Super-Tri Tubing

Super-Tri Tubing

February 17, 2016

Putnam Plastics

Dayville, Connecticut – Putnam Plastics Corp. engineers have developed an advanced tri-layer tubing technology that significantly improves tensile and burst strength, while reducing elongation. Super-Tri tubing is made with a proprietary extrusion process and aids in the prevention of wire lock-up in catheters where guidewires are used.

Standard tri-layer tubing, often used in PTCA (percutaneous transluminal coronary angioplasty) delivery systems, consists of three distinct polymer layers within one wall. Tri-layer construction typically involves a HDPE (high density polyethylene) inner liner for lubricity, a proprietary middle layer for bonding, and a polyamide outer layer which when combined, provides a unique combination of strength, trackability, and bondability. Super-Tri tri-layer tubing technology utilizes the same material combination as traditional tri-layer tubing while providing superior performance characteristics. 

As the requirements for medical catheters and devices evolve, the need for innovative extrusion solutions has never been greater. For example, Super-Tri tubing assists in issues that have evolved from higher rated burst pressure balloons catheters. Compared to traditional tri-layer tubing, Super-Tri tubing has decreased elongation by 750% and increased burst strength by 98%. This makes this tubing technology ideal for balloon catheters requiring high pressure balloons. The significant reduction in the elongation and increased tensile strength considerably decrease the potential for guidewire lock-up. In addition, the Super-Tri tubing technology meets the same sizing, tolerances, and material configurations as traditional tri-layer tubing. 

“Putnam’s new Super-Tri tubing technology has the ability to provide dramatically increased tensile strength while minimizing elongation,” said Bill Appling, director of engineering and assembly, Putnam Plastics. “For example, a PTCA inner member where tri-layer tubing is most commonly used can now be produced with a 130% improvement in ultimate tensile strength, and 170% increase in tensile strength at yield. This product provides new options in the design of catheters for the next generation of devices where strength and size are critical.” 

Source: Putnam Plastics