Welding technology for blood bag tube openings

1. The core requirements of interoperability
Material compatibility
Medical plastics such as PVC, TPU, etc., which are commonly used for blood bag tube openings, and chemical components of the tube body required for adhesive materials. For example, the use of PVC pipes includes certain plastics, special flames, avoidable factors such as molecular cracking, embrittlement, and precipitation of harmful substances after heating.
heat effect area control system
The contact temperature is controlled to ensure that the current material is close to the melting point (PVC temperature is 160-210℃), the high temperature leads to material melting, and the thermal strength is insufficient. The temperature of the area in contact with the heating power during the heating process, ensuring that the heating time is less than 2 seconds or less will cause damage to the heating power.
Sealing strength
焊缝满聡设计疗级织标采采，demand to transport the explosion test (acceptance ≥300mmHg forceless leakage) and the pressure test (exfoliation strength ≥15N/15mm). The contact strength of the tube body is high, preventing the vibration during transport and causing the fire to rupture.
2. Mainstream flame bonding technology comparison
high altitude contact
Principle: High-voltage electricity, magnetic material molecules, frictional heat, actual melting and fusion.
Excellent performance: fast contact speed (1 second ≤1 second), small heat effect (≤0.5mm), high contact strength (exfoliation strength 25N/15mm).
super voice wave contact
Principle: Use machine vibration friction to generate heat, no demand external heat source.
Advantage: Low-quality equipment (approximately 100,000-300,000 yuan), suitable for thin wall materials (wall thickness ≤1mm).
heating plate
Principle: Pass the heating plate through the heating pipe mouth, melt the material and then remove it.
Excellent performance: Easy to read, low price (about 50,000-150,000 yuan in Taiwan).
intense light contact
Principle: intense luminous flux fused material, actually high-precision fused material.
Good performance: constriction (≤0.3mm), no contact staining.
Recommendation:

High quality connection, blood bag tube mouth connection selection, due to its high efficiency and quality.
Ultrasonic waves can be used for small quantity production, but the demand is increased and the sealing capacity is increased (each rate ratio ≥5%).