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CN-122013360-A - Humidity response nylon and preparation method thereof

CN122013360ACN 122013360 ACN122013360 ACN 122013360ACN-122013360-A

Abstract

The invention relates to the textile field, in particular to environment-friendly humidity response nylon which can be produced stably and efficiently, has high strength and simple process and a preparation method thereof. The PVA slice is extruded by a screw to prepare crosslinked modified PVA, a melt of the PVA slice is blended with modified nylon to be used as a core layer, a skin layer is prepared from conventional nylon slices serving as main raw materials through a skin-core spinning method, and the humidity response nylon is prepared from the skin layer blend, wherein the skin layer blend comprises 98-99% of nylon, and the core blend comprises 40-75% of modified nylon and 25-50% of crosslinked modified PVA. The preparation method of the humidity response nylon provided by the invention has good moisture absorption and sweat release effects after the nylon prepared by the method is woven into the fabric, realizes an intelligent humidity regulation function, is suitable for the fields of sportswear, medical textiles and the like, and has good antistatic effects due to higher moisture absorption rate.

Inventors

  • ZHENG YULEI
  • PENG ZIXIANG
  • Gan Chunjie
  • Nie Shuiguan

Assignees

  • 福建省力恒锦纶实业有限公司

Dates

Publication Date
20260512
Application Date
20260116

Claims (8)

  1. 1. A preparation method of humidity response nylon is characterized in that PVA slices are extruded by a screw to prepare crosslinked modified PVA, melt and modified nylon are blended to be used as a core layer, a skin layer is prepared from conventional nylon slices serving as main raw materials through skin-core spinning, the skin layer blend comprises 98-99% of nylon, the core blend comprises 40-75% of modified nylon and 25-50% of crosslinked modified PVA, and the percentages are mass percentages of the blend respectively.
  2. 2. The method for preparing humidity-responsive chinlon according to claim 1, wherein the PVA is extruded and crosslinked by a screw to obtain a crosslinked modified PVA melt, the melt is melt-blended with the modified chinlon melt and then conveyed to the core layer, and the crosslinked modified PVA is prepared from the following raw materials, by mass, 20-45% of PVA, 2-3% of a crosslinking agent, 0-5% of a plasticizer and 0-1% of a dehydrating agent, wherein the percentages represent mass percentages of the core blend.
  3. 3. The method of claim 2, wherein the crosslinking agent is diacid.
  4. 4. The method for preparing humidity-responsive chinlon according to claim 1, wherein the modified chinlon has a melting point of 195-210 ℃ and a relative viscosity of 2.3-2.7.
  5. 5. The method for preparing humidity-responsive nylon according to claim 1, wherein the skin layer blend comprises 98-99% nylon and 1-2% carbon nanotubes, and the sum of the above percentages is 100%.
  6. 6. The method for preparing humidity-responsive nylon according to claim 1, wherein the core blend comprises 40-75% modified nylon, 25-55% crosslinked modified PVA, and 1-2% maleic anhydride grafted POE, and the total mass percentage is 100%.
  7. 7. The method of claim 1, wherein the mass ratio of the sheath blend to the core blend is 6-8:2-4.
  8. 8. The humidity responsive nylon prepared by the method of any one of claims 1 to 6.

Description

Humidity response nylon and preparation method thereof Technical Field The invention relates to the field of textiles, in particular to humidity response nylon and a preparation method thereof. Background Nowadays, with the improvement of domestic and foreign consumption levels, the requirements of the masses on the performance of clothes are continuously improved, and the functions of comfort, health and the like are required from the previous requirements of fashion, warmth and the like, wherein the moisture absorption and quick drying functions are urgent requirements of summer clothes such as current sportswear, T-shirts and the like. The humidity response fiber has a humidity memory function, can perform shape transformation in a wet state and a dry state, thereby endowing the clothing fabric with special functional characteristics, and in addition, the fiber and the fabric thereof have a good antistatic effect due to a higher moisture absorption rate. Patent CN112575404a discloses a preparation method of high-sensitivity humidity response fiber, which comprises the steps of uniformly dispersing conductive nano material in hydrophilic polymer to form conductive nano material/hydrophilic polymer solution, performing wet spinning to obtain gel fiber, contacting the gel fiber with deliquescent salt solution, performing solvent replacement, and drying to obtain the high-sensitivity humidity response fiber. The method uses wet spinning, the prepared fiber has low strength, the fiber is subjected to twice solvent treatment, the preparation process is complex, the cost is high, the mass production difficulty is high, and the use of the solvent is not beneficial to the environmental protection requirement. Similar patent CN113106747A discloses a preparation method of a humidity response double-layer composite nanofiber membrane, the method also needs to be dissolved by a solvent, which is not beneficial to environmental protection, and the process needs to be subjected to the processes of dissolution, electrostatic spinning, vapor deposition cutting and the like, so that the preparation process is complex, the cost is high, and the mass production difficulty is high. Patent CN112853549a discloses a humidity response graphene intelligent fiber, which is characterized in that a layer of graphene material is compounded outside a high moisture absorption core layer to enable the fiber to have moisture absorption and electric conduction functions, the fiber inner layer is prepared by melt spinning, the fiber outer layer is prepared by using an unknown implanter, the dispersed graphene is embedded into the fiber inner layer by adopting a double-sided hot air implantation method, the fiber prepared by the method has several disadvantages, 1. Because the graphene is blown onto the inner layer material by means of hot air, the graphene is uniformly distributed on the inner layer and cannot form a continuous phase, so that the non-uniformity rate of the fiber evenness is increased, the graphene is equivalent to impurities, and the fiber strength is seriously reduced; 2. In the melt spinning process of the fiber, the stability is very critical, the hot air can cause the fiber to fly, the yarn breakage is easy to cause, the spinning stability is affected, the high-speed spinning cannot be carried out, and the yield is limited; 3. The method mentions that the fiber preparation is subjected to melt spinning, hot air hot pressing, cleaning and drying treatment, and the working procedures are multiple and complex. Disclosure of Invention The invention aims to solve the technical problem of providing humidity response nylon with good production stability, high strength and simple and environment-friendly process and a preparation method thereof. The invention is realized in the following way: The invention firstly provides a preparation method of humidity response nylon, which comprises the steps of preparing crosslinked modified PVA from PVA slices through screw extrusion, blending melt and modified nylon as a core layer, selecting conventional nylon slices as main raw materials for a skin layer, and preparing the humidity response nylon through skin-core spinning, wherein the skin layer blend comprises 98-99% of nylon, the core blend comprises 40-75% of modified nylon and 25-50% of crosslinked modified PVA, and the percentages are expressed as mass percentages of the respective blend. Further, the PVA is subjected to screw extrusion crosslinking to obtain a crosslinked modified PVA melt, the melt and the modified nylon melt are subjected to melt blending and then are conveyed to the core layer, and the crosslinked modified PVA is prepared from the following raw materials, by mass, 20-45% of PVA, 2-3% of a crosslinking agent, 0-5% of a plasticizer and 0-1% of a dehydrating agent, wherein the percentages represent the mass percentages of the core blend. Specifically, a reactive screw extruder is used in the preparation of cros