JP2635383B2 - Method for producing wholly aromatic polyester film - Google Patents
Method for producing wholly aromatic polyester filmInfo
- Publication number
- JP2635383B2 JP2635383B2 JP63242128A JP24212888A JP2635383B2 JP 2635383 B2 JP2635383 B2 JP 2635383B2 JP 63242128 A JP63242128 A JP 63242128A JP 24212888 A JP24212888 A JP 24212888A JP 2635383 B2 JP2635383 B2 JP 2635383B2
- Authority
- JP
- Japan
- Prior art keywords
- die
- wholly aromatic
- aromatic polyester
- present
- film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
-
- 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
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
- B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は特殊構造のインフレーシヨン成形用リングダ
イを用いる、機械的物性の優れた光学異方性全芳香族ポ
リエステルフイルムの製造法に関するものである。The present invention relates to a method for producing an optically anisotropic wholly aromatic polyester film having excellent mechanical properties using a ring die for inflation molding having a special structure. .
光学異方性を有する全芳香族ポリエステルフイルムを
溶融押出し、インフレーシヨン成形することにより高強
力、高ヤング率の機械的物性の優れたフイルムが得られ
ることはよく知られている。It is well known that a wholly aromatic polyester film having optical anisotropy is melt-extruded and subjected to inflation molding to obtain a film having high strength, high Young's modulus and excellent mechanical properties.
しかしながら、かかるフイルムは機械軸方向（以下MD
方向と略す）の物性のみが優れ、それと直角方向（以下
TD方向と略す）の物性が低く、裂けやすい等の欠点を有
している。この改良方法としてDT方向の延伸倍率をMD方
向の延伸倍率の2.5倍以上にすることが特開昭61−10223
4号公報に述べられている。However, such a film is oriented in the machine axis direction (MD
Direction only), and the direction perpendicular to it (hereinafter
(Hereinafter abbreviated as TD direction) have low physical properties and are easily broken. As an improved method, the stretching ratio in the DT direction is set to be 2.5 times or more of the stretching ratio in the MD direction.
No. 4 discloses this.
特開昭61−102234号公報に記載の方法では、MD方向の
延伸倍率を低いレベルにおさえる必要があり、成膜スピ
ードを上げることができず、生産性が悪い。In the method described in JP-A-61-102234, the stretching ratio in the MD direction must be kept at a low level, and the film forming speed cannot be increased, resulting in poor productivity.
而して、本発明の目的はMD、TDの両方向に機械的物性
の優れた全芳香族ポリエステルフイルムを効率よく製造
する方法を提供することにある。An object of the present invention is to provide a method for efficiently producing a wholly aromatic polyester film having excellent mechanical properties in both directions of MD and TD.
〔課題を解決するための手段〕 本発明者は鋭意検討を重ねた結果、光学異方性を有す
る全芳香族ポリエステル樹脂がダイを出てからTD方向へ
の延伸を開始するのではなく、ダイ内部からTD方向への
延伸を開始することが本発明の目的を達成することを見
いだし、本発明を完成するに至った。[Means for Solving the Problems] As a result of intensive studies, the present inventor did not start stretching in the TD direction after the wholly aromatic polyester resin having optical anisotropy exited the die, but It has been found that starting the stretching in the TD direction from the inside achieves the object of the present invention, and the present invention has been completed.
すなわち、本発明はインフレーシヨン成形におけるリ
ングダイのランド部がダイ内部から出口にかけてその口
径が1.2倍以上円錐状に拡大された構造を有するダイを
用いてのMD、TDの両方向に機械的物性の優れた全芳香族
ポリエステルフイルムの製造方法である。In other words, the present invention provides mechanical properties in both the MD and TD directions using a die having a structure in which the land portion of the ring die in the inflation molding has a diameter that is 1.2 times or more conical from the die interior to the exit. This is a method for producing a wholly aromatic polyester film excellent in the above.
本発明において用いられる全芳香族ポリエステル化合
物の具体例としては以下に例示する（１）から（３）の
化合物およびその誘導体から導かれる公知の全芳香族ポ
リエステルを挙げることができる。但し、光学異方性
（液晶）を有するためには、各々の原料化合物の組み合
わせには適当な範囲があることは言うまでもない。Specific examples of the wholly aromatic polyester compound used in the present invention include known wholly aromatic polyesters derived from the compounds (1) to (3) and derivatives thereof exemplified below. However, it goes without saying that there is an appropriate range for each combination of the starting compounds in order to have optical anisotropy (liquid crystal).
（１）芳香族または脂肪族ジヒドロキシ化合物 （Ｘは水素原子、ハロゲン、低級アルキル基、フエニル
基など） （Ｙは−Ｏ−、−CH2−など） HO（CH2）nOH（ｎは２〜12の整数） （２）芳香族または脂肪族ジカルボン酸 HOOC（CH2）nCOOH（ｎは２〜12の整数） （３）芳香族ヒドロキシカルボン酸 （Ｘは水素原子、ハロゲン、低級アルキル基、フエニル
基など） これらの原料化合物から得られる全芳香族ポリエステ
ル化合物の具体例として以下の構造単位を有する重合体
を挙げることができる。(1) Aromatic or aliphatic dihydroxy compounds (X is a hydrogen atom, halogen, lower alkyl group, phenyl group, etc.) (Y is -O -, - CH 2 -, etc.) HO (CH 2) nOH (n is an integer from 2 to 12) (2) Aromatic or aliphatic dicarboxylic acids HOOC (CH 2) nCOOH (n is an integer from 2 to 12) (3) Aromatic hydroxycarboxylic acid (X is a hydrogen atom, halogen, lower alkyl group, phenyl group, etc.) Specific examples of the wholly aromatic polyester compound obtained from these raw material compounds include polymers having the following structural units.
しかし、良好な機械的物性を得るためには、ある程度
の重合度が必要であり、液晶への転移温度より20〜50℃
高い任意の温度における溶融粘度が1000ポイズ以上（剪
断速度100秒-1）であることが好ましい。 However, in order to obtain good mechanical properties, a certain degree of polymerization is required.
It is preferable that the melt viscosity at a high arbitrary temperature is 1000 poise or more (shear rate 100 sec- 1 ).
本発明を図面に従つて説明する。 The present invention will be described with reference to the drawings.
第１図は本発明のダイの断面図である。第２図が従来
のダイの断面図である。インフレーシヨン用のダイはイ
ンナーリツプ１、アウターリツプ２、内部マンドレル
３、ダイ本体４からなり、空気を入れる通気孔７および
ポリマー材料の流量を均一にするためにスパイラルマン
ドレル8a,8bによるところのポリマー流路5a,5bを備えて
いる。従来のダイでは、インナーリツプ１とアウターリ
ツプ２の間に構成されるポリマー流路のダイ出口に至る
最終域であるダイランド部6a,6bは、ダイ内部からダイ
出口に至るまで同じ径であり、数10mmの長さを有してい
る。FIG. 1 is a sectional view of a die of the present invention. FIG. 2 is a sectional view of a conventional die. The die for inflation comprises an inner lip 1, an outer lip 2, an inner mandrel 3, and a die body 4, and a polymer flow through a spiral mandrel 8a, 8b for uniformizing the flow rate of the air hole 7 and the polymer material. Roads 5a and 5b are provided. In the conventional die, the die lands 6a and 6b, which are the final areas of the polymer flow path formed between the inner lip 1 and the outer lip 2 and reach the die exit, have the same diameter from the inside of the die to the die exit, and have a diameter of several tens mm. Has a length of
しかし、本発明のダイにおいてはダイランド部6a,6b
がダイ内部からダイ出口にかけて円錐状に拡大してい
る。第３図に示す如く、ダイランド部6a,6bのダイ開口
部のアウターリツプ２及びインナーリツプ１の口径をそ
れぞれDo,doとし、ダイランド部6a,6bがはじまるアウタ
ーリツプ２の最小内径及びインナーリツプ１の最小外径
をそれぞれDi,diとし、従来ダイの前記口径に該当する
ものをＤ′o,d′o,D′i,d′ｉとする。それらの関係式
は下記の如くなる。However, in the die of the present invention, the die land portions 6a, 6b
Expands conically from the inside of the die to the exit of the die. As shown in FIG. 3, the diameters of the outer lip 2 and the inner lip 1 of the die openings of the die lands 6a and 6b are respectively Do and do, and the minimum inner diameter of the outer lip 2 and the minimum outer diameter of the inner lip 1 where the die lands 6a and 6b start. Are Di, di, respectively, and D'o, d'o, D'i, d'i are those corresponding to the diameter of the conventional die. The relational expressions are as follows.
従来ダイにおいては Ｄ′ｏ≒Ｄ′ｉ ｄ′ｏ≒ｄ′ｉ Ｄ′o/D′ｉ≒ｄ′o/d′ｉ≒１ である。 In the conventional die, D'o ≒ D'id'o'd'i D'o / D'i'd'o / d'i ≒ 1.
しかるに本発明ダイにおいては Do＞Di do＞di Do/Di≧1.2およびdo/di≧1.2の関係を満足している。よ
り好ましい範囲としては 1.5≦Do/Di≦10 1.5≦do/di≦10 である。However, the die of the present invention satisfies the relations Do> Di do> di Do / Di ≧ 1.2 and do / di ≧ 1.2. A more preferred range is 1.5 ≦ Do / Di ≦ 10 1.5 ≦ do / di ≦ 10.
Do/Di＜1.2もしくはdo/di＜1.2ではダイ内部での全芳
香族ポリエステルのTD方向への延伸が充分でなくMD、TD
方向の物性がアンバランスになりやすい。またDo/Diも
しくはdo/diの値が10を越える条件では安定な形成がで
きない場合がある。更に、ダイランド部6a,6bのポリマ
ー流路の間隔について詳しく説明する。従来ダイではダ
イランド部6a、6bのポリマー流路の間隔は一般に一定で
ある。すなわち、Ｄ′ｏ−ｄ′ｏ＝Ｄ′ｉ−ｄ′ｉであ
る。しかし、本発明ダイではDo−do＜Di−diの方がTD方
向への延伸効果をあげる意味で好ましい。更には、 を満足することが望ましい。When Do / Di <1.2 or do / di <1.2, the stretching of the wholly aromatic polyester in the TD direction inside the die is not enough,
The physical properties in the direction tend to be unbalanced. On the other hand, stable formation may not be achieved under the condition that the value of Do / Di or do / di exceeds 10. Further, the distance between the polymer flow paths of the die lands 6a and 6b will be described in detail. In a conventional die, the gap between the polymer flow paths of the die lands 6a and 6b is generally constant. That is, D'o-d'o = D'id-i '. However, in the die of the present invention, Do-do <Di-di is preferred from the viewpoint of increasing the stretching effect in the TD direction. Furthermore, It is desirable to satisfy
本発明に用いられる成形ダイのダイスリツト間隔は0.
1〜1.5mm、より好ましくは0.25〜1.0mmであり、任意の
調節ボルトによつて該間隔の偏心は調整される。本発明
に用いられる全芳香族ポリエステルは、ダイランド部6
a,6bでかかる剪断により分子が容易に配向するので、成
形ダイにかかる圧力の上昇が少ない。従つて成形ダイの
スリツト間隔な一般的熱可塑剤樹脂より狭い方が好適で
ある。The die slit interval of the forming die used in the present invention is 0.
It is 1 to 1.5 mm, more preferably 0.25 to 1.0 mm, and the eccentricity of the interval is adjusted by an optional adjusting bolt. The wholly aromatic polyester used in the present invention has a die land portion 6
Since the molecules are easily oriented by the shearing at a and 6b, the pressure applied to the forming die is small. Therefore, it is preferable that the slit interval of the molding die is smaller than that of a general thermoplastic resin.
インフレーシヨン成形法ではＴダイ法におけるMD方向
及びTD方向の延伸倍率に相当するものとして、ドロー比
及びブロー比が用いられる。ドロー比はMD方向の延伸倍
率、ブロー比はTD方向の延伸倍率に相当し、通常次のよ
うに定義される。In the inflation molding method, a draw ratio and a blow ratio are used as equivalent to the stretching ratio in the MD and TD directions in the T-die method. The draw ratio corresponds to the draw ratio in the MD direction, and the blow ratio corresponds to the draw ratio in the TD direction, and is usually defined as follows.
液晶を形成しない通常のポリエステル樹脂は、本発明
のダイのダイランド部6a,6bにおいて、剪断をかけても
配向しないのでダイ内部からの延伸効果は生じない。そ
れに対して本発明で用いられる全芳香族ポリエステル
は、溶融状態で液晶を形成する特徴を有している、すな
わち成形ダイのダイランド部6a,6bで剪断をかけると配
向することを考慮して、ダイ内部から延伸が開始されて
いると思われ、次の式を定義した。 The ordinary polyester resin that does not form liquid crystal does not orient in the die lands 6a and 6b of the die of the present invention even when subjected to shearing, and therefore does not have the effect of stretching from inside the die. On the other hand, the wholly aromatic polyester used in the present invention has a feature of forming a liquid crystal in a molten state, that is, in consideration of being oriented when shearing is applied to the die lands 6a and 6b of the forming die, It was assumed that the stretching had started from inside the die, and the following equation was defined.
本発明のダイにおいては、（Ｉ）式は見かけのブロー
比を表現しているのに対して（Ｉ）′式は実質的なブロ
ー比を示していると考えられる。すなわち、同じダイ口
径から同じ折り幅のフイルムを得た場合、本発明のダイ
を用いると、より高いブロー比、つまりより高いTD方向
への延伸倍率のフイルムを得ることになり、それにより
成形スピードを上げ、ドロー比を上げてもMD、TD両方向
にバランスのとれたフイルムが得られる。 In the die of the present invention, it is considered that the expression (I) represents an apparent blow ratio, while the expression (I) 'represents a substantial blow ratio. In other words, when a film having the same folding width is obtained from the same die diameter, using the die of the present invention results in obtaining a film having a higher blow ratio, that is, a film having a higher draw ratio in the TD direction. Even if the draw ratio is increased, a film balanced in both MD and TD directions can be obtained.
以下、実施例により本発明を詳しく説明するが、これ
によつて本発明の範囲が限定されるものではない。な
お、各物性は次に示す方法によつて測定した。Hereinafter, the present invention will be described in detail with reference to Examples, but the scope of the present invention is not limited thereto. In addition, each physical property was measured by the method shown below.
液晶への転移温度：示差走査熱量計（メトラー社製TH−
3000）を用いて、20℃／分の速度で昇温し、試料の熱挙
動を観測した時の吸熱ピークの位置によつた。Transition temperature to liquid crystal: differential scanning calorimeter (TH-
The temperature was raised at a rate of 20 ° C./min using the method of (3000), and the position of the endothermic peak when the thermal behavior of the sample was observed was determined.
溶 融 粘 度：液晶への転移温度より20℃高い温度に
おいてキャピログラフPMP−Ｃ（東洋精機製）を用いて
シリンダー9.55φ×250mmL、ノズル1.0φ×10mmLの条件
下でピストン速度を変化させて得た粘度、剪断速度曲線
から剪断速度100秒-1のときの粘度の値を読んだ。Melt viscosity: obtained by changing the piston speed using a Capillograph PMP-C (manufactured by Toyo Seiki) at a temperature of 20 ° C higher than the transition temperature to the liquid crystal under the conditions of a cylinder of 9.55φ × 250mmL and a nozzle of 1.0φ × 10mmL. The viscosity value at a shear rate of 100 sec- 1 was read from the viscosity and shear rate curves.
実施例１ 撹拌機、減圧蒸留装置を取り付けた反応層に４−アセ
トキシ安息香酸9.72kg、テレフタル酸2.99kg、4,4′−
ジアセトキシジフエニル2.43kg、および4,4′−ジアセ
トキシジフエニルエーテル2.57kgを仕込んだ。系内を窒
素ガスで充分置換したのち反応槽の油浴温度を150℃に
加温し撹拌を開始した。Example 1 9.72 kg of 4-acetoxybenzoic acid, 2.99 kg of terephthalic acid, and 4,4′- were added to a reaction layer equipped with a stirrer and a vacuum distillation apparatus.
2.43 kg of diacetoxydiphenyl and 2.57 kg of 4,4'-diacetoxydiphenyl ether were charged. After the inside of the system was sufficiently replaced with nitrogen gas, the oil bath temperature of the reaction tank was heated to 150 ° C., and stirring was started.
撹拌開始後、反応槽の内温を上昇させ１時間かけて22
0℃にし、次いで１時間かけて260℃に昇温し、更に１時
間かけて320℃に昇温し、320℃で10分間保持した。次い
で反応槽の内温を340℃にまで昇温し、反応槽内を徐々
に減圧にし40分かけて50mmHgに到達させた。更に、撹拌
下340℃、5mmHgの条件を10分間保持したのち、系内に窒
素ガスを導入し常圧にもどして反応を停止し、ポリマー
を得た。After the start of the stirring, the internal temperature of the reaction vessel was raised to 22
The temperature was raised to 0 ° C, then raised to 260 ° C over 1 hour, further raised to 320 ° C over 1 hour, and kept at 320 ° C for 10 minutes. Next, the internal temperature of the reactor was raised to 340 ° C., and the pressure inside the reactor was gradually reduced to reach 50 mmHg over 40 minutes. Furthermore, after maintaining the conditions of 340 ° C. and 5 mmHg under stirring for 10 minutes, nitrogen gas was introduced into the system and the pressure was returned to normal pressure to stop the reaction, and a polymer was obtained.
得られたポリマーの溶融粘度は測定温度310℃、剪断
速度100秒-1の条件下で1500ポイズであつた。該ポリマ
ーを140℃で５時間熱風乾燥し、水分率を70ppmまで減少
させ形成に供した。The melt viscosity of the obtained polymer was 1500 poise under the conditions of a measurement temperature of 310 ° C. and a shear rate of 100 seconds −1 . The polymer was dried with hot air at 140 ° C. for 5 hours to reduce the water content to 70 ppm and used for formation.
290〜310℃に加熱した40φ押出機で溶融混練し、300℃
に加熱したダイスリット間隔0.5mmφ、Do＝40mmφ、Di
＝20mmφのインフレーションダイより吐出量9kg/時で溶
融押上しし、ドロー比＝5.2、見かけのブロー比＝3.2
（実質的ブロー比＝6.4）の条件で延伸し、厚み30μｍ
の外観良好なフイルムを得た。Melt and knead with a 40φ extruder heated to 290-310 ° C, 300 ° C
Heated die slit interval 0.5mmφ, Do = 40mmφ, Di
= 20mmφ inflation die melts up at a discharge rate of 9kg / hour, draw ratio = 5.2, apparent blow ratio = 3.2
(Substantial blow ratio = 6.4)
A film having a good appearance was obtained.
得られたフイルムの物性を表１に示したが、MD、TD両
方向にバランスのとれた機械物性を有していた。The physical properties of the obtained film are shown in Table 1. The mechanical properties were well balanced in both MD and TD directions.
実施例２ 実施例１で用いられた反応槽にｐ−アセトキシ安息香
酸9.45kgおよび６−アセトキシ−２−ナフトエ酸4.02kg
仕込み、系内を窒素ガスで充分置換したのち窒素ガスを
流しながら反応槽を250℃に加温した。250℃で３時間次
に280℃で１時間15分撹拌した。更に重合温度を320℃に
上昇させ、その温度で25分保持した後、徐々に減圧し0.
1〜0.2mmHg、320℃の条件で26分間維持した後系内を常
圧にもどし、ポリマーを得た。Example 2 The reaction vessel used in Example 1 was charged with 9.45 kg of p-acetoxybenzoic acid and 4.02 kg of 6-acetoxy-2-naphthoic acid.
After charging and thoroughly replacing the inside of the system with nitrogen gas, the reaction vessel was heated to 250 ° C. while flowing nitrogen gas. The mixture was stirred at 250 ° C for 3 hours and then at 280 ° C for 1 hour and 15 minutes. The polymerization temperature was further increased to 320 ° C., and the temperature was maintained for 25 minutes.
After maintaining at 1 to 0.2 mmHg and 320 ° C. for 26 minutes, the inside of the system was returned to normal pressure to obtain a polymer.
得られたポリマーの溶融粘度は、測定温度300℃剪断
速度100秒-1の条件で3,000ポイズであつた。The melt viscosity of the obtained polymer was 3,000 poise at a measurement temperature of 300 ° C. and a shear rate of 100 seconds −1 .
該ポリマーを用いて実施例１と同じ押出機およびイン
フレーションダイを使用して、280〜300℃の加熱条件下
でドロー比＝5.2、見かけのブロー比＝3.2（実質的ブロ
ー比＝6.4）と実施例１と同一成形条件にて厚み30μｍ
の外観良好なフイルムを得た。得られたフイルムはバラ
ンスのとれた物性を有していた。Using the same extruder and inflation die as in Example 1 using the polymer, under the heating conditions of 280 to 300 ° C., a draw ratio = 5.2, an apparent blow ratio = 3.2 (substantial blow ratio = 6.4). 30 μm thickness under the same molding conditions as in Example 1
A film having a good appearance was obtained. The obtained film had well-balanced physical properties.
比較例１、２ 成形ダイとしてDo＝Di＝40mmφの一般的なダイを用い
た他は、実施例１、２で用いたポリマーをそれぞれ同じ
条件でフイルム成形した結果を表１に示す。MD方向に比
較して、TD方向の物性が劣っている。Comparative Examples 1 and 2 Table 1 shows the results of film-forming the polymers used in Examples 1 and 2 under the same conditions, except that a general die of Do = Di = 40 mmφ was used as the molding die. Physical properties in the TD direction are inferior to those in the MD direction.
〔発明の効果〕 本発明の成形ダイを用いて、光学的異方性を有する全
芳香族ポリエステルを製膜すると、成形速度を上げて
も、機械軸方向およびそれと直角な方向の両方向にバラ
ンスのとれた機械的物性を有するフイルムを製造するこ
とができる。 [Effects of the Invention] When a film of a wholly aromatic polyester having optical anisotropy is formed using the molding die of the present invention, even when the molding speed is increased, the balance in both the machine axis direction and the direction perpendicular thereto is achieved. A film having excellent mechanical properties can be manufactured.
第１図は本発明のインフレーシヨン用成形ダイの断面図
であり、第２図は従来のインフレーシヨン用成形ダイの
断面図である。又、第３図は第１図の成形ダイのダイ開
口部の拡大断面図である。 1.インナーリツプ 2.アウターリツプ 3.内部マンドレル 4.ダイ本体 5a,5b……ポリマー流路 6a,6b……ダイランド部 7.空気通気孔 8a,8b……スパイラルマンドレルFIG. 1 is a sectional view of a molding die for inflation according to the present invention, and FIG. 2 is a sectional view of a conventional molding die for inflation. FIG. 3 is an enlarged sectional view of a die opening of the forming die shown in FIG. 1.Inner lip 2.Outer lip 3.Inner mandrel 4.Die body 5a, 5b …… Polymer channel 6a, 6b …… Die land 7. Air vent 8a, 8b …… Spiral mandrel
Claims (1)
のランド部が、ダイ内部から出口にかけてその口径が1.
2倍以上円錐状に拡大された構造を有するダイを用いる
ことを特徴とする全芳香族ポリエステルフィルムの製造
方法。(1) A land portion of a ring die in inflation molding has a diameter of 1. from the inside of the die to an exit.
A method for producing a wholly aromatic polyester film, comprising using a die having a structure enlarged in a conical shape at least twice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63242128A JP2635383B2 (en) | 1988-09-26 | 1988-09-26 | Method for producing wholly aromatic polyester film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63242128A JP2635383B2 (en) | 1988-09-26 | 1988-09-26 | Method for producing wholly aromatic polyester film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0288212A JPH0288212A (en) | 1990-03-28 |
| JP2635383B2 true JP2635383B2 (en) | 1997-07-30 |
Family
ID=17084721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63242128A Expired - Lifetime JP2635383B2 (en) | 1988-09-26 | 1988-09-26 | Method for producing wholly aromatic polyester film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2635383B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0711956Y2 (en) * | 1992-02-26 | 1995-03-22 | 株式会社三葉製作所 | Extruder die |
| JP2001162670A (en) * | 1999-12-13 | 2001-06-19 | Sumitomo Chem Co Ltd | Extrusion machine and method for extrusion molding |
| JP3914961B2 (en) | 2005-08-18 | 2007-05-16 | 日立マクセル株式会社 | Method for manufacturing molded product, extrusion molding apparatus and molded product |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE430670B (en) * | 1982-06-04 | 1983-12-05 | Marie Iacconi | PROCEDURE FOR MANUFACTURING PLASTIC PRODUCTS AND NOZZLES FOR EXTRUDES FOR MANUFACTURE OF HOSE-SHAPED PRODUCT |
-
1988
- 1988-09-26 JP JP63242128A patent/JP2635383B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0288212A (en) | 1990-03-28 |
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