JP2001129866A - Method and apparatus for cleaning film casting cooling roll - Google Patents
Method and apparatus for cleaning film casting cooling rollInfo
- Publication number
- JP2001129866A JP2001129866A JP31343299A JP31343299A JP2001129866A JP 2001129866 A JP2001129866 A JP 2001129866A JP 31343299 A JP31343299 A JP 31343299A JP 31343299 A JP31343299 A JP 31343299A JP 2001129866 A JP2001129866 A JP 2001129866A
- Authority
- JP
- Japan
- Prior art keywords
- cooling roll
- film
- sheet
- aggregate
- foreign matter
- 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
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は溶融ポリマーをフイ
ルムに成形する冷却ロールの清掃方法と装置に関し、更
に詳しくはフイルム状に押出された溶融ポリマーを、気
体の押圧で冷却ロールに密着させてフイルムを製造する
際に、該冷却ロールに付着する重合体の低分子量化合物
等を連続的に清掃除去し、もって良好な品質のフイルム
を長時間連続的に生産する方法および装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for cleaning a cooling roll for forming a molten polymer into a film, and more particularly, to a method in which a molten polymer extruded into a film is brought into close contact with a cooling roll by gas pressure. The present invention relates to a method and an apparatus for continuously cleaning and removing low-molecular-weight compounds of a polymer and the like adhering to a cooling roll during the production of the film, thereby producing a film of good quality continuously for a long time.
【０００２】[0002]
【従来の技術】薄いフイルムを高速でキャストする方法
として、溶融重合体をオリフィス状の口金からフイルム
状に押出し、気体の押圧によって冷却ロール面に密着さ
せ固化させるフイルムのキャスト方法が広く実施されて
いるが、フイルム状の重合体から昇華した低分子量化合
物が冷却ロール面に堆積する現象がある。気体の押圧を
高めると、押圧気流の一部が、口金から冷却ロールに至
る自由空間にある未固化のフイルム状物に衝突して振動
させ、厚みの均一性が悪化する。従って厚みの均一性が
重要なフイルムでは気体の押圧が比較的低いレベルでキ
ャストせざるを得ない。気体の押圧が低いとフイルムと
冷却ロールとの密着作用が弱いため、フイルムと冷却ロ
ールとの熱伝達作用が高くならない。その結果フイルム
の温度が徐々に冷却されて昇華作用が持続し、フイルム
と冷却ロールが近接して走行するため短時間に冷却ロー
ル面へ昇華物が堆積する。冷却ロール面に熱伝導性の低
い堆積層が出来ると、更にロールの冷却作用が低下して
昇華物の堆積が加速し、この堆積物がフイルムの表面に
転写したり、堆積物の一部が剥離してフイルムに付着し
て品質欠点になり易い。2. Description of the Related Art As a method of casting a thin film at a high speed, a method of casting a film in which a molten polymer is extruded into a film form from an orifice-shaped die, and is adhered to a cooling roll surface by gas pressure to be solidified. However, there is a phenomenon that a low molecular weight compound sublimated from a film-like polymer is deposited on a cooling roll surface. When the pressure of the gas is increased, a part of the pressurized air current collides with an unsolidified film-like material in a free space from the die to the cooling roll and vibrates, thereby deteriorating the uniformity of the thickness. Therefore, a film in which uniformity of thickness is important has to be cast at a relatively low level of gas pressure. When the pressure of the gas is low, the adhesive action between the film and the cooling roll is weak, so that the heat transfer action between the film and the cooling roll does not increase. As a result, the temperature of the film is gradually cooled, the sublimation action is maintained, and the sublimate accumulates on the cooling roll surface in a short time because the film and the cooling roll run close to each other. If a deposited layer with low thermal conductivity is formed on the surface of the cooling roll, the cooling effect of the roll is further reduced and the deposition of sublimate is accelerated, and this deposit is transferred to the film surface, or a part of the deposit is It easily peels off and adheres to the film, resulting in quality defects.
【０００３】従来からフイルムの生産を中断することな
くオンラインで冷却ロール面の堆積物を清掃する方法や
装置が提案されている。例えば、特公昭３９−２１１
２７号公報では冷却ロール面にあるフイルムをロールで
押圧する方法が提案されている。しかし、この方法では
堆積物をフイルムに転写させるため、フイルム表面に欠
点を生じる懸念がある。特公昭４７−３９１７号公報
では、冷却ロール面のフイルムの非接触部で常時ロール
面を水洗し乾燥する方法が提案されている。この方法で
は、装置が大掛りになる欠点がある。特公昭４８−４
４６５号公報では、堆積物を溶解する溶剤を用いて冷却
ロール面を洗浄し、溶剤を吸引除去する方法が提案され
ている。この方法も、やはり装置が大掛りにならざるを
得ない。特公昭５５−３６４９０号公報では、回転ブ
ラッシを冷却ロール面に押し当て、剥離した堆積物を吸
引除去する方法が提案されているが、この方法では剥離
物を完全に吸引除去することが難しい。特開昭５７−
５１４２６号公報に記載されている冷却ロール面をコロ
ナ処理する方法や、特公平３−６５７７５号公報に記
載されている冷却ロール面に紫外線を照射して堆積物を
分解除去する方法では、分解除去の処理速度が遅くて堆
積の進行に追いつかない場合があり、完全な洗浄が困難
な場合がある。Conventionally, a method and an apparatus for cleaning deposits on a cooling roll surface online without interrupting the production of a film have been proposed. For example, Japanese Patent Publication No. 39-211
No. 27 proposes a method of pressing a film on a cooling roll surface with a roll. However, in this method, since the deposit is transferred to the film, there is a concern that a defect may occur on the film surface. Japanese Patent Publication No. 47-3917 proposes a method in which the roll surface is always washed with water and dried at the non-contact portion of the film on the cooling roll surface. This method has a drawback that the apparatus becomes large. Tokiko 48-4
No. 465 proposes a method of cleaning a cooling roll surface using a solvent that dissolves deposits and removing the solvent by suction. This method also requires a large-scale apparatus. Japanese Patent Publication No. 55-36490 proposes a method in which a rotating brush is pressed against the surface of a cooling roll to remove the separated deposits by suction. However, it is difficult to completely remove the separated products by suction. JP-A-57-
In the method of corona treatment of the cooling roll surface described in Japanese Patent No. 51426, and the method of decomposing and removing deposits by irradiating ultraviolet rays to the cooling roll surface described in Japanese Examined Patent Publication No. 3-65775, Japanese Patent Application Laid-Open No. HEI 5-63175. May not be able to keep up with the progress of the deposition due to the slow processing speed, and it may be difficult to perform complete cleaning.
【０００４】[0004]
【発明が解決しようとする課題】しかるに気体の押圧に
よるキャスト法は、フイルムに付加した静電気のクーロ
ン力で密着させる静電密着法に比べて昇華物の堆積速度
が極めて速い、その原因は定かでないが、静電密着の場
合にはフイルムが急冷されるのに対して、気体の押圧の
場合にはフイルムは徐冷状態で、昇華物がフイルム内部
から表面に拡散する作用と、その表面からの昇華作用が
持続することにあると考えられる。従って昇華物の堆積
速度が速い気体押圧法にはコロナ処理法や紫外線照射法
は適用出来ない。However, in the casting method by pressing gas, the deposition rate of the sublimate is much faster than in the electrostatic adhesion method in which the film is adhered by the Coulomb force of the static electricity applied to the film, and the cause is not clear. However, in the case of electrostatic adhesion, the film is rapidly cooled, whereas in the case of gas pressure, the film is gradually cooled, and the sublimate diffuses from the inside of the film to the surface and the action from the surface. It is considered that the sublimation effect is maintained. Therefore, the corona treatment method or the ultraviolet irradiation method cannot be applied to the gas pressing method in which the deposition rate of the sublimate is high.
【０００５】本発明者は、上記の問題を解消し、設備が
大掛かりにならず、昇華物の堆積速度より早く且つ除去
作用の確実な方策を検討した結果、気体押圧法キャスト
で付着する昇華物の特徴として、冷却ロール面への付着
力が弱く、フエルト等の繊維の集合体でロール面を摩擦
することによって、容易に拭き取り除去出来ること、及
び繊維の集合体をフイルムが接触していないロール面の
上流と下流の２個所で摩擦することによって、昇華物の
剥離体を確実に除去出来ることを知見して本発明に到達
した。The inventor of the present invention has solved the above-mentioned problems and has studied a method of removing the sublimate more quickly than the deposition rate of the sublimate and ensuring the removal action without increasing the size of the equipment. As a feature, the adhesive force to the cooling roll surface is weak, and it can be easily wiped and removed by rubbing the roll surface with an aggregate of fibers such as felt, and a roll in which the film is not in contact with the aggregate of fibers. The present inventors have found out that the exfoliated substance of the sublimate can be reliably removed by rubbing at two points on the upstream and downstream sides of the surface.
【０００６】[0006]
【課題を解決するための手段】即ち本発明は、溶融重合
体をオリフィス状の口金からフイルム状に押出し、気体
の押圧によって冷却ロール面に密着させ固化させるフイ
ルムのキャスト方法において、フイルムと接触していな
い冷却ロール面に繊維のシート状集合体を接触させて、
ロールに付着した異物をシート状集合体に移す工程、次
いでシート状集合体の異物付着面から異物を吸引除去す
る工程、更に該シート状集合体の異物を吸引除去した面
を前記ロール面との接触位置より上流域の冷却ロール面
に再度接触させる工程からなり、該一連の工程を連続的
又は間欠的に実施することを特徴とするフイルムキャス
ト用冷却ロールの清掃方法である。That is, the present invention relates to a film casting method in which a molten polymer is extruded into a film from an orifice-shaped die, and is brought into close contact with a cooling roll surface by pressing gas to be solidified. Contact the fiber sheet aggregate to the cooling roll surface that is not
A step of transferring the foreign matter adhered to the roll to the sheet-like aggregate, a step of sucking and removing the foreign matter from the foreign matter-adhering surface of the sheet-like aggregate, and a step of sucking and removing the foreign matter of the sheet-like aggregate with the roll surface A method for cleaning a film-casting cooling roll, comprising a step of re-contacting a cooling roll surface in an upstream region from a contact position, wherein the series of steps is performed continuously or intermittently.
【０００７】また溶融重合体をオリフィス状の口金から
フイルム状に押出し、気体の押圧によって冷却ロール面
に密着させ固化させるフイルムのキャスト装置におい
て、フイルムと接触していない冷却ロール面に繊維のシ
ート状集合体を接触させて冷却ロール面に付着する異物
をシート状集合体に移す第一の手段、次いでシート状集
合体の異物付着面側から異物を吸引除去する第二の手
段、更に該シート状集合体の異物を吸引除去した面を、
第一の手段におけるシート状集合体と冷却ロール面との
接触位置より上流域の冷却ロール面に再度接触させる第
三の手段を有して、第三の手段で除去出来なかった異物
を除去する第一の手段からなり、第一の手段から第三の
手段を連続的又は間欠的に行う手段を備えたことを特徴
とするフイルムキャスト用冷却ロールの清掃装置であ
る。Further, in a film casting apparatus in which a molten polymer is extruded from an orifice-shaped die into a film form and is brought into close contact with a cooling roll surface by gas pressure and solidified, a sheet of fiber is formed on a cooling roll surface which is not in contact with the film. First means for contacting the aggregate to transfer foreign matter adhering to the cooling roll surface to the sheet-like aggregate, and second means for sucking and removing foreign matter from the foreign matter-adhering surface side of the sheet-like aggregate; The surface of the aggregate from which foreign matter has been removed by suction
A third means for re-contacting the cooling roll surface in the upstream region from the contact position between the sheet-shaped assembly and the cooling roll surface in the first means, and removes foreign matter that could not be removed by the third means. An apparatus for cleaning a cooling roll for film casting, comprising a first means and a means for performing the first to third means continuously or intermittently.
【０００８】[0008]
【発明の実施の形態】本発明では、口金から押出した溶
融重合体のフイルム状物を、気体の押圧によって冷却ロ
ール面にキャストする方法において、フイルムと接触し
ていない冷却ロール面に繊維のシート状集合体を接触さ
せて、ロールに付着する異物をシート状集合体に移し、
次いで該異物を付着面側から吸引除去し、前記ロール面
との接触位置より上流域に再度接触させて、該上流域で
除去できなかったロール面の異物を前記下流域で除去す
る工程からなり、剥離物を確実にしかも速やかに清掃出
来る方法である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of casting a film of a molten polymer extruded from a die onto a cooling roll surface by pressing gas, wherein a fiber sheet is formed on a cooling roll surface which is not in contact with the film. The foreign matter adhering to the roll is transferred to the sheet-like aggregate by contacting the
Then, the foreign matter is suction-removed from the adhering surface side, and brought into contact with the upstream area again from the contact position with the roll surface to remove foreign matter on the roll surface that could not be removed in the upstream area in the downstream area. This is a method that can surely and promptly clean the separated material.
【０００９】本発明において重合体とは、例えばポリエ
チレンテレフタレート、ポリエチレン−２，６−ナレフ
タレートのような芳香族ポリエステル、ポリプロピレン
のようなポリオレフイン、ポリスチレンのようなポリビ
ニル、ナイロンのようなポリアミド、ポリカーボネート
等の熱可塑性重合体であり、その中でも芳香族ポリエス
テルが特に好ましい。In the present invention, the polymer includes, for example, aromatic polyesters such as polyethylene terephthalate, polyethylene-2,6-naphthalate, polyolefins such as polypropylene, polyvinyls such as polystyrene, polyamides such as nylon, polycarbonates and the like. And aromatic polyesters are particularly preferred.
【００１０】本発明においてオリフィス状の口金とは、
例えばＴダイ、フィッシュテールダイ、Ｉダイ等で、直
線状の開口部を有する口金である。In the present invention, the orifice-shaped base is
For example, a die having a linear opening, such as a T-die, a fishtail die, an I-die, or the like.
【００１１】本発明における繊維のシート状集合体と
は、熱融着繊維等で部分的に接着された不織布や、短繊
維の集合体等で、例えば特開平９−２７２２９７号公
報、特開平１０−１３１０１８号公報、特開平１０−１
３１０２２号公報等で提案されている不織布や、短繊維
の集合体が好ましく、特に黒板や白板用のイレーザーの
材料や構成体が好都合である。In the present invention, the sheet-like aggregate of fibers is a nonwoven fabric or a short fiber aggregate partially adhered by heat-fused fibers, for example, as disclosed in JP-A-9-272297, JP-A-131018, JP-A-10-1
A nonwoven fabric and an aggregate of short fibers proposed in, for example, Japanese Patent No. 31022 are preferable, and a material or a structure of an eraser for blackboard or white board is particularly advantageous.
【００１２】以下、本発明を図をもって更に説明する。
図１は本発明の実施態様の一例で、図２は本発明の清掃
装置の部分拡大図である。図１において、１１は口金、
１２はフイルム状物、１３は冷却ロール、１４はエアー
チャンバー、１５は清掃装置、１６はシートの引取りロ
ールである。Hereinafter, the present invention will be further described with reference to the drawings.
FIG. 1 is an example of an embodiment of the present invention, and FIG. 2 is a partially enlarged view of the cleaning device of the present invention. In FIG. 1, 11 is a base,
12 is a film-like material, 13 is a cooling roll, 14 is an air chamber, 15 is a cleaning device, and 16 is a sheet take-up roll.
【００１３】図２において、５０は冷却ロール、５１は
繊維のシート状集合体、５２は繊維のシート状集合体を
ロール状にした巻出しロール、５３はその巻取りロー
ル、５４は異物のワイパー、５５はシート状集合体の支
持体で適度の弾性を有する繊維の集合体或はスポンジが
好適、５６はシート状集合体に拭き取られた異物を吸引
除去する筐体で、５７は筐体にシート状集合体が接触す
る部分でありパンチングプレート等の通気性の支持体が
好適であり、吸引作用が働く。In FIG. 2, reference numeral 50 denotes a cooling roll; 51, a sheet-like aggregate of fibers; 52, an unwinding roll in which the sheet-like aggregate of fibers is rolled; 53, a winding roll thereof; Reference numeral 55 denotes a support for the sheet-like aggregate, which is preferably an aggregate of fibers or sponge having appropriate elasticity. Reference numeral 56 denotes a housing for sucking and removing foreign substances wiped off by the sheet-like aggregate. Reference numeral 57 denotes a housing. The air-permeable support such as a punching plate is suitable for the portion where the sheet-shaped assembly comes into contact with the sheet-like assembly, and a suction function works.
【００１４】口金１１から押出された溶融重合体のフイ
ルム状物１２は冷却ロール１３に引取られ、エアーチャ
ンバー１４内部の気体の押圧で冷却ロールに押圧されて
固体フイルムになるが、気体の押圧作用は一般に余り強
くないので、フイルム状物の冷却ロールへの密着力は弱
く、従って熱伝達作用も低いのでフイルム状物は徐々に
冷却されて固化する。溶融フイルムが冷却ロールに近接
して走行し徐冷されるため、この間フイルム状物の内部
から昇華性の低分子化合物がフイルム表面に拡散して昇
華し、冷却ロール表面に凝固して低分子化合物の異物が
堆積する。異物が堆積した冷却ロールは本発明の清掃装
置１５を経てまた溶融フイルムがキャストされる。一方
固化したフイルムは引取りロール１６に引取られて次の
延伸工程や巻取り工程に至る。本発明の清掃装置は、ロ
ール状に巻かれた繊維のシート状集合体５１が巻出しロ
ール５２を離れて、一段目のワイパーの冷却ロール面側
の支持体５５の表面をロールの回転と反対方向に移動
し、ロール面を摩擦して異物を捕捉する。次いで該シー
トの異物捕捉面を吸引筐体５６の通気性の支持体面５７
に滑らせて該異物を吸引除去する。該シートは更に二段
目のワイパーに導かれて一段目のワイパーと同様にロー
ル面を摩擦して異物を捕捉し、該シートは巻き取りロー
ル５３に巻き取られる。これらの処理は連続的又は間欠
的に行うことができる。尚ワイパーは支持体を通気性材
料にして内面を減圧状態にし、捕捉異物が脱落しないよ
うにすることも出来る。The molten polymer film 12 extruded from the die 11 is taken up by the cooling roll 13 and pressed by the cooling roll by the gas inside the air chamber 14 to form a solid film. Is generally not very strong, the adhesion of the film to the cooling roll is weak, and the heat transfer effect is also low, so that the film is gradually cooled and solidified. Since the molten film runs close to the cooling roll and is gradually cooled, the sublimable low-molecular compound diffuses from the inside of the film into the film surface and sublimates, and solidifies on the cooling roll surface to form the low-molecular compound. Foreign matter accumulates. The cooling roll on which the foreign matter is deposited passes through the cleaning device 15 of the present invention, and the molten film is cast again. On the other hand, the solidified film is taken up by the take-up roll 16 and reaches the next stretching step and winding step. In the cleaning device of the present invention, the sheet-like aggregate 51 of the fiber wound in a roll shape leaves the unwinding roll 52 and causes the surface of the support 55 on the cooling roll surface side of the first-stage wiper to be opposed to the rotation of the roll. In the direction, and rubs the roll surface to catch foreign matter. Next, the foreign matter capturing surface of the sheet is connected to the air-permeable support surface 57 of the suction housing 56.
To remove the foreign matter by suction. The sheet is further guided by a second-stage wiper and rubs the roll surface to capture foreign matter in the same manner as the first-stage wiper, and the sheet is taken up by a take-up roll 53. These processes can be performed continuously or intermittently. The wiper may be made of a permeable material as a support, so that the inner surface is in a reduced pressure state so that trapped foreign substances do not fall off.
【００１５】冷却ロール面の堆積物の量はロール表面の
光沢度（ＪＩＳ Ｚ ８７４１に基づく６０°−６０°
光沢度）で測定出来る。昇華物が堆積する前の冷却ロー
ル面の光沢度と、堆積した後のロール表面の光沢度（一
般に低下）の差が堆積量と正の相関がある。本発明で用
いた光沢計は、日本電色工業製「デジタル携帯用光沢
計」ＶＧ−２Ｐ−Ｄ３で、クロムメッキをし鏡面研磨し
たロール表面の光沢度は通常５８〜６２である。以下本
発明を実施例を持って更に説明する。The amount of deposit on the cooling roll surface is determined by the glossiness of the roll surface (60 ° -60 ° according to JIS Z8741).
Gloss). The difference between the glossiness of the cooling roll surface before the sublimate is deposited and the glossiness (generally reduced) of the roll surface after deposition has a positive correlation with the deposition amount. The gloss meter used in the present invention is "Digital Portable Gloss Meter" VG-2P-D3 manufactured by Nippon Denshoku Industries Co., Ltd. The glossiness of the chrome-plated and mirror-polished roll surface is usually 58 to 62. Hereinafter, the present invention will be further described with reference to examples.
【００１６】[0016]
【実施例】［実施例１］図１の装置を用いて厚さ８０μ
ｍのポリエチレン−２，６−ナフタレートを押出し、エ
アーチャンバー内圧２００Ｐａで直径が７００ｍｍの冷
却ロール面に押圧して、フイルムの引取り速度６０ｍ／
分でキャストした。その間図２の清掃装置を作用させ
た、該清掃装置の繊維のシート状集合体は、熱融着繊維
で部分的に接着された厚さ２ｍｍの通気性不織布のシー
トで、冷却ロールに接触させて該ロールの回転とは逆方
向に１５０ｍｍ／時の速度で移動してロールに巻き取ら
れる。ワイパーの筐体は５ｋＮ／ｍ2の減圧で、シート
状集合体の支持体は厚さ１０ｍｍの通気性硬質スポンジ
である。異物を吸引除去する筐体はシート状集合体の支
持体がパンチングプレートで、筐体内は２０ｋＮ／ｍ2
の減圧である。冷却ロール表面の光沢度はフイルムをキ
ャスト前は５９、１０時間キャスト後は５３であった。
キャストフイルムの温度、或はフイルムの表面品質共キ
ャスト初期の状態と変化が無かった。[Embodiment 1] Using the apparatus shown in FIG.
m of polyethylene-2,6-naphthalate, and pressed against a 700 mm diameter cooling roll surface at an internal pressure of the air chamber of 200 Pa to take up a film at a speed of 60 m / m.
Cast in minutes. In the meantime, the cleaning device of FIG. 2 was actuated, and the sheet-like aggregate of fibers of the cleaning device was a sheet of a 2-mm-thick breathable nonwoven fabric partially adhered with heat-fused fibers, and was brought into contact with a cooling roll. The roller is moved at a speed of 150 mm / hour in a direction opposite to the rotation of the roll, and is wound on the roll. The housing of the wiper is at a reduced pressure of 5 kN / m 2 , and the support of the sheet-like assembly is a breathable hard sponge having a thickness of 10 mm. In the case of sucking and removing foreign substances, the support of the sheet-like assembly is a punching plate, and the inside of the case is 20 kN / m 2.
Is the reduced pressure. The glossiness of the cooling roll surface was 59 before casting the film and 53 after casting for 10 hours.
The temperature of the cast film or the surface quality of the film did not change from the initial state of the co-cast.
【００１７】［比較例１］清掃装置を作用させないこと
以外実施例１と同様の装置及び条件でポリエチレン−
２，６−ナフタレートを１０時間キャストした、冷却ロ
ール表面の平均光沢度は４に低下し、フイルム両端近傍
の厚肉部は急冷されないため結晶化を始め、ロール堆積
物の一部が剥離してフイルムの表面欠点の要因になっ
た。[Comparative Example 1] Polyethylene resin was used under the same conditions and conditions as in Example 1 except that the cleaning device was not used.
2,6-Naphthalate was cast for 10 hours, the average glossiness of the cooling roll surface was reduced to 4, and the thick portions near both ends of the film were not quenched, so crystallization started, and part of the roll deposit was peeled off. This was a cause of film surface defects.
【００１８】[0018]
【発明の効果】本発明は、気体の押圧によるフイルムの
キャスト方法では、冷却ロール面への重合体昇華物の堆
積速度は速いが、堆積物の密着力が小さいことに着目
し、簡易な装置で速やかに除去出来る方法及び装置であ
る。According to the present invention, in the method of casting a film by pressing gas, the deposition rate of the polymer sublimate on the cooling roll surface is high, but the adhesion of the deposit is small, and a simple apparatus is used. It is a method and an apparatus which can be promptly removed by the method.
【図１】本発明の実施態様の一例を示す説明図である。FIG. 1 is an explanatory diagram showing an example of an embodiment of the present invention.
【図２】本発明の清掃装置の部分拡大図である。FIG. 2 is a partially enlarged view of the cleaning device of the present invention.
１１．口金 １２．フイルム状物 １３．冷却ロール １４．エアーチャンバー １５．清掃装置 １６．シートの引取りロール ５０．冷却ロール ５１．繊維のシート状集合体 ５２．繊維のシート状集合体をロール状にした巻出しロ
ール ５３．巻取りロール ５４．ワイパー ５５．シート状集合体の支持体 ５６．異物を吸引除去する筐体 ５７．筐体にシート状集合体が接触する部分11. Base 12. Film-like material 13. Cooling roll 14. Air chamber 15. Cleaning device 16. Sheet take-up roll 50. Cooling roll 51. Fibrous sheet aggregate 52. Unwinding roll in which a sheet-like aggregate of fibers is formed into a roll 53. Take-up roll 54. Wiper 55. Support for sheet-shaped assembly 56. Housing for sucking and removing foreign matter 57. Part where the sheet-shaped assembly contacts the housing
Claims (3)
イルム状に押出し、気体の押圧によって冷却ロール面に
密着させ固化させるフイルムのキャスト方法において、
フイルムと接触していない冷却ロール面に繊維のシート
状集合体を接触させて、ロールに付着した異物をシート
状集合体に移す工程、次いでシート状集合体の異物付着
面から異物を吸引除去する工程、更に該シート状集合体
の異物を吸引除去した面を前記ロール面との接触位置よ
り上流域の冷却ロール面に再度接触させる工程からな
り、該一連の工程を連続的又は間欠的に実施することを
特徴とするフイルムキャスト用冷却ロールの清掃方法。1. A film casting method in which a molten polymer is extruded from an orifice-shaped die into a film, and is brought into close contact with a cooling roll surface by pressing gas to solidify the film.
A step of bringing a sheet-like aggregate of fibers into contact with a cooling roll surface that is not in contact with the film, and transferring foreign matter adhered to the roll to the sheet-like aggregate, and then suctioning and removing the foreign matter from the foreign matter-adhering surface of the sheet-like aggregate And a step of bringing the surface of the sheet-shaped assembly from which the foreign matter has been removed by suction again into contact with the cooling roll surface upstream of the contact position with the roll surface, and continuously or intermittently performing the series of processes. A method for cleaning a cooling roll for film casting.
載のフイルムキャスト用冷却ロールの清掃方法。2. The method for cleaning a cooling roll for film casting according to claim 1, wherein the polymer is polyester.
イルム状に押出し、気体の押圧によって冷却ロール面に
密着させ固化させるフイルムのキャスト装置において、
フイルムと接触していない冷却ロール面に繊維のシート
状集合体を接触させて冷却ロール面に付着する異物をシ
ート状集合体に移す第一の手段、次いでシート状集合体
の異物付着面側から異物を吸引除去する第二の手段、更
に該シート状集合体の異物を吸引除去した面を、第一の
手段におけるシート状集合体と冷却ロール面との接触位
置より上流域の冷却ロール面に再度接触させる第三の手
段を有して、第三の手段で除去出来なかった異物を除去
する第一の手段からなり、第一の手段から第三の手段を
連続的又は間欠的に行う手段を備えたことを特徴とする
フイルムキャスト用冷却ロールの清掃装置。3. A film casting apparatus in which a molten polymer is extruded from an orifice-shaped die into a film shape, and is brought into close contact with a cooling roll surface by pressing gas to solidify the film.
First means for contacting the sheet-like aggregate of fibers with the cooling roll surface that is not in contact with the film to transfer foreign matter adhering to the cooling roll surface to the sheet-like aggregate, and then from the foreign matter-adhering surface side of the sheet-like aggregate The second means for sucking and removing the foreign matter, and further, the surface of the sheet-like assembly from which the foreign matter is sucked and removed is placed on the cooling roll surface upstream of the contact position between the sheet-like assembly and the cooling roll surface in the first means. A third means for re-contacting, the first means for removing foreign matter that could not be removed by the third means, and a means for continuously or intermittently performing the third means from the first means A cleaning device for a cooling roll for film casting, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31343299A JP2001129866A (en) | 1999-11-04 | 1999-11-04 | Method and apparatus for cleaning film casting cooling roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31343299A JP2001129866A (en) | 1999-11-04 | 1999-11-04 | Method and apparatus for cleaning film casting cooling roll |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001129866A true JP2001129866A (en) | 2001-05-15 |
Family
ID=18041231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31343299A Pending JP2001129866A (en) | 1999-11-04 | 1999-11-04 | Method and apparatus for cleaning film casting cooling roll |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001129866A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008207474A (en) * | 2007-02-27 | 2008-09-11 | Toshiba Mach Co Ltd | Resin film molding apparatus and method of removing adhered matter in the apparatus |
| JP2013237170A (en) * | 2012-05-11 | 2013-11-28 | Baldwin Japan Ltd | Film molding apparatus |
| CN109732829A (en) * | 2019-01-30 | 2019-05-10 | 广东仕诚塑料机械有限公司 | A kind of film casting cleaning plant |
| CN114769216A (en) * | 2022-04-18 | 2022-07-22 | 江苏瑞澜特新材料有限公司 | Production equipment for water-soluble PVA film |
-
1999
- 1999-11-04 JP JP31343299A patent/JP2001129866A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008207474A (en) * | 2007-02-27 | 2008-09-11 | Toshiba Mach Co Ltd | Resin film molding apparatus and method of removing adhered matter in the apparatus |
| JP2013237170A (en) * | 2012-05-11 | 2013-11-28 | Baldwin Japan Ltd | Film molding apparatus |
| CN109732829A (en) * | 2019-01-30 | 2019-05-10 | 广东仕诚塑料机械有限公司 | A kind of film casting cleaning plant |
| CN109732829B (en) * | 2019-01-30 | 2024-05-17 | 广东仕诚塑料机械有限公司 | Film tape casting cleaning device |
| CN114769216A (en) * | 2022-04-18 | 2022-07-22 | 江苏瑞澜特新材料有限公司 | Production equipment for water-soluble PVA film |
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