JPS6242822A - Manufacture of thermoplastic resin sheet or film - Google Patents
Manufacture of thermoplastic resin sheet or filmInfo
- Publication number
- JPS6242822A JPS6242822A JP61180026A JP18002686A JPS6242822A JP S6242822 A JPS6242822 A JP S6242822A JP 61180026 A JP61180026 A JP 61180026A JP 18002686 A JP18002686 A JP 18002686A JP S6242822 A JPS6242822 A JP S6242822A
- Authority
- JP
- Japan
- Prior art keywords
- slit
- cooling water
- thermoplastic resin
- water
- cooling
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は熱可塑性樹脂シートまたはフィルムの製造方法
に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for producing a thermoplastic resin sheet or film.
［従来の技術及び発明が解決しようとする問題点］
従来、熱可塑性樹脂のＴ−グイ急冷フィルムまたはシー
トの製造方法としてチルロール法、水冷法などが知られ
ている。しかし、チルロール法は高速成形詩、ロールと
溶融樹脂膜の間に空気をまき込んだり、ロールと溶融樹
脂膜の密着性が悪いために厚みムラやシワなどが発生し
たり、さらには厚物シート等にあっては溶融樹脂膜の表
面と裏面の冷却差によるカールの発生や不七分な急冷に
よる透明性２表面光沢の低下などの欠点がある。[Prior Art and Problems to be Solved by the Invention] Conventionally, chill roll methods, water cooling methods, and the like are known as methods for producing T-Gui quenched films or sheets of thermoplastic resins. However, the chill roll method is a high-speed forming process, and air is mixed in between the roll and the molten resin film, and the adhesion between the roll and the molten resin film is poor, resulting in uneven thickness and wrinkles. However, there are drawbacks such as the occurrence of curls due to the difference in cooling between the front and back surfaces of the molten resin film, and a decrease in transparency and surface gloss due to uneven rapid cooling.
また、水冷法では溶融樹脂膜からの放熱が冷却水面にお
いて局部的に生じて水面の波立ち、揺れなどに起因する
冷却の不均一、冷却不足から厚みムラや透明性１表面光
沢のムラや低下が生じ、高速成形を行なえないという欠
点がある。In addition, in the water cooling method, heat dissipation from the molten resin film occurs locally on the cooling water surface, resulting in uneven cooling due to ripples and shaking of the water surface, and uneven thickness and loss of transparency and surface gloss due to insufficient cooling. This has the disadvantage that high-speed molding cannot be performed.
ところで、水冷法はロール法よりも効率よくシート等を
冷却できるという利点がある。そのため、前記した水冷
法の欠点を改良する方法として、溶融樹脂膜の両面を流
動する冷却水流によって冷却することが提案されている
（特公昭４３−１７８１７号）。しかしながら、この改
良法においても、冷却効率が低いこと、及び冷却水の乱
流によってポリプロピレンなとの結晶性樹脂から透明性
２表面性にすぐれたシート類を生産性良く製造すること
は困難である。By the way, the water cooling method has the advantage of being able to cool sheets etc. more efficiently than the roll method. Therefore, as a method for improving the above-mentioned drawbacks of the water cooling method, it has been proposed to cool the molten resin film with a stream of cooling water flowing on both sides of the film (Japanese Patent Publication No. 17817/1983). However, even with this improved method, it is difficult to efficiently produce sheets with excellent transparency and surface properties from crystalline resins such as polypropylene due to low cooling efficiency and turbulent flow of cooling water. .
すなわち、膜状の熱可塑性樹脂が冷却水に最初に接する
点からスリット入口での水位が高いと、」−面近くの冷
却水が滞留し、初期の冷却効果が低下するため透明性が
低下する。また水位を高くして滞留をなくするためには
流速を一トげなければならなく、この場合乱流を防止で
きない。さらに冷却水を−Ｌ向きに流す場合も同様であ
る。したがって冷却水の滞留と乱流を防止しないと、膜
状熱可塑性樹脂の冷却を均一にすることができず、結果
として透明性や表面光沢のすぐれたシートやフィルムを
得ることができない。In other words, if the water level at the slit entrance is high from the point where the film-like thermoplastic resin first comes into contact with the cooling water, the cooling water will stay near the surface, reducing the initial cooling effect and reducing transparency. . Furthermore, in order to raise the water level and eliminate stagnation, the flow velocity must be increased, and in this case, turbulence cannot be prevented. The same applies to the case where the cooling water is made to flow in the -L direction. Therefore, unless stagnation and turbulence of cooling water are prevented, it is impossible to uniformly cool the thermoplastic resin film, and as a result, it is impossible to obtain a sheet or film with excellent transparency and surface gloss.
［問題点を解決するための手段］
本発明は、Ｔ−ダイから溶融状態で押出された膜状の熱
可塑性樹脂を冷却水の流下するスリー／ ）に導入して
急冷するに際し、スリット入口での水位を７ＩＩ１１以
下に保持しながら冷却水をスリ・ントに流入させること
を特徴とする熱可塑性樹脂シートまたはフィルムの製造
方法に関するものである。[Means for Solving the Problems] The present invention provides a method for rapidly cooling a film-like thermoplastic resin extruded from a T-die in a molten state by introducing it into a slit in which cooling water flows down. The present invention relates to a method for producing a thermoplastic resin sheet or film, characterized in that cooling water is allowed to flow into a slint while maintaining the water level at 7II11 or lower.
本発明においてシートやフィルムの原料として用いる熱
可塑性樹脂としては特に制限がなく、たとえばポリオレ
フィン（ポリエチレン、ポリプロピレンなど）、ポリス
チレン、ポリ塩化ビニル等を挙げることができ、特に従
来よりシート等の透明性や表面性などに問題のあった結
晶性熱可塑性樹脂についてもこのような問題を生起する
ことなく使用することができる。また、本発明のシート
やフィルムには多層シートやフィルムも含まれ、さらに
シリカ、タルク、バラ−ターシャリ−ブチル安息香酸、
アルミニウム、ジベンジリデンソルビトールなどの造核
剤を添加したものも含まれる。The thermoplastic resin used as a raw material for sheets and films in the present invention is not particularly limited, and examples thereof include polyolefins (polyethylene, polypropylene, etc.), polystyrene, polyvinyl chloride, etc. Even crystalline thermoplastic resins that have problems with surface properties can be used without causing such problems. Further, the sheets and films of the present invention include multilayer sheets and films, and further include silica, talc, bara-tertiary-butylbenzoic acid,
It also includes those to which nucleating agents such as aluminum and dibenzylidene sorbitol are added.
本発明は基本的には水冷法による熱可塑性樹脂シートま
たはフィルムの製造法に関するものである。Ｔ−ダイか
ら押出される溶融状態の膜状熱可塑性樹脂を冷却水の流
れるスリットに導入する場合、該スリット入口における
水位を可及的に低くしないと、膜状熱可塑性樹脂の冷却
が不均一になり、透明性や表面光沢のすぐれたシートや
フィルムを得ることができない。The present invention basically relates to a method for producing thermoplastic resin sheets or films by water cooling. When a molten thermoplastic resin film extruded from a T-die is introduced into a slit through which cooling water flows, the water level at the entrance of the slit must be kept as low as possible, otherwise the thermoplastic resin film will not be cooled uniformly. This makes it impossible to obtain sheets or films with excellent transparency and surface gloss.
本発明の製造方法について図面にもとづいて説明する。The manufacturing method of the present invention will be explained based on the drawings.
第１図において、Ｔ−ダイ１から溶融状態で押出された
膜状の熱可塑性樹脂２を冷却水が流下しているスリット
３に導入する。このスリットはＴ−ダイｌの下方に位置
する水槽４と接続して形成されており、通常、長さは５
〜１００ｍ厘であるが３０〜５０ｍｍが好ましい。水槽
４にあっては導入される膜状熱可塑性樹脂と接触する冷
却水が層流状態で流動しながら流下することが好ましい
。したがって水層の水位は前記したように可及的に低く
すべきであり、これによって部分沸騰の防止や冷却点の
均一化を図ることができる。本発明にあっては、スリッ
ト入口部における水位を７ｍｍ以下とする。このように
低い水位に制御することによって、スリット入口部にお
ける冷却水の流下を滞留を生ずることなくスムースに行
なうことができる。ここで水位が１０ｍｍとなると得ら
れたシートに沸騰斑、ヘイズ斑、カールが発生し総ヘイ
ズも２５〜２８％となり、好ましくない。冷却水は水槽
４からスリット３に流下しているため、膜状熱可塑性樹
脂は、該スリット３を通過する際に冷却水によって両面
を均等に冷却される。すなわち、膜状樹脂と冷却水の走
行方向が同一であり膜状樹脂の両面を冷却水が平行に流
れ、効率的に冷却される。この冷却水の流下速度は膜状
樹脂の走行速度と同じか、またはそれ以上であることが
望ましい。もちろん、スリットの入口部は冷却水の流下
をスムースにするためアールをつけた方が好ましい。な
お、スリットの巾は、特に制限はないが通常１■〜５Ｉ
Ｉ１１である。In FIG. 1, a thermoplastic resin film 2 extruded in a molten state from a T-die 1 is introduced into a slit 3 through which cooling water is flowing. This slit is connected to the water tank 4 located below the T-die l, and usually has a length of 5.
-100m, preferably 30-50mm. In the water tank 4, it is preferable that the cooling water that comes into contact with the introduced film-like thermoplastic resin flows down while flowing in a laminar flow state. Therefore, the water level of the water layer should be as low as possible as described above, thereby preventing partial boiling and making the cooling point uniform. In the present invention, the water level at the slit entrance is 7 mm or less. By controlling the water level to such a low level, the cooling water can flow down smoothly at the slit entrance without causing any stagnation. When the water level reaches 10 mm, boiling spots, haze spots, and curls occur on the obtained sheet, and the total haze becomes 25 to 28%, which is not preferable. Since the cooling water is flowing down from the water tank 4 to the slit 3, both sides of the thermoplastic resin film are uniformly cooled by the cooling water when passing through the slit 3. That is, the traveling direction of the film-like resin and the cooling water are the same, and the cooling water flows in parallel on both sides of the film-like resin, thereby efficiently cooling the resin film. It is desirable that the cooling water flow speed be equal to or higher than the traveling speed of the film-like resin. Of course, it is preferable to round the entrance of the slit so that the cooling water can flow smoothly. There is no particular limit to the width of the slit, but it is usually 1 to 5 inches.
It is I11.
上記のように冷却水の流下するスリットに導入されて冷
却された膜状樹脂は、ガイドロール５、水切りロール６
を通り、引取珠ロール７により引取られる。なおガイド
ロール５については膜状樹脂をスリットの中央に位置す
ることによりカール防止に有効であると共に、−組の談
−圧ロールとしてロール鏡面の転写を兼ねることもでき
る。The film-like resin introduced into the slit through which the cooling water flows and cooled as described above is transferred to the guide roll 5 and the draining roll 6.
The bead roll 7 takes over the beads. The guide roll 5 is effective in preventing curling by placing the film-like resin at the center of the slit, and can also serve as a set of pressure rolls to transfer the mirror surface of the roll.
本発明に用いる冷却水の温度については、特に制限はな
く、２〜３０℃の範囲が好ましく、必要に応じて適当な
界面活性剤を添加して膜状樹脂にのぬれを良くしたり、
冷却水の氷結点降下剤を添加して低温冷却を行なうこと
もできる。図中８は水位調節板、９は溢流板、１ｏは冷
却器、１１はポンプである。The temperature of the cooling water used in the present invention is not particularly limited, and is preferably in the range of 2 to 30°C, and if necessary, an appropriate surfactant may be added to improve wetting to the film-like resin.
Low-temperature cooling can also be achieved by adding a freezing point depressant to the cooling water. In the figure, 8 is a water level adjustment plate, 9 is an overflow plate, 1o is a cooler, and 11 is a pump.
［発明の効果］
本発明の、改良された水冷法によれば、結晶性の熱可塑
性樹脂を原料としてシートやフィルムを製造する場合で
も、未配向で透明性９表面光沢にすぐれたシート等を得
ることができる。しかも、得られるシート等に厚みムラ
、シワ、カールなどがなく、均一性にすぐれている。ま
た、本発明の方法は１０ｍ／！Ｉｉｎ以−Ｌの高速成形
によってシート等を得ることができ、かつ冷却コスト等
が低いなどの特色を有している。[Effects of the Invention] According to the improved water cooling method of the present invention, even when producing sheets or films using crystalline thermoplastic resin as raw material, it is possible to produce sheets etc. that are unoriented and have excellent transparency and surface gloss. Obtainable. In addition, the resulting sheets are free from uneven thickness, wrinkles, curls, etc., and have excellent uniformity. Moreover, the method of the present invention is 10m/! It has features such as being able to obtain sheets etc. by high-speed molding from Iin to L and having low cooling costs.
本発明の方法によって得られるシートやフィルムは、」
−記の如くすぐれた性質を有しているため、食品、医薬
品などの包装用などに好適である。また、圧空成形、ロ
ール圧延成形、延伸成形などの固相成形用の原反として
用いることもできる。The sheet or film obtained by the method of the present invention is
- Since it has excellent properties as described above, it is suitable for packaging foods, medicines, etc. Moreover, it can also be used as a raw material for solid phase forming such as air pressure forming, roll rolling, and stretch forming.
［実施例］ 次に、本発明を実施例により説明する。[Example] Next, the present invention will be explained by examples.
実施例】
ポリプロピレン（密度０．９１ ｇ／ｃｍ３ 、メルト
インデック７、２．０ ｇ／１０分）を樹脂温度２８０
’ｃでＴ−ダイ押出装置（押出機６０ｍ＋ｗ＜６ 、
Ｌ／Ｄ ＝ ２８ 、ダイ巾５５０ｍ＋ｍ、 ダイリ
ップ開度１ ＋ａｍ）を用いて膜状に押出した。押出さ
れた溶融樹脂膜を冷却水（水温１６℃）の水位を７■以
下として流下させたスリット（巾２■、長さ４５ｍｍ）
に導入して冷却し、水切り後引取ロールで引取り、成形
速度２０ｍ／分で、０．２ｍ＋ｗ厚みのポリプロピレン
シートを製造した。Example: Polypropylene (density 0.91 g/cm3, melt index 7, 2.0 g/10 min) was heated to a resin temperature of 280 g/cm3.
T-die extrusion device (extruder 60m+w<6,
It was extruded into a film using L/D = 28, die width 550m+m, and die lip opening degree 1+am). A slit (width 2 cm, length 45 mm) through which the extruded molten resin film was allowed to flow down with the water level of cooling water (water temperature 16°C) being 7 cm or less.
After draining, the sheet was taken up with a take-up roll at a molding speed of 20 m/min to produce a polypropylene sheet with a thickness of 0.2 m+w.
得られたシートには、わずかにヘイズ斑がみられたが、
沸騰斑、カールがまったくない透明性の良好なシートで
あった。なお、総ヘイズは１８％（内部ヘイズ：８％、
外部ヘイズ：１０％）であった。The obtained sheet had slight haze spots, but
The sheet had good transparency with no boiling spots or curls. The total haze is 18% (internal haze: 8%,
External haze: 10%).
比較例１
実施例１において、水位を１０ｍｍとした以外は実施例
１に準じてポリプロピレンシートを得た。このシートは
、佛騰斑、ヘイズ斑、カールが発生し、トータルヘイズ
も２５〜２８％となり、透明性。Comparative Example 1 A polypropylene sheet was obtained in the same manner as in Example 1, except that the water level was 10 mm. This sheet has bulge spots, haze spots, and curls, and has a total haze of 25 to 28%, and is transparent.
光沢９表面性の悪いものであった。Gloss 9: Poor surface properties.
比較例２
実施例１と同じ原料、押出条件で溶融状態の膜状樹脂を
押出し、鏡面ロール（４０’Ｃ！ ）上にエアーナイフ
で空気を吹付けて冷却しポリプロピレンシートを得た。Comparative Example 2 A molten resin film was extruded using the same raw materials and extrusion conditions as in Example 1, and was cooled by blowing air onto a mirror roll (40'C!) with an air knife to obtain a polypropylene sheet.
このシートは、ヘイズが４２％と透明性が非常に悪く、
エアーマークの発生がみられた。This sheet has very poor transparency with a haze of 42%.
Air marks were observed.
実施例２
実施例１において、ポリプロピレンとして、メルー・イ
ンデックス８ ｇ７１０分、水槽水位４ ａＩｌｌ、ス
リット巾４１１１１．冷却水温４°Ｃ９成形速度１０ｍ
／分とした以外は実施例１に準じて成形し、ポリプロピ
レンシートを得た。シートの外観は良好で、総へイズは
１１％（内部ヘイズ：５％、外部ヘイズ：６％）であっ
た。Example 2 In Example 1, as polypropylene, Meru index 8 g 710 minutes, water tank water level 4 aIll, slit width 41111. Cooling water temperature 4°C9 Molding speed 10m
A polypropylene sheet was obtained by molding in the same manner as in Example 1 except that the molding time was changed to /min. The appearance of the sheet was good, and the total haze was 11% (internal haze: 5%, external haze: 6%).
比較例３
実施例２において、水槽水位１０＋ｓｍとした以外は実
施例２に準じてポリプロピレンシートを得たが、澗騰斑
、ヘイズ斑が発生し、外観不良であった。Comparative Example 3 A polypropylene sheet was obtained in the same manner as in Example 2 except that the water tank water level was 10+sm, but the sheet had a poor appearance with rising spots and haze spots.
第１図は、本発明の方法を実施する装置の態様を示す説
明図である。
１・・・Ｔ−ダイ、 ２川膜状熱可塑性樹脂。
３・・・スリット、 ４・・・水槽。
７・・・引取ロールFIG. 1 is an explanatory diagram showing an embodiment of an apparatus for carrying out the method of the present invention. 1...T-die, two-layer film-like thermoplastic resin. 3...Slit, 4...Aquarium. 7...Takeover roll
Claims (1)
を冷却水の流下するスリットに導入して急冷するに際し
、スリット入口での水位を７ｍｍ以下に保持しながら冷
却水をスリットに流入させることを特徴とする熱可塑性
樹脂シートまたはフィルムの製造方法。When the film-like thermoplastic resin extruded from the T-die in a molten state is introduced into the slit through which cooling water flows and is rapidly cooled, the cooling water is allowed to flow into the slit while maintaining the water level at the slit entrance to 7 mm or less. A method for producing a thermoplastic resin sheet or film, characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61180026A JPS6242822A (en) | 1986-08-01 | 1986-08-01 | Manufacture of thermoplastic resin sheet or film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61180026A JPS6242822A (en) | 1986-08-01 | 1986-08-01 | Manufacture of thermoplastic resin sheet or film |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57086475A Division JPS58203018A (en) | 1982-05-24 | 1982-05-24 | Manufacture of thermoplastic resin sheet or film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6242822A true JPS6242822A (en) | 1987-02-24 |
| JPH0419012B2 JPH0419012B2 (en) | 1992-03-30 |
Family
ID=16076169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61180026A Granted JPS6242822A (en) | 1986-08-01 | 1986-08-01 | Manufacture of thermoplastic resin sheet or film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6242822A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5204037A (en) * | 1991-01-25 | 1993-04-20 | Idemitsu Petrochemical Co., Ltd. | Process for production of polypropylene sheets or films |
| US5211899A (en) * | 1990-10-23 | 1993-05-18 | Idemitsu Petrochemical Co., Ltd. | Process for production of polypropylene sheets or films |
| US5299926A (en) * | 1991-10-24 | 1994-04-05 | Sumika-Hercules Co., Ltd. | Spinning apparatus having a tubular elastomeric flow control valve body |
| US5658514A (en) * | 1993-03-04 | 1997-08-19 | Idemitsu Petrochemical Co., Ltd. | Method for producing thermoplastic resin sheet or film |
| US5707478A (en) * | 1993-02-25 | 1998-01-13 | Idemitsu Petrochemical Co., Ltd. | Method for producing thermoplastic resin sheet or film |
-
1986
- 1986-08-01 JP JP61180026A patent/JPS6242822A/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5211899A (en) * | 1990-10-23 | 1993-05-18 | Idemitsu Petrochemical Co., Ltd. | Process for production of polypropylene sheets or films |
| US5204037A (en) * | 1991-01-25 | 1993-04-20 | Idemitsu Petrochemical Co., Ltd. | Process for production of polypropylene sheets or films |
| US5299926A (en) * | 1991-10-24 | 1994-04-05 | Sumika-Hercules Co., Ltd. | Spinning apparatus having a tubular elastomeric flow control valve body |
| US5707478A (en) * | 1993-02-25 | 1998-01-13 | Idemitsu Petrochemical Co., Ltd. | Method for producing thermoplastic resin sheet or film |
| US5658514A (en) * | 1993-03-04 | 1997-08-19 | Idemitsu Petrochemical Co., Ltd. | Method for producing thermoplastic resin sheet or film |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0419012B2 (en) | 1992-03-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6210816B2 (en) | ||
| US4548778A (en) | Method of producing thermoplastic resin sheet or film | |
| CA2053779C (en) | Process for production of polypropylene sheets or films | |
| JPS6242822A (en) | Manufacture of thermoplastic resin sheet or film | |
| SE423878B (en) | PROCEDURE FOR MANUFACTURING THIN-WALL ARTICLES OF CRYSTALLIC THERMOPLASTIC MATERIAL | |
| JPS5957720A (en) | Manufacture of thermoplastic resin sheet or film | |
| EP0135628B1 (en) | Method of producing thermoplastic resin sheet or film | |
| JPS6127231A (en) | Manufacture of fluorine plastic film | |
| CN115534464A (en) | High-gloss and high-transparency BOPP film and preparation method and application thereof | |
| JPS636345B2 (en) | ||
| JPS6245811B2 (en) | ||
| JPS58173621A (en) | Preparation of thermoplastic resin sheet or film | |
| JPH0431025A (en) | Manufacture of thermoplastic resin sheet or film and device therefor | |
| JPS60236719A (en) | Cooler for thermoplastic resin | |
| JPH0262377B2 (en) | ||
| JPH07100960A (en) | Metallic roll, production of resin sheet, and production device therefor | |
| JPH0245976B2 (en) | NIJIKUENSHINHORIIIPUSHIRONNKAPUROAMIDOFUIRUMUNOSEIZOHOHO | |
| JPS62148235A (en) | Manufacture of thermoplastic resin sheet | |
| JPH03110121A (en) | Manufacture of vinylidene fluoride resin film having excellent transparency | |
| JPS6026010B2 (en) | Method for manufacturing water-cooled inflation film | |
| JP3238742B2 (en) | Method and apparatus for producing a textured sheet | |
| JPH0225775B2 (en) | ||
| JPH03158221A (en) | Manufacture of polychlorotrifluoroethylene film or sheet | |
| JP2002137287A (en) | Manufacturing method for oriented film | |
| JPH04118214A (en) | Manufacture of transparent film, sheet or tube |