Why 4J29 Medical Capillary Tubes Are the First Choice for Medical Vacuum Electrode Packaging

Why 4J29 Medical Capillary Tubes Are the First Choice for Medical Vacuum Electrode Packaging

In the field of medical equipment manufacturing, the packaging quality of medical vacuum electrodes directly affects the stability and safety of the equipment. 4J29 medical capillary tubes, with their performance advantages, have become the preferred material in this field. The core reasons lie in their excellent thermal expansion matching, good sealing performance, outstanding corrosion resistance, and stable biocompatibility.

Excellent Thermal Expansion Matching

Thermal expansion matching is a key advantage of 4J29 alloy. When medical vacuum electrodes are in operation, heat is generated due to the passage of current. If there is a large difference in the coefficient of thermal expansion between the packaging material and the electrode material, stress is likely to occur during thermal cycles, leading to seal failure. The coefficient of thermal expansion of 4J29 alloy is highly compatible with commonly used sealing materials such as glass and ceramics. Within the temperature range of -60°C to 400°C, it can deform in coordination with the electrode material, effectively avoiding cracks and air leakage caused by thermal stress and ensuring the long-term stable operation of vacuum electrodes.

Good Sealing Performance

Good sealing performance is another major advantage of 4J29 medical capillary tubes. Their pure alloy composition and refined processing technology give the tubes a dense microstructure, enabling them to achieve high-strength, high-hermeticity connections with electrode components through processes such as welding and brazing. In medical devices with extremely high vacuum requirements—such as cardiac pacemakers and CT scanning equipment—vacuum electrodes packaged with 4J29 capillary tubes can maintain the internal vacuum level at the order of 10⁻⁴ Pa, preventing the intrusion of external gases or moisture and ensuring that electrode performance is not disrupted.

Outstanding Corrosion Resistance and Biocompatibility

The corrosion resistance and biocompatibility of 4J29 alloy also make it stand out in medical applications. The medical environment is often exposed to corrosive substances such as disinfectants and body fluids. The surface of 4J29 alloy can form a stable oxide film, which effectively resists chemical erosion and extends the service life of the equipment. At the same time, as a medical-grade material, 4J29 alloy has undergone strict biosafety testing: it has no risk of metal ion leaching and will not trigger human immune reactions, complying with the safety standards for medical devices.

In addition, 4J29 medical capillary tubes have good processability and can be manufactured into tubes of different specifications through processes such as cold drawing and annealing, meeting the diverse packaging design needs. Their mature manufacturing technology and stable supply system also reduce the cost and cycle of medical equipment production. Combining the above advantages, 4J29 medical capillary tubes have become the ideal choice for medical vacuum electrode packaging.