EP0602221A1 - Quasi-crystal-based composite coating and method for making same - Google Patents

Quasi-crystal-based composite coating and method for making same

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Publication number
EP0602221A1
EP0602221A1 EP93914815A EP93914815A EP0602221A1 EP 0602221 A1 EP0602221 A1 EP 0602221A1 EP 93914815 A EP93914815 A EP 93914815A EP 93914815 A EP93914815 A EP 93914815A EP 0602221 A1 EP0602221 A1 EP 0602221A1
Authority
EP
European Patent Office
Prior art keywords
quasi
ptfe
coating
crystalline
cooking
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Withdrawn
Application number
EP93914815A
Other languages
German (de)
French (fr)
Inventor
Jean Charles Weber
Michel Parmentier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
France Grignotage SARL
Original Assignee
France Grignotage SARL
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 France Grignotage SARL filed Critical France Grignotage SARL
Publication of EP0602221A1 publication Critical patent/EP0602221A1/en
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
    • 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
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
    • C04B41/48—Macromolecular compounds
    • C04B41/4838—Halogenated polymers
    • C04B41/4842—Fluorine-containing polymers
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/82—Coating or impregnation with organic materials
    • C04B41/83—Macromolecular compounds
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/043—Sliding surface consisting mainly of ceramics, cermets or hard carbon, e.g. diamond like carbon [DLC]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/20—Sliding surface consisting mainly of plastics
    • F16C33/201—Composition of the plastic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/24—Brasses; Bushes; Linings with different areas of the sliding surface consisting of different materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/02—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using coatings, e.g. vitreous or enamel coatings

Definitions

  • the present invention relates to a non-stick coating for surfaces, for example cooking surfaces, heat exchange surfaces, friction surfaces. It also relates to a process for obtaining the surface and the surface obtained.
  • the coatings offered have one to two advantageous properties, but are most often very poor in one or more others.
  • the coatings offered have one to two advantageous properties, but are most often very poor in one or more others. For example :
  • the object of the invention is to solve at least the problem of the incompatibility of the aforementioned parameters and more particularly to obtain a synthesis of the properties of quasicrystals for their hardness and conductivity, and of PTFE for their non-stick properties. , with the creation of permanent cooking surfaces and also offering remarkable polish.
  • a non-stick coating for surfaces according to the invention is characterized in that it is formed: - of a base of quasi-crystalline alloy forming a reticle adhering perfectly by its underside to a matrix and having an upper surface with porosity particular.
  • non-stick coating for example surfaces for cooking utensils, characterized in that it uses a composite material consisting of the combination of an underlayer of quasi-crystalline alloy. and of a PTFE type polymer on a matrix and in that the processing is such that the final surface has a porous quasi-crystalline mesh leaving PTFE cells slightly recessed from the surface.
  • REPLACEMENT SHEET Processes in which the quasi-crystal / polymer proportion varies according to the desired surface effect to favor the specific and specific properties of one or other of the constituents
  • the following describes a coating for surfaces or cooking utensils, the single figure of which shows the structure.
  • the quasi-crystalline base (2) is used in such a way that it is porous and the pores (6) are filled with polymer (3) in such a way that the polymer does not surface on the quasi-crystalline surface, but offers a slight shrinkage resulting in a slightly concave surface.
  • the coating thus obtained according to the invention consists of the combination of a base of quasi-crystalline alloy (1) (within the meaning of CNRS patent No. FR-A-2 635 117) forming a reticle of variable porosity, and of a non-stick polymer (3) filling the pores (6), the polymer finally occupying a proportion of the surface such that any contact with the working instruments (9) such as knives, cutlery ... is done with the 'quasi-crystalline soul therefore very resistant, while glbal contact with
  • the asperities of the quasi-crystalline base (7) are all in the same outcrop plane (8) and all the concave surfaces of the pores are set back relative to said outcrop plane.
  • non-stick polymer polytetrafluoroethylene, known by the abbreviation used below for PTFE, is preferably used.
  • Such a coating consists according to the invention for example in a surfacing process in two partially superimposed phases whose sequences are known. After an adequate cleaning, the surface (2) is treated by bombardment or thermal spraying of quasi-crystalline particles according to a technique suitable for the use of these pulverulent alloys.
  • the conditions for the projection of powdery particles are calculated so as to obtain the desired porosity.
  • the treated part is then coated with PTFE and polymerized in the oven.
  • the coating formed according to the invention makes it possible to combine the advantages of quasi-crystalline coatings and surfaces based on PTFE, namely, that it combines: - the good thermal qualities of quasi-crystals: the coating saves time 1/3 of cooking and / or power.
  • the quasi-crystalline layer then also functions as a bonding layer.
  • the contact surface with food is mainly provided by the polymer, reducing to a minimum the phenomena of sticking and gratinating.
  • the obturation of the porosity by the polymer reduces the trapping therefore the degradation of
  • the non-stick properties of the coating obtained according to the invention can be used for other applications than cooking or heat exchange surfaces, and in particular for all applications where it is sought to reduce the mechanical adhesion. between two surfaces, all tribological applications for resistance to friction and corrosion.
  • such a coating can be applied according to the invention on the contact surfaces of an assembly (shaft-bearing).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Plasma & Fusion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Metallurgy (AREA)
  • Food Science & Technology (AREA)
  • Paints Or Removers (AREA)
  • Laminated Bodies (AREA)
  • Cookers (AREA)

Abstract

L'invention concerne un revêtement anti-adhérent pour surfaces par exemple des surfaces pour ustensiles de cuisson, caractérisé en ce qu'il met en oeuvre en combinaison: une base (2) en alliage quasi-cristallin formant un réticule adhérant parfaitement par sa face inférieure sur une matrice (1) et présentant une surface supérieure à porosité particulière, un polymère de type PTFE remplissant les pores (6). L'invention concerne également un procédé d'obtention du revêtement ainsi que les surfaces obtenues.The invention relates to a non-stick coating for surfaces, for example surfaces for cooking utensils, characterized in that it uses a combination of: a base (2) of quasi-crystalline alloy forming a reticle adhering perfectly by its face lower on a matrix (1) and having an upper surface with particular porosity, a polymer of the PTFE type filling the pores (6). The invention also relates to a process for obtaining the coating as well as the surfaces obtained.

Description

Revêtement composite à base de quasi-cristaux et son procédé de fabricationComposite coating based on quasi-crystals and process for its production
La présente invention concerne un revêtement anti-adhérent pour surfaces par exemple des surfaces de cuisson, surfaces d'échange de chaleur, surfaces de frottement. Elle concerne également un procédé d'obtention de la surface et la surface obtenue.The present invention relates to a non-stick coating for surfaces, for example cooking surfaces, heat exchange surfaces, friction surfaces. It also relates to a process for obtaining the surface and the surface obtained.
Dans l'application particulière des surfaces de cuisson, le problème du revêtement impose au fabricants de poêles, fours, plaques... de trouver un compromis entre un certain nombre de paramètres généralement incompatibles :In the particular application of cooking surfaces, the coating problem requires manufacturers of stoves, ovens, plates ... to find a compromise between a certain number of generally incompatible parameters:
• la dureté (résistance à l'abrasion)• hardness (resistance to abrasion)
- le collage et l'adhésion des matières- bonding and adhesion of materials
• la conduction de la chaleur - l'aspect externe du revêtement• heat conduction - the external appearance of the coating
Généralement, les revêtements proposés possèdent une à deux propriétés intéressantes, mais sont le plus souvent très mauvais dans une ou plusieurs autres. A titre d'exemple :Generally, the coatings offered have one to two advantageous properties, but are most often very poor in one or more others. For exemple :
- les métaux sont très durs (ou peuvent être durcis) et sont bons conducteurs de la chaleur, mais les matières y adhèrent de façon importante. Ils sont difficiles à nettoyer et leur aspect se déσ—de rapidement du fait de ce nettoyage nécessairement rude.- metals are very hard (or can be hardened) and are good conductors of heat, but the materials adhere to it in a significant way. They are difficult to clean and their appearance is quickly de-colored due to this necessarily harsh cleaning.
- les PTFE sont des anti-adhésifs remarquables mais sont très sensibles à l'abrasion et quasiment isolants thermiquement.- PTFE are remarkable anti-adhesives but are very sensitive to abrasion and almost thermally insulating.
- les revêtements quasi-cristallins sont durs et meileurs conducteurs de la chaleur. Ils se nettoient facilement mais n'ont pas des propriétés anti-adhésives aussi bonnes que les PTFE. L'objet de l'invention consiste à résoudre au moins le problème de l'incompatibilité des paramètres précités et plus particulièrement d'obtenir une synthèse des propriétés des quasi-cristaux pour leur dureté et conductivité, et des PTFE pour leurs propriétés anti-adhésives, avec constitution de surfaces de cuisson permanentes et offrant de plus un poli remarquable.- quasi-crystalline coatings are hard and better conductors of heat. They are easy to clean but do not have as good non-stick properties as PTFE. The object of the invention is to solve at least the problem of the incompatibility of the aforementioned parameters and more particularly to obtain a synthesis of the properties of quasicrystals for their hardness and conductivity, and of PTFE for their non-stick properties. , with the creation of permanent cooking surfaces and also offering remarkable polish.
Un revêtement anti-adhésif pour surfaces selon l'invention se caractérise en ce qu'il est formé : - d'une base en alliage quasi-cristallin formant un réticule adhérant parfaitement par sa face inférieure sur une matrice et présentant une surface supérieure à porosité particulière.A non-stick coating for surfaces according to the invention is characterized in that it is formed: - of a base of quasi-crystalline alloy forming a reticle adhering perfectly by its underside to a matrix and having an upper surface with porosity particular.
Selon l'invention il s'agit d'un revêtement anti-adhérent par exemple des surfaces pour ustensiles de cuisson caractérisé en ce qu'il met en oeuvre un matériau composite constitué de la combinaison d'une sous-couche en alliage quasi-cristallin et d'un polymère de type PTFE sur une matrice et en ce que la mise en oeuvre est telle que la surface finale présente un maillage quasi-cristallin poreux laissant des alvéoles de PTFE en léger retrait par rapport à la surface.According to the invention it is a non-stick coating, for example surfaces for cooking utensils, characterized in that it uses a composite material consisting of the combination of an underlayer of quasi-crystalline alloy. and of a PTFE type polymer on a matrix and in that the processing is such that the final surface has a porous quasi-crystalline mesh leaving PTFE cells slightly recessed from the surface.
- et de polymère anti-adhésif remplissant les pores.- and non-stick polymer filling the pores.
Divers procédés de mise en oeuvre sont possibles notamment :Various methods of implementation are possible, in particular:
FEUILLE DE REMPLACEMENT • Procédés dans lesquels la proportion quasi-cristaux/polymère varie en fonction de l'effet de surface recherché pour privilégier les propriétés propres et spécifiques de l'un ou l'autre des constituants,REPLACEMENT SHEET • Processes in which the quasi-crystal / polymer proportion varies according to the desired surface effect to favor the specific and specific properties of one or other of the constituents,
- Procédés de transfert simultané ou non, mécanique et thermique, dans lesquels les conditions de temps, de température et d'apaisseur peuvent varier largement.- Simultaneous or non-mechanical and thermal transfer processes, in which the conditions of time, temperature and thickness can vary widely.
On comprendra mieux l'invention à l'aide de la description ci-après faite en référence à la figure unique montrant un détail de la structure du revêtement.The invention will be better understood using the description below made with reference to the single figure showing a detail of the structure of the coating.
A titre d'exemple non limitatif, on décrit ci-après un revêtement pour surfaces ou ustensiles de cuisson dont la figure unique montre la structure.By way of nonlimiting example, the following describes a coating for surfaces or cooking utensils, the single figure of which shows the structure.
1 o Sur la matrice par exemple en aluminium, cuivre ou aciers de divers types (1 ), bonne conductrice de la chaleur, ou en verre, est déposée une base quasi-cristalline (2) adhérant parfaitement à la matrice.1 o On the matrix, for example aluminum, copper or steels of various types (1), good conductor of heat, or glass, is deposited a quasi-crystalline base (2) adhering perfectly to the matrix.
La base (2) quasi-cristalline est mise en oeuvre de telle sorte qu'elle soit poreuse et les pores (6) sont remplis de polymère (3) de telle façon que le polymère n'affleure pas à la surface quasi-cristalline, mais offre un léger retrait se traduisant par une surface légèrement concave. i 5 Le revêtement ainsi obtenu selon l'invention consiste en la combinaison d'une base en alliage quasi-cristallin (1) (au sens du brevet CNRS n° FR-A-2 635 117) formant un réticule de porosité variable, et d'un polymère anti-adhésif (3) remplissant les pores (6), le polymère occupant finalement une proportion de la surface telle que tout contact avec les instruments de travail (9) tels que couteaux, couverts... se fait avec l'âme quasi-cristalline donc très résistante, alors que le contact glbal avec lesThe quasi-crystalline base (2) is used in such a way that it is porous and the pores (6) are filled with polymer (3) in such a way that the polymer does not surface on the quasi-crystalline surface, but offers a slight shrinkage resulting in a slightly concave surface. i 5 The coating thus obtained according to the invention consists of the combination of a base of quasi-crystalline alloy (1) (within the meaning of CNRS patent No. FR-A-2 635 117) forming a reticle of variable porosity, and of a non-stick polymer (3) filling the pores (6), the polymer finally occupying a proportion of the surface such that any contact with the working instruments (9) such as knives, cutlery ... is done with the 'quasi-crystalline soul therefore very resistant, while glbal contact with
20 matières en cours de cuisson se fait essentiellement sur le polymère (3), donc sans adhésion. La configuration finale obtenue est telle que l'altération de la surface ne peut se faire : le PTFE est protégé, ce qui lui permet de jouer plus longtemps son rôle anti-adhésif.20 materials during baking is essentially done on the polymer (3), therefore without adhesion. The final configuration obtained is such that the surface cannot be altered: the PTFE is protected, which allows it to play its non-stick role longer.
De préférence les aspérités de la base quasi-cristalline (7) sont toutes dans un même plan d'affleurement (8) et toutes les surfaces concaves des pores sont en retrait par rapport audit plan 25 d'affleurement.Preferably the asperities of the quasi-crystalline base (7) are all in the same outcrop plane (8) and all the concave surfaces of the pores are set back relative to said outcrop plane.
Comme polymère anti-adhésif on utilise de préférence du polytétrafluoro-éthylène, connu sous l'abréviation utilisée ci-après de PTFE.As non-stick polymer, polytetrafluoroethylene, known by the abbreviation used below for PTFE, is preferably used.
La mise en oeuvre d'un tel revêtement consiste selon l'invention par exemple en un procédé de surfaçage en deux phases partiellement superposées dont les séquences sont connues. 30 Après un nettoyage adéquat, la surface (2) est traitée par bombardement ou projection thermique de particules quasi-cristallines selon une technique appropriée à la mise en oeuvre de ces alliages pulvérulents.The implementation of such a coating consists according to the invention for example in a surfacing process in two partially superimposed phases whose sequences are known. After an adequate cleaning, the surface (2) is treated by bombardment or thermal spraying of quasi-crystalline particles according to a technique suitable for the use of these pulverulent alloys.
Les conditions de la projection de particules pulvérulentes sont calculées de façon à obtenir la porosité recherchée. La pièce traitée est ensuite revêtue de PTFE et polymérisée au four.The conditions for the projection of powdery particles are calculated so as to obtain the desired porosity. The treated part is then coated with PTFE and polymerized in the oven.
E EN Cette technique n'est donnée qu'à titre indicatif, la mise en oeuvre du revêtement étant possible via plusieurs autres séquences de fabrication.E EN This technique is only given for information, the implementation of the coating being possible via several other manufacturing sequences.
Le revêtement constitué suivant l'invention permet de cumuler les avantages des revêtements quasi-cristallins et des surfaces à base de PTFE, à savoir, qu'il allie : - les bonnes qualités thermiques des quasi-cristaux : le revêtement permet des économies de temps de cuisson et/ou de puissance de l'ordre de 1/3.The coating formed according to the invention makes it possible to combine the advantages of quasi-crystalline coatings and surfaces based on PTFE, namely, that it combines: - the good thermal qualities of quasi-crystals: the coating saves time 1/3 of cooking and / or power.
• la dureté des quasi-cristaux ou όet céramiques : exceptionnelle résistance à l'abrasion, longévité accrue des surfaces de cuisson, dont le revêtement constitue jusqu'à présent le point faible.• the hardness of quasi-crystals or ό and ceramics: exceptional resistance to abrasion, increased longevity of the cooking surfaces, the coating of which has so far been the weak point.
- La réabilitation de surfaces de cuisson comme l'inox, le verre..., inadaptées pour des raisons l o techniques aux dépôts directs de PTFE : la couche quasi-cristalline fonctionne alors également comme couche d'accrochage.- The rehabilitation of cooking surfaces such as stainless steel, glass, etc., unsuitable for technical or technical reasons for direct PTFE deposits: the quasi-crystalline layer then also functions as a bonding layer.
- les propriétés anti-adhésives des PTFE : la surface de contact avec les aliments est majoritairement assurée par le polymère, réduisant au minimum les phénomènes de collage et de gratinage. De plus l'obturation de la porosité par le plymère diminue le piégeage donc la dégradation des- the non-stick properties of PTFE: the contact surface with food is mainly provided by the polymer, reducing to a minimum the phenomena of sticking and gratinating. In addition, the obturation of the porosity by the polymer reduces the trapping therefore the degradation of
15 graisses : le culottage n'est plus nécessaire.15 greases: pelleting is no longer necessary.
- très bonne adhérence du PTFE sur les quasi-cristaux qui servent en particulier de primaire d'accrochage.- very good adhesion of PTFE to quasi-crystals which serve in particular as a bonding primer.
Les propriétés anti-adhérentes du revêtement obtenu selon l'invention peuvent être exploitées pour d'autres application que les surfaces de cuisson ou d'échange de chaleur, et notamment pour 0 toutes les applications où l'on cherche à diminuer l'adhérence mécanique entre deux surfaces, toutes les applications tribologiques pour la résistance aux frottements et à la corrosion.The non-stick properties of the coating obtained according to the invention can be used for other applications than cooking or heat exchange surfaces, and in particular for all applications where it is sought to reduce the mechanical adhesion. between two surfaces, all tribological applications for resistance to friction and corrosion.
A titre d'exemple, on peut appliquer un tel revêtement selon l'invention sur les surfaces d contact d'un ensemble (arbre-palier).For example, such a coating can be applied according to the invention on the contact surfaces of an assembly (shaft-bearing).
CEME CEME

Claims

REVENDICATIONS
1 . Revêtement anti-adhérent par exemple des surfaces pour ustensiles de cuisson caractérisé en ce qu'il met en oeuvre un matériau composite constitué de la combinaison d'une sous-couche en alliage quasi-cristallin et d'un polymère de type PTFE sur une matrice et en ce que la mise en oeuvre est telle que la surface finale présente un maillage quasi-cristallin (2) poreux laissant des alvéoles de PTFE en léger retrait par rapport à la surface.1. Non-stick coating, for example surfaces for cooking utensils, characterized in that it uses a composite material consisting of the combination of an under-layer of quasi-crystalline alloy and of a polymer of PTFE type on a matrix. and in that the implementation is such that the final surface has a porous quasi-crystalline mesh (2) leaving PTFE cells slightly recessed from the surface.
2. Surfaces d'échange de chaleur du type échangeur à plaques, pasteurisateurs, réchauffeurs, plaques de cuisson et analogue, caractérisées en ce qu'elles sont revêtues du revêtement anti- adhérent selon la revendication 1.2. Heat exchange surfaces of the plate exchanger type, pasteurizers, heaters, cooking plates and the like, characterized in that they are coated with the non-stick coating according to claim 1.
3 . Surfaces de pièces mécaniques soumises à des frottements caractérisées en ce qu'elles sont revêtues d'un revêtement anti-adhérent selon la revendication 1.3. Surfaces of mechanical parts subjected to friction, characterized in that they are coated with a non-stick coating according to claim 1.
4 . Surfaces d'ustensiles de cuisson telles que par exemple poêles à frire, plaques à snaquer, grills, gaufriers, parois intérieures de fours, casseroles diverses à usage domestique ou industriel caractérisé en ce qu'elles sont revêtues du revêtement selon la revendication 1.4. Surfaces of cooking utensils such as for example frying pans, cooking plates, grills, waffle irons, interior walls of ovens, various pans for domestic or industrial use characterized in that they are coated with the coating according to claim 1.
DE EMPLACEMENT LOCATION
EP93914815A 1992-07-03 1993-07-05 Quasi-crystal-based composite coating and method for making same Withdrawn EP0602221A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9208411 1992-07-03
FR9208411A FR2693185B1 (en) 1992-07-03 1992-07-03 Composite coating based on quasi-crystals and its manufacturing process.
PCT/FR1993/000691 WO1994001029A1 (en) 1992-07-03 1993-07-05 Quasi-crystal-based composite coating and method for making same

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EP0602221A1 true EP0602221A1 (en) 1994-06-22

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JP (1) JPH06510692A (en)
CA (1) CA2116694A1 (en)
FR (1) FR2693185B1 (en)
WO (1) WO1994001029A1 (en)

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WO1994001029A1 (en) 1994-01-20
FR2693185A1 (en) 1994-01-07
JPH06510692A (en) 1994-12-01
CA2116694A1 (en) 1994-01-20
FR2693185B1 (en) 1994-08-26

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