PERFORATION OF LAMINATED MATERIALS, LAMINATE COMPRISING A PERFORATED LAYER OF HYDROPHOBIC GEL AND AN IMPERFORATE SUBSTRATE, WOUND DRESSING
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Accused Products
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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Citations
58 Claims
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1-28. -28. (canceled)
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29. A method for introducing perforations into a sheet of laminated material that includes a layer of hydrophobic gel, which method includes the steps of
(a) compressing the sheet of laminated material between a sonotrode and a plurality of perforating elements extending from a support; -
(b) operating the sonotrode to apply high frequency mechanical vibrations to the sheet of laminated material such that the perforating elements penetrate and form perforations in the layer of hydrophobic gel; (c) causing the perforating elements to remain in the perforations for a period after formation of the perforations; and (d) withdrawing the sheet of laminated material from the perforating elements. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55)
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- 56. A laminate comprising a perforated layer of hydrophobic gel and an imperforate substrate.
Specification