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A kind of flame-retardant superfine polyester sea-island fiber and its preparation method

A sea-island fiber and superfine polyester technology, applied in the field of spinning, can solve the problems of increased difficulty in composite spinning and great influence on the spinnability of spinning solution, achieving easy peeling, excellent hand feeling, and reduced intermolecular force Effect

Active Publication Date: 2020-11-17
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] There are many types of additive flame retardants, but with the increase of the amount of flame retardants added, it will have a greater impact on the spinnability of the spinning solution, and the difficulty of composite spinning will increase.
And the research on polyester flame retardant is becoming more and more mature, but nylon flame retardant is still in the research stage. Most of the flame retardant components in composite fibers are flame retardants for polyester fibers, and their applicability to polyester nylon sea-island fibers is not very high.

Method used

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  • A kind of flame-retardant superfine polyester sea-island fiber and its preparation method
  • A kind of flame-retardant superfine polyester sea-island fiber and its preparation method

Examples

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preparation example Construction

[0027] A preparation method of flame-retardant superfine polyester sea-island fiber, comprising the steps of:

[0028] (1) PA6 chips (relative viscosity 2.45-2.55, melting point 226°C) and metal salt phosphorus flame retardant were vacuum-dried until the moisture content was less than 100ppm and 80ppm respectively. Among them, the drying temperature of PA6 chips is 90-100°C, and the drying time is 24 hours; the drying temperature of metal salt phosphorus flame retardants is 100°C, and the drying time is 5 hours.

[0029] Blend and granulate PA6 and metal salt phosphorus-based flame retardants through a twin-screw blender (the twin-screw blender is divided into six zones, and the temperature range is 220-265 ° C), and prepare flame-retardant PA6 slices as Island phase raw materials.

[0030] (2) Pre-crystallize, dry and granulate PET chips (intrinsic viscosity: 0.60-0.70dl / g, melting point: 247°C) through a drum dryer at a drying temperature of 120-140°C and a drying time of 2...

Embodiment 1

[0034] A preparation method of flame-retardant superfine polyester sea-island fiber, comprising the steps of:

[0035] (1) Vacuum-dry 92.5 parts and 7.5 parts of zinc diethyl hypophosphite of PA6 slices (relative viscosity 2.45-2.55, melting point 226° C.) until the moisture content is less than 100 ppm and 80 ppm, respectively. Among them, the drying temperature of PA6 chips is 95°C and the drying time is 24 hours; the drying temperature of the flame retardant is 100°C and the drying time is 5 hours.

[0036] Blend and granulate PA6 and flame retardant through a twin-screw blender (the twin-screw blender is divided into six zones, and the temperature range is 220-265°C), and prepare flame-retardant PA6 slices as island phase raw materials.

[0037] (2) Pre-crystallize, dry and granulate PET chips (intrinsic viscosity: 0.60-0.70dl / g, melting point: 247°C) through a drum dryer. The drying temperature is 130°C, and the drying time is 24 hours. After drying, the resin contains wa...

Embodiment 2

[0043] A preparation method of flame-retardant superfine polyester sea-island fiber, comprising the steps of:

[0044] (1) Vacuum dry 92.5 parts of PA6 chips (relative viscosity 2.45-2.55, melting point 226°C) and 7.5 parts of zinc diethyl hypophosphite until the water content is less than 100ppm and 80ppm respectively. Among them, the drying temperature of PA6 chips is 95°C and the drying time is 24 hours; the drying temperature of the flame retardant is 100°C and the drying time is 5 hours.

[0045] Blend and granulate PA6 and flame retardant through a twin-screw blender (the twin-screw blender is divided into six zones, and the temperature range is 220-265°C), and prepare flame-retardant PA6 slices as island phase raw materials.

[0046] (2) Pre-crystallize, dry and granulate PET chips (intrinsic viscosity: 0.60-0.70dl / g, melting point: 247°C) through a drum dryer. The drying temperature is 130°C, and the drying time is 24 hours. After drying, the resin contains water Less t...

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Abstract

The invention relates to the field of spinning, and discloses a flame-retardant superfine polyester and nylon island fiber and a manufacturing method thereof. The island component of the island fiberis PA6, and the sea component is PET, wherein the island component contains metal salt phosphorus flame retardant. The manufacturing method includes manufacturing flame-retardant PA6 chips by blendingthe flame retardant and the PA6 through double thread rods; melting flame retardant PA6 and the PET by threaded rods respectively; merging the melted flame retardant PA6 and the PET in a spinning boxby a metering pump; extruding the flame retardant PA6 and the PET into bundles by spinnerets; cooling; oiling; drafting and shaping; and finally winding the bundles into silk cakes. The metal elements contained in the modified flame retardant can increase the incompatibility between polyester and nylon components, so that the fiber is conductive to performing alkali deweighting treatment to obtain the superfine flame retardant polyester and nylon fiber.

Description

technical field [0001] The invention relates to the field of spinning, in particular to a flame-retardant superfine polyester sea-island fiber and a preparation method thereof. Background technique [0002] Sea-island composite fibers can obtain superfine fibers through physical and chemical methods. With their high linear density and large specific surface area, superfine fibers have excellent hand feeling, moisture absorption and moisture conduction, and cleaning and decontamination performance, which can be used as simulation Silk fabrics, high-density fabrics, imitation buckskin, imitation jeanette fabrics, high-performance cleaning fabrics and other fabrics. [0003] Polyester-nylon composite superfine fiber utilizes the characteristics of poor compatibility between polyester and nylon, and polyester can be partially dissolved in alkaline solvents, and obtains polyester-nylon superfine sea-island fiber by alkali weight reduction. For example, Patent Application No. 201...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/14D01F8/12D01F1/07
CPCD01F1/07D01F8/12D01F8/14
Inventor 刘婷
Owner ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD
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