Блессон | TPU IV Catheter Extrusion Line

一. Product Overview of the Blesson TPU IV Catheter Extrusion Line

The Blesson TPU IV catheter extrusion line is dedicated to the production of medical thermoplastic polyurethane (TPU) IV catheters. TPU material consists of soft segments and hard segments, combining rubber-like elastic recovery with plastic processability and good biocompatibility, and can meet the clinical safety requirements for long-term indwelling use.

IV catheters extruded on the Blesson TPU IV catheter extrusion line feature a soft catheter body and outstanding kink resistance. The TPU catheter can withstand arbitrary ±180° bending without permanent deformation and can maintain lumen integrity under repeated bending or loading conditions, making it less prone to fracture or occlusion.

В дополнение, TPU material is DEHP-free, shows no significant drug adsorption, and has excellent hemocompatibility, helping maintain drug efficacy during infusion and drug administration. With these properties, the product is suitable for clinical scenarios requiring reliable vascular access, such as long-term intravenous infusion and chemotherapy administration.

Blesson TPU IV Catheter Extrusion Line

二. Application Scope of TPU IV Catheters

The TPU IV catheters produced on the Blesson TPU IV catheter extrusion line are mainly used in clinical scenarios requiring long-term and repeated vascular access. In chemotherapy for oncology patients, polyurethane IV catheters can be used as long-term intravenous indwelling access, offering both safety and cost-effectiveness.

In routine long-term intravenous infusion, parenteral nutrition infusion, continuous antibiotic administration, and other scenarios, the softness and kink resistance of TPU catheters help reduce the risk of catheter kinking or occlusion caused by limb movement during indwelling, and reduce tissue damage caused by repeated puncture.

В дополнение, TPU material further softens at body temperature, helping reduce mechanical irritation to the vessel wall and improving patient comfort during indwelling. The line’s precise dimensional control capability and optional radiopaque stripe configuration also make it suitable for specialty infusion access products with high requirements for catheter positioning accuracy and batch consistency.

三. Overview and Core Configuration Advantages of the Blesson TPU IV Catheter Extrusion Line

1.Line composition and positioning: The Blesson TPU IV catheter extrusion line is a dedicated precision extrusion system for TPU IV catheters. It mainly consists of a single-screw extruder, high-precision extrusion die, vacuum sizing and cooling tank, online diameter measurement and closed-loop control system, servo-driven traction and cutting integrated machine, and clean take-up device. It covers the entire process from raw material plasticizing and extrusion, sizing and cooling, online inspection to fixed-length cutting, and is configured around the dimensional accuracy, batch consistency, and clean production requirements of medical small-bore tubing.

2.Control system and synchronous speed regulation advantages: The Blesson TPU IV catheter extrusion line is equipped with an imported servo system and Siemens PLC control system, achieving full closed-loop synchronous speed regulation between extrusion and traction. The traction speed can dynamically match the extruder speed in real time, avoiding diameter drift caused by host speed fluctuations or external environmental interference, and keeping the entire line in a high-precision, high-response synchronous operating state.

3.Cooling sizing and online diameter measurement advantages: Vacuum-sealed cooling is adopted in the cooling and sizing stage, together with an online diameter measuring device for real-time monitoring and feedback of the catheter outer diameter. The closed-loop system automatically adjusts process parameters accordingly, stabilizing dimensional tolerances within the precision range required for medical IV catheters. The online diameter measurement accuracy can reach the order of 0.001 mm.

4.Cutting quality and clean operation advantages: The cutting unit adopts a servo-driven cutting structure, with the cutting edge and clamping method optimized for soft small-bore tubing. The cut is flat, free of burrs and loose filaments, and the fixed-length accuracy and cut quality meet the subsequent assembly requirements of IV catheters. The entire line operates under a clean-compatible design; key contact parts are made of stainless steel, and the transmission and cooling systems are designed for low noise and low dust, ensuring product consistency and qualification rate in batch production.

5.Specification adaptability and radiopaque stripe extrusion capability: By changing the extrusion die, the line can accommodate IV catheter specifications with different diameters and wall thicknesses, covering various commonly used needle gauge sizes. For clinical scenarios requiring intraoperative or post-placement positioning, an optional radiopaque stripe co-extrusion function can be configured: the radiopaque material flow channel is arranged coaxially with the main material flow channel, and the radiopaque material is encapsulated by the main material within the catheter wall during extrusion, forming a continuous, dimensionally stable radiopaque stripe structure. This ensures continuity of the radiopaque marker without affecting the smoothness or dimensional accuracy of the outer surface.

6.Customized service capability: On the basis of the standard configuration, Blesson can provide customized services according to customers’ specific product specifications and process requirements. By changing dies, adjusting downstream auxiliary equipment, and optimizing process parameters, the line can be adapted to different diameters and wall thicknesses, catheter colors, hardness gradients, compatibility with hydrophilic/hydrophobic coatings, and reeled or straight-cut packaging formats, helping align the line configuration with customers’ product development goals.