CN114163943A - Polyimide film and preparation method thereof - Google Patents
Polyimide film and preparation method thereof Download PDFInfo
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- CN114163943A CN114163943A CN202111615948.4A CN202111615948A CN114163943A CN 114163943 A CN114163943 A CN 114163943A CN 202111615948 A CN202111615948 A CN 202111615948A CN 114163943 A CN114163943 A CN 114163943A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/29—Laminated material
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J179/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09J161/00 - C09J177/00
- C09J179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C09J179/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
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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
- C08K3/28—Nitrogen-containing compounds
- C08K2003/282—Binary compounds of nitrogen with aluminium
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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
- C08K3/38—Boron-containing compounds
- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/302—Applications of adhesives in processes or use of adhesives in the form of films or foils for bundling cables
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
- C09J2301/124—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/16—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Laminated Bodies (AREA)
Abstract
The invention belongs to the field of organic materials, and particularly relates to a polyimide film and a preparation method thereof, wherein the polyimide film comprises a film body, a first polyimide resin layer, a second polyimide resin layer, a breathable layer, an insulating layer, a sponge filling layer and a wear-resistant layer; the film body consists of a first polyimide resin layer, a second polyimide resin layer, a breathable layer, an insulating layer and a sponge filling layer, wherein round holes are uniformly formed in the surface of the breathable layer, rubber strips are uniformly glued between the breathable layer and the insulating layer, and the inner side of the first polyimide resin layer is glued with the insulating layer; can increase film body gas permeability through ventilative layer, can further improve the flame retardant efficiency of film body with the help of the insulating layer to through the rubber strip that sets up between ventilative layer and the insulating layer, can strengthen the toughness of film body, thereby avoid the film body fold to appear when being convoluteed by the winder, improved film body result of use.
Description
Technical Field
The invention relates to the field of organic materials, in particular to a polyimide film and a preparation method thereof.
Background
The current polyimide films are classified into a pyromellitic polyimide film and a biphenyl polyimide film.
The polyimide film can be used as a groove insulation and cable wrapping material of a motor, and the polyimide film needs to be wound and packaged through a winding machine after being produced.
Since the film is thin, wrinkles may occur when the film is wound and packed, and thus, a polyimide film and a method for preparing the same have been proposed to solve the above problems.
Disclosure of Invention
In order to make up for the defects of the prior art and solve the problem that wrinkles may occur during winding and packaging due to the thin film, the invention provides a polyimide film and a preparation method thereof.
The technical scheme adopted by the invention for solving the technical problems is as follows: the polyimide film comprises a film body, a first polyimide resin layer, a second polyimide resin layer, a breathable layer, an insulating layer, a sponge filling layer and a wear-resistant layer; the film body comprises a first polyimide resin layer, a second polyimide resin layer, a breathable layer, an insulating layer and a sponge filling layer, round holes are uniformly formed in the surface of the breathable layer, rubber strips are uniformly glued between the breathable layer and the insulating layer, the inner side of the first polyimide resin layer is glued with the insulating layer, the inner side of the second polyimide resin layer is glued with the breathable layer, a flame retardant is added to the insulating layer, the breathability of the film body can be increased through the breathable layer, the flame retardant effect of the film body can be further improved through the insulating layer, and the toughness of the film body can be enhanced through the rubber strips arranged between the breathable layer and the insulating layer, so that wrinkles of the film body when the film body is wound by a winding machine are avoided.
Preferably, the wear-resistant layer is evenly bonded to the two sides of the first polyimide resin layer and the second polyimide resin layer, so that the two sides of the film body can be prevented from being easily worn through the wear-resistant layer.
Preferably, the top end and the bottom end of the rubber strip are uniformly and fixedly connected with bonding surfaces, the top end and the bottom end of the rubber strip are bonded with the insulating layer and the breathable layer, and the bonding effect of the rubber strip, the first polyimide resin layer and the second polyimide resin layer can be enhanced through the bonding surfaces.
Preferably, a sponge filling layer is filled between the insulating layer and the breathable layer, the pores of the sponge filling layer are 60pp pores, the strength of the film body can be enhanced by filling the sponge filling layer between the insulating layer and the breathable layer, and the 60pp pores can increase the breathable effect of the sponge.
Preferably, the wear-resistant layer is made of silicon carbide, and the wear-resistant effect of the wear-resistant layer can be improved by selecting the silicon carbide as the wear-resistant layer.
A polyimide film preparation method, the preparation method includes the following steps;
s1: selecting polyimide resin as raw material, and selecting aluminium nitride and boron nitride as heat-conducting auxiliary material
S2: melting the polyimide resin into liquid, pouring the liquid into a reaction kettle, and then adding boron nitride and aluminum nitride into the reaction kettle to enable the polyimide resin liquid to react and mix with the boron nitride and the aluminum nitride;
s3: producing the mixed raw materials into a polyimide film by an injection molding machine;
s4: and winding and packaging the polyimide film produced by the method by using a winding machine.
Preferably, the polyimide resin selected in S1 and the heat conductive auxiliary material of aluminum nitride and boron nitride need to be sterilized at high temperature before use.
Preferably, the reaction kettle in the S2 is operated, so that the temperature of the reaction kettle is kept constant at 350-400 ℃.
Preferably, the injection molding machine in S3 is hot-press injection molding, and the temperature of the raw material is maintained at 260 to 300 degrees celsius during hot-press molding.
Preferably, the winder in S4 is a double-head winder, and can wind and pack two polyimide films at the same time.
The invention has the advantages that:
1. can increase film body gas permeability through ventilative layer, can further improve the flame retardant efficiency of film body with the help of the insulating layer to through the rubber strip that sets up between ventilative layer and the insulating layer, can strengthen the toughness of film body, thereby avoid the film body fold to appear when being convoluteed by the winder, improved film body result of use.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic cross-sectional view of a first polyimide resin layer;
FIG. 2 is a schematic view of the structure of the breathable layer;
FIG. 3 is a schematic perspective view of a film body;
FIG. 4 is a flow chart of a method for preparing a polyimide film.
In the figure: 1. a film body; 2. a first polyimide gum layer; 3. a second polyimide gum layer; 4. a breathable layer; 5. an insulating layer; 6. a sponge filling layer; 7. a wear layer; 8. an adhesive surface; 9. a rubber strip.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1-4, a polyimide film and a method for preparing the same includes a film body 1, a first polyimide resin layer 2, a second polyimide resin layer 3, a gas permeable layer 4, an insulating layer 5, a sponge filling layer 6, and an abrasion resistant layer 7; the film body 1 is composed of a first polyimide resin layer 2, a second polyimide resin layer 3, a breathable layer 4, an insulating layer 5 and a sponge filling layer 6, round holes are uniformly formed in the surface of the breathable layer 4, rubber strips 9 are uniformly glued between the breathable layer 4 and the insulating layer 5, the inner side of the first polyimide resin layer 2 is glued with the insulating layer 5, the inner side of the second polyimide resin layer 3 is glued with the breathable layer 4, a flame retardant is added into the insulating layer 5, the air permeability of the film body 1 can be increased through the breathable layer 4, the flame retardant effect of the film body 1 can be further improved through the insulating layer 5, and the toughness of the film body 1 can be enhanced through the rubber strips 9 arranged between the breathable layer 4 and the insulating layer 5, so that wrinkles of the film body 1 when the film body 1 is wound by a winding machine are avoided.
As a specific embodiment of the present invention, the wear-resistant layer 7 is uniformly adhered to both sides of the first polyimide resin layer 2 and the second polyimide resin layer 3, and the wear-resistant layer 7 can prevent both sides of the film body 1 from being easily worn.
In a specific embodiment of the present invention, the top end and the bottom end of the rubber strip 9 are uniformly and fixedly connected with the adhesive surface 8, the top end and the bottom end of the rubber strip 9 are bonded with the insulating layer 5 and the air permeable layer 4, and the bonding effect of the rubber strip 9 with the first polyimide resin layer 2 and the second polyimide resin layer 3 can be enhanced by the adhesive surface 8.
As a specific embodiment of the present invention, a sponge filling layer 6 is filled between the insulating layer 5 and the air permeable layer 4, the pores of the sponge filling layer 6 are 60pp pores, the strength of the film body 1 can be enhanced by filling the sponge filling layer 6 between the insulating layer 5 and the air permeable layer 4, and the 60pp pores can increase the air permeable effect of the sponge.
As a specific embodiment of the present invention, the wear-resistant layer 7 is made of silicon carbide, and by selecting silicon carbide as the wear-resistant layer 7, the wear-resistant effect of the wear-resistant layer 7 can be increased.
A polyimide film preparation method, the preparation method includes the following steps;
s1: selecting polyimide resin as raw material, and selecting aluminium nitride and boron nitride as heat-conducting auxiliary material
S2: melting the polyimide resin into liquid, pouring the liquid into a reaction kettle, and then adding boron nitride and aluminum nitride into the reaction kettle to enable the polyimide resin liquid to react and mix with the boron nitride and the aluminum nitride;
s3: producing the mixed raw materials into a polyimide film by an injection molding machine;
s4: and winding and packaging the polyimide film produced by the method by using a winding machine.
In a specific embodiment of the present invention, the polyimide resin selected in S1 and the thermal conductive auxiliary material of aluminum nitride and boron nitride need to be sterilized at a high temperature before use.
In an embodiment of the present invention, the temperature of the reaction kettle in S2 is kept constant at 350 to 400 ℃.
In an embodiment of the present invention, the injection molding machine in S3 is a hot-press injection molding machine, and the temperature of the raw material is maintained at 260 to 300 degrees celsius during the hot-press.
In an embodiment of the present invention, the winder in S4 is a double-head winder, and two polyimide films can be wound and packaged at the same time.
The theory of operation, can increase film body gas permeability through ventilative layer, can further improve the flame retardant efficiency of film body with the help of the insulating layer, and through the rubber strip that sets up between ventilative layer and the insulating layer, can strengthen the toughness of film body, thereby avoid the film body fold to appear when being convoluteed by the winder, can avoid film body both sides to appear wearing and tearing easily through the wearing layer, can strengthen the cementation effect of rubber strip and first polyimide resin layer and second polyimide resin layer through the adhesive surface, can strengthen the intensity of film body through filling the sponge filling layer between insulating layer and ventilative layer, and the ventilation effect of sponge can be increased in the 60pp hole.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (10)
1. A polyimide film characterized by: the polyimide film comprises a film body (1), a first polyimide resin layer (2), a second polyimide resin layer (3), a breathable layer (4), an insulating layer (5) and a sponge filling layer (6); the film body (1) comprises a first polyimide resin layer (2), a second polyimide resin layer (3), a breathable layer (4), an insulating layer (5) and a sponge filling layer (6), round holes are uniformly formed in the surface of the breathable layer (4), rubber strips (9) are uniformly glued between the breathable layer (4) and the insulating layer (5), the inner side of the first polyimide resin layer (2) is glued with the insulating layer (5), and the inner side of the second polyimide resin layer (3) is glued with the breathable layer (4).
2. The polyimide film according to claim 1, wherein: and wear-resistant layers (7) are uniformly bonded on two sides of the first polyimide resin layer (2) and the second polyimide resin layer (3).
3. The polyimide film according to claim 2, wherein: the top end and the bottom end of the rubber strip (9) are uniformly and fixedly connected with bonding surfaces (8), and the top end and the bottom end bonding surfaces (8) of the rubber strip (9) are bonded with the insulating layer (5) and the breathable layer (4).
4. A polyimide film according to claim 3, wherein: a sponge filling layer (6) is filled between the insulating layer (5) and the breathable layer (4), and the pores of the sponge filling layer (6) are 60pp pores.
5. The polyimide film according to claim 4, wherein: the wear-resistant layer (7) is made of silicon carbide.
6. A method for producing a polyimide film, which is used for producing a polyimide film according to any one of claims 1 to 5, and which comprises the steps of;
s1: selecting polyimide resin as a raw material, and selecting aluminum nitride and boron nitride as heat-conducting auxiliary materials;
s2: melting the polyimide resin into liquid, pouring the liquid into a reaction kettle, and then adding boron nitride and aluminum nitride into the reaction kettle to enable the polyimide resin liquid to react and mix with the boron nitride and the aluminum nitride;
s3: producing the mixed raw materials into a polyimide film by an injection molding machine;
s4: and winding and packaging the polyimide film produced by the method by using a winding machine.
7. The method for preparing a polyimide film according to claim 6, wherein: the polyimide resin selected in the step S1 and the heat conduction auxiliary materials of aluminum nitride and boron nitride need to be sterilized at high temperature and then used.
8. The method for preparing a polyimide film according to claim 7, wherein: and when the reaction kettle in the S2 works, the temperature of the reaction kettle is kept constant at 350-400 ℃.
9. The method for preparing a polyimide film according to claim 8, wherein: the injection molding machine in S3 is hot-press injection molding, and the temperature of the raw material is maintained at 260 to 300 degrees celsius during hot-press.
10. The method for preparing a polyimide film according to claim 9, wherein: the winding machine in the step S4 is a double-head winding machine, and can simultaneously wind and pack two polyimide films.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111615948.4A CN114163943B (en) | 2021-12-27 | 2021-12-27 | Polyimide film and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111615948.4A CN114163943B (en) | 2021-12-27 | 2021-12-27 | Polyimide film and preparation method thereof |
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| CN114163943A true CN114163943A (en) | 2022-03-11 |
| CN114163943B CN114163943B (en) | 2023-06-02 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110165410A1 (en) * | 2008-09-08 | 2011-07-07 | Eijiro Aoyagi | Highly heat conductive polyimide film, highly heat conductive metal-clad laminate, and method for producing the same |
| CN107096317A (en) * | 2017-06-28 | 2017-08-29 | 江苏鼎盛滤袋有限公司 | A kind of filter bag with sealing function |
| CN207736899U (en) * | 2017-11-30 | 2018-08-17 | 东莞市致腾塑胶制品有限公司 | Breathable films based on aromatic polyimide polymer |
| CN110626030A (en) * | 2019-09-25 | 2019-12-31 | 桂林电子科技大学 | High-thermal-conductivity polyimide multilayer composite film and preparation method thereof |
-
2021
- 2021-12-27 CN CN202111615948.4A patent/CN114163943B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110165410A1 (en) * | 2008-09-08 | 2011-07-07 | Eijiro Aoyagi | Highly heat conductive polyimide film, highly heat conductive metal-clad laminate, and method for producing the same |
| CN107096317A (en) * | 2017-06-28 | 2017-08-29 | 江苏鼎盛滤袋有限公司 | A kind of filter bag with sealing function |
| CN207736899U (en) * | 2017-11-30 | 2018-08-17 | 东莞市致腾塑胶制品有限公司 | Breathable films based on aromatic polyimide polymer |
| CN110626030A (en) * | 2019-09-25 | 2019-12-31 | 桂林电子科技大学 | High-thermal-conductivity polyimide multilayer composite film and preparation method thereof |
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