Vlieslappen und Verfahren zur Herstellung

摘要

A nonwoven web (1) useful for a wiper (2) has an oil capacity greater than about 500 percent by weight of oil to the weight of the web. The wiper includes a nonwoven web of fibers having at least one raised surface area (3) which area has an aperture (4) through the web. The fibers generally adjacent the aperture are substantially unconsolidated, i.e., not compacted together or fused. A method of forming such a nonwoven wiper includes the steps of: a) providing a nonwoven web; b) providing a nip roller arrangement including a first roller having a plurality of unheated pins and a second roller having a plurality of corresponding orifices; and c) passing the web through the nip roller arrangement to form a plurality of raised surface areas on the web with each of the surface areas defining an aperture where the fibers generally adjacent the aperture are substantially unconsolidated.