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Melt spinning method of superfine denier spandex fibers through reaction in single static reaction kettle

A technology of spandex fiber and reactor, which is applied in the direction of melt spinning, fiber treatment, fiber chemical characteristics, etc., to achieve the effects of improved elongation and uniformity, high water absorption, and soft fiber feel

Inactive Publication Date: 2011-06-01
TAICANG JINXIANG SPANDEX FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the specifications of spandex fibers on the market include ultra-fine denier series (above 5D and below 20D) and conventional series (above 20D). There are only regular series of products, so the superfine denier series of melt direct spinning has always been a gap

Method used

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  • Melt spinning method of superfine denier spandex fibers through reaction in single static reaction kettle
  • Melt spinning method of superfine denier spandex fibers through reaction in single static reaction kettle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1. Take 75 kg of polyester polyol, 20 kg of isocyanate, and 5 kg of butanediol;

[0019] 2. Negative pressure feeding, evacuate to negative 0.8MPa pressure, add polyester polyol raw material into the first purification tank through the first feeding valve set on the first purification tank, temperature 103-105 ℃, heat for 45 minutes Purify; the raw material butanediol is added into the second purification tank through the second feeding valve arranged on the second purification tank, the temperature is 106-108 ° C, and it is purified by heating for 45 minutes; the isocyanate is purified through the The third feeding valve is added to the third purification tank, the temperature is 110-112 ° C, and the heating is carried out for 50-55 minutes for purification;

[0020] 3. Add 0.8MPa nitrogen pressure, pass the raw material in the first purification tank through the first metering delivery pump, the raw material in the second purification tank through the second met...

Embodiment 2

[0027] 1. Take 62 kg of polyester polyol, 30 kg of isocyanate, and 8 kg of butanediol;

[0028] 2. Negative pressure feeding, vacuumize to negative 0.8MPa pressure, feed polyester polyol raw material into the first purification tank through the first feeding valve installed on the first purification tank, temperature 103-105 °C, heat 41- Purify in 45 minutes; the raw material butanediol is added into the second purification tank through the second feed valve installed on the second purification tank, the temperature is 106-108 ° C, and heated for 50 minutes for purification; isocyanate is purified by setting in the third purification tank Add the third feeding valve on the top into the third purification tank at a temperature of 110-112°C and heat for 53 minutes for purification;

[0029] 3. Add 0.8MPa nitrogen pressure, pass the raw material in the first purification tank through the first metering delivery pump, the raw material in the second purification tank through ...

Embodiment 3

[0036] 1. Take 70 kg of polyester polyol, 25 kg of isocyanate, and 5 kg of butanediol;

[0037] 2. Negative pressure feeding, vacuumize to negative 0.8MPa pressure, feed polyester polyol raw material into the first purification tank through the first feeding valve installed on the first purification tank, temperature 103-105 °C, heat 41- Purify in 45 minutes; the raw material butanediol is added into the second purification tank through the second feed valve installed on the second purification tank, the temperature is 106-108 ° C, and it is heated for 54 minutes for purification; isocyanate is purified by setting in the third purification tank Add the third feeding valve on the top into the third purification tank at a temperature of 110-112°C and heat for 55 minutes for purification;

[0038] 3. Add 0.8MPa nitrogen pressure, pass the raw material in the first purification tank through the first metering delivery pump, the raw material in the second purification tank th...

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PUM

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Abstract

The invention provides a melt spinning method of superfine denier spandex fibers through the reaction in a single static reaction kettle. The method is characterized by comprising the following steps: taking raw material components; feeding under a negative pressure; applying the nitrogen pressure of 0.8MPa; carrying out a high-temperature natural reaction in the static reaction kettle; conveying the materials to a double screw extruder; filtering by a melt filter; cooling the ejected silk via an air channel; applying oil by an oiling device; drawing guide silk by a two-pass silk guide roller; and curing in a drying room, detecting and packing. The obtained superfine denier spandex fibers have the advantages of small bending rigidity and particularly soft hand feeling; meanwhile the surface area of the fibers is very large, thus the coverage, bulkiness and thermal insulation property of fabrics are obviously improved and the extremely strong cleaning function is achieved; the superfine fibers can be made into super-high density fabrics, and the clearances among the fibers are remained between droplet diameter and steam microdrop diameter, thus having waterproof and air permeability effects; and when the fibers are processed into wettable towel fabrics, the moisture can be quickly absorbed from washed hair so as to quickly dry hair by utilizing the towel with high water absorbability. The obtained superfine denier spandex fibers can be applied to various fields.

Description

technical field [0001] The invention relates to a method for melting and direct-spinning superfine-denier spandex fibers by reacting in a single static reactor, and belongs to the technical field of spandex fiber production. Background technique [0002] Spandex scientific name <polyutethane>Fiber is a highly elastic synthetic fiber developed in recent years, also known as: Spenders <spandex>Fiber, PTMG accounts for 80% (mass molecule) of the final polymer, known as the "second skin" of people. It is highly elastic and can be stretched 6-7 times, but it can quickly return to its original state as the tension disappears. Its molecular structure is a chain-like, soft and extensible polyurethane. Hard segments link together to enhance its properties. At present, it is widely used at home and abroad: chemical spinning, wet spinning and dry spinning. The above three spinning methods will cause environmental pollution in production, complex process, large energy con...

Claims

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Application Information

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IPC IPC(8): D01F6/78C08G18/66C08G18/42D01D5/08D01D5/088D01D5/096D01D1/00D01D1/10D01D10/02
Inventor 杨福兴杨建平杨惠彪
Owner TAICANG JINXIANG SPANDEX FIBER
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