JPS5938925A - Magnetic recording material - Google Patents
Magnetic recording materialInfo
- Publication number
- JPS5938925A JPS5938925A JP57148103A JP14810382A JPS5938925A JP S5938925 A JPS5938925 A JP S5938925A JP 57148103 A JP57148103 A JP 57148103A JP 14810382 A JP14810382 A JP 14810382A JP S5938925 A JPS5938925 A JP S5938925A
- Authority
- JP
- Japan
- Prior art keywords
- film
- recording
- distortion
- magnetic tape
- running characteristics
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
- G11B5/739—Magnetic recording media substrates
- G11B5/73923—Organic polymer substrates
- G11B5/73927—Polyester substrates, e.g. polyethylene terephthalate
Landscapes
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Magnetic Record Carriers (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は磁気記録材料に関するものである。磁気記録材
料としては、従来、二軸配向ポリエチレンテレフタレー
ト(以下PETと略記する)フィルムを基材とした磁気
テープが多く用いられている。しかし、記録の高密度化
、記録時間の延長。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to magnetic recording materials. Conventionally, as a magnetic recording material, a magnetic tape based on a biaxially oriented polyethylene terephthalate (hereinafter abbreviated as PET) film is often used. However, recording density has increased and recording time has increased.
磁気テープの小型化に伴ない、薄くても磁気テープとし
ての走行特性が良好でしかも記録の歪を生。With the miniaturization of magnetic tapes, magnetic tapes have good running characteristics even though they are thin, but they do not cause distortion in recording.
じない磁気テープが要求されている。このような要求に
対し、基材のPETフィルムの改良が種々行なわれてい
るが、素材がPETである限り、ある一定厚さ兼下に薄
くすると、磁気テープとしての走行特性が損われたシ、
記録の歪が生じたりする欠点があった。There is a demand for magnetic tape that does not have the same characteristics. In response to these demands, various improvements have been made to the base material PET film, but as long as the material is PET, if it is thinned to a certain thickness, the running characteristics of the magnetic tape will be impaired. ,
There was a drawback that distortion of the recording occurred.
本発明の目的は、上記欠点を解消せしめ、Nくても磁気
テープとしての走行特性が良好で、かつ記録の歪が生じ
ない磁気記録材料を提供せんとするものである。SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks, and to provide a magnetic recording material that has good running characteristics as a magnetic tape even when exposed to N, and does not cause recording distortion.
本発明は、上記目的を達成するため次の構成。The present invention has the following configuration to achieve the above object.
すなわち、下記一般式で表わされる繰り返し単位を85
老ルー以上含むポリエステル3からなシ、少なくとも一
方向のヤング率が550 kg/皿2皿上以上方向の熱
収縮率が4チ以下である二軸配向ボIJ エステルフィ
ルムρ少なくとも片面に磁性層を設けたことを特徴とす
る磁気記録材料である。That is, the repeating unit represented by the following general formula is 85
Biaxially oriented IJ ester film ρ with a Young's modulus in at least one direction of 550 kg/2 plates and a heat shrinkage rate of 4 inches or less in the upper direction. This is a magnetic recording material characterized by the following.
ここで、又はフッ素、塩素、臭素の中から選ばれるハロ
ゲン基または炭素数1〜6のアルキル基。or a halogen group or an alkyl group having 1 to 6 carbon atoms selected from fluorine, chlorine, and bromine.
1、mはそれぞれ1〜2の整数、pは2〜6の整数、q
は2〜4の整数である。1 and m are each an integer of 1 to 2, p is an integer of 2 to 6, q
is an integer from 2 to 4.
本発明の基材フィルムを構成するポリエステル、は、下
記一般式(A)で表わされる繰シ返し単位を85モルチ
以上含むポリエステルである。The polyester constituting the base film of the present invention is a polyester containing 85 moles or more of repeating units represented by the following general formula (A).
一般式(A)で表わされる繰り返し単位が85モルチよ
り少ないと8磁気テープとしての走行特性が悪化し、ま
た記録の歪が生ずるので好ましくない。If the number of repeating units represented by the general formula (A) is less than 85 moles, the running characteristics as an 8-magnetic tape will deteriorate and recording distortion will occur, which is not preferable.
ここで、一般式(’A)におけるXはフッ素、塩素、ま
たは臭素から選ばれるハロゲン基または炭素数1〜乙の
アルキル基であるが、磁気テープとしての走行特性が特
に良好で、記録の歪が特に小さくなるのは、塩素と臭素
、特に塩素である。Xの芳香環における位置は特に限定
されないが、芳香環に隣接した酸素に対してオルトの位
置にあるものが、磁気テープとしての走行特性の点から
特に好ましい。Here, X in the general formula ('A) is a halogen group selected from fluorine, chlorine, or bromine, or an alkyl group having 1 to 2 carbon atoms, which has particularly good running characteristics as a magnetic tape and has distortion in recording. is especially small for chlorine and bromine, especially chlorine. The position of X in the aromatic ring is not particularly limited, but a position ortho to the oxygen adjacent to the aromatic ring is particularly preferred from the viewpoint of running characteristics as a magnetic tape.
また* ta ”はそれぞれ1〜2の整数であるが。Furthermore, *ta'' is an integer of 1 to 2, respectively.
磁気テープとしての走行特性、記録の歪の点から特に好
ましいのは、l=1.m=1である。pは2〜6の整数
、qは2〜4の整数であるが、磁気テープとしての走行
特性、記録の歪の点から特に好ましいのはp=2+ q
=2である。Particularly preferred from the viewpoint of running characteristics as a magnetic tape and recording distortion is l=1. m=1. p is an integer of 2 to 6, and q is an integer of 2 to 4; however, p = 2+ q is particularly preferable in terms of running characteristics as a magnetic tape and recording distortion.
=2.
つまり、磁気テープの走行特性が特に良好となり、記録
の歪が特に小さくなるのは、ポリエステルとして、ポリ
エチレンビスα、β−(2−クロルフェノキシ)エタン
4,4′−ジカルボキシレートを用いた場合である。In other words, the running characteristics of the magnetic tape are particularly good and the recording distortion is particularly small when polyethylene bis α, β-(2-chlorophenoxy) ethane 4,4'-dicarboxylate is used as the polyester. It is.
本発明は、上記の如きポリエステルからなるフィルムを
基材とするが、該フィルムは下記条件を満足する必要が
ある。The present invention uses a film made of polyester as described above as a base material, but the film must satisfy the following conditions.
(1)二軸配向フィルムであること。無配向フィルムや
一軸配向フイルムでは走行特長が良好な磁気テープが得
られないめで好ましくない。(1) It must be a biaxially oriented film. A non-oriented film or a uniaxially oriented film is not preferred because a magnetic tape with good running characteristics cannot be obtained.
(2)少なくとも一方向、好ましくは互いに直交する二
方向のヤング率が550 kg/mm ”以上、灯台は
、磁気テープとしての走行特性が不良となるので好まし
くない。(2) If the Young's modulus in at least one direction, preferably in two directions orthogonal to each other, is 550 kg/mm 2 or more, the lighthouse is not preferable because the running characteristics as a magnetic tape will be poor.
(3) 上記(2)のヤング率を有する方向の熱収縮
率が4チ、好ましくは2チ以下であること。熱収縮率が
4俤より大きいと、記録の歪が大きくなるので好ましく
ない。(3) The thermal shrinkage rate in the direction having the Young's modulus in (2) above is 4 inches, preferably 2 inches or less. It is not preferable that the thermal shrinkage rate is greater than 4 degrees because the distortion of recording becomes large.
また1本発明のうちで、基材フィルムが下記条件を満足
するものが特に好ましい。Further, in one aspect of the present invention, it is particularly preferable that the base film satisfies the following conditions.
(1) 固有粘度が0.3〜1.4.好ましくは04
〜1.6の範囲であること。粘度が上記範囲よシ小さい
場合は磁気テープが走行中に裂けたりするなどのトラブ
ルを生じ、走行特性が不良となり、逆に粘度が上記範囲
より大きい場合は、記録の歪を生じやすくなる。(1) Intrinsic viscosity is 0.3 to 1.4. Preferably 04
- Must be in the range of 1.6. If the viscosity is lower than the above range, troubles such as the magnetic tape tearing during running will occur, resulting in poor running characteristics.On the other hand, if the viscosity is higher than the above range, recording will likely be distorted.
(2) フィルムの厚さ方向の屈折率比が0965〜
0.975.好ましくは0.940〜0.970の範囲
であること。屈折率比が上記範囲より小さい場合は、磁
気′テープが走行中に裂けたり、襞間したシするトラブ
ルを生じやすく、走行特性不良となシやすく、逆に屈折
率比が一犬きい場合にも、磁気テープの走行特性が不良
となることがある。(2) The refractive index ratio in the thickness direction of the film is 0965~
0.975. Preferably it is in the range of 0.940 to 0.970. If the refractive index ratio is smaller than the above range, the magnetic tape is likely to tear or crease during running, resulting in poor running characteristics.On the other hand, if the refractive index ratio is too low, Also, the running characteristics of the magnetic tape may become poor.
(3) フィルムの密度指数がOO1〜0.09 、
好ましくは、0.02〜0.08であること。密度指数
が上記範囲よシ小さい場合には記録の歪が犬きくなシや
すく、逆に密度指数が上記範囲よシ大きい場合には、磁
気テープが走行中に裂けたシするなどのトラブルを生じ
やすいし、走行特性不良となシやすい。(3) The density index of the film is OO1 to 0.09,
Preferably, it is 0.02 to 0.08. If the density index is smaller than the above range, the recording will be easily distorted. Conversely, if the density index is larger than the above range, problems such as the magnetic tape tearing during running may occur. It is easy to use, and it is easy to cause poor running characteristics.
なお9本発明におけるフィルムの厚さは特に限定される
ものではないが、12μ以下、好ましくは8μ以下であ
るのが望ましい。Although the thickness of the film in the present invention is not particularly limited, it is preferably 12μ or less, preferably 8μ or less.
次に1本発明の磁気記録材料の磁性層としては。Next, as for the magnetic layer of the magnetic recording material of the present invention.
特に限定されるものではなく、公知の磁性材料を用いた
層、であればいずれであってもよい。具体的には、たと
えばγ−Fe20. ・CrO,、Go”V−プの酸化
鉄、 Fe、 Co、 Niなどの金属、あるいはそれ
らの合金などを用いた層であるが、特に薄膜型の有機高
分子を実質的に含まない磁性層が好ましい。There is no particular limitation, and any layer using a known magnetic material may be used. Specifically, for example, γ-Fe20.・It is a layer using iron oxide such as CrO, Go''V-p, metals such as Fe, Co, Ni, or alloys thereof, but especially a thin film type magnetic layer that does not substantially contain organic polymers. is preferred.
次に本発明の磁気記録材料の製造法を説明するが、説明
を簡単にするために、ポリエステルとしてポリエチレン
ビスa、β−(2−クロルフェノ、キシ)エタン4,4
′−ジカルボキシレートを用いた場合を例にとって説明
する。Next, the manufacturing method of the magnetic recording material of the present invention will be explained. To simplify the explanation, polyesters such as polyethylene bis a, β-(2-chloropheno, xy) ethane 4,4
An explanation will be given by taking as an example a case in which '-dicarboxylate is used.
マス、ポリエチレンビスα、β−(2−クロルフェノキ
シ)エタン4.4′−ジカルボキシレートのペレットを
押出機に供給し、270−310’aでスリット状のダ
イ(T−ダイやサーキュラダイ)から溶融押出し、20
〜90°Cに冷却して固化せしめ、未延伸フィルムを作
る。この場合、均一に急冷するために静電印加キャスト
が有効である。次に、この未延伸フィルムを二軸延伸し
、配向せしめる。延伸方法としては、逐次二軸延伸法ま
たは同時二軸延伸法を用いることができるが、磁気テー
プとしての走行特性、記録の歪の点からは逐次二軸延伸
法が好ましい。逐次二軸延伸法の場合。Mass, pellets of polyethylene bis α, β-(2-chlorophenoxy) ethane 4,4'-dicarboxylate are fed to an extruder, and a slit-shaped die (T-die or circular die) is fed at 270-310'a. Melt extrusion from 20
Cool to ~90°C to solidify to form an unstretched film. In this case, electrostatic casting is effective for uniformly quenching. Next, this unstretched film is biaxially stretched and oriented. As the stretching method, a sequential biaxial stretching method or a simultaneous biaxial stretching method can be used, but the sequential biaxial stretching method is preferable from the viewpoint of running characteristics as a magnetic tape and recording distortion. In case of sequential biaxial stretching method.
長手方向9次いで幅方向の順に延伸するのが一般的であ
るが、この順序を逆にして延伸してもよい。Although it is common to stretch in the longitudinal direction and then in the width direction, this order may be reversed.
二軸延伸の条件は延伸方法、ポリマの粘度などによって
必ずしも一定ではないが9通常、長手方向。The conditions for biaxial stretching are not necessarily constant depending on the stretching method, the viscosity of the polymer, etc. 9 Usually, the conditions are in the longitudinal direction.
幅方向ともに105°C〜160°C2好ましくは11
5°0〜125°0の範囲の温度で、延伸倍率はそれぞ
れ1.5〜5.0倍、好ましくは2.0〜4.0倍とす
る。延伸速度は1×10〜7 x 10 %//;’)
−の範囲が適当である。また、いったん二軸延伸したフ
ィルムを少なくとも一方向にさらに延伸する方法は磁気
テープとしての走行特性をさらに向上させるのに有効で
ある。この場合の延伸条件としては。105°C to 160°C in both width directions, preferably 11
At a temperature in the range of 5°0 to 125°0, the stretching ratio is 1.5 to 5.0 times, preferably 2.0 to 4.0 times. Stretching speed is 1 x 10~7 x 10%//')
- range is appropriate. Furthermore, a method of further stretching the biaxially stretched film in at least one direction is effective in further improving the running characteristics of the magnetic tape. In this case, the stretching conditions are as follows.
延伸温度は110°C〜190℃の範囲の温度で。The stretching temperature is in the range of 110°C to 190°C.
延伸倍率は長手方向0幅方向ともに1.1〜6.5倍。The stretching ratio is 1.1 to 6.5 times in both the longitudinal and width directions.
好ましくは1.4〜3.0倍である(ただし、たとえば
長手方向にのみさらに延伸する場合は、当然。Preferably it is 1.4 to 3.0 times (however, of course, when further stretching is performed only in the longitudinal direction, for example.
幅方向の延伸倍率は1となる)。The stretching ratio in the width direction is 1).
次に必要に応じて、この延伸フィルムを熱処理すること
もできる。この場合の熱処理条件とじては、温度200
′c〜260°C2好ましくは220°C〜245°C
で1時間0.5−120秒間、好ましくは1.0〜60
秒間が適当である。Next, if necessary, this stretched film can be heat treated. In this case, the heat treatment conditions are as follows:
'c~260°C2 preferably 220°C~245°C
for 1 hour 0.5-120 seconds, preferably 1.0-60
Seconds is appropriate.
かくして得られた基材用ポリエステルフィルム上へ磁性
層を形成させる。その形成方法は公知の各種方法が採用
できる。たとえば、γ−Fe20.・”r201 +
coドープの酸化鉄、 Fe、 Ni、 Co
などの、金属ならびにこれらの合金の粉末を適当な高分
子バインダーとともに溶媒に溶かした溶液を塗布する方
法、あるいは、所定の金属をスパッタリング法、蒸着法
、イオンブレーティング法などによって、直接形成せし
める方法でもよい。また上記の磁性層形成を施す前に、
基材となるポリエステルフィルムに、公知のコロナ放電
処理(空気中、窒素中、炭酸ガス中など)を施してもよ
いし、また接着性、滑性1表面滑性などを付与する目的
で他種のポリマを積層したり、他種組成物で被覆した形
で用いてもよい。A magnetic layer is formed on the thus obtained polyester film for base material. Various known methods can be used for its formation. For example, γ-Fe20.・"r201 +
Co-doped iron oxide, Fe, Ni, Co
A method in which a solution of powders of metals and their alloys, such as, dissolved in a solvent together with a suitable polymeric binder, is applied, or a method in which a specified metal is directly formed by sputtering, vapor deposition, ion blating, etc. But that's fine. Also, before forming the above magnetic layer,
The polyester film serving as the base material may be subjected to a known corona discharge treatment (in air, nitrogen, carbon dioxide, etc.), or may be treated with other types for the purpose of imparting adhesion and surface lubricity. These polymers may be laminated or coated with other types of compositions.
なお9本発明は上記磁気記録材料を特徴とするものであ
るが1本発明の基材となるフィルムのポリエステルの構
成単位のうち15モル係未満であれば他の共重合成分を
含んでいてもよい。この場合の共重合成分としては、テ
レフタル酸、イソフタル酸、ナフタレンジカルボン酸@
4.4’−ビフェニルジカルボン酸、ビスα、β−(フ
ェノキシ)エタン4.4′−ジカルボン酸などのジカル
ボン酸類。Note that although the present invention is characterized by the above-mentioned magnetic recording material, it may contain other copolymer components as long as it is less than 15 molar proportion of the polyester constituent units of the film serving as the base material of the present invention. good. In this case, the copolymerization components include terephthalic acid, isophthalic acid, naphthalene dicarboxylic acid@
Dicarboxylic acids such as 4.4'-biphenyldicarboxylic acid, bis α, β-(phenoxy)ethane 4.4′-dicarboxylic acid.
あるいは° °−’ 1.4−シクロヘキサ
ンジメタツールなどのジオキシ化合物が一般的である。Alternatively, dioxy compounds such as ° °-' 1,4-cyclohexane dimetatool are common.
また1本発明の基材となるポリエステルフィルム種ポリ
マがブレンドされていてもよいし,また酸常の量程度添
加されていてもよい。Further, the polyester film type polymer serving as the base material of the present invention may be blended or may be added in a normal amount.
本発明の特性値は,次の測定法,評価基準によるもので
ある。The characteristic values of the present invention are based on the following measurement method and evaluation criteria.
(1) フィルムのヤング率
:rxsーzー1702に規定された方法にしたがって
,インストロンタイプの引張試験機を用いて25℃86
5チRHにて測定した。(1) Young's modulus of film: Tested at 25°C and 86°C using an Instron type tensile tester according to the method specified in RXS-Z-1702.
The measurement was performed at 5 RH.
(2) フィルムの熱収縮率
試料フィルムを幅10mm、長さ250mmに切り出し
、約200mmの間隔で2本の標線を入れ。(2) Heat shrinkage rate of film Cut a sample film to a width of 10 mm and a length of 250 mm, and insert two marked lines at an interval of about 200 mm.
その間隔を正確に測定する(これをAmmとする)。Accurately measure the distance (this is defined as Amm).
この試料の先端に30gの荷重をかけた状態で150℃
の熱風オーブン中に60分間放置したのちの標線間の間
隔を測定しくこれをBrnmとする) 、 100x
(A−B)/A をもって熱収縮率とした。150℃ with a load of 30g applied to the tip of this sample.
After leaving it in a hot air oven for 60 minutes, measure the distance between the marked lines and call it Brnm), 100x
(A-B)/A was defined as the heat shrinkage rate.
(3) フィルムの固有粘度
0−クロルフェノール中、25°Cで測定した相対粘度
の値から求めた。(3) Intrinsic viscosity of film This was determined from the relative viscosity measured in 0-chlorophenol at 25°C.
(4)厚さ方向屈折率および屈折率比
ナトリウムD線(波長589nm)を光源としてアツベ
屈折率計を用いて、ニー
″ 三軸配向フィ
ルムの厚さ方向の屈折率(Aとする)および溶融プレス
後10℃の水中へ急冷して作った無配向(アモルファス
)フィルムの厚さ方向の屈折率(Bとする)を測定し、
A/Bをもって厚さ方向屈折率比とした。マウント液に
はヨウ化メチレンを用い、25”C165%RHにて測
定した。(4) Thickness direction refractive index and refractive index ratio Using an Atsube refractometer with sodium D line (wavelength 589 nm) as a light source, the thickness direction refractive index (referred to as A) of the knee'' triaxially oriented film and the melting After pressing, the refractive index (referred to as B) in the thickness direction of a non-oriented (amorphous) film made by rapidly cooling it in water at 10 ° C. was measured,
A/B was defined as the refractive index ratio in the thickness direction. Methylene iodide was used as the mounting solution, and the measurement was performed at 25"C165%RH.
(5) フィルムの密度および密度指数四塩化炭素とn
−へブタンからなる密度勾配管を用いて、二軸配向フィ
ルムの密度(ρとする)および溶融プレス後10°Cの
水中へ急冷して作った無配向(アモルファス)フィルム
の密度(ρ。とする)を測定し、ρ−ρ。をもって密度
指数とした。なお測定は25゛Cにて行なった。(5) Film density and density index carbon tetrachloride and n
- Using a density gradient tube made of hebutane, the density (rho) of a biaxially oriented film and the density (rho) of an unoriented (amorphous) film made by melt-pressing and then quenching into 10°C water are determined. ) and ρ−ρ. This was taken as the density index. Note that the measurements were performed at 25°C.
(6)磁気テープの走行特性
試料磁気テープを市販家庭用ビデオテープレコーダで走
行開始、停止を繰シ返しながら走行状態を調べ、エッヂ
折れ(ワカメ状など)やテープ裂けなどをおこさずスム
ーズに走行した場合は走行特性良好、エッヂ折れやテー
プ裂けなどを生じた場合は走行特性不良と判定した。(6) Running characteristics of magnetic tape A sample magnetic tape was repeatedly started and stopped using a commercially available home video tape recorder to check its running condition, and it was found to run smoothly without edge bending (wakame-like) or tape tearing. If this occurred, it was determined that the running characteristics were good, and if edge bending or tape tearing occurred, it was determined that the running characteristics were poor.
(力 記録の歪 上記ビデオテープレコーダを用いて、20℃。(Distortion of power records) 20°C using the video tape recorder described above.
60%RHにて、試料磁気テープに垂直線画像を記録す
る。これを60″0.60%RHにて10時間連連続桁
させたのち、20℃、60%RHにて再生を行ない、テ
レビ最下端部での垂直基準線と画像のずれ(スキューと
いう)を測定した。A vertical line image is recorded on the sample magnetic tape at 60% RH. After digitizing this continuously for 10 hours at 60'' at 0.60% RH, we played it back at 20°C and 60% RH to check for the deviation (referred to as skew) between the vertical reference line and the image at the bottom of the TV. It was measured.
スキューが10μsec以下の場合は記録の歪なし、1
0μ secより大きい場合は記録の歪ありと判定した
。If the skew is 10μsec or less, there is no recording distortion, 1
If it was longer than 0 μsec, it was determined that there was distortion in the recording.
゛(本発明は上述したように、特定のポリエステルから
なる特定の物性を有する二軸配向フィルムの少なくとも
片面に磁性層を設けた磁気記録材料としたので1次のご
ときすぐれた効果を得ることができたものである。すな
わち。(As mentioned above, the present invention is a magnetic recording material in which a magnetic layer is provided on at least one side of a biaxially oriented film made of a specific polyester and having specific physical properties, so it is possible to obtain excellent effects such as first order. It is a finished product, i.e.
(1) 薄くても、走行特性が良好で、かつ、記録に
全く歪の生じない磁気記録材料となシ、その結果、磁気
記録材料の薄膜化、小型化、高密度化が可能となる。(1) Even if it is thin, the magnetic recording material has good running characteristics and does not cause any distortion in recording. As a result, the magnetic recording material can be made thinner, smaller, and more dense.
(2) 基材フィルムと磁性層との接着性にすぐれた
磁気記録材料となり、その結果記録の歪が全く生じない
磁気記録材料となる。(2) A magnetic recording material with excellent adhesion between the base film and the magnetic layer is obtained, and as a result, a magnetic recording material is obtained in which no distortion occurs in recording.
本発明の磁気記録材料は、オーディオ、ビデオなどあら
ゆる磁気記録用に用いることができるが。The magnetic recording material of the present invention can be used for all types of magnetic recording such as audio and video.
次に実施例にもとづいて本発明の実施態様を説明する。Next, embodiments of the present invention will be described based on Examples.
実施例1
固有粘度0.7のポリエチレンビスα、β−(2−クロ
ルフェノキシ)エタン4.4′−ジカルボキシ(jOm
mφ)に供給して、300′aで溶融押出し。Example 1 Polyethylene bisα,β-(2-chlorophenoxy)ethane 4.4′-dicarboxy(jOm
mφ) and melt extruded at 300'a.
これを表面温度60°Cのキャスティングドラムに巻き
つけて冷却固化し、厚さ約60μmの未延伸フィルムを
作った。この未延伸フィルムf T、M、 Lo−ng
社製のフィルムストレッチャーを用いて。This was wound around a casting drum with a surface temperature of 60°C and cooled and solidified to produce an unstretched film with a thickness of about 60 μm. This unstretched film f T, M, Long
using a film stretcher made by the company.
120℃にて、長手方向0幅方向ともに62倍ずつ、延
伸速度3,000%/分で同時二軸延伸し、直ちに22
0°Cで60秒間定長下に熱処理した。こうして得られ
た二軸配向フィルムは下記物性を示した。Simultaneous biaxial stretching was carried out at 120° C. by 62 times in both the longitudinal and width directions at a stretching speed of 3,000%/min, and immediately 22 times
Heat treatment was performed at 0°C for 60 seconds under constant length. The biaxially oriented film thus obtained exhibited the following physical properties.
このフィルムに、磁性層としてCo−Ni合金を阪厚さ
11口00Aになるように電子ビーム蒸着法にて形成せ
しめ、磁気テープとした。このテープは6μmという薄
さにもかかわらず、走行特性は良好であシ、記録の歪も
全くなく、すぐれた磁気テープとしての特性を有してい
た。A Co--Ni alloy was formed as a magnetic layer on this film by electron beam evaporation to a thickness of 11 00A to obtain a magnetic tape. Although this tape was as thin as 6 .mu.m, it had good running characteristics and no recording distortion, and had excellent characteristics as a magnetic tape.
実施例2.比較例1〜5
実施例1のポリマ組成物から、実施例1と同様にして厚
さ約65μmの未延伸フィルムを作った。Example 2. Comparative Examples 1 to 5 From the polymer composition of Example 1, unstretched films having a thickness of about 65 μm were made in the same manner as in Example 1.
この未延伸フィルムを、ロールを用いて延伸速度50.
000%/分で120°OKて長手方向に6.2倍延伸
し9次いでステンタを用いて延伸速度5,000%/分
で120°Cにて幅方向に64倍延伸したのち。This unstretched film was stretched at a stretching speed of 50.
The film was stretched 6.2 times in the longitudinal direction at 120 degrees OK at 000%/min, and then stretched 64 times in the width direction at 120°C at a stretching speed of 5,000%/min using a stenter.
直ちに230°Cにて定長下に60秒間熱処理した。Immediately, heat treatment was performed at 230°C for 60 seconds at a constant temperature.
このフィルムは第1表に示したような物性を示し。This film exhibited the physical properties shown in Table 1.
このフィルムに実施例1と同様の方法で磁性層を設けた
磁気テープは、同表に示したとおり、6μmという薄さ
にもかかわらず走行特性が良好で、かつ、記録に全く歪
の生じないすぐれたものであった。しかし1本発明外で
は、第1表に示したように、走行特性が良好で、かつ、
記録の歪を生じないものは得られなかった。As shown in the table, the magnetic tape in which a magnetic layer was provided on this film in the same manner as in Example 1 had good running characteristics despite being as thin as 6 μm, and there was no distortion at all in recording. It was excellent. However, as shown in Table 1, other than the present invention, the running characteristics are good, and
It was not possible to obtain anything that would not cause distortion of the record.
手 続 補 正 書
1、事件の表示
昭和57年特許願第148103号
2、発明の名称
磁気記録材料
3、補正をする者
事件との関係 特許出願人
4、補正命令の日付
自発
6、補正の対象
明細書の「発明の詳細な説明」の欄
7、補正の内容
(1〉 明細書 第10頁19行目
r1702に」をM 702また【よASTM−D−8
82に」と補正する。Procedures Amendment 1, Indication of the case Patent Application No. 148103 of 1982, Name of the invention Magnetic Recording Materials 3, Person making the amendment Relationship to the case Patent applicant 4, Date of amendment order Voluntary 6, Amendment In Column 7 of "Detailed Description of the Invention" of the subject specification, the content of the amendment (1> Specification, page 10, line 19, r1702) M 702 and [YO ASTM-D-8
82.”
Claims (1)
含むポリエステルからなり、少なくとも一方向のヤング
率が550 z/mm ’以上、該方向の熱収縮率が4
%以下である二軸配向ポリエステルフ、イルムの少なく
とも片面に磁性層を設けたことを特徴とする磁気記録材
料。 ここで、Xはフッ素、塩素、臭素の中から選ばれるハロ
ゲン基または炭素数1〜乙のアルキル基。 1、mはそれぞれ1〜2の整数、pは2〜6の整数、q
ば2〜4の整数である。[Claims] Consisting of polyester containing 85 or more moles of repeating units represented by the following general formula, having a Young's modulus in at least one direction of 550 z/mm' or more and a heat shrinkage rate of 4 in that direction.
1. A magnetic recording material characterized in that a magnetic layer is provided on at least one side of a biaxially oriented polyester film having a biaxially oriented polyester film having a biaxially oriented polyester film. Here, X is a halogen group selected from fluorine, chlorine, and bromine, or an alkyl group having 1 to 2 carbon atoms. 1 and m are each an integer of 1 to 2, p is an integer of 2 to 6, q
is an integer from 2 to 4.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57148103A JPS5938925A (en) | 1982-08-26 | 1982-08-26 | Magnetic recording material |
DE8383108292T DE3378727D1 (en) | 1982-08-26 | 1983-08-23 | Magnetic recording material |
EP19830108292 EP0102581B1 (en) | 1982-08-26 | 1983-08-23 | Magnetic recording material |
US06/526,773 US4539260A (en) | 1982-08-26 | 1983-08-26 | Magnetic recording material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57148103A JPS5938925A (en) | 1982-08-26 | 1982-08-26 | Magnetic recording material |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5938925A true JPS5938925A (en) | 1984-03-03 |
JPH0157414B2 JPH0157414B2 (en) | 1989-12-05 |
Family
ID=15445305
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP57148103A Granted JPS5938925A (en) | 1982-08-26 | 1982-08-26 | Magnetic recording material |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5938925A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6264545A (en) * | 1985-05-29 | 1987-03-23 | 帝人株式会社 | Polyester film for metallic thin-film magnetic record medium |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS491795A (en) * | 1972-04-25 | 1974-01-09 | ||
JPS4959176A (en) * | 1972-10-09 | 1974-06-08 | ||
JPS508869A (en) * | 1973-05-28 | 1975-01-29 |
-
1982
- 1982-08-26 JP JP57148103A patent/JPS5938925A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS491795A (en) * | 1972-04-25 | 1974-01-09 | ||
JPS4959176A (en) * | 1972-10-09 | 1974-06-08 | ||
JPS508869A (en) * | 1973-05-28 | 1975-01-29 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6264545A (en) * | 1985-05-29 | 1987-03-23 | 帝人株式会社 | Polyester film for metallic thin-film magnetic record medium |
JPH0433273B2 (en) * | 1985-05-29 | 1992-06-02 | Teijin Ltd |
Also Published As
Publication number | Publication date |
---|---|
JPH0157414B2 (en) | 1989-12-05 |
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