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FR2679485A1 - Method for the high-frequency welding of elastomeric articles - Google Patents

Method for the high-frequency welding of elastomeric articles Download PDF

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Publication number
FR2679485A1
FR2679485A1 FR9109493A FR9109493A FR2679485A1 FR 2679485 A1 FR2679485 A1 FR 2679485A1 FR 9109493 A FR9109493 A FR 9109493A FR 9109493 A FR9109493 A FR 9109493A FR 2679485 A1 FR2679485 A1 FR 2679485A1
Authority
FR
France
Prior art keywords
elastomer
plates
film
thin
rubber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
FR9109493A
Other languages
French (fr)
Inventor
Humbert Robert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SOCRATECH
Original Assignee
SOCRATECH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SOCRATECH filed Critical SOCRATECH
Priority to FR9109493A priority Critical patent/FR2679485A1/en
Publication of FR2679485A1 publication Critical patent/FR2679485A1/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • 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
    • 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
    • B29C65/5057—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 positioned between 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
    • 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
    • B29C66/341—Measures for intermixing the material of the joint interlayer
    • 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
    • B29C66/71—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
    • B29C66/723—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 being multi-layered
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/12—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives
    • C08J5/124—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives using adhesives based on a macromolecular component
    • C08J5/128—Adhesives without diluent
    • 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
    • B29C65/04—Dielectric heating, e.g. high-frequency welding, i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2321/00—Characterised by the use of unspecified rubbers

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)

Abstract

The method consists: - in inserting, between two sheets of rubber, a thin film of thermoplastic polyolefin, advantageously polyethylene, - in introducing the sandwich thus produced between the platens of a high-frequency applicator, and - after pressing the platens together, in generating between them a high-frequency electric field so that there is partial melting of the thin film and interpenetration of its molecules into those of the elastomer. Application to the welding of rubber sheets and strips.

Description

Procédé de soudage à haute fréquence d'articles en élastomère.High frequency welding process for elastomer articles.

L'invention se rapporte à un procédé pour le soudage d'articles en élastomères, notamment un soudage à haute fréquence. The invention relates to a method for welding elastomer articles, in particular high frequency welding.

Dans le domaine de l'assemblage d'une ou de plusieurs feuilles ou plaques ou profilés ou bandes de caoutchouc, une technique bien connue et simple à mettre en oeuvre consiste à assurer le collage desdites feuilles à l'aide d'une colle par exemple une colle cyanilique. In the field of assembling one or more sheets or plates or profiles or rubber bands, a well-known technique which is simple to implement consists in ensuring the bonding of said sheets using an adhesive for example. cyanilic glue.

Malheureusement, si efficace soit la colle utilisée, elle forme un film mince entre les deux feuilles, film qui finit par sécher et durcir, puis former une croûte qui manque tout à fait de souplesse ce qui présente un inconvénient sérieux quand on veut relier entre elles deux feuilles de caoutchouc elles-mêmes très souples et devant subir des déformations répétées. Dans ce cas particulier il est apparu alors préférable d'effectuer une soudure thermique des feuilles par pression partielle de leurs surfaces en contact, à l'aide par exemple de plaques chauffantes appliquées sur les feuilles. Si ce procédé donne satisfaction pour les films minces, il est difficilement utilisable pour des plaques d'élastomère plus épaisses, sauf à développer des moyens plus conséquents de chauffage pendant des temps plus longs.Unfortunately, however effective the glue used, it forms a thin film between the two sheets, film which ends up drying and hardening, then forming a crust which lacks quite flexibility which is a serious drawback when you want to connect them two sheets of rubber themselves very flexible and having to undergo repeated deformations. In this particular case, it then appeared preferable to perform thermal welding of the sheets by partial pressure of their contacting surfaces, using for example hot plates applied to the sheets. If this process is satisfactory for thin films, it is difficult to use for thicker elastomeric plates, except to develop more substantial means of heating for longer times.

L'invention apporte une solution efficace à ces problèmes en ce qu'elle propose l'assemblage d'élastomères par fusion d'un film plastique en remplacement d'une colle, grâce à un soudage à haute fréquence de mise en oeuvre rapide, adaptable à n'importe quel type et épaisseur de matériau élastomère, et qui ne perturbe en rien la souplesse du produit fini. The invention provides an effective solution to these problems in that it proposes the assembly of elastomers by melting a plastic film in place of an adhesive, thanks to a high frequency welding which is quick to implement and can be adapted. to any type and thickness of elastomeric material, and which does not in any way disturb the flexibility of the finished product.

Le procédé selon l'invention consiste à intercaler entre deux feuilles d'élastomère, un film mince de polyoléfine thermoplastique, avantageusement du polyéthylène, à introduire le sandwich ainsi réalisé entre les plateaux qui constituent la presse d'un applicateur haute-fréquence ou autre moyen de chauffage, à presser les plateaux contre ledit sandwich, puis à générer entre les plateaux un champ électrique à haute-fréquence pendant le temps suffisant et nécessaire pour que soit assuré le soudage des feuilles élastomères. The method according to the invention consists in interposing between two sheets of elastomer, a thin film of thermoplastic polyolefin, advantageously polyethylene, to introduce the sandwich thus produced between the plates which constitute the press of a high-frequency applicator or other means heating, pressing the plates against said sandwich, then generating between the plates a high-frequency electric field for the time sufficient and necessary to ensure the welding of the elastomeric sheets.

Du fait de leur inertie chimique, les polyoléfines et notamment le polyéthylène se prêtent bien au thermosoudage. Par conséquent au moment du chauffage, le film de polyéthylène fond au moins partiellement et ses molécules pénètrent les couches élastomères voisines. On a en outre un lien souple entre les deux couches d'élastomère. Due to their chemical inertness, polyolefins and in particular polyethylene lend themselves well to heat sealing. Consequently at the time of heating, the polyethylene film at least partially melts and its molecules penetrate the neighboring elastomer layers. There is also a flexible bond between the two layers of elastomer.

On notera que le film mince de polyéthylène est apporté indépendamment entre les plaques ou bandes élastomères, ou encore qu'il est coextrudé avec l'élastomère sur une ou deux faces. It will be noted that the thin polyethylene film is provided independently between the elastomeric plates or strips, or that it is coextruded with the elastomer on one or two faces.

L'application d'un champ électrique haute fréquence entre les plateaux autorise donc le soudage de plaques ou bandes de caoutchouc ayant n'importe quelle épaisseur et n'importe quelle souplesse.  The application of a high frequency electric field between the plates therefore allows the welding of rubber plates or strips having any thickness and any flexibility.

Claims (4)

REVENDICATIONS 1.- Procédé de soudage d'articles en élastomère ayant la forme de plaques, de profilés ou de bandes en caoutchouc, ayant des épaisseurs diverses et une souplesse variable, caractérisé en ce qu'il consiste à intercaler entre deux plaques ou bandes de caoutchouc, un film mince de polyoléfine thermoplastique, - à introduire le sandwich ainsi réalisé entre les plateaux d'un applicateur hautefréquence - à presser les plateaux contre ledit sandwich et à générer entre les plateaux un champ électrique à haute fréquence pendant le temps nécessaire pour que 1 'énergie calorifique dissipée dans le produit assure la fusion partielle du film de polyoléfine et l'interpénétration de ses molécules avec celles de l'élastomère. 1.- Method of welding elastomer articles in the form of plates, profiles or rubber bands, having various thicknesses and variable flexibility, characterized in that it consists in interposing between two rubber plates or bands , a thin film of thermoplastic polyolefin, - to introduce the sandwich thus produced between the trays of a high frequency applicator - to press the trays against said sandwich and to generate between the trays a high frequency electric field for the time necessary for 1 he heat energy dissipated in the product ensures the partial fusion of the polyolefin film and the interpenetration of its molecules with those of the elastomer. 2.- Procédé selon la revendication 1 caractérisé en ce que le film mince de polyoléfine thermoplastique est un copolymère du type du polyéthylène. 2.- Method according to claim 1 characterized in that the thin film of thermoplastic polyolefin is a copolymer of the polyethylene type. 3.- Procédé selon les revendications 1 et 2, caractérisé en ce que le film mince de polyoléfine est apporté indépendamment entre les plaques d'élastomère. 3.- Method according to claims 1 and 2, characterized in that the thin polyolefin film is provided independently between the elastomer plates. 4.- Procédé selon les revendications 1 et 2, caractérisé en ce que le film mince de polyoléfine est coextrudé avec les plaques d'élastomère.  4.- Method according to claims 1 and 2, characterized in that the thin polyolefin film is coextruded with the elastomer plates.
FR9109493A 1991-07-26 1991-07-26 Method for the high-frequency welding of elastomeric articles Pending FR2679485A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9109493A FR2679485A1 (en) 1991-07-26 1991-07-26 Method for the high-frequency welding of elastomeric articles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9109493A FR2679485A1 (en) 1991-07-26 1991-07-26 Method for the high-frequency welding of elastomeric articles

Publications (1)

Publication Number Publication Date
FR2679485A1 true FR2679485A1 (en) 1993-01-29

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0620106A1 (en) * 1993-03-29 1994-10-19 Kinugawa Rubber Ind. Co., Ltd. Method of producing vibration insulator

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1122119A (en) * 1966-12-07 1968-07-31 Myer Harold Hecht Dielectric fusing of plastic films
FR1568199A (en) * 1968-03-13 1969-05-23
FR2249110A1 (en) * 1973-10-25 1975-05-23 Stamicarbon
US4370189A (en) * 1980-12-16 1983-01-25 Phillips Petroleum Company Modifying thermoplastic materials and products thereof
JPS5996939A (en) * 1982-11-26 1984-06-04 Nippon Telegr & Teleph Corp <Ntt> Bonding method of ethylene-propylene rubber
JPS61111332A (en) * 1984-11-06 1986-05-29 Sumitomo Chem Co Ltd Bonding of rubber composition
EP0196269A2 (en) * 1985-03-29 1986-10-01 Rüdiger Staege Loading device for trucks
GB2198082A (en) * 1986-12-01 1988-06-08 Nissho Kk Method of welding thermoplastic resin
FR2667016A1 (en) * 1990-09-24 1992-03-27 Hutchinson METHOD AND DEVICE FOR MANUFACTURING ELASTOMERIC PARTS AND PARTS OBTAINED BY IMPLEMENTING SAID METHOD

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1122119A (en) * 1966-12-07 1968-07-31 Myer Harold Hecht Dielectric fusing of plastic films
FR1568199A (en) * 1968-03-13 1969-05-23
FR2249110A1 (en) * 1973-10-25 1975-05-23 Stamicarbon
US4370189A (en) * 1980-12-16 1983-01-25 Phillips Petroleum Company Modifying thermoplastic materials and products thereof
JPS5996939A (en) * 1982-11-26 1984-06-04 Nippon Telegr & Teleph Corp <Ntt> Bonding method of ethylene-propylene rubber
JPS61111332A (en) * 1984-11-06 1986-05-29 Sumitomo Chem Co Ltd Bonding of rubber composition
EP0196269A2 (en) * 1985-03-29 1986-10-01 Rüdiger Staege Loading device for trucks
GB2198082A (en) * 1986-12-01 1988-06-08 Nissho Kk Method of welding thermoplastic resin
FR2667016A1 (en) * 1990-09-24 1992-03-27 Hutchinson METHOD AND DEVICE FOR MANUFACTURING ELASTOMERIC PARTS AND PARTS OBTAINED BY IMPLEMENTING SAID METHOD

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 296 (C-377)(2352) 8 Octobre 1986 & JP-A-61 111 332 ( SUMITOMO CHEM CO LTD ) 29 Mai 1986 *
PATENT ABSTRACTS OF JAPAN vol. 8, no. 207 (M-327)21 Septembre 1984 & JP-A-59 096 939 ( NIPPON DENSIN DENWA KOSHA ) 4 Juin 1984 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0620106A1 (en) * 1993-03-29 1994-10-19 Kinugawa Rubber Ind. Co., Ltd. Method of producing vibration insulator
US5575869A (en) * 1993-03-29 1996-11-19 Kinugawa Rubber Ind. Co., Ltd. Method of producing vibration insulator

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