| 摘要 |
A fabric is disclosed which comprises crossing yarns (36, 40), which can be the warp and the weft of a woven fabric, and in which at their crossing points, or nodes, the yarns are welded to one another. Apparatus for welding the crossing yams by heat and by pressure is also disclosed. The apparatus in one form comprises a head (38) which feeds out a weft yarn (40) as the head crosses a number of warp yarns (36). An acoustic horn (42) and anvil (30) are provided for welding the nodes together immediately after the weft (40) has been fed out. The anvil is serrated to provide sloping supporting surfaces (32) and buttress surfaces (34) against which the yarn (36) is pressed by the yarns (40) as the horn passes over each yarn (36). |
