| 摘要 |
<p>A self-supporting body of homogeneous hydrophilic polymer, typically a cross-linked acrylic polymer based on 2-hydroxyethyl acrylate, contains water at a concentration of 1 to 20 weight % such that the the body has anti-static properties. The body is preferably clear and transparent, and may be used under conditions where a build-up of static electricity might otherwise have been expected. Also claimed is a reference standard for radioactive analyses which includes a sheet of the said body which has been radioactively labelled.</p> |
