JPS6251420A - Manufacture of thermoplastic resin film - Google Patents
Manufacture of thermoplastic resin filmInfo
- Publication number
- JPS6251420A JPS6251420A JP60191258A JP19125885A JPS6251420A JP S6251420 A JPS6251420 A JP S6251420A JP 60191258 A JP60191258 A JP 60191258A JP 19125885 A JP19125885 A JP 19125885A JP S6251420 A JPS6251420 A JP S6251420A
- Authority
- JP
- Japan
- Prior art keywords
- thin film
- thermoplastic resin
- film
- molten
- surging
- 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
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は、熱可塑性樹脂と無機充填剤との組成物から押
出成形によりフィルム、シート等の薄膜を製造するにお
けるサージングの発生を防止し、均一厚みの薄膜を安定
して製造することができることとした熱可塑性樹脂薄膜
の製造方法に関する。Detailed Description of the Invention (a) Industrial Application Field The present invention prevents the occurrence of surging in the production of thin films such as films and sheets by extrusion molding from a composition of a thermoplastic resin and an inorganic filler. The present invention relates to a method for producing a thermoplastic resin thin film, which enables stable production of a thin film having a uniform thickness.
（ロ）従来の技術
従来、この種の薄膜を製造するにおいて、例えば、熱可
塑性樹脂としてのポリオレフィン系樹脂に無機充填剤と
してのカーボンブラックを高濃度に配合した組成物をＴ
ダイから押出して溶融薄膜となし１次いで冷却固化して
引取るにおいて、溶融薄膜が引取り力により引張られて
延伸されるとその厚みが不規則にあるいは規則的に変動
する現象、いわゆるサージングが発生し、極端な場合に
は溶融薄膜が切断してしまうといった問題がある。(b) Conventional technology Conventionally, in manufacturing this type of thin film, for example, a composition containing a polyolefin resin as a thermoplastic resin and carbon black as an inorganic filler at a high concentration was used.
When the molten thin film is extruded from a die to form a molten thin film and then cooled and solidified and then taken off, when the molten thin film is pulled and stretched by the pulling force, a phenomenon in which the thickness changes irregularly or regularly occurs, so-called surging. However, in extreme cases, there is a problem that the molten thin film may be cut.
そして、これらの問題の解決方法として、成形面からは
、押出し温度を下げるとか、押出し速度に対する引取シ
速度の比、即ち延伸速度比を小さくするとか、冷却固化
した薄膜の厚みに対するＴダイ間隙の比、即ち延伸比を
小さくするとかがなされておシ、また、樹脂材料面から
は、ゴム成分を配合するとかがなされている。From the molding perspective, there are ways to solve these problems, such as lowering the extrusion temperature, decreasing the ratio of take-off speed to extrusion speed, that is, the stretching speed ratio, and adjusting the T-die gap to the thickness of the cooled and solidified thin film. Efforts have been made to reduce the ratio, that is, the drawing ratio, and from the viewpoint of resin materials, attempts have been made to mix rubber components.
しかしながら、これらの方法においては、サージングの
発生を充分には防止し得ていないばかシか、得られた薄
膜の機械的強度が低下するとか、生産性が著しく劣ると
いった問題がある。However, these methods have problems such as not being able to sufficiently prevent the occurrence of surging, decreasing the mechanical strength of the obtained thin film, and significantly lowering productivity.
（ハ）発明が解決しようとする問題点
本発明は、前述の現状に鑑みてなされたものであり、熱
可塑性樹脂と無機充填剤との組成物から押出成形により
フィルム、シート等の薄膜を製造するにおいて、サージ
ングの発生を防止し、均一厚みの薄膜を安定して製造す
ることができる熱可塑性樹脂薄膜の製造方法を提供する
ことを目的とする。(c) Problems to be Solved by the Invention The present invention has been made in view of the above-mentioned current situation, and is directed to producing thin films such as films and sheets by extrusion molding from a composition of a thermoplastic resin and an inorganic filler. An object of the present invention is to provide a method for producing a thermoplastic resin thin film that can prevent surging and stably produce a thin film of uniform thickness.
に）問題点を解決する次めの手段
本発明の熱可塑性樹脂薄膜の製造方法は、以下詳述すれ
ば、熱可塑性樹脂と一機充填剤との組成物をＴダイから
押出して溶融薄膜となし、次いで冷却ロールに接触せし
めて冷却固化することにより熱可塑性樹脂薄膜を製造す
るにおいて、前記溶融薄膜に、該溶融薄膜走行方向に対
し≠０〜４５度の角度、１〜１００ｍ／秒の風速で、ス
リット状吹出口からがス状冷却媒体を吹付けることを特
徴とする。B) Next means for solving the problem The method for producing a thermoplastic resin thin film of the present invention will be described in detail below. In producing a thermoplastic resin thin film by cooling and solidifying it by contacting it with a cooling roll, the molten thin film is subjected to an air flow at an angle of ≠0 to 45 degrees with respect to the running direction of the molten thin film and a wind speed of 1 to 100 m/sec. The cooling medium is characterized in that a slit-shaped cooling medium is sprayed from the slit-shaped outlet.
ここで、熱可塑性樹脂とは、低密度ポリエチレン、中密
度ポリエチレン、高密度ポリエチレン、ホリプロピレン
等のα−オレフィン単独重合体、エチレンと、プロピレ
ン、ブテン−１、ヘキセン−１等のα−オレフィン、ア
クリル酸、アクリル酸エステル、酢酸ビニル等トのエチ
レン系共重合体、プロピレンと、エチレン、ブテン−１
、ヘキセン−１等のα−オレフィンとのプロピレン系共
重合体等のポリオレフィン系樹脂、ホリエステル、ポリ
アミド等をいう。中で、本発明は、ポリオレフィン系樹
脂において特に有効である。Here, thermoplastic resins include α-olefin homopolymers such as low-density polyethylene, medium-density polyethylene, high-density polyethylene, and polypropylene, ethylene and α-olefins such as propylene, butene-1, and hexene-1, Ethylene-based copolymers of acrylic acid, acrylic esters, vinyl acetate, etc., propylene, ethylene, butene-1
, polyolefin resins such as propylene copolymers with α-olefins such as hexene-1, polyesters, polyamides, etc. Among these, the present invention is particularly effective for polyolefin resins.
また、無機充填剤とは、アセチレンブラック、ファーネ
スブラック、サーマルブラック、特殊ファーネスブラッ
ク等のカーボンブラック、炭酸カルシウム、酸化カルシ
ウム、タルク、クレー、シリカ、酸化チタン、アルミナ
、硫酸アルミニウム等をいう。中で、本発明は、カーボ
ンブラックにおいて特に有効である。Inorganic fillers include carbon black such as acetylene black, furnace black, thermal black, and special furnace black, calcium carbonate, calcium oxide, talc, clay, silica, titanium oxide, alumina, aluminum sulfate, and the like. Among these, the present invention is particularly effective for carbon black.
本発明において、前記熱可塑性樹脂４０〜９５重量％程
度と前記無機充填剤６０〜５重量係穆度との組成物を、
Ｔダイから１４０〜３００℃で押出して溶融薄膜となし
、次いで冷却ロールに接触せしめて、この際、好ましく
は圧着ロールにて溶融薄膜を冷Ｅロールにて圧着しなが
ら。In the present invention, a composition of about 40 to 95% by weight of the thermoplastic resin and 60 to 5% by weight of the inorganic filler,
It is extruded from a T-die at 140 to 300°C to form a molten thin film, and then brought into contact with a cooling roll, preferably while pressing the molten thin film with a cold E roll using a pressure roll.
冷却固化することにより熱可塑性樹脂薄膜を製造する。A thermoplastic resin thin film is produced by cooling and solidifying.
この際、本発明においては、前記溶融薄膜に、該溶融薄
膜走行方向に対して０〜４５度の角度、１〜１００ ｍ
７秒の風速で、スリット状吹出口からガス状冷却媒体を
吹付けることが必須である。At this time, in the present invention, the molten thin film has an angle of 0 to 45 degrees with respect to the traveling direction of the molten thin film, and a distance of 1 to 100 m.
It is essential to blow the gaseous cooling medium through the slit-shaped outlet at a wind speed of 7 seconds.
ここで、ガス状冷却媒体の吹付は角度が４５度を越える
場合、および、風速が１００ｍ／秒を越える場合には、
溶融薄膜が揺れて不安定となシ、一方、風速が１ ｍ
７秒未満の場合にはサージングの発生防止が不充分とな
る。Here, when the blowing angle of the gaseous cooling medium exceeds 45 degrees and when the wind speed exceeds 100 m/s,
The molten thin film sways and becomes unstable, while the wind speed is 1 m.
If the time is less than 7 seconds, prevention of surging will be insufficient.
なお、ガス状冷却媒体としては、空気が一般的であるが
、これに限定されるものではない。Note that air is generally used as the gaseous cooling medium, but it is not limited to this.
また、本発明において製造される薄膜の厚みは、０．０
１〜１．０．１程度である。Furthermore, the thickness of the thin film produced in the present invention is 0.0
It is about 1 to 1.0.1.
（ホ）作用および効果
本発明の熱可塑性樹脂薄膜の製造方法は、Ｔグイから押
出され冷却ロールに接触せしめられるまでの溶融薄膜に
、特定の角度および風速でスリット状吹出口からがス状
冷却媒体を吹付けてなるので、サージングの発生を確実
に防止し、 。(e) Functions and Effects In the method for producing a thermoplastic resin thin film of the present invention, the molten thin film is extruded from a T-guid and brought into contact with a cooling roll, and is cooled in a slit form from a slit-shaped outlet at a specific angle and wind speed. Since it is sprayed with a medium, it reliably prevents surging from occurring.
均一厚みの薄膜を安定して製造することができるもので
ある。It is possible to stably produce a thin film of uniform thickness.
（へ）実施例
実施例１
高圧法低密度ポリエチレン（三菱油化社製、密度０．９
２０１１／ｃｒｓ”、メルトフローレート１．０１１／
１０分）ＳＯ重量％と、カーボンブラック（電気化学工
業社製、アセチレンブラック）２０重量係との混合物を
バンバリーミキサ−にて２００℃、８０ ｒ、ｐ、ｍ、
で１０分間溶融混練して得た組成物を、Ｌ／Ｄ ２４、
口径６５ｍの押出機に装着した間ｆｌｉ ０．７ ｍの
Ｔダイから、温度２００℃、スクリュー回転数５２ ｒ
、ｐ、ｍで押出して溶融薄膜となし、次いで該溶融薄膜
に、グイ直下３ｃｎ１の位置から溶融薄膜走行方向に対
して約５度の角度で、風速２０ｍ／秒の空気を吹付けた
後、圧着ロールを備え付けた水冷ロールに接触せしめて
冷却固化することにより、厚み５０μのフィルムを製造
した。なお、この時のフィルム引“取り速度は２５ｍ／
分とした。(f) Examples Example 1 High-pressure low-density polyethylene (manufactured by Mitsubishi Yuka Co., Ltd., density 0.9
2011/crs”, melt flow rate 1.011/
10 minutes) A mixture of 20% by weight of SO and 20% by weight of carbon black (manufactured by Denki Kagaku Kogyo Co., Ltd., acetylene black) was heated at 200°C, 80 r, p, m, in a Banbury mixer.
The composition obtained by melt-kneading for 10 minutes at L/D 24,
The extruder was installed in an extruder with a diameter of 65 m and was heated at a temperature of 200°C and a screw rotation speed of 52 r from a 0.7 m T-die.
, p, m to form a molten thin film, and then air was blown onto the molten thin film at a wind speed of 20 m/sec from a position 3cn1 directly below the molten film at an angle of about 5 degrees with respect to the direction of travel of the molten thin film. A film having a thickness of 50 μm was produced by cooling and solidifying the film by contacting it with a water-cooled roll equipped with a pressure roll. The film take-up speed at this time was 25m/
It was a minute.
フィルム創造時におけるサージングは認められず、得ら
れたフィルムは均一厚みを有するものであり九〇
実施例２
エチレン−アクリル酸共重合体（三菱油化社製、アクリ
ル酸含有量８重量％、メルトフローレート７、！１１７
１０分）８５重量％と、カーボンブラック（日本イージ
ー社製、「ケッチェンブラック」）１５重量％との組成
物を用い、押出し温度を２１０℃、スクリュー回転数を
３１ｒ、ｐ、ｍ、引取り速度を３．５ ｍ ７分、フィ
ルム厚みを１００μとした外は、実施例１と同様にして
フィルムを製造した。No surging was observed during film creation, and the obtained film had a uniform thickness. Flow rate 7,!117
Using a composition of 85% by weight (10 minutes) and 15% by weight of carbon black (Ketjen Black, manufactured by Japan Easy Co., Ltd.), the extrusion temperature was 210°C, the screw rotation speed was 31r, p, m, and take-up. A film was produced in the same manner as in Example 1, except that the speed was 3.5 m for 7 minutes and the film thickness was 100 μm.
フィルム製造時におけるサージングは認められず、得ら
れたフィルムは均一厚みを有するものであった。No surging was observed during film production, and the obtained film had a uniform thickness.
実施例３
高密度ポリエチレン（三菱油化社製、密度０．９５０１
／ ７ｃｍ３、メルトフローレート０．８＃／１０分）
８５５重量と、カーがンブラック（日本イージー社製、
「ケッチェンブラック」）１５重量係との組成物を用い
、押出し温度を２１０℃、スクリュー回転数を２５ ｒ
、ｐ、ｍ、、引取り速度を３、５ ｍ ７分、シート厚
みを０，２４簡とした外は、実施例１と同様にしてシー
トを製造した。Example 3 High-density polyethylene (manufactured by Mitsubishi Yuka Co., Ltd., density 0.9501
/ 7cm3, melt flow rate 0.8#/10 minutes)
855 weight and car gun black (manufactured by Japan Easy Co., Ltd.)
"Ketjenblack") using a composition with a weight factor of 15, the extrusion temperature was 210 ° C., and the screw rotation speed was 25 r.
, p, m, A sheet was produced in the same manner as in Example 1, except that the take-up speed was 3.5 m 7 minutes and the sheet thickness was 0.24 mm.
シート製造時におけるサージングは認められず、得られ
たフィルムは均一厚みを有するものであった。No surging was observed during sheet production, and the resulting film had a uniform thickness.
実施例４
ｆａピレン−エチレン共重合体（三菱油化社製、エチレ
ン含有量４重量係、密度０．８９０１／ｃｍ３、メルト
フローレート４．０．９７１０分）ｓｏ重量％と、カー
ボンブラック（電気化学工業社製、アセチレンブラック
）２００重量との組成物を用い、Ｔダイ間隙を０．５１
、押出し温度を２１０℃、スクリュー回転数を２６ ｒ
、ｐ、ｍ、引取シ速度を２６ｍ／分、フィルム厚みを２
０μとし、かつ、吹付は空気の風速を１０ｍ／秒とした
外は、実施例１と同様にしてフィルムを製造した。Example 4 fa pyrene-ethylene copolymer (manufactured by Mitsubishi Yuka Co., Ltd., ethylene content 4% by weight, density 0.8901/cm3, melt flow rate 4.0.9710 min) sow% and carbon black (electrical Acetylene black (manufactured by Kagaku Kogyo Co., Ltd.) 200 weight was used, and the T-die gap was set to 0.51.
, the extrusion temperature was 210°C, and the screw rotation speed was 26 r.
, p, m, take-up speed 26 m/min, film thickness 2
A film was produced in the same manner as in Example 1, except that the film was 0 μ and the air velocity was 10 m/sec.
フィルム製造時におけるサージングは認められず、得ら
れたフィルムは均一厚みを有するものであった。No surging was observed during film production, and the obtained film had a uniform thickness.
比較例１〜４
実施例１〜４の各々において、溶融薄膜に対する空気の
吹付けを止めた場合、直ちに明らかなサージングが発生
した。Comparative Examples 1-4 In each of Examples 1-4, obvious surging occurred immediately when the blowing of air to the molten thin film was stopped.
Claims (1)
して溶融薄膜となし、次いで冷却ロールに接触せしめて
冷却固化することにより熱可塑性樹脂薄膜を製造するに
おいて、前記溶融薄膜に、該溶融薄膜走行方向に対して
０〜４５度の角度、１〜１００ｍ／秒の風速で、スリッ
ト状吹出口からガス状冷却媒体を吹付けることを特徴と
する熱可塑性樹脂薄膜の製造方法。In producing a thermoplastic resin thin film by extruding a composition of a thermoplastic resin and an inorganic filler through a T-die to form a molten thin film, and then bringing it into contact with a cooling roll to cool and solidify, the molten thin film is A method for producing a thermoplastic resin thin film, which comprises blowing a gaseous cooling medium from a slit-shaped outlet at an angle of 0 to 45 degrees with respect to the film running direction and at a wind speed of 1 to 100 m/sec.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60191258A JPS6251420A (en) | 1985-08-30 | 1985-08-30 | Manufacture of thermoplastic resin film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60191258A JPS6251420A (en) | 1985-08-30 | 1985-08-30 | Manufacture of thermoplastic resin film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6251420A true JPS6251420A (en) | 1987-03-06 |
Family
ID=16271542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60191258A Pending JPS6251420A (en) | 1985-08-30 | 1985-08-30 | Manufacture of thermoplastic resin film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6251420A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0250815A (en) * | 1988-08-12 | 1990-02-20 | Teijin Ltd | Melt filming method for polyester containing carbon black |
| KR100301317B1 (en) * | 1998-03-03 | 2001-11-22 | 이종상 | Manufacturing method of inexpensive synthetic paper |
-
1985
- 1985-08-30 JP JP60191258A patent/JPS6251420A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0250815A (en) * | 1988-08-12 | 1990-02-20 | Teijin Ltd | Melt filming method for polyester containing carbon black |
| KR100301317B1 (en) * | 1998-03-03 | 2001-11-22 | 이종상 | Manufacturing method of inexpensive synthetic paper |
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