Method of fabricating a lactic acid-based nonwoven material;...

B - Operations – Transporting – 32 – B

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B32B 5/00 (2006.01) D04H 1/42 (2006.01) D04H 1/54 (2006.01)

Patent

CA 2160313

L'invention concerne un procédé pour la fabrication d'une nappe de non-tissé à partir de filaments de polymères fondus, du type comportant les étapes de filature du ou des polymères, de refroidissement, d'étirage, de dépose de fibres sur un tapis et de soudage desdites fibres par calandrage pour forme ladite nappe de non-tissé ( 15), caractérisé en ce qu'il comporte en outre un traitement (13, 14) de fixation-ajustement du taux de cristallinité et de la tension interne des fibres composant la nappe de non-tissé. L'invention porte également sur les non-tissés obtenus par le procédé et sur lesinstallations de mise en oeuvre.

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