Process for manufacturing a film-type packaging material
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United States of America Patent
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Dec 5, 2006
Grant Date -
Apr 8, 2004
app pub date -
Sep 30, 2003
filing date -
Oct 7, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for manufacturing a flexible packaging material from a single or multi-layer film or film-type laminate containing a sealing layer of powder-type starting material deposited on at least one free surface of the film or film-type laminate. The sealing layer is deposited locally, i.e., over only those parts of the surface to be sealed, and the deposition of the sealing layer takes place by an electrostatic coating process in which coating particles are electrostatically charged and transferred to the film surface to be coated by applying an electric field, and melted and/or hardened to give a coating film in the form of a sealing layer.
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