Coating processes – Magnetic base or coating – Magnetic coating
Patent
1994-05-26
1995-07-18
Pianalto, Bernard
Coating processes
Magnetic base or coating
Magnetic coating
427131, H01F 1002
Patent
active
054339731
ABSTRACT:
A method of depositing a magnetic recording media coating onto a substrate, wherein the coating is substantially free of Benard Cells, the method comprising the steps of: (a) providing a dispersion comprising a polymeric binder, a pigment, and a solvent; (b) coating the dispersion onto a surface of the substrate; (c) drying the dispersion; (d) calculating values comprising .mu., .beta., and d representing the viscosity, temperature gradient, and wet caliper of the dispersion, respectively; and (e) during the course of carrying out steps (a), (b), and (c), maintaining the ratio ##EQU1## below a threshold value sufficient to substantially prevent the formation of Benard Cells in the magnetic recording media coating.
REFERENCES:
patent: 4851289 (1989-07-01), Ogawa et al.
patent: 4863793 (1989-09-01), Ogawa et al.
patent: 5000997 (1991-03-01), Ritchie et al.
patent: 5114778 (1992-05-01), Yanai et al.
patent: 5162183 (1992-11-01), Lindblad et al.
"Cellular Convection in Polymer Coatings-an Assessment," by C. M. Hansen and P. E. Pierce, Ind. Eng. Chem. Prod. Res. Develop., vol. 12, No. 1, 1973, pp. 67-70; (no month available).
"Surface Deformation of Thin Coatings Caused by Evaporative Convection," (I), by J. N. Anand and R. Z. Balwinski, Journal of Colloid and Interface Science, vol. 31, No. 2, Oct. 1969, pp. 196-202.
"Surface Deformation of Thin Coatings Caused by Evaporative Convection," (II), by J. N. Anand, Journal of Colloid and Interface Science, vol. 31, No. 2, Oct. 1969, pp. 203-207.
"Surface Deformation of Thin Coatings Caused By Evaporative Convection," (III) by J. N. Anand and H. J. Karam, Journal of Colloid and Interface Science, vol. 31, No. 2, Oct. 1969, pp. 208-215.
"Interfacial Hydrodynamics: An Overview," by John Berg, Canadian Metallurgical Quarterly, vol. 21, No. 2, 1982 pp. 121-136.
"Flotation in Paints-A Suggested Mechanism," by I. Ferguson, Journal of The Oil & Colour Chemists' Association, vol. 42, No. 8, pp. 529-542, Aug. 1959.
Lundberg David J.
Wallack David A.
Yapel Robert A.
Griswold Gary L.
Kagan David B.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Pianalto Bernard
LandOfFree
Method of coating a magnetic recording media coating onto a subs does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of coating a magnetic recording media coating onto a subs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of coating a magnetic recording media coating onto a subs will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2418437