Heat-conducting putty sheet with operability
By applying the silicon gel layer up and down the surface and bottom surface of the thermal conductivity, and the upper and lower surface surface of the silicon gel layer, the existing composite heat dissipation material is solved. The high -efficiency thermal conductivity, compression and good operating of thermal carrier sheet.
Patent Information
- Application Number
- CN202420235352.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-31
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-01-31
AI Technical Summary
When existing composite heat dissipation materials come into contact with solids, due to rough and uneven surfaces, 98% of the area does not contact, affecting the thermal conductivity, and the easily compressed products have poor operability during deformation and cutting, which is prone to falling off problems.
The combination structure of the conductive heatement layer, silicon gel layer and lyric membrane layer. The thermal conductivity layer has high thermal conductivity and compression. The silicon gel layer provides viscosity and toughness. Increase viscosity during use to prevent falling off.
The good thermal conductivity, excellent compression and good operability of thermal conductive putty sheets are realized, and it is not easy to fall off when it is used in the back end.
Smart Images
Figure CN222411398U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a composite heat dissipation material, in particular to an operable heat-conducting putty sheet. Background Art
[0002] With the rapid development of high-tech fields such as electronics, aviation, and communications, the heat generated in electronic systems is also increasing. According to the "10°C rule" in the electronics industry, when the operating temperature of electronic components increases by 10°C, their service life will be reduced by half and their reliability will be reduced by half. At the same time, as the operating temperature increases, the rate of reduction of their service life will gradually increase. The current development status has put forward higher requirements for heat dissipation materials.
[0003] The composite heat dissipation materials currently on the market mainly include thermal grease, thermal pads, phase change materials, thermal mud, thermal putty and thermal gel. From a microscopic point of view, the surfaces of the above materials are not absolutely flat, but rough and uneven; even if high pressure is applied when in direct contact with solids, 98% of the area is still not in contact, and this part is occupied by insulating air. The thermal conductivity of air is low, only 0.0242W / m*k, which will affect the heat conduction effect. Therefore, it is necessary to use compressible thermal interface materials, such as thermal silicone sheets, thermal grease and other compressible products. However, due to the problem of their compressibility, they are prone to deformation and are not easy to cut into the required shape, which greatly reduces operability. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide an operable thermally conductive putty sheet material, which has good thermal conductivity, excellent compressibility and good operability, and will not fall off when the product is used at the rear end.
[0005] The technical solutions adopted by the utility model to solve the above problems are as follows:
[0006] A heat-conducting putty sheet with operability, comprising a heat-conducting putty layer, the upper and lower surfaces of the heat-conducting putty layer are covered with a silicone gel layer, and the upper and lower outer surfaces of the silicone gel layer are covered with a release film layer. The heat-conducting putty layer mainly plays a heat-conducting role, and has the advantages of high thermal conductivity, easy compression, arbitrary shaping, low oil output and high temperature resistance. The role of the silicone gel layer is to provide a certain degree of viscosity, and at the same time has the advantages of good toughness, easy compression, low oil output and high temperature resistance. The release film layer can protect the entire sheet before use, and play a role in increasing viscosity and preventing falling off when used at the rear end.
[0007] Furthermore, the thickness of the thermally conductive putty layer is 0.5 to 5 mm. The selected thickness of the thermally conductive putty layer can make the thermally conductive putty sheet have good operability. If the thickness of the thermally conductive putty layer is too small, the operability of the thermally conductive putty sheet will be significantly reduced.
[0008] Furthermore, the thermal conductivity of the thermally conductive putty layer is ≥1W / (m*k).
[0009] Furthermore, the thermally conductive putty layer is selected as Japan Fuji polymer thermally conductive putty GR-Pm.
[0010] Furthermore, the silicone gel layer is a thermally conductive silicone gel sheet.
[0011] Furthermore, the thickness of the silicone gel layer is 100 to 300 μm. If the thickness of the silicone gel layer is too small, glue leakage is likely to occur during processing, increasing the difficulty of processing; if the thickness of the silicone gel layer is too large, the thermal conductivity effect will be significantly reduced. The utility model selects a silicone gel layer with a thickness of 100 to 300 μm, which has a good thermal conductivity effect, and will not leak glue during processing, reducing the difficulty of processing.
[0012] Furthermore, the needle penetration of the silicone gel layer is 50 to 200 (0.1 mm). If the needle penetration of the silicone gel layer is too small, its compressibility is poor; if the needle penetration of the silicone gel layer is too large, its operability is poor. The needle penetration of the silicone gel layer selected by the utility model has both good compressibility and operability, which is conducive to the sheet material to obtain excellent compressibility and good operability, and is convenient for the processing and manufacturing of the sheet material.
[0013] Furthermore, the surface viscosity of the silicone gel layer is greater than that of 8# ball, the elongation is greater than 200%, and the loss factor is greater than or equal to 0.5. The greater the surface viscosity of the silicone gel layer, the less likely it is to fall off when used at the rear end; the greater the elongation of the silicone gel layer, the better its flexibility, the stronger its plasticity, and the better its compressibility; the greater the loss factor of the silicone gel layer, the stronger its vibration reduction ability, the better its viscoelasticity, and the less likely it is to fall off when the material moves or falls.
[0014] Furthermore, the silicone gel layer is selected as FFG-40100 silicone gel produced by Sekisui Chemical of Japan.
[0015] Furthermore, the release film layer is any one of PET silicone oil release film, PET non-silicon release film, and PET fluorine release film.
[0016] Furthermore, the thickness of the release film layer is 30 to 100 μm. Selecting a release film layer with a thickness of 30 to 100 μm is conducive to the preparation of thermal conductive putty sheets, and wrinkles are not easy to appear during online processing, reducing the difficulty of processing; at the same time, the thickness of the release film layer is controlled to reduce costs.
[0017] Furthermore, the release force of the release film layer is 1-10g. The release force of the selected release film layer is 1-10g, which is easy to tear when used at the rear end, and ensures a certain degree of stickiness without falling off.
[0018] The method for preparing the operable thermally conductive putty sheet comprises the following steps:
[0019] S1. The thermal putty is stirred evenly with a planetary mixer and then de-vacuumed. The thermal putty is pasted with a release film on both sides through a press. The thickness of the thermal putty is controlled by the gap between the rollers of the calender to obtain a thermal putty layer with a release film on both sides.
[0020] S2. The silicone gel was stirred evenly with a planetary mixer, and the vacuum was removed. After the press, the silicone gel was affixed with a release film on both sides. The thickness of the silicone gel was controlled by the gap between the rollers of the calender to obtain a silicone gel layer with a release film on both sides.
[0021] S3. Curing the silicone gel layer described in step S2, wherein the curing temperature is 120° C. and the curing time is 30 min; removing the release film on one side of the silicone gel layer, and removing the release films on the upper and lower sides of the thermally conductive putty layer described in step S1, so that the upper and lower sides of the thermally conductive putty layer are bonded to the surface of the silicone gel layer from which the release film has been removed, to obtain a semi-finished product;
[0022] S5. Treat the semi-finished product with a corona machine to obtain a workable thermally conductive putty sheet; wherein the voltage of the corona machine is 10KV.
[0023] The utility model has the following beneficial effects:
[0024] The utility model obtains an operable thermally conductive putty sheet by pasting a silicone gel layer on the upper and lower surfaces of a thermally conductive putty layer, and pasting a release film layer on the upper and lower surfaces of the silicone gel. The thermally conductive putty layer used plays a role of heat conduction, and has the advantages of high thermal conductivity, easy compression, arbitrary shaping, low oil output and high temperature resistance. The silicone gel used has plasticity and compressibility, will not affect the excellent compressibility of the thermally conductive putty layer, can provide a certain viscosity, and has the advantages of good toughness, easy compression, low oil output and high temperature resistance. The release film layer can form protection for the entire sheet before use, and plays a role in increasing viscosity and preventing falling off when the release film is torn off at the rear end to use the product. The new thermally conductive putty sheet used has good thermal conductivity, excellent compressibility and good operability, and will not fall off when the product is used at the rear end. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 This is a schematic diagram of the cross-sectional structure of an operable thermally conductive putty sheet according to Embodiment 1 of the utility model;
[0026] Figure 2 This is a schematic diagram of the cross-sectional structure of an operable thermally conductive putty sheet according to Embodiment 2 of the present utility model;
[0027] Figure 3 This is a schematic diagram of the cross-sectional structure of an operable thermally conductive putty sheet according to Example 3 of the utility model. DETAILED DESCRIPTION
[0028] The present invention is described in detail below with reference to the examples, which are only preferred embodiments of the present invention and are not intended to limit the present invention. The methods involved in the present invention are all commonly used methods in the art unless otherwise specified; the reagents involved are all available from common commercial sources unless otherwise specified.
[0029] In order to further explain the technical means and effects adopted by the utility model to achieve the predetermined utility model purpose, the following is a detailed description of the specific implementation method, method, steps, characteristics and effects of an operational thermal conductive putty sheet proposed according to the utility model in combination with the accompanying drawings and preferred embodiments.
[0030] The following three embodiments have operable preparation methods of thermally conductive putty sheets:
[0031] S1. The thermal putty is stirred evenly with a planetary mixer and then de-vacuumed. The thermal putty is pasted with a release film on both sides through a press. The thickness of the thermal putty is controlled by the gap between the rollers of the calender to obtain a thermal putty layer with a release film on both sides.
[0032] S2. The silicone gel was stirred evenly with a planetary mixer, and the vacuum was removed. After the press, the silicone gel was affixed with a release film on both sides. The thickness of the silicone gel was controlled by the gap between the rollers of the calender to obtain a silicone gel layer with a release film on both sides.
[0033] S3. Curing the silicone gel layer described in step S2, wherein the curing temperature is 120° C. and the curing time is 30 min; removing the release film on one side of the silicone gel layer, and removing the release films on the upper and lower sides of the thermally conductive putty layer described in step S1, so that the upper and lower sides of the thermally conductive putty layer are bonded to the surface of the silicone gel layer from which the release film has been removed, to obtain a semi-finished product;
[0034] S5. Treat the semi-finished product with a corona machine to obtain a workable thermally conductive putty sheet; wherein the voltage of the corona machine is 10KV. Example 1
[0035] like Figure 1As shown, the operational thermally conductive putty sheet provided in this embodiment includes a thermally conductive putty layer 1, the upper and lower surfaces of the thermally conductive putty layer are covered with a silicone gel layer 2, and the upper and lower outer surfaces of the silicone gel layer are covered with a release film layer 3.
[0036] The material of the thermally conductive putty layer 1 is thermally conductive putty, specifically Japanese Fuji polymer thermally conductive putty GR-Pm, with a thickness of 2 mm and a thermal conductivity of 6 W / (m*k).
[0037] The silicone gel layer 2 is a thermally conductive silicone gel sheet, specifically FFG-40100 produced by Sekisui Chemical of Japan, with a thickness of 200 μm, a needle penetration of 100 (0.1 mm), a surface viscosity of 10# ball, an elongation of 240%, and a loss factor of 0.6.
[0038] The release film layer 3 is a PET fluorine release film with a release force of 1 to 3 g and a thickness of 50 μm.
[0039] The thermal putty sheet of Example 1 was tested, and its thickness was 2.4 mm, thermal conductivity was 5.13 W / (m*k), surface viscosity was 10# ball, breakdown voltage was 11.6 KV / mm, and force measured at 25% offset was 14.6 psi. The thermal putty sheet of Example 1 has good operability and can be cut into various sheets. Since its surface is sticky, it will not fall off after use. Example 2
[0040] like Figure 2 As shown, the operational thermally conductive putty sheet provided in this embodiment includes a thermally conductive putty layer 1, the upper and lower surfaces of the thermally conductive putty layer are covered with a silicone gel layer 2, and the upper and lower outer surfaces of the silicone gel layer are covered with a release film layer 3.
[0041] The material of the thermally conductive putty layer 1 is thermally conductive putty, specifically Japanese Fuji polymer thermally conductive putty GR-Pm, with a thickness of 1.5 mm and a thermal conductivity of 6 W / (m*k).
[0042] The silicone gel layer 2 is a thermally conductive silicone gel sheet, specifically FFG-40100 produced by Sekisui Chemical of Japan, with a thickness of 150 μm, a needle penetration of 100 (0.1 mm), a surface viscosity of 10# ball, an elongation of 240%, and a loss factor of 0.6.
[0043] The release film layer 3 is a PET fluorine release film with a release force of 1 to 3 g and a thickness of 50 μm.
[0044] The thermally conductive putty sheet of Example 2 was tested, and its thickness was 1.8 mm, the thermal conductivity was 4.82 W / (m*k), the surface viscosity was 10# ball, the breakdown voltage was 10.8 KV / mm, and the force measured at 25% offset was 15.3 psi. The thermally conductive putty sheet of Example 2 has good operability and can be cut into various sheets. Since its surface is sticky, it will not fall off after use. Example 3
[0045] like Figure 3 As shown, the operational thermally conductive putty sheet provided in this embodiment includes a thermally conductive putty layer 1, the upper and lower surfaces of the thermally conductive putty layer are covered with a silicone gel layer 2, and the upper and lower outer surfaces of the silicone gel layer are covered with a release film layer 3.
[0046] The material of the thermally conductive putty layer 1 is thermally conductive putty, specifically Japanese Fuji polymer thermally conductive putty GR-Pm, with a thickness of 1.0 mm and a thermal conductivity of 6 W / (m*k).
[0047] The silicone gel layer 2 is a thermally conductive silicone gel sheet, specifically FFG-40100 from Sekisui Chemical of Japan, with a thickness of 100 μm, a needle penetration of 100 (0.1 mm), a surface viscosity of 10# ball, an elongation of 240%, and a loss factor of 0.6.
[0048] The release film layer 3 is a PET fluorine release film with a release force of 1 to 3 g and a thickness of 50 μm.
[0049] The thermally conductive putty sheet of Example 3 was tested, and its thickness was 1.2 mm, the thermal conductivity was 4.58 W / (m*k), the surface viscosity was 10# ball, the breakdown voltage was 10.6 KV / mm, and the force measured at 25% offset was 16.7 psi. The thermally conductive putty sheet of Example 3 has good operability and can be cut into various sheets. Since its surface is sticky, it will not fall off after use.
[0050] It can be known from the above embodiments that the utility model obtains an operable thermally conductive putty sheet by pasting a silicone gel layer on the upper and lower surfaces of the thermally conductive putty layer, and pasting a release film layer on the upper and lower surfaces of the silicone gel. The thermally conductive putty layer used plays a role of heat conduction, and has the advantages of high thermal conductivity, easy compression, arbitrary shaping, low oil output and high temperature resistance. The silicone gel used has plasticity and compressibility, will not affect the excellent compressibility of the thermally conductive putty layer, can provide a certain viscosity, and has the advantages of good toughness, easy compression, low oil output and high temperature resistance. The release film layer can form protection for the sheet as a whole before use, and play a role in increasing viscosity and preventing falling off when the product is used at the back end. The new thermally conductive putty sheet used has good thermal conductivity, excellent compressibility and good operability, and will not fall off when the product is used at the back end.
[0051] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present invention.
[0052] It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of the embodiments of the present application, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", etc. is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the application product is usually placed when in use, or the orientation or position relationship commonly understood by those skilled in the art, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.
[0053] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.
[0054] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.
Claims
1. An operable thermally conductive putty sheet, characterized in that: It comprises a heat-conducting putty layer (1), the upper and lower surfaces of the heat-conducting putty layer are covered with a silicone gel layer (2), and the upper and lower outer surfaces of the silicone gel layer are covered with a release film layer (3).
2. The operable thermally conductive putty sheet according to claim 1, characterized in that: The thickness of the thermally conductive putty layer (1) is 0.5 to 5 mm.
3. The operable thermally conductive putty sheet according to claim 1, characterized in that: The thermal conductivity of the thermally conductive putty layer (1) is ≥1 W / (m*k).
4. The operable thermally conductive putty sheet according to claim 1, characterized in that: The silicone gel layer (2) is a thermally conductive silicone gel sheet.
5. The operable thermally conductive putty sheet according to claim 1, characterized in that: The thickness of the silicone gel layer (2) is 100 to 300 μm.
6. The operable thermally conductive putty sheet according to claim 1, characterized in that: The needle penetration of the silicone gel layer (2) is 50 to 200 (0.1 mm).
7. The operable thermally conductive putty sheet according to claim 1, characterized in that: The surface viscosity of the silicone gel layer (2) is greater than 8# ball, the elongation is greater than 200%, and the loss factor is greater than or equal to 0.
5.
8. The operable thermally conductive putty sheet according to claim 1, characterized in that: The release film layer (3) is any one of a PET silicone oil release film, a PET non-silicon release film, and a PET fluorine release film.
9. The operable thermally conductive putty sheet according to claim 1, characterized in that: The thickness of the release film layer (3) is 30 to 100 μm.
10. The operable thermally conductive putty sheet according to claim 1, characterized in that: The release force of the release film layer (3) is 1 to 10 g.