Technological Development on Layered Products for Foods and/or Foodstuff-Evaluation by Patenting Documents  

作　　者：M. E. M. Martinez P. C. Reis D. A. Santos E. Winter 

机构地区：[1]National Institute of Industrial Property of Brazil （INPI）, Rua Mayrink Veiga, n° 9-19° andar-Centro-Rio de Janeiro/RJ-Cep：20090-910, Brasil [2]Academy of Intellectual Property, National Institute of Industrial Property of Brazil （INPI）, Rua Mayrink Veiga, n° 9-19°andar-Centro-Rio de Janeiro/RJ-Cep： 20090-910, Brasil

出　　处：《Journal of Food Science and Engineering》2011年第2期100-110,共11页食品科学与工程（英文版）（美国）

摘　　要：Packaging is one of the most important methods of keeping the quality of food products for storage, transportation and end-use. The price of materials employed for packaging food has traditionally been high and used to be more expensive than the food itself. Technological innovations made possible to produce packaging materials cheaply. One of these processes is known as co-extrusion. This technique makes a film with two or more layers with different plastics not laminating the layers together with an adhesive, eliminating the use of solvents and producing a film in just one step instead multiple steps. In this background, our paper relates to the evolution on packaging for foods by using patenting documents. A search for patent documents was performed on free patent databases using keywords and International Patent Classification （IPC） codes related to this technology. As results： （a） 17% of the 21,472 documents found are focused on multilayer packaging for food; （b） 12 countries hold more than 90% of patents （38% Japan; 23% The United States of America; 7% Canada and 6% Germany）; and, （c） two peaks were perceived in the period of 1992-1994 and 2003, and matches, respectively, the Persian Gulf （1990-1991） and Iraq Wars （2003-invasion of Iraq）, so the historical tendency is confirmed： ＂wars also generate scientific and technological innovations＂.

关 键 词：Multilayer packaging for food layered products for foods patent documents technological mapping. 

分 类 号：TS202.3[轻工技术与工程—食品科学] G306.3[轻工技术与工程—食品科学与工程]