ChronoFlex C is a family of biodurable aromatic polycarbonate-based thermoplastic urethanes designed to overcome surface degradation such as stress-induced microfissures.
With a long history of reliable performance in both long and short term devices, this medical grade polymer has the versatility to be used across a broad range of applicational areas ranging from oncology and orthopedics to cardiovascular disease management.
These ether-free polyurethane elastomers are biostable and display a low modulus of elasticity, excellent solvent resistance and limited softening in-vivo.
These products are adaptable to most standard manufacturing processes and are available in hardnesses ranging from 75 Shore A to 75 Shore D.
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ChronoFlex C (typical example ranges shown)* | ASTM Standard | |
Durometer Range Available | 75 Shore A – 75 Shore D | |
Water Absorption | 1.00% | D570 |
Melt Flow | 2 – 26 g/10 min | 205° C/3.26 kg | D1238 |
MECHANICAL PROPERTY RANGES
Durometer | 80A | 75D | |
Ultimate Tensile Strength (psi) | 5500-8000 | 4500-6500 | D638 |
Tensile (psi) | |||
@ 50% elongation | 500-700 | 4200-5000 | D638 |
@ 100% elongation | 800-1000 | 4500-5200 | D638 |
@ 200% elongation | 1900-2100 | 4900-5800 | |
@ 300% elongation | 5200-6000 | - | D638 |
Ultimate Elongation (%) | 300-500 | 200-350 | D638 |
*Data provided herein is meant to show a general range for the ChronoFlex C product lines; these properties can be tailored to meet specific values based on customer requirements.
CHRONOFLEX C
| USP CLASS VI TESTED: | ISO TESTED: |
MEM Elution | Meets ISO 10993-5 guidelines | |
AGAR Overlay | Meets ISO 10993-5 guidelines | |
Systemic Injection Test | Meets Class VI guidelines | Meets ISO 10993-11 guidelines |
Intracutaneous Injection Test | Meets Class VI guidelines | Meets ISO 10993-10 guidelines |
Intramuscular Implantation (macro) | Meets Class VI guidelines | |
Pyrogenicity | Meets ISO 10993-11 guidelines | |
Hemolysis | Non – Hemolytic | |
Phthalate Free | Does not contain or come in contact with DEHP | |
Animal-Free Origin Certified | BSE/TSE free |
ChronoFlex C processing can be optimized by drying to a moisture content equal to or less than 0.05% by weight prior to melt processing.
Typically, the pellets must be dried for 3-4 hours with a dryer inlet air temperature of 180ºF +/- 20ºF. We recommend a machine-mounted desiccant-type hopper dryer, capable of reaching and maintaining a dew point of -40ºF. If dry times are in excess of 8-10 hours, a hopper dryer temperature of 120-150ºF is usually sufficient to achieve optimal moisture content.
Typical Material Processing Temperatures in Fahrenheit with a tolerance of +/- 20ºF*
CHRONOFLEX C | 75 Shore A – 45 Shore D | 55 Shore D – 75 Shore D |
ZONE 1 | 320 | 350 |
ZONE 2 | 330 | 360 |
ZONE 3 | 380 | 400 |
CLAMP/ ADAPTER | 380 | 420 |
DIE | 390 | 440 |
MELT TEMPERATURE | 410 | 440 |
WATER COOL TEMPERATURE | 60 | 60-100 |
SCREEN PACK (all Dutch weave) | 600 MESH | 600 MESH |
* These profiles are meant to offer a general guideline for processing the materials via extrusion or injection molding. The table reflects a suggested range of temperature profiles and set up conditions which should be adjusted to accommodate your individual machine configurations and processing parameters.
Click on the image below for the ChronoFlex C datasheet
Click on the link below to view the MSDS sheet
