Twisting paper

Abstract

A twisting paper substrate to be waxed for the production of an opaque waxed paper wrapping, wherein the paper substrate includes a fibrous base, at least one opacifying additive and at least one binder reducing penetration of wax in the fibrous base during the production of the waxed paper substrate by application of wax on the paper substrate, wherein the difference of opacity of the paper substrate before and after Cobb test according to the rizinus Cobb method on one side to be waxed of the paper substrate is most preferably less than or equal to 8 percent.

1 . A twisting paper substrate to be waxed for the production of an opaque waxed paper wrapping, wherein the paper substrate comprises a fibrous base, at least one opacifying additive and at least one binder reducing penetration of wax in the fibrous base during the production of the waxed paper substrate by application of wax on the paper substrate, wherein the difference of opacity of the paper substrate before and after the Cobb test according to the Rizinus Cobb method on one side to be waxed of the paper substrate is less than or equal to 8 percent. 
     
     
         2 . The paper substrate according to  claim 1 , wherein said difference of opacity is less than or equal to 5 percent. 
     
     
         3 . The paper substrate according to  claim 1 , wherein said difference of opacity is fulfilled regardless of the side of the paper substrate chosen for the application of the castor oil. 
     
     
         4 . The paper substrate according to  claim 1 , wherein the at least one opacifying additive comprises TiO 2  or zinc sulfide. 
     
     
         5 . The paper substrate according to  claim 1 , wherein the at least one binder is a water soluble binder, wherein the at least one water soluble binder is selected from PVOH or starch or a mixture of PVOH and starch. 
     
     
         6 . The paper substrate according to  claim 1 , wherein the at least one binder is a water insoluble binder, wherein the at least one water insoluble binder is selected from latex made from polymers and copolymers from several monomers. 
     
     
         7 . The paper substrate according to  claim 1 , wherein the paper substrate comprises a mixture of at least one water soluble binder, wherein the binder is selected from PVOH or starch or a mixture of PVOH and starch, and at least one water insoluble binder, wherein the binder is selected from latex made from polymers and copolymers from several monomers. 
     
     
         8 . The paper substrate according to  claim 1 , wherein the paper substrate comprises at least one softening agent, wherein the at least one softening agent is selected from urea, nitrate, a mixture of urea and sodium nitrate, or an organic plasticizer including sorbitol, sorbitol ether, polyethylene glycol or glycerol. 
     
     
         9 . The paper substrate according to  claim 1 , having a basis weight of less than or equal to 60 g/m 2  according to the standard ISO 536. 
     
     
         10 . The paper substrate according to  claim 1 , having a surface energy higher than or equal to 25 J/m 2 . 
     
     
         11 . A waxed paper wrapping, comprising the paper substrate according to  claim 1  and a coating of wax on at least one side of the paper substrate. 
     
     
         12 . The waxed paper wrapping according to  claim 11 , wherein the wax is present on at least one side of the paper substrate, the wax forming one layer on each of the application side(s) of the paper substrate and penetrating at least partially in the fibrous base. 
     
     
         13 . The waxed paper wrapping according to  claim 11 , wherein the difference of opacity between the paper substrate, before application of wax, and the waxed paper wrapping is less than or equal to 10%. 
     
     
         14 . A method for producing a twisting paper substrate to be waxed for the production of an opaque waxed paper wrapping as defined in  claim 1 , wherein the paper substrate comprises a fibrous base, at least one opacifying additive and at least one binder reducing penetration of wax in the fibrous base during the production of the waxed paper substrate by application of wax on the paper substrate, wherein the binder is applied on at least one side to be waxed of a paper web comprising the fibrous base. 
     
     
         15 . A method for producing the paper substrate according to  claim 1 , wherein the at least one binder is applied on at least one side to be waxed of a paper web comprising the fibrous base. 
     
     
         16 . The method according to  claim 14 , the binder being part of a surface coating composition which is applied on said side to be waxed of the paper web, the surface coating composition being applied on said side in an amount of less than or equal to 5 g/m 2  dry weight. 
     
     
         17 . The method according to  claim 14 , the at least one opacifying additive being mixed to the fibrous base before formation of the paper web. 
     
     
         18 . The method according to  claim 14  for producing the paper substrate comprising at least one softening agent selected from urea, nitrate, a mixture of urea and sodium nitrate, or an organic plasticizer including sorbitol, sorbitol ether, polyethylene glycol or glycerol,
 wherein the at least one softening agent and the at least one binder are applied on at least one side to be waxed of the paper web, at the same or at different steps. 
 
     
     
         19 . A method for producing a waxed paper wrapping according to  claim 11 , comprising:
 the production of the paper substrate comprising a fibrous base, at least one opacifying additive and at least one binder reducing penetration of wax in the fibrous base during the production of the waxed paper substrate by application of wax on the paper substrate, wherein the difference of opacity of the paper substrate before and after the Cobb test according to the Rizinus Cobb method on one side to be waxed of the paper substrate is less than or equal to 8 percent;   and application of the wax on the paper substrate.   
     
     
         20 . A method for packaging food, comprising twisting around the food a waxed paper wrapping according to  claim 11 . 
     
     
         21 . A packaged food product comprising a food product and a waxed paper wrapping according to  claim 11 , twisted around the food product. 
     
     
         22 . The packaged food product according to  claim 21 , wherein the food product is a confectionery food product.