Nonwoven fabric, process for producing the same, sanitary material and sanitary supply

Abstract

Polyolefin resin-based non-woven fabric characterized by containing a fatty acid amide compound, and by having a static friction coefficient of 0.1 to 0.4. Production of such non-woven fabric is achieved by subjecting, for example, non-woven fabric containing 0.05 to 1 wt. % erucamide to an aging treatment at 30 to 60° C. for 5 to 50 hours.

1 . Polyolefin resin-based non-woven fabric characterized by that it contains a fatty acid amide compound, and that its static friction coefficient is 0.1 to 0.4.  
     
     
         2 . Polyolefin resin-based non-woven fabric as described in  claim 1  wherein the fatty acid amide compound is erucamide, and its content is 0.05 to 1.0 wt. %.  
     
     
         3 . Polyolefin resin-based non-woven fabric as described in  claim 1  or  2  wherein the fiber constituting the non-woven fabric has a diameter of 1 to 50 μm.  
     
     
         4 . Polyolefin resin-based non-woven fabric as described in any one of  claims 1  to  3  which has an mass per unit area of 5 to 200 g/m 2 .  
     
     
         5 . Polyolefin resin-based non-woven fabric as described in any one of  claims 1  to  4  which is spunbonded non-woven fabric.  
     
     
         6 . Polyolefin resin-based non-woven fabric as described in any one of  claims 1  to  5  wherein the polyolefin resin is a polypropylene resin.  
     
     
         7 . Polyolefin resin-based non-woven fabric as described in  claim 6  wherein the polypropylene resin is crystallizable, and has an isotactic pentad fraction of 88 to 95 mol. %.  
     
     
         8 . Polyolefin resin-based non-woven fabric as described in  claim 6  or  7  wherein the melt index (MI) of the polypropylene resin is 5 to 200 g/10 min.  
     
     
         9 . Multi-layered non-woven fabric comprising polyolefin resin-based non-woven fabric as described in any one of  claims 1  to  8  at least on one surface.  
     
     
         10 . Multi-layered non-woven fabric as described in  claim 9  wherein the fabric has a three layered structure comprising a spunbonded non-woven fabric layer/meltblown non-woven fabric layer/spunbonded non-woven fabric layer, and those non-woven fabric layers have an mass per unit area of 7 to 25 g/m 2 .  
     
     
         11 . A method for producing polyolefin resin-based non-woven fabric as described in any one of  claims 1  to  10  comprising subjecting non-woven fabric obtained by melting a polyolefin resin containing a fatty acid amide compound and by spinning the melt into fiber, to an aging treatment at 30 to 60° C. for 5 to 50 hours.  
     
     
         12 . A sanitary material comprising polyolefin resin-based non-woven fabric as described in any one of  claims 1  to  10 .  
     
     
         13 . A sanitary material as described in  claim 12  wherein the polyolefin resin is a polypropylene resin which is crystallizable and has an isotactic pentad fraction of 88 to 95 mol. %.  
     
     
         14 . A sanitary material as described in  claim 12  or  13  wherein the polyolefin resin is a polypropylene resin which has a melt index (MI) of 30 to 80 g/10 min.  
     
     
         15 . A sanitary material as described in any one of  claims 12  to  14  which is applicable to a disposable diaper, sanitary napkin or incontinence pad.  
     
     
         16 . A sanitary article made from a sanitary material as described in any one of  claims 12  to  14 .  
     
     
         17 . A sanitary article as described in  claim 16  which is applicable to a disposable diaper, sanitary napkin or incontinence pad.