CN214796952U

CN214796952U - High-strength insulating sheet

Info

Publication number: CN214796952U
Application number: CN202121200332.6U
Authority: CN
Inventors: 王琪; 赵登攀
Original assignee: Beijing Xinxin Shunyuan Technology Development Co ltd
Current assignee: Beijing Xinxin Shunyuan Technology Development Co ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2021-11-19
Anticipated expiration: 2031-05-31

Abstract

The utility model relates to a high-strength insulating sheet, which comprises an aluminum foil glass fiber cloth composite layer, a polyimide layer and a heat-conducting silica gel layer, wherein the aluminum foil glass fiber cloth composite layer comprises aluminum foil glass fiber cloth which comprises an aluminum foil layer and a glass fiber cloth layer, and a whitening area is arranged between the side edge of the aluminum foil layer and the side edge of the glass fiber cloth layer; the surface of the glass fiber cloth layer is coated with an aluminized net layer, the aluminized net layer comprises a plurality of first aluminized areas arranged in a matrix shape, a second aluminized area is arranged between every two adjacent first aluminized areas, and the second aluminized areas are connected with the first aluminized areas into a whole; the heat-conducting silica gel layer completely covers the aluminized net layer and is connected with the aluminum foil glass fiber cloth composite layer into a whole. The high-strength insulating sheet has good insulativity, high mechanical strength and excellent heat dissipation performance, and can meet the requirements of good heat conduction effect and harsh installation requirements.

Description

High-strength insulating sheet

Technical Field

The utility model relates to a high strength insulating piece belongs to insulating piece technical field.

Background

The insulating sheet is widely used in the electric appliance and electronic industry, and the product plays roles of insulation, separation and the like.

The conventional insulating sheet is generally made of an insulating material, such as a PI insulating sheet, a PET insulating sheet, a PP insulating sheet, a PC insulating sheet, a PVC insulating sheet, and the like. However, in the electrical and electronic industries, a common insulating sheet needs to have a certain heat conductivity in consideration of heat dissipation, and the insulating sheet made of the insulating material has low heat dissipation performance and cannot meet the use requirements.

Existing insulating sheets having both thermal conductivity properties, relatively thin electrically insulating sheets typically made of silicone rubber, for example, US patent 4602678 describes a thermally conductive insulating gasket whose base structure comprises two layers of thermally conductive silicone rubber and an insulating layer located between the two layers of thermally conductive silicone rubber. The insulating sheet with heat conductivity in the market at present, compound heat conduction silica gel layer in the surface of traditional insulating sheet in addition.

The above-mentioned insulating sheet having thermal conductivity has a limited mechanical strength and a limited tensile strength and breaking strength, and thus it is difficult to satisfy the severe installation requirements.

SUMMERY OF THE UTILITY MODEL

The utility model discloses not enough to prior art exists provides a high strength insulating piece, and concrete technical scheme is as follows:

a high-strength insulating sheet comprises an aluminum foil glass fiber cloth composite layer, a polyimide layer and a heat-conducting silica gel layer, wherein the aluminum foil glass fiber cloth composite layer comprises aluminum foil glass fiber cloth, the aluminum foil glass fiber cloth comprises an aluminum foil layer and a glass fiber cloth layer, and a white area is arranged between the side edge of the aluminum foil layer and the side edge of the glass fiber cloth layer; the polyimide layer completely covers the aluminum foil layer and is connected with the aluminum foil glass fiber cloth into a whole, the surface of the glass fiber cloth layer is coated with an aluminized net layer, the aluminized net layer comprises a plurality of first aluminized areas which are arranged in a matrix shape, a second aluminized area is arranged between every two adjacent first aluminized areas, and the second aluminized areas are connected with the first aluminized areas into a whole; the heat-conducting silica gel layer completely covers the aluminized net layer and is connected with the aluminum foil glass fiber cloth composite layer into a whole.

As an improvement of the above technical solution, the first aluminum plating region has a shape of one of a regular hexagon, a square, a diamond, a regular triangle, and a circle.

As an improvement of the above technical solution, the second aluminum plating region has a strip-shaped structure.

As an improvement of the technical scheme, a wavy or zigzag protruding structure is arranged on the side edge of the aluminum foil layer.

As an improvement of the above technical solution, the surface of the aluminum foil glass fiber cloth is provided with needle-punched holes in one-to-one correspondence with the first aluminum plating area, and projections of the needle-punched holes in the first aluminum plating area are located in a central area of the first aluminum plating area.

High strength insulating piece's insulating nature is good, and mechanical strength is high, still has good heat dispersion, can satisfy in the harsh occasion of needs good heat conduction effect and installation requirement.

Drawings

Fig. 1 is a schematic structural view of the high-strength insulating sheet of the present invention;

fig. 2 is a schematic structural diagram of the aluminum foil glass fiber cloth composite layer of the present invention;

fig. 3 is a schematic view of the surface of the aluminum foil layer in the aluminum foil glass fiber cloth composite layer according to the present invention;

fig. 4 is a schematic view of the connection between the aluminum plated mesh layer and the aluminum foil glass fiber cloth according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in fig. 1-4, the high-strength insulating sheet includes an aluminum foil-glass fiber cloth composite layer 10, a polyimide layer 20, and a heat-conducting silica gel layer 30, where the aluminum foil-glass fiber cloth composite layer 10 includes an aluminum foil-glass fiber cloth, the aluminum foil-glass fiber cloth includes an aluminum foil layer 12 and a glass fiber cloth layer 11, and a white region 13 is disposed between a side edge of the aluminum foil layer 12 and a side edge of the glass fiber cloth layer 11; the polyimide layer 20 completely covers the aluminum foil layer 12, the polyimide layer 20 is connected with the aluminum foil glass fiber cloth into a whole, the surface of the glass fiber cloth layer 11 is coated with an aluminum-plated net layer, the aluminum-plated net layer comprises a plurality of first aluminum-plated areas 51 which are arranged in a matrix shape, a second aluminum-plated area 52 is arranged between every two adjacent first aluminum-plated areas 51, and the second aluminum-plated areas 52 are connected with the first aluminum-plated areas 51 into a whole; the heat-conducting silica gel layer 30 completely covers the aluminum-plated mesh layer, and the heat-conducting silica gel layer 30 is connected with the aluminum foil and glass fiber cloth composite layer 10 into a whole.

In the present embodiment, the polyimide layer 20 has better mechanical strength and better insulation performance than the thermal conductive silicone layer 30. But the thermal conductivity of the polyimide layer 20 is very poor. The aluminum foil glass fiber cloth, namely the aluminum foil composite glass fiber cloth, is prepared by compounding an aluminum foil and glass fiber cloth (glass fiber cloth), wherein the glass fiber cloth can be 1080 type electronic grade glass fiber cloth, for example 1080 type aluminum foil composite glass fiber cloth of Shandong Zhongyixin engineering materials Co., Ltd. The aluminum foil composite glass fiber cloth is used as a base material, and an etching process in the PCB field is adopted to manufacture the blank area 13.

The aluminum foil glass fiber cloth composite layer 10, the polyimide layer 20 and the heat-conducting silicon adhesive layer 30 are compounded by hot pressing, so that the aluminum foil glass fiber cloth composite layer, the polyimide layer and the heat-conducting silicon adhesive layer are connected into a whole. The provision of the margin region 13 allows the aluminum foil layer 12 to be completely covered with the polyimide layer 20, thereby further improving the insulation. The aluminum foil glass fiber cloth can obviously improve the mechanical strength of the insulating sheet, including tensile strength, breaking strength and the like; the aluminum foil glass fiber cloth is higher in mechanical strength than the glass fiber cloth alone due to the fact that the aluminum foil layer 12 is compounded. Meanwhile, the existence of the aluminum foil layer 12 can also improve the heat conduction performance. The first aluminum-plated area 51 and the second aluminum-plated area 52 are arranged, so that on one hand, the surface roughness and the surface area of the aluminum foil and glass fiber cloth composite layer 10 can be improved, and the bonding strength between the aluminum foil and glass fiber cloth composite layer and the heat-conducting silica gel layer 30 is improved; meanwhile, the heat conduction performance can be further improved. The first aluminum-plated region 51 and the second aluminum-plated region 52 are preferably formed by a vacuum plating process.

Example 2

Based on embodiment 1, the shape of the first aluminum-plated region 51 is one of a regular hexagon, a square, a diamond, a regular triangle, and a circle. Among them, most preferably, the first aluminum-plated region 51 has a regular hexagonal shape, as shown in fig. 4. Compared with a circular shape, the first aluminum-plated area 51 has a regular hexagonal structure, and the most pointed structures of the first aluminum-plated area are beneficial to heat dissipation at the pointed ends, so that heat in the middle area of the insulating sheet can be promoted to be dissipated all around; and compared with other special-shaped structures, the processing difficulty is relatively low. As for square, rhombus, regular triangle, regular hexagon structure can more rationally utilize the area.

Example 3

Based on the embodiment 1, the processing difficulty is considered; the second aluminum-plated region 52 has an elongated structure.

Example 4

Based on example 1, the side of the aluminum foil layer 12 is provided with a wave-shaped or saw-toothed protruding structure 15. In consideration of the processing difficulty, a wavy structure is preferable, but the wavy shape is not sharp enough. The saw-tooth structure is preferable in view of heat dissipation effect because the saw-tooth structure is sharper than the wave-like structure.

Example 5

Based on example 1, in order to further improve the bonding strength; the surface of the aluminum foil glass fiber cloth is provided with needle-punched holes 14 which are in one-to-one correspondence with the first aluminum-plated area 51, and the projection of the needle-punched holes 14 in the first aluminum-plated area 51 is located in the central area of the first aluminum-plated area 51.

When the high-strength insulating sheet is manufactured, firstly needling is carried out on aluminum foil glass fiber cloth to manufacture needling holes 14 with the aperture of 2-5 mm; then the aluminum foil fiberglass cloth is compounded with the polyimide layer 20. Then, the first aluminum-plated area 51 and the second aluminum-plated area 52 are formed by a vacuum plating process, so that the first aluminum-plated area 51 can penetrate through the needle-punched holes 14 to be bonded with the aluminum foil layer 12 and the polyimide layer 20, and the bonding strength is remarkably improved.

Example 6

Based on the embodiment 1, the ratio of the area of the second aluminum-plated region 52 to the area of the first aluminum-plated region 51 is a, and a is greater than or equal to 0.1 and less than or equal to 0.5. The first aluminum plating area 51 cannot be too large, otherwise the porosity of the aluminum plating mesh layer is small, which is not beneficial to improving the bonding strength; the first aluminized region 51 cannot be too small, otherwise the thermal conductivity cannot be maximized.

In the above embodiment, the high-strength insulating sheet has good insulation property, high mechanical strength, and excellent heat dissipation property, and the heat dissipation structure is a "sandwich structure", and the polyimide layer 20, the aluminum foil and glass fiber cloth composite layer 10, and the heat conductive silicone layer 30 have better and better heat conductivity and are increased in a trapezoidal shape, which is beneficial to directional heat dissipation. The high-strength insulating sheet can meet the requirements of occasions requiring good heat conduction effects and demanding installation requirements.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A high strength insulating sheet which characterized in that: the heat-conducting glass fiber cloth comprises an aluminum foil glass fiber cloth composite layer (10), a polyimide layer (20) and a heat-conducting silicon adhesive layer (30), wherein the aluminum foil glass fiber cloth composite layer (10) comprises aluminum foil glass fiber cloth, the aluminum foil glass fiber cloth comprises an aluminum foil layer (12) and a glass fiber cloth layer (11), and a white area (13) is arranged between the side edge of the aluminum foil layer (12) and the side edge of the glass fiber cloth layer (11); the polyimide layer (20) completely covers the aluminum foil layer (12), the polyimide layer (20) is connected with the aluminum foil glass fiber cloth into a whole, the surface of the glass fiber cloth layer (11) is coated with an aluminum-plated net layer, the aluminum-plated net layer comprises a plurality of first aluminum-plated areas (51) which are arranged in a matrix shape, a second aluminum-plated area (52) is arranged between every two adjacent first aluminum-plated areas (51), and the second aluminum-plated areas (52) are connected with the first aluminum-plated areas (51) into a whole; the heat-conducting silica gel layer (30) completely covers the aluminized net layer, and the heat-conducting silica gel layer (30) is connected with the aluminum foil and glass fiber cloth composite layer (10) into a whole.

2. The high-strength insulating sheet according to claim 1, wherein: the shape of the first aluminum-plated area (51) is one of regular hexagon, square, diamond, regular triangle and circle.

3. The high-strength insulating sheet according to claim 1, wherein: the second aluminized region (52) is of a strip-shaped structure.

4. The high-strength insulating sheet according to claim 1, wherein: the side edge of the aluminum foil layer (12) is provided with a wavy or zigzag protruding structure (15).

5. The high-strength insulating sheet according to claim 1, wherein: the surface of the aluminum foil glass fiber cloth is provided with needle-punched holes (14) which are in one-to-one correspondence with the first aluminum-plated area (51), and the projection of the needle-punched holes (14) in the first aluminum-plated area (51) is positioned in the central area of the first aluminum-plated area (51).

6. The high-strength insulating sheet according to claim 1, wherein: the ratio of the area of the second aluminum-plated area (52) to the area of the first aluminum-plated area (51) is a, and a is more than or equal to 0.1 and less than or equal to 0.5.