Core Mandrel Technology: Precision That Powers Catheter Innovation

Core mandrels are essential tools used in the production of medical tubing, particularly in catheter manufacturing. These precision-engineered components serve as the internal support structure around which tubing is extruded, helping define the final shape and dimensions of the product. Spectrum Plastics Group, a DuPont Business, has developed a proprietary approach to mandrel design that enhances performance across the board. 

In medical device manufacturing, especially for catheters used in critical procedures, tight tolerances and consistent dimensions are non-negotiable. Spectrum’s core mandrels are built to meet Six Sigma quality standards, ensuring:

• Exceptional consistency across production runs
• Low release force for easier removal and reduced risk of damage
• Tight dimensional control for high-performance tubing

These attributes directly impact the reliability and safety of the final device—ultimately benefiting the patient.

Spectrum combines multi-layer extrusion technology with 6 sigma methodologies to repeatedly deliver the highest quality acetal core mandrel used for braid reinforced interventional catheters.

Tight tolerance Acetal core mandrel extrusion is an intricate process, and in order to keep the process under statistical control, the following need to be precise and as stable as possible while guaranteeing six Sigma process capability:

• Melt pressure uniformity
• Head pressure stability
• Haul-off speed consistency
• Winding tension levels

As highlighted by Mike Butkowski, Director of Extrusion Technology at Spectrum, material selection plays a pivotal role in mandrel performance. Spectrum offers a range of customizable options to meet specific OEM requirements, including:

• Stainless steel reinforced and polymer-based mandrels
• Surface treatments to reduce friction and improve release
• Level-wound spooling for safer, more efficient pay-off during manufacturing

This flexibility allows device developers to tailor mandrels to their unique extrusion needs, accelerating development timelines and improving product outcomes.

Spectrum’s approach goes beyond product delivery. Their teams work closely with OEMs to understand design intent, troubleshoot challenges, and ensure smooth transitions between manufacturing sites. This cross-functional collaboration—spanning Quality, Engineering, Operations, and Regulatory—ensures:

• Faster decision-making
• Consistent product quality
• Streamlined validations and transfers

Core mandrel technology is a prime example of how Spectrum cares about quality in every step. By combining deep technical expertise with a commitment to continuous improvement, they empower customers to innovate faster and more confidently. 

Whether you're developing next-generation catheters or refining existing designs, Spectrum’s core mandrel solutions offer the precision, reliability, and scalability you need to succeed.