CN112680125A - Preparation method of polyaryl fiber-polyester composite film - Google Patents
Preparation method of polyaryl fiber-polyester composite film Download PDFInfo
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- CN112680125A CN112680125A CN202011575569.2A CN202011575569A CN112680125A CN 112680125 A CN112680125 A CN 112680125A CN 202011575569 A CN202011575569 A CN 202011575569A CN 112680125 A CN112680125 A CN 112680125A
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Abstract
The invention discloses a preparation method of a polyaryl fiber-polyester composite film, which comprises the following steps: putting the polyethylene terephthalate film into absolute ethyl alcohol, performing ultrasonic treatment for 20-30min, taking out and drying to obtain a clean polyethylene terephthalate film, then spraying an o-chlorophenol liquid film on the surface of the polyethylene terephthalate, and standing to obtain a wet film polyethylene terephthalate; uniformly spraying dimethyl acetamide on the surface of the polyaramide film to form a stable liquid film, then spraying absolute ethyl alcohol on the surface of the wet film of the poly (ethylene terephthalate) and attaching the wet film of the polyaramide film, and drying at constant temperature to obtain a single-sided composite film of the polyaramide-poly (ethylene terephthalate); compounding a polyaramide film on the other side of the polyethylene glycol terephthalate according to the method to form a three-layer composite film of polyaramide-polyethylene glycol terephthalate-polyaramide, and then extruding at constant temperature to obtain the methyl-square-fiber polyarylate composite film.
Description
Technical Field
The invention belongs to the field of transformers, and particularly relates to a preparation method of a polyaryl fiber-polyester composite film.
Background
Dry-type transformers are widely used in local lighting, high-rise buildings, airports, wharf CNC machines and other places, and simply, dry-type transformers refer to transformers in which iron cores and windings are not immersed in insulating oil: the coil mainly comprises an iron core formed by silicon steel sheets and a coil poured by epoxy resin, an insulating cylinder is arranged between the high-voltage coil and the low-voltage coil to increase electrical insulation, the coil is supported and restrained by a cushion block, and fasteners lapped by parts of the coil all have anti-loosening performance. In the practical use process, a polyaryl fiber polyester composite film is generally adopted as an insulating layer in the iron core, and polyurethane is adopted as an adhesive for extrusion adhesion, so that a stable insulating material is formed. With the increase in the service time, the adhesiveness of the polyurethane decreases, resulting in a decrease in the service life of the insulating layer.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a preparation method of a polyaryl fiber-polyester composite film, which solves the problem that the performance of the adhesive is reduced along with the change of time, and utilizes absolute ethyl alcohol as a dissolution auxiliary agent to form interpenetration connection of polyaryl amide and polyethylene terephthalate under the physical action of extrusion without using an adhesive.
In order to achieve the technical purpose, the technical scheme of the invention is as follows:
a preparation method of a polyaryl fiber-polyester composite film comprises the following steps:
step 1, putting a polyethylene terephthalate film into absolute ethyl alcohol, performing ultrasonic treatment for 20-30min, taking out and drying to obtain a clean polyethylene terephthalate film, spraying an o-chlorophenol liquid film on the surface of the polyethylene terephthalate, and standing to obtain a wet film polyethylene terephthalate; the ultrasonic frequency of the ultrasonic is 40-80kHz, the temperature is 20-30 ℃, the drying temperature is 80-100 ℃, and the spray amount is 2-4mL/cm2Standing at 60-90 deg.C under 0.2-0.3 MPa;
step 2, uniformly spraying dimethyl acetamide on the surface of the polyaramide film to form a stable liquid film, then spraying absolute ethyl alcohol on the surface of the wet film polyethylene terephthalate, attaching the wet film of the polyaramide film with the absolute ethyl alcohol, and drying at constant temperature to obtain a single-sided composite film of the polyaramide-polyethylene terephthalate; the spraying amount of the dimethylacetamide on the polyaramide film is 1-3mL/min, and the spraying amount of the absolute ethyl alcohol is 2-5L/cm2The extrusion pressure of the joint is 0.12-0.14MPa, and the constant temperature drying temperature is 80-90 ℃;
step 3, compounding a polyaramide film on the other side surface of the polyethylene glycol terephthalate according to the method to form a three-layer composite film of polyaramide-polyethylene glycol terephthalate-polyaramide, and then extruding at constant temperature to obtain a methyl-square-fiber polyarylate composite film; the temperature of the constant-temperature extrusion is 175-180 ℃, and the extrusion pressure is 0.3-0.5 MPa.
From the above description, it can be seen that the present invention has the following advantages:
1. the invention solves the problem that the performance of the adhesive is reduced along with the change of time, uses absolute ethyl alcohol as a dissolution auxiliary agent, and forms the mutual permeation connection of the aromatic polyamide and the polyethylene glycol terephthalate by matching with the physical action of extrusion without using an adhesive.
2. The invention utilizes the dissolution characteristic of the solvent to form the looseness and roughness of the surface of the film, and forms a composite layer in extrusion, thereby increasing the bonding performance of the two, and simultaneously ensuring the stable performance of the whole by a mutual permeation composite mode.
Detailed Description
The present invention is described in detail with reference to examples, but the present invention is not limited to the claims.
Example 1
A preparation method of a polyaryl fiber-polyester composite film comprises the following steps:
step 1, putting a polyethylene terephthalate film into 1L of absolute ethyl alcohol, performing ultrasonic treatment for 20min, taking out and drying to obtain a clean polyethylene terephthalate film, spraying an o-chlorophenol liquid film on the surface of the polyethylene terephthalate, and standing to obtain a wet film polyethylene terephthalate; the ultrasonic frequency of the ultrasonic is 40kHz, the temperature is 20 ℃, the drying temperature is 80 ℃, and the spray amount is 2mL/cm2Standing at 60 deg.C under 0.2 MPa;
step 2, uniformly spraying dimethyl acetamide on the surface of the polyaramide film to form a stable liquid film, then spraying absolute ethyl alcohol on the surface of the wet film polyethylene terephthalate, attaching the wet film of the polyaramide film with the absolute ethyl alcohol, and drying at constant temperature to obtain a single-sided composite film of the polyaramide-polyethylene terephthalate; the spraying amount of the dimethylacetamide on the polyaramide film is 1mL/min, and the spraying amount of the absolute ethyl alcohol is 2L/cm2The extrusion pressure of the joint is 0.12MPa, and the constant-temperature drying temperature is 80 ℃;
step 3, compounding a polyaramide film on the other side surface of the polyethylene glycol terephthalate according to the method to form a three-layer composite film of polyaramide-polyethylene glycol terephthalate-polyaramide, and then extruding at constant temperature to obtain a methyl-square-fiber polyarylate composite film; the temperature of the constant temperature extrusion is 175 ℃, and the extrusion pressure is 0.3 MPa.
The thickness of the composite film prepared in this example is 0.17mm, wherein the thickness of the polyester film is 0.08mm, the thickness of the polyaramide film is 0.05mm, the longitudinal elongation is 12%, the breakdown voltage is 10kV, and the tensile strength is not less than 98N/10 mm.
Example 2
A preparation method of a polyaryl fiber-polyester composite film comprises the following steps:
step 1, putting a polyethylene terephthalate film into absolute ethyl alcohol, performing ultrasonic treatment for 20-30min, taking out and drying to obtain a clean polyethylene terephthalate film, spraying an o-chlorophenol liquid film on the surface of the polyethylene terephthalate, and standing to obtain a wet film polyethylene terephthalate; the ultrasonic frequency of the ultrasonic is 80kHz, the temperature is 30 ℃, the drying temperature is 100 ℃, and the spray amount is 4mL/cm2The standing temperature is 90 ℃, and the pressure is 0.3 MPa;
step 2, uniformly spraying dimethyl acetamide on the surface of the polyaramide film to form a stable liquid film, then spraying absolute ethyl alcohol on the surface of the wet film polyethylene terephthalate, attaching the wet film of the polyaramide film with the absolute ethyl alcohol, and drying at constant temperature to obtain a single-sided composite film of the polyaramide-polyethylene terephthalate; the spraying amount of the dimethylacetamide on the polyaramide film is 3mL/min, and the spraying amount of the absolute ethyl alcohol is 5L/cm2The extrusion pressure of the joint is 0.14MPa, and the constant-temperature drying temperature is 90 ℃;
step 3, compounding a polyaramide film on the other side surface of the polyethylene glycol terephthalate according to the method to form a three-layer composite film of polyaramide-polyethylene glycol terephthalate-polyaramide, and then extruding at constant temperature to obtain a methyl-square-fiber polyarylate composite film; the temperature of the constant temperature extrusion is 180 ℃, and the extrusion pressure is 0.5 MPa.
The thickness of the composite film prepared in this example is 0.48mm, wherein the thickness of the polyester film is 0.40mm, the thickness of the polyaramide film is 0.05mm, the longitudinal stretching rate is 24%, the breakdown voltage is 30kV, and the tensile strength is not less than 380N/10 mm.
Example 3
A preparation method of a polyaryl fiber-polyester composite film comprises the following steps:
step 1, putting a polyethylene terephthalate film into absolute ethyl alcohol, performing ultrasonic treatment for 25min, taking out and drying to obtain a clean polyethylene terephthalate film, spraying an o-chlorophenol liquid film on the surface of the polyethylene terephthalate, and standing to obtain a wet film polyethylene terephthalate; the ultrasonic frequency of the ultrasonic is 60kHz, the temperature is 25 ℃, the drying temperature is 90 ℃, and the spray amount is 3mL/cm2Standing at 70 deg.C under 0.2 MPa;
step 2, uniformly spraying dimethyl acetamide on the surface of the polyaramide film to form a stable liquid film, then spraying absolute ethyl alcohol on the surface of the wet film polyethylene terephthalate, attaching the wet film of the polyaramide film with the absolute ethyl alcohol, and drying at constant temperature to obtain a single-sided composite film of the polyaramide-polyethylene terephthalate; the spraying amount of the dimethylacetamide on the polyaramide film is 2mL/min, and the spraying amount of the absolute ethyl alcohol is 4L/cm2The extrusion pressure of the joint is 0.13MPa, and the constant-temperature drying temperature is 85 ℃;
step 3, compounding a polyaramide film on the other side surface of the polyethylene glycol terephthalate according to the method to form a three-layer composite film of polyaramide-polyethylene glycol terephthalate-polyaramide, and then extruding at constant temperature to obtain a methyl-square-fiber polyarylate composite film; the temperature of the constant temperature extrusion is 178 ℃, and the extrusion pressure is 0.4 MPa.
The thickness of the composite film prepared in this example is 0.90mm, wherein the thickness of the polyester film is 0.83mm, the thickness of the polyaramide film is 0.05mm, the longitudinal stretching rate is 54%, the breakdown voltage is 40kV, and the tensile strength is not less than 400N/10 mm.
In summary, the invention has the following advantages:
1. the invention solves the problem that the performance of the adhesive is reduced along with the change of time, uses absolute ethyl alcohol as a dissolution auxiliary agent, and forms the mutual permeation connection of the aromatic polyamide and the polyethylene glycol terephthalate by matching with the physical action of extrusion without using an adhesive.
2. The invention utilizes the dissolution characteristic of the solvent to form the looseness and roughness of the surface of the film, and forms a composite layer in extrusion, thereby increasing the bonding performance of the two, and simultaneously ensuring the stable performance of the whole by a mutual permeation composite mode.
It should be understood that the detailed description of the invention is merely illustrative of the invention and is not intended to limit the invention to the specific embodiments described. It will be appreciated by those skilled in the art that the present invention may be modified or substituted equally as well to achieve the same technical result; as long as the use requirements are met, the method is within the protection scope of the invention.
Claims (6)
1. A preparation method of a polyaryl fiber-polyester composite film is characterized by comprising the following steps: the method comprises the following steps:
step 1, putting a polyethylene terephthalate film into absolute ethyl alcohol, performing ultrasonic treatment for 20-30min, taking out and drying to obtain a clean polyethylene terephthalate film, spraying an o-chlorophenol liquid film on the surface of the polyethylene terephthalate, and standing to obtain a wet film polyethylene terephthalate;
step 2, uniformly spraying dimethyl acetamide on the surface of the polyaramide film to form a stable liquid film, then spraying absolute ethyl alcohol on the surface of the wet film polyethylene terephthalate, attaching the wet film of the polyaramide film with the absolute ethyl alcohol, and drying at constant temperature to obtain a single-sided composite film of the polyaramide-polyethylene terephthalate;
and 3, compounding the polyaramide film on the other side surface of the polyethylene glycol terephthalate according to the method to form a three-layer composite film of polyaramide-polyethylene glycol terephthalate-polyaramide, and then extruding at constant temperature to obtain the methyl-square-fiber polyarylate composite film.
2. The method for producing a polyaryl fiber-polyester composite film according to claim 1, characterized in that: the ultrasonic frequency of the ultrasonic wave in the step 1 is 40-80kHz, the temperature is 20-30 ℃, and the drying temperature is 80-100 ℃.
3. The method for producing a polyaryl fiber-polyester composite film according to claim 1, characterized in that: the spraying amount in the step 1 is 2-4mL/cm2The standing temperature is 60-90 ℃, and the pressure is 0.2-0.3 MPa.
4. The method for producing a polyaryl fiber-polyester composite film according to claim 1, characterized in that: the spraying amount of the dimethylacetamide in the step 2 on the polyaramide film is 1-3 mL/min.
5. The method for producing a polyaryl fiber-polyester composite film according to claim 1, characterized in that: the spraying amount of the absolute ethyl alcohol in the step 2 is 2-5L/cm2The extrusion pressure of the joint is 0.12-0.14MPa, and the temperature for constant temperature drying is 80-90 ℃.
6. The method for producing a polyaryl fiber-polyester composite film according to claim 1, characterized in that: the temperature of the constant temperature extrusion in the step 3 is 175-180 ℃, and the extrusion pressure is 0.3-0.5 MPa.
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Citations (8)
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| JPH0647260A (en) * | 1991-02-04 | 1994-02-22 | E I Du Pont De Nemours & Co | Production of thin composite film |
| JPH07299891A (en) * | 1994-05-06 | 1995-11-14 | Teijin Ltd | Aramid-polyester laminate, intermediate material thereof and its production |
| CN101274220A (en) * | 2007-12-24 | 2008-10-01 | 天津大学 | Method for preparing polyaniline and nano-fibre blend composite film |
| CN201725601U (en) * | 2010-07-21 | 2011-01-26 | 株洲市绝缘材料有限责任公司 | Composite forming piece of polyester film and aromatic polyamide paper |
| WO2014042593A1 (en) * | 2012-09-11 | 2014-03-20 | National University Of Singapore | Thin film composite membranes |
| CN106182538A (en) * | 2016-07-08 | 2016-12-07 | 安徽省光学膜材料工程研究院有限公司 | A kind of high intensity Triafol T laminated film production technology |
| CN107415347A (en) * | 2017-05-27 | 2017-12-01 | 苏州维艾普新材料股份有限公司 | A kind of MULTILAYER COMPOSITE membrane material of vacuum heat-insulating plate |
| WO2019244980A1 (en) * | 2018-06-20 | 2019-12-26 | 国立大学法人大阪大学 | Method for producing bonded multilayer body of polymer and adherend |
-
2020
- 2020-12-28 CN CN202011575569.2A patent/CN112680125B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0647260A (en) * | 1991-02-04 | 1994-02-22 | E I Du Pont De Nemours & Co | Production of thin composite film |
| JPH07299891A (en) * | 1994-05-06 | 1995-11-14 | Teijin Ltd | Aramid-polyester laminate, intermediate material thereof and its production |
| CN101274220A (en) * | 2007-12-24 | 2008-10-01 | 天津大学 | Method for preparing polyaniline and nano-fibre blend composite film |
| CN201725601U (en) * | 2010-07-21 | 2011-01-26 | 株洲市绝缘材料有限责任公司 | Composite forming piece of polyester film and aromatic polyamide paper |
| WO2014042593A1 (en) * | 2012-09-11 | 2014-03-20 | National University Of Singapore | Thin film composite membranes |
| CN106182538A (en) * | 2016-07-08 | 2016-12-07 | 安徽省光学膜材料工程研究院有限公司 | A kind of high intensity Triafol T laminated film production technology |
| CN107415347A (en) * | 2017-05-27 | 2017-12-01 | 苏州维艾普新材料股份有限公司 | A kind of MULTILAYER COMPOSITE membrane material of vacuum heat-insulating plate |
| WO2019244980A1 (en) * | 2018-06-20 | 2019-12-26 | 国立大学法人大阪大学 | Method for producing bonded multilayer body of polymer and adherend |
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