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A weight reduction method of sea-island fibers with water-soluble polyurethane elastomer as the sea under mild conditions

A polyurethane elastomer and island-in-the-sea fiber technology, which is applied in fiber treatment, fiber chemical characteristics, climate sustainability, etc., can solve problems such as unfavorable spinning process, environmental pollution, and unfavorable sustainable development of ultrafine fiber industry

Active Publication Date: 2018-06-29
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patents ZL03121512.2, ZL201010554602.3, and ZL200410013813.0 propose to use polylactic acid or polyvinyl alcohol as the sea component. When polylactic acid is used as the sea component, polylactic acid is hydrolyzed and degraded, which has little impact on the environment, but causes resource pollution. Waste; polyvinyl alcohol is easy to absorb water, and it will be sticky when exposed to moisture, which is not conducive to the spinning process, and the melting temperature of polyvinyl alcohol is very close to the decomposition temperature, so polyvinyl alcohol is not particularly suitable for melt spinning
[0005] Therefore, the current sea-island microfiber technology will cause toxic and harmful organic emissions during the reduction process, causing environmental pollution or (and) waste of resources, which is not conducive to the sustainable development of the microfiber industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Raw material preparation: the sea component is a carboxyl-containing polyurethane elastomer prepared by the reaction of polyether diol and aromatic diisocyanate, and its melting temperature is 210°C; the island component is nylon 6, and the sea component and island group The mass ratio of the parts is 50:50.

[0023] (2) Spinning: according to the conventional 37-island fusion composite spinning process, that is, after the sea component and the island component are dried, they are extruded, melted and metered by the screw extruder, and then spun by the spinning assembly, and after cooling and forming Oiling, coiling, then clustering, drafting, crimping, shaping and cutting to obtain short fibers.

[0024] (3) Weight reduction: the sea-island short fibers are put into an aqueous solution of sodium hydroxide with a pH of 12 to reduce the weight, and the fibers after weight reduction are washed with water to obtain superfine short fibers.

[0025] (4) Polyurethane rec...

Embodiment 2

[0028] (1) Raw material preparation: the sea component is a polyurethane elastomer containing carboxyl and sulfonic acid groups prepared by the reaction of polyether diol and aliphatic diisocyanate, and its melting temperature is 170°C; the island component is nylon 6, sea group The mass ratio of part to island component is 25:75.

[0029] (2) Spinning: according to the conventional 7-island melt composite spinning process, that is, after the sea component and the island component are dried, they are extruded, melted and metered by the screw extruder, and then spun by the spinning assembly, and after cooling and forming Oiling, winding, and then clustering, drafting, and shaping to obtain filaments.

[0030] (3) Weight reduction: put the island-in-the-sea filaments into an aqueous sodium hydroxide solution with a pH of 10-10.5 to reduce the weight, and wash the reduced filaments with water to obtain superfine filaments.

[0031] (4) Polyurethane recovery: the pH value of the ...

Embodiment 3

[0034] (1) Raw material preparation: the sea component is a carboxyl-containing polyurethane elastomer prepared by the reaction of polyether diol and aromatic diisocyanate, and its melting temperature is 195°C; the island component is nylon 6, and the sea component and the island group The mass ratio of the parts is 60:40.

[0035] (2) Spinning: according to the conventional 37-island fusion composite spinning process, that is, after the sea component and the island component are dried, they are extruded, melted and metered by the screw extruder, and then spun by the spinning assembly, and after cooling and forming Oiling, coiling, then clustering, drafting, crimping, shaping and cutting to obtain short fibers.

[0036] (3) Weight reduction: the sea-island short fibers are put into an aqueous potassium hydroxide solution with a pH of 10.5-11 to reduce the weight, and the fibers after weight reduction are washed with water to obtain superfine short fibers.

[0037] (4) Polyure...

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Abstract

A sea-island fiber with water soluble polyurethane elastomer as sea and reducing method for same in a warm condition are provided. Sea-island fibers are made from water soluble polyurethane elastomer and island component fusion composite spinning filaments at a certain condition; and water solubility of polyester containing potential hydrophilic groups are utilized to reduce and recover sea components in the warm condition. The sea-island fiber can be widely applied to industries of synthetic leather and textile; compared with the prior art, by the use of the sea-island fiber, and the reducing method, environment pollution and resource waste due to organic emission during sea-island fiber reduction process can be overcome.

Description

technical field [0001] The invention relates to the field of differentiated fibers, in particular to a sea-island fiber with water-soluble polyurethane elastomer as the sea. Background technique [0002] Microfibers usually refer to fibers with a denier of 0.3 denier (diameter 0.5 microns), which have the characteristics of warmth retention, comfort, waterproof and air permeability, filterability, degreasing and decontamination, and are widely used in knitting, synthetic leather, electronic device processing and other industries. Among them, in 2014, the output of domestic microfiber synthetic leather was nearly 100 million meters, occupying an important position in the national economy. [0003] There are many ways to process ultrafine fibers, and the sea-island method is an extremely important one at present. [0004] Patents ZL200480020657.9, ZL01123513.6, ZL201110047108.2, and ZL201019063013.2 use or preferably use polyethylene as the sea, mainly using benzene reduction...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/30D01F13/04
CPCY02P70/62
Inventor 颜俊范浩军陈意张家发鲍亮郭学方李成祥
Owner SICHUAN UNIV
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