| 摘要 |
PCT No. PCT/FI82/00001 Sec. 371 Date Sep. 13, 1982 Sec. 102(e) Date Sep. 13, 1982 PCT Filed Jan. 6, 1982 PCT Pub. No. WO82/02412 PCT Pub. Date Jul. 22, 1982.A seamed non-woven fabric consisting of at least two thermoplastic non-woven fabric strips (1, 2) positioned side by side in the same plane, said strips of fabric being joined together at their opposite longitudinal edges by means of a melt seam. The edges of the strips to be joined together have been melt-shrunk into such a thickness that the thickness of the seam (4) formed by the joined edge portions (1b, 2b) of the strips does not exceed the thickness of the other portions of the strips. The strips of fabric are, at least at the edges to be joined together, provided with reinforcement yarns (3) parallel to said edges, the melting point of said yarns being higher than the melting temperature used during the melt-seaming. The reinforcement yarns provide in the seam a high strength in the longitudinal direction in spite of the melting of the edge portions of the strips. In the method of making such a non-woven fabric the edge portions of the strips of fabric are heated to a melting temperature, which is higher than the melting point of the fibrous material of the strips of fabric but lower than the melting point of the reinforcement yarns, whereupon the melt-shrunk edges of the strips are pressed together to make a seam having the same thickness as the other portions of the strips. |
