Fiber and wadding

Abstract

Provided is a fiber having superior bulkiness despite being a synthetic fiber, and wadding. The fiber contains inorganic particles having an average particle diameter of 1 μm to 20 μm within the fiber and fiber pores having a maximum width of 0.1 μm to 5 μm and maximum length of 1 μm to 50 μm are formed in fiber cross-sections in the axial direction of the fiber. The wadding contains a fiber A, and the content of fiber A in the wadding (100% by weight) is 50% by weight to 100% by weight, down power is 270 cm 3 /g to 400 cm 3 /g, and the fiber A contains inorganic particles having an average particle diameter of 1 μm to 20 μm within the fiber.

1 . A fiber containing inorganic particles having an average particle diameter of 1 μm to 20 μm within the fiber, wherein fiber pores having a maximum width of 0.1 μm to 5 μm and maximum length of 1 μm to 50 μm are formed in fiber cross-sections in the axial direction of the fiber. 
     
     
         2 . The fiber according to  claim 1 , wherein the content of the inorganic particles in the fiber (100% by weight) is 1% by weight to 15% by weight. 
     
     
         3 . The fiber according to  claim 1 , wherein the inter-fiber coefficient of static friction p s  is 0.33 to 0.45. 
     
     
         4 . The fiber according to  claim 1 , wherein the fiber is an acrylic fiber. 
     
     
         5 . The fiber according to  claim 1 , wherein a plurality of pores are formed in the inorganic particles, the pore volume of the inorganic particles is 0.3 mL/g to 2.0 mL/g, and the specific surface area of the inorganic particles is 200 m 2 /g to 800 m 2 /g. 
     
     
         6 . The fiber according to  claim 1 , wherein single fiber fineness is 0.5 dtex to 20 dtex, single fiber strength is 1.8 cN/dtex to 3.0 cN/dtex, and single fiber elongation is 10% to 50%. 
     
     
         7 . The fiber according to  claim 1 , wherein down power is 270 cm 3 /g to 400 cm 3 /g and Clo value is 3 to 5. 
     
     
         8 . The fiber according to  claim 1 , wherein maximum attainable fiber temperature when changed from an environment at a temperature of 20° C. and humidity of 40% RH to an environment at a temperature of 20° C. and humidity of 90% RH is 24° C. or higher. 
     
     
         9 . Wadding using the fiber according to  claim 1 . 
     
     
         10 . Wadding containing a fiber A, wherein the content of fiber A in the wadding (100% by weight) is 50% by weight to 100% by weight and down power is 270 cm 3 /g to 400 cm 3 /g, and the fiber A contains inorganic particles having an average particle diameter of 1 μm to 20 μm within the fiber. 
     
     
         11 . The wadding according to  claim 10 , wherein fiber pores having a maximum width of 0.1 μm to 5 μm and maximum length of 1 μm to 50 μm are formed in fiber cross-sections in the axial direction of the fiber. 
     
     
         12 . The wadding according to  claim 10 , wherein the Clo value is 3 to 5. 
     
     
         13 . The wadding according to  claim 10 , wherein the content of the inorganic particles in the fiber A (100% by weight) is 1% by weight to 15% by weight. 
     
     
         14 . The wadding according to  claim 10 , wherein the fiber A is an acrylic fiber. 
     
     
         15 . The wadding according to  claim 10 , wherein the pore volume of the inorganic particles is 0.3 mL/g to 2.0 mL/g and the specific surface area of the inorganic particles is 200 m 2 /g to 800 m 2 /g. 
     
     
         16 . The wadding according to  claim 10 , wherein the inter-fiber coefficient of static friction μ s  of the fiber A is 0.33 to 0.45, single fiber fineness of the fiber A is 0.5 dtex to 20 dtex, single fiber strength of the fiber A is 1.8 cN/dtex to 3.0 cN/dtex, and single fiber elongation of the fiber A is 10% to 50%. 
     
     
         17 . The wadding according to  claim 10 , further containing a chemical fiber differing from the fiber A, and the single fiber fineness of the chemical fiber is 0.5 dtex to 2.2 dtex. 
     
     
         18 . The wadding according to  claim 10 , further containing thermal bonding short fibers, wherein the content of the thermal bonding short fibers in the wadding (100% by weight) is 5% by weight to 30% by weight, and at least a portion of the thermal bonding short fibers are bonded to the fiber A.