JPH02111511A - Method for making film by casting - Google Patents
Method for making film by castingInfo
- Publication number
- JPH02111511A JPH02111511A JP26459288A JP26459288A JPH02111511A JP H02111511 A JPH02111511 A JP H02111511A JP 26459288 A JP26459288 A JP 26459288A JP 26459288 A JP26459288 A JP 26459288A JP H02111511 A JPH02111511 A JP H02111511A
- Authority
- JP
- Japan
- Prior art keywords
- film
- casting
- support
- carrier
- cast
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005266 casting Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000000463 material Substances 0.000 claims description 16
- 229920000642 polymer Polymers 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 229920002284 Cellulose triacetate Polymers 0.000 abstract description 5
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 abstract description 5
- 238000001879 gelation Methods 0.000 abstract description 4
- 230000001771 impaired effect Effects 0.000 abstract description 2
- 230000008021 deposition Effects 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 7
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- 230000015271 coagulation Effects 0.000 description 5
- 238000005345 coagulation Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000013557 residual solvent Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- XZZNDPSIHUTMOC-UHFFFAOYSA-N triphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)(=O)OC1=CC=CC=C1 XZZNDPSIHUTMOC-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Moulding By Coating Moulds (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は高分子溶液による製膜方法に関し、特にセルロ
ーストリアセテートフィルムの製造に適する流延製膜法
に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a film forming method using a polymer solution, and particularly to a casting film forming method suitable for producing cellulose triacetate films.
高分子溶液による製膜方法の例として、例えば写真感光
材料に用いられるセルローストリアセテートフィルムの
流延製膜法の場合、一般にエンドレスのバンド或はドラ
ム（以下支持体という）上に流延後、１回転する間に膜
状物をフィルムとして剥ぎ取り製膜する。その際、溶媒
としては一般にメチレンクロライド単独又は一部アルコ
ールなどを混合した溶媒が用いられる。この流延製膜法
において、製膜速度を上げる方法としては、支持体上で
乾燥を早く行う方法や、上記膜状物を支持体から剥がす
際に膜状物を冷却し、凝固を促進し剥離力に抗する引張
強度を付与する方法がある。As an example of a film forming method using a polymer solution, for example, in the case of a casting film forming method for cellulose triacetate film used for photographic light-sensitive materials, generally after casting on an endless band or drum (hereinafter referred to as a support), While rotating, the membranous material is peeled off and formed into a film. In this case, as a solvent, methylene chloride alone or a solvent mixed with a portion of alcohol or the like is generally used. In this casting film-forming method, methods for increasing the film-forming speed include speeding drying on the support, and cooling the film-like material when peeling it from the support to accelerate solidification. There is a method of imparting tensile strength that resists peeling force.
しかしながら前者の方法においては急激な乾燥を行うと
膜状物に発泡を生じたりして品質の面から限界があり、
従来後者の凝固を促進する方法が種々検討されている。However, the former method has limitations in terms of quality because rapid drying may cause foaming in the film-like material.
Conventionally, various methods for promoting the latter coagulation have been studied.
例えば特開昭５４−４８８６２号、特公昭４５−９０７
４号等にはブタノール、シクロヘキサン等の貧溶媒を添
加して凝固（以下、ゲル化という）を速める方法が開示
されており、米国特許２２２１０１９号には金属塩を添
加し、ゲル化を促進する方法が開示されている。For example, JP-A No. 54-48862, JP-A No. 45-907
No. 4 etc. disclose a method of accelerating coagulation (hereinafter referred to as gelation) by adding a poor solvent such as butanol or cyclohexane, and US Pat. No. 2,221,019 discloses a method of adding a metal salt to accelerate gelation. A method is disclosed.
しかしながら、上記のごとき溶媒組成のみでは充分な凝
固速度が得られないため、支持体を冷却することにより
凝固を促進する方法が例えば米国特許２３１９０５２号
に開示されている。このような方法は有効ではあるが、
次のごとき問題が生ずる。However, since a sufficient coagulation rate cannot be obtained with the above solvent composition alone, a method of accelerating coagulation by cooling the support is disclosed, for example, in US Pat. No. 2,319,052. Although this method is effective,
The following problems arise.
すなわち流延されたセルローストリアセテート溶液によ
る膜状物の凝固促進のため、特に剥ぎ取る前に支持体を
冷却すると、該膜状物を剥が取られ、更に次ぎの流延が
行われる間、支持体が大気に露出されるが、この間に支
持体上に露が出来てしまう。このため次ぎに流延が行わ
れた場合、支持体に接する面が失透し、フィルムの透明
性が損なわれるという問題が生ずるのである。In other words, in order to accelerate the coagulation of the film-like material by the cast cellulose triacetate solution, especially if the support is cooled before peeling off, the film-like material will be peeled off, and the support will remain solid during the next casting. is exposed to the atmosphere, during which time dew forms on the support. Therefore, when casting is performed next, the surface in contact with the support becomes devitrified, resulting in a problem that the transparency of the film is impaired.
上記のごとき問題に対し、本発明の目的は高い製膜速度
においても透明性の良好なフィルムが得られる高分子溶
液の流延製膜方法を提供することである。In order to solve the above-mentioned problems, an object of the present invention is to provide a method for casting a polymer solution to form a film, which allows a film with good transparency to be obtained even at a high film-forming rate.
〔発明の構成〕
本発明の上記目的は、高分子溶液を、走行するエンドレ
スの支持体上に流延し、膜状物とした後、該膜状物を支
持体より剥ぎ取ることによりフィルムを製造する方法に
おいて、該膜状物を剥がし、支持体上に次の流延が行わ
れる間、該支持体の表面温度が１５°ｃ以下であり、か
つ該支持体の露出している部分が支持体の表面温度より
低い露点の気体により満たされていることを特徴とする
流延製膜方法により達成される。[Structure of the Invention] The above object of the present invention is to cast a polymer solution onto a moving endless support to form a film-like material, and then peel the film-like material from the support to form a film. In the manufacturing method, the surface temperature of the support is 15°C or less and the exposed portion of the support is This is achieved by a casting film forming method characterized in that the film is filled with a gas having a dew point lower than the surface temperature of the support.
以下、本発明の詳細について説明する。The details of the present invention will be explained below.
第１図は流延製膜装置における流延部及びフィルム剥ぎ
取り部付近の部分断面図である。FIG. 1 is a partial sectional view of the vicinity of a casting section and a film stripping section in a casting film forming apparatus.
同図において、前記のごとき溶媒に溶解した高分子溶液
を流延部ｌよりドラムまたはバンド状の支持体（第１図
はバンドの例を示す）３上に流延し、通常剥離時のフィ
ルム中の溶媒量（残留溶媒という）が乾燥後のフィルム
重量に対して約１２０％以下となるように乾燥し、剥ぎ
取りローラ２を介してフィルム５を剥ぎ取る。この際、
前記したごとく流延膜状物４のゲル化を促進し、剥ぎ取
ったフィルム５の強度を増すためにドラム６を冷却し、
該ドラムに接する支持体３を通して流延膜状物４を冷却
する。In the same figure, a polymer solution dissolved in the solvent as described above is cast from a casting section l onto a drum or band-shaped support (Fig. 1 shows an example of a band) 3, and the film is usually peeled off. The film 5 is dried so that the amount of solvent therein (referred to as residual solvent) is about 120% or less of the weight of the film after drying, and the film 5 is peeled off using a peeling roller 2. On this occasion,
As described above, the drum 6 is cooled to promote gelation of the cast film material 4 and increase the strength of the peeled film 5.
The cast film material 4 is cooled through the support 3 in contact with the drum.
したがって、支持体３は冷却されており、剥ぎ取りロー
ラ部から流延部の間、即ち支持体が大気に露出している
部分において、大気中の水分の露点が支持体表面の温度
より高い場合は支持体表面に露を結ぶ。このため次ぎに
流延される流延膜状物の支持体に接する面が失透し、フ
ィルムの透明性が損なわれるのである。従って膜状物の
凝固を促進させるために支持体を冷やすことについても
あまり温度は下げられない。Therefore, the support 3 is cooled, and if the dew point of the moisture in the atmosphere is higher than the temperature of the surface of the support between the stripping roller section and the casting section, that is, the part where the support is exposed to the atmosphere. forms dew on the surface of the support. For this reason, the surface of the cast film that is next cast in contact with the support becomes devitrified, impairing the transparency of the film. Therefore, the temperature cannot be lowered too much when cooling the support to promote solidification of the film-like material.
本発明はこのため該露出部分を遮蔽する装置７を設け、
この中に支持体の表面温度より低い露点の気体を送入し
、遮蔽装置７内を該気体で満たすことにより支持体上に
露が生ずるのを防止し、流延膜状物のゲル化を助け、製
膜速度の向上を図るものである。尚、露出部を遮蔽装置
７で覆うことは本発明を効率的に行う上で有効な態様で
あるが、走行する支持体全部を露出している支持体の表
面温度より低い露点の気体で満たすことも有効である。The invention therefore provides a device 7 for shielding the exposed part,
A gas having a dew point lower than the surface temperature of the support is introduced into this, and the shielding device 7 is filled with the gas to prevent dew from forming on the support and to prevent gelling of the cast film. This is to improve the film forming speed. Although covering the exposed portion with the shielding device 7 is an effective mode for efficiently carrying out the present invention, it is also possible to fill the entire traveling support with a gas having a dew point lower than the surface temperature of the exposed support. It is also effective.
膜状物剥離の際の残留溶媒は約１２０％以下であり、速
度を上げるという観点からは約４０％〜１２０％ぐらい
の範囲が有用である。支持体の表面温度は１５°Ｃ以下
、好ましくは１０°Ｃ以下である。遮蔽装置７に送入す
る気体は、前記露出部分の支持体上に露を結ばない条件
を満足させる気体であれば特に限定はないが、減湿した
空気等、好ましくは液体窒素をガス化し、所望の温度に
調整して使用することである。The residual solvent during film-like material peeling is about 120% or less, and from the viewpoint of increasing the speed, a range of about 40% to 120% is useful. The surface temperature of the support is 15°C or less, preferably 10°C or less. The gas fed into the shielding device 7 is not particularly limited as long as it satisfies the condition that dew does not form on the exposed portion of the support. It is necessary to adjust the temperature to the desired temperature before use.
以下、実施例により本発明について具体的に例証する。 The present invention will be specifically illustrated below with reference to Examples.
下記組成の溶液を全長５ｍのステンレスエンドレスベル
トによる流延製膜装置を用いて剥離後膜厚が１２５μｍ
になるように製膜する。その際の条件を表１に示すごと
く変化した。表中、剥離時間は流延後剥離するまでの時
間であり、製膜速度を表す。ヘーズとは次ぎに流延して
製膜乾燥したフィルムの不透明性を測定したものである
。測定には東京電色器製の濁度計ＭＯＤＥＬ Ｔ−２６
００Ｄを使用し、試料フィルム各々２５ｍｍＸ２５ｍｍ
１枚の濁度を測定した。評価は５段階とし、５は特に
優れ、ｌは劣る。A solution with the following composition was peeled using a casting film forming device with a stainless steel endless belt with a total length of 5 m to give a film thickness of 125 μm.
Form a film so that The conditions at that time were changed as shown in Table 1. In the table, the peeling time is the time until peeling after casting, and represents the film forming speed. Haze is a measurement of the opacity of a film that is then cast and dried. For measurement, use a turbidity meter MODEL T-26 manufactured by Tokyo Denshokuki.
Using 00D, each sample film is 25mm x 25mm.
The turbidity of one sheet was measured. The evaluation is on a 5-level scale, with 5 being particularly excellent and 1 being poor.
２以下は実用上問題であり、３が限度である。A value of 2 or less is a practical problem, and a value of 3 is the limit.
溶液組成
セルローストリアセテート １００重量部トリフェニ
ルフォスフェート １５〃メチレンクロライド
４２５〃シクロヘキサン ５０〃メ
タノール ２５
表 １
☆上記表１において、周囲とは前記露出部分の周囲温度
、表面は同じく支持体の表面温度を示す。Solution composition Cellulose triacetate 100 parts by weight Triphenyl phosphate 15 Methylene chloride
425〃Cyclohexane 50〃Methanol 25 Table 1 ☆In the above Table 1, the term "surroundings" refers to the ambient temperature of the exposed portion, and the term "surface" refers to the surface temperature of the support.
Ｎｏ、４．５の露点におけるＮ、ガスとは前記遮蔽部７
に送入する気体に液体窒素をガス化して使用した場合で
ある。No. N gas at a dew point of 4.5 is the shielding part 7
This is a case where liquid nitrogen is gasified and used as the gas to be fed into the tank.
表１の結果からＮｏｌは速度が劣り、２は速度は向上す
るかヘーズが劣る。これらに対して本発明の３．４．５
は速度が速くヘーズも良好で透明性に優れる。特に５は
支持体表面温度を５℃まで下げることにより速度も速く
かつ透明性が良いことが明らかである。From the results in Table 1, No. 1 has an inferior speed, and No. 2 has an improved speed or an inferior haze. In contrast to these, 3.4.5 of the present invention
is fast, has good haze, and has excellent transparency. In particular, it is clear that No. 5 shows faster speed and better transparency by lowering the support surface temperature to 5°C.
本発明により、製膜速度が速くしかも透明性に優れる高
分子溶液の流延製膜方法を提供することが出来た。ADVANTAGE OF THE INVENTION According to the present invention, it was possible to provide a method for forming a film by casting a polymer solution, which has a high film forming speed and excellent transparency.
第１図は本発明に用いられる製膜装置の流延部及びフィ
ルム剥ぎ取り部の部分断面図である。
ｌ・・・ 流延部 ２・・・ 剥ぎ取り部３・・
・ 支持体 ４・・・ 流延膜状物５・・・ フ
ィルム ６・・・ 冷却ドラム７・・・ 遮蔽装置FIG. 1 is a partial sectional view of a casting section and a film stripping section of a film forming apparatus used in the present invention. l... Casting part 2... Stripping part 3...
- Support 4... Casting membrane material 5... Film 6... Cooling drum 7... Shielding device
Claims (1)
、膜状物とした後、該膜状物を支持体より剥ぎ取ること
によりフィルムを製造する方法において、該膜状物を剥
がし、支持体上に次の流延が行われる間、該支持体の表
面温度が１５℃以下であり、かつ該支持体が露出してい
る部分が支持体の表面温度より低い露点の気体により満
たされていることを特徴とする流延製膜法。A method of producing a film by casting a polymer solution onto a moving endless support to form a film-like material and then peeling off the film-like material from the support, in which the film-like material is peeled off, While the next casting is performed on the support, the surface temperature of the support is 15°C or less, and the exposed portion of the support is filled with a gas having a dew point lower than the surface temperature of the support. This is a casting film manufacturing method characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26459288A JPH02111511A (en) | 1988-10-20 | 1988-10-20 | Method for making film by casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26459288A JPH02111511A (en) | 1988-10-20 | 1988-10-20 | Method for making film by casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02111511A true JPH02111511A (en) | 1990-04-24 |
Family
ID=17405443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26459288A Pending JPH02111511A (en) | 1988-10-20 | 1988-10-20 | Method for making film by casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02111511A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0557739A (en) * | 1991-08-29 | 1993-03-09 | Fuji Photo Film Co Ltd | Casting film forming method |
| US5611985A (en) * | 1995-05-23 | 1997-03-18 | Sekisui Chemical Co., Ltd. | Method of manufacturing a polysulfone resin film and a retardation film |
| US5686036A (en) * | 1996-01-11 | 1997-11-11 | Eastman Kodak Company | Process for making a cellulose triacetate photographic film base |
| JPH106351A (en) * | 1996-06-26 | 1998-01-13 | Konica Corp | Preparation of cellulose triacetate film and preparation of member for liquid crystal displaying |
| JP2003071863A (en) * | 2001-09-05 | 2003-03-12 | Konica Corp | Method for manufacturing cellulose ester film |
| JP2006306060A (en) * | 2005-03-28 | 2006-11-09 | Fuji Photo Film Co Ltd | Solution film forming method |
| JP2007069562A (en) * | 2005-09-09 | 2007-03-22 | Toyobo Co Ltd | Manufacturing method of polymer film |
| JP2008265304A (en) * | 2007-03-26 | 2008-11-06 | Fujifilm Corp | Method for producing cellulose acylate film |
| JP2012179799A (en) * | 2011-03-01 | 2012-09-20 | Konica Minolta Advanced Layers Inc | Method and apparatus for forming optical film, optical film, polarization plate, and liquid crystal display device |
| JP2013063511A (en) * | 2011-09-15 | 2013-04-11 | Fujifilm Corp | Metal drum, casting apparatus, method for forming casting film, and solution film forming method |
-
1988
- 1988-10-20 JP JP26459288A patent/JPH02111511A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0557739A (en) * | 1991-08-29 | 1993-03-09 | Fuji Photo Film Co Ltd | Casting film forming method |
| US5611985A (en) * | 1995-05-23 | 1997-03-18 | Sekisui Chemical Co., Ltd. | Method of manufacturing a polysulfone resin film and a retardation film |
| US5686036A (en) * | 1996-01-11 | 1997-11-11 | Eastman Kodak Company | Process for making a cellulose triacetate photographic film base |
| JPH106351A (en) * | 1996-06-26 | 1998-01-13 | Konica Corp | Preparation of cellulose triacetate film and preparation of member for liquid crystal displaying |
| JP2003071863A (en) * | 2001-09-05 | 2003-03-12 | Konica Corp | Method for manufacturing cellulose ester film |
| JP4730503B2 (en) * | 2001-09-05 | 2011-07-20 | コニカミノルタホールディングス株式会社 | Method for producing cellulose ester film |
| JP2006306060A (en) * | 2005-03-28 | 2006-11-09 | Fuji Photo Film Co Ltd | Solution film forming method |
| JP2007069562A (en) * | 2005-09-09 | 2007-03-22 | Toyobo Co Ltd | Manufacturing method of polymer film |
| JP2008265304A (en) * | 2007-03-26 | 2008-11-06 | Fujifilm Corp | Method for producing cellulose acylate film |
| JP2012179799A (en) * | 2011-03-01 | 2012-09-20 | Konica Minolta Advanced Layers Inc | Method and apparatus for forming optical film, optical film, polarization plate, and liquid crystal display device |
| JP2013063511A (en) * | 2011-09-15 | 2013-04-11 | Fujifilm Corp | Metal drum, casting apparatus, method for forming casting film, and solution film forming method |
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