Continuous process for surface modification of cigarette filter materials
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United States of America Patent
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Jan 20, 2009
Grant Date -
May 11, 2006
app pub date -
Nov 9, 2004
filing date -
Nov 9, 2004
priority date (Note) -
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Abstract
Process and apparatus are provided for depositing target materials onto the surface of a moving substrate which may be used in the preparation of composites, cigarette filters, cigarette wrapper, bandages, biomedical applications, cosmetic and cleaning materials, and the like. A moving substrate comprising a fibrous mat or paper passes through one or more reaction chambers each having hot and cold regions. At least one target material is positioned in the hot region, and a laser beam ablates the material thereby producing modified additive material. As the substrate moves through the cold region of the reaction chamber, the modified additive material adheres to the exposed surface of the substrate.
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