JP4195777B2 - Polymer film winding method and apparatus - Google Patents

Polymer film winding method and apparatus Download PDF

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Publication number
JP4195777B2
JP4195777B2 JP2001017109A JP2001017109A JP4195777B2 JP 4195777 B2 JP4195777 B2 JP 4195777B2 JP 2001017109 A JP2001017109 A JP 2001017109A JP 2001017109 A JP2001017109 A JP 2001017109A JP 4195777 B2 JP4195777 B2 JP 4195777B2
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Prior art keywords
winding
polymer film
core
thickness
wound
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JP2002220143A (en
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大介 藤倉
直明 鈴木
正幸 川原田
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Fujifilm Corp
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Fujifilm Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、高分子フイルムの巻取り方法及び装置に関し、更に詳しくは高分子フイルムに巻ズレ等の不具合が発生することのない高分子フイルムの巻取り方法及び装置に関するものである。
【0002】
【従来の技術】
セルローストリアセテート、ポリカーボネート、セロファン等の高分子フイルムの製造方法として、溶液製膜方法が一般に知られている。この溶液製膜方法は、連続的に回転するエンドレスバンドもしくはドラムからなる支持体上にそれぞれの高分子溶液を流延し、これを乾燥風などによって乾燥し、この後に高分子フイルムを支持体から剥離することにより製膜する。支持体から剥離された高分子フイルムは、必要に応じて、幅方向への延伸やさらに乾燥が行われたのち、巻取り装置に送られて巻芯に巻き取られる。
【0003】
このとき、すでに巻芯に巻き取られている高分子フイルムと、巻き取られんとする高分子フイルムとの間にエアが巻き込まれないようにするため、高分子フイルムに所定の巻取り張力を掛けながら巻芯に巻き取る。従来では、巻取り張力を高分子フイルムの厚みや巻速度に依存せずに、巻太るにつれて巻取り張力を減じている。
【0004】
【発明が解決しようとする課題】
しかしながら、従来の高分子フイルムの巻取り方法及び装置では、巻取り張力が低すぎると巻き取られた高分子フイルムの間に巻き込まれるエアの含有率が高くなって巻ズレが発生しやすい。また、逆に巻取り張力が高すぎると巻圧が増大して高分子フイルムの厚み違いが強調され、凹凸による筋状の変形や、巻シワが発生してしまう。さらに、高分子フイルムの薄手化、長尺化及び巻取りの高速化に伴い、従来の巻取り方法では上記不具合を解決することができず、製品得率を損なってしまう。
【0005】
本発明は、上記問題を解決するためになされたものであり、高分子フイルムを巻芯に巻き取る際に、巻ズレ、巻スジ及び巻シワなどの不具合が発生することのない高分子フイルムの巻取り方法及び装置を提供することを目的とする。
【0006】
【課題を解決するための手段】
上記目的を達成するために、本発明は、50〜120μmの範囲内の一定な厚みtを有する高分子フイルムをレイオンロールにてニップしながら、50〜100m/minの範囲内の一定な巻速度Vで巻芯に巻き取り、前記巻芯に巻き取られる前記高分子フィルムの全巻長Laが2500〜4000mである高分子フイルムの巻取り方法において、前記高分子フィルムの厚みt及び巻速度Vに応じて下式により定められる範囲内の巻取り張力Tsで、前記高分子フィルムを前記巻芯に巻き取り始め、前記高分子フィルムの厚みtに応じて下式により定められる範囲内の押圧力Pで、前記レイオンロールを前記巻芯に向かって押し付けながら前記高分子フィルムを巻き取り、前記高分子フィルムの厚みt及び全巻長Laに応じて前記巻取り張力の低減率αを下式により決定し、前記巻取り張力を前記低減率αによって低減させながら前記高分子フィルムを巻き取ることを特徴とする。
t×V/300≦Ts≦t×V/300+30
t/25≦P≦t/5
t/(10×La)≦α≦t/(2×La)
【0007】
前記高分子フィルムはセルローストリアセテートフィルムであることが好ましい。
【0008】
また、本発明は、50〜120μmの範囲内の一定な厚みtを有する高分子フイルムをレイオンロールにてニップしながら、50〜100m/minの範囲内の一定な巻速度Vで巻芯に巻き取り、前記巻芯に巻き取られる前記高分子フィルムの全巻長Laが2500〜4000mである高分子フイルムの巻取り装置において、前記レイオンロールを前記巻芯に向かって押圧する押圧手段と、前記高分子フィルムを前記巻芯に巻き取り始める際の巻取り張力Tsを、前記高分子フィルムの厚みt及び巻速度Vに応じて下式により定められる範囲内で制御し、前記押圧手段の押圧力Pを、前記高分子フィルムの厚みtに応じて下式により定められる範囲内で制御し、前記巻取り張力の低減率αを、前記高分子フィルムの厚みt及び全巻長Laに応じて下式により定められる範囲内で制御する制御手段とを備えることを特徴とする。
t×V/300≦Ts≦t×V/300+30
t/25≦P≦t/5
t/(10×La)≦α≦t/(2×La)
【0012】
【発明の実施の形態】
図1は、フイルム巻取り機の構成を示す概略図である。フイルム巻取り機10は、巻芯11、架台12、モータ13、レイオンロール14、押圧機構15、張力測定ロール16、張力センサ17、ダンサロール18、ダンサ機構19、ガイドロール20、コントローラ25から構成されている。
【0013】
巻芯11は架台12に回動自在に保持され、モータ13によって回転駆動される。コントローラ20はモータ13の回転を制御し、高分子フイルム27が所定の巻速度で巻き取られるように、巻芯11を矢印A方向に回転させる。この回転により、高分子フイルム27は巻芯11に順次巻き取られて行く。高分子フイルム27は、不図示の溶液製膜装置で作製され、必要に応じて設けられる延伸装置及び乾燥装置を通って矢印B方向に搬送される。
【0014】
高分子フイルム27の搬送経路の途中には、張力測定ロール16、ダンサロール18、ガイドロール20がそれぞれ配置されている。張力測定ロール16には張力センサ17が接続される。また、ダンサロール18には、このダンサロール18を矢印C方向に移動させるダンサ機構19が設けられている。張力センサ17は、張力測定ロール16を介して高分子フイルム27の巻取り張力を測定する。測定された巻取り張力はコントローラ25に入力される。コントローラ25は、この測定結果に基づいて、ダンサ機構19を介してダンサロール18を矢印C方向に移動して高分子フイルム27の巻取り張力を調整する。
【0015】
高分子フイルム27の巻始めにおいて、高分子フイルム27の厚みをt(μm)、巻速度をV(m/min)、巻始めの際の巻取り張力をTs(kgf/m幅)とすると、コントローラ25は、張力センサ17から入力される測定結果に基づいて、ダンサ機構19を介してダンサロール18を図中C方向に移動させ、巻取り張力Tsを下記(1)式で示す範囲内に設定された値となるように調整しながら高分子フイルム27を巻始める。
t×V/300≦Ts≦t×V/300+30・・・(1)
【0016】
ここで、巻始めの際の巻取り張力Tsが、上記(1)式の範囲を超えると巻スジや巻シワなどの不具合を生じ、上記(1)式の範囲に達しないと巻圧が不足して巻ズレなどの不具合を生じる。
【0017】
また、高分子フイルム27の巻取り中において、巻取り中の巻取り張力をT(kgf/m幅)、高分子フイルム27の全巻長をLa(m)、巻芯11にすでに巻き取られた高分子フイルム27の巻長をLb(m)、巻取り張力の低減率をαとすると、コントローラ25は、下記(2)式で示す範囲内の低減率αと、巻始めの際の巻取り張力Tsと高分子フイルム27の巻長Lbとに基づき、下記(3)式に示すように、巻取り中の現時点における巻取り張力Tを求める。そして、コントローラ25は上記と同様にしてダンサローラ18を図中C方向に移動させ、巻取り張力Tを調整しながら高分子フイルム27を巻き取る。
t/(10×La)≦α≦t/(2×La)・・・(2)
T=Ts−α×Lb・・・(3)
【0018】
ここで、巻取り張力の低減率αが、上記(2)式の範囲を超えると巻圧が不足して巻ズレなどの不具合が生じ、上記(2)式の範囲に達しないと巻圧が過大になって巻スジや巻シワなどの不具合が生じる。
【0019】
レイオンロール14は、巻芯11の回転軸と平行な回転軸を有し、巻芯11に巻き取られた高分子フイルム27に当接する。レイオンロール14には押圧機構15が設けられている。この押圧機構15は、コントローラ25によって制御され、巻芯11に向かって所定の押圧力でレイオンロール14を押し付ける。これにより、巻芯11に巻き取られる高分子フイルム27の巻き込みエアのスクイズ効率が高まり、よってエア含有率を低くすることができる。
【0020】
コントローラ25は、高分子フイルム27の厚みをt(μm)、押圧力をP(kgf/m幅)としたときに、下記(4)式で示す範囲内に設定された値となるようにレイオンロール14の押圧力Pを調整する。
t/25≦P≦t/5・・・(4)
【0021】
ここで、押圧力Pが、上記(4)式の範囲を超えると巻スジや巻シワなどの不具合が生じ、上記(4)式の範囲に達しないと巻き込みエアのスクイズ効果が小さく巻ズレなどの不具合が生じる。
【0022】
こうして、フイルム巻取り機10は、高分子フイルム27の巻始めの際には、巻取り張力を高分子フイルム27の厚みtと巻速度Vに応じた巻取り張力Tsに調整しながら高分子フイルム27を巻取り始める。そして、高分子フイルム27の厚みtに応じた押圧力Pにてレイオンロール14を巻芯11に向かって押し付けながら、高分子フイルム27の厚みt及び全巻長Laに応じた巻取り張力の低減率αで、すでに巻芯11に巻き取られた高分子フイルム27の巻長Lbに応じて巻取り張力Tを低減させつつ高分子フイルム27を巻き取るので、巻ズレ、巻スジ及び巻シワなどの不具合が発生することなくフイルムロール30を形成することができる。
【0023】
なお、高分子フイルム27の厚みtは10〜300μmが好ましく、より好ましくは30〜150μmである。また、巻速度Vは10〜300m/minが好ましく、より好ましくは30〜200m/minである。さらに、高分子フイルム27の全巻長は1000〜10000mが好ましく、より好ましくは1000〜5000mである。
【0024】
【実施例】
以下、実施例を挙げて本発明を詳細に説明するが、本発明はこれに限定されるものではない。
【0025】
〈フイルムロールの品質評価方法〉
高分子フイルム27の巻取りが完了したフイルムロール30の外観を目視観察して、巻ズレ、巻スジ、巻シワの各不具合が発生しているか否かを下記のように評価した。
○:不具合が認められないもの
×:不具合が認められるもの
【0026】
[実施例1]
厚みが50μmで、幅が1500mmのセルローストリアセテートフイルム(以下、TACフイルムという)を、フイルム巻取り機10を使用して直径が200mmの巻芯11に巻き取った。このとき、巻速度Vを50,100(m/min)、全巻長Laを2500,4000(m)、巻始めの巻取り張力Tsを10,15,20,30,35,40(kgf/m幅)、レイオンロール14の押圧力Pを1,5,12(kgf/m幅)、巻取り張力の低減率αを1/1000,1/500,1/250,1/150として巻き取った。
【0027】
実施例1−1から1−10の巻取り条件を表1に、また実施例1−1から1−10の評価結果を表2に示した。
【0028】
【表1】

Figure 0004195777
【0029】
【表2】
Figure 0004195777
【0030】
〈結果〉
実施例1−2及び1−3ではレイオンローラ14による押圧力が不足又は過大であったため、実施例1−5及び1−7では巻取り張力が不足又は過大であったため、実施例1−9及び1−10では巻取り張力の低減率が不足又は過大であったためフイルムロール30に巻ズレ、巻スジ、巻シワがそれぞれ観察された。これに対して、実施例1−1,1−4,1−6及び1−8では、不具合は観察されなかった。
【0031】
[実施例2]
厚みが80μmで、幅が1500mmのTACフイルムを、フイルム巻取り機10を使用して直径200mmの巻芯11に巻き取った。このとき、巻速度Vを50,100(m/min)、巻始めの巻取り張力Tsを20,30,40,60(kgf/m幅)、巻取り張力の低減率αを1/300,1/200,1/100として巻き取った。なお、全巻長Laは2500(m)、レイオンロール14の押圧力Pは8(kgf/m幅)と一定であった。
【0032】
実施例2−1から2−4の巻取り条件を表3に、また、実施例2−1から2−4の評価結果を表4に示した。
【0033】
【表3】
Figure 0004195777
【0034】
【表4】
Figure 0004195777
【0035】
〈結果〉
実施例2−3及び2−4では、巻取り張力が不足又は過大であったためフイルムロール30に巻ズレ、巻スジ、巻シワがそれぞれ観察された。これに対して、実施例2−1及び2−2では、不具合は観察されなかった。
【0036】
[実施例3]
厚みが120μmで、幅が1500mmのTACフイルムを、フイルム巻取り機10を使用して直径200mmの巻芯11に巻き取った。このとき、巻速度Vを50,100(m/min)、全巻長Laを2500,4000(m)、巻始めの巻取り張力Tsを40,50(kgf/m幅)、レイオンロール14の押圧力Pを4,10(kgf/m幅)、巻取り張力の低減率αを1/200,1/100として巻き取った。
【0037】
実施例3−1から3−4の巻取り条件を表5に、また、実施例3−1から3−4の評価結果を表6に示した。
【0038】
【表5】
Figure 0004195777
【0039】
【表6】
Figure 0004195777
【0040】
〈結果〉
実施例3−4では、レイオンロール14の押圧力が不足していたためフイルムロール30に巻ズレが観察された。これに対して、実施例3−1,3−2及び3−3では、不具合は観察されなかった。
【0041】
【発明の効果】
以上のように、本発明の高分子フイルムの巻取り方法によれば、高分子フイルムの厚み及び巻速度に応じて所定の巻取り張力で高分子フイルムを巻芯に巻き取り始め、高分子フイルムの厚みに応じて所定の押圧力でレイオンロールを巻芯に向かって押し付けながら巻き取るようにしたので、巻ズレ、巻スジ、巻シワなどの不具合が発生することなく高分子フイルムを巻き取ることができる。
【0042】
また、巻芯に高分子フイルムを巻取り中には、高分子フイルムの厚み及び巻芯に巻き取られる高分子フイルムの全巻長に応じて低減率を決定し、すでに巻芯に巻き取られている高分子フイルムの巻長に応じて巻取り張力を低減させながら高分子フイルムを巻き取るようにしたので、巻ズレ、巻スジ、巻シワなどの不具合が発生することなく高分子フイルムを巻き取ることができる。
【図面の簡単な説明】
【図1】フイルム巻取り機の構成を示す概略図である。
【符号の説明】
10 フイルム巻取り機
11 巻芯
12 架台
13 モータ
14 レイオンロール
15 押圧機構
16 張力測定ロール
17 張力センサ
18 ダンサロール
19 ダンサ機構
20 ガイドロール
25 コントローラ
27 高分子フイルム
30 フイルムロール[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method and an apparatus for winding a polymer film, and more particularly to a method and an apparatus for winding a polymer film in which defects such as winding deviation do not occur in the polymer film.
[0002]
[Prior art]
As a method for producing a polymer film such as cellulose triacetate, polycarbonate, cellophane, etc., a solution casting method is generally known. In this solution casting method, each polymer solution is cast on a support consisting of a continuously rotating endless band or drum, and the polymer solution is dried by a drying wind or the like. Thereafter, the polymer film is removed from the support. A film is formed by peeling. The polymer film peeled from the support is stretched in the width direction and further dried as necessary, and then sent to a winding device to be wound on a core.
[0003]
At this time, in order to prevent air from being caught between the polymer film already wound on the winding core and the polymer film to be wound, while applying a predetermined winding tension to the polymer film Take up around the core. Conventionally, the winding tension is reduced as the winding thickness increases without depending on the thickness and winding speed of the polymer film.
[0004]
[Problems to be solved by the invention]
However, in the conventional polymer film winding method and apparatus, if the winding tension is too low, the content of air trapped between the wound polymer films is high, and winding deviation tends to occur. On the other hand, if the winding tension is too high, the winding pressure increases and the difference in thickness of the polymer film is emphasized, resulting in streak deformation due to unevenness and winding wrinkles. Furthermore, with the thinning, lengthening, and speeding up of the polymer film, the conventional winding method cannot solve the above problems, and the product yield is impaired.
[0005]
The present invention has been made in order to solve the above-described problem, and when a polymer film is wound around a winding core, the polymer film is free from problems such as winding deviation, winding stripes and winding wrinkles. An object is to provide a winding method and apparatus.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a constant winding speed within a range of 50 to 100 m / min, while a polymer film having a constant thickness t within a range of 50 to 120 μm is nipped by a rayon roll. In the winding method of the polymer film in which the entire winding length La of the polymer film wound around the winding core is V is 2500 to 4000 m, the thickness t of the polymer film and the winding speed V are Accordingly , the polymer film starts to be wound around the core with a winding tension Ts within a range determined by the following formula, and a pressing force P within a range determined by the following formula according to the thickness t of the polymer film. Then, the polymer film is wound up while pressing the Rayon roll toward the core, and the winding tension is determined according to the thickness t and the total winding length La of the polymer film. The reduction rate α is determined by the following equation, and the polymer film is wound while the winding tension is reduced by the reduction rate α .
t × V / 300 ≦ Ts ≦ t × V / 300 + 30
t / 25 ≦ P ≦ t / 5
t / (10 × La) ≦ α ≦ t / (2 × La)
[0007]
The polymer film is preferably a cellulose triacetate film.
[0008]
In addition, the present invention can wind a polymer film having a constant thickness t within a range of 50 to 120 μm at a constant winding speed V within a range of 50 to 100 m / min while niping a polymer film having a constant thickness t within a range of 50 to 100 m / min. taken, the winding apparatus of the polymer film whole volume length La is 2500~4000m of the polymer film to be wound on the winding core, and a pressing means for pressing against the cold roll to the winding core, the high The winding tension Ts when starting the winding of the molecular film around the winding core is controlled within the range determined by the following equation according to the thickness t and winding speed V of the polymer film, and the pressing force P of the pressing means Is controlled within the range defined by the following equation according to the thickness t of the polymer film, and the reduction rate α of the winding tension depends on the thickness t of the polymer film and the total winding length La. And a controlling means for controlling within a range defined by the following formula Te.
t × V / 300 ≦ Ts ≦ t × V / 300 + 30
t / 25 ≦ P ≦ t / 5
t / (10 × La) ≦ α ≦ t / (2 × La)
[0012]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a schematic diagram showing the configuration of a film winder. The film winder 10 includes a winding core 11, a gantry 12, a motor 13, a rayon roll 14, a pressing mechanism 15, a tension measuring roll 16, a tension sensor 17, a dancer roll 18, a dancer mechanism 19, a guide roll 20, and a controller 25. Has been.
[0013]
The winding core 11 is rotatably held on the gantry 12 and is driven to rotate by a motor 13. The controller 20 controls the rotation of the motor 13 to rotate the winding core 11 in the direction of arrow A so that the polymer film 27 is wound at a predetermined winding speed. By this rotation, the polymer film 27 is sequentially wound around the core 11. The polymer film 27 is produced by a solution casting apparatus (not shown), and is conveyed in the direction of arrow B through a stretching apparatus and a drying apparatus that are provided as necessary.
[0014]
A tension measuring roll 16, a dancer roll 18, and a guide roll 20 are disposed in the middle of the transport path of the polymer film 27, respectively. A tension sensor 17 is connected to the tension measuring roll 16. The dancer roll 18 is provided with a dancer mechanism 19 that moves the dancer roll 18 in the direction of arrow C. The tension sensor 17 measures the winding tension of the polymer film 27 via the tension measuring roll 16. The measured winding tension is input to the controller 25. The controller 25 adjusts the winding tension of the polymer film 27 by moving the dancer roll 18 in the arrow C direction via the dancer mechanism 19 based on the measurement result.
[0015]
At the beginning of winding of the polymer film 27, if the thickness of the polymer film 27 is t (μm), the winding speed is V (m / min), and the winding tension at the beginning of winding is Ts (kgf / m width), Based on the measurement result input from the tension sensor 17, the controller 25 moves the dancer roll 18 in the direction C in the figure via the dancer mechanism 19 so that the winding tension Ts falls within the range indicated by the following equation (1). The polymer film 27 is started to be wound while adjusting to a set value.
t × V / 300 ≦ Ts ≦ t × V / 300 + 30 (1)
[0016]
Here, if the winding tension Ts at the start of winding exceeds the range of the above formula (1), problems such as winding streaks and wrinkles occur, and if it does not reach the range of the above formula (1), the winding pressure is insufficient. Causes problems such as winding misalignment.
[0017]
Further, during the winding of the polymer film 27, the winding tension during winding was T (kgf / m width), the entire winding length of the polymer film 27 was La (m), and the winding core 11 was already wound. If the winding length of the polymer film 27 is Lb (m) and the reduction rate of the winding tension is α, the controller 25 can reduce the reduction rate α within the range shown by the following equation (2) and the winding at the start of winding Based on the tension Ts and the winding length Lb of the polymer film 27, the winding tension T at the present time during winding is obtained as shown in the following equation (3). Then, the controller 25 moves the dancer roller 18 in the direction C in the figure in the same manner as described above to wind up the polymer film 27 while adjusting the winding tension T.
t / (10 × La) ≦ α ≦ t / (2 × La) (2)
T = Ts−α × Lb (3)
[0018]
Here, if the reduction rate α of the winding tension exceeds the range of the above formula (2), the winding pressure becomes insufficient and a problem such as winding deviation occurs, and if it does not reach the range of the above formula (2), the winding pressure is reduced. It becomes excessive and causes problems such as winding lines and wrinkles.
[0019]
The lion roll 14 has a rotation axis parallel to the rotation axis of the core 11 and abuts on the polymer film 27 wound around the core 11. A pressing mechanism 15 is provided on the rayon roll 14. The pressing mechanism 15 is controlled by the controller 25 and presses the lion roll 14 toward the core 11 with a predetermined pressing force. Thereby, the squeeze efficiency of the entrainment air of the polymer film 27 wound around the core 11 is increased, and thus the air content can be lowered.
[0020]
When the thickness of the polymer film 27 is set to t (μm) and the pressing force is set to P (kgf / m width), the controller 25 is controlled so that the value is set within the range expressed by the following equation (4). The pressing force P of the roll 14 is adjusted.
t / 25 ≦ P ≦ t / 5 (4)
[0021]
Here, if the pressing force P exceeds the range of the above formula (4), problems such as winding stripes and wrinkles occur. If the pressing force P does not reach the range of the above formula (4), the squeeze effect of the entrained air is small and the winding slippage, etc. The problem occurs.
[0022]
Thus, the film winder 10 adjusts the winding tension to the winding tension Ts corresponding to the thickness t and the winding speed V of the polymer film 27 at the start of winding of the polymer film 27. Start winding 27. The rate of reduction of the winding tension according to the thickness t of the polymer film 27 and the total winding length La while pressing the lion roll 14 toward the core 11 with the pressing force P corresponding to the thickness t of the polymer film 27. The polymer film 27 is wound while the winding tension T is reduced according to the winding length Lb of the polymer film 27 that has already been wound around the winding core 11 by α, so that winding misalignment, winding stripes, wrinkles, etc. The film roll 30 can be formed without causing problems.
[0023]
The thickness t of the polymer film 27 is preferably 10 to 300 μm, more preferably 30 to 150 μm. The winding speed V is preferably 10 to 300 m / min, more preferably 30 to 200 m / min. Further, the total winding length of the polymer film 27 is preferably 1000 to 10,000 m, more preferably 1000 to 5000 m.
[0024]
【Example】
EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated in detail, this invention is not limited to this.
[0025]
<Film roll quality evaluation method>
The appearance of the film roll 30 in which the winding of the polymer film 27 was completed was visually observed, and whether or not each defect of winding deviation, winding stripe, and winding wrinkle occurred was evaluated as follows.
○: No failure found x: Failure found [0026]
[Example 1]
A cellulose triacetate film (hereinafter referred to as TAC film) having a thickness of 50 μm and a width of 1500 mm was wound around a core 11 having a diameter of 200 mm using a film winder 10. At this time, the winding speed V is 50,100 (m / min), the total winding length La is 2500,4000 (m), and the winding tension Ts at the beginning of the winding is 10,15,20,30,35,40 (kgf / m Width), the pressing force P of the lion roll 14 is 1, 5, 12 (kgf / m width), and the winding tension reduction rate α is 1/1000, 1/500, 1/250, 1/150. .
[0027]
The winding conditions of Examples 1-1 to 1-10 are shown in Table 1, and the evaluation results of Examples 1-1 to 1-10 are shown in Table 2.
[0028]
[Table 1]
Figure 0004195777
[0029]
[Table 2]
Figure 0004195777
[0030]
<result>
In Examples 1-2 and 1-3, since the pressing force by the lion roller 14 was insufficient or excessive, in Examples 1-5 and 1-7, the winding tension was insufficient or excessive. And 1-10, the reduction rate of the winding tension was insufficient or excessive, so that winding deviation, winding stripes, and winding wrinkles were observed on the film roll 30, respectively. On the other hand, in Examples 1-1, 1-4, 1-6, and 1-8, no defects were observed.
[0031]
[Example 2]
A TAC film having a thickness of 80 μm and a width of 1500 mm was wound around a core 11 having a diameter of 200 mm using a film winder 10. At this time, the winding speed V is 50, 100 (m / min), the winding tension Ts at the beginning of the winding is 20, 30, 40, 60 (kgf / m width), and the reduction rate α of the winding tension is 1/300, It wound up as 1/200, 1/100. The total winding length La was 2500 (m), and the pressing force P of the rayon roll 14 was constant at 8 (kgf / m width).
[0032]
Table 3 shows the winding conditions of Examples 2-1 to 2-4, and Table 4 shows the evaluation results of Examples 2-1 to 2-4.
[0033]
[Table 3]
Figure 0004195777
[0034]
[Table 4]
Figure 0004195777
[0035]
<result>
In Examples 2-3 and 2-4, since the winding tension was insufficient or excessive, winding deviation, winding stripes and winding wrinkles were observed on the film roll 30, respectively. On the other hand, in Examples 2-1 and 2-2, no defects were observed.
[0036]
[Example 3]
A TAC film having a thickness of 120 μm and a width of 1500 mm was wound around a core 11 having a diameter of 200 mm using a film winder 10. At this time, the winding speed V is 50,100 (m / min), the total winding length La is 2500,4000 (m), the winding tension Ts at the beginning of winding is 40,50 (kgf / m width), Winding was performed with the pressure P being 4,10 (kgf / m width) and the reduction rate α of the winding tension being 1/200, 1/100.
[0037]
Table 5 shows the winding conditions of Examples 3-1 to 3-4, and Table 6 shows the evaluation results of Examples 3-1 to 3-4.
[0038]
[Table 5]
Figure 0004195777
[0039]
[Table 6]
Figure 0004195777
[0040]
<result>
In Example 3-4, winding pressure was observed on the film roll 30 because the pressing force of the lion roll 14 was insufficient. On the other hand, in Examples 3-1, 3-2 and 3-3, no defects were observed.
[0041]
【The invention's effect】
As described above, according to the method for winding a polymer film of the present invention, the polymer film starts to be wound around the core with a predetermined winding tension according to the thickness and winding speed of the polymer film. Since the lion roll is wound while pressing it toward the core with a predetermined pressing force according to the thickness of the film, the polymer film can be wound without causing problems such as winding misalignment, winding streaks, and wrinkles. Can do.
[0042]
In addition, while winding the polymer film on the core, the reduction rate is determined according to the thickness of the polymer film and the total length of the polymer film wound on the core, and it has already been wound on the core. The polymer film is wound while reducing the winding tension according to the winding length of the polymer film, so that the polymer film can be wound without causing problems such as winding misalignment, winding streaks, and wrinkles. be able to.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing the configuration of a film winder.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Film winder 11 Core 12 Base 13 Motor 14 Rayon roll 15 Press mechanism 16 Tension measuring roll 17 Tension sensor 18 Dancer roll 19 Dancer mechanism 20 Guide roll 25 Controller 27 Polymer film 30 Film roll

Claims (3)

50〜120μmの範囲内の一定な厚みtを有する高分子フイルムをレイオンロールにてニップしながら、50〜100m/minの範囲内の一定な巻速度Vで巻芯に巻き取り、前記巻芯に巻き取られる前記高分子フィルムの全巻長Laが2500〜4000mである高分子フイルムの巻取り方法において、
前記高分子フィルムの厚みt及び巻速度Vに応じて下式により定められる範囲内の巻取り張力Tsで、前記高分子フィルムを前記巻芯に巻き取り始め、
前記高分子フィルムの厚みtに応じて下式により定められる範囲内の押圧力Pで、前記レイオンロールを前記巻芯に向かって押し付けながら前記高分子フィルムを巻き取り、
前記高分子フィルムの厚みt及び全巻長Laに応じて前記巻取り張力の低減率αを下式により決定し、
前記巻取り張力を前記低減率αによって低減させながら前記高分子フィルムを巻き取ることを特徴とする高分子フィルムの巻取り方法。
t×V/300≦Ts≦t×V/300+30
t/25≦P≦t/5
t/(10×La)≦α≦t/(2×La)
While nipping the polymer film at cold roll having a constant thickness t in the range of 50 to 120 [mu] m, wound on the winding core at a constant winding speed V in a range of 50 to 100 m / min, the winding core In the winding method of the polymer film in which the total winding length La of the polymer film to be wound is 2500 to 4000 m ,
With the winding tension Ts within the range defined by the following formula depending on the thickness t and winding speed V of the polymer film, the polymer film starts to be wound around the core,
With the pressing force P within the range determined by the following equation according to the thickness t of the polymer film, the polymer film is wound while pressing the lion roll toward the core,
In accordance with the thickness t and the total winding length La of the polymer film, the reduction rate α of the winding tension is determined by the following equation:
A method for winding a polymer film, wherein the polymer film is wound while the winding tension is reduced by the reduction rate α .
t × V / 300 ≦ Ts ≦ t × V / 300 + 30
t / 25 ≦ P ≦ t / 5
t / (10 × La) ≦ α ≦ t / (2 × La)
前記高分子フィルムはセルローストリアセテートフィルムであることを特徴とする請求項1記載の高分子フィルムの巻取り方法。 The method for winding a polymer film according to claim 1, wherein the polymer film is a cellulose triacetate film . 50〜120μmの範囲内の一定な厚みtを有する高分子フイルムをレイオンロールにてニップしながら、50〜100m/minの範囲内の一定な巻速度Vで巻芯に巻き取り、前記巻芯に巻き取られる前記高分子フィルムの全巻長Laが2500〜4000mである高分子フイルムの巻取り装置において、
前記レイオンロールを前記巻芯に向かって押圧する押圧手段と、
前記高分子フィルムを前記巻芯に巻き取り始める際の巻取り張力Tsを、前記高分子フィルムの厚みt及び巻速度Vに応じて下式により定められる範囲内で制御し、前記押圧手段の押圧力Pを、前記高分子フィルムの厚みtに応じて下式により定められる範囲内で制御し、前記巻取り張力の低減率αを、前記高分子フィルムの厚みt及び全巻長Laに応じて下式により定められる範囲内で制御する制御手段とを備えることを特徴とする高分子フィルムの巻取り装置。
t×V/300≦Ts≦t×V/300+30
t/25≦P≦t/5
t/(10×La)≦α≦t/(2×La)
While nipping the polymer film at cold roll having a constant thickness t in the range of 50 to 120 [mu] m, wound on the winding core at a constant winding speed V in a range of 50 to 100 m / min, the winding core In the winding device for a polymer film in which the total winding length La of the polymer film to be wound is 2500 to 4000 m ,
Pressing means for pressing the Rayon roll toward the core;
The winding tension Ts when starting to wind the polymer film around the core is controlled within a range defined by the following equation according to the thickness t and winding speed V of the polymer film, and the pressing means The pressure P is controlled within a range determined by the following equation according to the thickness t of the polymer film, and the reduction rate α of the winding tension is reduced according to the thickness t of the polymer film and the total winding length La. A polymer film winding device comprising: control means for controlling within a range determined by the equation .
t × V / 300 ≦ Ts ≦ t × V / 300 + 30
t / 25 ≦ P ≦ t / 5
t / (10 × La) ≦ α ≦ t / (2 × La)
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