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Nylon BCF (bulk continuous filament) low-crimp fibers and preparation method thereof

A technology for crimping fiber and nylon is applied in the field of nylon BCF low-crimp fiber and its preparation. Production process, uniform linear density, and the effect of localization

Inactive Publication Date: 2020-02-04
SHEN MA INDUSTRY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem that the present invention is aimed at is: the nylon BCF fiber that produces in the prior art is highly crimped, and generally the crimp height is more than 5.5%, and the nylon BCF fiber tow tension that the crimp is high changes greatly, and yarn breaking strength is low, The elongation is too large to meet the needs of the market and the specific requirements of customers

Method used

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  • Nylon BCF (bulk continuous filament) low-crimp fibers and preparation method thereof
  • Nylon BCF (bulk continuous filament) low-crimp fibers and preparation method thereof
  • Nylon BCF (bulk continuous filament) low-crimp fibers and preparation method thereof

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preparation example Construction

[0027] The invention provides a kind of preparation method of nylon BCF low crimp fiber, the method comprises the following steps:

[0028] (1) Spinning: The dried nylon chips are melted and extruded through a screw extruder, and the melt reaches the spinning box and is metered by a metering pump. The melt is mixed, heated and filtered in the spinning assembly, and passed through the spinneret spit out to form a tow;

[0029] (2) Cooling and cooling: In the cold air chamber, the tow obtained in step (1) is cooled and cooled by side blowing; in this process, the temperature of the cold air is controlled to be 18~20°C, the wind pressure is 420~450Pa, and the wind speed is (0.5-0.55 )m / s; in this process, the temperature and pressure of the cold air are precisely controlled by the automatic control program to avoid fluctuations in the temperature and pressure of the cold air, so as not to have a great impact on the yarn, and can better ensure that the yarn has a good effect Stab...

Embodiment 1

[0050] A preparation method of nylon BCF low crimp fiber, the method may further comprise the steps:

[0051] (1) Spinning:

[0052] The dried nylon chips are melted and extruded through a screw extruder, and the melt reaches the spinning box and is metered by a metering pump. The melt is mixed, heated and filtered in the spinning assembly, and is extruded through the spinneret to form a tow;

[0053] (2) cooling down:

[0054] In the cold air chamber, the tow obtained in step (1) is cooled by side blowing; in this process, the temperature of the controlled cold air is 20 ℃, the wind pressure is 450Pa, and the wind speed is 0.5m / s; Precisely control the temperature and pressure of the cold air to avoid fluctuations in the temperature and pressure of the cold air, so as not to have a greater impact on the yarn, which can better ensure that the yarn effect is good and stable, and ensure that the primary fiber has low orientation and low crystallization, which is beneficial to t...

Embodiment 2

[0071] A preparation method of nylon BCF low crimp fiber, the method may further comprise the steps:

[0072] (1) Spinning:

[0073] The dried nylon chips are melted and extruded through a screw extruder, and the melt reaches the spinning box and is metered by a metering pump. The melt is mixed, heated and filtered in the spinning assembly, and is extruded through the spinneret to form a tow;

[0074] (2) cooling down:

[0075] In the cold air chamber, the tow obtained in step (1) is cooled by side blowing; in this process, the temperature of the cold air is controlled to be 18°C, the wind pressure is 420Pa, and the wind speed is 0.55m / s;

[0076] The tow after cooling is drawn to figure 1 Subsequent processing was carried out in the apparatus shown, as follows:

[0077] (3) Oiling:

[0078] Step (2) the tow after cooling is oiled through the oil nozzle in the device to ensure that the adhesion of the oil is 1.0%;

[0079] (4) Drafting:

[0080] The tow after oiling is d...

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Abstract

The invention discloses a preparation method of nylon BCF (bulk continuous filament) low-crimp fibers, which comprises the steps of carrying out melt extrusion on chips, spinning, cooling, oiling, drafting, deforming, cooling, intermingling and winding, wherein the temperature of a first drafting roller in the drafting process is 50-68 DEG C, the temperature of a second drafting roller is 170-200DEG C, air pressure of an interlacer is controlled to (4-6) KG in the intermingling process, and deformation air pressure is controlled to (4.5-5.5) KG in the deformation process. The preparation method disclosed by the invention ensures the stability of pressure in the deformation process, the continuous and stable production process is ensured, qualified yarns with high strength, high elasticity, low crimp and low intermingling degree can be produced, the high-end requirements of the market can be met, and the domestication of like products is achieved.

Description

technical field [0001] The invention belongs to the technical field of spinning, and in particular relates to a nylon BCF low-crimp fiber and a preparation method thereof. Background technique [0002] Bulk Continuous Filament (BCF) is a textured filament that is processed by a hot air texture device through stretched tow. BCF is widely used in many fields such as weaving carpets, car cushions and decorative fabrics due to its three-dimensional curling, good hand feeling and high bulkiness. Therefore, the preparation of the expanded filament has been a technology that has been continuously and deeply researched in the field of spinning. [0003] At present, the existing methods for preparing expanded filaments generally include steps such as spinning-drawing-deformation-dotted network-winding, etc. Expanded filaments with wide applications have been prepared through this method. However, when the expanded silk fiber prepared by the prior art, the cold air temperature is un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/16D01D5/088D01D5/096D02J1/08D02G1/16
CPCD01D5/088D01D5/096D01D5/16D02G1/16D02J1/08
Inventor 杨东辉王安乐刘淼王劼杨东华任蕾王晓峰石华张阳阳李明春薛山王普
Owner SHEN MA INDUSTRY CO LTD
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