FIBROUS PRODUCT HAVING A BARRIER LAYER AND METHOD OF PRODUCING THE SAME
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United States of America Patent
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Issued Date -
Sep 15, 2011
app pub date -
Oct 1, 2009
filing date -
Oct 3, 2008
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Abandoned
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Abstract
The invention relates to barrier products and a method for the manufacture thereof. The product comprises a fibrous substrate, a coating layer on at least one surface of the fibrous substrate, and a barrier applied on the coating layer, comprising a thin film with a thickness of less than about 1 micrometer and capable of providing barrier properties to the fibrous product. According to the invention, the coating layer comprises biopolymer, which have been found to be suitable for atomic layer deposition of thin barrier films comprising e.g. metal oxide. Improved oxygen, water vapour and aroma barrier properties can be achieved by the invention for papers and paperboards for packaging purposes.
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