Lightweight automobile Teflon adhesive tape with reinforced fibers

Abstract

The utility model discloses a light-weight Teflon adhesive tape with reinforced fibers for an automobile, which aims at solving the contradiction among the requirements of the existing adhesive tape for the automobile on strength, durability and light weight, and is formed by compounding a Teflon base material layer, a reinforced fiber layer, a Teflon coating and an adhesive layer, the high-strength and low-density reinforced fibers are embedded into the Teflon base material, so that the light weight characteristic is ensured, the tensile strength and the wear resistance of the Teflon base material are remarkably improved, and the requirements of modern automobiles on high-performance adhesive tape materials are met.

Description

Technical Field

[0001] This utility model relates to the field of automotive materials technology, specifically a lightweight Teflon tape for automobiles with reinforcing fibers, suitable for the automotive industry's demand for high-strength, durable, and lightweight materials. Background Technology

[0002] With the rapid development of the automotive industry, the requirements for lightweight, high strength, and durability of automotive components are increasing. Traditional automotive tapes often fall short in terms of strength and durability, making it difficult to meet the high-performance demands of modern automobiles. Teflon materials, due to their excellent high-temperature resistance, corrosion resistance, and non-stick properties, are widely used in the automotive industry. However, pure Teflon materials have relatively low strength, making it difficult to meet the high-strength requirements of automotive components. Therefore, how to improve the strength and durability of Teflon tapes while ensuring lightweighting has become a pressing problem for those skilled in the art. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art by providing a lightweight automotive Teflon tape with reinforcing fibers. By embedding high-strength, low-density reinforcing fibers into the Teflon substrate, the tensile strength and wear resistance of the tape are significantly improved, while maintaining its lightweight characteristics.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a lightweight automotive Teflon tape with reinforcing fibers, comprising a Teflon substrate layer, a reinforcing fiber layer, a Teflon coating, and an adhesive layer;

[0005] The Teflon substrate layer is made of polytetrafluoroethylene (PTFE) or modified Teflon material, with a thickness of 0.05-0.5 mm;

[0006] The reinforcing fiber layer is embedded in the Teflon substrate layer and is composed of high-strength, low-density fibers, accounting for 10-40% of the volume of the substrate layer, with a fiber diameter of 5-20 micrometers.

[0007] The Teflon coating is uniformly applied to the outer surface of the Teflon substrate layer and the reinforcing fiber layer, with a thickness of 5-50 micrometers and a surface roughness Ra≤0.5 micrometers;

[0008] The adhesive layer is disposed on the inner surface of the Teflon substrate layer, with a thickness of 0.01-0.1 mm and a peel strength ≥5 N / cm;

[0009] The tape has a total thickness of 0.1-1.0 mm, a tensile strength of 50-200 MPa, and an abrasion resistance of ≥1000 cycles (ASTM D4060 standard).

[0010] Preferably, the reinforcing fiber is aramid fiber or carbon fiber, with a single filament tensile strength ≥3000 MPa and a density ≤2.0 g / cm³.

[0011] Preferably, the reinforcing fiber layer is embedded in the Teflon substrate layer in a woven, non-woven, or oriented manner. The woven manner can enhance the bonding force between fibers and improve the overall strength of the tape; the non-woven manner can make the fiber distribution more uniform and improve the wear resistance of the tape; the oriented manner can adjust the fiber arrangement direction according to specific application requirements to optimize the mechanical properties of the tape.

[0012] Specifically, in the weaving method, fibers are woven into a mesh using plain, twill, or satin weaves; in the nonwoven method, fibers are randomly distributed and fixed by hot pressing or chemical bonding; in the directional arrangement method, fibers are arranged parallel along the length of the tape or in a specific stress direction.

[0013] Preferably, nano-silica or graphene particles are added to the Teflon coating at an amount of 1-5% of the coating mass to improve wear resistance and thermal conductivity.

[0014] Preferably, the adhesive layer is an acrylic, silicone, or rubber adhesive; wherein: acrylic adhesive: temperature resistance range -40℃ to 150℃; silicone adhesive: temperature resistance range -60℃ to 260℃; rubber adhesive: excellent oil resistance and flexibility, suitable for dynamic parts.

[0015] Preferably, the tape edge is provided with a tear-resistant reinforcing strip with a width of 1-3 mm, made of aramid fiber or polyester fiber, to effectively prevent the tape edge from tearing.

[0016] Preferably, the tear-resistant reinforcing strip is bonded to the Teflon substrate layer by hot pressing or ultrasonic welding, with a bonding strength ≥10 N / mm.

[0017] Preferably, the tape surface is printed with a high-temperature resistant marking layer, using Teflon-compatible ink, and the marking temperature resistance is ≥200℃.

[0018] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0019] This invention employs a precision composite process to uniformly coat a Teflon coating onto a substrate containing reinforcing fibers. Utilizing the high strength properties of the reinforcing fibers, it effectively resists external stress and wear, extending the service life of the tape. At the same time, the selected reinforcing fibers have low density characteristics, ensuring the overall lightweight nature of the tape, which aligns with the trend of lightweight automotive design. Attached Figure Description

[0020] The technical solution of this utility model will be further described below with reference to the accompanying drawings:

[0021] Appendix Figure 1 This is a diagram showing the layer distribution of the lightweight automotive Teflon tape with reinforcing fibers described in this utility model.

[0022] Appendix Figure 2 This is a schematic diagram of the present invention after the tear-resistant reinforcing strip has been added.

[0023] The structure includes: 1. Teflon substrate layer; 2. Reinforcing fiber layer; 3. Teflon coating; 4. Adhesive layer; 5. Tear-resistant reinforcing strip. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] Appendix Figure 1-2 The lightweight automotive Teflon tape with reinforcing fibers described in this utility model comprises a Teflon substrate layer 1, a reinforcing fiber layer 2, a Teflon coating layer 3, and an adhesive layer 4.

[0026] The Teflon substrate layer 1 is made of Teflon material through extrusion or calendering processes to form a substrate layer with a thickness of 0.05-0.5 mm.

[0027] The reinforcing fiber layer 2: Aramid fibers or carbon fibers are embedded in the Teflon substrate layer 1 in a woven, non-woven, or oriented manner, accounting for 10-40% of the volume of the substrate layer, with a fiber diameter of 5-20 micrometers and a thickness of 0.02-0.2 millimeters;

[0028] The Teflon coating 3 is applied uniformly to the outer surface of the Teflon substrate layer 1 and the reinforcing fiber layer 2 using a precision coating process. The coating thickness is 5-50 micrometers, which ensures the integrity and continuity of the coating while avoiding the increase in weight and cost caused by excessive coating thickness. The Teflon coating 3 gives the tape non-stick, high temperature resistance, and corrosion resistance, enabling it to maintain stable performance in various environments.

[0029] The adhesive layer 4: An acrylic, silicone, or rubber adhesive is applied to the inner surface of the Teflon substrate layer 1, with a thickness of 0.01-0.1 mm and a peel strength ≥5 N / cm, for attaching tape to automotive parts;

[0030] The tape has a total thickness of 0.1-1.0 mm, a tensile strength of 50-200 MPa, and an abrasion resistance of ≥1000 cycles (ASTM D4060 standard).

[0031] Specific preparation process:

[0032] Teflon substrate layer

[0033] Materials: Use suspension polymerized PTFE powder (particle size 10-50 μm), or add 5-10% melt-processable Teflon modified resin (such as PFA).

[0034] Preparation: The resin powder and the reinforcing fiber prepreg are laminated and then molded (pressure 10-15 MPa, temperature 360-380℃).

[0035] Reinforcing fiber layer

[0036] Fiber selection:

[0037] Aramid fiber (Kevlar® 49): density 1.44 g / cm³, tensile strength 3620 MPa;

[0038] Carbon fiber (T300 grade): density 1.76 g / cm³, tensile strength 3530 MPa;

[0039] Preparation: The fiber surface is treated with plasma or coated with a silane coupling agent to enhance the interfacial bonding strength with Teflon.

[0040] Teflon coating

[0041] Formulation: 2% nano silica (particle size 20-40 nm) is added to PTFE emulsion (60% solid content), and then coated after high-speed dispersion;

[0042] Process: A micro-gravure coating machine with a mesh count of 200-400 and a coating speed of 0.5 m / min is used. The coating is then sintered at 380℃ to form a dense coating.

[0043] Adhesive layer

[0044] High-temperature type: Silicone resin (such as Dow Corning® 735) with 5% alumina filler, temperature resistance up to 260℃;

[0045] High-tack type: Acrylic adhesive (3M™ 300LSE) with added microsphere foaming agent, reducing thickness by 20% while maintaining peel strength ≥8 N / cm.

[0046] Verification was achieved through comparative experiments:

[0047]

[0048] Example 1

[0049] Teflon substrate layer 1: 0.3 mm thick PTFE molded plate, embedded with T300 carbon fiber woven mesh (warp and weft density 12×12 threads / cm).

[0050] Teflon coating 3: Teflon coating 3 containing 3% nano-silica, with a thickness of 30 μm;

[0051] Adhesive layer 4: Silicone adhesive resistant to 260℃, 0.05 mm thick;

[0052] Performance: Tensile strength 178 MPa, wear resistance 5000 cycles, total thickness 0.38 mm, suitable for high-temperature areas in engine compartments.

[0053] Example 2

[0054] Teflon substrate layer 1: 0.2 mm modified PFA layer containing oriented Kevlar fibers (25% by volume).

[0055] Tear-resistant reinforcing strip 5: A 1.5 mm wide polyester fiber strip, bonded to the Teflon substrate layer 1 by ultrasonic welding;

[0056] Teflon coating 3: Graphene-modified Teflon coating 3 (1% addition), thickness 15 μm;

[0057] Adhesive layer 4: Foamed acrylic adhesive, 0.08 mm thick;

[0058] Performance: Edge tear strength 22 N / mm, density 1.72 g / cm³, suitable for shockproof application to car doors.

[0059] This invention achieves breakthroughs in lightweight (15-30% weight reduction), high strength (5-8 times increase), and long life (4-5 times increase in wear resistance) of automotive tapes through the directional composite of reinforcing fibers, the synergistic design of nano-modified coatings, and the innovative structure of tear-resistant reinforcing strips. It can be widely used in high-performance application scenarios of new energy vehicles, high-end passenger vehicles, and special vehicles.

[0060] The above are merely specific application examples of this utility model and do not constitute any limitation on the scope of protection of this utility model. All technical solutions formed by equivalent transformations or equivalent substitutions fall within the scope of protection of this utility model.

Claims

1. A lightweight automotive Teflon tape with reinforcing fibers, characterized by: The adhesive tape comprises a Teflon base layer, a reinforcing fiber layer, a Teflon coating layer and an adhesive layer. The reinforcing fiber layer is embedded in the Teflon base layer and is composed of high-strength and low-density fibers, accounting for 10-40% of the volume of the base layer. The Teflon coating layer is uniformly coated on the outer surface of the Teflon base layer and the reinforcing fiber layer. The adhesive layer is arranged on the inner surface of the Teflon base layer.

2. The Teflon tape with reinforcing fibers for light-weight automobiles according to claim 1, characterized by: The reinforcing fiber is aramid fiber or carbon fiber, and the fiber diameter is 5-20 microns.

3. The Teflon tape with reinforcing fibers for light-weight automobiles according to claim 1 or 2, characterized by: The reinforcing fiber layer is embedded in the Teflon base layer in the form of weaving, non-woven fabric or directional arrangement.

4. The Teflon tape with reinforcing fibers for light-weight automobiles according to claim 1, characterized by: The Teflon coating layer is uniformly coated by a precision coating process, and the coating thickness is 5-50 microns.

5. The Teflon tape with reinforcing fibers for light-weight automobiles according to claim 1, characterized by: The adhesive layer is an acrylic, silicone or rubber adhesive.

6. The Teflon tape with reinforcing fibers for light-weight automobiles according to claim 1, characterized by: The edge of the adhesive tape is provided with a tear-resistant reinforcing tape with a width of 1-3 mm, which is made of aramid fiber or polyester fiber.

7. The Teflon tape with reinforcing fibers for light-weight automobiles according to claim 1, characterized by: The surface of the adhesive tape is printed with a high-temperature-resistant identification layer, which uses Teflon compatible ink.

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