Method for producing hollow injection liquid

The present invention relates to a hollow body manufacturing method by implementing a known molding technique "liquid injection molding". The manufacturing process of the hollow body of invention by the technique of liquid injection comprises injecting into a mold a composition comprising as main matrix and a thermoplastic polymer as a fibrous reinforcing filler compound form factor of L / D greater or equal to 30, and a particulate filler form factor of L / D less than 20. the thermoplastic polymer is preferably a polyamide resin, the fillers being a part of glass fibers and other glass beads or glass fibers broyees.Le method of the invention can be manufactured by liquid injection tubing or conduit for fluids such as fuel, coolant.