JPH0919959A - Polystyrene film - Google Patents
Polystyrene filmInfo
- Publication number
- JPH0919959A JPH0919959A JP16982995A JP16982995A JPH0919959A JP H0919959 A JPH0919959 A JP H0919959A JP 16982995 A JP16982995 A JP 16982995A JP 16982995 A JP16982995 A JP 16982995A JP H0919959 A JPH0919959 A JP H0919959A
- Authority
- JP
- Japan
- Prior art keywords
- film
- polystyrene
- less
- poly
- stretched
- 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
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- 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
スチレン系フィルム、さらに詳しく言えば、透明性に極
めて優れ、且つコーティング加工後の平面性、コピー機
の通過性に優れたポリスチレン系フィルムに関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a syndiotactic polystyrene film, and more particularly to a polystyrene film having extremely excellent transparency, flatness after coating and passing through a copying machine. is there.
【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、透明性などに優れた
ものが開発され(特開平1−110122号、同1−1
68709号、同1−182346号、同2−2797
31号、同3−74437号、同3−109453号、
同3−99828号、同3−124427号、同3−1
31644号、同3−131843号など)、磁気テー
プ用、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いる。特に耐熱性、透明性を活かし
た液晶表示用途やOHP用フィルム、写真フィルム等へ
の展開が期待されている。特に写真フィルムにおいて
は、透明性などの物性の優れたフィルムを得る方法とし
て、特開平3−13184において延伸、熱固定の条件
をフィルムの複屈折の絶対値‘Δn’が40×10-3以
下となるように調整することが示されている。2. Description of the Related Art Syndiotactic polystyrene biaxially stretched films have been developed that have excellent heat resistance, electrical properties, transparency, etc. (Japanese Patent Laid-Open Nos. 1-110122 and 1-11).
68709, 1-182346, 2-2797.
No. 31, No. 3-74437, No. 3-109453,
3-99828, 3-124427, 3-1
No. 31644, No. 3-131843, etc.), magnetic tapes, capacitors, packaging, and other various film applications. In particular, it is expected to be applied to liquid crystal display applications, OHP films, photographic films, etc., which take advantage of heat resistance and transparency. Particularly in a photographic film, as a method for obtaining a film having excellent physical properties such as transparency, the conditions for stretching and heat setting in JP-A-3-13184 are set so that the absolute value of the birefringence of the film'Δn 'is 40 × 10 -3 or less. It has been shown to be adjusted so that
【0003】[0003]
【発明が解決しようとする課題】しかしながらシンジオ
タクチックポリスチレン系のフィルムは、他の素材(例
えば偏光板、ゼラチン乳剤、コピー用トナー)との接着
性が悪いという欠点があった。そこで、後加工、即ち、
易接着性向上等を目的としたコーティングを施す必要が
あるが、これまでのシンジオタクチックポリスチレン系
二軸延伸フィルムにおいては、コーティングや蒸着を施
した後に平面性が損なわれるという問題があった。ま
た、OHP用フィルムとしてコピー機に通す場合の通過
性にも問題があった。これらの問題を解決するためにフ
ィルムの腰を強くしたり、熱収縮率を低減した場合、透
明性が不良となり、特開平3−13184に示された延
伸、熱固定の条件をフィルムの複屈折の絶対値‘Δn’
が40×10-3以下となるように調整する方法において
も、かならずしも良好な透明性を得ることが出来なかっ
た。本発明は、透明性に優れ、且つコーティング加工後
の平面性、コピー機の通過性に優れたポリスチレン系フ
ィルムを提供することを目的としている。However, the syndiotactic polystyrene film has a drawback in that it has poor adhesion to other materials (for example, a polarizing plate, a gelatin emulsion, a copying toner). Therefore, post-processing, that is,
Although it is necessary to apply a coating for the purpose of improving easy adhesion, the conventional biaxially stretched syndiotactic polystyrene film has a problem that the flatness is impaired after the coating or vapor deposition. Further, there is a problem in the passability when passing through a copier as an OHP film. When the stiffness of the film is strengthened or the heat shrinkage ratio is reduced to solve these problems, the transparency becomes poor, and the stretching and heat setting conditions shown in JP-A-3-13184 are set to the birefringence of the film. Absolute value of'Δn '
It was not always possible to obtain good transparency even in the method of adjusting so that the value was 40 × 10 −3 or less. An object of the present invention is to provide a polystyrene-based film which is excellent in transparency, flatness after coating and passing property in a copying machine.
【0004】[0004]
【課題を解決するための手段】本発明のポリスチレン系
フィルムはシンジオタクチック構造を有するスチレン系
重合体からなるフィルムで、ヘイズが1%以下であり、
さらに面配向度(ΔP)が−0.04以下、−0.06
以上であることを特徴とする透明性に優れ、且つコーテ
ィング加工後の平面性、コピー機の通過性に優れたポリ
スチレン系フィルムを提供するものである。The polystyrene film of the present invention is a film made of a styrene polymer having a syndiotactic structure and has a haze of 1% or less,
Further, the degree of plane orientation (ΔP) is −0.04 or less, −0.06.
The present invention provides a polystyrene film having excellent transparency, flatness after coating, and excellent passability of a copying machine.
【0005】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ィシティがダイアッド(構成単位が
2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-based polymer having stereoregular syndiotactic structure used in the present invention has a tacticity in which the side chain phenyl group or substituted phenyl group is quantified by a nuclear magnetic resonance method, which is a diad (constituent unit). 85% or more for 2) and 50 for pentad (5 units)
% Or more of the syndiotactic structure.
【0006】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
ルエーテル)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。The polystyrene-based polymer includes polystyrene, poly (p-, m- or o-methylstyrene), poly (2,4-, 2,5-, 3,4- or 3,5-dimethylstyrene). ), Poly (alkylstyrene) such as poly (p-tert-butylstyrene), 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-vinylbenzylpropylether), poly (alkylsilylstyrene) such as poly (p-trimethylsilylstyrene), Examples include poly (vinylbenzyldimethoxyphosphide) and the like.
【0007】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、1,500,000 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。In the present invention, among the polystyrene polymers, polystyrene is particularly preferred. Also,
The polystyrene-based polymer having a syndiotactic structure used in the present invention does not necessarily need to be a single compound. Or copolymers and mixtures 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. If the weight average molecular weight is less than 10,000, it is not possible to obtain a 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 1,500,000 or more, it is not so preferable because breakage occurs due to an increase in stretching tension.
【0008】本発明に用いられるシンジオタクチックポ
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、滑り性を付与するための微粒子等を適
量配合したものを用いることができる。配合量はシンジ
オタクチック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
破断を起こしやすくなり、生産安定性不良となるので好
ましくない。The syndiotactic polystyrene-based polymer used in the present invention may contain, if necessary, known compounds such as antioxidants, antistatic agents, and fine particles for imparting slipperiness. it can. The compounding amount is based on 100% by weight of the syndiotactic polystyrene polymer.
10% by weight or less is desirable. If it exceeds 10% by weight, breakage easily occurs during stretching, resulting in poor production stability.
【0009】そして、前記のヘイズおよび面配向(Δ
P)は、フィルムの製膜条件により調整される。得られ
たフィルムのヘイズおよび面配向(ΔP)が所定の範囲
に入るならば延伸方法は特に限定されないが、縱方向に
低倍率の延伸を数回繰り返し高倍率に延伸した後横方向
に延伸することが望ましい。好ましくは縦方向に2段
に、更に好ましくは縦方向に3段延伸後、横方向に延伸
する方法があるが、これに限定にさるものではない。横
方向の延伸も多段に行なうのが好ましい。また、ヘイ
ズ、面配向(ΔP)および熱収縮率を所定の範囲に入れ
るためには熱固定処理、縦弛緩処理、横弛緩処理などを
施すことが必要である。また、接着特性等を向上するた
めに、インラインコートやオフラインコートにより接着
層を設けたり、コロナ処理や火炎プラズマ処理等を行う
ことができる。The haze and the plane orientation (Δ
P) is adjusted depending on the film forming conditions. The stretching method is not particularly limited as long as the haze and plane orientation (ΔP) of the obtained film fall within predetermined ranges, but stretching at low magnification in the vertical direction is repeated several times to stretch at high magnification, and then stretching in the transverse direction. Is desirable. There is preferably a method of stretching in two stages in the machine direction, more preferably three stages in the machine direction and then stretching in the transverse direction, but the method is not limited to this. Stretching in the transverse direction is also preferably carried out in multiple stages. Further, in order to bring the haze, the plane orientation (ΔP) and the heat shrinkage rate into the predetermined ranges, it is necessary to carry out heat setting treatment, longitudinal relaxation treatment, transverse relaxation treatment and the like. Further, in order to improve the adhesive property and the like, an adhesive layer may be provided by in-line coating or off-line coating, corona treatment, flame plasma treatment, or the like.
【0010】本発明のポリスチレン系フィルムのヘイズ
は1%以下であり、好ましくは0.8以下、更に好まし
くは0.5以下である。ヘイズが1%より大きくなる
と、例えば液晶表示用途の偏光板用保護フィルムとして
使用された場合、表示画面の見やすさが低下する。The haze of the polystyrene film of the present invention is 1% or less, preferably 0.8 or less, more preferably 0.5 or less. When the haze is more than 1%, the visibility of the display screen is deteriorated when used as a protective film for a polarizing plate for liquid crystal displays, for example.
【0011】また、本発明のポリスチレン系フィルムの
面配向(ΔP)は−0.04以下、−0.06以上、好
ましくは−0.045以下、−0.058以上、更に好
ましくは0.047以下、0.057以下である。面配
向(ΔP)が−0.04より大きい場合コーティング加
工後の平面性、コピー機の通過性が不良となる。更に、
面配向(ΔP)が−0.04より大きい場合ヘイズを1
%以下にすることが困難になる。また、面配向(ΔP)
が−0.06未満の場合にもヘイズを1%以下にするこ
とが困難になる。更に、150℃における熱収縮率は2
%以下、好ましくは1.8%以下、更に好ましくは1.
5%以下である。150℃における熱収縮率が2%より
大きいとコーティング後の平面性やコピー機通過性が不
良となる。The plane orientation (ΔP) of the polystyrene film of the present invention is -0.04 or less, -0.06 or more, preferably -0.045 or less, -0.058 or more, more preferably 0.047. Below, it is below 0.057. If the plane orientation (ΔP) is larger than −0.04, the flatness after coating and the passability of the copier become poor. Furthermore,
If the plane orientation (ΔP) is larger than -0.04, haze is 1
It will be difficult to keep the percentage below. Also, plane orientation (ΔP)
Is less than -0.06, it is difficult to reduce the haze to 1% or less. Furthermore, the heat shrinkage at 150 ° C is 2
% Or less, preferably 1.8% or less, more preferably 1.
5% or less. If the heat shrinkage ratio at 150 ° C. is more than 2%, the flatness after coating and the passability through a copying machine become poor.
【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. The evaluation method of the film is shown below.
【0012】(1)フィルムヘーズ JIS-K6714 に準じ、日本精密光学株式会社製ポイック積
分球式HTR メータSEP-H2D 形によりヘーズを求めた。(1) Film haze According to JIS-K6714, the haze was determined by a Poic integrating sphere type HTR meter SEP-H2D type manufactured by Nippon Seimitsu Optical Co., Ltd.
【0013】(2)面配向(ΔP) アタゴ光学社製アッベ屈折計4Tを用い、屈折率を長手
方向(Nx)、幅方向(Ny)および厚み方向(Nz)
について測定し、それら3方向の屈折率を用い下式によ
り算出した。 ΔP=(Nx+Ny)/2−Nz(2) Plane orientation (ΔP) Using an Abbe refractometer 4T manufactured by Atago Optical Co., Ltd., the refractive index was measured in the longitudinal direction (Nx), the width direction (Ny) and the thickness direction (Nz).
Was measured, and the refractive index in these three directions was used to calculate by the following formula. ΔP = (Nx + Ny) / 2−Nz
【0014】(3)150℃における熱収縮率 無張力の状態で150℃の雰囲気中に30分間放置し、
放置前後の寸法変化を読み取り、フィルムの熱収縮率を
求めた。(3) Heat shrinkage rate at 150 ° C. Leave for 30 minutes in an atmosphere of 150 ° C. without tension,
The dimensional change before and after standing was read to determine the heat shrinkage rate of the film.
【0015】(4)液晶表示画面の見やすさ 偏光フィルムの一方の面に厚さ75μmの本発明で得ら
れたポリスチレン系フィルムを貼り、他方の面に厚さ7
5μmのトリアセチルセルロースフィルムを貼った偏光
板を、液晶基板側がトリアセチルセルロースフィルム面
となるように張り合わせ液晶表示装置を作成した。液晶
表示画面の見やすさを以下に示す様な3段階評価を行っ
た。 ○;見やすさ良好 △;見やすさ普通 ×;見やすさ不良(4) Visibility of liquid crystal display screen A polystyrene film having a thickness of 75 μm obtained by the present invention is adhered to one surface of a polarizing film, and a thickness of 7 is applied to the other surface.
A polarizing plate to which a 5 μm triacetyl cellulose film was stuck was laminated so that the liquid crystal substrate side faced the triacetyl cellulose film side to prepare a liquid crystal display device. The visibility of the liquid crystal display screen was evaluated by the following three grades. ○: Easy to see △: Easy to see ×: Poor to see
【0016】(5)コーティング後の平面性 竹本油脂(株)製TIE51を10番手のワイヤーバー
を用いてハンドコートし、150℃の雰囲気下で乾燥し
た。得られたフィルムを次の基準に従い、1級〜5級の
ランク付けを行った。 1級;強い張力をかけても波打ち全面にあり 2級;強い張力をかけても波打ち一部あり 3級;強い張力をかけると波打ちなし 4級;弱い張力をかけると波打ちなし 5級;張力をかけなくても波打ちなし(5) Flatness after coating TIE51 manufactured by Takemoto Yushi Co., Ltd. was hand coated using a 10th wire bar and dried in an atmosphere at 150 ° C. The obtained film was ranked according to the following criteria from 1st class to 5th class. 1st grade; there is a wavy surface even with strong tension 2nd grade; there is some wavy even with strong tension 3rd grade; no waviness when strong tension is applied 4th grade; no waviness when weak tension is applied 5th grade; tension No waviness without applying
【0017】(6)コピー機通過性 コートしたフィルムをB5サイズにカットし、(株)リ
コー製RICOPY FT6960内部を通過させた。
得られたフィルムを次の基準に従い、1級〜5級のラン
ク付けを行った。 1級;コピー機につまる等のトラブルあり 2級;フィルムにしわが入る 3級;平坦な場所に置いた場合に浮く部分がある 4級;平坦な場所に置いた場合に浮く部分がないが、定
規で測定すると寸法変化が認められる 5級;外観、寸法共に変化無し(6) Copier passability The coated film was cut into B5 size and passed through the inside of Riccopy FT6960 manufactured by Ricoh Co., Ltd.
The obtained film was ranked according to the following criteria from 1st class to 5th class. 1st grade; troubles such as clogging in the copying machine 2nd grade; wrinkles on the film 3rd grade; there is a part that floats when placed on a flat place 4th grade; there is no part that floats when placed on a flat place Dimensional changes are observed when measured with a ruler Grade 5: No change in appearance or dimensions
【0018】実施例1 シンジオタクチックポリスチレン(重量平均分子量25
0,000)を乾燥し、290℃で溶融し、1500μ
mのリップギャップのTダイから押し出し、50℃の冷
却ロールに静電印荷法により密着・冷却固化し、厚さ1
000μmの無定形シートを得た。該無定形シートを先
ず金属ロールにより90℃に予熱し、表面温度700℃
の反射した赤外線がフィルムに垂直に当たるように調整
したステンレス製の傘を有する直径10mmの棒状窒化
硅素製赤外線ヒータ3本で更に加熱し縱方向に1.4倍
延伸し、引き続き100℃に加熱したシリコンゴムロー
ルにフィルムを接触させ更に表面温度700℃の前記赤
外線ヒータで加熱し縱方向に1.4倍延伸し、引き続き
130℃に加熱したセラミックロールを用い縦方向に
1.8倍延伸した。次いで、テンターでフィルムを11
0℃に予熱し、横方向に延伸温度110℃で1.9倍延
伸し、更に120℃で横方向に2倍延伸した後、230
℃で20秒熱固定処理した。その後、200℃で2%横
弛緩処理し、更に170℃で1%横弛緩処理を行った。
得られたフィルムの厚みは75μmであった。得られた
フィルムの物性を表1に示す。Example 1 Syndiotactic polystyrene (weight average molecular weight 25
50,000) is dried, melted at 290 ° C., 1500 μ
Extruded from a T-die with a lip gap of m, adhered to a cooling roll at 50 ° C by an electrostatic loading method and solidified by cooling to a thickness of 1
An amorphous sheet of 000 μm was obtained. The amorphous sheet is first preheated to 90 ° C by a metal roll, and the surface temperature is 700 ° C.
Was further heated by three rod-shaped silicon nitride infrared heaters having a diameter of 10 mm and having a stainless steel umbrella adjusted so that the reflected infrared rays hit the film vertically, and then stretched 1.4 times in the vertical direction, and subsequently heated to 100 ° C. The film was brought into contact with a silicon rubber roll, further heated by the infrared heater having a surface temperature of 700 ° C., and stretched 1.4 times in the vertical direction, and subsequently stretched 1.8 times in the longitudinal direction using a ceramic roll heated to 130 ° C. Then, film the film with a tenter.
It is preheated to 0 ° C., stretched 1.9 times in the transverse direction at a stretching temperature of 110 ° C., and further stretched 2 times in the transverse direction at 120 ° C.
It was heat-set at 20 ° C. for 20 seconds. Then, 2% lateral relaxation treatment was performed at 200 ° C., and further 1% lateral relaxation treatment was performed at 170 ° C.
The thickness of the obtained film was 75 μm. Table 1 shows the physical properties of the obtained film.
【0019】実施例2 縦延伸を、先ず金属ロールにより90℃に予熱し、表面
温度700℃の赤外線ヒータで更に加熱し縱方向に1.
3倍延伸し、引き続き100℃に加熱したシリコンゴム
ロールにフィルムを接触させ更に表面温度700℃の前
記赤外線ヒータで加熱し縱方向に1.3倍延伸し、引き
続き120℃に加熱したシリコンゴムロールにフィルム
を接触させ更に表面温度700℃の前記赤外線ヒータで
加熱し縱方向に1.3倍延伸し引き続き135℃に加熱
したセラミックロールを用い縦方向に1.6倍延伸した
以外は実施例1と同様に行った。得られたフィルムの厚
みは75μmであった。得られたフィルムの物性を表1
に示す。Example 2 Longitudinal stretching was first preheated to 90 ° C. with a metal roll and further heated with an infrared heater having a surface temperature of 700 ° C. to 1.
The film was brought into contact with a silicon rubber roll which was stretched 3 times and subsequently heated to 100 ° C., further heated by the infrared heater having a surface temperature of 700 ° C., and stretched 1.3 times in the vertical direction, and subsequently, a film was formed on the silicon rubber roll which was heated to 120 ° C. Was contacted with and further heated by the infrared heater having a surface temperature of 700 ° C., stretched 1.3 times in the vertical direction, and subsequently stretched 1.6 times in the longitudinal direction using a ceramic roll heated to 135 ° C. Went to. The thickness of the obtained film was 75 μm. Table 1 shows the physical properties of the obtained film.
Shown in
【0020】比較例1 縦延伸を金属ロールにより90℃に予熱し表面温度70
0℃の赤外線ヒータで更に加熱し縱方向に3.5倍延伸
した。次いで、テンターでフィルムを115℃に予熱
し、横方向に延伸温度115℃で横方向に3.8倍延伸
した以外は実施例1と同様に行った。得られたフィルム
の厚みは75μmであった。得られたフィルムの物性を
表1に示す。Comparative Example 1 Longitudinal stretching was preheated to 90 ° C. with a metal roll and the surface temperature was 70
It was further heated by an infrared heater at 0 ° C. and stretched 3.5 times in the vertical direction. Then, the film was preheated to 115 ° C. with a tenter and stretched in the transverse direction at a temperature of 115 ° C. in the transverse direction by a factor of 3.8. The thickness of the obtained film was 75 μm. Table 1 shows the physical properties of the obtained film.
【0021】比較例2 シンジオタクチックポリスチレン(重量平均分子量25
0,000)を乾燥し、290℃で溶融し、1500μ
mのリップギャップのTダイから押し出し、50℃の冷
却ロールに静電印荷法により密着・冷却固化し、厚さ8
80μmの無定形シートを得た。該無定形シートを先ず
シリコンゴムロールにより120℃に予熱し縱方向に3
倍延伸し、次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倍延伸し、更にシリ
コンゴムロールにより120℃に予熱し縱方向に1.3
倍延伸した。その後、230℃で20秒熱固定処理し
た。得られたフィルムの厚みは75μmであった。得ら
れたフィルムの物性を表1に示す。Comparative Example 2 Syndiotactic polystyrene (weight average molecular weight 25
50,000) is dried, melted at 290 ° C., 1500 μ
Extruded from a T-die with a lip gap of m, adhered to a chill roll at 50 ° C by an electrostatic loading method and solidified by cooling, resulting in a thickness of 8
An 80 μm amorphous sheet was obtained. The amorphous sheet is first preheated to 120 ° C. by a silicon rubber roll and then rolled in a vertical direction for 3 minutes.
The film is double-stretched, then preheated to 120 ° C with a tenter, stretched 3 times in the transverse direction at a stretching temperature of 120 ° C, further preheated to 120 ° C with a silicon rubber roll, and then 1.3% in the vertical direction.
It was stretched twice. After that, heat setting treatment was performed at 230 ° C. for 20 seconds. The thickness of the obtained film was 75 μm. Table 1 shows the physical properties of the obtained film.
【0022】[0022]
【表1】 表1より、実施例1、2で得られたフィルムは透明性に
優れ、且つコーティング加工後の平面性、コピー機の通
過性に優れたものであることが分かる。[Table 1] From Table 1, it can be seen that the films obtained in Examples 1 and 2 are excellent in transparency, flatness after coating, and excellent in passing through a copying machine.
【0023】[0023]
【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、透明性に優れ、且つコーティング加工後の平面性、
コピー機の通過性に優れたポリスチレン系延伸フィルム
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, excellent transparency and flatness after coating,
A polystyrene stretched film excellent in the passability of a copying machine is provided, and therefore, the industrial value of the present invention is great.
Claims (3)
ン系重合体からなるフィルムで、ヘイズが1%以下であ
り、さらに下記式で表される面配向度(ΔP)が−0.
04以下、−0.06以上であることを特徴とするポリ
スチレン系フィルム。 ΔP=(Nx+Ny)/2−Nz1. A film made of a styrene-based polymer having a syndiotactic structure, having a haze of 1% or less, and having a degree of plane orientation (ΔP) of −0.
04 or less, -0.06 or more, a polystyrene film. ΔP = (Nx + Ny) / 2−Nz
あることを特徴とする請求項1記載のポリスチレン系フ
ィルム。2. The polystyrene film according to claim 1, which has a heat shrinkage ratio at 150 ° C. of 2% or less.
る請求項1または2記載のポリスチレン系フィルム。3. The polystyrene film according to claim 1, which has a thickness of 25 μm or more.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16982995A JPH0919959A (en) | 1995-07-05 | 1995-07-05 | Polystyrene film |
DE69625277T DE69625277T2 (en) | 1995-05-29 | 1996-05-29 | Oriented polystyrene film with isotactic configuration |
US08/654,583 US5707719A (en) | 1995-05-29 | 1996-05-29 | Oriented film including polystyrene polymer having syndiotactic configuration |
EP96108539A EP0745473B1 (en) | 1995-05-29 | 1996-05-29 | Oriented film including polystyrene polymer having syndiotactic configuration |
KR1019960018473A KR100390695B1 (en) | 1995-05-29 | 1996-05-29 | Oriented polystyrene-based film having a syndiotactic structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16982995A JPH0919959A (en) | 1995-07-05 | 1995-07-05 | Polystyrene film |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0919959A true JPH0919959A (en) | 1997-01-21 |
Family
ID=15893692
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16982995A Pending JPH0919959A (en) | 1995-05-29 | 1995-07-05 | Polystyrene film |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0919959A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012147777A1 (en) * | 2011-04-26 | 2012-11-01 | 帝人株式会社 | High-insulating film |
JP2012246372A (en) * | 2011-05-26 | 2012-12-13 | Teijin Ltd | High-insulating film |
-
1995
- 1995-07-05 JP JP16982995A patent/JPH0919959A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012147777A1 (en) * | 2011-04-26 | 2012-11-01 | 帝人株式会社 | High-insulating film |
US9617407B2 (en) | 2011-04-26 | 2017-04-11 | Teijin Limited | Highly insulating film |
JP2012246372A (en) * | 2011-05-26 | 2012-12-13 | Teijin Ltd | High-insulating film |
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