Protective tape used for optical member, optical film with protective tape, and image viewing display with protective tape

Abstract

A protective tape used for optical member includes a plastic film base, an adhesive layer formed on one side of the plastic film base, and a treated layer formed on an opposite side of the plastic film base. The treated layer is formed with a treat agent containing a silicone resin and a cellulose polymer. The protective tape used for optical member is enabled to direct print with an ink on the treated layer and have a low adhesive property with the adhesive applied to an optical film.

1 . A protective tape used for an optical member, comprising a plastic film base, an adhesive layer formed on one side of the plastic film base, and a treated layer formed on an opposite side of the plastic film base, 
 wherein the treated layer is formed with a treat agent comprising a silicone resin and a cellulose polymer.    
   
   
       2 . The protective tape according to  claim 1 , wherein the plastic film is a polyester film.  
   
   
       3 . The protective tape according to  claim 1 , wherein the silicone resin is constituted by organo polysiloxanes comprising three-dimensional copolymers having monofunctional unit M represented by a general formula R 3 SiO— and having at least one kind unit selected from a group consisting of trifunctional unit T represented by a general formula RSi(O—) 3 ; difunctional unit D represented by a general formula R 2 Si(O—) 2 ; and tetrafunctional unit Q represented by a general formula Si(O—) 4  where, R represents monovalent hydrocarbon group, alkenyl or hydroxyl group.  
   
   
       4 . The protective tape according to  claim 3 , wherein the R is a hydrocarbon group selected from the group consisting of methyl group, ethyl group, propyl group, and phenyl groups.  
   
   
       5 . The protective tape according to  claim 3 , wherein the three-dimensional copolymers are an MQ resin having unit M and unit Q.  
   
   
       6 . The protective tape according to  claim 1 , wherein the release agent further comprises a silicone gum in an amount of 1-20% by weight of a sum total weight of the silicone resin and the silicone gum.  
   
   
       7 . The protective tape according to  claim 6 , wherein the silicon gum is dimethylsiloxanes.  
   
   
       8 . The protective tape according to  claim 1 , wherein a ratio of the cellulose polymer to the release agent is 2/100 to 400/100 by weight.  
   
   
       9 . A protective tape used for an optical member, comprising a plastic film base, an adhesive layer formed on one side of the plastic film base, and a treated layer formed on an opposite side of the plastic film base, 
 wherein the treated layer is formed with a treat agent comprising a release agent containing long chain alkyl group, a silicone resin and a cellulose polymer.    
   
   
       10 . The protective tape according to  claim 9 , wherein the plastic film is a polyester film.  
   
   
       11 . The protective tape according to  claim 9 , wherein the release agent containing long chain alkyl group is acrylic polymer containing alkyl group with carbon numbers of 8 or more, and comprise acrylonitrile as copolymerization components.  
   
   
       12 . An optical film with a protective tape, wherein the protective tape used for optical member according to  claim 1  attached on the optical film.  
   
   
       13 . An optical film with a protective tape, wherein the protective tape used for optical member according to  claim 9  attached on the optical film.  
   
   
       14 . An image viewing display with a protective tape, wherein the protective tape used for optical member according to  claim 1  attached on the image viewing display.  
   
   
       15 . An image viewing display with a protective tape, wherein the protective tape used for optical member according to  claim 9  attached on the image viewing display.