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A kind of high-elastic polyester-nylon side-by-side composite fiber and its preparation method

A technology of composite fiber and elastic polyester, which is applied in fiber treatment, fiber chemical characteristics, rayon manufacturing, etc., can solve the problems of easy fiber opening and poor elastic recovery rate, and achieve improved binding force, compatibility, and solution The effect of easy fiber opening

Active Publication Date: 2022-04-01
ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned technical problems, the present invention provides a high-elastic polyester-nylon side-by-side composite fiber and a preparation method thereof. The present invention blends and dopes an appropriate amount of polyamide in the polyester to improve the compatibility of polyester and polyamide; at the same time In the process of spinning, when the modified polyester component and the modified nylon component are in contact with each other, the two high-temperature modifiers are cross-linked, making the polyester The ester component and the polyamide component are connected in the form of covalent bonds, which improves the binding force of the two strands of fibers and solves the problems that the two strands of fibers are easy to split and the elastic recovery rate is poor in the polyester-nylon side-by-side composite fiber. The invention makes a breakthrough Overcoming the current situation that it is impossible to actually mass-produce polyester-nylon side-by-side composite elastic fibers by relying on existing technologies

Method used

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  • A kind of high-elastic polyester-nylon side-by-side composite fiber and its preparation method
  • A kind of high-elastic polyester-nylon side-by-side composite fiber and its preparation method
  • A kind of high-elastic polyester-nylon side-by-side composite fiber and its preparation method

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preparation example Construction

[0043] A preparation method of high-elastic polyester-nylon side-by-side composite fibers, comprising the following steps:

[0044] 1) The raw materials of the modified polyester component and the modified nylon component are mixed evenly.

[0045] 2) Under the protection of an inert gas, the two mixtures obtained in the step 1) are respectively heated and melt-filtered in a twin-screw extruder. The screw temperature of the modified polyester component is set at 250-290°C, the screw temperature of the modified nylon component is set at 210-240°C, and the screw speeds of the two are 50-150 rpm.

[0046] 3) Use a metering pump to distribute the two strands of melt in the composite spinning assembly (10:90 to 90:10), and then form a thin stream side by side at the spinneret, and extrude from the spinneret hole. Under the conditions of 30°C, 0.30~0.60m / s, and humidity of 75±5%, it is cooled and formed by side blowing, and enters the spinning tunnel after oiling. The spinning tem...

Embodiment 1

[0049] The polyester chips and the polyamide chips were placed in a vacuum drum oven to dry for 12 hours, and then the ratio of 70:30 and 5wt% sulfomethyl phenolic resin with a degree of polymerization of 10-15, 3wt% antioxidant 2, 6-dibutyltetracresol (BHT), 0.1wt% light stabilizer LA7700, 5wt% chain extender 2,2'-bis(2-oxazoline) are mixed evenly, and the mixed raw materials are extruded from the twin-screw Add it into the feed port of the machine. The temperature setting parameters of the twin-screw extruder are 250°C / 255°C / 258°C / 258°C / 255°C / 255°C / 255°C / 255°C / 255°C / 260°C, and the screw speed is set at 130rad / min.

[0050] Put the polyamide slices in a vacuum drum oven to dry for 12 hours, then mix the dried polyamide slices and sulfonated tannins in a blender at a mass ratio of 96:4, and mix the polyamide raw materials Put it into the feed port, the screw temperature is set at 215°C / 220°C / 225°C / 225°C / 225°C / 223°C / 223°C / 223°C / 223°C / 228°C, and the screw speed is 100rad / min. ...

Embodiment 2

[0054] The polyester chip and the polyamide chip were placed in a vacuum drum oven and dried for 12 hours, and then the ratio of 80:20 and 3wt% sulfomethyl phenolic resin with a degree of polymerization of 15-20, 3wt% antioxidant 2, 6-dibutyltetracresol (BHT), 0.1wt% light stabilizer LA7700, and 4wt% chain extender epoxy resin were mixed evenly, and the mixed raw materials were added from the feed port of the twin-screw extruder. The processing parameters of twin-screw extruder are set with embodiment 1.

[0055] The polyamide slices were dried in a vacuum drum oven for 12 hours, then the dried polyamide slices and sulfomethyl extract were mixed uniformly in a blender at a mass ratio of 97:3, and the mixed polyamide The raw materials are put into the feed inlet, and the process parameters of the twin-screw extruder are set with the same embodiment 1.

[0056] Preparation of polyester and nylon side-by-side composite fibers: the two melts prepared above enter the composite spi...

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Abstract

The invention relates to the field of chemical fibers, and discloses a high-elastic polyester-nylon side-by-side composite fiber and a preparation method thereof. The fiber includes a side-by-side compound modified polyester component and a modified nylon component; the raw materials of the modified polyester component before melting include 60-90wt% of polyester chips, 10-40wt% of polyamide chips and 1-6wt% of high-temperature modifier A or high-temperature modifier B; the raw materials of modified nylon components before melting include polyamide chips and 1 ‑6wt% of high-temperature modifier B or high-temperature modifier A; the type of high-temperature modifier in the modified polyester component and the modified nylon component is different; the modified polyester component and the modified nylon component are spun Afterwards, the high temperature modifier A and the high temperature modifier B are cross-linked. The invention solves the problem that the two fibers in the polyester-nylon side-by-side composite fiber are easy to split and the elastic recovery rate is poor, and the invention breaks through the current situation that the polyester-nylon side-by-side composite elastic fiber cannot be actually mass-produced by relying on the prior art.

Description

technical field [0001] The invention relates to the field of chemical fibers, in particular to a high-elastic polyester-nylon side-by-side composite fiber and a preparation method thereof. Background technique [0002] Polyester and nylon are the two most productive fibers among synthetic fibers. Because of their unique properties, they are widely used in civil and industrial fields. With the improvement of people's demand for quality of life, single-component fibers with single functions have gradually lost their market momentum, and are replaced by composite and functional fibers. Among them, composite fibers can be divided into two types: bi-component composite fibers and multi-component composite fibers, which not only have the characteristics of different component polymers, but also have unique properties of composite fibers. [0003] Wool fiber has the characteristic of natural crimp. The orthocortex and partial cortex cells of its cross section are arranged in paral...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/14D01F8/12D01F1/10D01D5/32
CPCD01F8/14D01F8/12D01F1/10D01D5/32
Inventor 樊亚玲王文林巧巧李皓岩
Owner ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD