Our studies show that some films made of lower-grade resins can be harder to set up and use in manufacturing. This is because of their inherent stiffness (Young’s modulus) and higher Tg or Glass transition temperature, which is where a material changes from a fully flexible state into one where it is stiffer and somewhat brittle under stress. Attempting to process and safely reach their destination can be problematic for these materials, particularly in cold climates.
Nurses have also complained about stiffer IV bag materials actually cutting their fingers as they prepare to administer the IV drip.
Sealed Air uses polyethylene as its primary material for its M312 family of IV films. Once extruded, the modulus ranges from 830 to 1,350 kg/cm2 (11,805-19,201 psi) depending on the grade of film. In contrast 3-ply polypropylene films, a frequent choice for standard saline, have a Young’s modulus ranging from 3,130 up to 5,040 kg/cm2 (44,500-71,700 psi). In other words they are 4 times stiffer. See how our films drape easily around the ports during bag production here.
For the M312 family, the Tg is -120°C while for polypropylene, this happens around -20°C. For storage, production and distribution in cold climates, this can lead to poor seals, leaking bags and bags breaking if dropped while our products are drop tested from a height of 2 metres on each corner and do not break or leak.
- Primary packaging for intravenous pharmaceutical solutions
- Large volume parenterals, dialysis, irrigation, specialty drugs