Articles of manufacture made from pulp composition

Abstract

One aspect of the invention relates to an article of manufacture made from a pulp composition comprising an ARF pulp. In one embodiment, the pulp composition made from agricultural renewable fibers (ARF) having low Kappa number with unexpected quality sufficient for papermaking (e.g., high strength parameters and high freeness). In another embodiment, the ARF pulp has ISO brightness of 60% or higher, and unexpected quality sufficient for papermaking (e.g. high strength parameters and high freeness). In another embodiment, the ARF pulp is made from a pulping process comprising using a high concentration of anthraquinone (AQ).

1 . An article of manufacture made from a pulp composition comprising:
 fibers from an agricultural renewable fiber source, wherein the pulp composition is unbleached and has a Kappa number of about 20 or less, a high freeness of at least about 400 mL CSF, and a tensile of at least about 5.50 km, a tear index of at least about 6.00 mN·m 2 /g, and a burst index of at least about 3.00 kPa·m 2 /g.   
     
     
         2 . The article of manufacture of  claim 1  selected from the group consisting of tissue, printing and writing papers, communication papers, bleached board, food contact packaging papers, OGR, bleached packaging grades, liquid packaging, wet strength papers, release liner, recycled linerboard and molded packaging products. 
     
     
         3 . The article of manufacture of  claim 1 , wherein the Kappa number is about 19 or less. 
     
     
         4 . The article of manufacture of  claim 1 , wherein the Kappa number is about 18 or less. 
     
     
         5 . The article of manufacture of  claim 1 , wherein the Kappa number is about 15 or less. 
     
     
         6 . The article of manufacture of  claim 1 , wherein the Kappa number is about 10 or less. 
     
     
         7 . The article of manufacture of anyone of  claims 1 , wherein the agricultural renewable fiber source is bagasse, corn stover, wheat straw, cereal straws, rice straw, soy residuals, coconut tissues, cotton stalks, palm baskets, kenaf, industrial hemp, seed flax straw, textile flax straw, sisal, hesperaloe, rye grass, or combinations thereof. 
     
     
         8 . The article of manufacture of anyone of  claims 2 , wherein the agricultural renewable fiber source is bagasse, corn stover, wheat straw, cereal straws, rice straw, soy residuals, coconut tissues, cotton stalks, palm baskets, kenaf, industrial hemp, seed flax straw, textile flax straw, sisal, hesperaloe, rye grass, or combinations thereof. 
     
     
         9 . The article of manufacture of anyone of  claims 3 , wherein the agricultural renewable fiber source is bagasse, corn stover, wheat straw, cereal straws, rice straw, soy residuals, coconut tissues, cotton stalks, palm baskets, kenaf, industrial hemp, seed flax straw, textile flax straw, sisal, hesperaloe, rye grass, or combinations thereof. 
     
     
         10 . An article of manufacture made from a pulp composition comprising fibers from an agricultural renewable fiber source, wherein the pulp composition has an unbleached Kappa number of about 20 or less, a high freeness of at least about 400 mL CSF, and strength parameters sufficient for papermaking. 
     
     
         11 . The article of manufacture of  claim 10 , wherein the ISO brightness is less than 50% ISO. 
     
     
         12 . The article of manufacture of  claim 10 , wherein the agricultural renewable fibers are bagasse, corn stover, wheat straw, cereal straws, rice straw, soy residuals, coconut tissues, cotton stalks, palm baskets, kenaf, industrial hemp, seed flax straw, textile flax straw, sisal, hesperaloe, rye grass, or combinations thereof. 
     
     
         13 . The article of manufacture of  claim 10  selected from the group consisting of tissue, printing and writing papers, communication papers, bleached board, food contact packaging papers, OGR, bleached packaging grades, liquid packaging, wet strength papers, release liner, recycled linerboard and molded packaging products. 
     
     
         14 . An article of manufacture made from a pulp composition comprising a pulp made from a pulping method comprising:
 providing a first mixture comprising the reaction products of:
 fibers, 
 water, 
 anthraquinone or derivative thereof having concentration of about 0.1% by weight or greater of the dry fiber, and 
 an alkali, 
 wherein the mixture has a liquid to dry fiber ratio from about 4 to about 10, and an initial Kappa number of about 60 or greater; and 
   reacting the mixture for a cooking time and at a cooking condition sufficient to form a second mixture having a Kappa number of about 20 or less, high freeness of at least about 400 mL CSF, and strength parameters sufficient for papermaking.   
     
     
         15 . The article of manufacture of  claim 14 , wherein the strength parameters sufficient for papermaking are selected from the group consisting of a tensile of at least about 5.50 km, a tear index of at least about 6.00 mN·m 2 /g, a burst index of at least about 3.00 kPa·m 2 /g, or a combination thereof. 
     
     
         16 . The article of manufacture of  claim 14 , wherein the second mixture has a Kappa number of about 10 or less. 
     
     
         17 . The article of manufacture of  claim 14 , wherein the fibers comprising agricultural renewable fibers selected from the group consisting of bagasse, corn stover, wheat straw, cereal straws, rice straw, soy residuals, coconut tissues, cotton stalks, palm baskets, kenaf, industrial hemp, seed flax straw, textile flax straw, sisal, hesperaloe, rye grass, and combinations thereof. 
     
     
         18 . The article of manufacture of  claim 15 , wherein the pulping method further comprises bleaching the second mixture. 
     
     
         19 . The article of manufacture of  claim 14 , wherein the agricultural renewable fiber pulp has an ISO brightness of about 60% or higher. 
     
     
         20 . The article of manufacture of  claim 14 , wherein the fibers comprising wood fibers