Coating processes – Direct application of electrical – magnetic – wave – or... – Sonic or ultrasonic
Patent
1998-05-28
2000-11-21
Pianalto, Bernard
Coating processes
Direct application of electrical, magnetic, wave, or...
Sonic or ultrasonic
427128, 427131, 4284231, 428694BA, 428900, G11B 566
Patent
active
061499897
ABSTRACT:
The present invention discloses a magnetic recording particulate mediumhaving amagnetic layer on anonmagnetic support, the magnetic layer containing a ferromagnetic metal powder and a binder and having a coercive force of 1,400 to 1,700 Oe, wherein the ferromagnetic metal powder is spindle-shaped particles consisting essentially of Fe and having a Co/Fe ratio of from 1 to 5 atomic %, an Al/Fe ratio of from 5 to 15 atomic %, an average major axis length of 0.1 to 0.2 .mu.m and a specific surface area of 40 to 50 m.sup.2 /g, and the binder contains a polyurethane consisting essentially of a diol component comprising a polyether polyol and a polyester polyol and a polyisocyanate component. This magnetic recording particulate medium is characterized by minimal head wear, freedom from head clogging, and satisfactory electromagnetic characteristics.
REFERENCES:
patent: 4670337 (1987-06-01), Tokuoka et al.
patent: 5508117 (1996-04-01), Kawamata et al.
patent: 5578376 (1996-11-01), Hashimoto et al.
patent: 5718964 (1998-02-01), Naoe et al.
patent: 5750233 (1998-05-01), Ogawa et al.
Additional partial translation of JP 8-306031 (three pages) (no date avail.).
European Search Report (no date avail.).
Aoki Toshichika
Aonuma Masashi
Araki Hiroaki
Hashimoto Hiroshi
Katayama Kazutoshi
Fuji Photo Film Co. , Ltd.
Pianalto Bernard
LandOfFree
Magnetic recording particulate medium does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetic recording particulate medium, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic recording particulate medium will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1254583