JP2021047977A5 - - Google Patents

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Publication number
JP2021047977A5
JP2021047977A5 JP2020181396A JP2020181396A JP2021047977A5 JP 2021047977 A5 JP2021047977 A5 JP 2021047977A5 JP 2020181396 A JP2020181396 A JP 2020181396A JP 2020181396 A JP2020181396 A JP 2020181396A JP 2021047977 A5 JP2021047977 A5 JP 2021047977A5
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Japan
Prior art keywords
magnetic
recording medium
magnetic recording
medium according
magnetic layer
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JP2020181396A
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Japanese (ja)
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JP7358321B2 (en
JP2021047977A (en
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Priority claimed from JP2020122791A external-priority patent/JP6909907B2/en
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Priority to JP2020181396A priority Critical patent/JP7358321B2/en
Priority claimed from JP2020181396A external-priority patent/JP7358321B2/en
Publication of JP2021047977A publication Critical patent/JP2021047977A/en
Publication of JP2021047977A5 publication Critical patent/JP2021047977A5/ja
Priority to JP2023165482A priority patent/JP7473731B2/en
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Publication of JP7358321B2 publication Critical patent/JP7358321B2/en
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Claims (9)

非磁性支持体と強磁性粉末を含む磁性層とを有する磁気記録媒体であって、
前記非磁性支持体と前記磁性層との間に、非磁性粉末を含む非磁性層を有し、
前記非磁性層の厚みは、０．１０μｍ以上１．５０μｍ以下であり、
前記磁性層を７０ａｔｍの圧力で押圧した後の該磁性層の表面ゼータ電位の等電点が２．５以上３．８以下である磁気記録媒体。 A magnetic recording medium having a nonmagnetic support and a magnetic layer containing ferromagnetic powder,
having a non-magnetic layer containing non-magnetic powder between the non-magnetic support and the magnetic layer;
The non-magnetic layer has a thickness of 0.10 μm or more and 1.50 μm or less,
A magnetic recording medium, wherein the isoelectric point of the surface zeta potential of the magnetic layer after pressing the magnetic layer with a pressure of 70 atm is 2.5 or more and 3.8 or less. 前記非磁性層の厚みは、０．１０μｍ以上１．００μｍ以下である、請求項１に記載の磁気記録媒体。 2. The magnetic recording medium according to claim 1, wherein said non-magnetic layer has a thickness of 0.10 [mu]m or more and 1.00 [mu]m or less . 前記磁性層は、無機酸化物系粒子を含む、請求項１または２に記載の磁気記録媒体。 3. The magnetic recording medium according to claim 1, wherein said magnetic layer contains inorganic oxide particles. 前記無機酸化物系粒子は、無機酸化物とポリマーとの複合粒子である、請求項３に記載の磁気記録媒体。 4. The magnetic recording medium according to claim 3, wherein said inorganic oxide particles are composite particles of an inorganic oxide and a polymer. 前記磁性層は、酸性基を有する結合剤を含む、請求項１～４のいずれか１項に記載の磁気記録媒体。 5. The magnetic recording medium according to claim 1, wherein said magnetic layer contains a binder having an acidic group. 前記酸性基は、スルホン酸基およびその塩からなる群から選ばれる少なくとも一種の酸性基である、請求項５に記載の磁気記録媒体。 6. The magnetic recording medium according to claim 5, wherein said acidic group is at least one acidic group selected from the group consisting of sulfonic acid groups and salts thereof. 前記非磁性支持体の前記磁性層を有する表面側とは反対の表面側に、非磁性粉末を含むバックコート層を有する、請求項１～６のいずれか１項に記載の磁気記録媒体。 7. The magnetic recording medium according to any one of claims 1 to 6 , further comprising a backcoat layer containing a nonmagnetic powder on the surface of the nonmagnetic support opposite to the surface having the magnetic layer. 磁気テープである、請求項１～７のいずれか１項に記載の磁気記録媒体。 The magnetic recording medium according to any one of claims 1 to 7 , which is a magnetic tape. 請求項１～８のいずれか１項に記載の磁気記録媒体と、
磁気ヘッドと、
を含む磁気記録再生装置。 a magnetic recording medium according to any one of claims 1 to 8 ;
a magnetic head;
A magnetic recording and reproducing device including
JP2020181396A 2020-07-17 2020-10-29 Magnetic recording media and magnetic recording/reproducing devices Active JP7358321B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2020181396A JP7358321B2 (en) 2020-07-17 2020-10-29 Magnetic recording media and magnetic recording/reproducing devices
JP2023165482A JP7473731B2 (en) 2020-07-17 2023-09-27 Magnetic recording medium and magnetic recording/reproducing device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020122791A JP6909907B2 (en) 2019-09-17 2020-07-17 Magnetic recording medium and magnetic recording / playback device
JP2020181396A JP7358321B2 (en) 2020-07-17 2020-10-29 Magnetic recording media and magnetic recording/reproducing devices

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP2020122791A Division JP6909907B2 (en) 2019-09-17 2020-07-17 Magnetic recording medium and magnetic recording / playback device

Related Child Applications (1)

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JP2023165482A Division JP7473731B2 (en) 2020-07-17 2023-09-27 Magnetic recording medium and magnetic recording/reproducing device

Publications (3)

Publication Number Publication Date
JP2021047977A JP2021047977A (en) 2021-03-25
JP2021047977A5 true JP2021047977A5 (en) 2022-09-22
JP7358321B2 JP7358321B2 (en) 2023-10-10

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JP2020181396A Active JP7358321B2 (en) 2020-07-17 2020-10-29 Magnetic recording media and magnetic recording/reproducing devices
JP2023165482A Active JP7473731B2 (en) 2020-07-17 2023-09-27 Magnetic recording medium and magnetic recording/reproducing device

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JP2023165482A Active JP7473731B2 (en) 2020-07-17 2023-09-27 Magnetic recording medium and magnetic recording/reproducing device

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JP (2) JP7358321B2 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5530835B2 (en) 2010-07-02 2014-06-25 富士フイルム株式会社 Magnetic recording medium and method for manufacturing the same
JP5204249B2 (en) 2011-01-27 2013-06-05 富士フイルム株式会社 Magnetic tape
JP6691513B2 (en) 2017-06-23 2020-04-28 富士フイルム株式会社 Magnetic tape
JP6691512B2 (en) 2017-06-23 2020-04-28 富士フイルム株式会社 Magnetic recording medium
JP6691511B2 (en) 2017-06-23 2020-04-28 富士フイルム株式会社 Magnetic recording medium
JP6691514B2 (en) 2017-06-23 2020-04-28 富士フイルム株式会社 Magnetic tape

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