High-elasticity polytetrafluoroethylene hose

Abstract

The utility model discloses a high-elasticity polytetrafluoroethylene hose, and belongs to polytetrafluoroethylene tubes. The high-elasticity polytetrafluoroethylene hose comprises a first pure polytetrafluoroethylene hose body, the outer layer of the pure polytetrafluoroethylene hose body is covered with a first polytetrafluoroethylene fiber layer, the outer layer of the first polytetrafluoroethylene fiber layer is covered with an expanded polytetrafluoroethylene layer, and the outer layer of the expanded polytetrafluoroethylene layer is covered with a second polytetrafluoroethylene fiber layer. The outer layer of the second polytetrafluoroethylene fiber layer is sleeved with a second pure polytetrafluoroethylene pipe body. In addition to corrosion resistance, electrical insulation, temperature resistance and the like, the cable also has the advantages of higher elasticity, lower bending strength, smaller bending curvature radius, smooth inner wall, small resistance and the like.

Description

Technical Field

[0001] The utility model relates to the field of polytetrafluoroethylene tubes, in particular to a high-elasticity polytetrafluoroethylene hose. Background Art

[0002] Pure PTFE offers excellent corrosion resistance, electrical insulation, low surface energy, and high pressure-bearing capacity, allowing for extensive and long-term use in operating conditions ranging from -60°C to 230°C. However, conventional pure PTFE tubing has poor bending properties, with a curvature radius typically exceeding five times the tube diameter, making it difficult to use in applications requiring bending.

[0003] Expanded polytetrafluoroethylene is a microporous breathable material that is soft and has a small bending radius, but it cannot bear pressure and cannot insulate.

[0004] In the use of existing industrial endoscopy equipment, due to the complex environment structure during the inspection of equipment and pipelines, especially the existence of small curvature corners, the equipped pipelines need to meet the requirements of being soft, adaptable to small corners in the environment, corrosion-resistant, temperature-resistant, and insulated.

[0005] When using medical endoscopy equipment to perform internal examinations on the human body, the hose entering the body cavity needs to meet the requirements of being soft, having a small corner curvature radius, made of medical-grade material, and resistant to chemicals and temperature.

[0006] In the use of microfluidics and micro-sized special instruments, the pipes need to be able to bend freely without losing stability, and at the same time they need to have high cleanliness and low resistance.

[0007] Therefore, there is an urgent need for a highly elastic polytetrafluoroethylene hose that can simultaneously meet the use requirements of industrial endoscopy equipment, medical endoscopy equipment, and microfluidics and micro-size special instruments. Utility Model Content

[0008] In order to solve the above technical problems, the utility model provides a high-elasticity polytetrafluoroethylene hose, which, in addition to having the properties of corrosion resistance, electrical insulation, and temperature resistance, also has the advantages of high elasticity, low bending strength (softness), small bending radius, smooth inner wall, and low resistance.

[0009] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0010] The high-elasticity polytetrafluoroethylene hose comprises a first pure polytetrafluoroethylene tube body, the outer layer of the pure polytetrafluoroethylene tube body is covered with a first polytetrafluoroethylene fiber layer, the outer layer of the first polytetrafluoroethylene fiber layer is covered with an expanded polytetrafluoroethylene layer, the outer layer of the expanded polytetrafluoroethylene layer is covered with a second polytetrafluoroethylene fiber layer, and the outer layer of the second polytetrafluoroethylene fiber layer is covered with a second pure polytetrafluoroethylene tube body.

[0011] According to a further technical solution, the thickness of the expanded polytetrafluoroethylene layer is greater than the thickness of the first pure polytetrafluoroethylene tube, the first polytetrafluoroethylene fiber layer, and the second polytetrafluoroethylene fiber layer.

[0012] According to a further technical solution, the thickness of the second pure polytetrafluoroethylene tube is greater than or equal to the thickness of the second polytetrafluoroethylene fiber layer.

[0013] According to a further technical solution, the thickness of the first polytetrafluoroethylene fiber layer is greater than the thickness of the second polytetrafluoroethylene fiber layer. Beneficial effects

[0014] Compared with the prior art, the present invention has the following significant advantages:

[0015] 1. The high elastic polytetrafluoroethylene hose of the utility model has the properties of corrosion resistance, electrical insulation performance, high pressure bearing capacity, high resilience, extremely small bending radius, low bending strength (softness), temperature resistance, low surface energy, etc.

[0016] 2. This utility model can simultaneously meet the hose needs of industrial endoscopy equipment, medical endoscopy equipment, microfluidic special instruments, etc. The inner and outer tubes are both pure polytetrafluoroethylene tubes, which are biocompatible and meet the special use requirements of medical endoscopy equipment. At the same time, it has the advantages of small bending radius, chemical resistance, high electrical insulation, low fluid flow resistance, temperature resistance (can be used for a long time under working conditions of -60℃~230℃), high cleanliness, and no scaling.

[0017] 3. The inner wall of the first pure polytetrafluoroethylene tube and the outer wall of the second pure polytetrafluoroethylene tube of the utility model have smooth wall surfaces and no fluid scaling, which can further reduce fluid flow resistance; and have pressure bearing, no leakage, and electrical insulation of more than 10KV.

[0018] 4. The utility model solves the problem of strength and flexibility of the interface between polytetrafluoroethylene and expanded polytetrafluoroethylene by arranging a polytetrafluoroethylene fiber layer between the pure polytetrafluoroethylene layer and the expanded polytetrafluoroethylene layer, so that the hose can withstand multiple bending with a small curvature radius, greatly extending its service life.

[0019] 5. The utility model provides an expanded polytetrafluoroethylene layer to make the hose elastic, low in bending strength, soft and with a curvature radius less than 4 times the pipe diameter. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the utility model;

[0021] Labels in the figure: 1-first pure polytetrafluoroethylene tube body, 2-first polytetrafluoroethylene fiber layer, 3-expanded polytetrafluoroethylene layer, 4-second polytetrafluoroethylene fiber layer, 5-second pure polytetrafluoroethylene tube body. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Example

[0023] like Figure 1 As shown, the high-elasticity polytetrafluoroethylene hose includes a first pure polytetrafluoroethylene tube body 1, the outer layer of the pure polytetrafluoroethylene tube body 1 is covered with a first polytetrafluoroethylene fiber layer 2, the outer layer of the first polytetrafluoroethylene fiber layer 2 is covered with an expanded polytetrafluoroethylene layer 3, the outer layer of the expanded polytetrafluoroethylene layer 3 is covered with a second polytetrafluoroethylene fiber layer 4, and the outer layer of the second polytetrafluoroethylene fiber layer 4 is covered with a second pure polytetrafluoroethylene tube body 5.

[0024] The thickness of the expanded polytetrafluoroethylene layer 3 is greater than the thickness of the first pure polytetrafluoroethylene tube 1 , the first polytetrafluoroethylene fiber layer 2 , and the second polytetrafluoroethylene fiber layer 4 .

[0025] The thickness of the second pure polytetrafluoroethylene tube 5 is greater than or equal to the thickness of the second polytetrafluoroethylene fiber layer 4 .

[0026] The thickness of the first polytetrafluoroethylene fiber layer 2 is greater than the thickness of the second polytetrafluoroethylene fiber layer 4 .

[0027] This new hose features pure PTFE tubing on both the inner and outer layers, ensuring corrosion resistance, electrical insulation, high pressure bearing capacity, heat resistance, and low surface energy on both the inner and outer contact surfaces. Furthermore, by interposing a PTFE fiber layer and an expanded PTFE layer between the two pure PTFE tubing bodies, the hose exhibits high resilience, a very small bending radius, and excellent flexibility. This new hose meets the requirements of industrial and medical endoscopy equipment, as well as specialized microfluidic instruments, offering a small bending radius, chemical resistance, high electrical insulation, low fluid flow resistance, temperature resistance (capable of long-term use in operating conditions between -60°C and 230°C), high cleanliness, and resistance to scaling.

Claims

1. Highly elastic polytetrafluoroethylene hose, characterized by: The invention comprises a first pure polytetrafluoroethylene tube body, the outer layer of the pure polytetrafluoroethylene tube body is covered with a first polytetrafluoroethylene fiber layer, the outer layer of the first polytetrafluoroethylene fiber layer is covered with an expanded polytetrafluoroethylene layer, the outer layer of the expanded polytetrafluoroethylene layer is covered with a second polytetrafluoroethylene fiber layer, and the outer layer of the second polytetrafluoroethylene fiber layer is covered with a second pure polytetrafluoroethylene tube body.

2. The high elasticity polytetrafluoroethylene hose according to claim 1, characterized in that: The thickness of the expanded polytetrafluoroethylene layer is greater than the thickness of the first pure polytetrafluoroethylene tube, the first polytetrafluoroethylene fiber layer, and the second polytetrafluoroethylene fiber layer.

3. The high elastic polytetrafluoroethylene hose according to claim 1 or 2, characterized in that: The thickness of the second pure polytetrafluoroethylene tube is greater than or equal to the thickness of the second polytetrafluoroethylene fiber layer.

4. The highly elastic polytetrafluoroethylene hose according to claim 1, 2 or 3, characterized in that: The thickness of the first polytetrafluoroethylene fiber layer is greater than that of the second polytetrafluoroethylene fiber layer.

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