High-flexibility FEP (fluorinated ethylene propylene) heat shrink tube

Abstract

The utility model discloses a high-flexibility FEP (fluorinated ethylene propylene) heat-shrinkable tube, which belongs to the field of FEP heat-shrinkable tubes and comprises an FEP heat-shrinkable tube base layer, an inner adding layer is arranged on the inner wall of the FEP heat-shrinkable tube base layer and consists of a thermoplastic polyurethane layer and an epoxy resin layer, an outer adding layer is arranged on the outer wall of the FEP heat-shrinkable tube base layer and consists of a thermoplastic polyurethane layer and an epoxy resin layer, and an outer adding layer is arranged on the outer wall of the FEP heat-shrinkable tube base layer and consists of a thermoplastic polyurethane layer and an epoxy resin layer. The outer adding layer is composed of a thermoplastic elastomer layer, a polytetrafluoroethylene layer and a nylon layer, the epoxy resin layer on the inner adding layer is arranged on the inner wall of the thermoplastic polyurethane layer, the thermoplastic polyurethane layer and the epoxy resin layer are fixedly connected, the thermoplastic polyurethane layer on the inner adding layer is arranged on the inner wall of the FEP heat shrink tube base layer, and the FEP heat shrink tube base layer is fixedly connected with the epoxy resin layer. The FEP heat shrink tube has the advantages that the FEP heat shrink tube base layer is provided with the thermoplastic polyurethane layer, the thermoplastic polyurethane layer is fixedly connected with the FEP heat shrink tube base layer, and the FEP heat shrink tube base layer is provided with the inner adding layer and the outer adding layer, so that the heat shrink tube has high flexibility, and the adaptability, the flexibility and the protection effect of the heat shrink tube can be improved.

Description

Technical Field

[0001] The utility model relates to the field of FEP heat shrinkable tubes, and particularly relates to a high-stretchability FEP heat shrinkable tube. Background Art

[0002] An FEP heat shrinkable tube is a high-performance heat shrinkable protective sleeve made of a copolymer of vinylidene fluoride and hexafluoropropylene. It can be applied to applications that come into contact with food and package food, as well as the protection of filling and inspection equipment. At the same time, it can be used as an insulating protective sleeve for wires and cables, the protection of sensitive electronic components, the sealing of terminals and connectors, etc., and can also be used for the sealing of corrosion-resistant and strong acid and strong alkali-resistant equipment and the protection of chemical solvent transportation pipelines. With the improvement of people's usage requirements, the stretchability of traditional FEP heat shrinkable tubes is difficult to meet people's growing usage needs. Therefore, a high-stretchability FEP heat shrinkable tube is needed to improve the adaptability, flexibility, and protection effect of FEP heat shrinkable tubes. Summary of the Utility Model

[0003] The main purpose of the utility model is to provide a high-stretchability FEP heat shrinkable tube, which can effectively solve the problems in the background art.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A high-stretchability FEP heat shrinkable tube includes an FEP heat shrinkable tube base layer. An inner additive layer is provided on the inner wall of the FEP heat shrinkable tube base layer. The inner additive layer is composed of a thermoplastic polyurethane layer and an epoxy resin layer. An outer additive layer is provided on the outer wall of the FEP heat shrinkable tube base layer. The outer additive layer is composed of a thermoplastic elastomer layer, a polytetrafluoroethylene layer, and a nylon layer.

[0006] Preferably, the epoxy resin layer on the inner additive layer is provided on the inner wall of the thermoplastic polyurethane layer, and the thermoplastic polyurethane layer and the epoxy resin layer are fixedly connected.

[0007] Preferably, the thermoplastic polyurethane layer on the inner additive layer is provided on the inner wall of the FEP heat shrinkable tube base layer, and the thermoplastic polyurethane layer and the FEP heat shrinkable tube base layer are fixedly connected.

[0008] Preferably, the polytetrafluoroethylene layer on the outer additive layer is provided on the outer wall of the thermoplastic elastomer layer, and the thermoplastic elastomer layer and the polytetrafluoroethylene layer are fixedly connected.

[0009] Preferably, the nylon layer on the outer additive layer is provided on the outer wall of the polytetrafluoroethylene layer, and the polytetrafluoroethylene layer and the nylon layer are fixedly connected.

[0010] Preferably, the thermoplastic elastomer layer on the outer additive layer is disposed on the outer wall of the FEP heat-shrinkable tube base layer, and the thermoplastic elastomer layer and the FEP heat-shrinkable tube base layer are fixedly connected.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] By providing an inner additive layer and an outer additive layer on the FEP heat-shrinkable tube base layer, the thermoplastic polyurethane layer on the inner additive layer and the thermoplastic elastomer layer on the outer additive layer are elastic layers, which can provide additional stretchability and flexibility. This can be achieved through co-extrusion, enabling the thermoplastic polyurethane layer, the thermoplastic elastomer layer to be tightly combined with the FEP heat-shrinkable tube base layer, thereby providing greater deformation ability during heat shrinkage; the epoxy resin layer on the inner additive layer and the polytetrafluoroethylene layer on the outer additive layer are anti-corrosion layers. Although they do not directly enhance the stretchability themselves, they can protect the FEP heat-shrinkable tube base layer from the influence of corrosive environments, thus extending the service life of the heat-shrinkable tube and maintaining its original physical properties, including a certain degree of stretchability. In harsh environments, this can maintain the integrity of the FEP heat-shrinkable tube base layer and prevent it from becoming hard or brittle due to corrosion, thereby affecting the stretchability; the nylon layer on the outer additive layer is a wear-resistant layer, which can improve the wear resistance of the heat-shrinkable tube and reduce the risk of damage due to friction during use. This helps to maintain the integrity of the heat-shrinkable tube and indirectly supports its long-term maintenance of a certain degree of stretchability, ultimately enhancing the adaptability, flexibility, and protection effect of the heat-shrinkable tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 is a sectional view of the utility model;

[0015] Figure 3 is a schematic diagram of the structure of the FEP heat-shrinkable tube base layer and the outer additive layer of the utility model;

[0016] Figure 4 is a schematic diagram of the structure of the FEP heat-shrinkable tube base layer and the inner additive layer of the utility model.

[0017] In the figure: 1, FEP heat-shrinkable tube base layer; 2, inner additive layer; 3, outer additive layer; 4, thermoplastic polyurethane layer; 5, epoxy resin layer; 6, thermoplastic elastomer layer; 7, polytetrafluoroethylene layer; 8, nylon layer. DETAILED DESCRIPTION OF THE INVENTION

[0018] In order to make the technical means, creative features, achieving purposes, and functions of the utility model easy to understand, the utility model will be further described below in conjunction with specific embodiments.

[0019] Please refer to Figure 1, Figure 2 , Figure 3 , Figure 4 As shown in Figure 2 , Figure 3 , and Figure 4 , a highly stretchable FEP heat-shrinkable tube includes an FEP heat-shrinkable tube base layer 1. An inner additive layer 2 is provided on the inner wall of the FEP heat-shrinkable tube base layer 1. The inner additive layer 2 is composed of a thermoplastic polyurethane layer 4 and an epoxy resin layer 5. An outer additive layer 3 is provided on the outer wall of the FEP heat-shrinkable tube base layer 1. The outer additive layer 3 is composed of a thermoplastic elastomer layer 6, a polytetrafluoroethylene layer 7, and a nylon layer 8. The thermoplastic polyurethane layer 4 on the inner additive layer 2 and the thermoplastic elastomer layer 6 on the outer additive layer 3 are elastic layers, which can provide additional stretchability and flexibility. This can be achieved by co-extrusion, enabling the thermoplastic polyurethane layer 4 and the thermoplastic elastomer layer 6 to be tightly bonded to the FEP heat-shrinkable tube base layer 1, thereby providing greater deformation ability during heat shrinkage. The epoxy resin layer 5 on the inner additive layer 2 and the polytetrafluoroethylene layer 7 on the outer additive layer 3 are anti-corrosion layers. Although they do not directly enhance the stretchability themselves, they can protect the FEP heat-shrinkable tube base layer 1 from the influence of corrosive environments, thereby extending the service life of the heat-shrinkable tube and maintaining its original physical properties, including a certain degree of stretchability. In harsh environments, this can maintain the integrity of the FEP heat-shrinkable tube base layer 1 and prevent it from becoming hard or brittle due to corrosion, thus affecting the stretchability. The nylon layer 8 on the outer additive layer 3 is a wear-resistant layer, which can enhance the wear resistance of the heat-shrinkable tube and reduce the risk of damage caused by friction during use. This helps to maintain the integrity of the heat-shrinkable tube and indirectly supports its long-term maintenance of a certain degree of stretchability.

[0020] Furthermore, the epoxy resin layer 5 on the inner additive layer 2 is provided on the inner wall of the thermoplastic polyurethane layer 4, and the thermoplastic polyurethane layer 4 and the epoxy resin layer 5 are fixedly connected. The thermoplastic polyurethane layer 4 on the inner additive layer 2 is provided on the inner wall of the FEP heat-shrinkable tube base layer 1, and the thermoplastic polyurethane layer 4 and the FEP heat-shrinkable tube base layer 1 are fixedly connected. The thermoplastic polyurethane layer 4 is an elastic material with excellent wear resistance, oil resistance, and chemical corrosion resistance. It has good elasticity and can maintain stable performance within a wide temperature range. The epoxy resin layer 5 is a thermosetting resin with excellent corrosion resistance and mechanical properties. It can serve as an anti-corrosion layer for the FEP heat-shrinkable tube base layer 1, providing additional protection.

[0021] Further, the polytetrafluoroethylene layer 7 on the outer additive layer 3 is disposed on the outer wall of the thermoplastic elastomer layer 6, and the thermoplastic elastomer layer 6 and the polytetrafluoroethylene layer 7 are fixedly connected. The nylon layer 8 on the outer additive layer 3 is disposed on the outer wall of the polytetrafluoroethylene layer 7, and the polytetrafluoroethylene layer 7 and the nylon layer 8 are fixedly connected. The thermoplastic elastomer layer 6 on the outer additive layer 3 is disposed on the outer wall of the FEP heat shrinkable tube base layer 1, and the thermoplastic elastomer layer 6 and the FEP heat shrinkable tube base layer 1 are fixedly connected. The thermoplastic elastomer layer 6 is a thermoplastic soft rubber material with rubber elasticity and does not require vulcanization, and can be directly extruded and formed. It combines the characteristics of rubber and thermoplastic plastics, having both the elasticity of rubber and the processability of plastics. Taking the thermoplastic elastomer layer 6 as the elastic layer can provide additional stretchability and flexibility on the FEP heat shrinkable tube base layer 1. The polytetrafluoroethylene layer 7 is a material with extremely high corrosion resistance and also has excellent high temperature resistance. Taking the polytetrafluoroethylene layer 7 as the anti-corrosion layer of the FEP heat shrinkable tube base layer 1 can further enhance its ability to resist chemical corrosion. The nylon layer 8 is a high-strength and high-wear-resistant engineering plastic with excellent wear resistance and impact resistance. Taking the nylon layer 8 as the wear-resistant layer of the FEP heat shrinkable tube base layer 1 can significantly enhance its ability to resist wear and scratches.

[0022] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The protection scope claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A highly elastic FEP heat shrinkable tube, comprising a FEP heat shrinkable tube base layer (1), characterized in that: An inner additive layer (2) is arranged on the inner wall of the FEP heat shrinkable tube base layer (1), and the inner additive layer (2) is composed of a thermoplastic polyurethane layer (4) and an epoxy resin layer (5). An outer additive layer (3) is arranged on the outer wall of the FEP heat shrinkable tube base layer (1), and the outer additive layer (3) is composed of a thermoplastic elastomer layer (6), a polytetrafluoroethylene layer (7) and a nylon layer (8).

2. The highly elastic FEP heat shrinkable tube according to claim 1, characterized in that: The epoxy resin layer (5) on the inner added layer (2) is arranged on the inner wall of the thermoplastic polyurethane layer (4), and the thermoplastic polyurethane layer (4) and the epoxy resin layer (5) are fixedly connected.

3. The highly elastic FEP heat shrinkable tube according to claim 2, characterized in that: The thermoplastic polyurethane layer (4) on the inner added layer (2) is arranged on the inner wall of the FEP heat shrink tube base layer (1), and the thermoplastic polyurethane layer (4) and the FEP heat shrink tube base layer (1) are fixedly connected.

4. The highly elastic FEP heat shrinkable tube according to claim 3, characterized in that: The polytetrafluoroethylene layer (7) on the external added layer (3) is arranged on the outer wall of the thermoplastic elastomer layer (6), and the thermoplastic elastomer layer (6) and the polytetrafluoroethylene layer (7) are fixedly connected.

5. The highly elastic FEP heat shrinkable tube according to claim 4, characterized in that: The nylon layer (8) on the external added layer (3) is arranged on the outer wall of the polytetrafluoroethylene layer (7), and the polytetrafluoroethylene layer (7) and the nylon layer (8) are fixedly connected.

6. The highly elastic FEP heat shrinkable tube according to claim 5, characterized in that: The thermoplastic elastomer layer (6) on the external added layer (3) is arranged on the outer wall of the FEP heat shrinkable tube base layer (1), and the thermoplastic elastomer layer (6) and the FEP heat shrinkable tube base layer (1) are fixedly connected.

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