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Colored figured sea-island composite ultrafine short fiber and preparation method thereof

A technology of fine short fibers and islands in the sea, applied in the field of polyester chemical industry, can solve the problems of increased dyeing process, poor color fastness of colored fibers, and increased production costs, so as to achieve lower production costs, high color fastness, and better dyeing performance Effect

Active Publication Date: 2013-05-22
JIANGSU JIANGNAN HIGH POLYMER FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the superfine fibers produced by the sea-island method are all white in the market, and the downstream production must increase the dyeing process, which increases the production cost, and the color fastness of the colored fibers obtained through the dyeing process is poor.

Method used

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  • Colored figured sea-island composite ultrafine short fiber and preparation method thereof
  • Colored figured sea-island composite ultrafine short fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Preparation of modified PET

[0021] The purified terephthalic acid and ethylene glycol are mixed and beaten in a molar ratio of 1.2:1, and antimony trioxide, tripotassium phosphate and cobalt acetate are added to the slurry, and then enter the esterification kettle for esterification reaction. The inner temperature of the esterification reaction temperature is controlled at 253±2°C, the end point of the reaction is determined according to the water output of the esterification, and the esterified product is sent to the polycondensation kettle. The PEG with a molecular weight of 7000 is melted into a solution with saturated steam at 180°C, and then added to a polycondensation kettle in a proportion of 0.5% of the weight of the esterified product to carry out the polycondensation reaction. The polycondensation reaction is in the low vacuum stage, and the temperature is controlled at 250 ± 2 °C, and the high vacuum stage , the temperature is controlled at 276±2℃. Aft...

Embodiment 2

[0025] (1) Preparation of modified PET

[0026] The molar ratio of purified terephthalic acid and ethylene glycol in Example 1 was changed to 1.3:1, the molecular weight of PEG was changed to 6000, and the amount of PEG added was changed to 0.6%. same.

[0027] (2) Preparation of colored island-type sea-island composite ultrafine short fibers

[0028]The pigmented PET masterbatch with a pigment content of 1.5% and the modified PET chips obtained above were mixed uniformly in a mass ratio of 9:91. As the island component, the island component and the sea component were pre-crystallized, dried (pre-crystallized The temperature is 67°C, the time is 2h, the drying temperature is 145°C, the time is 18h, and the water content of the two components after drying is less than 30ppm), then melted, extruded, and fed into two components by a twin-screw extruder. a box. The temperature of the four temperature control zones of the screw extruder of the sea component and the temperature o...

Embodiment 3

[0030] (1) Preparation of modified PET

[0031] The molar ratio of purified terephthalic acid and ethylene glycol in Example 1 was changed to 1.4:1, the molecular weight of PEG was changed to 5000, and the amount of PEG added was changed to 0.7%. same.

[0032] (2) Preparation of colored island-type sea-island composite ultrafine short fibers

[0033] The pigmented PET masterbatch with a pigment content of 1.5% and the modified PET chips prepared above were mixed uniformly in a mass ratio of 11:89. As the island component, the island component and the sea component were pre-crystallized and dried (pre-crystallized). The temperature is 67°C, the time is 2h, the drying temperature is 145°C, the time is 18h, and the water content of the two components after drying is less than 30ppm), then melted, extruded, and fed into two components by a twin-screw extruder. a box. The temperature of the four temperature control zones of the screw extruder of the sea component and the temper...

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Abstract

The invention relates to a colored figured sea-island composite ultrafine short fiber. The section is round and comprises island components and sea components; the mass ratio of the island components to the sea components is (60-75):(25-40); the island components are evenly distributed in the sea components; the sea components are CO-PET (copolyester); and the island components are prepared from modified PET (polyethylene terephthalate) and PET color master batches in a mixing manner. The preparation method comprises the steps of pre-crystallizing and dying the island components and the sea islands, fusing and extruding by a twin screw extruder respectively and feeding to two box bodies, and metering through a metering pump respectively to enter a spinning component in common; spraying the mixed melt in the spinning component from a spinneret plate; oiling to wind after laterally blowing, cooling and molding, bundling, entering into an oil bath groove to stretch, crimping, sizing and baking through hot steam, and finally cutting off and packing tows. The short fiber disclosed by the invention is better in dye performance because the island components are modified; and the prepared color fiber is more bright-colored than the common dye fiber in color, and high in color fastness.

Description

technical field [0001] The invention relates to an island-shaped sea-island composite ultrafine short fiber, in particular to a colored island-shaped sea-island composite ultrafine short fiber, and belongs to the technical field of polyester chemical industry. Background technique [0002] Colored fibers are often used in apparel fabrics and ultra-real leather products to impart a certain color to the product or specific parts of the product for aesthetic or identification purposes. At present, the ultrafine fibers prepared by the island-type sea-island method on the market are all white, and the downstream production needs to increase the dyeing process, which increases the production cost, and the color fastness of the colored fibers obtained through the dyeing process is poor. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to solve the deficiencies of the prior art, and to provide a colored island-type sea-island composite ultrafine short fibe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/14C08G63/672C08G63/86D01D5/26D01D1/04D01D10/06
Inventor 浦金龙
Owner JIANGSU JIANGNAN HIGH POLYMER FIBER
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