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Medical catheter used for remaining needle, and preparation method thereof

A technology for medical catheters and indwelling needles, which can be used in catheters and other directions to solve problems such as puncture and achieve the effects of outstanding strength and toughness, high transparency, and a delicate and smooth surface.

Inactive Publication Date: 2016-09-07
应城市恒天药业包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Catheter material fundamentally determines the indwelling result of the indwelling needle. Therefore, the catheter must not only have a certain strength and be easy to puncture, but also have anti-bending properties to allow the catheter to recover quickly after being folded or twisted. To reduce the risk of infection caused by bacterial colonization, it is necessary to have an X-ray-opaque function to ensure that the catheter is clearly positioned in the vein, which is particularly important in the event of rare complications such as catheter breakage, which cannot be met by the current medical catheter for indwelling needles. these multiple requirements

Method used

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Experimental program
Comparison scheme
Effect test

preparation example Construction

[0015] The second aspect of the present invention provides a method for preparing a medical catheter for indwelling needles. The steps include: mixing various raw materials and extruding them in an extruder. The extrusion temperature is 160°C in the first zone, 170°C in the second zone, and 180°C in the third zone. , 190°C in the fourth zone, 210°C in the fifth zone, and the die temperature is 160-210°C. The extrudate is cooled by a water ring and vacuum sized before closing.

[0016] Specific process conditions are conducive to the full combination of various components to form a stable blending system, ensuring high transparency, high elasticity, toughness, anti-infection and bactericidal properties of the material

Embodiment 1

[0020] This embodiment provides a medical catheter for indwelling needles, which is formed by mixing the following raw materials according to weight percentage: 75% thermoplastic elastomer; 15% polyolefin; 1% antioxidant; 1% lubricant; 0.5% antibacterial agent, 7.5% compatibilizer.

[0021] Wherein, the thermoplastic elastomer is polyurethane thermoplastic elastomer;

[0022] The polyolefin is an ethylene-octene copolymerized elastomer;

[0023] The antioxidant is antioxidant 1010;

[0024] The lubricant is medical silicone oil;

[0025] The compatibilizer is POE-g-MAH.

[0026] The medical catheter for the above-mentioned indwelling needle is prepared according to the following method, and the steps include:

[0027] Mix the above-mentioned materials in the extruder. The temperature of the extruder is set to 160°C, 170°C, 180°C, 190°C, and 210°C for the first zone, the second zone, the third zone, the fourth zone, and the fifth zone. The mouth temperature is set at 160-2...

Embodiment 2

[0030] This embodiment provides a medical catheter for indwelling needles, which is formed by mixing the following raw materials according to weight percentage: 75% thermoplastic elastomer; 15% polyolefin; 1% antioxidant; 1% lubricant; 0.5% antibacterial agent, 7.5% compatibilizer.

[0031] Wherein, the thermoplastic elastomer is polyurethane thermoplastic elastomer;

[0032] The polyolefin is linear low density polyethylene;

[0033] The antioxidant is antioxidant 1010;

[0034] The lubricant is medical silicone oil;

[0035] The compatibilizer is the compatibilizer PE-g-MAH.

[0036] The medical catheter for the above-mentioned indwelling needle is prepared according to the following method, and the steps include:

[0037] Mix the above-mentioned materials in the extruder. The temperature of the extruder is set to 160°C, 170°C, 180°C, 190°C, and 210°C for the first zone, the second zone, the third zone, the fourth zone, and the fifth zone. The mouth temperature is set a...

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Abstract

The invention provides a medical catheter used for a remaining needle. The medical catheter is prepared from the following raw material ingredients in parts by weight: 68-85% of thermoplastic elastomer, 8-20% of polyolefin, 0.4-1% of antioxygen, 0.4-1% of lubricating agent, 0.5-2% of antibacterial agent and 4-8% of bulking agent. The invention also further provides a preparation method of the above medical catheter used for the remaining needle. The medical catheter used for the remaining needle has the advantages of high transparency, smooth and fine surface, high cleanliness, good anti-deflection performance and excellent strength and toughness performance, and is s medical catheter with good combination property. Since polyolefin and bulking agent are adopted, the product simultaneously has high elasticity and high intensity, does not adopt filler reinforcement, and has good elasticity, anti-infection performance and sterilization performance.

Description

technical field [0001] The invention belongs to the technical field of medical materials, in particular to a clean, safe and stable medical catheter for indwelling needles and a preparation method thereof. Background technique [0002] At present, most of the medical catheters for indwelling needles widely used in the market are made of traditional raw material PVC, and the plasticizers or stabilizers commonly used in PVC have certain toxicity. Catheter material fundamentally determines the indwelling result of the indwelling needle. Therefore, the catheter must not only have a certain strength and be easy to puncture, but also have anti-bending properties to allow the catheter to recover quickly after being folded or twisted. To reduce the risk of infection caused by bacterial colonization, it is necessary to have an X-ray-opaque function to ensure that the catheter is clearly positioned in the vein, which is particularly important in the event of rare complications such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L29/06A61L29/04
CPCA61L29/06A61L29/041
Inventor 龙庚求王伟段锐亮徐小明朱素芳
Owner 应城市恒天药业包装有限公司