JPH06100711A - Syndiotactic polystyrenic biaxially oriented film - Google Patents
Syndiotactic polystyrenic biaxially oriented filmInfo
- Publication number
- JPH06100711A JPH06100711A JP4251311A JP25131192A JPH06100711A JP H06100711 A JPH06100711 A JP H06100711A JP 4251311 A JP4251311 A JP 4251311A JP 25131192 A JP25131192 A JP 25131192A JP H06100711 A JPH06100711 A JP H06100711A
- Authority
- JP
- Japan
- Prior art keywords
- film
- syndiotactic
- biaxially oriented
- oriented film
- 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.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は耐熱性および耐摩耗性に
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、さらに詳しく言えば、150 ℃以上での寸法安定性
に優れかつフィルム走行時の擦り傷や摩耗粉の発生が極
めて少ない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。TECHNICAL FIELD The present invention relates to a biaxially stretched syndiotactic polystyrene film having excellent heat resistance and abrasion resistance, and more specifically, it has excellent dimensional stability at 150 ° C. or higher and scratches when the film is running. The present invention relates to a syndiotactic polystyrene type biaxially stretched film in which generation of abrasion powder is extremely small.
【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、コンデンサー用、写真製版用、包装用
等、各種のフィルム用途に展開が期待されてる。特に近
年上記分野においては、表面が超平滑で、かつ高度に耐
熱性が良好なフィルムが強く要求されている。しかし、
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、単に表面を超平滑化し、且つ薄手化したので
は、フィルム走行時のガイドロール等との接触において
滑り性不良のため、擦り傷や削れによる白紛等が発生す
ると言う耐摩耗性が不良となる。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は脆く、耐熱性を
良好にするために熱固定温度を高くすることにより、更
に脆さが増し、フィルムの走行時の削れが増大する。シ
ンジオタクチックポリスチレン系二軸延伸フィルムを用
いた、透明性、耐熱性の優れたフィルムは次のものが知
られている（特開平1-316246、特開平1-168709、特開平
2-279731) 。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, capacitors, photolithography, and packaging. In recent years, in particular, there has been a strong demand in recent years for a film having a super-smooth surface and excellent heat resistance. But,
In the case of syndiotactic polystyrene biaxially stretched film, if the surface is simply made ultra-smooth and thin, the slipperiness of contact with guide rolls etc. during running of the film is poor, so white powder due to abrasion or scraping etc. The abrasion resistance is said to be poor. Further, the syndiotactic polystyrene biaxially stretched film is brittle, and by increasing the heat setting temperature in order to improve the heat resistance, the brittleness is further increased and the abrasion of the film during running is increased. The following films known to have excellent transparency and heat resistance using a syndiotactic polystyrene biaxially stretched film are known (JP-A-1-316246, JP-A-1-168709, JP-A-1-168709).
2-279731).
【０００３】[0003]
【発明が解決しようとする課題】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
面に擦り傷や白紛等が発生しやすく、耐摩耗性不良の問
題があった。特に、シンジオタクチックポリスチレン系
二軸延伸フィルムにおいては、その耐熱性を優れたもの
とするため、高温で長時間にわたる熱固定処理を行なう
が、これが脆さを更に増大させる結果となり、耐削れ性
不良の原因となっていた。本発明は、耐摩耗性と耐熱性
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
ィルムを提供することを目的とする。Since the syndiotactic polystyrene biaxially stretched film is brittle, scratches and white powder are likely to occur on the film surface due to friction with rolls during production and processing of the film, resulting in abrasion resistance. There was a problem of poor sex. In particular, the syndiotactic polystyrene biaxially stretched film is subjected to heat setting treatment at high temperature for a long time in order to make it excellent in heat resistance, but this results in further increase in brittleness, resulting in abrasion resistance. It was the cause of the defect. An object of the present invention is to provide a syndiotactic polystyrene type biaxially stretched film having excellent abrasion resistance and heat resistance.
【０００４】[0004]
【課題を解決するための手段】本発明者らは耐熱性と耐
摩耗性を共に満足させるべく鋭意研究の結果、シンジオ
タクチックポリスチレン分子鎖の配向と結晶子の配向を
或る範囲に在らしめることにより耐熱性と耐摩耗性を共
に満足させることが可能であることを見いだし、本発明
に到達したものである。即ち、本発明は下記式によって
求められる配向比が0.6 〜1.8 であるとともに広角Ｘ線
回折において20.6゜にある結晶回折ピークを用いて評価
した結晶子の方位角方向における分布が極大値付近で2
つに***することを特徴とする耐熱性および耐摩耗性に
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
ルムを提供するものである。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。Means for Solving the Problems As a result of intensive studies to satisfy both heat resistance and abrasion resistance, the present inventors found that the orientation of syndiotactic polystyrene molecular chains and the orientation of crystallites are within a certain range. The inventors have found that it is possible to satisfy both heat resistance and wear resistance by squeezing, and have reached the present invention. That is, according to the present invention, the distribution in the azimuth direction of the crystallite evaluated by using the crystal diffraction peak at 20.6 ° in wide-angle X-ray diffraction is 2 in the vicinity of the maximum value when the orientation ratio obtained by the following formula is 0.6 to 1.8.
Disclosed is a syndiotactic polystyrene-based biaxially stretched film having excellent heat resistance and abrasion resistance, which is characterized by being split into two parts. The polystyrene polymer with stereoregularity having a syndiotactic structure used in the present invention has a tacticity of diad (two constitutional units) in which a phenyl group or a substituted phenyl group which is a side chain is quantified by a nuclear magnetic resonance method. It is desirable that the syndiotactic structure is 85% or more, and pentad (5 constitutional units) is 50% or more.
【０００５】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).
【０００６】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。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50,000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
加に伴う破断の発生などが生じるため余り好ましくな
い。本発明の二軸延伸シンジオタクチックポリスチレン
はシンジオタクチックポリスチレンを常法で溶融押し出
しした後、逐次または同時二軸延伸を行い、更に必要に
応じ再度縦または横方向に延伸を行った後150 〜280 ℃
の温度で熱固定することによって得られるものである
が、その最大の特徴は該フィルムの分子配向と結晶配向
がある特定範囲内にあることである。In the present invention, polystyrene is particularly preferable among the polystyrene polymers. Also,
The polystyrene 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 polymer having an atactic structure or an isotactic structure is used. It may be a mixture of, a copolymer and a mixture thereof. The polystyrene-based polymer used in the present invention has a weight average molecular weight of 10,000 or more, more preferably 50,000 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. The upper limit of the weight average molecular weight is not particularly limited, but if it is 1500,000 or more, breakage occurs due to an increase in stretching tension, which is not preferable. The biaxially stretched syndiotactic polystyrene of the present invention is obtained by melt-extruding the syndiotactic polystyrene by a conventional method, and then sequentially or simultaneously biaxially stretching it, and further stretching the film in the longitudinal or transverse direction as necessary 150- 280 ℃
It is obtained by heat-setting at a temperature of, but the greatest feature is that the molecular orientation and crystal orientation of the film are within a certain range.
【０００７】赤外吸収法により求められる分子配向はシ
ンジオタクチックポリスチレン分子鎖の主鎖がトランス
コンフォメーションによりどの程度並び揃っているかを
結晶部・非晶部をあわせた系全体として評価するパラメ
ーターである。この値が１に近づくほど分子鎖は等方的
に存在し、０に近づくほどＴＤ方向に配向し、１より大
きくなるに従ってＭＤ方向に配向していることを表して
いる。発明者らは、この赤外吸収法により求めた分子配
向が熱収縮率と極めて相関が強いことを見いだし、この
値が請求範囲より大きくなると、ＭＤ方向の熱収縮率が
許容範囲を越え高温時の寸法安定性が良好なフィルムが
得られず、またこの値が上記範囲より小さくなると、Ｔ
Ｄ方向の熱収縮率が許容範囲を越え高温時の寸法安定性
が良好なフィルムが得られない。次に、本発明のシンジ
オタクチックポリスチレンフィルムは広角Ｘ線回折にお
いて20.6゜にある結晶回折ピークを用いて評価した結晶
子の方位角方向における分布曲線が極大値付近で２つに
***することが必要である。この結晶配向はシンジオタ
クチックポリスチレン結晶子の配向の程度を表してお
り、方位角方向の分布曲線が極大値付近で***せずに１
つのピークのみを与えることは、結晶子がその方向に極
度に配向していることを示し、その結果、本来よりもつ
シンジオタクチックポリスチレンの脆さが顕著になり、
配向方向に非常に裂けやすくなるため、耐削れ性等に代
表される耐摩耗性が悪化する。発明者らは該配向分布を
極大値付近で２つに***させることによりそのような脆
さに起因する耐摩耗性の改善がはかれることを見いだし
た。The molecular orientation determined by the infrared absorption method is a parameter for evaluating how much the main chains of syndiotactic polystyrene molecular chains are aligned by transconformation as a whole system including a crystal part and an amorphous part. is there. It is shown that the molecular chains are isotropically present as the value approaches 1 and are oriented in the TD direction as the value approaches 0, and are oriented in the MD direction as the value becomes greater than 1. The inventors have found that the molecular orientation determined by the infrared absorption method has a very strong correlation with the heat shrinkage ratio, and when this value exceeds the claimed range, the heat shrinkage ratio in the MD direction exceeds the allowable range and at high temperature. If a film having good dimensional stability is not obtained, and if this value is smaller than the above range, T
The heat shrinkage in the D direction exceeds the allowable range, and a film having good dimensional stability at high temperature cannot be obtained. Next, in the syndiotactic polystyrene film of the present invention, the distribution curve in the azimuth direction of the crystallite evaluated using the crystal diffraction peak at 20.6 ° in wide-angle X-ray diffraction may be split into two near the maximum value. is necessary. This crystal orientation represents the degree of orientation of the syndiotactic polystyrene crystallite, and the distribution curve in the azimuth direction does not split near the maximum value and
Giving only two peaks indicates that the crystallites are extremely oriented in that direction, and as a result, the brittleness of the syndiotactic polystyrene becomes more pronounced than it should be.
Since it is very easy to tear in the orientation direction, wear resistance represented by abrasion resistance is deteriorated. The inventors have found that by splitting the orientation distribution into two in the vicinity of the maximum value, the abrasion resistance due to such brittleness can be improved.
【０００８】[0008]
【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）分子配向 シンジオタクチックポリスチレン分子鎖の分子配向の測
定は1222cm-1にある赤外吸収バンドがトランスコンフォ
メーションに起因する報告に従って行った。パーキンエ
ルマー赤外分光光度計を用いて、偏光赤外に対する試料
の傾きを変え、吸収強度を測定した。1222cm-1の光で、
入射光の電気ベクトルがフィルムの幅方向と一致した時
の吸収強度を1182cm-1バンドで規格化した値をAx、フィ
ルムの長手方向と一致した時の吸収強度を1182cm-1バン
ドで規格化した値をAyとすると、分子配向はAx/Ay で定
義される。EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples. The evaluation method of the film is shown below. (1) Molecular Orientation The molecular orientation of syndiotactic polystyrene molecular chains was measured according to the report that the infrared absorption band at 1222 cm −1 was due to transconformation. Using a Perkin Elmer infrared spectrophotometer, the inclination of the sample with respect to polarized infrared was changed and the absorption intensity was measured. 1222 cm -1 of light,
The absorption intensity when the electric vector of the incident light coincided with the width direction of the film was standardized in the 1182 cm -1 band as Ax, and the absorption intensity when it coincided with the longitudinal direction of the film was normalized in the 1182 cm -1 band. If the value is Ay, the molecular orientation is defined by Ax / Ay.
【０００９】（２）結晶配向分布 二軸延伸フィルムを約５００μｍの厚さになるように積
層して、Ｘ線回折用の試料とし、Ｘ線回折装置（理学電
機（株）製 Rotaflex) の試料ホルダーに設置する。フ
ィルム面と垂直にＸ線を入射した場合をθ＝０゜とし、
入射Ｘ線の延長線上に検出器がある場合を２θ＝０゜と
する。まず、走査面とフィルムの幅方向が平行になるよ
うに試料を設置し、この状態を方位角χ＝０゜とする。
この状態で２θをスキャンして２θ＝20.6゜付近にみら
れる結晶回折ピークの極大位置で検出器を固定する。こ
の状態でさらにθをスキャンして回折ピークの強度が極
大値をもつところでθを固定する。このようにしていわ
ゆる結晶面の面だしを行った上で方位角をスキャンし、
このときの結晶回折ピーク強度の方位角依存性を記録す
ると、これを結晶配向分布曲線と呼ぶ。(2) Crystal orientation distribution A biaxially stretched film was laminated so as to have a thickness of about 500 μm and used as a sample for X-ray diffraction, which was a sample of an X-ray diffractometer (Rotaflex, manufactured by Rigaku Denki Co., Ltd.). Install in the holder. When X-rays are incident perpendicularly to the film surface, θ = 0 °,
When the detector is on the extension of the incident X-ray, 2θ = 0 °. First, the sample is set so that the scanning surface and the width direction of the film are parallel to each other, and this state is set to an azimuth angle χ = 0 °.
In this state, scan 2θ and fix the detector at the maximum position of the crystal diffraction peak seen near 2θ = 20.6 °. In this state, θ is further scanned and θ is fixed when the intensity of the diffraction peak has a maximum value. In this way, the azimuth angle is scanned after the so-called crystal plane is set,
When the azimuth angle dependence of the crystal diffraction peak intensity at this time is recorded, this is called a crystal orientation distribution curve.
【００１０】（３）200 ℃における熱収縮率 200 ℃で30分放置後の熱収縮率を測定した。 （４）フィルムの耐摩耗性 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
張力に体してガイドロール擦過後のテープ張力の大小及
びガイドロール表面に発生する白紛量の多少をそれぞれ
５段階に評価し次のランク付けで表す。 １級；擦り傷多い、または白紛発生非常に多い ２級；擦り傷かなり多い、または白紛発生多い ３級；擦り傷ややあり、または白紛発生ややあり ４級；擦り傷ほとんどなし、または白紛発生ほとんどな
し ５級；擦り傷発生なし、または白紛発生なし ここで、擦り傷と白紛発生量の得られた結果のランクが
異なる場合、悪いほうのランクを採用する。(3) Thermal shrinkage at 200 ° C. The thermal shrinkage after standing at 200 ° C. for 30 minutes was measured. (4) Abrasion resistance of the film When the tape roll with the film slit into a narrow width is rubbed against the metal guide roll to run, the tape is adjusted to a constant supply tension and the tape tension after rubbing The amount of white powder generated on the surface of the roll is evaluated on a scale of 5 and is represented by the following ranking. 1st grade: Many scratches or white powder is generated very much 2nd grade: Many scratches or white powder is generated 3rd class: Scratches are slightly present or white powder is slightly generated 4th class: Almost no scratches or white powder is generated None 5th grade: No scratches or white powder is generated. Here, when the ranks of the obtained results of the scratches and the amount of white powder are different, the worse rank is adopted.
【００１１】実施例 滑剤として、平均粒子径0.8 μｍ、ばらつき度20％、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2.0 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 ℃で溶融押し出し冷却固化
し、無定形シートを得た。該無定形シートをまず赤外線
加熱ヒーターを複数個使用して140 ℃で縦方向に1.4 倍
延伸した後、120 ℃に加熱したロールを用いて縦方向に
2.2 倍延伸する。次にテンターで、横方向に120 ℃で3.
0 倍延伸し、240 ℃で熱固定した後、２３０℃で幅方向
に３％リラックスさせた。得られたフィルムは分子配向
が0.8 で、結晶配向分布曲線は図１に示すように２つに
***していた。このフィルムの熱収縮率は長手方向で1.
8 ％、幅方向で1.2 ％であり、耐摩耗性のランクは５級
であった。Example As a lubricant, a polymer prepared by adding 2.0% by weight of calcium carbonate having an average particle size of 0.8 μm, a degree of variation of 20% and an area shape factor of 75% to 100% by weight of syndiotactic polystyrene (weight average molecular weight 300000). Chips and polymer chips to which a lubricant was not added were mixed at a weight ratio of 1: 9, dried, melt-extruded at 295 ° C., cooled and solidified to obtain an amorphous sheet. The amorphous sheet was first stretched 1.4 times in the machine direction at 140 ℃ using multiple infrared heaters, and then stretched in the machine direction using a roll heated to 120 ℃.
2.2 Stretch twice. Then in a tenter, laterally at 120 ° C 3.
The film was stretched 0 times, heat-set at 240 ° C., and then relaxed at 230 ° C. in the width direction by 3%. The obtained film had a molecular orientation of 0.8 and the crystal orientation distribution curve was split into two as shown in FIG. The heat shrinkage of this film is 1.
8%, 1.2% in the width direction, and the rank of wear resistance was grade 5.
【００１２】比較例 実施例で用いた無定形シートを130 ℃に加熱したロール
を用いて縦方向に3.1倍延伸する。次にテンターで横方
向に130 ℃で3.5 倍延伸し、270 ℃で熱固定した後、２
３０℃で幅方向に３％リラックスさせた。得られたフィ
ルムは分子配向が0.9 で、結晶配向分布曲線は図２に示
すように***せずに１つのピークのみを与えた。このフ
ィルムの熱収縮率は長手方向で5.3 ％、幅方向で2.7 ％
であり、耐摩耗性のランクは２級であった。Comparative Example The amorphous sheet used in the examples is stretched 3.1 times in the machine direction by using a roll heated to 130 ° C. Next, it was stretched 3.5 times in the transverse direction at 130 ℃ with a tenter and heat set at 270 ℃, then 2
It was relaxed by 3% in the width direction at 30 ° C. The obtained film had a molecular orientation of 0.9, and the crystal orientation distribution curve gave only one peak without splitting as shown in FIG. The heat shrinkage of this film is 5.3% in the longitudinal direction and 2.7% in the width direction.
And the rank of abrasion resistance was the second grade.
【００１３】[0013]
【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、耐熱性および耐摩耗性に極めて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であると言うこ
とができる。As described above, according to the present invention, by adopting the constitution as set forth in the claims, a syndiotactic polystyrene biaxially stretched film having extremely excellent heat resistance and abrasion resistance. Can be said to be.
【図１】図１は実施例で得られたフィルムの結晶配向分
布曲線である。FIG. 1 is a crystal orientation distribution curve of a film obtained in an example.
【図２】図２は比較例で得られたフィルムの結晶配向分
布曲線である。FIG. 2 is a crystal orientation distribution curve of a film obtained in a comparative example.
Azimuthal angle ：フィルムの方位角 Intensity ：結晶回折強度 Azimuthal angle: Film azimuth Intensity: Crystal diffraction intensity
───────────────────────────────────────────────────── 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 Ｃ０８Ｌ 25:00 9166−4Ｊ (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 code Internal reference number FI technical display location C08L 25:00 9166-4J (72) Inventor Tadashi Okudaira 1-2-1 Katata, Otsu City, Shiga Prefecture Toyobo Co., Ltd.
Claims (1)
るスチレン系重合体から成り、下記式によって求められ
る配向比が0.6 〜1.8 であり、且つ広角Ｘ線回折におい
て20.6゜にある結晶回折ピークを用いて評価した結晶子
の方位角方向における分布が極大値付近で２つに***す
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。 配向比＝Ax/Ay Ax：赤外光の偏光方向がフィルムの幅方向と一致した時
の1222cm-1バンド強度 Ay：赤外光の偏光方向がフィルムの長手方向と一致した
時の1222cm-1バンド強度1. A crystal diffraction peak consisting of a styrene-based polymer having a substantially syndiotactic structure, having an orientation ratio of 0.6 to 1.8 determined by the following formula, and having a wide-angle X-ray diffraction at 20.6 ° is used. A biaxially stretched syndiotactic polystyrene film, characterized in that the distribution of crystallites evaluated in the azimuth direction is split into two near the maximum value. Orientation ratio = Ax / Ay Ax: infrared light polarization direction 1222Cm -1 band intensity Ay when matched with the width direction of the film: the infrared light polarization direction when matched with the longitudinal direction of the film 1222Cm -1 Band strength
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4251311A JPH06100711A (en) | 1992-09-21 | 1992-09-21 | Syndiotactic polystyrenic biaxially oriented film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4251311A JPH06100711A (en) | 1992-09-21 | 1992-09-21 | Syndiotactic polystyrenic biaxially oriented film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06100711A true JPH06100711A (en) | 1994-04-12 |
Family
ID=17220923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4251311A Pending JPH06100711A (en) | 1992-09-21 | 1992-09-21 | Syndiotactic polystyrenic biaxially oriented film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06100711A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| JPH08323877A (en) * | 1995-05-29 | 1996-12-10 | Toyobo Co Ltd | Biaxially oriented film of syndiotactic polystyrene |
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|---|---|---|---|---|
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| 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 |
| JPH08323877A (en) * | 1995-05-29 | 1996-12-10 | Toyobo Co Ltd | Biaxially oriented film of syndiotactic polystyrene |
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