公开(公告)号：US4009111A

公开(公告)日：1977-02-22

申请号：US624017

申请日：1975-10-20

申请人： Yasuo Tamai ,  Masashi Aonuma ,  Matsuaki Nakamura ,  Hiroshi Agawa ,  Goro Akashi

发明人： Yasuo Tamai ,  Masashi Aonuma ,  Matsuaki Nakamura ,  Hiroshi Agawa ,  Goro Akashi

IPC分类号： B22F9/24 ,  C22C33/02 ,  G11B5/706 ,  B22F3/00 ,  C22C1/04 ,  H01F1/02

CPC分类号： G11B5/70621 ,  B22F9/24 ,  C22C33/0285 ,  G11B5/70615

摘要： A magnetic recording medium for high density recording comprising a support having thereon a magnetic recording layer comprising a ferromagnetic metal powder of the Fe-Co-Cr-B system and having a coercive force of about 700 to 1500 orsteds in the oriented direction of the magnetic substance and a residual magnetic flux density of about 1500 gauses or more, the residual magnetic flux density of which after storage for 160 hours under the conditions of a temperature of 60.degree. C and 90%RH is 85% or more of the initial value thereof before storage under these conditions in a binder. The magnetic recording medium is especially suitable for high density recording, having sufficient sensitivity and excellent resistance.

摘要翻译： 一种用于高密度记录的磁记录介质，包括其上具有磁记录层的载体，所述磁记录层包含Fe-Co-Cr-B系统的铁磁性金属粉末，并且在磁性方向上具有约700至1500埃的矫顽力 物质和剩余磁通密度约为1500高斯或以上，在60℃，90％RH的温度条件下保存160小时后的剩余磁通密度为初始值的85％以上 在这些条件下在粘合剂中储存之前。 磁记录介质特别适用于高密度记录，具有足够的灵敏度和优异的电阻。

公开(公告)号：US3943012A

公开(公告)日：1976-03-09

申请号：US498337

申请日：1974-08-19

申请人： Yasuo Tamai ,  Masashi Aonuma ,  Matsuaki Nakamura ,  Hiroshi Agawa ,  Goro Akashi

发明人： Yasuo Tamai ,  Masashi Aonuma ,  Matsuaki Nakamura ,  Hiroshi Agawa ,  Goro Akashi

IPC分类号： C09D5/23 ,  C09D7/12 ,  G11B5/706 ,  H01F1/047 ,  H01F1/02

CPC分类号： G11B5/70615 ,  G11B5/70621

摘要： A magnetic recording medium for high density recording comprising a support having thereon a magnetic recording layer comprising a ferromagnetic metal powder of the Fe-Co-Cr-B system and having a coercive force of about 700 to 500 oersteds in the oriented direction of the magnetic substance and a residual magnetic flux density of about 1500 gausses or more, the residual magnetic flux density of which after storage for 160 hours under the conditions of a temperature of 60.degree.C and 90%RH is 85% or more of the initial value thereof before storage under these conditions in a binder. The magnetic recording medium is especially suitable for high density recording, having sufficient sensitivity and excellent resistance.

摘要翻译： 一种用于高密度记录的磁记录介质，包括其上具有包含Fe-Co-Cr-B系统的铁磁金属粉末的磁记录层的支撑体，并且在磁性方向上具有约700至500奥斯特的矫顽力 物质和约1500高斯或更高的剩余磁通密度，其在60℃和90％RH的温度条件下储存160小时后的剩余磁通密度为其初始值的85％或更多 在这些条件下在粘合剂中储存之前。 磁记录介质特别适用于高密度记录，具有足够的灵敏度和优异的电阻。