JPH06262668A - Production of synthetic resin film - Google Patents
Production of synthetic resin filmInfo
- Publication number
- JPH06262668A JPH06262668A JP5053595A JP5359593A JPH06262668A JP H06262668 A JPH06262668 A JP H06262668A JP 5053595 A JP5053595 A JP 5053595A JP 5359593 A JP5359593 A JP 5359593A JP H06262668 A JPH06262668 A JP H06262668A
- Authority
- JP
- Japan
- Prior art keywords
- film
- air
- mist
- cooling
- synthetic 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 229920003002 synthetic resin Polymers 0.000 title claims abstract description 11
- 239000000057 synthetic resin Substances 0.000 title claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 239000003595 mist Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 230000000694 effects Effects 0.000 abstract description 5
- 238000001704 evaporation Methods 0.000 abstract description 2
- 230000008020 evaporation Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 2
- 238000007142 ring opening reaction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、合成樹脂フイルムの製
造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a synthetic resin film.
【０００２】[0002]
【従来の技術】従来、合成樹脂を押出し機により環状ダ
イスから押出すインフレーションフイルムの製造におい
て、フイルムの冷却速度を上げる方法としては一般的に
風量を増やすことが図られてきたが、風量を増やすとチ
ューブ状フイルムが不安定になり厚み精度が悪くなった
り、製造が困難になるものであった。2. Description of the Related Art Conventionally, in the production of an inflation film in which a synthetic resin is extruded from an annular die by an extruder, it has been generally attempted to increase the air volume as a method of increasing the cooling rate of the film. Therefore, the tube-shaped film becomes unstable and the thickness accuracy deteriorates, and the manufacturing becomes difficult.
【０００３】次に、冷却効果を高めるために環状フイル
ムを冷却するエアーリングに送る前の空気を熱交換器な
どを介して冷却し、フイルムを冷却していた。しかしこ
の空気を冷却する方法はあまり効率が良くないため、装
置が大掛かりになることや費用がかさむなどの問題を有
するものであった。Next, in order to enhance the cooling effect, the air before being sent to the air ring for cooling the annular film is cooled through a heat exchanger or the like to cool the film. However, this method of cooling the air is not very efficient, and thus has problems such as a large scale of the apparatus and cost.
【０００４】また、インフレーションフイルムの冷却装
置として、円形ダイス径の１．１〜２．５倍の径を有す
る上端開口部、下端近傍に吸気孔もしくは吸気スリット
を備えた周璧及びエアーリング開口部径より大きな下端
開口部からなるエアーチャンバーをエアーリング開口部
を囲んで設けるものが知られている（特開昭５６−２５
４１８号公報）。Further, as a cooling device for an inflation film, an upper end opening having a diameter of 1.1 to 2.5 times the diameter of a circular die, a peripheral wall and an air ring opening having an intake hole or an intake slit near the lower end. It is known that an air chamber having a lower end opening larger than the diameter is provided so as to surround the air ring opening (JP-A-56-25).
No. 418).
【０００５】上記従来の装置は、冷却効率を向上させバ
ブルを安定化して高速成形できるインフレーションフイ
ルムの冷却に関するものであるが、押出し量を多くした
り、厚物のフイルムを成形するには十分に対応できない
課題を有するものであった。The above-mentioned conventional apparatus relates to cooling of an inflation film capable of improving the cooling efficiency and stabilizing the bubbles to form the film at a high speed, but it is sufficient for increasing the extrusion amount and forming a thick film. There was a problem that could not be dealt with.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、上記従来技
術の問題点に鑑みなされたものであり、簡単な装置にて
優れた効果を発揮する冷却法を適用して厚いフイルムを
高速で製造できる合成樹脂フイルムの製造方法を提供す
ることを目的とするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art. A thick film is produced at a high speed by applying a cooling method which exhibits excellent effects with a simple device. It is an object of the present invention to provide a method for producing a synthetic resin film that can be produced.
【０００７】[0007]
【課題を解決するための手段】本発明によれば、環状ダ
イスからチューブ状に押出されるフイルムを霧入り空気
で冷却することを特徴とする合成樹脂フイルムの製造方
法が提供され、霧入り空気が噴霧器により発生した微細
な水滴を空気中に均一に浮遊させた空気である前記合成
樹脂フイルムの製造方法が提供される。According to the present invention, there is provided a method for producing a synthetic resin film, characterized in that a film extruded in a tubular shape from an annular die is cooled with atomized air. There is provided a method for producing the synthetic resin film, wherein is water in which fine water droplets generated by a sprayer are uniformly suspended in the air.
【０００８】乾燥空気の比熱は１．００７（ｋｊ／ｋｇ
・℃）であって非常に小さく、熱伝達係数も小さいため
冷却媒体としては効率の良いものではない。The specific heat of dry air is 1.007 (kj / kg)
・ ° C), which is extremely small and has a small heat transfer coefficient, so it is not an efficient cooling medium.
【０００９】本発明は、空気中に含まれる水滴が水蒸気
に相転換する際、２．３×１０3 （ｋｊ／ｋｇ）の蒸発
熱を奪うので乾き空気で冷却するより冷却効果が優れる
ことに鑑み本発明に到達したものである。According to the present invention, when the water droplets contained in the air undergo phase conversion into water vapor, the heat of vaporization of 2.3 × 10 3 (kj / kg) is taken, so that the cooling effect is superior to the case of cooling with dry air. In view of this, the present invention has been reached.
【００１０】以下図面に基づいて詳細に説明する。A detailed description will be given below with reference to the drawings.
【００１１】まず、噴霧器（４）により微細な水滴を発
生させ、空気中に均一に浮遊させた霧入り空気をエアー
リング（３）に導き、該エアーリングの出口から吹き出
して、環状ダイス（１）からチューブ状に押出されるフ
イルム（２）を冷却する。前記霧入り空気はチューブ状
のフイルムに沿って流れ、該フイルムから熱を受けて昇
温し、霧すなわち微細な水滴が水蒸気となって蒸発熱を
奪い冷風となってフイルムを冷却する。First, fine water droplets are generated by the atomizer (4), and the mist-containing air uniformly suspended in the air is guided to the air ring (3) and blown out from the outlet of the air ring to form an annular die (1). ), The film (2) extruded in the form of a tube is cooled. The mist-containing air flows along a tubular film, receives heat from the film and rises in temperature, and mist, that is, minute water droplets, turns into steam to remove evaporation heat and cools the film.
【００１２】本発明で云う霧入り空気とは、噴霧器によ
り発生した微細な水滴を均一に浮遊させた空気かあるい
は空気中に一部の水蒸気が凝縮して浮遊している空気を
意味するものである。The atomized air referred to in the present invention means air in which fine water droplets generated by an atomizer are uniformly suspended or air in which a part of water vapor is condensed and suspended. is there.
【００１３】上記噴霧器としては、加圧された水を小さ
いノズルから噴出させて空気に衝突させ霧状にする加圧
噴霧器、高速の空気流に水を当て霧状にする２流体噴霧
器、超音波で振動する振動子によって水が微細な霧状に
なる超音波噴霧器等がある。水滴が霧状で空気中に浮遊
する量は通常２〜３ｇ／ｍ3 が最大であり、冷却効果を
高めるためにはできるだけ多量の水滴を浮遊させること
が望ましいが、それより更に多量の水滴を浮遊させた場
合は水滴が大粒になってフイルムに付着し、冷却が不均
一になるので好ましくない。水滴の粒径は５０ミクロン
以下が好ましい。As the atomizer, a pressurized atomizer that ejects pressurized water from a small nozzle to collide with air to atomize it, a two-fluid atomizer that atomizes water by applying a high-speed air stream, and ultrasonic waves There is an ultrasonic atomizer that makes water into a fine mist by a vibrator that vibrates at. The maximum amount of water droplets floating in the air in the form of mist is usually 2 to 3 g / m 3 , and it is desirable to float as many water droplets as possible to enhance the cooling effect. If suspended, water droplets become large and adhere to the film, which makes cooling ununiform, which is not preferable. The particle size of the water droplets is preferably 50 microns or less.
【００１４】[0014]
【作用及び効果】以上述べたごとく、本発明の合成樹脂
フイルムの製造方法は霧入り空気を利用してフイルムを
冷却するものであるため、風量を増やさなくとも冷却で
きので、フイルムが安定し、厚肉であっても高速で厚み
精度の良いフイルムが製造できるものである。As described above, since the method for producing the synthetic resin film of the present invention cools the film using the air containing mist, the film can be cooled without increasing the air volume, so that the film is stable. It is possible to manufacture a film having a high thickness and a high accuracy in thickness even if it is thick.
【図１】本発明の合成樹脂フイルムの製造方法を示した
説明図である。FIG. 1 is an explanatory view showing a method for producing a synthetic resin film of the present invention.
１ 環状ダイス ２ フイルム ３ エアーリング ４ 噴霧器 1 Ring die 2 Film 3 Air ring 4 Sprayer
Claims (2)
フイルムを霧入り空気で冷却することを特徴とする合成
樹脂フイルムの製造方法。1. A method for producing a synthetic resin film, which comprises cooling a film extruded in a tubular shape from an annular die with air containing mist.
な水滴を空気中に均一に浮遊させた霧入り空気である請
求項１記載の合成樹脂フルムの製造方法。2. The method for producing a synthetic resin flume according to claim 1, wherein the atomized air is atomized air in which fine water droplets generated by an atomizer are uniformly suspended in the air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5053595A JPH06262668A (en) | 1993-03-15 | 1993-03-15 | Production of synthetic resin film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5053595A JPH06262668A (en) | 1993-03-15 | 1993-03-15 | Production of synthetic resin film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06262668A true JPH06262668A (en) | 1994-09-20 |
Family
ID=12947237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5053595A Pending JPH06262668A (en) | 1993-03-15 | 1993-03-15 | Production of synthetic resin film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06262668A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5280360A (en) * | 1975-12-27 | 1977-07-06 | Mitsui Toatsu Chemicals | Process for manufacturing foam sheet |
| JPS57210823A (en) * | 1981-06-22 | 1982-12-24 | Sumitomo Chem Co Ltd | Cooling method and apparatus for thermoplastic resin film or sheet like object |
| JPS6079927A (en) * | 1983-10-07 | 1985-05-07 | Tokyo Copal Kagaku Kk | Cooler |
-
1993
- 1993-03-15 JP JP5053595A patent/JPH06262668A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5280360A (en) * | 1975-12-27 | 1977-07-06 | Mitsui Toatsu Chemicals | Process for manufacturing foam sheet |
| JPS57210823A (en) * | 1981-06-22 | 1982-12-24 | Sumitomo Chem Co Ltd | Cooling method and apparatus for thermoplastic resin film or sheet like object |
| JPS6079927A (en) * | 1983-10-07 | 1985-05-07 | Tokyo Copal Kagaku Kk | Cooler |
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