JP2000233442A - Production of biaxially stretched film - Google Patents
Production of biaxially stretched filmInfo
- Publication number
- JP2000233442A JP2000233442A JP3853399A JP3853399A JP2000233442A JP 2000233442 A JP2000233442 A JP 2000233442A JP 3853399 A JP3853399 A JP 3853399A JP 3853399 A JP3853399 A JP 3853399A JP 2000233442 A JP2000233442 A JP 2000233442A
- Authority
- JP
- Japan
- Prior art keywords
- hot water
- film
- biaxially stretched
- water tank
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、二軸延伸熱可塑性
樹脂フィルムを安定して製造する方法を提供しようとす
るものであり、さらに詳しくは、延伸時の切断等の発生
がなく、長時間安定して二軸延伸フィルムを製造する方
法に関するものである。BACKGROUND OF THE INVENTION The present invention aims to provide a method for stably producing a biaxially stretched thermoplastic resin film. The present invention relates to a method for stably producing a biaxially stretched film.
【０００２】[0002]
【従来の技術】食品、医薬品、雑貨等の包装には、フラ
ット式同時二軸延伸法、フラット式逐次二軸延伸法、チ
ューブラ延伸法等を用いて製造した高強度の二軸延伸熱
可塑性樹脂フィルムとヒートシール可能なフィルムをラ
ミネートした積層フィルムからなる包装袋が大量に使用
されている。特に、二軸延伸熱可塑性樹脂フィルムとし
ては、透明性、引張強度、耐ピンホール性、寸法安定性
などの性能に優れたナイロンフィルムやポリエチレンテ
レフタレート（ＰＥＴ）フィルムが幅広く用いられてい
る。2. Description of the Related Art High-strength biaxially stretched thermoplastic resin manufactured by using a flat simultaneous biaxial stretching method, a flat sequential biaxial stretching method, a tubular stretching method, etc., is used for packaging foods, pharmaceuticals, miscellaneous goods and the like. 2. Description of the Related Art Packaging bags made of a laminated film obtained by laminating a film and a heat-sealable film are used in large quantities. In particular, nylon films and polyethylene terephthalate (PET) films having excellent properties such as transparency, tensile strength, pinhole resistance and dimensional stability are widely used as biaxially stretched thermoplastic resin films.
【０００３】フラット式同時二軸延伸法は、フラット式
逐次二軸延伸法に比べて、二軸延伸フィルムの縦方向お
よび横方向の熱収縮率の均一性が優れ、また、フィルム
の厚みの均一性の点でチューブラ延伸法よりも優れてい
る。[0003] The flat simultaneous biaxial stretching method is superior in the uniformity of the heat shrinkage in the longitudinal and transverse directions of the biaxially stretched film and the uniformity of the film thickness, as compared with the flat sequential biaxial stretching method. It is superior to the tubular stretching method in terms of properties.
【０００４】しかし、フラット式同時二軸延伸法は、特
にフラット式逐次二軸延伸法と比べて延伸工程の機構が
複雑なため、延伸工程におけるフィルムの切断が発生し
やすい。特に、ポリアミド樹脂やＰＥＴ樹脂などの結晶
性の高い樹脂を用いて二軸延伸フィルムを製造する場合
には、延伸時にフィルムが切断して操業性に支障をきた
すという問題がある。そこで、未延伸シートを延伸する
前に、温水槽中で調湿処理を行うことにより、適度に可
塑化して結晶化を抑制して延伸する方法が知られてい
る。しかし、上記のような未延伸シートの調湿処理を行
った場合には、長時間の運転中に温水槽中の循環水が汚
染されて異物等が混入する場合があり、さらには、温水
槽の汚染によりフィルムが切断して生産性を著しく低下
させるという問題があった。[0004] However, the flat simultaneous biaxial stretching method is more complicated than the flat sequential biaxial stretching method in particular, and the mechanism of the stretching step is more complicated, so that the film is likely to be cut in the stretching step. In particular, when a biaxially stretched film is manufactured using a resin having high crystallinity such as a polyamide resin or a PET resin, there is a problem that the film is cut at the time of stretching and hinders operability. Therefore, there is known a method in which a non-stretched sheet is stretched by performing a humidity control treatment in a warm water bath before stretching to moderately plasticize and suppress crystallization. However, when the humidity control of the unstretched sheet as described above is performed, the circulating water in the hot water tank may be contaminated during the operation for a long time and foreign substances may be mixed therein. There is a problem that the film is cut due to the contamination of the film and the productivity is remarkably reduced.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、上記のよう
なフラット式同時二軸延伸法を用いた場合の、熱可塑性
樹脂フィルムの延伸工程におけるフィルムの切断の発生
を防止し、生産性を改善する方法を提供しようとするも
のである。SUMMARY OF THE INVENTION The present invention prevents the occurrence of film cutting in the stretching step of a thermoplastic resin film when the flat simultaneous biaxial stretching method as described above is used, and improves productivity. It seeks to provide a way to improve.
【０００６】[0006]
【課題を解決するための手段】本発明者らは、鋭意検討
した結果、未延伸シートを延伸する前の調湿処理を行う
ための温水のクリーン度を高めることにより、フィルム
の切断の発生を顕著に防止することができることを見出
し、本発明に到達した。Means for Solving the Problems The inventors of the present invention have conducted intensive studies and as a result, by increasing the cleanness of hot water for performing a humidity control process before stretching an unstretched sheet, the occurrence of film breakage has been reduced. They have found that they can be significantly prevented, and have reached the present invention.
【０００７】すなわち、本発明の要旨は、熱可塑性樹脂
を押出機を用いて、Ｔダイのリップ間隙よりシート状に
溶融押出し、冷却ドラム上に密着させて急冷して得られ
た未延伸シートを温水槽中で調湿処理を行った後、縦お
よび横方向に同時二軸延伸することにより、二軸延伸熱
可塑性樹脂フィルムを製造する方法において、温水の循
環系にフィルタを設置して温水槽のクリーン度を高めた
状態で生産することを特徴とする二軸延伸フィルムの製
造方法にある。That is, the gist of the present invention is that an unstretched sheet obtained by melt-extruding a thermoplastic resin into a sheet from the lip gap of a T-die by using an extruder, bringing the thermoplastic resin into close contact with a cooling drum, and quenching is obtained. In the method of manufacturing a biaxially stretched thermoplastic resin film by performing biaxial stretching in the vertical and horizontal directions after performing a humidity control treatment in a hot water tank, a filter is installed in a circulation system of the hot water to form a hot water tank. A method for producing a biaxially stretched film, characterized in that the film is produced in a state in which the degree of cleanness is increased.
【０００８】[0008]
【発明の実施の形態】以下、本発明について詳細に説明
する。本発明において用いられる熱可塑性樹脂として
は、たとえば、ナイロン６、ナイロン６１０、ナイロン
１１、ナイロン１２、ポリメタキシリレンアジパミドな
どのポリアミド樹脂や、ＰＥＴ、ポリブチレンテレフタ
レート、ポリエチレンナフタレート、ポリブチレンナフ
タレートなどのポリエステル、あるいは、ポリオレフィ
ン樹脂、ポリビニルアルコール、エチレン・ビニルアル
コール共重合体などが挙げられる。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. Examples of the thermoplastic resin used in the present invention include polyamide resins such as nylon 6, nylon 610, nylon 11, nylon 12, and polymethaxylylene adipamide; PET, polybutylene terephthalate, polyethylene naphthalate, and polybutylene naphthalene. Examples include polyester such as phthalate, or polyolefin resin, polyvinyl alcohol, and ethylene / vinyl alcohol copolymer.
【０００９】本発明においては、温水の循環系にフィル
タを設置することにより、未延伸シートを延伸する前の
調湿処理を行うための温水槽中への異物の混入を防止し
て温水のクリーン度を維持することが必要である。すな
わち、温水槽のクリーン度が維持されない場合には、長
時間にわたって同時二軸延伸フィルムを製造した場合、
未延伸シートの表面に付着したゴミやポリエステルオリ
ゴマーなどの異物が温水槽中に混入し、このような異物
がフィルムの表面に付着してフィルムに傷が発生する原
因となり、製造工程中でフィルムが切断したり、温水槽
中のフィルムに部分的なぬめり現象が生じて、温水槽中
のロールとの間の摩擦力に差が生じ、フィルムの蛇行や
シワが発生する。In the present invention, by installing a filter in the circulation system of hot water, it is possible to prevent foreign substances from being mixed into the hot water tank for performing humidity control before stretching the unstretched sheet, and to clean the hot water. It is necessary to maintain the degree. That is, when the cleanliness of the hot water tank is not maintained, when a simultaneous biaxially stretched film is manufactured for a long time,
Foreign matter, such as dust and polyester oligomer, adhering to the surface of the unstretched sheet enters the hot water tank, and such foreign matter adheres to the surface of the film, causing damage to the film. Cutting or partial slimming of the film in the hot water tank causes a difference in frictional force between the film and the rolls in the hot water tank, thereby causing meandering and wrinkling of the film.
【００１０】本発明において用いられるフィルタの材質
は特に限定されず、たとえば、ポリエステル繊維を束ね
たものなどが好適に用いられ、また、濾過精度は１μｍ
以下程度であることが好ましい。The material of the filter used in the present invention is not particularly limited. For example, a material obtained by bundling polyester fibers is preferably used, and the filtration accuracy is 1 μm.
It is preferable that it is about the following.
【００１１】また、本発明においては、温水槽中に循環
する温水の入口を、温水槽中の底部に設けることによ
り、温水槽中の温水のクリーン度を均一に保つことがで
きる。In the present invention, the cleanliness of the hot water in the hot water tank can be kept uniform by providing the inlet of the hot water circulating in the hot water tank at the bottom of the hot water tank.
【００１２】本発明の方法を用いて複層構成の積層フィ
ルムを製造することもできる。その場合には、各層を構
成する樹脂を別々の押出機を用いて溶融し、フィードブ
ロック法により重ね合わせた後、Ｔダイより押し出す方
法や、溶融した数種の樹脂をマルチマニホールドダイス
中で重ね合わせた後、押し出す方法、およびその組み合
わせによる方法などを用いることができる。The method of the present invention can be used to produce a laminated film having a multilayer structure. In that case, the resin constituting each layer is melted using a separate extruder, and then superimposed by a feed block method, and then extruded from a T-die, or several types of molten resin are superimposed in a multi-manifold die. After the combination, a method of extruding, a method of a combination thereof, or the like can be used.
【００１３】本発明における二軸延伸フィルムの厚みは
特に制限されないが、通常９〜２５μｍ程度である。The thickness of the biaxially stretched film in the present invention is not particularly limited, but is usually about 9 to 25 μm.
【００１４】次に、本発明の方法を用いて二軸延伸ポリ
アミドフィルムを製造する方法を工程順に説明する。ま
ず、押出機にて、ポリアミド樹脂を溶融したのち、未延
伸シートとしてＴダイより押し出し、表面温度０〜２５
℃に温調した冷却ドラム上に密着させて急冷し、未延伸
シートを得る。冷却ドラムの表面温度が０℃より低いと
冷却ドラム上への露結水が発生し、２５℃より高いと冷
却不十分となる。この工程においては、溶融した未延伸
シートをできるだけ短時間に冷却することが必要であ
り、冷却ドラム上に密着させる方法としては、エアーノ
ズル製膜法（ＡＮＣ法）、エアーナイフ製膜法（ＡＫＣ
法）、ピニング製膜法（ＰＮＣ法）などが知られてい
る。Next, a method for producing a biaxially stretched polyamide film using the method of the present invention will be described in the order of steps. First, after the polyamide resin is melted by an extruder, it is extruded from a T-die as an unstretched sheet, and the surface temperature is 0 to 25.
The mixture is brought into close contact with a cooling drum adjusted to a temperature of ° C. and rapidly cooled to obtain an unstretched sheet. When the surface temperature of the cooling drum is lower than 0 ° C., dew condensation occurs on the cooling drum, and when the surface temperature is higher than 25 ° C., the cooling becomes insufficient. In this step, it is necessary to cool the melted unstretched sheet in as short a time as possible. As a method of bringing the sheet into close contact with the cooling drum, an air nozzle film forming method (ANC method) and an air knife film forming method (AKC method)
Method), a pinning film forming method (PNC method), and the like.
【００１５】ＡＮＣ法は、フィルムの端部をエアーノズ
ルからのエアーで冷却ドラム上に密着させる方法であ
り、設備が簡易で操業管理も平易であるが、冷却速度は
やや遅い。ＡＫＣ法は、フィルムの全幅にわたり、スリ
ットノズル（エアーナイフ）からのエアーで冷却ドラム
上に密着させる方法であり、適用できる熱可塑性樹脂の
種類に制約がなく、冷却速度が速く高速製膜が可能であ
るが、操業管理が難しい。ＰＮＣ法は、ワイヤーをフィ
ルム上に張り、これに数千ボルトの高電圧を印加し、ア
ースされた冷却ドラム上に密着させる方法であり、冷却
速度は最も速いが、適用できる熱可塑性樹脂の種類に制
約があり、操業管理の難度もやや高い。The ANC method is a method in which the end of a film is brought into close contact with a cooling drum with air from an air nozzle, and the equipment is simple and operation management is easy, but the cooling rate is somewhat slow. The AKC method is a method in which air from a slit nozzle (air knife) is used to adhere to the cooling drum over the entire width of the film. There is no restriction on the type of thermoplastic resin that can be used, and the cooling rate is high and high-speed film formation is possible. However, operation management is difficult. The PNC method is a method in which a wire is stretched on a film, a high voltage of several thousand volts is applied to the film, and the wire is closely adhered to a grounded cooling drum. And operation management is somewhat difficult.
【００１６】得られた未延伸シートを通常２０〜８０℃
に温調した温水槽に送り、１０分間以下の調湿処理を施
す。温水槽の温度が２０℃より低いと調湿処理が不十分
となり、８０℃より高いと調湿効果が飽和するばかり
か、かえって経済性を損ねる。The obtained unstretched sheet is usually kept at 20 to 80 ° C.
And sent to a hot water tank whose temperature has been adjusted for 10 minutes or less. If the temperature of the hot water tank is lower than 20 ° C., the humidity control becomes insufficient. If the temperature is higher than 80 ° C., not only the humidity control effect is saturated but also the economic efficiency is impaired.
【００１７】次に、未延伸シートの端部を、フラット式
同時二軸延伸機のクリップに把持させ、ガラス転位点
（Ｔｇ）〜〔融点（Ｔｍ）−１５〕℃の温度で、延伸倍
率として縦横それぞれ２．０〜４．０倍に同時二軸延伸
した後、横方向の弛緩率を２〜８％として、Ｔｇ＋５０
〜Ｔｍ−１０℃で１〜１０秒間の熱処理を施し、二軸延
伸フィルムとする。Next, the end of the unstretched sheet is gripped by a clip of a flat type simultaneous biaxial stretching machine, and the stretching ratio is determined at a temperature of glass transition point (Tg) to [melting point (Tm) -15] ° C. After simultaneous biaxial stretching in the longitudinal and transverse directions of 2.0 to 4.0 times, the relaxation rate in the transverse direction is set to 2 to 8%, and Tg + 50.
Heat treatment for 1 to 10 seconds at ~ Tm-10 ° C to give a biaxially stretched film.
【００１８】その後、延伸フィルムを冷却して巻取機で
６０〜２００ｍ／ｍｉｎの速度で巻取り、ついで、得ら
れた原反ロールをスリットし、製品ロールとする。Thereafter, the stretched film is cooled and wound up by a winder at a speed of 60 to 200 m / min. Then, the obtained raw roll is slit into a product roll.
【００１９】[0019]
【実施例】次に、実施例により本発明を具体的に説明す
る。なお、測定法および評価法は次の方法によった。 （１）ナイロン樹脂の相対粘度 ９６％濃硫酸溶媒中、濃度１．０ｇ／ｄｌ、２５℃で測
定した溶液粘度から求めた。 （２）操業性 １週間の連続生産を行い、その間に、温水槽の温水の汚
染に起因する切断回数を測定し、切断回数５回以下を合
格とした。 （３）引張強伸度 ＡＳＴＭ Ｄ８８２の測定法に準じて試料幅１０ｍｍ、
試料長１０ｃｍの試料を用いて測定した。 （４）乾熱収縮率 試料幅１０ｍｍ、試料長１０ｃｍの試料を１６０℃雰囲
気下に１５分間処理した。処理前後の寸法変化を測定
し、原長に対する百分率で求めた。 （５）ヘーズ ＪＩＳ Ｋ７１０５に準拠し、東京電色社製全自動ヘー
ズメータ（ＴＣ−ＨＤＰＫ）を使用してフィルムのヘー
ズを測定した。 ヘーズ（％）＝（拡散透過率／全光線透過率）×１００ （６）耐ピンホール性 ＭＩＬ−Ｂ１３１Ｆに示されるＦｅｄ．Ｔｅｓｔ Ｍｅ
ｔｈｏｄ Ｓｔｄ．１０１ＣのＭｅｔｈｏｄ２０１７に
従い、１２インチ×８インチのサンプルを直径３．５イ
ンチの円筒状とし、両端を把持し、初期把持間隔７イン
チ、最大屈曲時の把持間隔を１インチ、４０回／分の速
さで、いわゆるゲルボテスター（理学工業社製）によ
り、５℃下での１０００回屈曲を加えた後のフィルムに
生じるピンホール個数を測定した。Next, the present invention will be described in detail with reference to examples. In addition, the measuring method and the evaluation method used the following method. (1) Relative viscosity of nylon resin Determined from the solution viscosity measured at 25 ° C. at a concentration of 1.0 g / dl in 96% concentrated sulfuric acid solvent. (2) Operability One week of continuous production was performed. During this period, the number of cuts due to contamination of the hot water in the hot water tank was measured, and the number of cuts of 5 or less was judged to be acceptable. (3) Tensile strength and elongation A sample width of 10 mm according to the measurement method of ASTM D882,
The measurement was performed using a sample having a sample length of 10 cm. (4) Dry Heat Shrinkage A sample having a sample width of 10 mm and a sample length of 10 cm was treated in a 160 ° C. atmosphere for 15 minutes. The dimensional change before and after the treatment was measured and determined as a percentage of the original length. (5) Haze According to JIS K7105, the haze of the film was measured using a fully automatic haze meter (TC-HDPK) manufactured by Tokyo Denshoku Co., Ltd. Haze (%) = (diffuse transmittance / total light transmittance) × 100 (6) Pinhole resistance Fed. Test Me
third, Std. According to Method 2017 of 101C, a sample of 12 inches × 8 inches is formed into a cylindrical shape having a diameter of 3.5 inches, the both ends are gripped, the initial grip interval is 7 inches, the grip interval at the maximum bending is 1 inch, and the speed is 40 times / min. The number of pinholes formed in the film after bending 1000 times at 5 ° C. was measured using a so-called gel botester (manufactured by Rigaku Corporation).
【００２０】実施例１ Ｔダイを用いて、押出機よりユニチカ社製ナイロン６
（Ａ１０３０ＢＲＦ）を温度２３５℃で溶融し、未延伸
シートとして押し出し、表面温度１５℃に温調した冷却
ドラム上にＡＮＣ方式で密着させて冷却し、厚み１５０
μｍの未延伸シートを得た。得られたシートを７０℃に
温調した温水槽に送り、１分間の調湿処理を施した。温
水槽の循環系にはポリエステル繊維で作られたメッシュ
１μｍのフィルタを設置し、温水槽の最下部に循環水の
供給口を設けた。次に、このシートの端部を８５℃に制
御したフラット式同時二軸延伸機のクリップに把持さ
せ、温度１９５℃で、延伸倍率として縦３．０倍、横
３．３倍に同時二軸延伸した後、横方向の弛緩率を５％
として、２００℃で３秒間の熱処理を施した後、フィル
ムを冷却して１６５ｍ／ｍｉｎの速度で巻取機で巻取
り、厚み１５μｍの延伸フィルムを得た。１週間の連続
生産において、延伸切断はなく、操業性は極めて良好で
あった。得られた延伸フィルムの原反ロールをスリット
し、各種性能を評価した結果を表１に示した。表１に示
したように、優れた性能を有していた。Example 1 Using a T-die, nylon 6 manufactured by Unitika Ltd. was extruded from an extruder.
(A1030BRF) was melted at a temperature of 235 ° C., extruded as an unstretched sheet, and cooled in close contact with a cooling drum adjusted to a surface temperature of 15 ° C. by an ANC method to a thickness of 150 ° C.
A μm unstretched sheet was obtained. The obtained sheet was sent to a hot water tank whose temperature was controlled at 70 ° C., and subjected to a humidity control treatment for 1 minute. A 1 μm mesh filter made of polyester fiber was installed in the circulation system of the hot water tank, and a circulating water supply port was provided at the bottom of the hot water tank. Next, the end of this sheet was gripped by a clip of a flat simultaneous biaxial stretching machine controlled at 85 ° C., and at a temperature of 195 ° C., a stretching ratio of 3.0 times and a width of 3.3 times at the same time. After stretching, the transverse relaxation rate is 5%
After performing a heat treatment at 200 ° C. for 3 seconds, the film was cooled and wound up by a winder at a speed of 165 m / min to obtain a stretched film having a thickness of 15 μm. In one week of continuous production, there was no stretch cutting, and the operability was extremely good. The raw film roll of the obtained stretched film was slit, and the results of evaluating various performances are shown in Table 1. As shown in Table 1, it had excellent performance.
【００２１】実施例２ ３種５層共押出Ｔダイを用いて、押出機１より、ユニチ
カ社製ナイロン６（Ａ１０３０ＢＲＦ）９８重量％に、
変性ポリオレフィン（日本ポリオレフィン社製アドテッ
クスＥＴ１８３Ｂ）を２重量％混合したものを温度２５
０℃で溶融押出し（層Ａ）、押出機２より、ＭＸＤ６
（三菱ガス化学社製、ＭＸナイロン６００７、相対粘度
２．６４）９８．５重量％に、上記変性ポリオレフィン
を１．３重量％、タルク（林化成社製ＵＰＮＨＳ−Ｔ
０．５）を０．２重量％を混合したものを温度２６５℃
で溶融押出し（層Ｂ）、押出機３より、上記ナイロン６
を３０重量％とアモルファスナイロン（ＥＭＳ社製グリ
ボリーＸＥ３０３８）を７０重量％混合したものを温度
２８０℃で溶融押出し（層Ｃ）、Ａ／Ｃ／Ｂ／Ｃ／Ａの
順に積層した多層未延伸シートをＴダイより押し出し、
表面温度１８℃に温調した冷却ドラム上に、ＡＫＣ方式
により密着させて急冷し、Ａ／Ｃ／Ｂ／Ｃ／Ａ＝４５／
５／５０／５／４５（μｍ）の構成の厚み１５０μｍの
未延伸多層シートを得た。得られたシートを５０℃に温
調した温水槽に送り、１分間の調湿処理を施した。温水
槽の循環系にはポリエステル繊維で作られたメッシュ１
μｍのフィルタを設置し、温水槽の最下部に循環水の供
給口を設けた。次に、このシートの端部を８５℃に制御
したフラット式同時二軸延伸機のクリップに把持させ、
温度１８０℃で、延伸倍率として縦３．０倍、横３．３
倍に同時二軸延伸した後、横方向の弛緩率を５％とし
て、２１０℃で４秒間の熱処理を施した後、フィルムを
冷却して１１０ｍ／ｍｉｎの速度で巻取機で巻取り、各
層の厚さが、それぞれ、Ａ／Ｃ／Ｂ／Ｃ／Ａ＝４．５／
０．５／５．０／０．５／４．５（μｍ）、総厚み１５
μｍの多層延伸フィルムを得た。１週間の連続生産にお
いて、延伸切断は３回であり、操業性は良好であった。Example 2 Using extruder 1 using a three-type five-layer coextrusion T-die, 98 wt% of nylon 6 (A1030BRF) manufactured by Unitika Ltd.
A mixture of 2% by weight of a modified polyolefin (Adtex ET183B manufactured by Japan Polyolefin Co., Ltd.) was mixed at a temperature of 25%.
The mixture was melt-extruded at 0 ° C. (layer A).
(Mitsubishi Gas Chemical Company, MX nylon 6007, relative viscosity 2.64) 98.5% by weight, 1.3% by weight of the above modified polyolefin, talc (UPNHS-T manufactured by Hayashi Kasei Co., Ltd.)
0.5) at a temperature of 265 ° C.
And melt extruded (layer B).
Of a mixture of 30% by weight and 70% by weight of amorphous nylon (Grivory XE3038 manufactured by EMS) is melt-extruded at a temperature of 280 ° C. (layer C) and laminated in the order of A / C / B / C / A. Extruded from the T die,
On a cooling drum adjusted to a surface temperature of 18 ° C., it was closely cooled by an AKC method and rapidly cooled, and A / C / B / C / A = 45 /
An unstretched multilayer sheet having a thickness of 150 μm and a configuration of 5/50/5/45 (μm) was obtained. The obtained sheet was sent to a hot water tank whose temperature was controlled at 50 ° C., and subjected to a humidity control treatment for 1 minute. The mesh 1 made of polyester fiber is used for the circulation system of the hot water tank.
A μm filter was installed, and a circulating water supply port was provided at the bottom of the hot water tank. Next, the end of this sheet was gripped by a clip of a flat simultaneous biaxial stretching machine controlled at 85 ° C.
At a temperature of 180 ° C., the draw ratio is 3.0 times in length and 3.3 times in width.
After simultaneous biaxial stretching, the film was subjected to a heat treatment at 210 ° C. for 4 seconds at a relaxation rate of 5% in the transverse direction, and then the film was cooled. Are A / C / B / C / A = 4.5 /
0.5 / 5.0 / 0.5 / 4.5 (μm), total thickness 15
A μm multilayer stretched film was obtained. In one week of continuous production, the stretching was cut three times, and the operability was good.
【００２２】実施例３ 公知の方法で得たエステル化反応率が９５％のビス（β
−ヒドロキシエトキシ）テレフタレートおよびその低重
合体を重合缶に移送し、三酸化アンチモン触媒を、全酸
成分１モルに対し２×１０-4モルとなる量を添加したの
ち、１．３ｈＰａ以下の減圧下に温度２８０℃で所望の
粘度まで重合し、ＰＥＴを合成した。得られたＰＥＴを
押出機より２８０℃でＴダイを用いて溶融押出し、ＰＮ
Ｃ方式により、ピニングワイヤーに７ｋｖの電圧を印加
し、溶融シートを表面温度１８℃に温調したキャストロ
ール上に密着させて急冷することにより、放電やピニン
グ泡が発生することなく、操業性よく高品質の厚み１２
０μｍの未延伸シートを得た。得られたシートを５０℃
に温調した温水槽に送り、１分間の調湿処理を施した。
温水槽の循環系にはポリエステル繊維で作られたメッシ
ュ１μｍのフィルタを設置し、温水槽の最下部に循環水
の供給口を設けた。得られたシートを、８５℃に制御し
たフラット式同時二軸延伸機のクリップに把持させ、温
度８０℃で、延伸倍率として縦３．０倍、横３．３倍に
同時二軸延伸した後、横方向の弛弛率を５％として、２
４０℃で４秒間の熱処理を施した後、フィルムを冷却し
て１３０ｍ／ｍｉｎの速度で巻取機で巻き取り、厚さが
１２12μｍの延伸フィルムを得た。１週間の連続生産に
おいて、延伸切断は１回であり、操業性は良好であっ
た。得られた延伸フィルムの原反ロールをスリットし、
各種性能を評価した結果を表１に示した。表１に示した
ように、優れた性能を有していた。Example 3 Bis (β obtained by a known method and having an esterification reaction rate of 95%
-Hydroxyethoxy) terephthalate and its low polymer were transferred to a polymerization vessel, and an antimony trioxide catalyst was added in an amount of 2 × 10 -4 mol per 1 mol of all acid components, and then the pressure was reduced to 1.3 hPa or less. Polymerization was performed at a temperature of 280 ° C. to a desired viscosity to synthesize PET. The obtained PET was melt-extruded from an extruder at 280 ° C. using a T die, and PN was extruded.
By applying a voltage of 7 kv to the pinning wire by the C method, the molten sheet is brought into close contact with a cast roll adjusted to a surface temperature of 18 ° C. and rapidly cooled, so that discharge and pinning bubbles do not occur, thereby improving operability. High quality thickness 12
An unstretched sheet of 0 μm was obtained. The obtained sheet is heated at 50 ° C.
Was sent to a hot water tank whose temperature had been adjusted to 1 mm, and subjected to a humidity control treatment for 1 minute.
A 1 μm mesh filter made of polyester fiber was installed in the circulation system of the hot water tank, and a circulating water supply port was provided at the bottom of the hot water tank. The obtained sheet was gripped by clips of a flat type simultaneous biaxial stretching machine controlled at 85 ° C., and simultaneously biaxially stretched at a temperature of 80 ° C. to a stretching ratio of 3.0 times in length and 3.3 times in width. , With a lateral relaxation rate of 5%, 2
After heat treatment at 40 ° C. for 4 seconds, the film was cooled and wound up by a winder at a speed of 130 m / min to obtain a stretched film having a thickness of 1212 μm. In the continuous production for one week, the stretching was cut once and the operability was good. Slit the raw film roll of the obtained stretched film,
Table 1 shows the results of evaluating various performances. As shown in Table 1, it had excellent performance.
【００２３】比較例１〜３ 温水槽の循環系にフィルタを設置せずに生産した他は、
実施例１と同様の方法で二軸延伸ナイロン６フィルムを
製造した。操業性および各種性能を評価した結果を表１
に示した。延伸切断が多発して、操業性は不良であっ
た。Comparative Examples 1 to 3 Except for producing without installing a filter in the circulation system of the hot water tank,
A biaxially stretched nylon 6 film was produced in the same manner as in Example 1. Table 1 shows the results of evaluating operability and various performances.
It was shown to. Stretch cutting frequently occurred, and the operability was poor.
【００２４】[0024]
【表１】 [Table 1]
【００２５】[0025]
【発明の効果】本発明の方法を用いることにより、フラ
ット式同時二軸延伸法を用いた場合の熱可塑性樹脂フィ
ルムの延伸工程におけるフィルム切断の発生やフィルム
の蛇行が防止され、また、シワのない優れた品質の二軸
延伸フィルムを安定して製造することが可能となり、産
業上の利用価値は極めて高い。According to the method of the present invention, the occurrence of film cutting and the meandering of the film in the stretching step of the thermoplastic resin film in the case of using the flat simultaneous biaxial stretching method are prevented. It is possible to stably produce a biaxially stretched film of excellent quality, and the industrial utility value is extremely high.
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 4F100 AC10C AK03A AK03C AK03E AK42E AK48A AK48B AK48C AK48D AK48E AL05A AL05B AL05C AL05D AL05E AL06A AL06C AL06E BA01 BA05 BA06 BA10A BA10E BA15 EJ38 JL01 4F210 AA29 AE01 AG03 QA02 QC07 QG01 QG15 QG18 QW12 ──────────────────────────────────────────────────の Continuing on the front page F term (reference) 4F100 AC10C AK03A AK03C AK03E AK42E AK48A AK48B AK48C AK48D AK48E AL05A AL05B AL05C AL05D AL05E AL06A AL06C AL06E BA01 BA05 BA06 BA10A BA10E01G01 Q03 A01G01 QA18Q01
Claims (2)
のリップ間隙よりシート状に溶融押出し、冷却ドラム上
に密着させて急冷して得られた未延伸シートを温水槽中
で調湿処理を行った後、縦および横方向に同時二軸延伸
することにより、二軸延伸熱可塑性樹脂フィルムを製造
する方法において、温水の循環系にフィルタを設置して
温水槽のクリーン度を高めた状態で生産することを特徴
とする二軸延伸フィルムの製造方法。1. An unstretched sheet obtained by melting and extruding a thermoplastic resin into a sheet form from the lip gap of a T-die using an extruder, and closely contacting it on a cooling drum to adjust the humidity in a hot water tank. After performing the treatment, by performing simultaneous biaxial stretching in the vertical and horizontal directions, in a method for producing a biaxially stretched thermoplastic resin film, a filter was installed in a circulation system of warm water to increase the cleanliness of the warm water tank. A method for producing a biaxially stretched film, which is produced in a state.
の最下部に設けることを特徴とする請求項１記載の二軸
延伸フィルムの製造方法。2. The method for producing a biaxially stretched film according to claim 1, wherein an inlet of hot water circulating in the hot water tank is provided at a lowermost portion of the hot water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3853399A JP2000233442A (en) | 1999-02-17 | 1999-02-17 | Production of biaxially stretched film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3853399A JP2000233442A (en) | 1999-02-17 | 1999-02-17 | Production of biaxially stretched film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000233442A true JP2000233442A (en) | 2000-08-29 |
Family
ID=12527928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3853399A Pending JP2000233442A (en) | 1999-02-17 | 1999-02-17 | Production of biaxially stretched film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000233442A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002067142A (en) * | 2000-08-31 | 2002-03-05 | Unitika Ltd | Simultaneously coaxially stretched polyamide film and method for manufacturing the same |
| JP2002127337A (en) * | 2000-10-24 | 2002-05-08 | Unitika Ltd | Multi-layer stretched polyamide film |
| US6649260B2 (en) | 2000-12-08 | 2003-11-18 | Toyo Boseki Kabushiki Kaisha | Optical coating film |
| WO2009128261A1 (en) * | 2008-04-16 | 2009-10-22 | ユニチカ株式会社 | Biaxially stretched polyamide resin film, and process for production thereof |
-
1999
- 1999-02-17 JP JP3853399A patent/JP2000233442A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002067142A (en) * | 2000-08-31 | 2002-03-05 | Unitika Ltd | Simultaneously coaxially stretched polyamide film and method for manufacturing the same |
| JP4535583B2 (en) * | 2000-08-31 | 2010-09-01 | ユニチカ株式会社 | Method for producing simultaneously biaxially stretched polyamide film |
| JP2002127337A (en) * | 2000-10-24 | 2002-05-08 | Unitika Ltd | Multi-layer stretched polyamide film |
| US6649260B2 (en) | 2000-12-08 | 2003-11-18 | Toyo Boseki Kabushiki Kaisha | Optical coating film |
| WO2009128261A1 (en) * | 2008-04-16 | 2009-10-22 | ユニチカ株式会社 | Biaxially stretched polyamide resin film, and process for production thereof |
| US8293160B2 (en) | 2008-04-16 | 2012-10-23 | Unitika Ltd. | Biaxially stretched polyamide resin film, and process for production thereof |
| JP5501223B2 (en) * | 2008-04-16 | 2014-05-21 | ユニチカ株式会社 | Biaxially stretched polyamide resin film and method for producing the same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101553432B1 (en) | Film and method for producing film | |
| EP1920902B1 (en) | Process for production of a biaxially oriented polyester film | |
| EP0073325B1 (en) | Uniaxially oriented nylon film as carrier web for fiber reinforced plastics | |
| JP5546349B2 (en) | Process for producing stretched semi-aromatic polyamide film and stretched semi-aromatic polyamide film produced by the method | |
| JP6032780B2 (en) | Biaxially stretched polybutylene terephthalate film | |
| JP4107446B2 (en) | Method for drying saponified pellets of ethylene-vinyl acetate copolymer | |
| JP2009090587A (en) | Vapor deposition polyamide resin film and film roll using the same | |
| JP5376773B2 (en) | Polyamide resin film | |
| KR900000866B1 (en) | Process for preparation of diaxially drawn | |
| JP2000233442A (en) | Production of biaxially stretched film | |
| JP2000233443A (en) | Production of biaxially stretched film | |
| JP2821243B2 (en) | Manufacturing method of laminated biaxially stretched film | |
| JPH09157410A (en) | Biaxially oriented polyamide film and its production | |
| JPH11216759A (en) | Manufacture of thermoplastic resin film | |
| JP2825904B2 (en) | Manufacturing method of laminated biaxially stretched film | |
| CN113056507A (en) | Film for coating metal plate and resin-coated metal plate | |
| JP2017077623A (en) | Biaxially oriented polyamide film and manufacturing method therefor | |
| JP4726353B2 (en) | Method for producing polyamide-based simultaneous biaxially stretched laminated film | |
| JPH04353429A (en) | Production of uniaxially stretched polyester sheet | |
| JP2012158126A (en) | Twin screw extruder, method for manufacturing thermoplastic resin film using the same | |
| JPH11320673A (en) | Manufacture of simultaneously biaxially oriented film | |
| JP2009012242A (en) | Method of manufacturing biaxially oriented polyester film | |
| JPH0820067A (en) | Production of saturated polyester resin sheet and molded product | |
| JP2001113596A (en) | Method of manufacturing biaxially oriented polyamide film | |
| CN116811184A (en) | Film production process |