Waterproof and fireproof insulating tape

Abstract

The utility model discloses a waterproof and fireproof insulating tape, and relates to the technical field of insulating tapes. The waterproof and fireproof insulating tape comprises a waterproof sealing layer, a fireproof layer, a base material layer and an adhesive layer, the fireproof layer is attached to the base material layer, and the base material layer is attached to the adhesive layer. The waterproof sealing layer is in a U shape and wraps the fireproof layer, the base material layer and the adhesive layer, and an opening of the U shape corresponds to the adhesive layer. The surface, away from the fireproof layer, of the waterproof sealing layer is provided with evenly-arranged submicron-level protruding structures. The fireproof layer is made of ceramic silicone rubber. According to the utility model, the U-shaped waterproof sealing layer is used for wrapping the fireproof layer, the base material layer and the adhesive layer to form a physical moisture barrier, a lateral water seepage path is cut off, and omnidirectional waterproof sealing is realized. The fireproof layer is made of ceramic silicone rubber, has excellent fireproof, flame-retardant, low-smoke and non-toxic characteristics, and can be ceramized in situ to form a hard heat insulation layer in case of fire, oxygen and heat conduction are isolated, and the insulation stability of the base material layer is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of insulating tapes, in particular to a waterproof and fireproof insulating tape. Background Art

[0002] As a key material for electrical protection, insulating tapes are widely used in fields such as wire and cable joint sealing, electronic equipment insulation wrapping, and industrial facility fire protection. With the upgrading of requirements in high-reliability scenarios such as new energy and aerospace, higher requirements are put forward for the functionality of insulating tapes: it is necessary to simultaneously achieve waterproof sealing, fireproof and flame-retardant properties, and stable electrical insulation performance.

[0003] Existing silicone or rubber waterproof sealing tapes, although they have good flexibility and environmental sealing properties, have limited flame retardant grades and are prone to melting and failure at high temperatures; while mica-based or ceramic fiber-based fireproof insulating tapes, although they have excellent high-temperature resistance, are difficult to maintain insulation reliability in humid environments due to their hard and brittle materials and poor hydrophobicity.

[0004] For application scenarios such as high-voltage cable joints and airborne equipment wire harnesses that need to be exposed to humid and temperature-variable environments for a long time, existing tapes are difficult to meet the usage requirements. Therefore, there is an urgent need to develop a composite tape that can provide reliable waterproof and fireproof protection. Summary of the Utility Model

[0005] The technical problem to be solved by the embodiments of the utility model is to provide an insulating tape with reliable waterproof and fireproof protection.

[0006] To solve the above problems, the embodiments of the utility model propose the following technical problems:

[0007] A waterproof and fireproof insulating tape, comprising: a waterproof sealing layer, a fireproof layer, a base material layer, and an adhesive layer; the fireproof layer is adhered to the base material layer, and the base material layer is adhered to the adhesive layer;

[0008] The waterproof sealing layer is in a "C" shape, wrapping the fireproof layer, the base material layer, and the adhesive layer, and the opening of the "C" shape corresponds to the adhesive layer; the surface of the waterproof sealing layer away from the fireproof layer has uniformly arranged sub-micron-scale protrusion structures;

[0009] The fireproof layer is ceramicized silicone rubber.

[0010] A further technical solution thereof is that a nano-silica hydrophobic coating is attached to the surface of the waterproof sealing layer away from the fireproof layer.

[0011] A further technical solution thereof is that the material of the waterproof sealing layer is butyl rubber.

[0012] A further technical solution thereof is that thermosensitive glass fiber bundles and expandable graphite particles are filled between the fireproof layer and the base material layer.

[0013] A further technical solution is that the diameter of the temperature-sensitive glass fiber bundle is smaller than the particle size of the expandable graphite particles.

[0014] A further technical solution is that the diameter of the temperature-sensitive glass fiber bundle is 2-5μm, and the particle size of the expandable graphite particles is 8-15μm.

[0015] A further technical solution includes an epoxy resin buffer layer, wherein the temperature-sensitive glass fiber bundle and expandable graphite particles are located within the epoxy resin buffer layer.

[0016] A further technical solution is that the substrate layer is made of polyimide.

[0017] A further technical solution is that the adhesive layer is a flame-retardant silicone pressure-sensitive adhesive.

[0018] A further technical solution includes a release layer, which is bonded to the adhesive layer.

[0019] Compared with the prior art, the technical effects achieved by the embodiments of this utility model include:

[0020] This invention provides a waterproof and fireproof insulating tape, comprising: a waterproof sealing layer, a fireproof layer, a substrate layer, and an adhesive layer; the fireproof layer is bonded to the substrate layer, and the substrate layer is bonded to the adhesive layer; the waterproof sealing layer is U-shaped, enclosing the fireproof layer, substrate layer, and adhesive layer, with the opening of the U-shape corresponding to the adhesive layer; the surface of the waterproof sealing layer away from the fireproof layer has uniformly arranged submicron-level protrusions; the fireproof layer is made of ceramicized silicone rubber. This invention utilizes the U-shaped waterproof sealing layer to cover the fireproof layer, substrate layer, and adhesive layer, forming a physical moisture barrier, cutting off lateral water seepage paths, and achieving omnidirectional waterproof sealing. The surface of the waterproof sealing layer is provided with submicron-level protrusions, forming a biomimetic micro-nano hydrophobic surface, which helps to increase the surface contact angle of the waterproof sealing layer, cut off the water molecule wetting path, and improve waterproof capability. The fireproof layer is made of ceramicized silicone rubber, which has excellent fireproof, flame-retardant, low-smoke, and non-toxic properties. When exposed to fire, it can be ceramicized in situ to form a hard heat insulation layer, which isolates oxygen and heat conduction, and ensures the insulation stability of the substrate layer. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0024] Figure 1 This is a structural schematic diagram of a waterproof and fireproof insulating tape provided in an embodiment of the present invention;

[0025] Figure 2 This is a structural schematic diagram of a waterproof and fireproof insulating tape provided in another embodiment of the present invention.

[0026] Figure Labels

[0027] 1. Adhesive layer; 2. Substrate layer; 3. Fireproof layer; 4. Waterproof sealing layer; 5. Epoxy resin buffer layer; 6. Protruding structure. Detailed Implementation

[0028] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Similar component reference numerals in the drawings represent similar components. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0029] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0030] It should also be understood that the terminology used in this specification of embodiments of the present invention is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of the present invention. As used in this specification of embodiments of the present invention and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0031] See Figure 1, which is a schematic structural diagram of a waterproof, fireproof and insulating tape provided by this embodiment. As can be seen from the figure, the waterproof, fireproof and insulating tape of this embodiment includes: a waterproof sealing layer 4, a fireproof layer 3, a base material layer 2 and an adhesive layer 1; the fireproof layer 3 is bonded to the base material 2 layer, and the base material layer 2 is bonded to the adhesive layer 1;

[0032] The waterproof sealing layer 4 is in an "L" shape, wrapping the fireproof layer 3, the base material layer 2 and the adhesive layer 1, and the opening of the "L" shape corresponds to the adhesive layer 1; the surface of the waterproof sealing layer 4 away from the fireproof layer 3 has a uniformly arranged sub-micron protrusion structure 6; the fireproof layer 3 is a ceramized silicone rubber.

[0033] In this embodiment, the "L" shaped waterproof sealing layer 4 is used to cover the fireproof layer 3, the base material layer 2 and the adhesive layer 1 to form a physical moisture barrier, cut off the lateral water seepage path, and achieve all-directional waterproof sealing. The surface of the waterproof sealing layer 4 is provided with a sub-micron protrusion structure 6 to form a bionic micro-nano hydrophobic surface, which helps to increase the surface contact angle of the waterproof sealing layer, cut off the water molecule infiltration path, and improve the waterproof ability. The fireproof layer 3 is a ceramized silicone rubber, which has excellent fireproof, flame-retardant, low-smoke and non-toxic properties. When encountering fire, it can be ceramized in-situ to form a hard heat-insulating layer, isolating oxygen and heat conduction, and ensuring the insulation stability of the base material layer.

[0034] In a specific embodiment, a nano-silica hydrophobic coating is attached to the surface of the waterproof sealing layer 4 away from the fireproof layer 3.

[0035] In this embodiment, a nano-silica hydrophobic coating is attached to the surface of the sub-micron protrusion structure 6 to synergistically enhance the hydrophobic effect of the waterproof sealing layer and block the infiltration of oily liquids.

[0036] In a specific embodiment, the material of the waterproof sealing layer 4 is butyl rubber.

[0037] In some embodiments, the thickness of the waterproof sealing layer 4 is 0.1 - 0.3 mm.

[0038] In one embodiment, the thickness of the waterproof sealing layer 4 is 0.1 mm.

[0039] In one embodiment, the thickness of the waterproof sealing layer 4 is 0.2 mm.

[0040] In some embodiments, the thickness of the waterproof sealing layer 4 is 0.3 mm.

[0041] In other embodiments, the material of the waterproof sealing layer 4 is specifically fluorinated modified butyl rubber, which has high weather resistance and certain flexibility, can compensate for the micro-gaps generated by the deformation of the "L" shape structure, and maintain long-term sealing performance.

[0042] It should be noted that there is an error in the description in the original text. The "匚" shape should be "L" shape as translated above to make the description more reasonable in terms of the structure of the waterproof sealing layer wrapping the other layers. If this is not a typo in the original, please let me know and I will adjust according to your request.For the waterproof sealing layer 4 in this embodiment, a submicron protrusion structure 6 can be etched on the butyl rubber surface using a laser etching process, and then nano-SiO2 particles can be deposited in the vapor phase to form a superhydrophobic surface with dual roughness.

[0043] In some embodiments, the thickness of the fireproof layer 3 is 0.1-0.5 mm.

[0044] In one embodiment, the thickness of the fireproof layer 3 is 0.1 mm.

[0045] In one embodiment, the thickness of the fireproof layer 3 is 0.2 mm.

[0046] In some embodiments, the thickness of the fireproof layer 3 is 0.3 mm.

[0047] In some embodiments, the thickness of the fireproof layer 3 is 0.5 mm.

[0048] See further Figure 2 In another embodiment of the present invention, the fireproof layer 3 and the substrate layer 2 are filled with temperature-sensitive glass fiber bundles and expandable graphite particles.

[0049] It should be noted that the temperature-sensitive glass fiber has a Tg of 380℃, and it can melt into a viscous liquid when exposed to fire. This liquid can flow and fill the microcracks in the ceramicized silicone rubber, thereby improving the integrity of the ceramicized silicone rubber.

[0050] Expandable graphite can expand at high temperatures to form a honeycomb structure, which can effectively isolate flames and heat conduction.

[0051] In one specific embodiment, the diameter of the temperature-sensitive glass fiber bundle is smaller than the particle size of the expandable graphite particles. The small-sized temperature-sensitive glass fibers fully penetrate the voids of the large-sized expandable graphite particles, which helps to quickly eliminate microporous defects in the fireproof layer.

[0052] In some embodiments, the diameter of the temperature-sensitive glass fiber bundle is 2-5 μm, and the particle size of the expandable graphite particles is 8-15 μm.

[0053] In one embodiment, the temperature-sensitive glass fiber bundle has a diameter of 2 μm, and the expandable graphite particles have a particle size of 8 μm.

[0054] In one embodiment, the temperature-sensitive glass fiber bundle has a diameter of 3 μm, and the expandable graphite particles have a particle size of 9 μm.

[0055] Another embodiment of the waterproof and fireproof insulating tape provided by this utility model further includes an epoxy resin buffer layer 5, wherein the temperature-sensitive glass fiber bundle and expandable graphite particles are located within the epoxy resin buffer layer 5.

[0056] In one embodiment, the temperature-sensitive glass fiber bundles and expandable graphite particles can protrude from the epoxy resin buffer layer 5 and partially enter the fireproof layer 3.

[0057] In this embodiment, the epoxy resin buffer layer 5 can constrain the displacement of the temperature-sensitive glass fiber bundles and expandable graphite particles, preventing them from falling off during construction. At the same time, it can relieve the stress between the fireproof layer 3 and the substrate layer 2.

[0058] In some embodiments, the thickness of the epoxy resin buffer layer 5 is 0.02-0.08 mm.

[0059] In one embodiment, the epoxy resin buffer layer 5 has a thickness of 0.02 mm.

[0060] In one embodiment, the epoxy resin buffer layer 5 has a thickness of 0.03 mm.

[0061] In some embodiments, the epoxy resin buffer layer 5 has a thickness of 0.05 mm.

[0062] In some embodiments, the epoxy resin buffer layer 5 has a thickness of 0.06 mm.

[0063] In one embodiment, the substrate layer 2 is made of polyimide.

[0064] In some embodiments, the thickness of the substrate layer 2 is 0.05-0.15 mm.

[0065] In one embodiment, the thickness of the substrate layer 2 is 0.05 mm.

[0066] In one embodiment, the thickness of the substrate layer 2 is 0.08 mm.

[0067] In some embodiments, the thickness of the substrate layer 2 is 0.10 mm.

[0068] In some embodiments, the thickness of the substrate layer 2 is 0.13 mm.

[0069] In one embodiment, the adhesive layer 1 is a flame-retardant silicone pressure-sensitive adhesive.

[0070] In some embodiments, the thickness of the adhesive layer 1 is 0.05-0.15 mm.

[0071] In one embodiment, the thickness of the adhesive layer 1 is 0.05 mm.

[0072] In one embodiment, the thickness of the adhesive layer 1 is 0.08 mm.

[0073] In some embodiments, the thickness of the adhesive layer 1 is 0.10 mm.

[0074] In some embodiments, the thickness of the adhesive layer 1 is 0.13 mm.

[0075] In one embodiment, the waterproof and fireproof insulating tape provided by this utility model further includes a release layer (not shown), which is bonded to the adhesive layer 1.

[0076] The release layer is used to protect the initial tack of the adhesive layer 1, ensuring that the adhesive layer 1 at the "U"-shaped opening end is instantly bonded during construction, maintaining the sealing integrity of the wrapped structure before construction.

[0077] The release layer is made of a conventional material, and this embodiment does not limit it.

[0078] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0079] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0080] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0081] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0082] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0083] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0084] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Since these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

[0085] The above description describes specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A waterproof and fireproof insulating tape, characterized in that, Comprising: A waterproof sealing layer, a fireproof layer, a substrate layer and an adhesive layer; the fireproof layer is adhered to the substrate layer, and the substrate layer is adhered to the adhesive layer; The waterproof sealing layer is in a "C" shape, wrapping the fireproof layer, the substrate layer and the adhesive layer, and the opening of the "C" shape corresponds to the adhesive layer; The surface of the waterproof sealing layer away from the fireproof layer has uniformly arranged sub-micron protrusion structures; The fireproof layer is a ceramized silicone rubber.

2. The waterproof and fireproof insulating tape as described in claim 1, characterized in that, The surface of the waterproof sealing layer away from the fireproof layer is attached with a nano-silica hydrophobic coating.

3. The waterproof and fireproof insulating tape as described in claim 1, characterized in that, The material of the waterproof sealing layer is butyl rubber.

4. The waterproof and fireproof insulating tape as described in claim 1, characterized in that, Thermosensitive glass fiber bundles and expandable graphite particles are filled between the fireproof layer and the substrate layer.

5. The waterproof and fireproof insulating tape as described in claim 4, characterized in that, The diameter of the thermosensitive glass fiber bundles is smaller than the particle size of the expandable graphite particles.

6. The waterproof and fireproof insulating tape as described in claim 5, characterized in that, The diameter of the thermosensitive glass fiber bundles is 2 - 5 μm, and the particle size of the expandable graphite particles is 8 - 15 μm.

7. The waterproof and fireproof insulating tape as described in claim 6, characterized in that, An epoxy resin buffer layer is further included, and the thermosensitive glass fiber bundles and the expandable graphite particles are located in the epoxy resin buffer layer.

8. The waterproof and fireproof insulating tape as described in claim 1, characterized in that, The material of the substrate layer is polyimide.

9. The waterproof and fireproof insulating tape as described in claim 1, characterized in that, The adhesive layer is a flame-retardant silicone pressure-sensitive adhesive.

10. The waterproof and fireproof insulating tape as described in claim 1, characterized in that, A release layer is further included, and the release layer is adhered to the adhesive layer.

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