VHB adhesive tape for elevator structural member and low-temperature construction method of VHB adhesive tape

Abstract

The invention discloses a VHB adhesive tape for an elevator structural member, the VHB adhesive tape comprises a substrate layer, a bonding layer and a release layer, the substrate layer, the bonding layer and the release layer are connected in sequence, the substrate layer is made of polyacrylate foam and is of a closed-cell structure, the closed-cell rate is greater than or equal to 95%, the density is 100-120kg / m, and the release layer is made of polyurethane foam. The compressive strength is greater than or equal to 150kPa; at least one surface of the matrix layer is coated with the bonding layer, and the bonding layer comprises an acrylate adhesive, a silane coupling agent and a cross-linking agent; the release layer covers the outer surface of the bonding layer, the release layer is a silicone oil release film, and the stripping force of the release layer is less than or equal to 0.5 N / cm. Through the mode, according to the VHB adhesive tape for the elevator structural component and the low-temperature construction method of the VHB adhesive tape, original materials are improved, construction in a low-temperature environment is optimized, and the problems existing in an existing traditional VHB adhesive tape are solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of elevator installation, and particularly relates to a VHB adhesive tape for elevator structural members and a low-temperature construction method thereof. BACKGROUND

[0002] In the fixing of elevator structural members, the VHB adhesive tape needs to consider high strength, durability, environmental adaptability and construction convenience, and can replace the combination of traditional screws and sealant to simplify the construction process.

[0003] The VHB adhesive tape is a double-sided foam adhesive tape invented and produced by 3M Company, which not only provides adhesion, but also seals, dampens, soundproofs, insulates, and compensates for the difference in thermal expansion coefficient between different materials.

[0004] The existing traditional VHB adhesive tape has poor extrudability at low temperature, slow solidification speed, and poor adhesion between some complex substrates (such as powder coated steel plates and composite materials), resulting in adhesion failure. SUMMARY

[0005] The technical problem solved by the present application is to provide a VHB adhesive tape for elevator structural members and a low-temperature construction method thereof, which solves the problems of the existing traditional VHB adhesive tape.

[0006] To solve the above technical problems, one technical solution adopted by the present application is to provide a VHB adhesive tape for elevator structural members, comprising a base layer, an adhesive layer and a release layer, which are connected in sequence, and the composition of the base layer, the adhesive layer and the release layer comprises: The base layer is composed of high-density polyacrylate foam, which has a closed pore structure with a closed pore rate of 95% or more and a density of 100-120 kg / m, and a compressive strength of 150 kPa or more; The adhesive layer is coated on at least one surface of the base layer, and the adhesive layer comprises an acrylic adhesive, a silane coupling agent and a crosslinking agent; The release layer covers the outer surface of the adhesive layer, and the release layer is a silicone release film with a peel force of 0.5 N / cm or less.

[0007] In a preferred embodiment of the present application, the high-density polyacrylate foam is added with a low-temperature resistant modifier and an anti-aging additive, the low-temperature resistant modifier is selected from at least one of dioctyl sebacate or silane modifier, and the anti-aging additive is selected from at least one of hindered amine light stabilizer or benzotriazole ultraviolet absorber.

[0008] In a preferred embodiment of the present application, the thickness of the base layer comprises 0.5 mm, 1.0 mm and 1.5 mm.

[0009] In a preferred embodiment of the present invention, the crosslinking agent in the adhesive layer is hydrogen-based silicone oil, and its addition amount accounts for 0.95% to 1.05% of the total mass of the adhesive layer.

[0010] In a preferred embodiment of the present invention, the silane coupling agent used in the adhesive layer is a special primer, which is adapted to the surface of powder-coated steel plates, aluminum materials and composite plate materials.

[0011] A low-temperature construction method for VHB tape used in elevator structural components includes the following steps: pre-curing the tape after it has been applied in a low-temperature construction environment, wherein the pre-curing conditions are 50°C for 10 minutes.

[0012] The beneficial effects of the present invention are: the present invention provides a VHB tape for elevator structural components and a low-temperature construction method thereof. This method improves the original material and optimizes construction in low-temperature environments, thus solving the problems existing in the traditional VHB tape. Attached Figure Description

[0013] Figure 1 This is a structural schematic diagram of VHB tape used in elevator structural components.

[0014] The components in the attached diagram are labeled as follows: 1. Substrate layer; 2. Adhesive layer; 3. Release layer. Detailed Implementation

[0015] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0016] like Figure 1 As shown, a VHB tape for elevator structural components includes a base layer 1, an adhesive layer 2, and a release layer 3. The base layer 1, the adhesive layer 2, and the release layer 3 are connected sequentially. The composition of the base layer 1, the adhesive layer 2, and the release layer 3 includes: The substrate layer 1 is composed of high-density polyacrylate foam, which has a closed-cell structure with a closed-cell rate of ≥95%, preventing water vapor penetration and corrosion of the metal substrate.

[0017] The matrix layer 1 has a density of 100~120kg / m³ and a compressive strength of ≥150kPa, while maintaining buffering and shock absorption characteristics to reduce vibration and noise during car operation.

[0018] The high-density polyacrylate foam contains a low-temperature modifier and an anti-aging additive. The low-temperature modifier is selected from at least one of dioctyl sebacate or silane modifier. In view of the winter construction needs of elevators, the addition of the low-temperature modifier can improve the flexibility and extrudability at -35℃.

[0019] The anti-aging additive is selected from at least one of hindered amine light stabilizers or benzotriazole ultraviolet absorbers, which can prolong the service life of the adhesive tape under ultraviolet light, so that the service life is ≥10 years.

[0020] The thickness of the base layer 1 includes 0.5 mm, 1.0 mm and 1.5 mm, and in the embodiment, the thickness of the base layer 1 is 1.0 mm, which balances the filling property and the strength.

[0021] The adhesive layer 2 is coated on at least one surface of the base layer 1, and the adhesive layer 2 contains an acrylate adhesive, a silane coupling agent and a crosslinking agent. The silane coupling agent used in the adhesive layer 2 is a special primer, which is used to adapt the surface of powder coated steel plate, aluminum material and composite plate material. The silane coupling agent enhances the interfacial bonding force.

[0022] The crosslinking agent in the adhesive layer 2 is hydrogen-based silicone oil, and the addition amount is 0.95% to 1.05% of the total mass of the adhesive layer 2, so that the shear strength of the adhesive tape at room temperature is ≥15 MPa, and the initial strength at-20℃ low temperature is maintained ≥80%.

[0023] The release layer 3 covers the outer surface of the adhesive layer 2, and the release layer 3 is a silicone oil release film, and the release force is ≤0.5 N / cm. The silicone oil release film can reduce the release resistance of the release film during construction and reduce the risk of electrostatic adsorption of dust.

[0024] A low-temperature construction method of VHB adhesive tape for elevator structural parts, the specific steps comprising: under the low-temperature construction environment, the adhesive tape after pasting is subjected to low-temperature pre-curing treatment, and the pre-curing condition is 50℃ for 10 minutes. Using this method, the initial curing time can be shortened to 5 minutes, and the construction progress of the adhesive tape due to low temperature is avoided.

[0025] Performance parameter table of VHB adhesive tape for elevator structural parts Special test on elevator scene: Dynamic load simulation: Apply 1000 times / min vibration (frequency 5-20 Hz) in the elevator car model to verify the creep and fatigue performance of the adhesive tape under long-term mechanical stress.

[0026] Sealing verification: Through water vapor transmission rate test (≤5 g / m²·24h), ensure that the bonded part is long-term waterproof and moisture-proof.

[0027] Compared with the prior art, the VHB adhesive tape for elevator structural members and the low-temperature construction method thereof solve the problems of the existing traditional VHB adhesive tape by improving the original material and optimizing the construction in a low-temperature environment.

[0028] In the description of the present application, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0029] The above description is only an embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A VHB tape for an elevator structural member, comprising a base layer, an adhesive layer, and a release layer, the base layer, the adhesive layer, and the release layer being connected in sequence, characterized in that: The composition of the base layer, the adhesive layer and the release layer comprises: The base layer is made of high-density polyacrylate foam, which is a closed-cell structure with a closed-cell rate of ≥95%, a density of 100-120 kg / m, and a compressive strength of ≥150 kPa; The adhesive layer is coated on at least one surface of the base layer, and the adhesive layer comprises an acrylate adhesive, a silane coupling agent and a crosslinking agent; The release layer covers the outer surface of the adhesive layer, and the release layer is a silicone oil release film with a peel force of ≤0.5 N / cm.

2. The VHB tape for an elevator structural member according to claim 1, characterized by The high-density polyacrylate foam is added with a low-temperature resistant modifier and an anti-aging additive, the low-temperature resistant modifier is selected from at least one of dioctyl sebacate or a silane modifier, and the anti-aging additive is selected from at least one of a hindered amine light stabilizer or a benzotriazole ultraviolet absorber.

3. The VHB tape for an elevator structural member according to claim 1, characterized by The thickness of the base layer includes 0.5 mm, 1.0 mm and 1.5 mm.

4. The VHB tape for an elevator structural member according to claim 1, characterized by The crosslinking agent in the adhesive layer is hydrogen-based silicone oil, and the addition amount is 0.95%-1.05% of the total mass of the adhesive layer.

5. The VHB tape for an elevator structural member according to claim 1, wherein The silane coupling agent used in the adhesive layer is a special primer, which is used to adapt the surface of powder coated steel plate, aluminum material and composite plate material.

6. A method of low temperature application of VHB tape to an elevator structural member as defined in claim 1, wherein, The specific steps include: in a low-temperature construction environment, the adhesive tape after pasting is subjected to low-temperature pre-curing treatment, and the pre-curing condition is 50℃ for 10 minutes.

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