The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 25, 2005
Filed:
Sep. 19, 2003
Kosaraju Krishna Mohan, Texarkana, TX (US);
Alexander A. Koukoulas, Ridgewood, NJ (US);
Peter Matthew Froass, Chester, NY (US);
David Verd Reed, Blanchester, OH (US);
Kosaraju Krishna Mohan, Texarkana, TX (US);
Alexander A. Koukoulas, Ridgewood, NJ (US);
Peter Matthew Froass, Chester, NY (US);
David Verd Reed, Blanchester, OH (US);
International Paper Company, Purchase, NY (US);
Abstract
The invention provides a low density paperboard material 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 80×10ft-lbpreferably at least 100×10ft-lb. 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 the surface of the low density board may have a Sheffield smoothness of 300 SU or greater.