Crosslinkage pressure-sensitive adhesive substances by means of electron beams

Abstract

A process for crosslinking a coating of pressures sensitive adhesive systems on a backing material, characterized in that the pressure-sensitive adhesive system present on the backing material is irradiated with accelerated electrons by means of an irradiation means, the backing material coated with the pressuresensitive adhesive system to be irradiated runs via a roller, there is a contact medium between the roller and the backing material during irradiation.

1 .  
   
   
       2 . The process of  claim 15 , wherein the roller is thermally conditioned.  
   
   
       3 . The process of wherein the contact medium does not remain permanently on the roller but instead is applied to the roller before the irradiating and removed from the roller again after the irradiating.  
   
   
       4 . The process of  claim 15 , wherein the contact medium is introduced into the process with the backing.  
   
   
       5 . The process of  claim 15 , the contact medium is a liquid.  
   
   
       6 . The process of  claim 15 , wherein the contact medium comprises one or more additives selected from the group consisting of alkyl alcohols, glycols, ketones, amines, carboxylates, water-soluble cellulose derivatives, sulfonates and/or surfactants.  
   
   
       7 . The process of  claim 15 , wherein the backing coated with the pressure-sensitive adhesive system runs over the roller under applied pressure.  
   
   
       8 . The process of  claim 15 , wherein a surface of the roller is electrically conductive or semiconducting.  
   
   
       9 . The process of  claim 15 , wherein the contact medium and/or the roller and/or a surface of the roller are grounded.  
   
   
       10 . The process  claim 15 , wherein the roller possesses a surface texture, in particular a roughening of the surface.  
   
   
       11 . The process  claim 15 , wherein the roller is a steel roller, especially one which carries the coating for improving the corrosion resistance and/or wettability, the coating being composed in particular of suitable metals, metal oxides or ceramic.  
   
   
       12 . The process  claim 15 , wherein the contact medium is applied to the roller by means of a fluid applicator.  
   
   
       13 . The process  claim 12 , wherein the fluid applicator is thermally conditionable.  
   
   
       14 .  
   
   
       15 . A process for crosslinking a coating of a pressure-sensitive adhesive on a backing, said process comprising the following steps: 
 a) providing a combination comprising said pressure-sensitive adhesive coated on a first face of said backing; and    b) irradiating the combination with accelerated electrons to crosslink the pressure-sensitive adhesive;    wherein a second face of the backing is between the first face and the roller, and a contact medium is between the roller and the second face.    
   
   
       16 . The process of  claim 2 , wherein the roller is thermally contained in a range of from −10° C. to 200° C.  
   
   
       17 . The process of  claim 16 , wherein the roller is thermally contained in a range of from 5° C. to 150° C.  
   
   
       18 . The process of  claim 5 , wherein the contact medium comprises water.  
   
   
       19 . The process of  claim 18 , wherein the contact medium is water admixed with one or more soluble or partly soluble additives.  
   
   
       20 . The process of  claim 10 , wherein the roller possesses a roughening of the surface.  
   
   
       21 . The process of  claim 11 , wherein the roller carries a coating for improving corrosion resistance and/or wettability.  
   
   
       22 . The process of  claim 21 , wherein the coating is composed of metals, metal oxides or ceramics.  
   
   
       23 . The process of  claim 15 , wherein the combination comprises a release layer on said second face of said backing.  
   
   
       24 . A method of adhering an adhesive tape to a substrate, said method comprising the following steps: 
 a) producing an adhesive tape by a process comprising the process of  claim 15;  and    b) adhering the adhesive tape to a substrate.