Laser engravable flexographic printing articles based on millable polyurethanes, and method
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United States of America Patent
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Jun 10, 2014
Grant Date -
Oct 31, 2013
app pub date -
Jun 25, 2013
filing date -
Jun 27, 2006
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Abstract
A flexographic printing sleeve or plate is made by a method that includes providing a millable polyurethane, crosslinking the millable polyurethane, and forming a relief by at least laser engraving the crosslinked millable polyurethane. For example, crosslinking may be accomplished by a peroxide-based process or by a vulcanization process using sulfur. A relief in one example is formed by extruding the millable polyurethane, thermally crosslinking the polyurethane after the extrusion step and laser engraving the crosslinked millable polyurethane. A printing article is formed into the shape of a flat printing plate or a continuous in-the-round printing sleeve.
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