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Assignee3M Innovative Properties Company
InventorsBART GOEMAN, ROLF D. SPIELMANN
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The invention provides a method of making a film comprising the steps of: (A) providing a film comprising a layer of thermoplastic polymer having dispersed therein a fluorochemical hydrophilicity imparting compound according to the formula: R f —Q—Z—X—T, wherein Rf represents a partially or fully fluorinated aliphatic group having at least 3 carbon atoms, Q is a linking group or a covalent bond, Z is a poly(oxyalkylene) group, X is an oxygen atom or NR wherein R is a hydrogen atom or an alkyl or aryl group, and T is a hydrogen atom or an organic group having no more than 6 carbon atoms; (B) applying a coating comprising at least one non-volatile component on said film; and (C) when said coating contains volatile components, drying said coating to remove said volatile components from said coating. Further provided are single- and multi-layer films.
Method of making a coated film comprising the steps of:
The method according to any of the preceding claims, wherein the film is mono-axially or biaxially oriented.
A film comprising a layer of thermoplastic polymer having dispersed therein a fluorochemical hydrophilicity imparting compound according to the formula:
A film comprising a first and second layer of thermoplastic polymer, said first and second layer being in contact with each other, and said second layer forming an outermost layer of said film and having dispersed therein a fluorochemical hydrophilicity imparting compound according to the formula:
Dependencies are inferred from the claim text.