Preparation of plasticized pvc packagings with low matter transfers in n-hexane by using a pre-immersion in methanol

✍ Scribed by A. Senoune; J.M. Vergnaud

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 305 KB
• Volume: 28
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(92)90151-q

✦ Synopsis

AImtrtct--Plasticized PVC is often used as packaging for blood and other liquids, and so is in contact with various liquids. Sometimes, two matter transfers are observed: the liquid enters the PVC and then enables the plasticizer to leave the solid. These two transfers are controlled by transient diffusion and are connected, their diffusivities depending on both the concentrations of the liquid and plasticizer. An attempt is made to reduce these transfers by using a two-step method: the PVC specimen is immersed in methanol for a short given time, and then the methanol is evaporated as far as possible. The final material exhibits low matter transfers when in contact with n-hexane, at least for some time. Methanol is selected as it is poorly soluble in n-hexane.