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Preparation method of high resilience chlorine-resistant spandex fiber and its application in diapers

A technology of spandex fiber and high resilience, which is applied in the fields of fiber chemical characteristics, textiles and papermaking, and single-component synthetic polymer rayon. Effect of improving creep resistance performance

Active Publication Date: 2022-02-18
ZHUJI HUAHAI SPANDEX +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the important indicators of elastic spandex products. The elasticity of conventional spandex cannot meet the needs of high-end textile products, especially in the field of diapers. The chlorine resistance directly affects the elastic loss rate of spandex. Technology development is particularly important

Method used

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  • Preparation method of high resilience chlorine-resistant spandex fiber and its application in diapers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A kind of preparation of high resilience chlorine-resistant spandex fiber:

[0038] Heat and melt polyester polyol and isocyanate, degassing treatment at 85°C and vacuum degree -0.10MPa respectively, after mixing, put them into a twin-screw extruder under the protection of nitrogen, control the temperature at 123°C, and react for 40 minutes to obtain the pre- Polymer;

[0039] Then add chain extender and additives, control the temperature at 195°C, react for 1min, then pelletize, dry, and ripen at 95°C to obtain polyurethane slices;

[0040] The above-mentioned dried polyurethane chips are melted and mixed evenly with a chlorine-resistant crosslinking agent, melt-extruded, spun and formed, and then aged at 95°C for 52 hours to obtain a high-resilience chlorine-resistant spandex fiber.

[0041] Among them, the molar ratio of polyester polyol, isocyanate and chain extender is 4.7:1:0.29; the amount of additive added is 1.3wt% of the total amount of polyester polyol, isoc...

Embodiment 2

[0045] The difference between the preparation of a kind of high resilience chlorine-resistant spandex fiber and embodiment 1 is:

[0046] The molar ratio of polyester polyol, isocyanate and chain extender is 5.6:1:0.38; the amount of additive added is 1.6wt% of the total amount of polyester polyol, isocyanate and chain extender; the amount of chlorine-resistant crosslinking agent added It is 4.1wt% of polyurethane chips; ethylenediamine, ethanolamine and 4,11-diamino-2-(3-methoxypropyl)-1H-naphtho[2,3-F]isoindol in the chain extender The molar ratio of indole-1,3,5,10(2H)-tetraketone is 7.3:0.77:2.1; the additives are titanium dioxide, antioxidant Tinuvin 622, UV stabilizer Tinuvin 234 and magnesium stearate, and the mass ratio of the four is 1:1.2:1:0.25.

[0047] The preparation of chlorine-resistant cross-linking agent is the same as in Example 1.

Embodiment 3

[0049] The difference between the preparation of a kind of high resilience chlorine-resistant spandex fiber and embodiment 1 is:

[0050] 4,11-diamino-2-(3-methoxypropyl)-1H-naphtho[2, 3-F]isoindole-1,3,5,10(2H)-tetraone.

[0051] The preparation of chlorine-resistant cross-linking agent is the same as in Example 1.

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Abstract

The invention discloses a preparation method of high resilience chlorine-resistant spandex fiber and its application in diapers, and relates to the technical field of chemical fiber materials. The preparation method of the high-resilience chlorine-resistant spandex fiber includes: taking polyester polyol and isocyanate to react to obtain a prepolymer; taking the above-mentioned prepolymer to react with a chain extender and an additive, and obtaining a polyurethane chip after discharging and aging; Polyurethane chips are melted and mixed evenly with chlorine-resistant cross-linking agent, and high-resilience chlorine-resistant spandex fibers can be obtained after melt extrusion, spinning molding and aging. The high-resilience chlorine-resistant spandex fiber prepared by the invention has higher resilience and chlorine resistance, and has a low stress relaxation rate, which effectively improves the safety of use; at the same time, it has excellent mechanical properties and stronger creep resistance, which is different from non-woven fabrics. The woven fabric has better bonding performance and has a wide range of applications.

Description

technical field [0001] The invention belongs to the technical field of chemical fiber materials, and in particular relates to a preparation method of high resilience chlorine-resistant spandex fiber and its application in diapers. Background technique [0002] Spandex fiber, that is, polyurethane elastic fiber, is a polymer material containing more than 85% (wt) of polyurethane chain segments. Due to its excellent elasticity and resilience properties, spandex has a wide range of applications in important fields of national economy such as textile and clothing and biomedicine. There are already many patents on elastic fiber production technology, such as European patents EP0343985, EP1311578, U.S. patents US5340902, US5691441, Chinese patents CN1480570A, CN101469463A, etc. However, some of these reports lack application in production and have not been industrialized. The resilience of some invented spandex is not ideal, which affects the application of elastic fiber in some ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/94
CPCD01F6/94C08G18/4854C08G18/10C08G18/6688C08G18/3228C08G18/3271C08G18/3844C08G18/3842
Inventor 蔡函烨徐爱军蔡华峻刘帅杰
Owner ZHUJI HUAHAI SPANDEX
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