JP2948647B2 - Film bonding method, bonding film and endless film obtained thereby - Google Patents

Film bonding method, bonding film and endless film obtained thereby

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Publication number
JP2948647B2
JP2948647B2 JP2268626A JP26862690A JP2948647B2 JP 2948647 B2 JP2948647 B2 JP 2948647B2 JP 2268626 A JP2268626 A JP 2268626A JP 26862690 A JP26862690 A JP 26862690A JP 2948647 B2 JP2948647 B2 JP 2948647B2
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Japan
Prior art keywords
film
fusing
ultrasonic
bonding
applying
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Expired - Lifetime
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JP2268626A
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Japanese (ja)
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JPH04144735A (en
Inventor
勝彦 大谷
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Individual
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Individual
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Priority to JP2268626A priority Critical patent/JP2948647B2/en
Publication of JPH04144735A publication Critical patent/JPH04144735A/en
Application granted granted Critical
Publication of JP2948647B2 publication Critical patent/JP2948647B2/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5042—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like covering both elements to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B29C65/083—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil
    • B29C65/086—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil using a rotary anvil
    • 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
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B29C65/7443—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc by means of ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C66/03—After-treatments in the joint area
    • B29C66/032—Mechanical after-treatments
    • B29C66/0324—Reforming or reshaping the joint, e.g. folding over
    • B29C66/03241—Flattening
    • B29C66/03242—Flattening of sheets being positioned in abutment, e.g. after folding open of an overlap 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
    • 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
    • B29C66/01—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
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt 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
    • B29C66/01—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
    • B29C66/116—Single bevelled joints, i.e. one of the parts to be joined being bevelled in the joint area
    • B29C66/1162—Single bevel to bevel joints, e.g. mitre 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
    • B29C66/01—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
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/137—Beaded-edge joints or bead seals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C66/737—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 state of the material of the parts to be joined
    • B29C66/7371—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 state of the material of the parts to be joined oriented or heat-shrinkable
    • B29C66/73711—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 state of the material of the parts to be joined oriented or heat-shrinkable oriented
    • B29C66/73713—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 state of the material of the parts to be joined oriented or heat-shrinkable oriented bi-axially or multi-axially
    • 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
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81415—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled
    • 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
    • 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
    • B29C66/80—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
    • B29C66/8362—Rollers, cylinders or drums moving relative to and tangentially to 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
    • B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
    • B29C65/4815—Hot melt adhesives, e.g. thermoplastic adhesives
    • 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
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/005—Oriented
    • B29K2995/0053—Oriented bi-axially

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はフィルムの接合方法に関し、特に広幅な二軸
延伸熱可塑性樹脂フィルムの場合においても、極めて平
坦な接合部が得られるフィルムの接合方法に関する。さ
らに本発明は、このような接合方法により得られる接合
フィルム及びエンドレスフィルムに関する。Description: FIELD OF THE INVENTION The present invention relates to a method for bonding a film, and particularly to a method for bonding a film capable of obtaining an extremely flat bonded portion even in the case of a wide biaxially stretched thermoplastic resin film. About. Further, the present invention relates to a bonding film and an endless film obtained by such a bonding method.

〔従来の技術及び発明が解決しようとする課題〕[Problems to be solved by conventional technology and invention]

一般に、熱可塑性樹脂フィルムは熱エネルギーにより
溶融するので、押圧した状態で熱エネルギーを与えれば
容易に接合することができる。ところが、ポリエチレン
テレフタレートフィルムのように熱融着性のないフィル
ムの場合、上記方法では満足に接合できない。そこで、
接合部に押圧力下で超音波振動を与えて接合する方法が
行われている。In general, a thermoplastic resin film is melted by thermal energy, and thus can be easily joined by applying thermal energy in a pressed state. However, in the case of a film having no heat-sealing property, such as a polyethylene terephthalate film, the above method cannot be used for satisfactory bonding. Therefore,
A method has been performed in which ultrasonic vibration is applied to a joint under a pressing force to join the joint.

超音波振動を利用して接合するための一般的な装置
は、超音波発振器、それに固定されたホーン、ホーンと
対向する位置に配置され、ホーンとの間でフィルムを挟
圧するためのベース台、及びホーンに押圧力を与える装
置等により構成されている。熱可塑性樹脂フィルムの接
合部は、超音波ホーンとベース台とに挟持されて押圧下
超音波振動を受けるので、熱融着性（ヒートシール性）
がなくても容易に溶着することができる。A general device for bonding using ultrasonic vibration is an ultrasonic oscillator, a horn fixed to the ultrasonic oscillator, a base pedestal that is disposed at a position facing the horn, and presses the film between the horn and the horn, And a device for applying a pressing force to the horn. Since the joint of the thermoplastic resin film is sandwiched between the ultrasonic horn and the base table and receives ultrasonic vibrations under pressure, it has a heat-sealing property (heat sealing property).
Can be easily welded even without any.

このような超音波による熱可塑性樹脂フィルムの接合
は、一般に第６図に示すような方法により行うことがで
きる。この場合、熱可塑性樹脂フィルム61、61の両端部
分62と63を重ね合わせて、超音波ホーン64とベース台65
で挟持し、押圧下超音波溶着する。この方法では、フィ
ルム両端部分62と63は強固に接合したように見えるが、
実際はそれらの接触面66のみが溶着しているだけである
ので、斜め方向の力やねじれ力が加えられると、簡単に
剥離してしまうという問題がある。その上、重ね合わせ
により接合部が肉厚となり、接合されたフィルムの平坦
度が悪い。The bonding of the thermoplastic resin films by such ultrasonic waves can be generally performed by a method as shown in FIG. In this case, both ends 62 and 63 of the thermoplastic resin films 61 and 61 are overlapped, and the ultrasonic horn 64 and the base 65
And ultrasonic welding under pressure. With this method, the film ends 62 and 63 appear to be firmly joined,
Actually, only the contact surfaces 66 are simply welded, so that there is a problem that if a diagonal force or a torsional force is applied, the contact surfaces 66 are easily separated. In addition, the joining portion becomes thick due to the superposition, and the flatness of the joined film is poor.

このために、第７図に示すような接合方法が考えられ
る。この接合方法においては、斜めに切断された両端部
分72、73は若干ずらして重ね合わされ、超音波ホーン74
とベース台75に挟持される。このため溶着されたフィル
ム接合部の平坦度は向上する。しかしながら、熱可塑性
樹脂フィルム71、71の両端部分72、73を精度よく斜めに
切断することは極めて難しい。その上、両端部分72、73
の切断面を、正確な接合しろができるように重ね合わさ
なければならないが、それも実際は極めて難しい。この
ように第７図に示す接合方法は実際的ではない。For this purpose, a joining method as shown in FIG. 7 can be considered. In this joining method, both end portions 72 and 73 cut obliquely are overlapped with a slight shift, and an ultrasonic horn 74 is provided.
And the base stand 75. Therefore, the flatness of the welded film joint is improved. However, it is extremely difficult to accurately and obliquely cut both end portions 72, 73 of the thermoplastic resin films 71, 71. In addition, both ends 72, 73
Must be overlapped so that a precise joining margin can be obtained, which is also extremely difficult in practice. Thus, the joining method shown in FIG. 7 is not practical.

一方、第８図に示す接合方法も考えられる。この方法
では、熱可塑性樹脂フィルム81、81の両端部82、83の端
面をつき合わせた状態で同じ熱可塑性樹脂の補強シート
86を付着し、ベース台85に載置して、超音波ホーン84と
ベース台85とにより超音波溶着を行う。この方法によれ
ば、フィルム81の端部82、83及び補強シート86の各接触
面が溶着され、かつ接合したフィルム表面の平坦度も良
好である。しかし、フィルム81の両端部82、83は単につ
き合わされているだけであるので、やはり斜め方向又は
ねじれ方向の力に対して弱く、剥離しやすい。その上、
補強シート86の分だけ、接合部の肉厚が増大するという
問題もある。On the other hand, a joining method shown in FIG. 8 is also conceivable. In this method, a reinforcing sheet of the same thermoplastic resin is used in a state where the end faces of both ends 82 and 83 of the thermoplastic resin films 81 and 81 are put together.
The ultrasonic horn 84 and the base pedestal 85 perform ultrasonic welding. According to this method, the contact surfaces of the end portions 82 and 83 of the film 81 and the reinforcing sheet 86 are welded, and the flatness of the joined film surface is also good. However, since both ends 82 and 83 of the film 81 are merely joined together, they are also weak against a diagonal or torsional force and easily peeled off. Moreover,
There is also a problem that the thickness of the joint increases due to the reinforcing sheet 86.

このように、第６図〜第７図に示すようなフィルム接
合方法は、いずれも溶着強度及び接合精度等において満
足ではなく、かつフィルム接合部も平坦にはならないと
いう欠点を有する。As described above, any of the film joining methods as shown in FIGS. 6 and 7 has disadvantages in that the welding strength and the joining accuracy are not satisfactory, and the film joining portion is not flat.

従って、本発明の目的は、溶着強度及び精度が充分で
かつ平坦度が良好な接合部を与えることができる熱可塑
性樹脂フィルムの接合方法を提供することである。Accordingly, an object of the present invention is to provide a method for joining thermoplastic resin films, which can provide a joint having sufficient welding strength and accuracy and good flatness.

本発明のもう１つの目的は、このような接合方法によ
り得られる接合フィルム及びエンドレスフィルムを提供
することである。Another object of the present invention is to provide a bonding film and an endless film obtained by such a bonding method.

〔課題を解決するための手段〕[Means for solving the problem]

前記目的を達成するために鋭意研究の結果、本発明者
は、熱可塑性樹脂フィルムの端部分をはり合わせて超音
波溶断を行い、得られた溶断部を広げた状態で押圧しな
がら超音波エネルギーを与えることにより、溶着強度が
充分で良好な平坦度を有する接合部を極めて精度よく得
ることができることを発見し、本発明に想到した。As a result of diligent research to achieve the above object, the present inventor performed ultrasonic fusing by bonding the end portions of the thermoplastic resin film, and applying ultrasonic energy while pressing the obtained fusing portion in a spread state. , It has been found that a joint having sufficient welding strength and good flatness can be obtained with high accuracy, and the present invention has been made.

すなわち、本発明のフィルム接合方法は、フィルム端
部分を重ね合わせて超音波溶断する工程１と、得られた
溶断部を広げ、押圧しながら超音波エネルギーを与える
ことにより、前記溶断部を平坦化する工程２とからなる
ことを特徴とする。That is, in the film bonding method of the present invention, the fusing section is flattened by applying ultrasonic energy while expanding and pressing the obtained fusing section by ultrasonically fusing the film end portions with each other. And step 2.

また、本発明の接合フィルムは、端部分を重ね合わせ
て超音波溶断し、得られた溶断部を広げ、押圧しながら
超音波エネルギーを与えることにより前記溶断部を平坦
化してなるもので、接合部の肉厚がフィルムの他の部分
と実質的にに異ならないことを特徴とする。Further, the bonding film of the present invention is formed by superposing the end portions and ultrasonically fusing, expanding the obtained fusing portion, flattening the fusing portion by applying ultrasonic energy while pressing, and bonding. The thickness of the portion is not substantially different from other portions of the film.

また、本発明のエンドレスフィルムは、所定の幅を有
するフィルムの端部分に超音波溶断により溶断部を形成
し、それを開いた状態で超音波エネルギーを与えて平坦
化してなるもので、接合部の肉厚がフィルムの他の部分
と実質的に異ならないことを特徴とする。Further, the endless film of the present invention is formed by forming a fusing portion by ultrasonic fusing at an end portion of a film having a predetermined width, and applying ultrasonic energy in a state where the fusing portion is opened, and flattening the end portion. Is characterized in that its thickness is not substantially different from other portions of the film.

〔実施例及び作用〕(Examples and actions)

本発明のフィルムの接合方法を、１枚のフィルムの両
端を接合してエンドレスフィルムを作製する場合を例に
とり、添付図面を参照して説明する。The film joining method of the present invention will be described with reference to the accompanying drawings, taking as an example a case where both ends of one film are joined to produce an endless film.

本発明のフィルムの接合方法においては、熱可塑性樹
脂フィルムの両端部分を超音波により溶断する工程１
と、溶断部を広げた状態で押圧しながら超音波エネルギ
ーを与えて平坦化する工程２とからなる。以下、工程１
及び工程２について詳細に説明する。In the film joining method of the present invention, the step 1 of fusing both ends of the thermoplastic resin film by ultrasonic waves.
And flattening by applying ultrasonic energy while pressing while the fusing portion is expanded. Hereinafter, step 1
And Step 2 will be described in detail.

工程１ 第１図において、フィルム１を超音波溶断する装置２
は、超音波発振器（図示せず）に固定された超音波ホー
ン４、超音波ホーン４の下面にほぼ接触するように位置
するローレット５、フィルム１を載置する治具６、フィ
ルム１を治具６上に固定するためのクリップ７とを有す
る。治具６は、ベース９上を直線的に移動する車輪10及
び治具６の横方向のずれを防止するガイド（図示せず）
を有する。なお車輪10は、歯車であってもよい。また車
輪10及びガイド以外の手段であっても、治具６をフィル
ム接合方向に移動させることができるものであれば、何
でも使用することができる。Step 1 In FIG. 1, an apparatus 2 for ultrasonically fusing the film 1
Is an ultrasonic horn 4 fixed to an ultrasonic oscillator (not shown), a knurl 5 positioned so as to substantially contact the lower surface of the ultrasonic horn 4, a jig 6 for placing the film 1, and a film 1 And a clip 7 for fixing on the tool 6. The jig 6 is a guide (not shown) that prevents the wheels 10 moving linearly on the base 9 and the jig 6 from shifting in the lateral direction.
Having. Note that the wheel 10 may be a gear. Any means other than the wheel 10 and the guide can be used as long as the jig 6 can be moved in the film joining direction.

前記フィルム載置用治具６は、スリット状の開口部11
を有し、この開口部11において、フィルム１は、前記超
音波ホーン４とローレット５とにより挟持される。The film mounting jig 6 has a slit-shaped opening 11.
In the opening 11, the film 1 is sandwiched between the ultrasonic horn 4 and the knurl 5.

超音波ホーン４の先端部はテーパ状のペンシル型であ
り、また、ローレット５は、フィルム１と平行な軸5aを
有し、本実施例ではその断面は台形状をなしている。The tip of the ultrasonic horn 4 is a tapered pencil type, and the knurl 5 has an axis 5a parallel to the film 1, and its cross section is trapezoidal in this embodiment.

このような超音波溶断装置２において、フィルム１
を、まず端部を正確にそろえた状態で、治具６にクリッ
プ７により固定する。次に、治具６のスリット状開口部
11の位置において、フィルム１を、超音波ホーン４の先
端部とローレット５の長径エッジ部との間に挟持する。
この状態で押圧しながら超音波振動をかけると、超音波
エネルギーによりフィルム１は溶融し、ローレット５の
エッジ部が食い込み、最終的にフィルム１は溶断され
る。この際フィルム１は、車輪10により直線的に移動す
るので、フィルム端部から一定の距離をおいた位置で直
線的に溶断されることになる。その結果、周長が一定な
エンドレスフィルムが得られる。In such an ultrasonic fusing apparatus 2, the film 1
Is fixed to the jig 6 with the clip 7 in a state where the ends are accurately aligned. Next, the slit-shaped opening of the jig 6
At the position 11, the film 1 is sandwiched between the tip of the ultrasonic horn 4 and the long diameter edge of the knurl 5.
When ultrasonic vibration is applied while pressing in this state, the film 1 is melted by the ultrasonic energy, the edge portion of the knurl 5 bites, and the film 1 is finally blown. At this time, the film 1 is linearly moved by the wheels 10, so that the film 1 is linearly blown at a position at a certain distance from the end of the film. As a result, an endless film having a constant circumference is obtained.

なお、ローレット５のエッジ部は鋭く図示されている
が、先端に多少丸みがあっても、充分な押圧力及び超音
波エネルギーを与えれば溶断することができる。またロ
ーレットの形状も図示のものに限られず、円形状のもの
でもよい。Although the edge portion of the knurl 5 is sharply illustrated, the knurl 5 can be blown even if the tip is slightly rounded by applying a sufficient pressing force and ultrasonic energy. Further, the shape of the knurl is not limited to the illustrated one, but may be a circular shape.

溶断に必要な押圧力及び超音波エネルギーは、フィル
ム１の材質、厚さ、溶断スピード等を考慮して、適宜決
めることができる。The pressing force and ultrasonic energy required for fusing can be appropriately determined in consideration of the material, thickness, fusing speed, and the like of the film 1.

第２図は、このようにして得られるフィルム１の溶断
部の拡大断面図である。溶断部21は全体的に溶融した状
態で切断されてなるものであり、その先端の断面は、溶
断条件により、（ａ）に示すような丸まったものや、
（ｂ）に示すように小さく尖ったもの等がある。いずれ
の場合も、後の工程２により平坦化することができる。FIG. 2 is an enlarged sectional view of the fusing portion of the film 1 thus obtained. The fusing portion 21 is cut in a state of being entirely melted, and the cross section at the tip thereof is rounded as shown in FIG.
As shown in (b), there are small and sharp ones. In any case, planarization can be performed in Step 2 described later.

なお、本実施例においては、超音波ホーン４が固定さ
れ、フィルム１を固定した治具６が移動するが、反対に
治具６を固定して、超音波ホーン４とローレット５を同
時に直線的に移動する構成としてもよい。In this embodiment, the ultrasonic horn 4 is fixed, and the jig 6 to which the film 1 is fixed moves. On the contrary, the jig 6 is fixed, and the ultrasonic horn 4 and the knurl 5 are simultaneously linearly moved. It is good also as composition which moves to.

工程２ 第４図に示すように、フィルム１の溶着部を平坦化す
る装置３は、超音波発振器（図示せず）に固定された超
音波ホーン43、及びベース台45を有する。超音波ホーン
43は、第５図に示すように、フィルム幅方向に長い形状
で、フィルム全幅をカバーするものが好ましい。幅広の
ホーン43により、一度に平坦化が行え、かつ均一な押圧
により平坦度が向上する。またベース台45は、溶断部21
が平坦化されるのに充分な平坦度を有するものであれば
よく、平板に限らずローラ状のものでもよい。Step 2 As shown in FIG. 4, the apparatus 3 for flattening the welded portion of the film 1 has an ultrasonic horn 43 fixed to an ultrasonic oscillator (not shown), and a base table 45. Ultrasonic horn
As shown in FIG. 5, 43 is preferably long in the film width direction and covers the entire width of the film. The wide horn 43 enables flattening at once, and improves the flatness by uniform pressing. Also, the base table 45 is
Any material may be used as long as it has a sufficient degree of flatness to be flattened.

フィルムの溶着部21は、第２図に示すように、フィル
ム１がほぼ平行となるように接合しているので、その部
分を広げてベース台45上に載置する。すると、フィルム
１はほぼへの字状に開かれた状態になる。への字状の溶
着部21を超音波ホーン43により押圧しながら、超音波振
動を与える。すると、溶着部21は超音波エネルギーを受
けて軟化溶融し、最終的には平坦となる。この際、第２
図に示すように、溶断部21に余分な肉がついてない（溶
断により除去されている）ので、平坦化された場合、良
好な平坦度が得られる。As shown in FIG. 2, the film welded portion 21 is joined so that the film 1 is substantially parallel, so that the portion is spread and placed on the base table 45. Then, the film 1 is opened in a substantially U-shape. The ultrasonic vibration is applied while pressing the welded portion 21 having a U-shape with the ultrasonic horn 43. Then, the welded portion 21 receives the ultrasonic energy and is softened and melted, and finally becomes flat. At this time, the second
As shown in the figure, since no excess meat is attached to the fusing portion 21 (removed by fusing), good flatness can be obtained when flattened.

このようにして得られるエンドレスフィルムの接合部
は極めて良好な平坦度を有するので、エンドレスフィル
ムは完全にシームレスエンドレスフィルムとして使用す
ることができる。また、一旦完全に溶融した溶断部21を
広げて平坦化しているので大きな張力がかかっても、ま
た斜め方向やねじれ方向の力がかかっても、切断したり
することはない。The endless film joint obtained in this way has a very good flatness, so that the endless film can be used completely as a seamless endless film. Further, since the melted portion 21 that has been completely melted is spread and flattened, it is not cut even when a large tension is applied or when a force in an oblique direction or a twist direction is applied.

本発明は、全ての熱可塑性樹脂フィルムに適用可能で
あるが、特に、加熱融着が困難な熱可塑性樹脂フィルム
に好適である。このような熱可塑性樹脂フィルムとし
て、ポリエステル類、ポリフッ化ビニリデン、PEEK（ポ
リエーテルエーテルケトン）等が挙げられる。なお、加
熱融着できるポリエチレンやポリ塩化ビニル等であって
も、本発明の接合方法を適用し得るのは勿論である。前
記ポリエステル類は、一般に飽和ジカルボン酸と飽和二
価アルコールとからなる熱可塑性樹脂で、例えば、ポリ
エチレンテレフタレート、ポリプロピレンテレフタレー
ト、ポリテトラメチレンテレフタレート（ポリブチレン
テレフタレート）、ポリヘキサメチレンテレフタレー
ト、ポリシクロヘキサン−1,4−ジメチロールテレフタ
レート、ポリネオペンチルテレフタレート、ポリエチレ
ンナフタレート等が挙げられる。これらの中で特にポリ
エ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等が好ましい。The present invention is applicable to all thermoplastic resin films, but is particularly suitable for a thermoplastic resin film which is difficult to heat and fuse. Examples of such a thermoplastic resin film include polyesters, polyvinylidene fluoride, PEEK (polyether ether ketone), and the like. In addition, it is needless to say that the bonding method of the present invention can be applied to polyethylene, polyvinyl chloride, or the like that can be heat-fused. The polyesters are generally thermoplastic resins composed of a saturated dicarboxylic acid and a saturated dihydric alcohol, such as polyethylene terephthalate, polypropylene terephthalate, polytetramethylene terephthalate (polybutylene terephthalate), polyhexamethylene terephthalate, and polycyclohexane-1, 4-dimethylol terephthalate, polyneopentyl terephthalate, polyethylene naphthalate and the like. Among these, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate and the like are particularly preferred.

これらの熱可塑性樹脂フィルムは、強度、寸法安定
性、耐熱性等を向上するために、二軸延伸したものを使
用するのが好ましい。These thermoplastic resin films are preferably biaxially stretched in order to improve strength, dimensional stability, heat resistance and the like.

また、本発明に用いる熱可塑性樹脂フィルムには、無
機フィラー、カーボンブラック等の充填材や、その他物
理的特性、化学的特性等を向上する目的で、熱安定剤、
光安定剤、難燃剤、可塑剤、帯電防止剤等を適宜添加す
ることができる。Further, the thermoplastic resin film used in the present invention, a filler such as an inorganic filler and carbon black, and other physical properties, for the purpose of improving the chemical properties, etc., a heat stabilizer,
Light stabilizers, flame retardants, plasticizers, antistatic agents and the like can be added as appropriate.

さらに、本発明の方法を適用するのが好ましいフィル
ムの厚さは、１〜1000μｍ位であり、特に30〜500μｍ
位のフィルムが好ましい。また、フィルム幅（接合部の
長さに相当）としては、特に制限がない。またエンドレ
スフィルムの直径についても制限がなく、5cm以下のも
のから数ｍ又はそれ以上のものまで広範に作製すること
ができる。Further, the thickness of the film to which the method of the present invention is preferably applied is about 1 to 1000 μm, particularly 30 to 500 μm.
Preferred films are. Further, there is no particular limitation on the film width (corresponding to the length of the bonding portion). There is no limitation on the diameter of the endless film, and it can be produced in a wide range from 5 cm or less to several m or more.

〔発明の効果〕〔The invention's effect〕

以上のように、本発明による熱可塑性樹脂フィルムの
接合方法によれば、まず超音波溶断により完全に溶融後
切断した溶断部を形成し、次にその溶断部に超音波エネ
ルギーを付与しながら押圧し、平坦化を行うので、得ら
れる接合部は強度が大きいだけでなく、実質的に平坦と
なり、継ぎ目のないエンドレスフィルムが作製できる。As described above, according to the thermoplastic resin film bonding method according to the present invention, first, a fusing portion cut completely after being completely melted by ultrasonic fusing is formed, and then pressed while applying ultrasonic energy to the fusing portion. In addition, since the flattening is performed, the obtained joint has not only high strength but also becomes substantially flat, so that a seamless endless film can be manufactured.

このようにして得られたエンドレスフィルムは、極め
て良好な平坦度及び機械的強度を要求される用途に好適
であり、従来不可能であったいわゆる“シームレス”エ
ンドレスフィルムとして使用することができる。The endless film obtained in this manner is suitable for applications requiring extremely good flatness and mechanical strength, and can be used as a so-called "seamless" endless film which has heretofore been impossible.

【図面の簡単な説明】[Brief description of the drawings]

第１図は、本発明の一実施例のよるフィルムの接合方法
の工程１に用いる超音波溶断装置を概略に示す部分断面
図であり、 第２図（ａ）、（ｂ）は、超音波溶断されたフィルム溶
断部の例を示す拡大断面図であり、 第３図は、第１図に示す超音波溶断部装置の概略斜視図
であり、 第４図は、本発明の一実施例によるフィルムの接合方法
の工程２を実施する様子を概略的に示す部分断面図であ
り、 第５図は、第４図に示す装置をフィルム接合部の直角方
向から見た部分断面図であり、 第６図、第７図及び第８図は従来のフィルム接合方法を
示す概略断面図である。 １……フィルム ２……超音波溶断装置 ４、43……超音波ホーン ５……ローレット ６……治具 ７……クリップ 10……車輪 11……スリット状開口部 21……溶断部 45……ベース台FIG. 1 is a partial sectional view schematically showing an ultrasonic fusing apparatus used in step 1 of a film bonding method according to one embodiment of the present invention. FIGS. 2 (a) and 2 (b) show ultrasonic waves. FIG. 3 is an enlarged cross-sectional view showing an example of a blown film fusing unit, FIG. 3 is a schematic perspective view of the ultrasonic fusing unit shown in FIG. 1, and FIG. 4 is a diagram showing an embodiment of the present invention. FIG. 5 is a partial cross-sectional view schematically showing a state of performing step 2 of the film bonding method. FIG. 5 is a partial cross-sectional view of the apparatus shown in FIG. 6, 7 and 8 are schematic sectional views showing a conventional film joining method. DESCRIPTION OF SYMBOLS 1 ... Film 2 ... Ultrasonic fusing device 4, 43 ... Ultrasonic horn 5 ... Knurl 6 ... Jig 7 ... Clip 10 ... Wheel 11 ... Slit-shaped opening 21 ... Fusing part 45 ... … Base stand

Claims (10)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】フィルム端部分を重ね合わせて超音波溶断
する工程１と、得られた溶断部を広げ、押圧しながら超
音波エネルギーを与えることにより、前記溶断部を平坦
化する工程２とからなることを特徴とするフィルムの接
合方法。1. An ultrasonic fusing step in which film end portions are overlapped with each other, and a step 2 in which the obtained fusing portion is spread and flattened by applying ultrasonic energy while pressing. A method of joining films, comprising: 【請求項２】保持手段によりフィルム端部分を密着した
状態で固定し、超音波ホーンと所定の刃部を有する手段
との間で、前記フィルム端部分を一定の押圧力をかけな
がら超音波溶断する工程１と、得られたフィルムの溶断
部を開いた状態でベース上に載置し、押圧するとともに
超音波エネルギーを与えることにより、前記フィルム溶
断部を平坦化する工程２とからなることを特徴とするフ
ィルムの接合方法。2. A film edge portion is fixed by a holding means in a state in which the film edge portion is in close contact with the film, and the film edge portion is ultrasonically blown while applying a constant pressing force between the ultrasonic horn and a means having a predetermined blade portion. And a step 2 of flattening the film fusing portion by placing the obtained film on the base with the fusing portion open, pressing and applying ultrasonic energy. Characteristic film joining method. 【請求項３】請求項２に記載のフィルムの接合方法にお
いて、前記刃部を有する手段は、フィルム面と平行な軸
に関して回転自在なローレットからなり、前記ローレッ
トと前記超音波ホーンとで前記フィルム端部分を押圧し
ながら、超音波エネルギーを与えることにより、フィル
ム端部分の溶断を行うことを特徴とするフィルムの接合
方法。3. The method according to claim 2, wherein the means having the blade portion comprises a knurl that is rotatable about an axis parallel to a film surface, and the knurl and the ultrasonic horn are used to form the film. A method of joining films, comprising applying ultrasonic energy while pressing an end portion to melt the end portion of the film. 【請求項４】請求項１乃至３のいずれかに記載のフィル
ムの接合方法において、前記フィルム端部分を前記超音
波ホーンと前記刃部を有する手段との間に挟持した状態
で、押圧下超音波エネルギーを与えながら、前記フィル
ムを前記超音波ホーンに対してフィルム接合部方向に相
対的に移動させることを特徴とするフィルムの接合方
法。4. The method for bonding films according to claim 1, wherein the end portion of the film is sandwiched between the ultrasonic horn and the means having the blade portion, and the film is pressed under a pressure. A method for bonding films, wherein the film is moved relative to the ultrasonic horn in a film bonding direction while applying sonic energy. 【請求項５】請求項１乃至４のいずれかに記載のフィル
ムの接合方法において、工程２において超音波ホーンと
して溶断部の全域をカバーする長さのものを使用し、一
度に溶断部の平坦化を行うことを特徴とするフィルムの
接合方法。5. The method for bonding films according to claim 1, wherein in step 2, an ultrasonic horn having a length covering the entire area of the fusing portion is used, and the ultrasonic horn is flattened at one time. A method for bonding a film, comprising: 【請求項６】請求項１乃至５のいずれかに記載のフィル
ムの接合方法において、前記フィルムが二軸延伸した熱
可塑性樹脂フィルムであることを特徴とするフィルムの
接合方法。6. A method according to claim 1, wherein said film is a biaxially stretched thermoplastic resin film. 【請求項７】端部分を重ね合わせて超音波溶断し、得ら
れた溶断部を広げ、押圧しながら超音波エネルギーを与
えることにより前記溶断部を平坦化してなる接合フィル
ムであって、接合部の肉厚がフィルムの他の部分と実質
的にに異ならないことを特徴とする接合フィルム。7. A bonding film wherein the end portions are overlapped and subjected to ultrasonic fusing, the obtained fusing portion is spread, and ultrasonic energy is applied while pressing to flatten the fusing portion. Characterized in that the thickness of the bonded film is not substantially different from other portions of the film. 【請求項８】所定の幅を有するフィルムの端部分に超音
波溶断により溶断部を形成し、それを開いた状態で超音
波エネルギーを与えて平坦化してなるエンドレスフィル
ムであって、接合部の肉厚がフィルムの他の部分と実質
的に異ならないことを特徴とするエンドレスフィルム。8. An endless film which is formed by forming a fusing portion at an end portion of a film having a predetermined width by ultrasonic fusing and applying ultrasonic energy in an opened state to flatten the film. An endless film characterized in that the thickness is not substantially different from other portions of the film. 【請求項９】請求項８に記載のエンドレスフィルムにお
いて、フィルム端部分を密着した状態で固定し、前記密
着したフィルム端部分を超音波ホーンにより一定の押圧
力をかけながら超音波溶断する工程１と、得られたフィ
ルムの溶断部を開いた状態で押圧し、超音波エネルギー
を与えることにより平坦化する工程２とからなる接合方
法により得られたことを特徴とするエンドレスフィル
ム。9. An endless film according to claim 8, wherein the film end portions are fixed in a state of being in close contact with each other, and said film end portions are ultrasonically blown while applying a constant pressing force by an ultrasonic horn. An endless film obtained by a bonding method comprising the steps of: pressing the fusing portion of the obtained film in an open state and flattening by applying ultrasonic energy. 【請求項１０】請求項８又は９に記載のエンドレスフィ
ルムにおいて、前記フィルムが二軸延伸した熱可塑性樹
脂フィルムであることを特徴とするエンドレスフィル
ム。10. The endless film according to claim 8, wherein said film is a biaxially stretched thermoplastic resin film.
JP2268626A 1990-10-05 1990-10-05 Film bonding method, bonding film and endless film obtained thereby Expired - Lifetime JP2948647B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2268626A JP2948647B2 (en) 1990-10-05 1990-10-05 Film bonding method, bonding film and endless film obtained thereby

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2268626A JP2948647B2 (en) 1990-10-05 1990-10-05 Film bonding method, bonding film and endless film obtained thereby

Publications (2)

Publication Number Publication Date
JPH04144735A JPH04144735A (en) 1992-05-19
JP2948647B2 true JP2948647B2 (en) 1999-09-13

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Country Link
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2712228A1 (en) * 1993-11-09 1995-05-19 Sfc Butt joining of heat sealable films
US6066226A (en) * 1994-08-03 2000-05-23 Mitsubishi Gas Chemical Company, Inc. Method of making a sheet-shaped oxygen absorber
ITMI20080555A1 (en) * 2008-04-01 2009-10-02 Francesco Fabbrica APPARATUS AND METHOD TO WELD MEMBRANES
JP2011148600A (en) * 2010-01-22 2011-08-04 Mitsubishi Electric Corp Repairing method and repairing device of moving handrail for passenger conveyor
CN109291445A (en) * 2018-08-31 2019-02-01 成都市星道科技有限公司 XPE material seamless interfacing method and seamless interfacing hot melting equipment

Also Published As

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