Abstract: The present invention relates to multi-ply paper and paperboard products in which individual plies are formed of lingo-cellulosic fibers having different GE brightnesses. The paper or paperboard substrate having top and bottom surfaces comprises a base ply having top and bottom surfaces and comprising ligno cellulosic fibers having a first brightness x. A top ply having top and bottom surfaces comprising ligno cellulosic fibers having a second brightness y which is greater than the first brightness x. The top surface of the top ply forms the top surface of the substrate. An intermediate layer having top and bottom surfaces positioned between the top and base plies. The intermediate layer comprises an organic and inorganic material. The intermediate layer is configured such that the paper or paperboard has a top surface third brightness z which is greater that the first brightness x and is equal to or less than the second brightness y.

Abstract: This invention relates to a paper substrate containing high surface sizing and low internal sizing and having high dimensional stability, as well as methods of making and using the composition.

Abstract: The present invention relates to multi-ply paper and paperboard products in which individual plies are formed of lingo-cellulosic fibers having different GE brightnesses. The paper or paperboard substrate having top and bottom surfaces comprises a base ply having top and bottom surfaces and comprising ligno cellulosic fibers having a first brightness x. A top ply having top and bottom surfaces comprising ligno cellulosic fibers having a second brightness y which is greater than the first brightness x. The top surface of the top ply forms the top surface of the substrate. An intermediate layer having top and bottom surfaces positioned between the top and base plies. The intermediate layer comprises an organic and inorganic material. The intermediate layer is configured such that the paper or paperboard has a top surface third brightness z which is greater that the first brightness x and is equal to or less than the second brightness y.

Abstract: The present invention relates to multi-ply paper and paperboard products in which individual plies are formed of lingo-cellulosic fibers having different GE brightnesses. The paper or paperboard substrate having top and bottom surfaces comprises a base ply having top and bottom surfaces and comprising ligno cellulosic fibers having a first brightness x. A top ply having top and bottom surfaces comprising ligno cellulosic fibers having a second brightness y which is greater than the first brightness x. The top surface of the top ply forms the top surface of the substrate. An intermediate layer having top and bottom surfaces positioned between the top and base plies. The intermediate layer comprises a polymeric binder and pigment. The intermediate layer is configured such that the paper or paperboard has a top surface third brightness z which is greater that the first brightness x and is equal to or less than the second brightness y.

Abstract: This invention relates to composition containing expandable microspheres and at least one ionic compound and having a zeta potential that is greater than or equal to zero mV at a pH of about 9.0 or less at an ionic strength of from 10?6 M to 0.1 M., as well as methods of making and using the composition.

Abstract: The present invention relates to a paper or paperboard substrate containing fiber-filler complexes as well as methods of making and using the same.

Abstract: This invention relates to a process for preparing sized paper and paperboard which incorporates in the paper and paperboard at the size press size a composition comprising one or more “hydrophobic polymers” wherein hydrophobic polymers, the amount of such polymers and the weight ratio of starch to such polymer in the composition are selected such that the paper and paper board exhibits a Cobb Value equal to or less than about 25 and to a sized paper or paperboard web formed by the process.

Abstract: This invention relates to a paper material containing cellulosic fibers and from about 0.1 to about 6.0 wt % by weight dry basis expandable microspheres and a density of at least about 6.0 lb/3000 ft2/mil and articles formed there from such as file folders.

Abstract: The invention provides a low density paperboard material and associated method for use in producing an insulated container, and is especially well-suited for making cups. The paperboard material comprises a paperboard web including wood fibers and expanded microspheres, and has a relatively low density ranging from about 6 to about 10 lb/3MSF/mil, a relatively high caliper ranging from about 24 to about 35 mil, and an internal bond strength of at least about 80×10?3 ft?lbf., preferably at least 100×10?3 lft?lbf. For applications such as cups the material is also coated on one or both sides with a barrier coating, preferably low density polyethylene, to limit liquid penetration into the web. The low density paperboard material of the invention is convertible for manufacture of containers, particularly cups, and exhibits insulative properties comparable to higher cost materials conventionally used to make cups.

Abstract: The specification discloses a method for making a paper material having a reduced tendency to cut human skin. The method includes providing a papermaking furnish containing cellulosic fibers and from about 0.5 to about 5.0 wt % by weight dry basis expandable microspheres, forming a paperboard web from the papermaking furnish, drying the web, and calendaring the web to a caliper of from about 11.0 to about 18.0 mils and a density ranging from about 7.0 to about 12.0 lb/3000 ft2/mil. Papers formed according to the method and articles formed therefrom are also disclosed.