Agence Nationale De Valorisation De La Recherche

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Agence Nationale De Valorisation De La Recherche (anvar)

Institut Textile De France

Institut Textile Boulogne-sur De France

Jean-Louis Neveu

Gerard Berliet

Angelo Dervissoglou

Sylvio Melancon

An improved fibrous scouring material is disclosed, that material comprising a fibrous band in the form of a three-dimensional lattice of drawn irregular fibers obtained from a plastic bilaminar film, those fibers being helically crimped and self-bonded together at their mutual contact points, the helically crimped fibers exhibiting sharp corner-edges and being interconnected by helically crimped fibrils. The thickness of the fibers is typically between 100 and 200 microns. The process for manufacturing such scouring material is also disclosed, which process includes steps of extruding a bilaminar film, drawing and fibrillating the film, stacking the fibrillated lattice and thermally treating same to induce crimping and self-bonding.

Scouring material

A method for producing crimped textile elements by extruding a bilaminate film each face of which comprises a different thermoplastic macromolecular polymer and one face of which comprises a mixture of such a polymer with a vinyl copolymer, orienting the bilaminate film by stretching, and then fibrillating the oriented film. The fibrillated film may be chopped into discontinuous fibers. The crimped products include fibrillated webs or sheets, continuous filaments and short fibers.

Method for manufacturing crimped textile elements by fibrillation of

Apparatus for the production of yarn having a potential crimp which is achieved by varying the viscosity gradient in the mass of polymer upstream of the spinneret. The apparatus includes means for feeding polymer under pressure, a block which is connected to the outlet of the feeding means and a spinning head, including a spinneret formed with at least one row of holes, the spinning head being mounted on the block. At least one passage is defined through the block, for the passage of polymer from the feeding means to the spinneret, this passage having a frusto-conical upstream portion which converges in a downstream direction towards the spinneret. Heating or cooling means are provided on the block for imparting to the polymer, as it passes through the passage, a temperature differential between the polymer at the center of the passage and the polymer at the walls of the passage. Means are also provided for receiving and possibly drafting the yarn which has been extruded through the spinneret.

Apparatus for the production of a yarn having a potential crimp

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Lozanne, France

Jean-Louis Neveu