JP2012158054A - Laminate, and method for manufacturing the same - Google Patents

Laminate, and method for manufacturing the same Download PDF

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Publication number
JP2012158054A
JP2012158054A JP2011018671A JP2011018671A JP2012158054A JP 2012158054 A JP2012158054 A JP 2012158054A JP 2011018671 A JP2011018671 A JP 2011018671A JP 2011018671 A JP2011018671 A JP 2011018671A JP 2012158054 A JP2012158054 A JP 2012158054A
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Prior art keywords
nonwoven fabric
polyester nonwoven
electron beam
polyester
laminate
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JP2011018671A
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Izumi Yagi
木 泉 八
Takayuki Ueki
木 貴 之 植
Junichi Kuroki
木 潤 一 黒
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Dai Nippon Printing Co Ltd
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Dai Nippon Printing Co Ltd
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Priority to JP2011018671A priority Critical patent/JP2012158054A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—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
    • B29C65/1429—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 characterised by the way of heating the interface
    • B29C65/1432—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 characterised by the way of heating the interface direct heating of the surfaces 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
    • 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
    • B29C65/1429—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 characterised by the way of heating the interface
    • B29C65/1435—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 characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. 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
    • B29C65/1429—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 characterised by the way of heating the interface
    • B29C65/1445—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 characterised by the way of heating the interface heating both sides of the joint
    • 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
    • B29C65/1429—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 characterised by the way of heating the interface
    • B29C65/1454—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 characterised by the way of heating the interface scanning at least one of the parts to be joined
    • B29C65/1458—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 characterised by the way of heating the interface scanning at least one of the parts to be joined once, i.e. contour 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
    • B29C65/1429—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 characterised by the way of heating the interface
    • B29C65/1464—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 characterised by the way of heating the interface making use of several radiators
    • 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
    • B29C65/1429—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 characterised by the way of heating the interface
    • B29C65/1464—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 characterised by the way of heating the interface making use of several radiators
    • B29C65/1467—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 characterised by the way of heating the interface making use of several radiators at the same time, i.e. simultaneous 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
    • 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
    • B29C66/45—Joining of substantially the whole surface of the articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—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
    • B29C66/729—Textile or other fibrous material made from plastics
    • B29C66/7294—Non woven mats, e.g. felt
    • 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
    • B29C66/735—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 extensive physical properties of the parts to be joined
    • B29C66/7352—Thickness, e.g. very thin
    • B29C66/73521—Thickness, e.g. very thin of different thickness, i.e. the thickness of one of the parts to be joined being different from the thickness of the other part
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • 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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • 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
    • B29C66/001—Joining in special atmospheres
    • B29C66/0012—Joining in special atmospheres characterised by the type of environment
    • B29C66/0014—Gaseous environments
    • B29C66/00141—Protective gases

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Toxicology (AREA)
  • Textile Engineering (AREA)
  • Laminated Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a laminate formed by bonding two sheets of polyester nonwoven fabrics without using an adhesive, causing no leaching of a foreign matter and a remaining solvent with the nonwoven fabric sheets firmly bonded with each other without deteriorating the original performance of the nonwoven fabric.SOLUTION: Bonding is formed among atoms in a first polyester nonwoven fabric and atoms in a second polyester nonwoven fabric at least at some parts of the first polyester nonwoven fabric and second polyester nonwoven fabric, and the first polyester nonwoven fabric and second polyester nonwoven fabric are bonded to each other without using an adhesive.

Description

本発明は、積層体に関し、さらに詳細には、ポリエステル不織布どうしを、接着剤を介さずに接着した積層体およびその製造方法に関する。   The present invention relates to a laminate, and more particularly, to a laminate in which polyester nonwoven fabrics are bonded without using an adhesive and a method for producing the same.

ポリオレフィン系樹脂、ポリエステル系樹脂、ポリアミド系樹脂等の種々の高分子材料を繊維化したものウェッブ状に形成した不織布が広く使用されている。これら不織布は、使用する高分子材料の特性や繊維の特性に応じてさまざまな機能を発現し、その機能が発揮できるような用途に使用される。   Nonwoven fabrics that have been formed into a web-like shape obtained by fiberizing various polymer materials such as polyolefin resins, polyester resins, and polyamide resins are widely used. These non-woven fabrics are used for applications that exhibit various functions depending on the characteristics of the polymer material used and the characteristics of the fibers, and can exhibit these functions.

また、各種不織布はそのまま単独で使用されることもあるが、異なる高分子材料からなる不織布どうしを重ね合わせて不織布の積層体としたり、不織布とフィルムとを貼り合わせて、より高機能を発現できるような形態に加工することも行われている。このような積層体を形成する場合、接着剤（ラミネート樹脂）を用いて、二種の不織布を重ね合わせたり、不織布とフィルムとを重ね合わせて接着することが行われている。また、不織布やフィルムの材料によっては、ヒートシール加工、すなわち、熱を加えて、一方または両方の繊維ないしフィルムを軟化、溶融させて、互いの材料を接着することが行われている。   In addition, various non-woven fabrics may be used alone, but non-woven fabrics made of different polymer materials can be layered to form a laminate of non-woven fabrics, or non-woven fabrics and films can be bonded together to express higher functionality. Processing into such a form is also performed. When forming such a laminated body, two types of non-woven fabrics are superposed using an adhesive (laminate resin), or a non-woven fabric and a film are superposed and bonded. Further, depending on the material of the nonwoven fabric or the film, heat sealing, that is, applying heat, softening and melting one or both fibers or films and bonding the materials to each other is performed.

しかしながら、異種材料からなる不織布ないしフィルムをラミネート樹脂を介して接着して積層体とした場合、ラミネート樹脂が不織布の開口部分を塞いでしまい、不織布本来の性能が低下してしまうことがあった。また、ラミネート樹脂成分が徐々に積層体から外部に溶出または揮発する場合があり、特に、安全性やクリーン性が重視される医療用分野においては、使用するラミネート樹脂によっては、不織布積層体に包装された内容物等を汚染してしまうことがあった。さらに、不織布積層体の使用分野によっては、長期使用によりラミネート樹脂自体が劣化することもあり、特に屋外等で使用される外装用途においては、ラミネート加工した積層体の耐候性が問題となることもあった。一方、不織布どうし、または不織布とフィルムとを貼り合わせてヒートシールして積層体を形成する場合には、ラミネート樹脂を使用しないため、上記のような問題は生じないものの、使用する材料によってはヒートシールできなかったり、接着強度が弱く実用に耐えないといった場合があった。   However, when a nonwoven fabric or film made of different materials is bonded via a laminate resin to form a laminate, the laminate resin may block the opening of the nonwoven fabric, and the inherent performance of the nonwoven fabric may deteriorate. In addition, the laminate resin component may gradually elute or volatilize from the laminate to the outside. Especially in the medical field where safety and cleanliness are important, depending on the laminate resin used, the laminate resin component may be packaged in a nonwoven fabric laminate. In some cases, the contents may be contaminated. Furthermore, depending on the field of use of the nonwoven fabric laminate, the laminate resin itself may deteriorate due to long-term use, and particularly in exterior applications used outdoors, the weather resistance of the laminated laminate may become a problem. there were. On the other hand, when a laminated body is formed by bonding non-woven fabrics or a non-woven fabric and a film to form a laminate, the above-mentioned problems do not occur because the laminate resin is not used. In some cases, it could not be sealed, or the adhesive strength was weak and it could not withstand practical use.

ところで、放射線や電子線を用いて材料の表面改質を行うことが従来から行われている。例えば、特開２００３−１１９２９３号公報（特許文献１）には、フッ素系樹脂に放射線を照射することにより架橋複合フッ素系樹脂が得られることが提案されている。また、Journal of Photopolymer Science and Technology Vol.19, No. 1 (2006), pp123-127（非特許文献１）には、ポリテトラフルオロエチレンフィルムとポリイミドフィルムとを積層させて高温下で電子線（以下、ＥＢと略す場合もある）を照射することにより、互いを接着することが提案されている。また、Material Transactions Vol.50, No.7 (2009), pp1859-1863（非特許文献２）には、ポリカーボネート樹脂の表面をナイロンフィルムで覆い、その上から電子線（以下、ＥＢと略す場合もある）を照射することにより、ポリカーボネート樹脂表面にナイロンフィルムを接着する技術が提案されている。さらに、日本金属学会誌第７２巻第７号（２００８）、ｐｐ５２６−５３１（非特許文献３）には、シリコーンゴム上に置いたナイロンフィルムの上からＥＢを照射することにより、互いを接着できることが記載されている。   By the way, surface modification of a material using radiation or an electron beam has been conventionally performed. For example, Japanese Patent Application Laid-Open No. 2003-119293 (Patent Document 1) proposes that a crosslinked composite fluororesin can be obtained by irradiating the fluororesin with radiation. In Journal of Photopolymer Science and Technology Vol.19, No. 1 (2006), pp123-127 (Non-patent Document 1), a polytetrafluoroethylene film and a polyimide film are laminated and an electron beam ( In the following, it has been proposed to bond each other by irradiating EB. In Material Transactions Vol.50, No.7 (2009), pp1859-1863 (Non-patent Document 2), the surface of the polycarbonate resin is covered with a nylon film, and an electron beam (hereinafter abbreviated as EB) may be applied from above. A technique for adhering a nylon film to a polycarbonate resin surface has been proposed. Furthermore, the Journal of the Japan Institute of Metals, Vol. 72, No. 7 (2008), pp 526-531 (Non-patent Document 3) can be bonded to each other by irradiating EB from a nylon film placed on silicone rubber. Is described.

特開２００３−１１９２９３号公報JP 2003-119293 A

Journal of Photopolymer Science and Technology Vol.19, No. 1 (2006), pp123-127Journal of Photopolymer Science and Technology Vol.19, No. 1 (2006), pp123-127 Material Transactions Vol.50, No. 7(2009), pp1859-1863Material Transactions Vol.50, No. 7 (2009), pp1859-1863 日本金属学会誌第７２巻第７号（２００８）、ｐｐ５２６−５３１Journal of the Japan Institute of Metals, Vol. 72, No. 7 (2008), pp 526-531

本発明者らは、今般、異種材料どうしを接着する場合であっても、貼り合わせる材料の表面に電子線を照射することにより、ラミネート樹脂等を用いることなく、互いを強固に接着できることを見いだした。そして、二種のポリエステル不織布を互いに貼り合わせた積層体のように、従来、接着剤ないしヒートシール加工により互いを接着していた積層体であっても、電子線照射によれば、接着剤を使用しなくても、一方のポリエステル不織布側の原子と他方のポリエステル不織布側の原子との間に共有結合または水素結合が形成されて、互いが強固に接着できる、との知見を得た。本発明はかかる知見によるものである。   The present inventors have now found that even when dissimilar materials are bonded to each other, by irradiating the surface of the material to be bonded with an electron beam, they can be firmly bonded to each other without using a laminate resin or the like. It was. And even if it is a laminate that has been bonded to each other by an adhesive or heat seal processing, like a laminate in which two types of polyester nonwoven fabrics are bonded together, according to electron beam irradiation, Even if not used, the knowledge that a covalent bond or a hydrogen bond was formed between the atom on the one polyester nonwoven fabric side and the atom on the other polyester nonwoven fabric side, and it was able to adhere firmly to each other was acquired. The present invention is based on this finding.

したがって、本発明の目的は、２枚のポリエステル不織布どうしを接着剤を使用せずに接着した積層体であって、異物や残留溶剤等が滲出することがなく、また、不織布本来の性能を低下させることなく互いの不織布が強固に接着した積層体を提供することである。   Therefore, the object of the present invention is a laminate in which two polyester nonwoven fabrics are bonded to each other without using an adhesive, and foreign matter and residual solvent do not ooze out. It is providing the laminated body to which the nonwoven fabric of each other adhered firmly without making it.

本発明による積層体は、第１のポリエステル不織布と第２のポリエステル不織布とが積層した積層体であって、
前記第１のポリエステル不織布および前記第２のポリエステル不織布の少なくとも一部で、前記第１のポリエステル不織布中の原子と、前記第２のポリエステル不織布中の原子との間に結合が形成されており、前記第１のポリエステル不織布および前記第２のポリエステル不織布とが接着剤を介さずに接着されていることを特徴とするものである。 The laminate according to the present invention is a laminate in which a first polyester nonwoven fabric and a second polyester nonwoven fabric are laminated,
In at least a part of the first polyester nonwoven fabric and the second polyester nonwoven fabric, a bond is formed between an atom in the first polyester nonwoven fabric and an atom in the second polyester nonwoven fabric, The first polyester nonwoven fabric and the second polyester nonwoven fabric are bonded without using an adhesive.

また、本発明の態様として、前記第１のポリエステル不織布および第２のポリエステル不織布中の原子に酸素原子または水酸基が結合しており、前記第１のポリエステル不織布中の酸素原子および／または水酸基と、前記第２のポリエステル不織布中の酸素原子または水酸基との間で結合が形成されていることが好ましい。   Further, as an aspect of the present invention, an oxygen atom or a hydroxyl group is bonded to an atom in the first polyester nonwoven fabric and the second polyester nonwoven fabric, and an oxygen atom and / or a hydroxyl group in the first polyester nonwoven fabric, It is preferable that a bond is formed between an oxygen atom or a hydroxyl group in the second polyester nonwoven fabric.

また、本発明の態様として、前記第１および第２のポリエステル不織布が、ポリエチレンテレフタレート、ポリトリメチレンテレフタレート、ポリブチレンテレフタレート、ポリエチレンナフタレート、もしくはポリブチレンナフタレートからなる繊維、または、これら樹脂を鞘とする複合繊維からなることが好ましい。   Further, as an aspect of the present invention, the first and second polyester nonwoven fabrics are fibers made of polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, or polybutylene naphthalate, or a sheath of these resins. It is preferable to consist of a composite fiber.

また、本発明の別の態様としての製造方法は、第１のポリエステル不織布と第２のポリエステル不織布とが積層した積層体を製造する方法であって、
前記第１のポリエステル不織布および／または前記第２のポリエステル不織布の少なくとも一方の面に電子線を照射し、
前記電子線が照射された前記第１のポリエステル不織布面および／または第２のポリエステル不織布面を重ね合わせて接着する、ことを含んでなることを特徴とするものである。 Moreover, the manufacturing method as another aspect of this invention is a method of manufacturing the laminated body which the 1st polyester nonwoven fabric and the 2nd polyester nonwoven fabric laminated | stacked,
Irradiating at least one surface of the first polyester nonwoven fabric and / or the second polyester nonwoven fabric with an electron beam;
The first polyester nonwoven fabric surface and / or the second polyester nonwoven fabric surface irradiated with the electron beam are overlapped and bonded.

また、前記第１のポリエステル不織布と第２のポリエステル不織布とを重ね合わせる前および／または重ね合わせた後に電子線照射を行うことが好ましい。   Moreover, it is preferable to perform electron beam irradiation before and / or after superimposing the first polyester nonwoven fabric and the second polyester nonwoven fabric.

また、本発明の別の態様として、前記接着を加圧して行うことが好ましく、また、前記接着を加熱して行うことが好ましい。   Moreover, as another aspect of the present invention, the bonding is preferably performed by applying pressure, and the bonding is preferably performed by heating.

本発明によれば、第１のポリエステル不織布と第２のポリエステル不織布とが積層した積層体において、第１のポリエステル不織布中の原子と、第２のポリエステル不織布中の原子とが、直接または酸素原子を介して、結合が形成されているため、接着剤を介して接着していなくても、第１のポリエステル不織布と第２のポリエステル不織布とが強固に接着した積層体が得られる。その結果、異物や残留溶剤等が滲出することがなく、かつ、不織布本来の性能を低下させることなく互いの不織布が強固に接着した積層体を実現することができる。   According to the present invention, in the laminate in which the first polyester nonwoven fabric and the second polyester nonwoven fabric are laminated, the atoms in the first polyester nonwoven fabric and the atoms in the second polyester nonwoven fabric are directly or oxygen atoms. Since the bond is formed through the adhesive, a laminate in which the first polyester nonwoven fabric and the second polyester nonwoven fabric are firmly bonded can be obtained even if the bonding is not performed via the adhesive. As a result, it is possible to realize a laminated body in which the non-woven fabrics are firmly bonded to each other without exuding foreign matters, residual solvents, and the like and without deteriorating the original performance of the non-woven fabric.

本発明の積層体の一実施形態を示した概略断面図である。It is the schematic sectional drawing which showed one Embodiment of the laminated body of this invention. 積層体の界面（接着面）を拡大した模式断面図である。It is the schematic cross section which expanded the interface (adhesion surface) of the laminated body. 本発明による積層体の製造方法の一実施形態を示した概略模式図である。It is the schematic diagram which showed one Embodiment of the manufacturing method of the laminated body by this invention. 製造工程の一部を拡大した概略模式図である。It is the schematic schematic diagram which expanded a part of manufacturing process. 本発明による積層体の製造方法の別の実施形態を示した概略模式図である。It is the schematic diagram which showed another embodiment of the manufacturing method of the laminated body by this invention. 本発明による積層体の製造方法の別の実施形態を示した概略模式図である。It is the schematic diagram which showed another embodiment of the manufacturing method of the laminated body by this invention. 本発明による積層体の製造方法の別の実施形態を示した概略模式図である。It is the schematic diagram which showed another embodiment of the manufacturing method of the laminated body by this invention.

以下、本発明による積層体を、図面を参照しながら説明する。本発明による積層体は、図１に示すように、第１のポリエステル不織布１が第２のポリエステル不織布２の少なくとも一方の表面に、接着剤を介さずに積層した構造を有する。   Hereinafter, the laminated body by this invention is demonstrated, referring drawings. As shown in FIG. 1, the laminate according to the present invention has a structure in which a first polyester nonwoven fabric 1 is laminated on at least one surface of a second polyester nonwoven fabric 2 without using an adhesive.

本発明による積層体は、第１のポリエステル不織布１および第２のポリエステル不織布２の接着面の少なくとも一部で、第１のポリエステル不織布中の原子と、第２のポリエステル不織布中の原子との間に結合が形成されることにより、第１のポリエステル不織布１と第２のポリエステル不織布２とが強固に接着されている。通常、ポリエステル不織布どうしを積層しても、両者の間に水素結合や共有結合が形成されないため接着剤を使用するか、ヒートシールしなければ両者を接着することはできない。本発明においては、後記するように、第１のポリエステル不織布１および／または第２のポリエステル不織布２の表面に電子線を照射してラジカルを発生させて、図２に示すように、第１のポリエステル不織布１表面の原子と第２のポリエステル不織布２表面の原子との間に結合を形成する、ないしは第１のポリエステル不織布１表面の原子と、ポリエステル不織布２表面の原子との間に、酸素原子を介して結合を形成することにより、接着剤を介することなく第１のポリエステル不織布１と第２のポリエステル不織布２とを強固に接着したものである。また、電子線照射により発生したラジカルと空気中の酸素とが結合して、第１のポリエステル不織布１および／または第２のポリエステル不織布２の表面にはＯＨ基が存在することがあり、その場合、一方のポリエステル不織布側のＯＨ基と他方のポリエステル不織布側のＯＨ基またはエステル基の酸素原子とが結合を形成する場合もある。なお、電子線照射によりラジカルの発生は、電子スピン共鳴装置（以下、ＥＳＲともいう。）を用いて、電子線照射後の不織布中の繊維に存在するフリーラジカル種を同定することにより、その発生を確認することができる。   The laminate according to the present invention is at least part of the bonding surface of the first polyester nonwoven fabric 1 and the second polyester nonwoven fabric 2, and is between the atoms in the first polyester nonwoven fabric and the atoms in the second polyester nonwoven fabric. The first polyester nonwoven fabric 1 and the second polyester nonwoven fabric 2 are firmly bonded to each other by forming a bond. Usually, even if polyester non-woven fabrics are laminated, hydrogen bonds and covalent bonds are not formed between the two, so that they cannot be bonded unless an adhesive is used or heat sealed. In the present invention, as described later, the surface of the first polyester nonwoven fabric 1 and / or the second polyester nonwoven fabric 2 is irradiated with an electron beam to generate radicals, and as shown in FIG. A bond is formed between an atom on the surface of the polyester nonwoven fabric 1 and an atom on the surface of the second polyester nonwoven fabric 2, or an oxygen atom between an atom on the surface of the first polyester nonwoven fabric 1 and an atom on the surface of the polyester nonwoven fabric 2 The first polyester nonwoven fabric 1 and the second polyester nonwoven fabric 2 are firmly bonded to each other without using an adhesive by forming a bond via the adhesive. Further, radicals generated by electron beam irradiation and oxygen in the air are combined, and OH groups may exist on the surface of the first polyester nonwoven fabric 1 and / or the second polyester nonwoven fabric 2, in that case The OH group on one polyester nonwoven fabric side and the OH group or ester group oxygen atom on the other polyester nonwoven fabric side may form a bond. In addition, generation of radicals by electron beam irradiation is generated by identifying free radical species existing in fibers in the nonwoven fabric after electron beam irradiation using an electron spin resonance apparatus (hereinafter also referred to as ESR). Can be confirmed.

また、電子線照射により第１のポリエステル不織布１と第２のポリエステル不織布２とを接着した積層体は、図２に示すように、上記した共有結合や水素結合等の結合が形成されているため、接着剤を全く使用しなくても、剥離を生じない積層体とすることができる。水素結合の存在の確認は、積層体を水またはアルコール溶液中に浸積して剥離の有無を確認することにより行うことができる。水素結合のみによって互いの不織布が接着している場合、積層体を水またはアルコール溶液中に浸積すると、両者の間に形成されていた水素結合が破壊されて水またはアルコールの水素原子または酸素原子と水素結合が再形成されるため、接着力がなくなり両不織布が剥離する。よって、接着が、共有結合および水素結合によるものなのか、水素結合のみによるものなのかを、確認することができる。   Moreover, since the laminated body which adhere | attached the 1st polyester nonwoven fabric 1 and the 2nd polyester nonwoven fabric 2 by electron beam irradiation as shown in FIG. 2, bonds, such as a covalent bond mentioned above and a hydrogen bond, are formed. Even if no adhesive is used, it is possible to obtain a laminate that does not peel off. The presence of hydrogen bonds can be confirmed by immersing the laminate in water or an alcohol solution and confirming the presence or absence of peeling. When the nonwoven fabrics are bonded to each other only by hydrogen bonds, when the laminate is immersed in water or an alcohol solution, the hydrogen bonds formed between the two are broken and water or alcohol hydrogen atoms or oxygen atoms are destroyed. And the hydrogen bond is re-formed, the adhesive strength is lost and the nonwoven fabrics are peeled off. Therefore, it can be confirmed whether the adhesion is due to a covalent bond and a hydrogen bond or only due to a hydrogen bond.

以下、本発明による積層体を構成する第１および第２のポリエステル不織布について、説明する。   Hereinafter, the 1st and 2nd polyester nonwoven fabric which comprises the laminated body by this invention is demonstrated.

＜ポリエステル不織布＞
本発明の積層体を構成する第１および第２のポリエステル不織布は、ポリエステル樹脂からなる繊維を不織布とすることにより得られる。ポリエステル樹脂としては、ポリエチレンテレフタレート、ポリトリメチレンテレフタレート、ポリブチレンテレフタレート、ポリエチレンナフタレート、ポリブチレンナフタレート等からなる樹脂を用いることができる。 <Polyester non-woven fabric>
The 1st and 2nd polyester nonwoven fabrics which comprise the laminated body of this invention are obtained by making the fiber which consists of polyester resins into a nonwoven fabric. As the polyester resin, a resin made of polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polybutylene naphthalate, or the like can be used.

また、本発明において用いられるポリエステル不織布としては、芯鞘構造を有する複合繊維からなる不織布であってもよく、例えば、芯がポリオレフィン樹脂やポリアミド樹脂等からなり、鞘が上記したポリエステル樹脂からなる複合繊維なども好適に使用することができる。   Further, the polyester nonwoven fabric used in the present invention may be a nonwoven fabric composed of a composite fiber having a core-sheath structure. For example, a composite composed of a core made of a polyolefin resin or a polyamide resin, and a sheath made of the above-described polyester resin. A fiber etc. can also be used conveniently.

ポリエステル不織布には、必要に応じて、光安定剤、紫外線吸収剤、酸化防止剤、充填剤、滑剤等、従来公知の各種添加剤を適宜添加することができる。光安定剤、紫外線吸収剤としては、従来公知のものを使用でき、例えば、フェノール系、リン系、ヒンダードアミン系の光吸収剤や、ベンゾトリアゾール系、ベンゾフェノン系、サリチル酸エステル系の紫外線吸収剤が使用できる。   Various conventionally known additives such as a light stabilizer, an ultraviolet absorber, an antioxidant, a filler, a lubricant and the like can be appropriately added to the polyester nonwoven fabric as necessary. Conventionally known light stabilizers and ultraviolet absorbers can be used. For example, phenol-based, phosphorus-based, hindered amine-based light absorbers, benzotriazole-based, benzophenone-based, and salicylic acid ester-based ultraviolet absorbers are used. it can.

上記した樹脂からなる繊維を不織布とするには、通常用いられているローラーカード、フラットカード等のカード機を用いて、定法によりウェッブを作製する。ウェッブからの不織布の製造は、目的とする不織布の用途等に応じて熱融着法、スパンボンド法、メルトブロー法、溶剤系によるフラッシュ紡糸法などの従来公知の方法を適宜選択して行えばよい。また、交絡させた繊維どうしを熱融着させて不織布としてもよい。ポリエステル不織布として、市販のものを使用してもよく、例えば、エルタスシリーズ（旭化成せんい株式会社製）やマリックスシリーズ（ユニチカ株式会社製）等を好適に使用することができる。   In order to make the fiber made of the above-mentioned resin into a non-woven fabric, a web is prepared by a conventional method using a card machine such as a roller card or a flat card that is usually used. The production of the nonwoven fabric from the web may be carried out by appropriately selecting a conventionally known method such as a heat fusion method, a spunbond method, a melt blow method, or a solvent-based flash spinning method according to the intended use of the nonwoven fabric. . Further, the entangled fibers may be heat-sealed to form a nonwoven fabric. As the polyester nonwoven fabric, commercially available ones may be used, and for example, Eltus series (Asahi Kasei Fibers Co., Ltd.), Marix series (Unitika Ltd.) and the like can be suitably used.

本発明においては、積層される第１および第２のポリエステル不織布の厚みは、概ね２０〜８００μｍ程度である。   In the present invention, the thickness of the laminated first and second polyester nonwoven fabrics is about 20 to 800 μm.

上記したようなポリエステル不織布どうしを重ね合わせて接着した積層体は、積層体を使用する際にも異物や残留溶剤等が滲出することがない。したがって、食品分野はいうまでもなく、医療分野で使用されている包装体、例えばシリンジ包装袋や粉末あるいは顆粒状の医薬品を充填包装するための包装体等に好適に使用することができる。また、ラミネート樹脂加工やヒートシール加工を行わないため、接着により不織布の開口部が塞がれることがないため、不織布本来の性能を低下させることもない。   The laminated body in which the above-mentioned polyester nonwoven fabrics are overlapped and bonded together does not exude foreign matter or residual solvent even when the laminated body is used. Therefore, it can be suitably used for a package used in the medical field, for example, a syringe package bag or a package for filling and packaging a powder or granular pharmaceutical product, not to mention the food field. In addition, since the laminate resin processing and heat seal processing are not performed, the opening of the nonwoven fabric is not blocked by adhesion, and the original performance of the nonwoven fabric is not deteriorated.

＜積層体の製造方法＞
次に、上記したような積層体を製造する方法を、図面を参照しながら説明する。先ず、上記した第１のポリエステル不織布１と第２のポリエステル不織布２とを準備し（図３（１））、両不織布のいずれか一方または両方の、接着しようとする部分に電子線を照射する（図３（２））。その結果、図３（３）に示すように、電子線が照射された部分のみ、第１のポリエステル不織布１と第２のポリエステル不織布２とが接着される。 <Method for producing laminate>
Next, a method for producing the laminate as described above will be described with reference to the drawings. First, the first polyester nonwoven fabric 1 and the second polyester nonwoven fabric 2 described above are prepared (FIG. 3 (1)), and either or both of the nonwoven fabrics are irradiated with an electron beam. (FIG. 3 (2)). As a result, as shown in FIG. 3 (3), the first polyester nonwoven fabric 1 and the second polyester nonwoven fabric 2 are bonded only to the portion irradiated with the electron beam.

本発明においては、不織布に電子線を照射した直後に、図４に示すようにローラー６等を用いて、重ね合わせた不織布１，２を押圧することが好ましい。不織布１，２の表面（すなわち、繊維の表面）は、図４に示すようにミクロレベルで凹凸があるため、互いの不織布を重ね合わせても互いの繊維どうしが完全に密着しておらず、両不織布の接触界面での接触面積が小さい。本発明においては、電子線を照射した直後にローラー６等で不織布１，２を押圧することにより、両不織布の接着面での接触面積が増加するため、密着性が向上する。   In the present invention, it is preferable to press the laminated nonwoven fabrics 1 and 2 using a roller 6 or the like as shown in FIG. 4 immediately after irradiating the nonwoven fabric with an electron beam. Since the surface of the nonwoven fabrics 1 and 2 (that is, the surface of the fibers) is uneven at the micro level as shown in FIG. 4, even if the nonwoven fabrics are overlapped with each other, the fibers are not in close contact with each other, The contact area at the contact interface between both nonwoven fabrics is small. In this invention, since the contact area in the adhesive surface of both nonwoven fabrics increases by pressing the nonwoven fabrics 1 and 2 with the roller 6 etc. immediately after irradiating an electron beam, adhesiveness improves.

第１のポリエステル不織布１と第２のポリエステル不織布２とを重ね合わせた後、両不織布１，２を押圧する際には、加熱しながら両不織布１，２を押圧することが好ましい。加熱しながら押圧することにより、第１のポリエステル不織布１および第２のポリエステル不織布２の柔軟性が向上し、第１のポリエステル不織布１と第２のポリエステル不織布２との界面（接着面）での接触面積をより増加させることができるため、密着性がより向上する。加熱する温度は、使用する不織布の種類にもよるが、不織布が熱変形できる温度であればよく、例えば、不織布を構成する樹脂のガラス転移温度以上に加熱することができる。例えば、ポリエステル不織布としてポリエチレンテレフタレート（ＰＥＴ）不織布を用いる場合には、加熱温度は８０〜１８０℃、好ましくは１００〜１６０℃である。加熱温度を高くしすぎると、発生したラジカルが失活してしまい、強固な結合を実現できなくなる。なお、押圧の力（接圧）を高くしてもよく、接圧を高くすることにより、加熱温度を低くすることができる。   After the first polyester nonwoven fabric 1 and the second polyester nonwoven fabric 2 are overlapped, when the both nonwoven fabrics 1 and 2 are pressed, it is preferable to press both nonwoven fabrics 1 and 2 while heating. By pressing while heating, the flexibility of the first polyester nonwoven fabric 1 and the second polyester nonwoven fabric 2 is improved, and at the interface (adhesive surface) between the first polyester nonwoven fabric 1 and the second polyester nonwoven fabric 2. Since the contact area can be further increased, the adhesion is further improved. The heating temperature may be any temperature at which the nonwoven fabric can be thermally deformed, although it depends on the type of nonwoven fabric used. For example, the heating temperature can be higher than the glass transition temperature of the resin constituting the nonwoven fabric. For example, when a polyethylene terephthalate (PET) nonwoven fabric is used as the polyester nonwoven fabric, the heating temperature is 80 to 180 ° C, preferably 100 to 160 ° C. If the heating temperature is too high, the generated radicals are deactivated, and a strong bond cannot be realized. The pressing force (contact pressure) may be increased, and the heating temperature can be lowered by increasing the contact pressure.

第１のポリエステル不織布１と第２のポリエステル不織布２とを重ね合わせて押圧するには、上記したようにヒートローラ６等を好適に使用できる。また、図４に示すように、重ね合わせた不織布がヒートローラ６と支持ローラー７との間で圧接可能となるように、ヒートローラ６と対向する位置に支持ローラー７を載置してもよい。このようにヒートローラ６と対向する位置に支持ローラー７を載置することにより、積層体（不織布１と不織布２の積層物）とヒートローラ６との接触を線接触に近づけて、ヒートローラ６からの熱により積層体に発生する変形を最小限に抑えることができる。   In order to overlap and press the first polyester nonwoven fabric 1 and the second polyester nonwoven fabric 2, the heat roller 6 or the like can be suitably used as described above. Further, as shown in FIG. 4, the support roller 7 may be placed at a position facing the heat roller 6 so that the overlapped nonwoven fabric can be pressed between the heat roller 6 and the support roller 7. . Thus, by placing the support roller 7 at a position facing the heat roller 6, the contact between the laminate (a laminate of the nonwoven fabric 1 and the nonwoven fabric 2) and the heat roller 6 is brought close to line contact, and the heat roller 6. It is possible to minimize the deformation that occurs in the laminated body due to the heat from the.

図５は、本発明による別の製造方法の実施形態を示した概略図である。第１のポリエステル不織布１と第２のポリエステル不織布２とを重ね合わせて接着する工程において、両不織布１，２をそれぞれガイドローラにより電子線照射位置３まで導き、電子線４を両不織布１，２に照射した後にヒートローラ６により両不織布１，２を押圧する工程を連続的に行うものである。それぞれの不織布１，２はロール状形態として供給されてもよい。   FIG. 5 is a schematic view showing another embodiment of the manufacturing method according to the present invention. In the step of superposing and bonding the first polyester nonwoven fabric 1 and the second polyester nonwoven fabric 2, both nonwoven fabrics 1 and 2 are guided to the electron beam irradiation position 3 by the guide rollers, respectively, and the electron beam 4 is guided to both nonwoven fabrics 1 and 2. The process of pressing both nonwoven fabrics 1 and 2 with the heat roller 6 after the irradiation is continuously performed. Each nonwoven fabric 1, 2 may be supplied in a roll form.

電子線照射装置３からそれぞれの不織布１，２に電子線４を照射する場合、厚みがより小さい方の不織布側から電子線４を照射することが好ましい。電子線は加速電圧が増加するほどその透過力も増大する性質を有しているため、何れか一方の不織布側から電子線を照射した場合に、不織布の厚さによっては、他方の不織布まで電子線が届かないことがある。その場合には、電子線の加速電圧を増加させることにより、他方の不織布の深部まで電子線を到達させることができるが、電子線エネルギーが高くなるにしたがって、不織布自体に不必要な照射が行われ劣化させてしまう。そのため、厚肉の不織布と薄肉の不織布とを重ね合わせて接着する際には、電子線エネルギーをそれほど増大させることなく、薄肉の不織布側から電子線を照射するのが好ましい。例えば、一方のポリエステル不織布の厚みが２５μｍ以下であり、他方のポリエステル不織布の厚みが５０μｍ以上である場合は、肉薄の不織布側から電子線を照射する。このような電子線照射方法を採用することにより、不織布の劣化を最小限に留めることができる。   When irradiating each non-woven fabric 1 and 2 with the electron beam 4 from the electron beam irradiation apparatus 3, it is preferable to irradiate the electron beam 4 from the non-woven fabric side having a smaller thickness. Since the electron beam has the property of increasing its transmission power as the acceleration voltage increases, depending on the thickness of the nonwoven fabric, the electron beam may reach the other nonwoven fabric when irradiated with an electron beam from either nonwoven fabric side. May not arrive. In that case, by increasing the acceleration voltage of the electron beam, the electron beam can reach the deep part of the other nonwoven fabric. However, as the electron beam energy increases, unnecessary irradiation is performed on the nonwoven fabric itself. It will deteriorate. Therefore, when a thick nonwoven fabric and a thin nonwoven fabric are laminated and bonded, it is preferable to irradiate an electron beam from the thin nonwoven fabric side without increasing the electron beam energy so much. For example, when the thickness of one polyester nonwoven fabric is 25 μm or less and the thickness of the other polyester nonwoven fabric is 50 μm or more, the electron beam is irradiated from the thin nonwoven fabric side. By adopting such an electron beam irradiation method, it is possible to minimize deterioration of the nonwoven fabric.

重ね合わせる不織布１，２が両方とも厚肉である場合には、図５に示すように両方の不織布側から電子線が照射できるように、電子線照射装置３と対向する位置に、別の電子線照射装置３’を設けてもよい。この態様によれば、不織布の厚みに応じて電子線の照射エネルギーを調整することができるため、不織布を劣化させることなく両不織布どうしを接着することができる。   When both the nonwoven fabrics 1 and 2 to be overlapped are thick, another electron is placed at a position facing the electron beam irradiation device 3 so that an electron beam can be irradiated from both nonwoven fabric sides as shown in FIG. A line irradiation device 3 ′ may be provided. According to this aspect, since the irradiation energy of an electron beam can be adjusted according to the thickness of a nonwoven fabric, both nonwoven fabrics can be adhere | attached, without degrading a nonwoven fabric.

図６は、本発明による別の製造方法の実施形態を示した概略図である。この実施態様においては、電子線の照射が、第１のポリエステル不織布１と第２のポリエステル不織布２とを重ね合わせる前に行われる。先ず、供給されてきた一対の不織布１，２は、両不織布１，２が重ね合わされる前に、電子線照射装置３（３’）により、不織布１（２）へ電子線４（４’）が照射される。図５に示した実施形態では、不織布１，２の電子線照射側と反対側の面どうしが対向するように両不織布１，２を重ね合わせたのに対し、図６に示す実施態様では、両不織布１，２の電子線照射側の面どうしが対向するように両不織布１，２を重ね合わせる点が相違している。このように、不織布１へ電子線を照射した側の面に他方の不織布２を重ね合わせることにより、不織布の厚みによらず、電子線の照射エネルギーをより小さくすることができ、その結果、不織布の電子線照射による劣化をより低減することができる。   FIG. 6 is a schematic view showing an embodiment of another manufacturing method according to the present invention. In this embodiment, the electron beam irradiation is performed before the first polyester nonwoven fabric 1 and the second polyester nonwoven fabric 2 are overlapped. First, the pair of non-woven fabrics 1 and 2 supplied to the non-woven fabric 1 (2) by the electron beam irradiation device 3 (3 ′) before the two non-woven fabrics 1 and 2 are overlapped with each other. Is irradiated. In the embodiment shown in FIG. 5, both the nonwoven fabrics 1 and 2 are overlapped so that the surfaces opposite to the electron beam irradiation side of the nonwoven fabrics 1 and 2 face each other, whereas in the embodiment shown in FIG. The difference is that the nonwoven fabrics 1 and 2 are overlapped so that the surfaces of the nonwoven fabrics 1 and 2 on the electron beam irradiation side face each other. Thus, by superimposing the other non-woven fabric 2 on the surface of the non-woven fabric 1 irradiated with the electron beam, the irradiation energy of the electron beam can be further reduced regardless of the thickness of the non-woven fabric. Degradation due to electron beam irradiation can be further reduced.

また、図６に示した実施態様においても、一対の電子線照射装置３，３’を設けて、図５に示した実施態様と同様に、第１のポリエステル不織布１および第２のポリエステル不織布２のそれぞれへ電子線４，４’を照射してもよい。これらの組み合わせにより、より不織布の劣化を少なくして接着強度を向上させることができる。   Also in the embodiment shown in FIG. 6, a pair of electron beam irradiation devices 3 and 3 ′ are provided, and the first polyester nonwoven fabric 1 and the second polyester nonwoven fabric 2 are provided similarly to the embodiment shown in FIG. 5. These may be irradiated with electron beams 4, 4 ′. By these combinations, the deterioration of the nonwoven fabric can be further reduced and the adhesive strength can be improved.

図７は、本発明による別の製造方法の実施形態を示した概略図である。この実施形態においては、第１のポリエステル不織布１および第２のポリエステル不織布２を重ね合わせてヒートローラ６により押圧した後に電子線照射を行うものである。先ず、供給されてきた一対の材料１，２は、ガイドローラに導かれて重ね合わされる。続いて、ヒートローラ６と支持ローラー７とにより両不織布１，２が押圧されるとともに、ヒートローラ６により加熱が行われる。その後、電子線照射装置３により第１のポリエステル不織布１および第２のポリエステル不織布２の表面に電子線４が照射されて両者１，２の接着が連続的に行われる。また、図７に示した実施形態においても、一対の電子線照射装置３，３’を設けて、図５及び６に示した実施態様と同様に両方の材料１，２へそれぞれ電子線４，４’を照射してもよい。これらの組み合わせにより、より不織布の劣化を少なくして接着強度を向上させることができる。   FIG. 7 is a schematic view showing another embodiment of the manufacturing method according to the present invention. In this embodiment, electron beam irradiation is performed after the first polyester nonwoven fabric 1 and the second polyester nonwoven fabric 2 are overlapped and pressed by the heat roller 6. First, the pair of supplied materials 1 and 2 are led to a guide roller and overlapped. Subsequently, both the nonwoven fabrics 1 and 2 are pressed by the heat roller 6 and the support roller 7, and heating is performed by the heat roller 6. Then, the electron beam 4 is irradiated to the surface of the 1st polyester nonwoven fabric 1 and the 2nd polyester nonwoven fabric 2 with the electron beam irradiation apparatus 3, and adhesion | attachment of both 1 and 2 is performed continuously. Also in the embodiment shown in FIG. 7, a pair of electron beam irradiation devices 3 and 3 ′ are provided, and the electron beams 4 and 4 are respectively applied to both materials 1 and 2 in the same manner as the embodiment shown in FIGS. 5 and 6. 4 'may be irradiated. By these combinations, the deterioration of the nonwoven fabric can be further reduced and the adhesive strength can be improved.

電子線の照射エネルギーは、上記したように不織布厚み等に応じて適宜調整する必要がある。本発明においては、２０〜７５０ｋＶ、好ましくは２５〜４００ｋＶ、より好ましくは３０〜３００ｋＶ程度の照射エネルギー範囲で電子線を照射するが、より低い照射エネルギーとすることが好ましく、４０〜２００ｋＶとすることができる。このように低い照射エネルギーとすることにより、不織布の劣化を抑制できるだけでなく、不織布表面のラジカル発生がより効率的におこるため、より強固な結合を実現することができる。また、電子線の吸収線量は、１０〜８００ｋＧｙ、好ましくは２５〜６００ｋＧｙの範囲で行う。   The irradiation energy of the electron beam needs to be appropriately adjusted according to the thickness of the nonwoven fabric as described above. In the present invention, the electron beam is irradiated in an irradiation energy range of about 20 to 750 kV, preferably 25 to 400 kV, and more preferably about 30 to 300 kV. However, the irradiation energy is preferably lower, and 40 to 200 kV. Can do. By setting the irradiation energy to be low in this way, not only the deterioration of the nonwoven fabric can be suppressed, but also the radical generation on the surface of the nonwoven fabric can be performed more efficiently, so that a stronger bond can be realized. The absorbed dose of the electron beam is 10 to 800 kGy, preferably 25 to 600 kGy.

このような電子線照射装置としては、従来公知のものを使用でき、例えばカーテン型電子照射装置（ＬＢ１０２３、株式会社アイ・エレクトロンビーム社製）やライン照射型低エネルギー電子線照射装置（ＥＢ−ＥＮＧＩＮＥ、浜松ホトニクス株式会社製）等を好適に使用することができる。   As such an electron beam irradiation apparatus, conventionally known ones can be used. For example, a curtain type electron irradiation apparatus (LB1023, manufactured by I. Electron Beam Co., Ltd.) or a line irradiation type low energy electron beam irradiation apparatus (EB-ENGINE). , Manufactured by Hamamatsu Photonics Co., Ltd.) can be preferably used.

電子線を照射する際には、酸素濃度を１００ｐｐｍ以下とすることが好ましい。酸素存在下で電子線を照射するとオゾンが発生するため環境に悪影響を及ぼす場合があるからである。酸素濃度を１００ｐｐｍ以下とするには、真空下または窒素やアルゴン等の不活性ガス雰囲気下において、不織布に電子線を照射すればよく、例えば、電子線照射装置内を窒素充填することにより、酸素濃度１００ｐｐｍ以下を達成することができる。   When irradiating with an electron beam, the oxygen concentration is preferably 100 ppm or less. This is because irradiation with an electron beam in the presence of oxygen generates ozone and may adversely affect the environment. In order to set the oxygen concentration to 100 ppm or less, the nonwoven fabric may be irradiated with an electron beam under vacuum or an inert gas atmosphere such as nitrogen or argon. For example, by filling the electron beam irradiation apparatus with nitrogen, A concentration of 100 ppm or less can be achieved.

上記した接着方法によって得られた、ポリエステル不織布どうしを積層した積層体は、従来のラミネート樹脂を用いて接着した場合と同等またはそれ以上の接着強度を実現できる。また、ラミネート樹脂等を全く用いていないため、積層体を使用する際にも異物や残留溶剤等が滲出することがなく、かつ、光遮光性やガス非透過性にも優れるものとなる。   A laminated body obtained by laminating polyester nonwoven fabrics obtained by the above-described adhesion method can realize an adhesive strength equal to or higher than that obtained by using a conventional laminate resin. In addition, since no laminate resin or the like is used, foreign matter, residual solvent, and the like do not ooze out when the laminate is used, and light shielding properties and gas non-permeability are excellent.

＜ポリエステル不織布の準備＞
ポリエステル不織布織布として、下記の３種類の不織布を準備した。
Ａ：厚さ９０μｍのポリエステル不織布不織布（エルタス Ｅ０５０２０、旭化成せんい株式会社製）
Ｂ：厚さ１２０μｍのポリエステル不織布不織布（エルタス Ｅ０５０１２、旭化成せんい株式会社製）
Ｃ：厚さ１４０μｍのポリエステル不織布不織布（マリックス ７０２００ＷＳＯ、ユニチカ株式会社製） <Preparation of polyester nonwoven fabric>
The following three types of nonwoven fabrics were prepared as polyester nonwoven fabrics.
A: 90 μm thick non-woven polyester nonwoven fabric (ELTAS E05020, manufactured by Asahi Kasei Fibers Co., Ltd.)
B: 120 μm thick polyester nonwoven fabric (Eltas E05012, manufactured by Asahi Kasei Fibers)
C: 140 μm thick polyester nonwoven fabric (Marix 70200 WSO, manufactured by Unitika Ltd.)

実施例１
＜積層体の作製＞
上記したＡおよびＢのポリエステル不織布を、それぞれ１５０ｍｍ×７５ｍｍの大きさに切り出した試料を準備し、電子線照射装置（ライン照射型低エネルギー電子線照射装置ＥＥＳ−Ｌ−ＤＰ０１、浜松ホトニクス株式会社製）のサンプル台に並置した。この際、電子線が試料に照射されない部分を設けるために、両試料の一方の端部５〜１０ｍｍ程度にマスキングしておいた。 Example 1
<Production of laminate>
Samples prepared by cutting the above-described polyester nonwoven fabrics A and B into a size of 150 mm × 75 mm were prepared, and an electron beam irradiation device (line irradiation type low energy electron beam irradiation device EES-L-DP01, manufactured by Hamamatsu Photonics Co., Ltd.). ) On the sample stage. At this time, in order to provide a portion where the sample is not irradiated with the electron beam, masking is performed on one end portion of both samples of about 5 to 10 mm.

次いで、電子照射線装置のチャンバー内の酸素濃度が１００ｐｐｍ以下となるように窒素ガスでパージした後、下記の電子線照射条件により、試料の表面に電子線を照射した。
電圧：４０ｋＶ
吸収線量：２００ｋＧｙ
装置内酸素濃度：１００ｐｐｍ以下 Next, after purging with nitrogen gas so that the oxygen concentration in the chamber of the electron irradiation apparatus becomes 100 ppm or less, the surface of the sample was irradiated with an electron beam under the following electron beam irradiation conditions.
Voltage: 40 kV
Absorbed dose: 200kGy
In-device oxygen concentration: 100 ppm or less

電子線を照射した後、試料を装置内から取り出し、すぐに両不織布の電子線照射面側が対向するようにして重ね合わせ、熱ラミネート法により、両不織布を接着して積層体を得た。   After irradiating the electron beam, the sample was taken out from the apparatus and immediately laminated so that the electron beam irradiation surface sides of both nonwoven fabrics were opposed to each other, and both nonwoven fabrics were bonded by a thermal laminating method to obtain a laminate.

実施例２
使用する樹脂不織布を下記の表１に示す組み合わせとし、また、表１に示す電子線照射条件とした以外は実施例１と同様にして積層体を得た。 Example 2
A laminate was obtained in the same manner as in Example 1 except that the resin nonwoven fabric used was a combination shown in Table 1 below and the electron beam irradiation conditions shown in Table 1 were used.

比較例１
電子照射を行わなかった以外は実施例１と同様にして積層体を得た。しかしながら、得られた積層体はポリエステル不織布どうしが接着していなかった。 Comparative Example 1
A laminate was obtained in the same manner as in Example 1 except that electron irradiation was not performed. However, in the obtained laminate, the polyester nonwoven fabrics were not bonded to each other.

＜積層体の接着強度の評価＞
得られた積層体を幅１５ｍｍの短冊状になるように切り出し、引張試験機（テンシロン万能材料試験機ＲＴＣ−１３１０Ａ、ＯＲＩＥＮＴＥＣ社製）を用いて、５０ｍｍ／分の速度で、９０度剥離試験を行った。なお、上記したように比較例の積層体は、ポリエステル不織布どうしが接着しておらず、積層体の接着強度を測定することができなかった。評価結果は、下記の表１に示される通りであった。 <Evaluation of adhesive strength of laminate>
The obtained laminate was cut into a strip shape with a width of 15 mm, and a 90 ° peel test was performed at a rate of 50 mm / min using a tensile tester (Tensilon Universal Material Tester RTC-1310A, manufactured by ORIENTEC). went. In addition, as above-mentioned, as for the laminated body of the comparative example, the polyester nonwoven fabric was not adhere | attached, but the adhesive strength of the laminated body was not able to be measured. The evaluation results were as shown in Table 1 below.

また、実施例１および２の積層体の接着が共有結合によるものかどうかと間接的に調べるために、得られた積層体を水中で保管し、その後、上記と同様にして積層体の接着強度を測定した。評価結果は、下記の表１に示される通りであった。   In addition, in order to indirectly check whether the adhesion of the laminates of Examples 1 and 2 is due to covalent bonds, the obtained laminates were stored in water, and then the adhesion strength of the laminates in the same manner as described above. Was measured. The evaluation results were as shown in Table 1 below.

Figure 2012158054
Figure 2012158054

表１の評価結果からも明らかなように、実施例１および２の積層体は、水中保管後も、空気中で測定した接着強度と同様の接着強度を有している。この結果から、実施例１および２の積層体は、ポリエステル不織布どうしが水素結合や分子間力のみによって接着しているものではないことがわかる。したがって、間接的にではあるが、２種のポリエステル不織布中の原子との間で共有結合が形成されていると推認できた。   As is clear from the evaluation results in Table 1, the laminates of Examples 1 and 2 have the same adhesive strength as that measured in air even after storage in water. From this result, it can be seen that in the laminates of Examples 1 and 2, the polyester nonwoven fabrics are not bonded only by hydrogen bonds or intermolecular forces. Therefore, although indirectly, it was inferred that a covalent bond was formed between the atoms in the two types of polyester nonwoven fabric.

１ 第１のポリエステル不織布
２ 第２のポリエステル不織布
３、３’ 電子線照射装置
４、４’ 電子線
５ 不織布基材接触界面
６ ヒートローラ
７ 支持ローラー DESCRIPTION OF SYMBOLS 1 1st polyester nonwoven fabric 2 2nd polyester nonwoven fabric 3, 3 'electron beam irradiation apparatus 4, 4' electron beam 5 Nonwoven fabric base material contact interface 6 Heat roller 7 Support roller

Claims (7)

第１のポリエステル不織布と第２のポリエステル不織布とが積層した積層体であって、
前記第１のポリエステル不織布および前記第２のポリエステル不織布の少なくとも一部で、前記第１のポリエステル不織布中の原子と、前記第２のポリエステル不織布中の原子との間に結合が形成されており、前記第１のポリエステル不織布および前記第２のポリエステル不織布とが接着剤を介さずに接着されていることを特徴とする、積層体。 A laminate in which a first polyester nonwoven fabric and a second polyester nonwoven fabric are laminated,
In at least a part of the first polyester nonwoven fabric and the second polyester nonwoven fabric, a bond is formed between an atom in the first polyester nonwoven fabric and an atom in the second polyester nonwoven fabric, The first polyester nonwoven fabric and the second polyester nonwoven fabric are bonded to each other without using an adhesive. 前記第１のポリエステル不織布および第２のポリエステル不織布中の原子に酸素原子または水酸基が結合しており、前記第１のポリエステル不織布中の酸素原子および／または水酸基と、前記第２のポリエステル不織布中の酸素原子または水酸基との間で結合が形成されている、請求項１に記載の積層体。   An oxygen atom or a hydroxyl group is bonded to an atom in the first polyester nonwoven fabric and the second polyester nonwoven fabric, and an oxygen atom and / or a hydroxyl group in the first polyester nonwoven fabric and in the second polyester nonwoven fabric The laminate according to claim 1, wherein a bond is formed between an oxygen atom or a hydroxyl group. 前記第１および第２のポリエステル不織布が、ポリエチレンテレフタレート、ポリトリメチレンテレフタレート、ポリブチレンテレフタレート、ポリエチレンナフタレート、もしくはポリブチレンナフタレートからなる繊維、または、これら樹脂を鞘とする複合繊維からなる、請求項１または２に記載の積層体。   The first and second polyester nonwoven fabrics are composed of fibers made of polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, or polybutylene naphthalate, or a composite fiber having these resins as sheaths. Item 3. A laminate according to item 1 or 2. 請求項１〜３のいずれか一項に記載の、第１のポリエステル不織布と第２のポリエステル不織布とが積層した積層体を製造する方法であって、
前記第１のポリエステル不織布および／または前記第２のポリエステル不織布の少なくとも一方の面に電子線を照射し、
前記電子線が照射された前記第１のポリエステル不織布面および／または第２のポリエステル不織布面を重ね合わせて接着する、ことを含んでなることを特徴とする、方法。 A method for producing a laminate in which the first polyester nonwoven fabric and the second polyester nonwoven fabric according to any one of claims 1 to 3 are laminated,
Irradiating at least one surface of the first polyester nonwoven fabric and / or the second polyester nonwoven fabric with an electron beam;
A method comprising overlaying and bonding the first polyester nonwoven fabric surface and / or the second polyester nonwoven fabric surface irradiated with the electron beam. 前記第１のポリエステル不織布と第２のポリエステル不織布とを重ね合わせる前および／または重ね合わせた後に電子線照射を行う、請求項４に記載の方法。   The method of Claim 4 which performs electron beam irradiation before superimposing the 1st polyester nonwoven fabric and the 2nd polyester nonwoven fabric, and / or after superimposing. 前記接着を加圧して行う、請求項４または５に記載の方法。   The method according to claim 4 or 5, wherein the adhesion is performed under pressure. 前記接着を加熱して行う、請求項４〜６のいずれか一項に記載の方法。   The method according to claim 4, wherein the bonding is performed by heating.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61146878A (en) * 1984-12-14 1986-07-04 平岡織染株式会社 Production of laminated sheet
JP2003062946A (en) * 2001-08-13 2003-03-05 Three M Innovative Properties Co Multilayered laminate bonded by irradiation with electron beam and method for manufacturing the same
JP2004268383A (en) * 2003-03-07 2004-09-30 Kuraray Co Ltd Plastic bonding method
JP2005168999A (en) * 2003-12-15 2005-06-30 Nishikawa Living Inc Fiber laminate
JP2010076141A (en) * 2008-09-24 2010-04-08 Tokai Univ Method for manufacturing different kind of thermoplastic resin molded body and the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61146878A (en) * 1984-12-14 1986-07-04 平岡織染株式会社 Production of laminated sheet
JP2003062946A (en) * 2001-08-13 2003-03-05 Three M Innovative Properties Co Multilayered laminate bonded by irradiation with electron beam and method for manufacturing the same
JP2004268383A (en) * 2003-03-07 2004-09-30 Kuraray Co Ltd Plastic bonding method
JP2005168999A (en) * 2003-12-15 2005-06-30 Nishikawa Living Inc Fiber laminate
JP2010076141A (en) * 2008-09-24 2010-04-08 Tokai Univ Method for manufacturing different kind of thermoplastic resin molded body and the same

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