JP4870470B2 - Laser light transmissive member and method of manufacturing joined body - Google Patents
Laser light transmissive member and method of manufacturing joined body Download PDFInfo
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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
- 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
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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
- 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
- B29C66/733—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 optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence
- B29C66/7332—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 optical properties of the material of the parts to be joined, e.g. fluorescence, phosphorescence at least one of the parts to be joined being coloured
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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
- B29C65/1603—Laser beams characterised by the type of electromagnetic radiation
- B29C65/1606—Ultraviolet [UV] radiation, e.g. by ultraviolet excimer lasers
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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
- B29C65/1603—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
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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
- 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
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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
- 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
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- 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
- B29K2105/0005—Condition, form or state of moulded material or of the material to be shaped containing compounding ingredients
- B29K2105/0032—Pigments, colouring agents or opacifiyng agents
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- 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
- B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
- B29K2995/0026—Transparent
- B29K2995/0027—Transparent for light outside the visible spectrum
Abstract
Description
本発明は、レーザー光透過性着色樹脂組成物（以下単に「着色樹脂組成物」という場合がある）からなるレーザー光透過性部材、およびレーザー溶着による接合体の製造方法に関する。 The present invention relates to a laser light transmissive member made of a laser light transmissive colored resin composition (hereinafter sometimes simply referred to as “colored resin composition”) , and a method for producing a joined body by laser welding.
レーザー溶着方法は、レーザー光透過性樹脂部材（以下単に「透過性部材」という場合がある）とレーザー光吸収性樹脂部材（以下単に「吸収性部材」という場合がある）とを当接させて、レーザー光を透過性部材側から吸収性部材の面に照射し、上記当接部を加熱溶融させることにより両部材を溶着接合させる方法である（特許文献１）。この方法では透過性部材はレーザー光を十分に透過させ、吸収性部材はレーザー光を十分に吸収してレーザー光を熱に効率よく変換させることが要求されている。そのためには吸収性部材は通常青色〜黒色系の暗色に着色されている。 In the laser welding method, a laser light transmitting resin member (hereinafter simply referred to as “transmitting member”) and a laser light absorbing resin member (hereinafter also simply referred to as “absorbing member”) are brought into contact with each other. In this method, both members are welded and joined by irradiating the surface of the absorbent member with laser light from the side of the transparent member and heating and melting the contact portion (Patent Document 1). In this method, the transmissive member is required to sufficiently transmit the laser beam, and the absorbent member is required to sufficiently absorb the laser beam and efficiently convert the laser beam into heat. For this purpose, the absorbent member is usually colored in a blue to black dark color.
上記レーザー溶着方法により透過性部材と吸収性部材とを溶着させる場合、両部材は、必須ではないが、同一もしくは類似色相に着色されていることが好ましい。前記の通り吸収性部材はレーザー光を吸収させるために暗色に着色されているので、透過性部材も同様に暗色に着色されていることが望ましい。しかしながら、上記透過性部材は、暗色に着色されていると同時にレーザー光透過性でなければならない。従って透過性部材を着色する場合にはレーザー光に対して非吸収の色素（染・顔料）によって着色されている（特許文献２）。 When the transparent member and the absorbent member are welded by the laser welding method, both members are not essential, but are preferably colored in the same or similar hue. As described above, since the absorptive member is colored dark in order to absorb laser light, it is desirable that the transmissive member is similarly colored in dark color. However, the transmissive member must be colored with a dark color and at the same time be laser transmissive. Therefore, when the transparent member is colored, it is colored with a dye (dye / pigment) that does not absorb laser light (Patent Document 2).
上記透過性部材の着色に暗色系の顔料を使用すると、得られる部材のレーザー光非吸収性が損なわれるので、濃色着色は困難である。また、透過性部材を分散染料や油溶性染料で着色することも知られている（特許文献２）。上記染料は樹脂中に溶解することから、着色された樹脂はレーザー光透過性が損なわれず、透過性部材としては有用なものである。
しかしながら、透過性部材の着色に前記染料を使用した場合に、透過性部材が溶着時の熱によって加熱されると、染料が部材中で動き、染料が部材表面にブリードアウトし、透過性部材の色調が変化したり、さらに表面にブリードアウトした染料により、吸収性部材が汚染されたり、溶着物品が他の物品と接触した場合、当該他の物品を汚染するという問題がある。
従って、本発明の目的は、高いレーザー光透過性を保持しつつ、レーザー溶着に際し、色相の変化が生じることなく、また、溶着物品が他の物品と接触した場合、当該他の物品を汚染することがないレーザー光透過性部材を提供することにある。
However, when the dye is used for coloring the permeable member, when the permeable member is heated by heat during welding, the dye moves in the member, the dye bleeds out to the surface of the member, There is a problem that when the color tone changes or the absorbent member is contaminated by the dye bleed out on the surface, or when the welded article comes into contact with another article, the other article is contaminated.
Accordingly, an object of the present invention is to maintain high laser light transmittance without causing a change in hue during laser welding, and when the welded article comes into contact with another article, the other article is contaminated. It is an object of the present invention to provide a laser light transmissive member that does not occur .
上記目的は以下の本発明によって達成される。すなわち、本発明は、レーザー溶着に用いられるレーザー光透過性部材であって、ポリマー色素と、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、Ｈ 2 レーザー、Ｎ 2 レーザー、および半導体レーザーからなる群より選択される一種のレーザー光を透過する樹脂と、を含有するレーザー光透過性着色樹脂組成物からなり、前記ポリマー色素が、アントラキノン系および／またはナフタルイミド系の色素モノマーの重合体または共重合体であり、前記樹脂が、ポリエチレン、ポリプロピレン、エチレン−酢酸ビニル共重合体、ポリスチレン、ポリカーボネート、ポリアミド、ポリエステル、およびアクリル樹脂からなる群より選択される少なくとも一種の熱可塑性樹脂であることを特徴とするレーザー光透過性部材を提供する。 The above object is achieved by the present invention described below. That is, the present invention is a laser light transmissive member used for laser welding, comprising a polymer dye, glass: neodymium 3+ laser, YAG: neodymium 3+ laser, ruby laser, helium-neon laser, krypton laser, argon. laser, H 2 laser, N 2 laser, and a resin that transmits a laser beam of one selected from the group consisting of a semiconductor laser, Ri Do from the laser ray transmitting colored resin composition containing the polymer dye, A polymer or copolymer of anthraquinone and / or naphthalimide dye monomers, wherein the resin is made of polyethylene, polypropylene, ethylene-vinyl acetate copolymer, polystyrene, polycarbonate, polyamide, polyester, and acrylic resin. Selected from the group Both provide a laser ray transmitting member, characterized in der one thermoplastic resin Rukoto.
上記レーザー光透過性部材においては、前記ポリマー色素が、アントラキノン系および／またはナフタルイミド系の色素モノマーの重合体または共重合体であること；暗色に着色されていること；前記樹脂１００質量部に対する前記ポリマー色素の含有量が、０．０１〜１０質量部であることが好ましい。 In the laser light transmitting member, wherein the polymer dye, anthraquinone and / or a polymer or copolymer of naphthalimide dye monomers; it is colored dark color; the resin 100 parts by weight It is preferable that content of the said polymer pigment | dye with respect to is 0.01-10 mass parts .
また、本発明は、上記本発明のレーザー光透過性部材と、レーザー光吸収性部材と、を当接させ、前記透過性部材側からレーザー光を照射し、レーザー溶着して両部材を接合することを特徴とする接合体の製造方法を提供する。 Further, the present invention includes a laser light-transmitting member of the present invention, brought into contact and the laser ray absorbing member, is irradiated with laser light from the transparent member side, joining two members by laser welding A method for producing a joined body is provided.
本発明によれば、高いレーザー光透過性を保持しつつ、レーザー溶着に際し、色相の変化が生じることなく、また、溶着物品が他の物品と接触した場合、当該他の物品を汚染することがないレーザー光透過性着色樹脂組成物からなるレーザー光透過性部材を提供することができる。 According to the present invention, while maintaining high laser light transmittance, the hue does not change during laser welding, and when the welded article comes into contact with another article, the other article can be contaminated. It is possible to provide a laser light transmissive member comprising a non- laser light transmissive colored resin composition.
次に好ましい実施態様を挙げて本発明をさらに詳細に説明する。
本発明の着色樹脂組成物は、ポリマー色素とレーザー光を透過する樹脂、特に熱可塑性樹脂からなる。ポリマー色素とは従来の分散染料、昇華性染料、油溶性染料などを高分子量化した色素を意味する。ポリマー色素としては、例えば、アゾ系、アントラキノン系、ナフタルイミド系などの分散染料、昇華性染料、油溶性染料などにビニル基や（メタ）アクリロイル基などの重合性基を導入した色素モノマーを単独でまたは色素構造を有さない通常のビニルモノマーやアクリルモノマーと共重合させたポリマー色素が挙げられる。これらのポリマー色素としては、合成したものでも市販のものでも使用できる。市場から入手できるポリマー色素としては、例えば、DayGlo社から商品名「ジェムトンGC-13Ruby Red」、「ジェムトンGC-17Citrine Yellow」および「ジェムトンGC-19Sapphire Blue」などが挙げられる。
Next, the present invention will be described in more detail with reference to preferred embodiments.
The colored resin composition of the present invention comprises a polymer dye and a resin that transmits laser light, particularly a thermoplastic resin. The polymer pigment means a pigment obtained by increasing the molecular weight of a conventional disperse dye, sublimation dye, oil-soluble dye, or the like. As the polymer dye, for example, a dye monomer in which a polymerizable group such as a vinyl group or a (meth) acryloyl group is introduced into a disperse dye such as azo, anthraquinone or naphthalimide, a sublimation dye or an oil-soluble dye is used alone. Or a polymer dye copolymerized with an ordinary vinyl monomer or acrylic monomer having no dye structure. These polymer dyes may be synthesized or commercially available. Examples of polymer dyes available from the market include “Gemton GC-13Ruby Red”, “Gemton GC-17Citrine Yellow”, and “Gemton GC-19 Sapphire Blue” from DayGlo.
また、レーザー光を透過する樹脂としては、レーザー光を透過する樹脂であればどのような種類の樹脂を用いてもよいが、一般的には熱可塑性樹脂が使用できる。熱可塑性樹脂としては、例えば、ポリエチレン、ポリプロピレン、エチレン−酢酸ビニル共重合体、ポリスチレン、ポリカーボネート、ポリアミド、ポリエステル、アクリル樹脂などが挙げられる。 As the resin that transmits laser light, any type of resin may be used as long as it is a resin that transmits laser light, but in general, a thermoplastic resin can be used. Examples of the thermoplastic resin include polyethylene, polypropylene, ethylene-vinyl acetate copolymer, polystyrene, polycarbonate, polyamide, polyester, acrylic resin, and the like.
本発明の樹脂組成物は、上記熱可塑性樹脂を前記ポリマー色素で着色することによって得られる。着色方法は従来の樹脂の着色方法に準じればよい。例えば、未着色の樹脂ペレットに所定量の前記ポリマー色素を混合し、該混合物を押出機などにより溶融混練して着色ペレットとする方法、該方法と同様の方法で高濃度に色素を含有するカラーコンセントレイト（カラーマスターバッチ）を調製し、該カラーコンセントレイトを透過性部材の成形時にナチュラル樹脂に所定量混合して部材を成形する方法などが挙げられる。 The resin composition of this invention is obtained by coloring the said thermoplastic resin with the said polymer pigment | dye. The coloring method may be in accordance with a conventional resin coloring method. For example, a method in which a predetermined amount of the polymer dye is mixed with uncolored resin pellets, the mixture is melt-kneaded with an extruder or the like to form colored pellets, or a color containing a dye at a high concentration by the same method as this method A method of preparing a concentrate (color master batch) and mixing the color concentrate with a natural resin at the time of molding a permeable member to mold the member is exemplified.
上記で得られる着色樹脂組成物の色素含有量は、吸収性部材の着色の程度と同様とすることが好ましく、特に限定されないが、樹脂１００質量部当たり０．０１〜１０質量部の色素含有量が好ましい。色素含有量が０．０１質量部未満では十分な着色濃度が得られない。一方、色素含有量が１０質量部を超えても着色濃度は飽和するのみで、レーザー光の透過性が低下し、また、コストアップの原因となるので好ましくない。 The pigment content of the colored resin composition obtained above is preferably the same as the coloring degree of the absorbent member, and is not particularly limited, but is 0.01 to 10 parts by mass of the pigment content per 100 parts by mass of the resin. Is preferred. If the pigment content is less than 0.01 parts by mass, a sufficient color density cannot be obtained. On the other hand, even if the pigment content exceeds 10 parts by mass, the color density is only saturated, the laser light transmittance is lowered, and the cost is increased, which is not preferable.
また、着色される色相は、吸収性部材が主に黒色系に着色されていることから、透過性部材は青色系〜紫色系〜黒色系の暗色であることが好ましい。これらの暗色系の着色は暗色系の色素単独を用いて行ってもよいし、各色を配合した配合色素を用いて行ってもよい。例えば、赤色、黄色および青色の各色素を配合して黒色に着色することができる。 Moreover, since the absorptive member is mainly colored black, as for the hue to be colored, it is preferable that a transparent member is a blue color-purple color-black color dark color. These dark-colored coloring may be performed using a dark-colored pigment alone, or may be performed using a blended pigment in which each color is blended. For example, red, yellow and blue pigments can be blended and colored black.
本発明の着色樹脂組成物は、さらにレーザー光の透過性を阻害しない範囲内で、顔料、染料などの各種着色剤を含むことができる。また、本発明の着色樹脂組成物には、その他の各種添加剤、例えば、安定剤、酸化防止剤、帯電防止剤、ワックス類、紫外線防止剤、難燃剤および各種フィラーを必要に応じて配合することができる。 The colored resin composition of the present invention can further contain various colorants such as pigments and dyes within a range not impairing the laser beam permeability. In addition, the colored resin composition of the present invention is blended with various other additives such as stabilizers, antioxidants, antistatic agents, waxes, UV inhibitors, flame retardants and various fillers as necessary. be able to.
本発明の着色樹脂組成物は、透過性部材と同一濃度の着色樹脂ペレット、高濃度に着色されたカラーコンセントレイトでもよいし、また、部材成形時に配合して使用する単色ペレットでもよいし、さらに所望の形状に成形された成形物であってもよい。このような本発明の着色樹脂組成物はレーザー溶着に使用する透過性部材の成形原料、および透過性部材として有用である。 The colored resin composition of the present invention may be a colored resin pellet having the same concentration as that of the permeable member, a color concentrate colored at a high concentration, or may be a single-color pellet that is blended and used at the time of molding the member. It may be a molded product formed into a shape of. Such a colored resin composition of the present invention is useful as a raw material for forming a transparent member used for laser welding and a transparent member.
本発明のレーザー溶着方法は、上記本発明の着色樹脂組成物からなる透過性部材と、吸収性部材とを当接させ、上記透過性部材側からレーザー光を照射して、両部材を接合することを特徴としている。 In the laser welding method of the present invention, the transparent member made of the colored resin composition of the present invention and an absorbent member are brought into contact with each other, and laser light is irradiated from the transparent member side to join both members. It is characterized by that.
上記方法で使用する透過性部材は、前記本発明の着色樹脂組成物を射出成形、押出成形、その他の公知の方法で成形することによって得られる。該部材の色相は特に限定されないが、一般的には吸収性部材と同一または類似の色相である。また、上記吸収性部材は、前記着色樹脂組成物を構成している樹脂と同じまたは異なる樹脂をカーボンブラック、グラファイト、無機系着色剤、有機系着色剤などのレーザー光を良好に吸収して発熱する着色剤によって着色した組成物を常法に従って成形して得られる。 The permeable member used in the above method is obtained by molding the colored resin composition of the present invention by injection molding, extrusion molding, or other known methods. The hue of the member is not particularly limited, but is generally the same or similar hue as that of the absorbent member. Further, the absorptive member generates heat by satisfactorily absorbing a laser beam such as carbon black, graphite, an inorganic colorant, an organic colorant, or the like, which is the same or different from the resin constituting the colored resin composition. It is obtained by molding a composition colored with a coloring agent to be formed according to a conventional method.
本発明のレーザー溶着方法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、半導体レーザーなどのレーザー光を挙げることができる。より好ましいレーザーとしては、ＹＡＧ：ネオジム3+レーザーである。 Laser light used in the laser welding method of the present invention includes glass: neodymium 3+ laser, YAG: neodymium 3+ laser, ruby laser, helium-neon laser, krypton laser, argon laser, H 2 laser, N 2 laser, A laser beam such as a semiconductor laser can be mentioned. A more preferable laser is a YAG: neodymium 3+ laser.
レーザー光の波長は、溶着される部材により異なるため一概に決定できないが、１，０６０ｎｍ以下であることが好ましい。波長が１，０６０ｎｍを超えると、部材の接合面を互いに溶融させることが困難となる。 The wavelength of the laser beam differs depending on the member to be welded and cannot be determined unconditionally, but is preferably 1,060 nm or less. If the wavelength exceeds 1,060 nm, it becomes difficult to melt the joint surfaces of the members.
また、レーザー光の出力は、５〜３０Ｗであることが好ましい。レーザー光の出力が５Ｗ未満では、出力が低く部材の接合面を互いに溶融させることが困難となり、３０Ｗを超えると、出力が過剰となり部材が蒸発したり、変質するという問題が生じるようになる。 Moreover, it is preferable that the output of a laser beam is 5-30W. If the output of the laser beam is less than 5 W, the output is low and it becomes difficult to melt the joint surfaces of the members. If the output exceeds 30 W, the output becomes excessive and the member evaporates or deteriorates.
本発明のレーザー溶着方法は、透過性部材と吸収性部材を重ね合わせた状態で、この重ね合わせ部に透過性部材側からレーザー光を照射することで、レーザー光が透過性部材中を透過する。透過したレーザー光は、吸収性部材表面に到達し、エネルギーとして蓄積される。この蓄積されたエネルギー分布は、レーザー光が予め持っていたエネルギー分布に対して透過性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、透過性部材および吸収性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。 In the laser welding method of the present invention, a laser beam is transmitted through the transparent member by irradiating the overlapped portion with laser light from the transparent member side in a state where the transparent member and the absorbent member are overlapped. . The transmitted laser light reaches the absorbent member surface and is stored as energy. This accumulated energy distribution becomes a non-uniform energy distribution due to scattering during transmission of the transmissive member with respect to the energy distribution previously possessed by the laser beam. Then, since heating and melting with non-uniform energy distribution are performed on the bonding surface, a bonded portion in which the permeable member and the absorbent member are entangled with each other is generated, and the bonded portion of the obtained bonded body is strong. become.
次に実施例および比較例を挙げて本発明をさらに具体的に説明する。なお、以下の文中における「％」は質量基準である。 Next, the present invention will be described more specifically with reference to examples and comparative examples. In the following text, “%” is based on mass.
［実施例１］
ポリブチレンテレフタレート樹脂に、ポリマー色素（商品名：ジェムトンGC-13Ruby Red、DayGlo社製）、同ジェムトン GC-17Citrine Yellowおよび同ジェムトン GC-19Sapphire Blueをそれぞれ樹脂の０．２％の割合で配合し、押出機にて溶融混練してペレット化し、本発明の着色樹脂組成物とした。該着色樹脂組成物を射出成形機にて２ｍｍ厚の着色プレートを作成し、実施例１の評価プレートとした。
[Example 1]
In polybutylene terephthalate resin, polymer dye (trade name: Gemton GC-13Ruby Red, manufactured by DayGlo), Gemton GC-17Citrine Yellow and Gemton GC-19Sapphire Blue are blended at a ratio of 0.2% of the resin. It was melt-kneaded by an extruder and pelletized to obtain the colored resin composition of the present invention. A colored plate having a thickness of 2 mm was prepared from the colored resin composition using an injection molding machine, and used as an evaluation plate of Example 1.
［実施例２］
ポリブチレンテレフタレート樹脂に、ポリマー色素（商品名：ジェムトン GC-19Sapphire Blue、DayGlo社製）を樹脂の０．２％の割合で配合し、押出機にて溶融混練してペレット化し、本発明の着色樹脂組成物とした。該着色樹脂組成物を射出成形機にて２ｍｍ厚の着色プレートを作成し、実施例２の評価プレートとした。
[Example 2]
A polymer dye (trade name: Gemton GC-19 Sapphire Blue, manufactured by DayGlo) is blended with polybutylene terephthalate resin at a ratio of 0.2% of the resin, and is melt-kneaded with an extruder to form a pellet, which is colored according to the present invention. A resin composition was obtained. A colored plate having a thickness of 2 mm was prepared from the colored resin composition using an injection molding machine, and used as an evaluation plate of Example 2.
［比較例１］
ポリブチレンテレフタレート樹脂に、油溶性染料（商品名：スミプラストエローHLR（Solvent Yellow114）、住友化学製）を樹脂の０．１％の割合および同スミプラストバイオレットB（Solvent Violet13）を樹脂の０．５％の割合で配合し、押出機にて溶融混練してペレット化し、比較例１の着色樹脂組成物とした。該着色樹脂組成物を射出成形機にて２ｍｍ厚の着色プレートを作成し、比較例１の評価プレートとした。
[Comparative Example 1]
Polybutylene terephthalate resin, oil-soluble dye (trade name: Sumiplast Yellow HLR (Solvent Yellow 114), manufactured by Sumitomo Chemical Co., Ltd.) at a ratio of 0.1% of the resin, and Sumiplast Violet B (Solvent Violet 13) at 0. The mixture was blended at a ratio of 5%, melt-kneaded with an extruder, and pelletized to obtain a colored resin composition of Comparative Example 1. A colored plate having a thickness of 2 mm was prepared from the colored resin composition using an injection molding machine, and used as an evaluation plate of Comparative Example 1.
［比較例２］
ポリブチレンテレフタレート樹脂に、カーボンブラックを樹脂の０．１％の割合で配合し、押出機にて溶融混練してペレット化し、比較例２の着色樹脂組成物とした。該着色樹脂組成物を射出成形機にて２ｍｍ厚の着色プレートを作成し、比較例２の評価プレートとした。
[Comparative Example 2]
Carbon black was blended with the polybutylene terephthalate resin at a ratio of 0.1% of the resin, and the mixture was melt-kneaded with an extruder and pelletized to obtain a colored resin composition of Comparative Example 2. A colored plate having a thickness of 2 mm was prepared from the colored resin composition by an injection molding machine, and used as an evaluation plate of Comparative Example 2.
［比較例３］
ポリブチレンテレフタレート樹脂に、銅フタロシアニンブルーを樹脂の０．２％の割合で配合し、押出機にて溶融混練してペレット化し、比較例３の着色樹脂組成物とした。該着色樹脂組成物を射出成形機にて２ｍｍ厚の着色プレートを作成し、比較例３の評価プレートとした。
[Comparative Example 3]
The polybutylene terephthalate resin was blended with copper phthalocyanine blue at a ratio of 0.2% of the resin, melt-kneaded with an extruder, and pelletized to obtain a colored resin composition of Comparative Example 3. A colored plate having a thickness of 2 mm was prepared from the colored resin composition by an injection molding machine, and used as an evaluation plate of Comparative Example 3.
［評価例］
以上の方法で得られた実施例および比較例の評価プレートについて、色移り性およびレーザー光透過性を、それぞれ下記の方法で評価した結果、下記表１に示す結果が得られた。
[Evaluation example]
About the evaluation plate of the Example obtained by the above method and a comparative example, as a result of evaluating the color transfer property and the laser beam transmittance by the following methods, the results shown in Table 1 below were obtained.
＜色移り評価方法＞
各評価プレートと着色されていないポリブチレンテレフタレート樹脂プレートとをそれぞれ重ね合わせ、１４０℃のオーブンに４時間入れ、着色されていないポリブチレンテレフタレート樹脂プレートが、評価プレートからの色移りにより着色されているか否かを評価した。
○：色移りしていない。
×：色移りしている。
<Color transfer evaluation method>
Each evaluation plate and uncolored polybutylene terephthalate resin plate are overlaid and placed in an oven at 140 ° C. for 4 hours. Whether the uncolored polybutylene terephthalate resin plate is colored due to color transfer from the evaluation plate. Evaluated whether or not.
○: No color transfer
X: The color has moved.
＜レーザー光透過性評価方法＞
分光光度計を用いて各評価プレートの透過率測定を行ない、その結果により以下のように評価した。
○：レーザー光透過率が２０％以上
×：レーザー光透過率が２０％未満
The transmittance of each evaluation plate was measured using a spectrophotometer, and the results were evaluated as follows.
○: Laser light transmittance is 20% or more ×: Laser light transmittance is less than 20%
表１に示すように、本発明の着色樹脂組成物からなる透過性部材は、色移りが発生せず、また、高いレーザー光透過性を持つことが分かる。 As shown in Table 1, it can be seen that the transparent member made of the colored resin composition of the present invention does not cause color transfer and has high laser light transmittance.
本発明によれば、高いレーザー光透過性を保持しつつ、レーザー溶着に際し、色相の変化が生じることなく、また、溶着物品が他の物品と接触した場合、当該他の物品を汚染することがないレーザー光透過性着色樹脂組成物からなるレーザー光透過性部材を提供することができる。 According to the present invention, while maintaining high laser light transmittance, the hue does not change during laser welding, and when the welded article comes into contact with another article, the other article can be contaminated. It is possible to provide a laser light transmissive member comprising a non- laser light transmissive colored resin composition.
Claims (4)
ポリマー色素と、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、Ｈ 2 レーザー、Ｎ 2 レーザー、および半導体レーザーからなる群より選択される一種のレーザー光を透過する樹脂と、を含有するレーザー光透過性着色樹脂組成物からなり、
前記ポリマー色素が、アントラキノン系および／またはナフタルイミド系の色素モノマーの重合体または共重合体であり、
前記樹脂が、ポリエチレン、ポリプロピレン、エチレン−酢酸ビニル共重合体、ポリスチレン、ポリカーボネート、ポリアミド、ポリエステル、およびアクリル樹脂からなる群より選択される少なくとも一種の熱可塑性樹脂であることを特徴とするレーザー光透過性部材。 A laser light transmitting member used for laser welding,
Polymer dye and glass: selected from the group consisting of neodymium 3+ laser, YAG: neodymium 3+ laser, ruby laser, helium-neon laser, krypton laser, argon laser, H 2 laser, N 2 laser, and semiconductor laser a resin that transmits a type of laser beam, Ri Do from the laser ray transmitting colored resin composition containing,
The polymer dye is a polymer or copolymer of anthraquinone and / or naphthalimide dye monomers,
Wherein the resin is selected from the group consisting of polyethylene, polypropylene, ethylene - vinyl acetate copolymer, a laser beam of polystyrene, polycarbonate, polyamide, polyester, and at least one thermoplastic resin der wherein Rukoto selected from the group consisting of acrylic resin Transparent member.
前記レーザー光透過性部材側からレーザー光を照射し、レーザー溶着して両部材を接合することを特徴とする接合体の製造方法。 The laser light transmitting member according to any one of claims 1 to 3 and a laser light absorbing member are brought into contact with each other,
A method of manufacturing a joined body comprising irradiating a laser beam from the laser light transmitting member side and welding both members by laser welding.
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