Paperboards having improved bending stiffness and method for making same

Paperboards having improved MD and CD bending stiffness by including a paperboard binder coalescing agent to cause starch paperboard binder to coat at least some of the paperboard fibers. Also a method for preparing these improved bending stiffness paperboards by combining with an untreated paperboard fiber stream a treated paperboard fiber stream where at least some/at least a portion of the paperboard fibers are coated with a starch paperboard binder due to the coalescing action of a paperboard binder coalescing agent.

PAPERBOARDS HAVING IMPROVED BENDING STIFFNESS AND METHOD FOR MAKING SAME

Paperboards having improved MD and CD bending stiffness by including a paperboard binder coalescing agent to cause starch paperboard binder to coat at least some of the paperboard fibers. Also a method for preparing these improved bending stiffness paperboards by combining with an untreated paperboard fiber stream a treated paperboard fiber stream where at least some/at least a portion of the paperboard fibers are coated with a starch paperboard binder due to the coalescing action of a paperboard binder coalescing agent. 1. An article comprising a ply of paperboard comprising:paperboard fibers which comprise at least about 50% by weight hardwood fibers;a paperboard binder, anda paperboard binder coalescing agent in an amount sufficient to cause the starch paperboard binder to coat at least a portion of the paperboard fibers; a caliper of from about 8 to about 28 points;', {'sup': '2', 'a basis weight in the range of from about 105 to about 300 lbs/3000 ft;'}, {'sup': 1', '2.2095', '1, 'y=0.5297x, wherein x is the caliper of the paperboard and yis the MD benching stiffness in Taber Stiffness Units; and'}, 'a MD bending stiffness equal to or greater than a first curve defined by the equation, {'sup': 2', '2.268', '2, 'y=0.2188x, wherein x is the caliper of the paperboard and yis the CD bending stiffness in Taber Stiffness Units.'}, 'a CD bending stiffness equal to or greater than a second curve defined by the equation], 'the paperboard having2. The article of claim 1 , wherein the caliper is in the range of from about 12 to about 18 points.3. The article of claim 1 , wherein the basis weight is in the range of from about 140 to about 200 lbs/3000 ft.4. The article of claim 1 , wherein the paperboard binder coalescing agent comprises the cooked combination of a cationic non-starch polymer and a cationic starch in an amount of at least about 0.1% by weight of the starch paperboard binder.5. The article of claim 4 , wherein the paperboard coalescing agent comprises the ...

Paperboards having improved bending stiffness and method for making same

Paperboards having improved MD and CD bending stiffness by including a paperboard binder coalescing agent to cause starch paperboard binder to coat at least some of the paperboard fibers. Also a method for preparing these improved bending stiffness paperboards by combining with an untreated paperboard fiber stream a treated paperboard fiber stream where at least some/at least a portion of the paperboard fibers are coated with a starch paperboard binder due to the coalescing action of a paperboard binder coalescing agent.

Paperboards having improved bending stiffness and method for making same.

Cartones que tienen una rigidez a la flexión MD y CD mejorada incluyendo un agente coalescente de aglutinante de cartón para hacer que el aglutinante de almidón para cartón recubra al menos algunas de las fibras de cartón. También un método para preparar esos cartones de rigidez a la flexión mejorada combinando con un flujo de fibra de cartón no tratada con un flujo de fibra de cartón tratada donde al menos algunas/al menos una porción de fibras de cartón son recubiertas con un aglutinante de almidón para cartón debido a la acción coalescente de un agente coalescente de aglutinante de cartón.

Paperboards having improved bending stiffness and method for making same

Paperboards having improved MD and CD bending stiffness by including a paperboard binder coalescing agent to cause starch paperboard binder to coat at least some of the paperboard fibers. Also a method for preparing these improved bending stiffness paperboards by combining with an untreated paperboard fiber stream a treated paperboard fiber stream where at least some/at least a portion of the paperboard fibers are coated with a starch paperboard binder due to the coalescing action of a paperboard binder coalescing agent.

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