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US 2006/0231227 A1Published application
Paper and paper articles and method for making same
OwnerRichard Williams, Peter Froassinventors
Life of this patent
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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.
Claims37
1-36. (canceled)
A paper material for use in the manufacture of paper articles, comprising a web of cellulosic fibers and from about 0.1 to about 6 wt % based upon a total weight of the web on a dry basis of expanded microspheres, the paper web having a density equal to or greater than 7.5 lb/3000 ft2/mil;
- a caliper after calendaring of from about 3 mils to about 25 mils.
Dependencies are inferred from the claim text.