Compound elastic fibers and preparation method thereof

A composite elastic fiber and elastic technology, which is applied in fiber processing, stretch spinning, conjugated synthetic polymer artificial filament, etc., can solve the problems of poor elasticity, low elastic recovery rate, and low modulus of composite elastic fibers. Achieve high elastic recovery rate, high elongation at break and high economic value

Active Publication Date: 2018-03-09
SHANGHAI YITAN NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a kind of composite elastic fiber with high elasticity, high elastic recovery rate and low modulus, which is soft to the touch, in order to overcome the defects of poor elasticity, low elastic recovery rate and high modulus of the composite elastic fiber existing in the prior art. Composite elastic fiber and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A preparation method of a composite elastic fiber, the linear block copolymer composed of polyethylene naphthalate and PEG and the linear block copolymer composed of PTT, PET and PPG are passed through the melt, the spinneret Extrusion, cooling, heat drawing, heat setting and overfeed winding composite spinning to prepare side-by-side bicomponent composite fibers, in which the linear block copolymer composed of polyethylene naphthalate and PEG The crystallization temperature of polyethylene naphthalate is 160°C, the mass fraction of polyethylene naphthalate is 30%, and the number average molecular weight is 5.6×10 4 , the melting point is 230°C, the crystallization temperature of PTT and PET mixture in the linear block copolymer composed of PTT, PET and PPG is 110°C, the mass fraction of PTT and PET mixture is 30% (mass ratio is 2:1), the number The average molecular weight is 3.8×10 4 , with a melting point of 220°C. During the spinning process, the melt viscosity ra...

Embodiment 2

[0048] A preparation method of a composite elastic fiber, the linear block copolymer composed of PTT and PPG and the linear block copolymer composed of polytetramethylene glycol and MDI-1,6-hexanediol are melted Body, spinneret extrusion, cooling, heat stretching, heat setting and overfeed winding composite spinning to prepare side-by-side bicomponent composite fibers, in which PTT crystallizes in the linear block copolymer composed of PTT and PPG The temperature is 120°C, the mass fraction of PTT is 35%, and the number average molecular weight is 3.2×10 4 , the melting point is 170°C, the crystallization temperature of MDI-1,6-hexanediol in the linear block copolymer composed of polytetramethylene glycol and MDI-1,6-hexanediol is 110°C, MDI- The mass fraction of 1,6-hexanediol is 30%, and the number average molecular weight is 3.8×10 4 , with a melting point of 160°C. During the spinning process, the melt viscosity ratio of the linear block copolymer composed of PTT and PPG...

Embodiment 3

[0056] A kind of preparation method of composite elastic fiber, the linear block copolymer that is made of PBT and polytetramethylene glycol and by polypropylene glycol, polytetramethylene glycol (wherein polypropylene glycol, polytetramethylene glycol The linear block copolymer composed of alcohol (mass ratio 3:4) and 1,6-hexamethylene diisocyanate-hydroquinone bishydroxyethyl ether is melted, extruded through spinneret holes, cooled, and thermally stretched , heat setting and overfeed winding composite spinning to prepare side-by-side bicomponent composite fibers, in which the crystallization temperature of PBT in the linear block copolymer composed of PBT and polytetramethylene glycol is 130 °C, and the quality of PBT The fraction is 40%, the number average molecular weight is 3.9×10 4 , with a melting point of 180°C, 1,6-hexa The crystallization temperature of methylene diisocyanate-hydroquinone bis-hydroxyethyl ether is 80°C, the mass fraction of 1,6-hexamethylene diisoc...

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Abstract

The invention relates to compound elastic fibers and a preparation method thereof. The preparation method comprises the step of spinning a thermoplastic elastomer with a high crystallization temperature in a hard section, with a thermoplastic elastomer with a low crystallization temperature in the hard section in a compound manner to obtain the compound elastic fibers, wherein melt viscosity ratioof the thermoplastic elastomers is (1-1.5): 1, and the weight ratio of the thermoplastic elastomers is 20: 80 to 80: 20. The elongation at break of the compound elastic fibers is 200-1000%, the elastic recovery rate is greater than or equal to 95%, the curl ratio of macroscopic self-curling is 30-500%, the curling radius is smaller than or equal to 2mm, the curling quantity of the fibers is 25-150 / 25mm, and when the stretching stress is smaller than or equal to 0.05cN / dtex, the elongation of the fibers is 10-500%, and the intrinsic entropy-elastic deformation is in a deformation range of 20-200%. The compound elastic fibers provided by the invention are simple in process and low in cost, and the prepared compound elastic fibers have the advantages of high curl rate, high elastic recoveryrate, great elongation at break, low modulus and the like, and has a wide application prospect.

Description

technical field [0001] The invention belongs to the field of composite fibers, and in particular relates to a composite elastic fiber and a preparation method thereof. Background technique [0002] Stretch fabrics are favored by consumers for their unique comfort and flexibility, and their application fields have gradually expanded from traditional hosiery, underwear and sportswear to casual wear, high-elastic fashion and car decoration. However, traditional elastic fiber fabrics still have certain defects in performance. , excess elasticity, complex manufacturing and unstable fabric size and many other problems, the two-component composite elastic fiber represented by T400 came into being. This type of fiber uses the difference in viscoelasticity between the two polymers to make the composite fiber A smooth helical coiled structure was produced. [0003] At present, relevant patent documents have carried out in-depth research on the preparation technology of bicomponent c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/14D01F8/16D01D5/088D01D5/14D01D5/30D01D10/02
CPCD01D5/088D01D5/14D01D5/30D01D10/02D01F8/14D01F8/16
Inventor 于金超张玉梅陈康刘森林南建举
Owner SHANGHAI YITAN NEW MATERIAL CO LTD
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