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CN-122013356-A - Warm-keeping spandex fabric and preparation method thereof

CN122013356ACN 122013356 ACN122013356 ACN 122013356ACN-122013356-A

Abstract

The invention relates to a thermal spandex fabric and a preparation method thereof. The fabric is prepared by the following steps of firstly preparing n-eicosane/polyurethane microcapsule phase-change material, then blending the n-eicosane/polyurethane microcapsule phase-change material with polyurethane particles to prepare polyurethane particles containing microcapsules, and finally spinning by a melt spinning machine to weave silk threads into the fabric, wherein the fabric is the thermal spandex fabric. The air permeability ranges of the spandex fabric prepared by the method are 968.7-981.5 mm/s, and the Kroll value ranges are 0.86-0.88, so that the spandex fabric prepared by the method has good heat insulation performance on the premise of not affecting air permeability.

Inventors

  • YU JIALIANG
  • Xue Tengwei
  • PENG QIAN
  • LIU ZHIYI
  • HE LIN
  • CHEN XI

Assignees

  • 武汉纺织大学

Dates

Publication Date
20260512
Application Date
20260209

Claims (8)

  1. 1. The preparation method of the thermal spandex fabric is characterized by comprising the following steps of: (1) The preparation of the n-eicosane/polyurethane microcapsule phase-change material comprises the steps of dissolving n-eicosane and toluene-2, 4-diisocyanate in cyclohexane in a constant temperature water bath to prepare an organic phase, dissolving an emulsifier Tween 80 in water to prepare a water phase, dropwise adding the organic phase into the water phase under the stirring condition to emulsify to form O/W emulsion, dropwise adding an aqueous solution containing ethylene glycol into the emulsion, stirring for reaction, washing, suction filtering and drying a product after full reaction to prepare the n-eicosane/polyurethane microcapsule phase-change material; (2) Blending and granulating, namely granulating the n-eicosane/polyurethane microcapsule phase-change material prepared in the step (1) and polyurethane particles through a screw extruder to obtain microcapsule-containing polyurethane particles; (3) And (3) melt spinning and fabric preparation, namely spinning the microcapsule-containing polyurethane particles prepared in the step (2) through a melt spinning machine, and weaving silk threads into fabric, wherein the fabric is warm-keeping spandex fabric.
  2. 2. The preparation method of the thermal spandex fabric according to claim 1, wherein the dosage ratio of the n-eicosane, the toluene-2, 4-diisocyanate and the cyclohexane in the step (1) is 1g to (1-2) mL to (40-60) mL.
  3. 3. The preparation method of the thermal spandex fabric is characterized in that the dripping time of the organic phase in the step (1) to the aqueous phase is 20-40 min, and the dosage ratio of the organic phase to the aqueous phase is 1mL to (4-6) mL.
  4. 4. The preparation method of the thermal spandex fabric according to claim 1, wherein the dosage ratio of the emulsifier Tween 80 to water in the step (1) is 1g to (40-60) mL.
  5. 5. The preparation method of the thermal spandex fabric is characterized in that the volume fraction of ethylene glycol in the aqueous solution containing ethylene glycol in the step (1) is 5-10%, and the dosage ratio of the emulsion to the aqueous solution containing ethylene glycol is 1mL to (0.1-0.3) mL.
  6. 6. The preparation method of the thermal spandex fabric is characterized in that the temperature of the constant-temperature water bath in the step (1) is 30-40 ℃, the temperature of the stirring reaction is 50-70 ℃ and the time is 1-3 h.
  7. 7. The preparation method of the thermal spandex fabric according to claim 1, wherein the dosage ratio of the n-eicosane/polyurethane microcapsule phase-change material prepared in the step (1) to polyurethane is 1g to (300-500 g).
  8. 8. A thermal spandex fabric, characterized in that the thermal spandex fabric is prepared by the method of any one of claims 1-7.

Description

Warm-keeping spandex fabric and preparation method thereof Technical Field The invention belongs to the technical field of fabric preparation, and particularly relates to a thermal spandex fabric and a preparation method thereof. Background Modern people have higher requirements on the comfort, the functionality and the aesthetic property of the clothing, the traditional thermal insulation material is generally relatively bulky in volume, inconvenient to exercise and lack of aesthetic feeling, and passive thermal insulation can not well meet the functional requirements of the clothing for people working in extremely low-temperature environments, so the development of novel thermal insulation materials has important significance. Spandex is polyurethane elastic fiber, which is one of key factors for improving the quality of the fabric, the application range of the spandex in the fabric is continuously expanded, and the content of the spandex in the fabric is continuously increased. Chemical fibers have many advantages over natural fibers, and chemical fibers can have many functions through modification, which are desirable for natural fibers. The spandex fiber with the warm-keeping function not only can improve the comfort of the fabric, but also has the warm-keeping function, reduces the heat loss of a human body, and enables the human body to feel warm and feel more and more comfortable in cold winter. Proved by literature investigation and research, the thermal insulation performance of the spandex fabric is concerned. For example, china patent application No. 201410576731.0 discloses a thermal spandex fiber and a preparation method thereof, wherein prepolymer is manufactured according to the formula proportion, a chain extender is used for chain extension, the chain extender is N, N-dimethylacetamide solution of water, fiber-forming high polymer is obtained after reaction, the fiber-forming high polymer is mixed with additive slurry and then stored for curing, a carbon dioxide supercritical system is established in the storage and curing process to prepare spinning stock solution, and the thermal spandex fiber can be obtained through dry spinning equipment and process. At present, diamine chain extension is mainly adopted in the dry spinning preparation technology of spandex, so that the manufacturing cost is high, and the problem to be solved is also urgent. In addition, under the existing process conditions, the concentration of the stock solution is difficult to increase, otherwise poor dissolution can be caused, the spinnability is seriously affected, and the solvent consumption is large, the energy consumption is large and the cost is high. Therefore, a new technology for producing the thermal spandex fabric needs to be developed, and meanwhile, the technical problems in the manufacturing process are overcome, so that the requirements of spandex fabric manufacturing technology and clothing field development are met. Disclosure of Invention Aiming at the defects in the prior art, the invention aims to provide a thermal spandex fabric and a preparation method thereof. The invention aims to provide a thermal spandex fabric which has the characteristics of thermal insulation, environmental protection and the like, and is prepared by the following steps of firstly preparing an n-eicosane/polyurethane microcapsule phase-change material, then blending the n-eicosane/polyurethane microcapsule phase-change material with polyurethane particles to prepare polyurethane particles containing microcapsules, and finally spinning by a melt spinning machine to weave silk threads into the thermal spandex fabric. The invention aims at realizing the following technical scheme: A preparation method of a thermal spandex fabric comprises the following steps: (1) The preparation method of the n-eicosane/polyurethane microcapsule phase-change material comprises the steps of dissolving n-eicosane and toluene-2, 4-diisocyanate (TDI) in cyclohexane in a constant temperature water bath to prepare an organic phase, dissolving an emulsifying agent Tween 80 in water to prepare a water phase, dropwise adding the organic phase into the water phase under the stirring condition to emulsify to form O/W emulsion, dropwise adding an aqueous solution containing glycol into the emulsion, stirring for reaction, washing, filtering and drying a product after full reaction, and thus the n-eicosane/polyurethane microcapsule phase-change material is prepared. Preferably, the temperature of the constant-temperature water bath is 30-40 ℃. Preferably, the dosage ratio of the n-eicosane, the toluene-2, 4-diisocyanate (TDI) and the cyclohexane is 1g to (1-2) mL to (40-60) mL. Preferably, the dosage ratio of the Tween 80 to the water is 1g to (40-60) mL. Preferably, the dripping time of the organic phase to the aqueous phase is 20-40 min. Preferably, the dosage ratio of the organic phase to the water phase is 1:4-6. Preferably, the volume fraction of t