Purified medicinal cannabis non-hemp hurd fiber, and articles containing the same

Abstract

An ozonated medicinal cannabis non-hemp hurd fiber pulp from purified hurd fiber irradiated with natural sunlight or synthetic sunlight or a combination thereof at an irradiance of about 10 W/m2 to about 1,000 W/m2 for a period of time from about 1 to 200 hours, wherein the purified hurd fiber is from cannabis grown at a density lower than used for growing hemp. Also provided are smoking papers containing the irradiated purified hurd fiber, or containing alkaline-treated and ozone-treated hurd fiber from cannabis grown at a density lower than used for growing hemp, wherein the hurd fiber is substantially free of bast fiber and has an average percentage of kinked fibers from about 13% to about 16%, or a coarseness from about 0.195 to about 0.285 mg/m, in combination with a fiber selected from among cannabis bast fiber, wood fiber, or a combination thereof.

What is claimed is: 
     
         1 . An ozonated medicinal cannabis non-hemp hurd fiber pulp from purified hurd fiber irradiated with natural sunlight or synthetic sunlight or a combination thereof at an irradiance of at or about 10 W/m 2  to at or about 1,000 W/m 2  for a period of time from about 1 to about 200 hours, wherein the purified hurd fiber is from cannabis grown at a density lower than used for growing hemp, the lower density promoting branching, flowering and bud formation, and a lower ratio of bast to hurd than cannabis grown for hemp. 
     
     
         2 . A cellulosic smoking paper, comprising the irradiated purified hurd fiber from the ozonated medicinal cannabis non-hemp hurd fiber pulp of  claim 1 . 
     
     
         3 . The cellulosic smoking paper of  claim 2  comprising the ozonated medicinal cannabis non-hemp hurd fiber pulp as the only cellulosic fiber in the cellulosic smoking paper. 
     
     
         4 . The cellulosic smoking paper of  claim 2 , comprising the ozonated medicinal cannabis non-hemp hurd fiber pulp in combination with cannabis bast fiber, wood fiber, or a combination thereof. 
     
     
         5 . The cellulosic smoking paper of  claim 2  having a basis weight of from about 15 to about 90 g/m 2 . 
     
     
         6 . The cellulosic smoking paper of  claim 2 , further comprising a filler, an additive, a coating, or a combination thereof. 
     
     
         7 . The cellulosic smoking paper of  claim 2 , further comprising a filler selected from among a starch, a dextrin, a maltodextrin, gum arabic, calcium carbonate, magnesium carbonate, clay, calcined clay, kaolin, titanium oxide, and a combination thereof, wherein the filler is present in an amount of from about 2.5 wt % to about 60 wt % based on the overall weight of the smoking paper. 
     
     
         8 . The cellulosic smoking paper of  claim 2 , further comprising a burn rate modifier in an amount of from about 0.5 wt % to less than 10 wt % based on the overall weight of the smoking paper. 
     
     
         9 . The cellulosic smoking paper of  claim 2 , further comprising a coating comprising a film forming polymer. 
     
     
         10 . The cellulosic smoking paper of  claim 9 , wherein the film forming polymer is a starch, gum arabic, carboxymethyl cellulose, or a combination thereof, and the film forming polymer is present in an amount of from about 0.1 wt % to about 5 wt % based on the overall weight of the smoking paper. 
     
     
         11 . The cellulosic smoking paper of  claim 2 , further comprising:
 a calcium carbonate in an amount of about 1.5 wt % to about 25wt % based on the overall weight of the smoking paper; and   a burn rate modifier in an amount of from about 0.5 wt % to about 2.5 wt % based on the overall weight of the smoking paper.   
     
     
         12 . The cellulosic smoking paper of  claim 2 , further comprising a watermark or a plurality of watermarks producing areas of increased and decreased fiber concentrations in the paper. 
     
     
         13 . The cellulosic smoking paper of  claim 12 , wherein the plurality of watermarks are positioned in a repeating pattern that, when the cellulosic smoking paper is rolled to form a smoking article, the repeating pattern of watermarks forms of a series of rings about the circumference of the smoking article along the length of the smoking article. 
     
     
         14 . The cellulosic smoking paper of  claim 2 , having a moisture content in the range of from about 1% to about 10% based of the weight of the paper. 
     
     
         15 . The cellulosic smoking paper of  claim 2 , having a permeability of from about 2 to about 45 cubic centimeters per minute (cm 3 ·min −1 ). 
     
     
         16 . The cellulosic smoking paper of  claim 2  that is calendared to have a smooth surface. 
     
     
         17 . A cellulosic smoking paper, comprising:
 alkaline-treated and ozone-treated hurd fiber from cannabis grown at a density lower than used for growing hemp, the lower density promoting branching, flowering and bud formation, and a lower ratio of bast to hurd than cannabis grown for hemp, wherein the hurd fiber is substantially free of bast fiber and has an average percentage of kinked fibers from about 13% to about 16%; and   a fiber selected from among cannabis bast fiber, wood fiber, or a combination thereof.   
     
     
         18 . A cellulosic smoking paper, comprising:
 alkaline-treated and ozone-treated hurd fiber from cannabis grown at a density lower than used for growing hemp, the lower density promoting branching, flowering and bud formation, and a lower ratio of bast to hurd than cannabis grown for hemp, wherein the hurd fiber is substantially free of bast fiber and has a coarseness from about 0.195 to about 0.285 mg/m; and   a fiber selected from among cannabis bast fiber, wood fiber, or a combination thereof.