JPH0657016A - Syndiotactic polystyrene film - Google Patents
Syndiotactic polystyrene filmInfo
- Publication number
- JPH0657016A JPH0657016A JP21270292A JP21270292A JPH0657016A JP H0657016 A JPH0657016 A JP H0657016A JP 21270292 A JP21270292 A JP 21270292A JP 21270292 A JP21270292 A JP 21270292A JP H0657016 A JPH0657016 A JP H0657016A
- Authority
- JP
- Japan
- Prior art keywords
- film
- less
- syndiotactic polystyrene
- syndiotactic
- poly
- 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
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はシンジオタクチックポリ
スチレン系二軸延伸フィルム、さらに詳しく言えばフィ
ルム表面の平滑性に極めて優れ、且つフィルムの厚みに
関係なくハンドリング特性が良好であり、更にフィルム
表面の耐削れ特性が良好なシンジオタクチックポリスチ
レン系二軸延伸フィルムに関するものである。FIELD OF THE INVENTION The present invention relates to a syndiotactic polystyrene biaxially stretched film, and more specifically, it has extremely excellent smoothness of the film surface and has good handling characteristics regardless of the film thickness. The present invention relates to a syndiotactic polystyrene-based biaxially stretched film having good abrasion resistance.
【０００２】[0002]
【従来の技術】シンジオタクチックポリスチレン系二軸
延伸フィルムは耐熱性、電気特性、透明性などに優れ、
磁気テープ用、写真・製版用、コンデンサー用、包装用
等、各種のフィルム用途に展開が期待されてる。これら
のフィルム用として用いられる場合、そのすべり性及び
耐摩耗性はフィルムの加工工程の作業性の良否、更には
その製品品質の良否を左右する大きな要因になってい
る。また、特に磁気テープ用途やコンデンサー用途に於
ては、高級化、小型化、薄膜化、高信頼化のために、フ
ィルム表面の超平滑化や超薄手化が要求されている。し
かしながら、シンジオタクチックポリスチレン系二軸延
伸フィルムにおいては、特に、単に表面を平滑にし、更
に薄手化したのでは、フィルムの製造時及び加工時のハ
ンドリング特性が不良になり、更にフィルムの走行時に
ガイドロールとの接触等による擦り傷や削れによるロー
ルへの白紛付着等の耐削れ性不良の問題が生じる。2. Description of the Related Art Biaxially stretched syndiotactic polystyrene films are excellent in heat resistance, electrical characteristics, transparency, etc.
It is expected to be applied to various film applications such as magnetic tapes, photo / plate making, capacitors, and packaging. When it is used for these films, its slipperiness and abrasion resistance are major factors that affect the workability of the film processing process and the quality of the product. Further, particularly in magnetic tape applications and capacitor applications, ultra-smoothness and ultra-thinning of the film surface are required for high quality, downsizing, thinning, and high reliability. However, in the case of the syndiotactic polystyrene biaxially stretched film, in particular, if the surface is simply smoothed and further thinned, the handling characteristics at the time of manufacturing and processing of the film become poor, and further, the guide during running of the film. There arises a problem of poor abrasion resistance such as scratches due to contact with the roll or abrasion of the powder and adhesion of white powder to the roll.
【０００３】すべり性の良好なフィルムとして、無機粒
子を添加し、表面粗さRaが特定の範囲にあり、静摩擦係
数が限定されたものが知られている（特開平3-74437
号）。As a film having good slipperiness, a film in which inorganic particles are added, the surface roughness Ra is within a specific range, and the coefficient of static friction is limited is known (Japanese Patent Laid-Open No. 3-74437).
issue).
【０００４】[0004]
【発明が解決しようとする課題】しかし、上記従来のす
べり性良好なフィルムでは、低速作業時には良好なハン
ドリング特性が得られるが、作業が高速になるとハンド
リング特性が急激に悪化するという問題を発生すること
があった。またシンジオタクチックポリスチレン系二軸
延伸フィルムにおいては、特にフィルムの厚みが薄くな
るとハンドリング特性が悪化する傾向が大きく、上記の
無機粒子を添加し、表面粗さRaと静摩擦係数の範囲を規
定したフィルムにおいても同様の傾向を備えており、そ
のために良好なハンドリング特性が得られたとしても、
厚みが変わると所望のハンドリング特性が得られなくな
っていた。更に、シンジオタクチックポリスチレン系二
軸延伸フィルムは室温では脆いため、フィルムの製造時
及び加工時にロール等との摩擦によりフィルム表面に擦
り傷やロール上への白紛付着等の問題が発生しやすかっ
た。However, although the above-mentioned conventional films having good slipperiness can provide good handling characteristics at low speed work, there arises a problem that the handling characteristics rapidly deteriorate at high speed work. There was an occasion. Further, in the syndiotactic polystyrene biaxially stretched film, the handling property tends to deteriorate particularly when the thickness of the film becomes thin, and the above inorganic particles are added to the film to define the range of the surface roughness Ra and the coefficient of static friction. Also has the same tendency, and therefore, even if good handling characteristics are obtained,
When the thickness was changed, desired handling characteristics could not be obtained. Further, since the syndiotactic polystyrene biaxially stretched film is brittle at room temperature, problems such as scratches on the film surface and adhesion of white powder on the roll were likely to occur due to friction with the roll during production and processing of the film. .
【０００５】本発明は、フィルム表面の平滑性に極めて
優れ、且つフィルムの厚みに関係なくハンドリング特性
に優れ、更に走行時にロール等との摩擦に伴う擦り傷の
発生やロールへの白粉が生じないフィルム表面の耐削れ
特性の良好なシンジオタクチックポリスチレン系二軸延
伸フィルムを提供することを目的とする。The present invention is a film in which the smoothness of the film surface is extremely excellent, the handling properties are excellent regardless of the thickness of the film, and scratches due to friction with a roll or the like during running and white powder on the roll are not generated. An object of the present invention is to provide a syndiotactic polystyrene biaxially stretched film having good surface abrasion resistance.
【０００６】[0006]
【課題を解決するための手段】本発明は、少なくとも片
面に1 μ以上の突起が実質的になく、0.54μｍ未満0.27
μ以上の突起が50個/mm2以上であり、三次元表面粗さ S
Δa が0.004 μｍ以上0.04μｍ以下、且つ空気抜け速さ
が900 秒以下であることを特長とする、フィルム表面の
平滑性に極めて優れ、且つフィルムの厚みに関係なくハ
ンドリング特性に優れ、更にフィルム表面の耐削れ特性
が良好なシンジオタクチックポリスチレン系二軸延伸フ
ィルムを提供するものである。According to the present invention, there is substantially no protrusion of 1 μ or more on at least one surface, and the protrusion is less than 0.54 μm.
The number of protrusions of μ or more is 50 / mm 2 or more, and the three-dimensional surface roughness S
Features a Δa of 0.004 μm or more and 0.04 μm or less, and an air bleeding speed of 900 seconds or less. It has excellent film surface smoothness and excellent handling characteristics regardless of film thickness. The biaxially stretched syndiotactic polystyrene-based film has good abrasion resistance.
【０００７】本発明に用いられる立体規則性がシンジオ
タクチック構造であるポリスチレン系重合体は、側鎖で
あるフェニル基又は置換フェニル基が核磁気共鳴法によ
り定量されるタクテイシテイがダイアッド（構成単位が
二個）で85％以上、ペンタッド（構成単位が５個）で50
％以上のシンジオタクチック構造であることが望まし
い。The polystyrene polymer having stereoregularity of syndiotactic structure used in the present invention has a tacticity of diad (constituent unit is a phenyl group or a substituted phenyl group which is a side chain) quantified by a nuclear magnetic resonance method. 85% or more for two) and 50 for pentad (5 units)
It is desirable that the structure has a syndiotactic structure of not less than%.
【０００８】該ポリスチレン系重合体としては、ポリス
チレン、ポリ（p-、m-又はo-メチルスチレン）、ポリ
（2,4-、2,5-、3,4-又は3,5-ジメチルスチレン）、ポリ
（p-ターシャリーブチルスチレン）などのポリ（アルキ
ルスチレン）、ポリ（p-、m-又はo-クロロスチレン）、
ポリ（p-、m-又はo-ブロモスチレン）、ポリ（p-、m-又
はo-フルオロスチレン）、ポリ（o-メチル-p- フルオロ
スチレン）などのポリ（ハロゲン化スチレン）、ポリ
（p-、m-又はo-クロロメチルスチレン）などのポリ（ハ
ロゲン置換アルキルスチレン）、ポリ（p-、m-又はo-メ
トキシスチレン）、ポリ（p-、m-又はo-エトキシスチレ
ン）などのポリ（アルコキシスチレン）、ポリ（p-、m-
又はo-カルボキシメチルスチレン）などのポリ（カルボ
キシアルキルスチレン）ポリ（p-ビニルベンジルプロピ
ル）などのポリ（アルキルエーテルスチレン）、ポリ
（p-トリメチルシリルスチレン）などのポリ（アルキル
シリルスチレン）、さらにはポリ（ビニルベンジルジメ
トキシホスファイド）などが挙げられる。Examples of the polystyrene-based polymer include polystyrene, poly (p-, m- or o-methylstyrene), poly (2,4-, 2,5-, 3,4- or 3,5-dimethylstyrene. ), Poly (alkylstyrene) such as poly (p-tertiarybutylstyrene), poly (p-, m- or o-chlorostyrene),
Poly (halogenated styrene) such as poly (p-, m- or o-bromostyrene), poly (p-, m- or o-fluorostyrene), poly (o-methyl-p-fluorostyrene), poly ( p-, m- or o-chloromethylstyrene) and other poly (halogen-substituted alkylstyrenes), poly (p-, m- or o-methoxystyrene), poly (p-, m- or o-ethoxystyrene), etc. Poly (alkoxystyrene), poly (p-, m-
Or, poly (carboxyalkylstyrene) such as o-carboxymethylstyrene), poly (alkyletherstyrene) such as poly (p-vinylbenzylpropyl), poly (alkylsilylstyrene) such as poly (p-trimethylsilylstyrene), and Examples thereof include poly (vinylbenzyldimethoxyphosphide).
【０００９】本発明においては、前記ポリスチレン系重
合体のなかで、特にポリスチレンが好適である。また、
本発明で用いるシンジオタクチック構造を有するポリス
チレン系重合体は、必ずしも単一化合物である必要はな
く、シンジオタクティシティが前記範囲内であればアタ
クチック構造やアイソタクチック構造のポリスチレン系
重合体との混合物や、共重合体及びそれらの混合物でも
よい。In the present invention, polystyrene is particularly preferable among the polystyrene polymers. Also,
The polystyrene-based polymer having a syndiotactic structure used in the present invention is not necessarily a single compound, and if the syndiotacticity is within the above range, a polystyrene-based polymer having an atactic structure or an isotactic structure is used. It may be a mixture of, a copolymer and a mixture thereof.
【００１０】また本発明に用いるポリスチレン系重合体
は、重量平均分子量が10,000以上、更に好ましくは50,0
00以上である。重量平均分子量が10,000未満のもので
は、強伸度特性や耐熱性に優れた二軸延伸フィルムを得
ることができない。重量平均分子量の上限については、
特に限定されるものではないが1500,000以上では延伸張
力の増大に伴う破断の発生等が生じるため、余り好まし
くない。The polystyrene polymer used in the present invention has a weight average molecular weight of 10,000 or more, more preferably 50,0.
00 or more. When the weight average molecular weight is less than 10,000, it is not possible to obtain a biaxially stretched film having excellent strength and elongation characteristics and heat resistance. For the upper limit of the weight average molecular weight,
Although not particularly limited, if it is 1500,000 or more, breakage occurs due to an increase in the drawing tension, so that it is not preferable.
【００１１】更に、本発明のシンジオタクチックポリス
チレン系二軸延伸フィルムは、公知の方法、例えば、縦
延伸及び横延伸を順に行なう逐次二軸延伸方法のほか、
横・縦・縦延伸法、縦・横・縦延伸法、縦・縦・横延伸
法などの延伸方法を採用することができ、要求される強
度や寸法安定性などの諸特性に応じて選択される。な
お、必要に応じて、熱固定処理、縦弛緩処理、横弛緩処
理などを施してもよい。そして、前記の突起高さと突起
数の関係、三次元表面粗さ SΔa 、及び空気抜け速さ
は、フィルムの製膜条件及び滑剤粒子によって調整され
る。滑剤粒子の種類及び添加量は突起高さと突起数の関
係、三次元表面粗さ SΔa 、及び空気抜け速さが所定の
範囲内に入るならば特に限定されるものではないが、シ
リカ、二酸化チタン、タルク、カオリナイト等の金属酸
化物、炭酸カルシウム、リン酸カルシウム、硫酸バリウ
ムなどの金属の塩または有機ポリマーからなる粒子等の
シンジオタクチックポリスチレン系ポリマーに対し不活
性な粒子が例示される。そして、これらの滑剤は、いず
れか一種を単独で用いてもよく、また２種以上を併用し
てもよいが、使用する滑剤の平均粒子系は0.01μｍ以上
2.0 μｍ以下、特に0.05μｍ以上1.5 μｍ以下が好まし
く、粒子径のばらつき度（標準偏差と平均粒子径との比
率）が２５％以下が好ましく、添加量はシンジオタクチ
ックポリスチレン系ポリマー100 重量％に対し0.005 重
量％以上2.0 重量％以下含有することが好ましく、特に
0.1 重量％以上1.0 重量％以下が好ましい。また、滑剤
粒子の形状は、面積形状係数が60％以上のものが１種類
以上含まれていることが好ましい。この面積形状係数は
次式によって求められる。 面積形状係数＝（粒子の投影断面積／粒子に外接する円
の面積）× 100（％）Further, the syndiotactic polystyrene biaxially stretched film of the present invention can be produced by a known method, for example, a sequential biaxial stretching method in which longitudinal stretching and transverse stretching are carried out in order,
Stretching methods such as transverse / longitudinal / longitudinal stretching method, longitudinal / horizontal / longitudinal stretching method, longitudinal / longitudinal / horizontal stretching method can be adopted, and selected according to various characteristics such as required strength and dimensional stability. To be done. In addition, you may perform a heat setting process, a longitudinal relaxation process, a lateral relaxation process etc. as needed. The relationship between the height of protrusions and the number of protrusions, the three-dimensional surface roughness SΔa, and the air bleeding speed are adjusted by the film forming conditions of the film and the lubricant particles. The type and amount of the lubricant particles are not particularly limited as long as the relation between the height of the protrusions and the number of protrusions, the three-dimensional surface roughness SΔa, and the air bleeding speed are within the predetermined ranges. Examples thereof include particles that are inactive to syndiotactic polystyrene-based polymers such as metal oxides such as talc and kaolinite, salts of metals such as calcium carbonate, calcium phosphate and barium sulfate, or particles composed of organic polymers. Any one of these lubricants may be used alone, or two or more thereof may be used in combination, but the average particle size of the lubricant used is 0.01 μm or more.
2.0 μm or less, particularly 0.05 μm or more and 1.5 μm or less, the degree of variation in particle diameter (ratio between standard deviation and average particle diameter) is preferably 25% or less, and the addition amount is 100% by weight of syndiotactic polystyrene polymer. It is preferable to contain 0.005% by weight or more and 2.0% by weight or less, especially
It is preferably 0.1% by weight or more and 1.0% by weight or less. In addition, it is preferable that the shape of the lubricant particles includes at least one kind having a surface shape factor of 60% or more. This area shape factor is calculated by the following equation. Area shape factor = (projected cross-sectional area of particle / area of circle circumscribing particle) x 100 (%)
【００１２】本発明に用いられるポリスチレン系重合体
には必要に応じて、公知の酸化防止剤、帯電防止剤など
を適量配合したものを用いることができる。配合量は、
ポリスチレン系重合体100 重量％に対して、10重量％以
下が望ましい。10重量％を越えると延伸時に破断が起こ
り易くなり、生産安定性が不良となる。本発明のシンジ
オタクチックポリスチレン系二軸延伸フィルムの少なく
とも片面の突起は、1μｍ以上のものが実質的になく、
0.54μｍ未満0.27μｍ以上のものが50個/cm2以上、好ま
しくは70個/cm2以上、更に好ましくは100 個/cm2以上あ
り、また突起数の上限は5000個/mm2以下、好ましくは30
00個/mm2以下である。1 μｍ以上の突起があるもしくは
0.54μｍ未満0.27μｍ以上の突起が5000個/mm2以上ある
とがあると走行時にフィルムからの脱落による擦り傷や
白紛が発生しやすくなり、耐削れ特性が不良となる。ま
た、0.27μｍ以下の突起が50個/mm2未満では平滑な表面
で且つ耐削れ特性及びハンドリング特性に優れたものが
得られない。1 μｍ未満0.54μｍ以上の突起については
特に限定されないが、擦り傷や白紛の発生による耐削れ
特性を悪化させないためには、200 個/mm2以下であるこ
とが望ましい。また、本発明のシンジオタクチックポリ
スチレン系二軸延伸フィルムの少なくとも片面の三次元
表面粗さ SΔa は0.004 以上0.04以下であることが必要
である。The polystyrene-based polymer used in the present invention may contain, if necessary, known compounds such as antioxidants and antistatic agents in suitable amounts. The blending amount is
10% by weight or less is desirable based on 100% by weight of the polystyrene polymer. If it exceeds 10% by weight, breakage tends to occur during stretching, resulting in poor production stability. The syndiotactic polystyrene biaxially stretched film of the present invention has substantially no projections on at least one surface of 1 μm or more,
Less than 0.54 μm and 0.27 μm or more are 50 pieces / cm 2 or more, preferably 70 pieces / cm 2 or more, more preferably 100 pieces / cm 2 or more, and the upper limit of the number of protrusions is 5000 pieces / mm 2 or less, preferably 30
It is less than 00 / mm 2 . There is a protrusion of 1 μm or more, or
If there are 5000 protrusions / mm 2 or more of less than 0.54 μm and 0.27 μm or more, scratches and white powder are likely to occur due to falling off from the film during running, resulting in poor abrasion resistance. If the number of protrusions of 0.27 μm or less is less than 50 protrusions / mm 2 , a smooth surface and excellent abrasion resistance and handling properties cannot be obtained. The number of protrusions of less than 1 μm and 0.54 μm or more is not particularly limited, but it is preferable that the number is 200 / mm 2 or less in order not to deteriorate the abrasion resistance due to scratches or white powder. Further, the three-dimensional surface roughness SΔa of at least one surface of the syndiotactic polystyrene-based biaxially stretched film of the present invention needs to be 0.004 or more and 0.04 or less.
【００１３】SΔa が0.004 未満ではハンドリング特性
が不良になり、 SΔa が0.04を越えると、例えば磁気テ
ープ用途では電磁変換特性が不良になり、写真、製版用
途では透明性が減少するため好ましくなく、フィルムコ
ンデンサー用途では耐電圧特性の低下の問題を生じる。
更に、本発明のシンジオタクチックポリスチレン系二軸
延伸フィルムの少なくとも片面の空気抜け速さは900 秒
以下である必要がある。更に好ましくは700 秒以下であ
る。即ち、空気抜け速さを900 秒以下、更に好ましくは
700 秒以下にすることにより、高速作業時においても、
フィルムの厚みや強度とは無関係にハンドリング特性が
良好なシンジオタクチックポリスチレン系二軸延伸フィ
ルムが得られる。反対に、空気抜け速さが900 秒を越え
た場合、高速作業時のハンドリング特性が不良となり、
例えばフィルムを高速でロール状に巻き取る場合にフィ
ルムと巻き取りロールの間に空気が取り込まれしわが生
じやすく、巻姿が不良になったり、フィルムが巻き込む
空気層の潤滑効果によってフィルムが幅方向に蛇行して
ロールの端面の不揃いが生じたりする。When SΔa is less than 0.004, the handling properties are poor, and when SΔa is more than 0.04, the electromagnetic conversion properties are poor, for example, in magnetic tape applications, and transparency is reduced in photographic and plate making applications. In capacitor applications, there arises a problem of deterioration of withstand voltage characteristics.
Further, the air bleeding speed of at least one side of the syndiotactic polystyrene-based biaxially stretched film of the present invention needs to be 900 seconds or less. More preferably, it is 700 seconds or less. That is, the air bleeding speed is 900 seconds or less, more preferably
By setting it to 700 seconds or less, even during high-speed work,
It is possible to obtain a syndiotactic polystyrene biaxially stretched film having good handling properties regardless of the thickness and strength of the film. On the other hand, if the air release rate exceeds 900 seconds, the handling characteristics during high-speed work will be poor,
For example, when the film is wound into a roll at a high speed, air is easily trapped between the film and the take-up roll to cause wrinkles, resulting in a bad winding shape and the film being wound in the width direction due to the lubricating effect of the air layer. The end surface of the roll may become irregular and meander.
【００１４】実施例 以下に実施例にて本発明を具体的に説明するが、本発明
はこれら実施例のみに限定されるものではない。なお、
フィルムの評価方法を以下に示す。 （１）三次元表面粗さ SΔa フィルム表面を触針式３次元表面粗さ計（SE-3AK, 株式
会社小坂研究所社製）を用いて、針の半径２μｍ、荷重
30mgの条件化に、フィルムの長手方向にカットオフ値0.
25mmで、測定長1mm にわたって測定し、２μm ピッチで
500 点に分割し、各点の高さを３次元粗さ解析装置（SP
A-11) に取り込ませた。これと同様の操作をフィルムの
幅方向について２μm 間隔で連続的に150 回、即ちフィ
ルムの幅方向0.3mm にわたって行ない、解析装置にデー
タを取り込ませた。次に、解析装置を用いて、 SΔa を
求めた。 （２）空気抜け速度 図１に示す測定装置を用意する。即ち、台盤１の上面に
円形の孔１a を設け、この孔1a内に直径70mmのガラス平
板２を固定してガラス平板２を固定してガラス平板２の
外周と孔壁１b との間に溝を形成し、更に上記の孔1bを
囲むリング状の溝孔1cを明け、この溝孔1cを上記ガラス
平板２の外周の溝と連通させ、溝孔1cにパイプ３を介し
て真空ポンプ４の吸引口を接続する。そして、台盤１の
上面に、ガラス平板２を覆う大きさのフィルム試料５を
重ね、その外周を粘着テープ６で台盤１状に密封状に固
定し、真空ポンプ４を駆動し、ガラス平板２の外周部に
干渉縞が出現してからガラス平板２の全面に干渉縞が広
がり、その動きが止るまでの時間（秒）を測定し、この
時間（秒）をもって空気抜け速さとする。 （３）フィルム表面の突起数 フィルム表面にアルミニウムを薄く均一に蒸着した後、
Nache 社製二光束干渉顕微鏡を用い、400 倍で1mm2の面
積を観察し、突起高さに対応する干渉縞をもつ突起数を
数える。EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples. In addition,
The evaluation method of the film is shown below. (1) Three-dimensional surface roughness SΔa Using a stylus-type three-dimensional surface roughness meter (SE-3AK, Kosaka Laboratory Ltd.) on the film surface, needle radius 2 μm, load
Cutoff value of 0 in the longitudinal direction of the film under the condition of 30 mg.
25 mm, measuring length 1 mm, 2 μm pitch
It is divided into 500 points and the height of each point is calculated by 3D roughness analyzer (SP
A-11). The same operation as above was continuously performed 150 times in the width direction of the film at intervals of 2 μm, that is, over 0.3 mm in the width direction of the film, and the data was taken into the analyzer. Next, SΔa was obtained using an analyzer. (2) Air release rate The measurement device shown in FIG. 1 is prepared. That is, a circular hole 1a is provided on the upper surface of the base 1, a glass plate 2 having a diameter of 70 mm is fixed in the hole 1a, and the glass plate 2 is fixed between the outer periphery of the glass plate 2 and the hole wall 1b. A groove is formed, and a ring-shaped groove 1c surrounding the hole 1b is opened, the groove 1c is communicated with the groove on the outer periphery of the glass flat plate 2, and the vacuum pump 4 is inserted through the pipe 3 into the groove 1c. Connect the suction port of. Then, a film sample 5 having a size that covers the glass flat plate 2 is placed on the upper surface of the base 1, and the outer periphery of the film sample 5 is hermetically fixed to the base 1 with an adhesive tape 6, and the vacuum pump 4 is driven to drive the glass flat plate. The time (seconds) from the appearance of the interference fringes on the outer peripheral portion of 2 to the spread of the interference fringes on the entire surface of the glass flat plate 2 and the movement thereof is measured, and this time (second) is defined as the air bleeding speed. (3) Number of protrusions on the film surface After thinly and uniformly depositing aluminum on the film surface,
Using a two- beam interference microscope manufactured by Nache, observe an area of 1 mm 2 at 400 times and count the number of protrusions having interference fringes corresponding to the protrusion height.
【００１５】（４）フィルムのハンドリング特性 広幅のスリットロールを高速でスリットし、小幅のロー
ルに巻直すに際しロール端部の巻ずれ、しわ、バルブ等
を生じないで問題のないロールが得られるかどうかを４
段階評価し、次のランク付けで評価した。 １級；問題のないスリットロールを得ることは極めて困
難 ２級；低速で問題のないスリットロールが得られる ３級；中速で問題のないスリットロールが得られる ４級；高速で問題のないスリットロールが得られる(4) Film handling characteristics When slitting a wide slit roll at a high speed and rewinding it into a narrow roll, is it possible to obtain a roll without problems such as misalignment of the end of the roll, wrinkles and valves? Please 4
It was graded and evaluated according to the following ranking. 1st grade: It is extremely difficult to obtain a problem-free slit roll 2nd grade: A low-problem slit roll can be obtained 3rd grade: A medium-speed slit roll can be obtained 4th grade: A high-speed nonproblem slit Roll is obtained
【００１６】（５）フィルムの耐削れ特性 フィルムを細幅にスリットし、金属製ガイドロールにこ
すり付けて走行するとき、一定の供給張力に対してガイ
ドロール擦過後の擦り傷の発生量及びロール上への白紛
発生量を５段階評価し、次のランク付けで表わした。擦
り傷と白紛による評価結果が異なるときは両者のうちの
悪いほうの結果を採用した。 １級；擦り傷多い、白紛非常に多い ２級；擦り傷かなり多い、白紛多い ３級；擦り傷ややあり、白紛発生ややあり ４級；擦り傷ほとんどなし、白紛発生ほぼなし ５級；擦り傷発生なし、白紛発生なし （６）平均粒子径 滑剤粒子を（株）日立製作所製S-５１０型走査型電子顕
微鏡で観察し、写真撮影したものを拡大して複写し、滑
剤の外形をトレースし任意に200 個の粒子を黒く塗りつ
ぶした。この像をニコレ（株）製ルーゼックス500 型画
像解析装置を用いて、それぞれの粒子の水平方向のフェ
レ径を測定し、その平均値を平均粒子径とした。また、
粒子径のばらつき度は下記の式により算出した。 ばらつき度＝（粒子径の標準偏差／平均粒子径）X 100
（％）(5) Scratch resistance of film When the film is slit into a narrow width and rubbed against a metal guide roll to run, the amount of scratches generated after rubbing the guide roll against the constant supply tension and the roll top The amount of white powder generated was evaluated on a scale of 5 and expressed in the following ranking. When the evaluation results for scratches and white powder are different, the worse result of the two is adopted. 1st grade; many scratches, white dust very much 2nd grade: many scratches, white powder lots 3rd grade: slight scratches, white dust occurred slightly 4th grade: almost no scratches, white dust almost never occurred 5th grade: scratches occurred None, white powder was not generated (6) Average particle size Lubricant particles were observed with Hitachi Ltd. S-510 scanning electron microscope, and a photographed one was enlarged and copied to trace the outer shape of the lubricant. Arbitrarily 200 particles were painted black. This image was measured for the Feret diameter in the horizontal direction of each particle using a Luzex 500 type image analyzer manufactured by Nikole Co., Ltd., and the average value was taken as the average particle diameter. Also,
The degree of variation in particle size was calculated by the following formula. Variance = (standard deviation of particle size / average particle size) x 100
(%)
【００１７】（７）面積形状係数 平均粒子径の測定に用いたトレース像から任意に２０個
の粒子を選び（６）で用いた画像解析装置を用いて、そ
れぞれの粒子の投影断面積を測定した。また、それらの
粒子に外接する円の面積を算出し、下記の式により算出
した。 面積形状係数＝（粒子の投影断面積／粒子に外接する円
の面積）× 100（％） 実施例 滑剤として、平均粒子径0.6 μｍ、ばらつき度25% 、面
積形状係数75% の炭酸カルシウムをシンジオタクチック
ポリスチレン（重量平均分子量300000）100 重量％に対
して3.0 重量％添加したポリマーチップと、滑剤の添加
されていないポリマーチップを重量比で１対９の割合で
混合した後、乾燥し、295 ℃で溶融し、200 μｍのリッ
プギャップのT ダイから押し出し、40℃の冷却ロールに
静電印荷法により密着・ 冷却固化し、70μｍの無定形シ
ートを得た。該無定形シートをまずロールにより95℃に
予熱し、表面温度800 ℃の赤外線加熱ヒーターを４本使
用し、更に加熱し、フィルム温度136 ℃で縦方向に3.5
倍延伸し、ついでテンターで、フィルムを120 ℃に予熱
し、横方向に延伸温度120 ℃で3.3 倍延伸し、260 ℃で
熱固定した。得られたフィルムの厚みは6 μｍであっ
た。(7) Area Shape Factor 20 projected particles are arbitrarily selected from the trace image used for measuring the average particle diameter, and the projected cross-sectional area of each particle is measured using the image analysis device used in (6). did. Further, the area of the circle circumscribing these particles was calculated and calculated by the following formula. Area shape factor = (projected cross-sectional area of particle / area of circle circumscribing particle) × 100 (%) Example Synthetic calcium carbonate having an average particle size of 0.6 μm, a degree of variation of 25%, and an area shape factor of 75% was used as a synergistic agent. Polymer chips added with 3.0% by weight to 100% by weight of tactic polystyrene (weight average molecular weight 300,000) and polymer chips without addition of a lubricant were mixed at a weight ratio of 1 to 9, and then dried. It was melted at ℃, extruded from a T-die with a lip gap of 200 μm, adhered to a 40 ° C chill roll by electrostatic loading and solidified by cooling to obtain a 70 μm amorphous sheet. The amorphous sheet is first preheated to 95 ° C with a roll, four infrared heaters with a surface temperature of 800 ° C are used, and further heated to a film temperature of 136 ° C in a longitudinal direction of 3.5 ° C.
The film was double-stretched, then preheated to 120 ° C. in a tenter, laterally stretched 3.3 times at a stretching temperature of 120 ° C., and heat-set at 260 ° C. The thickness of the obtained film was 6 μm.
【００１８】比較例 滑剤粒子の炭酸カルシウムのばらつき度を４０％とした
以外は実施例と同様の操作を行なった。Comparative Example The same operation as in the example was carried out except that the variation degree of the calcium carbonate in the lubricant particles was 40%.
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【発明の効果】以上、記載のとおり、本発明は前記特許
請求の範囲に記載のとおりの構成を採用することによ
り、フィルム表面の平滑性に極めて優れ、且つフィルム
の厚みに関係なくハンドリング特性に優れ、更にフィル
ム表面の耐削れ特性に優れたシンジオタクチックポリス
チレン系二軸延伸フィルムが提供され、従って、本発明
の工業的価値は大である。As described above, according to the present invention, by adopting the constitution as described in the claims, the smoothness of the film surface is extremely excellent, and the handling property is achieved regardless of the film thickness. A syndiotactic polystyrene biaxially stretched film which is excellent and has excellent abrasion resistance on the film surface is provided, and therefore the industrial value of the present invention is great.
【図１】この発明の空気抜け速さを測定するための装置
の断面図である。FIG. 1 is a cross-sectional view of an apparatus for measuring an air escape rate according to the present invention.
【符号の説明】 １：台盤 ２ ガラス平板 ３ 吸引パイプ ４ 真空ポンプ ５ フィルム試料 ６ 粘着テープ[Explanation of symbols] 1: Platform 2 Glass flat plate 3 Suction pipe 4 Vacuum pump 5 Film sample 6 Adhesive tape
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ２９Ｌ 7:00 4Ｆ (72)発明者 奥平 正 滋賀県大津市堅田二丁目１番１号 東洋紡 績株式会社総合研究所内─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification number Reference number within the agency FI Technical display location B29L 7:00 4F (72) Inventor Tadashi Okuhira 2-1-1 Katata, Otsu, Shiga Prefecture Toyobo Co., Ltd. Research Institute, Inc.
Claims (1)
るスチレン系重合体から成り、少なくとも片面に１μ以
上の突起が実質的になく、0.54μｍ未満0.27μ以上の突
起が50個／mm2 以上5000個/mm2未満であり、三次元表面
粗さ SΔa が0.004 以上0.04以下であり、更に、空気抜
け速さが900 秒以下であることを特徴とするシンジオタ
クチックポリスチレンフィルム。1. A styrene-based polymer having a substantially syndiotactic structure, substantially no protrusions of 1 μ or more on at least one side, and 50 protrusions of less than 0.54 μm and 0.27 μ or more / mm 2 or more 5000. A syndiotactic polystyrene film having a number of particles / mm 2 or less, a three-dimensional surface roughness SΔa of 0.004 or more and 0.04 or less, and an air bleeding speed of 900 seconds or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4212702A JP2713338B2 (en) | 1992-08-10 | 1992-08-10 | Syndiotactic polystyrene film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4212702A JP2713338B2 (en) | 1992-08-10 | 1992-08-10 | Syndiotactic polystyrene film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0657016A true JPH0657016A (en) | 1994-03-01 |
| JP2713338B2 JP2713338B2 (en) | 1998-02-16 |
Family
ID=16627019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4212702A Expired - Lifetime JP2713338B2 (en) | 1992-08-10 | 1992-08-10 | Syndiotactic polystyrene film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2713338B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2163573A1 (en) * | 2007-06-21 | 2010-03-17 | Teijin Limited | Insulating film |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0691750A (en) * | 1992-09-11 | 1994-04-05 | Toyobo Co Ltd | Syndiotactic polystyrene biaxially drawn film |
| JPH06100711A (en) * | 1992-09-21 | 1994-04-12 | Toyobo Co Ltd | Syndiotactic polystyrenic biaxially oriented film |
| JPH0699485A (en) * | 1992-09-21 | 1994-04-12 | Toyobo Co Ltd | Syndiotactic polystyrenic biaxially stretched film |
| JPH06106616A (en) * | 1992-09-28 | 1994-04-19 | Toyobo Co Ltd | Syndiotactic polystyrenr biaxially oriented film |
| JPH06107812A (en) * | 1992-09-28 | 1994-04-19 | Toyobo Co Ltd | Biaxially oriented syndiotactic polystyrene film |
| JPH06107813A (en) * | 1992-09-28 | 1994-04-19 | Toyobo Co Ltd | Biaxially oriented syndiotactic polystyrene film |
| JPH0724911A (en) * | 1993-07-08 | 1995-01-27 | Toyobo Co Ltd | Syndyotactic polystyrene film |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0374437A (en) * | 1989-08-14 | 1991-03-29 | Idemitsu Kosan Co Ltd | Readily slippery film |
-
1992
- 1992-08-10 JP JP4212702A patent/JP2713338B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0374437A (en) * | 1989-08-14 | 1991-03-29 | Idemitsu Kosan Co Ltd | Readily slippery film |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2163573A1 (en) * | 2007-06-21 | 2010-03-17 | Teijin Limited | Insulating film |
| EP2163573A4 (en) * | 2007-06-21 | 2010-07-14 | Teijin Ltd | Insulating film |
| EP2434505A1 (en) * | 2007-06-21 | 2012-03-28 | Teijin Limited | Insulating film |
| US8859087B2 (en) | 2007-06-21 | 2014-10-14 | Teijin Limited | Insulating film |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2713338B2 (en) | 1998-02-16 |
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