Product Focus: Tubing

FEP Heat Shrink Tubing

Putnam Plastics Corp., Dayville, CT, has added FEP heat shrink tubing to its portfolio. The tubing is manufactured without any processing aids, including silicone oil. Featuring less than 5 percent lineal shrinkage, the tubing may provide increased tensile values on certain bonded catheter shafts. Standard wall thicknesses range as low as 0.006 in. in diameter and up to 0.020 in. For custom sizes, wall thicknesses as low as 0.004 in. can be achieved. The heat shrink tubing offers expanded inner diameters up to 0.375 in. and an expansion rate of up to 1.7 times the original size.

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Polyimide Tubing

Microlumen, Oldsmar, FL, offers tubing ideal for critical applications and low-invasive medical devices. Polyimide is a thermoset plastic that has excellent mechanical, thermal, and chemical properties. Applications include stent deployment and drug-delivery systems as well as urological and cardiovascular catheters. Braid/coil-reinforced designs are available for added flexibility, torque, and column strength. PTFE liners, Pebax, and nylon multi-durometer constructions and laser machining are also offered. The company is ISO 9001:2000 and13485:2016 certified.

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Thin-Walled Tubing

Sigma-Netics, Riverdale, NJ, has added precision, thin-walled metal tubes for use in biomedical components and other applications. The deep-drawn tubes are available as completely open or as closed at one end, and they come in various metal materials, including stainless steel, Monel, beryllium-copper, brass, and bronze alloys. Precision tolerances as low as 0.004 in. are available on the tube diameters, as well as tighter tolerances ranging from 0.00015 to 0.0005 in. on the wall thickness. The tubes are supplied in hard or fully annealed conditions.

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Translucent PHST

A 1.8:1 shrink ratio translucent peelable heat shrink tubing (PHST) is available from Junkosha, Tokyo, Japan. The PHST is suitable for the manufacture of interventional medical devices such as micro-catheters due to its simplicity in removal. The PHST allows for complex shapes and constructs to be added to the catheter, simplifying the manufacturing process and increasing efficiency. This leads to a more streamlined and cost-effective production of intricate catheter builds. The PHST requires just a single slit to start the peeling process.

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