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US 5,401,334 AGranted
Fluoropolymer aluminum laminate
AssigneeTiteflex Corporation
InventorsLawrence F. O'Melia, Anthony J. Lalikos
Life of this patent
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Abstract
An aluminum fluoropolymer laminate and a method for making such a laminate which includes conversion coating the aluminum and bonding the fluoropolymer onto the conversion coated aluminum is described.
Claims18
A method for bonding aluminum to a preexisting fluoropolymer structure, the method comprising:
- applying a chromate conversion coating composition to an aluminum surface to provide a conversion coating on the aluminum;
- superposing the fluoropolymer structure onto the conversion coated aluminum to contact the fluoropolymer with the conversion coating on the aluminum surface to provide a superposed conversion coated aluminum fluoropolymer laminate, the conversion coating on the aluminum having a consistency of a gel and including fluoride ions;
- and
- heating the superposed fluoropolymer-conversion coated aluminum laminate to at least about 700.degree. F. for a time and at a pressure to effectively bond the conversion coated aluminum to the preexisting fluoropolymer structure to provide a fluoropolymer aluminum laminate.
1 more element
A method for bonding a fluoropolymer structure to aluminum, the method comprising:
- applying a chromate conversion coating to aluminum to provide a conversion coated aluminum surface, the chromate conversion coating provided by a coating composition which comprises hexavalent chromium and a compound which includes fluorine, the conversion coating have a consistency of a gel;
- contacting a surface of the fluoropolymer structure with the conversion coated aluminum surface to provide a superposed fluoropolymer-conversion coated aluminum laminate, the fluoropolymer structure and conversion coated aluminum having thicknesses wherein the ratio of the thickness of the fluoropolymer structure to the conversion coated aluminum is in the range of from about 0.05 to about 20;
- and
- heating the superposed conversion coated fluoropolymer laminate to at least about 700.degree. F. for at least one minute to provide a fluoropolymer-aluminum laminate with a fluoropolymer/aluminum bond strength of at least about 8 pounds/inch of laminate.
1 more element
A method of bonding an aluminum foil to a fluoropolymer film, the foil having a thickness in the range of from about 1 mil to about 125 mils, the fluoropolymer film having the thickness in the range of from about 1 mil to about 125 mils, the method comprising:
- applying a chromate conversion coating to at least one surface of the aluminum foil with a conversion coating composition to provide a conversion coated aluminum foil, the conversion coating on the aluminum having a consistency of a gel and including fluoride ions;
- superposing the fluoropolymer film onto the conversion coated aluminum foil to contact the fluoropolymer with the conversion coating on the aluminum foil to provide a superposed conversion coated aluminum foil fluoropolymer laminate;
- and
- heating the superposed conversion coated aluminum foil fluoropolymer laminate to at least about 700.degree. F. for a time and at a pressure to effectively bond the fluoropolymer to the conversion coated aluminum foil to provide an aluminum foil fluoropolymer laminate.
1 more element
A method for bonding aluminum together, the method comprising:
- applying a chromate conversion coating to at least two aluminum surfaces, with a conversion coating composition, to provide conversion coated aluminum surfaces, said conversion coated surfaces having a consistency of a gel;
- superposing a fluoropolymer film having a thickness in the range of from about 1 to 10 mils between the conversion coated aluminum surfaces such that the fluoropolymer film is in about contact with both conversion coated aluminum surfaces to provide a superposed conversion coated aluminum/fluoropolymer aluminum laminate, the conversion coating including fluoride ion;
- and
- heating the superposed conversion coated aluminum/fluoropolymer laminate to at least about 700.degree. F. for a time sufficient to effectively bond the conversion coated aluminum surfaces to the fluoropolymer to provide a laminate having at least two aluminum surfaces bonded with the fluoropolymer film.
1 more element
Dependencies are inferred from the claim text.