Thermobonded and perforated nonwoven
The present invention relates to a method for the manufacture of a perforated nonwoven material, whereby a prebonded nonwoven with embossing points is guided to a nonwoven perforation device, needles of a needle roller engage into the prebonded nonwoven and perforate it, and the perforated nonwoven material then undergoes further processing. A ratio is set between the number of needles to the number of embossed points of between 0.15 and 0.25 and a ratio of hole size to embossed point size of between 0.15 and 0.25.
1. A method for manufacturing a perforated nonwoven material, wherein a prebonded nonwoven with embossed points is conducted to a nonwoven perforating device and needles of a needle roller engage the prebonded nonwoven and perforate it to form at least substantially round holes, and the perforated material then undergoes further processing, wherein the ratio between the number of perforations to the number of embossed points is between 0.15 and 0.25 , the ratio between the size of the holes and the size of the embossed points is between 0.15 and 0.25, the nonwoven is thermobonded with a number of embossed figures between 43 to 80 figures per cm 2 , wherein between 10 perforations per cm 2 and 25 perforations per cm 2 are created in the nonwoven, wherein an almost round hole size of between 0.8 cm 2 and 1.8 mm 2 is created in the nonwoven, whereby the embossed points surrounding the at least substantially round holes, each comprises a bonding area between 0.15 to 0.4mm 2 .
2. The method according to claim 1 , wherein the nonwoven is thermobonded with a number of embossed points between 55 points/cm 2 and 80 points/cm 2 .