JP3757548B2 - Spiral tubular product and method for producing the same - Google Patents
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Description
【０００１】
【発明の属する技術分野】
この発明は、パイプとの密着性が良く、熱効率の良好なヒ−タ−などの用途に好適で、特に半導体製造装置や分析機器などのパイプの保温、保護、絶縁性等の目的に使用できる形状保持性のスパイラル管状物に関する。
また、この発明は、スパイラル状に巻いた内側層となるテ−プ状耐熱性樹脂フィルムと外側層となるテ−プ状耐熱性樹脂フィルムとその間に接着剤を配置し、接着剤を硬化して積層一体化させるスパイラル管状物の製造方法に関する。
【０００２】
【従来の技術】
従来、パイプや電線を保護する場合、絶縁性の粘着テ−プを巻きつけることが一般的に行われている。
【０００３】
【発明が解決しようとする課題】
しかし、上記のパイプや電線が装置と装置との間の狭いところに設けられる場合には、テ−プで巻き付けることが困難である。さらに耐熱性が要求される場合には、一般的な絶縁性粘着テ−プでは保護ができない。
この発明の目的は、被保護体に装着が容易で密着性が良く、形状保持性の良いスパイラル管状物およびその製造方法を提供することである。
【０００４】
【課題を解決するための手段】
この発明は、スパイラル状物の内側層を形成するテ−プ状耐熱性樹脂フィルムＡ、中間層を形成する接着剤層および外側層を形成するテ−プ状耐熱性樹脂フィルムＢの構成を有する形状保持性のスパイラル管状物に関するものである。また、この発明は、被保護体と同一外形状を有する長尺の形状付与部材に巻いた内側層となるテ−プ状耐熱性樹脂フィルムＡと外側層となるテ−プ状耐熱性樹脂製フィルムＢとその間に接着剤を配置し、フィルムの内側層と外側層とを重ねたまま接着剤を硬化して積層一体化させることを特徴とする前記のスパイラル管状物の製造方法に関する。
前記の形状保持性とは、長尺方向に２５０ｇの荷重を加えると伸び、荷重をなくすともとの状態に戻ることをいう。
【０００５】
【発明の実施の形態】
以下に本発明の好ましい態様を列記する。
１）スパイラル状物の内層側を形成するテ−プ状耐熱性樹脂フィルムＡおよび外側層を形成するテ−プ状耐熱性樹脂フィルムＢがそれぞれ厚み２５−２００μｍである上記のスパイラル管状物。
２）接着剤層が熱硬化性接着剤または熱可塑性接着剤である上記のスパイラル管状物。
３）テ−プ状耐熱性樹脂フィルムＡおよびテ−プ状耐熱性樹脂フィルムＢがテ−プ状芳香族ポリイミドフィルムである上記のスパイラル管状物。
【０００６】
以下、この発明について、図面も参考にして、詳しく説明する。
図１はスパイラル管状物の一例をスパイラル芯に平行に切断した一部断面図である。
図２はこの発明のスパイラル管状物の一例を示す斜視図である。
図３はこの発明のスパイラル管状物の一例の使用例を示す一部斜視図である。
【０００７】
図１において、形状保持性のスパイラル管状物１は、スパイラル状物の内側層を形成するテ−プ状耐熱性樹脂フィルムＡである２、中間層を形成する接着剤層３および外側層を形成するテ−プ状耐熱性樹脂フィルムＢである４が一体として設けられている。
【０００８】
図２において、形状保持性のスパイラル管状ヒ−タ−１は、スパイラル状物の内側層を形成するテ−プ状耐熱性樹脂フィルムＡである２、中間層を形成する接着剤層３および外側層を形成するテ−プ状耐熱性樹脂フィルムＢである４が一体として設けられている。
【０００９】
図３において、被被装着体ともいう１０を挿入可能なまでに形状保持性のスパイラル管状物間を押し拡げて被装着体１０をスパイラル管状物間に挿入し、次いで、被装着体１０をその状態に維持したままでスパイラル管状物１を図の矢印の方向に回転し、この回転につれて被装着体１０がスパイラル管状物１内に取り込まれるので、管状物１の軸方向に回転させるだけで比較的簡単・迅速に被装着体１０にスパイラル管状物１を装着することができ、しかも装着した後はスパイラル管状物１は元の形状に復帰するから、被装着体１０に均等にかつ整然と装着することができる。従って、例えば被装着体の両端部が大型の装置等に接続されて自由度がほとんどない場合でも、比較的容易にかつ迅速に被装着体１０に巻きつけることができる。また、スパイラル管状物の径を任意に設定できるため、自由度の少ない被装着体だけでなく自由度の大きい被装着体であっても、また径の大小にも制限を受けることなく、棒またはパイプ状であれば任意の被保護体に適用できるのである。
【００１０】
この発明のスパイラル管状物は、例えば、内側層となる接着剤付きのテ−プ状耐熱性樹脂フィルムＡを接着剤を外側にして金属製、例えばステンレス等の耐熱性の棒またはパイプなどの長尺の形状付与部材にスパイラル状に巻き付け、その上に外側層となる接着剤付きのテ−プ状耐熱性樹脂フィルムＢを接着剤を内側にしてスパイラル状に重ねて巻き付け、接着剤を硬化して積層一体化し、形成された積層体を棒またはパイプなどの長尺の形状付与部材から外して、スパイラル状に形状保持した成形品として得ることができる。接着剤はテ−プ状耐熱性樹脂Ａおよびテ−プ状耐熱性樹脂Ｂの両方に設けてもよく、片方のみに設けてもよい。この発明のスパイラル管状物は、常温で、好適には２００℃程度の高温に加熱した環境下においても、また被装着体に装着した後もほとんどスパイラル物の外径などの形状や均等・整然さに変化がなく形状保持される。
【００１１】
この発明におけるスパイラル状物の内側層を形成するテ−プ状耐熱性樹脂フィルムＡとしては、ガラス転移温度あるいは融点が１８０℃以上である芳香族ポリイミドあるいは芳香族ポリアミドからなり、好適には厚みが２５−２００μｍ、幅が３−５０ｍｍのテ−プ状フィルムが使用される。特に、５０−３００℃での線膨張係数（ＣＴＥ）が６０×１０-5ｃｍ／ｃｍ／℃（ｐｐｍで表示することもある）以下、その中でも特に３−５０×１０-5ｃｍ／ｃｍ／℃であって、引張弾性率が２００−１４００ｋｇ／ｍｍ2 である芳香族ポリイミドフィルムあるいは芳香族ポリアミドフィルムが好適に使用される。そのなかでも、吸水率が４％以下、特に３％以下である芳香族ポリイミドフィルムが好適に使用される。
【００１２】
前記の芳香族ポリイミドは、例えば３，３’，４，４’−ビフェニルテトラカルボン酸二無水物、ピロメリット酸二無水物、３，３’，４，４’−ベンゾフェノンテトラカルボン酸二無水物などの芳香族テトラカルボン酸二無水物とｐ−フェニレンジアミン、４，４’−ジアミノジフェニルエ−テルなどの芳香族ジアミンとを重合、イミド化して得られる。特に、芳香族ポリイミドとして３，３’，４，４’−ビフェニルテトラカルボン酸二無水物を芳香族テトラカルボン酸成分中１５モル％以上使用して得られるものが耐熱性、低線膨張係数、低吸水率であることから好ましい。
前記の芳香族ポリアミドは、例えば２−クロロテレフタル酸クロリド、２，５−ジクロロテレフタル酸クロリドなどの芳香族酸クロリドと２−クロロ−ｐ−フェリレンジアミン、４，４’−ジアミノジフェニルエ−テルなどの芳香族ジアミンとの反応で得られる。
【００１３】
この発明において中間層を形成する接着剤層は、耐熱性の熱可塑性接着剤、熱硬化性接着剤、好適には熱硬化性接着剤からなり、好適には積層した接着剤層の乾燥状態での厚みが２−１００μｍ、幅が３−５０ｍｍである。
また、この接着剤層は接着剤付きのテ−プ状フィルムとして設けてもよくあるいはテ−プ状フィルムを巻きつけた後、接着剤を塗布あるいは接着剤シ−トを張り合わせて接着剤付きテ−プを設けてもよい。
【００１４】
前記熱硬化性接着剤としては、エポキシ樹脂、ＮＢＲ−フェノ−ル系樹脂、フェノ−ル−ブチラ−ル系樹脂、エポキシ−ＮＢＲ系樹脂、エポキシ−フェノ−ル系樹脂、エポキシ−ナイロン系樹脂、エポキシ−ポリエステル系樹脂、エポキシ−アクリル系樹脂、アクリル系樹脂、ポリアミド−エポキシ−フェノ−ル系樹脂、ポリイミド系樹脂、ポリイミドシロキサン−エポキシ樹脂などが挙げられる。
前記熱可塑性接着剤としては、ポリアミド系樹脂、ポリエステル系樹脂、ポリイミド系樹脂、ポリイミドシロキサン系樹脂などが挙げられる。
前記の接着剤は、テ−プ状耐熱性樹脂フィルムＡの片面とテ−プ状耐熱性樹脂フィルムＢの片面とのそれぞれに設けることが好ましい。
【００１５】
この発明における外側層を形成する耐熱性樹脂フィルムＢとしては、ガラス転移温度あるいは融点が１８０℃以上である芳香族ポリイミド、芳香族ポリアミド、芳香族ポリエステル、フッ素樹脂または芳香族ポリアミドイミドからなり、好適には厚みが２５−２００μｍ、幅が３−５０ｍｍのテ−プ状フィルムが使用される。特に、５０−２５０℃での線膨張係数（ＣＴＥ）が６０×１０-5ｃｍ／ｃｍ／℃（ｐｐｍで表示することもある）以下、特に３−５０×１０-5ｃｍ／ｃｍ／℃であって、引張弾性率が２００−１４００ｋｇ／ｍｍ2 である芳香族ポリイミドフィルムあるいは芳香族ポリアミドフィルムが好適に使用される。そのなかでも、吸水率が４％以下、特に３％以下である芳香族ポリイミドフィルムが好適に使用される。
【００１６】
前記の芳香族ポリイミドフィルムは、例えば以下のようにして製造することができる。先ず前記芳香族テトラカルボン酸二無水物と芳香族ジアミンとをＮ，Ｎ−ジメチルアセトアミドやＮ−メチル−２−ピロリドンなどの有機極性溶媒中で重合して、ポリマ−の対数粘度（測定温度：３０℃、濃度：０．５ｇ／１００ｍｌ溶媒、溶媒：Ｎ−メチル−２−ピロリドン）が１〜５ 、ポリマ−濃度が１５〜２５重量％であり、回転粘度（３０℃）が５００〜４５００ポイズであるポリアミック酸（イミド化率：５％以下）溶液を得る。
次いで、好適にはこのポリアミック酸１００重量部に対して０．０１〜１重量％のリン化合物、例えば（ポリ）リン酸エステルおよび／またはリン酸エステルのアミン塩などの有機系リン化合物あるいは無機リン化合物および、好適にはさらにポリアミック酸１００重量部に対して０．０２〜６重量部のコロイダルシリカ、窒化珪素、タルク、、酸化チタン、燐酸カルシウムなどの無機フィラ−（好適には平均粒径０．００５〜５μｍ、特に０．００５〜２μｍ）を添加してポリアミック酸溶液組成物を調製する。
このポリアミック酸溶液組成物をそのままあるいは化学イミド化剤を加えて、平滑な表面を有する支持体表面に流延、乾燥して、固化フィルムを支持体表面から剥離する。
次いで、固化フィルムの片面または両面にアミノシラン系、エポキシシラン系あるいはチタネ−ト系の表面処理剤を含有する表面処理液を塗布した後、さらに乾燥することもできる。
前記のようにして得られた固化フィルムを、必要であれば両方向に延伸した後乾燥フィルムの幅方向の両端縁を把持した状態で、最高加熱温度：３５０〜５００℃の範囲内の温度で加熱して乾燥およびイミド化して芳香族ポリイミドフィルムとして好適に製造することができる。
上記のようにして得られた芳香族ポリイミドフィルムを、好適には低張力下あるいは無張力下に２００〜４００℃程度の温度で加熱して応力緩和処理し、巻き取る。
この芳香族ポリイミドフィルムは、そのままあるいはコロナ放電処理、プラズマ処理、紫外線照射、グロ−放電処理、火炎処理で表面処理を施した後、接着性を改良した芳香族ポリイミドフィルムとして使用することができる。
【００１７】
前記の芳香族ポリアミドフィルムは、例えば以下のようにして製造することができる。芳香族酸クロリドと芳香族ジアミンとを有機極性溶媒中で溶液重合、あるいは水系媒体を使用する界面重合などで合成される。ポリマ−溶液は単量体として酸クロリドとジアミンとを使用すると塩化水素が副生するためこれを中和するために水酸化カルシウムなどの無機の中和剤、またはエチレンオキサイドなどの有機の中和剤を添加する。
また、イソシアネ−トとカルボン酸との反応は非プロトン性有機極性溶媒中、触媒の存在下で行われる。
これらのポリマ−溶液はそのままフィルムを形成する製膜原液にしてもよく、またポリマ−を一度単離してから上記の溶媒に再溶解して製膜原液を調製してもよい。製膜原液には溶解助剤として無機塩例えば塩化カルシウム、塩化マグネシウムなどを添加してもよい。製膜原液中のポリマ−濃度は２−３５重量％が好ましい。
【００１８】
この発明の形状保持性のスパイラル管状物は、例えば、被保護体と同一外形状を有する（形状は、断面円形または角形等任意の形状を有してよい。）長尺の形状付与部材、例えば耐熱性の棒またはパイプにスパイラル状に巻いた内側層となるテ−プ状耐熱性樹脂フィルムＡ、好適にはテ−プ状芳香族ポリイミドフィルムＡとそれと同じ幅か少し幅の狭い外側層となるテ−プ状耐熱性樹脂フィルムＢ、好適にはテ−プ状芳香族ポリイミドフィルムＢとその間に接着剤を配置し、熱硬化性接着剤の場合には溶媒を乾燥してＢステ−ジの段階で、熱可塑性接着剤の場合には積層体に圧力を加えてガラス転移温度あるいは融点以上の温度に加熱することによって、フィルムの内側層と外側層とを重ねたまま、熱硬化性接着剤の場合には硬化温度以上の温度に加熱して、あるいは熱可塑性接着剤の場合には冷却して、接着剤を硬化して積層一体化させた後、スパイラル状の積層体を長尺の形状付与部材から外して得られる。
【００１９】
上記の方法は、好適には、例えば次のようにして実施できる。先ず、前記の内側層となる耐熱性樹脂フィルムＡおよび耐熱性樹脂フィルムＢの片面に接着剤を塗布し、接着剤の乾燥厚みが２−１００μｍであるフィルムを得る。このフィルムを３−５０ｍｍにスリットし、熱硬化性接着剤付きのテ−プ状耐熱性樹脂フィルムを製造する。このテ−プ状フィルムＡを接着剤面を外側にして直径が５−５０ｍｍの円状の棒またはパイプにスパイラル状に巻きつけ、両端を固定する。次いでその上に接着剤同士が重なるように、外側層となる熱硬化性接着剤付きテ−プ状耐熱性樹脂フィルムＢを巻き付け、テ−プ状耐熱性樹脂フィルムＡ／熱硬化性接着剤／テ−プ状耐熱性樹脂製フィルムＢの構成にして、必要であれば周囲をテ−プ状のものあるいは線状のもので加圧・固定して、１５０−４００℃の範囲内の温度に加熱して接着剤を硬化して積層一体化し、冷却した後、形成された積層体を棒またはパイプから外し、スパイラル管状物を得ることができる。
【００２０】
この発明のスパイラル管状物はそのままで被保護体に適用してもよく、あるいは適当な長さに切断して使用してもよく、さらに最外層に保温の目的で耐熱性発砲シ−ト、耐熱性多孔シ−トで覆って使用してもよい。
また、形状が複雑な被保護体の場合には、スパイラル管状物と平面状テ−プとを組み合わせて使用して被保護体を覆ってもよい。
【００２１】
【実施例】
以下にこの発明の実施例を示す。
以下の各例において、ポリイミドフィルムの物性測定は以下の方法によって行った。
吸水率：ＡＳＴＭ Ｄ５７０−６３に従って測定（２３℃×２４時間）
引張弾性率：ＡＳＴＭ Ｄ８８２−６４Ｔに従って測定（ＭＤ）
線膨張係数（５０−２５０℃または５０−３００℃）：３００℃で３０分加熱して応力緩和したサンプルをＴＭＡ装置（引張りモ−ド、２ｇ荷重、試料長１０ｍｍ、２０℃／分）で測定
【００２２】
参考例１
内容積１００リットルの重合槽に、Ｎ，Ｎ−ジメチルアセトアミド５４．６ｋｇを加え、次いで，３，３’，４，４’−ビフェニルテトラカルボン酸二無水物８．８２６ｋｇとパラフェニレンジアミン３．２４３ｋｇとを加え、３０℃で１０時間重合反応させてポリマ−の対数粘度（測定温度：３０℃、濃度：０．５ｇ／１００ミリリットル溶媒、溶媒：Ｎ，Ｎ−ジメチルアセトアミド）が１．６０、ポリマ−濃度が１８重量％であるポリアミック酸（イミド化率：５％以下）溶液を得た。
このポリアミック酸溶液に、ポリアミック酸１００重量部に対して０．１重量部の割合でモノステアリルリン酸エステルトリエタノ−ルアミン塩および０．５重量部の割合（固形分基準）で平均粒径０．０８μｍのコロイダルシリカを添加して均一に混合してポリアミック酸溶液組成物を得た。
このポリアミック酸溶液組成物の回転粘度は３０００ポイズであった。このポリアミック酸溶液組成物をＴダイ金型のリップから連続的に、キャスティング・乾燥炉の平滑な支持体に押出して前記溶液の薄膜を形成し、１３０℃で１０分間乾燥し、支持体から剥がし、幅方向を把持した状態でキュア−炉内でキュア−（２００℃から４５０℃、約２０分間）して、厚み７５μｍの芳香族ポリイミドフィルムを得た。このフィルムは、弾性率が７５０ｋｇ／ｍｍ2 、線膨張係数（５０−３００℃）が１６ｐｐｍ、吸水率が１．５％であった。
【００２３】
参考例２
パラフェニレンジアミンの代わりに、４，４’−ジアミノジフェニルエ−テル６．００７ｋｇにし、Ｎ，Ｎ−ジメチルアセトアミド６７．６ｋｇにした他は、参考例１と同様にして厚み７５μｍの芳香族ポリイミドフィルムを得た。
このフィルムは、弾性率が３７０ｋｇ／ｍｍ2 、線膨張係数（５０℃から２５０℃）が４０ｐｐｍ、吸水率が２．５％であった。
【００２４】
参考例３
Ｔダイ金型のリップを変えた他は参考例１と同様にして、厚み１２５μｍの芳香族ポリイミドフィルムを得た。
このフィルムは、弾性率が６９０ｋｇ／ｍｍ2 、線膨張係数（５０−３００℃）が１８ｐｐｍ、吸水率が１．６％であった。
【００２５】
実施例１
参考例１で製造した７５μｍの芳香族ポリイミドフィルムにポリイミドシロキサン系の熱硬化性接着剤〔ポリイミドシロキサン、エポキシ樹脂、フェノ−ル樹脂および硬化触媒からなる〕のテトラヒドロフラン溶液（固形分濃度：２５重量％）を乾燥後の厚みが３０μｍになるように塗布し、１００℃で乾燥して接着剤付きポリイミドフィルムを得た。このフィルムを１０ｍｍ幅および９ｍｍ幅にスリットして２種類の接着剤付きテ−プを作製した。１０ｍｍ幅のテ−プを接着剤層を外側にして外径１０ｍｍのステンレスの丸棒にスパイラル状に巻きつけた後、両端を固定し、さらにその上に、９ｍｍ幅のテ−プをスパイラル状に巻きつけ、両端を固定した。この積層体に圧力を特に加えることなくオ−ブン中で１００℃で１時間、２００℃で１時間、２５０℃で１時間加熱して硬化させた後、放冷して積層体であるスパイラル状物をステンレスの、丸棒から外し、長さ１００ｃｍのスパイラル管状物を得た。
このスパイラル管状物は長尺方向に２５０ｇの荷重を加えて伸びを測定したところ４８％であり、荷重をなくすともとの状態に戻り、また外径１０ｍｍの丸棒に巻きつけることが容易にできた。この際スパイラル状管状物は均等に整然と装着することができた。
また、このスパイラル管状物を２２０℃の高温槽に入れ熱処理し、熱処理前後の外径を測定した。熱処理前は１０．３ｍｍ、熱処理後では１０．４ｍｍであった。
【００２６】
実施例２
参考例１で製造した芳香族ポリイミドフィルムに代えて参考例２で製造した７５μｍの芳香族ポリイミドフィルムを使用した他は実施例１と同様にしてスパイラル管状物を得た。
このスパイラル管状物は、長尺方向に２５０ｇの荷重を加えてた後荷重をなくすともとの状態に戻り、また外径１０ｍｍの丸棒にスパイラル状に巻きつけることが容易にできた。この際スパイラル管状物は均等に整然と装着することができた。
また、このスパイラル管状物を２２０℃の高温槽に入れ熱処理し、熱処理前後の外径を測定した。熱処理前は１０．３ｍｍ、熱処理後では１０．２ｍｍであった。
【００２７】
実施例３
６ｍｍφのステンレス棒を使用し、接着剤の乾燥後の厚みを２０μｍに変え、参考例２による芳香族ポリイミドフィルムから得た６ｍｍ幅および５．５ｍｍ幅のテ−プを使用し、加熱条件を２５０℃で２時間、３２０℃で２０分に変えた他は実施例１と同様に実施して、内径６ｍｍ、長さ１００ｃｍのスパイラル管状ヒ−タ−を得た。
このスパイラル管状物は長尺方向に２５０ｇの荷重を加えた後、荷重をなくすともとの状態に戻り、また外径６ｍｍの丸棒にスパイラル状に巻きつけることが容易にできた。この際スパイラル管状物は均等に整然と装着することができた。また、６ｍｍφの１５Ｒで直角に曲げたパイプに同様にスパイラル状に巻きつけたところ均等に整然と装着することができた。
また、このスパイラル管状ヒ−タ−を２８０℃の高温槽に入れ、熱処理前後の外径を測定した。熱処理前は６．３ｍｍ、熱処理後では６．２ｍｍであった。
【００２８】
実施例４
内側層に参考例２による芳香族ポリイミドフィルムから得た幅１０ｍｍのテ−プを使用し、外側層に参考例１による芳香族ポリイミドフィルムから得た幅９ｍｍのテ−プを使用した他は実施例３と同様に実施して、内径６ｍｍ、長さ１００ｃｍのスパイラル管状物を得た。
このスパイラル管状物は長尺方向に２５０ｇの荷重を加えた後、荷重をなくすともとの状態に戻り、また外径６ｍｍの丸棒にスパイラル状に巻きつけることが容易にできた。この際スパイラル管状物は均等に整然と装着することができた。
また、このスパイラル管状物を２２０℃の高温槽に入れ熱処理し、熱処理前後の外径を測定した。熱処理前は５．９ｍｍ、熱処理後では６．１ｍｍであった。
【００２９】
実施例５
８ｍｍφのステンレス棒を使用し、接着剤の乾燥後の厚みを３０μｍに変え、参考例３による芳香族ポリイミドフィルムから得た幅１０ｍｍのシ−トを使用し、加熱条件を２５０℃で２時間、３２０℃で３０分に変えた他は実施例１と同様に実施して、内径８ｍｍ、長さ１００ｃｍのスパイラル管状物を得た。
このスパイラル管状物は長尺方向に２５０ｇの荷重を加えて伸びを測定したところ２７％であり、荷重をなくすともとの状態に戻り、また外径８ｍｍの丸棒にスパイラル状に巻きつけることが容易にできた。この際スパイラル管状物は均等に整然と装着することができた。
また、このスパイラル管状物を２２０℃の高温槽に入れ熱処理し、熱処理前後の外径を測定した。熱処理前は８．３ｍｍ、熱処理後では８．４ｍｍであった。
【００３０】
実施例６
内側層に参考例３による芳香族ポリイミドフィルムから得た幅１０ｍｍのテ−プを使用し、外側層に参考例１による芳香族ポリイミドフィルムから得た幅９ｍｍのテ−プを使用した他は実施例５と同様に実施して、内径１０ｍｍ、長さ１００ｃｍのスパイラル管状物を得た。
このスパイラル管状物は長尺方向に２５０ｇの荷重を加えて伸びを測定したところ４０％であり、荷重をなくすともとの状態に戻り、また外径８ｍｍの丸棒にスパイラル状に巻きつけることが容易にできた。この際スパイラル管状物は均等に整然と装着することができた。
また、このスパイラル管状物を２２０℃の高温槽に入れ熱処理し、熱処理前後の外径を測定した。熱処理前は１０．３ｍｍ、熱処理後では１０．４ｍｍであった。
【００３１】
実施例７
接着剤付きの１０ｍｍ幅のテ−プを外径１０ｍｍのステンレスの丸棒にスパイラル状に巻きつけた後、両端を固定し、その上に参考例１で製造した７５μｍの芳香族ポリイミドフィルムを９．８ｍｍ幅にスリットしたテ−プをスパイラル状に巻きつけた他は、実施例１と同様に実施してスパイラル状管状物を得た。
このスパイラル管状物は長尺方向に２５０ｇの荷重を加えた後荷重をなくすともとの状態に戻り、また外径１０ｍｍの丸棒にスパイラル状に巻きつけることが容易にできた。この際スパイラル管状物は均等に整然と装着することができた。
また、このスパイラル管状物を２２０℃の高温槽に入れ、熱処理し、熱処理前後の外径を測定した。熱処理前は１０．２ｍｍ、熱処理後では１０．３ｍｍであった。
【００３２】
【発明の効果】
この発明は以上説明したように構成されているので、以下に記載のような効果を奏する。
この発明のスパイラル管状物は形状保持性を有し、パイプとの密着性が良い。
また、被装着体に容易にしかも均等に整然と装着することができる。
【００３３】
この発明の製造方法によれば、任意の内径を有し、形状保持性および耐熱性の良好なスパイラル管状物を得ることができる。
【図面の簡単な説明】
【図１】図１は、スパイラル管状物の一例をスパイラル芯に平行に切断した一部断面図である。
【図２】図２は、この発明のスパイラル管状物の一例を示す斜視図である。
【図３】図３は、この発明のスパイラル管状物の一例の使用例を示す一部斜視図である。
１ スパイラル管状物
２ 内側層を形成するテ−プ状耐熱性樹脂フィルムＡ
３ 中間層を形成する接着剤層
４ 外側層を形成するテ−プ状耐熱性樹脂フィルムＢ
１０ 被装着体[0001]
BACKGROUND OF THE INVENTION
The present invention is suitable for applications such as a heater having good adhesion to a pipe and good thermal efficiency, and can be used for heat insulation, protection, insulation, etc. of pipes such as semiconductor manufacturing equipment and analytical instruments. The present invention relates to a shape-retaining spiral tubular product.
The present invention also provides a tape-shaped heat-resistant resin film as an inner layer wound in a spiral shape, a tape-shaped heat-resistant resin film as an outer layer, and an adhesive therebetween, and the adhesive is cured. It is related with the manufacturing method of the spiral tubular thing laminated | stacked and integrated.
[0002]
[Prior art]
Conventionally, in order to protect pipes and electric wires, it is generally performed to wrap an insulating adhesive tape.
[0003]
[Problems to be solved by the invention]
However, when the above-described pipe or electric wire is provided in a narrow space between the devices, it is difficult to wrap with tape. Furthermore, when heat resistance is required, protection cannot be performed with a general insulating adhesive tape.
An object of the present invention is to provide a spiral tubular article that can be easily attached to an object to be protected, has good adhesion, and has good shape retention, and a method for producing the same.
[0004]
[Means for Solving the Problems]
The present invention has a configuration of a tape-shaped heat-resistant resin film A that forms an inner layer of a spiral object, an adhesive layer that forms an intermediate layer, and a tape-shaped heat-resistant resin film B that forms an outer layer. The present invention relates to a shape-retaining spiral tubular product. Further, the present invention is made of a tape-shaped heat-resistant resin film A to be an inner layer and a tape-shaped heat-resistant resin to be an outer layer wound around a long shape-imparting member having the same outer shape as the object to be protected. The present invention relates to the above-described method for producing a spiral tubular product, characterized in that an adhesive is disposed between the film B and the adhesive is cured and laminated and integrated with the inner and outer layers of the film being stacked.
The shape retaining property means that when a load of 250 g is applied in the longitudinal direction, the shape is retained, and the state is restored to the original state without the load.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention are listed below.
1) The spiral tubular product described above, wherein the tape-shaped heat-resistant resin film A forming the inner layer side of the spiral-shaped material and the tape-shaped heat-resistant resin film B forming the outer layer have a thickness of 25 to 200 μm, respectively.
2) The spiral tubular article as described above, wherein the adhesive layer is a thermosetting adhesive or a thermoplastic adhesive.
3) The spiral tubular article as described above, wherein the tape-shaped heat-resistant resin film A and the tape-shaped heat-resistant resin film B are tape-shaped aromatic polyimide films.
[0006]
Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 is a partial cross-sectional view of an example of a spiral tubular product cut in parallel to a spiral core.
FIG. 2 is a perspective view showing an example of the spiral tubular article of the present invention.
FIG. 3 is a partial perspective view showing an example of use of an example of the spiral tubular article of the present invention.
[0007]
In FIG. 1, a shape-retaining spiral
[0008]
In FIG. 2, a shape-retaining spiral tubular heater-1 is a tape-shaped heat-resistant resin film A that forms an inner layer of a spiral object 2, an
[0009]
In FIG. 3, the shape-retaining spiral tubular object is expanded and inserted between the spiral tubular objects until 10, which is also referred to as the object, can be inserted. While maintaining the state, the spiral
[0010]
The spiral tubular article of the present invention is made of, for example, a tape-like heat-resistant resin film A with an adhesive serving as an inner layer and made of metal, for example, a heat-resistant rod or pipe made of stainless steel or the like. Wrap in a spiral shape around the shape-giving member, wind the tape-shaped heat-resistant resin film B with adhesive on the outer layer on top of the spiral, with the adhesive inside, and cure the adhesive Thus, the formed laminate can be removed from a long shape-giving member such as a rod or a pipe, and can be obtained as a molded product having a spiral shape. The adhesive may be provided on both the tape-like heat resistant resin A and the tape-like heat resistant resin B, or may be provided on only one of them. The spiral tubular article of the present invention is almost uniform in shape and shape, such as the outer diameter of the spiral article, even in an environment heated to a high temperature of about 200 ° C., and even after being mounted on the mounted body. The shape is maintained without any change.
[0011]
The tape-like heat-resistant resin film A forming the inner layer of the spiral object in this invention is made of an aromatic polyimide or an aromatic polyamide having a glass transition temperature or a melting point of 180 ° C. or more, and preferably has a thickness. A tape-like film having a width of 25 to 200 μm and a width of 3 to 50 mm is used. In particular, the coefficient of linear expansion (CTE) at 50-300 ° C. is 60 × 10 −5 cm / cm / ° C. or less (sometimes expressed in ppm), among which 3-50 × 10 −5 cm / cm / An aromatic polyimide film or an aromatic polyamide film having a tensile elastic modulus of 200-1400 kg / mm 2 at a temperature of ° C is preferably used. Among them, an aromatic polyimide film having a water absorption rate of 4% or less, particularly 3% or less is preferably used.
[0012]
Examples of the aromatic polyimide include 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride, pyromellitic dianhydride, and 3,3 ′, 4,4′-benzophenonetetracarboxylic dianhydride. It is obtained by polymerizing and imidizing an aromatic tetracarboxylic dianhydride such as p-phenylenediamine and 4,4′-diaminodiphenyl ether. In particular, what is obtained by using 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride as an aromatic polyimide in an amount of 15 mol% or more in the aromatic tetracarboxylic acid component is heat resistance, low linear expansion coefficient, It is preferable because of its low water absorption.
Examples of the aromatic polyamide include aromatic acid chlorides such as 2-chloroterephthalic acid chloride and 2,5-dichloroterephthalic acid chloride, 2-chloro-p-ferylenediamine, and 4,4′-diaminodiphenyl ether. Obtained by reaction with an aromatic diamine.
[0013]
In this invention, the adhesive layer forming the intermediate layer is composed of a heat-resistant thermoplastic adhesive, a thermosetting adhesive, preferably a thermosetting adhesive, and preferably in a dry state of the laminated adhesive layers. Has a thickness of 2-100 μm and a width of 3-50 mm.
The adhesive layer may be provided as a tape-like film with an adhesive, or after the tape-like film is wound, the adhesive is applied or the adhesive sheet is laminated and the adhesive-attached tape is attached. -You may provide a loop.
[0014]
Examples of the thermosetting adhesive include epoxy resin, NBR-phenolic resin, phenol-butyral resin, epoxy-NBR resin, epoxy-phenolic resin, epoxy-nylon resin, Examples include epoxy-polyester resins, epoxy-acrylic resins, acrylic resins, polyamide-epoxy-phenol resins, polyimide resins, polyimide siloxane-epoxy resins, and the like.
Examples of the thermoplastic adhesive include polyamide resins, polyester resins, polyimide resins, polyimide siloxane resins, and the like.
The adhesive is preferably provided on each of one side of the tape-like heat-resistant resin film A and one side of the tape-like heat-resistant resin film B.
[0015]
The heat-resistant resin film B forming the outer layer in the present invention is preferably composed of an aromatic polyimide, aromatic polyamide, aromatic polyester, fluororesin or aromatic polyamideimide having a glass transition temperature or melting point of 180 ° C. or higher. A tape-shaped film having a thickness of 25 to 200 μm and a width of 3 to 50 mm is used. In particular, the linear expansion coefficient (CTE) at 50-250 ° C. is 60 × 10 −5 cm / cm / ° C. (may be expressed in ppm) or less, particularly 3-50 × 10 −5 cm / cm / ° C. An aromatic polyimide film or an aromatic polyamide film having a tensile elastic modulus of 200-1400 kg / mm 2 is preferably used. Among them, an aromatic polyimide film having a water absorption rate of 4% or less, particularly 3% or less is preferably used.
[0016]
The aromatic polyimide film can be produced, for example, as follows. First, the aromatic tetracarboxylic dianhydride and the aromatic diamine are polymerized in an organic polar solvent such as N, N-dimethylacetamide or N-methyl-2-pyrrolidone, and the logarithmic viscosity of the polymer (measurement temperature: 30 ° C., concentration: 0.5 g / 100 ml solvent, solvent: N-methyl-2-pyrrolidone) is 1 to 5, polymer concentration is 15 to 25% by weight, and rotational viscosity (30 ° C.) is 500 to 4500 poise. A polyamic acid solution (imidation rate: 5% or less) is obtained.
Subsequently, 0.01 to 1% by weight of a phosphorus compound, preferably an organic phosphorus compound such as (poly) phosphate ester and / or an amine salt of phosphate ester, or inorganic phosphorus, based on 100 parts by weight of this polyamic acid. Compounds and preferably inorganic fillers such as colloidal silica, silicon nitride, talc, titanium oxide, calcium phosphate (preferably having an average particle size of 0 with respect to 100 parts by weight of polyamic acid) 0.005 to 5 μm, especially 0.005 to 2 μm) is added to prepare a polyamic acid solution composition.
The polyamic acid solution composition is added as it is or a chemical imidizing agent is added to the surface of the support having a smooth surface and dried to peel the solidified film from the surface of the support.
Next, after applying a surface treatment liquid containing an aminosilane-based, epoxysilane-based or titanate-based surface treatment agent to one or both sides of the solidified film, it can be further dried.
If necessary, the solidified film obtained as described above is stretched in both directions and then heated at a temperature within the range of 350 to 500 ° C. while holding both edges in the width direction of the dried film. Then, it can be suitably produced as an aromatic polyimide film by drying and imidization.
The aromatic polyimide film obtained as described above is preferably heated at a temperature of about 200 to 400 ° C. under low tension or no tension, and is subjected to stress relaxation treatment and wound.
This aromatic polyimide film can be used as an aromatic polyimide film with improved adhesiveness, as it is or after being subjected to surface treatment by corona discharge treatment, plasma treatment, ultraviolet irradiation, glow discharge treatment or flame treatment.
[0017]
The aromatic polyamide film can be manufactured, for example, as follows. An aromatic acid chloride and an aromatic diamine are synthesized by solution polymerization in an organic polar solvent or by interfacial polymerization using an aqueous medium. Polymer solutions use acid chloride and diamine as monomers, and hydrogen chloride is by-produced. In order to neutralize this, inorganic neutralizers such as calcium hydroxide, or organic neutralization such as ethylene oxide Add agent.
The reaction between isocyanate and carboxylic acid is carried out in an aprotic organic polar solvent in the presence of a catalyst.
These polymer solutions may be used as a film-forming stock solution for forming a film as it is, or the polymer may be isolated once and then redissolved in the above solvent to prepare a film-forming stock solution. An inorganic salt such as calcium chloride or magnesium chloride may be added as a dissolution aid to the film-forming stock solution. The polymer concentration in the stock solution is preferably 2 to 35% by weight.
[0018]
The shape-retaining spiral tubular article of the present invention has, for example, the same outer shape as the object to be protected (the shape may have an arbitrary shape such as a circular cross section or a square shape), for example, a long shape imparting member, for example Tape-shaped heat-resistant resin film A which is an inner layer wound spirally around a heat-resistant rod or pipe, preferably tape-shaped aromatic polyimide film A and an outer layer having the same width or slightly narrower width A tape-like heat-resistant resin film B, preferably a tape-like aromatic polyimide film B, and an adhesive between them, and in the case of a thermosetting adhesive, the solvent is dried and the B stage In the case of a thermoplastic adhesive, in the case of a thermoplastic adhesive, by applying pressure to the laminate and heating it to a temperature above the glass transition temperature or the melting point, the thermosetting adhesion is performed with the inner and outer layers of the film being stacked. In the case of an agent, the curing temperature is exceeded And heating each time, or in the case of thermoplastic adhesive is cooled, after integrally laminated by curing the adhesive, obtained by removing the spiral laminate from the shaping member elongated.
[0019]
The above method can be preferably carried out, for example, as follows. First, an adhesive is applied to one side of the heat-resistant resin film A and the heat-resistant resin film B to be the inner layer, and a film having a dry thickness of 2 to 100 μm is obtained. This film is slit to 3-50 mm to produce a tape-like heat-resistant resin film with a thermosetting adhesive. This tape-shaped film A is wound spirally around a circular bar or pipe having a diameter of 5-50 mm with the adhesive surface facing outward, and both ends are fixed. Next, a tape-like heat-resistant resin film B with a thermosetting adhesive serving as an outer layer is wrapped around the adhesive so that the adhesives overlap with each other, and the tape-like heat-resistant resin film A / thermosetting adhesive / The tape-shaped heat-resistant resin film B is formed, and if necessary, the periphery is pressed and fixed with a tape-shaped or linear film to a temperature within the range of 150-400 ° C. After heating to cure the adhesive to laminate and integrate, and cooling, the formed laminate can be removed from the rod or pipe to obtain a spiral tubular product.
[0020]
The spiral tubular article of the present invention may be applied to the object to be protected as it is, or may be used after being cut to an appropriate length. Further, the outermost layer is provided with a heat-resistant foam sheet, It may be used by covering with a porous porous sheet.
In the case of a protected object having a complicated shape, the object to be protected may be covered using a combination of a spiral tubular object and a flat tape.
[0021]
【Example】
Examples of the present invention will be described below.
In each of the following examples, the physical properties of the polyimide film were measured by the following method.
Water absorption: measured according to ASTM D570-63 (23 ° C. × 24 hours)
Tensile modulus: measured according to ASTM D882-64T (MD)
Linear expansion coefficient (50-250 ° C. or 50-300 ° C.): A sample relaxed by heating at 300 ° C. for 30 minutes was measured with a TMA apparatus (tensile mode, 2 g load, sample length 10 mm, 20 ° C./min). [0022]
Reference example 1
To a polymerization tank having an internal volume of 100 liters, 54.6 kg of N, N-dimethylacetamide was added, and then 8.826 kg of 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride and 3.243 kg of paraphenylenediamine. And a polymerization reaction at 30 ° C. for 10 hours to obtain a polymer having a logarithmic viscosity (measurement temperature: 30 ° C., concentration: 0.5 g / 100 ml solvent, solvent: N, N-dimethylacetamide) of 1.60, polymer -A polyamic acid (imidation rate: 5% or less) solution having a concentration of 18% by weight was obtained.
In this polyamic acid solution, an average particle diameter of 0 in terms of 0.1 parts by weight of monostearyl phosphate ester triethanolamine salt and 0.5 parts by weight (based on solid content) with respect to 100 parts by weight of polyamic acid. 0.08 μm colloidal silica was added and mixed uniformly to obtain a polyamic acid solution composition.
The rotational viscosity of this polyamic acid solution composition was 3000 poise. This polyamic acid solution composition is continuously extruded from the lip of a T-die mold onto a smooth support of a casting / drying furnace to form a thin film of the solution, dried at 130 ° C. for 10 minutes, and peeled off from the support Then, in a state where the width direction was held, the film was cured in a curing furnace (from 200 ° C. to 450 ° C. for about 20 minutes) to obtain an aromatic polyimide film having a thickness of 75 μm. This film had an elastic modulus of 750 kg / mm 2 , a linear expansion coefficient (50-300 ° C.) of 16 ppm, and a water absorption of 1.5%.
[0023]
Reference example 2
An aromatic polyimide film having a thickness of 75 μm as in Reference Example 1 except that 4,4′-diaminodiphenyl ether is 6.007 kg and N, N-dimethylacetamide is 67.6 kg instead of paraphenylenediamine. Got.
This film had an elastic modulus of 370 kg / mm 2 , a linear expansion coefficient (50 ° C. to 250 ° C.) of 40 ppm, and a water absorption of 2.5%.
[0024]
Reference example 3
An aromatic polyimide film having a thickness of 125 μm was obtained in the same manner as in Reference Example 1 except that the lip of the T-die mold was changed.
This film had an elastic modulus of 690 kg / mm 2 , a linear expansion coefficient (50-300 ° C.) of 18 ppm, and a water absorption of 1.6%.
[0025]
Example 1
A 75 μm aromatic polyimide film produced in Reference Example 1 and a tetrahydrofuran solution (solid content concentration: 25% by weight) of a polyimidesiloxane thermosetting adhesive (comprising polyimidesiloxane, epoxy resin, phenolic resin and curing catalyst). ) Was applied so that the thickness after drying was 30 μm, and dried at 100 ° C. to obtain a polyimide film with an adhesive. This film was slit to 10 mm width and 9 mm width to produce two types of tapes with adhesive. A tape with a width of 10 mm is wound around a stainless steel round bar with an outer diameter of 10 mm with the adhesive layer on the outside, then fixed at both ends, and a tape with a width of 9 mm is further spiraled on the tape. Wrapped around and fixed at both ends. The laminate was heated and cured in an oven at 100 ° C. for 1 hour, 200 ° C. for 1 hour, and 250 ° C. for 1 hour without applying any pressure, and then allowed to cool to form a spiral. The product was removed from the round bar made of stainless steel to obtain a spiral tubular product having a length of 100 cm.
This spiral tubular product was 48% when measured by applying a load of 250 g in the longitudinal direction, and returned to its original state when the load was removed, and it could easily be wound around a round bar with an outer diameter of 10 mm. It was. At this time, the spiral tubular article could be mounted evenly and orderly.
Moreover, this spiral tubular product was put in a high-temperature bath at 220 ° C. and heat-treated, and the outer diameter before and after the heat treatment was measured. It was 10.3 mm before heat treatment and 10.4 mm after heat treatment.
[0026]
Example 2
A spiral tubular product was obtained in the same manner as in Example 1, except that the 75 μm aromatic polyimide film produced in Reference Example 2 was used instead of the aromatic polyimide film produced in Reference Example 1.
This spiral tubular product returned to its original state after applying a load of 250 g in the longitudinal direction, and could easily be wound around a round bar having an outer diameter of 10 mm in a spiral shape. At this time, the spiral tubular article could be mounted evenly and orderly.
Moreover, this spiral tubular product was put in a high-temperature bath at 220 ° C. and heat-treated, and the outer diameter before and after the heat treatment was measured. It was 10.3 mm before heat treatment and 10.2 mm after heat treatment.
[0027]
Example 3
Using a 6 mmφ stainless steel rod, changing the thickness of the adhesive after drying to 20 μm, using 6 mm width and 5.5 mm width tapes obtained from the aromatic polyimide film according to Reference Example 2, and heating conditions of 250 A spiral tubular heater having an inner diameter of 6 mm and a length of 100 cm was obtained in the same manner as in Example 1 except that the temperature was changed to 2 ° C. for 2 hours and 320 ° C. for 20 minutes.
This spiral tubular product was returned to its original state after applying a load of 250 g in the longitudinal direction, and could be easily wound in a spiral shape on a round bar having an outer diameter of 6 mm. At this time, the spiral tubular article could be mounted evenly and orderly. Moreover, when it was similarly spirally wound around a pipe bent at a right angle by 15 mm of 6 mmφ, it was possible to mount it uniformly and orderly.
The spiral tubular heater was placed in a high temperature bath at 280 ° C., and the outer diameter before and after the heat treatment was measured. It was 6.3 mm before the heat treatment and 6.2 mm after the heat treatment.
[0028]
Example 4
Implementation was performed except that the tape having a width of 10 mm obtained from the aromatic polyimide film according to Reference Example 2 was used for the inner layer and the tape having a width of 9 mm obtained from the aromatic polyimide film according to Reference Example 1 was used for the outer layer. In the same manner as in Example 3, a spiral tubular product having an inner diameter of 6 mm and a length of 100 cm was obtained.
This spiral tubular product was returned to its original state after applying a load of 250 g in the longitudinal direction, and could be easily wound in a spiral shape on a round bar having an outer diameter of 6 mm. At this time, the spiral tubular article could be mounted evenly and orderly.
Moreover, this spiral tubular product was put in a high-temperature bath at 220 ° C. and heat-treated, and the outer diameter before and after the heat treatment was measured. It was 5.9 mm before the heat treatment and 6.1 mm after the heat treatment.
[0029]
Example 5
Using an 8 mmφ stainless steel rod, changing the thickness of the adhesive after drying to 30 μm, using a sheet of 10 mm width obtained from the aromatic polyimide film according to Reference Example 3, and heating conditions at 250 ° C. for 2 hours. The procedure was the same as in Example 1 except that the temperature was changed to 320 ° C. for 30 minutes to obtain a spiral tubular product having an inner diameter of 8 mm and a length of 100 cm.
This spiral tubular product was 27% when measured by applying a load of 250 g in the longitudinal direction, and returned to its original state when the load was removed, and it could be spirally wound around a round bar with an outer diameter of 8 mm. It was easy. At this time, the spiral tubular article could be mounted evenly and orderly.
Moreover, this spiral tubular product was put in a high-temperature bath at 220 ° C. and heat-treated, and the outer diameter before and after the heat treatment was measured. It was 8.3 mm before the heat treatment and 8.4 mm after the heat treatment.
[0030]
Example 6
Implementation was performed except that the tape having a width of 10 mm obtained from the aromatic polyimide film according to Reference Example 3 was used for the inner layer and the tape having a width of 9 mm obtained from the aromatic polyimide film according to Reference Example 1 was used for the outer layer. In the same manner as in Example 5, a spiral tubular product having an inner diameter of 10 mm and a length of 100 cm was obtained.
This spiral tubular product is 40% when the elongation is measured by applying a load of 250 g in the longitudinal direction, and it returns to its original state when the load is removed, and it can be spirally wound around a round bar having an outer diameter of 8 mm. It was easy. At this time, the spiral tubular article could be mounted evenly and orderly.
Moreover, this spiral tubular product was put in a high-temperature bath at 220 ° C. and heat-treated, and the outer diameter before and after the heat treatment was measured. It was 10.3 mm before heat treatment and 10.4 mm after heat treatment.
[0031]
Example 7
A tape with a width of 10 mm with an adhesive was wound around a stainless steel round bar with an outer diameter of 10 mm in a spiral shape, both ends were fixed, and the 75 μm aromatic polyimide film produced in Reference Example 1 was placed thereon. A spiral tubular product was obtained in the same manner as in Example 1 except that a tape slit to a width of 8 mm was wound in a spiral shape.
This spiral tubular product returned to its original state after applying a load of 250 g in the longitudinal direction, and was easily wound in a spiral shape on a round bar having an outer diameter of 10 mm. At this time, the spiral tubular article could be mounted evenly and orderly.
Moreover, this spiral tubular product was put in a high-temperature bath at 220 ° C., heat-treated, and the outer diameter before and after the heat treatment was measured. It was 10.2 mm before heat treatment and 10.3 mm after heat treatment.
[0032]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
The spiral tubular article of this invention has shape retention and good adhesion to the pipe.
Further, it can be easily and evenly mounted on the mounted body.
[0033]
According to the production method of the present invention, a spiral tubular product having an arbitrary inner diameter and good shape retention and heat resistance can be obtained.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view of an example of a spiral tubular article cut in parallel to a spiral core.
FIG. 2 is a perspective view showing an example of a spiral tubular article of the present invention.
FIG. 3 is a partial perspective view showing an example of use of an example of a spiral tubular article of the present invention.
DESCRIPTION OF
3 Adhesive Layer Forming
10 Attached body
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15967797A JP3757548B2 (en) | 1997-06-17 | 1997-06-17 | Spiral tubular product and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15967797A JP3757548B2 (en) | 1997-06-17 | 1997-06-17 | Spiral tubular product and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH115264A JPH115264A (en) | 1999-01-12 |
| JP3757548B2 true JP3757548B2 (en) | 2006-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15967797A Expired - Fee Related JP3757548B2 (en) | 1997-06-17 | 1997-06-17 | Spiral tubular product and method for producing the same |
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| US10233035B2 (en) | 2014-04-10 | 2019-03-19 | Flexible Steel Lacing Company | Conveyor transfer guards |
| US9663306B2 (en) | 2014-04-10 | 2017-05-30 | Flexible Steel Lacing Company | Conveyor transfer guards |
| USD789643S1 (en) | 2015-04-10 | 2017-06-13 | Flexible Steel Lacing Company | Conveyor transfer guard |
| USD780399S1 (en) | 2015-04-10 | 2017-02-28 | Flexible Steel Lacing Company | Conveyor transfer guard |
| US10427891B2 (en) | 2017-06-29 | 2019-10-01 | Flexible Steel Lacing Company | Transfer guard system and mount thereof |
| WO2022066552A1 (en) | 2020-09-22 | 2022-03-31 | Flexible Steel Lacing Company | Roller conveyor gap blocker |
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