Putnam Plastics is capable of extruding virtually all melt processed thermoplastic resins that can be extruded in natural or compounded forms, with additives to affect color, radiopacity, lubricity, anti-microbial and other properties. Thermoplastics cover wide range of performance properties from rigid materials such as PEEK and polysulfones to flexible thermoplastic elastomers.
Thermoplastic elastomers combine some of the properties of rubber with the processing advantages of thermoplastics. Like rubbers, the thermoplastic elastomers key properties are hardness and stiffness or flexibility with the melt processing advantages inherent with thermoplastics. Thermoplastic urethanes and polyether block amides (PEBA) are perhaps the most commonly used thermoplastic elastomers in applications such as catheter tubing, balloons, wound dressings, surgical drapes, storage bags, strain reliefs, and numerous other medical device applications. These materials offer a good balance of tensile strength, toughness, elongation, kink-resistance, hydrolysis-resistance, and thermoplastic processability. Thermoplastic polyurethanes dominate the central venous catheter market and are used in some diagnostic and guiding catheter designs. Polyamides (also known as nylons) and polyamide block co‐polymers (PEBA) dominate the PTCA catheter market. They are the polymer of choice for balloon catheters and for stent delivery catheters.
|Polymer||Grade (Brand)||Tensile Strength (psi)||Flexural Modulus (psi)||Shore Hardness|
|Nylon 11||BESNO (Rilsan®)||10,290||213,000|
|Nylon 12||L25 (Grilamid®)||10,150||241,000||74D|
|TPU||EG 65D (Tecoflex®)||8,300||2,500||60D|
|EG 72D (Tecoflex®)||8,100||3,400||67D|
|EG 93A (Tecoflex®)||7,700||1,100||87A|
|2363 55D (Pellethane®)||6,900||24,900||55D|
|2363 65D (Pellethane®)||6,460||32,000||65D|
|2363 75D (Pellethane®)||5,810||189,000||75D|