LDPE/PA6 sea-island fiber and preparation method thereof

A sea-island fiber and fiber technology, which is applied in the field of LDPE/PA6 sea-island fibers for PU microfiber leather and their preparation, can solve the problems of high crystallinity and low reduction speed of sea-island fibers.

Active Publication Date: 2021-09-14
江苏华峰超纤材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problems of low decrement speed of LDPE / PA6 island-in-the-sea fibers produced in the prior art and high crystallinity of LDPE / PA6 island-in-the-sea fibers after orientation, the present invention provides a method for inhibiting the orientation crystallization of sea-phase LDPE in LDPE / PA6 island-in-the-sea fibers, Reduce the crystallinity of the sea phase in sea-island fibers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A kind of preparation method of LDPE / PA6 sea-island fiber, concrete steps are as follows:

[0044] (1) Preparation of raw materials: the marine phase material is LDPE and PE wax, the addition amount of PE wax is 0.2wt% of the LDPE mass, the island phase material is PA6; the mass ratio of LDPE and PA6 is 30:70;

[0045] (2) Spinning: LDPE / PA6 sea-island fibers are prepared by twin-screw sea-island composite spinning method, LDPE and PA6 converge at the spinneret, and multiple PA6 streams are wrapped by LDPE to form sea-island fiber tows; LDPE is in the spinneret The melt temperature at the junction of the plates is 250°C, the melt temperature of PA6 at the junction of the spinnerets is 270°C, and the spinning speed is 350m / min;

[0046] (3) Cooling: The air blowing method is the combined use of ring suction and ring blowing, the cooling air temperature is 15°C, and the sea-island fiber primary silk with a crystallinity of 9.9% is obtained after cooling;

[0047] (4) Clu...

Embodiment 2

[0075] A kind of preparation method of LDPE / PA6 sea-island fiber, concrete steps are as follows:

[0076] (1) Preparation of raw materials: the marine phase material is LDPE and PE wax, the addition amount of PE wax is 0.5wt% of the LDPE mass, the island phase material is PA6; the mass ratio of LDPE and PA6 is 40:60;

[0077] (2) Spinning: LDPE / PA6 sea-island fibers are prepared by twin-screw sea-island composite spinning method, LDPE and PA6 converge at the spinneret, and multiple PA6 streams are wrapped by LDPE to form sea-island fiber tows; LDPE is in the spinneret The melt temperature at the junction of the plates is 252°C, the melt temperature of PA6 at the junction of the spinnerets is 270°C, and the spinning speed is 700m / min;

[0078] (3) Cooling: the air blowing method is the combined use of ring suction and ring blowing, the cooling air temperature is 18°C, and the sea-island fiber primary silk with a crystallinity of 9.3% is obtained after cooling;

[0079] (4) Clu...

Embodiment 3

[0089] A kind of preparation method of LDPE / PA6 sea-island fiber, concrete steps are as follows:

[0090] (1) Preparation of raw materials: the marine phase material is LDPE and PE wax, the addition amount of PE wax is 0.8wt% of the LDPE quality, the island phase material is PA6; the mass ratio of LDPE and PA6 is 50:50;

[0091] (2) Spinning: LDPE / PA6 sea-island fibers are prepared by twin-screw sea-island composite spinning method, LDPE and PA6 converge at the spinneret, and multiple PA6 streams are wrapped by LDPE to form sea-island fiber tows; LDPE is in the spinneret The melt temperature at the junction of the plates is 250°C, the melt temperature of PA6 at the junction of the spinnerets is 269°C, and the spinning speed is 800m / min;

[0092] (3) Cooling: The air blowing method is the combined use of ring suction and ring blowing, the cooling air temperature is 20°C, and the sea-island fiber primary silk with a crystallinity of 8.9% is obtained after cooling;

[0093] (4) ...

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Abstract

The invention relates to LDPE / PA6 sea-island fiber and a preparation method thereof. The crystallinity of LDPE in the LDPE / PA6 sea-island fiber is less than or equal to 11%. The preparation method comprises the following steps of (1) preparing raw materials: adopting LDPE and PE wax as a sea phase material, and adopting PA6 as an island phase material, wherein the mass of the PE wax is 0.2-0.8 wt% of that of the LDPE; (2) performing spinning: preparing the LDPE / PA6 sea-island fiber by adopting a double-screw sea-island composite spinning method, wherein the spinning speed is 350-800 m / min; (3) performing cooling: performing cooling to obtain sea-island fiber nascent filaments, wherein a blowing mode is the combination of annular air suction and annular air blowing; (4) performing bundling and oiling; (5) performing drafting: drafting the bundled and oiled fiber in a water bath at the drafting temperature of 90-95 DEG C; (6) performing crimping; and (7) performing loosening and setting to obtain the LDPE / PA6 sea-island fiber. According to the preparation method of the LDPE / PA6 sea-island fiber, the PE wax is added into the sea phase, and the high-temperature drafting process is carried out, so that the crystallinity in the sea-island fiber can be effectively prevented from being improved; and when the prepared sea-island fiber is applied to preparation of microfiber base cloth, the amount is easy to reduce.

Description

technical field [0001] The invention belongs to the technical field of microfiber cloth, and relates to an LDPE / PA6 sea-island fiber and a preparation method thereof, in particular to an LDPE / PA6 sea-island fiber for PU superfiber leather and a preparation method thereof. Background technique [0002] The LDPE / PA6 island-in-the-sea fiber produced by the composite spinning method is often used as the raw material for the preparation of PU superfiber synthetic leather. The preparation of PU superfiber synthetic leather generally includes the sea-island fiber manufacturing process, non-woven fabric process, base fabric processing process and leather processing. process, wherein the base fabric processing process includes non-woven fabric impregnated with polyurethane, coagulation, washing, weight reduction, drying, etc. During the weight reduction process, the sea-island fiber forms ultrafine fibers due to the dissolution of the island phase LDPE. In this process, the weight red...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/06D01F8/12D01F1/10
CPCD01F8/06D01F8/12D01F1/10Y02P70/62
Inventor 胡锦文孙向浩杨艳彪张逸俊
Owner 江苏华峰超纤材料有限公司
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