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US 2001/0033774 A1Published application
Geotextile structure for filtration
AssigneeBIDIM Grosynthetics S.A.
InventorsPHILIPPE DELMAS, OLIVIER ARTIERES
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Abstract
This invention relates to a geotextile structure for filtration, which comprises: a lower layer of geotextile material for filtration presenting a number of constrictions n included between 15 and 40 and made of synthetic filaments or fibers presenting a count D (decitex); and an upper layer of geotextile material for protection, presenting constrictions more open that the lower layer and made of synthetic filaments or fibers presenting a count at least equal to 2D (decitex), said upper and lower layers being bonded to each other.
Claims4
Geotextile structure for filtration, wherein it comprises:
- a lower layer of geotextile material for filtration presenting a number of constrictions n included between 15 and 40 and made of synthetic filaments or fibers presenting a count D (decitex);
- and
- an upper layer of geotextile material for protection, presenting constrictions more open that the lower layer and made of synthetic filaments or fibers presenting a count at least equal to 2D (decitex), said upper and lower layers being bonded to each other.
Dependencies are inferred from the claim text.