Composite-coated flat-rolled steel can stock and can product

Details Composite-coated flat-rolled steel can stock and can product Composite-coated flat-rolled steel can stock and can product

1986-04-25

1989-03-14

Page, Thurman K.

Stock material or miscellaneous articles

Composite

Of metal

220 1R, 220 62, 220415, 220454, 220461, 148264, 427402, 4274071, 427409, 427410, 204 387, B32B 900, B65D 2500, B05D 136, C23C 2224

Patent

active

048123650

ABSTRACT:
Composite-coated flat-rolled steel can stock processing and product for fabrication of drawn one-piece cup-shaped work product or can end walls. Single or double-reduced flat-rolled steel, after cleaning, is chemically treated to apply a chrome oxide coating of about three hundred (300) to five hundred (500) micrograms per square foot to each substrate surface followed by utilization of a dual-organic coating system with application and curing of an organic primer to each chemically-treated surface of the substrate followed by application and curing of an added organic coating on at least one such substrate surface; such composite-coating process resulting in an exterior surface of a drawn can body or end wall having at least about two and one-half (2.5) to about five (5) milligrams of organic coating per square inch and an interior can surface with organic coating weight of at least about seven and one-half (7.5) to ten (10) milligrams per square inch. In cup forming applications, both such surfaces are lubricated with a suitable lubricant approved for food and beverage usage prior to cupping and any redraw operation.

REFERENCES:
patent: 3666568 (1972-05-01), Shimanaka et al.
patent: 3671331 (1972-06-01), Malkin et al.
patent: 4032678 (1977-06-01), Perfetti et al.
patent: 4548868 (1985-10-01), Yonezawa et al.

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