JPS59169815A - Manufacture of thermoplastic polymer sheet - Google Patents
Manufacture of thermoplastic polymer sheetInfo
- Publication number
- JPS59169815A JPS59169815A JP58042323A JP4232383A JPS59169815A JP S59169815 A JPS59169815 A JP S59169815A JP 58042323 A JP58042323 A JP 58042323A JP 4232383 A JP4232383 A JP 4232383A JP S59169815 A JPS59169815 A JP S59169815A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- cooling body
- cooling
- roller
- polymer sheet
- 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
-
- 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)
- Moulding By Coating Moulds (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、熱可塑性重合体シートの製造方法に関するも
ので、さらに詳しくは熱可塑性重合体を移動冷却体表面
へシート状に押出し急冷成型する熱可塑性重合体シート
の製造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 producing a thermoplastic polymer sheet, and more specifically, a thermoplastic polymer sheet is extruded onto the surface of a moving cooling body and rapidly cooled and molded. The present invention relates to a method for producing a plastic polymer sheet.
従来の熱可塑性重合体シートの製造方法とじては、（１
）電気的に接地された冷却ローラー上面上に高電圧に帯
電させた電極部材を設け、シート上面に静電気を印加し
、該シートの冷却ロールへの密着作用を得る方法（以下
、従来例−１と云う）。The conventional method for producing thermoplastic polymer sheets includes (1)
) A method in which an electrode member charged with a high voltage is provided on the top surface of the cooling roller that is electrically grounded, and static electricity is applied to the top surface of the sheet to obtain an adhesion effect of the sheet to the cooling roll (hereinafter, conventional example-1) ).
（２）冷却ローラー自体を高電圧に帯電させ、密着作用
を得る方法（以下、従来例−２と云う）、などが知られ
ている。(2) A method of obtaining an adhesion effect by charging the cooling roller itself to a high voltage (hereinafter referred to as conventional example 2) is known.
しかしながら、従来法いずれの場合も、冷却ロールの速
度を上昇させ重合体シートを効率よく製造しようとする
と、該シートと冷却ロールの間に空気の巻き込みが起こ
り２重合体シートの表面状態の悪化が起きる。従来例−
１の方法では、この上限速度は４０〜５０ｍ／分である
。また、従来例−１の方法には、電極の寿命、電極切れ
２等によるトラブル、さらに、シートを介して電極があ
るため、シートに欠陥があると、電極よりローラーに放
電し、ローラー表面を破損するトラブルも起こるため、
操業上程々の問題がある。また、従来例−２では、前述
のような問題は々いが、上限速度が２本発明者らの検討
によれば、２５〜３０ｍ７分であり、従来例−１よりも
かなり劣っている。However, in both conventional methods, when attempting to efficiently produce a polymer sheet by increasing the speed of the cooling roll, air is trapped between the sheet and the cooling roll, resulting in deterioration of the surface condition of the bipolymer sheet. get up. Conventional example -
In method 1, this upper speed limit is 40 to 50 m/min. In addition, in the method of Conventional Example 1, there are problems such as the lifespan of the electrode and electrode breakage2, etc.Furthermore, since the electrode is placed through the sheet, if there is a defect in the sheet, electrical discharge will occur from the electrode to the roller, and the roller surface will be damaged. Because troubles such as damage may occur,
There are some operational problems. Furthermore, in Conventional Example-2, although there are many problems as mentioned above, the upper limit speed is 25 to 30 m7 minutes, according to the study by the present inventors, which is considerably inferior to Conventional Example-1.
そこで２本発明らは、前述の問題点がなく、なおかつ上
限速度が高い方法を見出すべく検討を行なったところ、
従来例−２の方法での速度の上限において以下の問題点
のあることが判明した。Therefore, the present inventors conducted studies to find a method that does not have the above-mentioned problems and has a high upper limit speed.
It has been found that the method of Conventional Example 2 has the following problems in the upper speed limit.
（１） 冷却ローラー表面とローラーに接触する直前
の重合体シート間に微小な放電が発生し。(1) A minute electrical discharge occurs between the cooling roller surface and the polymer sheet just before it comes into contact with the roller.
その結果静電的な密着力が低下する。As a result, electrostatic adhesion is reduced.
（２） さらに電圧を上げると、ローラーからシート
が押出される口金への火花放電が起こり。(2) When the voltage is further increased, a spark discharge occurs from the roller to the die from which the sheet is extruded.
著しい密着力の低下およびローラー表面の破損をひき起
こす。This causes a significant decrease in adhesion and damage to the roller surface.
しだがって従来例−２の方法では、高速で十分な密着力
が得られるまで電圧が上げられず、速度の上限が低いと
ころに留まっているという問題点があった。Therefore, the method of Conventional Example 2 has the problem that the voltage cannot be increased until sufficient adhesion is obtained at high speed, and the upper limit of the speed remains at a low level.
本発明の目的は、」二記従来例の問題点を解消し。 The object of the present invention is to solve the problems of the prior art described in 2.
重合体シートが高速で安定して製造できる方法を提供せ
んとするものである。The purpose of this invention is to provide a method by which polymer sheets can be produced stably at high speed.
上記の目的を達成するだめ２本発明は次の構成からなる
。すなわち、融解した熱可塑性重合体を口金からシート
状にして移動冷却体上へ押出し。In order to achieve the above object, the present invention consists of the following configuration. That is, the molten thermoplastic polymer is extruded from a die into a sheet onto a moving cooling body.
該移動冷却体表面を高電位に保って静電的に密着固化せ
しめる重合体シートの製造方法において。In a method for manufacturing a polymer sheet, the surface of the moving cooling body is kept at a high potential and electrostatically adhered and solidified.
該重合体シートの移動冷却体との接触点近傍を。near the point of contact of the polymer sheet with the moving cooling body.
空気より電気絶縁性の高いガスの雰囲気に保つことを特
徴とする熱可塑性重合体シートの製造方法である。This is a method for producing a thermoplastic polymer sheet, which is characterized by maintaining a gas atmosphere with higher electrical insulation than air.
本発明における熱可塑性重合体とは、ポリエチレン、ポ
リプロピレン等のポリオレフィン類、ポリエステル類、
ポリアミド類、ポリイミド類、ポリスチレン類、ポリビ
ニル類等のシートとして成型され得る周知の重合体およ
びこれらの共重合体。Thermoplastic polymers in the present invention include polyolefins such as polyethylene and polypropylene, polyesters,
Well-known polymers that can be molded into sheets, such as polyamides, polyimides, polystyrenes, polyvinyls, and copolymers thereof.
混合体であって、他の添加剤などが含有されたものであ
ってもよい。また９口金から押出された溶融シートは、
単層でも多層に積層されたものであってもよい。It may also be a mixture containing other additives. In addition, the molten sheet extruded from 9 nozzles is
It may be a single layer or a multilayer structure.
移動冷却体とは、冷却ローラー、冷却ベルトなどで、こ
れらの複合体も含まれる。まだ、冷却ローラー、冷却ベ
ルトなどの表面に他の層が被覆されている場合はこれも
含まれるものとする。The moving cooling body refers to cooling rollers, cooling belts, etc., and also includes composites thereof. If the surface of the cooling roller, cooling belt, etc. is coated with another layer, this is also included.
なお、移動冷却体を絶縁する方法には、移動冷却体その
ものをアースに対し絶縁する方法のほか。In addition, methods for insulating a mobile cooling body include insulating the mobile cooling body itself from ground.
移動冷却体を絶縁層を介して導電層で被覆し、その導電
層をアースに対して絶縁する方法も含まれるものとし、
後者の場合、電圧の印加される部分としての移動急冷体
は、その導電層を指すものとする。また、導電層は金属
からなる層や半導体からなる層であってもよく、その層
の上に、さらに絶縁層が被覆されていてもよい。It also includes a method of covering a mobile cooling body with a conductive layer via an insulating layer and insulating the conductive layer from earth,
In the latter case, the moving quenching body as the part to which the voltage is applied shall refer to its electrically conductive layer. Furthermore, the conductive layer may be a layer made of metal or a layer made of semiconductor, and the layer may be further covered with an insulating layer.
移動冷却体表面を高電位に保つための印加する電圧は、
交流、直流のいずれでもよいが、望ましくは電圧変動率
１％以下の直流（負）が好ましい。The voltage applied to keep the surface of the moving cooling body at a high potential is:
Either alternating current or direct current may be used, but direct current (negative) with a voltage fluctuation rate of 1% or less is preferable.
重合体シートの移動冷却体との接触点近傍とは。What is the vicinity of the point of contact between the polymer sheet and the moving cooling body?
溶融押出しされたシートが移動冷却体に接する点で、か
つその接する面側の近傍である。This is the point where the melt-extruded sheet contacts the moving cooling body and near the contact surface side.
該重合体シートの冷却体との接触点近傍は、空５−
気より絶縁性の高いガス、好捷しくけ、標準空気の１６
倍以上の絶縁性を有するガス雰囲気に保つ。The vicinity of the point of contact of the polymer sheet with the cooling body is heated by a gas having a higher insulating property than air, such as 5-16% of standard air.
Maintain in a gas atmosphere with more than twice the insulation properties.
ここでいう絶縁性とは、ＡＳＴＭ Ｄ２４７７に述べ
られる方法により、誘電破壊電圧で定義する。Insulation here is defined by dielectric breakdown voltage according to the method described in ASTM D2477.
この条件を満足する代表的なガスは、六フッ化硫黄、お
よび多くのハロカーボン類が含捷れる。Typical gases that satisfy this condition include sulfur hexafluoride and many halocarbons.
ガス雰囲気を保つには、（１）接触点近傍を全てカバー
で覆い、外気と遮断し、ガスにより雰囲気を置換する。To maintain a gas atmosphere, (1) cover the entire area near the contact point to isolate it from the outside air, and replace the atmosphere with gas.
（２）第１図のように接触点近傍にノズル状のものより
ガス流を連続的に供給する。など。(2) As shown in Figure 1, a gas flow is continuously supplied from a nozzle-shaped device near the contact point. Such.
いずれの方法によっても達成することができる。This can be achieved by any method.
次に２図面に基づいて本発明を説明するが、これらに限
定されるものではない。第１図は２本発明の熱可塑性重
合体シートの製造方法に使用する装置の概略図を示すも
のである。第１図において。Next, the present invention will be explained based on two drawings, but the present invention is not limited thereto. FIG. 1 shows a schematic diagram of an apparatus used in the method for producing a thermoplastic polymer sheet of the present invention. In FIG.
口金１から溶融押出された重合体シート２ば、移動冷却
体（この場合、冷却ローラー）３に接触し。The polymer sheet 2 melt-extruded from the die 1 comes into contact with a moving cooling body (in this case, a cooling roller) 3.
冷却固化され、引離しローラー４を介して後処理工程へ
連続的に送られる。It is cooled and solidified, and is continuously sent to a post-treatment process via a separating roller 4.
冷却ローラー３の表面上には、絶縁性皮膜５を６−
設け、さらにその」二に導電性皮膜６を設ける。導電性
皮膜６は、高圧電源７から直接印加され高電位に保持さ
れる。絶縁ガスは、ボンベ８よりノズル９を通して重合
体シート２と移動冷却体６との接触点近傍へ連続的に供
給される。An insulating film 5 is provided on the surface of the cooling roller 3, and a conductive film 6 is further provided on the surface thereof. A high potential is directly applied to the conductive film 6 from a high voltage power source 7 and maintained at a high potential. The insulating gas is continuously supplied from the cylinder 8 through the nozzle 9 to the vicinity of the contact point between the polymer sheet 2 and the moving cooling body 6.
−に記において８口金１は、接地されているのが好捷し
いが、冷却体側の表面は絶縁体で覆われていても」＝い
。In the above, it is preferable that the cap 1 is grounded, but the surface on the cooling body side may be covered with an insulator.
本発明は２重合体シートの移動冷却体との接触点近傍を
、空気より電気絶縁性の高いガスの雰囲気に保つことに
より、シート製造速゛度の上限が。In the present invention, the upper limit of the sheet manufacturing speed can be set by maintaining the vicinity of the contact point of the bipolymer sheet with the moving cooling body in an atmosphere of gas having higher electrical insulation properties than air.
従来より著しく大幅に高めることができだ。This can be significantly improved compared to conventional methods.
以下、実施例に基づいて本発明の一実施態様を説明する
。Hereinafter, one embodiment of the present invention will be described based on Examples.
実施例１
第１図に示した装置を用い、ポリエチレンテレフタレー
トのシートを成型した。装置条件は２ロ金幅４００ｍｍ
、ロ金スリット幅１ ｍｍ 、冷却ローラー径８００ｍ
ｍ、ノズル幅４００皿であり、絶縁ガスとして、六フッ
化硫黄（誘電破壊電圧は、空気の２２倍）を流量１１／
分で連続的にノズルより供給した。ローラー印加電圧は
、ローラー速度を上昇させながら、シートの密着不良が
起こるとその都度昇圧させた。また同時に、ローラー電
位変動をオシロスコープにてモニターし、微小放電の発
生をチェックした。Example 1 A sheet of polyethylene terephthalate was molded using the apparatus shown in FIG. Equipment conditions are 2-ro gold width 400mm.
, metal slit width 1 mm, cooling roller diameter 800 m
m, the nozzle width is 400 m, and the insulating gas is sulfur hexafluoride (dielectric breakdown voltage is 22 times that of air) at a flow rate of 11/m.
It was continuously supplied from the nozzle in minutes. The voltage applied to the roller was increased each time poor adhesion of the sheets occurred while increasing the roller speed. At the same time, the roller potential fluctuations were monitored using an oscilloscope to check for the occurrence of minute discharges.
上述の方法により、シートを製造したところ。A sheet was manufactured using the method described above.
５０ ｋｖに昇圧しても微小放電は発生せず、シートの
密着不良が起こり始める速度は、９０ｍ／分であった。Even when the pressure was increased to 50 kV, no microdischarge occurred, and the speed at which sheet adhesion failure began was 90 m/min.
比較例１
ガスを供給しなかった以外は実施例１と同じ方法でシー
トを製造したところ、１４ｋＶで微小放電が起こり始め
、１４ｋＶ以上に電圧を上げるとシートの密着力が低下
した。その結果シートの密着不良が起こり始める速度は
、３０ｍ／分以上にはできなかった。Comparative Example 1 A sheet was manufactured in the same manner as in Example 1 except that no gas was supplied. When the sheet was manufactured, micro discharge started to occur at 14 kV, and when the voltage was increased to 14 kV or higher, the adhesion of the sheet decreased. As a result, the speed at which sheet adhesion failure began could not be increased to 30 m/min or higher.
以上の例より明らかなように本発明の方法によりシート
製造速度の上限が従来より著しく大幅に高められた。As is clear from the above examples, the method of the present invention allows the upper limit of sheet production speed to be significantly increased compared to the conventional method.
第１図は２本発明に使用する装置の概略断面図である。
１：口金 ２＝重合体シート３：移動冷
却体 ４：引離しローラー５：絶縁性皮膜
６：導電性皮膜７：電源装置 ８：絶
縁ガス９：ノズル
特許出願人 東 し 株 式 会 社９−
第１ 図
手 続 補 ｉｌ：？’、’ｉ
特許庁長官 若 杉 和 夫 殿
１、事件の表示
昭和５８年特許願第１Ｉ２３２３弓
２、発明の名称
熱可塑性重合体シートの製造方法
３、補正をする者
自発
５、補正により増加する発明の数
なし
６、補止の対象
明細書の「特ｔ′［請求の範囲ＪおＪ：び［発明の詳細
な説明１の各欄
７、補正の内容
く１） 明細措 第１頁
特許請求の範囲を別紙の通り補正する。
（２） 同 第４頁６行目
「表面を高電位に保って静電的に」を「表面と［１金と
の間（こ電圧を印加し静電的ｔこ］と補正する。
く３） 同 第４頁８行目
「シートの移動」を「シー１〜と移動」と補正づ′る。
（４） 同 第５頁４行〜５行目
「含まれるものとする。なお、移動」を「含まれるもの
とする。本発明が適用される装置（ま、口。
金または移動冷却体の少なくとも一方が大地（アース線
）に対して電気的に絶縁されＩこものである。
なお、移動」と補正覆る。
（５） 同 第５頁１３行〜１６行目
［被覆されていてもよい。・・・・・・・・・（負）が
好ましい。」を［被覆されていてもＪ：い。ま１こ、口
金を絶縁する方法には、口金自体をアースに対し絶縁す
る方法のほか、口金内部の重合体と接触″ｔＪ−る部分
に導電■を設り、イの導電層をアースに対して絶縁する
方法も含まれるものとし、後者の場合、電圧の印加され
る部分としての口金はその導電層を指すものとする。
移動冷却体表面と口金との間に印加する電圧は、交流、
直流のいずれでもよいが、−望ましくは電圧変動率１％
以下の直流で移動冷却体側が口金に対して負であるのが
好ましい。」と補正する。
（６） 同 第７頁２行〜３行目
「皮膜６は、・・・・・・・・・保持される。」を［皮
ＩＩＩＪ６と口金１の間は、電ｍ装置７により電圧が印
加される。Ｊと補正する。
（７） 同 第７頁６行〜８行目
［上記において、・・・・・・・・・覆われていてもよ
い。］を削除する。
〈別紙）
特許請求の範囲
（１）融解した熱可塑性重合体を、口金からシート状に
して移動冷却体上へ押出し、該移動冷却体表面と口金と
の間に電圧を印加し静電的に密着固化せしめる重合体シ
ー１への製造方法において、該重合体シートζ移動冷１
．０体との接触点近傍を、空気より電気絶縁性の高いガ
スの雰囲気に保つことを特徴どする熱可塑性重合体シー
トの製造方法。
１−FIG. 1 is a schematic sectional view of an apparatus used in the present invention. 1: Base 2 = Polymer sheet 3: Moving cooling body 4: Peeling roller 5: Insulating film
6: Conductive film 7: Power supply device 8: Insulating gas 9: Nozzle Patent applicant Toshi Co., Ltd. 9- Figure 1 Procedure supplement il: ? ','i Kazuo Wakasugi, Commissioner of the Japan Patent Office1, Indication of the case 1982 Patent Application No. 1 I2323 Bow2, Name of the invention Method for manufacturing thermoplastic polymer sheet3, Spontaneity of the person making the amendment5, Increased by amendment There is no number of inventions to be supplemented.6, "Special feature t' [Claims J and J: and [Detailed Description of the Invention 1, each column 7, Contents of amendment 1]" in the specification to be supplemented, Specification Measures Page 1 The scope of the claims is amended as shown in the attached sheet. (2) On page 4, line 6 of the same, "electrostatically by keeping the surface at a high potential" has been changed to "between the surface and gold (by applying this voltage)". 3) Correct "sheet movement" on page 4, line 8, to "move with sheet 1". (4) Page 5, lines 4 and 5 of the same document, ``Includes.'' In addition, ``Movement'' is changed to ``Includes.'' At least one side is electrically insulated from the earth (earth wire) and covered. (5) Same page 5, lines 13 to 16 [It may be covered.・・・・・・・・・(Negative) is preferable.' This also includes a method of insulating the conductive layer (A) from the ground by providing a conductive layer in the part that contacts the polymer inside the cap. The cap shall refer to its conductive layer.The voltage applied between the surface of the moving cooling body and the cap shall be an alternating current,
Any direct current may be used, but preferably voltage fluctuation rate is 1%
It is preferable that the movable cooling body side is negative with respect to the base under direct current. ” he corrected. (6) On page 7, lines 2 and 3, "The film 6 is maintained." applied. Correct it with J. (7) Page 7, lines 6 to 8 [In the above, it may be covered. ] Delete. <Attachment> Claims (1) A molten thermoplastic polymer is extruded from a die in the form of a sheet onto a moving cooling body, and a voltage is applied between the surface of the moving cooling body and the die to electrostatically In the method for producing a polymer sheet 1 which is closely solidified, the polymer sheet ζ is moved by cooling 1
．． 1. A method for producing a thermoplastic polymer sheet, characterized in that the vicinity of the point of contact with a zero body is maintained in an atmosphere of a gas having higher electrical insulation than air. 1-
Claims (1)
状にして移動冷却体上へ押出し、該移動冷却体表面を高
電位に保って静電的に密着固化せしめる重合体シートの
製造方法において、該重合体シートの移動冷却体との接
触点近傍を、空気より電気絶縁性の高いガスの雰囲気に
保つことを特徴とする熱可塑性重合体シートの製造方法
。(1) A method for producing a polymer sheet in which a molten thermoplastic polymer is extruded into a sheet from two nozzles onto a moving cooling body, and the surface of the moving cooling body is held at a high potential to electrostatically adhere and solidify, A method for producing a thermoplastic polymer sheet, characterized in that the vicinity of the contact point of the polymer sheet with a moving cooling body is maintained in an atmosphere of a gas having higher electrical insulation properties than air.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58042323A JPS59169815A (en) | 1983-03-16 | 1983-03-16 | Manufacture of thermoplastic polymer sheet |
| US06/588,963 US4594203A (en) | 1983-03-16 | 1984-03-13 | Method for producing a thermoplastic polymeric sheet |
| DE8484301767T DE3472774D1 (en) | 1983-03-16 | 1984-03-15 | Method for producing a thermoplastic polymeric sheet |
| EP84301767A EP0122721B1 (en) | 1983-03-16 | 1984-03-15 | Method for producing a thermoplastic polymeric sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58042323A JPS59169815A (en) | 1983-03-16 | 1983-03-16 | Manufacture of thermoplastic polymer sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59169815A true JPS59169815A (en) | 1984-09-25 |
| JPS637135B2 JPS637135B2 (en) | 1988-02-15 |
Family
ID=12632796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58042323A Granted JPS59169815A (en) | 1983-03-16 | 1983-03-16 | Manufacture of thermoplastic polymer sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59169815A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102355755B1 (en) | 2017-12-14 | 2022-02-08 | 코카 크롬 인더스트리 컴퍼니 리미티드 | Cooling roll and method for producing thermoplastic resin sheet using same |
| WO2019116600A1 (en) | 2017-12-14 | 2019-06-20 | 硬化クローム工業株式会社 | Cooling roll and method for producing thermoplastic resin sheet using same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5028108A (en) * | 1973-07-16 | 1975-03-22 |
-
1983
- 1983-03-16 JP JP58042323A patent/JPS59169815A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5028108A (en) * | 1973-07-16 | 1975-03-22 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS637135B2 (en) | 1988-02-15 |
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