CN216550222U

CN216550222U - Electric-conductive and heat-conductive polyimide film

Info

Publication number: CN216550222U
Application number: CN202122650978.0U
Authority: CN
Inventors: 须文洁
Original assignee: Shanghai Danheng New Material Technology Co ltd
Current assignee: Shanghai Danheng New Material Technology Co ltd
Priority date: 2021-11-02
Filing date: 2021-11-02
Publication date: 2022-05-17
Anticipated expiration: 2031-11-02

Abstract

The utility model discloses an electric and heat conductive polyimide film, which relates to the technical field of films and aims to solve the problems of poor heat conductivity, narrow product application range, insufficient film strength and poor stability of the prior art, the technical scheme is that the electric and heat conductive polyimide film comprises a protective film, a heat conductive coating, a conductive layer and an adhesion layer which are arranged in an up-down symmetrical mode, the strength of the polyimide film is enhanced, a base material is placed in the middle of a polyimide film structure, so that the protection of the base material is enhanced, the stability of the film structure is improved, the electric conductivity of the polyimide film is improved by arranging the conductive layer of a graphene material, the electric conductivity of the film structure is enhanced, the heat conductive silicone grease is arranged as the heat conductive layer material, the electric and heat conductive polyimide film has excellent use stability, the heat conductivity of the film material is improved, and through square holes are arranged on the protective film and the heat conductive coating, the conductivity of the film material is enhanced.

Description

Electric-conductive and heat-conductive polyimide film

Technical Field

The utility model relates to the technical field of films, in particular to an electric and heat conductive polyimide film.

Background

After the polyamic acid solution is cast into a film and stretched, the polyimide film is imidized at high temperature, is yellow and transparent, has outstanding high temperature resistance, radiation resistance, chemical corrosion resistance and electrical insulation performance, can be used in air at 250-280 ℃ for a long time, is particularly suitable for being used as a flexible printed circuit board substrate and various high temperature resistant motor and electrical appliance insulation materials, has excellent thermal stability, chemical corrosion resistance and mechanical performance, is generally orange yellow, has the bending strength of graphite or glass fiber reinforced polyimide reaching 345MPa, the bending modulus reaching 20GPa, has small creep deformation of thermosetting polyimide, has higher tensile strength, has wider coverage of the use temperature range of polyimide, can be kept from minus one hundred degrees to two or three hundred degrees, has stable chemical properties, can prevent combustion without adding a flame retardant, and is resistant to chemical solvents such as hydrocarbons, and can be used for a long time Esters, ethers, alcohols and fluorochloroalkanes, which are also weak acid resistant but are not recommended for use in stronger alkaline and inorganic acid environments.

The existing polyimide film is usually an electric insulating material, and has poor thermal conductivity, narrow product application range, insufficient film strength and poor stability.

SUMMERY OF THE UTILITY MODEL

In view of the problems in the prior art, the utility model discloses an electric and heat conductive polyimide film, which adopts the technical scheme that the electric and heat conductive polyimide film comprises a heat conductive coating, a conductive layer, an adhesion layer and a base material layer, wherein the base material layer is used for supporting a film structure on two sides, the adhesion layer is arranged on two sides of the base material layer, the adhesion layer has viscosity and can be used for tightly connecting the base material layer and the conductive layer, the conductive layer is respectively arranged on the outer side of the adhesion layer and used for conducting electricity, and the heat conductive coating is respectively arranged on the outer side of the conductive layer and used for conducting heat.

As a preferable technical scheme of the utility model, the outer sides of the adhesion layers are respectively provided with a protective film to protect the film structure and improve the film strength.

As a preferable technical scheme of the utility model, the conducting layer is made of graphene materials by adopting a chemical vapor deposition method, and is beneficial to passing of current.

As a preferable technical solution of the present invention, an adhesive coating is disposed between the heat conductive coating and the conductive layer, so that the heat conductive coating and the conductive layer are tightly bonded.

As a preferable technical scheme of the utility model, the protective film and the heat-conducting coating are respectively provided with a through square hole, and the protective film corresponds to the square hole on the heat-conducting coating in position, so that the conducting layer is communicated with the outside, and the conductivity of the film material is enhanced.

In a preferred embodiment of the present invention, the thickness of the substrate layer is 25 to 100 μm.

As a preferred technical scheme of the utility model, the material of the heat-conducting coating 2 is heat-conducting silicone grease, and the thickness range of the heat-conducting coating is 0.08-0.15mm, which is beneficial to rapid heat conduction.

The utility model has the beneficial effects that: according to the utility model, the protective film, the heat-conducting coating, the conducting layer and the adhesion layer are arranged in a vertically symmetrical manner, so that the strength of the polyimide film is enhanced, the base material is placed in the middle of the polyimide film structure, the protection of the base material is enhanced, the stability of the film structure is improved, the conducting layer made of graphene materials is arranged, so that the conducting capacity of the polyimide film is greatly improved, the electric conductivity of the film structure is enhanced, the conducting layer made of heat-conducting silicone grease has high heat conductivity, excellent heat conductivity, wider use temperature, good use stability, lower consistency and good construction performance, the heat conductivity of the film material is improved, and the conducting layer is exposed to the outside and the electric conductivity of the film material is enhanced by arranging the protective film and the heat-conducting coating which are provided with the communicated square holes.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of a conductive layer, an adhesion layer, and a substrate layer according to the present invention;

FIG. 3 is a schematic top view of the present invention;

in the figure: 1-protective film, 2-heat conducting coating, 3-conducting layer, 4-adhesion layer, 5-base material layer and 6-square hole.

Detailed Description

Example 1

As shown in fig. 1 to 3, the present invention discloses an electrically and thermally conductive polyimide film, which adopts the technical scheme that the electrically and thermally conductive polyimide film comprises a thermally conductive coating 2, a conductive layer 3, an adhesion layer 4 and a substrate layer 5, wherein the substrate layer 5 is used for supporting a two-sided film structure, the adhesion layer 4 is arranged on two sides of the substrate layer 5, the adhesion layer 4 has viscosity, the substrate layer 5 and the conductive layer 3 can be tightly connected together, the outer side of the adhesion layer 4 is respectively provided with one layer of the conductive layer 3 for electrical conduction, and the outer side of the conductive layer 3 is also respectively provided with one layer of the thermally conductive coating 2 for thermal conduction.

As a preferable technical scheme of the utility model, the outer sides of the adhesion layers 4 are respectively provided with a protective film 1 to protect the film structure and improve the strength.

As a preferred technical scheme of the present invention, the conductive layer 3 is made of graphene material by using a chemical vapor deposition method, which is beneficial to free passage of charges.

As a preferred technical solution of the present invention, an adhesive coating is disposed between the heat conductive coating 2 and the conductive layer 3 to tightly bond the two.

As a preferable technical scheme of the present invention, the protective film 1 and the heat conductive coating 2 are both provided with through square holes 6, and the positions of the protective film 1 and the square holes 6 on the heat conductive coating 2 correspond to each other, so that the conductive layer is exposed to the outside, and the electrical conductivity of the film material is enhanced.

In a preferred embodiment of the present invention, the thickness of the substrate layer 5 is 25 to 100 μm.

As a preferred technical scheme of the utility model, the material of the heat-conducting coating 2 is heat-conducting silicone grease, and the thickness range of the heat-conducting coating 2 is 0.08-0.15mm, which is beneficial to rapid heat conduction and heat dissipation.

The working principle of the utility model is as follows: firstly, substrate layer 5 has played the effect of a bearing to whole body membrane material, the articulamentum 4 is on the both sides of substrate layer 5, it can combine substrate layer 5 and conducting layer 3 to make it become firm whole, conducting layer 3 is the graphite alkene material, it has excellent electric conductivity and is used for electrically conducting, the outside of graphite alkene conducting layer 3 still respectively is equipped with one deck heat conduction coating 2, heat conduction coating 2 that heat conduction silicone grease material made makes the membrane material have excellent heat conductivity, the bond coat that is equipped with between heat conduction coating 2 and the conducting layer 3 makes heat conduction coating 2 and conducting layer 3 link together firmly, the square hole 6 that link up that all establish on protective film 1 and the heat conduction coating 2 makes conducting layer 3 communicate with each other with the outside, make electrically conducting go on smoothly.

The mechanical connection according to the utility model is a conventional means used by those skilled in the art and can be suggested by limited trials and is common knowledge.

Components not described in detail herein are prior art.

Although the present invention has been described in detail with reference to the specific embodiments, the present invention is not limited to the above embodiments, and various changes and modifications without inventive changes may be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.

Claims

1. An electrically and thermally conductive polyimide film, comprising: including heat conduction coating (2), conducting layer (3), adhesion layer (4), substrate layer (5), establish adhesion layer (4) on the two sides of substrate layer (5), the outside of adhesion layer (4) respectively is equipped with the one deck conducting layer (3), the outside of conducting layer (3) still respectively is equipped with the one deck heat conduction coating (2).

2. An electrically and thermally conductive polyimide film according to claim 1, wherein: and the outer sides of the adhesion layers (4) are respectively provided with a protective film (1).

3. An electrically and thermally conductive polyimide film according to claim 1, wherein: the conducting layer (3) is made of graphene materials and is prepared by a chemical vapor deposition method.

4. An electrically and thermally conductive polyimide film according to claim 1, wherein: and an adhesive coating is arranged between the heat conduction coating (2) and the conductive layer (3).

5. An electrically and thermally conductive polyimide film according to claim 2, wherein: the protective film (1) and the heat conduction coating (2) are provided with square holes (6) which are communicated with each other, and the positions of the protective film (1) and the square holes (6) on the heat conduction coating (2) correspond to each other.

6. An electrically and thermally conductive polyimide film according to claim 1, wherein: the thickness of the substrate layer (5) is 25-100 mu m.

7. An electrically and thermally conductive polyimide film according to claim 1, wherein: the heat-conducting coating (2) is made of heat-conducting silicone grease, and the thickness range of the heat-conducting coating (2) is 0.08-0.15 mm.