Method for enhancing stretching mechanical property of polyurethane fiber

A polyurethane fiber and performance technology, applied in the field of fiber materials, can solve the problems of reduced elongation at break, increase of breaking strength and Young's modulus, and the effect is not obvious, and achieve enhanced elongation at break and Young's modulus enhanced effect

Active Publication Date: 2015-11-18
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, whether it is the synthetic modification of polyurethane or the modification of polyurethane spinning solution, there are disadvantages such as relatively complicated process, less obvious effect, and easy to cause other performance changes, and can only increase the breaking strength and Young's modulus, while the breaking elongation Length reduction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] c Preparation of modification solution

[0042] According to the following mass percentage:

[0043] Deionized water 15~97.5%

[0044] Ammonium salt 1~70%

[0045] Polar solvent containing amide bond 0.5~10%

[0046] Acetone 0.9~4.5%

[0047] Low relative molecular weight anionic surfactant 0.1~0.5%

[0048]One of ammonium nitrate or ammonium chloride or ammonium sulfate or ammonium bisulfate or ammonium carbonate or ammonium bicarbonate or ammonium phosphate or ammonium hydrogen phosphate or ammonium dihydrogen phosphate or diammonium hydrogen phosphate, formamide or N,N- One of dimethylformamide or N,N-dimethylacetamide, acetone and sulfate surfactants or sulfonate surfactants or phosphate surfactants with a relative molecular weight of 200-1000 One is put into deionized water with a conductivity of ≤16MΩ·cm to obtain a mixed solution, and then the temperature of the mixed solution is raised to 25-98°C and mechanically stirred for 3-5 hours to obtain a modified s...

Embodiment 1

[0061] a pretreatment of polyurethane fiber

[0062] In the Soxhlet extractor, the polyether polyurethane fiber is cleaned by siphon circulation with anhydrous ether, and after cleaning for 2 hours, it is placed in a drying oven at a temperature of 80°C for 1 hour until the ether on the surface of the polyether polyurethane fiber is removed, and the pretreatment is obtained. The final polyether polyurethane fiber, wherein the number of siphon cycle cleaning of the polyether polyurethane fiber is 20 times.

[0063] b Low temperature corona irradiation modification of polyurethane fiber

[0064] Treat the polyether polyurethane fiber pretreated in step a for 3 minutes in a low-temperature corona irradiation device with an atmosphere of air, a temperature of 18°C, a voltage of 6KV, and a distance of 0.5cm to obtain low-temperature corona irradiation modified The polyether type polyurethane fiber, wherein, the contact angle of the polyether type polyurethane fiber modified by low...

Embodiment 2

[0072] a pretreatment of polyurethane fiber

[0073] In the Soxhlet extractor, the polyester polyurethane fiber is cleaned by siphon circulation with anhydrous ether, and after cleaning for 3 hours, it is placed in a drying oven at a temperature of 85°C for 2 hours until the ether on the surface of the polyester polyurethane fiber is removed, and the pretreated After polyester polyurethane fiber, wherein, the number of siphon cycle cleaning of polyester polyurethane fiber is 30 times.

[0074] b Low temperature corona irradiation modification of polyurethane fiber

[0075] Treat the polyester polyurethane fiber pretreated in step a for 5 minutes in a low-temperature corona irradiation device with an atmosphere of air, a temperature of 21°C, a voltage of 9KV, and a distance of 1 cm to obtain low-temperature corona irradiation modified The polyester polyurethane fiber, wherein the contact angle of the polyester polyurethane fiber modified by low-temperature corona irradiation i...

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Abstract

The invention relates to a method for enhancing stretching mechanical property of polyurethane fiber, which belongs to the technical field of fibrous material. The method is characterized in that the polyurethane fiber is obtained through polyurethane fiber pretreatment, polyurethane fiber low temperature corona irradiation modification, preparation of a modification solution, embedding of ammonium salt molecules in polyurethane fiber, cleaning of ammonium salt molecules-imbedded polyurethane fiber, micro drawing and heat fixing. The polyurethane fiber is modified after moulding, polyurethane fiber breaking tenacity is realized, young modulus and fracture elongation are simultaneously enhanced, the breaking tenacity of the prepared polyurethane fiber is increased by 60-150%, fracture elongation is increased by 70-120%, and the young modulus is increased by 30-80%. The preparation method has the simple equipment, low cost, no pollution on ecological environment, high controllability and large application prospect.

Description

technical field [0001] The invention relates to a method for enhancing tensile mechanical properties of polyurethane fibers, which belongs to the technical field of fiber materials. Background technique [0002] Polyurethane fiber is called "Spandex" internationally, and the product name in my country is spandex. It is a fiber made by spinning polyurethane block copolymer. The elongation at break is as high as 500%~800%, the elastic recovery rate is generally higher than 90%, and the breaking strength is high. Elongation is widely used in knitted apparel, household items and other fields. [0003] With the expansion of the application field of polyurethane fiber, people put forward higher requirements for the mechanical properties of polyurethane fiber. At present, the methods for enhancing the tensile mechanical properties of polyurethane fibers are all concentrated before the molding of polyurethane fibers, and there is no relevant report on the enhancement of the tensil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M10/00D06M11/65D06M13/402D06M13/262D06M11/13D06M11/58D06M13/292D06M11/76D06M13/256D06M11/71D06M101/30
Inventor 刘欣唐运容徐卫林曹根阳李文斌张科杨锴
Owner WUHAN TEXTILE UNIV
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