JP2021034100A5 - - Google Patents
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- JP2021034100A5 JP2021034100A5 JP2019227421A JP2019227421A JP2021034100A5 JP 2021034100 A5 JP2021034100 A5 JP 2021034100A5 JP 2019227421 A JP2019227421 A JP 2019227421A JP 2019227421 A JP2019227421 A JP 2019227421A JP 2021034100 A5 JP2021034100 A5 JP 2021034100A5
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- Prior art keywords
- recording medium
- magnetic recording
- magnetic
- less
- layer
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- 239000000314 lubricant Substances 0.000 claims 26
- 239000006247 magnetic powder Substances 0.000 claims 20
- 239000000758 substrate Substances 0.000 claims 18
- 238000004804 winding Methods 0.000 claims 8
- 239000002245 particle Substances 0.000 claims 6
- 229920000728 polyester Polymers 0.000 claims 6
- 239000011148 porous material Substances 0.000 claims 6
- 229910000529 magnetic ferrite Inorganic materials 0.000 claims 4
- 125000000896 monocarboxylic acid group Chemical group 0.000 claims 4
- 229910000859 α-Fe Inorganic materials 0.000 claims 4
- 238000001035 drying Methods 0.000 claims 3
- 229910052788 barium Inorganic materials 0.000 claims 2
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium(0) Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims 2
- 229910052803 cobalt Inorganic materials 0.000 claims 2
- 239000010941 cobalt Substances 0.000 claims 2
- 150000001875 compounds Chemical class 0.000 claims 2
- 229910000704 hexaferrum Inorganic materials 0.000 claims 2
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims 2
- 229910052712 strontium Inorganic materials 0.000 claims 2
Claims (54)
基体と、
前記基体上に設けられた下地層と、
前記下地層上に設けられた磁性層と
を有し、
前記基体は、ポリエステルを主たる成分として含み、
前記下地層の平均厚みは０．９μｍ以下であり、
前記磁気記録媒体は、潤滑剤を含み、
前記磁性層は、多数の孔部が設けられた表面を有し、前記表面の算術平均粗さＲａは、２．５ｎｍ以下であり、
前記潤滑剤を除去および乾燥した状態における前記磁気記録媒体の全体のＢＥＴ比表面積は、３．５ｍ2／ｇ以上であり、
前記磁気記録媒体の垂直方向における角形比は、６５％以上であり、
前記磁性層の平均厚みは、９０ｎｍ以下であり、
前記磁気記録媒体の平均厚みは、５．２μｍ以下である
磁気記録媒体。 A tape-shaped magnetic recording medium
With the base
The base layer provided on the substrate and
It has a magnetic layer provided on the base layer and has.
The substrate contains polyester as a main component.
The average thickness of the base layer is 0.9 μm or less.
The magnetic recording medium contains a lubricant and contains
The magnetic layer has a surface provided with a large number of holes, and the arithmetic average roughness Ra of the surface is 2.5 nm or less.
The total BET specific surface area of the magnetic recording medium in the state where the lubricant is removed and dried is 3.5 m 2 / g or more.
The square ratio of the magnetic recording medium in the vertical direction is 65% or more.
The average thickness of the magnetic layer is 90 nm or less.
A magnetic recording medium having an average thickness of 5.2 μm or less.
請求項１記載の磁気記録媒体。 The magnetic recording medium according to claim 1, wherein the magnetic recording medium has a Young's modulus of 7.78 GPa or less.
請求項１記載の磁気記録媒体。 The magnetic recording medium according to claim 1, wherein the average thickness of the substrate is 4.2 μm or less.
前記バック層の平均厚みは、０．３μｍ以上０．５μｍ以下である
請求項１記載の磁気記録媒体。 The substrate further has a back layer provided on the opposite side of the substrate layer.
The magnetic recording medium according to claim 1, wherein the average thickness of the back layer is 0.3 μm or more and 0.5 μm or less.
請求項１記載の磁気記録媒体。 The magnetic recording medium according to claim 1, wherein the base layer has an average thickness of 0.5 μm or more.
請求項１に記載の磁気記録媒体。 The magnetic recording medium according to claim 1, wherein the average pore diameter of the entire magnetic recording medium determined by the BJH method is 6 nm or more and 12 nm or less.
請求項１に記載の磁気記録媒体。 The coefficient of dynamic friction μA between the surface and the magnetic head when the tension applied to the magnetic recording medium is 0.4 N, and the surface and the magnetic head when the tension applied to the magnetic recording medium is 1.2 N. The magnetic recording medium according to claim 1, wherein the coefficient of friction ratio μB / μA with the coefficient of dynamic friction μB is 1.0 or more and 1.8 or less.
請求項１に記載の磁気記録媒体。 When the tension applied to the magnetic recording medium is 0.6N, the dynamic friction coefficient μC (5) between the surface and the magnetic head for the fifth time from the start of traveling of the magnetic recording medium and the magnetic recording medium are applied. When the tension is 0.6N, the friction coefficient ratio μC (1000) / μC (5) of the dynamic friction coefficient μC (1000) between the surface and the magnetic head 1000 times from the start of traveling of the magnetic recording medium. The magnetic recording medium according to claim 1, wherein) is 1.2 or more and 1.8 or less.
前記磁性粉の平均アスペクト比は、１．１以上３．０以下である
請求項１に記載の磁気記録媒体。 The magnetic layer contains magnetic powder and contains
The magnetic recording medium according to claim 1, wherein the magnetic powder has an average aspect ratio of 1.1 or more and 3.0 or less.
前記磁性粉は、Ｂａ（バリウム）およびＳｒ（ストロンチウム）のうちの少なくとも１種を含有する六方晶フェライト、ε酸化鉄またはＣｏ（コバルト）含有スピネル型フェライトを含む
請求項１に記載の磁気記録媒体。 The magnetic layer contains magnetic powder and contains
The magnetic recording medium according to claim 1, wherein the magnetic powder contains hexagonal ferrite containing at least one of Ba (barium) and Sr (strontium), ε-iron oxide or Co (cobalt) -containing spinel-type ferrite. ..
前記磁性粉の平均粒子サイズは、２５ｎｍ以下である
請求項１に記載の磁気記録媒体。 The magnetic layer contains magnetic powder and contains
The magnetic recording medium according to claim 1, wherein the average particle size of the magnetic powder is 25 nm or less.
請求項１に記載の磁気記録媒体。
ＣＨ3（ＣＨ2）nＣＯＯＨ …＜１＞
（但し、前記一般式＜１＞において、ｎは１４以上２２以下の範囲から選ばれる整数である。）
ＣＨ3（ＣＨ2）pＣＯＯ（ＣＨ2）qＣＨ3…＜２＞
（但し、前記一般式＜２＞において、ｐは１４以上２２以下の範囲から選ばれる整数であり、ｑは２以上５以下の範囲から選ばれる整数である。）
ＣＨ3（ＣＨ2）nＣＨ＝ＣＨ（ＣＨ2）mＣＯＯＨ …＜３＞
（但し、前記一般式＜３＞において、ｎ＋ｍは１２以上２０以下の範囲から選ばれる整数である。）
ＣＨ3（ＣＨ2）pＣＯＯ−（ＣＨ2）qＣＨ（ＣＨ3）2…＜４＞
（但し、前記一般式＜４＞において、ｐは１４以上２２以下の範囲から選ばれる整数であり、ｑは１以上３以下の範囲から選ばれる整数である。） The magnetic recording medium according to claim 1, wherein the lubricant contains at least one of the compounds represented by the following general formulas <1> to <4>.
CH 3 (CH 2 ) n COOH… <1>
(However, in the general formula <1>, n is an integer selected from the range of 14 or more and 22 or less.)
CH 3 (CH 2 ) p COO (CH 2 ) q CH 3 … <2>
(However, in the general formula <2>, p is an integer selected from the range of 14 or more and 22 or less, and q is an integer selected from the range of 2 or more and 5 or less.)
CH 3 (CH 2 ) n CH = CH (CH 2 ) m COOH… <3>
(However, in the general formula <3>, n + m is an integer selected from the range of 12 or more and 20 or less.)
CH 3 (CH 2 ) p COO- (CH 2 ) q CH (CH 3 ) 2 … <4>
(However, in the general formula <4>, p is an integer selected from the range of 14 or more and 22 or less, and q is an integer selected from the range of 1 or more and 3 or less.)
前記磁性層の孔部と前記下地層の孔部とがつながっている
請求項１に記載の磁気記録媒体。 The base layer has a large number of holes and has a large number of holes.
The magnetic recording medium according to claim 1, wherein the pores of the magnetic layer and the pores of the base layer are connected.
請求項１に記載の磁気記録媒体。 The magnetic recording medium according to claim 1, wherein the arithmetic average roughness Ra of the surface of the magnetic layer is 0.8 nm or more.
請求項１に記載の磁気記録媒体。 The magnetic recording medium according to claim 1, wherein the total BET specific surface area of the magnetic recording medium in a state where the lubricant is removed and dried is 4.0 m 2 / g or more.
請求項１に記載の磁気記録媒体。 The magnetic recording medium according to claim 1, wherein the total BET specific surface area of the magnetic recording medium in a state where the lubricant is removed and dried is 4.5 m 2 / g or more.
請求項１に記載の磁気記録媒体。 The magnetic recording medium according to claim 1, wherein the total BET specific surface area of the magnetic recording medium in a state where the lubricant is removed and dried is 5.0 m 2 / g or more.
請求項１に記載の磁気記録媒体。 The magnetic recording medium according to claim 1, wherein the total BET specific surface area of the magnetic recording medium in a state where the lubricant is removed and dried is 7.0 m 2 / g or less.
請求項１に記載の磁気記録媒体。 The magnetic recording medium according to claim 1, wherein the total BET specific surface area of the magnetic recording medium in a state where the lubricant is removed and dried is 6.0 m 2 / g or less.
請求項１に記載の磁気記録媒体。 The magnetic recording medium according to claim 1, wherein the total BET specific surface area of the magnetic recording medium in a state where the lubricant is removed and dried is 5.5 m 2 / g or less.
前記磁性粉の平均粒子体積は１９５０ｎｍThe average particle volume of the magnetic powder is 1950 nm. 33 以下であるIs below
請求項１に記載の磁気記録媒体。The magnetic recording medium according to claim 1.
前記磁性粉の平均粒子体積は１６００ｎｍThe average particle volume of the magnetic powder is 1600 nm. 33 以下であるIs below
請求項１に記載の磁気記録媒体。The magnetic recording medium according to claim 1.
請求項１に記載の磁気記録媒体。The magnetic recording medium according to claim 1.
請求項１に記載の磁気記録媒体。The magnetic recording medium according to claim 1.
前記送り出し部から送り出された前記磁気記録媒体を巻き取ることのできる巻き取り部と、
前記送り出し部から前記巻き取り部へ向けて走行する前記磁気記録媒体と接触しつつ、前記磁気記録媒体への情報書き込み、および前記磁気記録媒体からの情報読み出しを行うことのできる磁気ヘッドと
を備え、
前記磁気記録媒体は、
基体と、
前記基体上に設けられた下地層と、
前記下地層上に設けられた磁性層と
を有し、
前記基体は、ポリエステルを主たる成分として含み、
前記下地層の平均厚みは０．９μｍ以下であり、
前記磁気記録媒体は、潤滑剤を含み、
前記磁性層は、多数の孔部が設けられた表面を有し、前記表面の算術平均粗さＲａは、２．５ｎｍ以下であり、
前記潤滑剤を除去および乾燥した状態における前記磁気記録媒体の全体のＢＥＴ比表面積は、３．５ｍ2／ｇ以上であり、
前記磁気記録媒体の垂直方向における角形比は、６５％以上であり、
前記磁性層の平均厚みは、９０ｎｍ以下であり、
前記磁気記録媒体の平均厚みは、５．２μｍ以下である
磁気記録再生装置。 A delivery unit that can sequentially send out tape-shaped magnetic recording media,
A winding unit capable of winding the magnetic recording medium sent out from the sending unit, and a winding unit.
It is provided with a magnetic head capable of writing information to the magnetic recording medium and reading information from the magnetic recording medium while contacting the magnetic recording medium traveling from the sending portion to the winding portion. ,
The magnetic recording medium is
With the base
The base layer provided on the substrate and
It has a magnetic layer provided on the base layer and has.
The substrate contains polyester as a main component.
The average thickness of the base layer is 0.9 μm or less.
The magnetic recording medium contains a lubricant and contains
The magnetic layer has a surface provided with a large number of holes, and the arithmetic average roughness Ra of the surface is 2.5 nm or less.
The total BET specific surface area of the magnetic recording medium in the state where the lubricant is removed and dried is 3.5 m 2 / g or more.
The square ratio of the magnetic recording medium in the vertical direction is 65% or more.
The average thickness of the magnetic layer is 90 nm or less.
A magnetic recording / reproducing device having an average thickness of 5.2 μm or less of the magnetic recording medium.
請求項２５に記載の磁気記録再生装置。 The magnetic recording / reproducing device according to claim 25 , which has a configuration in which the tension applied in the longitudinal direction of the magnetic recording medium can be adjusted.
前記磁気記録媒体を収容する筐体と
を備え、
前記磁気記録媒体は、
基体と、
前記基体上に設けられた下地層と、
前記下地層上に設けられた磁性層と
を有し、
前記基体は、ポリエステルを主たる成分として含み、
前記下地層の平均厚みは０．９μｍ以下であり、
前記磁気記録媒体は、潤滑剤を含み、
前記磁性層は、多数の孔部が設けられた表面を有し、前記表面の算術平均粗さＲａは、２．５ｎｍ以下であり、
前記潤滑剤を除去および乾燥した状態における前記磁気記録媒体の全体のＢＥＴ比表面積は、３．５ｍ2／ｇ以上であり、
前記磁気記録媒体の垂直方向における角形比は、６５％以上であり、
前記磁性層の平均厚みは、９０ｎｍ以下であり、
前記磁気記録媒体の平均厚みは、５．２μｍ以下である
磁気記録媒体カートリッジ。 With a tape-shaped magnetic recording medium
A housing for accommodating the magnetic recording medium is provided.
The magnetic recording medium is
With the base
The base layer provided on the substrate and
It has a magnetic layer provided on the base layer and has.
The substrate contains polyester as a main component.
The average thickness of the base layer is 0.9 μm or less.
The magnetic recording medium contains a lubricant and contains
The magnetic layer has a surface provided with a large number of holes, and the arithmetic average roughness Ra of the surface is 2.5 nm or less.
The total BET specific surface area of the magnetic recording medium in the state where the lubricant is removed and dried is 3.5 m 2 / g or more.
The square ratio of the magnetic recording medium in the vertical direction is 65% or more.
The average thickness of the magnetic layer is 90 nm or less.
A magnetic recording medium cartridge having an average thickness of 5.2 μm or less.
基体と、
前記基体上に設けられた下地層と、
前記下地層上に設けられた磁性層と
を有し、
前記基体は、ポリエステルを主たる成分として含み、
前記下地層の平均厚みは０．９μｍ以下であり、
前記磁気記録媒体は、潤滑剤を含み、
前記磁性層は、多数の孔部が設けられた表面を有し、前記表面の算術平均粗さＲａは、２．５ｎｍ以下であり、
前記潤滑剤を除去および乾燥した状態における前記磁気記録媒体の全体のＢＥＴ比表面積は、３．５ｍ2／ｇ以上であり、
前記磁性層の平均厚みは、９０ｎｍ以下であり、
前記磁気記録媒体の平均厚みは、５．２μｍ以下である
磁気記録媒体。 A tape-shaped magnetic recording medium
With the base
The base layer provided on the substrate and
It has a magnetic layer provided on the base layer and has.
The substrate contains polyester as a main component.
The average thickness of the base layer is 0.9 μm or less.
The magnetic recording medium contains a lubricant and contains
The magnetic layer has a surface provided with a large number of holes, and the arithmetic average roughness Ra of the surface is 2.5 nm or less.
Overall BET specific surface area of the magnetic recording medium in a state of being removed and drying the lubricant state, and are 3.5 m 2 / g or more,
The average thickness of the previous Symbol magnetic layer is 90nm or less,
A magnetic recording medium having an average thickness of 5.2 μm or less.
請求項２８記載の磁気記録媒体。 28. The magnetic recording medium according to claim 28 , wherein the magnetic recording medium has a Young's modulus of 7.78 GPa or less.
請求項２８記載の磁気記録媒体。 The magnetic recording medium according to claim 28 , wherein the average thickness of the substrate is 4.2 μm or less.
前記バック層の平均厚みは、０．３μｍ以上０．５μｍ以下である
請求項２８記載の磁気記録媒体。 The substrate further has a back layer provided on the opposite side of the substrate layer.
28. The magnetic recording medium according to claim 28 , wherein the average thickness of the back layer is 0.3 μm or more and 0.5 μm or less.
請求項２８記載の磁気記録媒体。 The magnetic recording medium according to claim 28 , wherein the base layer has an average thickness of 0.5 μm or more.
請求項２８に記載の磁気記録媒体。 The magnetic recording medium according to claim 28 , wherein the overall average pore diameter of the magnetic recording medium determined by the BJH method is 6 nm or more and 12 nm or less.
請求項２８に記載の磁気記録媒体。 The coefficient of dynamic friction μA between the surface and the magnetic head when the tension applied to the magnetic recording medium is 0.4 N, and the surface and the magnetic head when the tension applied to the magnetic recording medium is 1.2 N. The magnetic recording medium according to claim 28 , wherein the coefficient of friction ratio μB / μA with the coefficient of dynamic friction μB is 1.0 or more and 1.8 or less.
請求項２８に記載の磁気記録媒体。 When the tension applied to the magnetic recording medium is 0.6N, the dynamic friction coefficient μC (5) between the surface and the magnetic head for the fifth time from the start of traveling of the magnetic recording medium and the magnetic recording medium are applied. When the tension is 0.6N, the friction coefficient ratio μC (1000) / μC (5) of the dynamic friction coefficient μC (1000) between the surface and the magnetic head 1000 times from the start of traveling of the magnetic recording medium. ) Is 1.2 or more and 1.8 or less, according to claim 28 .
前記磁性粉の平均アスペクト比は、１．１以上３．０以下である
請求項２８に記載の磁気記録媒体。 The magnetic layer contains magnetic powder and contains
The magnetic recording medium according to claim 28 , wherein the magnetic powder has an average aspect ratio of 1.1 or more and 3.0 or less.
前記磁性粉は、Ｂａ（バリウム）およびＳｒ（ストロンチウム）のうちの少なくとも１種を含有する六方晶フェライト、ε酸化鉄またはＣｏ（コバルト）含有スピネル型フェライトを含む
請求項２８に記載の磁気記録媒体。 The magnetic layer contains magnetic powder and contains
28. The magnetic recording medium according to claim 28 , wherein the magnetic powder contains hexagonal ferrite containing at least one of Ba (barium) and Sr (strontium), ε-iron oxide or Co (cobalt) -containing spinel-type ferrite. ..
前記磁性粉の平均粒子サイズは、２５ｎｍ以下である
請求項２８に記載の磁気記録媒体。 The magnetic layer contains magnetic powder and contains
The magnetic recording medium according to claim 28 , wherein the average particle size of the magnetic powder is 25 nm or less.
請求項２８に記載の磁気記録媒体。
ＣＨ3（ＣＨ2）nＣＯＯＨ …＜１＞
（但し、前記一般式＜１＞において、ｎは１４以上２２以下の範囲から選ばれる整数である。）
ＣＨ3（ＣＨ2）pＣＯＯ（ＣＨ2）qＣＨ3…＜２＞
（但し、前記一般式＜２＞において、ｐは１４以上２２以下の範囲から選ばれる整数であり、ｑは２以上５以下の範囲から選ばれる整数である。）
ＣＨ3（ＣＨ2）nＣＨ＝ＣＨ（ＣＨ2）mＣＯＯＨ …＜３＞
（但し、前記一般式＜３＞において、ｎ＋ｍは１２以上２０以下の範囲から選ばれる整数である。）
ＣＨ3（ＣＨ2）pＣＯＯ−（ＣＨ2）qＣＨ（ＣＨ3）2…＜４＞
（但し、前記一般式＜４＞において、ｐは１４以上２２以下の範囲から選ばれる整数であり、ｑは１以上３以下の範囲から選ばれる整数である。） The magnetic recording medium according to claim 28 , wherein the lubricant contains at least one of the compounds represented by the following general formulas <1> to <4>.
CH 3 (CH 2 ) n COOH… <1>
(However, in the general formula <1>, n is an integer selected from the range of 14 or more and 22 or less.)
CH 3 (CH 2 ) p COO (CH 2 ) q CH 3 … <2>
(However, in the general formula <2>, p is an integer selected from the range of 14 or more and 22 or less, and q is an integer selected from the range of 2 or more and 5 or less.)
CH 3 (CH 2 ) n CH = CH (CH 2 ) m COOH… <3>
(However, in the general formula <3>, n + m is an integer selected from the range of 12 or more and 20 or less.)
CH 3 (CH 2 ) p COO- (CH 2 ) q CH (CH 3 ) 2 … <4>
(However, in the general formula <4>, p is an integer selected from the range of 14 or more and 22 or less, and q is an integer selected from the range of 1 or more and 3 or less.)
前記磁性層の孔部と前記下地層の孔部とがつながっている
請求項２８に記載の磁気記録媒体。 The base layer has a large number of holes and has a large number of holes.
28. The magnetic recording medium according to claim 28 , wherein the pores of the magnetic layer and the pores of the base layer are connected.
請求項２８に記載の磁気記録媒体。 The magnetic recording medium according to claim 28 , wherein the arithmetic average roughness Ra of the surface of the magnetic layer is 0.8 nm or more.
請求項２８に記載の磁気記録媒体。 The magnetic recording medium according to claim 28 , wherein the total BET specific surface area of the magnetic recording medium in a state where the lubricant is removed and dried is 4.0 m 2 / g or more.
請求項２８に記載の磁気記録媒体。 The magnetic recording medium according to claim 28 , wherein the total BET specific surface area of the magnetic recording medium in a state where the lubricant is removed and dried is 4.5 m 2 / g or more.
請求項２８に記載の磁気記録媒体。 The magnetic recording medium according to claim 28 , wherein the total BET specific surface area of the magnetic recording medium in a state where the lubricant is removed and dried is 5.0 m 2 / g or more.
請求項１に記載の磁気記録媒体。 The magnetic recording medium according to claim 1, wherein the total BET specific surface area of the magnetic recording medium in a state where the lubricant is removed and dried is 7.0 m 2 / g or less.
請求項２８に記載の磁気記録媒体。 The magnetic recording medium according to claim 28 , wherein the total BET specific surface area of the magnetic recording medium in a state where the lubricant is removed and dried is 6.0 m 2 / g or less.
請求項２８に記載の磁気記録媒体。 The magnetic recording medium according to claim 28 , wherein the total BET specific surface area of the magnetic recording medium in a state where the lubricant is removed and dried is 5.5 m 2 / g or less.
前記磁性粉の平均粒子体積は１９５０ｎｍThe average particle volume of the magnetic powder is 1950 nm. 33 以下であるIs below
請求項２８に記載の磁気記録媒体。28. The magnetic recording medium according to claim 28.
前記磁性粉の平均粒子体積は１６００ｎｍThe average particle volume of the magnetic powder is 1600 nm. 33 以下であるIs below
請求項２８に記載の磁気記録媒体。28. The magnetic recording medium according to claim 28.
請求項２８に記載の磁気記録媒体。28. The magnetic recording medium according to claim 28.
請求項２８に記載の磁気記録媒体。28. The magnetic recording medium according to claim 28.
前記送り出し部から送り出された前記磁気記録媒体を巻き取ることのできる巻き取り部と、
前記送り出し部から前記巻き取り部へ向けて走行する前記磁気記録媒体と接触しつつ、前記磁気記録媒体への情報書き込み、および前記磁気記録媒体からの情報読み出しを行うことのできる磁気ヘッドと
を備え、
前記磁気記録媒体は、
基体と、
前記基体上に設けられた下地層と、
前記下地層上に設けられた磁性層と
を有し、
前記基体は、ポリエステルを主たる成分として含み、
前記下地層の平均厚みは０．９μｍ以下であり、
前記磁気記録媒体は、潤滑剤を含み、
前記磁性層は、多数の孔部が設けられた表面を有し、前記表面の算術平均粗さＲａは、２．５ｎｍ以下であり、
前記潤滑剤を除去および乾燥した状態における前記磁気記録媒体の全体のＢＥＴ比表面積は、３．５ｍ2／ｇ以上であり、
前記磁性層の平均厚みは、９０ｎｍ以下であり、
前記磁気記録媒体の平均厚みは、５．２μｍ以下である
磁気記録再生装置。 A delivery unit that can sequentially send out tape-shaped magnetic recording media,
A winding unit capable of winding the magnetic recording medium sent out from the sending unit, and a winding unit.
It is provided with a magnetic head capable of writing information to the magnetic recording medium and reading information from the magnetic recording medium while contacting the magnetic recording medium traveling from the sending portion to the winding portion. ,
The magnetic recording medium is
With the base
The base layer provided on the substrate and
It has a magnetic layer provided on the base layer and has.
The substrate contains polyester as a main component.
The average thickness of the base layer is 0.9 μm or less.
The magnetic recording medium contains a lubricant and contains
The magnetic layer has a surface provided with a large number of holes, and the arithmetic average roughness Ra of the surface is 2.5 nm or less.
Overall BET specific surface area of the magnetic recording medium in a state of being removed and drying the lubricant state, and are 3.5 m 2 / g or more,
The average thickness of the previous Symbol magnetic layer is 90nm or less,
A magnetic recording / reproducing device having an average thickness of 5.2 μm or less of the magnetic recording medium.
請求項５２に記載の磁気記録再生装置。 The magnetic recording / reproducing device according to claim 52 , which has a configuration in which the tension applied in the longitudinal direction of the magnetic recording medium can be adjusted.
前記磁気記録媒体を収容する筐体と
を備え、
前記磁気記録媒体は、
基体と、
前記基体上に設けられた下地層と、
前記下地層上に設けられた磁性層と
を有し、
前記基体は、ポリエステルを主たる成分として含み、
前記下地層の平均厚みは０．９μｍ以下であり、
前記磁気記録媒体は、潤滑剤を含み、
前記磁性層は、多数の孔部が設けられた表面を有し、前記表面の算術平均粗さＲａは、２．５ｎｍ以下であり、
前記潤滑剤を除去および乾燥した状態における前記磁気記録媒体の全体のＢＥＴ比表面積は、３．５ｍ2／ｇ以上であり、
前記磁性層の平均厚みは、９０ｎｍ以下であり、
前記磁気記録媒体の平均厚みは、５．２μｍ以下である
磁気記録媒体カートリッジ。 With a tape-shaped magnetic recording medium
A housing for accommodating the magnetic recording medium is provided.
The magnetic recording medium is
With the base
The base layer provided on the substrate and
It has a magnetic layer provided on the base layer and has.
The substrate contains polyester as a main component.
The average thickness of the base layer is 0.9 μm or less.
The magnetic recording medium contains a lubricant and contains
The magnetic layer has a surface provided with a large number of holes, and the arithmetic average roughness Ra of the surface is 2.5 nm or less.
Overall BET specific surface area of the magnetic recording medium in a state of being removed and drying the lubricant state, and are 3.5 m 2 / g or more,
The average thickness of the previous Symbol magnetic layer is 90nm or less,
A magnetic recording medium cartridge having an average thickness of 5.2 μm or less.
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| JP2019227421A JP6863444B2 (en) | 2019-12-17 | 2019-12-17 | Magnetic recording medium, magnetic recording / playback device and magnetic recording medium cartridge |
| JP2021045279A JP6962482B2 (en) | 2019-12-17 | 2021-03-18 | Magnetic recording medium, magnetic recording / playback device and magnetic recording medium cartridge |
| JP2021152159A JP7063411B2 (en) | 2019-12-17 | 2021-09-17 | Magnetic recording medium, magnetic recording / playback device and magnetic recording medium cartridge |
| JP2022069688A JP7388470B2 (en) | 2019-12-17 | 2022-04-20 | Magnetic recording media, magnetic recording/reproducing devices, and magnetic recording media cartridges |
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| JP2000215433A (en) * | 1999-01-19 | 2000-08-04 | Sony Corp | Magnetic recording medium |
| JP2004005891A (en) * | 2002-03-20 | 2004-01-08 | Hitachi Maxell Ltd | Magnetic tape and magnetic tape cartridge |
| JP2004273070A (en) * | 2003-03-11 | 2004-09-30 | Fuji Photo Film Co Ltd | Magnetic recording medium |
| JP2006065953A (en) * | 2004-08-26 | 2006-03-09 | Sony Corp | Magnetic recording medium |
| JP4278001B2 (en) * | 2004-09-30 | 2009-06-10 | 日立マクセル株式会社 | Magnetic tape recording / reproducing method and recording / reproducing apparatus |
| JP2007273036A (en) * | 2006-03-31 | 2007-10-18 | Fujifilm Corp | Magnetic recording medium |
| US7910234B2 (en) * | 2006-04-28 | 2011-03-22 | Imation Corp. | Magnetic recording medium having improved durability for high density applications |
| JP2009087468A (en) * | 2007-09-28 | 2009-04-23 | Fujifilm Corp | Magnetic recording medium, magnetic signal reproduction method and magnetic signal reproduction system |
| JP6291511B2 (en) * | 2015-01-22 | 2018-03-14 | Ｄｏｗａエレクトロニクス株式会社 | Magnetic powder for magnetic recording media |
| JP6739402B2 (en) * | 2017-06-09 | 2020-08-12 | 富士フイルム株式会社 | Magnetic recording medium |
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