Water-absorbing rapidly dryable woven or knitted fabric

Abstract

A water-absorbing quick drying woven or knitted fabric characterized by containing 20% by weight or more of sheath-core type polyester fiber satisfying the following (1) to (4) requirements: (1) the fiber is a modified cross-section fiber having one or more recessed portions in its single yarn section; (2) the sheath part contains polyethylene glycol, and weight ratio of sheath part/core part is in a range of 20/80 to 50/50; (3) an amount of polyethylene glycol in the sheath-core type polyester fiber be in a range of 0.1 to 1.0% by weight; (4) long streak-like grooves A and short streak-like grooves B are present in a mixed state along the direction of fiber axis, and lengths of the streak-like grooves A and streak-like grooves B are 30 μm or more and 15 μm or more, respectively; provided that, P is a ratio of length to width of the groove, and represented by P=[Length]/[Width].

1 . A water-absorbing quick drying woven or knitted fabric characterized by containing 20% by weight or more of sheath-core type polyester fiber satisfying the following (1) to (4) requirements:
 (1) the fiber is a modified cross-section fiber having one or more recessed portions in its single yarn section;   (2) the sheath part contains polyethylene glycol, and weight ratio of sheath part/core part is in a range of 20/80 to 50/50;   (3) an amount of polyethylene glycol in the sheath-core type polyester fiber is in a range of 0.1 to 1.0% by weight;   (4) long streak-like grooves A and short streak-like grooves B are present in a mixed state along the direction of fiber axis, and lengths of the streak-like grooves A and streak-like grooves B are 30 μm or more and 15 μm or more, respectively;   provided that, P is a ratio of length to width of the groove, and represented by P=[Length]/[Width].   
     
     
         2 . The water-absorbing quick drying woven or knitted fabric according to  claim 1 , characterized in that number average molecular weight of polyethylene glycol is 4,000 to 50,000. 
     
     
         3 . The water-absorbing quick drying woven or knitted fabric according to  claim 1  or  2 , characterized by comprising 0.4 to 4.0% by weight of polyethylene glycol in the sheath part. 
     
     
         4 . The water-absorbing quick drying woven or knitted fabric according to any one of  claims 1  to  3 , wherein P of the streak-like grooves A is 75 or more, and P of the streak-like grooves B is less than 50, provided that, P is a ratio of length to width of the groove, and represented by P=[Length]/[Width]. 
     
     
         5 . The water-absorbing quick drying woven or knitted fabric according to any one of  claims 1  to  4 , characterized in that the streak-like grooves A are formed in or around the recessed portions. 
     
     
         6 . The water-absorbing quick drying woven or knitted fabric according to any one of  claims 1  to  5 , characterized by comprising no hydrophilizing agent. 
     
     
         7 . The water-absorbing quick drying woven or knitted fabric according to any one of  claims 1  to  6 , characterized in that number of the streak-like grooves B formed within a length of 30 μm along the direction of fiber axis is 20 or more in average. 
     
     
         8 . The water-absorbing quick drying woven or knitted fabric according to any one of  claims 1  to  7 , characterized in that the modified cross-section is W-shaped. 
     
     
         9 . The water-absorbing quick drying woven or knitted fabric according to any one of  claims 1  to  8 , characterized in that the water droplet disappearance time by falling-drop method after washing the woven or knitted fabric 30 times at 80° C. is 10 seconds or less. 
     
     
         10 . The water-absorbing quick drying woven or knitted fabric according to any one of  claims 1  to  9 , characterized in that the water-absorbing quick drying characteristics after washing the woven or knitted fabric 30 times at 80° C. is 20 minutes or less. 
     
     
         11 . The water-absorbing quick drying woven or knitted fabric according to any one of  claims 1  to  10 , characterized in that the water-absorbing diffusion area after washing the woven or knitted fabric 30 times at 80° C. is 10 cm 2  or more. 
     
     
         12 . A method for producing a dyed water-absorbing quick drying woven or knitted fabric, characterized by subjecting a woven or knitted fabric comprising 20% by weight or more of sheath-core type polyester fiber satisfying the following requirements (5) to (7), to a caustic treatment by 2 to 15% at a temperature of 100° C. with an aqueous alkaline solution comprising alkylbenzyldimethylammonium chloride or lower, followed by subjecting to acid treatment and dyeing:
 (5) the fiber is a modified cross-section fiber having one or more recessed portions in its single yarn section; 
 (6) the sheath part contains 0.4 to 4.0% by weight of polyethylene glycol; 
 (7) weight ratio of sheath part/core part is in a range of 20/80 to 50/50.