JPS62185230A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPS62185230A JPS62185230A JP61027120A JP2712086A JPS62185230A JP S62185230 A JPS62185230 A JP S62185230A JP 61027120 A JP61027120 A JP 61027120A JP 2712086 A JP2712086 A JP 2712086A JP S62185230 A JPS62185230 A JP S62185230A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- weight
- alumina
- tio2
- amt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 30
- 239000002245 particle Substances 0.000 claims abstract description 16
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 14
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims abstract description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 239000003973 paint Substances 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 22
- 230000000694 effects Effects 0.000 abstract description 5
- 238000005498 polishing Methods 0.000 abstract description 5
- 229910020630 Co Ni Inorganic materials 0.000 abstract description 3
- 229910002440 Co–Ni Inorganic materials 0.000 abstract description 3
- 230000007423 decrease Effects 0.000 abstract description 3
- 229910052742 iron Inorganic materials 0.000 abstract description 3
- 239000000696 magnetic material Substances 0.000 abstract description 3
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 abstract description 2
- 229910006297 γ-Fe2O3 Inorganic materials 0.000 abstract 2
- 229910020674 Co—B Inorganic materials 0.000 abstract 1
- 229910017061 Fe Co Inorganic materials 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 238000012856 packing Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 5
- 239000006229 carbon black Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- -1 polyethylene terephthalate Polymers 0.000 description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 229910001651 emery Inorganic materials 0.000 description 3
- 239000006247 magnetic powder Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229920005749 polyurethane resin Polymers 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- IIZPXYDJLKNOIY-JXPKJXOSSA-N 1-palmitoyl-2-arachidonoyl-sn-glycero-3-phosphocholine Chemical compound CCCCCCCCCCCCCCCC(=O)OC[C@H](COP([O-])(=O)OCC[N+](C)(C)C)OC(=O)CCC\C=C/C\C=C/C\C=C/C\C=C/CCCCC IIZPXYDJLKNOIY-JXPKJXOSSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical group [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000000020 Nitrocellulose Substances 0.000 description 2
- 235000021355 Stearic acid Nutrition 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000000787 lecithin Substances 0.000 description 2
- 229940067606 lecithin Drugs 0.000 description 2
- 235000010445 lecithin Nutrition 0.000 description 2
- 229920001220 nitrocellulos Polymers 0.000 description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 2
- 239000005056 polyisocyanate Substances 0.000 description 2
- 229920001228 polyisocyanate Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000008117 stearic acid Substances 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 1
- QMMJWQMCMRUYTG-UHFFFAOYSA-N 1,2,4,5-tetrachloro-3-(trifluoromethyl)benzene Chemical compound FC(F)(F)C1=C(Cl)C(Cl)=CC(Cl)=C1Cl QMMJWQMCMRUYTG-UHFFFAOYSA-N 0.000 description 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 1
- 101000645318 Drosophila melanogaster Titin Proteins 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 1
- PXXSHCAEZBHGII-UHFFFAOYSA-N [O-2].[Fe+2].C(CCCCCCCC=C/CCCCCCCC)(=O)O Chemical compound [O-2].[Fe+2].C(CCCCCCCC=C/CCCCCCCC)(=O)O PXXSHCAEZBHGII-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 239000013034 phenoxy resin Substances 0.000 description 1
- 229920006287 phenoxy resin Polymers 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 101150107611 rio2 gene Proteins 0.000 description 1
- 229910000702 sendust Inorganic materials 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、オーディオテ〜プ、ビデオテープ。[Detailed description of the invention] Industrial applications The present invention relates to audio tapes and video tapes.
磁気ディスク等に用いることができる磁気記録媒体に関
するものである。The present invention relates to a magnetic recording medium that can be used for magnetic disks and the like.
従来の技術
近年、特にビデオテープにおいては電磁変換特性の改善
のために媒体に適度な研摩力を付与することによりフェ
ライトヘッドの摺動ノイズを低減させようと精力的に研
究が進められている。一方、粒子性ノイズを低減させる
ために高分散化すると共に、磁性粉の微粒子化がおこな
われＢ、ＩｊＴ、比表面積で６０ ｍ” ／ ！ｉ’程
度の粉体が大量生産可能となっている。磁性粉の微粒子
化にともない、テープとしての研摩力が低下し摺動ノイ
ズが増加することがあきらかとなってきた。BACKGROUND OF THE INVENTION In recent years, research has been actively conducted to reduce the sliding noise of ferrite heads by applying an appropriate abrasive force to the medium, particularly in video tapes, in order to improve the electromagnetic characteristics. On the other hand, in order to reduce particulate noise, high dispersion has been achieved, and magnetic powder has been made into fine particles, making it possible to mass produce powder with a B, IjT, and specific surface area of approximately 60 m"/!i'. It has become clear that as magnetic powder particles become finer, the abrasive power of tapes decreases and sliding noise increases.
発明が解決しようとする問題点
その対策としてより効果的な研摩材としてα−アルミナ
が提案されるに至った。研摩力については改善されたが
、耐摩耗性については、まだ満足すべき状態にあるとは
いえない。As a countermeasure to the problems that the invention seeks to solve, α-alumina has been proposed as a more effective abrasive material. Although the polishing power has been improved, the wear resistance is still not in a satisfactory state.
本発明は、研摩力と耐摩耗性を有することにより耐久性
が向上した磁気記録媒体を提供することを目的とするも
のである。An object of the present invention is to provide a magnetic recording medium with improved durability due to its abrasive power and abrasion resistance.
問題点を解決するだめの手段
この問題点を解決するために、本発明は研摩材としてア
ルミナ粒子を用い、耐摩耗性向上のだめにＴｉＯ２をア
ルミナ粒子に対して２〜３０重量％含有させることを特
徴とする磁気記録媒体である。Means to Solve the Problem In order to solve this problem, the present invention uses alumina particles as an abrasive and includes 2 to 30% by weight of TiO2 based on the alumina particles in order to improve wear resistance. This is a magnetic recording medium with special characteristics.
作用
この構成により、耐摩耗性を向上させることが可能とな
る。Effect: This configuration makes it possible to improve wear resistance.
実施例
電磁変換特性の向上対策として、磁性層の平滑化をはか
りながら粒子性ノイズを低減させるために磁性粉の微粒
子化が積極的にすすめられＩｊｌｊＴ。EXAMPLE As a measure to improve electromagnetic conversion characteristics, it is actively promoted to make the magnetic powder into fine particles in order to smooth the magnetic layer and reduce particle noise.
比表面積が６０ｍ１／ＩｉＩまでに達している。その反
面、媒体の研摩力が低下し、フェライトヘッドとの摺動
ノイズが増加するという影響があられれてきた。その対
策として効果的な研摩材の探索がおこなわれて、α−ア
ルｉすがベンガラ、 Ｃｒ２Ｏ５。The specific surface area reaches up to 60 m1/IiI. On the other hand, the abrasive power of the medium has decreased and the noise caused by sliding with the ferrite head has increased. As a countermeasure to this problem, effective abrasives have been searched for, including α-aluminum red iron oxide and Cr2O5.
ＳｉＣ、ＴｉＯ２に比べすぐれた研摩材であることが見
い出された。It was found that it is an excellent abrasive compared to SiC and TiO2.
しかしながら、耐久性を向上させるためには媒体の研摩
力と耐摩耗性の改善が不可欠であり、α−アルミナで研
摩力の改善がはかれるものの耐摩耗性については効果が
少ないことが判明した。本発明者は塗膜強度という観点
から耐摩耗性の問題に鋭意取り組み、α−アルミナとＴ
ｉＯ２を併用すれば耐摩耗性が向上し耐久性にすぐれた
磁気記録媒体が得られることを見い出し本発明に至った
ものである。本発明に用いられるＴｌＯ２粒子の平均粒
径は１μｍ以下、好ましくは０．０５〜０．３μｍであ
り、その添加量はアルｉすに対して２〜３０重量係であ
る。２係以下であると耐摩耗性に対する効果がなく、３
部チ以上であると磁性層中の磁性体の充填塵が低下しノ
イズが増大するので好ましくない。However, in order to improve durability, it is essential to improve the abrasive power and abrasion resistance of the medium, and it has been found that although α-alumina can improve the abrasive power, it has little effect on the abrasion resistance. The present inventor has worked hard to solve the problem of abrasion resistance from the perspective of coating film strength, and has
The present invention was based on the discovery that when iO2 is used in combination, a magnetic recording medium with improved wear resistance and excellent durability can be obtained. The average particle diameter of the TlO2 particles used in the present invention is 1 .mu.m or less, preferably 0.05 to 0.3 .mu.m, and the amount added is 2 to 30 percent by weight relative to the aluminum. If the coefficient is 2 or less, there is no effect on wear resistance, and if the coefficient is 3
If it is more than 50%, the amount of dust filled in the magnetic material in the magnetic layer decreases and noise increases, which is not preferable.
本発明に使用できる強磁性粉末としては、７−Ｆｅ２Ｏ
３、Ｃｏ含有７−Ｆｅ２Ｏ３、Ｆｅ 、 Ｆｅ−Ｇｏ
。The ferromagnetic powder that can be used in the present invention includes 7-Fe2O
3. Co-containing 7-Fe2O3, Fe, Fe-Go
.
Ｆｅ −Ｎｉ 、 Ｇｏ−Ｎｉ 、 Ｆｅ−Ｇｏ−Ｎｉ
、 Ｆｅ −１ｃｏ−Ｂ 。Fe-Ni, Go-Ni, Fe-Go-Ni
, Fe-1co-B.
Ｆｅ−Ｇｏ−Ｃｒ−Ｂ などがあげられる。結合剤と
してはポリウレタン樹脂、親水基を導入したポリウレタ
ン樹脂、親水基を導入したニトロセルロース誘導体、ニ
トロセルロース、ポリニスルチル樹脂。Examples include Fe-Go-Cr-B. As binders, polyurethane resins, polyurethane resins with hydrophilic groups introduced, nitrocellulose derivatives with hydrophilic groups introduced, nitrocellulose, and polynisrutile resins are used.
塩化ビニル樹脂、塩化ビニル−酢酸ビニル−ビニルアル
コール共重合体、親水基を導入した塩化ビニル誘導体、
ブチラール樹脂、フェノキシ樹脂などが使用できる。分
散剤としてはレシチン、もしくはオレイン酸、ステアリ
ン酸などのような高級脂肪酸が使用できる。Vinyl chloride resin, vinyl chloride-vinyl acetate-vinyl alcohol copolymer, vinyl chloride derivatives with hydrophilic groups introduced,
Butyral resin, phenoxy resin, etc. can be used. As a dispersing agent, lecithin or higher fatty acids such as oleic acid, stearic acid, etc. can be used.
研摩材としてはα−アルばすを使用する。帯電防止剤と
してはケッチンブラック！、Ｃ０のような導電性カーボ
ンを添加することもできる。さらにグラフフィト化カー
ボンブラックを使用することもできる。α-Albas is used as the abrasive. Kettin Black is an antistatic agent! , CO may also be added. Furthermore, graphite carbon black can also be used.
磁性塗料の混線分散にあたっては、各種の混練機が使用
される。例えば、三本ロールミル、加圧ニーダ−２高速
ストーンミル、ヘンシェルばキサ−９振動ミル、高速イ
ンペラー分散機、ディスパー、ボールミル、ペブルミル
、サンドグラインダー、アトライタ、アジテータミル、
コボールミル。Various kneaders are used to mix and disperse magnetic paint. For example, three roll mill, pressure kneader 2 high speed stone mill, Henschel Vaxa 9 vibration mill, high speed impeller disperser, disper, ball mill, pebble mill, sand grinder, attritor, agitator mill,
Kobor Mill.
ホモジナイザー、超音波分散機などが単独もしくは組合
せて用いられる。A homogenizer, an ultrasonic disperser, etc. can be used alone or in combination.
以下さらに本発明を具体的に説明する。The present invention will be further explained in detail below.
実施例１
強磁性ＣＯ被着酸化鉄
オレイン酸 １重量
部ポリウレタン脂 １０重量
部ニトロセルロース １０重量部
α−アルミナ（平均粒径０．３μｍ） ５
重量部Ｔｉ０２（平均粒径０．１μｍ）
１重量部カーボンブラック、Ｓ−１７０（デクサ社商
品名）３重量部ステアリン酸ブチル
１重量部上記の組成物を加圧ニーダ−とサンドグラ
インダーを用いて５時間混合分散して磁性塗料とした。Example 1 Ferromagnetic CO-adhered iron oxide oleic acid 1 part by weight Polyurethane resin 10 parts by weight Nitrocellulose 10 parts by weight α-alumina (average particle size 0.3 μm) 5
Weight part Ti02 (average particle size 0.1 μm)
1 part by weight carbon black, S-170 (trade name of Dexa) 3 parts by weight butyl stearate
1 part by weight of the above composition was mixed and dispersed for 5 hours using a pressure kneader and a sand grinder to obtain a magnetic paint.
次にコロネートＬ（ポリイソシアネート、日本ポリウレ
タン（株）商品名）４部を加え、平均孔径１μｍのフィ
ルターで濾過する。１４μｍ厚のポリエチレンテレフタ
レートフィルム上に塗布、配向、乾燥、鏡面加工後硬化
する０さらに磁性層と反対側のポリエチレンテレフタレ
ート上にカーボンブラックを主成分とするバックコート
層を設けて磁気テープを得た。Next, 4 parts of Coronate L (polyisocyanate, trade name of Nippon Polyurethane Co., Ltd.) is added, and the mixture is filtered through a filter with an average pore size of 1 μm. A magnetic tape was obtained by coating a 14 μm thick polyethylene terephthalate film, aligning it, drying it, and hardening it after mirror polishing.Furthermore, a back coat layer containing carbon black as a main component was provided on the polyethylene terephthalate film on the opposite side to the magnetic layer, to obtain a magnetic tape.
比較例１
実施例１においてＴｉＯ２を除く以外は同様にして磁気
テープを得た。Comparative Example 1 A magnetic tape was obtained in the same manner as in Example 1 except that TiO2 was removed.
比較例２
実施例１においてＴｉＯ２を除き、α−アルミナの添加
量を６重量部とする以外は同様にして磁気テープを得だ
。Comparative Example 2 A magnetic tape was obtained in the same manner as in Example 1 except that TiO2 was removed and the amount of α-alumina added was 6 parts by weight.
実施例２
実施例１において酸化鉄をＦｅ −Ｃｏ −Ｎｉ合金比
較例３
実施例２においてＴｉＯ２を除く以外は同様にして磁気
テープを得た。Example 2 A magnetic tape was obtained in the same manner as in Example 1 except that iron oxide was replaced with Fe-Co-Ni alloy.Comparative Example 3 In Example 2, except that TiO2 was removed.
比較例４
実施例２においてで１０２を除き、α−アルミナの添加
量を６重量部とする以外は同様にして磁気テープを得た
。Comparative Example 4 A magnetic tape was obtained in the same manner as in Example 2 except that 102 was removed and the amount of α-alumina added was 6 parts by weight.
実施例３
強磁性金属鉄粉末
レシチン １重量部α
−アルミナ（平均粒径ｏ、２６μｍ） ７重量部
Ｔｉ０２（平均粒径ｏ、３μｍ） ２重量
部グラファイト（平均０．６μｍ） １重
量部ステアリン酸 １重
量部上記組成物をヘンシェルεキサ−とコボールミルを
用いて６時間混合分散して磁性塗料としだ。Example 3 Ferromagnetic metal iron powder lecithin 1 part by weight α
- Alumina (average particle size o, 26 μm) 7 parts by weight Ti02 (average particle size o, 3 μm) 2 parts by weight graphite (average 0.6 μm) 1 part by weight stearic acid 1 part by weight The mixture was mixed and dispersed for 6 hours to form a magnetic paint.
デスモジュールＬ（バイエル社製ポリイソシアネート商
品名）４部を加えディスパーで撹拌した後平均孔径１μ
ｍのフィルターで濾過をする。After adding 4 parts of Desmodur L (trade name of polyisocyanate manufactured by Bayer) and stirring with a disper, the average pore size was 1μ.
Filter with a m filter.
１０μｍ厚のポリエチレンテレフタレート上ニ塗布、配
向、乾燥、鏡面加工後硬化する。Coating on 10 μm thick polyethylene terephthalate, orientation, drying, mirror polishing, and then curing.
さらに、磁性層と反対側のポリエチレンテレフタレート
上にカーボンブラックを主成分とするバックコート層を
設けて磁気テープを得た。Furthermore, a back coat layer containing carbon black as a main component was provided on the polyethylene terephthalate on the side opposite to the magnetic layer to obtain a magnetic tape.
比較例６
実施例３においてＴｉＯ２を除く以外は同様にして磁気
テープを得た。Comparative Example 6 A magnetic tape was obtained in the same manner as in Example 3 except that TiO2 was removed.
比較例６
実施例３において’ｒｉｏ２を除き、α−アルばすの添
加量を９重量部とする以外は同様にして磁気テープを得
た。Comparative Example 6 A magnetic tape was obtained in the same manner as in Example 3 except that 'rio2 was omitted and the amount of α-Albas added was 9 parts by weight.
得られた各磁気テープをμインチに裁断し、カセットハ
ーフに巻きこんで６ ＭＨｚにおけるｃ／Ｎを測定した
。Each of the obtained magnetic tapes was cut into μ inch pieces, wound into a cassette half, and the c/N at 6 MHz was measured.
Ｃ／Ｎ測定用ビデオデツキはＶＨＳビデオテープレコー
ダー（松下電器産業（株）製ＭＹ−８８００）で鉄もし
くは合金磁性体の場合には記録再生ヘッドはセンダスト
合金に改めた。The video deck for C/N measurement was a VHS video tape recorder (MY-8800 manufactured by Matsushita Electric Industrial Co., Ltd.), and in the case of iron or alloy magnetic material, the recording/reproducing head was changed to Sendust alloy.
標準テープとしてはナショナルビデオテープ。The standard tape is National Videotape.
スーパーＨＧ１２０（ＮＹ−Ｔ１２０Ｈｃ）松下電器産
業（株）製を用い、そのＣ／ＮをＯｄＢとしだ。Super HG120 (NY-T120Hc) manufactured by Matsushita Electric Industrial Co., Ltd. was used, and its C/N was determined as OdB.
耐久性はテープを１０’Ｃ、１０％ＲＨの環境のもとて
１ｏＯパス走行させた後の状態を観察した。Durability was determined by observing the state of the tape after running it for 100 passes in an environment of 10'C and 10% RH.
耐摩耗性は、Ｏ’Ｃの環境下でガラス板上に密着させた
テープ上を荷重１０Ｃ１負荷させたエメリー紙で０．２
ｍ／ｓｅｃ の速度にて１０回摺動させエメリー紙の汚
染状況を調べだ。表面粗度はランクテーラーホブソン社
のタリサーフで測定し、Ｒａで表示した。Ｒａとは表面
粗度の中心線よりの偏差の算術平均を意味するものであ
る。The abrasion resistance was 0.2 with emery paper loaded with a load of 10C1 on a tape adhered to a glass plate in an O'C environment.
Slide the emery paper 10 times at a speed of m/sec and check the contamination status of the emery paper. The surface roughness was measured using Talysurf manufactured by Rank Taylor Hobson and expressed in Ra. Ra means the arithmetic mean of the deviations of the surface roughness from the center line.
以下に結果を示す。The results are shown below.
（以 下 余 白）
発明の効果
以上明らかなように、本発明によればアルミナ粒子にＴ
ｉ ０２を添加した系は添加しない系にくらべ耐摩耗性
が向上し耐久性も改善されている。すなわち、ＴｉＯ２
を添加しても表面粗度を劣化させず、電磁変換特性も低
下させないので耐摩耗性を向上させ耐久性にすぐれた磁
気記録媒体を提供することができる。(Margins below) Effects of the Invention As is clear from the above, according to the present invention, T is added to alumina particles.
The system to which i02 is added has improved wear resistance and durability compared to the system to which it is not added. That is, TiO2
Even when added, the surface roughness is not deteriorated and the electromagnetic conversion characteristics are not deteriorated, so it is possible to provide a magnetic recording medium with improved wear resistance and excellent durability.
Claims (2)
磁性支持体上に塗布した磁性層を具備し、研摩材として
アルミナ粒子にＴｉＯ＿２を含有することを特徴とする
磁気記録媒体。(1) A magnetic recording medium comprising a magnetic layer formed by coating a non-magnetic support with a magnetic paint in which ferromagnetic powder is dispersed in a binder, and containing TiO_2 in alumina particles as an abrasive.
３０重量％であることを特徴とする特許請求の範囲第１
項記載の磁気記録媒体。(2) Addition amount of TiO_2 is 2~2 to arsina particles
Claim 1 characterized in that the amount is 30% by weight.
Magnetic recording medium described in Section 1.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61027120A JPS62185230A (en) | 1986-02-10 | 1986-02-10 | Magnetic recording medium |
| US07/013,445 US4818608A (en) | 1986-02-10 | 1987-02-10 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61027120A JPS62185230A (en) | 1986-02-10 | 1986-02-10 | Magnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62185230A true JPS62185230A (en) | 1987-08-13 |
Family
ID=12212198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61027120A Pending JPS62185230A (en) | 1986-02-10 | 1986-02-10 | Magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62185230A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5613525A (en) * | 1979-07-16 | 1981-02-09 | Tdk Corp | Magnetic recording medium |
| JPS58203626A (en) * | 1982-05-20 | 1983-11-28 | Tdk Corp | Magnetic recording medium |
| JPS6085426A (en) * | 1983-10-17 | 1985-05-14 | Fuji Photo Film Co Ltd | Magnetic recording medium |
-
1986
- 1986-02-10 JP JP61027120A patent/JPS62185230A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5613525A (en) * | 1979-07-16 | 1981-02-09 | Tdk Corp | Magnetic recording medium |
| JPS58203626A (en) * | 1982-05-20 | 1983-11-28 | Tdk Corp | Magnetic recording medium |
| JPS6085426A (en) * | 1983-10-17 | 1985-05-14 | Fuji Photo Film Co Ltd | Magnetic recording medium |
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