| 摘要 |
<p>Flexible sheeting 10 suitable for use in forming a security enclosure 20 comprises a plurality of flexible layers 11,12,13,14,15 which are laminated together. Layer 11 is made of an insulant and its opposite surfaces are laminated to layers 12,13 each of which is made of an electrically-conductive low-melt material which is solid at ambient temperatures and which fluidises at comparatively low temperatures generally in the range 70 to 130 DEG C. Layers 14,15 are outer coverings with high colour (jetness) and minimum change to electrical resistance at those temperatures where layers 12,13 fluidise. Layers 12,13 are connected to an electrical monitor circuit 23 to detect fluidisation therein.</p> |
