JPH06297563A - Syndiotactic polystyrene film roll - Google Patents

Syndiotactic polystyrene film roll

Info

Publication number
JPH06297563A
JPH06297563A JP8467593A JP8467593A JPH06297563A JP H06297563 A JPH06297563 A JP H06297563A JP 8467593 A JP8467593 A JP 8467593A JP 8467593 A JP8467593 A JP 8467593A JP H06297563 A JPH06297563 A JP H06297563A
Authority
JP
Japan
Prior art keywords
film
roll
winding
film roll
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
Application number
JP8467593A
Other languages
Japanese (ja)
Inventor
Tadashi Okudaira
正 奥平
Naonobu Oda
尚伸 小田
Tomonori Yoshinaga
知則 吉永
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyobo Co Ltd
Original Assignee
Toyobo Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyobo Co Ltd filed Critical Toyobo Co Ltd
Priority to JP8467593A priority Critical patent/JPH06297563A/en
Publication of JPH06297563A publication Critical patent/JPH06297563A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2515/00Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/12Density

Abstract

PURPOSE:To provide a syndiotactic polystyrene film roll without the generation of creases with time and also the generation of marks at the time of releasing. CONSTITUTION:A film roll is formed by winding up a styrene film of thickness of 25mum or less and of syndiotactic structure substantially in the range of three- dimensional surface roughness (SRa) of 0.01-0.10mum on the film surface, and the winding hardness (H) as an outstanding feature of the syndiotactic polystyrene film roll is as high as satisfying 80<=H<=95.

Description

【発明の詳細な説明】Detailed Description of the Invention

【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2軸延伸フイルムを巻き上げて形成したフ
イルムロールに関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film roll formed by winding a syndiotactic polystyrene biaxially stretched film.

【0002】[0002]

【従来の技術】一般にプラスチックフイルムを巻き取る
際には、巻上げられた製品ロールにおけるフイルムとフ
イルムとの間に介在する空気の量を終始ほぼ一定の状態
に保持することが良好な巻姿の製品ロールを得るとさ
れ、この為に押圧ロールを用い所定の接圧を付与し、製
品ロール中に巻込まれる空気量を制御してフイルムを巻
取る方法が最も一般的である。即ちフイルム巻層間の空
気量が多すぎると該フイルム巻層間の摩擦係数が著しく
減少し、フイルムを巻取りドラムに巻上げる際に該フイ
ルムが巾方向に蛇行してフイルムロールの両端側面が不
揃いになるいわゆる「端面ズレ」と称される欠点を生じ
たり、フイルム輸送中の振動により同様の現象が発生し
実用に耐えない。
2. Description of the Related Art Generally, when winding a plastic film, it is preferable to keep the amount of air present between the film and the film in the wound product roll in a substantially constant state from beginning to end. The most common method is to obtain a roll, and for this purpose, a pressing roll is used to apply a predetermined contact pressure to control the amount of air taken into the product roll to wind the film. That is, when the amount of air between the film winding layers is too large, the coefficient of friction between the film winding layers is remarkably reduced, and when the film is wound on the winding drum, the film meanders in the width direction and the side surfaces on both ends of the film roll become uneven. However, a so-called "edge shift" may occur, or a similar phenomenon may occur due to vibration during transportation of the film, which is not practical.

【0003】他方、フイルム巻層間の空気量が少なすぎ
る場合には、フイルム巾方向の厚み斑により、厚い部分
が巻取りドラムの上で重なり合うために他の部分に比べ
こぶ状に突出するという問題がある。以上のことから、
フイルムの表面特性や力学特性に合った適度な量の空気
層をフイルム巻上げ時にフイルム巻層間に介在させ得る
巻き方が採用されている。然しながら、シンジオタクチ
ックポリスチレン系2軸延伸フイルムは、素材自身が新
規な事、更に本質的に脆いためフイルム製造時および加
工時にフイルム同志又はロール等との摩擦によりフイル
ム表面に擦り傷や白粉が発生しやすいという欠点をもつ
ため、完全に巻上げられたフイルムロールはなかった。
On the other hand, when the amount of air between the film winding layers is too small, the thickness unevenness in the film width direction causes the thick portions to overlap each other on the take-up drum and thus to protrude more like a bump than the other portions. There is. From the above,
A winding method is adopted in which an appropriate amount of air layer suitable for the surface characteristics and mechanical characteristics of the film can be interposed between the film winding layers when winding the film. However, since the syndiotactic polystyrene biaxially stretched film is a new material itself and is inherently brittle, scratches and white powder are generated on the film surface due to friction with the film or rolls during film production and processing. None of the film rolls were completely wound up due to the drawback of being easy.

【0004】[0004]

【発明が解決しようとする課題】フイルムロールの巻き
条件を決定する際には、前述のフイルム製造時に欠点の
ないことは勿論、フイルムロール保存中の経時的に発生
する「しわ」防止をはかっておかねばならない。即ちフ
イルムロールを放置しておくと、フイルムロールの表面
部分や端面部分から空気中に含まれる水分がフイルムに
徐々に吸収され、この吸湿に伴って僅かにフイルムが伸
長する結果、フイルムロールに「しわ」が発生する。こ
のような経時的な「しわ」は、本発明が対象とする薄い
フイルムに生じやすい問題である。即ち本発明はフイル
ム厚さが25μm以下であり、かつ該フイルムの表面に
おける中心線平均粗さ(Ra)が0.01〜0.10μ
mの範囲にある実質的にシンジオタクチック構造を有す
るスチレン系フイルムを巻上げて形成したフイルムロー
ルであって、該フイルムの巻き硬さが80以上、95以
下であることを特徴とするポリスカチレン系フイルムロ
ール。
When determining the winding condition of the film roll, it is necessary to prevent the above-mentioned "wrinkle" which occurs during the storage of the film roll, not to mention that there is no defect in the film production. I have to do it. That is, when the film roll is left as it is, moisture contained in the air is gradually absorbed by the film from the surface portion and the end surface portion of the film roll, and the film is slightly stretched as a result of this moisture absorption. Wrinkles occur. Such "wrinkles" over time is a problem that is likely to occur in the thin film targeted by the present invention. That is, the present invention has a film thickness of 25 μm or less and a center line average roughness (Ra) on the surface of the film of 0.01 to 0.10 μm.
A film roll formed by winding up a styrene-based film having a substantially syndiotactic structure in the range of m, wherein the winding hardness of the film is 80 or more and 95 or less. roll.

【0005】[0005]

【課題を解決するための手段】フイルム巻層間に介在し
うる適度な空気層は、フイルム素材そのものの性質(例
えば保存時の吸湿に伴う膨張係数は、本発明のフイルム
ではナイロンフイルムの1/100、ポリエステルフイ
ルムの1/10と大きく異なる)および表面特性(例え
ばポリエステルフイルムの表面粗度との対応…特開昭5
7−193322号公報)により規定されるものである
が、この空気層を正確に測定する手段はない。そこで、
従来法である巻上げフイルムロールの硬度をもって空気
層と対比させる。即ちフイルムの厚みを一定とすれば、
空気層が厚い場合には硬度が低くなり、空気層が薄けれ
ば硬度は高くなる。
A suitable air layer that can be interposed between the film winding layers is a property of the film material itself (for example, the expansion coefficient due to moisture absorption during storage is 1/100 of that of the nylon film in the film of the present invention). Of the polyester film and the surface characteristics (for example, the surface roughness of the polyester film).
However, there is no means for accurately measuring this air layer. Therefore,
The hardness of the conventional winding film roll is compared with that of the air layer. That is, if the film thickness is constant,
When the air layer is thick, the hardness is low, and when the air layer is thin, the hardness is high.

【0006】本発明は、フイルム厚さが25μ以下の薄
膜で、かつフイルムの表面における三次元表面粗さ(S
Ra)が0.01〜0.10の範囲にある実質的にシン
ジオタクチック構造を有するポリスチレン系フイルムロ
ールの場合、該フイルムロールの巻き硬さが80以上9
5以下のとき、前述したフイルム製造時および保存中の
欠点も回避出来ることを見い出した。
The present invention is a thin film having a film thickness of 25 μm or less, and has a three-dimensional surface roughness (S) on the surface of the film.
In the case of a polystyrene film roll having a substantially syndiotactic structure with Ra) in the range of 0.01 to 0.10, the winding hardness of the film roll is 80 or more and 9 or more.
It has been found that when the ratio is 5 or less, the above-mentioned defects during film production and storage can be avoided.

【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該磁気共鳴法によ
り定量されるタクテイシティがダイアッド(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。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。
In the polystyrene polymer having stereoregularity of syndiotactic structure used in the present invention, the tacticity of the side chain phenyl group or substituted phenyl group quantified by the magnetic resonance method is diad (the structural unit is It is desirable that the syndiotactic structure is 85% or more in two) and 50% or more in pentad (five constitutional units). 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 ( poly (alkylstyrene) such as p-tertiarybutylstyrene), poly (p-, m- or o-chlorostyrene), poly (p-, m- or o-bromostyrene), poly (p-, m-). Or o-fluorostyrene), poly (o-methyl-p-fluorostyrene) and other poly (halogenated styrene), poly (p-, m- or o-chloromethylstyrene) and other poly (halogen-substituted alkylstyrene) , Poly (p-, m- or o-methoxystyrene), poly (p-, m- or o-ethoxystyrene), and other poly (alkoxystyrenes), poly (p
-, M- or o-carboxymethyl styrene) such as poly (carboxyalkyl styrene) poly (p-vinylbenzyl propyl) such as poly (alkyl ether styrene), poly (p-trimethylsilyl styrene) such as poly (alkyl silyl styrene) ), And also poly (vinylbenzyldimethoxyphosphide) and the like.

【0008】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5
0,000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
フイ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、150
0,0000以上では延伸張力の増大に伴う破断等が発
生することがあり、余り好ましくない。
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 does not necessarily have to be 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, a copolymer or 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 5
It is 50,000 or more. Weight average molecular weight is 10,000
If it is less than the above range, a biaxially stretched film having excellent strength and elongation characteristics and heat resistance cannot be obtained. The upper limit of the weight average molecular weight is not particularly limited, but it is 150
If it is more than 10,000, breakage or the like may occur due to an increase in stretching tension, which is not very preferable.

【0009】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イルムは、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。表面形成用の滑剤としては、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、リン酸カリシウム、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
1.0μm以下、特に0.05μm以上0.8μm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0.8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6
0%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。
Further, the syndiotactic polystyrene type biaxially stretched film of the present invention can be produced by a known method, for example, a sequential stretching method in which longitudinal stretching and transverse stretching are carried out in order, and
A longitudinal / longitudinal stretching method, a longitudinal / lateral / longitudinal stretching method, a longitudinal / longitudinal / horizontal stretching method or the like can be adopted, and is selected according to various properties such as required strength and dimensional stability. . In addition, you may perform a heat setting process, a longitudinal relaxation process, a lateral relaxation process etc. as needed. As a lubricant for surface formation, silica,
Metal oxides such as titanium dioxide, talc, kaolinite,
Examples are particles that are inert to syndiotactic polystyrene-based polymers, such as salts of metals such as calcium carbonate, calcium phosphate, and barium sulfate, or 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 1.0 μm or less, and particularly 0.1. It is preferably from 05 μm to 0.8 μm, 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 0.005% by weight with respect to 100% by weight of syndiotactic polystyrene-based polymer. % Or more and 2.0% by weight or less, and particularly preferably 0.1% by weight or more and 0.8% by weight or less. Further, the shape of the lubricant particles has an area shape factor of 6
It is preferable that one or more of 0% or more is contained. This area shape factor is calculated by the following equation.

【0010】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、耐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を発生が起こ
り易くなり、生産安定性が不良となる。
Area shape factor = (projected cross-sectional area of particle / area of circle circumscribing the particle) × 100 (%) The polystyrene-based polymer used in the present invention may have a known antioxidant, antistatic property, etc. It is possible to use a mixture containing an appropriate amount of an inhibitor and the like. 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 easily occurs during stretching, resulting in poor production stability.

【0011】フイルムの表面粗度は、フイルム原料に投
入する添加剤と製膜条件により変わり、これらを変更し
てユーザーの要求に合致した表面設計をするのである
が、一般的な特性としては前述のSRaで代表されるS
Raの測定は、触針式3次元表面粗さ計(SE3AK、
(株)小坂研究所製)を用いて、針の半径2μm、荷重
30mgの条件下に、フイ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、2μ
m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(SPA−11)に取り込み、SRaを求め
た。
The surface roughness of the film varies depending on the additives added to the film raw material and the film forming conditions, and these are changed to design the surface to meet the user's requirements. S represented by SRa
Ra is measured by a stylus type three-dimensional surface roughness meter (SE3AK,
(Kosaka Laboratories Co., Ltd.) under the conditions of a needle radius of 2 μm and a load of 30 mg, and a cut-off value of 0.25 mm was measured in the longitudinal direction of the film over a measurement length of 1 mm.
It was divided into 500 points at m pitches, and the height of each point was taken into a three-dimensional roughness analyzer (SPA-11) to determine SRa.

【0012】本発明の適用出来るシンジオタクチックポ
リスチレン系フイルムは表面粗さ(SRa)が0.10
以下でなければならない。SRaが0.1を越えるもの
では、フイルムロールの巻き硬度を高くしても「経時し
わ」を防止することは困難である。またSRaが0.0
1未満のものでは、硬く巻上げてフイルムロールを製造
することは可能であり、かつ「経時しわ」を防止できる
ものの、フイルムとしての滑り性に欠け、簡単にフイル
ム表面に擦り傷や白粉等が発生し、実用的なものとは云
い難い。
The syndiotactic polystyrene film to which the present invention can be applied has a surface roughness (SRa) of 0.10.
Must be: If SRa exceeds 0.1, it is difficult to prevent "wrinkles over time" even if the winding hardness of the film roll is increased. SRa is 0.0
If it is less than 1, it is possible to roll it up hard to produce a film roll and prevent "wrinkles over time", but it lacks the slipperiness of the film and easily causes scratches or white powder on the film surface. It is hard to say that it is practical.

【0013】本発明のフイルムは、厚さ25μ以下のも
のに限定される。厚いフイルムでは、経時的なしわは実
際上問題とならない。フイルムロールの硬度の測定は、
高分子計器(株)製のハードネステスタータイプC′を
用いて行った。測定はロールの軸方向に沿って10点測
定して、その平均値を用いる。
The film of the present invention is limited to those having a thickness of 25 μm or less. With thick films, wrinkles over time are practically insignificant. To measure the hardness of the film roll,
Hardness tester type C'made by Kobunshi Keiki Co., Ltd. was used. For the measurement, 10 points are measured along the axial direction of the roll, and the average value is used.

【0014】シンジオタクチックポリスチレンに不活性
無機物であるシリカを添加し、種々の条件で2軸延伸フ
イルムを作成した。これらのフイルムにサーフェスセン
ターワインド方式の捲取機を使用し、タッチロールの押
圧力とフイルムの捲取張力とを適宜変更して硬度の異な
るロールを作成した。かくして得たフイルムロールを3
0℃、相対湿度70%の雰囲気中に1週間放置すること
によりフイルム捲上げ硬度(H)と「経時しわ」発生の
対応をみた。
Biaxially stretched film was prepared under various conditions by adding silica, which is an inert inorganic material, to syndiotactic polystyrene. A surface center wind type winder was used for these films, and the pressing force of the touch roll and the winding tension of the film were appropriately changed to prepare rolls having different hardnesses. 3 film rolls thus obtained
The film winding hardness (H) and the occurrence of "wrinkles over time" were checked by leaving the film in an atmosphere of 0 ° C and 70% relative humidity for 1 week.

【0015】[0015]

【表1】 [Table 1]

【0016】表1の結果によれば、フイルム捲き硬さが
80以上で経時しわの発生は認められなくなる。吸湿性
の高いナイロンやポリエステルフイルムの場合は通常9
0以上の捲き硬さを必要とするが、前述の如く吸湿時の
寸法変化の少ない本素材では、捲取り条件が拡大した。
捲き硬さ95より硬く捲くと部分的にフイルムがブロッ
キング(粘着)現象を示し、そのひきはがして使用する
過程でフイルムの擦れによる細かい傷(スクラッチ傷)
が発生することが認められた。本発明によって得られる
シンジオタクチック系ポリスチレンのフイルムロール
は、経時的しわが生じないことから、その耐熱性、電気
特性、透明性、耐湿性などに優れることから、磁気記録
媒体用、写真・製版用コンデンサー用、包装用等の素材
に使用できる。
According to the results shown in Table 1, when the film winding hardness is 80 or more, the occurrence of wrinkles is not recognized. Normally 9 for highly hygroscopic nylon or polyester film
Although a winding hardness of 0 or more is required, as described above, the winding condition has been expanded in this material, which has a small dimensional change when absorbing moisture.
When the film is rolled harder than 95, the film partially shows a blocking (adhesion) phenomenon, and in the process of peeling off and using it, fine scratches (scratch scratches) due to rubbing of the film
Was confirmed to occur. The syndiotactic polystyrene film roll obtained by the present invention is excellent in heat resistance, electrical characteristics, transparency, moisture resistance, etc. because it does not wrinkle over time, and therefore it is used for magnetic recording media, photo and plate making. It can be used as a material for capacitors and packaging.

【0017】実施例1 滑剤として、平均粒径1.0μm、ばらつき度15%、
面積形状係数95%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2.5重量%添加したポリマーチップと、滑
剤の添加し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
赤外加熱ヒーターを複数個使用して130℃で縦方向に
3.5倍延伸し、次にテンターで、横方向に120℃で
3.0倍延伸し、260℃で熱固定した。得られたフイ
ルムの厚みは6μ、SRa=0.058μmであった。
このフイルムをスリッターにより巾600mm、全長1
0,000mのフイルムロールに捲取速度100m/分
で捲き上げた。この時の捲取張力は0.8kg/mm2
タッチロールの押圧力60kgの条件で、硬度Hが88の
フイルムロールを得た。このフイルムロールを30℃、
70%RHの恒温恒湿室で1週間放置したが、このフイ
ルムロールには「経時しわ」の発生は認められなかっ
た。
Example 1 As a lubricant, an average particle size of 1.0 μm, a degree of variation of 15%,
A silica chip having an area shape factor of 95% was added in an amount of 2.5% by weight based on 100% by weight of syndiotactic polystyrene (weight average molecular weight of 300,000) and a polymer chip to which a lubricant was not added was used in a weight ratio of 1 to 2. After mixing in a ratio of 9, the mixture was dried, melt-extruded at 295 ° C., cooled and solidified to obtain an amorphous sheet. The amorphous sheet was first stretched 3.5 times in the longitudinal direction at 130 ° C. using a plurality of infrared heaters, then stretched 3.0 times in the transverse direction at 120 ° C. with a tenter, and then stretched at 260 ° C. Heat fixed. The obtained film had a thickness of 6 μm and SRa = 0.058 μm.
This film is slittered to a width of 600 mm and a total length of 1
It was wound up on a film roll of 10,000 m at a winding speed of 100 m / min. The winding tension at this time is 0.8 kg / mm 2 ,
A film roll having a hardness H of 88 was obtained under the condition that the pressing force of the touch roll was 60 kg. This film roll is 30 ℃,
The film roll was allowed to stand for 1 week in a constant temperature and humidity room at 70% RH, but no "wrinkle with time" was observed in this film roll.

【0018】比較例1、2 実施例1と同様の方法により得られたフイルムをスリッ
ターにて条件を変更して硬度の異なるフイルムロールを
得た。これらのフイルムロールを30℃、70%RHの
恒温恒湿室で1週間放置すると、比較例1の硬度78の
ロールには、その表層より中心に向けて、経時しわが認
められた。一方、硬度96の比較例2のロールには、経
時しわが認められなかったものの、ロールより引き取っ
たシートサンプルを顕微鏡下に観察すると、細かいスジ
状のスクラッチ傷が多発しているのが確認された。
Comparative Examples 1 and 2 The film obtained by the same method as in Example 1 was changed in condition with a slitter to obtain film rolls having different hardnesses. When these film rolls were allowed to stand for 1 week in a constant temperature and humidity chamber at 30 ° C. and 70% RH, wrinkles were observed on the roll having the hardness of 78 of Comparative Example 1 from the surface layer toward the center. On the other hand, although wrinkles were not observed over time on the roll of Comparative Example 2 having a hardness of 96, when a sheet sample taken from the roll was observed under a microscope, it was confirmed that many fine scratch-like scratches occurred. It was

【0019】[0019]

【表2】 [Table 2]

【0020】[0020]

【発明の効果】本願発明のフイルムロールは、経時しわ
の発生がなく、また引きはがし時のスクラッチ傷がない
フイルムロールであり、磁気記録媒体用、写真用、製版
用、コンデンサー用、包装用に適していることがわか
る。
Industrial Applicability The film roll of the present invention is a film roll which does not cause wrinkles over time and has no scratches when peeled off, and is suitable for magnetic recording media, photography, plate making, capacitors, and packaging. It turns out to be suitable.

───────────────────────────────────────────────────── 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 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display location B29L 7:00 4F

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 フイルム厚さが25μm以下であり、か
つ該フイルムの表面における三次元表面粗さ(SRa)
が0.01〜0.10μmの範囲にある実質的にシンジ
オタクチック構造を有するスチレン系フイルムを巻上げ
て形成したフイルムロールであって、該フイルムロール
の巻き硬さ(H)が80≦H≦95の範囲であることを
特徴とするシンジオタクチックポリスチレン系フイルム
ロール。
1. A film having a thickness of 25 μm or less, and a three-dimensional surface roughness (SRa) on the surface of the film.
Is a film roll formed by winding up a styrene-based film having a substantially syndiotactic structure in the range of 0.01 to 0.10 μm, and the winding hardness (H) of the film roll is 80 ≦ H ≦. A syndiotactic polystyrene-based film roll characterized by being in the range of 95.
JP8467593A 1993-04-12 1993-04-12 Syndiotactic polystyrene film roll Pending JPH06297563A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8467593A JPH06297563A (en) 1993-04-12 1993-04-12 Syndiotactic polystyrene film roll

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8467593A JPH06297563A (en) 1993-04-12 1993-04-12 Syndiotactic polystyrene film roll

Publications (1)

Publication Number Publication Date
JPH06297563A true JPH06297563A (en) 1994-10-25

Family

ID=13837285

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8467593A Pending JPH06297563A (en) 1993-04-12 1993-04-12 Syndiotactic polystyrene film roll

Country Status (1)

Country Link
JP (1) JPH06297563A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996017889A1 (en) * 1994-12-07 1996-06-13 Idemitsu Petrochemical Co., Ltd. Polystyrene resin composition and oriented polystyrene film
JP2007100162A (en) * 2005-10-04 2007-04-19 Tdk Corp Thin film deposition method, method for producing magnetic recording medium, and thin film deposition system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996017889A1 (en) * 1994-12-07 1996-06-13 Idemitsu Petrochemical Co., Ltd. Polystyrene resin composition and oriented polystyrene film
JP2007100162A (en) * 2005-10-04 2007-04-19 Tdk Corp Thin film deposition method, method for producing magnetic recording medium, and thin film deposition system

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