| 摘要 |
<p>An apertured nonwoven laminate is produced by a thermal aperturing process by calendering a carded web of fibers with a polymeric sheet having a lower melting temperature and a property of shrinking under application of heat and pressure so as to bond to the carded fibers and simultaneously pull back the carded fibers away from the calendering points to generate apertures through the nonwoven laminate. In a preferred apertured nonwoven product for baby wipes, a tri-laminate is formed with top and bottom layers containing polypropylene fibers or fiber blend with rayon fibers, and a middle (polymeric) layer of linear low density polyethylene (LLDPE) film material. As shown in the figure, the result is that the film (12) and the fibers of the carded webs (10a, 10b) become fused to each other, forming a crusted ring of fused matter (32). This crusted ring serves to simultaneously bond the layers together.</p> |
