Protective film

Abstract

A protective film contains a base material and a pressure-sensitive adhesive layer formed thereon, wherein the surface of the pressure-sensitive adhesive layer has a contact angle with methylene iodide as measured just after contact, θ 1 , of 70° or smaller and a change in contact angle with methylene iodide through 30-second standing, Δθ, of 8% or less.

1 - 9 . (canceled)  
     
     
         10 . An electromagnetic shielding material comprising a metal layer or metal oxide layer and a protective film comprising a base material and a pressure-sensitive adhesive layer formed thereon, 
 wherein the surface of the pressure-sensitive adhesive layer has a contact angle with methylene iodide as measured just after contact, θ 1 , of 70° or smaller and a change in contact angle with methylene iodide through 30-second standing, Δθ, of 8% or less, and    wherein the protective film protects the surface of the metal layer or metal oxide layer.    
     
     
         11 . An electromagnetic shielding material comprising a metal layer or metal oxide layer and a protective film comprising a base material and a pressure-sensitive adhesive layer formed thereon, 
 wherein the surface of the pressure-sensitive adhesive layer has a contact angle with methylene iodide as measured just after contact, θ 1 , of 70° or smaller and a change in contact angle with methylene iodide through 30-second standing, Δθ, of 8% or less;    wherein the pressure-sensitive adhesive layer comprises a (meth)acrylic polymer as a main polymer; and    wherein the protective film protects the surface of the metal layer or metal oxide layer, wherein the protective film protects the surface of the metal layer or metal oxide layer.