Med-Tech Innovation Products and Services
PRODUCTS AND SERVICES New absorption test
Medical Engineering Technologies’ (MET) device testing laboratory has developed a new test for superabsorbent dressings. Testing is normally performed according to EN 13726-1:2002: Test methods for primary wound dressings, Part 1: Aspects of Absorbency, section 3.2 Free Swell Absorptive Capacity. These methods underestimate the performance of super absorbent dressings by restricting the expansion of the dressing material. The standard’s title states “free swell capacity,” but in practice the expansion of the dressing is restricted to prevent the test sample from disintegrating. The MET test method allows a greater area of the dressing to swell than that detailed in the standard. The swell volume in the new test more closely resembles clinical practice and a true performance of these products. Medical Engineering Technologies tel. +44 (0)8454 588 924,
www.met.uk.com
Plasticiser migration study
Teknor Apex has completed a study of plasticiser migration because it may affect non-PVC thermoplastics that are widely used for medical device components that come into contact with components made of PVC. The study focuses on four materials commonly used in conjunction with PVC: ABS, acrylic, polycarbonate and polystyrene. A typical example is PVC tubing used with PC connectors, but the study has implications for other PVC devices such as bags and masks. The
company reports that results show that in these applications certain plasticisers may cause softening, cracking or other defects in non-PVC components as they migrate across the interface with the component made of PVC, and other plasticisers exhibit little or no effects. The study results are of interest to manufacturers of PVC devices
who are considering switching to compounds containing alternatives to the phthalate plasticisers. The company has supplied the accompanying table in which plasticisers are ranked vertically by acceptability. The phthalate plasticisers in the study included DEHP and DINP, both of which were not recommended for contact with three of the four non- PVC materials; and DPHP, which was found acceptable for contact with three of them. “Teknor Apex conducted this study to help manufacturers make informed decisions about prospective alternative PVC formulations, and indeed about the materials used in conjunction with PVC,” said Peter M. Galland, Industry Manager for Medical Compounds. “We are prepared to supply each customer with exactly the right PVC compound, whether it incorporates a standard plasticiser or any of the alternatives now available.” Details on the study are posted at:
www2.teknorapex.com/ PVC-Plasticizer-Migration. Teknor Apex
tel. +1 401 725 800,
www.teknorapex.com Explore graphene
“Innovative Graphene Technologies: Evaluation and Applications, Volume 2” is now available from Smithers Rapra Publishing. The high electrical and thermal conductivities in graphene are well known and most of the applications of this material are pivoted around these properties. In addition to electronic and thermal management applications there are several other vital areas where graphene can be used successfully. This book is compiled in two volumes. Volume 1 is meant for beginners who want to know the science and technology associated with this nanomaterial. It is designed to provide readers with numerical/ physics based models for assessment of graphene for targeted applications and to introduce the industrial applications of graphene. The second volume is written for broader readership including researchers with diverse backgrounds and can be used as a reference. Smithers Rapra
tel. +44 (0)1939 250 383,
www.polymer-books.com
Book your delegate place today to gain full access to the Expo featuring over 150 medical device supply chain companies at the UK’s largest event for the med-tech industry
Supported by 2-3 April 2014 Ricoh Arena, Coventry UK
www.mtiexpo-uk.com
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Ads_FINAL.indd 4 42 ¦ September/October 2013
www.med-techinnovation.com 04/10/2013 11:03
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