Typically, staple fibers are needle-punched from one side only. The needle design, punch density and depth of punch are additional variables which may affect the pore-size distribution of a geotextile (Kulter 1985).
Typically, staple fibers are needle-punched from one side only. The needle design, punchdensity and depth of punch are additional variables which may affect the pore-size distributionof a geotextile (Kulter 1985).