EP0617727A1 - Procede de collage de deux substrats non metalliques a l'aide d'un adhesif - Google Patents
Procede de collage de deux substrats non metalliques a l'aide d'un adhesifInfo
- Publication number
- EP0617727A1 EP0617727A1 EP93917511A EP93917511A EP0617727A1 EP 0617727 A1 EP0617727 A1 EP 0617727A1 EP 93917511 A EP93917511 A EP 93917511A EP 93917511 A EP93917511 A EP 93917511A EP 0617727 A1 EP0617727 A1 EP 0617727A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- adhesive
- particles
- magnetic field
- temperature
- charges
- 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.)
- Withdrawn
Links
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
- C09J5/06—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving heating of the applied adhesive
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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
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
- B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
- B29C65/3608—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint comprising single particles, e.g. fillers or discontinuous fibre-reinforcements
- B29C65/3612—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint comprising single particles, e.g. fillers or discontinuous fibre-reinforcements comprising fillers
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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
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
- B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
- B29C65/3608—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint comprising single particles, e.g. fillers or discontinuous fibre-reinforcements
- B29C65/3616—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint comprising single particles, e.g. fillers or discontinuous fibre-reinforcements comprising discontinuous fibre-reinforcements
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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
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
- B29C65/3672—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
- B29C65/3676—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic
- B29C65/368—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic with a polymer coating
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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
- B29C65/48—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
- B29C65/483—Reactive adhesives, e.g. chemically curing adhesives
- B29C65/4835—Heat curing adhesives
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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
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/4865—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding containing additives
- B29C65/4885—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding containing additives characterised by their composition being non-plastics
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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
- B29C65/72—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by combined operations or combined techniques, e.g. welding and stitching
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
- B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
- B29C66/91221—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature of the parts to be joined
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
- B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
- B29C66/91411—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
- B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
- B29C66/91651—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating
- B29C66/91653—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating by controlling or regulating the voltage, i.e. the electric potential difference or electric tension
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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
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/4865—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding containing additives
- B29C65/487—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding containing additives characterised by their shape, e.g. being fibres or being spherical
- B29C65/4875—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding containing additives characterised by their shape, e.g. being fibres or being spherical being spherical, e.g. particles or powders
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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
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/4865—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding containing additives
- B29C65/487—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding containing additives characterised by their shape, e.g. being fibres or being spherical
- B29C65/488—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding containing additives characterised by their shape, e.g. being fibres or being spherical being longitudinal, e.g. fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—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
- B29C66/7232—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 comprising a non-plastics layer
- B29C66/72327—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 comprising a non-plastics layer consisting of natural products or their composites, not provided for in B29C66/72321 - B29C66/72324
- B29C66/72328—Paper
Definitions
- the present invention relates to a process for bonding two non-metallic substrates using a heat-curing resin.
- this heating must allow to bring into a time less than one minute the entire mass of resin and especially the resin substrate interface at the polymerization temperature, the temperature of the latter not falling below the lower polymerization limit.
- This heating time must not involve very high frequencies, the use of which on an industrial scale poses too many problems, both with regard to the installation and to safety; it must not involve too large proportions of fillers under penalty of damaging the mechanical properties of the resin.
- the temperature of the particles heated by induction must not significantly exceed the upper polymerization temperature, otherwise the resin will burn in contact with the particles.
- the thermal energy generated by induction in a magnetic field can be the result of three types of losses, the losses by eddy current which increase with the dimensions of the conductive element, and are all the more high that the resistivity is low, the losses by hysteresis which are almost independent of the size, but dependent on the shape of the ferromagnetic or ferrimagnetic particles and which are more important than the losses by eddy current when it is a question of fine particles , and residual losses which involve phenomena such as dielectric losses or "magnetic viscosity" which represent a significant part of the losses in the case of ferrites.
- the eddy current and hysteresis losses increase with the square of the frequency and the frequency respectively.
- US 5,075,034 relates to a solution according to which conductive carbon black is combined with ferromagnetic or ferrimagnetic particles in an adhesive composition.
- the aim of carbon black is to lower the volume resistivity of the adhesive mixture to allow rapid induction heating at relatively low frequency, probably by eddy current.
- This solution leads to putting a relatively large proportion of solid matter in the resin, capable of damaging its bonding properties.
- the aim of the present invention is to show that it is possible to work at frequencies below 250 kHz, to poly erise or prepolymerize the resin in less than 60 s with a shear strength> 50 56 of the bond strength by oven polishing using a small proportion of ferromagnetic or ferrimagnetic charges.
- the subject of this invention is a process for bonding two non-metallic substrates using a heat-polymerizable resin according to claim 1.
- the advantage of the present invention is to make it possible to obtain results equivalent to, or even superior to, those obtained according to the state of the art without having the above-mentioned disadvantages. It will be seen in the following description that the choice of parameters according to the invention allows good transmission of energy to the resin and to the resin-substrate interface without the duration exceeding the time set according to industrial requirements. .
- an induction coil 40 mm long comprising 6 oval turns of 20 x 30 mm supplied by a generator of 6 kW and 200 kHz, voltage regulated.
- the samples to be bonded consist of two substrates 25 mm wide and 3 mm thick overlapping 25 mm and the space provided between the substrates for the adhesive is 2 mm.
- the adhesive used is either of the polyurethane type or of the one-component epoxy type.
- hot-polymerizable adhesives can be used depending on the nature of the substrate.
- the fillers are always added to the resin. However, they can also be placed in the substrates to be bonded to reduce the temperature difference between the middle of the joint and the substrate and guarantee a sufficient polymerization temperature at the substrate-adhesive interface. Tests have shown that it is not essential, but that it can be useful.
- the thickness of the adhesive is very small, in particular of the order of 0.1 mm, the charges can be placed either in the substrate, in the adhesive, or in both, but the latter alternative is not not very useful given the small thickness of adhesive to be heated, it can be heated with such a thickness, both from the inside and from the outside.
- these fibers are capable of heating by induction and can be sized and / or the composition suitable for exhibiting resin heating properties comparable to other types of fillers. .
- the shape of the charges has an important influence on the demagnetization factor and therefore on the real magnetic field inside the material and that this influence increases with the increase in the relative permeability ⁇ r of the material.
- the magnetic field and magnetic induction (B) inside a well oriented fiber are larger than inside a spherical or flat portion particle.
- induction B describes a hysteresis loop as a function of the field.
- the surface of this loop is roughly equal to 4 B m ITl ⁇ QV X H_ where B m fUC ⁇ - v ⁇ is the maximum induction in Tesla and H___ is the coercive field in A / m.
- This surface is an energy per unit of volume (J / m 3 ).
- the shape of the particles has a great importance on these losses by hysteresis due to the influence of this shape on the real magnetic field inside the particles as explained above.
- the magnetic permeability is limited to 3, while with acicular particles typically having a length-width ratio of 10, the demagnetization factor decreases and the effective permeability is typically between 30 and 50 for ⁇ r equal to 100, respectively 1000. Consequently, the value of the maximum induction field B ma ⁇ is 10 times higher for acicular particles with a width-length ratio of 10 having a relative permeability ⁇ r > 100 only for spherical particles.
- a power is required which takes into account the volume to be heated, the density of the resin, its specific heat, the temperature for polyerizing it, the thermal yield taking into account the losses in the substrate and heating time.
- This power for the above tests is of the order of 8 - 20 W per joint.
- the specific power relative to the weight of adhesive loaded varies from 9.6 W per gram of adhesive to 4.8 W / g depending on whether the thermal efficiency is 50% or 100%.
- the specific power for loads varies from 1000 to 10000 W per cm 3 of loads depending on the yields and the concentrations of loads.
- the particles are not too large, that is to say that they have a high exchange surface relative to their volume otherwise the heat of the particles increases rapidly and i There is a risk of burning the adhesive in contact with these particles before the mass of the adhesive reaches the polymerization temperature.
- the geometry of the samples used during the tests has already been indicated above.
- the following examples were carried out under the following conditions: before applying the adhesive, the surfaces of the substrates to be bonded were cleaned with trichloroethane.
- the adhesive of the polyurethane type is Togocoll FPM 500/24566, FMP 500/90096 from EMS Togo CH-8590 Romanshorn. These are adhesives whose polymerization temperature ranges from 90 "to 120 * C.
- the epoxy, 1C component used is Naftotec 1361 from Chemetal1 whose polymerization temperature ranges from 120 to 140 ° C. .
- the samples were obtained by mixing the fillers in the adhesive until the dispersion was homogeneous.
- the adhesive was then applied to one of the substrates which was then placed on a template intended to obtain assemblies of reproducible substrates, then the second substrate was placed on the template and pressed so that the spacing of approximately 2 mm between the substrates is formed thanks to the template. The adhesive that protrudes from the surface of the substrates is removed.
- the losses of the charges subjected to the magnetic field of given amplitude and frequency depend on the nature of the material, the concentration, the dimension and the shape of the particles.
- Adhesive samples of different charge concentrations were prepared to determine the concentration load capable of obtaining the desired temperature in ⁇ 45 s.
- the temperature measurement was carried out using a thermocouple. Since this heats up in an alternating magnetic field, the measurement was made when the magnetic field was stopped.
- the rise in temperature in the adhesive is almost linear over time. The higher the supply voltage of the inductor, the shorter the heating time.
- the distribution of the temperature in the adhesive bond may not be uniform in the event of poor dispersion of the charges as well as in the presence of agglomerates, so that certain zones could be overheated and others not sufficiently polymerized.
- the risk of forming agglomerates is manifested in particular for particles ⁇ 5 ⁇ m.
- this means consists in choosing particles whose Curie point is slightly higher than the maximum polymerization temperature of the adhesive, so that even if the temperature rises quickly, there is no risk of the adhesive overheating, so it suffices to adjust the heating time to the energy required.
- Norsk Hydro magnetite was used in the form of fibers obtained by extraction from the molten material and having an L / D ratio of 50 with a diameter of
- the heating time is 15 s.
- Cerac magnetite with spherical grains of uniform size of the order of 3 ⁇ m with a purity of 99.5% With a concentration of 5% by weight and a magnetic field of 60.4 kA / m heating time at 120 ° C is 25s. It goes down to 15s with a field of 65.6 kA / m and to 8s with 10% by weight and the same field of 65.6 kA / m.
- the resistance of the bond to shear is in the first two cases, of the order of 75% of the resistance obtained by heating in an oven.
- the magnetic and electrical properties of the pigment are the same as those of Example 1.
- Ferrite FeMnZn from TDK, type PQ 32 This ferrite was first crushed and sieved to obtain a particle size ⁇ 45 ⁇ m.
- the resistivity of the material is 6.5 Ohm m
- the coercive field Hc at room temperature is 14 A / m
- the maximum induction Bs is 510 mT.
- the adhesive used is of the FPM 90096 type, the proportion of fillers by weight is 10%, the applied field 65.6 kA / m.
- the time to reach 120 ° C is 28 s and the shear strength compared to the resistance by heating in an oven is 84%.
- FeMnZn ferrite from Philips type 3B1, having a resistivity of 0.2 Ohm • m a coercive field of 30 A / m a maximum induction Bs of 400 mT, with a Curie point of the order of 160 * C These particles have a size of around 20 ⁇ m.
- These fillers were added to one of the components of an epoxy resin to a component Naftotec 1361 from Chemetall in an amount re .0% by weight of the final mixture. These components were then mixed. It is a resin whose upper point ⁇ e polymerization is 160 ° C. To reach 120 ° C, the heating time in a field of 65.6 kA / m is 25 s.
- stainless steel fibers from Bekaert * R ' are used as fillers in a proportion of 2.5% by weight.
- Their resistivity is 74-10 -8 Ohm "m
- the coercive field of 20 A / m the residual induction of 0.9 mT
- the fiber size 2000/8 ⁇ m.
- the applied field is 56 kA / m.
- the heating time at 120 ° C is 26s and the bonding strength is 55%.
- Nickel was used in the form of sponge particles of Sheritt Gordon of a dimension ⁇ 30 ⁇ m in a proportion of 10% by weight. With an applied magnetic field of 65.4 kA / m heating time at 120 ° C is 22s and the shear strength of the binding is 68% of that obtained by polymerization in the oven.
- the heating can be repeated after a certain cooling.
- Example 1 The magnetite of Example 1 was taken up in a proportion of 5% by weight, it was heated in a magnetic field of 60.4 kA / m for 30 s to reach 120 ° C. it was allowed to cool for less than 60 s and reheated for 15s.
- the shear strength of the bond is 80%.
- Example 11 The Ni flakes from Novamet from Example 9 were used in the same proportion. After the first heating of 20s, it is allowed to cool to around 100 ° C for less than 30s and it is reheated for 10s. The shear strength obtained is then 82%.
- Example 13 it involves sticking two sheets of paper.
- 1% by weight of Cerac magnetite is mixed with the polyethylene and the paper is coated by extrusion at 280 ° C. and on an aluminum-paper composite.
- Two pieces of these sheets thus covered are joined by their faces coated with charged polyethylene and are subjected to a magnetic field of 57.6 kA / m. After 5s the pieces are glued.
- the peel resistance test is carried out and gives about 2.5 N / 15 mm at a peeling speed of 127 mm / min.
- This example relates to the bonding of SMC type substrates in which the substrate is loaded with ferromagnetic or ferrimagnetic particles or fibers so that the substrate heats up at the same time as the adhesive, which makes it possible to reduce the temperature gradient.
- the change of substrate and adhesive makes it possible to reduce the heating time, to increase the resistance of the bonding and the charges of the substrate can serve at the same time to reinforce it when they are in the form of fibers.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH2622/92 | 1992-08-24 | ||
CH262292A CH685942A5 (fr) | 1992-08-24 | 1992-08-24 | Procede de collage de deux substrats non metalliques a l'aide d'un adhesif. |
PCT/CH1993/000205 WO1994004623A1 (fr) | 1992-08-24 | 1993-08-17 | Procede de collage de deux substrats non metalliques a l'aide d'un adhesif |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0617727A1 true EP0617727A1 (fr) | 1994-10-05 |
Family
ID=4237904
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93917511A Withdrawn EP0617727A1 (fr) | 1992-08-24 | 1993-08-17 | Procede de collage de deux substrats non metalliques a l'aide d'un adhesif |
Country Status (5)
Country | Link |
---|---|
US (1) | US5447592A (fr) |
EP (1) | EP0617727A1 (fr) |
JP (1) | JPH07500629A (fr) |
CH (1) | CH685942A5 (fr) |
WO (1) | WO1994004623A1 (fr) |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6037180A (en) * | 1996-03-08 | 2000-03-14 | Minnesota Mining And Manufacturing Company | Method for measuring the quantity of a polymeric or pre-polymeric composition |
US6543976B1 (en) * | 1996-05-03 | 2003-04-08 | Senco Products, Inc. | Fastening device |
US6971829B2 (en) * | 1996-05-03 | 2005-12-06 | Senco Products, Inc | Fastening device |
AU746100B2 (en) * | 1997-02-28 | 2002-04-18 | Robert Harlan Johnson Jr. | High efficiency heating agents |
WO1998042988A1 (fr) | 1997-03-21 | 1998-10-01 | Creaholic S.A. | Procede pour ancrer des elements de liaison dans un materiau comportant des pores ou des cavites, et elements de liaison pour ledit ancrage |
US6348679B1 (en) * | 1998-03-17 | 2002-02-19 | Ameritherm, Inc. | RF active compositions for use in adhesion, bonding and coating |
US6649888B2 (en) | 1999-09-23 | 2003-11-18 | Codaco, Inc. | Radio frequency (RF) heating system |
JP4528397B2 (ja) * | 1999-12-17 | 2010-08-18 | ポリマテック株式会社 | 接着方法および電子部品 |
WO2001076851A1 (fr) * | 2000-04-06 | 2001-10-18 | Formteile Helmer Gmbh | Joint soude entre deux pieces en polymere, en particulier dans la construction de conduites et de raccords |
DE10032817B4 (de) * | 2000-07-06 | 2010-02-25 | Newfrey Llc, Newark | Befestigungsteil mit einem schmelzbaren Leit-Klebstoff |
DE10141674A1 (de) * | 2000-09-01 | 2002-03-14 | Henkel Kgaa | Reaktionsklebstoff mit mindestens einer mikroverkapselten Komponente |
EP1363543B1 (fr) * | 2001-03-02 | 2006-09-06 | Woodwelding AG | Implants et dispositif permettant de relier des parties de tissu |
WO2003056104A1 (fr) * | 2001-12-24 | 2003-07-10 | Woodwelding Ag | Procede pour appliquer des elements sur des surfaces d'objets de construction utilises dans le domaine de la circulation routiere |
US6955540B2 (en) * | 2002-08-23 | 2005-10-18 | Woodwelding Ag | Preparation for being fastened on a natural tooth part or tooth and corresponding fastening method |
US7008226B2 (en) * | 2002-08-23 | 2006-03-07 | Woodwelding Ag | Implant, in particular a dental implant |
US8293828B2 (en) * | 2005-08-29 | 2012-10-23 | Kubota Research Associates, Inc. | Adhesive and process for attaching and detaching articles |
DE102006040049B4 (de) * | 2006-08-26 | 2009-12-17 | Airbus Deutschland Gmbh | Verfahren und Vorrichtung zum Vorformen von Kohlenstofffaser-Halbzeugen für die Herstellung von Faserverbundbauteilen |
JP2010510516A (ja) * | 2006-11-21 | 2010-04-02 | ギロス パテント アーべー | マイクロ流体装置とマイクロ流体装置とを結合する方法 |
FR2918919B1 (fr) * | 2007-07-17 | 2013-03-29 | Eurocopter France | Procede et dispositif pour coller la coiffe metallique d'un bord d'attaque d'une voiture |
US20100316498A1 (en) * | 2008-02-22 | 2010-12-16 | Horton, Inc. | Fan manufacturing and assembly |
US7984718B2 (en) | 2009-09-29 | 2011-07-26 | Joshua C. Harrison | Method for cleaning or limiting adhesive |
DE102009055099A1 (de) * | 2009-12-21 | 2011-06-22 | tesa SE, 20253 | Hitzeaktiviert verklebbare Flächenelemente |
JP5899443B2 (ja) * | 2012-07-03 | 2016-04-06 | パナソニックIpマネジメント株式会社 | シリコンインゴット固定用熱硬化性接着剤、それを用いたシリコンインゴット固定方法およびシリコンウエハの製造方法 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5655474A (en) * | 1979-10-12 | 1981-05-16 | Sekisui Chem Co Ltd | Radiofrequency heating curable adhesive |
CA1268107A (fr) * | 1984-07-19 | 1990-04-24 | Alfred Fuller Leatherman | Adhesif thermodurcissable pour l'assemblage sans distorsion d'elements thermodurcissables autostables |
JPS63118931A (ja) * | 1986-11-07 | 1988-05-23 | Hitachi Ltd | デ−タベ−ス管理方式 |
JP2546316B2 (ja) * | 1988-02-12 | 1996-10-23 | 東亞合成株式会社 | 接着剤組成物 |
US5123989A (en) * | 1989-06-14 | 1992-06-23 | Toda Kogyo Corporation | Resin-bonding method |
JP2671525B2 (ja) * | 1989-10-23 | 1997-10-29 | 東亞合成株式会社 | 接着剤 |
DE69124111T2 (de) * | 1990-11-28 | 1997-08-07 | Fuller H B Licensing Financ | Härtung von thermoplastischen rezeptorzusammensetzungen mittels hochfrequenz |
-
1992
- 1992-08-24 CH CH262292A patent/CH685942A5/fr not_active IP Right Cessation
-
1993
- 1993-08-17 EP EP93917511A patent/EP0617727A1/fr not_active Withdrawn
- 1993-08-17 US US08/232,019 patent/US5447592A/en not_active Expired - Fee Related
- 1993-08-17 JP JP6505727A patent/JPH07500629A/ja not_active Withdrawn
- 1993-08-17 WO PCT/CH1993/000205 patent/WO1994004623A1/fr not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO9404623A1 * |
Also Published As
Publication number | Publication date |
---|---|
CH685942A5 (fr) | 1995-11-15 |
US5447592A (en) | 1995-09-05 |
WO1994004623A1 (fr) | 1994-03-03 |
JPH07500629A (ja) | 1995-01-19 |
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