JPH11268058A - Molding die and its production - Google Patents
Molding die and its productionInfo
- Publication number
- JPH11268058A JPH11268058A JP7948498A JP7948498A JPH11268058A JP H11268058 A JPH11268058 A JP H11268058A JP 7948498 A JP7948498 A JP 7948498A JP 7948498 A JP7948498 A JP 7948498A JP H11268058 A JPH11268058 A JP H11268058A
- Authority
- JP
- Japan
- Prior art keywords
- endless belt
- mold
- polyimide
- temperature
- polyimide endless
- 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.)
- Granted
Links
Landscapes
- Dry Development In Electrophotography (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
- Physical Vapour Deposition (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、複写機、プリンタ
ー、ファクシミリ等の静電複写装置において中間トナー
担持体として用いられる無端ベルトを成形するための成
形型及びその製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold for molding an endless belt used as an intermediate toner carrier in an electrostatic copying machine such as a copying machine, a printer, and a facsimile, and a method of manufacturing the same.
【０００２】[0002]
【従来の技術】静電複写装置において中間トナー担持体
として用いられる無端ベルトは、耐熱性、難燃性、引っ
張り強さ、曲げ強さ、電気安定性等の性質が要求される
ので、ポリイミド等の材料により形成されている。この
ような無端ベルトは、遠心塗布成形法により成形されて
いる。遠心塗布成形法は、回転するアルミニウム、真
鍮、ステンレス等より構成される円筒形の成形型の内面
にスプレー塗布等の手段により樹脂溶液を流し込み、そ
の遠心力で塗布液を軸方向に拡げて均一な円筒形の膜を
形成し、そして、この円筒形の膜を乾燥固化した後取り
出すものである。2. Description of the Related Art An endless belt used as an intermediate toner carrier in an electrostatic copying machine is required to have properties such as heat resistance, flame retardancy, tensile strength, bending strength, and electrical stability. Is formed. Such an endless belt is formed by a centrifugal coating method. In the centrifugal coating molding method, a resin solution is poured into the inner surface of a cylindrical mold made of rotating aluminum, brass, stainless steel, etc. by means of spray coating, etc. A cylindrical film is formed, and the cylindrical film is dried, solidified, and taken out.
【０００３】ポリイミドは、接着性が良いために接着剤
としても使用されるほどの樹脂であるため、ポリイミド
を直接遠心塗布成形してポリイミド無端ベルトを成形す
ることはできない。そのために、従来においては、例え
ば、ポリイミドの前駆体であるポリアミド酸の溶液をス
テンレス等の円筒成形型に遠心塗布して円筒膜を成形
し、これを加熱してイミド化することにより、ポリイミ
ド無端ベルトを成形していた。ポリアミド酸の溶液は、
例えば、無水ピロメリット酸及び４，４´−ジアミノジ
フェニルエーテルよりなる２種のモノマーをジメチルホ
ルムアミドのような極性溶媒中で溶液重合させることに
より得ている。[0003] Since polyimide is a resin which is used as an adhesive because of its good adhesiveness, it is not possible to form a polyimide endless belt by directly centrifuging and molding polyimide. For this purpose, conventionally, for example, a solution of polyamic acid, which is a precursor of polyimide, is centrifugally applied to a cylindrical mold such as stainless steel to form a cylindrical film, which is heated and imidized to obtain a polyimide endless. The belt was being formed. The solution of polyamic acid is
For example, it is obtained by solution polymerization of two kinds of monomers consisting of pyromellitic anhydride and 4,4'-diaminodiphenyl ether in a polar solvent such as dimethylformamide.
【０００４】このような遠心塗布成形されたポリアミド
酸よりなる円筒膜は、溶剤乾燥が不十分であると柔らか
くて成形型からの取り出す際に破れてしまい、また、溶
剤乾燥し過ぎたり硬化し過ぎると成形型に密着し過ぎて
成形型から取り出す際に破れが生じてしまうという問題
があった。そこで、このような問題を解決するために、
従来においては、遠心塗布成形されたポリアミド酸（ポ
リアミック酸ともよばれている）よりなる円筒膜を、適
度に乾燥した後、細心の注意を払って成形型から取り出
し、次に、この円筒膜の中に硬化するための円筒硬化型
を挿入してから、該円筒膜を加熱硬化することにより、
最終的にポリイミド無端ベルトを作成していた。[0004] If the solvent is insufficiently dried, such a cylindrical film made of a polyamic acid formed by centrifugal coating is soft and breaks when it is taken out of a mold, and the solvent is too dry or too hard. In addition, there is a problem that the film is too closely adhered to the mold and tears when the mold is removed from the mold. So, in order to solve such a problem,
Conventionally, a cylindrical film made of a polyamic acid (also referred to as polyamic acid) formed by centrifugal coating is appropriately dried, taken out of a molding die with great care, and then placed in the cylindrical film. By inserting a cylindrical curing type for curing into, and then heating and curing the cylindrical film,
Finally, a polyimide endless belt was produced.
【０００５】また、円筒成形型の内側表面に予め離型膜
を被覆した円筒形の成形型を用いて円筒膜を加熱硬化し
た後、該離型膜をその融点以上に保持して円筒成形型よ
り流出させることにより、円筒膜を円筒型より剥離し取
り出すことも提案されている（特開昭４８−９１１５９
号公報）。Further, after the cylindrical film is heated and cured by using a cylindrical mold in which a release film is previously coated on the inner surface of the cylindrical mold, the release film is kept at a temperature not lower than its melting point. It has also been proposed to remove the cylindrical film from the cylindrical mold by taking it out of the cylindrical mold (JP-A-48-91159).
No.).
【０００６】しかしながら、このような従来のポリイミ
ドよりなる無端ベルトの成形においては、乾燥条件を
一定にしているつもりでも、環境条件で円筒膜がうまく
剥離できず、そのために、円筒膜の取り出しができない
場合が発生したり、また、円筒膜を無理に取り出ししよ
うとすると該膜に破れが発生したりすること、円筒形
の成形型の径等が変更になると乾燥条件が全く変わって
しまうのでその条件出しを最初からする必要があるこ
と、成形型より剥離して取り出した円筒膜を円筒形の
硬化型で硬化させる際に加熱温度分布があると、円筒膜
がは均一に硬化収縮せずに部分的に皺となること、ポ
リイミド材料から無端ベルトが形成されるまでに複雑な
工程を取ること、前記〜のためにコストがかかる
こと、等の問題があった。However, in the molding of such conventional endless belts made of polyimide, even if the drying conditions are intended to be constant, the cylindrical film cannot be peeled off properly under environmental conditions, and therefore the cylindrical film cannot be taken out. In some cases, when the cylindrical film is forcibly taken out, the film may be torn, and when the diameter of the cylindrical mold is changed, the drying conditions will be completely changed. It is necessary to take out from the beginning, and if there is a heating temperature distribution when the cylindrical film peeled off from the mold and cured with a cylindrical curing mold, the cylindrical film will not uniformly cure and shrink There are problems such as wrinkles in the process, complicated steps taken before the endless belt is formed from the polyimide material, and cost increase due to the above.
【０００７】また、特開昭４８−９１１５９号公報に開
示されている従来技術をポリイミド無端ベルトの成形に
適用すると、ポリイミドよりなる円筒膜を円筒型より
剥離して取り出すことは良好であるが、被覆した離型膜
を円筒型より流出させるために、円筒型を繰り返し使用
するには適さないこと、ポリイミド無端ベルトの硬化
温度に適した融点を有する離型膜を選択しなければなら
ないので、その適用が限定されてしまうこと、円筒膜
の材料をポリイミドとすると３００℃程度の融点を有す
る剥離膜が必要になってくること、前記〜のため
にコストがかかること、等の問題があった。When the conventional technique disclosed in Japanese Patent Application Laid-Open No. 48-91159 is applied to the molding of a polyimide endless belt, it is good to peel off a cylindrical film made of polyimide from a cylindrical mold. To allow the coated release film to flow out of the cylindrical type, it is not suitable for repeated use of the cylindrical type, and a release film having a melting point suitable for the curing temperature of the polyimide endless belt must be selected. There are problems such as limited application, the need for a release film having a melting point of about 300 ° C. when polyimide is used as the material of the cylindrical film, and the increase in cost due to the above.
【０００８】本発明は、かかる問題を解決することを目
的としている。即ち、本発明は、ポリイミド無端状ベル
トをその形状を変化させないで容易に離型して取り出す
ことができる成形型及びその製造方法を低コストで提供
することを目的とする。An object of the present invention is to solve such a problem. That is, an object of the present invention is to provide a molding die capable of easily releasing and removing a polyimide endless belt without changing its shape, and a method of manufacturing the same at low cost.
【０００９】[0009]
【課題を解決するための手段】本発明者は、ポリイミド
無端ベルトを成形する円筒形の成形型の内側表面にポリ
イミド無端ベルトのイミド化温度以上の温度でイミド化
したポリイミドで構成される離型膜を設けたところ、ポ
リイミド無端ベルトをその形状を変化させないで容易に
離型して取り出すことができることを見出して、本発明
を完成させるに至った。Means for Solving the Problems The present inventor has disclosed a mold release mold composed of polyimide imidized at a temperature equal to or higher than the imidization temperature of the polyimide endless belt on the inner surface of a cylindrical mold for molding the polyimide endless belt. When the film was provided, it was found that the polyimide endless belt could be easily released and removed without changing its shape, and the present invention was completed.
【００１０】即ち、本第１発明は、ポリイミド無端ベル
トを成形する円筒形の成形型であって、該成形型がその
内側表面にポリイミド無端ベルトのイミド化温度以上の
温度でイミド化したポリイミドで構成される離型膜を有
することを特徴とする成形型である。That is, the first invention is a cylindrical molding die for molding a polyimide endless belt, wherein the molding die has an inner surface made of polyimide imidized at a temperature equal to or higher than the imidization temperature of the polyimide endless belt. It is a mold having a release film configured.
【００１１】第２発明は、第１発明において、離型膜が
ポリイミド無端ベルトのイミド化温度である２８０〜３
００℃以上の温度でイミド化したポリイミドで構成され
る膜であることを特徴とするものである。[0011] In a second aspect of the present invention, in the first aspect, the release film has an imidization temperature of 280 to 3 which is a polyimide endless belt.
The film is characterized by being a film composed of polyimide imidized at a temperature of 00 ° C. or more.
【００１２】第３発明は、ポリイミド無端ベルトを成形
する円筒形の成形型の製造において、該成形型の内側表
面にポリアミド酸溶液を塗布した後これをポリイミド無
端ベルトのイミド化温度以上の温度に加熱してイミド化
することにより離型膜を形成することを特徴とする成形
型の製造方法である。According to a third aspect of the invention, in the production of a cylindrical mold for molding a polyimide endless belt, a polyamic acid solution is applied to the inner surface of the mold and then heated to a temperature higher than the imidization temperature of the polyimide endless belt. This is a method for producing a mold, comprising forming a release film by imidization by heating.
【００１３】第４発明は、第３発明において、離型膜を
ポリイミド無端ベルトのイミド化温度である２８０〜３
００℃以上の温度でイミド化することを特徴とするもの
である。[0013] In a fourth aspect based on the third aspect, the release film is formed at 280 to 3 which is the imidization temperature of the polyimide endless belt.
It is characterized in that it is imidized at a temperature of 00 ° C. or higher.
【００１４】第５発明は、ポリイミド無端ベルトを成形
する円筒形の成形型の製造において、該成形型の内側表
面にテトラカルボン酸無水物及びジアミンを塗布する際
又は塗布した後ポリイミド無端ベルトのイミド化温度以
上の温度に加熱してイミド化することにより離型膜を形
成することを特徴とする成形型の製造方法である。A fifth aspect of the present invention relates to a method of manufacturing a cylindrical mold for molding a polyimide endless belt, when applying or after applying tetracarboxylic anhydride and diamine to the inner surface of the mold. A method for manufacturing a molding die, characterized in that a release film is formed by imidization by heating to a temperature equal to or higher than the formation temperature.
【００１５】第６発明は、第５発明において、テトラカ
ルボン酸無水物及びジアミンを真空蒸着により塗布する
ことを特徴とするものである。A sixth invention is characterized in that, in the fifth invention, a tetracarboxylic anhydride and a diamine are applied by vacuum evaporation.
【００１６】[0016]
【発明の実施の形態】図１は、本発明の一実施の形態を
示すポリイミド無端ベルトを成形する円筒形の成形型の
縦断面である。図１に示されるように、本発明における
離型膜２は、ポリアミド酸をポリイミド無端ベルト３を
成形する円筒形の成形型１の内側表面に塗布した後これ
をポリイミド無端ベルト３のイミド化温度以上の温度に
加熱してイミド化するか、或いは、無水ピロメリット酸
等のテトラカルボン酸無水物及び４，４´−ジアミノジ
フェニルエーテル等のジアミンよりなる２種のモノマー
をポリイミド無端ベルト３を成形する円筒形の成形型１
の内側表面に塗布する際又は塗布した後これをポリイミ
ド無端ベルト３のイミド化温度以上の温度に加熱してイ
ミド化することにより形成される。前記無水ピロメリッ
ト酸等のテトラカルボン酸無水物及び４，４´−ジアミ
ノジフェニルエーテル等のジアミンの塗布は、真空蒸着
により行うこともできる。FIG. 1 is a longitudinal sectional view of a cylindrical mold for molding an endless polyimide belt according to an embodiment of the present invention. As shown in FIG. 1, the release film 2 of the present invention is obtained by applying a polyamic acid to the inner surface of a cylindrical mold 1 for forming a polyimide endless belt 3 and then applying the polyamide acid to the imidization temperature of the polyimide endless belt 3. The polyimide endless belt 3 is formed by imidizing by heating to the above temperature, or by using two kinds of monomers consisting of tetracarboxylic anhydride such as pyromellitic anhydride and diamine such as 4,4'-diaminodiphenyl ether. Cylindrical mold 1
When or after the application to the inner surface of the polyimide, it is formed by heating to a temperature equal to or higher than the imidization temperature of the polyimide endless belt 3 and imidizing. The application of the tetracarboxylic anhydride such as pyromellitic anhydride and the diamine such as 4,4'-diaminodiphenyl ether can also be performed by vacuum evaporation.
【００１７】本発明においては、ポリイミド無端ベルト
３のイミド化温度、即ち、ポリイミド無端ベルト３を成
形する円筒形の成形型１の内側表面に塗布したポリアミ
ド酸をイミド化してポリイミド無端ベルト３を形成する
温度、或いは、ポリイミド無端ベルト３を成形する円筒
形の成形型１の内側表面に塗布した無水ピロメリット酸
等のテトラカルボン酸無水物及び４，４´−ジアミノジ
フェニルエーテル等のジアミンよりなる２種のモノマー
の混合膜をイミド化してポリイミド無端ベルト３を形成
する温度を、例えば、２８０〜３００℃に設定すると、
その離型膜２のイミド化温度は、２８０〜３００℃より
も高い温度、例えば、３１０℃である。ここに記載した
離型膜２のイミド化温度は、あくまでも、本発明の一実
施の形態であるので、設定するポリイミド無端ベルト３
のイミド化温度を考慮して、前記温度とは別の温度を選
択することもできる。In the present invention, the polyimide endless belt 3 is formed by imidizing the polyamide endless belt 3 by imidizing the polyamide acid applied to the inner surface of the cylindrical mold 1 for forming the polyimide endless belt 3. Or two kinds of dicarboxylic acids such as tetracarboxylic anhydride such as pyromellitic anhydride and 4,4'-diaminodiphenyl ether applied to the inner surface of the cylindrical mold 1 for molding the polyimide endless belt 3 When the temperature at which the mixed film of the monomers is imidized to form the polyimide endless belt 3 is set to, for example, 280 to 300 ° C.,
The imidization temperature of the release film 2 is a temperature higher than 280 to 300 ° C., for example, 310 ° C. Since the imidization temperature of the release film 2 described here is merely an embodiment of the present invention, the polyimide endless belt 3 to be set is set.
In consideration of the imidation temperature of the above, a temperature different from the above-mentioned temperature may be selected.
【００１８】[0018]
【実施例】（実施例１）ポリイミド前駆体のポリアミド
酸（東レ社製、トレニース＃３０００）をＮ，Ｎ−ジメ
チルアセトアミド（ＤＭＡＣ）で３０％に希釈した溶液
を円筒形のアルミニウム製成形型の内側に該成形型を低
速に回転させながら塗布し、続いて、成形型を高速に回
転して塗布膜を均一な膜に成形した。この膜を乾燥させ
て溶媒を除去した後３１０℃に加熱してポリアミド酸を
イミド化することにより離型膜を形成した。(Example 1) A solution obtained by diluting polyamic acid (Trenice # 3000, manufactured by Toray Industries, Inc.) to a concentration of 30% with N, N-dimethylacetamide (DMAC) to a cylindrical aluminum mold was prepared. The coating was applied to the inside while rotating the mold at a low speed, and then the mold was rotated at a high speed to form a uniform coating film. The film was dried to remove the solvent, and then heated to 310 ° C. to imidize the polyamic acid to form a release film.
【００１９】このように形成した離型膜を有する円筒形
の成形型を低速で回転させながら、その内側にポリアミ
ド酸（東レ社製、トレニース＃３０００）をＤＭＡＣで
３０％に希釈した溶液を塗布し、続いて、成形型を高速
に回転して塗布膜を均一な膜に成形した。この膜を乾燥
させ溶媒を除去した後２８０℃に加熱して、ポリアミド
酸をイミド化することにより、ポリイミド無端ベルトを
形成した。このポリイミド無端ベルトを冷却した後、そ
の端部を離型膜よりゆっくりと剥がすと、剥がれたポリ
イミド無端ベルトは、ゆっくりと滑り落ちてきたが、離
型膜は、円筒形の成形型の内側に付着したままであっ
た。この円筒形の成形型を繰り返し使用してポリイミド
無端ベルトを形成したが、再現性よくポリイミド無端ベ
ルトが形成できた。While the cylindrical mold having the release film thus formed is rotated at a low speed, a solution prepared by diluting a polyamic acid (Trenice # 3000, manufactured by Toray Industries, Inc.) to 30% with DMAC is applied to the inside thereof. Subsequently, the mold was rotated at a high speed to form the coating film into a uniform film. After drying the film and removing the solvent, the film was heated to 280 ° C. to imidize the polyamic acid to form a polyimide endless belt. After cooling this polyimide endless belt, the end was slowly peeled off from the release film. It remained attached. A polyimide endless belt was formed by repeatedly using this cylindrical mold, but a polyimide endless belt could be formed with good reproducibility.
【００２０】（実施例２）実施例１と同様に形成した剥
離膜を有する円筒形の成形型に実施例１と同一のポリア
ミド酸溶液を塗布し、これを３００℃に加熱して、ポリ
アミド酸をイミド化することにより、ポリイミド無端ベ
ルトを形成した。このポリイミド無端ベルトを冷却した
後、その端部を離型膜よりゆっくりと剥がすと、剥がれ
たポリイミド無端ベルトは、ゆっくりと滑り落ちてきた
が、離型膜は、円筒形の成形型の内側に付着したままで
あった。この円筒形の成形型を繰り返し使用してポリイ
ミド無端ベルトを形成したが、再現性よくポリイミド無
端ベルトが形成できた。Example 2 The same polyamic acid solution as in Example 1 was applied to a cylindrical mold having a release film formed in the same manner as in Example 1, and this was heated to 300 ° C. Was imidated to form a polyimide endless belt. After cooling this polyimide endless belt, the end was slowly peeled off from the release film. It remained attached. A polyimide endless belt was formed by repeatedly using this cylindrical mold, but a polyimide endless belt could be formed with good reproducibility.
【００２１】（実施例３）真空蒸着装置の内部で円筒形
のアルミニウム製成形型の内面に無水ピロメリット酸及
び４，４´−ジアミノジフェニルエーテルよりなる２種
のモノマーのそれぞれの蒸着源を加熱してこれらのモノ
マーの混合膜を形成した。真空蒸着装置内を常圧に戻し
た後、この形成された混合膜を徐々に加熱しながら最終
温度を３１０℃に保持した脱水重合反応を起こさせるこ
とにより離型膜を形成した。このように形成した離型膜
を有する円筒形の成形型に実施例１と同様にポリアミド
酸溶液を塗布して膜を形成し、この膜を乾燥させ溶媒を
除去した後２８０℃に加熱して、ポリアミド酸をイミド
化することにより、ポリイミド無端ベルトを形成した。
このポリイミド無端ベルトを冷却した後、その端部を離
型膜よりゆっくりと剥がすと、剥がれたポリイミド無端
ベルトは、ゆっくりと滑り落ちてきたが、離型膜は、円
筒形の成形型の内側に付着したままであった。この円筒
形の成形型を繰り返し使用してポリイミド無端ベルトを
形成したが、再現性よくポリイミド無端ベルトが形成で
きた。(Embodiment 3) Inside of a vacuum evaporation apparatus, two evaporation sources of pyromellitic anhydride and 4,4'-diaminodiphenyl ether were heated on the inner surface of a cylindrical aluminum mold. Thus, a mixed film of these monomers was formed. After the inside of the vacuum deposition apparatus was returned to normal pressure, a release film was formed by causing a dehydration polymerization reaction while maintaining the final temperature at 310 ° C. while gradually heating the formed mixed film. A polyamic acid solution was applied to a cylindrical mold having the release film thus formed in the same manner as in Example 1 to form a film. The film was dried, the solvent was removed, and then heated to 280 ° C. By imidizing the polyamic acid, a polyimide endless belt was formed.
After cooling this polyimide endless belt, the end was slowly peeled off from the release film. It remained attached. A polyimide endless belt was formed by repeatedly using this cylindrical mold, but a polyimide endless belt could be formed with good reproducibility.
【００２２】（比較例１）実施例１と同様に形成した離
型膜を有する円筒形の成形型に実施例１と同一のポリア
ミド酸溶液を塗布して膜を形成し、この膜を乾燥させ溶
媒を除去した後３２０℃に加熱して、ポリアミド酸をイ
ミド化することにより、ポリイミド無端ベルトを形成し
た。このポリイミド無端ベルトを冷却した後、その端部
を離型膜よりゆっくりと剥がしたが、ポリイミド無端ベ
ルトは、剥離膜に強固に付着してしまい、無理に剥がす
と剥離膜も破けて一緒に剥離してしまった。Comparative Example 1 The same polyamic acid solution as in Example 1 was applied to a cylindrical mold having a release film formed in the same manner as in Example 1 to form a film, and the film was dried. After removing the solvent, the mixture was heated to 320 ° C. to imidize the polyamic acid, thereby forming a polyimide endless belt. After cooling this polyimide endless belt, its end was slowly peeled off from the release film, but the polyimide endless belt adhered firmly to the release film, and if it was forcibly peeled off, the release film also broke and peeled off together have done.
【００２３】（比較例２）実施例１と同様に形成した離
型膜を有する円筒形の成形型に実施例１と同一のポリア
ミド酸溶液を塗布して膜を形成し、この膜を乾燥させ溶
媒を除去した後３５０℃に加熱して、ポリアミド酸をイ
ミド化することにより、ポリイミド無端ベルトを形成し
た。このポリイミド無端ベルトを冷却した後、その端部
を離型膜よりゆっくりと剥がしたが、ポリイミド無端ベ
ルトは、剥離膜に強固に付着してしまい、無理に剥がす
と剥離膜も破けて一緒に剥離してしまった。Comparative Example 2 The same polyamic acid solution as in Example 1 was applied to a cylindrical mold having a release film formed in the same manner as in Example 1 to form a film, and this film was dried. After removing the solvent, the mixture was heated to 350 ° C. to imidize the polyamic acid, thereby forming a polyimide endless belt. After cooling this polyimide endless belt, its end was slowly peeled off from the release film, but the polyimide endless belt adhered firmly to the release film, and if it was forcibly peeled off, the release film also broke and peeled off together have done.
【００２４】（比較例３）実施例３と同様に円筒形のア
ルミニウム製成形型の内面に無水ピロメリット酸及び
４，４´−ジアミノジフェニルエーテルよりなる２種の
モノマーの混合膜を形成した。真空蒸着装置内を常圧に
戻した後、この形成された混合膜を徐々に加熱しながら
最終温度を２５０℃に保持して脱水重合反応を起こさせ
ることにより離型膜を形成した。このように形成した離
型膜を有する円筒形の成形型に実施例１と同様にポリア
ミド酸溶液を塗布して膜を形成し、この膜を乾燥させ溶
媒を除去した後２８０℃に加熱して、ポリアミド酸をイ
ミド化することにより、ポリイミド無端ベルトを形成し
た。このポリイミド無端ベルトを冷却した後、その端部
を離型膜よりゆっくりと剥がしたが、ポリイミド無端ベ
ルトは、剥離膜に強固に付着してしまい、無理に剥がす
と剥離膜も破けて一緒に剥離してしまった。Comparative Example 3 In the same manner as in Example 3, a mixed film of two kinds of monomers consisting of pyromellitic anhydride and 4,4'-diaminodiphenyl ether was formed on the inner surface of a cylindrical aluminum mold. After the inside of the vacuum deposition apparatus was returned to normal pressure, the final temperature was kept at 250 ° C. while gradually heating the formed mixed film to cause a dehydration polymerization reaction, thereby forming a release film. A polyamic acid solution was applied to a cylindrical mold having the release film thus formed in the same manner as in Example 1 to form a film. The film was dried, the solvent was removed, and then heated to 280 ° C. By imidizing the polyamic acid, a polyimide endless belt was formed. After cooling this polyimide endless belt, its end was slowly peeled off from the release film, but the polyimide endless belt adhered firmly to the release film, and if it was forcibly peeled off, the release film also broke and peeled off together have done.
【００２５】以上、本発明の作用を説明すると次のとお
りとなる。本第１〜４発明によれば、円筒形の成形型
は、その内側表面にポリイミド無端ベルトのイミド化温
度、例えば、２８０〜３００℃以上の温度でイミド化し
たポリイミドで構成される離型膜を有しているので、ポ
リイミド無端状ベルトを、その形状の変化、即ち、皺、
破れ等による形状の変化、をさせないで、容易に離型し
て取り出すことができ、しかも、繰り返し安定して使用
することができる。その理由は、このように２８０〜３
００℃以上の温度でイミド化したポリイミドで構成され
る離型膜は、ポリイミド無端ベルトに対してほとんど密
着力を持たないからである。The operation of the present invention will be described below. According to the first to fourth aspects of the present invention, the cylindrical mold has a mold release film composed of polyimide imidized at the imidization temperature of an endless polyimide belt, for example, at a temperature of 280 to 300 ° C. or more, on the inner surface thereof. Since the polyimide endless belt has a shape change, i.e., wrinkles,
The mold can be easily separated and taken out without causing a change in shape due to breakage or the like, and can be used repeatedly and stably. The reason is that 280-3
This is because a release film composed of polyimide imidized at a temperature of 00 ° C. or higher has almost no adhesion to the polyimide endless belt.
【００２６】本第５〜６発明によれば、テトラカルボン
酸無水物及びジアミンよりなる２つのモノマーを用いる
ので、乾式塗布が可能となり、そのために、円筒形の成
形型の内側への塗布が容易となる。また、２つのモノマ
ーの混合膜は、真空蒸着により形成することができる。
その際、イミド化温度以上に加熱すると重合の過程まで
一気に進めることができる。According to the fifth and sixth aspects of the present invention, since two monomers consisting of a tetracarboxylic anhydride and a diamine are used, dry coating is possible, and therefore, coating on the inside of a cylindrical mold is easy. Becomes Further, a mixed film of two monomers can be formed by vacuum evaporation.
At that time, heating to an imidization temperature or higher allows the process of polymerization to proceed at a stretch.
【００２７】[0027]
【発明の効果】ポリイミド無端状ベルトを、その形状の
変化をさせないで、容易に離型して取り出すことができ
る成形型及びその製造方法を低コストで提供することが
できる。According to the present invention, it is possible to provide a molding die capable of easily releasing a polyimide endless belt without changing its shape without changing its shape, and a method of manufacturing the same at low cost.
【図１】本発明の一実施の形態を示すポリイミド無端ベ
ルトを成形する円筒形の成形型の縦断面である。FIG. 1 is a longitudinal section of a cylindrical mold for molding a polyimide endless belt according to an embodiment of the present invention.
１ 円筒形の成形型 ２ 離型膜 ３ ポリイミド無端ベルト DESCRIPTION OF SYMBOLS 1 Cylindrical forming mold 2 Release film 3 Polyimide endless belt
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ // Ｃ２３Ｃ 14/12 Ｃ２３Ｃ 14/12 Ｂ２９Ｋ 77:00 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code FI // C23C 14/12 C23C 14/12 B29K 77:00
Claims (6)
の成形型であって、該成形型がその内側表面にポリイミ
ド無端ベルトのイミド化温度以上の温度でイミド化した
ポリイミドで構成される離型膜を有することを特徴とす
る成形型。A mold for forming a polyimide endless belt, wherein the mold has a mold release film formed on its inner surface by polyimide imidized at a temperature equal to or higher than the imidization temperature of the polyimide endless belt. A molding die having:
化温度である２８０〜３００℃以上の温度でイミド化し
たポリイミドで構成される膜であることを特徴とする請
求項１記載の成形型。2. The mold according to claim 1, wherein the release film is a film composed of polyimide imidized at a temperature of 280 to 300 ° C. or higher, which is the imidization temperature of the polyimide endless belt.
の成形型の製造において、該成形型の内側表面にポリア
ミド酸溶液を塗布した後これをポリイミド無端ベルトの
イミド化温度以上の温度に加熱してイミド化することに
より離型膜を形成することを特徴とする成形型の製造方
法。3. In the manufacture of a cylindrical mold for molding a polyimide endless belt, a polyamic acid solution is applied to the inner surface of the mold and then heated to a temperature equal to or higher than the imidization temperature of the polyimide endless belt. A method for producing a mold, comprising forming a release film by imidization.
化温度である２８０〜３００℃以上の温度でイミド化す
ることを特徴とする請求項３記載の成形型の製造方法。4. The method for producing a mold according to claim 3, wherein the release film is imidized at a temperature of 280 to 300 ° C. or higher, which is the imidization temperature of the polyimide endless belt.
の成形型の製造において、該成形型の内側表面にテトラ
カルボン酸無水物及びジアミンを塗布する際又は塗布し
た後ポリイミド無端ベルトのイミド化温度以上の温度に
加熱してイミド化することにより離型膜を形成すること
を特徴とする成形型の製造方法。5. In the production of a cylindrical mold for molding a polyimide endless belt, when the tetracarboxylic anhydride and diamine are applied to the inner surface of the mold or after the application, the temperature is equal to or higher than the imidization temperature of the polyimide endless belt. A mold release film formed by heating to a temperature of 2 and imidizing the mold.
真空蒸着により塗布することを特徴とする請求項５記載
の成形型の製造方法。6. The method according to claim 5, wherein the tetracarboxylic anhydride and the diamine are applied by vacuum evaporation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7948498A JP3976392B2 (en) | 1998-03-26 | 1998-03-26 | Polyimide coating mold and manufacturing method thereof, and manufacturing method of polyimide endless belt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7948498A JP3976392B2 (en) | 1998-03-26 | 1998-03-26 | Polyimide coating mold and manufacturing method thereof, and manufacturing method of polyimide endless belt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11268058A true JPH11268058A (en) | 1999-10-05 |
| JP3976392B2 JP3976392B2 (en) | 2007-09-19 |
Family
ID=13691180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7948498A Expired - Fee Related JP3976392B2 (en) | 1998-03-26 | 1998-03-26 | Polyimide coating mold and manufacturing method thereof, and manufacturing method of polyimide endless belt |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3976392B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010201890A (en) * | 2009-03-06 | 2010-09-16 | Nippon Steel Chem Co Ltd | Method of manufacturing polyimide film |
| US8309172B2 (en) | 2007-06-12 | 2012-11-13 | Ricoh Company, Ltd. | Method and device for coating hollow cylindrical member |
-
1998
- 1998-03-26 JP JP7948498A patent/JP3976392B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8309172B2 (en) | 2007-06-12 | 2012-11-13 | Ricoh Company, Ltd. | Method and device for coating hollow cylindrical member |
| JP2010201890A (en) * | 2009-03-06 | 2010-09-16 | Nippon Steel Chem Co Ltd | Method of manufacturing polyimide film |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3976392B2 (en) | 2007-09-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH07178741A (en) | Polyimide composite tubular object and method and device for production thereof | |
| JPS6216168B2 (en) | ||
| JP3103084B2 (en) | Manufacturing method for tubular objects | |
| JPH0725125B2 (en) | Method for manufacturing polyimide film | |
| JP3976392B2 (en) | Polyimide coating mold and manufacturing method thereof, and manufacturing method of polyimide endless belt | |
| JP3947994B2 (en) | Polyimide film, its production method and use | |
| JP4057708B2 (en) | Coating type and endless belt manufacturing method | |
| JP2912922B2 (en) | Manufacturing method for tubular objects | |
| JP2007160704A (en) | Method for manufacturing high rigidity film | |
| JP2680894B2 (en) | Method for manufacturing tubular products | |
| JPH06313055A (en) | Production of surface-roughened polyimide film | |
| JPH0582289B2 (en) | ||
| JPH0243046A (en) | Composite tubular matter and manufacture thereof | |
| JP3226326B2 (en) | Manufacturing method of composite tubular material | |
| JP3633783B2 (en) | Manufacturing method of high rigidity film | |
| JPS6140166B2 (en) | ||
| JP2001079861A (en) | Method for forming cylindrical polyimide film | |
| JP2625021B2 (en) | Deformed tubular article and its manufacturing method | |
| JP3904343B2 (en) | Endless belt forming method | |
| JP2001252926A (en) | Cylindrical mold, method of manufacturing the same, and method for manufacturing cylindrical film | |
| JP4768249B2 (en) | Cylindrical curing mold for forming polyimide cylindrical cured film from demolded polyamic acid cylindrical coating film, and method for producing polyimide cylindrical cured film using the same | |
| JP2001018192A (en) | Synthetic resin cylindrical film cutting method and cylindrical molding die for cutting synthetic resin cylindrical film | |
| JP2003039457A (en) | Method for manufacturing polyimide tubular body | |
| JP2000271946A (en) | Manufacture of seamless belt | |
| JP2005066839A (en) | Cylindrical member made of polyimide resin and its manufacturing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20040830 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20041012 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20041130 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20060815 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20060929 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20070612 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20070619 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100629 Year of fee payment: 3 |
|
| R150 | Certificate of patent (=grant) or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110629 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110629 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120629 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130629 Year of fee payment: 6 |
|
| LAPS | Cancellation because of no payment of annual fees |