Security paper or special paper incorporating high resistance synthetic elements and a procedure for obtaining said papers

Abstract

It consists in performing a security paper or special paper incorporating pigments within the paste of the synthetic element itself during its manufacture, providing pigment properties to said synthetic element, the pigments being protected from the attack of physical and chemical agents by the synthetic element itself.

1 . A paper incorporating synthetic elements that are provided with characteristics visible to the naked eye or under certain conditions or “ad hoc” detectors, wherein it comprises security pigments included in the paste of the synthetic element itself, which is polypropylene, and has a low melting point, below the degradation point of the pigments. 
   
   
       2 . The procedure for manufacturing paper incorporating high resistance synthetic elements provided with characteristics that are visible to the naked eye or under certain conditions, such as defined in  claim 1 , wherein the synthetic elements are prepared prior to their introduction in the paper manufacturing procedure by means of an aqueous dispersion thereof in the presence of dispersing or penetrating or antifoaming agents. 
   
   
       3 . The manufacturing procedure for paper according to  claim 2 , wherein the dispersion of security elements is incorporated homogenously in the paper paste during its formation process. 
   
   
       4 . The manufacturing procedure for paper according to  claim 2 , wherein the dispersion of security elements is incorporated to the paper paste in a controlled manner, forming strips or bands where such synthetic elements accumulate. 
   
   
       5 . (canceled) 
   
   
       6 . A security document manufactured by printing on a paper as described in  claim 1 . 
   
   
       7 . A manufacturing procedure for paper according to  claim 2 , further comprising printing a security document on the paper manufactured. 
   
   
       8 . A manufacturing procedure for paper according to  claim 3 , further comprising printing a security document on the paper manufactured. 
   
   
       9 . A manufacturing procedure for paper according to  claim 4 , further comprising printing a security document on the paper manufactured.