Process for manufacturing a composite base fabric intended for the reinforcement of a waistband and composite base fabric thus obtained

A process for manufacturing a composite base fabric for the reinforcement of a waistband and which is elastic in the direction of the warp, which comprises;

• A. knitting
• (i ). a warp knit fabric;
• (ii). a fabric substrate inserted in the warp knit fabric;
• (iii ). elastic yarns which under a tensional elastic deformation said elastic yarns being inserted in the warp knit fabric substantially parallel to the fabric wales;
• and
• iv. weft yarns inserted in the warp knit fabric without participating in the formation of its stitches;
• B. thermofixing the composite base fabric;
• C. depositing a film forming coating comprising a cross-linkable resin on the fabric substrate in contact with the elastic yarns and the weft yarns;
• D. drying and cross-linking the film forming coating fixing the weft yarns on the fabric substrate;
• and
• E. submitting the composite base fabric to a relaxation treatment to slacken the elastic yarns;
• wherein during knitting the elastic yarns are submitted to a tensional elastic deformation by using a feeding rate for the elastic yarns less than the feeding rate of the fabric substrate insertion.