JPH0664036A - Biaxially drawn film of syndiotactic polystyrene - Google Patents
Biaxially drawn film of syndiotactic polystyreneInfo
- Publication number
- JPH0664036A JPH0664036A JP22398092A JP22398092A JPH0664036A JP H0664036 A JPH0664036 A JP H0664036A JP 22398092 A JP22398092 A JP 22398092A JP 22398092 A JP22398092 A JP 22398092A JP H0664036 A JPH0664036 A JP H0664036A
- Authority
- JP
- Japan
- Prior art keywords
- film
- less
- syndiotactic polystyrene
- poly
- roll
- 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
- 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 excellent smoothness of the film surface and good handling characteristics regardless of the film thickness. The present invention relates to a biaxially stretched syndiotactic polystyrene 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、そのハンドリング
特性及び耐削れ特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。一方、これらの用途に於いては、フィルム
表面の平滑化や薄手化も要求されている。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、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
の接触等により、耐削れ特性不良によるフィルム表面の
擦り傷発生やロールへの白紛付着等の問題が生じる。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 used for these films, the handling property and the abrasion resistance property are major factors that determine the workability of the film processing process and the product quality. On the other hand, in these applications, smoothing and thinning of the film surface are also required. However, in the syndiotactic polystyrene biaxially stretched film, if the surface is simply smoothed and further thinned, the handling characteristics at the time of production and processing of the film become poor, and further, when the film is running, it becomes a guide roll. Due to such contact, scratches on the film surface due to poor abrasion resistance and adhesion of white powder to the roll occur.
【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接触によりフィルムに擦り傷
の発生やロールに白紛が付着する等の問題があった。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, there are problems such as scratches on the film and adhesion of white powder to the roll due to contact 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、更に走行時のフィルム表面に擦り傷の発生やロール
上に白粉の発生が生じない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 has excellent film surface smoothness,
And excellent handling properties regardless of the thickness of the film, further provides a good syndiotactic polystyrene-based biaxially stretched film with good abrasion resistance that does not cause scratches on the film surface during running or white powder on the roll. The purpose is to
【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1μ以上の突起が10個/mm2以下、1μm未満0.54μ
m以上の突起が200 個/cm2以下、三次元表面粗さSRa が
0.01μm以上0.05μm以下であり、S Δa が0.01μm以
上0.04μm以下、且つ空気抜け速さが500 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, the number of protrusions of 1 μ or more is 10 pieces / mm 2 or less on at least one side and less than 1 μm 0.54 μ.
200 protrusions / m 2 or less, 3D surface roughness SRa
Excellent in smoothness of film surface and related to film thickness, characterized by 0.01 μm or more and 0.05 μm or less, S Δa of 0.01 μm or more and 0.04 μm or less, and air bleeding speed of 500 seconds or less The present invention provides a syndiotactic polystyrene type biaxially stretched film which is excellent in handling property and has excellent abrasion resistance on the film surface.
【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SRa 及びS Δa 、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SRa 及びS Δa 、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0.01
μm以上2.0μm以下、特に0.05μm以上1.5μm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(%) 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10個/mm2以下、1μm未
満で0.54μm以上の突起が200個/mm2以下である事が好
ましい。1μm以上の突起が10個/mm2を越えると走行時
にフィルムから突起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、1μm未
満で0.54μm 以上の突起が200 個/mm2を越えると突起脱
落により、耐削れ特性が不良になる。0.54μ未満の突起
については特に限定されないが、擦り傷発生による耐削
れ特性の悪化及びハンドリング特性の悪化を防止するた
めには、0.54μ未満0.27μ以上の突起が100 個/mm2以上
であることが望ましい。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 SRa and 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 relationship between the protrusion height and the number of protrusions, the three-dimensional surface roughness SRa and S Δa, and the air bleeding speed fall within a predetermined range, silica, Examples of the particles include metal oxides such as titanium dioxide, talc, and kaolinite, salts of metals such as calcium carbonate, calcium phosphate, and barium sulfate, or particles inert to syndiotactic polystyrene-based polymers such as particles made 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 and 2.0 μm or less, particularly 0.05 μm or more and 1.5 μm or less, the degree of variation in particle size (the ratio of standard deviation to average particle size) is preferably 25% or less, and the addition amount is 100 parts by weight of syndiotactic polystyrene polymer. 0 for%.
The content is preferably 005% by weight or more and 2.0% by weight or less, and particularly 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) × 100 (%) In the polystyrene-based polymer used in the present invention, known antioxidants, antistatic agents, etc. may be added as necessary. It is possible to use a mixture containing a suitable amount of. The blending amount is preferably 10% by weight or less with respect to 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 may have protrusions on at least one side of 10 μm / mm 2 or less for 1 μm or more and 200 protrusions / mm 2 for less than 1 μm and 0.54 μm or more. preferable. If the number of protrusions having a size of 1 μm or more exceeds 10 / mm 2 , scratches and white powder are likely to occur due to the protrusions falling off from the film during running, resulting in poor abrasion resistance. Further, when the number of protrusions of less than 1 μm and 0.54 μm or more exceeds 200 / mm 2 , the protrusions fall off, resulting in poor abrasion resistance. The protrusions of less than 0.54μ are not particularly limited, but 100 protrusions / mm 2 or more of protrusions of less than 0.54μ and 0.27μ or more are required to prevent deterioration of abrasion resistance due to scratches and deterioration of handling properties. Is desirable.
【0012】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SRa は0.01μm以上0.05μm以下であることが必
要である。SRa が0.01μm未満ではハンドリング特性及
び耐削れ特性が不良になり、0.05μm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などの問題
が発生する。また、S Δaは0.01以上0.04以下であるこ
とが必要である。S Δaが0.01未満ではハンドリング特
性が不良になり、S Δa 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等の問題を生じ
る。Further, the syndiotactic polystyrene biaxially stretched film of the present invention needs to have a three-dimensional surface roughness SRa of at least one surface of 0.01 μm or more and 0.05 μm or less. If SRa is less than 0.01 μm, handling properties and abrasion resistance will be poor, and if it exceeds 0.05 μm, electromagnetic conversion properties will be poor in, for example, magnetic tape applications, and transparency will be reduced in photoengraving applications. Problems such as deterioration of withstand voltage characteristics occur in capacitor applications. Further, S Δa needs to be 0.01 or more and 0.04 or less. When S Δa is less than 0.01, the handling characteristics are poor, and when S Δa is more than 0.04, the electromagnetic conversion characteristics are poor in, for example, magnetic tape applications, and transparency is reduced in photography and plate making applications, which is not preferable, and film capacitors are used. In use, problems such as deterioration of withstand voltage characteristics occur.
【0013】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500 秒以下である必要がある。500 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500 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。Further, the air bleeding speed of at least one surface of the syndiotactic polystyrene type biaxially stretched film of the present invention must be 500 seconds or less. By setting the time to 500 seconds or less, a syndiotactic polystyrene type biaxially stretched film having good handling characteristics can be obtained regardless of the thickness and strength of the film even during high-speed work.
On the other hand, if the air bleed speed exceeds 500 seconds, the handling characteristics during high-speed work will be poor, and for example, when winding the film into a roll at high speed, air will be entrapped between the film and the take-up roll. Wrinkles are liable to occur, the winding shape becomes poor, and the film is meandered in the width direction due to the lubricating effect of the air layer in which the film is wound, resulting in uneven roll end surfaces.
【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。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.
【0015】(1)三次元表面粗さSRa,S Δa 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SRa、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。(1) Three-dimensional surface roughness SRa, S Δa Using a stylus-type three-dimensional surface roughness meter (SE-3AK, Kosaka Laboratory Ltd.) on the film surface, the radius of the needle is 2 μm and the load is
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, using an analyzer, SRa, SΔa
I asked. (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.
【0016】(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 倍の倍率で1m
m2の面積を観察し、突起高さに対応してできる干渉縞を
もつ突起を数えた。 (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(3) Number of protrusions on the film surface After thinly and uniformly depositing aluminum on the film surface,
1m at 400x magnification using Nache two-beam interference microscope
The area of m 2 was observed, and the projections having the interference fringes corresponding to the projection height were counted. (4) Film handling characteristics When slitting a wide slit roll at a high speed and rewinding it into a small roll, whether there is no problem with roll misalignment at the end of the roll, wrinkles, valves, etc.
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
【0017】(5)フィルムの耐削れ特性 フィルムを細幅にスリットしたテープ上ロールを金属製
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
白紛のロールへに付着量を5段階評価し、次のランク付
けで表わす。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、白紛発生非常に多い 2級;擦り傷かなり多い、白紛発生多い 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(5) Scratch resistance of film When the tape roll having a narrow slit in the film is rubbed against a metal guide roll to run, the amount of scratches generated after rubbing the guide roll against a constant supply tension And the amount of white powder adhered to the roll are evaluated on a scale of 5 and represented by the following rankings. When the evaluation results for scratches and white powder are different, the worse result of the two is adopted. 1st grade: Many scratches, white powder is very much generated 2nd grade: Many scratches, white powder is often generated 3rd class: Scratches are slightly present, white powder is slightly present 4th class: Almost no scratches, white powder is almost 5th grade; No scratches, no white powder
【0018】(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)×100
(%) (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(%)(6) Average particle size Lubricant particles are observed by a scanning electron microscope S-510 manufactured by Hitachi, Ltd., and photographed ones are magnified and copied to trace the external shape of the lubricant and optionally to 200 The individual 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. Variability = (standard deviation of particle size / average particle size) x 100
(%) (7) Area shape factor 20 particles are arbitrarily selected from the trace image used to measure 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) x 100 (%)
【0019】実施例 滑剤として、平均粒子径1.2 μm、ばらつき度20%、面
積形状係数75%のシリカ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、71μm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850 ℃の赤外線加熱ヒーターを3本使用し、更
に加熱し、フィルム温度138 ℃で縦方向に3.6 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6μmであった。得ら
れたフィルムの測定結果を表に示す。Example As a lubricant, silica having an average particle size of 1.2 μm, a degree of variation of 20% and an area shape factor of 75% was used with respect to 100% by weight of syndiotactic polystyrene (weight average molecular weight 300000).
After mixing the polymer chip added with the weight% and the polymer chip not added with the lubricant in a weight ratio of 1: 9, dried, melted at 295 ° C., and extruded from a T die with a 200 μm lip gap, A 71 μm amorphous sheet was obtained by adhering to a chill roll at 40 ° C by electrostatic loading and then solidifying by cooling. The amorphous sheet is first preheated to 95 ° C by a roll,
Using three infrared heaters with a surface temperature of 850 ℃, further heating, and stretching at a film temperature of 138 ℃ 3.6 times in the machine direction, then preheat the film to 120 ℃ with a tenter, and stretching temperature 120 ℃ in the transverse direction. The film was stretched 3.3 times at 260 ° C. and heat set at 260 ° C. The thickness of the obtained film was 6 μm. The measurement results of the obtained film are shown in the table.
【0020】比較例 滑剤粒子のシリカのばらつき度を40%とした以外は実施
例と同様の操作を行なった。得られたフィルムの評価結
果を表に示す。Comparative Example The same operation as in Example was carried out except that the degree of silica dispersion of the lubricant particles was set to 40%. The evaluation results of the obtained film are shown in the table.
【0021】[0021]
【表1】 [Table 1]
【0022】[0022]
【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、フィルムの表面が平滑で、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、更にフィルム表面の
耐削れ性が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 surface of the film is smooth and the handling property is good regardless of the thickness of the film. Further, a syndiotactic polystyrene biaxially stretched film having 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.
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 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 (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 (72) Inventor Tadashi Okuhira 2-1-1 Katata, Otsu City, Shiga Prefecture Toyobo Co., Ltd.
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10個/mm2以下、1μm未満0.54μm以上の突
起が200 個/mm2以下、三次元表面粗さSRa が0.01μm以
上0.05μm以下であり、S Δa が0.01以上0.04以下であ
り、更に、空気抜け速さが500 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系二軸延伸フィ
ルム。1. A styrene-based polymer having a substantially syndiotactic structure, and at least one projection having a size of 1 μ or more is 10 pieces / mm 2 or less and a projection having a size of less than 1 μm and 0.54 μm or more is 200 pieces / mm 2 or less. The three-dimensional surface roughness SRa is 0.01 μm or more and 0.05 μm or less, the S Δa is 0.01 or more and 0.04 or less, and the air bleeding speed is 500 seconds or less. Axial stretched film.
Priority Applications (1)
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JP22398092A JP3287418B2 (en) | 1992-08-24 | 1992-08-24 | Syndiotactic polystyrene biaxially stretched film |
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Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22398092A JP3287418B2 (en) | 1992-08-24 | 1992-08-24 | Syndiotactic polystyrene biaxially stretched film |
Publications (2)
Publication Number | Publication Date |
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JPH0664036A true JPH0664036A (en) | 1994-03-08 |
JP3287418B2 JP3287418B2 (en) | 2002-06-04 |
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ID=16806693
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JP22398092A Expired - Fee Related JP3287418B2 (en) | 1992-08-24 | 1992-08-24 | Syndiotactic polystyrene biaxially stretched film |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0685765B1 (en) * | 1994-06-03 | 2000-09-06 | Du Pont De Nemours (Deutschland) Gmbh | Monochromatic and polychromatic proofs of high resolution masters and process and means of their preparation |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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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 |
-
1992
- 1992-08-24 JP JP22398092A patent/JP3287418B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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EP0685765B1 (en) * | 1994-06-03 | 2000-09-06 | Du Pont De Nemours (Deutschland) Gmbh | Monochromatic and polychromatic proofs of high resolution masters and process and means of their preparation |
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