Patent ID: 6270623
Filing Date: 2001-08-07
Classification: A61F,D21H,Y10T

Abstract:
A method for making an apertured nonwoven fabric containing thermoplastic synthetic microfibers, said method comprising the steps of:a. providing a wet sheet from a slurry containing about 0.5 to 20% by weight of thermoplastic fibers having a length of about 7 to 30 mm and a fineness of about 0.1 to 0.8 d dispersed in water;b. placing said wet sheet on a support;c. subjecting said wet sheet to high velocity water jets of about 50 to 200 kgf/cm 2 for mechanically entangling fibers of said wet sheet;d. drying said wet sheet to form a dry sheet; ande. forming a plurality of apertures having a diameter of about 0.5 to 5 mm and providing a total apertured area ratio of about 3 to 60% by piercing said dry sheet in a thickness direction with a plurality of projections each having a desired tip configuration.