Graffiti and/or environmental protective article having removable sheets

Abstract

This invention relates to an article comprising a transparent stack of sheets that may be applied, for example, to protect substrates such as glass or plastic windows, signage or displays. A topmost sheet can be peeled away after it is damaged to reveal an undamaged sheet below. The invention also relates to the protected substrates and a method of protecting substrates such as glass or plastic windows, signage and displays from vandalism or other surface damage by adhering the stack of sheets to the substrate to be protected and subsequently pulling a topmost sheet away from the stack after it becomes damaged.

What is claimed is:  
     
         1 . An article comprising: 
 a stack of sheets, wherein each sheet independently comprises: 
 (a) a film, the film having a first side having a surface area and an opposite second side having a surface area;  
 (b) a bonding layer having a first side having a surface area and an opposite second side having a surface area, wherein the bonding layer is bonded via its first side to the second side of the film such that at least a center of the surface area of the second side of the film is in contact with the bonding layer, wherein at least about 50 percent of the surface area of the second side of the film has the bonding layer bonded thereto; 
 wherein each sheet is stacked upon another sheet such that except for a bottom sheet of the stack of sheets, the bonding layer of a sheet is in contact with the film, of a sheet below;  
 wherein a topmost sheet can be removed from the stack of sheets by pulling it away from the stack such that the sheet being removed from the stack as well as the sheets remaining with the stack do not delaminate;  
 wherein the stack of sheets when subjected to a visual acuity test using a 3 meter Snellen eye chart can allow an observer with 6 meter/6 meter vision to read a line on the eye chart which is indicative of about 6 meter/9 meter vision or better.  
 
   
     
     
         2 . The article of  claim 1 , wherein when subjected to a visual acuity test using a 3 meter Snellen eye chart can allow an observer with 6 meter/6 meter vision to read the line on the eye chart which is indicative of about 6 meter/6 meter vision or better.  
     
     
         3 . The article of  claim 1 , wherein the stack of sheets is transparent.  
     
     
         4 . The article of  claim 1 , wherein each sheet has a penetration resistance of at least about 0.5 kg.  
     
     
         5 . The article of  claim 1  which comprises at least about 3 sheets.  
     
     
         6 . The article of  claim 1 , wherein the film has a thickness ranging from about 25 to about 4000 microns.  
     
     
         7 . The article of  claim 1 , wherein the film comprises multiple layers.  
     
     
         8 . The article of  claim 1 , wherein the article further comprises a plurality of tabs, wherein a separate tab is bonded to a portion of the second side of the bonding layer of each of the sheets in a manner such that the tab on the topmost sheet can be used to pull the topmost sheet away from the stack of sheets.  
     
     
         9 . The article of  claim 1 , wherein for each sheet at least a portion of a margin of the film does not have bonding material bonded thereto in a similar location such that the topmost sheet can be removed by grasping the portion of the barrier film without bonding material bonded thereto and pulling it away from the stack.  
     
     
         10 . The article of  claim 9 , wherein for each sheet the portion of the margin which does not have bonding material bonded thereto is a corner of the sheet.  
     
     
         11 . The article of  claim 1 , wherein for each sheet at least a portion of a margin of the bonding material is detackified in a similar location wherein the topmost sheet can be removed by grasping the sheet where the bonding material is detackified and pulling it away from the stack.  
     
     
         12 . The article of  claim 11 , wherein for each sheet the portion of the margin where the bonding material is detackfied is a corner of the sheet.  
     
     
         13 . The article of  claim 1 , wherein each sheet has a hole which extends through that sheet in a margin of the sheet, wherein the holes in the sheets are staggered such that the holes do not overlap and wherein the topmost sheet can be removed from the stack of sheets by using a tool which can be inserted in the hole of the topmost sheet and used to pull the topmost sheet away from the stack.