JPH05338024A - Method and apparatus for producing heat-resistant tubular film - Google Patents
Method and apparatus for producing heat-resistant tubular filmInfo
- Publication number
- JPH05338024A JPH05338024A JP15379992A JP15379992A JPH05338024A JP H05338024 A JPH05338024 A JP H05338024A JP 15379992 A JP15379992 A JP 15379992A JP 15379992 A JP15379992 A JP 15379992A JP H05338024 A JPH05338024 A JP H05338024A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- outer diameter
- film
- diameter regulating
- tubular
- 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
- 238000000034 method Methods 0.000 title abstract description 13
- 230000001105 regulatory effect Effects 0.000 claims abstract description 68
- 238000010438 heat treatment Methods 0.000 claims abstract description 62
- 238000004519 manufacturing process Methods 0.000 claims abstract description 31
- 229920005992 thermoplastic resin Polymers 0.000 claims description 4
- 238000000137 annealing Methods 0.000 abstract description 30
- 238000007664 blowing Methods 0.000 abstract description 7
- 230000000704 physical effect Effects 0.000 abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052782 aluminium Inorganic materials 0.000 abstract description 5
- 229910001369 Brass Inorganic materials 0.000 abstract description 3
- 239000004695 Polyether sulfone Substances 0.000 abstract description 3
- 239000010951 brass Substances 0.000 abstract description 3
- 229920006393 polyether sulfone Polymers 0.000 abstract description 3
- 239000004697 Polyetherimide Substances 0.000 abstract description 2
- 229920001601 polyetherimide Polymers 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract 1
- 229920006259 thermoplastic polyimide Polymers 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229920006015 heat resistant resin Polymers 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920001643 poly(ether ketone) Polymers 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- 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、電子機器の定着ローラ
等に用いられる耐熱性チューブフィルムの製造方法及び
その製造方法を実施する製造装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a heat-resistant tube film used for a fixing roller of electronic equipment and a manufacturing apparatus for carrying out the method.
【０００２】[0002]
【従来の技術】複写機等の定着ローラ等に装着されてい
る耐熱性チューブフィルムは、一般に次のようにして製
造される。耐熱性に優れた熱可塑性樹脂をチューブ状に
押し出して得られるチューブ状未延伸フィルムを、該チ
ューブ状未延伸フィルムの径が所定径となるまで加熱延
伸した後、機械的物性の向上を図るためにアニーリング
（熱処理）を施す。加熱延伸の方法としては、ニップロ
ール間に湯や温風等の加圧媒体をブローするインフレー
ション方式が用いられる。アニーリングは、所定径に延
伸されたチューブ状未延伸フィルム内にアルミ管等を挿
入した状態でオーブン等に入れて加熱することにより行
われる。2. Description of the Related Art A heat-resistant tube film mounted on a fixing roller of a copying machine or the like is generally manufactured as follows. In order to improve mechanical properties, a tubular unstretched film obtained by extruding a thermoplastic resin having excellent heat resistance into a tubular shape is heated and stretched until the diameter of the tubular unstretched film reaches a predetermined diameter. Annealing (heat treatment) is performed. As the heating and stretching method, an inflation method is used in which a pressurized medium such as hot water or warm air is blown between nip rolls. Annealing is performed by placing an aluminum tube or the like in a tubular unstretched film stretched to a predetermined diameter and placing it in an oven or the like for heating.
【０００３】[0003]
【発明が解決しようとする課題】しかし、湯や温風等の
加圧媒体を用いるインフレーション方式では、折り目が
発生したり、チューブ状未延伸フィルムの径が安定しな
いなどという問題がある他、ガラス転移点が１００℃を
超えるような耐熱性の熱可塑性樹脂からなるチューブ状
未延伸フィルムを均一に延伸することが困難であるとい
う問題がある。However, in the inflation system using a pressurized medium such as hot water or warm air, there are problems that folds occur and the diameter of the tubular unstretched film is not stable. There is a problem that it is difficult to uniformly stretch a tubular unstretched film made of a heat-resistant thermoplastic resin having a transition point of more than 100 ° C.
【０００４】また、アニーリングの温度がフィルムの物
性に大きく影響を与えることから、アニーリング工程時
の温度調節が重要であるにも拘らず、オーブンの開閉に
伴う温度変化（例えば、オーブンの開閉により一旦下が
ったオーブン内の温度が再び所定温度に戻るためには数
分間必要である）などの理由から、精密な温度調節が行
えず、充分な物性向上が図れない。またオーブン温度が
アニーリングのロッド毎で多少変化するため、得られた
チューブフィルムの物性もロッド間でばらつく。Further, since the annealing temperature has a great influence on the physical properties of the film, it is important to control the temperature during the annealing step, but the temperature change accompanying the opening and closing of the oven (for example, once the opening and closing of the oven causes the temperature to change). It takes several minutes for the temperature in the lowered oven to return to the predetermined temperature again). Therefore, precise temperature control cannot be performed, and sufficient physical properties cannot be improved. Further, since the oven temperature changes a little for each annealing rod, the physical properties of the obtained tube film also vary among the rods.
【０００５】さらに、アニーリングによりチューブフィ
ルムの結晶化が進むと、チューブフィルムが収縮してア
ルミ管等に融着してしまい、チューブフィルムの取り外
しが困難であった。治具等を用いてチューブフィルムを
取り外すことは、チューブを傷つけるおそれがあるため
好ましくない。さらにまた、従来の製造方法は、延伸工
程とアニーリング工程との２工程からなるため、面倒で
あるという問題もあった。Further, when the tube film is crystallized by annealing, the tube film shrinks and is fused to an aluminum tube or the like, which makes it difficult to remove the tube film. Removing the tube film with a jig or the like is not preferable because it may damage the tube. Furthermore, since the conventional manufacturing method includes two steps including a stretching step and an annealing step, there is a problem that it is troublesome.
【０００６】本発明は、このような事情に鑑みてなされ
たものであり、その目的とするところは、チューブの延
伸工程とアニーリング工程とを別々の２工程で行わず、
且つ両工程を一定温度に調節した条件下で行う耐熱性チ
ューブフィルムの製造方法及びその方法を実施する装置
を提供することにある。The present invention has been made in view of such circumstances, and an object thereof is not to perform the tube stretching step and the annealing step in two separate steps,
Another object of the present invention is to provide a method for producing a heat-resistant tube film and a device for carrying out the method, in which both steps are performed under the condition that the temperature is adjusted to a constant temperature.
【０００７】[0007]
【課題を解決するための手段】本発明の耐熱性チューブ
フィルムの製造方法は、一端が閉塞された熱可塑性樹脂
からなるチューブ状未延伸フィルムを、所定の内径を有
するチューブ外径規制用管に挿入し、予め所定温度に設
定したチューブ加熱手段に、前記チューブ外径規制用管
を挿入し、次いで、前記チューブ状未延伸フィルムの他
端の開口部から加圧媒体を供給して、前記チューブ状未
延伸フィルムを前記チューブ外径規制用管で規制される
まで周方向に延伸することを特徴とする。A method for producing a heat-resistant tube film according to the present invention comprises a tube-shaped unstretched film made of a thermoplastic resin whose one end is closed to a tube outer diameter regulating tube having a predetermined inner diameter. The tube outer diameter regulating tube is inserted into the tube heating means set to a predetermined temperature in advance, and then a pressurizing medium is supplied from the opening portion at the other end of the tubular unstretched film to the tube. The unstretched film is stretched in the circumferential direction until it is regulated by the tube outer diameter regulating tube.
【０００８】本発明の製造装置は、周方向の延伸による
チューブ状未延伸フィルムの拡径を規制するチューブ外
径規制用管と、該チューブ外径規制用管が挿脱可能で、
且つ前記チューブ外径規制用管を等方向に加熱するチュ
ーブ加熱手段とを備える。In the manufacturing apparatus of the present invention, the tube outer diameter regulating tube for regulating the diameter expansion of the tubular unstretched film by stretching in the circumferential direction and the tube outer diameter regulating tube can be inserted and removed.
And a tube heating means for heating the tube outer diameter regulating tube in the same direction.
【０００９】[0009]
【作用】加熱延伸工程における加熱は、チューブ外径規
制用管を介してチューブ加熱手段により行うので、湯や
温風等の加熱媒体を用いる場合よりも高温加熱が可能と
なる。また、加熱手段を延伸工程全体に至って一定温度
に設定しているので、何度で何分というようなアニーリ
ングを正確に行うことができる。Since the heating in the heating and drawing step is performed by the tube heating means through the tube outer diameter regulating tube, the heating can be performed at a higher temperature than in the case of using a heating medium such as hot water or warm air. Further, since the heating means is set to a constant temperature throughout the stretching process, it is possible to accurately perform annealing such as how many times and how many minutes.
【００１０】一方、延伸はチューブ外径規制用管を介し
てチューブ状未延伸フィルムが加熱された状態で、該チ
ューブ状未延伸フィルム内へ加圧媒体を供給することに
より行われる。チューブ状未延伸フィルムの外径がチュ
ーブ外径規制用管で規制されるまで加圧媒体を供給すれ
ばよいので、延伸時の制御が容易な上に、チューブ外径
規制用管で設定される寸法のチューブフィルムが得られ
る。また、アニーリング工程も、加圧媒体を供給しつつ
行われるので、アニーリングによる収縮等がなく、寸法
精度の高いチューブフィルムを製造できる。On the other hand, the stretching is carried out by supplying a pressurizing medium into the tubular unstretched film while the tubular unstretched film is heated through the tube outer diameter regulating tube. Since it is sufficient to supply the pressurized medium until the outer diameter of the tubular unstretched film is regulated by the tube outer diameter regulating tube, it is easy to control at the time of stretching and set by the tube outer diameter regulating tube. A tube film of dimensions is obtained. Further, since the annealing step is also performed while supplying the pressurized medium, it is possible to manufacture a tube film having high dimensional accuracy without shrinkage or the like due to annealing.
【００１１】[0011]
【実施例】本発明の製造方法を実施する製造装置を図１
に示す。図１（ａ）に示す１は、チューブ外径規制用管
である。チューブ外径規制用管１に、一般に熱伝導性が
良好な真鍮、ステンレス、アルミニウム製のものが用い
られる。チューブ外径規制用管１の内径は、製造しよう
とするチューブフィルムの外径に相当する。チューブ外
径規制用管１の厚みは、厚すぎるとチューブ外径規制用
管１自体の加熱冷却に時間がかかり、薄すぎると加熱に
より変形するおそれがあるため、１〜２ｍｍが好まし
い。また、チューブ外径規制用管１の内壁面は、チュー
ブフィルムを傷つけないように鏡面仕上げにしておくこ
とが好ましい。さらに、作成されたチューブフィルムを
容易にチューブ外径規制用管１から取り出せるように、
チューブ外径規制用管１の内壁面に離型材を塗布、又は
クロムメッキ後、離型材を塗布しておくことが好まし
い。FIG. 1 shows a manufacturing apparatus for carrying out the manufacturing method of the present invention.
Shown in. Reference numeral 1 shown in FIG. 1A is a tube outer diameter regulating tube. The tube 1 for controlling the tube outer diameter is generally made of brass, stainless steel, or aluminum having good thermal conductivity. The inner diameter of the tube outer diameter regulating tube 1 corresponds to the outer diameter of the tube film to be manufactured. If the thickness of the tube outer diameter regulating tube 1 is too thick, it takes time to heat and cool the tube outer diameter regulating tube 1 itself, and if it is too thin, it may be deformed by heating. The inner wall surface of the tube outer diameter regulating tube 1 is preferably mirror-finished so as not to damage the tube film. Furthermore, so that the produced tube film can be easily taken out from the tube outer diameter regulating tube 1,
It is preferable that the inner wall surface of the tube outer diameter regulating tube 1 is coated with a mold release material or is plated with chrome and then coated with the mold release material.
【００１２】チューブ加熱手段は図１（ｂ）に示されて
いる。このチューブ加熱手段は、バンドヒータ２と加熱
用管３との組合せからなり、バンドヒータ２は加熱用管
３の外周に装着されている。図中、４は熱電対である。
加熱用管３の内径は、加熱温度、チューブ外径規制用管
１の材質等により適宜選択されるが、一般には加熱用管
３内をチューブ外径規制用管１が自在に挿脱できるよう
に、チューブ外径規制用管１の外径よりも約２〜５％程
度大きい。加熱用管３の厚みは、加熱方式の種類にもよ
るが、通常１０〜２０ｍｍ程度である。加熱用管３の長
さは、作成しようとするチューブフィルムの長さ及び加
熱方式にもよるが、長いチューブフィルムを作成しよう
とする場合、一般にチューブ外径規制用管１よりも短い
ものを用いる。The tube heating means is shown in FIG. 1 (b). This tube heating means is composed of a combination of a band heater 2 and a heating tube 3, and the band heater 2 is attached to the outer circumference of the heating tube 3. In the figure, 4 is a thermocouple.
The inner diameter of the heating tube 3 is appropriately selected depending on the heating temperature, the material of the tube outer diameter regulating tube 1, and the like. Generally, the tube outer diameter regulating tube 1 can be freely inserted into and removed from the heating tube 3. Moreover, it is about 2 to 5% larger than the outer diameter of the tube outer diameter regulating tube 1. The thickness of the heating tube 3 is usually about 10 to 20 mm, though it depends on the type of heating method. The length of the heating tube 3 depends on the length of the tube film to be produced and the heating method, but when producing a long tube film, generally, a tube shorter than the tube outer diameter regulating tube 1 is used. ..
【００１３】なお、本発明のチューブ加熱手段は、チュ
ーブ外径規制用管１を等方向に加熱できるものであれば
よく、バンドヒータ２と加熱用管３との組合せには限ら
ない。また、加熱方式は、加熱手段に応じて電気加熱方
式、誘導加熱方式、上記加熱方式などが用いられる。次
に、図１の製造装置を用いて、耐熱性チューブフィルム
を製造する本発明の製造方法について説明する。The tube heating means of the present invention is not limited to the combination of the band heater 2 and the heating tube 3 as long as it can heat the tube outer diameter regulating tube 1 in the same direction. As the heating method, an electric heating method, an induction heating method, the above heating method, or the like is used depending on the heating means. Next, the manufacturing method of the present invention for manufacturing a heat resistant tube film using the manufacturing apparatus of FIG. 1 will be described.
【００１４】まず、チューブ外径規制用管１にチューブ
状未延伸フィルム５を挿入する。本発明に用いられるチ
ューブ状未延伸フィルム５は、ポリエーテルサルホン、
ポリエーテルイミド、ポリエーテルエーテルケトン、熱
可塑性ポリイミド等の耐熱性樹脂を押し出し成形等によ
りチューブ状にしたものである。チューブ状未延伸フィ
ルム５の直径、厚み等は、樹脂の種類、延伸倍率等によ
り適宜選択されるが、一般には直径２０〜１００ｍｍ、
厚み３０〜１００μｍ程度である。このチューブ状未延
伸フィルム５の一端６はヒートシール、栓体等により閉
塞され、他端７には、チューブ状未延伸フィルム５の内
部に空気を吹き込むためのチャック８が取り付けられて
いる。９はチャック８の吹込口である。First, the tubular unstretched film 5 is inserted into the tube outer diameter regulating tube 1. The tubular unstretched film 5 used in the present invention is a polyether sulfone,
It is made into a tube shape by extrusion molding a heat-resistant resin such as polyetherimide, polyetheretherketone, or thermoplastic polyimide. The diameter, thickness, etc. of the tubular unstretched film 5 are appropriately selected depending on the type of resin, the stretch ratio, etc., but generally the diameter is 20-100 mm,
The thickness is about 30 to 100 μm. One end 6 of the tubular unstretched film 5 is closed by a heat seal, a plug or the like, and a chuck 8 for blowing air into the tubular unstretched film 5 is attached to the other end 7. Reference numeral 9 is a blowing port of the chuck 8.
【００１５】チューブ状未延伸フィルム５を挿入したチ
ューブ外径規制用管１を、バンドヒータ２で所定温度に
加熱した加熱用管３に、加熱用管３における熱電対４が
設けられている側の端とチューブ外径規制用管１の閉塞
端とが一致するように挿入する。ここで、所定温度と
は、チューブ状未延伸フィルム５のアニーリング温度で
ある。The tube outer diameter regulating tube 1 in which the tubular unstretched film 5 is inserted is heated by the band heater 2 to a predetermined temperature, and the heating tube 3 is provided with the thermocouple 4 in the heating tube 3. Is inserted so that the end of the tube and the closed end of the tube outer diameter regulating tube 1 are aligned with each other. Here, the predetermined temperature is an annealing temperature of the tubular unstretched film 5.
【００１６】かかる状態で、吹込口５からチューブ状未
延伸フィルム１内に、加圧媒体たる空気を吹き込む（図
２参照）。空気の吹込み圧力は、チューブ状未延伸フィ
ルムの延伸倍率にもよるが、一般に０．１〜５ｋｇ／ｃ
ｍ2 、好ましくは１〜３ｋｇ／ｃｍ2 である。なお、加
圧媒体は常温の空気に限らず、加熱空気、窒素ガス等で
あってもよい。In this state, air as a pressurizing medium is blown into the tubular unstretched film 1 through the blowing port 5 (see FIG. 2). The air blowing pressure is generally 0.1 to 5 kg / c, though it depends on the draw ratio of the tubular unstretched film.
m 2 , preferably 1 to 3 kg / cm 2 . The pressurizing medium is not limited to room temperature air, but may be heated air, nitrogen gas, or the like.
【００１７】チューブ状未延伸フィルム５は所定温度に
保持された加熱用管３及びチューブ外径規制用管１を介
して加熱されて軟化し、かかる状態で空気が吹き込まれ
ることにより、周方向に延伸される。このとき、チュー
ブ状未延伸フィルム５の拡径は、チューブ外径規制用管
１で規制される。一方、チューブ外径規制用管１はアニ
ーリング温度に保持されていることから、チューブ状未
延伸フィルム５の延伸と共に又は延伸後に、アニーリン
グが行われる。すなわち、延伸後のチューブ状未延伸フ
ィルムであるチューブフィルムの結晶化が促進される。The tubular unstretched film 5 is softened by being heated through the heating tube 3 and the tube outer diameter regulating tube 1 which are held at a predetermined temperature, and air is blown in such a state so that it is circumferentially moved. It is stretched. At this time, the diameter expansion of the tubular unstretched film 5 is regulated by the tube outer diameter regulating tube 1. On the other hand, since the tube outer diameter regulating tube 1 is maintained at the annealing temperature, annealing is performed together with or after the stretching of the tubular unstretched film 5. That is, crystallization of the tube film, which is the unstretched tubular film after stretching, is promoted.
【００１８】このような操作を、バンドヒータ２を装着
した加熱用管３を順次吹込口９側に移動させて、チュー
ブ状未延伸フィルム５の他端７まで同様に行うことによ
り、チューブ状未延伸フィルム５全体を延伸する（図３
参照）。加熱用管３が移動して、加熱用管３から出てき
たチューブ外径規制用管１の部分、すなわち延伸及びア
ニーリングが終了したチューブ状未延伸フィルム５の閉
塞端６側は、空気冷却又は必要に応じて冷媒により冷却
される。This operation is performed by moving the heating tube 3 equipped with the band heater 2 toward the blowing port 9 side in the same manner as above until the other end 7 of the tubular unstretched film 5 is obtained. The entire stretched film 5 is stretched (Fig. 3
reference). The portion of the tube outer diameter regulating tube 1 that comes out of the heating tube 3 when the heating tube 3 moves, that is, the closed end 6 side of the tubular unstretched film 5 that has been stretched and annealed is air-cooled or It is cooled by a refrigerant as needed.
【００１９】なお、加熱用管３を移動させる場合だけで
なく、チューブ外径規制用管１又は加熱用管３とチュー
ブ外径規制用管１との双方を移動させてもよい。このと
き、チューブ外径規制用管１と加熱用管３との相対的移
動速度は、チューブ状未延伸フィルム５のアニーリング
条件を満足できるように選択する。例えば、熱可塑性ポ
リイミドであれば３００℃で５分、ポリエーテルケトン
であれば２５０℃で３分、ポリエーテルサルホンであれ
ば２３０℃で５分というような条件を満足するように、
相対的移動速度を設定する。Not only when the heating pipe 3 is moved, the tube outer diameter regulating pipe 1 or both the heating pipe 3 and the tube outer diameter regulating pipe 1 may be moved. At this time, the relative moving speeds of the tube outer diameter regulating tube 1 and the heating tube 3 are selected so as to satisfy the annealing conditions of the tubular unstretched film 5. For example, in order to satisfy the conditions that thermoplastic polyimide is 300 ° C. for 5 minutes, polyether ketone is 250 ° C. for 3 minutes, and polyether sulfone is 230 ° C. for 5 minutes.
Set the relative movement speed.
【００２０】チューブ状未延伸フィルム５全体の延伸及
びアニーリングが終了したら、加熱用管３からチューブ
外径規制用管１をすばやく抜き取り、さらにチューブ外
径規制用管１から製造されたチューブフィルム５’を抜
き取る（図４参照）。以上のような製造方法によれば、
延伸工程とアニーリング工程とを別々の２工程で行わず
に済む。従って、従来のようにアニーリング処理による
フィルムの収縮を考える必要がなく、しかも延伸時にお
けるチューブフィルムの外径はチューブ外径規制用管１
により規制されているので、寸法精度の高いチューブフ
ィルムが得られる。そして、チューブ状未延伸フィルム
５全体にわたって行われる延伸及びアニーリング工程に
おいて、温度を一定に保持できるので、適切なアニーリ
ング処理を行って、チューブフィルムの充分な物性向上
を図ることができる。また、作成されるチューブフィル
ム間のばらつきも小さくなる。When the stretching and annealing of the entire tubular unstretched film 5 are completed, the tube outer diameter regulating tube 1 is quickly removed from the heating tube 3, and the tube film 5'made from the tube outer diameter regulating tube 1 is further drawn. (See Fig. 4). According to the manufacturing method as described above,
It is not necessary to perform the stretching step and the annealing step in two separate steps. Therefore, it is not necessary to consider shrinkage of the film due to the annealing treatment as in the conventional case, and the outer diameter of the tube film at the time of stretching is the tube outer diameter regulating tube 1.
As a result, the tube film with high dimensional accuracy can be obtained. Since the temperature can be kept constant in the stretching and annealing steps performed over the entire tubular unstretched film 5, an appropriate annealing treatment can be performed to sufficiently improve the physical properties of the tube film. In addition, variations among the produced tube films are reduced.
【００２１】また、本発明の製造装置において、チュー
ブフィルムの長さに応じた加熱媒体手段を個々に用意し
なくてもよい。本発明の製造方法において、チューブ外
径規制用管と加熱媒体手段との相対的移動速度を調節す
ることにより、チューブ状未延伸フィルムに応じたアニ
ーリングを達成できる。チューブ外径規制用管よりも短
い加熱媒体手段を用いた場合において、加熱媒体手段を
チューブ状未延伸フィルムの閉塞端側から順次加圧媒体
の吹込口に移動させることにより、チューブ外径規制用
管とチューブ状未延伸フィルムとの間に存在した空気を
吹込口側に押し出すことができる。よって、長いチュー
ブフィルムを作成する場合にも延伸及びアニーリング工
程中に空気をかみこんだりせず、空気のかみこみによる
周面がへこんだようなチューブフィルム等が作成される
ことを防止できる。Further, in the manufacturing apparatus of the present invention, it is not necessary to individually prepare heating medium means according to the length of the tube film. In the production method of the present invention, by adjusting the relative moving speed of the tube outer diameter regulating tube and the heating medium means, annealing according to the tubular unstretched film can be achieved. When a heating medium means shorter than the tube outer diameter regulating tube is used, the heating medium means is sequentially moved from the closed end side of the tubular unstretched film to the blow-in port of the pressurized medium to regulate the tube outer diameter. Air existing between the tube and the tubular unstretched film can be pushed out toward the blow-in port. Therefore, even when producing a long tube film, it is possible to prevent the production of a tube film or the like in which the peripheral surface is dented due to the entrapment of air without entrapping air during the stretching and annealing steps.
【００２２】次に、本発明の製造方法により耐熱性チュ
ーブフィルムを作成する場合において、移動速度が及ぼ
すチューブフィルムの機械的物性への影響について、熱
可塑性ポリイミドのチューブ状未延伸フィルム（三井東
圧社製のＮＥＷ−ＴＰＩ）（直径２３ｍｍ、厚み５０μ
ｍ、長さ８００ｍｍ）を例に説明する。図１に示す製造
装置において、チューブ外径規制用管として内径２５ｍ
ｍ、外径２７ｍｍ長さ７００ｍｍの真鍮製の管を用い、
加熱用管として内径２８ｍｍ、外径３６ｍｍ長さ２５０
ｍｍのアルミニウム製の管を用いた。加熱用管の外周に
は、幅２５０ｍｍ、内径３６ｍｍのバンドヒータが装着
されている。Next, in the case of producing a heat resistant tube film by the production method of the present invention, regarding the influence of the moving speed on the mechanical properties of the tube film, a tubular unstretched film of thermoplastic polyimide (Mitsui Toatsu NEW-TPI) (23 mm in diameter, 50 μ in thickness)
m, length 800 mm) will be described as an example. In the manufacturing apparatus shown in FIG. 1, the inner diameter is 25 m as a tube for regulating the outer diameter of the tube.
m, outer diameter 27 mm, length 700 mm using a brass tube,
Inner diameter 28 mm, outer diameter 36 mm, length 250 as heating tube
A mm aluminum tube was used. A band heater having a width of 250 mm and an inner diameter of 36 mm is attached to the outer circumference of the heating tube.
【００２３】前記チューブ状未延伸フィルムをチューブ
外径規制用管に挿入し、これを３００℃に設定された加
熱用管に挿入した。一方、チューブ状未延伸フィルムの
開口部から、１ｋｇ／ｃｍ2 の空気圧で空気を吹込み、
チューブ状未延伸フィルムをチューブ外径規制用管で規
制されるまで周方向に延伸膨張させると共に、加熱用管
を毎分２５０ｍｍの速度で順次移動させた。延伸及びア
ニーリングが終了した閉塞端側のチューブフィルムが挿
入されているチューブ外径規制用管は空気冷却した。チ
ューブ状未延伸フィルム全体の延伸及びアニーリングが
終了した後、加熱用管からチューブ外径規制用管をすば
やく取り出し、さらにチューブ外径規制用管からチュー
ブフィルムを取り出した。The tubular unstretched film was inserted into a tube outer diameter regulating tube, which was then inserted into a heating tube set at 300 ° C. On the other hand, air was blown in from the opening of the tubular unstretched film at an air pressure of 1 kg / cm 2 ,
The tubular unstretched film was stretched and expanded in the circumferential direction until it was regulated by the tube outer diameter regulating tube, and the heating tube was sequentially moved at a speed of 250 mm / min. The tube outer diameter regulating tube in which the tube film on the closed end side after the stretching and annealing was inserted was air-cooled. After the stretching and annealing of the entire tubular unstretched film were completed, the tube outer diameter regulating tube was quickly taken out from the heating tube, and further the tube film was taken out from the tube outer diameter regulating tube.
【００２４】加熱用管の移動速度が毎分１５０ｍｍ及び
５０ｍｍの場合についても、同様にしてチューブフィル
ムを作成した。なお、加熱用管の移動速度が５０ｍｍの
場合に用いたチューブ状未延伸フィルムの長さは２１０
０ｍｍ、チューブ外径規制用管の長さは２０００ｍｍで
ある。得られたチューブフィルムについて測定したヤン
グ率、引っ張り強度、伸度、及び結晶化度の結果を表１
に示す。A tube film was prepared in the same manner when the moving speed of the heating tube was 150 mm and 50 mm per minute. The length of the tubular unstretched film used when the moving speed of the heating tube was 50 mm was 210.
The length of the tube for tube outer diameter regulation is 2000 mm. The results of Young's modulus, tensile strength, elongation, and crystallinity measured on the obtained tube film are shown in Table 1.
Shown in.
【００２５】[0025]
【表１】 [Table 1]
【００２６】表１から、チューブフィルムの機械的物性
は加熱用管の移動速度に依存することがわかる。熱可塑
性ポリイミドに最適なアニーリング条件（３００℃で５
分）を満足するように移動速度（毎分５０ｍｍ）を設定
すれば、機械的物性が充分向上したチューブフィルム
（結晶化度２６〜３０％）が得られる。From Table 1, it can be seen that the mechanical properties of the tube film depend on the moving speed of the heating tube. Optimum annealing conditions for thermoplastic polyimide (5 at 300 ° C
If the moving speed (50 mm / min) is set so as to satisfy (min), a tube film (crystallinity of 26 to 30%) having sufficiently improved mechanical properties can be obtained.
【００２７】[0027]
【発明の効果】本発明の製造方法によれば、延伸工程と
アニーリング工程とを２工程に分けて行わないので、製
造の容易化が図れるだけでなく、従来のようにアニーリ
ングによるフィルムの収縮を考えなくてもよい。そし
て、チューブ外径規制用管により規制した状態で延伸す
るので、チューブフィルムの径はチューブ外径規制用管
の内径以上に拡径されることはなく、ＯＡ機器に適した
寸法精度の高いチューブフィルムが得られる。さらに、
延伸及びアニーリングする操作において、温度を一定に
保持できるので、適切なアニーリングを施すことが可能
となり、耐熱性チューブフィルムの充分な物性向上を図
ることができる。また、作成されるチューブフィルム間
のばらつきも小さくなる。According to the production method of the present invention, since the stretching step and the annealing step are not performed in two steps, not only the production can be facilitated but also the shrinkage of the film due to the annealing as in the conventional method can be achieved. You don't have to think. Since the tube is stretched in a state of being regulated by the tube outer diameter regulating tube, the diameter of the tube film is not expanded beyond the inner diameter of the tube outer diameter regulating tube, and a tube with high dimensional accuracy suitable for OA equipment. A film is obtained. further,
In the operation of stretching and annealing, the temperature can be kept constant, so that appropriate annealing can be performed and the physical properties of the heat resistant tube film can be sufficiently improved. In addition, variations among the produced tube films are reduced.
【００２８】本発明の製造装置は、以上のような効果を
もたらす本発明の製造方法を容易に実施できる。The manufacturing apparatus of the present invention can easily carry out the manufacturing method of the present invention which brings about the above effects.
【図１】本発明の製造方法を説明するための図である。FIG. 1 is a diagram for explaining a manufacturing method of the present invention.
【図２】本発明の製造方法を説明するための図である。FIG. 2 is a diagram for explaining the manufacturing method of the present invention.
【図３】本発明の製造方法を説明するための図である。FIG. 3 is a diagram for explaining the manufacturing method of the present invention.
【図４】本発明の製造方法を説明するための図である。FIG. 4 is a diagram for explaining the manufacturing method of the present invention.
１ チューブ外径規制用管 ２ バンドヒータ ３ 加熱用管 ５ チューブ状未延伸フィルム ５’ 耐熱性チューブフィルム ６ 閉塞端 ７ 開口端 ９ 吹込口 1 Tube Outer Diameter Controlling Tube 2 Band Heater 3 Heating Tube 5 Tubular Unstretched Film 5'Heat Resistant Tube Film 6 Closing End 7 Opening End 9 Blowing Port
Claims (4)
チューブ状未延伸フィルムを、所定の内径を有するチュ
ーブ外径規制用管に挿入し、 予め所定温度に設定したチューブ加熱手段に、前記チュ
ーブ外径規制用管を挿入し、 次いで、前記チューブ状未延伸フィルムの他端の開口部
から加圧媒体を供給して、前記チューブ状未延伸フィル
ムを前記チューブ外径規制用管で規制されるまで周方向
に延伸することを特徴とする耐熱性チューブフィルムの
製造方法。1. A tube-shaped unstretched film made of a thermoplastic resin, one end of which is closed, is inserted into a tube outer diameter regulating tube having a predetermined inner diameter, and the tube is heated by a tube heating means set to a predetermined temperature in advance. An outer diameter regulating tube is inserted, and then a pressure medium is supplied from the opening at the other end of the tubular unstretched film to regulate the tubular unstretched film with the tube outer diameter regulating tube. A method for producing a heat-resistant tube film, which comprises stretching up to the circumferential direction.
円筒状のチューブ加熱手段を用いて、 前記チューブ外径規制用管と前記チューブ加熱手段とを
相対的に移動させることを特徴とする請求項１に記載の
耐熱性チューブフィルムの製造方法。2. The tube outer diameter regulating tube and the tube heating means are relatively moved by using a cylindrical tube heating means shorter than the length of the tube outer diameter regulating tube. The method for producing the heat resistant tube film according to claim 1.
熱手段との相対的移動速度を、チューブ状未延伸フィル
ムの熱処理時間に応じて調節することを特徴とする請求
項２に記載の耐熱性チューブフィルムの製造方法。3. The heat resistance according to claim 2, wherein the relative moving speed of the tube outer diameter regulating tube and the tube heating means is adjusted according to the heat treatment time of the tubular unstretched film. Tube film manufacturing method.
ィルムの拡径を規制するチューブ外径規制用管と、 該チューブ外径規制用管が挿脱可能で、且つ前記チュー
ブ外径規制用管を等方向に加熱するチューブ加熱手段と
を備えたことを特徴とする耐熱性チューブフィルムの製
造装置。4. A tube outer diameter regulating tube for regulating the diameter expansion of a tubular unstretched film by stretching in the circumferential direction, and a tube outer diameter regulating tube which can be inserted and removed and said tube outer diameter regulating tube. An apparatus for manufacturing a heat-resistant tube film, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15379992A JPH05338024A (en) | 1992-06-12 | 1992-06-12 | Method and apparatus for producing heat-resistant tubular film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15379992A JPH05338024A (en) | 1992-06-12 | 1992-06-12 | Method and apparatus for producing heat-resistant tubular film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05338024A true JPH05338024A (en) | 1993-12-21 |
Family
ID=15570385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15379992A Pending JPH05338024A (en) | 1992-06-12 | 1992-06-12 | Method and apparatus for producing heat-resistant tubular film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05338024A (en) |
-
1992
- 1992-06-12 JP JP15379992A patent/JPH05338024A/en active Pending
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