| 摘要 |
A multi-layered wiper and method of making it, the wiper having at least one strong surface region of fibers having a predominate length of less than one-fourth inch and having bonding material disposed therein in a fine spaced apart pattern, the areas in the strong surface region where the bonding material is disposed being finely creped and at least one inner core region of fibers having a predominate length of less than one-fourth inch and generally having less fiber concentration than the surface region, and at least one interior strong region of fibers having a predominate length of less than one-fourth inch and having a greater fiber concentration than in the inner core region and having bonding material disposed therein in a fine spaced apart pattern to bond the fibers in the interior strong region together into a strong network, the bonding material in the interior strong region being substantially unconnected to the bonding material in the strong surface region and a strengthening layer comprising a web of fibrous material having a minimum wet tensile strength of about 16 ounces per inch measured in any direction, and being substantially free of apertures larger than 0.02 square inches, said strengthening layer being bonded to the exterior surface of one of the interior strong regions. |
