CN101260196B - White polyester solar energy battery back film and preparation method thereof - Google Patents
White polyester solar energy battery back film and preparation method thereof Download PDFInfo
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- CN101260196B CN101260196B CN 200810023253 CN200810023253A CN101260196B CN 101260196 B CN101260196 B CN 101260196B CN 200810023253 CN200810023253 CN 200810023253 CN 200810023253 A CN200810023253 A CN 200810023253A CN 101260196 B CN101260196 B CN 101260196B
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The invention relates to a white polyester solar cell back film and a preparation method thereof, belonging to the polyester film field. The white polyester solar cell back film consists of a polyester chip and a white polyester master batch, wherein the weight percent ratio of the polyester chip and the white polyester master batch is between 1.0:1 and 9.0:1; the white polyester master batch comprises the following components in weight percent: 35 to 89.4 percent of polyester chip, 0.5 to 10 percent of silicon dioxide, 10 to 50 percent of titanium dioxide and 0.1 to 5 percent of ultraviolet light absorbent; moreover, the silicon dioxide undergoes organic surface treatment with the particle diameter ranging between 10 and 100 nm, and the titanium dioxide also undergoes organic surface treatment with the particle diameter ranging between 100 and 1,000 nm. The white polyester solar cell back film has the characteristics of excellent light tight performance, insulativity, aging resistance and barrier property.
Description
Technical field
The present invention relates to a kind of white polyester solar energy battery back film and preparation method thereof, belong to the polyester film field.
Background technology
Polyester film is generally water white transparency, glossy, the film that obdurability and elasticity are all good, compare with other plastics films, have that relative density is big, tensile strength is high, unit elongation is moderate, shock strength is big, ventilation property is little, good heat resistance and transparency height and advantage such as nontoxic, and be widely used in wrapping material.Along with the develop rapidly of science and technology, polyester film is being applied aspect electrical condenser, sensitive materials, phonotape and videotape and the solar cell etc.As CN101065849A disclosed " highly adhesive polyester film and use its back protection film of solar cell "; constitute by polyester film and the resin coating that is coated on this polyester film one side; before the crystalline orientation of polyester film finishes; the resin coating masking liquid is coated on the polyester film, carries out drying, stretching again, the thermal treatment setting forms the highly adhesive polyester film.This solar cell keeps film owing to be double-layer structure, complex manufacturing technology, and need special equipment hot-work, during not only manufacturing cost height, and finished surface coating layer, the easy quilt of surface coated layer is scraped and is taken off the impaired degradation that causes.In addition because resin coating is to be made of resin and linking agent, this resin is formed by combining by vibrin, acrylic resin and polyvinyl alcohol, and polymkeric substance or trimeric cyanamide, urea resin or the Resins, epoxy of linking agent Han You oxazolinyl, because the tunicle masking liquid must use solvent in preparation process, and conventional solvent contains volatilizable organic compound, therefore in making polyester film and use, volatilizable organic compound causes certain harm to environment.And CN1286911C disclosed " light tight type polyester film of a kind of black and preparation method thereof "; constitute by polyester slice, carbon black type black polyester masterbatch and the compound black polyester masterbatch of carbon black organic dye; it is even that this light tight type polyester film can reach degree of blackness; apparent light; characteristics such as Heat stability is good, but not ageing-resistant, barrier property is relatively poor; decoration, packing etc. can only be used for, and the protective membrane of solar cell can not be used for.
Summary of the invention
It is good to the purpose of this invention is to provide a kind of opacifying property, preferably white polyester solar energy battery back film of resistance to deterioration and barrier and preparation method thereof.
The present invention is that the technical scheme that achieves the above object is: a kind of white polyester solar energy battery back film, it is characterized in that: form by polyester slice and white polyester masterbatch, by ratio of weight and the number of copies, polyester slice is 1.0-9.0 with white polyester masterbatch ratio: 1, described white polyester masterbatch contains following component, by weight percentage, the polyester slice of 35%-89.4%, the silicon-dioxide of 0.5%-10%, the titanium dioxide of 10%-50% and the ultraviolet absorbers of 0.1-5%, silicon-dioxide is through organising surface treatment, and particle diameter is at 10-100nm, and titanium dioxide is through the surface treatment that organises, particle diameter is at 100-1000nm.
The preparation method of white polyester solar energy battery back film of the present invention is characterized in that:
(1), by weight percentage, the polyester slice of the silicon-dioxide of 0.5%-10% and 10%-20% carried out surface treatment under the molten state in twin screw extruder and extrude make master batch, grind stand-by, equally the titanium dioxide of 10%-50% is carried out surface treatment with the 25%-69.4% polyester slice under the molten state in twin screw extruder and extrude make master batch, grinding is stand-by, the ultraviolet absorbers of aforementioned two kinds of master batches and 0.1-5% in high speed mixer behind the thorough mixing, is extruded with twin screw extruder and to be made the white polyester masterbatch;
(2), with polyester slice and white polyester masterbatch by 1.0-9.0: 1 put into the high speed mixer thorough mixing after, in vacuum drum under 60-100 ℃ of temperature pre-crystallization 3-6 hour;
(3), with the dry 2-6h under 120-170 ℃ of temperature of the batch mixing after the pre-crystallization;
(4), dried batch mixing is sent into fusion under 270-300 ℃ of temperature in the forcing machine, extruded, casts sheet, make sheet;
(5), sheet preheating under 50-85 ℃ of temperature, enter 110 ℃-50 ℃ far-infrared heating district, with the linear velocity longitudinal stretching of 3m/min-5m/min, the longitudinal stretching multiplying power is at 1.5-3.5;
(6), will be after preheating under the 90-135 ℃ of temperature through the diaphragm of longitudinal stretching, cross directional stretch under 100-150 ℃ of temperature again, the stretching ratio of cross directional stretch is at 1.5-3.8;
(7), diaphragm is finalized the design under 200-240 ℃ of temperature condition the back rolling.
White polyester solar energy battery back film of the present invention is made up of polyester slice and white polyester masterbatch, and the white polyester masterbatch adopts silicon-dioxide, titanium dioxide and ultraviolet absorbers, owing to added nano level silicon-dioxide, the degree of crystallinity of solar battery back film is obviously improved, and because of its surface treatment of silicon-dioxide through organising, carboxyl is introduced on surface at silicon-dioxide, make between silicon-dioxide and polyester matrix and combine with chemical bond, thereby both bonding forces have been improved, make this solar battery back film have good barrier and low water absorbable, prevented water effectively, oxygen, corrodibility gas-liquids etc. are to the erosion of solar cell.The present invention has added surface treated titanium dioxide, improve titanium dioxide by light activatory character, make titanium dioxide in solar battery back film, have dispersiveness and opacifying property preferably, and the titanium dioxide of white is with after ultraviolet absorbers mixes, make this solar battery back film in the good physical that keeps original polyester film, have better opacifying property and ageing resistance, improved the work-ing life of solar cell.The present invention adopts preparation white polyester masterbatch earlier, make notacoria with the polyester slice blend again, can guarantee the thorough mixing of material, especially titanium dioxide and silica sphere are all through the processing that organises, so in solar battery back film, have dispersed preferably, batch mixing to polyester slice and white polyester masterbatch carries out the pre-crystallization of low temperature earlier in addition, carry out drying treatment again, stopped the problem of the batch mixing caking that direct high temperature drying causes, the white that makes solar battery back film more evenly, stable performance.The present invention can adopt existing processing units can make white polyester solar energy battery back film of the present invention because suitability for industrialized production is stable, and production technique is good, can reduce manufacturing cost.
Embodiment
White polyester solar energy battery back film of the present invention, by polyester slice and white polyester masterbatch component, by ratio of weight and the number of copies, polyester slice is 1.0-9.0 with white polyester masterbatch ratio: 1, this polyester slice adopts bottle level or film level, and specifically ratio of weight and number is as shown in table 1,
Table 1
| The component title | Embodiment 1 | Embodiment 2 | Embodiment 3 | Implementation column 4 | Embodiment 5 | Embodiment 6 |
| Polyester slice | 1 | 3 | 5 | 6 | 8 | 9 |
| The white polyester masterbatch | 1 | 1 | 1 | 1 | 1 | 1 |
By weight percentage, white polyester masterbatch of the present invention has the polyester slice of following component: 35%-89.4%, the silicon-dioxide of 0.5%-10%, the titanium dioxide of 10%-50% and the ultraviolet absorbers of 0.1-5%, silicon-dioxide be through organise surface treatment and particle diameter at 10-100nm, titanium dioxide is at 100-1000nm through organise surface treatment and particle diameter.This white polyester masterbatch is polyester slice, the silicon-dioxide of 1%-7%, the titanium dioxide of 23%-40% and the ultraviolet absorbers of 1-3% of 50%-75% preferably.The polyester slice that is used for the white polyester masterbatch is selected polyester slice with high viscosity for use, and ultraviolet absorbers is selected benzotriazole category or benzophenone for use, and concrete weight percent is shown in Table 2,
Table 2
| White polyester masterbatch component | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 |
| Polyester slice | 35 | 50 | 55 | 65 | 75 | 89.4 |
| Silicon-dioxide | 10 | 7 | 5 | 3 | 1 | 0.5 |
| Titanium dioxide | 50 | 40 | 38 | 30 | 23 | 10 |
| Ultraviolet absorbers | 5 | 3 | 2 | 2 | 1 | 0.1 |
The preparation method of white polyester solar energy battery back film of the present invention is as follows:
(1), by weight percentage, the polyester slice of the silicon-dioxide of 0.5%-10% and 10%-20% is carried out surface treatment under the molten state and extrude and make master batch in twin screw extruder, grind stand-by, equally the polyester slice of the titanium dioxide of 10%-50% and 25%-69.4% is carried out surface treatment under the molten state in twin screw extruder and extrude and make master batch, grind stand-by, with the ultraviolet absorbers of aforementioned two kinds of master batches and 0.1-5% in mixer behind the thorough mixing, rotating speed 〉=the 300r/min of mixer extrudes with twin screw extruder and to make the white polyester masterbatch.The concrete weight percent of this white polyester masterbatch can be as shown in table 2.
(2), with polyester slice and white polyester masterbatch by 1.0-9.0: 1 parts by weight are put into the mixer thorough mixing, rotating speed 〉=the 300r/min of mixer, polyester slice and the concrete ratio of weight and number of white polyester masterbatch can be as shown in table 1, again in vacuum drum with under 60-100 ℃ the temperature pre-crystallization 3-6 hour.
(3), with the dry 2-6h under 120-170 ℃ of temperature of the batch mixing after the pre-crystallization, moisture controlled is being lower than 30ppm.
(4), dried batch mixing is sent into fusion under 270-300 ℃ of temperature in the forcing machine, extruded, casts sheet, make sheet;
(5), sheet preheating under 50-85 ℃ of temperature earlier, enter 110 ℃-50 ℃ far-infrared heating district again, with the linear velocity longitudinal stretching of 3m/min-5m/min, the longitudinal stretching multiplying power is controlled at 1.5-3.5.
(6), will under 90-135 ℃ of temperature, carry out preheating through the diaphragm of longitudinal stretching, cross directional stretch under 100-150 ℃ of temperature again, the stretching ratio of cross directional stretch is controlled at 1.5-3.8.
(7), diaphragm finalizes the design under 200-240 ℃ of temperature condition, last rolling makes white polyester solar energy battery back film.
Respectively various embodiments of the present invention are tested, test result sees Table 3.
Table 3
As can be seen from Table 3, white polyester solar energy battery back film of the present invention has good opacifying property, insulating property and resistance to deterioration and barrier preferably.
Claims (4)
1. white polyester solar energy battery back film, it is characterized in that: form by polyester slice and white polyester masterbatch, by ratio of weight and the number of copies, polyester slice is 1.0-9.0 with white polyester masterbatch ratio: 1, wherein, described white polyester masterbatch contains following component, by weight percentage, the polyester slice of 35%-89.4%, the silicon-dioxide of 0.5%-10%, the titanium dioxide of 10%-50% and the ultraviolet absorbers of 0.1-5%, silicon-dioxide is through organising surface treatment, and particle diameter is at 10-100nm, and titanium dioxide is through organising surface treatment, and particle diameter is at 100-1000nm.
2. white polyester solar energy battery back film according to claim 1 is characterized in that: the polyester slice that described white polyester masterbatch is 50%-75%, the silicon-dioxide of 1%-7%, the titanium dioxide of 23%-40% and the ultraviolet absorbers of 1-3%.
3. white polyester solar energy battery back film according to claim 1 is characterized in that: described ultraviolet absorbers is selected benzotriazole category or benzophenone for use.
4. the preparation method of a white polyester solar energy battery back film is characterized in that:
(1), by weight percentage, the polyester slice of the silicon-dioxide of 0.5%-10% and 10%-20% carried out surface treatment under the molten state in twin screw extruder and extrude make master batch, grind stand-by, equally the polyester slice of the titanium dioxide of 10%-50% and 25%-69.4% is carried out surface treatment under the molten state in twin screw extruder and extrude make master batch, grinding is stand-by, the ultraviolet absorbers of aforementioned two kinds of master batches and 0.1-5% in mixer behind the thorough mixing, is extruded with twin screw extruder and to be made the white polyester masterbatch;
(2), by ratio of weight and the number of copies, with polyester slice and white polyester masterbatch by 1.0-9.0: 1 put into the mixer thorough mixing after, in vacuum drum under 60-100 ℃ of temperature pre-crystallization 3-6 hour;
(3), with the dry 2-6h under 120-170 ℃ of temperature of the batch mixing after the pre-crystallization;
(4), dried batch mixing is sent into fusion under 270-300 ℃ of temperature in the forcing machine, extruded, casts sheet, make sheet;
(5), sheet preheating under 50-85 ℃ of temperature, enter 110 ℃-50 ℃ far-infrared heating district, with the linear velocity longitudinal stretching of 3m/min-5m/min, the longitudinal stretching multiplying power is at 1.5-3.5;
(6), will be after preheating under the 90-135 ℃ of temperature through the diaphragm of longitudinal stretching, cross directional stretch under 100-150 ℃ of temperature again, the stretching ratio of cross directional stretch is at 1.5-3.8;
(7), diaphragm is finalized the design under 200-240 ℃ of temperature condition the back rolling.
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| CN 200810023253 CN101260196B (en) | 2008-04-07 | 2008-04-07 | White polyester solar energy battery back film and preparation method thereof |
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| CN101260196B true CN101260196B (en) | 2011-03-23 |
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|---|---|---|---|---|
| KR101268217B1 (en) * | 2010-03-31 | 2013-06-10 | 코오롱인더스트리 주식회사 | Thermo-shrinkable polyester mono-layer film |
| CN101967272B (en) * | 2010-05-19 | 2012-05-30 | 四川东材科技集团股份有限公司 | Method for preparing polyester film for solar cell backsheet film |
| CN102110728B (en) * | 2010-08-11 | 2012-11-14 | 宁波长阳科技有限公司 | Backing film of solar battery and preparation method thereof |
| CN102492269B (en) * | 2011-12-06 | 2014-02-26 | 宁波长阳科技有限公司 | Weather-resistant white master batch, weather-resistant polyester material and preparation methods of weather-resistant white master batch and weather-resistant polyester material |
| CN103435983A (en) * | 2013-08-06 | 2013-12-11 | 苏州金海薄膜科技发展有限公司 | Transparent colored heat and ultraviolet insulation film and preparation method thereof |
| JP6352209B2 (en) * | 2015-03-25 | 2018-07-04 | 富士フイルム株式会社 | POLYESTER FILM AND PROCESS FOR PRODUCING THE SAME, SOLAR CELL BACK PROTECTION SHEET |
| CN105038156A (en) * | 2015-08-28 | 2015-11-11 | 佛山杜邦鸿基薄膜有限公司 | Solar cell backboard polyester film with high reflectivity and preparing method of solar cell backboard polyester film |
| CN106905671A (en) * | 2016-12-23 | 2017-06-30 | 宁波长阳科技股份有限公司 | A kind of PET water vapour locking is every master batch and preparation method thereof |
| CN116814048A (en) * | 2023-06-29 | 2023-09-29 | 常州勤邦新材料科技有限公司 | Functional master batch for producing UV-resistant polyester chips |
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| JP2004202899A (en) * | 2002-12-26 | 2004-07-22 | Mitsubishi Polyester Film Copp | Biaxially stretched laminated polyester film |
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- 2008-04-07 CN CN 200810023253 patent/CN101260196B/en active Active
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Owner name: JIANGSU YUXING FILM TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: CHANGZHOU ELECTRICAL INSULATION WORKS CO., LTD. Effective date: 20111125 |
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Effective date of registration: 20111125 Address after: 213023 Jiangsu, Changzhou Province Economic Development Zone Clock Tower in the west of the road 8-8 Patentee after: Jiangsu Yuxing Film Technology Co.,Ltd. Address before: 213023 No. 264, Xinshi Road, Changzhou, Jiangsu Patentee before: Changzhou Electrical Insulation Works Co., Ltd. |