초록 ▼

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 fr

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.

대표청구항 ▼

What is claimed is: 1. A paper substrate, comprising cellulosic fibers and from 0.5 to 5.0 wt % of microspheres based upon the total weight of the substrate on a dry basis, wherein said substrate comprises cut edges and has a density of from 7.0 to 12.0 lb/3000 ft2/mil and wherein the cut edges exh

What is claimed is: 1. A paper substrate, comprising cellulosic fibers and from 0.5 to 5.0 wt % of microspheres based upon the total weight of the substrate on a dry basis, wherein said substrate comprises cut edges and has a density of from 7.0 to 12.0 lb/3000 ft2/mil and wherein the cut edges exhibits improved resistance to inflicting cuts upon human skin. 2. The paper substrate according to claim 1, wherein the microspheres comprises synthetic polymeric microspheres. 3. The paper substrate according to claim 1, wherein the expanded microspheres are made from at least one material selected from the group consisting of methyl methacrylate, ortho-chlorostyrene, polyortho-chlorostyrene, polyvinylbenzyl chloride, acrylonitrile, vinylidene chloride, para-tert-butyl styrene, vinyl acetate, butyl acrylate, styrene, methacrylic acid, and vinylbenzyl chloride. 4. The paper substrate according to claim 1, wherein said substrate has a Cutting Index of less than 40 when analyzed according to the Cutting Index 30 test. 5. The paper substrate according to claim 1, wherein said microspheres are expanded, unexpanded, or mixtures thereof. 6. The paper substrate according to claim 1, wherein said microspheres comprise at least one volatile fluid. 7. The paper substrate according to claim 1, wherein said microspheres are dispersed within the cellulosic fibers. 8. The paper substrate according to claim 1, wherein the substrate is a folder or jacket. 9. The paper substrate according to claim 1, wherein the substrate is calendared. 10. The paper substrate according to claim 1, wherein said substrate has a caliper of from 11.0 to 18.0. 11. A paper substrate, comprising cellulosic fibers and from 0.5 to 5.0 wt % of microspheres based upon the total weight of the substrate on a dry basis, wherein said substrate comprises cut edges and has a caliper of from 11.0 to 18.0 and wherein the cut edges exhibits improved resistance to inflicting cuts upon human skin. 12. The paper substrate according to claim 11, wherein the microspheres comprises synthetic polymeric microspheres. 13. The paper substrate according to claim 11, wherein said substrate has a Cutting Index of less than 40 when analyzed according to the Cutting Index 30 test.