Non-Combustible Wrapper For Use In Heat But Not Burn Applications

Abstract

A paper well suited for use as a wrapper in heat but not burn sticks is disclosed. The paper includes a base web made from cellulosic fibers combined with a flame retardant filler and/or can include a coating formed from a reduced ignition composition.

1 - 16 . (canceled) 
     
     
         17 . A wrapper for a heat but not burn stick comprising:
 a base web, the base web having a first side and a second and opposite side, the base web comprising a flame retardant filler, the flame retardant filler comprising calcium carbonate, the flame retardant filler being present in the base web in amount less than about 24 wt. %; and   a continuous coating disposed on the first side of the base web, the coating comprising a reduced ignition composition, the reduced ignition composition comprising a polymer material, a cellulose material, or mixtures thereof, the base web having a permeability where coated with the reduced ignition composition of less than about 5 CU and having a diffusivity of less than 0.04 cm/s, the coating having a basis weight from about 0.5 gsm to about 10 gsm.   
     
     
         18 . A wrapper as defined in  claim 17 , wherein the reduced ignition composition comprises an alginate, a starch, or mixtures thereof. 
     
     
         19 . A wrapper as defined in  claim 17 , wherein the reduced ignition composition covers greater than about 80% of the surface area of the first side of the base web. 
     
     
         20 . A wrapper as defined in  claim 17 , wherein the base web contains the flame retardant filler in an amount from about 10% to about 40% by weight. 
     
     
         21 . (canceled) 
     
     
         22 . A wrapper as defined in  claim 17 , wherein the base web has an inherent permeability of from about 0 CU to about 20 CU and has a basis weight of from about 12 gsm to about 100 gsm. 
     
     
         23 . A wrapper as defined in  claim 17 , wherein the wrapper is a single layer wrapper. 
     
     
         24 . A wrapper as defined in  claim 17 , wherein the wrapper includes a plurality of layers, the base web comprising one of the layers. 
     
     
         25 . A wrapper as defined in  claim 17 , wherein the wrapper comprises an aerosol generating material, the aerosol generating material comprising a tobacco. 
     
     
         26 . A wrapper for a heat but not burn stick comprising:
 a base web, the base web having a first side and a second and opposite side, the base web comprising a flame retardant filler, the flame retardant filler comprising calcium carbonate, the flame retardant filler being present in the base web in amount less than about 40 wt. %; and   a continuous coating disposed on the first side of the base web, the coating comprising a reduced ignition composition, the reduced ignition composition comprising a polymer material, a cellulose material, or mixtures thereof, the base web having a permeability where coated with the reduced ignition composition of less than about 5 CU and having a diffusivity of less than 0.04 cm/s, the first side of the base web having a surface area and wherein the reduced ignition composition covers greater than about 90% of the surface area of the first side of the base web.   
     
     
         27 . A wrapper as defined in  claim 26 , wherein the reduced ignition composition comprises an alginate, a starch, or mixtures thereof. 
     
     
         28 . A wrapper as defined in  claim 26 , wherein the base web contains the flame retardant filler in an amount from about 10% to about 40% by weight. 
     
     
         29 . A wrapper as defined in  claim 26 , wherein the base web has an inherent permeability of from about 0 CU to about 20 CU and has a basis weight of from about 12 gsm to about 100 gsm. 
     
     
         30 . A wrapper as defined in  claim 26 , wherein the wrapper is a single layer wrapper. 
     
     
         31 . A wrapper as defined in  claim 26 , wherein the wrapper includes a plurality of layers, the base web comprising one of the layers. 
     
     
         32 . A wrapper as defined in  claim 26 , wherein the wrapper comprises an aerosol generating material, the aerosol generating material comprising a tobacco. 
     
     
         33 . A wrapper for a heat but not burn stick comprising:
 a plurality of layers, the plurality of layers comprising an outer layer and an inner layer, the inner layer comprising a base web, the base web having a first side and a second and opposite side, the base web comprising a flame retardant filler, the flame retardant filler being present in the base web in amount less than about 40 wt. %; and   a continuous coating disposed on the first side of the base web, the coating comprising a reduced ignition composition, the reduced ignition composition comprising a polymer material, a cellulose material, or mixtures thereof, the base web having a permeability where coated with the reduced ignition composition of less than about 5 CU and having a diffusivity of less than 0.04 cm/s.   
     
     
         34 . A wrapper as defined in  claim 33 , wherein the reduced ignition composition comprises an alginate, a starch, or mixtures thereof. 
     
     
         35 . A wrapper as defined in  claim 33 , wherein the base web has an inherent permeability of from about 0 CU to about 20 CU and has a basis weight of from about 12 gsm to about 100 gsm.