| 摘要 |
The subject of the invention is a composite material 1 essentially comprising a mixture 12 of a water-expandable powder and a heat-bonding powder, held as a sandwich between two flat solid supports 10, 11, one at least of which is at least partially water-soluble. This material is useful in agriculture, medicine, surgery, in the field of hygiene and in the cable industry, especially electrical cable industry. In this application, when water penetrates into the cable, the at least partially water-soluble support(s) release(s) the water-expandable powder which rapidly forms a packing 13 blocking the propagation of water into the cable. <IMAGE> |
