Method and device for producing a nonwoven geotextile, and geotextile thus produced

Abstract

A nonwoven geotextile includes: crushed plant stems ( 305 ) more than five millimeters in diameter; plant stem fragments ( 310 ); and plant fibers ( 315 ) partially attached to the crushed stems, wherein the plant stems and the plant stem fragments are interwoven by element of mechanical connections produced by spraying water. In preferred embodiments, the plants include hemp. The device for producing such a nonwoven geotextile includes: elements for arranging plants into a mat including crushed plant stems more than five millimeters in diameter, plant stem fragments and plant fibers partially attached to the crushed stems; and elements for spraying water onto the mat so as to form mechanical connections between the crushed plant stems, the plant stem fragments and the plant fibers of the mat.

1 - 16 . (canceled) 
     
     
         17 . Nonwoven geotextile, that comprises:
 crushed plant stems more than five millimeters in diameter,   plant stem fragments, and   plant fibers partially attached to said crushed stems, wherein the plant stems and the plant stem fragments are interwoven by means of mechanical connections produced by spraying water.   
     
     
         18 . Geotextile according to  claim 17 , wherein said plants comprise hemp. 
     
     
         19 . Geotextile according to  claim 18 , wherein the stems, stem fragments and plant fibers are coated with soil. 
     
     
         20 . Geotextile according to  claim 17 , wherein the stems, stem fragments and plant fibers are coated with soil. 
     
     
         21 . Geotextile according to  claim 20 , wherein the soil comprises clay. 
     
     
         22 . Device for producing a nonwoven geotextile, that comprises:
 a means for arranging plants into a mat comprising crushed plant stems more than five millimeters in diameter, plant stem fragments, and plant fibers partially attached to said crushed stems; and   a means for spraying water onto said mat so as to form mechanical connections between the crushed plant stems, the plant stem fragments and the plant fibers of said mat.   
     
     
         23 . Device according to  claim 22 , wherein said plants comprise hemp. 
     
     
         24 . Device according to  claim 23 , that comprises a means of coating the plant fiber mat with soil. 
     
     
         25 . Device according to  claim 22 , that comprises a means of coating the plant fiber mat with soil. 
     
     
         26 . Device according to  claim 25 , wherein the means of coating the plant fiber mat is designed to coat the plant fiber mat with soil comprising clay. 
     
     
         27 . Device according to  claim 22 , wherein the means for arranging plants into a mat of plant fibers comprises a means of crushing and/or carding plants. 
     
     
         28 . Device according to  claim 22 , wherein the means for arranging plants into a plant fiber mat comprises a means of orienting fibers according to at least two different orientations, through the vibrating action of a carrier. 
     
     
         29 . Device according to  claim 22 , wherein the means for arranging plants into a plant fiber mat comprises a means of orienting fibers according to at least two different orientations by intersecting supply paths. 
     
     
         30 . Device according to  claim 22 , wherein the means for arranging plants into a plant fiber mat comprises a device for incorporating ropes or cables, parallel to the greatest length of the mat, intended to serve as guides. 
     
     
         31 . Device according to  claim 22 , wherein the means for arranging plants into a plant fiber mat comprises a means of equalizing the thickness of the plant fiber mat. 
     
     
         32 . Method for producing a nonwoven geotextile, that comprises:
 a step of arranging plants into a mat comprising crushed plant stems more than five millimeters in diameter, plant stem fragments, and plant fibers partially attached to said crushed stems; and   a step of spraying water onto said mat so as to form mechanical connections between the crushed plant stems, the plant stem fragments and the plant fibers of said mat.   
     
     
         33 . Method according to  claim 32 , wherein said plants comprise hemp. 
     
     
         34 . Method according to  claim 33 , that comprises a step of coating the plant fiber mat with soil. 
     
     
         35 . Method according to  claim 32 , that comprises a step of coating the plant fiber mat with soil. 
     
     
         36 . Method according to  claim 35 , wherein, during the plant fiber mat coating step, the plant fiber mat is coated with soil comprising clay.