Flame-retardant polyester fiber with excellent dyeability and manufacturing method therefor
AssigneeToray Advanced Materials Korea Inc.
InventorSeong Su Lim
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Abstract
The present invention relates to a flame-retardant polyester fiber manufactured by using a titanium-based catalyst and an additive-type flame retardant, and relates to a flame-retardant polyester fiber with excellent dyeability characterized by generating a small amount of acetaldehyde, with excellent dyeability, and generating remarkably low contamination on a nozzle surface, and to a manufacturing method therefor.
Claims5
A flame-retardant polyester fiber with excellent dyeability that is a polyester fiber stretched from a spinning product of a flame-retardant polyester resin comprising 5.0 to 7.0 wt % of an additive-type flame retardant represented by Chemical Formula 1 below and a remainder of a polymerization product,
- wherein the polymerization product is a polymerization product of a polymerization reactant comprising an ester reactant, a heat stabilizer, and a titanium-based catalyst represented by Chemical Formula 2 below,
- wherein the additive-type flame retardant has an average molecular weight of 5,000 to 11,000,
- wherein the polyester fiber comprises:
- 10 to 20 ppm of titanium (Ti) element in the fiber;
- and
- an additive-type flame retardant represented by Chemical Formula 1 below in an amount of 0.55 to 0.75 wt. % based on the amount of phosphorus (P) element in 100 wt. % of the fiber,
- wherein the polyester fiber has a limiting oxygen index (LOI) of 30% or more as measured according to the KS M 3032 method, and
- wherein the fiber has a strength of 3.6 to 6.0 g/de:
- wherein in Chemical Formula 1 above, R is an alkylene group having 1 to 5 carbon atoms, n is an integer of 1 to 20, and m is an integer of 1 to 80;
- wherein in Chemical Formula 2 above, R1 and R2 are each independently a straight-chain alkylene group having 1 to 5 carbon atoms or a branched alkylene group having 3 to 5 carbon atoms.
A method for manufacturing a flame-retardant polyester fiber with excellent dyeability, comprising:
- step 1 of obtaining an ester reactant by reacting an acid component and a diol component;
- step 2 of preparing a polymerization product by mixing and reacting a polymerization reactant comprising the ester reactant, a heat stabilizer and a titanium-based catalyst represented by Chemical Formula 2 below;
- step 3 of removing impurities from the polymerization product;
- step 4 of preparing a flame-retardant polyester resin by mixing the polymerization product obtained in step 3 and an additive-type flame retardant represented by Chemical Formula 1 below;
- step 5 of producing a spinning product by spinning the flame-retardant polyester resin;
- and
- step 6 of stretching the spinning product to manufacture a flame-retardant polyester fiber,
- wherein the additive-type flame retardant has an average molecular weight of 5,000 to 11,000, and is comprised in an amount of 5.0 to 7.0 wt. % based on the total weight of the flame-retardant polyester resin,
- wherein the flame-retardant polyester fiber in step 6 comprises 10 to 20 ppm of titanium (Ti) element in the fiber and 0.55 to 0.75 wt % of phosphorus (P) element based on 100 wt % of the fiber,
- wherein the flame-retardant polyester fiber has a limiting oxygen index (LOI) of 30% or more as measured according to the KS M 3032 method, and
- wherein the fiber has a strength of 3.6 to 6.0 g/de:
- wherein in Chemical Formula 1 above, R is an alkylene group having 1 to 5 carbon atoms, n is an integer of 1 to 20, and m is an integer of 1 to 80,
- wherein in Chemical Formula 2 above, R1 and R2 are each independently a straight-chain alkylene group having 1 to 5 carbon atoms or a branched alkylene group having 3 to 5 carbon atoms.
Dependencies are inferred from the claim text.