Methods and compositions for cooling yarns and fabrics comprising a cellulosic fiber, and articles comprising same

Abstract

In one aspect, the disclosure relates to composite fibers having a structure comprising a core component and sheath component, wherein each of the core component and the sheath component independently comprise a polymer and a disclosed cooling composition. In various further aspects, the present disclosure pertains to single-covered yarn comprising a core yarn comprising a disclosed composite fiber comprising a core component and a sheath component, and a first fiber comprising a cellulosic fiber, such that the first fiber is wrapped or surrounds the core fiber. In still further aspects, the present disclosure pertains to a fabric, e.g., a woven or knit fabric, comprising a disclosed single-covered yarn. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.

1 - 20 . (canceled) 
     
     
         21 . A composite fiber comprising a core component and a sheath component, wherein:
 (a) the core component comprises a polyester polymer and a first cooling composition; and   (b) the sheath component comprises a polyamide polymer and a second cooling composition;   wherein the first cooling composition is present in an amount of about 1 wt % to about 20 wt % based on the weight of the polyester polymer and the first cooling composition;   wherein the first cooling composition comprises Ag, Al, Ca, Cu, Fe, K, Mg, Si, Ti, or combinations thereof present in at least one ionic or covalent compound;   wherein the second cooling composition is present in an amount of about 1 wt % to about 20 wt % based on the weight of the polyamide polymer and the second cooling composition; and   wherein the second cooling composition comprises Ag, Al, Ca, Cu, Fe, K, Mg, Si, Ti, or combinations thereof present in an at least one ionic or covalent compound.   
     
     
         22 . The composite fiber of  claim 21 , wherein the first cooling composition comprises one or more of:
 (a) Ag in an amount of about 0.1 wt % to about 10 wt % as determined in the composite fiber by elemental analysis;   (b) Al in an amount of about 0.1 wt % to about 1 wt % as determined in the composite fiber by elemental analysis;   (c) Ca in an amount of about 0.1 wt % to about 3 wt % as determined in the composite fiber by elemental analysis;   (d) Cu in an amount of about 0.1 wt % to about 10 wt % as determined in the composite fiber by elemental analysis;   (e) Fe in an amount of about 0.05 wt % to about 3 wt % as determined in the composite fiber by elemental analysis;   (f) K in an amount of about 0.1 wt % to about 3 wt % as determined in the composite fiber by elemental analysis;   (g) Mg in an amount of about 0.01 wt % to about 1.0 wt % as determined in the composite fiber by elemental analysis;   (h) Si in an amount of about 0.1 wt % to about 3 wt % as determined in the composite fiber by elemental analysis; and   (i) Ti in an amount of about 0.01 wt % to about 1.0 wt % as determined in the composite fiber by elemental analysis.   
     
     
         23 . The composite fiber of  claim 21 , wherein the second cooling composition comprises one or more of:
 (a) Ag in an amount of about 0.1 wt % to about 10 wt % as determined in the composite fiber by elemental analysis;   (b) Al in an amount of about 0.1 wt % to about 1 wt % as determined in the composite fiber by elemental analysis;   (c) Ca in an amount of about 0.1 wt % to about 3 wt % as determined in the composite fiber by elemental analysis;   (d) Cu in an amount of about 0.1 wt % to about 10 wt % as determined in the composite fiber by elemental analysis;   (e) Fe in an amount of about 0.05 wt % to about 3 wt % as determined in the composite fiber by elemental analysis;   (f) K in an amount of about 0.1 wt % to about 3 wt % as determined in the composite fiber by elemental analysis;   (g) Mg in an amount of about 0.01 wt % to about 1.0 wt % as determined in the composite fiber by elemental analysis;   (h) Si in an amount of about 0.1 wt % to about 3 wt % as determined in the composite fiber by elemental analysis; and   (i) Ti in an amount of about 0.01 wt % to about 1.0 wt % as determined in the composite fiber by elemental analysis.   
     
     
         24 . The composite fiber of  claim 21 , wherein the composite fiber comprises about 30 wt % to about 60 wt % of the polyester and the first cooling composition, and about 30 wt % to about 60 wt % of the polyamide and the second cooling composition. 
     
     
         25 . The composite fiber of  claim 21 , wherein the composite fiber comprises about 45 wt % to about 55 wt % of the polyester and the first cooling composition, and about 45 wt % to about 55 wt % of the polyamide and the second cooling composition. 
     
     
         26 . The composite fiber of  claim 21 , wherein the composite fiber has a weight of about 140D to about 400D. 
     
     
         27 . The composite fiber of  claim 21 , wherein the first cooling composition is a particle, a powder, or combinations thereof. 
     
     
         28 . The composite fiber of  claim 27 , wherein the first cooling composition is a particle. 
     
     
         29 . The composite fiber of  claim 28 , wherein the particle is a nanoparticle, a microparticle, or combinations thereof. 
     
     
         30 . The composite fiber of  claim 29 , wherein the nanoparticle has a size of about 10 nm to about 100 nm. 
     
     
         31 . The composite fiber of  claim 29 , wherein the microparticle has a size of about 10 μm to about 200 μm. 
     
     
         32 . The composite fiber of  claim 21 , wherein the second cooling composition is a particle, a powder, or combinations thereof. 
     
     
         33 . The composite fiber of  claim 32 , wherein the second cooling composition is a particle. 
     
     
         34 . The composite fiber of  claim 33 , wherein the particle is a nanoparticle, a microparticle, or combinations thereof. 
     
     
         35 . The composite fiber of  claim 34 , wherein the nanoparticle has a size of about 10 nm to about 100 nm. 
     
     
         36 . The composite fiber of  claim 34 , wherein the microparticle has a size of about 10 μm to about 200 μm. 
     
     
         37 . A single covered yarn comprising:
 (a) a core fiber comprising a composite fiber of claim  1 ; and   (b) a first fiber comprising a cellulosic fiber;   wherein the first fiber is wound around the core yarn to form a single covered yarn.   
     
     
         38 . The single covered yarn of  claim 37 , wherein the cellulosic fiber is a regenerated cellulosic fiber. 
     
     
         39 . The single covered yarn of  claim 38 , wherein the regenerated cellulosic fiber is a viscose rayon, a high wet modulus rayon, a cuprammonium rayon, a saponified rayon, a modal rayon, a lyocell rayon, or combinations thereof. 
     
     
         40 . The single covered yarn of  claim 39 , wherein the regenerated cellulosic fiber is a viscose rayon.