Endeavours to find a substitute for PVC film, for example in medical applications, have been made more difficult by the fact that polyolefin film cannot be processed in high frequency (HF), radio frequency (RF) welding units. The Dow Chemical Company (Midland, Michigan, USA) has evidently succeeded in overcoming this technical problem. The polyolefin films marketed under the name “Covelle” are HF-weldable and can therefore be processed on existing equipment for PVC, EVA or PU film. The films can be sterilised with ethylene oxide or gamma rays. Because no plasticizers are used, there is no risk of health problems that otherwise could be caused by such products. The films are manufactured at Findlay and Hebron (both Ohio, USA), while production in Europe (France) will begin before the end of next year.

Another new development from Dow should help with a different kind of problem in health care. A considerable number of people suffer from a rubber allergy, which is a problem for doctors, nurses and others who frequently have to wear disposable latex gloves. As an alternative, Dow is now offering polyurethane materials under the name “Intacta”. Gloves of this material are said to have comparable properties in terms of wear comfort, durability, flexibility and elastic recovery.