JPH0197621A - Film formation and its apparatus - Google Patents
Film formation and its apparatusInfo
- Publication number
- JPH0197621A JPH0197621A JP62255559A JP25555987A JPH0197621A JP H0197621 A JPH0197621 A JP H0197621A JP 62255559 A JP62255559 A JP 62255559A JP 25555987 A JP25555987 A JP 25555987A JP H0197621 A JPH0197621 A JP H0197621A
- Authority
- JP
- Japan
- Prior art keywords
- cast drum
- film
- cast
- contact
- nozzle
- 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
- 230000015572 biosynthetic process Effects 0.000 title description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 abstract description 10
- 238000005266 casting Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- -1 polypropylene Polymers 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
- B29C48/9175—Cooling of flat articles, e.g. using specially adapted supporting means by interposing a fluid layer between the supporting means and the flat article
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
- B29C48/914—Cooling of flat articles, e.g. using specially adapted supporting means cooling drums
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or 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、ポリエステル、ポリプロピレン等の溶融製膜
方法及び装置の改善に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an improvement in a melt film forming method and apparatus for polyester, polypropylene, etc.
ポリエステル、ポリプロピレン等の溶融製膜は、溶融原
料をスリット状の口金からキャストドラム表面上に吐出
固化して製膜するものが現状主流であり、品質向上及び
高速化の重要技術は、キャストドラムへの密着を確保す
ることが必須で重要な工業上のポイントとなっている。Currently, the mainstream method of melt film production of polyester, polypropylene, etc. is to discharge molten raw material from a slit-shaped mouthpiece onto the surface of a cast drum and solidify it to form a film. Ensuring close contact is essential and an important industrial point.
均一でかつ高い冷却効果を得るためには、キャストドラ
ムの表面の凸凹の凹部に含まれる微小な空気の介在さえ
も有害となり、できるだけ凸凹の少ない鏡面状のキヤス
トドラム表面の製作及び維持管理が重要となる。一方、
キャストドラムに水等の液体を塗り、キャストドラム表
面の凸凹部に薄層の水を介在させ、流動性を持つ水と原
料との密着により均一な冷却を行なう試みが行なわれて
いる（特公昭５５−４６８５５公報、特公昭５８−５２
８１８号公報、特公昭６１−３８０１２号公報、特開昭
５４−１５０４７７＠公報、特開昭６１−２１９６２１
号公報、特開昭６１−２１９６２２号公報、特開昭６１
−２３７６１９号公報〉。In order to obtain a uniform and high cooling effect, it is important to manufacture and maintain a mirror-like cast drum surface with as few irregularities as possible, as even the presence of minute air contained in the uneven depressions on the surface of the cast drum can be harmful. becomes. on the other hand,
Attempts have been made to apply a liquid such as water to the cast drum, and to interpose a thin layer of water on the uneven parts of the surface of the cast drum, thereby achieving uniform cooling due to the close contact between the fluid water and the raw material (Tokuko Sho). Publication No. 55-46855, Special Publication No. 58-52
No. 818, JP 61-38012, JP 54-150477@, JP 61-219621
No. 1, JP-A-61-219622, JP-A-61-Sho.
-237619 Publication>.
（発明が解決しようとする問題点）
しかし、冷却効果の確保のため熱伝導率の高い金属が使
用されるキャストドラム表面は、必ずしも親水性が良好
でなく、水をはじいてしまう。(Problems to be Solved by the Invention) However, the surface of the cast drum, in which a metal with high thermal conductivity is used to ensure a cooling effect, does not necessarily have good hydrophilicity and repels water.
これを防止するために水に界面活性剤等を添加して濡れ
性を高める試みは、この点では極めて有効であるが、添
加剤が膜上に残り、蒸着等の後加工に支障、となりまた
高い防塵雰囲気で製造すべき製品については大きな制約
となり、適用できる範囲は必ずしも広くないのである。Attempts to increase wettability by adding surfactants to water to prevent this are extremely effective in this respect, but the additives remain on the film, interfering with post-processing such as vapor deposition. This poses a major constraint on products that must be manufactured in a highly dust-proof atmosphere, and the range of applicability is not necessarily wide.
また、塗布した水の厚みが厚いと、膜と接する水の表面
は、溶融原料の高温にざらされ温度が上昇し、時には沸
騰に至ることが生じ、均一冷却の目的を果さない。伝熱
工学の計算からも経験からも水の厚みは薄い方が沸騰回
避に有利であることが判っており、薄くて厚みの均一な
水の層をつくるために、本発明者は検討を重ね、遂に本
発明に至ったのである。Furthermore, if the applied water is too thick, the surface of the water in contact with the membrane will be exposed to the high temperature of the molten raw material and its temperature will rise, sometimes boiling, thus defeating the purpose of uniform cooling. It has been known from heat transfer engineering calculations and experience that the thinner the water, the more advantageous it is to avoid boiling.In order to create a thin, even-thick layer of water, the inventors have made repeated studies. Finally, we have arrived at the present invention.
本発明の方法は、溶融原料をスリット状の口金から吐出
しキャストドラム表面に接触させ固化製膜する方法にお
いて、口金から吐出された膜が接触する位置より手前の
キャストドラム表面に、キャストドラムの表面温度より
も高い露点及び該露点よりも高い温度を有する湿り空気
を導き、該キャストドラム表面に水を結露させ、水の結
露したキャストドラム表面に口金から吐出された膜を接
触させることを特徴とするものである
また、本発明の装置は、溶融原料をスリット状の口金か
ら吐出しキレストドラム表面に接触させ固化製膜する装
置において、キャストドラム表面温度より高い露点を有
する湿り空気を発生する装置、湿り空気を噴き出すノズ
ル、及び該ノズルを包みかつキャストドラム表面に対面
するカバーであって、膜の全幅に相当する範囲を覆い、
固化された膜がキャストドラムを離れる位置と口金から
吐出された膜がキャストドラムに接触する位置との間に
設けられたカバーを具備することを特徴とするものであ
る。The method of the present invention is a method of solidifying and forming a film by discharging a molten raw material from a slit-shaped mouthpiece and bringing it into contact with the surface of a cast drum. It is characterized by introducing humid air having a dew point higher than the surface temperature and a temperature higher than the dew point to cause water to condense on the surface of the cast drum, and to bring the film discharged from the die into contact with the surface of the cast drum on which the water has been condensed. In addition, the apparatus of the present invention is an apparatus for discharging a molten raw material from a slit-shaped mouthpiece and bringing it into contact with the surface of a cast drum to form a solidified film, which generates humid air having a dew point higher than the surface temperature of the cast drum. a device, a nozzle that blows out moist air, and a cover that encloses the nozzle and faces the surface of the cast drum, covering an area corresponding to the entire width of the membrane,
It is characterized by comprising a cover provided between the position where the solidified film leaves the cast drum and the position where the film discharged from the die comes into contact with the cast drum.
図面に基いて本発明を説明する。The present invention will be explained based on the drawings.
第１図は本発明の一実ＷＡ態様を示す製膜キャスト工程
の側面図であり、第２図はその斜視図である。口金１よ
り吐出された膜２ａは、キャストドラム３に接触し冷却
され、固化した膜２ｂはキャストドラム３から離れ、引
離しローラ４を経て、次工程（図示路）へ導かれる。こ
の製膜装置では、固化された膜２ｂがキャストドラム３
を離れる位置と口金１から吐出された膜２ａがキャスト
ドラム３に接触する位置の間に、膜２の全幅に相当する
範囲を覆うように、キャストドラム３表面に対面してカ
バー５が設けられ、カバー５の°中にはノズル６が設け
られ、ノズル６からキャストドラム３の表面温度より高
い露点を有しかつ該露点より高い温度を有する湿り空気
を噴き出され、該カバー５とキャストドラム３表面とに
囲まれた空間内に湿り空気が充満される。FIG. 1 is a side view of a film forming and casting process showing an actual WA aspect of the present invention, and FIG. 2 is a perspective view thereof. The film 2a discharged from the die 1 is cooled by contacting the cast drum 3, and the solidified film 2b is separated from the cast drum 3 and guided to the next step (path shown) via a separating roller 4. In this film forming apparatus, the solidified film 2b is transferred to the cast drum 3.
A cover 5 is provided facing the surface of the cast drum 3 so as to cover an area corresponding to the entire width of the film 2 between the position where the film 2a discharged from the nozzle 1 comes into contact with the cast drum 3. , a nozzle 6 is provided in the cover 5, and humid air having a dew point higher than the surface temperature of the cast drum 3 and a temperature higher than the dew point is blown from the nozzle 6, and the cover 5 and the cast drum are blown out from the nozzle 6. The space surrounded by the three surfaces is filled with humid air.
該湿り空気の露点はキャストドラム３の表面温度より高
いのでキャストドラム３の表面に水が結露する。第１図
においては、キャストドラム３は左回りに回転している
ので、結露したキャストドラム３の表面上に口金から吐
出された膜２ａが接触することになる。Since the dew point of the humid air is higher than the surface temperature of the cast drum 3, water condenses on the surface of the cast drum 3. In FIG. 1, since the cast drum 3 is rotating counterclockwise, the film 2a discharged from the die comes into contact with the surface of the cast drum 3 on which dew has formed.
なお、本発明において、口金から吐出された膜が接触す
る位置より手前のキャストドラムにおける「手前」とは
、キャストドラムの回転方向と逆の方向に遡った位置を
指す。In the present invention, "this side" in the cast drum, which is in front of the position where the film discharged from the die comes into contact with, refers to a position traced back in the direction opposite to the rotational direction of the cast drum.
第３図は本発明（用いる湿り空気発生装置７、ノズル６
及びカバー５．の一実施態様を示すスケルトン図である
。本実施態様では、設定しようとする露点温度にスチー
ムで加熱した温水１２中に空気を導きバブリングで空気
に水分を付与し、ノズル６までに結露しないようにスチ
一ムで加熱された配管１５中を湿り空気を流し、ドラム
表面以外の湿り空気の接触部では結露しないように加熱
されたカバー５内に噴出する方法を例示した。第３図中
、１１は空気導入用配管、１２は温水、１３はスチーム
導入用配管、１４はスチーム排出用配管、１５は湿り空
気配管、１６はスチーム導入用配管、１７はスチーム導
入用配管である。本発明の実施により、冷却されたキャ
ストドラム表面に接触した湿り空気はキャストドラム表
面に凝縮結露し、均一でかつ薄い微小な水滴層を形成す
ることができる。これによって膜は均一に冷却でき、冷
却斑が発生し始めるキャスト速度限界が上がり、品質及
び製膜速度向上が大幅に改善される。Figure 3 shows the present invention (humid air generating device 7 used, nozzle 6
and cover5. FIG. 2 is a skeleton diagram showing one embodiment of the invention. In this embodiment, air is introduced into hot water 12 heated by steam to the dew point temperature to be set, and moisture is added to the air by bubbling. A method is exemplified in which humid air is flown through and the humid air is ejected into the heated cover 5 so that dew does not condense on contact areas other than the drum surface. In Fig. 3, 11 is a pipe for introducing air, 12 is a hot water pipe, 13 is a pipe for introducing steam, 14 is a pipe for discharging steam, 15 is a moist air pipe, 16 is a pipe for introducing steam, and 17 is a pipe for introducing steam. be. By implementing the present invention, moist air that has come into contact with the cooled casting drum surface can condense and form dew on the casting drum surface, forming a uniform and thin layer of minute water droplets. This allows the film to cool uniformly, raises the casting speed limit at which cooling spots begin to occur, and significantly improves quality and film formation speed.
微小水滴層の厚みは必要に応じ、湿り空気の露点を高め
ること、湿り空気の風量を増加することで厚く調整でき
る。湿り空気の露点はキャストドラムの表面温度（例え
ば１５〜４０℃）より高いことが必要であるが、例えば
６０〜８０℃である。The thickness of the minute water droplet layer can be adjusted as necessary by increasing the dew point of the humid air and increasing the air volume of the humid air. The dew point of the humid air needs to be higher than the surface temperature of the cast drum (for example, 15 to 40°C), and is, for example, 60 to 80°C.
また、湿り空気の風口は例えばキャストドラム幅６００
ｍｍにて５０〜５００ｆｆ／ｍｉｎである。また、水を
はじき易いキャストドラム表面に対しても結露という自
然現象を利用することにより十分に均一に微小な水滴層
を塗布することが可能となった。In addition, the humid air vent is, for example, cast drum width 600 mm.
It is 50 to 500 ff/min in mm. Furthermore, by utilizing the natural phenomenon of dew condensation, it has become possible to apply a layer of minute water droplets sufficiently evenly to the surface of the cast drum, which tends to repel water.
本発明は、キャストドラムの膜の接触しない範囲（固化
された膜がキャストドラムを離れる位置と口金から吐出
された廁がキャストドラムに接触する位置との間）に設
置することが特徴であり、そのアレンジメントの容易な
ことから、キャスト高速化のために過去開発された又は
将来開発される技術との複合が極めて容易であり、複合
効果が期待される。例えば、静電印荷方法との組合せ、
静圧ヂャンバーを設けこれに静圧を印荷する方法との組
合せ等がある。The present invention is characterized in that it is installed in a range where the film of the cast drum does not contact (between the position where the solidified film leaves the cast drum and the position where the liquid discharged from the mouthpiece contacts the cast drum), Since it is easy to arrange, it is extremely easy to combine it with technologies that have been developed in the past or will be developed in the future to speed up casting, and a combined effect is expected. For example, combination with electrostatic loading method,
There is a combination with a method of providing a static pressure damper and applying static pressure to it.
湿り空気の発生装置については、例示した実施態様の伯
に、空気と蒸気を混合する方法、空気と水を混合してこ
れを加熱する方法等があり、特に特別な技術ではなく、
どれを採用しても目的の効果は得られる。Regarding the humid air generating device, there are methods of mixing air and steam, methods of mixing air and water and heating the same, etc. in the illustrated embodiments, and it is not a particularly special technique.
No matter which one you use, you will get the desired effect.
また湿り空気の組成については、もつとも安価な空気を
媒体にしたが、必ずしも空気でなくともよく、適宜空気
以外の気体を混合してもよいし、不活性を必要とするも
のについては窒素（Ｎ２）でよいし、高い電気絶縁性を
必要とする場合にはフロンガス等を用いてもよい。Regarding the composition of humid air, we used air, which is naturally cheap, as a medium, but it does not necessarily have to be air, and gases other than air may be mixed as appropriate.For those that require inertness, nitrogen (N2 ), or if high electrical insulation is required, fluorocarbon gas or the like may be used.
第１図及び第２図の装置（キャストドラム幅６ＱＱｍｍ
、キャストドラム表面速度７０ｍ／分）を用い、空気導
入用配管７から１６３０．／ｍｉｎの流量で空気を導入
し、水温７０℃の温水１２の中をバブリングさせ、スチ
ームで加熱された配管１５中を通して、露点７０℃、温
度９０’Ｃの湿り空気とし、ノズル６からキャストドラ
ム３のクロムメツキされた表面（温度２３℃）に吹付け
た。The device shown in Figures 1 and 2 (cast drum width 6QQmm)
, cast drum surface speed of 70 m/min) from air introduction pipe 7 to 1630. Air is introduced at a flow rate of /min, bubbles through hot water 12 with a water temperature of 70°C, passes through piping 15 heated by steam, becomes humid air with a dew point of 70°C and a temperature of 90'C, and is passed through the nozzle 6 to the cast drum. No. 3 was sprayed onto the chromed surface (temperature 23° C.).
湿り空気の吹付けにより、キャストドラム３の表面は白
く曇ったようになり、きわめて細かな水滴が均一に付着
した。By blowing the moist air, the surface of the cast drum 3 became white and cloudy, and very fine water droplets were evenly adhered thereto.
上記の湿り空気の吹付けをしながら、ポリエチレンテレ
フタレートを製膜したところ、膜のキレストドラムへの
密着が向上し、冷却斑なしに製膜スピードを上げること
ができた。When polyethylene terephthalate was formed into a film while blowing the humid air as described above, the adhesion of the film to the crest drum was improved, and the film formation speed could be increased without cooling unevenness.
（発明の効果）
本発明により、キャストドラム表面に均一でかつ薄い微
小な水滴層を形成することができ、その結果、膜は均一
に冷却でき、冷却斑が発生し始めるキャスト速度限界が
上がり、品質面及び生産性が大幅に改善される。(Effects of the Invention) According to the present invention, it is possible to form a uniform and thin layer of minute water droplets on the surface of the casting drum, and as a result, the film can be cooled uniformly, and the casting speed limit at which cooling spots begin to occur is increased. Quality and productivity are greatly improved.
亀
第１図は本発明の一実施態様を示す製膜キャスト工程の
側面図、第２図はその斜視図、第３図は、本発明に用い
る湿り空気発生装置、ノズル及びカバーの一実施態様を
示すスケル１−ン図である。
１・・・口金 ２・・・膜３・・・キャス
トドラム ４・・・引離しローラ５・・・カバー
６・・・ノズル７・・・湿り空気発生装置Fig. 1 is a side view of the film forming and casting process showing one embodiment of the present invention, Fig. 2 is a perspective view thereof, and Fig. 3 is an embodiment of the humid air generating device, nozzle, and cover used in the present invention. FIG. 1... Mouthpiece 2... Membrane 3... Cast drum 4... Separation roller 5... Cover
6... Nozzle 7... Humid air generator
Claims (3)
ドラム表面に接触させ固化製膜する方法において、口金
から吐出された膜が接触する位置より手前のキャストド
ラム表面に、キャストドラムの表面温度よりも高い露点
及び該露点よりも高い温度を有する湿り空気を導き、該
キャストドラム表面に水を結露させ、水の結露したキャ
ストドラム表面に口金から吐出された膜を接触させるこ
とを特徴とする製膜方法。(1) In the method of solidifying and forming a film by discharging the molten raw material from a slit-shaped nozzle and bringing it into contact with the surface of a cast drum, the film is discharged from the nozzle and is placed on the surface of the cast drum in front of the point where the film comes into contact with the surface of the cast drum. The production method is characterized by introducing humid air having a high dew point and a temperature higher than the dew point, condensing water on the surface of the cast drum, and bringing a film discharged from the die into contact with the surface of the cast drum on which the water has condensed. Membrane method.
ドラム表面に接触させ固化製膜する装置において、キャ
ストドラム表面温度より高い露点を有する湿り空気を発
生する装置、湿り空気を噴き出すノズル、及び該ノズル
を包みかつキャストドラム表面に対面するカバーであっ
て、膜の全幅に相当する範囲を覆い、固化された膜がキ
ャストドラムを離れる位置と口金から吐出された膜がキ
ャストドラムに接触する位置との間に設けられたカバー
を具備することを特徴とする製膜装置。(2) A device that discharges a molten raw material from a slit-shaped mouthpiece and brings it into contact with the surface of a cast drum to solidify and form a film, which includes a device that generates humid air having a dew point higher than the surface temperature of the cast drum, a nozzle that blows out the humid air, and A cover that encloses the nozzle and faces the surface of the cast drum, covering an area equivalent to the entire width of the film, and defining a position where the solidified film leaves the cast drum and a position where the film discharged from the nozzle contacts the cast drum. A film forming apparatus characterized by comprising a cover provided between.
持したことを特徴とする特許請求の範囲第２項記載の製
膜装置。(3) The film forming apparatus according to claim 2, wherein the temperature of the inner surface of the cover is maintained higher than the dew point of humid air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62255559A JPH0197621A (en) | 1987-10-09 | 1987-10-09 | Film formation and its apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62255559A JPH0197621A (en) | 1987-10-09 | 1987-10-09 | Film formation and its apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0197621A true JPH0197621A (en) | 1989-04-17 |
Family
ID=17280405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62255559A Pending JPH0197621A (en) | 1987-10-09 | 1987-10-09 | Film formation and its apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0197621A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5544804A (en) * | 1978-09-26 | 1980-03-29 | Teijin Ltd | Preparation for polymer film |
| JPS62202719A (en) * | 1986-03-04 | 1987-09-07 | Teijin Ltd | Manufacture of thermoplastic polymer sheet |
-
1987
- 1987-10-09 JP JP62255559A patent/JPH0197621A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5544804A (en) * | 1978-09-26 | 1980-03-29 | Teijin Ltd | Preparation for polymer film |
| JPS62202719A (en) * | 1986-03-04 | 1987-09-07 | Teijin Ltd | Manufacture of thermoplastic polymer sheet |
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