Polyester paralleling composite yarn and prepared method thereof
A composite yarn and polyester technology, applied in the fiber field, can solve the problems of damaged composite yarn elasticity, insufficient dyeing, etc.
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[0070] In the method for preparing a polyester side-by-side composite yarn as described above, the intrinsic viscosity [η] of the PBT chips is 1.10-1.30dl / g; the intrinsic viscosity [η] of the modified polyester PET chips is 0.64~ 0.75dl / g;
[0071] In the method for preparing a polyester parallel composite yarn as described above, the weight ratio of PBT to PET in the composite yarn is 4:6-6:4.
[0072] Dyeing method: The disperse dyes used for dyeing are Disperse Red 3B, Disperse Blue SE-2R Disperse Turquoise Blue S-GL, and the fibers are dyed in a high temperature and high pressure machine. Before dyeing, the fiber was treated with a nonionic surfactant at 60°C for 30 minutes. The amount of dye is 2.0% (owf); dispersant NNO is 1.2g / L, pH value is 5, bath ratio is 1:50, 60℃ human dyeing, heating to 90℃, 100℃, 110℃, 120℃ each constant temperature dyeing 1h.
[0073] The percentage of dye uptake is determined by the residual liquid colorimetric method. The appropriate amount of dy...
Embodiment 1
[0077] A preparation method of polyester parallel composite yarn, including the following steps:
[0078] (1) Preparation of amino fatty acid glycol ester:
[0079] 1) Add dodecane dicarboxylic acid and methanol into the reactor in a molar ratio of 1:1.5, heated to 80°C under the catalysis of concentrated sulfuric acid, reflux esterification, cooling, separation and purification to obtain dodecane dicarboxylic acid Monomethyl acid; the concentrated sulfuric acid refers to sulfuric acid with a mass concentration of 70%, and the added amount of concentrated sulfuric acid is 3wt% of dodecane dicarboxylic acid;
[0080] 2) The monomethyl dodecane dicarboxylate, lead tetraacetate and lithium bromide are dissolved in benzene (molar ratio 1:1:1), wherein the concentration of monomethyl dodecane dicarboxylate is 0.05 mol / L , In a nitrogen atmosphere, react at 80°C and reflux. When no more gas is generated, add a certain amount of dilute sulfuric acid to react for 2 hours, then wash, purify ...
Embodiment 2
[0103] A preparation method of polyester parallel composite yarn, including the following steps:
[0104] (1) Preparation of amino fatty acid glycol ester:
[0105] 1) Put penictodecane dicarboxylic acid and methanol into the reactor in a molar ratio of 1:1.5, catalyzed by concentrated sulfuric acid, heated to 110°C, refluxed for esterification, cooled, and separated and purified to obtain penicodecane Monomethyl dicarboxylate; the concentrated sulfuric acid refers to sulfuric acid with a mass concentration of 70%, and the added amount of concentrated sulfuric acid is 3wt% of Pentadodecane dicarboxylic acid;
[0106] 2) Dissolve the pentadodecane dicarboxylic acid monomethyl ester, lead tetraacetate and lithium bromide in benzene (molar ratio 1:1:1), wherein the concentration of pentadodecane dicarboxylic acid monomethyl ester is 0.07 mol / L, under nitrogen atmosphere, react at 85℃, reflux, when no more gas is generated, add a certain amount of dilute sulfuric acid to react for 3 ho...
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