Protective coating for machine-readable markings

Details Protective coating for machine-readable markings Protective coating for machine-readable markings

1993-09-30

1994-05-03

Ryan, Patrick J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428357, 428203, 428357, 428421, 428422, 428463, 427209, 427386, 528401, B32B 300, B32B 516, B32B 714

Patent

active

053086856

ABSTRACT:
A method of protecting machine-readable markings on the surfaces of articles consisting in applying to the machine-readable markings a thin layer of an amorphous fluoropolymer, which may be, i.a., a copolymer of perfluoro(1,3-dioxole) or of perfluoro(2,2-dimethyl-1,3-dioxole) with a fluoromonomer selected from a specifically recited group, especially, with tetrafluroethylene; or a cyclic aliphatic homopolymer in which the repeating unit contains an aliphatic ring of 5-9 members, at least two of the ring members being carbon atoms independently substituted either by fluorine atoms or by perfluoromethyl groups, at most two of the ring atoms being oxygen atoms, the remaining portions of the repeating units, when present, being pefluoromethylene groups.

REFERENCES:
patent: 3762940 (1973-10-01), Bechtold
patent: 4600630 (1986-07-01), Quinn et al.
patent: 4670295 (1987-06-01), Quinn et al.
patent: 4754009 (1988-06-01), Squire
patent: 5118579 (1992-06-01), Aharoni
patent: 5139879 (1992-08-01), Aharoni

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