The material selection platform
Plastics & Elastomers
The material selection platform
Plastics & Elastomers
by SpecialChem
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ChronoFlex AL™ 75A–B20

ChronoFlex AL™ 75A–B20 by AdvanSource Biomaterials is a strong, phthalate-free, aliphatic polycarbonate-based thermoplastic polyurethane (TPU + PC) elastomer. Is a bio-durable and biocompatible grade, available in antimicrobial, radiopaque and solution form. Exhibits low modulus of elasticity, inherent material strength and limited softening in-vivo. Offers excellent chemical-, solvent- and environmental stress-cracking resistance (ESCR). Designed to overcome surface degradation such as stress-induced microfissures. ChronoFlex AL™ 75A-B20 can be used across a broad range of areas ranging from oncology and neurology to cardiovascular disease management. Recommended for reliable performance in long and short term implantable devices. Complies with USP CLASS VI, ISO 10993-5, ISO 10993-11 and ISO 10993-10 regulations.
Product Type
TPU or TPE-U (Thermoplastic Polyurethane) > TPU + PC
Physical Form
Product Status

ChronoFlex AL™ 75A–B20 Properties

Physical Properties

Value & Unit
Test Condition
Test Method
Specific Gravity
1.10 - 1.40 -
( )
Melt Mass-Flow Rate (MFR or MFI = Melt Flow Index or MI = Melt Index)
2 - 26 g/10 min
(205°C/3.26 kg)
ASTM D1238

ChronoFlex AL™ 75A–B20 Processing Guidelines

Processing Properties

Value & Unit
Test Condition
Test Method
Dew Point
- 40 °F
Hopper Temperature
120 - 150 °F
Pre-Drying Temperature
160 - 200 °F
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