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Process for processing self-crimping nylon fibers

A technology of nylon fiber and processing technology, which is applied in the field of processing technology of self-curling nylon fiber, and can solve the problems of lack of elasticity of PET components and poor elastic recovery rate of fibers, etc.

Inactive Publication Date: 2017-02-22
ZHEJIANG GUXIANDAO INC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These technologies are made by side-by-side compounding of PET and PBT, PTT or modified PET. Although it has good crimping performance, the elastic recovery rate of the fiber is still poor due to the lack of elasticity of the PET component.

Method used

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  • Process for processing self-crimping nylon fibers
  • Process for processing self-crimping nylon fibers
  • Process for processing self-crimping nylon fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The relative viscosity of COPA is 2.9, the melting point is 175°C, the water content in dry slices is less than 100ppm, and the temperature in each zone of the screw is 200-250°C; the relative viscosity of PA is 2.4, the water content in dry slices is less than 100ppm, and the temperature in each zone of the screw is 250-270°C.

[0032] The composite ratio of COPA and PA is 40:60, the spinneret hole is circular, the temperature of the spinning box is 270°C, a special cooling sleeve is installed under each bundle of filaments exiting the spinneret, and the side blowing wind speed is 0.4m / s. The speed of the first hot roller is 3600m / min, the temperature is 50°C, the speed of the second hot roller is 4000m / min, the temperature is 120°C, the oiling rate is 0.8%, and the self-curling nylon composite FDY of 75dtex / 24f is obtained.

Embodiment 2

[0034] The relative viscosity of COPA is 3.0, the melting point is 185°C, the water content in dry slices is less than 100ppm, and the temperature in each zone of the screw is 200-250°C; the relative viscosity of PA is 2.5, the water content in dry slices is less than 100ppm, and the temperature in each zone of the screw is 250-270°C.

[0035] The composite ratio of COPA and PA is 50:50, and the spinneret hole is as follows image 3 The shape shown is circular, the temperature of the spinning box is 273°C, a special cooling sleeve is installed under each bundle of filaments exiting the spinneret, the wind speed of side blowing is 0.5m / s, the speed of the first hot roller is 3800m / min, and the temperature is 60°C , the speed of the second hot roller is 4100m / min, the temperature is 130°C, the oiling rate is 0.9%, and the self-curling nylon composite FDY of 100dtex / 24f is obtained.

Embodiment 3

[0037] The relative viscosity of COPA is 3.0, the melting point is 195°C, the water content in dry slices is less than 100ppm, and the temperature in each zone of the screw is 200-250°C; the relative viscosity of PA is 2.5, the water content in dry slices is less than 100ppm, and the temperature in each zone of the screw is 250-270°C.

[0038] The composite ratio of COPA and PA is 50:50, the spinneret hole is 8-shaped, the temperature of the spinning box is 276°C, a special cooling sleeve is installed under each bundle of filaments exiting the spinneret, and the side blowing wind speed is 0.5m / s. The speed of the first hot roll is 4000m / min, the temperature is 60°C, the speed of the second hot roll is 4200m / min, the temperature is 130°C, the oiling rate is 0.9%, and the self-curling nylon composite FDY of 150dtex / 36f is obtained.

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Abstract

The invention relates to a process for processing self-crimping nylon fibers, and belongs to the technical field of filament generation. The process comprises the following steps: respectively melting and extruding raw materials, namely copolymerization-modified nylon and conventional nylon, by two screw extruders; respectively measuring, and feeding into a dual-component composite spinning tank body and a spinning component; spraying out different melts from the same spinneret orifice in a spinneret plate; cooling through a cooling sleeve; performing oiling, drafting, thermoforming and winding to complete the spinning process to obtain the self-crimping nylon FDY of 75-200dtex / 24-48f. The process is applied to self-crimping nylon processing, and has the advantages of one-step forming and the like.

Description

technical field [0001] The invention relates to a processing technology of self-crimping nylon fiber, which belongs to the technical field of filament generation. Background technique [0002] Side-by-side composite fibers refer to self-crimping elastic fibers obtained by two-component composite spinning of two polymers with different shrinkage properties, and are the main types of composite fibers. In recent years, the preparation technology of side-by-side composite fibers has developed rapidly, and its commonly used composite components mainly include PET / PTT, PET / PBT, PTT / PBT and PET1 / PET2 with different molecular weights; the fiber cross-section is in addition to semicircular side-by-side composites. , There are also other cross-sections, such as flat type, dumbbell type, etc. [0003] Application number CN201410117372.2 discloses "a kind of gray elastic fiber and its preparation method", which is made of high-viscosity and low-viscosity PET respectively, and gray elas...

Claims

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Application Information

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IPC IPC(8): D01D5/08D01D5/088D01D5/096D01D5/253D01D5/30
CPCD01D5/08D01D5/088D01D5/096D01D5/253D01D5/30
Inventor 沈国光王秀华李为民袁建友
Owner ZHEJIANG GUXIANDAO INC CO