Fibres of strongly branched polyamide

Details Fibres of strongly branched polyamide Fibres of strongly branched polyamide

D - Textiles, Paper

01

F

D01F 6/60 (2006.01) C08G 69/08 (2006.01) C08G 69/14 (2006.01) C08G 69/16 (2006.01) C08G 69/36 (2006.01) C08L 77/02 (2006.01)

Patent

CA 2257388

The invention relates to a polyamide fibre whose polyamide is heavily branched. The branched polyamide preferably has 3-20 branches which are joined to a core molecule which is smaller than the polyamide arms. The arms originate preferably from functional groups which are identical and are preferably carboxyl groups. The polyamide is chosen from the group of polyamides which are produced by polycondensation of .alpha.,.omega.- aminocarboxylic acids or by ring-opening polymerization of lactams. Preferably, the polyamide is nylon-6. The properties of the fibre according to the invention are at least at the same level as those of fibres obtained by spinning linear polyamide. The spinning process for the fibre according to the invention is less susceptible to faults. Inter alia, the viscosity of the polyamide no longer changes during the spinning process.

L'invention concerne une fibre en polyamide dont le polyamide est fortement ramifié. Le polyamide ramifié présente de préférence 3 à 20 ramifications jointes à une molécule de coeur, laquelle est plus petite que les bras de polyamide. Les bras proviennent de préférence de groupes fonctionnels, lesquels sont identiques et sont de préférence des groupes carboxyle. Le polyamide est choisi dans le groupe de polyamides produits par polycondensation d'acides .alpha.,.omega. aminocarboxyliques ou par polymérisation de lactames à ouverture de cycle. De préférence, le polyamide est du nylon-6. Les propriétés de la fibre selon l'invention sont au moins du même niveau que celles de fibres obtenues par filage de polyamide linéaire. Le procédé de filage de la fibre selon l'invention est moins susceptible de présenter des défauts. Entre autres, la viscosité du polyamide ne change plus pendant le processus de filage.

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