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Preparation method of nylon 66/tackified polyester composite sheath core fiber

A sheath-core fiber and nylon technology is applied in the field of preparation of nylon 66/tackified polyester composite sheath-core fibers, which can solve the problem of high cost of production materials, and achieve the effects of improving service life, high resilience and reducing production costs.

Active Publication Date: 2011-09-07
JIANGSU ZHONGSHI FIBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with nylon 66, the price of tackified polyester is relatively low. Generally, the price of nylon 66 slices is 2.5 times that of tackified polyester slices. Therefore, nylon 66 is used as the production material cost of industrial cloth. higher

Method used

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  • Preparation method of nylon 66/tackified polyester composite sheath core fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Nylon 66 with relative viscosity 2.7 and intrinsic viscosity 1.0 tackified polyester, with 70% (weight) nylon 66 and 30% (weight) tackified polyester, sheath-core composite, melt spinning, spinning temperature is 300 ℃ , the spinning pressure is 30.0MPa, the cooling air temperature and rheumatism wind speed is 18℃, 85%, 1.2m / s, the spinning speed is 500m / min, the oil bath drafting ratio is 3.8, 90~120℃ steam drafting, steam drafting The draw ratio was 1.1, resulting in a finished fiber of 33 dtex.

Embodiment 2

[0022] With relative viscosity 2.7 nylon 66 and intrinsic viscosity 0.7 tackifying polyester, with the nylon 66 of 70% (weight) and the tackifying polyester of 30% (weight), sheath-core composite, melt spinning, other process conditions are the same as embodiment 1, so as to get the finished fiber of 33dtex.

Embodiment 3

[0024] With relative viscosity 2.7 nylon 66 and intrinsic viscosity 1.0 tackifying polyester, with the nylon 66 of 50% (weight) and the tackifying polyester of 50% (weight), sheath-core composite, melt spinning, other process conditions are the same as embodiment 1, so as to get the finished fiber of 33dtex.

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Abstract

The invention discloses a nylon 66 / tackified polyester composite sheath core fiber and a preparation method thereof. The fiber comprises the following components by weight percent: 15-85% of nylon 66 and 85-15% of tackified polyester, wherein the nylon 66 serving as a sheath has a relative viscosity of 2.5-45.0% while the tackified polyester serving as a core has a relative viscosity of no less than 0.64%. The fracture strength of the fiber is no less than 3.6cN / dtex, the elongation at break thereof is no less than 80%, and the linear density thereof is 1.1-143dtex. The preparation method is as follows: compounding the nylon 66 into the sheath at the temperature of 300-310 DEG C and at the pressure of 5.0-35.0MPa, compounding the tackified polyester into the core at the temperature of 290-300 DEG C and at the pressure of 15-35.0MPa, and spinning, wherein the temperature, humidity and speed of cooling air are respectively15-28 DEG C, 75-100% and 0.8-2.5m / s, and the spinning speed is 400-1500m / s; drawing in an oil bath at the temperature of 50-90 DEG C, wherein the oil bath drawing times is 3.0-5.0; and drawing with steam at the temperature of 90-120 DEG C, wherein the steam drawingtimes is 1.1-1.5. The fiber can satisfy requirements on raw material fibers from customers like industrial woolen cloth, and greatly lowers the production cost.

Description

technical field [0001] The invention belongs to the field of composite fibers, in particular to a preparation method of nylon 66 / tackifying polyester composite sheath-core fiber. Background technique [0002] The existing composite sheath-core fiber is usually used as a low-melting point thermal bonding fiber, mainly with specifications such as 1.5-9.0dtex×3-64mm, and is processed into dust-free paper of corresponding specifications through hot air, hot rolling and other processes in use , Non-woven fabrics, widely used in the production of sanitary napkins, children's diapers, adult diapers and other products. The application of this product series and related manufacturing technology have certain limitations. With the expansion of the application field of composite fiber, the follow-up and upgrading of manufacturing technology, and the diversification of customer needs, new composite fiber products have entered the field of industrial yarn. The technical characteristics ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/12D01F8/14D01D5/34D01D5/08
Inventor 单正进
Owner JIANGSU ZHONGSHI FIBER CO LTD
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