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Method for producing direct melt filtration fused direct spun ultrafine denier polyurethane fibers

A technology of spandex fiber and production method, applied in the direction of stretch spinning, fiber treatment, fiber chemical characteristics, etc., to achieve the effect of high water absorption, strong cleaning function, elongation and uniformity improvement

Inactive Publication Date: 2012-05-30
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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  • Method for producing direct melt filtration fused direct spun ultrafine denier polyurethane fibers
  • Method for producing direct melt filtration fused direct spun ultrafine denier polyurethane fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1. Take 75 kg of polyester polyol, 20 kg of isocyanate, and 5 kg of butanediol;

[0017] 2. Negative pressure feeding, evacuate to negative 0.8MPa pressure, feed polyester polyol raw material into the first purification tank through the first feeding valve set on the first purification tank, temperature 103-105°C, heat for 41 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 minutes for purification;

[0018] 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 meter...

Embodiment 2

[0023] 1. Take 62 kg of polyester polyol, 30 kg of isocyanate, and 8 kg of butanediol;

[0024] 2. Feed under negative pressure, evacuate to negative 0.8MPa pressure, add polyester polyol raw material into the first purification tank through the first feed valve installed on the first purification tank, heat at 103°C for 50 minutes for purification The raw material butanediol is added into the second purification tank through the second feeding valve arranged on the second purification tank, and the temperature is 106-108 ° C, and it is purified by heating for 52 minutes; the isocyanate is passed through the third purification tank arranged on the third The feeding valve is added to the third purification tank, the temperature is 110-112°C, and the temperature is 52 minutes for purification;

[0025] 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 t...

Embodiment 3

[0030] 1. Take 65 kg of polyester polyol, 30 kg of isocyanate, and 5 kg of butanediol;

[0031] 2. Feed under negative pressure, evacuate to negative 0.8MPa pressure, add polyester polyol raw material into the first purification tank through the first feed valve installed on the first purification tank, heat at 103°C for 45 minutes for purification The raw material butanediol is added into the second purification tank through the second feeding valve arranged on the second purification tank, and the temperature is 106 ° C, and it is purified by heating for 54 minutes; the isocyanate is passed through the third feeding valve arranged on the third purification tank Add to the third purification tank, temperature 110-112 ℃, heating for 550 minutes for purification;

[0032] 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 metering...

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Abstract

The invention discloses a method for producing direct melt filtration fused direct spun ultrafine denier polyurethane fibers. The method is characterized by comprising the following steps of: proportioning raw material components, feeding materials under negative pressure, applying 0.8MPa nitrogen pressure, extruding by a twin-screw extruder, filtering by a melt filter, cooling spun filaments by an air channel, oiling by an oiling machine, curing by a drying room, and detecting and packing. The invention has the advantages that: the ultrafine denier polyurethane fibers have small bending stiffness, soft handfeel and large surface area; the coverage, bulkiness and heat retention of a fabric are remarkably improved, and the fabric has strong cleaning function; the ultrafine fibers are prepared into an ultra-dense fabric, a gap among the fibers is between the diameter of a water drop and the diameter of a water vapor microdrop, and the ultra-dense fabric has a waterproof and ventilated effect; and the ultrafine fibers are processed into a towel fabric which can be wetted by water, and the towel fabric has high water absorption, and water of washed hair can be rapidly absorbed by using the towel, so that the hair is rapidly dried. The method can be applied to various fields.

Description

technical field [0001] The invention relates to a production method of melt direct spinning ultrafine denier spandex fiber by direct melt filtration, 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 consumption, l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/78D01D1/02D01D1/10D01D1/06D01D4/02D01D5/092D01D5/096D01D5/12D01D10/02
Inventor 杨福兴杨建平杨惠彪
Owner TAICANG JINXIANG SPANDEX FIBER
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