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WO1993010958A1 - Soudure de materiaux plastiques - Google Patents

Soudure de materiaux plastiques Download PDF

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Publication number
WO1993010958A1
WO1993010958A1 PCT/GB1992/002176 GB9202176W WO9310958A1 WO 1993010958 A1 WO1993010958 A1 WO 1993010958A1 GB 9202176 W GB9202176 W GB 9202176W WO 9310958 A1 WO9310958 A1 WO 9310958A1
Authority
WO
WIPO (PCT)
Prior art keywords
interlayer
acrylic
welding
mirror
weld
Prior art date
Application number
PCT/GB1992/002176
Other languages
English (en)
Inventor
Michael Joseph Casey
Original Assignee
Clearplas Ltd.
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 Clearplas Ltd. filed Critical Clearplas Ltd.
Publication of WO1993010958A1 publication Critical patent/WO1993010958A1/fr

Links

Classifications

    • 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
    • B29C65/08—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
    • B29C65/48—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
    • B29C66/05—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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
    • B29C66/5326—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially flat
    • 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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/61—Joining from or joining on the inside
    • 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
    • B29C66/712—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 the composition of one of the parts to be joined being different from the composition 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
    • 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
    • B29C66/70—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
    • 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
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0085—Copolymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2011/00—Optical elements, e.g. lenses, prisms
    • B29L2011/0058—Mirrors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3055—Cars

Definitions

  • This invention relates to the welding of different plastics materials. It was specifically devised with reference to the welding of polymethylmethacrylate to polyvinyl chloride (acrylic to PVC) .
  • an acrylic mirror needs to be secured to a sun visor which is covered with a different plastics material, typically a flexible PVC or other plastics sheeting.
  • a different plastics material typically a flexible PVC or other plastics sheeting.
  • a conventional acrylic resin mirror has hitherto been made of a plastics material having a working rating of less than 95°C. It is now becoming necessary to use a material having a working rating of 150°C in order to meet improving standards in the motor industry.
  • a method of welding two different plastics materials having poor weld compatibility comprising placing an interlayer of plastics film having good weld compatibility with each of said two different plastics between the two different plastics materials and performing a single welding operation on said two different plastics material and interlayer.
  • One of the plastics materials may be polyvinyl chloride (PVC) having a substantial content of opacifier or pigment.
  • PVC polyvinyl chloride
  • said one material may be another type of plastics film containing a substantial content of opacifier or pigment.
  • the other plastics material may be polymethylmethacrylate (acrylic).
  • the acrylic may be a high temperature rating acrylic such as a polyi ide enhanced acrylic.
  • the interlayer may be a low temperature rated PVC film.
  • the PVC of the interlayer is preferably transparent and contains substantially no opacifiers or pigments.
  • the weld may be formed by high frequency electric welding or by ultrasonic welding.
  • the welding tool may incorporate a sharp edge adapted to penetrate substantially through the said one material and interlayer whereby, when the tool has been removed, a portion of the said one material and interlayer adjacent the weld may be readily manually removed.
  • the invention further provides an article comprising two different plastics materials having poor weld compatibility and having an interlayer of plastics film having good weld compatibility to each of said two different plastics materials, welded therebetween in a single weld.
  • the article may comprise an assembly of pigmented opaque PVC sheet and an acrylic mirror.
  • the interlayer may be a low temperature rated PVC.
  • Preferably the interlayer is a transparent PVC containing no opacifiers or pigments.
  • the PVC and interlayer may be welded to a front face of the mirror and the rear face of the mirror may be silvered prior to welding.
  • the pigmented opaque film and interlayer may cover the face of the mirror during welding and may be removed manually thereafter along a line defined by the welding tool.
  • Figure 1 is a' front elevational view partly broken away of a vehicle sunvisor embodying the invention.
  • Figure 2 is a sectional view on the lines 2.2 of Figure 1.
  • a sunvisor 10 is faced with a light coloured film 11 and contains a vanity mirror 12 which is made of a high temperature rating clear acrylic plastics material and which is silvered on the rear side 13.
  • the mirror has a peripheral wall or rim 14 having a rounded contour in accordance with our European Patent No. 0088846.
  • the material 11 does not have adequate compatibility with the acrylic material of the mirror 12 to permit direct welding. This is because the acrylic material is of a high temperature rating, for example comprising a polyi ide enhanced form of polymethylmethacrylate, and also because the weld amplitude in high frequency welding is greatly reduced when attempts are made to weld a light coloured film. It is believed that this is due to the presence of pigments and opacifiers, for example the use of a titanium dioxide whitener in the film.
  • an interlayer 15 may be used, the interlayer comprising a transparent low temperature rating • PVC which is substantially devoid of pigments and opacifiers.
  • the film 15 is of relatively low cost, since it is preferred to be thinner than the film 11 and also since it merely needs to extend across the region of the weld 16.
  • the mirror 12 is firstly formed as an injection moulding in high temperature acrylic, after which the rear side 13 is metallised, for example by vacuum metallisation in generally known manner. It will be seen from Figure 2 that there is a small step 17 on each face of the mirror and it is within the area defined by this step 17 that a weld is made.
  • the interlayer 15 is first placed in contact with the mirror 12 and then the opaque film layer is added so that the three are face to face. It is preferred that the film and interlayer 11 and 15 have some form of openings overlying the central portion of the mirror 12 to enable them to be removed readily after welding. A high frequency electric welding tool is applied and the weld is carried out for a suitable period at a temperature determined by experiment for the particular materials used. From Figure 2, it will be seen that the main body of the weld 18 is relatively flat and that there is also a sharp pinched portion 19 of the weld at the forward face of the mirror 12.

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)

Abstract

Un miroir acrylique (12) est fixé dans un pare-soleil (10) constitué par un matériau avec lequel le matériau acrylique présente une compatibilité de soudure faible au moyen d'une couche intermédiaire (15) de matériau avec lequel à la fois le miroir acrylique (12) et le matériau (11) du pare-soleil présentent une compatibilité de soudure adéquate. Le matériau (11) du pare-soleil peut être une pellicule en PVC possédant une teneur élevée en pigments et en opacifiants et l'acrylique peut être un acrylique renforcé par un polyimide possédant une valeur élevée de température de service.
PCT/GB1992/002176 1991-11-26 1992-11-25 Soudure de materiaux plastiques WO1993010958A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9125098.5 1991-11-26
GB919125098A GB9125098D0 (en) 1991-11-26 1991-11-26 Welding of plastics materials

Publications (1)

Publication Number Publication Date
WO1993010958A1 true WO1993010958A1 (fr) 1993-06-10

Family

ID=10705254

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1992/002176 WO1993010958A1 (fr) 1991-11-26 1992-11-25 Soudure de materiaux plastiques

Country Status (2)

Country Link
GB (1) GB9125098D0 (fr)
WO (1) WO1993010958A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104827655A (zh) * 2014-02-11 2015-08-12 宁波舜宇光电信息有限公司 一种塑料结构件与透红外部件的结合方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB912829A (en) * 1960-09-06 1962-12-12 Fulmer Res Inst Ltd Improvements relating to the bonding together of plastics materials
GB1232227A (fr) * 1968-11-11 1971-05-19
DE2206745A1 (de) * 1972-02-12 1973-08-16 Gubela Fa Hans Umkehrreflektor
GB1327985A (en) * 1971-01-28 1973-08-22 Ford Motor Co Motor vehicle sun visor
FR2278228A7 (fr) * 1974-07-13 1976-02-06 Happich Gmbh Gebr Pare-soleil, particulierement destine a etre utilise dans des vehicules
FR2366959A1 (fr) * 1976-10-08 1978-05-05 Iao Industrie Riunite Spa Pare-soleil pour vehicule automobile
EP0088846A1 (fr) * 1982-03-05 1983-09-21 Clearplas Limited Miroir
DE3704591A1 (de) * 1986-02-14 1987-08-20 Dainippon Printing Co Ltd Formprodukt mit einer mit einem farbmuster versehenen inneren unebenheit

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB912829A (en) * 1960-09-06 1962-12-12 Fulmer Res Inst Ltd Improvements relating to the bonding together of plastics materials
GB1232227A (fr) * 1968-11-11 1971-05-19
GB1327985A (en) * 1971-01-28 1973-08-22 Ford Motor Co Motor vehicle sun visor
DE2206745A1 (de) * 1972-02-12 1973-08-16 Gubela Fa Hans Umkehrreflektor
FR2278228A7 (fr) * 1974-07-13 1976-02-06 Happich Gmbh Gebr Pare-soleil, particulierement destine a etre utilise dans des vehicules
FR2366959A1 (fr) * 1976-10-08 1978-05-05 Iao Industrie Riunite Spa Pare-soleil pour vehicule automobile
EP0088846A1 (fr) * 1982-03-05 1983-09-21 Clearplas Limited Miroir
DE3704591A1 (de) * 1986-02-14 1987-08-20 Dainippon Printing Co Ltd Formprodukt mit einer mit einem farbmuster versehenen inneren unebenheit

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPIL Week 8217, Derwent Publications Ltd., London, GB; AN 82-33709E(17) *
PATENT ABSTRACTS OF JAPAN vol. 10, no. 277 (M-519)(2333) 10 September 1986 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104827655A (zh) * 2014-02-11 2015-08-12 宁波舜宇光电信息有限公司 一种塑料结构件与透红外部件的结合方法

Also Published As

Publication number Publication date
GB9125098D0 (en) 1992-01-22

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