摘要 |
<p>Material for shrouding against radiation is a sheet or film or board, with two or more layers, where each layer is composed of natural or synthetic rubber or their mixtures. The layers are stretched before bonding together in one or more direction by 5-40% of their length for a period of 0.1-2.5 hours. The natural rubber in each separate layer is a cis 1,4 unsaturated polymer or trans 1,4 gutta-percha. Material for shrouding against radiation is a sheet or film or board, with two or more layers, where each layer is composed of natural or synthetic rubber or their mixtures. The layers are stretched before bonding together in one or more direction by 5-40% of their length for a period of 0.1-2.5 hours. The natural rubber in each separate layer is an unsaturated polymer with fundamental units with rubber in the cis-1.4 configuration or gutta-percha in the trans-1.4 configuration.</p> |