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US 6,551,653 B1Granted
Metalized polyolefin film
AssigneeTicona LLC
InventorsWilfried Hatke, Karl-Heinz Kochem, Theo Grosse Kreul
Life of this patent
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Abstract
This invention relates to a process for metalizing polyolefin film in which at least one outermost layer of the unmetalized polyolefin film has at least about 90% cycloolefin polymer that has not been subjected to a process for increasing surface tension before metalization. The metalized films are useful as dielectrics in capacitors.
Claims13
A process for preparing a metallized film, comprising:
- extruding a polymeric composition, essentially free of polyester, which comprises a cycloolefin polymer, to obtain a film structure,
- orienting the resulting film structure,
- metallizing a surface of the resulting oriented film structure without previously subjecting said surface to any process for increasing the surface tension of said surface.
A process for metalizing a film with a layer of metal comprising
- (a) extruding a polymeric composition, essentially free of polyester, which comprises at least 90% by weight of the polymeric composition of cycloolefin polymer, using flat-film dies to produce a polymeric film;
- (b) monoaxial or biaxial stretching of the polymeric film by means of a stream of air;
- and
- (c) metalizing a surface of the stretched polymeric film without previously subjecting the surface to any process for increasing the surface tension of the surface before metalization to produce a metalized film;
- wherein the layer of metal is adherently bonded with sufficient strength to the polymeric film to resist delamination in accordance with ASTM D 3359.
2 more elements
A process for metalizing a film with a layer of metal comprising
- (a) extruding a polymeric composition, essentially free of polyester, which comprises at least 90% by weight of the polymeric composition of cycloolefin polymer, the cycloolefin polymer comprising from 0.1 to 95% by weight, based on the total weight of the cycloolefin polymer, of polymerized units of at least one cyclic olefin of the formula I, II, III, IV, V or VI,
- in which, independently, throughout formulae I-VI, R1, R2, R3, R4, R5, R6, R7 and R8 are identical or different and are a hydrogen atom or a C1-C20 hydrocarbon radical, or two or more radicals R1 to R8 are connected to form a ring,
- from 0 to 45% by weight, based on the total weight of the cycloolefin polymer, of polymerized units of at least one monocyclic olefin of the formula VII,
- in which n is a number from 2 to 10,
- from 5 to 80% by weight, based on the total weight of the cycloolefin polymer, of polymerized units of an a cyclic olefin of the formula VIII,
- in which R9, R10, R11 and R12 are identical or different and are a hydrogen atom or C1-C10-hydrocarbon radical, using flat film dies to produce a polymeric film;
- (b) monoaxial or biaxial stretching of the polymeric film by means of a stream of air;
- and
- (c) metalizing a surface of the stretched polymeric film without previously subjecting the surface to any process for increasing the surface tension of the surface before metalization to produce a metalized film, wherein the layer of metal is adherently bonded with sufficient strength to the polymeric film to resist delamination in accordance with ASTM D 3359.
6 more elements
Dependencies are inferred from the claim text.