JPH03245385A - Magnetic tape cartridge - Google Patents
Magnetic tape cartridgeInfo
- Publication number
- JPH03245385A JPH03245385A JP3974690A JP3974690A JPH03245385A JP H03245385 A JPH03245385 A JP H03245385A JP 3974690 A JP3974690 A JP 3974690A JP 3974690 A JP3974690 A JP 3974690A JP H03245385 A JPH03245385 A JP H03245385A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic tape
- resin
- guide roller
- tape cartridge
- sno2
- 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
- 229920005989 resin Polymers 0.000 claims abstract description 13
- 239000011347 resin Substances 0.000 claims abstract description 13
- 229920013716 polyethylene resin Polymers 0.000 claims abstract description 6
- -1 polyethylene terephthalate Polymers 0.000 claims abstract description 6
- 229920000139 polyethylene terephthalate Polymers 0.000 claims abstract description 6
- 239000005020 polyethylene terephthalate Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 5
- 229920000915 polyvinyl chloride Polymers 0.000 claims abstract description 5
- 239000004800 polyvinyl chloride Substances 0.000 claims abstract description 5
- 239000002245 particle Substances 0.000 claims description 3
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 abstract description 14
- 230000005611 electricity Effects 0.000 abstract description 3
- 230000003068 static effect Effects 0.000 abstract description 3
- 239000004698 Polyethylene Substances 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 229920000573 polyethylene Polymers 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 239000011342 resin composition Substances 0.000 description 2
- 229930182556 Polyacetal Natural products 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、帯電防止性を改善したガイドローラを具備す
る磁気テープカートリッジに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic tape cartridge equipped with a guide roller having improved antistatic properties.
磁気テープカートリッジは、樹脂製のケース内に設けら
れた一対のハブに磁気テープを巻き出し巻き取り可能に
収納し、そのままの状態で記録・再生機に装着してテー
プを走行させ、そのテープを両側ハブの中間でケース表
面に露出させて磁気−・ノドに擦らせ記録、再生するも
のである。この際テープは走行しながら磁気ヘッドに正
しく擦られる必要がある。そのため、ケース前面に位置
させてケース内に一対のガイドローラを設け、テープの
裏面をこれらに接触させてどちら側のハブから巻き出さ
れたテープでもこれを前面にガイドさせている。A magnetic tape cartridge stores a magnetic tape in a pair of hubs installed in a resin case so that it can be unwound and reeled out, and is then inserted into a recording/playback machine to run the tape. It is exposed on the case surface between the hubs on both sides and is rubbed by a magnetic node for recording and playback. At this time, the tape needs to be properly rubbed by the magnetic head while running. For this reason, a pair of guide rollers are provided inside the case at the front of the case, and the back surface of the tape is brought into contact with these rollers so that the tape unwound from either hub is guided to the front surface.
このガイドローラは、従来、ポリアセタール樹脂又はポ
リアミド樹脂を材質にしたものが用いられている。Conventionally, this guide roller is made of polyacetal resin or polyamide resin.
しかしながら、磁気テープはポリエチレンテレフタレー
トフィルムの表面に磁性層を形成したものであるため、
磁気テープが走行しながらその裏面がガイドローラに接
触してから離れるときに、材質の大きく異なる２物体間
に静電気が発生し、テープの走行安定性を害し、ビデオ
テープの場合にはドロップアウト、ノイズ発生等の原因
になり、磁気テープの特性を劣化させる。However, since magnetic tape is made by forming a magnetic layer on the surface of polyethylene terephthalate film,
When the back side of a magnetic tape comes into contact with a guide roller and then separates from the guide roller as it runs, static electricity is generated between two objects made of vastly different materials, impairing the running stability of the tape and causing dropouts and dropouts in the case of video tapes. This causes noise generation, etc., and deteriorates the characteristics of the magnetic tape.
〔課題を解決するための手段３
本発明は、上記課題を解決するために、ポリエチレン樹
脂、硬質ポリ塩化ビニル樹脂又はポリエチレンテレフタ
レート樹脂１００重量部に対し５ｎｏ２を１〜１０Ｍ量
部含有する材料から成形されたガイドローラを有する磁
気テープカートリッジを提供するものである。この際、
ＳｎＯ２の平均粒径が０．０２μｍ〜０．５μｍである
ことも好ましい。[Means for Solving the Problems 3] In order to solve the above-mentioned problems, the present invention provides a molded product made of a material containing 1 to 10 M parts of 5no2 per 100 parts by weight of polyethylene resin, hard polyvinyl chloride resin, or polyethylene terephthalate resin. The present invention provides a magnetic tape cartridge having a guide roller with a fixed shape. On this occasion,
It is also preferable that the average particle size of SnO2 is 0.02 μm to 0.5 μm.
ガイドローラの材質をＳｎＯを含有するポリエチレン樹
脂等にしたので、導電性が向上し磁気テープに擦られた
ときの帯電量を少なくでき、走行性を向上させることが
できる。Since the guide roller is made of a polyethylene resin containing SnO, it has improved conductivity, reduces the amount of charge when rubbed against the magnetic tape, and improves running performance.
次に本発明の詳細な説明する。 Next, the present invention will be explained in detail.
実施例１
ポリエチレン樹脂（商品名ＭＴ−２）にＳｎＯ２ （平
均粒径０．３μｍ）を５Ｎ量％含有する樹脂組成物を用
いてガイドローラを成形する。これとは別に樹脂製のケ
ースとハブを作製する。そして、ケースに上記ガイドロ
ーラを取りつけるとともに、ハブをケース内に装着して
磁気テープを巻装して磁気テープカートリンジを作製し
た。Example 1 A guide roller is molded using a resin composition containing 5N amount % of SnO2 (average particle size 0.3 μm) in polyethylene resin (trade name MT-2). Separately, a resin case and hub are manufactured. Then, the above-mentioned guide roller was attached to the case, and a hub was mounted inside the case and magnetic tape was wound thereon to produce a magnetic tape cartridge.
なお、この際使用した磁気テープは、Ｇｏ−γＦｅ２Ｑ
Ｈ（ＢＥＴ値３５ボ／ｇ）を磁性粉に用いた磁性塗料を
１１μｍのポリエチレンテレフタレートに塗布、乾燥さ
せて作製したＴＹＰＥ ＩＩ用オーディオテープである
。The magnetic tape used at this time was Go-γFe2Q.
This is an audio tape for TYPE II made by applying a magnetic paint using H (BET value 35 bo/g) as magnetic powder to 11 μm polyethylene terephthalate and drying it.
このようにして作製された磁気テープカートリッジを２
３℃、６０％相対湿度下に記録・再生機に装着して１０
０往復走行させたときの磁気テープの帯電量を測定した
結果を下記表に示す。また、１００往復磁気テープを走
行させた後のハブの巻き取りトルクを測定した。さらに
ドロップアウトカウンタにてドロップアウト数を測定し
た。これらの結果を下記表に示す。Two magnetic tape cartridges were prepared in this way.
Attached to the recording/playback machine at 3℃ and 60% relative humidity,
The table below shows the results of measuring the amount of charge on the magnetic tape when running 0 times back and forth. Further, the winding torque of the hub after running the magnetic tape 100 times back and forth was measured. Furthermore, the number of dropouts was measured using a dropout counter. These results are shown in the table below.
実施例２〜４
実施例１と同様にして、下記表のそれぞれの実施例の欄
に示す樹脂に対してＳｎＯ２をそれぞれに記す量を用い
てガイドローラを作製し、これらについても実施例１と
同様にして試験した結果を下記表に示す。Examples 2 to 4 In the same manner as in Example 1, guide rollers were manufactured using the resins shown in the respective Example columns of the table below and the amounts of SnO2 shown in each. The results of a similar test are shown in the table below.
比較例１〜２
実施例１において、ＳｎＯ２を使用しなかった以外は同
様にしてガイドローラを作製し、これについても実施例
１と同様にして試験した結果を下記表に示す。Comparative Examples 1 and 2 Guide rollers were produced in the same manner as in Example 1 except that SnO2 was not used, and the results of tests conducted in the same manner as in Example 1 are shown in the table below.
本発明によれば、磁気テープカートリンジのガイドロー
ラをＳｎＯ２を含有するポリエチレン樹脂等の樹脂組成
物から成形したので、例えば最大１７１３程度まで帯電
量を抑えることができ、その結果１００回走行後の静電
気による走行トルクの上昇も抑えることができ、ドロッ
プアウト数も例えば１７７程度にすることができる。According to the present invention, since the guide roller of the magnetic tape cartridge is molded from a resin composition such as polyethylene resin containing SnO2, the amount of charge can be suppressed to about 1713 at maximum, and as a result, after 100 runs, An increase in running torque due to static electricity can also be suppressed, and the number of dropouts can be reduced to about 177, for example.
平底２年２月２２日February 22nd, 2nd year
Claims (2)
ポリエチレンテレフタレート樹脂１００重量部に対しＳ
ｎＯ＿２を１〜１０重量部含有する材料から成形された
ガイドローラを有する磁気テープカートリッジ。(1) S per 100 parts by weight of polyethylene resin, hard polyvinyl chloride resin or polyethylene terephthalate resin
A magnetic tape cartridge having a guide roller molded from a material containing 1 to 10 parts by weight of nO_2.
ｍである請求項１記載の磁気テープカートリッジ。(2) SnO_2 has an average particle size of 0.02 μm to 0.5 μm
The magnetic tape cartridge according to claim 1, wherein the magnetic tape cartridge is m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3974690A JPH03245385A (en) | 1990-02-22 | 1990-02-22 | Magnetic tape cartridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3974690A JPH03245385A (en) | 1990-02-22 | 1990-02-22 | Magnetic tape cartridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03245385A true JPH03245385A (en) | 1991-10-31 |
Family
ID=12561529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3974690A Pending JPH03245385A (en) | 1990-02-22 | 1990-02-22 | Magnetic tape cartridge |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03245385A (en) |
-
1990
- 1990-02-22 JP JP3974690A patent/JPH03245385A/en active Pending
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