Soluble thermokalite polyester fibre preparation

A polyester fiber and soluble technology, which is used in the manufacture of modified polyester fibers, can solve the problems of high-speed spinning, serious chip bonding, and low polyester softening point.

Inactive Publication Date: 2003-09-03
济南正昊化纤新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These copolyesters have many modified components, resulting in a low softening point of the polyester. It is ...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation of easy alkali hydrolysis polyester: 1000kg purified terephthalic acid (PTA), 60kg (5.67% mole) isophthalic acid (IPA), 500kg ethylene glycol (EG), polymerization catalyst antimony trioxide 0.32kg input Beating in the beating tank, after beating evenly, enter the esterification tank continuously, and esterify at a temperature of 250--260°C under normal pressure, after the esterification effluent is 220kg, move it into the polymerization tank, add 140kg (6.0% mole) of 5-sodium sulfonate- Ethylene glycol isophthalate (SIPE), stirring for 30 minutes, adding 120kg (9.0%) of polyethylene glycol (PEG) with an average molecular weight of 4000 and adding tetrakis[β-(3,5-di-tert-butyl -4-hydroxyphenyl) propionic acid] pentaerythritol ester (antioxidant 1010): 0.4kg (0.03%), cobalt acetate 0.2kg (0.015%), trimethyl phosphate 0.2kg (0.015%), stirred for 30 minutes, In low vacuum, the temperature is 240--270 ℃ for pre-condensation, and in high vacuum (less than 100P...

Embodiment 2

[0032] Embodiment 2: As described in Embodiment 1, the difference is that,

[0033] The preparation of the fiber is: under the spinning conditions of screw temperature 286°C, spinning speed 2800 m / min, and wind speed 0.5 m / s, a POY fiber with a fineness of 210dtex / 36f, a strength of 1.19CN / dtex, and an elongation of 145% was obtained. .

[0034] The above-mentioned POY fiber is a DT fiber with a fineness of 105dtex / 36f, a strength of 2.1CN / dtex, and an elongation of 20% under the conditions of a spinning speed of 600 m / min, a drafting temperature of 80°C, a draft ratio of 1.75 times, and a heat setting temperature of 186°C. .

[0035] The DT fiber was subjected to an alkali dissolution experiment with 1.5% sodium hydroxide aqueous solution (bath ratio 50, temperature 100° C.), and it could be completely dissolved within 8 minutes.

Embodiment 3

[0036] Embodiment 3: As described in Example 1, the difference is that the preparation of the fiber is: the spinning condition is that the screw temperature is 286 ° C, the spinning speed is 2800 m / min, and the fineness 210dtex is obtained under the condition of wind speed 0.5 m / s / 36f, POY fiber with strength of 1.19CN / dtex and elongation of 145%.

[0037] The above-mentioned POY fiber is 110dtex / 36f in fineness, 1.80CN / dtex in strength, elongation 24% DTY fibers. The DTY fiber was subjected to an alkali dissolution experiment with 1.5% sodium hydroxide aqueous solution (bath ratio 50, temperature 100° C.), and it could be completely dissolved within 10 minutes.

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PUM

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Abstract

A hot alkali-soluble polyester fibre is prepared through adding 5-sodium sulfonate-ethanediol metaphenyl diformate (SIPE), metaphenyl diformic acid (IPA) and polyethanediol, drying, fusing, spinning, and stretching or thermal deforming to obtain preoriented yarn (POY), drafted yarn (DY), or low-elasticity yarn. Its advantages are high solubility in alkali solution and spinnability and low viscosity.

Description

(1) Technical field [0001] The invention relates to a method for producing modified polyester fiber, in particular to a method for preparing polyester fiber which is easily soluble in hot alkali solution and can be easily prepared by conventional polymerization and spinning equipment, and belongs to the technical field of chemical fiber. (2) Background technology [0002] Water-soluble fibers and conventional fibers are used to form composite filaments for weaving, and then the water-soluble fibers are removed by solvent treatment to increase the gaps between the fibers and are used to manufacture special-style fabrics. Research has been carried out on water-soluble polyester fibers. For example, it is proposed to add 8-6 mol% of 5-sulfonate-isophthalic acid component, 5-20 mol% of The modified polyester prepared by phthalic acid and 5-20 mole percent aliphatic dibasic acid is used as a single component to prepare water-soluble polyester fiber. JP-4-327209 communiqué propos...

Claims

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Application Information

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IPC IPC(8): D01D5/08D01F6/62
Inventor 王国德孙寒松郭华秦庆才蒋开杰
Owner 济南正昊化纤新材料有限公司
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