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Method for producing melt direct spinning superfine denier polyurethane fibers through guide yarn stretching of double godet rollers

A technology of spandex fiber and godet roller, applied in the directions of stretch spinning, fiber processing, fiber chemical characteristics, etc., to achieve the effects of low bending stiffness, improved bulkiness and warmth retention, and strong cleaning function

Inactive Publication Date: 2012-05-23
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 melt direct spinning superfine denier polyurethane fibers through guide yarn stretching of double godet rollers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1. Take 75 kg of polyester polyol, 20 kg of isocyanate, and 5 kg of butanediol;

[0018] 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;

[0019] 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

[0025] 1. Take 62 kg of polyester polyol, 30 kg of isocyanate, and 8 kg of butanediol;

[0026] 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;

[0027] 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

[0034] 1. Take 70 kg of polyester polyol, 25 kg of isocyanate, and 5 kg of butanediol;

[0035] 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 50-55 minutes for purification;

[0036] 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...

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Abstract

The invention provides a method for producing melt direct spinning superfine denier polyurethane fibers through guide yarn stretching of double godet rollers, which is characterized by comprising the following steps: raw materials, charging under negative pressure, addition of 0.8MPa nitrogen pressure, a double-screw extruder, filtration in a melt filter, jetted yarn cooling in an air duct, oiling by an oiling machine, guide yarn stretching by double godet rollers, curing in a drying room and detecting and casing. The method has the following advantages: the superfine denier polyurethane fibers have low bending stiffness and quite soft feel; the surface areas of the fibers are large, thus obviously improving the coverage, bulkiness and heat retention of the fabrics and having extremely strong cleaning function; the superfine fibers are made into superhigh density fabrics and the size of the gaps between the fibers range from the diameter of the water drops to the diameter of the vapordroplets, thus having waterproof and air-permeability effects; and the superfine fibers are processed into such fabrics which can be moistened by water as towels and the towels have high water absorbability and can rapidly absorb the moisture of the washed hairs to rapidly dry the hairs. The method can be applied in various fields.

Description

technical field [0001] The invention relates to a method for producing superfine-denier spandex fiber by melting and direct-spinning through double-channel godet roller guide wire stretching, 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, co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/092D01D1/06D01F6/78D01D5/16
Inventor 杨福兴杨建平杨惠彪
Owner TAICANG JINXIANG SPANDEX FIBER
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