JP5470059B2 - 樹脂部材のレーザー接合方法 - Google Patents
樹脂部材のレーザー接合方法 Download PDFInfo
- Publication number
- JP5470059B2 JP5470059B2 JP2010007196A JP2010007196A JP5470059B2 JP 5470059 B2 JP5470059 B2 JP 5470059B2 JP 2010007196 A JP2010007196 A JP 2010007196A JP 2010007196 A JP2010007196 A JP 2010007196A JP 5470059 B2 JP5470059 B2 JP 5470059B2
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- Prior art keywords
- laser
- resin
- light
- laser beam
- resin member
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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
- B29C65/14—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
- B29C65/168—Laser beams making use of an absorber or impact modifier placed at the interface
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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
- B29C65/14—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- 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
- B29C65/1641—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 making use of a reflector on the opposite side, e.g. a polished mandrel or a mirror
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- 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
- B29C65/1645—Laser beams characterised by the way of heating the interface heating both sides of the joint, e.g. by using two lasers or a split beam
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C65/1683—Laser beams making use of an absorber or impact modifier coated on the article
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- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
- B29C65/5042—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like covering both elements to be joined
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C66/01—General aspects dealing with the joint area or with the area to be joined
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C66/114—Single butt joints
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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- B29C66/43—Joining a relatively small portion of the surface of said articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- 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
- B29C66/45—Joining of substantially the whole surface of the articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29C66/80—General aspects of machine operations or constructions and parts thereof
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- B29C66/8126—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
- B29C66/81266—Optical properties, e.g. transparency, reflectivity
- B29C66/81267—Transparent to electromagnetic radiation, e.g. to visible light
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
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Description
図1は、本発明の第一実施形態に係る樹脂部材の接合方法を示す側面図であり、符号10a、10bがシート状の樹脂部材を表しており、符合50がレーザー光を表している。
ただし、レーザー光の照射側に配置される樹脂部材については、樹脂部材全体として30%以上の光透過率を有することが好ましく、50%以上の光透過率を有することが更に好ましい。
該光吸収剤層20による光吸収性としては、20%以上が好ましく、30%以上がより好ましい。また、上限は80%とすることが好ましい。光吸収剤層の塗布巾はレーザー照射領域に合せて適宜最適化することができる。
該レーザー光反射部材としては、例えば図1に示すように、ガラス板30aの表面に、金属層又は誘電体多膜層30bが形成された鏡が好適である。
前記金属層としては、アルミニウムや銀、白金などの金属や、これらの合金からなる層を挙げることができる。また、前記誘電体多膜層としては、例えば酸化ケイ素と酸化チタンとを交互に蒸着することにより形成された誘電体多層膜を挙げることができ、該誘電体多層膜は、真空蒸着やスパッタリングなどによって形成することができる。
これらの内でも、安価で且つ面内均一な強度のレーザー光が得られ易い点においては、半導体レーザーやファイバーレーザーが好ましい。
また、レーザーの出力、パワー密度、スポットサイズ、照射回数、走査速度などは、樹脂材料の種類、厚み、光吸収率などから適宜選択され得る。
また、ステージから反射したレーザー光の利用促進が図られるため、光吸収剤層の塗布層を厚くする必要がなくなり、樹脂部材に対する光吸収剤の量を相対的に減らすことができ、樹脂部材の溶融による相溶も妨げられにくいという利点がある。さらに、光吸収剤層の形成に要するコストを低下させることができる。
実施例1において用いた使用材料は以下の通りである。
<使用材料>
・ステージ シリコンラバー(3mm厚)上にミラー(ガラス板の一面に金属層が形成されたもの、光反射率92%、光透過率0%)を積置したもの
・樹脂部材1 材質 トリアセチルセルロース(富士フィルム社製)
厚み 80μm
形状 50mm×50mm
・樹脂部材2 樹脂部材1と同じ
・光吸収剤 米国ジェンテックス(Gentex)社製、商品名「Clearweld」
・レーザー 波長 940nm
出力 6.2W
スポット 2mmφ
・加圧部材 材質 溶融石英ガラス(厚み10mm)にシリコンラバー(1mm厚)を積層したもの(シリコンラバー側にて樹脂部材を加圧)
樹脂部材2の端部に幅5mm×長さ50mmの範囲で光吸収剤を塗布して乾燥させ、光吸収剤の塗布層を形成した。この光吸収剤の塗布層は、波長940nmのレーザー光に対する透過率が40%であった。樹脂部材1をステージ上に載置し、光吸収剤の塗布層が該樹脂部材1と接するように樹脂部材2を重ね合わせ、その上から加圧部材で50kgf/cm2の圧力で押圧した。該加圧部材を押圧した状態で、上記条件のレーザー光を速度100mm/sで1ライン走査照射し、樹脂部材のレーザー接合を行った。その結果、得られた接合体をステージから取り出して簡易的に引っ張り、剥離評価を行ったところ、樹脂部材どうしが良好に溶融接合されており、上記照射条件がレーザーによる溶融しきい値であることも確認された。
<使用材料>
レーザー光の出力を7.8W、走査速度を70mm/sとすることを除き、他は実施例1と同様にしてレーザー接合テストを実施した。
下記ステージを用いたことを除き、他は実施例1と同様にしてレーザー接合テストを実施した。
・ステージ シリコンラバー(3mm厚、光反射率33%)上にポリイミド樹脂(デュポン社製、商品名「カプトン」25μm厚)を積層したもの
下記ステージを用いたことを除き、他は実施例2と同様にしてレーザー接合テストを実施した。
・ステージ シリコンラバー(3mm厚、光反射率33%)上にポリイミド樹脂(デュポン社製、商品名「カプトン」25μm厚)を積層したもの
20 光吸収剤層
30 レーザー光反射部材
31 ステージ
40 加圧部材
50 照射するレーザー光
50’ 反射したレーザー光
Claims (3)
- ステージ上に2以上の樹脂部材を載置し、該樹脂部材を光吸収剤層を介して接触させ、その接触面に対してステージと対向する方向からレーザー光を照射して樹脂部材を溶着させ、該樹脂部材を接合する樹脂部材のレーザー接合方法であって、
前記ステージが、前記レーザー光に対して70%以上の光反射率を有するレーザー光反射部材を備えて構成されており、
前記レーザー光を前記樹脂部材に対して走査しながら照射するとともに、前記レーザー光を、該走査方向に沿って傾斜させることを特徴とする樹脂部材のレーザー接合方法。 - 前記レーザー光反射部材が、ガラス板の表面に、金属層又は誘電体多膜層が形成されてなる鏡であることを特徴とする請求項1記載の樹脂部材のレーザー接合方法。
- 前記レーザー光反射部材に対するレーザー光の入射角が0.5°以上となるように、前記レーザー光の照射角度を前記ステージに対して傾斜させることを特徴とする請求項1又は2に記載の樹脂部材のレーザー接合方法。
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