发明名称 |
Paperboards having improved bending stiffness and method for making same |
摘要 |
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. |
申请公布号 |
US8801899(B1) |
申请公布日期 |
2014.08.12 |
申请号 |
US201314020288 |
申请日期 |
2013.09.06 |
申请人 |
International Paper Company |
发明人 |
Reed David V.;Dyer David A |
分类号 |
D21F11/00 |
主分类号 |
D21F11/00 |
代理机构 |
|
代理人 |
Ryan, III Thomas W.;Guttag Eric W. |
主权项 |
1. An article comprising a ply of paperboard comprising:
paperboard fibers which comprise at least about 50% by weight hardwood fibers; a starch paperboard binder, and a paperboard binder coalescing agent in an amount sufficient to cause the starch paperboard binder to coat at least a portion of the paperboard fibers; the paperboard having:
a caliper of from about 8 to about 28 points;a basis weight in the range of from about 105 to about 300 lbs/3000 ft2;a MD bending stiffness equal to or greater than a first curve defined by the equation:
y1=0.5297x2.2095,wherein x is the caliper of the paperboard and y1 is the MD bending stiffness in Taber Stiffness Units; anda CD bending stiffness equal to or greater than a second curve defined by the equation:
y2=0.2188x2.2681,wherein x is the caliper of the paperboard and y2 is the CD bending stiffness in Taber Stiffness Units. |
地址 |
Memphis TN US |