| 摘要 |
The invention relates to a sheet element (<bold>10</highlight>) that has integrated therewith an alarm mat (<bold>2</highlight>) and that is intended particularly for security containers and security spaces. The alarm mat (<bold>2</highlight>) is comprised of light-conducting and/or current-conducting filaments or like devices. The alarm mat (<bold>2</highlight>) includes a base mat (<bold>2</highlight><italic>a</highlight>) and a supplemental mat (<bold>2</highlight><italic>b</highlight>). The base mat (<bold>2</highlight><italic>a</highlight>) has an essentially looped filament pattern of the kind, for instance, obtained with knitting or crocheting. The supplemental mat (<bold>3</highlight><italic>b</highlight>) has a regular or irregular filament pattern. The base mat (<bold>2</highlight><italic>a</highlight>) and the supplemental mat (<bold>2</highlight><italic>b</highlight>) are tightly positioned together to form an alarm mat, wherewith the filament pattern of the base mat (<bold>2</highlight><italic>a</highlight>) and the filament pattern of the supplemental mat (<bold>2</highlight><italic>b</highlight>) deviate from totally coincidental overlap. The invention also relates to the use of the sheet element (<bold>10</highlight>) as casing material in a container (<bold>20</highlight>) or in a space intended for the storage of theft-attractive objects or the like.
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