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Figured sea-island ultrafine fiber, preparing method and process method of synthetic leather of figured sea-island ultrafine fiber

A technology of superfine fiber and synthetic leather, applied in fiber processing, fiber chemical characteristics, melt spinning, etc., can solve the problems of poor dyeability of superfine fiber, uneven thickness of island components, and large equipment investment.

Inactive Publication Date: 2014-05-28
JINJIANG MINGAO TEXTILE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of low content of island components, uneven thickness of island components, difficulty in fiber opening, poor dyeability of ultrafine fibers after fiber opening, and poor mechanical properties in existing non-island-fixed sea-island ultrafine short fibers for synthetic leather. A series of problems such as poor performance, and at the same time avoid the problems of large equipment investment, high production cost, and low product quality in the production of ultrafine fiber synthetic leather based on the alkali weight reduction process. The produced fixed-island superfine fiber and its preparation method also provide a process for preparing synthetic leather by using the fixed-island superfine fiber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A fixed island superfine fiber is composed of a sea component and an island component. The fineness of the fixed island superfine fiber is 3 to 8 deniers, and the sea component is low-density polyethylene, polyethylene, polystyrene, Polypropylene, polylactic acid or polyvinyl alcohol, the island component is polycaprolactam, polyamide or polyester, the mass ratio of the island component to the sea component is 70:30 to 75:25, the The density of the low-density polyethylene is between 0.915 and 0.940 g / cubic centimeter, and the melt index is 5.0±0.7g / min; the relative viscosity of the polycaprolactam is 2.80±0.04η.γ.

[0020] The processing step of preparing described fixed island superfine fiber comprises:

[0021] a. Vacuum drying the slices of the sea component and the island component to remove moisture and recrystallize to obtain a material with a suitable viscosity;

[0022] b. The dried sea component slices and island component slices pass through their respectiv...

Embodiment 2

[0031] Use PA6 (polyamide) as the island component, after drying to ensure that the water content of the slices is controlled at 100PPM, PE (polyethylene) as the sea component, put them into their respective storage tanks, and enter their respective screw extrusion through the feeding system The machine is heated, melted, filtered, and then transported to the spinning box through the melt pipeline. The spinning melt entering the spinning box is metered into the composite spinning assembly through its own metering pump, in which the sea-island component ratio is controlled as PA6:PE=60:40, and the number of islands is 37 islands, which are extruded through the spinneret to form The composite monofilament is cooled by side blowing, oiled, crimped and stored in a silk drum through a sunflower roller. The winding speed of the pre-spinning spinning is 800m / min, and the fineness of the raw silk in the pre-spinning bundle is 15dtex. The tows of a certain number of silk barrels are bu...

Embodiment 3

[0033] Use PET (polyester) as the island component, after drying to ensure that the water content of the slices is controlled at 30PPM, PE (polyethylene) as the sea component, put them into their respective storage tanks, and enter their respective screw extrusion through the feeding system The machine is heated, melted, filtered, and then transported to the spinning box through the melt pipeline.

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PUM

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Abstract

The invention relates to a figured sea-island ultrafine fiber, a preparing method and a process method of synthetic leather of the figured sea-island ultrafine fiber. The figured sea-island ultrafine fiber consists of a sea ingredient and an island ingredient, wherein the fiber degree of the figured sea-island ultrafine fiber is 3 to 8 deniers, in addition, the sea ingredient is low-density polyethylene, polyethylene, polystyrene, polypropylene, polylactic acid or vinol, the island ingredient is polycaprolactam, polyamide or polyester, the mass ratio of the island ingredient to the sea ingredient is 70 / 30 to 75 / 25, the density of the low-density polyethylene is between 0.915 g / cm<3> to 0.940g / cm<3>, and the melt index is 5.0+ / - 0.7g / min, and the relative viscosity of the polycaprolactam is 2.80 + / - 0.04 Eta* gamma. The figured sea-island ultrafine fiber can be widely used for being made into shoes, sofas, garment leather, case and bag leather and leather for furniture and indoor decoration.

Description

technical field [0001] The invention belongs to the field of leather making technology, and in particular relates to a Dingdao superfine fiber, polyurethane synthetic leather and its base cloth, and a preparation method. Background technique [0002] At present, sea-island microfibers used in the production of synthetic leather in China can be divided into indefinite island-type sea-island microfibers and fixed-island-type sea-island microfibers according to the different production technologies adopted. The islands in the indeterminate island-type sea-island microfibers are uncontrollable and discontinuous on the longitudinal axis. After solvent treatment, ultrafine fibers with thick and thin, irregular lengths and short lengths are formed; while the fixed-island-type sea-island ultrafine fibers The fiber is continuous on the longitudinal axis, and is a uniform ultrafine fiber with a fixed number of islands, a uniform fineness, and a consistent length. The number of island...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/36D01D5/08D01D5/12D04H1/4382D04H1/46D06C7/02D06N3/00D06M15/568D01F8/00
Inventor 杨小波
Owner JINJIANG MINGAO TEXTILE SCI & TECH
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