JP2006137069A - Method for joining fluorocarbon resin molding and fluorocarbon resin joined body - Google Patents

Method for joining fluorocarbon resin molding and fluorocarbon resin joined body Download PDF

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Publication number
JP2006137069A
JP2006137069A JP2004328062A JP2004328062A JP2006137069A JP 2006137069 A JP2006137069 A JP 2006137069A JP 2004328062 A JP2004328062 A JP 2004328062A JP 2004328062 A JP2004328062 A JP 2004328062A JP 2006137069 A JP2006137069 A JP 2006137069A
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Japan
Prior art keywords
fluororesin
joining
concave
shape
pipe
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JP2004328062A
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Yukio Ota
幸生 大田
Masanori Oma
正則 尾間
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Shiizu KK
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Shiizu KK
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Priority to JP2004328062A priority Critical patent/JP2006137069A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/82—Testing the joint
    • B29C65/8253—Testing the joint by the use of waves or particle radiation, e.g. visual examination, scanning electron microscopy, or X-rays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/124—Tongue and groove joints
    • B29C66/1244—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue
    • B29C66/12443—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue having the tongue substantially in the middle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/124—Tongue and groove joints
    • B29C66/1246—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove
    • B29C66/12463—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove being tapered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/124—Tongue and groove joints
    • B29C66/1246—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove
    • B29C66/12469—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove being asymmetric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2422—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical
    • B29C66/24221—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical being circular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B29C66/322—Providing cavities in the joined article to collect the burr
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/547—Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles, e.g. endless tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/547—Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles, e.g. endless tubes
    • B29C66/5472—Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles, e.g. endless tubes for making elbows or V-shaped pieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0065—Permeability to gases
    • B29K2995/0067—Permeability to gases non-permeable

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Fuel Cell (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for joining fluorocarbon resin moldings to each other while quality including pressure strength, airtightness, mechanical strength, dimensional accuracy and an appearance shape is secured and a joined body obtained by the method. <P>SOLUTION: In the method for joining the fluorocarbon resin moldings to each other by ultrasonic welding, with regard to the cross sections of joining parts to be ultrasonically welded, one is convex, and the other is concave to be engaged with the convex part and ultrasonically welded to the side of the convex part while being engaged in a shape in which the tip width of the convex part is larger than the base width of the concave part. A slope in the direction making the base width of the concave part narrower than the upper surface width of the concave part is provided on at least one side of the inside surface of the concave part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、超音波溶着によりフッ素樹脂成形体を接合する方法であって、特に燃料電池用パイプの製造に用いられる方法に関する。   The present invention relates to a method for joining a fluororesin molded body by ultrasonic welding, and particularly to a method used for manufacturing a pipe for a fuel cell.

フッ素樹脂成形体は、耐熱性、耐薬品性、電気絶縁性などに優れた部材であり、各工業分野において使用されている。近年、環境・エネルギー問題対策として燃料電池自動車の開発が進められており、該燃料電池の部材としてもフッ素樹脂成形体が用いられている。例えば、その燃料電池用パイプとして、金属ガス配管の内面を耐熱性、耐酸性のあるフッ素樹脂のフィルムなどで被覆し保護したもの（特許文献１参照）や、配管自体をフッ素樹脂成形体としたものなどがある。フッ素樹脂を利用するのは、燃料電池における燃料電池用パイプは、水素−高温水蒸気混合ガスなどに晒されるので、ＳＵＳ製などの金属製パイプを用いた場合では、金属イオンが溶出して燃料電池触媒が被毒劣化する、水素ガスが管に浸透し金属管が脆化する、または導電性であり燃料電池の電気絶縁性を担保できず漏電が起こるなどの問題があるためである。   The fluororesin molded body is a member excellent in heat resistance, chemical resistance, electrical insulation and the like, and is used in various industrial fields. In recent years, development of fuel cell vehicles has been promoted as a countermeasure for environmental and energy problems, and a fluororesin molded body is also used as a member of the fuel cell. For example, as the fuel cell pipe, a metal gas pipe whose inner surface is covered and protected with a heat- and acid-resistant fluororesin film (see Patent Document 1), or the pipe itself is a fluororesin molded body. There are things. Fluorine resin is used because the fuel cell pipe in the fuel cell is exposed to a hydrogen-high temperature steam mixed gas or the like, so that when a metal pipe such as SUS is used, the metal ions are eluted and the fuel cell This is because the catalyst is poisoned and deteriorated, hydrogen gas permeates into the tube and the metal tube becomes brittle, or is electrically conductive and cannot ensure the electric insulation of the fuel cell, resulting in leakage.

燃料電池用パイプでは、パイプ本体にフッ素樹脂成形体からなるフランジおよびその他の連結部位を接合しているものがある。この接合方法としては一般的に接着剤による接着、溶接、振動溶着、高周波溶着、熱溶着、レーザー溶着などが用いられている。従来フッ素樹脂の接合を行なうものとして例えば、接合する樹脂を融点が低く、かつ動摩擦係数の大きいものに限定して振動溶着するもの（特許文献２参照）などがある。
また、パイプの形状が３次元的にねじれた複雑形状である場合は、型抜きができず射出成形による成形が困難となるため、主にブロー成形などにより成形されている。 In some fuel cell pipes, a flange made of a fluororesin molded body and other connecting parts are joined to the pipe body. As this joining method, bonding with an adhesive, welding, vibration welding, high frequency welding, heat welding, laser welding, or the like is generally used. Conventionally, what joins fluororesin includes, for example, one that joins vibrationally by limiting the resin to be joined to one having a low melting point and a large dynamic friction coefficient (see Patent Document 2).
In addition, when the shape of the pipe is a complicated shape twisted three-dimensionally, it is difficult to perform die cutting and it is difficult to form by injection molding. Therefore, the pipe is mainly formed by blow molding or the like.

上記のように近年における燃料電池分野、またはその他半導体分野などでは、優れた特性を有するフッ素樹脂成形体、および複雑形状の部材としてそれらの接合体が必要とされており、該接合体においては高い寸法精度が求められている。
しかしながら、フッ素樹脂成形体は結晶性樹脂であり、一般に摩擦係数が小さく、溶融温度が高いという特徴があるため、該成形体を、加熱溶着、振動溶着などにより接合すると、耐圧強度、気密性、機械的強度、寸法精度、外観形状などの品質を維持することが困難であるという問題がある。また、超音波溶着では接合自体が困難であった。また、フッ素樹脂成形体は、ブロー成形により成形した場合では、寸法精度が悪く肉厚の均一性を担保できないなどの問題がある。
特開平５−８９９０３号公報（特許請求の範囲） 特開２０００−２１８６９７号公報（特許請求の範囲） As described above, in the recent fuel cell field or other semiconductor fields, a fluororesin molded body having excellent characteristics and a joined body thereof as a member having a complicated shape are required. Dimensional accuracy is required.
However, since the fluororesin molded body is a crystalline resin and generally has a low coefficient of friction and a high melting temperature, when the molded body is joined by heat welding, vibration welding, etc., pressure resistance strength, air tightness, There is a problem that it is difficult to maintain quality such as mechanical strength, dimensional accuracy, and external shape. Further, the joining itself is difficult by ultrasonic welding. Further, when the fluororesin molded body is molded by blow molding, there is a problem that the dimensional accuracy is poor and the thickness uniformity cannot be ensured.
JP-A-5-89903 (Claims) JP 2000-218697 A (Claims)

本発明はこのような問題に対処するためになされたもので、フッ素樹脂成形体同士を耐圧強度、気密性、機械的強度、寸法精度、外観形状などの品質を確保しつつ接合する方法および該方法により得られた接合体を提供することを目的とする。   The present invention has been made to cope with such problems, and a method of joining the fluororesin moldings together while ensuring quality such as pressure-resistant strength, airtightness, mechanical strength, dimensional accuracy, and appearance shape, and the like It aims at providing the joined_body | zygote obtained by the method.

フッ素樹脂成形体同士を超音波溶着により接合する方法であって、上記超音波溶着される接合部の断面は、一方が凸形状で、他方が上記凸形状の凸部に嵌合できる凹形状で、かつ上記凸形状の凸部先端幅が上記凹形状の凹部底面幅よりも大きい形状で嵌合されつつ該凸部の側面で超音波溶着されてなることを特徴とする。
また、上記凹形状の凹部内側面の少なくとも一方の側面に凹部底面幅を凹部上面幅よりも狭くする方向の傾斜面を有することを特徴とする。
また、上記フッ素樹脂成形体が、ポリフッ化ビニリデン樹脂成形体であることを特徴とする。 This is a method of joining fluororesin moldings by ultrasonic welding, and the cross section of the joint part to be ultrasonically welded has a convex shape on one side and a concave shape that can be fitted on the convex part on the other side. In addition, it is characterized by being ultrasonically welded on the side surface of the convex portion while being fitted in a shape in which the leading end width of the convex portion is larger than the bottom surface width of the concave portion.
Further, at least one side surface of the concave concave inner surface has an inclined surface in a direction in which the concave bottom surface width is narrower than the concave upper surface width.
Further, the fluororesin molded body is a polyvinylidene fluoride resin molded body.

本発明のフッ素樹脂接合体は、フッ素樹脂成形体同士を超音波溶着により接合して得られたフッ素樹脂接合体であって、上記接合方法により接合されたことを特徴とする。
また、該接合体は、燃料電池用パイプであることを特徴とする。 The fluororesin joined body of the present invention is a fluororesin joined body obtained by joining fluororesin molded bodies by ultrasonic welding, and is characterized by being joined by the joining method described above.
The joined body is a fuel cell pipe.

本発明の接合方法は、その超音波溶着される接合部の断面が、一方が凸形状で、他方が上記凸形状の凸部に嵌合できる凹形状で、かつ上記凸形状の凸部先端幅が上記凹形状の凹部底面幅よりも大きい形状で嵌合されつつ該凸部の側面で超音波溶着されてなるので、超音波溶着によるフッ素樹脂成形体同士の接合が可能となる。さらに、フッ素樹脂成形体を、耐圧強度、気密性、機械的強度、寸法精度、外観形状などの品質を確保しつつ接合することができる。   In the bonding method of the present invention, the ultrasonic welded section has a convex cross section, one of which has a convex shape and the other has a concave shape that can be fitted to the convex shape of the convex shape, and the convex portion tip width of the convex shape. Are joined in a shape larger than the concave bottom surface width of the concave shape and are ultrasonically welded on the side surface of the convex portion, so that the fluororesin molded bodies can be joined to each other by ultrasonic welding. Furthermore, it is possible to join the fluororesin moldings while ensuring quality such as pressure resistance, air tightness, mechanical strength, dimensional accuracy, and external shape.

本発明のフッ素樹脂接合体は、上記接合方法により接合されるので、耐圧強度、気密性、機械的強度、寸法精度、外観形状などに優れる。   Since the fluororesin bonded body of the present invention is bonded by the above bonding method, it is excellent in pressure strength, air tightness, mechanical strength, dimensional accuracy, appearance shape, and the like.

本発明の燃料電池用パイプは、燃料電池の排気側での電解質に対して防食対応させたパイプであり、例えば、燃料電池用の排気管、ガス配管などである。
本発明のフッ素樹脂成形体同士の接合方法を図１および図２を参照して説明する。図１は、燃料電池用パイプ１として燃料電池用排気管の分解斜視図を、図２（ａ）は図１における超音波溶着後の接合部のＡ−Ａ断面図を、図２（ｂ）は図２（ａ）における超音波溶着前のＢ部拡大断面図をそれぞれ示す。
燃料電池用パイプ１は、図１に示すようにフッ素樹脂成形体であるハイプ本体２と、該パイプ同士を連結するため、または、該パイプを燃料電池の任意位置に固定するための連結部材３などからなる。ここで、連結部材３もフッ素樹脂成形体であり、パイプ本体２に超音波溶着により溶着接合されている。 The fuel cell pipe of the present invention is a pipe that is anticorrosive to the electrolyte on the exhaust side of the fuel cell, and is, for example, an exhaust pipe or a gas pipe for a fuel cell.
A method for joining the fluororesin molded bodies of the present invention will be described with reference to FIGS. 1 is an exploded perspective view of a fuel cell exhaust pipe as a fuel cell pipe 1, FIG. 2 (a) is a cross-sectional view taken along line AA of FIG. 1 after ultrasonic welding, and FIG. 2 (b). FIG. 2 shows an enlarged cross-sectional view of part B before ultrasonic welding in FIG.
As shown in FIG. 1, the fuel cell pipe 1 includes a hype body 2 that is a fluororesin molded body and a connecting member 3 for connecting the pipes to each other or fixing the pipe to an arbitrary position of the fuel cell. Etc. Here, the connecting member 3 is also a fluororesin molded body, and is welded and joined to the pipe body 2 by ultrasonic welding.

燃料電池用パイプ１の接合部を図２（ｂ）により説明する。超音波溶着される接合部４の断面は、連結部材３の接合部断面が凸形状３ａで、パイプ本体２の接合部断面が凹形状２ａであり、相互に嵌合できる形状をしており、かつ凸部先端幅Ｄが凹形状の凹部底面幅ｄ2よりも大きい形状である。
詳細には、パイプ本体２の凹形状２ａが、内側面２ｂおよび２ｃと、凹部底面２ｄとから構成され、内側面２ｂに凹部の上部内幅ｄ1を狭くする方向の傾斜面２ｅを有している。傾斜面２ｅを有する凹形状２ａに凸形状３ａを嵌合して超音波振動を印加することにより、接触部における変形歪の発熱が内側面２ｂと凸形状３ａの側面３ｂとで発生し該部位で溶着される。
具体的工程としては、連結部材３の凸形状３ａとパイプ本体２の凹形状２ａとを嵌合させ、超音波振動を発生させながら加圧して、相互に圧入する。この工程により、凹形状の凹部側面で超音波溶着する。ここで超音波溶着条件は、樹脂材料、凹凸形状等によって異なるが、超音波振動ホーンの振幅は、凹凸形状の嵌合上下方向に 25〜50μm 、周波数は、15〜20 kHz で行なうのが溶着強度および気密度を高めるので好ましい。
なお、パイプ本体２側に凸形状を、連結部材３側に凹形状を設けてもよい。 A joint portion of the fuel cell pipe 1 will be described with reference to FIG. The cross section of the joint portion 4 to be ultrasonically welded has a shape in which the joint portion cross section of the connecting member 3 is a convex shape 3a and the cross section of the joint portion of the pipe body 2 is a concave shape 2a, and can be fitted to each other. and Totsubu tip width D is larger shape than concave recess bottom width d 2.
Specifically, concave 2a of the pipe body 2 has an inner surface 2b and 2c, is composed of a bottom surface of the recess 2d, the direction of the inclined surface 2e of narrowing the upper inner width d 1 of the concave portion on the inner surface 2b ing. By fitting the convex shape 3a to the concave shape 2a having the inclined surface 2e and applying ultrasonic vibration, heat of deformation strain at the contact portion occurs on the inner side surface 2b and the side surface 3b of the convex shape 3a. It is welded with.
As a specific process, the convex shape 3a of the connecting member 3 and the concave shape 2a of the pipe body 2 are fitted, pressurized while generating ultrasonic vibration, and press-fitted together. By this step, ultrasonic welding is performed on the concave side surface of the concave shape. Here, the ultrasonic welding conditions vary depending on the resin material, uneven shape, etc., but the amplitude of the ultrasonic vibration horn is 25-50 μm in the vertical direction of the uneven shape, and the frequency is 15-20 kHz. This is preferable because it increases strength and airtightness.
In addition, you may provide a convex shape in the pipe main body 2 side, and a concave shape in the connection member 3 side.

傾斜面２ｅは、凹部の内幅ｄ1が底面２ｄ方向に向かって狭くなる形状であり、内側面２ｂまたは内側面２ｃの片側面、あるいは内側面２ｂおよび内側面２ｃの両側面にあってもよい。
また、接合体の外観形状を維持するため、凹形状２ａの深さｄ4を凸形状３ａの長さｄ3より、余剰溶融物が溢れでない程度深くする。
凸形状３ａの形状は、その先端幅Ｄを凹部の上部内幅ｄ1よりも約０．０５ｍｍのクリアランスをもたせた形状とすることが好ましい。該形状とすることにより、溶着振動をかける前に嵌合先端部の凹凸を誘い込ませてパイプ本体２と連結部材３とを押えて変形などを矯正させることができる。その押えを保持しながら溶着振動をかけることによって全周を均一に溶着することが可能となる。
また、凹部上部入口への凸部の嵌合を容易とするためテーパー２ｆを設けることが好ましい。 Inclined surface 2e is the inner width d 1 of the concave portion is narrower shape toward the bottom surface 2d direction, even on both sides of the inner surface 2b or one side of the inner side surface 2c or the inner surface 2b and the inner surface 2c, Good.
Further, in order to maintain the external shape of the assembly, the depth d 4 of the concave 2a convex 3a than the length d 3, deep extent that surplus melt does not overflow.
The shape of convex 3a is preferably the tip width D and shape remembering about 0.05mm clearance than the upper inner width d 1 of the concave portion. By adopting such a shape, it is possible to correct the deformation and the like by pushing the pipe main body 2 and the connecting member 3 by introducing the unevenness of the fitting tip before applying welding vibration. By applying welding vibration while holding the presser, it is possible to weld the entire circumference uniformly.
Further, it is preferable to provide a taper 2f in order to facilitate the fitting of the convex part to the concave part upper entrance.

以上の結果、パイプ本体２と連結部材３とは、凸形状３ａと凹形状２ａとの側面で超音波溶着されることになり、溶着面積が増大し超音波溶着部の溶着強度が向上する。また、凹凸の嵌合を利用するため、接合部周囲でのバリ発生などを防止でき寸法精度、外観形状にも優れる。よって、従来は困難であったフッ素樹脂成形体同士の溶着も高品質で行なうことができ、該フッ素樹脂製の燃料電池用パイプ１においても、その機密性、寸法精度などに優れる。   As a result, the pipe body 2 and the connecting member 3 are ultrasonically welded on the side surfaces of the convex shape 3a and the concave shape 2a, so that the welding area is increased and the welding strength of the ultrasonic welding portion is improved. In addition, since the uneven fitting is used, it is possible to prevent the occurrence of burrs around the joint, and the dimensional accuracy and the external shape are excellent. Therefore, welding of fluororesin molded bodies, which has been difficult in the past, can be performed with high quality, and the fuel cell pipe 1 made of fluororesin is excellent in confidentiality, dimensional accuracy, and the like.

本発明の接合方法を使用できるフッ素樹脂成形体を構成するフッ素樹脂としては、ポリフッ化ビニリデン樹脂（以下、ＰＶＤＦと略する）、ポリクロロトリフルオロエチレン樹脂（以下、ＰＣＴＦＥと略する）、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体（以下、ＰＦＡと略する）、ポリテトラフルオロエチレン樹脂、テトラフルオロエチレン−ヘキサフルオロプロピレン共重合体樹脂、ポリクロロトリフルオロエチレン樹脂、テトラフルオロエチレン−エチレン共重合体樹脂、クロロトリフルオロエチレン−エチレン共重合体樹脂、テトラフルオロエチレン−ヘキサフルオロプロピレン−パーフルオロアルキルビニルエーテル共重合体樹脂等が挙げられる。フッ素樹脂成形体は、こららのフッ素樹脂単体、または、各種強化材、添加剤等の充填材を含有させたもので形成する。   Examples of the fluororesin constituting the fluororesin molded body that can use the bonding method of the present invention include polyvinylidene fluoride resin (hereinafter abbreviated as PVDF), polychlorotrifluoroethylene resin (hereinafter abbreviated as PCTFE), and tetrafluoro. Ethylene-perfluoroalkyl vinyl ether copolymer (hereinafter abbreviated as PFA), polytetrafluoroethylene resin, tetrafluoroethylene-hexafluoropropylene copolymer resin, polychlorotrifluoroethylene resin, tetrafluoroethylene-ethylene copolymer Examples thereof include a coalesced resin, a chlorotrifluoroethylene-ethylene copolymer resin, a tetrafluoroethylene-hexafluoropropylene-perfluoroalkyl vinyl ether copolymer resin, and the like. The fluororesin molded body is formed of these fluororesin alone or containing a filler such as various reinforcing materials and additives.

燃料電池用パイプ、例えば、その使用条件が厳しい燃料電池車等の燃料電池用排気管としては、低温−４０℃から高温１４０℃にて熱安定性があり、溶着加工性が良好という理由からＰＶＤＦ成形体を用いることが好ましい。
また、本発明の接合方法では、従来超音波溶着が困難であるとされてきた、上記ＰＶＤＦよりも融点が高いＰＣＴＦＥについても容易に高品質で接合可能である。 Pipes for fuel cells, for example, exhaust pipes for fuel cells such as fuel cell vehicles whose use conditions are severe, are PVDF because they have thermal stability from low temperatures of -40 ° C to high temperatures of 140 ° C and good weldability. It is preferable to use a molded body.
Further, with the bonding method of the present invention, PCTFE having a melting point higher than that of the PVDF, which has been conventionally difficult to ultrasonically weld, can be easily bonded with high quality.

半管状部分２つを接合して製造した燃料電池用パイプ１を図３および図４を参照して説明する。図３は、燃料電池用パイプ１として燃料電池用排気管の分解斜視図を、図４は図３における接合部のＣ−Ｃ断面図をそれぞれ示す。
燃料電池用パイプ１は、半管状部分２ａとおよび２ｂとからなるパイプ本体２を主要構成部位としている。半管状部分２ａと半管状部分２ｂとの接合部４が超音波溶着される。また、パイプ本体２には、半管状部分２ａおよび２ｂとの接合により構成される連結部材３などが設けられている。
半管状部分２ａとおよび２ｂは、この両部分を接合することで燃料電池用パイプ１を形成できる形状であればよい。特に、図３に示すように半管状部分２ａと、半管状部分２ｂとの接合面が平面に近い形状が好ましい。該形状とすることにより、各部位を射出成形などにより成形するときに金型の無理抜き部分が少なくなり、成形容易となる。
超音波溶着前の半管状部分２ａと半管状部分２ｂとの接合部拡大断面は図２と同様であり、その超音波溶着過程は上記パイプ本体と連結部材とを接合する場合と同様である。
なお、より３次元的に複雑な形状の燃料電池用パイプの場合では、パイプ本体を３つ以上の部位に分割して成形し、これらを上記超音波溶着により接合させてもよい。 A fuel cell pipe 1 manufactured by joining two semi-tubular portions will be described with reference to FIGS. 3 is an exploded perspective view of an exhaust pipe for a fuel cell as the fuel cell pipe 1, and FIG. 4 is a cross-sectional view taken along a line CC in FIG.
The fuel cell pipe 1 has a pipe body 2 composed of semi-tubular portions 2a and 2b as a main component. The joint 4 between the semi-tubular portion 2a and the semi-tubular portion 2b is ultrasonically welded. Further, the pipe body 2 is provided with a connecting member 3 constituted by joining the semi-tubular portions 2a and 2b.
The semi-tubular portions 2a and 2b may have any shape as long as the fuel cell pipe 1 can be formed by joining the two portions. In particular, as shown in FIG. 3, a shape in which the joining surface between the semi-tubular portion 2a and the semi-tubular portion 2b is close to a plane is preferable. By adopting such a shape, when each part is formed by injection molding or the like, the number of parts forcibly removed from the mold is reduced and molding becomes easy.
The enlarged cross-section of the joint between the semi-tubular portion 2a and the semi-tubular portion 2b before ultrasonic welding is the same as in FIG. 2, and the ultrasonic welding process is the same as when the pipe body and the connecting member are joined.
In the case of a fuel cell pipe having a more complicated shape in three dimensions, the pipe body may be divided into three or more parts and formed, and these may be joined by the ultrasonic welding.

実施例１〜実施例５
図１に示す形状の燃料電池用パイプ１を、ＰＶＤＦ成形体からなるパイプ本体２（外径φ２５ｍｍ）と、ＰＶＤＦロッドを切削加工した連結部材３（外径φ７５ｍｍ）とを超音波溶着により接合して得た。
超音波溶着は、超音波溶着機としてＢＲＡＮＳＯＮ２０００シリーズを使用し、周波数２０ｋＨｚ、振幅５０μｍ、溶着時間一定（０．１０秒）等の条件下で行なった。
得られた成形体について、気密確認実験、引張り試験を行なった。結果を表１に示す。なお、気密確認実験は、パイプ両端を密封し、片側よりエアーを ０．０１ＭＰａ 投入し水中にて気泡発生の有無を確認した。気泡の発生無しの場合を「ＯＫ」とした。
また、実施例１で得られた接合部の断面写真を図５に示す。
Examples 1 to 5
A fuel cell pipe 1 having the shape shown in FIG. 1 is joined by ultrasonic welding of a pipe body 2 (outer diameter φ25 mm) made of a PVDF molded body and a connecting member 3 (outer diameter φ75 mm) obtained by cutting a PVDF rod. I got it.
The ultrasonic welding was performed using a BRANSON 2000 series as an ultrasonic welding machine under conditions such as a frequency of 20 kHz, an amplitude of 50 μm, and a constant welding time (0.10 seconds).
The obtained molded body was subjected to an airtightness confirmation experiment and a tensile test. The results are shown in Table 1. In addition, in the airtightness confirmation experiment, both ends of the pipe were sealed, and 0.01 MPa of air was introduced from one side to confirm the presence or absence of bubbles in water. The case where no bubble was generated was defined as “OK”.
Moreover, the cross-sectional photograph of the junction part obtained in Example 1 is shown in FIG.

実施例６〜実施例１０
図６に溶着試験用の配管の分解斜視図を示す。なお、図６において超音波溶着接合部の断面図（Ａ’−Ａ’断面図）は図２と同様である。
図６に示すように、ＰＣＴＦＥロッドを切削加工して、パイプ５（外径φ２５ｍｍ）およびパイプ６（外径φ２５ｍｍ）を作製し、該パイプ同士を超音波溶着により接合した。
超音波溶着は、超音波溶着機としてＢＲＡＮＳＯＮ２０００シリーズを使用し、周波数２０ｋＨｚ、振幅５０μｍ、沈み込み量一定（０．９０ｍｍ）等の条件下で行なった。
得られた成形体について、気密確認実験、引張り試験を行なった。結果を表２に示す。なお、気密確認実験は、パイプ両端を密封し、片側よりエアーを ０．０１ＭＰａ 投入し水中にて気泡発生の有無を確認した。気泡の発生無しの場合を「ＯＫ」とした。
Example 6 to Example 10
FIG. 6 shows an exploded perspective view of a pipe for welding test. In FIG. 6, the cross-sectional view (A′-A ′ cross-sectional view) of the ultrasonic welded joint is the same as FIG.
As shown in FIG. 6, the PCTFE rod was cut to produce a pipe 5 (outer diameter φ25 mm) and a pipe 6 (outer diameter φ25 mm), and the pipes were joined by ultrasonic welding.
The ultrasonic welding was performed using a BRANSON 2000 series as an ultrasonic welding machine under conditions such as a frequency of 20 kHz, an amplitude of 50 μm, and a constant sinking amount (0.90 mm).
The obtained molded body was subjected to an airtightness confirmation experiment and a tensile test. The results are shown in Table 2. In addition, in the airtightness confirmation experiment, both ends of the pipe were sealed, and 0.01 MPa of air was introduced from one side to confirm the presence or absence of bubbles in water. The case where no bubble was generated was defined as “OK”.

各実施例より、本発明で得られた接合体は、優れた気密性および機械的強度を有していた。また、図５に示すように、接合体断面は超音波溶着により両部材が完全に一体化していた。   From each Example, the joined body obtained by the present invention had excellent airtightness and mechanical strength. Moreover, as shown in FIG. 5, both members were completely integrated in the joined body cross section by ultrasonic welding.

フッ素樹脂成形体の接合方法は、耐圧強度、気密性、機械的強度、寸法精度、外観形状などの品質を確保しつつ接合できるので、燃料電池分野、半導体分野などの分野におけるフッ素樹脂接合体の製造に好適に用いることができる。   Since the bonding method of the fluororesin molded body can be bonded while ensuring quality such as pressure resistance, air tightness, mechanical strength, dimensional accuracy, appearance shape, etc., the fluororesin molded body in the fields of fuel cells, semiconductors, etc. It can use suitably for manufacture.

本発明の一実施例に係る燃料電池車用の排気管の分解斜視図である。1 is an exploded perspective view of an exhaust pipe for a fuel cell vehicle according to an embodiment of the present invention. 図１および図６における、Ａ−Ａ断面図（Ａ’−Ａ’断面図）およびＢ部拡大断面図である。FIG. 7 is a cross-sectional view taken along line AA (cross-sectional view taken along line A′-A ′) and an enlarged cross-sectional view of a portion B in FIGS. 本発明の他の実施例に係る燃料電池車用の排気管の分解斜視図である。It is a disassembled perspective view of the exhaust pipe for fuel cell vehicles concerning other examples of the present invention. 図３におけるＣ−Ｃ断面図である。It is CC sectional drawing in FIG. フッ素樹脂接合体の接合部の断面写真図である。It is a cross-sectional photograph figure of the junction part of a fluororesin joined body. 本発明の溶着試験用配管の分解斜視図である。It is a disassembled perspective view of the piping for welding tests of this invention.

符号の説明Explanation of symbols

１ 燃料電池用パイプ
２ パイプ本体
３ 連結部材
４ 接合部
５ パイプ
６ パイプ DESCRIPTION OF SYMBOLS 1 Fuel cell pipe 2 Pipe main body 3 Connecting member 4 Joint part 5 Pipe 6 Pipe

Claims (5)

フッ素樹脂成形体同士を超音波溶着により接合する方法であって、
前記超音波溶着される接合部の断面は、一方が凸形状で、他方が前記凸形状の凸部に嵌合できる凹形状で、かつ前記凸形状の凸部先端幅が前記凹形状の凹部底面幅よりも大きい形状で嵌合されつつ該凸部の側面で超音波溶着されてなることを特徴とするフッ素樹脂成形体の接合方法。 It is a method of joining fluororesin moldings by ultrasonic welding,
The cross section of the ultrasonic welded portion has a convex shape on one side, a concave shape that can be fitted to the convex shape on the other side, and a concave bottom surface having a convex tip end width. A method for joining a fluororesin molded article, characterized in that ultrasonic welding is performed on a side surface of the convex portion while being fitted in a shape larger than the width. 前記凹形状の凹部内側面の少なくとも一方の側面に凹部底面幅を凹部上面幅よりも狭くする方向の傾斜面を有することを特徴とする請求項１記載のフッ素樹脂成形体の接合方法。   The method for joining fluororesin moldings according to claim 1, wherein at least one side surface of the concave inner surface of the concave portion has an inclined surface in a direction in which the concave bottom surface width is narrower than the concave upper surface width. 前記フッ素樹脂成形体が、ポリフッ化ビニリデン樹脂成形体であることを特徴とする請求項１または請求項２記載のフッ素樹脂成形体の接合方法   3. The method for bonding a fluororesin molded body according to claim 1, wherein the fluororesin molded body is a polyvinylidene fluoride resin molded body. フッ素樹脂成形体同士を超音波溶着により接合して得られたフッ素樹脂接合体であって、請求項１、請求項２または請求項３記載の接合方法により接合されたことを特徴とするフッ素樹脂接合体。   A fluororesin joined body obtained by joining fluororesin molded bodies by ultrasonic welding, wherein the fluororesin is joined by the joining method according to claim 1, claim 2, or claim 3. Joined body. 前記フッ素樹脂接合体が、燃料電池用パイプであることを特徴とする請求項４記載のフッ素樹脂接合体。   The said fluororesin joined body is a pipe for fuel cells, The fluororesin joined body of Claim 4 characterized by the above-mentioned.
JP2004328062A 2004-11-11 2004-11-11 Method for joining fluorocarbon resin molding and fluorocarbon resin joined body Pending JP2006137069A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008079366A1 (en) * 2006-12-22 2008-07-03 E.I. Du Pont De Nemours And Company Production process for parts of a perfluoropolymer composition
JP6275921B1 (en) * 2016-08-23 2018-02-07 朝日インテック株式会社 Junction structure and catheter having the junction structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008079366A1 (en) * 2006-12-22 2008-07-03 E.I. Du Pont De Nemours And Company Production process for parts of a perfluoropolymer composition
JP6275921B1 (en) * 2016-08-23 2018-02-07 朝日インテック株式会社 Junction structure and catheter having the junction structure

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