Wrapping type flame-retardant conductive heat-dissipation buffering silica gel foam
The wrapped composite thermal insulation material with a silicone foam core and multilayer structure addresses the lack of fire resistance and compressive stability in conventional materials, providing enhanced cushioning, fire resistance, and thermal conductivity.
Patent Information
- Application Number
- CN202422056427.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-23
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-08-23
AI Technical Summary
The existing wrapped conductive heat dissipation foam loses elasticity in extreme environments and cannot have both flame retardant, heat dissipation and cushioning properties.
The extruded silicone strip foam core is coated with flame-retardant conductive adhesive layer, graphite layer, flame-retardant self-adhesive adhesive layer and flame-retardant conductive cloth layer, and coated with anti-spill coating to form a wrapped flame-retardant conductive heat-dissipation buffered silicone foam.
It achieves excellent buffering performance and resilience in extreme environments, while also having good flame retardant and conductive heat dissipation.
Smart Images
Figure CN223102922U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of composite materials, and particularly to a wrapped flame-retardant, conductive, heat-dissipating and buffering silica gel foam. Background Art
[0002] Some composite tapes with functions such as buffering and heat dissipation are attached to the internal modules of some electronic products, and are also called composite foams. Some of them are wrapped composite foams. The conventional wrapped conductive and heat-dissipating foams on the existing market are conventional PU foam cores without flame-retardant performance, and lose elasticity after being compressed in extreme environments for a long time, seriously affecting the buffering and shock-absorbing performance of the module.
[0003] In view of this, it is necessary to provide a wrapped flame-retardant, conductive, heat-dissipating and buffering silica gel foam. Summary of the Invention
[0004] The wrapped flame-retardant, conductive, heat-dissipating and buffering silica gel foam provided by the utility model effectively solves the problem that the existing composite foam does not have the functions of flame retardancy, heat dissipation, buffering and conductivity at the same time.
[0005] The technical solution adopted by the utility model is
[0006] A wrapped flame-retardant, conductive, heat-dissipating and buffering silica gel foam, comprising an extruded silica gel strip foam core, an outer layer wrapped on the extruded silica gel strip foam core, and a flame-retardant non-substrate conductive adhesive layer bonded to one side outer layer of the outer layer. The outer layer includes a silica gel adhesive layer arranged on the outer side of the extruded silica gel strip foam core, a graphite layer bonded to the outer side of the silica gel adhesive layer, a flame-retardant self-adhesive layer bonded to the outer side of the graphite layer, a flame-retardant conductive cloth layer bonded to the outer side of the flame-retardant self-adhesive layer, and an anti-overflow adhesive coating coated on the outer side of the flame-retardant conductive cloth layer.
[0007] Further: The extruded silica gel strip foam core is hollow.
[0008] Further: At least one side of the extruded silica gel strip foam core is flat, and the side of the flame-retardant non-substrate conductive adhesive layer corresponding to the extruded silica gel strip foam core is flat.
[0009] Further: The thickness of the flame-retardant non-substrate conductive adhesive layer is 0.04 mm - 0.06 mm.
[0010] Further: The thickness of the anti-overflow adhesive coating is 0.003 mm - 0.005 mm, and the thickness of the graphite layer is 0.015 mm - 0.018 mm.
[0011] Advantages of the utility model: Through the excellent cushioning, resilience and flame retardancy of the extruded silicone strip foam, an anti-overflow adhesive coating is applied on the outer side of the flame retardant conductive cloth layer, which can prevent the flame retardant self-adhesive layer from overflowing. The graphite layer can conduct heat effectively. The graphite layer and the flame retardant conductive cloth layer are connected through the flame retardant self-adhesive layer, enabling the entire product to have good cushioning performance, maintain excellent resilience, and have good flame retardant, heat dissipation and conductive properties. Brief Description of the Drawings
[0012] Figure 1 It is a schematic diagram of the overall wrapped flame retardant conductive heat dissipation cushioning silicone foam provided by the embodiment of the present application.
[0013] The markings in the figure are: 1. Extruded silicone strip foam core; 2. Flame retardant non-substrate conductive adhesive layer; 3. Silicone adhesive layer; 4. Graphite layer; 5. Flame retardant self-adhesive layer; 6. Flame retardant conductive cloth layer; 7. Anti-overflow adhesive coating. Detailed Description of the Embodiment
[0014] To make the above objects, features and advantages of the present utility model more obvious and understandable, the following detailed description of the specific embodiments of the present utility model will be given with reference to the accompanying drawings.
[0015] As Figure 1 shown, a wrapped flame retardant conductive heat dissipation cushioning silicone foam provided by the embodiment of the present application has a structure including an extruded silicone strip foam core 1, an outer layer wrapped around the extruded silicone strip foam core 1, and a flame retardant non-substrate conductive adhesive layer 2 adhesively bonded to one of the outer layers of the outer layer. The outer layer includes a silicone adhesive layer 3 disposed on the outer side of the extruded silicone strip foam core 1, a graphite layer 4 adhesively bonded to the outer side of the silicone adhesive layer 3, a flame retardant self-adhesive layer 5 adhesively bonded to the outer side of the graphite layer 4, a flame retardant conductive cloth layer 6 adhesively bonded to the outer side of the flame retardant self-adhesive layer 5, and an anti-overflow adhesive coating 7 coated on the outer side of the flame retardant conductive cloth layer 6.
[0016] In actual use, since the flame retardant non-substrate conductive adhesive layer 2 has no substrate, the entire flame retardant non-substrate conductive adhesive layer 2 is a flame retardant and conductive adhesive with a double-sided adhesive function. Therefore, the product is bonded through the flame retardant non-substrate conductive adhesive layer 2, the silicone strip foam core is used for cushioning and shock absorption, and the outer layer is used for flame retardancy, conductivity and heat dissipation. The flame retardant adhesive is an acrylic adhesive with a viscosity > 1000 gf / 25.4 mm, and the silicone adhesive is a silica adhesive with a viscosity > 800 gf / 25.4 mm. The extruded silicone strip foam core 1 can reach a rebound rate of over 95% after -40°C / 30 min to 150°C / 30 min / 300 cycles, and the flame retardancy can reach UL94V0. The flame retardant conductive cloth layer 6 can have a shielding effectiveness > 60 dB, an XY / Z-direction resistance < 0.05 Ω, and has good flame retardant and conductive properties.
[0017] In the above design, due to the excellent cushioning, resilience, and flame retardancy of the extruded silicone strip foam, an anti-overflow adhesive coating 7 is coated on the outer side of the flame retardant conductive cloth layer 6, which can prevent the flame retardant self-adhesive layer 5 from overflowing. The graphite layer 4 can conduct heat effectively. The graphite layer 4 and the flame retardant conductive cloth layer 6 are connected through the flame retardant self-adhesive layer 5, enabling the entire product to have good cushioning performance, excellent resilience, and good flame retardant, heat dissipation, and electrical conductivity.
[0018] Specifically: The extruded silicone strip foam core 1 is hollow.
[0019] During actual use, setting the extruded silicone strip foam to be hollow can accommodate the deformation of the extruded silicone strip under pressure.
[0020] In the above design, the extruded silicone strip foam core 1 being hollow can effectively achieve extrusion to meet different compressive forces.
[0021] Specifically: At least one side of the extruded silicone strip foam core 1 is a plane, and one side of the flame retardant non-substrate conductive adhesive layer 2 corresponding to the extruded silicone strip foam core 1 is a plane.
[0022] In the above design, setting one side of the extruded silicone strip foam core 1 as a plane enables the flame retardant non-substrate conductive adhesive layer 2 corresponding to the plane to fit more smoothly with the external product.
[0023] Specifically: The thickness of the flame retardant non-substrate conductive adhesive layer 2 is 0.04 mm to 0.06 mm.
[0024] In the above design, the viscosity of the flame retardant non-substrate conductive adhesive > 1500 gf / 25.4 mm, the XY / Z direction resistance < 0.05 Ω, and the thickness of 0.04 mm to 0.06 mm can ensure that the flame retardant non-substrate conductive adhesive layer 2 has good adhesiveness and electrical conductivity.
[0025] Specifically: The thickness of the anti-overflow adhesive coating 7 is 0.003 mm to 0.005 mm, and the thickness of the graphite layer 4 is 0.015 mm to 0.018 mm.
[0026] In the above design, the XY-direction thermal conductivity of graphite > 1300 (W / mK), and the thickness of the graphite layer 4 being 0.015 mm to 0.018 mm can ensure that the graphite layer 4 has good thermal conductivity. The thickness of the anti-overflow adhesive coating 7 being 0.01 mm to 0.02 mm can ensure that the anti-overflow adhesive coating 7 has good prevention of the flame retardant self-adhesive layer 5 from overflowing.
[0027] For further detailed description, it should be understood that the above are only specific embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A wrapped flame-retardant, conductive, heat-dissipating and buffer silicone foam, characterized in that: It includes an extruded silicone strip foam core (1), an outer layer wrapped around the extruded silicone strip foam core (1), and a flame-retardant non-substrate conductive adhesive layer (2) bonded to one side outer layer of the outer layer. The outer layer includes a silicone adhesive layer (3) provided on the outside of the extruded silicone strip foam core (1), a graphite layer (4) bonded to the outside of the silicone adhesive layer (3), a flame-retardant self-adhesive layer (5) bonded to the outside of the graphite layer (4), a flame-retardant conductive cloth layer (6) bonded to the outside of the flame-retardant self-adhesive layer (5), and an anti-bleeding adhesive coating (7) coated on the outside of the flame-retardant conductive cloth layer (6).
2. The wrapped flame-retardant, electrically conductive, heat-dissipating and buffering silica gel foam according to claim 1, wherein: The extruded silicone strip foam core (1) is hollow.
3. The wrapped flame-retardant, electrically conductive, heat-dissipating and buffering silica gel foam according to claim 1, wherein: At least one side of the extruded silicone strip foam core (1) is flat, and the side of the flame-retardant non-substrate conductive adhesive layer (2) corresponding to the extruded silicone strip foam core (1) is flat.
4. The wrapped flame-retardant, electrically conductive, heat-dissipating and shock-absorbing silicone foam according to claim 1, wherein: The thickness of the flame-retardant non-substrate conductive adhesive layer (2) is 0.04 mm to 0.06 mm.
5. The wrapped flame-retardant, electrically conductive, heat-dissipating and buffering silica gel foam according to claim 1, characterized in that: The thickness of the anti-bleeding adhesive coating (7) is 0.003 mm to 0.005 mm, and the thickness of the graphite layer (4) is 0.015 mm to 0.018 mm.