Polyurethane elastic yarn and method for production thereof

A technology of polyurethane and elastic yarn, which is applied in the manufacture of rayon, single-component synthetic polymer rayon, and fiber chemical characteristics. It can solve the problems of low elongation and poor heat resistance of elastic fibers, and achieve high resilience, Ease of putting on and taking off and excellent color fastness

Inactive Publication Date: 2013-08-21
INVISTA TECHNOLOG IES S A R L
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyether-polyester block copolymer elastic fibers have low elongation and poor heat resistance compared with polyurethane elastic fibers, so they are rarely used

Method used

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  • Polyurethane elastic yarn and method for production thereof
  • Polyurethane elastic yarn and method for production thereof
  • Polyurethane elastic yarn and method for production thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0061] When the main structural components of polymer diol and diisocyanate polyurethane are prepared into polyurethane elastic yarn according to the preparation method of the present invention, the above-mentioned polymer having sulfo groups must be added. The polymer having a sulfo group can be added at the polymerization stage of the polyurethane, but for the purpose of the present invention, it is preferably added after the polyurethane solution is prepared first.

[0062] The polyurethane solution or the polyurethane as a solute in the solution may be prepared by melt polymerization or solution polymerization methods or other methods. However, solution polymerization is preferred. In the case of solution polymerization, no gel or other foreign matter is produced in polyurethane, which makes spinning easier and facilitates the production of low-fiber polyurethane filaments. Using solution polymerization also has the advantage of eliminating the solution preparation step. ...

Embodiment 1

[0132] A 35% by weight DMAc solution of a polyurethane polymer (a1) composed of PTMG with a number average molecular weight of 2900, MDI and ethylene glycol was polymerized by a conventional method to prepare a polymer solution A1.

[0133] Then, the molar ratio of phenolsulfonic acid and 4,4'-dihydroxydiphenyl sulfone is 52:48 (molar concentration 52%) shown in the formaldehyde condensation polymer (b1) shown in the chemical formula (II) as the compound with sulfo group Copolymer, prepare its DMAc solution.

[0134]

[0135] To prepare the DMAc solution, use a horizontal mill DYNO-MIL KDL (manufactured by Willy A. Bachofen Co.), fill the mill with 85% zirconium beads and perform uniform microdispersion at a flow rate of 50 g / min to prepare a compound with a sulfo group DMAc solution B1 (35% by weight) of the copolymer of .

[0136] Then, as an antioxidant, a polyurethane solution (Dupont Methacrole TM 2462, c1) and polycondensates of p-cresol and divinylbenzene (Dupont ...

Embodiment 2

[0144] A formaldehyde polycondensate (b2) of phenolsulfonic acid represented by chemical formula (III) was used as a copolymer of a compound having a sulfo group. This was prepared as a microdispersion of DMAc.

[0145]

[0146] A microdispersion was prepared in a manner similar to that used in Example 1, a DMAc dispersion B2 (35% by weight) of a polymer of a compound having a sulfo group was prepared. 92% by weight, 5% by weight and 3% by weight of the polymer solution A1 of Example 1, the copolymer solution B2 of the copolymer containing the above-mentioned monomer having a sulfo group, and other additive solutions C1 were uniformly mixed to prepare spinning Silk solution D2.

[0147] Dry spinning was carried out using a spinning solution at a speed ratio of godet roll to reel of 1.40 and a spinning speed of 540 m / min to produce polyurethane elastic yarn (200 g bobbin) of 20 dtex , a monofilament, and a copolymer containing 5% by weight of a compound having a sulfo grou...

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Abstract

Disclosed is a polyurethane elastic yarn which is excellent in elongation, resilience, heat resistance, alkali resistance, chemical resistance, and capability of being dyed with a cationic dye and which is suitable for use in a stretch cloth, a wearing apparel or the like. The polyurethane elastic yarn comprises: an elastic yarn comprising a polyurethane mainly composed of a polymer diol and a diisocyanate; and a polymer of a compound having a sulfonate group contained in the elastic yarn.

Description

field of invention [0001] The invention relates to a polyurethane elastic yarn with tensile strength, high resilience, alkali resistance, resistance to various chemical reagents, high heat resistance and non-fading cationic dye dyeability and a preparation method thereof. Background technique [0002] Due to its excellent stretching properties, elastic fibers are widely used as industrial materials and elastic fabric materials, which are used for socks, underwear, sportswear, and the like. [0003] Such elastic fibers, especially polyurethane elastic yarns, are required to have high tensile strength, high resilience, high chemical resistance, high heat resistance and color fastness. Especially in the area of ​​chemical resistance, there is a strong demand for blended fabrics used in combination with polyester filaments, and processing to make this polyester lighter and stain-resistant requires resistance to chemicals such as alkalis, quaternary ammonium salts, non-toxic Res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/94C08L75/04C08L101/06D01F1/10
Inventor 田中利宏井上裕邦原昌嗣上林达昭
Owner INVISTA TECHNOLOG IES S A R L
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