Modification of Plastic Sheets
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>
<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>
German Patent Application February 2010<br>
Beuth-Hochschule für Technik Berlin, Germany</p>
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