Anti-aging medical connecting line and preparation method thereof

Abstract

The invention discloses an anti-aging medical connecting line and a preparation method thereof. The anti-aging medical connecting line is prepared from the following materials: 50 to 55 parts of thermoplastic polyurethane, 25 to 30 parts of fluorinated ethylene propylene copolymer, 30 to 35 parts of platinum vulcanized silicone rubber, 1.6 to 1.9 parts of anti-aging additive, 10 to 15 parts of flame-retardant reinforcing filler, 3.5 parts of barrier reinforcing agent, 1.2 parts of conductive agent and 20 parts of toughening agent. The anti-aging plastic has excellent anti-aging performance.

Description

Technical Field

[0001] The invention belongs to the technical field of connecting wires, and in particular relates to an aging-resistant medical connecting wire and a preparation method thereof. Background Art

[0002] Cables are crucial for data and power exchange, and their performance directly impacts product functionality and lifespan. As the carrier for data and power exchange between devices, between devices and machines, and between machines, their importance is self-evident. Medical devices also require cables to connect their main unit and handheld detectors.

[0003] During long-term use, connecting cables are prone to aging and embrittlement. In mild cases, the connecting cables are damaged, and in severe cases, they may even cause fires. Therefore, the aging factor greatly affects the safety of electronic connecting cables. Especially for connecting cables in the medical industry, it is even more important to improve their aging resistance. Summary of the Invention

[0004] The present invention provides an aging-resistant medical connecting wire and a preparation method thereof to solve the above technical problems.

[0005] The solution adopted by the present invention to achieve its technical effects is:

[0006] A method for preparing an aging-resistant medical connecting wire comprises the following steps:

[0007] S1: Prepare the following raw materials by weight: 50-55 parts of thermoplastic polyurethane, 25-30 parts of fluorinated ethylene propylene copolymer, 30-35 parts of platinum vulcanized silicone rubber, 1.6-1.9 parts of anti-aging additive, 10-15 parts of flame retardant reinforcing filler, 3.5 parts of barrier enhancer, 1.2 parts of conductive agent, and 20 parts of toughening agent;

[0008] S2: First, stir the platinum vulcanized silicone rubber and toughening agent at 30°C and 50-100 rpm for 15-20 minutes, then add the conductive agent, stir at 30°C and 1500 rpm for 30 minutes, then feed it into the inner layer extruder and extrude it into a viscous gel at 30-50°C to obtain the inner layer conductive base material;

[0009] S3: The fluorinated ethylene propylene copolymer and the barrier enhancer are melt-blended at 250-270°C and a speed of 1800 rpm, and then fed into a middle layer extruder, where they are melt-extruded in an environment where the temperature is gradually reduced from 250°C to 230°C to obtain a middle layer barrier base material;

[0010] S4: The cleaned thermoplastic polyurethane is first dried at 80°C for four hours, and then the thermoplastic polyurethane, anti-aging additive and flame retardant reinforcing filler are mixed at 70°C and 1500 rpm for 30 minutes. The mixture is then fed into an outer layer extruder and melt-extruded at 175-190°C to obtain an outer layer protective base material.

[0011] S5: The inner conductive base material, the middle barrier base material, and the outer protective base material are extruded from a co-extrusion die head. The inner conductive base material, the middle barrier base material, and the outer protective base material are compounded in sequence from the inside to the outside, and then vulcanized in a vulcanization box at 170-180°C for 20 minutes. Finally, the temperature is gradually lowered to set the shape, and an aging-resistant medical connecting wire is obtained.

[0012] Preferably, in S1, the anti-aging additives include 0.3 parts of Tinuvin 770 light stabilizer, 0.8 parts of antioxidant and 0.8 parts of Stabaxol P200 anti-hydrolysis agent, wherein the antioxidant includes 0.5 parts of Irganox 1010 antioxidant and 0.3 parts of Irgafos 168 antioxidant.

[0013] Preferably, in S1, the flame retardant reinforcing filler is cardanol-modified carbon black powder.

[0014] Preferably, in S1, the barrier enhancer includes 1.5 parts of nano boron nitride powder and 2 parts of single crystal silicon nitride nanofibers.

[0015] Preferably, in S3, 3 parts of a cross-linking agent are further added and stirred together with the fluorinated ethylene propylene copolymer and the barrier enhancer; the cross-linking agent is triallyl isocyanurate.

[0016] Preferably, in S1, the conductive agent is carbon nanotubes.

[0017] Preferably, in S2, 0.5 parts of an antibacterial agent is added and mixed with the platinum-cured silicone rubber, the conductive agent, and the toughening agent, and the antibacterial agent is nano silver particles.

[0018] Preferably, in S1, the toughening agent is prepared by mixing 6-7 parts of polyisobutylene and 13-14 parts of paraffin oil.

[0019] An aging-resistant medical connecting wire is manufactured according to the above disclosed preparation method.

[0020] The beneficial effects of the present invention are as follows: the material of the connecting wire is composed of thermoplastic polyurethane, fluorinated ethylene propylene copolymer, platinum vulcanized silicone rubber, anti-aging additives, flame retardant reinforcing fillers, barrier enhancers, conductive agents and toughening agents, and has excellent resistance to wet heat aging, oxygen aging and UV aging, and high tensile strength. It can be seen that the present invention has a long service life and good safety performance for long-term use. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention. It should be noted that when an element is referred to as being "fixed on" or "set on" another element, it may be directly on the other element or there may be a centering element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be a centering element at the same time. When an element is referred to as being "fixedly connected to" another element, it may be a common fixed connection method such as welding, bolting or gluing.

[0022] A preferred embodiment of the present invention discloses a method for preparing an aging-resistant medical connecting wire, comprising the following steps:

[0023] S1: Prepare the following raw materials by weight: 50-55 parts of thermoplastic polyurethane, 25-30 parts of fluorinated ethylene propylene copolymer, 30-35 parts of platinum vulcanized silicone rubber, 1.6-1.9 parts of anti-aging additive, 10-15 parts of flame retardant reinforcing filler, 3.5 parts of barrier enhancer, 1.2 parts of conductive agent, and 20 parts of toughening agent;

[0024] S2: First, stir the platinum vulcanized silicone rubber and toughening agent at 30°C and 50-100 rpm for 15-20 minutes, then add the conductive agent, stir at 30°C and 1500 rpm for 30 minutes, then feed it into the inner layer extruder and extrude it into a viscous gel at 30-50°C to obtain the inner layer conductive base material;

[0025] S3: The fluorinated ethylene propylene copolymer and the barrier enhancer are melt-blended at 250-270°C and a speed of 1800 rpm, and then fed into a middle layer extruder, where they are melt-extruded in an environment where the temperature is gradually reduced from 250°C to 230°C to obtain a middle layer barrier base material;

[0026] S4: The cleaned thermoplastic polyurethane is first dried at 80°C for four hours, and then the thermoplastic polyurethane, anti-aging additive and flame retardant reinforcing filler are mixed at 70°C and 1500 rpm for 30 minutes. The mixture is then fed into an outer layer extruder and melt-extruded at 175-190°C to obtain an outer layer protective base material.

[0027] S5: The inner conductive base material, middle barrier base material, and outer protective base material are extruded from a coextrusion die. The inner conductive base material, middle barrier base material, and outer protective base material are laminated from the inside out. The product is then vulcanized in a vulcanization oven at 170-180°C for 20 minutes and finally rapidly cooled with water to form an aging-resistant medical connector. Electron beam irradiation and surface plasma treatment can also be performed to enhance crosslinking and bonding between the layers.

[0028] Specifically, in S1, the anti-aging additives include 0.3 parts of Tinuvin 770 light stabilizer, 0.8 parts of antioxidant, and 0.8 parts of Stabaxol P200 anti-hydrolysis agent, wherein the antioxidant includes 0.5 parts of Irganox 1010 antioxidant and 0.3 parts of Irgafos 168 antioxidant.

[0029] Specifically, in S1, the flame retardant reinforcing filler is cardanol-modified carbon black powder.

[0030] Specifically, in S1, the barrier enhancer includes 1.5 parts of nano boron nitride powder and 2 parts of single crystal silicon nitride nanofibers.

[0031] Specifically, in S3, 3 parts of a cross-linking agent are added and stirred together with the fluorinated ethylene propylene copolymer and the barrier enhancer; the cross-linking agent is triallyl isocyanurate.

[0032] Specifically, in S1, the conductive agent is carbon nanotubes, the surface of which is pre-coated with KH-550 silane coupling agent and then added to S2.

[0033] Specifically, in S2, 0.5 parts of an antibacterial agent is added and mixed with the platinum-cured silicone rubber, the conductive agent, and the toughening agent, and the antibacterial agent is nano-silver particles.

[0034] Specifically, in S1, the toughening agent is made by mixing 6-7 parts of polyisobutylene and 13-14 parts of paraffin oil. After the two are mixed, they are first heated to 50-60°C, 0.3 parts of silicone oil diluent is added and stirred to a homogeneous viscous liquid, and then added to S2.

[0035] A preferred embodiment of the present invention discloses an aging-resistant medical connecting wire, which is manufactured according to the above-disclosed preparation method.

[0036] It can be seen from the above description that the present invention has excellent aging resistance.

[0037] The preferred embodiments of the present invention are described in detail above in conjunction with the specification. It should be noted that the protection scope of the present invention includes but is not limited to the above embodiments; the specific structures disclosed in the specification are only preferred embodiments of the present invention, and technicians in the field can also develop other embodiments on this basis. Any simple deformation or equivalent replacement that does not deviate from the innovative concept of the present invention is covered by the present invention and belongs to the protection scope of the present invention.

Claims

1. A method for preparing an aging-resistant medical connecting wire, characterized in that: The following steps are involved: S1: Prepare the following raw materials by weight: 50-55 parts of thermoplastic polyurethane, 25-30 parts of fluorinated ethylene propylene copolymer, 30-35 parts of platinum vulcanized silicone rubber, 1.6-1.9 parts of anti-aging additive, 10-15 parts of flame retardant reinforcing filler, 3.5 parts of barrier enhancer, 1.2 parts of conductive agent, and 20 parts of toughening agent; S2: Platinum vulcanized silicone rubber, conductive agent and toughening agent are mixed for 30 minutes, and then fed into the inner layer extruder to extrude to obtain the inner layer conductive base material; S3: mixing the fluorinated ethylene propylene copolymer and the barrier enhancer, and then feeding the mixture into a middle layer extruder for extrusion to obtain a middle layer barrier base material; S4: mixing thermoplastic polyurethane, anti-aging additives and flame retardant reinforcing fillers for 30 minutes, and then feeding into the outer layer for extrusion to obtain the outer layer protective base material; S5: The inner conductive base material, the middle barrier base material, and the outer protective base material are extruded from a co-extrusion die head. The inner conductive base material, the middle barrier base material, and the outer protective base material are compounded and shaped from the inside out in sequence to obtain an aging-resistant medical connecting wire.

2. The method for preparing an aging-resistant medical connecting wire according to claim 1, characterized in that: In S1, the anti-aging additives include 0.3 parts of light stabilizer, 0.8 parts of antioxidant and 0.8 parts of anti-hydrolysis agent.

3. The method for preparing an aging-resistant medical connecting wire according to claim 1, characterized in that: In S1, the flame retardant reinforcing filler is cardanol-modified carbon black powder.

4. The method for preparing an aging-resistant medical connecting wire according to claim 1, characterized in that: In S1, the barrier enhancer includes 1.5 parts of nano boron nitride powder and 2 parts of single crystal silicon nitride nanofibers.

5. The method for preparing an aging-resistant medical connecting wire according to claim 1, characterized in that: In S3, 3 parts of a cross-linking agent are added and stirred together with the fluorinated ethylene propylene copolymer and the barrier enhancer; the cross-linking agent is triallyl isocyanurate.

6. The method for preparing an aging-resistant medical connecting wire according to claim 1, characterized in that: In S1, the conductive agent is carbon nanotubes.

7. The method for preparing an aging-resistant medical connecting wire according to claim 1, characterized in that: In S2, 0.5 parts of antibacterial agent is added and mixed with platinum vulcanized silicone rubber, conductive agent and toughening agent.

8. The method for preparing an aging-resistant medical connecting wire according to claim 1, characterized in that: In S1, the toughening agent is prepared by mixing 6-7 parts of polyisobutylene and 13-14 parts of paraffin oil.

9. An aging-resistant medical connecting cable, characterized by: Made according to the preparation method according to any one of claims 1 to 9.