectively in 160 ℃ the crystallizing and drying tower equal dry 4-5h.When the water ratio of polyester slice and modified master batch is lower than 50ppm, enter respectively twin screw extruder and single screw extrusion machine according to proportioning, under 260-280 ℃, melt extrude, the material that wherein enters twin screw extruder comprises the polyester slice of 100 weight parts and the modified master batch of 220 weight parts (A layer), and the material that enters single screw extrusion machine comprises the polyester slice of 100 weight parts and the modified master batch of 30 weight parts (B layer).A layer melt filters through 400 order strainers, and B layer melt is through 150 order strainer coarse filtrations, and 400 order strainers essence is filtered, and extrudes by T-shaped die head, obtains ABA structure melt (the three-layer co-extruded structure of ABA); With 15-20 ℃ of cold drum cooling slab, 3.0 times of 70-90 ℃ of lower longitudinal stretchings, be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, solution be uniformly coated on up and down two surfaces of polyester film (basic unit), coat-thickness is 4.0 μ m.3.0 times of 100-130 ℃ of lower laterally stretchings, carrying out heat setting type under 170-210 ℃ processes, carry out modify and graft under the microwave power of 50kW and process after 0.5 minute, rolling is cut, obtaining thickness is the high-adhesion polyester film A15 of 250 μ m, wherein, the addition of inorganic particulate is 40% in the described A layer, and thickness is 15 μ m, the addition of inorganic particulate is 13% in the described B layer, 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 Examples 1
Prepare polyester film according to embodiment 1 described preparation method, in the preparation process, be not coated with the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, not carrying out the microwave modification grafting processes, but after heat setting type is processed, directly carry out rolling and cut, obtain sun power backboard polyester film B1.
Comparative Examples 2
Prepare polyester film according to embodiment 2 described preparation methods, in the preparation process, the power that the microwave modification grafting is processed is 70kW, and the time is 2 minutes, obtains sun power backboard polyester film B2.
Comparative Examples 3
B3 is that the product grade that Sichuan Dongcai Technology Group Co., Ltd produces is the polyester film of DS11.
Comparative Examples 4
B4 is the polyester film 238 that du pont company is produced.
Table 5 Comparative Examples 1-4 gained polyester film B1-B4 adhesive property test chart
Such as table 2 to shown in the table 5, the adhesive property of polyester film B1-B4 in high-adhesion polyester film A1-A15 provided by the invention and the Comparative Examples is compared, high-adhesion polyester film provided by the invention has better adhesive property, therefore can overcome the break-off that the sun power backboard in use produces.
The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.Every equalization that content is done according to the present invention changes and modifies, and all is encompassed in the claim of the present invention.
Claims (10)
1. a high-adhesion polyester film is characterized in that, described polyester film comprises basic unit, 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.
2. high-adhesion polyester film according to claim 1 is characterized in that, described maleic anhydride and hydroxyethyl methylacrylate copolymer grafted are in substrate surface.
3. high-adhesion polyester film according to claim 1 is characterized in that, described basic unit is added with inorganic particulate, and the addition of described inorganic particulate is that the described percentage ratio of 0.5-20%(is weight percentage).
4. 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 addition of inorganic particulate is 2.4-40% in the described A layer, and the addition of inorganic particulate is 0.5-20% in the described B layer.
5. high-adhesion polyester film according to claim 4 is characterized in that, 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.
6. one of according to claim 1-5 the preparation method of described high-adhesion polyester film is characterized in that, described preparation method comprises the steps:
(1) polyester slice and modified master batch are put into drying in the crystallizing and drying tower, enter forcing machine after the drying and melt extrude, cooling slab, longitudinal stretching;
(2) be coated with online the ethyl acetate solution of maleic anhydride and hydroxyethyl methylacrylate, on up and down two surfaces of step (1) gained base material, coating thickness is 0.1-5 μ m with solution coat;
(3) step (2) gained base material is carried out cross directional stretch, heat setting type is processed, and after the microwave modification grafting was processed, rolling was cut, and obtains described high-adhesion polyester film.
7. high-adhesion polyester film according to claim 6, 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 the described percentage ratio of 20-50%(is weight percentage).
8. high-adhesion polyester film according to claim 6 is characterized in that, in the described step (3), the microwave modification grafting treatment time is 1-2 minute.
9. high-adhesion polyester film according to claim 6 is characterized in that, the polyester slice in the described step (1) and the weight ratio of modified master batch are 100:1-220.
10. a solar cell backboard is characterized in that, described backboard comprises the described high-adhesion polyester film of one of claim 1-5.
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