Modification of Plastic Sheets

<p><strong>Background</strong><br>

The control of gas permeability of plastic packaging is essential in the food industry. It is especially required for food storage under a special atmosphere to increase durability of food.<!–break–><br><br><strong>Technology</strong><br> The invention refers to a method and machine for the continuous modification of plastic sheets in an electromagnetic radiation (e. g. microwave) chamber under high pressure in the presence of gases, vapors or aerosols.<br> <br> <strong>Benefits</strong></p> <ul> <li>Continuous Infrared (IR) detection of sheet temperature</li> <li>Detection of sheet thickness with IR sensors</li> <li>Nondestructive method for changing polymer structure</li> <li>Modifying permeability and diffusion properties</li> <li>Changing pore size and <a name=“_GoBack“></a>sorption/ desorption properties</li> <li>No change of sheet area</li> </ul><br> <strong>IP Rights</strong><br> German Patent Application February 2010<br> <br> <strong>Patent Owner</strong><br> Beuth-Hochschule für Technik Berlin, Germany</p>

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