CN113462133A - High-heat-dissipation transparent anti-UV polyester film for back plate and preparation method thereof - Google Patents
High-heat-dissipation transparent anti-UV polyester film for back plate and preparation method thereof Download PDFInfo
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- CN113462133A CN113462133A CN202110781674.XA CN202110781674A CN113462133A CN 113462133 A CN113462133 A CN 113462133A CN 202110781674 A CN202110781674 A CN 202110781674A CN 113462133 A CN113462133 A CN 113462133A
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- polyester film
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
- C08K3/042—Graphene or derivatives, e.g. graphene oxides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/005—Stabilisers against oxidation, heat, light, ozone
Abstract
The invention discloses a high-heat-dissipation transparent anti-UV polyester film for a backboard and a preparation method thereof, aiming at providing the high-heat-dissipation transparent anti-UV polyester film for the backboard with good heat conductivity, and the technical scheme is that the high-heat-dissipation transparent anti-UV polyester film for the backboard comprises a transparent backboard; the polyester film comprises 75-90% of polyethylene terephthalate, 2-20% of graphene materials and 1-5% of anti-UV materials, the graphene materials comprise graphene master batches, the graphene content of the graphene master batches is 1-5%, and the graphene master batches comprise: graphene; a dispersant; an antioxidant; pet slices, the UV resistant material comprising an ultraviolet absorber; the invention relates to a light stabilizer, which is applicable to the technical field of films.
Description
Technical Field
The invention belongs to the technical field of films, and particularly relates to a high-heat-dissipation transparent anti-UV polyester film for a back plate and a preparation method thereof.
Background
Photovoltaic power generation is the generation of electric energy by the photovoltaic effect of sunlight and semiconductor materials. One important factor affecting the working efficiency is the temperature, and in order to prevent the working efficiency from decreasing, it is particularly important to improve the heat dissipation performance.
For example, chinese patent application No. (CN202010554043X) discloses a transparent anti-UV polyester film for back panels, which is prepared by adding an anti-UV material to an anti-UV polyester film, wherein the anti-UV material comprises 1% -5% of an ultraviolet absorber and 1% -5% of a light stabilizer, and compared with a common polyester film, the absorption peak in the ultraviolet band is significantly increased; the transmittance is less than 10% at the ultraviolet 380nm position; after irradiation for 200kwh, the yellowing is less than or equal to 3; after PCT48h, the breaking elongation retention rate is more than or equal to 40%, the application mainly improves the ultraviolet resistance and the aging resistance of the polyester film, and does not relate to the heat dissipation aspect.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a high-heat-dissipation transparent anti-UV polyester film for a backboard, which has good heat conductivity.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a transparent anti UV polyester film of high heat dissipation for backplate which characterized by includes:
a transparent back plate;
the polyester film comprises 75-90% of polyethylene terephthalate, 2-10% of graphene materials and 1-5% of anti-UV materials, wherein the graphene materials comprise graphene master batches, and the graphene content of the graphene master batches is 1-5%.
The invention is further configured such that the graphene master batch includes:
graphene;
a dispersant;
an antioxidant;
and (4) PET slicing.
The invention further provides that the UV resistant material comprises:
an ultraviolet absorber;
light stabilizers.
The invention is further configured to:
the ultraviolet absorbent comprises one or more of salicylic acid esters, benzophenones, benzotriazoles, benzoates and other organic compounds.
The invention is further configured to:
the light stabilizer comprises one or more of light stabilizer NBC, light stabilizer 770, light stabilizer 2002, light stabilizer 1084 and the like.
The invention is further configured to:
the heat conductivity coefficient of the high-heat-dissipation transparent anti-UV polyester film is more than or equal to 0.4w/(m × k).
The invention is further configured to:
the transmittance of the high-heat-dissipation transparent anti-UV polyester film at the ultraviolet 380nm position is less than 10%.
The invention is further configured to:
after the high-heat-dissipation transparent UV-resistant polyester film is irradiated for 200kwh, the yellowing is less than or equal to 3.
The invention is further configured to:
after the high-heat-dissipation transparent UV-resistant polyester film pct is tested for 48 hours, the breaking elongation retention rate is more than or equal to 40%.
A preparation method of the high-heat-dissipation transparent anti-UV polyester film applied to the back plate comprises the following steps:
s1, preparing graphene master batches, adding a dispersing agent and an antioxidant into the graphene and PET slices in an environment of 260-280 ℃, and extruding after melting to obtain the graphene master batches;
s2, uniformly mixing the polyethylene terephthalate, the UV resistant material and the graphene master batch prepared in the S1 according to the using amount, and pre-crystallizing in a pre-crystallizer to obtain a product, wherein the pre-crystallizing temperature is 150-160 ℃;
s3, drying the product in the S2 in a drying tower at the temperature of 170 ℃ and 180 ℃ to obtain a dried mixture;
s4, heating the mixture in the S3 to 260-280 ℃ in an extruder to obtain a molten mixture, extruding the molten mixture, and quenching the extruded molten mixture on a quenching drum to form a cast sheet;
s5, longitudinally stretching the cast sheet in the S4 to obtain a longitudinally stretched film;
and S6, transversely stretching the film in the S5, then performing heat setting, and cooling to obtain the high-heat-dissipation transparent anti-UV polyester film for the back plate.
The invention has the beneficial effects that: the graphene material is added into the polyester film, so that the heat conductivity of the polyester film is effectively improved, namely the heat dissipation effect is improved; in recent years, graphene is widely concerned by people due to the ultrahigh thermal conductivity, the thermal conductivity of graphene is 4840-5300W/(m.K), the thermal conductivity of graphene is better than that of carbon nanotubes, the stability of graphene is still good at high temperature, and the graphene has the advantages of ultrahigh carrier mobility, high strength, high specific surface area and the like, so that the service life and the power generation performance of the back plate are improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a flow chart of the preparation of the present invention;
in the drawings: 1. a back plate; 2. a polyester film; 3. a battery piece; 4. and (3) glass.
Detailed Description
The invention is further described in the following with reference to fig. 1 to 2 in a specific embodiment:
example 1:
this embodiment provides a transparent anti UV polyester film of high heat dissipation for backplate, characterized by includes:
a transparent back sheet 1;
the anti-UV coating comprises a polyester film 2, wherein the polyester film comprises 90% of polyethylene terephthalate, 6% of graphene materials and 4% of anti-UV materials, the graphene materials comprise graphene master batches, and the graphene content of the graphene master batches is 3%;
wherein the heat conductivity coefficient of the high-heat-dissipation transparent UV-resistant polyester film is 0.6w/(m × k); the transmittance of the high-heat-dissipation transparent anti-UV polyester film at the ultraviolet 380nm is less than 10%; after the high-heat-dissipation transparent UV-resistant polyester film is irradiated for 200kwh, the yellowing is less than or equal to 3; after the high-heat-dissipation transparent UV-resistant polyester film pct is tested for 48 hours, the breaking elongation retention rate is more than or equal to 40%.
According to the embodiment, the graphene material is added into the polyester film, so that the thermal conductivity of the polyester film is effectively improved, namely, the heat dissipation effect is improved; the high-temperature-resistant transparent back plate has the advantages of good stability at high temperature, ultrahigh carrier mobility, high strength, high specific surface area and the like, the service life and the power generation performance of the transparent back plate 1 are improved, and meanwhile, the transparent back plate 1 is adopted to replace a glass (AIR) layer, so that the weight and the overall thickness are reduced, and the installation is convenient.
Example 2:
this embodiment provides a transparent anti UV polyester film of high heat dissipation for backplate, characterized by includes:
a transparent back sheet 1;
the anti-UV coating comprises a polyester film 2, wherein the polyester film 2 comprises 80% of polyethylene terephthalate, 16% of graphene materials and 4% of anti-UV materials, the graphene materials comprise graphene master batches, and the graphene content of the graphene master batches is 3%;
wherein the heat conductivity coefficient of the high-heat-dissipation transparent UV-resistant polyester film is 1.1w/(m × k); the transmittance of the high-heat-dissipation transparent anti-UV polyester film at the ultraviolet 380nm is less than 10%; after the high-heat-dissipation transparent UV-resistant polyester film is irradiated for 200kwh, the yellowing is less than or equal to 3; after the high-heat-dissipation transparent UV-resistant polyester film pct is tested for 48 hours, the breaking elongation retention rate is more than or equal to 40 percent;
in the embodiment, the heat-conducting property of the material is improved by increasing the proportion of the graphene material in the polyester film, but the transparency of the film is reduced along with the increase of the proportion of the graphene.
Example 3:
in this embodiment, in addition to the technical features of embodiment 1, further, the graphene masterbatch includes:
graphene;
a dispersant;
an antioxidant;
and (4) PET slicing.
According to the embodiment, through making graphene into the graphene master batch, the even addition graphene of being convenient for on the one hand improves the misce bene effect between graphene and polyethylene terephthalate and the anti UV material to and mixing efficiency, and on the other hand can effectually act as the effect of grinding the pearl at the in-process graphene master batch of mixing, further improves the homogeneity and the mixing efficiency of mixing.
Example 4:
in this embodiment, in addition to the structural features of embodiment 1, further, the UV-resistant material includes:
an ultraviolet absorber;
a light stabilizer;
wherein the ultraviolet absorbent comprises one or more of salicylic acid esters, benzophenones, benzotriazoles, benzoates and other organic compounds; the light stabilizer comprises one or more of light stabilizer NBC, light stabilizer 770, light stabilizer 2002, light stabilizer 1084 and the like.
According to the embodiment, the ultraviolet resistance of the polyester film is effectively improved by adding the ultraviolet absorbent, the good ultraviolet resistance of the polyester film is improved by the anti-UV material, the damage risk can be reduced by using the polyester film in a specific environment, and the transparent back plate 1 is enabled to well separate ultraviolet rays, so that the battery and the packaging material are protected.
Example 5:
the embodiment provides a preparation method of a high-heat-dissipation transparent anti-UV polyester film applied to a back plate, which comprises the following steps:
s1, preparing graphene master batches, adding a dispersing agent and an antioxidant into the graphene and PET slices in an environment of 260-280 ℃, and extruding after melting to obtain the graphene master batches;
s2, uniformly mixing the polyethylene terephthalate, the UV resistant material and the graphene master batch prepared in the S1 according to the using amount, and pre-crystallizing in a pre-crystallizer to obtain a product, wherein the pre-crystallizing temperature is 150-160 ℃;
s3, drying the product in the S2 in a drying tower at the temperature of 170 ℃ and 180 ℃ to obtain a dried mixture;
s4, heating the mixture in the S3 to 260-280 ℃ in an extruder to obtain a molten mixture, extruding the molten mixture, and quenching the extruded molten mixture on a quenching drum to form a cast sheet;
s5, longitudinally stretching the cast sheet in the S4 to obtain a longitudinally stretched film;
and S6, transversely stretching the film in the S5, then performing heat setting, and cooling to obtain the high-heat-dissipation transparent anti-UV polyester film for the back plate.
In the embodiment, the preparation of the high-heat-dissipation transparent anti-UV polyester film is completed through the steps, the forming effect is good, and the stability of the high-heat-dissipation transparent anti-UV polyester film is improved.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a transparent anti UV polyester film of high heat dissipation for backplate which characterized by includes:
a transparent back sheet (1);
the anti-UV film comprises a polyester film (2), wherein the polyester film comprises 75-90% of polyethylene terephthalate, 2-10% of graphene materials and 1-5% of anti-UV materials, the graphene materials comprise graphene master batches, and the graphene content of the graphene master batches is 1-5%.
2. The high-heat-dissipation transparent UV-resistant polyester film for the back plate as claimed in claim 1, wherein the graphene master batch comprises:
graphene;
a dispersant;
an antioxidant;
and (4) PET slicing.
3. The high heat dissipation transparent UV resistant polyester film for a back sheet as claimed in claim 1, wherein the UV resistant material comprises:
an ultraviolet absorber;
light stabilizers.
4. The high heat dissipation transparent UV resistant polyester film for back sheet as claimed in claim 3, wherein:
the ultraviolet absorbent comprises one or more of salicylic acid esters, benzophenones, benzotriazoles, benzoates and other organic compounds.
5. The high heat dissipation transparent UV resistant polyester film for back sheet as claimed in claim 3, wherein:
the light stabilizer comprises one or more of light stabilizer NBC, light stabilizer 770, light stabilizer 2002, light stabilizer 1084 and the like.
6. The high heat dissipation transparent UV resistant polyester film for back sheet as claimed in claim 1, wherein:
the heat conductivity coefficient of the high-heat-dissipation transparent anti-UV polyester film is not less than 0.4w/(m × k).
7. The high heat dissipation transparent UV resistant polyester film for back sheet as claimed in claim 1, wherein:
the transmittance of the high-heat-dissipation transparent anti-UV polyester film at the ultraviolet 380nm position is less than 10%.
8. The high heat dissipation transparent UV resistant polyester film for back sheet as claimed in claim 1, wherein:
after the high-heat-dissipation transparent UV-resistant polyester film is irradiated for 200kwh, the yellowing is less than or equal to 3.
9. The high heat dissipation transparent UV resistant polyester film for back sheet as claimed in claim 1, wherein:
after the high-heat-dissipation transparent UV-resistant polyester film pct is tested for 48 hours, the breaking elongation retention rate is more than or equal to 40%.
10. A method for preparing a high heat dissipation transparent UV resistant polyester film for use in the back sheet of any one of claims 1 to 9, comprising the steps of:
s1, preparing graphene master batches, adding a dispersing agent and an antioxidant into the graphene and PET slices in an environment of 260-280 ℃, and extruding after melting to obtain the graphene master batches;
s2, uniformly mixing the polyethylene terephthalate, the UV resistant material and the graphene master batch prepared in the S1 according to the using amount, and pre-crystallizing in a pre-crystallizer to obtain a product, wherein the pre-crystallizing temperature is 150-160 ℃;
s3, drying the product in the S2 in a drying tower at the temperature of 170 ℃ and 180 ℃ to obtain a dried mixture;
s4, heating the mixture in the S3 to 260-280 ℃ in an extruder to obtain a molten mixture, extruding the molten mixture, and quenching the extruded molten mixture on a quenching drum to form a cast sheet;
s5, longitudinally stretching the cast sheet in the S4 to obtain a longitudinally stretched film;
and S6, transversely stretching the film in the S5, then performing heat setting, and cooling to obtain the high-heat-dissipation transparent anti-UV polyester film for the back plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110781674.XA CN113462133A (en) | 2021-07-08 | 2021-07-08 | High-heat-dissipation transparent anti-UV polyester film for back plate and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110781674.XA CN113462133A (en) | 2021-07-08 | 2021-07-08 | High-heat-dissipation transparent anti-UV polyester film for back plate and preparation method thereof |
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| CN113462133A true CN113462133A (en) | 2021-10-01 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1850491A (en) * | 2006-04-26 | 2006-10-25 | 苏州市格朗斯塑胶制品有限公司 | PET sheet production process |
| CN107815073A (en) * | 2017-10-23 | 2018-03-20 | 南通强生光电科技有限公司 | Graphene PET composite material and its solar cell backboard of preparation |
| CN111136983A (en) * | 2018-11-05 | 2020-05-12 | 宁波长阳科技股份有限公司 | High-water-blocking and high-heat-dissipation solar cell backboard polyester film easy to bond |
| CN111690334A (en) * | 2020-06-17 | 2020-09-22 | 浙江南洋科技有限公司 | Transparent anti-UV polyester film for back plate and preparation method thereof |
-
2021
- 2021-07-08 CN CN202110781674.XA patent/CN113462133A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1850491A (en) * | 2006-04-26 | 2006-10-25 | 苏州市格朗斯塑胶制品有限公司 | PET sheet production process |
| CN107815073A (en) * | 2017-10-23 | 2018-03-20 | 南通强生光电科技有限公司 | Graphene PET composite material and its solar cell backboard of preparation |
| CN111136983A (en) * | 2018-11-05 | 2020-05-12 | 宁波长阳科技股份有限公司 | High-water-blocking and high-heat-dissipation solar cell backboard polyester film easy to bond |
| CN111690334A (en) * | 2020-06-17 | 2020-09-22 | 浙江南洋科技有限公司 | Transparent anti-UV polyester film for back plate and preparation method thereof |
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