Applications of Evonik VESTAMID® Care ML67 Medical Grade Nylon 12 in Industrial Manufacturing

VESTAMID® Care ML67 Medical Grade Nylon 12 is a high-purity polyamide engineered to meet the demanding requirements of the medical and healthcare industries, ensuring consistent performance, compliance, and integration across specialty device manufacturing. The following application scenarios highlight specific industrial uses with corresponding integration, regulatory standards, formulation ratios, and resulting medical end products.

1. Intravenous Catheter Tubing Extrusion

This medical-grade nylon plays a central role in the production of intravenous (IV) catheter tubing, where dimensional precision, chemical resistance, and patient safety are critical. Manufacturers select this material to enable stable extrusion, minimal leachables, and reliable sterilizability for single-use medical devices. The polymer’s inherent flexibility enables the fine balancing of tubing wall thickness and kink resistance, a key performance metric in critical care settings.

Industry compliance standards

• ISO 10993-1 Biological Evaluation of Medical Devices
• USP Class VI Biocompatibility
• 21 CFR 177.1500 (FDA regulation for nylon polymers in medical devices)
• ISO 13485 Quality Management Systems

Typical usage ratio

• Used at 98–100% as the primary polymer in catheter extrusion formulations; minor adjustments may include up to 2% process additives (antioxidants or colorants) depending on dimensional requirements.

Downstream process integration

• The polymer enters extruder hoppers after pre-drying; operators perform precision melt extrusion at 200–240°C, followed by controlled cooling to ensure dimensional and surface integrity of the catheter tubing.

Final product types

• Peripheral IV catheter tubing
• Central venous catheter tubing
• PICCs (Peripherally inserted central catheters)
• Microbore extension tubes

2. Balloon Catheter Component Blow Molding

Device OEMs utilize this material for producing high-strength, inflation-resistant balloon catheter elements through precision blow molding processes. Its controlled crystallinity profile supports thin-walled, high-burst balloons for interventional and minimally invasive procedures, where clarity and low extractables align with stringent product release requirements. This application requires a material grade that withstands high-pressure inflation protocols and sterilization cycles without stress cracking or compromising flexibility.

Industry compliance standards

• ISO 10555 Intravascular Catheters — Sterilization and Testing
• ISO 10993 Series — Biocompatibility
• FDA 21 CFR 820 Quality System Regulation
• ISO 14644 Cleanroom Production Standards

Typical usage ratio

• Used as 100% base polymer for balloon sections in single-layer blow molded designs; for multilayer structures, comprises 60–90%, with the balance made up of tie layers or adhesive resins based on burst pressure specifications.

Downstream process integration

• Material is precision-fed into blow molding machines, where manufacturers preform parison tubing, heat the parison, and utilize inflatable molds for shaping and wall thickness control. Post-molding annealing locks in mechanical properties and dimensional tolerances.

Final product types

• Angioplasty balloon catheters
• Atherectomy catheter balloons
• Diagnostic dilation balloons
• Peripheral vascular balloon devices

3. Medical Luer Connector Injection Molding

In the production of precision medical device fittings such as luer lock connectors and threaded fluid pathway adapters, our material’s resistance to stress cracking and repeat sterilization is indispensable. Downstream manufacturers rely on this polyamide to minimize risk of extractables in medication administration pathways, and its dimensional stability ensures strong, leak-proof interconnections for disposable and reusable systems alike. Injection conditions are tightly regulated to maintain clarity and avoid residual stress, particularly in transparent luer variants.

Industry compliance standards

• ISO 80369-7 Small-Bore Connectors for Liquids and Gases in Healthcare
• USP 661.1 Plastic Materials of Construction
• ISO 14001 Environmental Management (for production facilities)
• REACH Compliance (for chemical content and leachables)

Typical usage ratio

• Configured as 95–100% of the polymer matrix; up to 5% impact modifiers or color masterbatches may be introduced if required for identification or improved handling, adjusted according to end-product pressure resistance.

Downstream process integration

• Pelletized polymer is dried and introduced into injection molding machines. Temperature control between 210–250°C ensures short cycle times, accurate flow, and air-free cavity fill for complex geometries. Ejected parts undergo quality sorting and, where required, gamma or EO sterilization downstream.

Final product types

• Luer lock connectors and fittings
• Needle-free injection valve bodies
• Syringe tips and adapters
• Spirometry and respiratory connectors

4. Medical Flexible Tubing in Insulin Delivery Devices

Medical device assemblers choose this grade of nylon for flexible tubing in insulin pump sets due to its low moisture uptake, resistance to kinking, and stable mechanical strength across a wide range of operating temperatures. This application requires precise control of internal dimensions to ensure consistent fluid flow and compatibility with wearable infusion technologies. Minimizing particulate generation during tubing production and assembly is also critical for infusion set reliability.

Industry compliance standards

• ISO 11608 Needle-Based Injection Systems
• ISO 10993 Biocompatibility
• EN ISO 14971 Risk Management for Medical Devices
• IEC 62304 Software Lifecycle (for integrated pump systems)

Typical usage ratio

• Utilized at 100% as the extrusion base material; no blend required for infusion tubing. Trace amounts of lubricants (<0.5%) may be included when specified for reduced insertion force.

Downstream process integration

• Processed through medical-grade extruders equipped for microbore output (inner diameter 0.3–1.0 mm), typically with online laser measurement for tolerance control. Tubing then undergoes coiling, cut-to-length operations, and aseptic packaging for ultimate assembly on automated lines.

Final product types

• Insulin pump infusion tubing
• Continuous glucose monitor sensor leads
• Disposable wearable infusion sets
• Microfluidic transfer lines for drug delivery

5. Medical Device Housing and Instrument Handles

This specialty polyamide forms structural components for handheld medical device housings and instrument handles that must tolerate repeated sterilization, mechanical shock from accidental drops, and aggressive surface disinfection. Original equipment manufacturers specify the material for its light weight, impact properties, and its ability to retain colorants without degradation under harsh cleaning agents found in clinical protocols.

Industry compliance standards

• ISO 14971 — Medical Device Risk Management
• FDA 21 CFR 820 — Medical Device Good Manufacturing Practice
• IEC 60601 — Basic Safety of Medical Electrical Equipment
• ISO 10993-10 — Tests for Irritation and Skin Sensitization

Typical usage ratio

• Composition ranges from 90–98% as base matrix. Color masterbatches (1–5%) and glass fiber reinforcement (up to 8%) are incorporated when enhancing rigidity, subject to device drop test protocols.

Downstream process integration

• Material is compounded with color or fillers as specified, then injection-molded using multi-cavity tools at 230–260°C. Components undergo ultrasonic welding or laser marking prior to final device assembly, with downstream validation for extractables/leachables and surface chemistry.

Final product types

• Infusion pump housings
• Surgical instrument handles
• Plaque removal device bodies
• Patient monitoring device casings

6. Dialysis and Blood Filtration System Components

This material is selected for the fabrication of connectors, manifolds, and flexible lines in renal therapy equipment, where biocompatibility and chemical inertness are essential for long-term patient safety. Components prepared from this grade exhibit low protein binding and minimal extractables, supporting rigorous dialysate purity requirements. Production processes demand precise molding and tube extrusion to produce leak-free, pressure-resistant assemblies capable of enduring repeated use and sterilization.

Industry compliance standards

• ISO 8637 — Extracorporeal Systems for Hemodialysis
• Ph. Eur. (European Pharmacopoeia) 3.2.2 — Plastic Containers and Closures
• ANSI/AAMI/ISO 11663 — Quality of Dialysis Fluids for Hemodialysis
• USP 85 — Bacterial Endotoxins Test

Typical usage ratio

• Employed as 90–100% base resin for component molding and tube extrusion; up to 10% may include antistatic agents or plasticizers to enhance surface flow and reduce clotting risk in blood contact parts, adjusted according to in-vitro test data.

Downstream process integration

• Material is molded or extruded into manifolds, tube sets, and vessel connectors, then passivated and assembled in controlled environments. Assemblies undergo batch sterilization (steam, EO, or gamma) prior to final QC and device release.

Final product types

• Dialysis machine tube sets
• Bloodline connectors for renal therapy
• Hemodiafiltration manifold components
• Plasma separation device connectors