TUBE RESTORABLE UPON HEATING Russian patent published in 1997 - IPC

FIELD: polymer fibers. SUBSTANCE: invention relates to tubes which cover objects with variable cross- section, for example, pipes or cables, or pipe junctions and nods. Tube is manufactured from heat-stable and restorable on heating fibers woven into cloth covered at least on one side by heat-stable polymer material fibers from 1 to 10 per 1 cm, arranged in the same direction in the cloth. Number of restorable on heating fibers in cloth is 10 to 20 per 1 cm, which are arranged in another direction, and 1 to 4 per 1 cm, which are arranged in the same direction with heat-stable fibers. Cloth has structure of serge with coefficient of one-direction size restoration on heating at least 60%. Coefficient is chosen equal to at least 70%. Protective tube has connection piece attached to one end of the tube by means of mechanical piercing or stitching, or joining with clamps or rivets allowing joining this tube end with another tube end or with attachment for closing tube. Non-remoted stress in cloth for 100% restoration is 0.185-0.3 MPa, and that for 30% restoration at least 0.0142 MPa. Restorable on heating fibers are made of polyethylene, and thermally stable ones of glass. EFFECT: improved consumer quality of tube. 8 cl, 4 dwg, 1 tbl