JPS5821330B2 - Jikiki Loc Tape - Google Patents
Jikiki Loc TapeInfo
- Publication number
- JPS5821330B2 JPS5821330B2 JP49082629A JP8262974A JPS5821330B2 JP S5821330 B2 JPS5821330 B2 JP S5821330B2 JP 49082629 A JP49082629 A JP 49082629A JP 8262974 A JP8262974 A JP 8262974A JP S5821330 B2 JPS5821330 B2 JP S5821330B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic recording
- tape
- jikiki
- carbon black
- coating film
- 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.)
- Expired
Links
Landscapes
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Description
【発明の詳細な説明】
本発明は巻き取りの改善された磁気記録テープに関する
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording tape with improved winding.
一般に、磁気記録テープは比較的大きな電気抵抗を有し
、しかも磁性層の表面が平滑に仕上げであるために高速
で早送りあるいは巻戻しを行なうと摩擦による帯電ある
いはテープの巻回層内への空気の巻き込みなどによって
テープ巻回体の側端に凹凸を生じ、いわゆる巻乱れを生
じる。In general, magnetic recording tapes have a relatively high electrical resistance, and the surface of the magnetic layer is finished smooth, so when fast forwarding or rewinding at high speeds, static electricity builds up due to friction or air enters the wound layer of the tape. The winding of the tape causes unevenness on the side edges of the tape roll, resulting in so-called winding disorder.
その結果、テープに伸び変形を生じて、ドロップアウト
、出力変動を生じる一因となっている。As a result, the tape is stretched and deformed, which is one of the causes of dropouts and output fluctuations.
そのため、従来、磁性層と反対側の基体フィルム面にカ
ーボンブラックなどを混入した塗膜を設け、常に整然と
巻き取りを行なうようにした磁気記録テープが開発され
ている。For this reason, magnetic recording tapes have been developed in which a coating film containing carbon black or the like is provided on the surface of the base film opposite to the magnetic layer so that the tape can be wound in an orderly manner at all times.
しかしながら、この種の塗膜で使用されているバインダ
ー、例えば塩ビー酢ビ系共重合体などのものは、耐摩耗
性および耐湿熱性が悪く、磁気記録テープを反復使用し
ているうちに、この塗膜が）摩耗し、その摩耗した粉末
が磁性層に付着したり、あるいはこの塗膜と磁性層が粘
着するなどして、ドロップアウトや出力変動を生じ、そ
の効果を充分発揮することができなかった。However, binders used in this type of coating, such as vinyl chloride-vinyl acetate copolymers, have poor abrasion resistance and moist heat resistance, and as magnetic recording tapes are used repeatedly, When the paint film wears out, the worn powder adheres to the magnetic layer, or the paint film and magnetic layer stick together, causing dropouts and output fluctuations, making it impossible to fully demonstrate its effectiveness. There wasn't.
本発明は、かかる従来の欠点に鑑みてなされた、もので
、前記塗膜として耐摩耗性および耐湿熱性に優れたもの
を具備する磁気記録テープを得ることを目的としたもの
である。The present invention was made in view of these conventional drawbacks, and an object of the present invention is to obtain a magnetic recording tape having the coating film excellent in abrasion resistance and heat-and-moisture resistance.
本発明者らは、種々研究した結果、エポキシ樹脂と熱可
塑性ポリウレタンエラストマーとポリイ）ソシアネート
からなり、その配合比が重量比で１対８．５対０，５か
ら２１対７．１対０．８のバインダー中にカーボンブラ
ック粉末を主体とした充填剤を混練した塗膜を基体フィ
ルムの磁性層と反対側に塗着することによってすぐれた
耐摩耗性および耐湿熱性を有する塗膜が得られ、出力変
動、ドロップアウトなどが著るしく少なくなることを発
見し、これにもとずいて本発明を完成したものである。As a result of various studies, the present inventors found that the composition is composed of an epoxy resin, a thermoplastic polyurethane elastomer, and a polyisocyanate, and the weight ratio thereof ranges from 1:8.5:0.5 to 21:7.1:0. By applying a coating film obtained by kneading a filler mainly composed of carbon black powder in the binder of No. 8 to the side opposite to the magnetic layer of the base film, a coating film having excellent abrasion resistance and heat-and-moisture resistance can be obtained. It was discovered that output fluctuations, dropouts, etc. were significantly reduced, and the present invention was completed based on this discovery.
この場合、熱可塑性ポリウレタンエラストマーの配合量
を増すと柔軟性が増し、一方エポキシ樹脂およびポリイ
ソシアネートの配合量を増すと硬質のものが得られる。In this case, increasing the amount of thermoplastic polyurethane elastomer added increases flexibility, while increasing the amount of epoxy resin and polyisocyanate makes it harder.
本発明では、塗膜に良好な電導性と適度の表面粗さを付
与するためにカーボンブラックを主体とした充填剤が混
入されるが、この充填剤の前記バ、インダーとの混合割
合は、重量比で３５／６５〜６５／３５の範囲内が好ま
しい。In the present invention, a filler mainly composed of carbon black is mixed in order to impart good conductivity and appropriate surface roughness to the coating film, but the mixing ratio of this filler with the above-mentioned bar and inder is The weight ratio is preferably within the range of 35/65 to 65/35.
エポキシ樹脂の代表例としてはシェル石油化学社製エピ
コート（Ｅｐｉｋｏｔｅ）１００１．１００４１００７
（商品名バ大日本インキ社製エピクロン８００，１０１
０，１０００，３０１０（商品名）などがある。A typical example of epoxy resin is Epikote 1001.10041007 manufactured by Shell Petrochemicals.
(Product name: Epicron 800, 101 manufactured by Dainippon Ink Co., Ltd.
0, 1000, 3010 (product name), etc.
熱可塑性ポリウレタンエラストマーとしては、グツドリ
ッチ社製ニステン（Ｅｓｔａｎｅ ） ５７０１ 。As the thermoplastic polyurethane elastomer, Estane 5701 manufactured by Gudrich Co., Ltd. is used.
５７０２．５７１４，５７１５（商品名）、大日本イン
キ社製りリスボン７２１６ＥＬ、７６６７ＥＬ。5702, 5714, 5715 (product name), manufactured by Dainippon Ink Co., Ltd. Lisbon 7216EL, 7667EL.
５５１６ＥＬ（商品名）、日本ポリウレタン社説パラプ
レンフィニツシユ８８、パラプレンペレット２２Ｓ、２
５Ｓ、２６Ｓ（商品名）などがある。5516EL (product name), Japan Polyurethane Editorial Paraprene Finish 88, Paraprene Pellets 22S, 2
There are 5S, 26S (product name), etc.
ポリイソシアネートとしては、２４トリレンジイソシア
ネート、４．４’−ビフエンレンジイソシアネー１−１
１．６−へキサメチレンジイソシアネートなどの１〜３
量体、あるいは日本ポリウレタン社製コロネー１−Ｌ（
商品名）、大日本インキ社製Ｎ−１８９（商品名）など
が使用できる。As the polyisocyanate, 24 tolylene diisocyanate, 4,4'-biphelene diisocyanate 1-1
1-3 such as 1.6-hexamethylene diisocyanate
or Coronae 1-L (made by Nippon Polyurethane Co., Ltd.)
(trade name), N-189 (trade name) manufactured by Dainippon Ink Co., Ltd., etc. can be used.
さらに充填剤としては、アセチレンブラック、ファーネ
スドブラックなどのカーボンブラックの他に５１０２
、ＡＣ２０３，Ｆｅ２ｏ、３．ＴｌＯ２、ＣａＯ、。Furthermore, as a filler, in addition to carbon black such as acetylene black and furnaced black, 5102
, AC203, Fe2o, 3. TlO2, CaO,.
Ｃａ ＣＯｓ ｔ Ｍｇ Ｏ、Ｚ ｎ Ｏなどの無機質
粉末を上記カーボンブラックとともに混合して塗膜の表
面粗さあるいは電気抵抗を適当に調節することができる
。The surface roughness or electrical resistance of the coating film can be adjusted appropriately by mixing an inorganic powder such as CaCOs t Mg O or Z n O with the carbon black.
なお、この塗膜の厚みは通常１〜５μが推奨される。In addition, the thickness of this coating film is usually recommended to be 1 to 5 μm.
次に、本発明の実施例について説明する。Next, examples of the present invention will be described.
実施例
エピコート１００７ ３０重量部バラプレ
ンペレット２６８ １００／／コロネートＬ
１０ｔｔ３カーボンブラツク
１００ 〃テトラヒドロフラン ６
００ 〃ジメチルホルムアミド ６００ 〃こ
の組成物を１０〜３０時間ボールミル中で混練した後表
面に磁性層を有するポリエステル基体ｊフィルムの裏面
に乾燥後の厚みが２〜４μとなるように塗布し所定の幅
に裁断して磁気記録テープを作る。Example Epikote 1007 30 parts by weight Bularprene pellets 268 100//Coronate L
10tt3 carbon black
100 Tetrahydrofuran 6
00〃Dimethylformamide 600〃This composition was kneaded in a ball mill for 10 to 30 hours, and then coated on the back side of a polyester base film having a magnetic layer on the surface so that the thickness after drying was 2 to 4μ, and then spread to a predetermined width. Cut into pieces to make magnetic recording tape.
比較例 １
実施例の組成物中、エピコー）１００７を除き４以下同
様にして磁気記録テープを作る。Comparative Example 1 A magnetic recording tape was prepared in the same manner as in Example 4 except for Epicor 1007.
比較例 ２
実施例の組成物中コロネートＬを除き以下同様にして磁
気記録テープを作る。Comparative Example 2 A magnetic recording tape was prepared in the same manner as in Example 2 except for Coronate L in the composition.
比較例 ３
実施例の組成物中、パラプレン２６８を除き以下同様に
して磁気記録テープを作る。Comparative Example 3 A magnetic recording tape was prepared in the same manner as in the composition of Example except for excluding Paraprene 268.
比較例 ４
エポキシ樹脂 ４３重量部ポリウレ
タンエラストマー ６６重量部ポリアミド樹脂
３１重量部カーボンブラック
１００ 〃テトラヒドロフラン ６
００ 〃ジメチルホルムアミド ６００ 〃上
記組成で実施例と同様にして磁気記録テープを作る。Comparative Example 4 Epoxy resin 43 parts by weight Polyurethane elastomer 66 parts by weight Polyamide resin
31 parts by weight carbon black
100 Tetrahydrofuran 6
00 Dimethylformamide 600 A magnetic recording tape was prepared using the above composition in the same manner as in the example.
実施例および各比較例ならびにバインダーとして塩ビー
酢ビ系共重合体を用いた従来の磁気記録テープを試験の
ため高速で巻き取り、巻戻し操作を１００回繰り返えし
、その後出力変動を測定し、塗膜の摩耗状態を観察した
。Examples and comparative examples, as well as conventional magnetic recording tapes using a vinyl chloride-vinyl acetate copolymer as a binder, were wound at high speed for testing, the unwinding operation was repeated 100 times, and then the output fluctuation was measured. The wear condition of the paint film was then observed.
また、上記磁気記録テープをガラス管に約１ｋｆの張力
で巻回し、６０℃、８０４ＰＨで２４時間保存し、しか
る後室温まで放冷してその粘着性の有無を試験した。Further, the above magnetic recording tape was wound around a glass tube with a tension of about 1 kf, stored at 60° C. and 804 PH for 24 hours, and then allowed to cool to room temperature to test the presence or absence of stickiness.
下表は、その結果である。The table below shows the results.
上表から明らかなように、比較例で示すもの鴫出力変動
、耐摩耗性、粘着性のうちどれか一つ欠点を有する力線
発明のものは上記三特性について良好な結果を示しより
実用的であることが理解できる。As is clear from the above table, the comparative example shows good results in terms of the above three properties and is more practical than the one shown in the comparative example, which has one defect among output fluctuation, abrasion resistance, and adhesiveness. It is understandable that
Claims (1)
とポリイソシアネートからなり、その配合比が重量比で
１対８．５対０．５から２１対７．１対０．８のバイン
ダーとカーボンブラック粉末を主体とした充填剤を混練
した塗膜を基体フィルムの磁性層と反対側に塗着したこ
とを特徴とする磁気記録テープ。1 Consists of epoxy resin, thermoplastic polyurethane elastomer, and polyisocyanate, with a weight ratio of 1:8.5:0.5 to 21:7.1:0.8, mainly consisting of a binder and carbon black powder. A magnetic recording tape characterized in that a coating film kneaded with a filler is applied to the side of a base film opposite to the magnetic layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP49082629A JPS5821330B2 (en) | 1974-07-17 | 1974-07-17 | Jikiki Loc Tape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP49082629A JPS5821330B2 (en) | 1974-07-17 | 1974-07-17 | Jikiki Loc Tape |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5110908A JPS5110908A (en) | 1976-01-28 |
| JPS5821330B2 true JPS5821330B2 (en) | 1983-04-28 |
Family
ID=13779730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP49082629A Expired JPS5821330B2 (en) | 1974-07-17 | 1974-07-17 | Jikiki Loc Tape |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5821330B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6034167B2 (en) * | 1978-09-11 | 1985-08-07 | 富士写真フイルム株式会社 | magnetic recording medium |
| JPS57158037A (en) * | 1981-03-24 | 1982-09-29 | Fuji Photo Film Co Ltd | Magnetic recording medium and its manufacture |
| JPS57212622A (en) * | 1981-06-24 | 1982-12-27 | Matsushita Electric Ind Co Ltd | Magnetic recording medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4825923A (en) * | 1971-08-11 | 1973-04-04 | ||
| JPS4917203A (en) * | 1972-06-02 | 1974-02-15 |
-
1974
- 1974-07-17 JP JP49082629A patent/JPS5821330B2/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4825923A (en) * | 1971-08-11 | 1973-04-04 | ||
| JPS4917203A (en) * | 1972-06-02 | 1974-02-15 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5110908A (en) | 1976-01-28 |
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