JPH03296915A - Magnetic recording medium - Google Patents
Magnetic recording mediumInfo
- Publication number
- JPH03296915A JPH03296915A JP9986190A JP9986190A JPH03296915A JP H03296915 A JPH03296915 A JP H03296915A JP 9986190 A JP9986190 A JP 9986190A JP 9986190 A JP9986190 A JP 9986190A JP H03296915 A JPH03296915 A JP H03296915A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- magnetic
- metal
- tape
- thick
- 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
- -1 polyethylene terephthalate Polymers 0.000 claims abstract description 22
- 229910052751 metal Inorganic materials 0.000 claims abstract description 19
- 239000002184 metal Substances 0.000 claims abstract description 19
- 239000011347 resin Substances 0.000 claims abstract description 12
- 229920005989 resin Polymers 0.000 claims abstract description 12
- 229920000139 polyethylene terephthalate Polymers 0.000 claims abstract description 9
- 239000005020 polyethylene terephthalate Substances 0.000 claims abstract description 9
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 5
- 229920002301 cellulose acetate Polymers 0.000 claims abstract description 5
- 239000004743 Polypropylene Substances 0.000 claims abstract description 3
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 3
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 3
- 229920000728 polyester Polymers 0.000 claims abstract description 3
- 229920000098 polyolefin Polymers 0.000 claims abstract description 3
- 229920001155 polypropylene Polymers 0.000 claims abstract description 3
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 3
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 3
- 229910052742 iron Inorganic materials 0.000 claims abstract 2
- 239000004952 Polyamide Substances 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- 229920001747 Cellulose diacetate Polymers 0.000 claims description 2
- 239000004642 Polyimide Substances 0.000 claims description 2
- 229910052787 antimony Inorganic materials 0.000 claims description 2
- 229910052737 gold Inorganic materials 0.000 claims description 2
- 229910052745 lead Inorganic materials 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 229910052697 platinum Inorganic materials 0.000 claims description 2
- 229920000515 polycarbonate Polymers 0.000 claims description 2
- 239000004417 polycarbonate Substances 0.000 claims description 2
- 229920001721 polyimide Polymers 0.000 claims description 2
- 229910052707 ruthenium Inorganic materials 0.000 claims description 2
- 229910052715 tantalum Inorganic materials 0.000 claims description 2
- 229910052721 tungsten Inorganic materials 0.000 claims description 2
- UOBYKYZJUGYBDK-UHFFFAOYSA-N 2-naphthoic acid Chemical compound C1=CC=CC2=CC(C(=O)O)=CC=C21 UOBYKYZJUGYBDK-UHFFFAOYSA-N 0.000 claims 1
- 229910052796 boron Inorganic materials 0.000 claims 1
- 229910052733 gallium Inorganic materials 0.000 claims 1
- 229910052732 germanium Inorganic materials 0.000 claims 1
- 229910052763 palladium Inorganic materials 0.000 claims 1
- 229910052709 silver Inorganic materials 0.000 claims 1
- 229910052718 tin Inorganic materials 0.000 claims 1
- 229910052725 zinc Inorganic materials 0.000 claims 1
- 229910052726 zirconium Inorganic materials 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 239000010410 layer Substances 0.000 abstract 8
- 239000011247 coating layer Substances 0.000 abstract 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 8
- 239000011112 polyethylene naphthalate Substances 0.000 description 8
- 239000011888 foil Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000003490 calendering Methods 0.000 description 2
- 238000001723 curing Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Magnetic Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明はビデオテープ等の磁気記録媒体に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to magnetic recording media such as video tapes.
（従来の技術）
磁気テープ等のテープ状磁気記録媒体においては、長時
間化の要求により磁気記録媒体自体を薄くする傾向にあ
る。そのためには磁性層を支持する非磁性支持体も薄く
しなければならない。また、テープの始端及び終端検知
のためにテープに遮光性を持たせるタイプのものにあっ
てはカーボンブラック等の遮光材を磁性層に含有させた
り、カーボンブラック等を含有した遮光のための層を別
途設けるようにしている。(Prior Art) In tape-shaped magnetic recording media such as magnetic tapes, there is a tendency to make the magnetic recording media themselves thinner due to the demand for longer recording times. To achieve this, the nonmagnetic support that supports the magnetic layer must also be made thinner. In addition, if the tape has a light-shielding property for detecting the beginning and end of the tape, the magnetic layer may contain a light-shielding material such as carbon black, or a light-shielding layer containing carbon black or the like may be used. is provided separately.
（発明が解決しようとする課題）
しかしながら、支持体を薄くすることによって磁気記録
媒体の物理的強度が弱まり、テープ切れやテープのエツ
ジ折れ等を生じ易くなり、しかもヘッドとテープ間でヘ
ッド当たりが悪くなって電磁変換特性の低下を招くこと
になる。その上に、カーボンブラック等の遮光材を磁性
層に含有させることは、磁性体の充填率が下がることに
なり、良好な電磁変換特性が得られなくなり、またカー
ボンブラック等を含有した遮光のための層を別途設ける
のでは、製造工数が増加する。(Problems to be Solved by the Invention) However, by making the support thinner, the physical strength of the magnetic recording medium is weakened, making it more likely to cause tape breakage and tape edge bending, and furthermore, the head contact between the head and the tape is reduced. As a result, the electromagnetic conversion characteristics deteriorate. In addition, if the magnetic layer contains a light shielding material such as carbon black, the filling rate of the magnetic material will decrease, making it impossible to obtain good electromagnetic conversion characteristics. Providing a separate layer increases the number of manufacturing steps.
（課題を解決するための手段）
上記課題を解決するため本発明は、金属を含む層の両面
又は片面に樹脂層を形成して支持体とし、この支持体の
一面に磁性層を形成するようにした。(Means for Solving the Problems) In order to solve the above problems, the present invention provides a support in which a resin layer is formed on both sides or one side of a layer containing metal, and a magnetic layer is formed on one side of this support. I made it.
本発明で使用する金属としては、例えばＡＩ。Examples of metals used in the present invention include AI.
Ｔｉ、Ｖ、Ｃｒ、Ｍｎ、Ｆｅ５ＣｏＳＮｉＳＣｕｓＺｎ
、Ｇａ、Ｇｅ５Ｚｒ、Ｍｏ、Ｒｕ、、Ｐｄ、Ａｇ５Ｓｎ
、Ｓｂ、Ｔａ、Ｗ、Ｐｔ、Ａｕ、Ｐｂ。Ti, V, Cr, Mn, Fe5CoSNiSCusZn
, Ga, Ge5Zr, Mo, Ru, , Pd, Ag5Sn
, Sb, Ta, W, Pt, Au, Pb.
Ｂｉ等を挙げることができる。Examples include Bi.
また、樹脂としては、例えばポリエチレンテレフタレー
ト、ポリエチレン−２，６−ナフタレート等のポリエス
テル類、ポリプロピレン等のポリオレフィン類、セルロ
ースアセテート、セルロースジアセテート等のセルロー
スアセテート類、ポリイミド、ポリアミド、ポリカーボ
ネイト等を挙げることができる。Examples of the resin include polyesters such as polyethylene terephthalate and polyethylene-2,6-naphthalate, polyolefins such as polypropylene, cellulose acetates such as cellulose acetate and cellulose diacetate, polyimide, polyamide, and polycarbonate. can.
（作用）
支持体は金属を含む層の両面又は片面にプラスチックの
層を形成してなるので、薄くとも十分な強度を有して磁
気記録媒体の耐久性が向上し、良好な電磁変換特性が得
られ、またバックコート等の遮光層がなくとも十分な遮
光性が得られる。(Function) Since the support is formed by forming a plastic layer on both or one side of the metal-containing layer, it has sufficient strength even if it is thin, improving the durability of the magnetic recording medium and providing good electromagnetic conversion characteristics. Furthermore, sufficient light-shielding properties can be obtained even without a light-shielding layer such as a back coat.
（実施例）
以下に本発明を具体的な実施例１〜１３及び比較例１〜
２を挙げて説明する。尚、上記実施例のうち実施例１〜
２については第１図に示すように、非磁性支持体１を金
属箔２の両面に樹脂層３を形成して構成し、この非磁性
支持体１の一面に磁性層４を形成したものとし、実施例
３〜１３については第２図に示すように金属箔２の片面
に樹脂層３を形成して非磁性支持体１としたものとした
。(Example) Specific examples 1 to 13 and comparative examples 1 to 13 of the present invention will be described below.
2 will be listed and explained. In addition, among the above-mentioned examples, Examples 1 to 2
As for 2, as shown in FIG. 1, a non-magnetic support 1 is constructed by forming a resin layer 3 on both sides of a metal foil 2, and a magnetic layer 4 is formed on one surface of this non-magnetic support 1. In Examples 3 to 13, a resin layer 3 was formed on one side of a metal foil 2 to form a nonmagnetic support 1, as shown in FIG.
Ｋ胤■ユ
厚さ７μｍのアルミニウム箔の両面に厚さ３μｍのポリ
エチレンテレフタレートからなる層を設けてなる非磁性
体支持体に磁性層を塗布し、乾燥、カレンダ、硬化、裁
断工程を経て磁気テープを得た。A magnetic layer is coated on a non-magnetic support made of a 7-μm-thick aluminum foil with a 3-μm-thick layer of polyethylene terephthalate on both sides, and a magnetic tape is formed through drying, calendering, curing, and cutting steps. I got it.
友１■ス
厚さ７μｍのニッケル箔の両面に厚さ３μｍのポリエチ
レンテレフタレートからなる層を設けてなる非磁性体支
持体に磁性層を塗布し、実施例１と同様にして磁気テー
プを得た。A magnetic layer was applied to a non-magnetic support consisting of a layer of polyethylene terephthalate with a thickness of 3 μm on both sides of a nickel foil with a thickness of 7 μm, and a magnetic tape was obtained in the same manner as in Example 1. .
Ｋ胤■１
厚さ７μｍのアルミニウム箔の片面に厚さ６μｍのポリ
エチレンテレフタレートからなる層を設けてなる非磁性
体支持体に磁性層を塗布し、実施例１と同様にして磁気
テープを得た。K-tane ■1 A magnetic layer was applied to a non-magnetic support consisting of a 6-μm-thick layer of polyethylene terephthalate on one side of a 7-μm-thick aluminum foil, and a magnetic tape was obtained in the same manner as in Example 1. .
犬ｍ
厚さ７μｍのアルミニウム箔の片面に厚さ６μｍのポリ
アミドからなる層を設けてなる非磁性体支持体に磁性層
を塗布し、実施例１と同様にして磁気テープを得た。A magnetic tape was obtained in the same manner as in Example 1 by applying a magnetic layer to a nonmagnetic support consisting of a 6 μm thick polyamide layer provided on one side of a 7 μm thick aluminum foil.
Ｋ五五五
厚さ７μｍのニッケル箔の片面に厚さ６μｍのポリエチ
レンテレフタレートからなる層を設けてなる非磁性体支
持体に磁性層を塗布し、実施例１と同様にして磁気テー
プを得た。K555 A magnetic layer was applied to a non-magnetic support consisting of a 6 μm thick layer of polyethylene terephthalate on one side of a 7 μm thick nickel foil, and a magnetic tape was obtained in the same manner as in Example 1. .
夫立勇ｌ
厚さ１２μｍのポリエチレンテレフタレートの片面に厚
さ０．５μｍのＡ１層を設けてなる非磁性体支持体の金
属層側に磁性層を塗布し、実施例１と同様にして磁気テ
ープを得た。A magnetic layer was applied to the metal layer side of a non-magnetic support consisting of a 0.5 μm thick A1 layer provided on one side of polyethylene terephthalate with a thickness of 12 μm, and a magnetic tape was prepared in the same manner as in Example 1. I got it.
Ｋ嵐丞ユ
厚さ１２μｍのポリエチレンナフタレートの片面に厚さ
０．５μｍのＡ１層を設けてなる非磁性体支持体の金属
層側に磁性層を塗布し、実施例１と同様にして磁気テー
プを得た。A magnetic layer was coated on the metal layer side of a non-magnetic support made of polyethylene naphthalate with a thickness of 12 μm and an A1 layer with a thickness of 0.5 μm provided on one side, and a magnetic layer was applied in the same manner as in Example 1. Got the tape.
Ｋ胤五１
厚さ１２μｍのポリエチレンナフタレートの片面に厚さ
０．５μｍのＣｒ層を設けてなる非磁性体支持体の金属
層側に磁性層を塗布し、実施例１と同様にして磁気テー
プを得た。K.Tanego1 A magnetic layer was coated on the metal layer side of a non-magnetic support consisting of a 0.5 μm thick Cr layer provided on one side of 12 μm thick polyethylene naphthalate, and magnetic layer was applied in the same manner as in Example 1. Got the tape.
Ｋ五勇遣
厚さ１２μｍのポリエチレンナフタレートの片面に厚さ
０．５μｍのＴｉ層を設けてなる非磁性体支持体の金属
層側に磁性層を塗布し、実施例１と同様にして磁気テー
プを得た。A magnetic layer was coated on the metal layer side of a non-magnetic support consisting of a 0.5 μm thick Ti layer provided on one side of a 12 μm thick polyethylene naphthalate, and a magnetic layer was applied in the same manner as in Example 1. Got the tape.
Ｋ五五上没
厚さ１２μｍのポリエチレンナフタレートの片面に厚さ
０．５μｍのＣｕ層を設けてなる非磁性体支持体の金属
層側に磁性層を塗布し、実施例１と同様にして磁気テー
プを得た。A magnetic layer was coated on the metal layer side of a non-magnetic support consisting of a 0.5 μm thick Cu layer provided on one side of a 12 μm thick polyethylene naphthalate layer, and the same procedure as in Example 1 was carried out. Obtained magnetic tape.
塞Ｊ１け１」１
厚さ１２μｍのポリエチレンナフタレートの片面に厚さ
０．５μｍのＺｎ層を設けてなる非磁性体支持体の金属
層側に磁性層を塗布し、実施例１と同様にして磁気テー
プを得た。A magnetic layer was coated on the metal layer side of a non-magnetic support consisting of a 0.5 μm thick Zn layer provided on one side of a 12 μm thick polyethylene naphthalate layer, and the process was carried out in the same manner as in Example 1. A magnetic tape was obtained.
犬嵐夫１遣
厚さ１２μｍのポリエチレンナフタレートの片面に厚さ
０．５μｍのＦｅ層を設けてなる非磁性体支持体の金属
層側に磁性層を塗布し、実施例１と同様にして磁気テー
プを得た。A magnetic layer was coated on the metal layer side of a non-magnetic support consisting of a 0.5 μm thick Fe layer provided on one side of a 12 μm thick polyethylene naphthalate layer, and the process was carried out in the same manner as in Example 1. Obtained magnetic tape.
夾ｌ透１１
厚さ１２μｍのポリエチレンナフタレートの片面に厚さ
０．５μｍのパーマロイ合金層を設けてなる非磁性体支
持体の金属層側に磁性層を塗布し、実施例１と同様にし
て磁気テープを得た。Transmission 11 A magnetic layer was applied to the metal layer side of a non-magnetic support consisting of a 0.5 μm thick permalloy alloy layer provided on one side of 12 μm thick polyethylene naphthalate, and the same procedure as in Example 1 was carried out. Obtained magnetic tape.
坂蚊■ユ
厚さ１２μｍのポリエチレンテレフタレートの片面に実
施例１と同様の磁性層を設け、さらに反対側の面に厚さ
１μｍのバックコート層を設け、乾燥、カレンダ、硬化
、裁断工程を経て磁気テープを得た。A magnetic layer similar to that in Example 1 was provided on one side of polyethylene terephthalate with a thickness of 12 μm, and a back coat layer with a thickness of 1 μm was provided on the opposite side, followed by drying, calendering, curing, and cutting steps. Obtained magnetic tape.
埼較貫）
厚さ１２μｍのポリエチレンナフタレートの片面に実施
例１と同様の磁性層を設け、さらに反対側の面に厚さ１
μｍのバックコート層を設け、比較例１と同様にして磁
気テープを得た。A magnetic layer similar to that in Example 1 was provided on one side of polyethylene naphthalate with a thickness of 12 μm, and a magnetic layer with a thickness of 1 μm was provided on the opposite side.
A magnetic tape was obtained in the same manner as in Comparative Example 1 except that a back coat layer of .mu.m was provided.
そして、これらの各磁気テープを次の評価試験に供した
。Each of these magnetic tapes was then subjected to the following evaluation test.
耐久性試験＝２００パス後のテープ切れ発生率（％）及
びテープ折れ発生率（％）を計測した。Durability test: After 200 passes, the tape breakage rate (%) and tape bending rate (%) were measured.
尚、テープ折れ発生率にはテープ切れ発生のちのは含ま
ない。Note that the tape breakage rate does not include the occurrence of tape breakage.
電磁変換特性試験（Ｙ−３／Ｎ比、Ｃ−３／Ｎ比）：比
較例１の値をｒＯＪとして相対値を測定した。Electromagnetic conversion characteristic test (Y-3/N ratio, C-3/N ratio): Relative values were measured using the value of Comparative Example 1 as rOJ.
これらの評価試験の結果を第１表に示す。この試験結果
から明らかなように、実施例の磁気テープは比較例の磁
気テープに比べて、遮光性及び耐久性に優れていること
が分る。The results of these evaluation tests are shown in Table 1. As is clear from the test results, it can be seen that the magnetic tape of the example has better light shielding properties and durability than the magnetic tape of the comparative example.
第１表
（発明の効果）
以上説明したように本発明によれば、支持体は金属を含
む層の両面又は片面に樹脂層を形成して構成したので、
薄くとも十分な強度を有して磁気記録媒体の耐久性が向
上し、良好な電磁変換特性が得られ、またバックコート
等の遮光層がなくとも十分な遮光性が得られる。Table 1 (Effects of the Invention) As explained above, according to the present invention, the support is constructed by forming a resin layer on both sides or one side of a layer containing metal, so that
Even if it is thin, it has sufficient strength and the durability of the magnetic recording medium is improved, good electromagnetic conversion characteristics can be obtained, and sufficient light-shielding properties can be obtained even without a light-shielding layer such as a back coat.
第１図及び第２図は本発明に係る磁気記録媒体の斜視図
である。
１・・・非磁性支持体、２・・・金属箔、３・・・樹脂
層、４・・・磁性層。1 and 2 are perspective views of a magnetic recording medium according to the present invention. DESCRIPTION OF SYMBOLS 1...Nonmagnetic support, 2...Metal foil, 3...Resin layer, 4...Magnetic layer.
Claims (2)
体において、前記支持体は金属を含む層の両面又は片面
に樹脂層を形成してなることを特徴とする磁気記録媒体
。(1) A magnetic recording medium in which a magnetic layer is provided on one surface of a non-magnetic support, characterized in that the support is formed by forming a resin layer on both or one side of a layer containing metal.
としたことを特徴とする請求項１に記載の磁気記録媒体
。 金属；Ａｌ、Ｔｉ、Ｖ、Ｃｒ、Ｍｎ、Ｆｅ、Ｃｏ、Ｎｉ
、Ｃｕ、Ｚｎ、Ｇａ、Ｇｅ、Ｚｒ、Ｍｏ、Ｒｕ、Ｐｄ、
Ａｇ、Ｓｎ、Ｓｂ、Ｔａ、Ｗ、Ｐｔ、Ａｕ、Ｐｂ及びＢ
ｉのうちの少なくとも１種。 樹脂；ポリエチレンテレフタレート、ポリエチレン−２
，６−ナフタレート等のポリエステル類、ポリプロピレ
ン等のポリオレフィン類、セルロースアセテート、セル
ロースジアセテート等のセルロースアセテート類、ポリ
イミド、ポリアミド又はポリカーボネイトのうちの１種
。(2) The magnetic recording medium according to claim 1, wherein the metal and resin constituting the support are as follows. Metal; Al, Ti, V, Cr, Mn, Fe, Co, Ni
, Cu, Zn, Ga, Ge, Zr, Mo, Ru, Pd,
Ag, Sn, Sb, Ta, W, Pt, Au, Pb and B
At least one of i. Resin; polyethylene terephthalate, polyethylene-2
, polyesters such as 6-naphthalate, polyolefins such as polypropylene, cellulose acetates such as cellulose acetate, cellulose diacetate, polyimide, polyamide, or polycarbonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9986190A JPH03296915A (en) | 1990-04-16 | 1990-04-16 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9986190A JPH03296915A (en) | 1990-04-16 | 1990-04-16 | Magnetic recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03296915A true JPH03296915A (en) | 1991-12-27 |
Family
ID=14258587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9986190A Pending JPH03296915A (en) | 1990-04-16 | 1990-04-16 | Magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03296915A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006182842A (en) * | 2004-12-27 | 2006-07-13 | Du Pont Toray Co Ltd | Polyimide film |
-
1990
- 1990-04-16 JP JP9986190A patent/JPH03296915A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006182842A (en) * | 2004-12-27 | 2006-07-13 | Du Pont Toray Co Ltd | Polyimide film |
| JP4635603B2 (en) * | 2004-12-27 | 2011-02-23 | 東レ・デュポン株式会社 | Polyimide film |
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