Melt spinning colored polycondensation polymers

Details Melt spinning colored polycondensation polymers Melt spinning colored polycondensation polymers

D - Textiles, Paper

01

F

D01F 1/04 (2006.01) D01F 1/06 (2006.01) D01F 6/60 (2006.01) D01F 6/62 (2006.01)

Patent

CA 2304193

The invention is a method of coloring melt spun condensation polymers while avoiding hydrolytic degradation and maintaining the melt viscosity of the polymer. The method comprises adding a liquid dispersion of a colorant to the melt phase of a condensation polymer, and in which the amount and type of the liquid in the dispersion will not substantially affect the melt viscosity of the condensation polymer; and thereafter spinning the colored melt phase condensation polymer into filament form. In another aspect the invention is a polyester filament comprising polyethylene terephthalate, a colorant, and a nonaqueous organic liquid that is soluble in melt phase polyester, and has a boiling point above 300 ~C, but that otherwise does not modify the polymer chain.

L'invention concerne un procédé permettant de colorer des polymères de condensation filés par fusion tout en évitant la dégradation hydrolytique du polymère et en maintenant sa viscosité à l'état fondu. Ce procédé consiste à ajouter une dispersion liquide d'un colorant à la phase fondue d'un polymère de condensation, la quantité et le type du liquide de la dispersion n'affectant pas sensiblement la viscosité à l'état fondu de ce polymère de condensation; et, ensuite, à filer le polymère de condensation coloré en phase fondue en vue de former un filament. Selon un autre mode de réalisation, cette invention traite d'un filament de polyester renfermant du téréphtalate de polyéthylène, un colorant, un liquide organique non aqueux soluble dans un polyester en phase fondue et dont le point d'ébullition est supérieur à 300 ·C, mais qui ne modifie pas la chaîne du polymère.

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