JPS6363725A - Biaxially oriented thermoplastic resin film - Google Patents
Biaxially oriented thermoplastic resin filmInfo
- Publication number
- JPS6363725A JPS6363725A JP20780986A JP20780986A JPS6363725A JP S6363725 A JPS6363725 A JP S6363725A JP 20780986 A JP20780986 A JP 20780986A JP 20780986 A JP20780986 A JP 20780986A JP S6363725 A JPS6363725 A JP S6363725A
- Authority
- JP
- Japan
- Prior art keywords
- thermoplastic resin
- film
- titanium dioxide
- biaxially oriented
- particles
- 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
- 229920005992 thermoplastic resin Polymers 0.000 title claims abstract description 23
- 239000002245 particle Substances 0.000 claims abstract description 41
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 19
- 239000010954 inorganic particle Substances 0.000 claims abstract description 18
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 14
- -1 polyethylene terephthalate Polymers 0.000 abstract description 12
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract description 8
- 239000000377 silicon dioxide Substances 0.000 abstract description 6
- 229920000139 polyethylene terephthalate Polymers 0.000 abstract description 5
- 239000005020 polyethylene terephthalate Substances 0.000 abstract description 5
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract description 4
- 238000005299 abrasion Methods 0.000 abstract description 3
- 239000005995 Aluminium silicate Substances 0.000 abstract description 2
- 235000012211 aluminium silicate Nutrition 0.000 abstract description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000454 talc Substances 0.000 abstract description 2
- 229910052623 talc Inorganic materials 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 239000011248 coating agent Substances 0.000 description 8
- 238000000576 coating method Methods 0.000 description 8
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000003068 static effect Effects 0.000 description 6
- 230000003746 surface roughness Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 239000004734 Polyphenylene sulfide Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 229920000069 polyphenylene sulfide Polymers 0.000 description 3
- WOZVHXUHUFLZGK-UHFFFAOYSA-N dimethyl terephthalate Chemical compound COC(=O)C1=CC=C(C(=O)OC)C=C1 WOZVHXUHUFLZGK-UHFFFAOYSA-N 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 1
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 1
- 244000089486 Phragmites australis subsp australis Species 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 235000011010 calcium phosphates Nutrition 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 239000012770 industrial material Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 125000005487 naphthalate group Chemical group 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 229910000349 titanium oxysulfate Inorganic materials 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 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、二軸配向熱可塑性樹脂フィルム、更に詳しく
は、耐摩耗性に優れた磁気テープ用ベースフィルムとし
て好適な二軸配向熱可塑性樹脂フィルムに関するもので
おる。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a biaxially oriented thermoplastic resin film, more specifically, a biaxially oriented thermoplastic resin suitable as a base film for a magnetic tape with excellent wear resistance. This is about film.
［従来の技術］
従来、二軸配向熱可塑性樹脂フィルムには、ハンドリン
グ性、易滑性をもたせるために、酸化チタン、シリカ、
炭酸カルシウム等の不活性物質を含有させておく手段が
知られている（例えば、特開昭５５−１３３４３１号公
報など）。[Prior Art] Conventionally, biaxially oriented thermoplastic resin films have been treated with titanium oxide, silica,
A method of containing an inert substance such as calcium carbonate is known (for example, JP-A-55-133431).
［発明が解決しようとする問題点］
しかしながら、磁気テープ用ベースフィルムに要求され
る耐摩耗性は、記録の高密度化に共ない、益々厳しくな
っているため、上述の如き従来の二軸配向熱可塑性樹脂
フィルムでは記録の脱落などが起り、品質的に十分とは
いえなかった。[Problems to be Solved by the Invention] However, the abrasion resistance required of base films for magnetic tapes is becoming more and more severe as recording density increases. With thermoplastic resin film, recordings sometimes fell off, and the quality was not sufficient.
本発明の目的は、かかる問題点を解消せしめ、耐摩耗性
に優れた磁気テープ用ベースフィルムとして好適な二軸
配向熱可塑性樹脂フィルムを提供せんとするものである
。An object of the present invention is to solve these problems and provide a biaxially oriented thermoplastic resin film suitable as a base film for magnetic tapes with excellent abrasion resistance.
［問題点を解決するための手段］
本発明は、二酸化チタンにより被覆された平均粒径０，
０３〜３μｍの無機粒子を、０．００１〜０．５重量％
含有することを特徴とする二軸配向熱可塑性樹脂フィル
ムに関するものである。[Means for solving the problems] The present invention provides titanium dioxide coated particles with an average diameter of 0,
0.001 to 0.5% by weight of inorganic particles of 03 to 3 μm
The present invention relates to a biaxially oriented thermoplastic resin film containing:
本発明の熱可塑性樹脂は、特に限定されないが、通常ポ
リエチレンテレフタレート、ポリエチレンα、Ｂ−ビス
（２−クロルフェノキシ）エタン−４，４′−ジカルボ
キシレート、ポリエチレン２゜６ナフタレート、ポリブ
チレンテレフタレート、ポリフエニレンサルフフイド、
ポリプロピレン、ポリエチレン等が用いられる。中でも
ポリエチレンテレフタレートの場合が本発明の効果が大
きく好ましい。The thermoplastic resin of the present invention is not particularly limited, but usually polyethylene terephthalate, polyethylene α, B-bis(2-chlorophenoxy)ethane-4,4'-dicarboxylate, polyethylene 2°6 naphthalate, polybutylene terephthalate, polyphenylene sulfide,
Polypropylene, polyethylene, etc. are used. Among them, polyethylene terephthalate is preferable because the effects of the present invention are large.
本発明に用いる二酸化チタンによって被覆された無機粒
子の平均粒径は、０．０３〜３μｍ１好ましくは０．０
５〜１μｍ、更に好ましくは０゜１〜０．５μｍの範囲
である。平均粒径が小さすぎると滑り性が悪く、テープ
とした時の走行性が不良となり、一方、大きすぎると表
面が荒れすぎ、たとえば磁気テープとしたときのドロッ
プアウトが多くなる等の問題がある。The average particle size of the inorganic particles coated with titanium dioxide used in the present invention is 0.03 to 3 μm, preferably 0.0
The range is 5 to 1 μm, more preferably 0.1 to 0.5 μm. If the average particle size is too small, the slipperiness will be poor, resulting in poor running properties when made into a tape, while if it is too large, the surface will be too rough, leading to problems such as increased dropouts when made into a magnetic tape. .
また、二酸化チタンで被覆される無機粒子の種類は、特
に限定されないが、通常シリカ、炭酸カルシウム、カオ
リン、タルク等の無機粒子が好ましく用いられる。特に
、シリカの場合に本発明の効果が大きく好ましい。Further, the type of inorganic particles coated with titanium dioxide is not particularly limited, but inorganic particles such as silica, calcium carbonate, kaolin, and talc are usually preferably used. In particular, silica is preferable because the effects of the present invention are large.
また二酸化チタン被覆の厚さは、特に限定されないが、
二酸化チタン被覆の体積が粒子全体の体積の１０〜８０
％の範囲にある場合が磁気テープとしたときのドロップ
アウトが少なくなるので好ましい。The thickness of the titanium dioxide coating is not particularly limited, but
The volume of titanium dioxide coating is 10 to 80% of the total volume of the particle.
% range is preferable because it reduces dropouts when used as a magnetic tape.
また、本発明の二軸配向熱可塑性樹脂フィルムでは、二
酸化チタン被覆無機粒子が０．００１〜０．５重量％、
好ましくは０．００５〜０．２重量％含有されている必
要がおる。含有但が上記範囲より少ない場合には走行性
が不良となり、上記範囲より多い場合には、ドロップア
ウトが多くなる。尚、本発明で用いる熱可塑性樹脂フィ
ルムに、二酸化チタン被覆無機粒子以外の粒子が含まれ
ていてもよく、例えば二酸化チタン、シリカ、炭酸カル
シウム、リン酸カルシウムなどがあるが、平均粒径は、
二酸化チタン被覆無機粒子よりも小さい方が望ましい。Furthermore, in the biaxially oriented thermoplastic resin film of the present invention, titanium dioxide-coated inorganic particles are contained in an amount of 0.001 to 0.5% by weight,
Preferably, it needs to be contained in an amount of 0.005 to 0.2% by weight. If the content is less than the above range, runnability will be poor, and if it is more than the above range, dropouts will increase. Note that the thermoplastic resin film used in the present invention may contain particles other than titanium dioxide-coated inorganic particles, such as titanium dioxide, silica, calcium carbonate, calcium phosphate, etc., but the average particle size is
It is desirable that the particles be smaller than the titanium dioxide-coated inorganic particles.
また、本発明フィルムの平均表面粗さは、特に限定され
ないが、少なくとも片面の平均表面粗さが０９００２〜
０．０５μｍの範囲にある場合が、磁気テープとしたと
きの走行性及びドロップアウトが良好となるので好まし
い。Further, the average surface roughness of the film of the present invention is not particularly limited, but the average surface roughness of at least one side is 09002~
It is preferable that the thickness is in the range of 0.05 μm, since this results in good runnability and dropout when used as a magnetic tape.
更に、本発明フィルムの静摩擦係数は、特に限一定され
ないが、少なくとも片面の静摩擦係数が０゜２〜３．０
の範囲にある場合が磁気テープとしたときの走行性及び
ドロップアウトが良好となるので特に好ましい。Further, the coefficient of static friction of the film of the present invention is not particularly limited, but the coefficient of static friction on at least one side is 0°2 to 3.0.
It is particularly preferable that the magnetic tape falls within this range, since it provides good runnability and dropout when used as a magnetic tape.
次に本発明フィルムの製造方法を説明する。Next, a method for manufacturing the film of the present invention will be explained.
本発明に用いる二酸化チタン被覆無機粒子の製造法は、
特開昭６１−５７６５３Ｍ公報などに示されるように、
通常まず無機粒子を５Ａ酸チタニル稀薄水溶液中に懸濁
し、そして該無機粒子の存在下硫酸チタニルの熱加水分
解を行ない、該無機粒子の表面に二酸化チタンの被覆を
形成させる方法が一般的であるが、この方法に限定され
るものではない。The method for producing titanium dioxide-coated inorganic particles used in the present invention is as follows:
As shown in Japanese Patent Application Laid-Open No. 61-57653M, etc.
Generally, inorganic particles are first suspended in a dilute aqueous solution of titanyl 5A acid, and then titanyl sulfate is thermally hydrolyzed in the presence of the inorganic particles to form a titanium dioxide coating on the surface of the inorganic particles. However, the method is not limited to this method.
この二酸化チタン被覆無機粒子を熱可塑性樹脂中に添加
する。添加時期は、重合前、重合中、重合後のいずれで
もよいが、重合前に添加した方が本発明の効果が大きい
。The titanium dioxide-coated inorganic particles are added to a thermoplastic resin. The addition time may be before, during, or after polymerization, but the effect of the present invention is greater when added before polymerization.
次に、この熱可塑性樹脂を押出機に供給してスリット状
ダイから溶融押出し、冷却固化せしめて未延伸フィルム
を作る。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、逐次二軸延伸または同時二
軸延伸法を用いることができる。また、一旦、二軸延伸
したフィルムを少なくとも一方向に更に延伸する方法は
、フィルムの走行性をよりいっそう良好とするのに有効
である。Next, this thermoplastic resin is supplied to an extruder, melted and extruded through a slit die, and solidified by cooling to produce an unstretched film. Next, this unstretched film is biaxially stretched and oriented. As the stretching method, sequential biaxial stretching or simultaneous biaxial stretching can be used. Further, a method of further stretching the biaxially stretched film in at least one direction is effective for further improving the running properties of the film.
また必要に応じて、この延伸フィルムを熱処理すること
もできる。Moreover, this stretched film can also be heat-treated if necessary.
［作用］
本発明は、無機粒子に二酸化チタンを被覆した特殊な粒
子のうちの特定の粒子径をもったものを特定量含有した
ため、粒子表面と熱可塑性樹脂が特異な相互作用を示し
、効果的に表面突起が生成し、かつ粒子の脱落がなくな
るものと推定される。[Function] The present invention contains a specific amount of special particles of inorganic particles coated with titanium dioxide with a specific particle diameter, so that the particle surface and the thermoplastic resin exhibit a unique interaction, and the effect is enhanced. It is estimated that surface protrusions are generated and particles no longer fall off.
［特性の測定法］
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。[Method of Measuring Characteristics] The characteristic values of the present invention are based on the following measuring method and evaluation criteria.
（１） 平均粒径
粒子をエチレングリコール中に均一に分散してスラリー
とし、これを測定に便利な濃度に希釈し、遠心沈降式粒
子径測定装置（島津製作所製５Ａ−ＣＰ２型）で測定す
る。得られた粒子径分布を対数確率紙にプロットし、積
葭通過百分率が５０％となった点のメジアン径を、その
粒子の平均粒径とした。(1) Average particle size particles are uniformly dispersed in ethylene glycol to form a slurry, diluted to a concentration convenient for measurement, and measured using a centrifugal sedimentation type particle size measuring device (Shimadzu Corporation Model 5A-CP2). . The obtained particle size distribution was plotted on logarithmic probability paper, and the median diameter at the point where the percentage of passing through the reeds was 50% was taken as the average particle size of the particles.
（２） 無機粒子含有量
析出粒子量の測定：熱可塑性樹脂を溶解させることが可
能な溶媒に熱可塑性樹脂１００グラムを加えて加熱し、
完全に溶解させる。この溶液を日立王様（株）製餡延伸
１５５Ｐ−７２を用い、３ｏｏｏｏｒｐｍで４０分間延
伸分離を行ない、得られた粒子を真空乾燥する。該粒子
を走査形差動熱但計にて測定した時、ポリマーに相当す
る融解ピークが認められる場合には該粒子に再び溶媒を
加え、加熱溶解後、延伸分離操作を行なう。融解ピーク
が認められなくなった時、該粒子を析出粒子とし、重量
を測定する。この重量を１００グラムで割り、パーセン
ト表示したものを含有口とした。(2) Measurement of inorganic particle content and amount of precipitated particles: Add 100 grams of thermoplastic resin to a solvent capable of dissolving the thermoplastic resin and heat.
Dissolve completely. This solution is stretched and separated for 40 minutes at 3ooooorpm using Anten Stretcher 155P-72 manufactured by Hitachi Oyama Co., Ltd., and the obtained particles are vacuum-dried. When the particles are measured using a scanning differential calorimeter, if a melting peak corresponding to the polymer is observed, a solvent is added to the particles again, and after heating and dissolving, a stretching separation operation is performed. When the melting peak is no longer observed, the particles are treated as precipitated particles and their weight is measured. This weight was divided by 100 grams and expressed as a percentage, which was determined as the content.
なお、通常延伸分離操作は３回程度で十分である。Note that it is usually sufficient to carry out the stretching and separation operation about three times.
（３） 平均表面粗さ
Ｊ ｌ５−８−０６０１に準じて、触釘式表面粗さ計を
用いて測定した。なお、カットオフはＯ９Ｑ３ｍｍ、測
定長は４ｍｍとした。(3) Average surface roughness Measured using a contact nail type surface roughness meter according to J15-8-0601. Note that the cutoff was O9Q3mm, and the measurement length was 4mm.
（４） 静摩擦係数
ＡＳＴＭ−Ｄ−１８９４−６３に準じ、スリップテスタ
ーを用いて、静摩擦係数を測定した。荷重は２００グラ
ムとした。(4) Static friction coefficient The static friction coefficient was measured using a slip tester according to ASTM-D-1894-63. The load was 200 grams.
（５） ドロップアウト
Ｃｏ含含有−Ｆｅ２０３、ポリエステルウレタン、ポリ
（塩化ビニル−酢酸ビニル）共重合体、酢酸ブチル及び
メチルイソブチルケトンよりなる磁性塗液を十分混練し
た後、更にトリイソシアネートを加え、更に分散させて
磁性塗液を作る。こ磁性塗液を熱可塑性樹脂フィルム上
に厚さ５μｍとなるよう塗布し、乾燥させる。その後カ
レンダーｆｆｉ理を行ない、１／２インチ幅にスリット
してビデオカセットに組み込む。ビデオデツキを用いて
信号の入力、再生を行ない、ドロップアウトカウンター
（シバツク製ＴＧ−７／１ ）で−１６ｄＢの状態が５
μｓｅｃ続くドロップアウトの数を数えた。６０分間測
定を行ない、その１／６０をドロップアウト数とした。(5) After sufficiently kneading a magnetic coating liquid consisting of dropout Co-containing Fe203, polyester urethane, poly(vinyl chloride-vinyl acetate) copolymer, butyl acetate and methyl isobutyl ketone, triisocyanate is further added, and further Disperse it to make a magnetic coating liquid. The magnetic coating liquid is applied onto a thermoplastic resin film to a thickness of 5 μm and dried. Thereafter, it is calendered, slit into 1/2 inch width, and assembled into a video cassette. Input and play the signal using a video deck, and the dropout counter (Shibaku TG-7/1) shows a -16dB state of 5.
The number of dropouts lasting μsec was counted. Measurement was carried out for 60 minutes, and 1/60 of that was taken as the number of dropouts.
（６〉 走行性
上記と同様にして作ったビデオテープをビデオデツキで
連続４８時間、再生、巻きもどしを繰り返した。４８時
間後に、
■テープの端が折れてワカメ状にならない。(6) Running properties A videotape made in the same manner as above was played and rewound repeatedly on a video deck for 48 hours in a row.After 48 hours, the edges of the tape did not break and become seaweed-like.
■テープが裂けたり、破断したりしない。■The tape will not tear or break.
■出力の低下が２ｄＢ未満である。■The decrease in output is less than 2 dB.
の３つの条件を全て満足した場合には走行性：良好、い
ずれかの条件を満足できなか場合には走行性二不良とし
た。If all three conditions were satisfied, the running performance was good, and if any of the conditions could not be satisfied, the running property was rated poor.
［実施例］ 次に実施例に基ずき、本発明の実施態様を説明する。[Example] Next, embodiments of the present invention will be described based on Examples.
実施例１
平均粒径０．３μｍの二酸化チタン被覆シリカ粒子をメ
ディア分散法でエチレングリコール中に均一に分散させ
、ジメチルテレフタレートと重合して、極限粘度［η］
＝０．６５のポリエチレンテレフタレートのペレットを
得た。ポリマーに対する粒子の含有量は、０．１５重量
％でめった。Example 1 Titanium dioxide-coated silica particles with an average particle size of 0.3 μm were uniformly dispersed in ethylene glycol using a media dispersion method, and polymerized with dimethyl terephthalate to obtain an intrinsic viscosity [η]
=0.65 polyethylene terephthalate pellets were obtained. The content of particles relative to the polymer was set at 0.15% by weight.
このベレットを、１８０°Ｃで３時間減圧乾燥（３Ｔｏ
ｒｒ）ＬＪた侵、押出機に供給し、３００℃で溶融押出
し、静電印加キャスト法を用いて表面温度３０℃のキャ
ステインドラムに巻きつけて冷却固化し、厚さ約１５０
μｍの未延伸フィルムを作った。この未延伸フィルムを
９０’Ｃにて長手方向に３．４倍延伸した。This pellet was dried under reduced pressure at 180°C for 3 hours (3To
rr) LJ coating, supplied to an extruder, melted and extruded at 300°C, wrapped around a cast drum with a surface temperature of 30°C using an electrostatic casting method, cooled and solidified, to a thickness of approximately 150°C.
An unstretched film of μm was made. This unstretched film was stretched 3.4 times in the longitudinal direction at 90'C.
この延伸は２組のロールの周速差で行なわれ、延伸速度
１００００％／分であった。この−軸フイルムをステン
タを用いて延伸速度２０００％／分で１００℃で幅方向
に３．６倍延伸し、定長下で２１０℃にて５秒間熱処理
し、厚さ１２μｍのフィルムを１ｑだ。This stretching was carried out using a difference in peripheral speed between two sets of rolls, and the stretching speed was 10,000%/min. This -axis film was stretched 3.6 times in the width direction at 100°C at a stretching rate of 2000%/min using a stenter, and then heat-treated at 210°C for 5 seconds under constant length to form a 12 μm thick film for 1q. .
このフィルムの平均表面粗さは、０．００６５μｍ、静
摩擦係数は、１．４であった。This film had an average surface roughness of 0.0065 μm and a static friction coefficient of 1.4.
次にこのフィルムを磁気テープとしてドロップアウト数
を測定すると、０．２（ＩＪ／分であり、良好でおった
。また走行性も非常に良好であった（第１表）。このよ
うに、特定の平均粒径をもった特定の粒子を特定金含有
させることにより、走行性、ドロップアウトを共に満足
する優れたフィルムとなり１ｑることが分る。Next, when this film was used as a magnetic tape and the number of dropouts was measured, it was 0.2 (IJ/min), which was good.The running properties were also very good (Table 1).In this way, It can be seen that by containing specific gold particles with a specific average particle size, an excellent film satisfying both runnability and dropout can be obtained.
実施例２〜３、比較例１〜５
含有する粒子の種類、平均粒径、含有量を種々変えて、
実施例１と同様にポリエチレンテレフタレートの二軸配
向フィルムとした。含有する粒子の種類、平均粒径、含
有量の全てが本発明の範囲内であるものは、磁気テープ
としたときのドロップアウト、走行性共に良好であった
（実施例２〜３）。Examples 2 to 3, Comparative Examples 1 to 5 The type, average particle size, and content of the particles contained were varied,
A biaxially oriented film of polyethylene terephthalate was prepared in the same manner as in Example 1. When the type, average particle size, and content of the contained particles were all within the range of the present invention, both dropout and running properties were good when used as a magnetic tape (Examples 2 to 3).
しかし、含有する粒子の種類、平均粒径、含有量のいず
れかが本発明外であるときは、磁気テープとしたときの
ドロップアウト、走行性を共に満足させることはできな
かった（比較例１〜５）。However, when the type, average particle size, and content of the particles contained were outside the scope of the present invention, it was not possible to satisfy both dropout and runnability when used as a magnetic tape (Comparative Example 1 ~5).
実施例４．比較例６〜７
平均粒径０．３μｍの二酸化チタン被覆シリカ粒子を０
．１５重■％含有したポリフェニレンサルファイドを押
出□に供給し、３１０℃でＴダイから押出し、表面を２
５℃に保った金属ドラム上にキャストして冷却固化し、
未延伸フィルムを冑だ。Example 4. Comparative Examples 6-7 Titanium dioxide-coated silica particles with an average particle size of 0.3 μm were
．． Polyphenylene sulfide containing 15 wt.
Cast on a metal drum kept at 5℃, cool and solidify,
This is an unstretched film.
この未延伸フィルムを、ロール群からなる縦延伸装置に
よって、フィルム温度１０２℃、延伸速度３００００％
／分で３．９倍縦延伸し、続いてテンタを用いて、温度
１００℃、延伸速度１０００％／分で３．５倍横延伸し
、更に同一テンター内の後続する熱処理室で２７５℃で
１０秒間熱処理して、厚さ１２μｍのフィルムを１９だ
。このフィルムの平均表面粗さは、０．００８２μｍ、
静摩擦係数は、１．１であった。次にこのフィルムを磁
気テープとしてドロップアウト数を測定すると１．０個
／分であり、良好であった。また走行性も良好であった
（実施例４〉。This unstretched film was stretched at a film temperature of 102°C and a stretching speed of 30,000% using a longitudinal stretching device consisting of a group of rolls.
Then, using a tenter, the film was stretched 3.5 times in the transverse direction at a temperature of 100°C and a stretching speed of 1000%/min, and further at 275°C in a subsequent heat treatment chamber in the same tenter. After heat treatment for 10 seconds, a film with a thickness of 12 μm was obtained. The average surface roughness of this film was 0.0082 μm.
The static friction coefficient was 1.1. Next, when this film was used as a magnetic tape, the number of dropouts was measured and it was found to be 1.0 dropouts/min, which was good. The running properties were also good (Example 4).
次に、含有する粒子の平均粒径、含有量を種々変え、実
施例４と同様にして、ポリフェニレンサルファイドの二
軸配向フィルムを得た。平均粒径、含有量が本発明外で
おるものは、ドロップアウト、走行性を共に満足するこ
とはできなかったく比較例６〜７）。Next, a biaxially oriented polyphenylene sulfide film was obtained in the same manner as in Example 4 by varying the average particle diameter and content of the particles contained. Comparative Examples 6 to 7) whose average particle diameter and content were outside the scope of the present invention were unable to satisfy both dropout and runnability.
［発明の効果］
本発明は、特定の被覆をもった特定の粒径の粒子を特定
口含有した二軸配向熱可塑性樹脂フィルムとしたので、
該粒子と熱可塑性樹脂とが、特異な相互作用を示すため
、次の如き侵れだ効果を奏するものである。[Effects of the Invention] The present invention provides a biaxially oriented thermoplastic resin film containing particles of a specific diameter with a specific coating.
Since the particles and the thermoplastic resin exhibit a unique interaction, the following penetration effect is produced.
（１）磁気テープとしたときのドロップアウトが減少し
、かつ走行性も良好なフィルムとなる。(1) When used as a magnetic tape, dropouts are reduced and the film has good running properties.
（２〉 滑り性がよく、艶消し性もよいので包装材料
用、工業材料用としても好適でおる。(2) It has good slipperiness and good matteness, so it is suitable for packaging materials and industrial materials.
Claims (1)
ｍの無機粒子を、０．００１〜０．５重量％含有するこ
とを特徴とする二軸配向熱可塑性樹脂フィルム。Average particle size 0.03-3μ coated with titanium dioxide
A biaxially oriented thermoplastic resin film containing 0.001 to 0.5% by weight of inorganic particles of m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61207809A JP2611203B2 (en) | 1986-09-05 | 1986-09-05 | Biaxially oriented thermoplastic resin film for magnetic tape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61207809A JP2611203B2 (en) | 1986-09-05 | 1986-09-05 | Biaxially oriented thermoplastic resin film for magnetic tape |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6363725A true JPS6363725A (en) | 1988-03-22 |
| JP2611203B2 JP2611203B2 (en) | 1997-05-21 |
Family
ID=16545857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61207809A Expired - Lifetime JP2611203B2 (en) | 1986-09-05 | 1986-09-05 | Biaxially oriented thermoplastic resin film for magnetic tape |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2611203B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7714477B2 (en) | 2006-03-13 | 2010-05-11 | Hitachi, Ltd. | Stator of rotating electric machine and structure thereof |
| JP2015525807A (en) * | 2012-06-29 | 2015-09-07 | コロン・インダストリーズ・インコーポレイテッド | Polyester resin composition and polyester film using the same |
| CN112280262A (en) * | 2020-11-12 | 2021-01-29 | 浙江贝隆纺织有限公司 | Preparation method of ultraviolet-resistant flame-retardant polyester fiber master batch |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6032836A (en) * | 1983-08-04 | 1985-02-20 | Nippon Chem Ind Co Ltd:The | Antiblocking agent |
-
1986
- 1986-09-05 JP JP61207809A patent/JP2611203B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6032836A (en) * | 1983-08-04 | 1985-02-20 | Nippon Chem Ind Co Ltd:The | Antiblocking agent |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7714477B2 (en) | 2006-03-13 | 2010-05-11 | Hitachi, Ltd. | Stator of rotating electric machine and structure thereof |
| JP2015525807A (en) * | 2012-06-29 | 2015-09-07 | コロン・インダストリーズ・インコーポレイテッド | Polyester resin composition and polyester film using the same |
| CN112280262A (en) * | 2020-11-12 | 2021-01-29 | 浙江贝隆纺织有限公司 | Preparation method of ultraviolet-resistant flame-retardant polyester fiber master batch |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2611203B2 (en) | 1997-05-21 |
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