Composite fiber and its preparation method

A composite fiber and short fiber technology, applied in the direction of fiber processing, one-component polyamide rayon, one-component polyester rayon, etc., can solve the problems of not being applicable for a long time, achieve cost reduction, and promote wide application Effect

Inactive Publication Date: 2007-04-18
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its defect is that it cannot be applied to the comprehensive needs of high temperature,

Method used

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  • Composite fiber and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Drying of raw materials: PPS slices are screened and then sent to a vacuum drum for airtight vacuuming and heating. The temperature was raised to 150° C. for 8 hours and kept for 10 hours. After cooling, the material is delivered to the A# spinning material storage barrel. PET slices, intrinsic viscosity 0.68, heating time in the vacuum drum for 6 hours to 130°C, keeping warm at this temperature for 6 hours, and transporting to B# spinning material storage barrel after cooling. A# spinning screw temperature: 85°C in cooling zone, 295°C in feeding zone, 315°C in melting zone, 325°C in metering compression zone, and 315°C in elbow flange zone.

[0025] B# spinning screw temperature: cooling zone 70°C, feeding zone 275°C, melting zone 290°C, metering compression zone 300°C, elbow flange zone 285°C, composite spinning box 310°C, ring blowing plate distance 25cm, Wind speed 0.42m / min, wind temperature 28°C, unit suction air volume 70mm / H 2 O, spinning speed 750m / min. The...

Embodiment 2

[0027] Raw material dried PPS slices are the same as in Example 1, PET intrinsic viscosity is 0.82dl / g, the temperature is raised in the vacuum drum for 8 hours to 150°C, kept for 6 hours, cooled and transported to B# spinning storage barrel. The temperature of A# spinning screw is 85°C in the cooling zone; 298°C in the feed zone; 320°C in the melting zone; 330°C in the metering compression zone; 320°C in the elbow flange zone. B# spinning screw temperature, cooling zone 75°C; feeding zone 280°C; melting zone 295°C; metering compression zone 305°C; elbow flange zone 290°C. The temperature of the composite spinning box is 315°C, the distance between the ring blowing plates is 28cm; the wind speed is 0.45m / min; the wind temperature is 26°C. Unit suction air volume 65mm / H 2 O, spinning speed 700m / min. Total post-stretching ratio: 4.5 times; primary stretching ratio: 3.55 times, stretching temperature (oil bath): 78°C; secondary stretching ratio: stretching temperature (heating ...

Embodiment 3

[0029] The raw materials are dried, and the PPS chips are the same as in Example 1, except that the PET chips are replaced with PA chips with a molecular weight of 15800, and the temperature is raised in a vacuum drum for 7 hours to 130°C, kept at this temperature for 6 hours, and then transported to B# after cooling Spinning storage barrels. A# spinning screw temperature, cooling zone 75°C; feed zone 295°C; melting zone 315°C; metering compression zone 320°C; elbow flange zone 315°C. B# spinning screw temperature, cooling zone 70°C; feeding zone 270°C; melting zone 285°C; metering compression zone 295°C; elbow flange zone 280°C. The temperature of the composite spinning box is 310°C, the distance between the ring blowing plates is 30cm; the wind speed is 0.35m / min; the wind temperature is 22°C. Unit suction air volume 65mm / H 2 O, spinning speed 680m / min. The total post-stretching ratio is 5.01 times; the primary stretching ratio is 3.6 times, and the stretching temperature...

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Abstract

The invention relates to a kind of composite fiber and its preparation method. Composite fiber is long fiber or short fiber spinning by taking PPS as cortex and taking PET, PA6 or PA66 as skin-core structure of sandwich layer. The preparation method contains (1) Vacuum drying. (2) Spinning wind. (3) After-stretch hot established. The composite fiber has low cost and good quality, which is fiber filter material using extensively in environmental protection.

Description

technical field [0001] The invention belongs to the technical field of chemical fibers, and in particular relates to a composite fiber and a preparation method thereof. Background technique [0002] The main synthetic fibers in the existing high-temperature-resistant filter materials for pollution control are: [0003] Fibers spun by single-component PPS (polyphenylene sulfide), such as the Chinese patent entitled "A Method for Melting Spinning and Stretching Heat Setting of Linear Polyphenylene Sulfide Fibers": 200410096068.D. Its defect is that, due to the high price, it is difficult to be widely used in the environmental protection industry. [0004] And adopt general PET (polyester) or PA (polyamide) or sulfonamide fiber to make non-woven needle felting. Its defect is that it cannot be applied to the comprehensive needs of high temperature, hydrolysis, complex and changeable pollution control of acid and alkali for a long time. Contents of the invention [0005] The...

Claims

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Application Information

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IPC IPC(8): D01D5/34D01D10/02D01F6/66D01F6/62D01F6/60
Inventor 王依民倪建华温连庚
Owner DONGHUA UNIV
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