relates to the chemical solvent system used to extract the fibre, so regenerated fibres are part natural and part artificial. the first man-made fibers which were developed and produced used polymers of natural origin, more precisely of cellulose which is a raw material available in large quantities...
subjected. for low-current stresses, a secutex® h needle-punched nonwoven geotextile or a secutex® h sand mat can be placed on the sandy dam core and covered with riprap. for mediumcurrent stresses, it is recommended that the dam core is reinforced with two or three layers of secutex® soft rock sand containers...