JP2004148800A - Laser welding material and laser welding method - Google Patents

Laser welding material and laser welding method Download PDF

Info

Publication number
JP2004148800A
JP2004148800A JP2003198425A JP2003198425A JP2004148800A JP 2004148800 A JP2004148800 A JP 2004148800A JP 2003198425 A JP2003198425 A JP 2003198425A JP 2003198425 A JP2003198425 A JP 2003198425A JP 2004148800 A JP2004148800 A JP 2004148800A
Authority
JP
Japan
Prior art keywords
resin member
resin
laser
laser welding
laser beam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2003198425A
Other languages
Japanese (ja)
Inventor
Tsutomu Katayama
勉 片山
Koji Fukui
康治 福井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ube Corp
Original Assignee
Ube Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ube Industries Ltd filed Critical Ube Industries Ltd
Priority to JP2003198425A priority Critical patent/JP2004148800A/en
Publication of JP2004148800A publication Critical patent/JP2004148800A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1677—Laser beams making use of an absorber or impact modifier
    • 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
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said 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
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
    • B29C65/1606—Ultraviolet [UV] radiation, e.g. by ultraviolet excimer lasers
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
    • B29C65/1612—Infrared [IR] radiation, e.g. by infrared lasers
    • B29C65/1616—Near infrared radiation [NIR], e.g. by YAG lasers
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1654—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined
    • 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
    • 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
    • B29C66/72—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 structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B29C66/7212—Fibre-reinforced materials characterised by the composition of the fibres
    • 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
    • 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
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • 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
    • B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0085—Copolymers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Toxicology (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laser welding material and a laser welding method allowing firm joining of resin members in joining them by laser welding. <P>SOLUTION: A laser welding material wherein a first resin member and a second resin member are joined by lapping and irradiated with a laser beam from the first resin member side, which is characterized in that the first resin member is slightly laser beam absorbent while the second resin member is laser beam absorbent. When irradiated by the laser beam, the slightly absorbent first resin member generates heat by absorbing energy and the temperature at its joint surface with the second resin member rises to some extent. The second resin member is heated to melt by absorbing the laser beam under this state, which makes the first resin member melt easier, and the both resin members get mutually entangled enough at their joint section to enhance the joining. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、レーザー光を照射して樹脂部材を溶着させるレーザー溶着用材料及びレーザー溶着方法に関する。
【０００２】
【従来の技術】
従来、樹脂部材同士を接合する方法として、接着剤を用いる方法、熱板溶着、振動溶着、超音波溶着、スピン溶着等の溶着方法、最近ではＤＲＩ、ＤＳＩ等の射出溶着方法やレーザー溶着方法が知られている。
【０００３】
接着剤による接合方法は、作業者の手作業によるものであるため、非効率的な作業となる。また、安定的な接合強度を得ることができず、樹脂部材の種類によっては十分な接着力が得られないという問題がある。さらに、環境汚染の問題もある。
熱板溶着はサイクルが長く、充填物があったり、吸水状態では溶着できないとい欠点がある。振動溶着は振動により溶着部が１〜２ｍｍ動くため精密部品には適さない、バリが発生してフィルター等の目詰まりの原因になる、そりがあると溶着しにくい等の欠点がある。超音波溶着は溶着強度が低い、気密性に乏しい、小さいものしか適応できない等の欠点がある。スピン溶着は円形のものしか適用できず、充填物があったり、吸水状態では溶着できないとい欠点がある。
また、最近インテークマニホールドで採用されている射出溶着方法の１つであるＤＲＩ、ＤＳＩは溶着強度は高いが、金型代が高く、成形機の改造が必要であり、材料の流動性が特に良くないと使用できない等の欠点がある。
【０００４】
一方、レーザー溶着は、レーザー光に対して非吸収性の樹脂部材と、レーザー光に対して吸収性の樹脂部材とを当接させて溶着させる溶着方法である。これは、非吸収性の樹脂部材側からレーザー光を接合面に照射して、接合面を形成する吸収性を示す樹脂部材をレーザー光のエネルギーで溶融させ接合する方法である（例えば、特許文献１、特許文献２参照）。
しかしながら、このレーザー溶着方法では、接合される樹脂部材として、レーザー光に対して吸収性を有するものと吸収性を有さないものの２種類を用いているため、接合面において、レーザー光に対して吸収性を有さない樹脂部材が十分に溶融せず、接合力が弱かったり、不均一となるという問題を有していた。
【０００５】
【特許文献１】
特開昭６０−２１４９３１号公報
【特許文献２】
特公平５−４２３３６号公報
【０００６】
【発明が解決しようとする課題】
本発明は、上記実状を鑑みてなされたものであり、レーザー溶着方法による樹脂部材の接合において樹脂部材同士を強固に接合させることができるレーザー溶着用材料及びレーザー溶着方法を提供することを課題とする。
【０００７】
【課題を解決する手段】
上記課題を解決するために本発明者等は、第一樹脂部材と第二樹脂部材を強固に接合できるレーザー光を用いた接合方法について検討を重ねた結果、レーザー光を照射する側の第一樹脂部材として、レーザー光に対して弱吸収性の樹脂部材を使用することにより、両者を強固に接合できることを見出した。
【０００８】
すなわち、本発明は、第一樹脂部材と第二樹脂部材とを重ね合わせ、該第一樹脂部材側からレーザー光を照射して両者をレーザー溶着するためのレーザー溶着用材料であって、レーザー光に対して弱吸収性である第一樹脂部材と、レーザー光に対して吸収性である第二樹脂部材からなることを特徴とするレーザー溶着用材料に関するものである。
また、本発明は、第一樹脂部材と第二樹脂部材とを重ね合わせ、該第一樹脂部材側からレーザー光を照射して両者をレーザー溶着するレーザー溶着方法において、第一樹脂部材がレーザー光に対して弱吸収性であり、第二樹脂部材がレーザー光に対して吸収性であることを特徴とする樹脂部材のレーザー溶着方法に関するものである。
【０００９】
本発明のレーザー溶着用材料は、第一樹脂部材がレーザー光に対して弱吸収性であるため、第一樹脂部材にレーザー光を照射すると、エネルギーを吸収して、発熱し、第二樹脂部材との接合面部分の温度がある程度まで高くなる。この状態で、第二樹脂部材がレーザー光を吸収して加熱されることにより、溶融すると、第一樹脂部材も容易に溶融するため、接合部において樹脂部材同士が十分に互いに絡み合った接合部となり、接合力が強くなる。
【００１０】
【発明の実施の形態】
本発明のレーザー溶着用材料は、レーザー光に対して弱吸収性の第一樹脂部材と、レーザー光に対して吸収性の第二樹脂部材とからなる。
【００１１】
第一樹脂部材は、第一樹脂と第一樹脂に分散したレーザー光に対して弱吸収性の添加剤とからなる。
第一樹脂部材を形成する第一樹脂としては、レーザー光に対して十分な吸収性を示さない樹脂であればどのような種類の樹脂を用いてもよい。たとえば、ポリアミド、ポリプロピレン、スチレン−アクリロニトリル共重合体をあげることができる。また、必要に応じて、ガラス繊維やカーボン繊維等の補強繊維を添加したものを用いてもよい。
【００１２】
ここで、十分な吸収性とは、レーザー光を受けた部分がレーザー光を吸収し、その部分が溶融するような吸収性をいう。したがって、十分な吸収性を示さないとは、たとえばわずかなレーザー光の吸収があっても、大部分が透過し、その部分の樹脂が溶融しない吸収性をいう。
【００１３】
第一樹脂として用いられるポリアミドは、ジアミンと二塩基酸とからなるか、またはラクタムもしくはアミノカルボン酸からなるか、またはこれらの２種以上の共重合体からなるものが挙げられる。
【００１４】
ジアミンとしては、テトラメチレンジアミン、ヘキサメチレンジアミン、オクタメチレンジアミン、ノナメチレジアミン、ウンデカメチレンジアミン、ドデカメチレンジアミン等の脂肪族ジアミンや、メタキシリレンジアミン等の芳香族・環状構造を有するジアミンが挙げられる。
ジカルボン酸としては、アジピン酸、ヘプタンジカルボン酸、オクタンジカルボン酸、ノナンジカルボン酸、ウンデカンジカルボン酸、ドデカンジカルボン酸等の脂肪族ジアミンやテレフタル酸、イソフタル酸等の芳香族・環状構造を有するジカルボン酸が挙げられる。
【００１５】
ラクタムとしては、炭素数６〜１２のラクタム類であり、また、アミノカルボン酸としては炭素数６〜１２のアミノカルボン酸である。６―アミノカプロン酸、７―アミノヘプタン酸、１１―アミノウンデカン酸、１２―アミノドデカン酸、α―ピロリドン、ε―カプロラクタム、ω−ラウロラクタム、ε―エナントラクタム等が挙げられる。
【００１６】
第一樹脂部材に含有されるレーザー光に対して弱吸収性の添加剤としては、レーザー光の波長に共振して、レーザー光の一部を吸収し、一部を透過する材料であればよい。特にレーザー光に対して４０〜９０％の透過率を有するものが好ましい。なお、前記レーザー光に対する透過率は、弱吸収性の添加剤をＡＳＴＭ１号ダンベルの形状に成形したものについて測定した数値である。
【００１７】
また、弱吸収性の添加剤の含有量は、第一樹脂部材に対し、好ましくは、０．１〜５０重量％、さらに好ましくは、０．１〜３０重量％、特に好ましくは、０．１〜５重量％である。含有量が０．１重量％よりも少ないと、レーザー光のエネルギーを吸収することによる発熱が少ないため、第一樹脂部材の温度が十分にあがらず、接合部の接合強度が低くなる。また、含有量が５０重量％を超えると、曲げ弾性率等の物性が低下したり、十分な溶着強度を得るためにより多くのレーザー光のエネルギーが必要になるので好ましくない。
【００１８】
弱吸収性の添加剤としては、例えば、エチレン及び／又はプロピレンと他のオレフィン類やビニル系化合物との共重合体（以下、エチレン及び／又はプロピレン系共重合体という）、スチレンと、共役ジエン化合物との共重合体を水素添加してなるブロック共重合体（以下、スチレン系共重合体という）、かかるエチレン及び／又はプロピレン系共重合体、スチレン系共重合体にα，β−不飽和カルボン酸もしくはその誘導体を付加させた変性エチレン及び／又はプロピレン系共重合体、変性スチレン系共重合体が挙げられる。
【００１９】
エチレン及び／又はプロピレン系共重合体としては、（エチレン及び／又はプロピレン）・α−オレフィン系共重合体、（エチレン及び／又はプロピレン）・α，β−不飽和カルボン酸共重合体、（エチレン及び／又はプロピレン）・α，β−不飽和カルボン酸エステル系共重合体、アイオノマーなどを挙げることができる。
【００２０】
（エチレン及び／又はプロピレン）・α−オレフィン系共重合体とは、エチレン及び／又はプロピレンと炭素数３以上のα−オレフィンを共重合した重合体であり、炭素数３以上のα−オレフィンとしては、プロピレン、ブテン−１、ヘキセン−１、デセン−１、４−メチルブテン−１、４−メチルペンテン−１が挙げられる。
【００２１】
（エチレン及び／又はプロピレン）・α，β−不飽和カルボン酸系共重合体とは、エチレン及び／又はプロピレンとα，β−不飽和カルボン酸単量体を共重合した重合体であり、α，β−不飽和カルボン酸単量体としては、アクリル酸、メタクリル酸、エタクリル酸、無水マレイン酸等を挙げることができる。
【００２２】
（エチレン及び／又はプロピレン）・α，β−不飽和カルボン酸エステル系共重合体とは、エチレン及び／又はプロピレンとα，β−不飽和カルボン酸エステル単量体を共重合した重合体であり、α，β−不飽和カルボン酸エステル単量体としては、アクリル酸メチル、アクリル酸エチル、アクリル酸プロピル、アクリル酸ブチルなどのアクリル酸エステル、メタクリル酸メチル、メタクリル酸エチル、メタクリル酸プロピル、メタクリル酸ブチルなどのメタクリル酸エステル等を挙げられる。
【００２３】
アイオノマーとは、オレフィンとα，β−不飽和カルボン酸共重合体のカルボキシル基の少なくとも一部が金属イオンの中和によりイオン化されたものである。オレフィンとしてはエチレンが好ましく用いられ、α，β−不飽和カルボン酸としてはアクリル酸、メタクリル酸等が用いられる。金属イオンはナトリウム、カリウム、マグネシウム、カルシウム、亜鉛等のイオンを挙げることできる。
【００２４】
スチレン系共重合体とは、少なくとも１個、好ましくは２個以上のスチレンを主体とする重合体ブロックＡと、少なくとも１個の共役ジエン化合物を主体とする重合体ブロックＢとからなるブロック共重合体を水素添加してなるブロック共重合体であり、例えばＡ−Ｂ−Ａ、Ｂ−Ａ−Ｂ−Ａ、Ａ−Ｂ−Ａ−Ｂ−Ａ、Ｂ−Ａ−Ｂ−Ａ−Ｂ等の構造を有する。
【００２５】
共役ジエン化合物としては、例えばブタジエン、イソプレン、１，３−ペンタジエン、２，３−ジメチル−１，３−ブタジエンなどが挙げられる。
スチレン系共重合体としては、水添スチレン−ブタジエン−スチレン共重合体（ＳＥＢＳ）、水添スチレン−イソプレン−スチレン共重合体（ＳＥＰＳ）等が挙げられる。
【００２６】
変性（エチレン及び／又はプロピレン）系共重合体、変性スチレン系共重合体は、前記に規定した（エチレン及び／又はプロピレン）系共重合体、スチレン系共重合体にα，β−不飽和カルボン酸基またはその誘導体基を含有する化合物を溶液状態もしくは溶融状態において付加することによって得られる。これら変性（エチレン及び／又はプロピレン）系共重合体、変性スチレン系共重合体の製造方法としては、例えば押出機中で、ラジカル開始剤存在下、（エチレン及び／又はプロピレン）系共重合体、スチレン系共重合体とカルボン酸基またはその誘導体基を含有する化合物とを反応させる方法がある。
【００２７】
α，β−不飽和カルボン酸またはその誘導体（以下単に不飽和カルボン酸という）としては、アクリル酸，メタクリル酸，エタクリル酸，マレイン酸，フマル酸あるいはこれらの酸の無水物またはエステルなどを挙げることができる。
【００２８】
第一樹脂には、レーザー光に対して非吸収性の着色着色材を添加してもよい。例えば、アンスラキノン系染料、ペリレン系、ペリノン系、複素環系、ジスアゾ系、モノアゾ系等の有機系染料をあげることができる。また、これらの染料を混合させて用いてもよい。
また、第一樹脂には、ガラス、シリカ、タルク、炭酸カルシウム等の無機または有機物よりなるフィラー、耐熱剤、耐候剤、結晶核剤、結晶化促進剤、離型剤、滑剤、帯電防止剤、難燃剤、難燃助剤等の機能性付与剤を添加してもよい。
【００２９】
第二樹脂部材は、第二樹脂と第二樹脂に分散したレーザー光に対して吸収性の添加剤とからなる。
このため、レーザー光が照射されたとき、レーザー光が吸収され、第二樹脂部材を溶融する。すなわち、本発明のレーザー溶着方法においては、第一樹脂部材を透過したレーザー光を吸収し、第二樹脂部材自身および当接する第一樹脂部材を溶融させ、接合する。
【００３０】
第二樹脂部材を形成する第二樹脂としては、レーザー光に対して十分な吸収性を示す樹脂であればどのような種類の樹脂を用いてもよい。たとえば、ポリアミド、ポリプロピレン、スチレン−アクリロニトリル共重合体等の樹脂や、これらの樹脂をガラス繊維、カーボン繊維で強化した樹脂等をあげることができる。
【００３１】
また、上記以外の成分、たとえば、ガラス、シリカ、タルク、炭酸カルシウム等の無機または有機物よりなるフィラー、耐熱剤、耐候剤、結晶核剤、結晶化促進剤、離型剤、滑剤、帯電防止剤、難燃剤、難燃助剤等の機能性付与剤を添加してもよい。
【００３２】
第二樹脂部材におけるレーザー光に対して吸収性を有する添加剤としては、カーボンブラック、複合酸化物系顔料等の無機系着色材、フタロシアニン系顔料、ポリメチン系顔料等の有機系着色材が用いられる。
【００３３】
第二樹脂部材は、照射されるレーザー光に対して５％以下の透過率を有することが好ましい。透過率が５％を超えて大きくなると、照射されたレーザー光が透過することにより第二樹脂部材に吸収されるレーザー光のエネルギーが減少するとともに、レーザー光のエネルギーのロスが生じるようになるためである。
【００３４】
また、本発明のレーザー溶着方法においては、上記第一樹脂部材と第二樹脂部材とを重ね合わせ、この重ね合わせ部に第一樹脂部材側からレーザー光を照射して両者をレーザー溶着する。
第一樹脂部材側からレーザー光を照射することで、レーザー光に対して弱吸収性の第一樹脂部をレーザー光が透過する。透過したレーザー光は、第二樹脂部材表面に到達し、エネルギーとして蓄積される。この蓄積されたエネルギ分布は、レーザー光があらかじめ持っていたエネルギー分布に対して第一樹脂部材の透過の際の散乱によって、不均一なエネルギー分布となる。そして、接合面においては、不均一なエネルギー分布を持った加熱、溶融が行われるため、第一樹脂部材および第二樹脂部材が互いに絡み合った状態の接合部が生じ、得られる接合体の接合部が強固になる。
【００３５】
さらに、第一樹脂部材及び第二樹脂部材を同色の着色剤で着色することにより、同色同士の樹脂を接合することができるようになり、接合された樹脂部材の見た目をよくすることができる。
【００３６】
レーザー溶着に用いられるレーザー光としては、ガラス：ネオジム３＋レーザー、ＹＡＧ：ネオジム３＋レーザー、ルビーレーザー、ヘリウム−ネオンレーザー、クリプトンレーザー、アルゴンレーザー、Ｈ２レーザー、Ｎ２レーザー、半導体レーザー等のレーザー光をあげることができる。より好ましいレーザーとしては、半導体レーザーである。
【００３７】
レーザー光の波長は、接合される樹脂材料により異なるため一概に決定できないが、４００ｎｍ以上であることが好ましい。波長が４００ｎｍより短いと、樹脂が著しく劣化する。
【００３８】
また、レーザー光の出力は、走査速度と第一樹脂部材の吸収能力により調整できる。レーザー光の出力が低いと樹脂材料の接合面を互いに溶融させることが困難となり、出力が高いと樹脂材料が蒸発したり、変質し強度が低下する問題が生じるようになる。
【００３９】
【実施例】
以下、実施例を用いて本発明を説明する。
［実施例で使用した材料］
ＰＡ６：ポリアミド６（宇部興産社製 １０１５Ｂ）
ｍ−ＥＰＲ：変性エチレン・α−オレフィン系共重合体（三井化学社製 タフマーＭＣ１３０７）；レーザー光透過率８０％
［レーザー光透過率の測定］
パワーエネルギーアナライザー（コヒレント・ジャパン社製 ＦｉｅｌｄＭａｓｔｅｒ（登録商標）ＧＳ ＬＭ−４５）を用いて、ＡＳＴＭ１号ダンベルの形状に成形したものについて測定した。
【００４０】
実施例１〜４及び比較例１
第一樹脂部材として、ＰＡ６とｍ−ＥＰＲを表１に記載の割合で混練した樹脂組成物を、ＡＳＴＭ１号ダンベルの形状に成形することにより作製した。
第二樹脂部材として、ＰＡ６にカーボンブラックを０．３重量％配合した樹脂組成物を、ＡＳＴＭ１号ダンベルの形状に成形することにより作製した。
次に、第一樹脂部材と第二樹脂部材の先端部を重ね合わせた状態で、半導体レーザー装置にセットした。第一樹脂部材からレーザー光を照射して両者を溶着した。
このとき、レーザー溶着に用いられたレーザー光は、波長が９４０ｎｍであり、表１に記載の出力で照射した。
【００４１】
【表１】

Figure 2004148800
【００４２】
【発明の効果】
本発明におけるレーザー溶着用材料は、透過材である第一樹脂部材としてレーザー光に対して弱吸収性のものを用いることにより、レーザー光を照射すると、第一樹脂部材はエネルギーを吸収して、発熱し、第二樹脂部材との接合面部分の温度がある程度まで高くなる。この状態で、第二樹脂部材がレーザー光を吸収して加熱されることにより、溶融すると、第一樹脂部材も容易に溶融するため、接合部において樹脂部材同士が十分に互いに絡み合った接合部となり、接合力が強くなる。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a laser welding material and a laser welding method for welding a resin member by irradiating a laser beam.
[0002]
[Prior art]
Conventionally, as a method for joining resin members, a method using an adhesive, a welding method such as hot plate welding, vibration welding, ultrasonic welding, and spin welding, recently, an injection welding method such as DRI and DSI, and a laser welding method are used. Are known.
[0003]
The joining method using an adhesive is an inefficient operation because it is performed manually by an operator. In addition, there is a problem that stable bonding strength cannot be obtained, and sufficient adhesive strength cannot be obtained depending on the type of the resin member. In addition, there is a problem of environmental pollution.
The hot plate welding has a drawback that the cycle is long, there is a filling, and welding cannot be performed in a water absorbing state. Vibration welding is disadvantageous in that it is not suitable for precision parts because the welded portion moves by 1 to 2 mm due to vibration, causes burrs to cause clogging of filters and the like, and warpage makes welding difficult. Ultrasonic welding has disadvantages such as low welding strength, poor airtightness, and the ability to apply only small ones. Spin welding is applicable only to circular ones, and has the disadvantage that it cannot be welded in the presence of a filler or in a water-absorbed state.
In addition, DRI and DSI, which are one of the injection welding methods recently used in intake manifolds, have high welding strength, but require a high mold cost, require modification of a molding machine, and have particularly good fluidity of the material. There is a drawback that it cannot be used without it.
[0004]
On the other hand, laser welding is a welding method in which a resin member that does not absorb laser light and a resin member that absorbs laser light are brought into contact with each other and welded. This is a method in which a joining surface is irradiated with a laser beam from a non-absorbing resin member side, and the absorbing resin member forming the joining surface is melted with laser light energy and joined. 1, see Patent Document 2).
However, in this laser welding method, two types of resin members to be joined are used, one having absorptivity to laser light and the other having no absorptivity to laser light. There has been a problem that the resin member having no absorptivity does not melt sufficiently, and the bonding strength is weak or non-uniform.
[0005]
[Patent Document 1]
JP-A-60-214931 [Patent Document 2]
Japanese Patent Publication No. 5-42336
[Problems to be solved by the invention]
The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a laser welding material and a laser welding method capable of firmly joining resin members to each other in joining resin members by a laser welding method. I do.
[0007]
[Means to solve the problem]
In order to solve the above-described problems, the present inventors have repeatedly studied a bonding method using a laser beam capable of firmly bonding the first resin member and the second resin member, and as a result, the first side of the laser beam irradiation side has It has been found that by using a resin member that absorbs a laser beam weakly as the resin member, both can be firmly joined.
[0008]
That is, the present invention is a laser welding material for superimposing a first resin member and a second resin member, irradiating a laser beam from the first resin member side and laser welding the both, And a second resin member that absorbs laser light.
Further, the present invention provides a laser welding method in which a first resin member and a second resin member are overlapped with each other, and a laser beam is irradiated from the first resin member side to perform laser welding on the first resin member. And a second resin member that absorbs laser light.
[0009]
The laser welding material of the present invention, since the first resin member is weakly absorbing laser light, when the first resin member is irradiated with laser light, it absorbs energy, generates heat, and generates the second resin member. The temperature of the joint surface portion with the substrate increases to some extent. In this state, when the second resin member is heated by absorbing the laser beam and is melted, the first resin member is also easily melted, so that the joining portion becomes a joint where the resin members are sufficiently entangled with each other. , The bonding strength is increased.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
The laser welding material of the present invention includes a first resin member that absorbs a laser beam weakly and a second resin member that absorbs a laser beam.
[0011]
The first resin member includes a first resin and an additive that is weakly absorbing laser light dispersed in the first resin.
As the first resin forming the first resin member, any type of resin may be used as long as the resin does not exhibit a sufficient absorptivity to laser light. For example, polyamide, polypropylene, and styrene-acrylonitrile copolymer can be used. If necessary, a fiber to which reinforcing fibers such as glass fiber and carbon fiber are added may be used.
[0012]
Here, “sufficient absorbency” refers to absorbency such that a portion that has received laser light absorbs the laser light and the portion melts. Therefore, "not exhibiting sufficient absorptivity" means, for example, an absorptivity in which even if a small amount of laser light is absorbed, most of the light is transmitted and the resin in that portion is not melted.
[0013]
Examples of the polyamide used as the first resin include those composed of a diamine and a dibasic acid, those composed of a lactam or an aminocarboxylic acid, or those composed of a copolymer of two or more of these.
[0014]
Examples of the diamine include aliphatic diamines such as tetramethylene diamine, hexamethylene diamine, octamethylene diamine, nonamethylenediamine, undecamethylene diamine, and dodecamethylene diamine, and diamines having an aromatic / cyclic structure such as meta-xylylene diamine. No.
Examples of the dicarboxylic acid include adipic acid, heptane dicarboxylic acid, octane dicarboxylic acid, nonane dicarboxylic acid, undecane dicarboxylic acid, aliphatic diamines such as dodecane dicarboxylic acid, and terephthalic acid, and dicarboxylic acids having an aromatic / cyclic structure such as isophthalic acid. No.
[0015]
The lactam is a lactam having 6 to 12 carbon atoms, and the aminocarboxylic acid is an aminocarboxylic acid having 6 to 12 carbon atoms. 6-aminocaproic acid, 7-aminoheptanoic acid, 11-aminoundecanoic acid, 12-aminododecanoic acid, α-pyrrolidone, ε-caprolactam, ω-laurolactam, ε-enantholactam and the like.
[0016]
The additive weakly absorbing the laser light contained in the first resin member may be any material that resonates with the wavelength of the laser light, absorbs a part of the laser light, and partially transmits the laser light. . In particular, those having a transmittance of 40 to 90% with respect to laser light are preferable. In addition, the transmittance | permeability with respect to the said laser beam is the numerical value measured about what shape | molded the weakly absorbing additive in the shape of ASTM No. 1 dumbbell.
[0017]
The content of the weakly absorbent additive is preferably 0.1 to 50% by weight, more preferably 0.1 to 30% by weight, and particularly preferably 0.1 to 30% by weight, based on the first resin member. ~ 5% by weight. If the content is less than 0.1% by weight, the heat generated by absorbing the energy of the laser beam is small, so that the temperature of the first resin member does not rise sufficiently, and the bonding strength of the bonding portion decreases. On the other hand, if the content exceeds 50% by weight, physical properties such as flexural modulus are lowered and more laser light energy is required to obtain sufficient welding strength, which is not preferable.
[0018]
Examples of the weakly absorbing additive include copolymers of ethylene and / or propylene with other olefins and vinyl compounds (hereinafter referred to as ethylene and / or propylene copolymers), styrene, and conjugated diene. A block copolymer obtained by hydrogenating a copolymer with a compound (hereinafter referred to as a styrene-based copolymer); such an ethylene and / or propylene-based copolymer; Modified ethylene and / or propylene-based copolymers and styrene-based copolymers to which a carboxylic acid or a derivative thereof has been added.
[0019]
Examples of the ethylene and / or propylene copolymer include (ethylene and / or propylene) α-olefin copolymer, (ethylene and / or propylene) α, β-unsaturated carboxylic acid copolymer, and (ethylene And / or propylene) · α, β-unsaturated carboxylic acid ester-based copolymers, ionomers and the like.
[0020]
(Ethylene and / or propylene) · α-olefin-based copolymer is a polymer obtained by copolymerizing ethylene and / or propylene with an α-olefin having 3 or more carbon atoms. Examples include propylene, butene-1, hexene-1, decene-1, 4-methylbutene-1, and 4-methylpentene-1.
[0021]
(Ethylene and / or propylene) · α, β-unsaturated carboxylic acid copolymer is a polymer obtained by copolymerizing ethylene and / or propylene with an α, β-unsaturated carboxylic acid monomer. Examples of the α, β-unsaturated carboxylic acid monomer include acrylic acid, methacrylic acid, ethacrylic acid, and maleic anhydride.
[0022]
(Ethylene and / or propylene) · α, β-unsaturated carboxylic acid ester-based copolymer is a polymer obtained by copolymerizing ethylene and / or propylene with an α, β-unsaturated carboxylic acid ester monomer. And α, β-unsaturated carboxylic acid ester monomers include acrylates such as methyl acrylate, ethyl acrylate, propyl acrylate, and butyl acrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, and methacrylic acid. And methacrylates such as butyl acrylate.
[0023]
The ionomer is one in which at least a part of the carboxyl group of the olefin and the α, β-unsaturated carboxylic acid copolymer is ionized by neutralizing a metal ion. Ethylene is preferably used as the olefin, and acrylic acid, methacrylic acid or the like is used as the α, β-unsaturated carboxylic acid. Examples of metal ions include ions of sodium, potassium, magnesium, calcium, zinc and the like.
[0024]
The styrene-based copolymer is a block copolymer comprising at least one, preferably two or more, polymer blocks A mainly composed of styrene and at least one polymer block B mainly composed of a conjugated diene compound. It is a block copolymer obtained by hydrogenating a coalesced substance, for example, ABA, BABA, ABABA, BABAB, etc. Having a structure.
[0025]
Examples of the conjugated diene compound include butadiene, isoprene, 1,3-pentadiene, and 2,3-dimethyl-1,3-butadiene.
Examples of the styrene-based copolymer include hydrogenated styrene-butadiene-styrene copolymer (SEBS) and hydrogenated styrene-isoprene-styrene copolymer (SEPS).
[0026]
The modified (ethylene and / or propylene) -based copolymer and the modified styrene-based copolymer are the same as those defined above for the (ethylene and / or propylene) -based copolymer and the styrene-based copolymer. It can be obtained by adding a compound containing an acid group or a derivative thereof in a solution state or a molten state. Methods for producing these modified (ethylene and / or propylene) -based copolymers and modified styrene-based copolymers include, for example, in an extruder, in the presence of a radical initiator, a (ethylene and / or propylene) -based copolymer, There is a method of reacting a styrene-based copolymer with a compound containing a carboxylic acid group or a derivative thereof.
[0027]
Examples of the α, β-unsaturated carboxylic acid or its derivative (hereinafter simply referred to as unsaturated carboxylic acid) include acrylic acid, methacrylic acid, ethacrylic acid, maleic acid, fumaric acid, and anhydrides or esters of these acids. Can be.
[0028]
The first resin may be added with a coloring colorant that is non-absorbable to laser light. Examples include organic dyes such as anthraquinone dyes, perylene dyes, perinone dyes, heterocyclic dyes, disazo dyes, and monoazo dyes. Further, these dyes may be used as a mixture.
In addition, the first resin, glass, silica, talc, fillers made of inorganic or organic substances such as calcium carbonate, heat resistant agents, weathering agents, crystal nucleating agents, crystallization accelerators, release agents, lubricants, antistatic agents, Functionality-imparting agents such as a flame retardant and a flame retardant auxiliary may be added.
[0029]
The second resin member includes the second resin and an additive that absorbs laser light dispersed in the second resin.
Therefore, when the laser light is applied, the laser light is absorbed and the second resin member is melted. That is, in the laser welding method of the present invention, the laser light transmitted through the first resin member is absorbed, and the second resin member itself and the first resin member to be brought into contact are melted and joined.
[0030]
As the second resin forming the second resin member, any type of resin may be used as long as the resin has a sufficient absorptivity to laser light. For example, resins such as polyamide, polypropylene, and styrene-acrylonitrile copolymer, and resins obtained by reinforcing these resins with glass fibers and carbon fibers can be used.
[0031]
In addition, components other than the above, for example, fillers made of inorganic or organic substances such as glass, silica, talc, and calcium carbonate, heat-resistant agents, weathering agents, crystal nucleating agents, crystallization accelerators, release agents, lubricants, and antistatic agents And a function-imparting agent such as a flame retardant or a flame retardant auxiliary.
[0032]
As the additive having an absorptivity to laser light in the second resin member, carbon black, an inorganic coloring material such as a composite oxide pigment, an organic coloring material such as a phthalocyanine pigment and a polymethine pigment are used. .
[0033]
The second resin member preferably has a transmittance of 5% or less with respect to the irradiated laser beam. When the transmittance exceeds 5%, the energy of the laser light absorbed by the second resin member by transmitting the irradiated laser light decreases, and the energy of the laser light is lost. It is.
[0034]
Further, in the laser welding method of the present invention, the first resin member and the second resin member are overlapped, and the overlapped portion is irradiated with laser light from the first resin member side to perform laser welding on the two.
By irradiating the laser light from the first resin member side, the laser light is transmitted through the first resin portion that is weakly absorbing the laser light. The transmitted laser light reaches the surface of the second resin member and is stored as energy. The stored energy distribution becomes a non-uniform energy distribution due to scattering at the time of transmission through the first resin member with respect to the energy distribution previously held by the laser beam. Then, in the bonding surface, since heating and melting with non-uniform energy distribution are performed, a bonding portion in which the first resin member and the second resin member are entangled with each other is generated, and the bonding portion of the obtained bonding body is obtained. Becomes stronger.
[0035]
Furthermore, by coloring the first resin member and the second resin member with the same colorant, resins of the same color can be joined, and the appearance of the joined resin members can be improved.
[0036]
As the laser light used for laser welding, glass: neodymium 3+ laser, YAG: Nd 3+ laser, ruby laser, a helium - neon laser, krypton laser, argon laser, H 2 laser, N 2 laser, a laser light such as semiconductor laser Can be given. A more preferred laser is a semiconductor laser.
[0037]
The wavelength of the laser beam cannot be determined unconditionally because it differs depending on the resin material to be joined, but is preferably 400 nm or more. When the wavelength is shorter than 400 nm, the resin is significantly deteriorated.
[0038]
Further, the output of the laser beam can be adjusted by the scanning speed and the absorption capacity of the first resin member. If the output of the laser beam is low, it becomes difficult to melt the joining surfaces of the resin materials with each other, and if the output is high, the resin material evaporates or deteriorates, causing a problem that the strength is reduced.
[0039]
【Example】
Hereinafter, the present invention will be described using examples.
[Materials used in Examples]
PA6: Polyamide 6 (1015B manufactured by Ube Industries)
m-EPR: modified ethylene / α-olefin copolymer (Tuffmer MC1307 manufactured by Mitsui Chemicals, Inc.); laser light transmittance 80%
[Measurement of laser light transmittance]
Using a power energy analyzer (FieldMaster (registered trademark) GS LM-45, manufactured by Coherent Japan), measurement was performed on an ASTM No. 1 dumbbell.
[0040]
Examples 1 to 4 and Comparative Example 1
As a first resin member, a resin composition in which PA6 and m-EPR were kneaded at a ratio shown in Table 1 was formed into a shape of an ASTM No. 1 dumbbell.
As a second resin member, a resin composition in which 0.3% by weight of carbon black was mixed with PA6 was formed by molding into a shape of ASTM No. 1 dumbbell.
Next, the first resin member and the second resin member were set in a semiconductor laser device in a state where the tip portions were overlapped. Both were welded by irradiating a laser beam from the first resin member.
At this time, the laser beam used for laser welding had a wavelength of 940 nm and was irradiated with the output shown in Table 1.
[0041]
[Table 1]
Figure 2004148800
[0042]
【The invention's effect】
Laser welding material in the present invention, by using a weakly absorbing material for laser light as the first resin member as a transparent material, when irradiated with laser light, the first resin member absorbs energy, Heat is generated, and the temperature of the joint surface portion with the second resin member increases to some extent. In this state, when the second resin member is heated by absorbing the laser beam and is melted, the first resin member is also easily melted, so that the joining portion becomes a joint where the resin members are sufficiently entangled with each other. , The bonding strength is increased.

Claims (7)

第一樹脂部材と第二樹脂部材とを重ね合わせ、該第一樹脂部材側からレーザー光を照射して両者をレーザー溶着するためのレーザー溶着用材料であって、レーザー光に対して弱吸収性である第一樹脂部材と、レーザー光に対して吸収性である第二樹脂部材からなることを特徴とするレーザー溶着用材料。A laser welding material for laminating a first resin member and a second resin member and irradiating a laser beam from the first resin member side to weld the two to each other, and has a weak absorption property for the laser beam. And a second resin member that is absorptive to laser light. 該第一樹脂部材は第一樹脂と該第一樹脂に分散したレーザー光に対して弱吸収性の添加剤とからなり、該第二樹脂部材は第二樹脂と該第二樹脂に分散したレーザー光に対して吸収性の添加剤とからなることを特徴とする請求項１記載のレーザー溶着用材料。The first resin member is composed of a first resin and an additive that absorbs weakly to laser light dispersed in the first resin, and the second resin member is a laser dispersed in the second resin and the second resin. The laser welding material according to claim 1, comprising an additive that absorbs light. 第一樹脂及び第二樹脂がポリアミドである請求項２記載のレーザー溶着用材料。The laser welding material according to claim 2, wherein the first resin and the second resin are polyamide. 弱吸収性の添加剤が、レーザー光に対して４０〜９０％の透過率を有するものである請求項２記載のレーザー溶着用材料。The laser welding material according to claim 2, wherein the weakly absorbing additive has a transmittance of 40 to 90% with respect to a laser beam. 弱吸収性の添加剤が、エチレン及び／又はプロピレン系共重合体、スチレン系共重合体、変性エチレン及び／又はプロピレン系共重合体及び変性スチレン系共重合体の少なくとも一種であることを特徴とする請求項２記載のレーザー溶着用材料。The weakly absorbing additive is characterized in that it is at least one of an ethylene and / or propylene copolymer, a styrene copolymer, a modified ethylene and / or propylene copolymer, and a modified styrene copolymer. The laser welding material according to claim 2, wherein 弱吸収性の添加剤の含有量が、第一樹脂部材に対し、０．１〜５０重量％であることを特徴とする請求項２記載のレーザー溶着用材料。The laser welding material according to claim 2, wherein the content of the weakly absorbing additive is 0.1 to 50% by weight based on the first resin member. 第一樹脂部材と第二樹脂部材とを重ね合わせ、該第一樹脂部材側からレーザー光を照射して両者をレーザー溶着するレーザー溶着方法において、第一樹脂部材がレーザー光に対して弱吸収性であり、第二樹脂部材がレーザー光に対して吸収性であることを特徴とする樹脂部材のレーザー溶着方法。In a laser welding method in which a first resin member and a second resin member are overlapped with each other and a laser beam is irradiated from the first resin member side to perform laser welding, the first resin member has a weak absorption property with respect to the laser beam. Wherein the second resin member is absorptive to laser light.
JP2003198425A 2002-09-05 2003-07-17 Laser welding material and laser welding method Pending JP2004148800A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003198425A JP2004148800A (en) 2002-09-05 2003-07-17 Laser welding material and laser welding method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002259913 2002-09-05
JP2003198425A JP2004148800A (en) 2002-09-05 2003-07-17 Laser welding material and laser welding method

Publications (1)

Publication Number Publication Date
JP2004148800A true JP2004148800A (en) 2004-05-27

Family

ID=32472973

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003198425A Pending JP2004148800A (en) 2002-09-05 2003-07-17 Laser welding material and laser welding method

Country Status (1)

Country Link
JP (1) JP2004148800A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006009200A1 (en) * 2004-07-22 2006-01-26 Daicel Polymer, Ltd. Label for laser welding and composite molding
JP2008001112A (en) * 2005-09-21 2008-01-10 Orient Chem Ind Ltd Laser welded body
JP2008105430A (en) * 2005-09-21 2008-05-08 Orient Chem Ind Ltd Laser welded body
EP1935618A1 (en) * 2005-09-21 2008-06-25 Orient Chemical Industries, Ltd. Laser welded product
EP1944152A1 (en) 2007-01-11 2008-07-16 Sumitomo Metal Mining Co., Ltd. Light-absorbing resin composition for use in laser welding, light-absorbing resin molded article, and method for manufacturing light-absorbing resin molded article
CN101186739B (en) * 2006-11-22 2012-05-30 住友金属矿山株式会社 Light-absorbent resin composition for laser welding, light-absorbent resin molding, and method for manufacturing light-absorbent resin molding
WO2012104006A1 (en) 2011-02-03 2012-08-09 Merck Patent Gmbh Laser-markable and laser-weldable polymers
US8535472B2 (en) 2005-09-21 2013-09-17 Orient Chemical Industries, Ltd. Laser-welded article
JP2014014733A (en) * 2012-07-05 2014-01-30 Asahi Kasei Chemicals Corp Container and method for manufacturing the same
JP2018058318A (en) * 2016-10-07 2018-04-12 三井化学株式会社 Tape winding molding method, and fiber-reinforced resin composition for tape winding molding
WO2019160117A1 (en) 2018-02-16 2019-08-22 三井化学株式会社 Polyamide resin composition, molded body thereof, and method for manufacturing laser-welded body

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01203454A (en) * 1988-02-09 1989-08-16 Asahi Chem Ind Co Ltd Polymer blend composition
JPH09510930A (en) * 1994-03-31 1997-11-04 マルクアルト ゲーエムベーハー Plastic work piece and method of manufacturing the same
JP2002120293A (en) * 2000-10-13 2002-04-23 Toyota Motor Corp Method for producing resin molding

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01203454A (en) * 1988-02-09 1989-08-16 Asahi Chem Ind Co Ltd Polymer blend composition
JPH09510930A (en) * 1994-03-31 1997-11-04 マルクアルト ゲーエムベーハー Plastic work piece and method of manufacturing the same
JP2002120293A (en) * 2000-10-13 2002-04-23 Toyota Motor Corp Method for producing resin molding

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006009200A1 (en) * 2004-07-22 2006-01-26 Daicel Polymer, Ltd. Label for laser welding and composite molding
EP2407299A1 (en) * 2005-09-21 2012-01-18 Orient Chemical Industries, Ltd. Laser-welded article
USRE44045E1 (en) 2005-09-21 2013-03-05 Orient Chemical Industries, Ltd. Laser-welded article
EP1935618A1 (en) * 2005-09-21 2008-06-25 Orient Chemical Industries, Ltd. Laser welded product
EP1941988A1 (en) * 2005-09-21 2008-07-09 Orient Chemical Industries, Ltd. Laser welded material
EP2360008A1 (en) * 2005-09-21 2011-08-24 Orient Chemical Industries, Ltd. Laser-welded article
EP1941988A4 (en) * 2005-09-21 2009-02-25 Orient Chemical Ind Laser welded material
EP1935618A4 (en) * 2005-09-21 2009-02-25 Orient Chemical Ind Laser welded product
JP4574666B2 (en) * 2005-09-21 2010-11-04 オリヱント化学工業株式会社 Laser welded body
US7960012B2 (en) 2005-09-21 2011-06-14 Orient Chemical Industries, Ltd. Laser-welded article
US7960003B2 (en) 2005-09-21 2011-06-14 Orient Chemical Industries, Ltd. Laser-welded article
JP2008001112A (en) * 2005-09-21 2008-01-10 Orient Chem Ind Ltd Laser welded body
US8535472B2 (en) 2005-09-21 2013-09-17 Orient Chemical Industries, Ltd. Laser-welded article
USRE44290E1 (en) 2005-09-21 2013-06-11 Orient Chemical Industries, Ltd. Laser-welded article
JP2008105430A (en) * 2005-09-21 2008-05-08 Orient Chem Ind Ltd Laser welded body
CN101267933B (en) * 2005-09-21 2012-05-23 东方化学工业株式会社 Laser welded body
US8318051B2 (en) 2006-11-22 2012-11-27 Sumitomo Metal Mining Co., Ltd. Light-absorbent resin composition for laser welding, light-absorbent resin molding, and method for manufacturing light-absorbent resin molding
CN101186739B (en) * 2006-11-22 2012-05-30 住友金属矿山株式会社 Light-absorbent resin composition for laser welding, light-absorbent resin molding, and method for manufacturing light-absorbent resin molding
EP1944152A1 (en) 2007-01-11 2008-07-16 Sumitomo Metal Mining Co., Ltd. Light-absorbing resin composition for use in laser welding, light-absorbing resin molded article, and method for manufacturing light-absorbing resin molded article
WO2012104006A1 (en) 2011-02-03 2012-08-09 Merck Patent Gmbh Laser-markable and laser-weldable polymers
JP2014014733A (en) * 2012-07-05 2014-01-30 Asahi Kasei Chemicals Corp Container and method for manufacturing the same
JP2018058318A (en) * 2016-10-07 2018-04-12 三井化学株式会社 Tape winding molding method, and fiber-reinforced resin composition for tape winding molding
WO2019160117A1 (en) 2018-02-16 2019-08-22 三井化学株式会社 Polyamide resin composition, molded body thereof, and method for manufacturing laser-welded body
US11673341B2 (en) 2018-02-16 2023-06-13 Mitsui Chemicals, Inc. Polyamide resin composition, molded body thereof, and method for manufacturing laser-welded body
KR20200104411A (en) 2018-02-16 2020-09-03 미쯔이가가꾸가부시끼가이샤 Polyamide resin composition and its molded article, method for producing a laser welded article

Similar Documents

Publication Publication Date Title
JP4894761B2 (en) Laser welding material, laser welding method and molded product using the same
US8053523B2 (en) Hydrogen tank liner material and hydrogen tank liner
JP2004148800A (en) Laser welding material and laser welding method
EP1396334B1 (en) Laser welding material and laser welding method
JP4161823B2 (en) How to join pipe-shaped products
WO2006085659A1 (en) Laser weld of laser transmitting member containing alkaline earth metal salt of anthrapyridone acid dye
US7718271B2 (en) Material for laser welding and laser welding method
JP4453507B2 (en) Laser welding material and laser welding method
WO2004005013A1 (en) Method of joining pipe-shaped articles
US20050048290A1 (en) Methods for laser welding articles molded from polyolefins to those molded from other thermoplastic resins, and welded articles prepared therefrom
JP4274008B2 (en) Laser welding material and laser welding method
JP2002284895A (en) Resin molded article
JP4274009B2 (en) Laser welding material and laser welding method
JP2007210203A (en) Laser welding method and laser-welded resin member
US20080257489A1 (en) Method for laser welding
JP4161824B2 (en) How to join pipe-shaped products
JP4161825B2 (en) How to join pipe-shaped products
JP2007307913A (en) Joining method of pipe-shaped article
JP2003146332A (en) Multi-layered hollow container and manufacturing method therefor
JP2021151775A (en) Manufacturing method of hollow molded article that comes into contact with high-pressure hydrogen
JP2001301039A (en) Method for enhancing strength of resin molded article and laser welding method

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20050818

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20070621

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20070807

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20070911

RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20070911

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20090106