Heat-insulating conductive self-adhesive composite film with shielding function

Abstract

The utility model provides a heat-insulation conductive self-adhesive composite film with a shielding function, which comprises a composite film conductive shielding layer arranged in the middle, composite film conductive fillers are uniformly filled in the composite film conductive shielding layer at intervals, and composite film shielding aluminum foil layers are arranged on two sides of the composite film conductive shielding layer; according to the composite film, a conductive composite material with excellent electromagnetic shielding performance and glass fiber aerogel with low thermal conductivity are compounded to form a heat-insulation electromagnetic shielding material, and the heat-insulation, flame-retardant and high-temperature-resistant performance of the composite film is remarkably improved by compounding aluminum foil and flame-retardant soft porcelain; the composite film has good self-adhesion performance and high-temperature-resistant adhesion performance, the adhesion of the composite film is improved, the composite film is prevented from spontaneously falling off due to high temperature, the conductive filler effectively blocks electromagnetic interference, the low-heat-conductivity heat insulation material can effectively isolate heat in a high-temperature environment, the construction process is simplified through the self-adhesion design, the application efficiency is improved, and the construction cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of heat insulation film, specifically relates to a heat insulation conductive self -adhesion composite film with shielding function. BACKGROUND

[0002] Heat insulation materials are divided into three categories: porous materials, heat reflecting materials and vacuum materials. The former utilizes the pores contained in the material itself for heat insulation, as the air or inert gas in the pores has a very low thermal conductivity; the heat reflecting material has a very high reflection coefficient and can reflect heat. The vacuum heat insulation material utilizes the internal vacuum of the material to achieve heat insulation by blocking convection. The conductive shielding adhesive tape is an adhesive material with conductivity and electromagnetic shielding, which is usually used in consumer digital products for conductive pasting, static discharge and electromagnetic shielding.

[0003] Today's internal digital products tend to be light, thin, compact, beautiful and high-frequency components, and the requirements for heat dissipation, radio frequency interference resistance, electromagnetic compatibility and static discharge are increasing. The conductive shielding adhesive tape on the market is usually made of a conductive cloth with a thickness of 30-50 um as a substrate, which is directly pasted on the PCB board and components after winding the wire, or fixed by using an auxiliary adhesive tape, and the shielding efficiency is low, not beautiful, and the wire is also prone to heat aging.

[0004] The general heat insulation film usually only has heat insulation effect, and the flame retardance, conductivity, electromagnetic shielding and self-adhesion are usually poor, so multiple composite films with different functions are needed, which makes it difficult to balance the effects of various composite films and cannot meet the actual production requirements. UTILITY MODEL CONTENTS

[0005] The utility model discloses to the above prior art exists the insufficient, the main purpose is to provide a kind of heat insulation conductive self-adhesion composite film with shielding function, composite film will have excellent electromagnetic shielding performance Conductive composite material and the glass fiber aerogel with low thermal conductivity are compounded to form heat insulation electromagnetic shielding material, by re-composite aluminum foil, flame-retardant soft porcelain significantly improves the heat insulation flame-retardant high-temperature resistance of composite film, uses the acrylate resin glue of high temperature resistance, with good self-adhesion and high temperature resistant adhesion performance, improves the adhesion of composite film, prevents composite film from spontaneous shedding due to high temperature, the addition of conductive filler makes material can effectively block electromagnetic interference, applicable to the shielding demand of electronic equipment and communication equipment, the heat insulation material of low thermal conductivity makes composite material can effectively insulate heat in high temperature environment, protect internal element, evenly distributed conductive filler makes material have good conductivity, applicable to static dissipation and grounding application.

[0006] To achieve the purpose of the utility model, the technical scheme adopted is:

[0007] The utility model provides a heat -proof conductive self -adhesion composite film with shielding function, including setting in the middle composite film conductive shielding layer, composite film conductive filler is evenly spaced and is filled with in the inside of composite film conductive shielding layer, the both sides of composite film conductive shielding layer are provided with composite film shielding aluminum foil layer, the outside of upper and lower two layers of composite film shielding aluminum foil layer is provided with composite film flame -retardant heat -proof layer, the outside of upper and lower two layers of composite film flame -retardant heat -proof layer is provided with composite film flame -retardant soft porcelain layer, the outside of upper layer's composite film flame -retardant soft porcelain layer is provided with composite film self -adhesion glue layer, the outside of composite film self -adhesion glue layer is provided with composite film release paper layer, the outside of lower layer's composite film flame -retardant soft porcelain layer is provided with composite film printing layer.

[0008] As a preferred technical scheme, the thickness of the composite film conductive shielding layer is 0.05 mm, and the thickness of the composite film conductive shielding layer is greater than or equal to the thickness of the composite film shielding aluminum foil layer.

[0009] As a preferred technical scheme, the thickness of the composite film flame-retardant heat-proof layer is 0.2 mm, and the thickness of the composite film flame-retardant heat-proof layer is greater than or equal to the sum of the thicknesses of the composite film conductive shielding layer, the composite film shielding aluminum foil layer and the composite film self-adhesion glue layer.

[0010] As a preferred technical scheme, the thickness of the composite film conductive filler inside the composite film conductive shielding layer is 0.03 mm, and the thickness of the composite film conductive filler is greater than or equal to the thickness of the composite film shielding aluminum foil layer or the composite film flame-retardant soft porcelain layer.

[0011] As a preferred technical scheme, the thickness of the composite film self-adhesion glue layer is 0.04 mm, which is less than or equal to the thickness of the composite film release paper layer, and the thickness of the composite film self-adhesion glue layer is greater than or equal to the thickness of the composite film printing layer.

[0012] As a preferred technical scheme, the thickness of the composite film self-adhesion glue layer is greater than or equal to the sum of the thicknesses of the composite film shielding aluminum foil layer and the composite film flame-retardant soft porcelain layer, and less than or equal to the sum of the thicknesses of the composite film shielding aluminum foil layer, the composite film flame-retardant soft porcelain layer and the composite film printing layer.

[0013] As a preferred technical scheme, the thickness of the composite film conductive shielding layer is greater than or equal to the sum of the thicknesses of the composite film shielding aluminum foil layer and the composite film flame-retardant soft porcelain layer, and less than or equal to the sum of the thicknesses of the composite film shielding aluminum foil layer, the composite film flame-retardant soft porcelain layer and the composite film printing layer.

[0014] As a preferred technical scheme, the thickness of the composite film flame-retardant soft porcelain layer is greater than or equal to the thickness of the composite film shielding aluminum foil layer, the thicknesses of the composite film shielding aluminum foil layers on the two sides of the composite film conductive shielding layer are the same, and the thicknesses of the composite film flame-retardant soft porcelain layers on the outsides of the two composite film flame-retardant heat-proof layers are the same.

[0015] The utility model provides a heat -proof conductive self -adhesion composite film with shielding function has the following advantages:

[0016] The conductive composite material with excellent electromagnetic shielding performance and the glass fiber aerogel with low thermal conductivity are combined to form a heat-insulating electromagnetic shielding material, the aluminum foil and the flame-retardant soft porcelain are further combined to significantly improve the heat-insulating flame-retardant high-temperature-resistant performance of the composite film, the high-temperature-resistant acrylic resin glue is adopted to have good self-adhesion performance and high-temperature-resistant adhesion performance, the adhesion of the composite film is improved to prevent the composite film from spontaneously falling off due to high temperature, the addition of the conductive filler enables the material to effectively block electromagnetic interference, is suitable for shielding requirements of electronic equipment and communication equipment, the low-thermal-conductivity heat-insulating material enables the composite material to effectively insulate heat in a high-temperature environment and protect internal components, the uniformly distributed conductive filler enables the material to have good conductive performance and be suitable for electrostatic dissipation and grounding applications, the self-adhesion design simplifies the construction process, improves application efficiency, and reduces construction cost. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the internal structure schematic diagram of the heat-insulating conductive self-adhesion composite film with a shielding function of the utility model.

[0018] In the figure: 1, composite film conductive shielding layer; 2, composite film shielding aluminum foil layer; 3, composite film flame-retardant heat-insulating layer; 4, composite film flame-retardant soft porcelain layer; 5, composite film self-adhesion glue layer; 6, composite film release paper layer; 7, composite film conductive filler; 8, composite film printing layer. DETAILED DESCRIPTION

[0019] The utility model will be described and explained further in combination with specific embodiments and the drawings of the specification.

[0020] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the following will be further described in combination with the drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0021] In the description of the utility model, it should be understood that the terms "upper", "lower", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. Embodiment 1

[0022] As Figure 1As shown, a heat-insulating conductive self-adhesive composite film with shielding function comprises a composite film conductive shielding layer 1 arranged in the middle, a composite film conductive filler 7 arranged uniformly and spaced apart in the composite film conductive shielding layer 1, and a composite film shielding aluminum foil layer 2 arranged on both sides of the composite film conductive shielding layer 1; a composite film flame-retardant heat-insulating layer 3 is arranged on the outer side of the upper and lower composite film shielding aluminum foil layers 2; a composite film flame-retardant soft porcelain layer 4 is arranged on the outer side of the upper and lower composite film flame-retardant heat-insulating layers 3; a composite film self-adhesive glue layer 5 is arranged on the outer side of the upper composite film flame-retardant soft porcelain layer 4; a composite film release paper layer 6 is arranged on the outer side of the composite film self-adhesive glue layer 5; and a composite film printing layer 8 is arranged on the outer side of the lower composite film flame-retardant soft porcelain layer 4.

[0023] Further, the thickness of the composite film conductive shielding layer 1 is 0.05 mm, and the thickness of the composite film conductive shielding layer 1 is greater than or equal to the thickness of the composite film shielding aluminum foil layer 2.

[0024] Further, the thickness of the composite film flame-retardant heat-insulating layer 3 is 0.2 mm, and the thickness of the composite film flame-retardant heat-insulating layer 3 is greater than or equal to the sum of the thicknesses of the composite film conductive shielding layer 1, the composite film shielding aluminum foil layer 2, and the composite film self-adhesive glue layer 5.

[0025] Further, the thickness of the composite film conductive filler 7 in the composite film conductive shielding layer 1 is 0.03 mm, and the thickness of the composite film conductive filler 7 is greater than or equal to the thickness of the composite film shielding aluminum foil layer 2 or the composite film flame-retardant soft porcelain layer 4.

[0026] Further, the thickness of the composite film self-adhesive glue layer 5 is 0.04 mm, which is less than or equal to the thickness of the composite film release paper layer 6, and the composite film self-adhesive glue layer 5 is greater than or equal to the thickness of the composite film printing layer 8.

[0027] Further, the thickness of the composite film self-adhesive glue layer 5 is greater than or equal to the sum of the thicknesses of the composite film shielding aluminum foil layer 2 and the composite film flame-retardant soft porcelain layer 4, and less than or equal to the sum of the thicknesses of the composite film shielding aluminum foil layer 2, the composite film flame-retardant soft porcelain layer 4, and the composite film printing layer 8.

[0028] Further, the thickness of the composite film conductive shielding layer 1 is greater than or equal to the sum of the thicknesses of the composite film shielding aluminum foil layer 2 and the composite film flame-retardant soft porcelain layer 4, and less than or equal to the sum of the thicknesses of the composite film shielding aluminum foil layer 2, the composite film flame-retardant soft porcelain layer 4, and the composite film printing layer 8.

[0029] Further, the thickness of the composite film flame-retardant soft porcelain layer 4 is greater than or equal to the thickness of the composite film shielding aluminum foil layer 2, the thickness of the composite film shielding aluminum foil layer 2 on both sides of the composite film conductive shielding layer 1 is the same, and the thickness of the composite film flame-retardant soft porcelain layer 4 on the outer sides of the upper and lower composite film flame-retardant heat-insulating layers 3 is the same.

[0030] First, the shielding layer, the heat insulation layer and the conductive layer are compounded by a hot pressing process, then a layer of high-temperature-resistant acrylic resin glue is coated on the surface of the conductive layer to form a self-adhesive layer, and finally a self-adhesive composite material with shielding function is formed; the composite film is tested for electromagnetic shielding performance, heat insulation performance, conductive performance and adhesive performance, and the composite film can maintain stable performance in a high-temperature environment, and the self-adhesive layer can maintain good adhesive performance in a high-temperature environment;

[0031] The composite film conductive shielding layer 1 has excellent electromagnetic shielding performance and can effectively block electromagnetic interference and radio frequency interference, the composite film shielding aluminum foil layer 2 has low thermal conductivity and can effectively insulate heat transfer in a high-temperature environment, and has excellent electromagnetic shielding effect, the composite film self-adhesive layer 5 uses high-temperature-resistant acrylic resin glue and has good self-adhesive performance and high-temperature-resistant adhesive performance, the composite film conductive filler 7 inside the composite film conductive shielding layer 1 has good conductive performance, and the composite film flame-retardant soft ceramic layer 4 has good flame-retardant and high-temperature-resistant performance. Example 2

[0032] The difference between this embodiment and example 1 is that:

[0033] As shown in Figure 1 , a self-adhesive composite film with shielding function is provided, the composite film shielding aluminum foil layer 2 is replaced by an aluminum metal mesh, which also has excellent shielding effect, and the composite film conductive shielding layer 1 is replaced by a mixed layer of glass fiber cloth and asbestos fiber, which has good high-temperature resistance and flame retardant effect. Example 3

[0034] The difference between this embodiment and examples 1 and 2 is that:

[0035] As shown in Figure 1 , a self-adhesive composite film with shielding function is provided, the composite film conductive filler 7 is replaced by metal fibers, carbon fibers, graphene or carbon nanotubes uniformly distributed in the composite film conductive shielding layer 1, and the composite film conductive shielding layer 1 is replaced by glass fiber aerogel, and the composite film shielding aluminum foil layer 2 is replaced by aluminum metal fiber, which has the same technical effect as examples 1 and 2.

[0036] In the utility model, the conductive composite material with excellent electromagnetic shielding performance and the glass fiber aerogel with low thermal conductivity are compounded to form a heat-insulating electromagnetic shielding material, the aluminum foil and the flame-retardant soft porcelain are further compounded to significantly improve the heat-insulating flame-retardant high-temperature resistant performance of the composite film, the heat-resistant acrylic resin glue is adopted, the composite film has good self-adhesion and high-temperature resistant adhesion, the adhesion of the composite film is improved, the composite film is prevented from spontaneously falling off due to high temperature, the addition of the conductive filler enables the material to effectively block electromagnetic interference, is suitable for shielding requirements of electronic equipment and communication equipment, the heat-insulating material with low thermal conductivity enables the composite material to effectively insulate heat in a high-temperature environment, protects internal components, the uniformly distributed conductive filler enables the material to have good conductive performance, is suitable for static electricity dissipation and grounding application, the self-adhesion design simplifies the construction process, improves application efficiency and reduces construction cost.

[0037] The above-mentioned technical solutions disclosed by the embodiments of the utility model are introduced in detail, the principles and implementation manners of the embodiments of the utility model are described in the text by applying specific embodiments, the above-mentioned embodiment explanations are only applicable to help understanding the principles of the embodiments of the utility model; meanwhile, for the general technical personnel in the art, the embodiments of the utility model will have changes in specific implementation manners and application ranges, and the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A heat-insulating, conductive, self-adhesive composite film with shielding function, characterized in that: It includes a composite film conductive shielding layer (1) set in the middle, a composite film conductive filler (7) uniformly spaced inside the composite film conductive shielding layer (1), and composite film shielding aluminum foil layers (2) set on both sides of the composite film conductive shielding layer (1). The outer side of the upper and lower composite film shielding aluminum foil layers (2) is provided with a composite film flame retardant and heat insulation layer (3), the outer side of the upper and lower composite film flame retardant and heat insulation layers (3) is provided with a composite film flame retardant soft ceramic layer (4), the outer side of the upper composite film flame retardant soft ceramic layer (4) is provided with a composite film self-adhesive layer (5), the outer side of the composite film self-adhesive layer (5) is provided with a composite film release paper layer (6), and the outer side of the lower composite film flame retardant soft ceramic layer (4) is provided with a composite film printing layer (8).

2. The heat-insulating, conductive, self-adhesive composite film with shielding function according to claim 1, characterized in that: The thickness of the composite film conductive shielding layer (1) is 0.05 mm, and the thickness of the composite film conductive shielding layer (1) is greater than or equal to the thickness of the composite film shielding aluminum foil layer (2).

3. The heat-insulating, conductive, self-adhesive composite film with shielding function according to claim 1, characterized in that: The thickness of the composite film flame-retardant heat insulation layer (3) is 0.2 mm. The thickness of the composite film flame-retardant heat insulation layer (3) is greater than or equal to the sum of the thicknesses of the composite film conductive shielding layer (1), the composite film shielding aluminum foil layer (2), and the composite film self-adhesive layer (5).

4. The heat-insulating, conductive, self-adhesive composite film with shielding function according to claim 2, characterized in that: The thickness of the composite conductive filler (7) inside the composite conductive shielding layer (1) is 0.03 mm, and the thickness of the composite conductive filler (7) is greater than or equal to the thickness of the composite shielding aluminum foil layer (2) or the composite flame-retardant soft ceramic layer (4).

5. The heat-insulating, conductive, self-adhesive composite film with shielding function according to claim 3, characterized in that: The thickness of the self-adhesive layer (5) of the composite film is 0.04 mm, which is less than or equal to the thickness of the release paper layer (6) of the composite film, and the thickness of the self-adhesive layer (5) of the composite film is greater than or equal to the thickness of the printing layer (8) of the composite film.

6. The heat-insulating, conductive, self-adhesive composite film with shielding function according to claim 4, characterized in that: The thickness of the composite film self-adhesive layer (5) is greater than or equal to the sum of the thicknesses of the composite film shielding aluminum foil layer (2) and the composite film flame-retardant soft ceramic layer (4), and less than or equal to the sum of the thicknesses of the composite film shielding aluminum foil layer (2), the composite film flame-retardant soft ceramic layer (4), and the composite film printing layer (8).

7. The heat-insulating, conductive, self-adhesive composite film with shielding function according to claim 4, characterized in that: The thickness of the composite film conductive shielding layer (1) is greater than or equal to the sum of the thicknesses of the composite film shielding aluminum foil layer (2) and the composite film flame-retardant soft ceramic layer (4), and less than or equal to the sum of the thicknesses of the composite film shielding aluminum foil layer (2), the composite film flame-retardant soft ceramic layer (4), and the composite film printing layer (8).

8. The heat-insulating, conductive, self-adhesive composite film with shielding function according to claim 6, characterized in that: The thickness of the composite film flame-retardant soft ceramic layer (4) is greater than or equal to the thickness of the composite film shielding aluminum foil layer (2). The thickness of the composite film shielding aluminum foil layer (2) on both sides of the composite film conductive shielding layer (1) is the same. The thickness of the composite film flame-retardant soft ceramic layer (4) on the outside of the two composite film flame-retardant heat insulation layers (3) is the same.

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