| 摘要 |
<p>DISPOSABLE DIAPER HAVING READILY FLUSHABLE ABSORBENT MEDIA AND IMPROVED PAD INTEGRITY IN USE Robert C. Duncan A disposable diaper is provided with an absorbent pad comprised of airfelt or a similar low-strength absorbent material enclosed by an envelope of wet strength tissue. The absorbent pad is preferably enclosed between a liquid-retaining backsheet and a liquid-pervious topsheet secured in superposed relation to the liquid-retaining backsheet. Because the wet strength tissue envelope surrounding the absorbent core material tends to cling to the wetted pad after removal of the liquid-retaining backsheet, it tends to prevent hydraulic erosion of the absorbent media and therefore interferes with pad flushability. If a non-wet strength tissue is utilized on one or both sides of the absorbent media it will readily dissociate upon immersion in water and thereby promote pad flushability. However, such an absorbent pad lacks integrity in use due to the low strength of the absorbent media employed. In accordance with the present invention, wet strength tissue is utilized on both surfaces of the absorbent pad to provide support for the low strength absorbent media and, accordingly, improved in use pad integrity without adversely affecting pad flushability. This is preferably accomplished by adhering the layer of wet strength tissue adjacent the liquid-retaining backsheet directly to the backsheet so that when the liquidretaining backsheet is stripped from the diaper prior to flushing, a broad central panel of the wet strength tissue envelope is removed from the absorbent pad to expose the absorbent media contained therein to hydraulic erosion during the rinsing operation.</p> |
