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:
Apr. 17, 2012
Filed:
Mar. 17, 2008
Jari Räsänen, Imatra, FI;
Tapani Penttinen, Huutjärvi, FI;
Niilo Pöyhönen, Helsinki, FI;
Stora Enso Oyj, Helsinki, FI;
Abstract
The invention relates to a method of manufacturing board (), a board provided by the method, and a container formed from the same, such as a disposable drinking cup. According to the invention, fiber-based stock is doped with a polymer (), ending in a pulp web that is formed of this pulp on a board machine wire, and in a board layer () that is obtained from the same by pressing and drying. When the board layer is heated, the polymer melts and water vapor bubbles penetrate it, rendering the layer porous. The polymer used for the doping can comprise, for example, a low density polyethylene (LDPE) that has a melt viscosity of about 15. Pore-generating heating can be carried out for the board or only for the container manufactured from it. The porous layer prevents the hot drink enjoyed from the cup from burning the fingers of the user.