公开(公告)号：JP2000057556A

公开(公告)日：2000-02-25

申请号：JP22206998

申请日：1998-08-05

Applicant: KAO CORP

Inventor： ONODERA OSAMU ,  MAKI KAZUO ,  YAMASHITA KAZUTAKA

IPC: C09D5/23 ,  G11B5/70 ,  G11B5/702 ,  G11B5/738 ,  G11B5/842

Abstract: PROBLEM TO BE SOLVED: To provide a magnetic recording medium having excellent electromagnetic transducing characteristic, which is high in output and reduced in the generation of dropout, and excellent in traveling stability and durability. SOLUTION: The magnetic recording medium has a lower layer and an upper layer magnetic layer having respectively =8000 nm by weight average, is used.

公开(公告)号：JPH05314464A

公开(公告)日：1993-11-26

申请号：JP11566292

申请日：1992-05-08

Applicant: KAO CORP

Inventor： NAKAYAMA HIDEHIKO ,  ONODERA OSAMU

IPC: G11B5/708 ,  C09D5/23 ,  C09D7/12 ,  C09D175/00 ,  C09D175/04 ,  G11B5/73 ,  G11B5/842

Abstract: PURPOSE:To maintain the running durability such as durability for still mode and continuous tape running under a wide range of temperature and humidity condition and also improve productivity and obtain an economical merit. CONSTITUTION:Polyisocyanate compound having an isocyanate ring is contained in a magnetic layer. This magnetic recording medium is manufactured by coating a non-magnetic bearing material with a magnetic paint and thereafter placing such medium under the environment that humiditity is 0.016 [vapor kg/dry air 1kg] for at least a day or longer.