Preparation method of phase change fibers

Abstract

The invention provides a preparation method of phase change fibers. The preparation method comprises the following steps: putting hollow fibers in a liquid storage tank, adding phase change materials to the liquid storage tank, and pressing by using a pressing plate; putting the liquid storage tank in a vacuum bin, sealing the vacuum bin, and vacuumizing the vacuum bin; heating the vacuum bin so as to ensure that the temperature in the vacuum bin is higher than the melting point of the phase change materials so as to melt the phase change materials; stopping vacuumizing, and opening a valve of the vacuum bin so as to ensure that the phase change materials enter inner parts of the hollow fibers under the effect of external atmospheric pressure and are fixed under the capillarity action of inner holes of the hollow fibers; and taking out the hollow fibers filled with the phase change materials, and removing the phase change materials adhered to the surfaces of the hollow fibers, thus obtaining the phase change fibers with a temperature control effect. The preparation method has the advantages that the phase change materials are directly poured into the inner parts of the hollow fibers and are fixed through the capillarity action of the hollow fibers, compared with a microcapsule method, the preparation method is simple in process and low in cost, the effective content of the phase change materials is high, and the temperature adjusting effect can be substantially improved.

Description

technical field [0001] The invention relates to a preparation method of a phase-change fiber, in particular to a phase-change fiber used for shoemaking and clothing cloth, and belongs to the field of phase-change heat storage materials. Background technique [0002] Phase change fiber is a new type of functional product that combines phase change material technology with fiber manufacturing technology, and has two-way temperature regulation. When the temperature of the external environment rises, the phase change material contained in the fiber undergoes a phase change, from solid to liquid, absorbing heat and storing it inside the fiber; when the temperature of the external environment decreases, the phase change material changes from liquid to solid, releasing heat. The stored heat keeps the body surface temperature and keeps the human body in a comfortable state. [0003] The temperature adjustment mechanism of phase change fiber textiles is different from that of tradit...

AI Technical Summary

Problems solved by technology

The hollow fiber impregnation method is to impregnate the hollow fiber in the phase change material solution, fill the hollow part with the phase change material, and then seal the ends of the fiber. The disadvantage is that the hollow fiber impregnation method has difficulty in sealing the end, and requires a larger inner diameter of the hollow fiber. The phase change material remains on the surface of the fiber, so it is easy to ooze and wash out; in the melt composite spinning method, the melt viscosity of the low temperature phase change material is low, and there is no spinnability. It is difficult to simply use the phase change material for melt composite spinning. After adding plasticizer, it can be used for spinning, but the conditions are harsh and the operation is complicated; the coating method is a simple and easy method to fix the phase change substance on the fabric, but it will affect the air permeability of the textile; the microcapsule composite spinning method is Add a certain amount of phase change material microcapsules to the spinning solution, and extrude through the spinneret to make fibers. This method is expensive and the effective content of the phase change material is low; the polymer graft modification method also has complex operations. , the disadvantage of low effective content of phase change materials

Images