The non-woven geotextiles are made from continuous polypropylene (PP) filament that are tangled together in a needle punched process. The continuous filament achieve their strength and dimensional stability by interlocking. It has three-dimensional structures and offered the functions of filtration, separation, protection, and drainage. It is widely used at drainage systems to filter soil particles and prevent the loss of soil particles, also as a wrapping for perforated pipe, for erosion protection, for the separation of a roads sub base and base course. The textiles are inert to biological degradation and resistant to chemicals, alkalis, and acids.

Specification: GB/T17638-1998