PERFORATION OF LAMINATED MATERIALS, LAMINATE COMPRISING A PERFORATED LAYER OF HYDROPHOBIC GEL AND AN IMPERFORATE SUBSTRATE, WOUND DRESSING
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United States of America Patent
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Issued Date -
Sep 22, 2011
app pub date -
Nov 30, 2009
filing date -
Nov 28, 2008
priority date (Note) -
Abandoned
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Abstract
A method is described for introducing perforations into a sheet (1) of laminated material that includes a layer of hydrophobic gel (4). The method involves contacting perforating elements (13) with the sheet and subjecting the sheet (1), at least in the regions contacted with the perforating elements (13), to high frequency mechanical vibrations, eg using a sonotrode (14). The hydrophobic gel (4) is most suitably a silicone gel, and the perforated laminate may be utilised in a wound dressing.
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