Topsheet for use in disposable body fluid absorptive articles

摘要

The invention comprises a topsheet for use in body fluid absorptive articles and, method and apparatus for making the same so improved that collapse and clogging of liquid passages may be reliably avoided. To this end, the topsheet (2) comprises an upper sheet (7) provided with a skin-contacting area (14) and liquid passages (13) and a lower-sheet (8) provided with a skin-non-contacting area (15), an area (16) welded to the liquid passages (13) and an exposed area (25). The area (25) is welded to each of the liquid passages (13) around its lower opening (12) so as to protect this liquid passage (13) against collapse and clogging. The exposed area (25) defines a skin-contacting surface (18) which rises up into each of the liquid passages (13) but not beyond the upper surface of the skin-contacting area (14). The upper sheet (7) cooperates with the lower sheet (8) to define cavities (20) extending in the direction of the topsheet's thickness. The topsheet (2) can bemade by blowing molten fibres from a melt blow extruder used to form the lower sheet against the lower side of the upper sheet formed by a melt blow extruder used to form the upper sheet.