Bags used for storage, transportation or dispensing fluids are prolific throughout the healthcare industry. These containers are commonly produced from extruded or blown film that is sealed along designated edges.
PVC is used in a wide array of fluid containing medical devices, including intravenous (IV) bags, blood bags, feeding bags and dialysis bags. Unplasticized PVC is rigid by nature. Plasticizers are used to increase flexibility of the polymer for use in bags. The FDA has noted that Di(2-ethylhexyl)phthalate (DEHP), a commonly used PVC plasticizer, has shown adverse effects in laboratory animals. While similar adverse events have not been reported in humans they have not been ruled out. TPV offers a range of DEHP free PVC for applications that are in contact with bodily fluids.
Polyvinylidene fluoride (PVDF) bags, including those made of Kynar® are well suited for sample containment of gases or liquids, or single-use sterile manufacturing operations in bioprocessing. Bags made from PVDF are resistant to a wide range of sterilization processes including ultraviolet radiation and concentrated acids or halogens.
Polyolefin polymers such as polyethylene (PE) and polypropylene (PP) are also available as a plasticizer free alternative to PVC. PE film is inhert and offers flexibility and tear resistance, while PP provides a higher degree of clarity and excellent barrier properties against moisture and vapors.