JPS59196221A - Method for forming thermoplastic resin film - Google Patents
Method for forming thermoplastic resin filmInfo
- Publication number
- JPS59196221A JPS59196221A JP58070009A JP7000983A JPS59196221A JP S59196221 A JPS59196221 A JP S59196221A JP 58070009 A JP58070009 A JP 58070009A JP 7000983 A JP7000983 A JP 7000983A JP S59196221 A JPS59196221 A JP S59196221A
- Authority
- JP
- Japan
- Prior art keywords
- film
- cooling roll
- resin film
- extruded
- thermoplastic resin
- 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
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
- B29C48/915—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means
- B29C48/917—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means by applying pressurised gas to the surface of 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
-
- 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
- B29C48/915—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means
- B29C48/9165—Electrostatic pinning
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は熱可塑性樹脂フィルムの成形方法に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for forming a thermoplastic resin film.
溶融状態の熱可塑性樹脂をスリットを有する口金より押
出した後、静電印加法によって回転する冷却ロール上に
密着せしめ、冷却固化するフィルム成形方法はよく知ら
れている。また、各種熱可塑性樹脂のうち、ポリエチレ
ンテレフタレート樹脂のフィルム成形においては、静電
印加を用いる方法が、特に有効な手段であるため、よく
使われている。しかしながら、静電印加を用いて、冷却
ロールに溶融フィルムを密着する方法では、冷却ロール
とフィルムの間に気泡をかみ込み易いため。A well-known film forming method is to extrude a molten thermoplastic resin through a die having slits, then bring it into close contact with a rotating cooling roll by electrostatic application, and then cool and solidify the extruded thermoplastic resin. Further, among various thermoplastic resins, in film forming of polyethylene terephthalate resin, a method using electrostatic application is a particularly effective means and is therefore often used. However, in the method of bringing the molten film into close contact with the cooling roll using electrostatic application, air bubbles are likely to be trapped between the cooling roll and the film.
フィルムの成形速度は高くできない欠点があった。There was a drawback that the film forming speed could not be increased.
更に、フィルム片面へガスを吹きつける。いわゆる動圧
をかけながら静電印加を用いる方法(例えば特公昭53
−35587号公報)でも、フィルムの成形速度は、高
々40m/分であった。Furthermore, gas is blown onto one side of the film. A method that uses electrostatic force while applying so-called dynamic pressure (for example,
35587), the film forming speed was at most 40 m/min.
また、減圧状態で静電印加を用いる方法(例えば特開昭
56−67221号公報)も知られているが、冷却ロー
ルに放電し易い欠点があった。A method using electrostatic application under reduced pressure (for example, Japanese Patent Application Laid-open No. 56-67221) is also known, but this method has the disadvantage that discharge tends to occur on the cooling roll.
本発明の目的は、上記欠点を解消せしめ、気泡かみ込み
による気泡跡のない平面性の優れたフィルムを高速で成
形する方法を提供せんとするものである。SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks and to provide a method for forming a film with excellent flatness without any traces of air bubbles due to air bubble entrapment at high speed.
本発明は、上記目的を達成するために次の構成。 The present invention has the following configuration to achieve the above object.
即ち、?8融状態の熱可塑性樹脂をスリットを有する口
金よりフィルム状にして押出した後、静電卯の11法に
よって、冷却ロールに密着せしめ9冷却同化するフィル
ムの成形方法において、該溶融フィルムの両面の雰囲気
および静電印加電極の周囲の朴
本発明は、溶融状態の熱可塑性樹脂をスリット全有する
口金よシフイルム状にして、静電印加法によって冷却ロ
ールにそのフィルム状体を密着せしめ、冷却固化する周
知のフィルムの成形方法に適用することができる。In other words,? 8. In the method of forming a film in which a thermoplastic resin in a molten state is extruded into a film form through a nozzle with slits, and then brought into close contact with a cooling roll by the electrostatic method 9 and assimilated by cooling, both sides of the molten film are In the present invention, a thermoplastic resin in a molten state is made into a film shape with a cap having all slits, and the film-like body is brought into close contact with a cooling roll by an electrostatic application method, and then cooled and solidified. It can be applied to known film forming methods.
また1本発明の静電印加法は9周知の方法1例えば、浴
融樹脂フィルムの近傍で口金と平行に張られた金属′ワ
イヤー電極に直流および/または交流の高電圧を印加す
る方法や、あるいは冷却ロールと口金間に直流高電圧を
卯のUする方法(例えば。In addition, the electrostatic voltage application method of the present invention is a well-known method 1, for example, a method of applying a high voltage of DC and/or AC to a metal wire electrode stretched parallel to the base in the vicinity of the bath-melted resin film; Alternatively, a method of applying high DC voltage between the cooling roll and the cap (eg.
特公昭50−8743号公報)などにも用いることがで
きる。中でも金属ワーfヤー電極による静電印加法に本
発明方法を適用するのが最も好ましい。It can also be used in Japanese Patent Publication No. 50-8743). Among these, it is most preferable to apply the method of the present invention to an electrostatic application method using a metal wire electrode.
さて本発明は、溶融フィルムの両面と、静電印加電極の
周囲の雰囲気をゲージ圧で0.2 kg w 70m
”以上、好ましくは02〜10襠W / cm ’ 、
より奸才しくけ05〜5 ky w / C”の加圧状
態とするものである。この圧力範囲より小さい圧力では
1本発明の効果を得ることが難しい。また逆に、こ九よ
シ大きい圧力では口金からの溶融樹脂の押出しに1−ラ
ブルを生じたり、フィルムを冷却工程から取シ出す時に
トラブルを生じ易くなる。Now, in the present invention, the atmosphere on both sides of the molten film and around the electrostatic applying electrode is 0.2 kg w 70 m at a gauge pressure.
” or more, preferably 02 to 10 w/cm,
In order to be more skillful, the pressurized state is 05 to 5 kyw/C''.At a pressure lower than this pressure range, it is difficult to obtain the effects of the present invention. Pressure tends to cause trouble when extruding the molten resin from the die or when taking the film out of the cooling process.
なお、加圧状態は、溶融フィルムに対し、静圧がかかる
ことが方寸しく9例えばフィルムの片面のみをガス流を
吹きつける動圧では、フィルムがバタつき静電印加の電
流が変動して9気泡をかみ込み易いので方寸しくない。In addition, in the pressurized state, static pressure is often applied to the molten film9.For example, with dynamic pressure where a gas flow is sprayed on only one side of the film, the film flaps and the electrostatic applied current fluctuates9. It is not too bulky as it tends to trap air bubbles.
加圧状態を保つために用いるガスは、空気、窒素、炭酸
ガス、アルゴン、ヘリウム、フレオンガス、SF、、、
あるいは、これらの混合ガスが用いられるが、中でも空
気、窒素、フレオンガス、SF6 が方寸しい。さら
に好ましいのは、経済性。Gases used to maintain the pressurized state include air, nitrogen, carbon dioxide, argon, helium, Freon gas, SF, etc.
Alternatively, a mixture of these gases may be used, among which air, nitrogen, Freon gas, and SF6 are preferred. What's even more preferable is economic efficiency.
取扱い易さから空気、窒素である。またv ’n E印
加電極の周囲にカロ圧雰囲気と同種又は異種のガスを雰
囲気圧力を大きく乱さない程度に吹きつけてもよい。Air and nitrogen are used because of ease of handling. Further, a gas of the same kind or a different kind to the Calorie pressure atmosphere may be blown around the v 'n E applying electrode to the extent that the atmospheric pressure is not significantly disturbed.
加圧方法は、溶融フィルムの両面と、静電印加電極の周
囲をかこみ、とのかこんだ中を加圧状態にしてもよいし
、あるいは9口金から耐却ロールまで含むユニット全体
を密閉しうるようにして。Pressure can be applied by applying pressure to both sides of the molten film and surrounding the electrostatic charge applying electrode, or by sealing the entire unit including the 9 caps to the wear-resistant roll. Do it like that.
この中を加圧状態にしてもよい。The inside may be pressurized.
なお、溶融フィルムの両面とは、溶融フィルムが口金の
スリットから出て、冷却ロールに接触するまでのフィル
ムの両面のことである。Note that both sides of the molten film refer to both sides of the film from when the molten film comes out of the slit of the cap until it comes into contact with the cooling roll.
静電印加電極の周囲とは、金属ワイヤー電極を用いる場
合においては、電極と溶融フィルム、および電極と冷却
ロールにIdさまれた空間を少なくとも含む電極の周囲
の空間をいい、また冷却ロールと口金間に直流高電圧を
印加する場合においては、冷却ロールの全周の表面を含
む空間を言う。When a metal wire electrode is used, the area around the electrostatic charge applying electrode refers to the space around the electrode, including at least the space between the electrode and the molten film, and the space between the electrode and the cooling roll, and also between the cooling roll and the cap. In the case where a high DC voltage is applied between the cooling rolls, it refers to the space that includes the entire circumferential surface of the cooling roll.
次に本発明のフィルムの成形方法を図面に基づいて説明
する。Next, the method for forming the film of the present invention will be explained based on the drawings.
第1図は1本発明のフィルムの成形方法の一例を示した
装置の概略断面図である。FIG. 1 is a schematic sectional view of an apparatus showing an example of the film forming method of the present invention.
図において、1は溶融状態の熱可塑性樹脂が供給される
供給管、2は口金、6は加圧雰囲気、4は加圧室、5は
圧力計、6は冷却ロール、7は加圧口、8は引離しロー
ル、9は二ツブ回転ゴムロール、1Ωは溶融樹脂フィル
ム、11は冷却固化したフィルム、12は静電印加電極
である。図示したように、溶融樹脂フィルム10が2口
金2よシ押出された後、冷却ロール6上で冷却固化する
まで加圧雰囲気乙にさらされ、しかく)、静電印加電極
12も溶融樹脂フィルム10」二にあって、加圧雰囲気
ろにさらされている。In the figure, 1 is a supply pipe through which molten thermoplastic resin is supplied, 2 is a base, 6 is a pressurized atmosphere, 4 is a pressurization chamber, 5 is a pressure gauge, 6 is a cooling roll, 7 is a pressurization port, 8 is a separation roll, 9 is a two-tube rotating rubber roll, 1Ω is a molten resin film, 11 is a cooled and solidified film, and 12 is an electrostatic charge applying electrode. As shown in the figure, after the molten resin film 10 is extruded through the two nozzles 2, it is exposed to a pressurized atmosphere until it is cooled and solidified on the cooling roll 6. 2, exposed to a pressurized atmosphere.
一方、静電印加電極12には1図では省略された電源装
置から、下記式で示される程度の電圧Y(kV)が印加
される。On the other hand, a voltage Y (kV) of a level expressed by the following formula is applied to the electrostatic charge applying electrode 12 from a power supply device omitted in FIG.
V=aXP+b
ここでPけ雰囲気6の圧力をゲージ圧で表示した値で、
単位はlcgw/cm” である。本発明に好ましい印
加電圧Vの値は、aが5〜20.bが5〜30の範囲で
あり、より好ましくはaが6〜10.bが6〜20の範
囲である。印加電圧がこの範囲より小さいと溶融フィル
ムを冷却ロールに密着せし゛ める効果が得られにく
い。逆に、この範囲より大きいと異常放電をおこし易く
、フィルムに欠点を生じやすい。V=aXP+b Here, the pressure of Poke atmosphere 6 is expressed as gauge pressure,
The unit is lcgw/cm". Preferred values of the applied voltage V for the present invention are a range of 5 to 20, b of 5 to 30, more preferably a of 6 to 10, and b of 6 to 20. If the applied voltage is smaller than this range, it will be difficult to achieve the effect of bringing the molten film into close contact with the cooling roll.On the other hand, if it is larger than this range, abnormal discharge will easily occur and defects will occur in the film. .
印7JIl 7[圧の正負および電極の形状、設置する
位置や方向9電極の複数化および材質などは9%に限定
されるものではない。Mark 7 JIl 7 [The polarity of the pressure, the shape of the electrode, the position and direction of installation, the number of electrodes, the material, etc. are not limited to 9%.
本発明が適用し得る熱可塑性樹脂には、ポリエチレン、
ポリプロピレン、その共重合体、ポリスチレン、ポリ塩
化ビニル、ポリエステル、ポリアミド樹脂、フッ素樹脂
、ポリスルホン樹脂、ポリフェニレンサルファイド樹脂
などがあるが1本発明は、特に、ポリエステルの中でも
ポリエチレンテレフタレート樹脂やそれらの共重合樹脂
に適している。フィルムの厚みは特に限定しないが、1
0/J m〜5mmが好ましい。フィルムには不活性無
機粒子、紫外線吸収剤、染料、顔料、螢光増白剤、帯電
防止剤などを含んでもよい。Thermoplastic resins to which the present invention can be applied include polyethylene,
There are polypropylene, copolymers thereof, polystyrene, polyvinyl chloride, polyester, polyamide resins, fluororesins, polysulfone resins, polyphenylene sulfide resins, etc., but the present invention particularly focuses on polyethylene terephthalate resins and copolymer resins thereof among polyesters. suitable for The thickness of the film is not particularly limited, but 1
0/J m to 5 mm is preferable. The film may also contain inert inorganic particles, ultraviolet absorbers, dyes, pigments, fluorescent brighteners, antistatic agents, and the like.
加圧雰囲気の温度は特に限定されるものではないが、0
°C〜ろ50°Cの範囲がよく、さらに方寸しくは40
〜150“Cの範囲である。The temperature of the pressurized atmosphere is not particularly limited, but
A range of 50°C to 50°C is best, and more preferably 40°C.
~150"C.
捷だ、冷却ロール温度も特に限定されないが。However, the temperature of the cooling roll is not particularly limited.
−20°0〜150°Cの範囲が好ましい。A range of -20°0 to 150°C is preferred.
本発明の方法によれば9口金より押出された溶融樹脂フ
ィルムは冷却ロールに接触するまでの区間で9両面が平
衡状態の加圧雰囲気内を通シ1次に同じ加圧雰囲気内に
ある冷却ロール表面に静電印加で密着されることにより
、打電密着力が著しく向上し、冷却ロールの周速を大き
くしても空気のかみ込みは全くなく、そのためフィルム
成形の高速化が達成できる。According to the method of the present invention, the molten resin film extruded from 9 nozzles passes through a pressurized atmosphere with both sides in an equilibrium state in the section before contacting the cooling roll, and then is cooled in the same pressurized atmosphere. By being in close contact with the roll surface by electrostatic application, the adhesion force is significantly improved, and even if the circumferential speed of the cooling roll is increased, there is no entrapment of air at all, so that high-speed film forming can be achieved.
次に実施例に基づいて本発明の実施態様を説明する。Next, embodiments of the present invention will be described based on Examples.
実施例1〜7
極限粘度が0.65のポリエチレンテレフタレート樹脂
を押出機で290°Cに溶融し、第1図の装置を用いて
285 ’Oに保温した口金から、スリット幅1.0m
m、長さ400+nI++で押出した。続いて表面温L
65 ’aの直径800mmの冷却ロールに接触させ
、静電印加で密着し、固化したフィルムをニップ回転ゴ
ムロールから引取った。フィルムの厚さけ引取速度に関
係なく、常に150μmKなるように押出与を調整した
。Examples 1 to 7 A polyethylene terephthalate resin having an intrinsic viscosity of 0.65 was melted at 290°C using an extruder, and a slit width of 1.0 m was made from a nozzle kept at 285°C using the apparatus shown in Figure 1.
m, length 400+nI++. Next, the surface temperature L
The film was brought into contact with a 65'a cooling roll having a diameter of 800 mm, brought into close contact by electrostatic application, and the solidified film was taken off from the nip rotating rubber roll. The extrusion force was adjusted so that the extrusion force was always 150 μmK, regardless of the film thickness or take-up speed.
加圧のためのガスには15℃の空気を用いた。Air at 15° C. was used as the gas for pressurization.
その時の静電印加電極付近の雰囲気温度は85℃であっ
た。At that time, the ambient temperature near the electrostatic charge applying electrode was 85°C.
雰囲気圧力と静電印加電圧を変えて、その時の空気かみ
込みによるフィルム表面の気泡跡がない最高引取速度と
24時間中の異常放電の回数を求めた。第1表の実施例
4を除く、実施例1〜7に示したごとく、気泡跡が全く
なく、かつ異常放電もない状態で高速化が達成できた。By changing the atmospheric pressure and electrostatic applied voltage, the maximum take-up speed at which there were no traces of air bubbles on the film surface due to air entrainment and the number of abnormal discharges in 24 hours were determined. As shown in Examples 1 to 7, excluding Example 4 in Table 1, high speed was achieved with no traces of bubbles and no abnormal discharge.
実施例4は小さな異常放電が2回あった。In Example 4, there were two small abnormal discharges.
ここでいう異常放電回数は、異常放電時に瞬時に、かつ
過大に流れる電流があった回数を電流計から読み取った
ものである。The number of abnormal discharges referred to here is the number of times an excessive current flows instantaneously during abnormal discharges, which is read from an ammeter.
比較例1〜4
雰囲気圧力をO(即ち、大気圧)あるいはO,fkgW
/−に加圧した以外は実施例1〜7と同じ条件でフィル
ムの成形を行なった。第1表比較例1〜4に示したよう
に、低い引取速度しか達成できなかったし、あるいは、
引取速度を大きくできても異常放電が頻発した。Comparative Examples 1 to 4 Atmospheric pressure: O (i.e., atmospheric pressure) or O, fkgW
Films were formed under the same conditions as in Examples 1 to 7 except that the pressure was applied to /-. As shown in Comparative Examples 1 to 4 in Table 1, only a low take-up speed could be achieved, or
Even if the take-up speed could be increased, abnormal discharges occurred frequently.
実施例8〜10
上述の実施例および比較例で雰囲気ガスとして空気のか
わシに窒素を用いて、それ以外は同じ条件で気泡跡のな
い最高引取速度と異常放電回数全求めた。第1表実施例
8〜10に示すように異常放電もない状態で高速でフィ
ルムを引取ることができた。Examples 8 to 10 In the above-mentioned Examples and Comparative Examples, the maximum take-up speed without bubble traces and the total number of abnormal discharges were determined under the same conditions except that nitrogen was used as the atmospheric gas to replace the air. As shown in Examples 8 to 10 of Table 1, the film could be taken off at high speed without any abnormal discharge.
第 1 表Table 1
第1図は2本発明の成形”方法を適用した装置の概略断
面図である。
1:溶融樹脂供給管 2:口金
3:加圧雰囲気 4:加圧室
5:圧力計 6=冷却ロール7:加圧口
8:引離しロール9:ニップ回転ゴムロール
10:溶融樹脂フィルム
11:冷却固化したフィルム
12:静電印加電極
特許出願人 東 し 株 式 会 社手 続 補
正 書
特許庁長官 若 杉 和 夫殿
1、事件の表示
昭和58年特許願第 70009 号2、発明の名称
熱可塑性樹脂フィルムの成形方法
3、補正をする者
事件との関係 特許出願人
住 所 東京都中央区日本橋室町2丁目2番地4、補
正命令の日付 自発
5、補正により増加する発明の数 なし6・ 補正o
対象 明細書の「特許請求の範囲」および(1)
明細書 第1頁
特許請求の範囲を別紙の通り補正する。
(2) 同 第6頁2行目
「押出した後、静電」を「押出した後、該フィルム状体
を冷却ロールと冷却ロールに対向して設けられた電極と
の間に電圧を印加する静電」と補正する。
(3)同 第6頁16行目
「静電印加法は1周知の」を1静電印加法は。
冷却ロールと冷却ロールに対向して設けられた電極との
間に電圧を印加する周知の」と補正する。
(4) 同 第6頁16行〜20行目「方法や、ある
いは・・・・・・・・・・・・のが最も好ましい。」を
「方法などを用いることができる。」と補正する。
(5) 同 第4頁11行目
「かかることが好ましく」を「かかること、すなわち、
静電状態が好ましく」と補正する。
(6)同 第4頁14行目
「好ましくない。」を「好ましくない。上記の静圧状態
は、特に限定されるものではないが、製膜状態において
9口金と冷却ロールとの間の雰囲気の風速が0.5 m
/秒以下、好ましくは0.1m/秒以下の状態である
のが望ましい。」と補正する。
(7)同 第5頁15行〜17行目
「空間をいい、また・・・・・・・・・・・・を含む空
間を言う・。」を「空間を言う」と補正する。
(8)同 第9頁5行目
「押出量」を「押出量」と補正する。
く別紙〉
特許請求の範囲
溶融状態の熱可塑性樹脂をスリットを有する口金よシフ
イルム状にして押出した後、該溶融フイつて冷却ロール
に密着せしめ、冷却固化するフィルムの成形方法におい
て、該溶融フィルムの両面の雰囲気および静電印加電極
の周囲の雰囲気をゲージ圧で0.2kgw/am”以上
の加圧状態に保つことを特徴とする熱可塑性樹脂フィル
ムの成形方法。FIG. 1 is a schematic sectional view of an apparatus to which the molding method of the present invention is applied. 1: Molten resin supply pipe 2: Mouthpiece 3: Pressurized atmosphere 4: Pressurizing chamber 5: Pressure gauge 6 = Cooling roll 7 : Pressure port
8: Separation roll 9: Nip rotation rubber roll 10: Molten resin film 11: Cooled and solidified film 12: Electrostatic voltage application electrode Patent applicant Toshi Co., Ltd. Company Procedures Amendment Written by Kazuo Wakasugi, Commissioner of the Patent Office 1 , Indication of the case Patent Application No. 70009 of 1982 2 Name of the invention Method for molding thermoplastic resin film 3 Person making the amendment Relationship to the case Patent applicant address 2-2-4 Nihonbashi Muromachi, Chuo-ku, Tokyo , date of amendment order spontaneous 5, number of inventions increased by amendment None 6, amendment o
Target “Claims” of the specification and (1)
The claims on page 1 of the specification are amended as shown in the attached sheet. (2) ``After extrusion, electrostatic charge'' in the second line of page 6 of the same page is changed to ``After extrusion, a voltage is applied between the cooling roll and the electrode provided opposite to the cooling roll. Corrected as "static electricity." (3) On page 6, line 16, ``The electrostatic application method is well known''. This is a well-known method in which a voltage is applied between a cooling roll and an electrode provided opposite the cooling roll. (4) On page 6, lines 16 to 20 of the same page, amend "methods, or..." to "methods, etc. can be used." . (5) On page 4, line 11, “such is preferable” is replaced with “such, that is,
"An electrostatic state is preferable," he corrected. (6) "Unfavorable" on page 4, line 14 of the same document was changed to "unfavorable." The above static pressure state is not particularly limited, but the atmosphere between the 9 cap and the cooling roll in the film forming state is The wind speed is 0.5 m
It is desirable that the speed is below 0.1 m/sec, preferably below 0.1 m/sec. ” he corrected. (7) On page 5, lines 15 to 17, "refers to space, and refers to spaces that include..." is corrected to "refers to space." (8) "Extrusion amount" on page 9, line 5 is corrected to "extrusion amount". Attachment> Claims A method for forming a film in which a thermoplastic resin in a molten state is extruded into a film through a die having slits, and then the melt film is brought into close contact with a cooling roll to cool and solidify. 1. A method for forming a thermoplastic resin film, which comprises maintaining the atmosphere on both sides and the atmosphere around an electrostatic applying electrode at a pressure of 0.2 kgw/am'' or more in terms of gauge pressure.
Claims (1)
イルム状にして押出した後、静電印加法によって冷却ロ
ールに密着せしめ、冷却固化するフィルムの成形方法に
おいて、該溶融フィルムの両面の雰囲気および静電印加
電極の周囲の雰囲気をゲージ圧で0.2 Kgw/c+
n”以上の加圧状態に保つことを特徴とする熱可塑性樹
脂フィルムの成形方法。In a film forming method in which a thermoplastic resin in a molten state is extruded into a film through a die having slits, the resin is brought into close contact with a cooling roll by an electrostatic application method, and the film is cooled and solidified. The atmosphere around the electrode is 0.2 Kgw/c+ in gauge pressure.
A method for forming a thermoplastic resin film characterized by maintaining a pressurized state of n'' or more.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58070009A JPS59196221A (en) | 1983-04-22 | 1983-04-22 | Method for forming thermoplastic resin film |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58070009A JPS59196221A (en) | 1983-04-22 | 1983-04-22 | Method for forming thermoplastic resin film |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP58196089A Division JPS59196223A (en) | 1983-10-21 | 1983-10-21 | Method for forming thermoplastic resin film |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS59196221A true JPS59196221A (en) | 1984-11-07 |
Family
ID=13419169
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP58070009A Pending JPS59196221A (en) | 1983-04-22 | 1983-04-22 | Method for forming thermoplastic resin film |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59196221A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4769190A (en) * | 1986-04-25 | 1988-09-06 | Diafoil Company, Limited | Process for producing polyphenylene sulfide film |
-
1983
- 1983-04-22 JP JP58070009A patent/JPS59196221A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4769190A (en) * | 1986-04-25 | 1988-09-06 | Diafoil Company, Limited | Process for producing polyphenylene sulfide film |
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