JPH0350156B2 - - Google Patents
Info
- Publication number
- JPH0350156B2 JPH0350156B2 JP62285771A JP28577187A JPH0350156B2 JP H0350156 B2 JPH0350156 B2 JP H0350156B2 JP 62285771 A JP62285771 A JP 62285771A JP 28577187 A JP28577187 A JP 28577187A JP H0350156 B2 JPH0350156 B2 JP H0350156B2
- Authority
- JP
- Japan
- Prior art keywords
- tube
- fluororesin
- heat
- tubes
- sleeve
- 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.)
- Expired - Lifetime
Links
- 238000004519 manufacturing process Methods 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 18
- 239000004810 polytetrafluoroethylene Substances 0.000 description 18
- 229920005989 resin Polymers 0.000 description 15
- 239000011347 resin Substances 0.000 description 15
- 238000000034 method Methods 0.000 description 14
- 239000000945 filler Substances 0.000 description 7
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 7
- 238000000465 moulding Methods 0.000 description 7
- 238000007872 degassing Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920000840 ethylene tetrafluoroethylene copolymer Polymers 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229920006026 co-polymeric resin Polymers 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 238000010186 staining Methods 0.000 description 2
- PEVRKKOYEFPFMN-UHFFFAOYSA-N 1,1,2,3,3,3-hexafluoroprop-1-ene;1,1,2,2-tetrafluoroethene Chemical group FC(F)=C(F)F.FC(F)=C(F)C(F)(F)F PEVRKKOYEFPFMN-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Rigid Pipes And Flexible Pipes (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、複数本のフツ素樹脂チユーブが束
ねられてスリーブと一体化したフツ素樹脂チユー
ブ束の製造方法に係り、特に、各フツ素樹脂チユ
ーブの端末開口部のつぶれや変形の少ない製造方
法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing a fluororesin tube bundle in which a plurality of fluororesin tubes are bundled and integrated with a sleeve. The present invention relates to a manufacturing method that minimizes crushing and deformation of the end opening of a resin tube.
［従来の技術］
フツ素樹脂は、多くの高分子材料の中でも、耐
薬品性、耐熱性、非汚染性等において特に優れた
特性を示すことから、各分野で広く利用されてい
る。フツ素樹脂で形成されたチユーブは、配管材
料として他の材質からなるチユーブと同様に一本
のまま使用されことが多いが、多数本束ねてその
両端部を一体化したチユーブ束を、例えば特開昭
60−259898号などに示されるように、その耐薬品
性及び耐熱性に着目して熱交換器の伝熱管として
使用したり、あるいは、耐薬品性及び非汚染性な
どの面から脱気装置における脱気管としての使用
も検討されている（本出願人の提案による実開昭
62−27703号）。[Prior Art] Among many polymer materials, fluororesins exhibit particularly excellent properties in terms of chemical resistance, heat resistance, non-staining property, etc., and are therefore widely used in various fields. Tubes made of fluororesin are often used as a single tube as a piping material, just like tubes made of other materials. Kaisho
As shown in No. 60-259898, it is used as a heat transfer tube in a heat exchanger due to its chemical resistance and heat resistance, or it is used in a deaerator due to its chemical resistance and non-contamination property. Its use as a degassing pipe is also being considered (as proposed by the applicant).
62-27703).
ところで、これらフツ素樹脂チユーブ束は、端
末接続を容易にするため、端部にフツ素樹脂スリ
ーブを外嵌し、各チユーブとスリーブとを一体結
着させて端部を蜂の巣状の気密結合部に成形する
ものであるから、成形後における各チユーブの開
口面積のバラツキは、実際に上記装置に使用した
ときにはその性能に大きな影響を与える。即ち、
これらのバラツキは、流体をチユーブ内に流した
ときに流速の差となつてあらわれ、熱交換効率あ
るいは脱気効率の低下、バラツキの原因となるた
め、特にかかる用途にチユーブ束を使用する場合
は、チユーブ束には端部において、すべてのチユ
ーブにつぶれがあつてはならないことはいうまで
もなく、偏平化等の変形もできるだけ小さいこと
が望まれる。 By the way, in order to facilitate the terminal connection of these fluororesin tube bundles, a fluororesin sleeve is fitted around the end, and each tube and sleeve are integrally bonded to form a honeycomb-like airtight joint at the end. Therefore, variations in the opening area of each tube after molding have a large effect on the performance when actually used in the above device. That is,
These variations appear as differences in flow velocity when fluid flows into the tubes, causing a decrease in heat exchange efficiency or deaeration efficiency, and variations, so especially when using tube bundles for such applications, It goes without saying that all the tubes in the tube bundle must not be crushed at the ends, and deformation such as flattening is also desired to be as small as possible.
［発明が解決しようとする課題］
しかしながら、従来これらチユーブ束の端末成
形は、フツ素樹脂が非粘着性であることから熱融
着により行なわれており、このため加熱時におけ
るチユーブの軟化や膨脹などが原因となつてチユ
ーブがつぶれたり、あるいは、変形したりするこ
とが多く、高度な製造技術が必要であり、作業性
もあまりよくない。[Problems to be Solved by the Invention] Conventionally, however, the ends of these tube bundles have been formed by heat fusion because the fluororesin is non-adhesive. The tube is often crushed or deformed due to such factors, requiring advanced manufacturing technology and the workability is not very good.
また、フツ素樹脂の中でも機械的強度、耐熱
性、耐薬品性、非汚染性の点で特に優れる四フツ
化エチレン樹脂（以下PTFEと称す）からなるチ
ユーブを用いた場合は、PTFEが非粘着性である
ことに加え、他のフツ素樹脂に比べて溶融粘度が
著しく高く、融点以上においてもほとんど流動性
を示さないため、熱融着しにくいという性質があ
る。このため端末の一体成形を行なつたときに、
結合部に気密性不良を発生しやすいという欠点が
ある。 In addition, when using a tube made of polytetrafluoroethylene resin (hereinafter referred to as PTFE), which has particularly excellent mechanical strength, heat resistance, chemical resistance, and non-staining properties among fluororesins, PTFE is non-adhesive. In addition to being flexible, it has a significantly higher melt viscosity than other fluororesins, and exhibits almost no fluidity even above its melting point, making it difficult to heat-seal. For this reason, when integrally molding the terminal,
The disadvantage is that poor airtightness is likely to occur at the joint.
さらに、PTFEが熱融着しにくいことから、結
合部の強度を高めるために、PTFEチユーブ束の
端勝部分に外嵌するスリーブとして内径の小さめ
のものを用い、各PTFEチユーブを密着状態にし
て熱融着を行なうと、各PTFEチユーブが融点を
越えたところで大幅に膨脹し、しかもスリーブが
内側にも膨脹するので、その膨脹圧により各
PTFEチユーブ同志が圧着して結合強度は向上す
るが、その反面、特にチユーブ束の最外周に位置
するチユーブがつぶれやすくなる。したがつて、
端末開口部の一部が閉塞したり、あるいは開口部
がつぶれて流路が狭められるなどの問題点があつ
た。 Furthermore, since PTFE is difficult to heat-seal, in order to increase the strength of the joint, a sleeve with a smaller inner diameter is used to fit over the edge of the PTFE tube bundle, and each PTFE tube is kept in close contact. When heat fusion is performed, each PTFE tube expands significantly above its melting point, and the sleeve also expands inward, so the expansion pressure causes each PTFE tube to expand significantly beyond its melting point.
The PTFE tubes are crimped together and the bonding strength is improved, but on the other hand, the tubes located at the outermost periphery of the tube bundle are more likely to be crushed. Therefore,
There were problems such as a part of the terminal opening being blocked or the opening being crushed and the flow path being narrowed.
そこで、PTFEチユーブ束を製造する方法とし
て、特開昭60−259898号では、PTFEチユーブの
内部にガラスビーズ、金属粉末等のつぶれ防止の
ための耐熱材料を充填し、さらにPTFEチユーブ
の端末外周に熱流動性フツ素樹脂を設け、該熱流
動性フツ素樹脂を介して結着一体化する方法が提
案されている。ところが、この方法では、個々の
チユーブに充填剤を充填することが面倒で作業性
が悪いばかりか、加熱によりPTFEチユーブが溶
融したときに、それら充填剤がチユーブ内周面に
付着して残ることがある。かかるチユーブ束は、
脱気管のように内部に高純度な液体を通すような
用途には、汚染の原因となるので使用できないと
いう問題点がある。 Therefore, as a method for manufacturing a PTFE tube bundle, JP-A-60-259898 proposes filling the inside of the PTFE tube with a heat-resistant material such as glass beads and metal powder to prevent crushing, and then filling the outer periphery of the end of the PTFE tube with A method has been proposed in which a heat-flowable fluororesin is provided and the materials are bound and integrated via the heat-flowable fluororesin. However, with this method, not only is it troublesome to fill each tube with filler and the workability is poor, but when the PTFE tube is melted by heating, the filler remains attached to the inner circumferential surface of the tube. There is. Such a tube bundle is
There is a problem in that it cannot be used in applications such as degassing pipes in which highly pure liquid is passed through the interior because it causes contamination.
この発明は、これら従来技術の問題点に鑑み、
各チユーブの端末開口部の変形が少なく、開口状
態が良好に保持され、しかも作業性が大幅に向上
したフツ素樹脂チユーブ束の製造方法の提供をそ
の目的とする。 In view of these problems of the prior art, this invention
The purpose of the present invention is to provide a method for manufacturing a fluororesin tube bundle in which the end opening of each tube is less deformed, the opening state is maintained well, and the workability is greatly improved.
［課題を解決するための手段］
上記目的を達成するため、この発明によれば、
熱流動性フツ素樹脂からなる熱収縮チユーブをほ
ぼ密接状態で端部に外嵌したフツ素樹脂チユーブ
を複数本束ね、これらフツ素樹脂チユーブの束の
端部にフツ素樹脂スリーブをほぼ密接状態に外嵌
し、次いでこの端部を前記熱収縮チユーブの融点
以上に加熱することにより、該熱収縮チユーブを
収縮させながら溶融して、前記フツ素樹脂チユー
ブとスリーブとを接合一体化し、しかる後に該接
合部を冷却固化する工程を含むフツ素樹脂チユー
ブ束の製造方法を構成する。[Means for Solving the Problem] In order to achieve the above object, according to the present invention,
A plurality of fluororesin tubes each having a heat-shrinkable tube made of a heat-flowable fluororesin fitted onto the end thereof in a nearly intimate state are bundled together, and a fluororesin sleeve is approximately closely fitted at the end of the bundle of these fluororesin tubes. Then, by heating this end to a temperature higher than the melting point of the heat-shrinkable tube, the heat-shrinkable tube is melted while shrinking, and the fluororesin tube and sleeve are joined and integrated, and then A method for manufacturing a fluororesin tube bundle includes a step of cooling and solidifying the joint.
この構成において、フツ素樹脂チユーブとして
は、PTFEで形成されたものが各種特性の面から
好適であり、この場合接合部を形成する熱収縮チ
ユーブには、テトラフルオロエチレン−パーフル
オロアルキルビニルエーテル共重合樹脂（以下
PFAと称す）からなるものが接合強度などの面
から好適である。 In this configuration, the fluororesin tube is preferably made of PTFE from the viewpoint of various properties, and in this case, the heat-shrink tube forming the joint is made of tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer Resin (hereinafter
PFA) is preferred from the viewpoint of bonding strength.
［作用］
この発明によるフツ素樹脂チユーブ束の製造方
法において、各フツ素樹脂チユーブの端末部分に
ほぼ密接状態で外嵌される熱収縮チユーブは、加
熱による収縮して該フツ素樹脂チユーブを外側よ
り締め付け、加熱によるフツ素樹脂チユーブの膨
脹を適度に抑え、軟化したフツ素樹脂チユーブ同
志の圧迫による変形等を阻止しながら溶融する。
このため各フツ素樹脂チユーブは、熱収縮チユー
ブの溶融後においても、チユーブを拘束せずに熱
融着する従来方法に比べて膨脹率が小さく、互い
に圧迫することはほとんどない。ここで、熱収縮
チユーブは各フツ素樹脂チユーブの熱膨脹を外側
から抑える効果はあるが、その収縮力は、フツ素
樹脂チユーブの外径に大きな変化をおよぼすもの
でない。しかも、収縮後には伸ばされていた管壁
が拡張加工前の厚さに戻る（収縮前よりも肉厚が
増加する）ため、チユーブ間及び最外周に位置す
るチユーブとスリーブとの間に存在する〓間は、
収縮の前後においては実質的に変化せず、気密結
合の妨げにはならない。[Function] In the method for manufacturing a fluororesin tube bundle according to the present invention, the heat-shrinkable tube that is fitted onto the end portion of each fluororesin tube in a nearly intimate state shrinks due to heating, causing the fluororesin tube to move outward. By tightening the tube, the expansion of the fluororesin tube due to heating is moderately suppressed, and the softened fluororesin tubes are melted while preventing deformation due to pressure on each other.
Therefore, even after the heat-shrinkable tubes are melted, the fluororesin tubes have a smaller expansion rate than in the conventional method of heat-sealing the tubes without restraining them, and they hardly press against each other. Here, although the heat-shrinkable tube has the effect of suppressing the thermal expansion of each fluororesin tube from the outside, its shrinkage force does not significantly change the outer diameter of the fluororesin tube. Moreover, after contraction, the stretched tube wall returns to the thickness before the expansion process (the wall thickness increases compared to before contraction), so that the tube wall exists between the tubes and between the tube located at the outermost periphery and the sleeve. In between,
It does not substantially change before and after shrinkage, and does not interfere with airtight bonding.
そして、この溶融した熱収縮チユーブは、フツ
素樹脂スリーブの内側への膨脹圧を無理なく吸収
して内側のフツ素樹チユーブへの圧迫を阻止する
と共に、各フツ素樹チユーブの若干の膨脹圧も吸
収しながら各チユーブ間の〓間を埋める。そし
て、熱収縮チユーブを構成していた熱流動性フツ
素樹が固化することにより接合部が形成される。 This melted heat-shrinkable tube easily absorbs the expansion pressure to the inside of the fluorocarbon resin sleeve, preventing pressure on the inner fluorocarbon resin tube, and also absorbs some expansion pressure of each fluorocarbon resin tube. While doing so, fill in the gaps between each tube. Then, the heat-flowable fluorine resin forming the heat-shrinkable tube solidifies, thereby forming a joint.
したがつて、末端成形時に各フツ素樹チユーブ
が互いに圧迫することがなく、且つフツ素樹脂ス
リーブが内側のフツ素樹チユーブを圧迫すること
もないので、各フツ素樹チユーブは端部におい
て、つぶれや変形等を生ずることなく、スリーブ
と共に確実に接合一体化される。 Therefore, each fluorocarbon resin tube does not press against each other during end molding, and the fluoroplastic sleeve does not press against the inner fluorocarbon resin tube, so each fluorocarbon resin tube will not be crushed or deformed at the end. It can be reliably joined and integrated with the sleeve without causing any damage.
また、本発明による製造方法によれば、従来の
ようにフツ素樹チユーブのつぶれを阻止するため
の充填剤が不要であるから、作業性が大幅に向上
し、さらにチユーブ内周面に充填剤が残留するこ
ともないので、移送液体の汚染がなく、好都合で
ある。 In addition, according to the manufacturing method of the present invention, there is no need for a filler to prevent the fluorocarbon resin tube from collapsing as in the past, so workability is greatly improved, and the filler is not required on the inner circumferential surface of the tube. Since no residue remains, there is no contamination of the transferred liquid, which is convenient.
［実施例］
第１図はこの発明の製造方法により得られるフ
ツ素樹脂チユーブ束の一実施例を示す一方の端部
を切り欠いた斜視図で、第２図は端部の縦断側面
図である。[Example] Fig. 1 is a perspective view with one end cut away showing an example of a fluororesin tube bundle obtained by the manufacturing method of the present invention, and Fig. 2 is a longitudinal sectional side view of the end. be.
図示のフツ素樹脂チユーブ束１は、束ねられた
複数本のフツ素樹脂チユーブ２と、これらフツ素
樹脂チユーブ２の端部に外嵌されるフツ素樹脂ス
リーブ３と、このフツ素樹脂スリーブ３と前記各
フツ素樹脂チユーブ２とを接合一体化して端部に
気密構造を形成する接合部４から構成されてい
る。 The illustrated fluororesin tube bundle 1 includes a plurality of bundled fluororesin tubes 2, fluororesin sleeves 3 fitted over the ends of these fluororesin tubes 2, and the fluororesin sleeves 3. and each of the fluororesin tubes 2 are joined together to form an airtight structure at the end.
ここで接合部４は、融点以上に加熱すると流動
性を示すPFA等の熱流動性フツ素樹脂からなり、
第２図に詳細に示されるように、隣り合う各フツ
素樹脂チユーブ２間の〓間、及びフツ素樹脂チユ
ーブ２とフツ素樹脂スリーブ３との間の〓間を埋
めてこれらを結着一体化するもので、その形成方
法は、第３図に示すように、まずフツ素樹脂チユ
ーブ２の端部に熱流動性フツ素樹脂からなる熱収
縮チユーブ４ａを外嵌し、これらを複数本束ねて
その端部にフツ素樹脂スリーブ３を外嵌する。そ
して、この端部をヒータ等を用いて加熱すると、
熱収縮チユーブ４ａが収縮して各フツ素樹脂チユ
ーブ２を外側から締め付けるが、その収縮力は内
側のフツ素樹脂チユーブ２の外径を大きく変化さ
せるものではなく、しかも熱収縮チユーブの管壁
は、収縮後に拡張加工前の肉厚に戻りその厚さが
増加するので、加工前にチユーブ間等に存在して
いた〓間が広がることはない。この熱収縮チユー
ブ４ａの締め付けにより、各フツ素樹脂チユーブ
２の径方向への膨脹が抑えられ、隣り合うチユー
ブ同志の圧迫が阻止されるので、フツ素樹脂チユ
ーブ２は軟化状態になつてもつぶれたり、あるい
は変形することがない。さらに加熱すると、熱収
縮チユーブ４ａは、フツ素樹脂チユーブ２の膨脹
を抑えた状態で溶融する。この溶融した熱収縮チ
ユーブ４ａは流動性があるので、フツ素樹脂チユ
ーブ２の径方向外方への若干の膨脹圧と、フツ素
樹脂スリーブ３の径方向内方への膨脹圧により押
圧されて余分な熱流動性フツ素樹脂が、長手方向
に逃げてそれらの膨脹圧を吸収しながらフツ素樹
脂チユーブ２のフツ素樹脂スリーブ３の〓間、及
びフツ素樹脂チユーブ２間の〓間を埋める。そし
て、端部を冷却すると、熱流動性フツ素樹脂がこ
れらを結着せしめて気密一体構造を形成する（第
１図、第２図）。 Here, the joint part 4 is made of a thermofluid fluororesin such as PFA that exhibits fluidity when heated above its melting point,
As shown in detail in FIG. 2, the gaps between adjacent fluororesin tubes 2 and the gaps between the fluororesin tubes 2 and the fluororesin sleeves 3 are filled to bind them together. As shown in Fig. 3, the method for forming it is as follows: First, a heat-shrinkable tube 4a made of heat-flowable fluororesin is fitted onto the end of the fluororesin tube 2, and a plurality of these tubes are bundled together. Then, the fluororesin sleeve 3 is fitted onto the end thereof. Then, when this end is heated using a heater etc.,
The heat-shrinkable tube 4a contracts and tightens each fluororesin tube 2 from the outside, but the contraction force does not significantly change the outer diameter of the inner fluororesin tube 2, and the tube wall of the heat-shrinkable tube After shrinkage, the thickness returns to the thickness before the expansion process and increases, so the gap that existed between the tubes before the process does not widen. By tightening the heat shrinkable tubes 4a, the expansion of each fluororesin tube 2 in the radial direction is suppressed and compression of adjacent tubes is prevented, so that the fluororesin tube 2 does not collapse even in a softened state. It will not bend or deform. When heated further, the heat-shrinkable tube 4a melts while suppressing the expansion of the fluororesin tube 2. Since this melted heat-shrinkable tube 4a has fluidity, it is pressed by a slight radially outward expansion pressure of the fluororesin tube 2 and a radially inward expansion pressure of the fluororesin sleeve 3. The excess heat-flowable fluororesin escapes in the longitudinal direction and absorbs the expansion pressure, filling the spaces between the fluororesin sleeves 3 of the fluororesin tubes 2 and between the fluororesin tubes 2. . When the end portions are cooled, the thermofluid fluororesin binds them together to form an airtight integral structure (FIGS. 1 and 2).
かくして得られるフツ素樹脂チユーブ束１は、
端末成形時に、加熱によるフツ素樹脂チユーブ２
の熱膨脹が抑制されてチユーブ同志の圧迫が阻止
されると共に、フツ素樹脂スリーブ３の内側への
膨脹圧も吸収されることから、成形後のフツ素樹
脂チユーブ２につぶれや変形等の発生がなく、各
フツ素樹脂チユーブ２の開口部は良好に保持され
る。このため、チユーブ束１の一方の端部から各
フツ素樹脂チユーブ２内に流体を流した時に、各
チユーブ２間で流速のバラツキがなく、例えば脱
気装置の脱気管、あるいは熱交換器の伝熱管など
に使用した場合に、安定した脱気、熱交換が可能
になる。なお、これらの用途以外に各種分野にお
ける配管材料として使用することももちろん可能
である。 The thus obtained fluororesin tube bundle 1 is
Fluororesin tube 2 by heating during terminal molding
The thermal expansion of the fluororesin tube 2 is suppressed to prevent compression of the tubes together, and the expansion pressure inside the fluororesin sleeve 3 is also absorbed, so that the fluororesin tube 2 is prevented from collapsing or deforming after molding. Therefore, the opening of each fluororesin tube 2 is well maintained. Therefore, when fluid flows into each fluororesin tube 2 from one end of the tube bundle 1, there is no variation in the flow rate between the tubes 2. When used in heat exchanger tubes, etc., it enables stable deaeration and heat exchange. In addition to these uses, it is of course also possible to use it as a piping material in various fields.
さらに、本発明の製造方法によれば、フツ素樹
脂チユーブ２の潰れを阻止するために、あらかじ
め内部に充填剤を充填する必要がないから、端末
成形時の作業性がよく、しかもチユーブ２の内部
に充填剤が残ることもないので、脱気管のように
高純度の液体を流通させる場合に極めて都合がよ
い。本発明によるフツ素樹脂チユーブ束１を脱気
管として使用する時は、フツ素樹脂チユーブ２と
して、フツ素樹脂の中でも特にガス透過性の大き
いPTFEからなるものが好適であり、この場合、
熱収縮チユーブ４ａとしてはPFAからなるもの
が好適である。さらに、特公昭51−18991号、特
開昭60−104319号等に記載の方法によつて製造さ
れる延伸連続気孔性多孔質四フツ化エチレン樹脂
で形成されたチユーブを通常のPTFEチユーブに
代えて使用すれば、そのチユーブ壁中に多数の微
細な連続気孔を有するものであるから、チユーブ
壁を構成するポリマー分子間を溶存ガス分子が移
動するだけの充実質のプラスチツクチユーブに比
べ、差圧がチユーブ内の液体表面に直接かかるの
でガス透過性が著しく増大し、その結果脱気効率
が大幅に向上する。 Furthermore, according to the manufacturing method of the present invention, there is no need to fill the inside of the fluororesin tube 2 with a filler in advance to prevent it from collapsing. Since there is no filler left inside, it is extremely convenient for distributing high-purity liquids, such as in degassing pipes. When the fluororesin tube bundle 1 according to the present invention is used as a degassing tube, it is preferable that the fluororesin tube 2 is made of PTFE, which has particularly high gas permeability among fluororesins, and in this case,
The heat shrinkable tube 4a is preferably made of PFA. Furthermore, a tube made of stretched continuous porous polytetrafluoroethylene resin manufactured by the method described in Japanese Patent Publication No. 51-18991, Japanese Patent Application Laid-Open No. 60-104319, etc., was replaced with a normal PTFE tube. Since the tube has many fine continuous pores in its wall, the differential pressure is lower than that of a solid plastic tube in which dissolved gas molecules only move between the polymer molecules that make up the tube wall. is applied directly to the liquid surface within the tube, thereby significantly increasing gas permeability and thus greatly improving degassing efficiency.
なお、チユーブ２としてPTFEの代わりに、
PFA、四フツ化エチレン−六フツ化プロピレン
共重合樹脂（FEP）、エチレン−テトラフルオロ
エチレン共重合樹脂（ETFE）などからなるもの
の使用も可能であり、スリーブ３についてもチユ
ーブ２と同様に各種フツ素樹脂からなるものを使
用することができ、これらはチユーブ束１の使用
条件等に応じて適宜選定すればよい。 In addition, instead of PTFE as tube 2,
It is also possible to use materials such as PFA, tetrafluoroethylene-hexafluoropropylene copolymer resin (FEP), and ethylene-tetrafluoroethylene copolymer resin (ETFE). Those made of base resin can be used, and these may be appropriately selected depending on the usage conditions of the tube bundle 1.
また、溶融固化して接合部４となる熱収縮チユ
ーブ４ａを構成する熱流動性フツ素樹脂として
は、PFA、FEP、ETFEなどの使用が可能であ
り、その肉厚、収縮率等については、フツ素樹脂
チユーブ２の本数、外径、肉厚等に応じて選択さ
れる。 In addition, PFA, FEP, ETFE, etc. can be used as the heat-flowable fluororesin constituting the heat-shrinkable tube 4a that becomes the joint part 4 by melting and solidifying, and its wall thickness, shrinkage rate, etc. It is selected depending on the number, outer diameter, wall thickness, etc. of the fluororesin tubes 2.
［発明の効果］
以上説明したように、この発明によるフツ素樹
脂チユーブ束の製造方法では、熱流動性フツ素樹
脂からなる熱収縮チユーブがフツ素樹脂チユーブ
の膨脹を抑えながら溶融固化して各フツ素樹脂チ
ユーブとフツ素樹脂スリーブとの接合一体化せし
めるから、チユーブ端部に潰れや変形が発生しな
い。したがつて、かかる方法によつて得られるフ
ツ素樹脂チユーブ束は、各チユーブにおいて流速
に差が生じないので、脱気管や伝熱管として使用
したときに良好な性能を得ることができる。[Effects of the Invention] As explained above, in the method for manufacturing a fluororesin tube bundle according to the present invention, the heat-shrinkable tubes made of a heat-flowable fluororesin are melted and solidified while suppressing the expansion of the fluororesin tubes, so that each Since the fluororesin tube and the fluororesin sleeve are integrally joined, crushing or deformation does not occur at the end of the tube. Therefore, the fluororesin tube bundle obtained by this method has no difference in flow rate between the tubes, so that it can provide good performance when used as a degassing tube or a heat transfer tube.
また、この製造方法によれば、端末成形時にチ
ユーブ内部に充填剤を充填する必要がないから作
業性がよく、しかもチユーブ内面に残留物も残ら
ないので、フツ素樹脂本来の非汚染性が保持され
て移送液体を汚染することがなく、配管材として
使用する場合にきわめて都合がよい。 In addition, this manufacturing method does not require filling the inside of the tube with a filler during terminal molding, resulting in good workability.Furthermore, since no residue remains on the inside of the tube, the non-contaminating properties inherent to fluororesin are maintained. It is extremely convenient when used as a piping material because it does not contaminate the transferred liquid.
なお、この発明は上記実施例に限定されるもの
ではなく、例えばスリーブの形状を変更したり、
チユーブ本数を増減して実施したり、あるいは端
末成形を一端部のみに行なうなど、この発明の技
術思想内での種々の変更はもちろん可能である。 Note that the present invention is not limited to the above embodiments, and for example, the shape of the sleeve may be changed,
Of course, various changes within the technical idea of the present invention are possible, such as increasing or decreasing the number of tubes, or performing terminal molding only on one end.
第１図はこの発明により得られるフツ素樹脂チ
ユーブ束の一実施例を示す一方の端部を切り欠い
た斜視図、第２図は端部の縦断側面図、第３図は
加熱前の端面図である。
２：フツ素樹脂チユーブ、３：フツ素樹脂スリ
ーブ、４：接合部、４ａ：熱収縮チユーブ。
Fig. 1 is a perspective view with one end cut away, showing an embodiment of a fluororesin tube bundle obtained by the present invention, Fig. 2 is a longitudinal cross-sectional side view of the end, and Fig. 3 is an end face before heating. It is a diagram. 2: Fluorine resin tube, 3: Fluorine resin sleeve, 4: Joint portion, 4a: Heat shrinkable tube.
Claims (1)
をほぼ密接状態で端部に外嵌したフツ素樹脂チユ
ーブを複数本束ね、これらフツ素樹脂チユーブの
束の端部にフツ素樹脂スリーブをほぼ密接状態に
外嵌し、次いでこの端部を前記熱収縮チユーブの
融点以上の温度に加熱することにより、該熱収縮
チユーブを収縮させながら溶融して、前記フツ素
樹脂チユーブとスリーブとを接合一体化し、しか
る後に該接合部を冷却固化する工程を含むフツ素
樹脂チユーブ束の製造方法。1 A plurality of fluororesin tubes each having a heat-shrinkable tube made of a heat-flowable fluororesin fitted onto the end thereof in a nearly intimate manner are bundled, and a fluororesin sleeve is approximately closely fitted to the end of the bundle of these fluororesin tubes. Then, by heating this end portion to a temperature higher than the melting point of the heat-shrinkable tube, the heat-shrinkable tube is melted while shrinking, and the fluororesin tube and sleeve are joined and integrated. A method for producing a fluororesin tube bundle, comprising the steps of: , and then cooling and solidifying the joined portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28577187A JPH01131392A (en) | 1987-11-12 | 1987-11-12 | Fluoroplastic tube bundle and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28577187A JPH01131392A (en) | 1987-11-12 | 1987-11-12 | Fluoroplastic tube bundle and manufacture thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01131392A JPH01131392A (en) | 1989-05-24 |
| JPH0350156B2 true JPH0350156B2 (en) | 1991-07-31 |
Family
ID=17695846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28577187A Granted JPH01131392A (en) | 1987-11-12 | 1987-11-12 | Fluoroplastic tube bundle and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01131392A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000057308A (en) * | 1996-12-03 | 2000-09-15 | 이노우에 노리유끼 | Method for bonding and molding modified polytetrafluoroethylene moldings |
| KR100429014B1 (en) * | 2000-12-09 | 2004-04-28 | 전정자 | Machine for manufacturing a resin tube with multiple inner conduits and the tube manufactured |
| JP6399262B1 (en) * | 2017-02-15 | 2018-10-03 | Nok株式会社 | Method for joining blade for blade reinforced hollow fiber membrane and method for producing blade reinforced porous hollow fiber membrane |
| CN114206479B (en) | 2019-08-13 | 2024-03-22 | Dic株式会社 | Pipe unit and degassing module |
| JP7420249B2 (en) * | 2020-06-08 | 2024-01-23 | Dic株式会社 | Tube unit, degassing module, and tube unit manufacturing method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60259898A (en) * | 1984-05-29 | 1985-12-21 | Nippon Valqua Ind Ltd | Heat exchanger made from fluorine resin and manufacture thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5812788U (en) * | 1981-07-18 | 1983-01-26 | 株式会社フジクラ | Shrink tube for corrugated pipe connection |
-
1987
- 1987-11-12 JP JP28577187A patent/JPH01131392A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60259898A (en) * | 1984-05-29 | 1985-12-21 | Nippon Valqua Ind Ltd | Heat exchanger made from fluorine resin and manufacture thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01131392A (en) | 1989-05-24 |
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