Cleaning sheet and method of making

Abstract

A cleaning sheet includes a substrate having opposed major surfaces, an adhesive, such as an adhesive, coated onto at least a portion of at least one of the substrate major surfaces, and loose fibers arranged on the adhesive, wherein at least one of the individual fibers contacts the adhesive at more than one point. A method of making the cleaning sheet is also disclosed.

1 . A cleaning sheet, comprising: 
 (a) a substrate having opposed major surfaces;    (b) an adhesive on at least a portion of at least one of the substrate major surfaces; and    (c) loose fibers arranged on the adhesive, wherein at least one of the individual fibers contacts the substrate or adhesive at more than one point.    
   
   
       2 . A cleaning sheet as defined in  claim 1 , wherein the loose fibers are arranged randomly.  
   
   
       3 . A cleaning sheet as defined in  claim 2 , wherein the individual loose fibers have an average length of at least about 25 millimeters.  
   
   
       4 . A cleaning sheet as defined in  claim 3 , wherein a majority of the loose fibers contact the substrate at more than one point.  
   
   
       5 . A cleaning sheet as defined in  claim 4 , wherein the majority of loose fibers contact the adhesive at more than one point.  
   
   
       6 . A cleaning sheet as defined in  claim 5 , wherein the adhesive is a pressure sensitive adhesive.  
   
   
       7 . A cleaning sheet as defined in  claim 6 , wherein the region having loose fibers defines a loose fiber layer having a basis weight of no greater than about 20 g/m 2 .  
   
   
       8 . A cleaning sheet as defined in  claim 7 , wherein the loose fiber layer has an average thickness of no greater than about 3 millimeters.  
   
   
       9 . A cleaning sheet as defined in  claim 8 , wherein the loose fibers are crimped.  
   
   
       10 . A cleaning sheet as defined in  claim 9 , wherein loose fibers include a blend of fibers having different deniers.  
   
   
       11 . A cleaning sheet as defined in  claim 10 , wherein both major surfaces of the substrate are coated with adhesive.  
   
   
       12 . A cleaning sheet as defined in  claim 11 , wherein the adhesive is a continuous layer provided on the entire major surface of the substrate.  
   
   
       13 . A cleaning sheet as defined in  claim 12 , wherein at least one major surface of the substrate has a macroscopically three-dimensional surface topography.  
   
   
       14 . A cleaning sheet as defined in  claim 13 , wherein the loose fibers define an outward surface of the cleaning sheet that is macroscopically planar.  
   
   
       15 . A disposable cleaning sheet, comprising: 
 (a) a fibrous spunbond nonwoven substrate having a basis weight ranging from about 40 g/m 2  to about 60 g/m 2 , the substrate including at least one major surface having a three-dimensional surface topography;    (b) a pressure sensitive adhesive coated onto at least a portion of at least one of the substrate major surfaces; and    (c) a layer of crimped loose fibers arranged randomly on the adhesive surface of the substrate, wherein the layer of loose fibers has a basis weight of no greater than about 20 g/m 2 , the loose fibers have an average length of at least about 25 millimeters, the majority of the loose fibers contact the substrate at more than one point, and the loose fibers define a macroscopically planar outward surface of the cleaning sheet.    
   
   
       16 . A method of making a cleaning sheet, comprising the steps of: 
 (a) providing a web of material having an adhesive coated on at least a portion the web; and    (b) randomly depositing loose fibers on the web at least in the regions of the adhesive, thereby attaching the loose fibers to the web.    
   
   
       17 . The method of  claim 16 , wherein the loose fibers are deposited by staple fiber handling equipment.  
   
   
       18 . The method of  claim 16 , further comprising the step of forcing the loose fibers against the web.  
   
   
       19 . The method of  claim 16 , wherein the loose fibers are applied to the substrate at a generally constant thickness, and the loose fibers define an outward surface that is macroscopically planar.  
   
   
       20 . A cleaning sheet made according to the process of  claim 16.