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Composite fiber and its mfg. method

A composite fiber and manufacturing method technology, which is applied in the field of speech, can solve the problems of polyester stretchable composite fiber tensile strength and stretchability reduction, and achieve excellent chlorine resistance and shape stability, excellent stretchability, and reduced retention the effect of time

Active Publication Date: 2007-08-29
HYOSUNG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the stretchable composite fibers of polyethylene terephthalate and polytrimethylene terephthalate, the inventors found that because of the difference in chemical structure, only adjusting the spinning process conditions can improve the degree of crystallinity. It is difficult to reach a certain level or more. Therefore, when the amorphous region expands in contact with various types of water, tap water, and groundwater, the tensile strength and stretchability of the polyester stretchable composite fiber will be reduced due to the chlorine component.

Method used

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  • Composite fiber and its mfg. method
  • Composite fiber and its mfg. method
  • Composite fiber and its mfg. method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] In the process of manufacturing stretchable composite fibers, the spinning temperature is set at 275°C, the spinning speed is 2800 m / min, the crimping tension is 0.09g / d, and the residence time in the module is 3 minutes, using the existing melt composite spinning Equipment, with the ratio of weight ratio 5:5, the number average molecular weight (Mn) is 14632, the molecular weight distribution index (PDI) is the polyethylene terephthalate of 2.2 and the number average molecular weight (Mn) is 32149, molecular weight distribution Polytrimethylene terephthalate with a coefficient (PDI) of 2.4 is used to produce polyester composite fibers in the side-by-side cross section of Fig. 1-(a). The conjugated fiber obtained through the above-mentioned spinning / coiling was drawn by another drawing device to produce a stretchable conjugated fiber having a single filament fineness of 2.1 denier. When stretching was performed, the stretching ratio was 1.60, the stretching temperature ...

Embodiment 2

[0088] In the process of manufacturing stretchable composite fibers, the spinning temperature is set at 280°C, the spinning speed is 2600 m / min, the crimping tension is 0.07g / d, and the residence time in the module is 4 minutes. Equipment, in the ratio of 5:5 by weight, polyethylene terephthalate with a number average molecular weight (Mn) of 14632 and a molecular weight distribution index (PDI) of 2.2 and a number average molecular weight (Mn) of 39334, molecular distribution Polytrimethylene terephthalate with a coefficient (PDI of) 2.2 is used to produce polyester composite fibers in the side-by-side cross section of Fig. 1-(a). The conjugated fiber obtained through the above-mentioned spinning / coiling was drawn by another drawing device to produce a stretchable conjugated fiber having a single filament fineness of 2.1 denier. When stretching was carried out, the stretching ratio was 1.70, the stretching temperature was 90°C, and the heat setting temperature was 160°C. Tabl...

Embodiment 3

[0090] In the process of manufacturing stretchable composite fibers, the spinning temperature is set at 283°C, the spinning speed is 2400 m / min, the crimping tension is 0.08g / d, and the residence time in the module is 4 minutes. Equipment, with the ratio of weight ratio 5:5, the number average molecular weight (Mn) is 16422, the molecular weight distribution index (PDI) is the polyethylene terephthalate of 2.1 and the number average molecular weight (Mn) is 45752, molecular weight distribution Polytrimethylene terephthalate with a coefficient (PDI) of 2.0 is used to produce polyester composite fibers in the parallel cross section of Fig. 1-(a). The conjugated fiber obtained through the above-mentioned spinning / coiling was drawn by another drawing device to produce a stretchable conjugated fiber having a single filament fineness of 2.1 denier. When stretching was carried out, the stretching ratio was 1.70, the stretching temperature was 90°C, and the heat setting temperature wa...

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Abstract

The invention provides a conjugate fiber excellent in flexibility and improved in chlorine resistance and the producing method thereof. By adjusting the molecular weight, molecular weight distribution and fine structure of the conjugate fiber, it is possible to exhibit a high flexibility such as >=30% natural crimp stretch and >=70% natural elastic recovery rate without separately performing a dyeing or post processing such as with boiling water or dry heating at or higher than a prescribed temperature, and also to produce the conjugate fiber having >=85% strength-maintaining rate and >=80% flexibility-maintaining rate after a chlorine treatment, and also extremely excellent in elasticity, chlorine resistance and stability by applying a post processing or washing utilizing industrial water, tap water, underground water, etc.

Description

technical field [0001] The present invention relates to a polyester-based composite fiber with excellent stretchability and improved chlorine resistance, and a method for producing the same. More specifically, it relates to a side-by-side composite fiber with excellent natural stretchability and chlorine resistance. , Molecular weight distribution and fine structure, even without additional boiling water or dry heat processing, its natural stretchability and chlorine resistance are also excellent, and it is extremely stable to industrial water, tap water, ground water, etc. used in post-processing and washing. [0002] The stretchable composite fiber produced by the present invention can exhibit a natural crimp elongation of not less than 30% and a stretch rate of not less than 70% even without additional dyeing or post-processing such as boiling water above a certain temperature or dry heat treatment. Natural elastic recovery rate, and the tensile strength maintenance rate af...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/14D01D5/30
CPCD01D5/32D01D10/02
Inventor 吴圣镇李炯在孙亮国权益铉
Owner HYOSUNG CORP
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