JPS6287321A - Manufacture of highly toughened polyester film - Google Patents
Manufacture of highly toughened polyester filmInfo
- Publication number
- JPS6287321A JPS6287321A JP22933585A JP22933585A JPS6287321A JP S6287321 A JPS6287321 A JP S6287321A JP 22933585 A JP22933585 A JP 22933585A JP 22933585 A JP22933585 A JP 22933585A JP S6287321 A JPS6287321 A JP S6287321A
- Authority
- JP
- Japan
- Prior art keywords
- film
- stretched
- stretching
- temperature
- center
- 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
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は９強力化ポリエステルフィルムの製造方法に関
するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for producing a 9-strengthened polyester film.
強力化ポリエステルフィルムの製造方法とじては、たと
えは特公昭第３５−５８８７号公報に示されているよう
に、いったん二軸延伸したフィルムを、さらに延伸する
方法が知られている。As a method for producing a reinforced polyester film, for example, as shown in Japanese Patent Publication No. 35-5887, a method is known in which a biaxially stretched film is further stretched.
しかし、最近では、さらに高強力化フィルムを得るため
に再延伸倍率を高くするととが望まれているが、従来の
方法では安定した延伸ができず。However, recently, it has been desired to increase the re-stretching ratio in order to obtain a film with even higher strength, but stable stretching cannot be achieved using conventional methods.
製品収率が著しく悪化するという欠点があった。There was a drawback that the product yield was significantly deteriorated.
本発明は、上記欠点を解消せしめ、高倍率の再延伸が安
定して行なえる強力化ポリエステルフィルムの製造方法
を提供せんとすることを目的とするものである。An object of the present invention is to eliminate the above-mentioned drawbacks and to provide a method for producing a strengthened polyester film in which re-stretching at a high magnification can be stably performed.
本発明は未延伸フィルムを、縦方向（フィルムの流れ方
向）に延伸後、横方向に延伸し９次いで。In the present invention, an unstretched film is stretched in the machine direction (film flow direction) and then stretched in the transverse direction.
少なくとも一方向に再延伸するフィルムの製造方法にお
いて、横延伸されるフィルム端部の温度を。In a method for producing a film in which the film is re-stretched in at least one direction, the temperature at the edge of the film that is laterally stretched.
フィルム中央部の温度より２℃以上低くして、クリップ
把持位置からフィルム中央へ向けて１０〜１５０匝の範
囲の部分の複屈折が０・０５〜０・２０で、かつ、その
範囲の平均厚さがフィルム中央の厚さの３〜１５倍とな
るように横方向に延伸することを特徴とする強力化ポリ
エステルフィルムの製造方法としたものである。The temperature is 2°C or more lower than the temperature at the center of the film, and the birefringence of the area from the clip gripping position to the center of the film is 0.05 to 0.20, and the average thickness in that range is 0.05 to 0.20. This is a method for producing a reinforced polyester film, which is characterized by stretching in the transverse direction so that the thickness is 3 to 15 times the thickness at the center of the film.
本発明に用いるポリエステルは、芳香族ジカルボン酸（
！、たはそのエステル）とジオキシ化合物を重縮合して
得られる熱可塑性ポリエステルであれば、とくに限定さ
れないが１本発明による延伸性向上効果がとくに顕著な
のは、ポリエチレンテレフタレート、ポリエチレン−α
、β−ビス（２−クロルフェノキシ）エタン−４，４′
−ジカルボキシレート、ポリエチレン−２，６−ナフタ
レートなどを主成分とするガラス転移点が７０“０以」
−の剛直ポリエステルであり、その中でも、特に本発明
の効果が大きいのは、ポリエチレン−α、β−ビス（２
−１０ルフエノキシ）エタン−４，４′−ジカルボキシ
レートを主成分とするポリエステルである。The polyester used in the present invention is an aromatic dicarboxylic acid (
! , or its ester) and a dioxy compound, but is not particularly limited. The stretchability improvement effect of the present invention is particularly remarkable for polyethylene terephthalate, polyethylene-α
, β-bis(2-chlorophenoxy)ethane-4,4'
-Glass transition point is 70"0 or higher" which is mainly composed of dicarboxylate, polyethylene-2,6-naphthalate, etc.
Among them, polyethylene α, β-bis(2
It is a polyester whose main component is ethane-4,4'-dicarboxylate.
また９本発明に用いるポリエステルに１本発明の目的を
阻害しない範囲で、他種ポリマをブレンドしてもよいし
、−！：た酸化防止剤、熱安定剤９表面突起形成剤、核
生成剤、紫外線吸収剤々どの無機または有機添加剤を通
常添加される量程度添加してもよい。In addition, other types of polymers may be blended with the polyester used in the present invention to the extent that they do not impede the purpose of the present invention. Inorganic or organic additives such as antioxidants, thermal stabilizers, surface protrusion forming agents, nucleating agents, ultraviolet absorbers, etc. may be added in the amounts normally added.
また９本発明に用いるポリエステルの溶融粘度は特に限
定されないが、溶融粘度が５００〜２００００ボイズ、
特に７００〜１００００ボイズの範囲である場合が、延
伸性、得られたフィルムのヤング率がより一層良好とな
るので、特に好ましい。Further, the melt viscosity of the polyester used in the present invention is not particularly limited, but the melt viscosity is 500 to 20,000 voids,
In particular, a range of 700 to 10,000 voids is particularly preferable because stretchability and Young's modulus of the obtained film are even better.
本発明に用いる二軸延伸フィルムを安定して製造するに
は９次の方法が有効である。The following nine methods are effective for stably producing the biaxially stretched film used in the present invention.
上記ノポリエステルのペレットを公知の溶融押出機を用
いてシート状に押出し、冷却固化して未延伸フィルムを
作る。The above-mentioned polyester pellets are extruded into a sheet using a known melt extruder, and are cooled and solidified to produce an unstretched film.
この未延伸フィルムを、長手方向に２５〜４．０倍、好
ましくは３０〜３．８倍延伸する。延伸倍率を」１記範
囲にすると、複屈折０．０５〜０．２０の部分全１０〜
１５０Ｉ１１ＩＩ＋有する二軸延伸フィルムが得られや
すくなる。また、延伸温度は、ポリマのガラス転移点を
Ｔｇとした場合、Ｔｇ−２０°（］−Ｔｇ＋３５℃の
範囲、延伸速度は１０〜１０％／分の範囲が好適である
。This unstretched film is stretched 25 to 4.0 times, preferably 30 to 3.8 times, in the longitudinal direction. When the stretching ratio is set to the range 1, the total area with birefringence of 0.05 to 0.20 is 10 to
A biaxially stretched film having 150I11II+ can be easily obtained. Further, the stretching temperature is preferably in the range of Tg-20° (]-Tg+35°C, where Tg is the glass transition point of the polymer, and the stretching speed is preferably in the range of 10 to 10%/min.
ここで、この−軸延伸フィルムの結晶化度を１５〜３０
％とすると、複屈折０．０５〜０．２０の部分を１０〜
１５０ｍｍ幅有する二軸延伸フィルムがより一層得られ
やすくなるので好適である。Here, the crystallinity of this -axis stretched film is 15 to 30.
%, the part with birefringence of 0.05 to 0.20 is 10 to
This is preferred because it makes it easier to obtain a biaxially stretched film having a width of 150 mm.
次に、との−軸延伸フィルムをステンタを用いて９幅方
向に２３〜４０、倍、好壕しくけ２５〜３８倍延伸する
。延伸倍率（ステンタの最大幅／ステンタの入口幅）を
上記の範囲にすると、複屈折０゜０５〜０２００部分を
１０〜１５０ｎ＋ｎ＋幅有し、かつ、該部分の平均厚さ
がフィルム中央の厚さの３〜１．５倍の厚さである二軸
延伸フィルムが得られやすくなる。また、この時の延伸
温度は、ポリマの冷結晶化温度′ｆｆ：’ｌ’αとした
場合、そのＴｃｃとＴｇ の差が４５℃未満のポリエ
ステルは、Ｔｃｃ−１５℃〜Ｔｃｃ ＋１５°Ｏ，Ｔｃ
ｃとＴｇの差が４５℃以上のポリエステルは、 Ｔｅｃ
−６０’Ｏ−’ｌ″ｃｃの範囲が好適である。Next, the -axially stretched film is stretched 23 to 40 times in the width direction using a stenter, and 25 to 38 times in the width direction. When the stretching ratio (maximum width of stenter/inlet width of stenter) is set to the above range, the birefringent 0°05 to 0200 part has a width of 10 to 150n+n+, and the average thickness of this part is the thickness of the center of the film. It becomes easier to obtain a biaxially stretched film having a thickness of 3 to 1.5 times. In addition, when the stretching temperature at this time is the cold crystallization temperature of the polymer 'ff:'l'α, for polyesters with a difference between Tcc and Tg of less than 45°C, Tcc -15°C to Tcc +15°O, Tc
Polyester with a difference between c and Tg of 45℃ or more is Tec
A range of -60'O-'l''cc is preferred.
またクリップの温度をＴｇ ＋ １００℃以下とし、ク
リップ把持位置から中央に向って１０ｍｍの範囲の５一
部分の温度をフィルム中央よシ２℃、好ましくは４℃．
さらに好ましくは１０℃以上低くすることが必要である
。また、延伸速度は１０〜１０％／に範囲が好適である
。In addition, the temperature of the clip is set to Tg + 100°C or less, and the temperature of 5 parts within a range of 10 mm from the clip gripping position to the center of the film is set to 2°C, preferably 4°C.
More preferably, it is necessary to lower the temperature by 10°C or more. Further, the stretching speed is preferably in the range of 10 to 10%/.
次に、この二軸延伸フィルムを１２０〜１８０℃の範囲
の温度で２幅方向に、原長に対し３〜３０係弛緩させつ
つ、０５〜１２０秒間熱処理すると複屈折０．０５〜０
．２０の部分を１０〜１５０Ｉｎｍ有し、かつ、該部分
の平均厚さがフィルム中央の３〜１５倍である二軸延伸
フィルムが、１土）一層得られやすくなる。Next, when this biaxially stretched film is heat-treated for 05 to 120 seconds at a temperature in the range of 120 to 180°C in two width directions while relaxing by 3 to 30 degrees with respect to the original length, the birefringence is 0.05 to 0.
．． A biaxially stretched film having 20 parts of 10 to 150 Inm and the average thickness of the parts being 3 to 15 times that of the center of the film is more easily obtained.
ここで、この二軸延伸フィルムは、エツジのクリップ把
持位置からフィルム中央へ向かって、複製である。該部
分の幅が上記の範囲よシ狭いと。Here, this biaxially stretched film is a duplicate from the edge clip gripping position to the center of the film. The width of the part is narrower than the above range.
これを再延伸する場合の延伸性が不良となるので好まし
くない。また、該部分の幅が上記範囲よシ広いと、得ら
れた強力化フィルムの幅が狭くなり。This is not preferable because the stretchability becomes poor when this is re-stretched. Further, if the width of the portion is wider than the above range, the width of the obtained reinforced film will be narrow.
生産収率が低くなるので好ましくない。This is not preferred because the production yield will be low.
また、」−記の複屈折の範囲の部分の厚さを連続して測
定して得られた平均厚さは、フィルム中火部の厚さの６
〜１５倍、好捷しくけ６５〜１２倍。In addition, the average thickness obtained by continuously measuring the thickness of the part in the birefringence range indicated by "-" is 6
~15 times, good luck 65-12 times.
さらに好ましくは４〜１０倍であることが必要である。More preferably, it needs to be 4 to 10 times as large.
この値が−１−記範囲より小さくても、′８：た。Even if this value is smaller than the range indicated by -1-, '8:'.
大きくても再延伸する場合の延伸性が不良とカるので好
ましくない。Even if it is large, it is not preferable because the stretchability will be poor when re-stretching.
また、この二軸延伸フィルムのエツジのクリップ把持位
置からフィルム中火へ向って５髄の部分の長手方向屈折
率比を１，０３〜１０Ｂ、密度指数全００１〜００４の
範囲にすると、これを再延伸する場合の延伸性がより一
層良好となるので望ましい。In addition, if the longitudinal refractive index ratio of the 5-marrow portion from the edge clip gripping position of this biaxially stretched film toward the medium heat of the film is set to be in the range of 1,03 to 10B, and the density index is in the range of 001 to 004, this This is desirable because the stretchability in the case of re-stretching becomes even better.
以上の説明をわかりやすくするために、クリップの把持
状態を模式的に示した図面で説明する。In order to make the above description easier to understand, the description will be made using drawings that schematically show the gripping state of the clip.
第１図はフィルムをクリップが把持している状態の平面
図であシ、１はクリップ、４はフィルムであり、■はフ
ィルム中央部、特にフィルムの幅方向の中央である。FIG. 1 is a plan view of a film held by a clip, where 1 is the clip, 4 is the film, and ■ is the center of the film, particularly the center in the width direction of the film.
第２図は第１図におけるＡ ７．／の断面図である。Figure 2 shows A7 in Figure 1. / is a sectional view of /.
■がクリップ把持位置であし、Ｗが複屈折が００５〜０
２００部分の幅であり、Ｗを１０〜１５０ｍｌ１１とす
ることが本発明では必須となる。また、ｌｏ はフィ
ルム中央部■の厚さであり、Ｗの幅の部分の平均厚さが
１０の３〜１５倍であることが本発明では必須となる
。■ is the clip gripping position, and W is the birefringence of 005 to 0.
In the present invention, it is essential to set W to 10 to 150 ml11. In addition, lo is the thickness of the central portion of the film, and it is essential in the present invention that the average thickness of the width of W is 3 to 15 times 10.
次に、との二軸延伸フィルムを長手方向９幅方向の少な
くとも一方向に再延伸する。この時の。Next, the biaxially stretched film is re-stretched in at least one of the longitudinal direction and the width direction. At this time.
長手方向の延伸倍率α１幅方向の延伸倍率βが下式を満
足するようにすれば、再延伸の延伸性がより一層良好と
なるので望ましい。It is desirable that the stretching ratio α1 in the longitudinal direction and the stretching ratio β in the width direction satisfy the following formula, since the stretchability in re-stretching becomes even better.
２２≦α十β≦８．０
なお、たとえば、長手方向にのみ再延伸する場合はβ−
１とする。22≦α+β≦8.0 For example, when re-stretching only in the longitudinal direction, β−
Set to 1.
また、この時の延伸温度は１２０〜２０［）’ｏ。Further, the stretching temperature at this time was 120 to 20[)'o.
延伸速度は１０〜１０係／分の範囲が好適である。The stretching speed is preferably in the range of 10 to 10 ratios/min.
次に必要に応じて、再延伸された二軸延伸フィルムを再
熱処理することもできる。この場合の熱処理条件は特に
限定されないが、温度１８０〜２６０℃．好ましくは２
００〜２４０°ｏで１時間０５〜１２０秒間、好ましく
はｉ、 ｏ〜６０秒間とすることが、得られたフィルム
のヤング率の点で好適である。Next, if necessary, the re-stretched biaxially stretched film can be reheat-treated. The heat treatment conditions in this case are not particularly limited, but include a temperature of 180 to 260°C. Preferably 2
From the viewpoint of the Young's modulus of the obtained film, the heating time is preferably 0.00 to 240° for 1 hour and 0.5 to 120 seconds, preferably i.o. to 60 seconds.
本発明は、上述したように、二軸延伸フィルムのエツジ
のクリップ把持位置近傍の物性を特定化したので、再延
伸の際にエツジからの破断がおとシにくくなり２次のよ
うなすぐれた効果が得られたものである。As mentioned above, the present invention specifies the physical properties of the edge of the biaxially stretched film in the vicinity of the clip gripping position, so that it is difficult to break from the edge during re-stretching, and excellent properties such as secondary It was effective.
本発明製造法によれば、二軸延伸フィルムを少なくとも
一方向に再延伸するに際し、再延伸倍率を高くしてもフ
ィルム破れがおこりに＜＜、高ヤング率フィルムを安定
して収率良く、製造することが可能となる。得られたフ
ィルムは磁気テープベースやコンデンサ用として有用で
ある。According to the production method of the present invention, when re-stretching a biaxially stretched film in at least one direction, film tearing does not occur even if the re-stretching ratio is increased. It becomes possible to manufacture. The obtained film is useful for magnetic tape bases and capacitors.
（１） 延伸性
再延伸製膜操作を４８時間連続して行ない、その間に生
じたフィルムの破れか０〜１回の範囲である場合は延伸
性良好、破れが２回以上生じた場合は延伸性不良と判定
した。(1) Stretchability If the re-stretching film forming operation is performed continuously for 48 hours, and the number of breaks in the film is in the range of 0 to 1, the stretchability is good, and if the film breaks 2 or more times, the stretching is good. It was determined that he had a sexual defect.
（２）屈折率 ナトリウムＤ線（波長５８９會）’を光源として。(2) Refractive index Sodium D line (wavelength: 589)' as a light source.
アツベ屈折計を用いて測定した。なお、マウント液には
ヨウ化メチレンまたはイオウ−ヨウ化メチレン溶液を用
い、２５℃・６５％ＲＨにて測定した。It was measured using an Atsube refractometer. Incidentally, methylene iodide or a sulfur-methylene iodide solution was used as the mounting solution, and the measurement was performed at 25° C. and 65% RH.
（３） 複屈折
上記の方法で、試料の長手方向と幅方向の屈折率を測定
し、（長手方向−幅方向）の差をもって上記（２）の方
法で試料の長手方向の屈折率（Ａとする）および溶融プ
レス後１０゛０の水中へ急冷して作った無配向（アモル
ファス）フィルムの長手方向の屈折率〔Ｂとする）を測
定し、Ａ／Ｂをもって、長手方向屈折率比とした。(3) Birefringence Measure the refractive index in the longitudinal direction and the width direction of the sample using the above method, and calculate the refractive index in the longitudinal direction of the sample (A ) and the refractive index in the longitudinal direction (denoted as B) of a non-oriented (amorphous) film made by melt-pressing and quenching in 10゛0 water, and A/B is the longitudinal refractive index ratio. did.
（５） 密度および密度指数
四塩化炭素とｎ−へブタンからなる密度勾配管を用いて
試料の密度（ρとする）および溶融プレス後１０′Ｃの
水中に急冷して作った無配向（アモルファス）フィルム
の密度（ρ。とする）を測定し。(5) Density and density index The density of the sample (rho) using a density gradient tube made of carbon tetrachloride and n-hebutane and the non-oriented ( Measure the density (rho) of the amorphous) film.
ρ−ρ。をもって密度指数とした。なお測定は２５℃に
て行なった。なお、結晶化度は密度から計算した。ρ−ρ. This was taken as the density index. Note that the measurements were performed at 25°C. Note that the crystallinity was calculated from the density.
（６）溶融粘度
高滓高化式フローテスターを用いて２９０℃゜ずり速度
２００ ｓｅｃ にて測定した。(6) Melt viscosity Measured using a high slag flow tester at 290° C. and a shear rate of 200 sec.
（７） フィルムのヤング率
Ａ Ｓ Ｔ Ｍ−Ｄ−８８２に規定された方法にしたが
って、インストロンタイプの引張試験機を用いて。(7) Young's Modulus of Film Using an Instron type tensile tester according to the method specified in ASTM-D-882.
２５℃・６５係ＲＨにて測定した。Measurement was performed at 25° C. and 65 RH.
（８） ガラス転移点 Ｔｇ冷結晶化温度 Ｔｃｃパ
ーキンエルマー社製のＤＳＣ（示差走査熱ｌ計）■型を
用いて測定した。ＤＳＣの測定条件は次のとおシである
。すなわち、試料ポリマ１０ｍｇをＤＳＣ装置にセット
しく融点＋５０ ’ｏ ）の温度で５分間溶融した後、
液体窒素中に急冷する。この急冷試料を１０’Ｏ／分で
昇温し、ガラス転移点Ｔ’ｇ を検知する。さらに昇
温を続け、ガラス状態からの結晶化の発熱ピーク温度を
もって冷結晶化温度 Ｔｅｃとする。(8) Glass transition point Tg cold crystallization temperature Tcc Measured using a PerkinElmer DSC (differential scanning calorimeter) type ■. The DSC measurement conditions are as follows. That is, after melting 10 mg of sample polymer in a DSC device for 5 minutes at a temperature of +50'o),
Quench in liquid nitrogen. This rapidly cooled sample is heated at a rate of 10'O/min, and the glass transition point T'g is detected. The temperature is further increased, and the exothermic peak temperature of crystallization from the glass state is defined as the cold crystallization temperature Tec.
以下に本発明の実施例を述べるが１本発明はこれらの実
施例によって限定されるものではない。Examples of the present invention will be described below, but the present invention is not limited to these Examples.
実施例１〜２．比較例１〜６
ホリエチレンα、β−ビス（２−クロルフェノキシ）エ
タン４，４′−ジカルボキシレートのベレット（溶融粘
度：２６００ポイズ）を、１８０℃で６時間減圧乾燥（
３Ｔｏｒｒ）させた。これを押出機（スクリュー径：４
０ｍｍφ）に供給し、３００’０でシート状に溶融押出
し、静電印加キャスト法にて表面温度２０℃のキャステ
ィング・ドラムに巻きつけて冷却固化し、フィルム中央
部の厚さ約１０５μｍの未延伸フィルムを作った。この
未延伸フィルムを延伸温度１１５℃で長手方向に６４倍
延伸した。この延伸は２組のロールの周速差によって行
なわれ、延伸速度は１００００％／分であった。Examples 1-2. Comparative Examples 1 to 6 A pellet of polyethylene α,β-bis(2-chlorophenoxy)ethane 4,4′-dicarboxylate (melt viscosity: 2600 poise) was dried under reduced pressure at 180°C for 6 hours (
3 Torr). This is extruded using an extruder (screw diameter: 4
0mmφ), melt-extruded into a sheet at 300'0, wrapped around a casting drum with a surface temperature of 20°C by electrostatic casting method, cooled and solidified, and unstretched with a thickness of about 105μm at the center of the film. made a film. This unstretched film was stretched 64 times in the longitudinal direction at a stretching temperature of 115°C. This stretching was performed by using a difference in peripheral speed between two sets of rolls, and the stretching speed was 10,000%/min.
との−軸延伸フィルムをステンタを用いて、延伸速度２
０００％／分で幅方向に６８倍延伸した。延伸温度は１
５０℃であった。ただし、クリップ温度は５０°Ｃ，ク
リップ把持部から中央へ向って１０ｍｍの領域の温度は
１１５“０となるようにステンタ内に熱風遮断板および
クリップ冷却水装置を設けた。さらに、との二軸延伸フ
ィルムを１幅方向に原長の５％だけ弛緩させつつ、１６
０℃で１０秒間熱処理した。Using a stenter, the -axially stretched film was stretched at a stretching speed of 2
The film was stretched 68 times in the width direction at 000%/min. The stretching temperature is 1
The temperature was 50°C. However, a hot air shield plate and a clip cooling water device were installed inside the stenter so that the clip temperature was 50°C and the temperature in the area 10mm from the clip gripping part toward the center was 115"0. While relaxing the axially stretched film by 5% of its original length in one width direction,
Heat treatment was performed at 0° C. for 10 seconds.
こうして得られた二軸延伸フィルムは、エツジのクリッ
プ把持位置からフィルム中央へ向って。The biaxially stretched film thus obtained is stretched from the edge clip gripping position toward the center of the film.
複屈折が００５〜０２０の範囲の部分の幅が３５＝であ
シ、また。との部分の厚さの平均値は６５μｍであシ、
フィルム中央部の７６倍であった（第１表・実施例１）
。The width of the part where the birefringence is in the range of 005 to 020 is 35=red. The average thickness of the part with is 65 μm,
It was 76 times that of the center of the film (Table 1, Example 1)
.
また、フィルムの製造条件を変更して種々の二軸延伸フ
ィルムを作った（第１表・実施例２．比較例１〜３）、
。In addition, various biaxially stretched films were made by changing the film manufacturing conditions (Table 1, Example 2, Comparative Examples 1 to 3).
.
これらのフィルムを、延伸温度１９０℃で長手方向に１
．８倍延伸した。この延伸は２組のロールの周速差によ
って行なわれ、延伸速度は５００００％／分であった。These films were stretched 1 time in the longitudinal direction at a stretching temperature of 190°C.
．． It was stretched 8 times. This stretching was performed by using a difference in peripheral speed between two sets of rolls, and the stretching speed was 50,000%/min.
この時の延伸性は、第１表に示したとおり、製造方法が
本発明範囲の場合（実施例１〜２）は。The stretchability at this time is as shown in Table 1, when the manufacturing method is within the scope of the present invention (Examples 1 and 2).
良好であシ、高ヤング率の強力化フィルムを安定して製
造できた。しかし、製造方法が本発明外である場合には
、延伸性が不良であシ、安定した製造ができなかった（
比較例１〜３）。A reinforced film with good strength and high Young's modulus could be stably produced. However, when the manufacturing method was outside the scope of the present invention, the stretchability was poor and stable manufacturing was not possible (
Comparative Examples 1-3).
実施例３〜４．比較例４〜６
ポリエチレンテレフタレートのペレットＣ溶融粘度：１
７０Ｄボイズ）を、１８０℃で６時間減圧乾燥（３Ｔｏ
ｒｒ ）ｉ）！させた。これを押出機（スクリュー径：
４０ｍｍφ）にイＪＵ給し、６００℃でシート状に溶融
押出し、静電印加キャスト法にて表面温度２０°Ｃのキ
ャスティングＯドラムに巻きつけて冷却固化し、フィル
ム中火部の厚さ約１０５μｍの未延伸フィルムを作った
。Examples 3-4. Comparative Examples 4-6 Polyethylene terephthalate pellet C melt viscosity: 1
70D Boyz) was dried under reduced pressure (3To
rr)i)! I let it happen. This is extruded using an extruder (screw diameter:
40mmφ), melted and extruded into a sheet at 600℃, wrapped around a casting drum with a surface temperature of 20℃ using the electrostatic casting method, cooled and solidified, and the thickness of the medium-heated part of the film was about 105μm. An unstretched film was made.
この未延伸フィルムを延伸温度８０℃で長手方向に３４
倍延伸した。この延伸は２組のロールの周速差によって
行なわれ、延伸速度は１００００％／分であった。この
−軸延伸フィルムをステンタを用いて、延伸速度２００
０％／分で幅方向に３．８倍延伸した。延伸温度は９０
℃であった。ただし。This unstretched film was stretched for 34 hours in the longitudinal direction at a stretching temperature of 80°C.
Stretched twice. This stretching was performed by using a difference in peripheral speed between two sets of rolls, and the stretching speed was 10,000%/min. This -axially stretched film was stretched at a stretching speed of 200 using a stenter.
It was stretched 3.8 times in the width direction at 0%/min. The stretching temperature is 90
It was ℃. however.
クリップ温度は５０℃．クリップ把持位置からステンタ
中央へ向って１０ｍｍの領域の温度は８０°Ｏとなるよ
うにステンタ内に熱風遮断板およびクリップ冷却水装置
を設けた。さらに、との二軸延伸フィルムを９幅方向に
原長の５％だけ弛緩させつつ、１２０℃で１０秒間熱処
理した。Clip temperature is 50℃. A hot air shielding plate and a clip cooling water device were provided in the stenter so that the temperature in an area 10 mm from the clip gripping position toward the center of the stenter was 80°O. Further, the biaxially stretched film was heat-treated at 120° C. for 10 seconds while being relaxed in the width direction by 5% of the original length.
こうして得られた二軸延伸フィルムは、エツジのクリッ
プ把持位置からフィルム中央へ向って。The biaxially stretched film thus obtained is stretched from the edge clip gripping position toward the center of the film.
複屈折が０・０５〜０２０の範囲の部分の幅が２０髄で
あり、また、との部分の厚さの平均値は５０μｍであり
、フィルム中央部の５９倍であった（第２表・実施例３
）、。The width of the part where the birefringence ranged from 0.05 to 0.020 was 20 mm, and the average thickness of the part was 50 μm, which was 59 times that of the center of the film (Table 2). Example 3
),.
また、フィルムの製造条件を変更して種々の二軸延伸フ
ィルムを作った（第２表・実施例４．比較例４〜６）。In addition, various biaxially stretched films were made by changing the film manufacturing conditions (Table 2, Example 4, Comparative Examples 4 to 6).
これらのフィルムを、同時二軸テンターを用いて、延伸
温度１５０ ’ｏで、長手方向９幅方向同時に１．５倍
ずつ延伸した。These films were simultaneously stretched by 1.5 times in each of the longitudinal and 9 width directions at a stretching temperature of 150'o using a simultaneous biaxial tenter.
この時の延伸性は、第２表に示したとおシ、製造方法が
本発明範囲の場合（実施例６〜４）は。The stretchability at this time was as shown in Table 2, and when the manufacturing method was within the scope of the present invention (Examples 6 to 4).
良好であり、高ヤング率の強力化フィルムを安定して製
造できた。しかし、製造方法が本発明外である場合には
、延伸性が不良であシ、安定した製造ができなかった（
比較例４〜６）。The results were good, and a reinforced film with a high Young's modulus could be stably produced. However, when the manufacturing method was outside the scope of the present invention, the stretchability was poor and stable manufacturing was not possible (
Comparative Examples 4-6).
第１図はフィルムをクリップが把持している状態の平面
図、第２図は第１図におけるＡ Ａ／の断面図である
１図における番号、記号は次の通りである。
１：クリップ、２：クリップ支柱、６：クリップ」二部
押え板、４：フイルム、■：フイルム中央部、■＝クリ
ップ把持位置、Ｗ：複屈折が０．０５〜０２００部分の
幅、１０：フィルム中央部の厚さである。FIG. 1 is a plan view of the film being held by the clip, and FIG. 2 is a sectional view of A A/ in FIG. 1. The numbers and symbols in FIG. 1 are as follows. 1: Clip, 2: Clip support, 6: Clip' two-part presser plate, 4: Film, ■: Center part of film, ■ = Clip gripping position, W: Width of part with birefringence of 0.05 to 0200, 10: This is the thickness at the center of the film.
Claims (1)
次いで、少なくとも一方向に再延伸するフィルムの製造
方法において、横延伸されるフィルム端部の温度を、フ
ィルム中央部の温度より２℃以上低くして、クリップ把
持位置からフィルム中央へ向けて１０〜１５０ｍｍの範
囲の部分の複屈折が０．０５〜０．２０で、かつ、その
範囲の平均厚さがフィルム中央の厚さの３〜１５倍とな
るように横方向に延伸することを特徴とする強力化ポリ
エステルフィルムの製造方法。After stretching the unstretched film in the longitudinal direction, stretching it in the transverse direction,
Next, in the method for producing a film in which the film is re-stretched in at least one direction, the temperature of the end portion of the film to be laterally stretched is lowered by 2° C. or more than the temperature of the center portion of the film, and the temperature is lowered by 10° C. or more from the clip gripping position toward the center of the film. It is characterized by stretching in the transverse direction so that the birefringence of the 150 mm area is 0.05 to 0.20, and the average thickness of the area is 3 to 15 times the thickness at the center of the film. A method for producing a reinforced polyester film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22933585A JP2569471B2 (en) | 1985-10-15 | 1985-10-15 | Method for producing toughened polyester film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22933585A JP2569471B2 (en) | 1985-10-15 | 1985-10-15 | Method for producing toughened polyester film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6287321A true JPS6287321A (en) | 1987-04-21 |
| JP2569471B2 JP2569471B2 (en) | 1997-01-08 |
Family
ID=16890541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22933585A Expired - Lifetime JP2569471B2 (en) | 1985-10-15 | 1985-10-15 | Method for producing toughened polyester film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2569471B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996006722A1 (en) * | 1994-08-30 | 1996-03-07 | Toray Industries, Inc. | Biaxially oriented polyester film and process for production thereof |
| WO2012153612A1 (en) * | 2011-05-06 | 2012-11-15 | コニカミノルタアドバンストレイヤー株式会社 | Stretched cellulose ester film and method for producing same |
| CN113580456A (en) * | 2021-08-11 | 2021-11-02 | 浙江格尔泰斯环保特材科技股份有限公司 | Preparation method of polytetrafluoroethylene microporous film |
-
1985
- 1985-10-15 JP JP22933585A patent/JP2569471B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996006722A1 (en) * | 1994-08-30 | 1996-03-07 | Toray Industries, Inc. | Biaxially oriented polyester film and process for production thereof |
| CN1069260C (en) * | 1994-08-30 | 2001-08-08 | 东丽株式会社 | Biaxially oriented polyester film and process for production thereof |
| WO2012153612A1 (en) * | 2011-05-06 | 2012-11-15 | コニカミノルタアドバンストレイヤー株式会社 | Stretched cellulose ester film and method for producing same |
| TWI499496B (en) * | 2011-05-06 | 2015-09-11 | Konica Minolta Opto Inc | A stretched cellulose ester film, and a method for producing the same |
| JP5861700B2 (en) * | 2011-05-06 | 2016-02-16 | コニカミノルタ株式会社 | Stretched cellulose ester film and method for producing the same |
| CN113580456A (en) * | 2021-08-11 | 2021-11-02 | 浙江格尔泰斯环保特材科技股份有限公司 | Preparation method of polytetrafluoroethylene microporous film |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2569471B2 (en) | 1997-01-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0743445B2 (en) | Polyethylene naphthalate uniaxial highly oriented film for polarizing plate | |
| JPH0550376B2 (en) | ||
| US6685865B2 (en) | Process for producing a biaxially oriented polyester film and biaxially oriented polyester film | |
| JPS6287321A (en) | Manufacture of highly toughened polyester film | |
| JPS5936851B2 (en) | Manufacturing method of polyester film | |
| KR0140299B1 (en) | Process for preparing biaxially oriented polyester film | |
| JPH09295344A (en) | Manufacture of thermoplastic resin film | |
| JPH04101827A (en) | Manufacture of biaxially oriented polyether ether ketone film | |
| KR0173730B1 (en) | Manufacturing method of biaxially oriented polyester film | |
| KR0173732B1 (en) | Manufacturing method of biaxially oriented polyester film | |
| JP2992586B2 (en) | Method for producing biaxially oriented polyester film | |
| KR100258571B1 (en) | Process for the preparation of biaxially oriented polyester film having good thickness uniformity | |
| KR0173731B1 (en) | Manufacturing method of biaxially oriented polyester film | |
| KR0142039B1 (en) | Process for preparing biaxially oriented polyester film | |
| KR0173727B1 (en) | Manufacturing method of biaxially oriented polyester film | |
| JPH03264334A (en) | Manufacture of polyester film | |
| KR0140300B1 (en) | Process for preparing biaxially oriented polyester film | |
| JPS58118220A (en) | Preparation of biaxial orientated polyethylen terephthalate film | |
| JPS6360730A (en) | Preparation of biaxially oriented polyethylene-2,6-naphthalate film having little thickness unevenness | |
| KR100258569B1 (en) | Process for the preparation of biaxially oriented polyester film having good thickness uniformity | |
| KR0140294B1 (en) | Process for preparing biaxially oriented polyester film | |
| JPH0334458B2 (en) | ||
| KR20010048598A (en) | Nylon tubular film and preparation thereof | |
| US3962183A (en) | Polyethylene-1,2-diphenoxyethane-4,4'-dicarboxylate uniaxially stretched films of good dimensional stability and anti-fibrillation | |
| JPH04456B2 (en) |