Double-sided thermostatic fabric and preparation method thereof

Abstract

A double-sided thermostatic fabric and a preparation method thereof are provided. The preparation method includes: preparing a light-reflecting heat-insulated fiber (namely a second fiber), and performing laser etching on a surface of the light-reflecting heat-insulated fiber to obtain a helical fiber, the helical fiber having good light reflection and heat reflection, and serving as an outer layer of the fabric; preparing a modified hemp fiber, the modified hemp fiber having good unidirectional moisture conduction and heat conduction, and serving as an inner layer of the fabric; and compositing the inner layer and the outer layer by connecting a back warp to a face weft, thereby forming the double-sided fabric. By modifying a surface structure of the fiber and performing modification on the fiber, the prepared fabric can realize temperature reduction through heat radiation and unidirectional moisture conduction in hot weathers, and realize heat preservation through heat reflection in cold weathers.

What is claimed is: 
     
         1 . A double-sided thermostatic fabric, comprising a first fiber and a second fiber, wherein
 the first fiber is a hemp fiber;   the second fiber is a helical fiber with a threaded groove in a surface; and   the first fiber and the second fiber are composited to form the double-sided thermostatic fabric; one side of the double-sided thermostatic fabric is the first fiber, and the other side of the double-sided thermostatic fabric is the second fiber; and when the double-sided thermostatic fabric is worn, both the first fiber side and the second fiber side face inward or outward.   
     
     
         2 . The double-sided thermostatic fabric according to  claim 1 , wherein the second fiber has a fineness of 2.0 dtex-5.0 dtex; and
 the second fiber is the helical fiber prepared by laser engraving or etching on the surface and provided with the threaded groove.   
     
     
         3 . The double-sided thermostatic fabric according to  claim 1 , wherein the hemp fiber is a modified hemp fiber. 
     
     
         4 . The double-sided thermostatic fabric according to  claim 3 , wherein the second fiber comprises a polyester fiber and a sun-protective light-reflecting coating covering the polyester fiber; and a helical groove is formed in an outer side of the sun-protective light-reflecting coating. 
     
     
         5 . The double-sided thermostatic fabric according to  claim 4 , wherein the sun-protective light-reflecting coating comprises alkyd resin and a sun-protective nanoparticle, and a mass ratio of the alkyd resin to the sun-protective nanoparticle is 1:(0-0.3). 
     
     
         6 . The double-sided thermostatic fabric according to  claim 5 , wherein the alkyd resin is silicone-modified alkyd resin; and preferably, the silicone-modified alkyd resin is obtained by copolycondensation of polyalkyl silicone resin, polyaryl silicone resin or polyalkylaryl silicone resin with the alkyd resin. 
     
     
         7 . The double-sided thermostatic fabric according to  claim 6 , wherein an outer surface of the helical fiber is of a threaded form; the threaded form is a trapezoid, a rectangle or a triangle; and preferably, the threaded form has a thread angle of 0°-30°, a width of 0.1 μm-3.0 μm from a crest to a root, and a pitch of 0.1 μm-5.0 μm. 
     
     
         8 . The double-sided thermostatic fabric according to  claim 7 , wherein the sun-protective nanoparticle has a particle size of 0.5 μm-10 μm. 
     
     
         9 . A preparation method of the double-sided thermostatic fabric according to  claim 1 , comprising the following steps:
 preparation of the second fiber:
 a first method comprises: (1) melting an alkyd resin or dissolving the alkyd resin in a solvent, adding a sun-protective nanoparticle, and performing stirring for 20 min-60 min; (2) allowing a substance obtained in step (1) to form a viscous semisolid; (3) completely removing the solvent or performing cooling to form a solid thin film, thereby obtaining a sun-protective light-reflecting coating; and (4) allowing the sun-protective light-reflecting coating to cover a polyester fiber; and 
 a second method: (1) performing a same operation as step (1) of the first method; (2) allowing the substance obtained in step (1) to form the viscous semisolid; and (3) coating the viscous semisolid obtained in step (2) on the polyester fiber; and preparation of the double-sided thermostatic fabric: 
   knitting the first fiber and the second fiber into the double-layer fabric.   
     
     
         10 . The preparation method according to  claim 9 , wherein in the first method, the threaded groove is formed in the sun-protective light-reflecting coating obtained in step (3);
 preferably, in step (2) of the first method or the second method, the viscous semisolid is formed as follows: A: adding a thickening agent; B: removing a part of the solvent if the alkyd resin is dissolved; and C: performing, if the alkyd resin is molten, the cooling to form the viscous semisolid; and   preferably, a binder is added in step (1) of the first method or the second method; and the binder comprises at least one of styrene-butadiene rubber (SBR), chloroprene rubber and nitrile-butadiene rubber (NBR).   
     
     
         11 . The preparation method according to  claim 9 , wherein in the double-sided thermostatic fabric, the second fiber has a fineness of 2.0 dtex-5.0 dtex; and
 the second fiber is the helical fiber prepared by laser engraving or etching on the surface and provided with the threaded groove.   
     
     
         12 . The preparation method according to  claim 9 , wherein in the double-sided thermostatic fabric, the hemp fiber is a modified hemp fiber. 
     
     
         13 . The preparation method according to  claim 12 , wherein in the double-sided thermostatic fabric, the second fiber comprises a polyester fiber and a sun-protective light-reflecting coating covering the polyester fiber; and a helical groove is formed in an outer side of the sun-protective light-reflecting coating. 
     
     
         14 . The preparation method according to  claim 13 , wherein in the double-sided thermostatic fabric, the sun-protective light-reflecting coating comprises alkyd resin and a sun-protective nanoparticle, and a mass ratio of the alkyd resin to the sun-protective nanoparticle is 1:(0-0.3). 
     
     
         15 . The preparation method according to  claim 14 , wherein in the double-sided thermostatic fabric, the alkyd resin is silicone-modified alkyd resin; and preferably, the silicone-modified alkyd resin is obtained by copolycondensation of polyalkyl silicone resin, polyaryl silicone resin or polyalkylaryl silicone resin with the alkyd resin. 
     
     
         16 . The preparation method according to  claim 15 , wherein in the double-sided thermostatic fabric, an outer surface of the helical fiber is of a threaded form; the threaded form is a trapezoid, a rectangle or a triangle; and preferably, the threaded form has a thread angle of 0°-30°, a width of 0.1 μm-3.0 μm from a crest to a root, and a pitch of 0.1 μm-5.0 μm. 
     
     
         17 . The preparation method according to  claim 16 , wherein in the double-sided thermostatic fabric, the sun-protective nanoparticle has a particle size of 0.5 μm-10 μm.