JPS61219621A - Manufacture of thermoplastic resin film - Google Patents
Manufacture of thermoplastic resin filmInfo
- Publication number
- JPS61219621A JPS61219621A JP60059447A JP5944785A JPS61219621A JP S61219621 A JPS61219621 A JP S61219621A JP 60059447 A JP60059447 A JP 60059447A JP 5944785 A JP5944785 A JP 5944785A JP S61219621 A JPS61219621 A JP S61219621A
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- thermoplastic resin
- sheet
- roll
- film
- 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
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】
技術分野
本発明は熱可塑性樹脂フィルムの製造方法に関するもの
である。更に詳細には、溶融した熱可塑性樹脂を液体が
薄膜状に塗布された回転する冷却体表面上に押出して熱
可塑性樹脂よりなるフィルム又はシートを製造する方法
の改良に関するものであり、比較的薄い均質な重合体樹
脂シートを高度の生産性を伴って製造し得る改良技術に
関するものである。DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a method for producing a thermoplastic resin film. More specifically, the present invention relates to an improvement in the method for producing a film or sheet of thermoplastic resin by extruding a molten thermoplastic resin onto the surface of a rotating cooling body coated with a thin film of liquid. The present invention relates to an improved technique capable of producing homogeneous polymer resin sheets with high productivity.
従来技術
回転する冷却体表面（たとえばキャスティングドラム面
）に液体を薄く塗布して溶融重合体シートをキャスティ
ングする技術は公知である。BACKGROUND OF THE INVENTION Techniques for casting molten polymer sheets by applying a thin layer of liquid to a rotating cooling body surface (eg, casting drum surface) are known.
たとえば、冷却体表面に有機液体やオイル状物質を塗布
してシートを製造する方法として特公昭３５−１０５２
３号公報、特開昭４９−９９１６６号公報、Ｉ＃開昭５
０−５９４５７号公報、特開昭５０−７６１７３号公報
及び特開昭５２−１５５５６号会報が、また、水を塗布
する方法として特開昭５２−６５５６４号公報等の技術
が公知である。For example, as a method for manufacturing sheets by applying an organic liquid or oil-like substance to the surface of a cooling body,
Publication No. 3, Japanese Unexamined Patent Publication No. 49-99166, I# Kaisho 5
0-59457, JP-A-50-76173, and JP-A-52-15556, and techniques for applying water such as JP-A-52-65564 are known.
回転している冷却体表面に液体を薄く塗布して樹脂シー
トをキャスティングする方法では、シートと冷却体（液
体）とが接触を開始する位＃、（時点）で、シートと冷
却体表面の間に存在する液体がシートに随伴する空気を
排除するため、シート表面に形成し易い微小気泡の発生
がが抑えられ、結果的に生産速度を大＠に上げることが
できる。In the method of casting a resin sheet by applying a thin layer of liquid to the surface of a rotating cooling body, at the point where the sheet and the cooling body (liquid) begin to make contact, there is a gap between the sheet and the surface of the cooling body. Since the liquid present in the sheet eliminates the air accompanying the sheet, the generation of microbubbles that tend to form on the sheet surface is suppressed, and as a result, the production speed can be greatly increased.
更に、液体を塗布することによって回転する冷却体表面
は常時清浄に保持されるため、運転を中断して該表面を
洗浄する作業のｊ１１！１度を少なくできるなどの利点
もある。Furthermore, since the surface of the rotating cooling body is always kept clean by applying the liquid, there is an advantage that the number of times the operation is interrupted to clean the surface can be reduced.
しかしながら、これの従来技術は次のような欠点を有す
る。回転する冷却体表面に液体を薄膜状に塗布する場合
、溶融された熱可塑性樹脂が冷却体表面で冷却され固化
してゆく過程において液体が冷却体と樹脂とによって揮
散・脱落するかまたは吸湿、吸着あるいは拡散する。そ
して塗布竜はこの際の熱可塑性樹脂の中にとり込まれて
しまう液量と蒸発量の和とのバランス忙よって定められ
る。このよ５にして、冷却体表面に塗布される液体の薄
膜の厚みは約１０／ｊｍ以下となるようにフントロール
される。However, this prior art has the following drawbacks. When applying a thin film of liquid to the surface of a rotating cooling body, during the process in which the molten thermoplastic resin is cooled and solidified on the surface of the cooling body, the liquid volatilizes and falls off between the cooling body and the resin, or absorbs moisture. Adsorb or diffuse. The rate of application is determined by the balance between the amount of liquid taken into the thermoplastic resin and the amount of evaporation. In this manner, the thickness of the thin liquid film applied to the surface of the cooling body is approximately 10/jm or less.
液体を薄膜状に塗布する場合、ダイスリットより押出さ
れる樹脂シートの幅よりも少し広い幅、たとえばシート
縁部より外側に５〜２０蛎広くなるよ５に、液体を塗布
する必要がある。When applying the liquid in a thin film, it is necessary to apply the liquid to a width that is slightly wider than the width of the resin sheet extruded from the die slit, for example, 5 to 20 degrees wider than the edge of the sheet.
このような液膜厚み及び液膜の塗布幅によって熱可塑性
樹脂シートの成形が行なわれるが、樹脂シートが接触し
た冷却体表面からは液体が上記の過程により消費される
が、新しい液膜が塗布されるために常時均一な液膜が形
成される。The thermoplastic resin sheet is molded according to the thickness of the liquid film and the coating width of the liquid film.The liquid from the surface of the cooling body that the resin sheet comes into contact with is consumed through the above process, but a new liquid film is not applied. Because of this, a uniform liquid film is always formed.
しかるに、樹脂シートが接触しない部位であるシートの
両繰部の外側の冷却体面上に於いては、塗布された液体
は冷却体表面上に蓄積される結果となり、所定量を超え
て塗布されたときは冷却体表面“上を流下するようにな
る。また余剰に塗布された液体が、溶融押出しされた樹
脂から放出されるオリゴマーと混合して、冷却体表面上
でスラリー状となり冷却体表面を著しく汚染する弊害が
生じることがある。However, on the surface of the cooling body outside the recessed portion of the sheet, which is a part where the resin sheet does not come into contact, the applied liquid accumulates on the surface of the cooling body, and it is possible that the applied liquid exceeds the predetermined amount. When the liquid is applied, it starts to flow down on the surface of the cooling body.Additionally, the excess applied liquid mixes with the oligomers released from the melt-extruded resin, forming a slurry on the surface of the cooling body. Significant pollution may occur.
また、冷却体表面に余剰に付着した液体は、冷却体の表
面速度が高（なるに滲い、シートの締部の外側のみばか
りでなく縁部の中の方へも廻り込み、液体の薄膜の膜厚
を乱すためシート表面に欠点を生じさせることにもなる
。In addition, excess liquid adhering to the surface of the cooling element will be absorbed by the surface velocity of the cooling element at high speeds, and will flow not only to the outside of the tightening part of the sheet but also to the inside of the edge, resulting in a thin film of liquid. It also causes defects on the sheet surface because it disturbs the film thickness.
このように、冷却体表面に液体を塗布して、その上に溶
融熱可塑性樹脂シートを押出して冷却固化させてシート
を形成する方法は、なお未解決の問題がある。As described above, there are still unresolved problems with the method of forming a sheet by applying a liquid to the surface of a cooling body, extruding a molten thermoplastic resin sheet thereon, and cooling and solidifying the liquid.
発明の目的
本発明の目的は冷却体表面とシートとの関に空気巻込み
Ｋより生成する小気泡のない熱可塑性樹脂シートを製造
する新しい方法を提供するととＫある。OBJECTS OF THE INVENTION It is an object of the present invention to provide a new method for producing thermoplastic resin sheets free of small bubbles generated by air entrainment between the heat sink surface and the sheet.
本発明の他の目的は厚み約２５０μ以下の比較的薄い樹
脂シートを、運転時の操業率を高（維持しながら、高速
で製造し、更に引続いて二軸延伸することＫより、二軸
配向フィルムを高い生産条件下で製造しつる方法を提供
することにある。Another object of the present invention is to produce a relatively thin resin sheet with a thickness of about 250 μm or less at high speed while maintaining a high operating rate, and then to biaxially stretch it. The object of the present invention is to provide a method for manufacturing and hanging an oriented film under high production conditions.
本発明者は熱可塑性樹脂シートの製造方法を鋭意検討の
結果樹脂フィルムの接触していない外側部位の冷却体の
縁部に相当する位置において、余剰の液体を除去しつつ
、樹脂フィルムのキャスティング操作をすることによっ
て、上記の根な問題点が解消でき、効率的にフィルムを
生産し５るごとを見出し本発明に至ったものである。As a result of intensive studies on the method for manufacturing thermoplastic resin sheets, the inventor of the present invention has determined that the resin film is cast while removing excess liquid at a position corresponding to the edge of the cooling body at the outer part of the resin film that is not in contact with the resin film. By doing this, the fundamental problems mentioned above can be solved and the film can be produced efficiently.
即ち、本発明は、溶融した熱可塑性樹脂をフィルム状に
押出して押出し物となし、回転する冷却体面に塗布され
た液体の薄膜と押出し物とを接触せしめて冷却固化させ
る熱可塑性樹脂よりなるフィルムの契造忙於いて、前記
熱可塑性樹脂の押出し物が接触しない部位の前記液体の
薄膜を除去せしめることを特徴とする熱可塑性樹脂フィ
ルムの製造方法である。That is, the present invention provides a film made of a thermoplastic resin in which a molten thermoplastic resin is extruded into a film to form an extrudate, and the extrudate is cooled and solidified by bringing the extrudate into contact with a thin film of liquid applied to the surface of a rotating cooling body. This method of producing a thermoplastic resin film is characterized in that during the production process, a thin film of the liquid is removed from areas that are not in contact with the thermoplastic resin extrudate.
本発明において冷却体表面に存する余剰の液体を除去す
る手段は、実施例によって詳細に説明するものであるが
、次の実施態様を示し得る。In the present invention, the means for removing excess liquid existing on the surface of the cooling body will be explained in detail by way of examples, but the following embodiments may be shown.
回転冷却体表面に液体が塗布される位置と溶融熱可塑性
樹脂が冷却体に面に接触を開始する位置との間の場所に
液体除去手段を配置することが好ましい。Preferably, the liquid removal means is located at a location between the location where the liquid is applied to the rotary cooling body surface and the location where the molten thermoplastic starts contacting the surface of the cooling body.
余剰の液体を除去する手段としては回転冷却体表面に布
帛、ゴムまたはスポンジ製のロール等を接触させて払拭
するか又はしぼり取ること、エアージェットによって吸
引するか吹飛ばして除去することができる。余剰の液体
を除去する範囲は、冷却体にシート・フィルムが接触す
る縁部より内側へ１０〜２０■の区域として、シートの
縁部より外側の冷却ドラムの表面の全区域（接触しない
部位）／＋Ｌ好ましい。Excess liquid can be removed by bringing a fabric, rubber or sponge roll into contact with the surface of the rotary cooling body and wiping or squeezing it, or by suctioning or blowing it off with an air jet. The area to remove excess liquid is an area of 10 to 20 cm inward from the edge where the sheet/film contacts the cooling body, and the entire area of the surface of the cooling drum outside the edge of the sheet (the area that does not come into contact). /+L is preferred.
本発明が適用で會る熱可塑性樹脂としてはポリエチレン
、ポリプルピレンなどのポリオレフィン、ポリへキサメ
チレンアジパミドの如きポリアミド、及び次に述べるよ
うなポリエステル。Thermoplastic resins to which the present invention is applied include polyolefins such as polyethylene and polypropylene, polyamides such as polyhexamethylene adipamide, and polyesters as described below.
ポリカーボネートのホモポリマー、部分変性した共重合
体、ポリマーブレンド等が挙げられる。Examples include polycarbonate homopolymers, partially modified copolymers, and polymer blends.
そのポリエステルとしては、ポリエチレンテレフタレー
ト、ポリトリメチレンテレフタレート。The polyesters include polyethylene terephthalate and polytrimethylene terephthalate.
ポリテトラメチレンテレフタレート、ポリペンタメチレ
ンテレフタレート、ポリへキサメチレンテレフタレート
、ポリエチレン−２，６−ナフタレート、ポリテトラメ
チシン−２，６−ナフタレート、ポリへキサメチレン−
２，６−ナフタレート、ポリトリメチレン−２，６−ナ
フタレート。Polytetramethylene terephthalate, polypentamethylene terephthalate, polyhexamethylene terephthalate, polyethylene-2,6-naphthalate, polytetramethicine-2,6-naphthalate, polyhexamethylene-
2,6-naphthalate, polytrimethylene-2,6-naphthalate.
ポリペンタメチレン−２，６−ナフタレート、が挙げら
れる。またポリカーボネートとして４．４′−ジヒドロ
キシジフェニル−２，２−７’ロバンのポリカーボネー
ト等が好ましく用いられる。Polypentamethylene-2,6-naphthalate is mentioned. As the polycarbonate, 4,4'-dihydroxydiphenyl-2,2-7' loban polycarbonate and the like are preferably used.
次に、図面に参照して、本発明の実施態様にについて説
明する。第１図は本発明の実施態様の１例を示している
。ＰＡ１図において押出しダイ１１より押出された溶融
熱可塑性樹脂２０は一定速度で回転せしめられている回
転冷却体（冷却ドラム）１３０表面上忙押出される。一
方液体の端部はロール状の液体コーティング装置１４に
よって冷却ドラム１３０表面上に供給塗膜として形成さ
れ付着する。溶融状態の押出し物はこの液膜を介して密
着するように冷却ドラムの上に拡げられる。密着後冷却
ドラムの表面上で冷却固化せしめられた押出し物からな
る熱可塑性樹脂未延伸シート２１は引取ロール１５ＶＣ
よって冷却ドラムの表面より引堆られて次の延伸工程に
送られる。冷却ドラム面上で樹脂未延伸シートが接触し
ているよりも外側に付着している余剰の液体は自由に回
転するロール１６を冷却ドラム面上に押し当てることに
よって除去だれる。ロール１６の表面はゴム硬度２０度
乃至６０度の比較的軟らかいゴムをコーティングしたも
の又はスポンジ状の材料を被暮したものから構成されて
いる。ロール１６に付着した液体はスクイズロール１７
によってしぼり取られ樋から排出される。Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an example of an embodiment of the invention. In Figure PA1, the molten thermoplastic resin 20 extruded from the extrusion die 11 is actively extruded onto the surface of a rotary cooling body (cooling drum) 130 which is rotated at a constant speed. On the other hand, the end portion of the liquid is formed and adhered to the surface of the cooling drum 130 as a supplied coating film by the roll-shaped liquid coating device 14 . The molten extrudate is spread onto the cooling drum in close contact with the liquid film. The thermoplastic resin unstretched sheet 21 made of the extrudate is cooled and solidified on the surface of the cooling drum after being brought into close contact with the sheet 21, which is taken up by a take-up roll 15VC.
Therefore, it is pulled down from the surface of the cooling drum and sent to the next stretching process. Excess liquid adhering to the outside of the surface of the cooling drum with which the unstretched resin sheet is in contact is removed by pressing the freely rotating roll 16 onto the surface of the cooling drum. The surface of the roll 16 is coated with relatively soft rubber having a rubber hardness of 20 to 60 degrees or covered with a sponge-like material. The liquid attached to the roll 16 is squeezed into the squeeze roll 17.
is squeezed out and discharged from the gutter.
第２図及び第４図は本発明の別の実施態様を示している
。この場合余剰の液体は空気吹出口と吸引口とを防接し
て備えてなるエアーノズル２６（第３図参照）によって
冷却ドラム面に接触することなしに除去される。なお！
３図における矢印は空気の流れ方向を示すものである。2 and 4 show another embodiment of the invention. In this case, the excess liquid is removed by an air nozzle 26 (see FIG. 3), which has an air outlet and a suction port in shielded contact with each other, without coming into contact with the surface of the cooling drum. In addition!
The arrows in Figure 3 indicate the direction of air flow.
本発明はこのような実施態様に限定されることなく、そ
の目的、仕様に応じた種々の変更が可能である。たとえ
ばロールでしぼり取る方法１６やエアーノズル２６の代
りに布帛やプレード等でぶ＃府るなどの方法も用いるこ
とかで會る。The present invention is not limited to such embodiments, and various changes can be made depending on the purpose and specifications. For example, instead of the method 16 of squeezing with a roll or the air nozzle 26, a method of wrapping cloth, plaid, etc. may be used.
以下実施例により本発明を詳述する。The present invention will be explained in detail with reference to Examples below.
実施例１及び比較例１
極限粘守（０−りａロフェノールを溶媒として２５℃で
測定）が０．６５のポリ二＋レンテレフタレートを押出
機中で２９０１：に加熱溶融し、スリット巾１０００＋
ｍの押出しダイから押出し、表面一度２３℃のキャステ
ィングドラム（直径８００ ｔｐａ ）表面で急冷し、
厚さ３０１ｐｒｎ並びに２００μｍのフィルムとして引
取速度を５０ｍ／−として引取った。この際第１図に示
した方法によりキャスティングした。キャスティングに
おいては液体として水を塗布した。また、補助手段とし
て特公昭３７−６１４２号公報に記載されている静電密
着法も併用した。このようにして１４日間連続運転した
が未延伸シートは常時均一透明で端部への水滴の例り込
みなどによる表面の欠点は全（見られなかった。また冷
却ドラムの表面は全面に渉って常時に清浄に保たれ、運
転を中断して洗浄するなどの必萼は全くなかった。Example 1 and Comparative Example 1 Polydi+lene terephthalate having an ultimate viscosity (measured at 25°C using 0-ria lophenol as a solvent) of 0.65 was heated and melted to 2901: in an extruder, and a slit width of 1000+
It was extruded from an extrusion die of 1.0 m, and then quenched on the surface of a casting drum (diameter 800 tpa) at 23°C.
A film having a thickness of 301 prn and 200 μm was taken at a taking speed of 50 m/-. At this time, casting was carried out by the method shown in FIG. In casting, water was applied as a liquid. Further, as an auxiliary means, an electrostatic adhesion method described in Japanese Patent Publication No. 37-6142 was also used. After continuous operation for 14 days in this manner, the unstretched sheet was always uniformly transparent and no surface defects such as water droplets trapped at the edges were observed.Also, the surface of the cooling drum was completely covered. The calyx was kept clean at all times, and there was no need to interrupt operation to clean it.
一方、本発明の手段を実施しない場合には運転開始より
３日％ＩＣは冷却ドラム面のシートが接触していない部
分で、余剰の水と＠（社）ポリマーから放出さねたオリ
ゴマーが混合し、スラリー状となって堆積した。それが
塗布された薄い水膜のシートの端部に相当する部分を汚
染するため特にシートの両端部の密輸が不良となり実高
の巾の歩留りを低下させるというトラブルを発生した。On the other hand, if the measures of the present invention are not carried out, 3 days after the start of operation, the excess water and the oligomers not released from the polymer will mix on the part of the cooling drum surface that is not in contact with the sheet. It formed a slurry and was deposited. Since it contaminates the thin water film on which it is applied, which corresponds to the edge of the sheet, problems occur in that the smuggling at both ends of the sheet becomes defective, which lowers the yield across the width of the actual sheet.
実施例２及び比較例２
＠４図に示した方法により厚さ１０００／ｊｍのシート
を３０７Ｆ！ ／ ｍで引取った。この除用いた樹脂及
び溶融押出し条件は実施例ＩＫ示したものと同一にした
。キャスティングドラムは直径１５００＋ｗｍＯものを
用い、嵌面湛度は２５℃に保持した。キャスティングド
ラム面忙形成される液膜としては水を用いた。水を液体
槽３１から樋状の加熱体３０に導き加熱して水蒸気を発
生させた。水蒸気は溶融樹脂シート２０、スリットダイ
１１の下面、及び冷却ドラム面１３とで囲まれた空間に
発生するが、冷却ドラム面が冷却されているためにこの
面に凝縮して水の薄い膜が形成される。水の薄い膜の厚
みは水の蒸９量をコントロールすることによって一定に
保たれる。Example 2 and Comparative Example 2 @4 A sheet with a thickness of 1000/jm was made into 307F! by the method shown in Figure 4! / I picked it up at m. The resin used and melt extrusion conditions were the same as those shown in Example IK. A casting drum with a diameter of 1500+wmO was used, and the surface permeability was maintained at 25°C. Water was used as the liquid film formed on the surface of the casting drum. Water was introduced from the liquid tank 31 to the gutter-shaped heating element 30 and heated to generate water vapor. Water vapor is generated in a space surrounded by the molten resin sheet 20, the lower surface of the slit die 11, and the cooling drum surface 13, but since the cooling drum surface is cooled, it condenses on this surface and forms a thin film of water. It is formed. The thickness of the thin water film is kept constant by controlling the amount of water evaporation.
シートが接触していない部分の締部の余剰の水分はエア
ーノズル２６によって除去した。この際エアーノズル２
６の吹出口から空気を３０ｍ／秒で吹出し隣接する吸引
口より吸引しつつ冷却ドラム表面とノズル先端との間隔
をｈα保持した。Excess moisture in the tightened portion where the sheet was not in contact was removed by an air nozzle 26. At this time, air nozzle 2
Air was blown out from the air outlet No. 6 at a rate of 30 m/sec and sucked through the adjacent suction port, while maintaining the distance hα between the cooling drum surface and the nozzle tip.
このような方法で１週間運転したが未延伸シートは極め
て均一透明であり、表面の欠点は全く見られなかった。After operating in this manner for one week, the unstretched sheet was extremely uniform and transparent, and no surface defects were observed.
本発明方法を実施しなかった場合は実施例１で示したよ
うなトラブルを短時間で発生した。When the method of the present invention was not carried out, troubles like those shown in Example 1 occurred in a short period of time.
第１図、第２図及び第４図は本発明の製造方法を示す工
８概略図である。また、第３図は２６で示されるエアー
ノズルの構造概略図である。図面において、１１はダイ
、１３は冷却ロール（冷却ドラム）、１４は冷却−−ル
に液体の薄膜を塗布するコーター、１５は引取ロール、
１６は余−！の液体を除去するためのローラー、１７は
１６のｐ−ラーに付いた液体をしぼり取るための排液装
置、２６はエアーノズル、３０は蒸気供給用の樋で加熱
装置を包含している。
３１は液体の供給槽、２０は溶融樹脂のシート、２１は
冷却固化された樹脂シートである。FIGS. 1, 2, and 4 are schematic diagrams showing the manufacturing method of the present invention. Further, FIG. 3 is a structural schematic diagram of an air nozzle indicated by 26. In the drawing, 11 is a die, 13 is a cooling roll (cooling drum), 14 is a coater that applies a thin film of liquid to the cooling roll, 15 is a take-up roll,
16 is extra! 17 is a draining device for squeezing out the liquid attached to the p-roller 16, 26 is an air nozzle, and 30 is a gutter for supplying steam, which includes a heating device. 31 is a liquid supply tank, 20 is a molten resin sheet, and 21 is a cooled and solidified resin sheet.
Claims (1)
となし、該押出し物を回転する冷却体表面に塗布された
液体の薄膜と接触せしめて冷却固化させる熱可塑性樹脂
よりなるフィルムの製造において、前記熱可塑性樹脂の
前記押出し物と接触しない部位の前記液体の薄膜を除去
せしめることを特徴とする熱可塑性樹脂フィルムの製造
方法。In the production of a film made of a thermoplastic resin, a molten thermoplastic resin is extruded into a film to form an extrudate, and the extrudate is cooled and solidified by contacting the extrudate with a thin film of liquid applied to the surface of a rotating cooling body. A method for producing a thermoplastic resin film, comprising removing a thin film of the liquid from a portion of the thermoplastic resin that does not come into contact with the extrudate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60059447A JPS61219621A (en) | 1985-03-26 | 1985-03-26 | Manufacture of thermoplastic resin film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60059447A JPS61219621A (en) | 1985-03-26 | 1985-03-26 | Manufacture of thermoplastic resin film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61219621A true JPS61219621A (en) | 1986-09-30 |
| JPH0354613B2 JPH0354613B2 (en) | 1991-08-20 |
Family
ID=13113545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60059447A Granted JPS61219621A (en) | 1985-03-26 | 1985-03-26 | Manufacture of thermoplastic resin film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61219621A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0466921A1 (en) * | 1988-06-23 | 1992-01-22 | Toray Industries, Inc. | Process for producing polyester film |
| KR100770345B1 (en) | 2006-12-27 | 2007-10-25 | 주식회사 포스코 | Device for removing scattering solution in the insulation coating unit |
| KR100770346B1 (en) | 2006-12-26 | 2007-10-25 | 주식회사 포스코 | Apparatus for preventing coating defect of coating unit |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60131221A (en) * | 1983-12-20 | 1985-07-12 | Toray Ind Inc | Cooling solidifying device for discharged polymer |
-
1985
- 1985-03-26 JP JP60059447A patent/JPS61219621A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60131221A (en) * | 1983-12-20 | 1985-07-12 | Toray Ind Inc | Cooling solidifying device for discharged polymer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0466921A1 (en) * | 1988-06-23 | 1992-01-22 | Toray Industries, Inc. | Process for producing polyester film |
| KR100770346B1 (en) | 2006-12-26 | 2007-10-25 | 주식회사 포스코 | Apparatus for preventing coating defect of coating unit |
| KR100770345B1 (en) | 2006-12-27 | 2007-10-25 | 주식회사 포스코 | Device for removing scattering solution in the insulation coating unit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0354613B2 (en) | 1991-08-20 |
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| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |