| 摘要 |
FIELD: optical cables. ^ SUBSTANCE: optical cable contains element for transferring optical signals, and structure capable of protecting aforementioned element. Aforementioned structure is a multi-layered structure and is positioned in position, radially external relatively to aforementioned one element, and contains: a) one first protective layer of polymer material in position, radially external relatively to aforementioned element; b) one protective layer of foamed polymer material in position, radially external relatively to aforementioned first protective layer, and c) one second protective layer of polymer material in position, radially external relatively to aforementioned protective layer of foamed polymer material. Foamed polymer material has density ranging from 0,3 to 0,7 kg/dm3 and stretching resilience module ranging from 300 to 700 MPa at 20°C. ^ EFFECT: increased resistance of cable to impact and compression, increased flexibility of cable. ^ 4 cl, 5 dwg
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