An enhanced edge seal teflon tape structure

Abstract

The utility model relates to a kind of enhanced edge sealing teflon adhesive tape structure, include non-active PTFE film, first fluorine rubber being arranged in non-active PTFE film layer lower layer, active PTFE film being arranged in first fluorine rubber lower layer, second fluorine rubber being arranged in active PTFE film lower layer, viscose layer being arranged in second fluorine rubber lower layer;The first fluorine rubber and active PTFE film are mutually staggered and set multiple layers;So first fluorine rubber and second fluorine rubber overflow after heat pressing to form ladder with non-active PTFE film layer and active PTFE film;First fluorine rubber and second fluorine rubber overflow end are smeared with bisphenol AF for vulcanization;The utility model forms ladder overflow glue by active PTFE film and fluorine rubber superposition heat pressing Form mechanical anchoring effect, lock interfacial, block edge permeation path, and bisphenol AF is in edge local crosslinking fluorine rubber, form the "sealing frame" of high crosslinking density, so as to can significantly improve edge sealing reliability.

Description

Technical Field

[0001] This utility model relates to the field of Teflon tape structure, and specifically to an enhanced edge-sealing Teflon tape structure. Background Technology

[0002] Teflon tape has a smooth surface, excellent anti-sticking properties, chemical corrosion resistance, high temperature resistance, and superior insulation performance. It is widely used in packaging, thermoplastics, composites, sealing heat sealing, electronics, and other industries. It is suitable for bonding any parts requiring anti-sticking, heat sealing, corrosion resistance, and insulation, and can be repeatedly applied. Fabric-reinforced Teflon tape offers even higher strength and can be used in sizing machine rollers, thermoplastic demolding, and other applications. It is reusable and easy to replace.

[0003] Existing Teflon tapes have poor edge sealing, which affects their service life. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art by providing an enhanced edge-sealing Teflon tape structure.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an enhanced edge-sealing Teflon tape structure, comprising a non-reactive PTFE membrane, a first fluororubber disposed under the non-reactive PTFE membrane layer, an active PTFE membrane disposed under the first fluororubber, a second fluororubber disposed under the active PTFE membrane, and an adhesive layer disposed under the second fluororubber; the first fluororubber and the active PTFE membrane are interleaved in multiple layers; therefore, after hot pressing, the first fluororubber and the second fluororubber overflow, thus forming a stepped structure with the non-reactive PTFE membrane layer and the active PTFE membrane; the sides of the first fluororubber and the second fluororubber that form the stepped structure with the non-reactive PTFE membrane layer and the active PTFE membrane are coated with bisphenol AF for vulcanization.

[0006] Preferably, the fluororubber surface of the first fluororubber is coated with an acid absorbent.

[0007] Preferably, the fluororubber surface of the second fluororubber is provided with a plurality of semi-circular protrusions.

[0008] Preferably, the adhesive layer is silicone adhesive.

[0009] Preferably, the fluororubber, the non-active PTFE membrane layer, and the active PTFE membrane are filled with mixed resin in the stepped grooves on both sides after vulcanization.

[0010] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0011] This invention utilizes the hot pressing of an active PTFE membrane and fluororubber to form a stepped overflow adhesive, creating a mechanical anchoring effect that locks the interlayer interface, blocks edge penetration paths, and allows bisphenol AF to locally crosslink the fluororubber at the edges, forming a highly crosslinked "sealing frame," thereby significantly improving the reliability of edge sealing. Attached Figure Description

[0012] The technical solution of this utility model will be further described below with reference to the accompanying drawings:

[0013] Appendix Figure 1 This is a schematic cross-sectional view of the enhanced edge-sealing Teflon tape structure described in this utility model.

[0014] The components are: 1. Inactive PTFE membrane; 2. First fluororubber; 3. Active PTFE membrane; 4. Second fluororubber; 5. Adhesive layer; 6. Acid absorbent; 7. Semi-circular bump; 8. Mixed resin. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] Appendix Figure 1 The reinforced edge-sealing Teflon tape structure of this utility model includes an inactive PTFE membrane 31, a first fluororubber 2 disposed under the inactive PTFE membrane 31, an active PTFE membrane 3 disposed under the first fluororubber 2, a second fluororubber 4 disposed under the active PTFE membrane 3, and an adhesive layer 5 disposed under the second fluororubber 4; the first fluororubber 2 and the active PTFE membrane 3 are interleaved in multiple layers; therefore, the first fluororubber 2 and the second fluororubber 4 overflow after hot pressing, thus forming a stepped structure with the inactive PTFE membrane 31 and the active PTFE membrane 3; the sides of the first fluororubber 2 and the second fluororubber 4 forming the stepped structure with the inactive PTFE membrane 31 and the active PTFE membrane 3 are coated with bisphenol AF for vulcanization.

[0017] Furthermore, the fluororubber surface of the first fluororubber 2 is coated with an acid absorber 6 to ensure that the vulcanizing agent completes the crosslinking reaction efficiently.

[0018] Furthermore, the fluororubber surface of the second fluororubber 4 is provided with a plurality of semi-circular protrusions 7.

[0019] Furthermore, the adhesive layer 5 is a silicone adhesive used for bonding.

[0020] Furthermore, the fluororubber, the non-active PTFE membrane 31 layer, and the active PTFE membrane 3 are filled with mixed resin in the stepped grooves on both sides after vulcanization, which improves the peel strength.

[0021] In use: The active PTFE membrane 3 is stacked with the first fluororubber 2 and the second fluororubber 4. During hot pressing, the rubber material of the first fluororubber 2 and the second fluororubber 4 overflows in a controlled manner, forming a multi-layered stepped profile. The hot pressing temperature activates the rubber material, realizing molecular-level bonding between materials and significantly improving the anti-delamination strength. Bisphenol AF is coated on the overflowed fluororubber material. Bisphenol AF acts as a crosslinking agent to form a dense three-dimensional network in the edge area, significantly enhancing the interaction force between fluororubber molecular chains. This makes the crosslinking density in the edge area higher than that of the bulk material, effectively blocking the medium penetration path. The highly crosslinked structure at the edge buffers the difference in thermal expansion coefficients between the PTFE membrane and the first fluororubber 2 and the second fluororubber 4, reducing warping deformation caused by thermal cycling, thereby significantly improving the sealing performance of the tape edge.

[0022] 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 reinforced edge-sealing Teflon tape structure, characterized in that: The material comprises an inactive PTFE membrane, a first fluororubber layer disposed beneath the inactive PTFE membrane layer, an active PTFE membrane layer disposed beneath the first fluororubber layer, a second fluororubber layer disposed beneath the active PTFE membrane layer, and an adhesive layer disposed beneath the second fluororubber layer. Multiple layers of the first fluororubber and the active PTFE membrane are interleaved. Therefore, after hot pressing, the first and second fluororubber overflow, forming a stepped structure with the inactive and active PTFE membrane layers. The sides of the first and second fluororubber layers forming the stepped structure with the inactive and active PTFE membrane layers are coated with bisphenol AF for vulcanization.

2. The reinforced edge-sealing Teflon tape structure according to claim 1, characterized in that: The fluororubber surface of the first fluororubber is coated with an acid absorbent.

3. The reinforced edge-sealing Teflon tape structure according to claim 1, characterized in that: The second fluororubber has a plurality of semi-circular protrusions on its fluororubber surface.

4. The reinforced edge-sealing Teflon tape structure according to claim 1, characterized in that: The adhesive layer is silicone adhesive.

5. The reinforced edge-sealing Teflon tape structure according to claim 1, characterized in that: The fluororubber, the non-active PTFE membrane layer, and the active PTFE membrane are filled with mixed resin in the stepped grooves on both sides after vulcanization.

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