PVC Free Compounds (TPE's) for Medical Application

PVC Free Compounds (TPE's) for Medical Application

KEY REASONS FOR PVC TO BE REPLACED:-

PVC medical devices are of health concern because they contribute to dioxin formation during manufacture. And during use, the devices can leach the phthalate DEHP, are productive toxicant linked to birth defects in laboratory animals.The FDA warned health care providers in 2002 that some patients may be at risk from DEHP leaching from PVC medical devices and recommended switching to PVC FREE solutions like TPE's.

TPEs PURE AND SAFE MATERIALS FOR MEDICAL APPLICATIONS:-

The possibility to use TPEs in medical devices are endless: from high-performance TPEs for syringes, materials with high barrier resistance properties or gel-soft cushioning,to gaskets and seals, vial caps and soft touch cushions for glucose measuring devices.The soft TPEs feature very low levels of extractables, they are FDA compliant, easy tosterilize, latex and PVC-free, they offer excellent sealing performance, are cost effective,easy to recycle and feature excellent overmold adhesion to a wide range of plastics.Ultrasoft gel TPEs are also available.

MEDICAL TUBING:-

The trend towards latex and PVC replacement, has led to a significant increase in the application of TPEs in medical tubing. Also here the advantages are numerous FDA compliance, easy sterilization and recycling, low coefficient of friction, low opacity and high translucency.

OVERMOULDING TPEs : A NEW DESIGN TECHNOLOGY:-

Overmolding a plastic part with a TPE is a new design technology that offers benefits including ergonomics and soft feel, improved aesthetics, better grip, cushioning against impact and vibration, and insulation against electricity and heat. Overmolding cannot bedone using conventional elastomers. Overmolding is an injection-molding process whereone material (usually a TPE) is molded onto a second material (typically a rigid plastic).If properly selected, the overmolded TPE will form a strong bond with the plastic thatis maintained in the end-use environment. With Overmolding, the use of primers or adhesives is no longer required to achieve an optimum bond between the two materials.To ensure the best bond, it is important to choose the right TPE for each base resin. Overmolding is finding value in disposable systems used in bio processing.The TPE tube is bonded to the cap using Overmolding technology. This one piece construction enables direct, aseptic transfer of fluid and avoids contamination and product loss from loose connections.

CONCLUSION:-

New TPEs offer a combination of design freedom, system cost benefits, regulatory

compliance and improved performance. These new materials are increasingly replacingconventional rubber in a wide range of medical applications. More importantly, TPEs add a new dimension in material options by offering new and unique set of performance properties which can be achieved by using PVC Free, TPE's.

Technovinyl Polymers India Ltd. offers cost effective TPEs for extrusion processing that have proven their performance in many medical device applications such as drainage tubing,tourniquets, peristaltic pump tubing or catheter tubing.

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