EP0227111B1 - Semelle de fer à repasser - Google Patents

Semelle de fer à repasser Download PDF

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Publication number
EP0227111B1
EP0227111B1 EP19860118007 EP86118007A EP0227111B1 EP 0227111 B1 EP0227111 B1 EP 0227111B1 EP 19860118007 EP19860118007 EP 19860118007 EP 86118007 A EP86118007 A EP 86118007A EP 0227111 B1 EP0227111 B1 EP 0227111B1
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EP
European Patent Office
Prior art keywords
sole plate
bonding agent
layer
binder
resistant layer
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.)
Expired - Lifetime
Application number
EP19860118007
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German (de)
English (en)
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EP0227111A3 (en
EP0227111A2 (fr
Inventor
Lothar Ullrich
Gunter Jung
Diethard Burger
Hartmut Schönborn
Hans-Günther Alschweig
Winfried Heinzel
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Braun GmbH
Original Assignee
Braun GmbH
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Publication date
Application filed by Braun GmbH filed Critical Braun GmbH
Priority to AT86118007T priority Critical patent/ATE60093T1/de
Publication of EP0227111A2 publication Critical patent/EP0227111A2/fr
Publication of EP0227111A3 publication Critical patent/EP0227111A3/de
Application granted granted Critical
Publication of EP0227111B1 publication Critical patent/EP0227111B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
    • B05D5/083—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface involving the use of fluoropolymers
    • B05D5/086—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface involving the use of fluoropolymers having an anchoring layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/18—After-treatment
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F75/00—Hand irons
    • D06F75/38—Sole plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2202/00—Metallic substrate
    • B05D2202/20—Metallic substrate based on light metals
    • B05D2202/25—Metallic substrate based on light metals based on Al
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2350/00—Pretreatment of the substrate
    • B05D2350/60—Adding a layer before coating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/3154—Of fluorinated addition polymer from unsaturated monomers
    • Y10T428/31544—Addition polymer is perhalogenated

Definitions

  • the invention relates to an iron soleplate according to the preamble of patent claim 1.
  • Iron soles with a coated surface are generally known.
  • an iron is described in the unpublished EP 0 217 014 A2, the sole of which is made of aluminum on the one hand to save weight and the associated easier handling and on the other hand to improve the thermal conductivity. Because of its low weight, this iron also has the advantage that it slides more easily than an iron with an iron or steel sole with the same coefficient of friction.
  • the surface of the soleplate of the iron sole described in EP 0 217 014 A2 was coated with a hard material component, which is preferably made of metallic or ceramic materials, which was produced by flame or plasma spraying.
  • the hard material layer produced in this way by spraying has the disadvantage that it is porous and that it absorbs in particular water, moisture, air and other contaminants, including aluminum minimum sole can penetrate. As a result, corrosion occurs on the side of the aluminum surface which can lead to the formation or blistering and even detachment of the hard material layer. The consequence of this is damage to the ironing side of the iron soleplate, which leads to fabric damage when ironing the ironing material and causes a reduced sliding ability of the iron.
  • the iron soleplate described in EP 0 217 014 A2 is also heavily soiled in the course of time by finishing agents and starch adhering to it and stoving onto it, as well as material residues if the corresponding textiles are ironed too hot. The consequence of this is a dull sole surface which hinders sliding over the material to be ironed. It is almost impossible to remove burnt-on finishing agents with cleaning agents. The only way to make the soleplate glide again is to sand the soleplate and coat it again.
  • a method is preferably used in tools for the production of castings and in cooking appliances, for example frying pans, with which first an oxide layer and then a layer of PTFE or a copolymer of tetrafluoroethylene and a layer of PTFE on the surface of the objects mentioned Hexafluoropropylene is applied.
  • the surface of the object in question is subjected to a pretreatment comprising several process steps before the layer consisting, for example, of aluminum oxide or nickel oxide or mixtures of both substances is applied.
  • the oxide layer is applied by a thermal spray process, while the PTFE layer or the other layers mentioned is applied by a spray process, as is known from painting technology, i.e.
  • GB-PS 956,740 describes surface coatings which, in addition to their main area of application, namely cooking devices, such as pans, waffle irons or the like, can also be used for iron soles.
  • the surface coating described there consists of a hard material layer of metal or a ceramic material applied to a metallic base body, which is sealed with an organic binder, for example PTFE, after being applied by a spraying process.
  • the sealed hard material layer is then subjected to a grinding process.
  • the grinding process is carried out to such an extent that "islands" are formed on the binder layer, which are formed by the highest elevations of the hard material layer sprayed onto the base body, the binder layer of which has already been completely ground off.
  • the "islands” are surrounded by larger areas that are still completely filled with binding agents. If such a coating is applied to the base body of iron soles, this means that the iron slides to a considerable extent on the hard material layer. This fact has the consequence, on the one hand, that corrosion can occur in particular with steam irons and, on the other hand, the advantageous, low friction values which can be achieved with a full coating with binder are partially lost again. Finally, the phenomena which again have been mentioned above in connection with the iron sole described in EP 0 217 014 A2 occur on the "islands". The disadvantages resulting therefrom are, in turn, that a "blunt" surface is formed on the "islands” which impairs sliding over the material to be ironed.
  • the surface of the ceramic hard material layer which is relatively rough due to its production by means of a thermal spraying process and thus has wave crests and troughs, is smoothed with a particularly lubricious, anti-adhesive and sealing organic binder before it is coated. It is thereby achieved that the wave crests which are present on their surface after the spraying process and which can only be recognized as peaks can be blunted. As a result, the surface does not look like a very fine sandpaper, but it is sufficiently easy to slide and does not cause any noticeable wear on the items to be ironed. The roughness is therefore reduced.
  • This smoothing process carried out on the surface of the hard material layer also contributes to the fact that the binder more easily forms a closed protective film on the surface of the hard material layer, wherein an improvement in the adhesion of the binder is achieved by the depressions which are still present. It has been shown in practice that if the surface structure of the hard material layer after the smoothing process has an average roughness of 5 to 10 microns, a particularly resistant, well sliding iron soleplate results.
  • the mean roughness depth in accordance with DIN 4768 is understood to mean the mean of the individual roughness depths of five successive individual measurement sections.
  • the average thickness of the film of the binder layer is less than 10 ⁇ m, preferably between 0.1 and 2 ⁇ m.
  • an iron soleplate that is at room temperature when ironing on cotton (DIN 53919) already has friction values between 0.12 and 0.20. If the sole is heated for ironing, the binder layer emerges somewhat from the surface of the sole due to thermal expansion, which advantageously leads to a further drop in the coefficient of friction.
  • the binder is applied thicker to the crests of the hard material layer, this increases the gliding properties of the iron soleplate, but it then loses its scratch resistance because burrs can be easily introduced into the relatively soft binder layer compared to the hard material layer, which, as already mentioned at the beginning mentioned in the explanation of the prior art, lead to poses on the surface of the binder layer. These burrs formed by the raised parts are not too resistant, but they are enough to damage particularly delicate textiles.
  • the thickness of the binder layer according to the invention it is also hard and wear-resistant with good adhesion.
  • the hard material layer applied by flame or plasma spraying or by another thermal coating method to the ironing side of the metallic iron soleplate is, due to such methods, interspersed with pores and fine channels.
  • the pores and fine channels of the hard material layer are sealed by the applied binder, so that when ironing a still damp iron the steam escaping from it cannot penetrate into the hard material layer, thereby preventing corrosion damage to the soleplate.
  • the soleplate according to the invention is therefore particularly suitable for steam irons, since when they are used larger amounts of steam emerge from the steam outlet openings provided on the side of the soleplate of the iron.
  • the soleplate created by the invention also withstands greater mechanical forces that can sometimes occur during ironing.
  • this is further improved in that the troughs of the hard material layer are only thinly coated by the binder such that the surface structure of the hard material layer on the surface of the binder coating is essentially retained.
  • the surface of the side of the bracket has a targeted, medium roughness.
  • the surface of the hard material layer is coated by the binder in such a way that the troughs formed due to the roughness are filled by the binder, but the wave crests are in turn only covered by a thin film.
  • This type of sealing has the advantage that, due to the layer of binder still applied very thinly on the wave crests, a particularly smooth iron soleplate is created.
  • the coefficient of thermal expansion of the binder layer is a multiple of the thermal expansion coefficient of the hard material layer, when the temperature rises, the material of the binder layer embedded in the wave troughs literally grows upwards beyond the wave crests, although - even if the binder layer above the wave crests is damaged, for example by scratches or scoring - a certain self-healing effect of the binder layer occurs.
  • This self-healing effect arises from the fact that the material portion emerging from the wave valleys beyond the wave crests is partially shifted during ironing and is deposited at the injured point. This ensures a permanent seal and excellent sliding properties of the iron soleplate.
  • the width of the wave troughs must not be too large, since then the comparatively large accumulation of the binder in the wave troughs results in a comparatively large bulge of the binder layer between the individual wave crests on the wing. This would lead to the undesirable side effect that above the wave crests, where the bulge is less than above the wave troughs, there are depressions in which material residues can be deposited.
  • a hard material layer thickness of less than 100 ⁇ m, preferably 40 to 50 ⁇ m only slight mechanical stresses form in the hard material layer when exposed to heat, which are absorbed by a targeted porosity of 3 to 10% and by the elastic properties of this layer.
  • the stresses are mainly generated by temperature changes in the soleplate (aluminum). If the hard material layer were too thick, stress cracks would occur, which would result in this layer lifting off or crumbling. The iron would then be unusable.
  • a minimum layer thickness is required to be sufficient de To achieve load-bearing capacity or resistance to mechanical influences on the relatively soft surface of the aluminum sole.
  • the binder layer of the soleplate of the iron does not rub off onto the material to be ironed at higher temperatures, it is advantageous if the binder is colorless and transparent. This also ensures that the color of the hard material layer shows through.
  • Binder resins enriched with PTFE or PFA or silicone are particularly suitable as binders. These materials are particularly slippery in connection with binder resin, have a high temperature resistance and adhere well to the soleplate, due to the roughness depth design according to the invention.
  • the PTFE, PFA or silicone particles in the binder resin rise to the surface of the binder layer. This means that there is hardly any PTFE, PFA or silicone content in the lower layers of the binder layer. The consequence of this is that these parts are removed from the surface relatively quickly when ironed.
  • a development of the invention provides that a filler, preferably barium sulfate, is added to the binder. Since the filler exhibits particle-like behavior and therefore increases friction when it comes into contact with the ironing material, the proportion of filler added must not be too high. Because the adhesive strength of the binder to the hard material surface is determined neither by the PTFE content nor by the filler, but solely by the binder resin, the filler content must not be too high for this reason either.
  • the binder consists of 40 to 50% binder resin, 5 to 10% filler and the rest of PTFE or PFA or silicone.
  • a binder composed in this way is particularly capable of creep in the diluted state, so that the pores and finer channels are sealed in deeper regions of the hard material layer.
  • a preferred dark gray to black color is achieved in that the hard material layer consists of a mixture of Al2O3 and TiO2, the mixing ratio being about 2: 1.
  • any gray values can be achieved with these components in correspondingly different mixing ratios.
  • With a mixing ratio of approximately 97: 3, a light gray iron soleplate is created.
  • the specified low roughness on the ironing side of the soleplate results in a matt, glossy surface that is particularly insensitive to dirt and slides well.
  • colorless binder is more sensitive and not as stable in its mechanical consistency to the colored binders, it has been shown in practice that excellent results are achieved even with colorless binder and that no discoloration on the frame can occur due to the lack of color pigments.
  • An adhesion promoter layer which preferably consists of an alloy of nickel and aluminum, is advantageously arranged between the surface of the highly thermally conductive metal and the hard material layer.
  • the adhesion promoter layer can be applied over the entire area or even only in such a way that there are isolated empty spaces. The adhesive promotes better adhesion of the hard material layer on the soleplate.
  • the process for producing the soleplate of the invention provides that the hard material layer is surface-treated before the binder is applied.
  • mechanical surface treatment has proven to be particularly cost-effective, by means of which the desired roughness depth can also be exactly maintained.
  • the surface of the hard material layer can also be treated in several work steps such that predominantly only the wave crests of the surface structure are removed.
  • This surface treatment can be carried out with a not too hard hard material layer, i.e. with a mixing ratio of about 2: 1 or less (Al2O3: TiO2), advantageously with a brush tool, through which the surface of the hard material layer is smoothed in the shortest possible time.
  • the surface of the hard material layer After the surface of the hard material layer has been smoothed, it is cleaned by a combined pressure and suction bubble process or by an ultrasound process in aqueous solution in order to obtain a grease-free surface.
  • the roughness depth on the surface of the binder layer essentially corresponds to the roughness depth of the surface of the hard material layer.
  • the wave crests, which determine the wing of the soleplate are only covered by a thin film with a thickness of less than 10 ⁇ m, preferably 0.5 to 2 ⁇ m.
  • the dosage of the binder can be accomplished particularly simply by spraying the binder electrostatically onto the surface of the hard material layer.
  • the electrostatic spraying process enables an extremely fine spray jet in which the droplets generated can penetrate directly into the pores and into the fine channels of the hard material layer due to their good creeping ability, so that the binder covers the surface structure with an almost uniform film.
  • a particularly spreadable binder which consists for example of PTFE or PFA or silicone and binder resin, is mixed with a solvent. The volatile solvent evaporates shortly after the binder has been sprayed on, so that PTFE or PFA or. Silicone parts are included.
  • the binder is cured by infrared radiation, preferably with the aid of a quartz lamp, for curing the soleplate of the iron.
  • the binder layer is cured in a much shorter time. Due to the shorter curing time of the binder and the fact that the soleplate is not heated as a whole, but only locally on its surface, gas expansion in the cavities (pores, blowholes) of the cast aluminum soleplate, which are made of aluminum, is largely avoided.
  • FIG. 1 the surface of the iron soleplate 1 is shown in cross-section, with the corresponding subsections 2 to 9 following each work step, running from top to bottom the structure of the surface is shown. Beginning in each case from the surface 10, each section 2 to 9 only runs to a depth of the base body 12 of the iron soleplate 1, which is made of aluminum, as shown by the breaking line 11, since the sections are shown greatly enlarged.
  • the base body 12 made of aluminum can have been produced from aluminum by any of the generally known casting methods.
  • the fracture lines 13, 14 which run vertically in the sections 2 and 3 in the drawing indicate that part of the layer thickness of the base body 12 has been omitted in this area. This was necessary so that the surfaces 10 and 17 present in the partial areas 2 and 3 could also be shown on the drawing. In the cross section of the aluminum base body 12, inclusions, cavities or other pores 15 can be seen, which inevitably arise when aluminum is cast.
  • the surface 10 After the casting of the base body 12, the surface 10 has an average roughness depth of 10 to 20 ⁇ m. The surface 10 can then be blasted for cleaning and deburring purposes. In subsection 3, surface 17 then has the structure shown.
  • the surface 17, or in the event that no blasting is carried out the surface 10 is ground so far that the resulting surface 18 has an average roughness depth of approximately 0.6 to 4 ⁇ m, in particular between 1 and 2 ⁇ m, having.
  • the grinding process is necessary because the base body 12 after the casting process due to the temperature drop warp and therefore its surface 10 can be curved.
  • the surface 18 is cleaned of oxides and other impurities by corundum blasting or a similar surface treatment method and then gives the surface 19 shown in subsection 5.
  • An adhesion promoter 16 such as nickel aluminum (NiAl), is then applied to the surface 19 for further treatment in a flame or plasma spraying process.
  • the proportion of aluminum (Al) in this alloy is preferably 29 to 33%.
  • the purpose of the adhesion promoter layer in addition to a mechanical connection of the hard material layer 20 to the base body 12, is also to produce a diffusion connection between the purely ionically bound hard material layer and the purely metal-bound aluminum base body 12.
  • the NiAl particles form regions 32 which, depending on the amount of material applied, produce a closed (FIG. 2) or no closed (FIG. 1) adhesion promoter layer 16 on the surface 19.
  • a closed adhesion promoter layer 16 its average roughness is preferably 10 to 20 ⁇ m with an average thickness of approximately 12 ⁇ m.
  • a ceramic or metallic hard material layer 20 is then applied to the areas 32 and the partially uncovered (FIG. 1) or to the closed surface 19 (FIG. 2) by flame or plasma spraying.
  • the surface 21 produced in this way has an average roughness depth of 10 to 20 ⁇ m.
  • the thickness of the hard material layer 20 is less than 100 ⁇ m, preferably 40 to 50 ⁇ m.
  • the material of the hard material layer 20 penetrates into the empty spaces 22 formed between the regions 32 and also covers the surface 19 material of the hard material layer 20 engages behind both with an adhesive layer 16 according to FIG. 1 and according to FIG.
  • the porosity pores 28 and channels 30
  • This porosity is between 3 and 7%, preferably 5%.
  • the adhesion promoter layer 16 also contributes to voltage equalization.
  • the surface 21 of the hard material layer 20 due to the manufacturing process, has particularly sharp-edged tips of the wave crests 23 (FIG. 1), these are removed in a subsequent mechanical surface treatment, such as polishing, brushing or sleeving, up to a predetermined height.
  • the resulting surface 29 is shown in the section 8.
  • the surface defined by the highest ground tips of the wave crests 23 forms the wing 33 of the iron soleplate 1.
  • the average roughness depth is reduced from 10 to 20 ⁇ m to approximately 5 to 10 ⁇ m; the lower lying regions of the troughs 25 are not or only slightly influenced.
  • the penultimate operation is followed by the spraying of an organic binder 26, as shown in section 9.
  • the organic binder consists of a mixture of PTFE or PFA or silicone with a binder resin, a filler that causes an even distribution of the PTFE, PFA or silicone particles in the binder resin, and a thinner.
  • the binder layer 26 can be sprayed on so thinly (FIG. 1) that the subsequent average roughness of the binder layer 26 remains almost unchanged from the average roughness of the hard material layer 20 specified in subsection 8. In this case, the binder 26 is thus applied in the wave troughs 25 as well as on the wave crests 23 with approximately the same layer thickness.
  • the binder layer 26 shown in FIG. 2 arises from the fact that so much binder 26 is applied that the troughs 25 are filled with binder 26 and that the surface defined by the highest ground tips of the wave crests 23, which forms the support surface 33 of the iron soleplate 1, again is only covered with a thin film.
  • the hard material layer 20 has a large number of inclusions or pores 28 and fine channels 30 which would allow liquid and dirt to penetrate if the binder layer 26 did not prevent this.
  • the channels 30 result from the fact that the hard material layer 20 is constructed in the form of a sheet by the flame or plasma spraying process.
  • the incorporation of the binder 26 in the deeper layers of the hard material layer 20 is shown in the section 9.
  • the ironing side 27 of the soleplate 1 is irradiated infrared so that the binder 26 can dry out and harden. Due to the infrared radiation, the surface 27 of the soleplate 1 is heated so quickly that the binder layer 26 is cured in a very short time, without there being a disadvantageous expansion for the soleplate 1 as a result of the heating in the aluminum base body 12.
  • the surface 27 of a binder layer 26 designed according to FIG. 2 has a scratch, a groove or a similar injury 34, which has resulted in the binder layer 26 having been removed there except for the hard material layer 20.
  • the soleplate 1 When the soleplate 1 is heated, a self-healing effect occurs with regard to the injury 34 in that the material of the binder layer 26 embedded in the two troughs adjacent to the injury 34 literally grows upward beyond the contour of the surface 27 due to the temperature increase (cf. bulges 35 and 36). During ironing, this material is displaced by the frictional action that occurs and fed to the injury 34, as a result of which the binder layer 26 is restored at the site of the injury 34.

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  • Textile Engineering (AREA)
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Claims (15)

1. Semelle de fer à repasser fabriquée dans un métal bon conducteur de la chaleur, de préférence en aluminium, avec sur la face à repasser une couche dure faite dans un matériau céra­mique et appliquée par un procédé de projection thermique, par exemple métallisation à la flamme ou projection plasma, dont la surface rugueuse présente des vallées (25) et des crêtes (23) et qui est revêtue d'un liant organique particulièrement glissant, antiadhésif et obturant, caractérisé en ce que les crêtes (23) sont lissées jusqu'à ce que la structure superficielle (29) de la couche dure (20) présente une profondeur de rugosité moyenne de 5 à 10 µm et en ce que les crêtes (23) ne reçoivent qu'un film fin de liant (26) dont l'épaisseur moyenne est inférieure à 10 µm et se situe de préférence entre 0,1 et 2 µm.
2. Semelle de fer à repasser selon la revendication 1, caractérisée en ce que les vallées (25) ne reçoivent elles aussi qu'un film relativement fin de liant (26), si bien que la struc­ture superficielle (29) de la couche dure (20) est essentielle­ment conservée à la surface (27) du liant (26).
3. Semelle de fer à repasser selon la revendication 1, caractérisée en ce que les vallées sont remplies de liant (26) et en ce que le coefficient de dilatation thermique du liant (26) est un multiple de celui de la couche dure (20).
4. Semelle de fer à repasser selon la revendication 2 ou 3, caractérisé en ce que l'épaisseur de la couche dure (20) est inférieure à 100 µm et se situe de préférence entre 40 et 50 µm.
5. Semelle de fer à repasser selon la revendication 2 ou 3, caractérisée en ce que le liant (26) est incolore et transpa­rent.
6. Semelle de fer à repasser selon la revendication 5, caractérisée en ce que le liant (26) est une résine enrichie de PTFE (polytétrafluoro-éthylène) ou de PFA (perfluoro-alkyle­oxyde polymère) ou de silicone.
7. Semelle de fer à repasser selon la revendication 6, caractérisée en ce que le liant (26) est additionné d'une char­ge, de préférence du sulfate de baryum.
8. Semelle de fer à repasser selon la revendication 7, caractérisée en ce que le liant est constitué des pourcentages suivants en masse : 40 à 50% de résine, 5 à 10% de charge, le reste de PTFE, de PFA ou de silicone.
9. Semelle de fer à repasser selon la revendication 1, caractérisée en ce que la couche dure est constituée d'un mélan­ge d'oxyde d'aluminium (Al₂O₃) et d'oxyde de titane (TiO₂).
10. Semelle de fer à repasser selon la revendication 9, caractérisée en ce que le rapport de mélange entre Al₂O₃ et TiO₂ est d'environ 2/1.
11. Semelle de fer à repasser selon la revendication 9, caractérisée en ce que le rapport de mélange entre Al₂O₃ et TiO₂ est d'environ 97/ 3.
12. Semelle de fer à repasser selon la revendication 1, caractérisée en ce qu'une couche d'adhérence (16) est appliquée entre la surface (19) du métal bon conducteur de la chaleur et la couche dure (20).
13. Semelle de fer à repasser selon la revendication 12, caractérisée en ce que la couche d'adhérence (16) est constituée d'un alliage de nickel et d'aluminium (NiAl).
14. Procédé de revêtement de la semelle de fer à repasser dotée d'une couche dure selon la revendication 1, caractérisé en ce que, avant l'application du liant (26), la couche dure (20) subit un traitement superficiel par ponçage ou brossage tel que l'on n'enlève principalement que les pointes (23) des crêtes (23), en ce que le liant (26) est ensuite appliqué par un procé­dé de projection électrostatique sous formé diluée sur la couche dure (20) et en ce que le liant (26) est durci par exposition à un rayonnnement infrarouge.
15. Procédé selon la revendication 14, caractérisé en ce que le rayonnement infrarouge est produit par un dispositif équipé d'une lampe à quartz.
EP19860118007 1985-12-24 1986-12-23 Semelle de fer à repasser Expired - Lifetime EP0227111B1 (fr)

Priority Applications (1)

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AT86118007T ATE60093T1 (de) 1985-12-24 1986-12-23 Buegeleisensohle.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3546099 1985-12-24
DE3546099 1985-12-24
DE8604031U 1986-02-14
DE8604031 1986-02-14

Publications (3)

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EP0227111A2 EP0227111A2 (fr) 1987-07-01
EP0227111A3 EP0227111A3 (en) 1988-05-04
EP0227111B1 true EP0227111B1 (fr) 1991-01-16

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EP19860118007 Expired - Lifetime EP0227111B1 (fr) 1985-12-24 1986-12-23 Semelle de fer à repasser

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US (1) US4862609A (fr)
EP (1) EP0227111B1 (fr)
DE (1) DE3676975D1 (fr)
ES (1) ES2023113B3 (fr)

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US5411771A (en) * 1993-04-29 1995-05-02 Tsai; Tung-Hung Method for coating metal cookware
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DE4410410B4 (de) * 1994-03-25 2007-03-29 BSH Bosch und Siemens Hausgeräte GmbH Bügeleisensohle
DE4411790A1 (de) * 1994-04-06 1995-10-12 Braun Ag Elektrisches Bügeleisen
BE1008961A3 (nl) * 1994-11-14 1996-10-01 Philips Electronics Nv Strijkijzer met glijlaag.
US6138389A (en) * 1995-09-25 2000-10-31 Matsushita Electric Industrial Co., Ltd. Iron bottom surface with plated metal film
ES2198573T5 (es) * 1996-09-24 2008-05-16 Koninklijke Philips Electronics N.V. Plancha y base inferior para una plancha.
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Also Published As

Publication number Publication date
US4862609A (en) 1989-09-05
ES2023113B3 (es) 1992-01-01
EP0227111A3 (en) 1988-05-04
EP0227111A2 (fr) 1987-07-01
DE3676975D1 (en) 1991-02-21

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