EP2308607A1 - Montage de revêtement - Google Patents
Montage de revêtement Download PDFInfo
- Publication number
- EP2308607A1 EP2308607A1 EP20100187278 EP10187278A EP2308607A1 EP 2308607 A1 EP2308607 A1 EP 2308607A1 EP 20100187278 EP20100187278 EP 20100187278 EP 10187278 A EP10187278 A EP 10187278A EP 2308607 A1 EP2308607 A1 EP 2308607A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- layer
- microstructured
- substrate
- fluoropolymer
- contact angle
- 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.)
- Granted
Links
- 238000000576 coating method Methods 0.000 title claims abstract description 48
- 239000011248 coating agent Substances 0.000 title claims abstract description 44
- 239000000758 substrate Substances 0.000 claims abstract description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 230000000181 anti-adherent effect Effects 0.000 claims abstract description 10
- 239000004033 plastic Substances 0.000 claims abstract description 8
- 229920003023 plastic Polymers 0.000 claims abstract description 8
- 239000010954 inorganic particle Substances 0.000 claims abstract description 7
- 239000000853 adhesive Substances 0.000 claims abstract description 6
- 230000001070 adhesive effect Effects 0.000 claims abstract description 6
- 239000011146 organic particle Substances 0.000 claims abstract description 6
- 229920002313 fluoropolymer Polymers 0.000 claims description 43
- 239000004811 fluoropolymer Substances 0.000 claims description 41
- 238000000034 method Methods 0.000 claims description 28
- 239000000843 powder Substances 0.000 claims description 19
- 239000002245 particle Substances 0.000 claims description 15
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 238000010285 flame spraying Methods 0.000 claims description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 239000011651 chromium Substances 0.000 claims description 4
- 239000013589 supplement Substances 0.000 claims description 4
- 238000007751 thermal spraying Methods 0.000 claims description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 2
- 239000011224 oxide ceramic Substances 0.000 claims description 2
- 229910052574 oxide ceramic Inorganic materials 0.000 claims description 2
- 229910010413 TiO 2 Inorganic materials 0.000 claims 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 229910010271 silicon carbide Inorganic materials 0.000 abstract description 5
- 229920012287 polyphenylene sulfone Polymers 0.000 abstract description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 abstract 2
- 229910052731 fluorine Inorganic materials 0.000 abstract 2
- 239000011737 fluorine Substances 0.000 abstract 2
- 229920000642 polymer Polymers 0.000 abstract 2
- 239000010410 layer Substances 0.000 description 95
- 239000004813 Perfluoroalkoxy alkane Substances 0.000 description 16
- 229920011301 perfluoro alkoxyl alkane Polymers 0.000 description 16
- 239000000463 material Substances 0.000 description 13
- 239000004812 Fluorinated ethylene propylene Substances 0.000 description 9
- 229920009441 perflouroethylene propylene Polymers 0.000 description 9
- 240000002853 Nelumbo nucifera Species 0.000 description 8
- 229910052593 corundum Inorganic materials 0.000 description 8
- 239000010431 corundum Substances 0.000 description 8
- 239000004810 polytetrafluoroethylene Substances 0.000 description 8
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 8
- 238000005245 sintering Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 239000006185 dispersion Substances 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 238000001878 scanning electron micrograph Methods 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 238000005488 sandblasting Methods 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 4
- 239000002041 carbon nanotube Substances 0.000 description 4
- 229910021393 carbon nanotube Inorganic materials 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 4
- 229920001296 polysiloxane Polymers 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 230000002209 hydrophobic effect Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002086 nanomaterial Substances 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 210000003298 dental enamel Anatomy 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- -1 for example Polymers 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- PEVRKKOYEFPFMN-UHFFFAOYSA-N 1,1,2,3,3,3-hexafluoroprop-1-ene;1,1,2,2-tetrafluoroethene Chemical compound FC(F)=C(F)F.FC(F)=C(F)C(F)(F)F PEVRKKOYEFPFMN-UHFFFAOYSA-N 0.000 description 1
- 241000251468 Actinopterygii Species 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004962 Polyamide-imide Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 241000220317 Rosa Species 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 241001422033 Thestylus Species 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009503 electrostatic coating Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000001023 inorganic pigment Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910000623 nickel–chromium alloy Inorganic materials 0.000 description 1
- 239000006259 organic additive Substances 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- 229920001601 polyetherimide Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- 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
-
- 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
- B05D5/02—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a matt or rough surface
-
- 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
- B05D2350/30—Change of the surface
- B05D2350/33—Roughening
- B05D2350/38—Roughening by mechanical means
-
- 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
- B05D2350/65—Adding a layer before coating metal 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
- B05D2601/00—Inorganic fillers
- B05D2601/20—Inorganic fillers used for non-pigmentation effect
-
- 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
- B05D2602/00—Organic fillers
-
- 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
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
Definitions
- the invention relates to a non-stick coating for a surface of a substrate containing at least one fluoropolymer and to a process for its preparation.
- a non-stick coating is to be understood as meaning a layer structure which is such that it is particularly suitable, in particular, for rolls or other machine parts in the adhesive, rubber and / or paint-processing industry.
- Good non-stick properties are particularly relevant where certain areas, such as labels, adhesive tapes, diapers and other products, are said to have the property of preventing adhesion of adhesive or other sticky media. This allows targeted adhesive areas to be created while the neighboring areas can not stick. That is, the adhesive or other sticky media can be applied by machine targeted and localized.
- the corresponding coated tools such as rolls in the paper industry for producing multilayer or laminated paper remain adhesive-free.
- the silicone-coated surfaces in this way have no resistance to solvents and corrosion. Furthermore, these surfaces are not approved for food applications. Finally, due to the material properties of the silicone, a corresponding surface is also out of the question for some applications. In coating applications (eg in car painting) such a coated surface is unsuitable because the paint is repelled by the silicone and so it comes to the formation of so-called "fish eyes". The disadvantage is finally that the hardness of the surface is relatively low.
- fluoroplastics for example Teflon
- Teflon fluoroplastics
- the fluoroplastic is sintered on a carrier layer at elevated temperatures (about 400 ° C) in order to obtain a stable composite. Due to the flow of the fluoropolymer in the course of the sintering process, however, the basic structure of the substrate is leveled; a lotus effect can not be obtained in this way.
- EP 0 485 801 B1 discloses a heat exchanger having a plurality of plate-shaped ribs. On the fin surface is applied a mixture consisting of a silicone resin compound-containing solution and finely divided inorganic particles. Silicon is used as base layer. Furthermore, it is provided that the surface of the layer has regularly distributed micro-elevations.
- the DE 35 44 211 A1 discloses a method of making an iron sole. As a result of the sequence of different method steps, a metallic carrier substrate is provided with a low-adhesion plastic surface which is as smooth as possible and sealed. For sealing a binder of organic type is used.
- an article which consists of metal, ceramic, enamel or glass and which is provided with an at least single-layer coating, the inorganic and / or organic pigment, fluoropolymer and as binder resin at least one of the type of polyamide-imides, polyimides, polyetherimides and similar substances having.
- the specification of the coating is predetermined both with regard to the amounts of the constituents and with regard to their particle size.
- a method is known in which a layer of a plastic material is applied to a substrate with a structured surface, wherein the surface of the layer is provided with a plurality of substantially regularly distributed micro-bumps by the plastic material before application to the substrate components in an amount of 10 to 30 wt .-% and a particle size of 2 to 200 microns are added.
- a water contact angle of 128 ° is given.
- Substrates here and below are understood in particular to be those which at least partially consist of metal, ceramic, glass, enamel or a composite material thereof, but also those of other suitable materials. Materials are particularly suitable as part of a substrate, provided that they are sufficiently thermally stable at temperatures that occur in an optionally provided sintering process.
- An anti-adhesive plastic is understood here and below as meaning, in particular, a fluoropolymer such as, for example, polytetrafluoroethylene (PTFE), perfluoroalkoxyalkane (PFA), perfluoroethylene-propylene copolymer (FEP), but also other suitable materials which contain perfluorinated carbon chains and have comparable hydrophobic properties.
- a fluoropolymer such as, for example, polytetrafluoroethylene (PTFE), perfluoroalkoxyalkane (PFA), perfluoroethylene-propylene copolymer (FEP), but also other suitable materials which contain perfluorinated carbon chains and have comparable hydrophobic properties.
- a microstructured substrate is understood here and below to mean one having a roughness in the micrometer range, in particular in the range from 2 to 50 ⁇ m Ra.
- the substrate may be formed by the substrate itself, but also by a layer applied or applied to the substrate.
- a hierarchical layer structure is understood to be one in which a second surface structure of a second layer is superimposed on a first layer having a first surface structure, without the first surface structure being leveled out in the process.
- a first microstructured layer of the hierarchical layer structure is understood to be one with micro-elevations in the range of 2 to 50 ⁇ m, under a submicrostructured second layer, which overlays the first one, with elevations, in particular in a range of 0.1 to 5 ⁇ m, of which Elevations are smaller than the elevations of the first microstructured layer.
- the first microstructured layer contains a supplement of 5 to 30 wt .-% organic and / or inorganic particles, in particular polyphenylene sulfone (PPSO 2 ) or silicon carbide (SiC) to produce an additional structuring of the layer.
- PPSO 2 polyphenylene sulfone
- SiC silicon carbide
- Water contact angle of> 165 ° with a hysteresis and a drain angle, which go to 0, are possible with the non-stick coating according to the invention. This is how the pull-off force of a Tesa® - Tapes of a surface coated with the non-stick coating according to the invention go to zero.
- the microstructured substrate is preferably produced by applying a microstructured layer to a macrostructured surface.
- the surface of the substrate may already have a macrostructure of its own if it has a corresponding roughness.
- the macrostructure can also be predetermined by the nature of the substrate, as for example in the case of a fine wire mesh. It is also possible to produce a suitable macrostructure of the substrate surface, for example by sand blasting or else by placing and fastening a macrostructured grid fabric.
- a macrostructured surface can be produced by thermal spraying of a macrostructured layer onto the substrate, in particular by flame spraying of a metal wire or metal powder such as chromium / nickel wire or molten chromium / nickel powder.
- the microstructured layer of the microstructured substrate is preferably formed on the macrostructured surface by application of oxide ceramics, in particular titanium oxide (TiO 2 ) and / or aluminum oxide (Al 2 O 3 ), more preferably by thermal spraying.
- oxide ceramics in particular titanium oxide (TiO 2 ) and / or aluminum oxide (Al 2 O 3 ), more preferably by thermal spraying.
- the microstructured layer of the microstructured substrate can also be applied to a microstructured substrate surface, the structure of which is preferably produced by sandblasting, wherein the roughness of the surface, as in the production of a macrostructured substrate surface, can be influenced by the grain size of the selected corundum (from FIG Fine corundum to coarse corundum).
- At least one first microstructured layer is produced on the microstructured substrate by applying a powder containing at least one fluoropolymer having a particle size in the range from 500 nm to 30 ⁇ m, the powder preferably being heated exactly after application will cause the powder grains to melt on the ground and bond to it, but essentially retain their shape. This prevents the valleys and cavities resulting from the microstructure of the subsurface from being added by the microstructured fluoropolymer layer.
- Fillers in the microstructured fluoropolymer layer additionally structure the microstructured layer. It is advantageous if the powder is an admixture of inorganic particles such as in particular of SiC or Al 2 SO 3 and / or organic particles such as polyamides or PPSO 2 , or mixtures thereof, preferably in a proportion of 5 to 30 wt .-%. , contains. The particles provide for an improved microstructure and at the same time for a sufficient mechanical stability of the coating.
- the first microstructured fluoropolymer layer is preferably applied in coating thicknesses of 5 to 15 ⁇ m per application. Multiple application is possible and useful, a preferred layer thickness is 20 microns - 50 microns.
- the second sub-microstructured layer which preferably has a nanostructure whose protrusions are smaller than 1 ⁇ m, is preferably formed by applying a finely dispersed fluoropolymer having a grain size of 90-300 nm to the microstructured first fluoropolymer layer. Also, when baking this second layer, it is advantageous if the coating is just heated so that the particles of the second layer are merely fused so that they combine with the underlying layer, but essentially retain their shape.
- the finely dispersed fluoropolymer contains an addition of whiskers, in particular of potassium titanate whiskers, and / or of carbon nanotubes, preferably in a proportion of from 5 to 40% by weight, in particular with respect to potassium titanate whiskers preferably in a proportion of 10 to 40 wt .-%.
- whiskers in particular of potassium titanate whiskers, and / or of carbon nanotubes, preferably in a proportion of from 5 to 40% by weight, in particular with respect to potassium titanate whiskers preferably in a proportion of 10 to 40 wt .-%.
- a primer layer may be provided whose thickness is preferably not more than 5 ⁇ m and not less than 1 ⁇ m.
- the hierarchical layer structure is applied to a microstructured substrate.
- This microstructured substrate may already be present through the substrate surface, but is usually produced by a treatment and / or coating of the substrate surface, in particular by producing a hard base layer.
- the surfaces of an aluminum body, a stainless steel body and a normal steel body after they have been degreased, first sandblasted with coarse corundum (Al 2 O 3 ). Sandblasting removed surfaces from any oxide layers and other contaminants. In addition, the surfaces have been given a first structure that allows mechanical bonding to the body surface of a subsequent coating applied by, for example, thermal spray as described below.
- Table 1 Coarse corundum radiation on aluminum Coarse corundum radiation on stainless steel Coarse corundum radiation on normal steel
- R a ( ⁇ m) 5.67 2.78 4.53
- R z ( ⁇ m) 35.43 17.45 29,47
- R max ( ⁇ m) 43.48 20.59 32.06
- R Sk -0.53 0.24 0.19
- the surfaces were flame-sprayed with a ceramic powder of the type AC130 (Metco 130) from Sulzer-Metco. This produces a finer surface structure, which already results from the particle size of the powder, which is in the range of 5 to 30 ⁇ m.
- the roughness values of the resulting surface are shown in Table 3.
- the roughness is constructed according to the Gaussian normal distribution and is quite uniform according to the procedure.
- Table 3 R a ( ⁇ m) 5.08 R z ( ⁇ m) 31,99 R max ( ⁇ m) 46.58 R Sk 0.37 R Ku 3.96
- a hydrophobic layer structure was then applied to the microstructured substrate produced in the present case.
- fluoropolymers PTFE, PFA and also FEP were used. All three materials are fully fluorinated plastics, which in some properties, such. B. in the melting point, different.
- the fluoropolymer was applied as a powder by electrostatic coating. Coating took place in several processes up to a layer thickness of 20 ⁇ m-50 ⁇ m. The powder layers follow the contour of the basic structure after application.
- the fluoropolymers After application of the fluoropolymers, they were sintered, i. H. they were brought above their melting point to achieve a fusion.
- the temperature during sintering is usually at least 20 ° C, usually usually at least above 50 ° C above the melting point.
- a supplement of 5% PPSO 2 , 5% SiC or 20% PPSO 2 was added to the fluoropolymer powder used for coating.
- PPSO 2 is particularly well because of its high melting point, which is above 400 ° C, particularly good.
- the PPSO 2 used had a mean diameter of 20 ⁇ m.
- a water contact angle of 140 ° and a drain angle of 12 ° were measured.
- a water contact angle of 144 ° and a drain angle of 12 ° were measured.
- a water contact angle of 156 ° and a drain angle of 21 ° were measured.
- a fluoropolymer dispersion was then sprayed onto a pattern with a hierarchically constructed hard base structure of Metco 36C and Metco 130 applied in the manner described above and onto which a microstructured first layer of PFA fluoropolymer powder with 20% PPSO 2 aggregate was applied.
- a grain size of 90 nm - 150 nm at a surface temperature of the first microstructured layer of 100 ° C and then sintering the layer at a temperature of 360 ° C for 10 minutes has been achieved that solidified particles in the size of about 500 nm to 5 microns form at the surface. These so-called clusters are firmly fused to the underlying fluoropolymer.
- the resulting microstructures have a diameter of about 25 microns and a height of about 20 microns. In other test patterns microstructures with a diameter of approx. 25 ⁇ m and a height of up to 100 ⁇ m were achieved. The distances of the elevations are about 30 - 50 microns and can be up to about 100 microns.
- the submicrostructures formed by the clusters are approximately 2 to 5 ⁇ m high and approximately 10 to 15 ⁇ m long. Scanning electron micrographs of the surface are in FIG. 3 (250x magnification) and FIG. 3a (1000x magnification) to see.
- a Fluoropolymerdispersion was sprayed with 30 wt % of a whisker, here a potassium titanate whisker.
- the whiskers had a diameter of the order of 150 to 300 nm and a length of the order of 1 to 5 ⁇ m.
- the PFA dispersion had a particle size of 90-150 nm.
- the dispersion mixture was applied to the over 100 ° hot surface of the sample under high atomization pressure with a spray gun.
- the water of the dispersion evaporated immediately upon impact with the workpiece, and the Whisker PFA particles were thrown onto the surface. Subsequently, the layer was firmly bonded to the underlying PFA layer by sintering at a temperature of 360 ° C for 10 minutes. The embedded whisker creates the desired structure.
- the whisker structure is mechanically stable. Over a 90 ° -Peeltest with a Tesa ® -Testklebeband (Tesa test tape for testing surfaces no. 07475) can not remove the structure.
- the generated surface (see FIG. 4 (250x magnification) and FIG. 4a (1000x magnification)) has microstructures with a diameter in the range of 30 microns, which are at a distance of about 50-100 microns to each other and whose height is about 20-70 microns.
- the superimposed submicron coating has structures that are oriented based on the fibers.
- the diameter of the fibers is about 300-500 nm, their length is about 1 - 5 microns.
- the water contact angle of the coating thus produced is 175 °, the outlet angle 0 °.
- the roughness characteristics of this surface structure are particularly high.
- R a is about 8 ⁇ m
- the coated plate When determining the rolling angle, the coated plate was covered with a water droplet with a volume of 60 ⁇ l. The plate, or the entire device, was tilted until the drop began to roll off. This angle is the roll-off angle.
- test plate was covered with a water drop with a volume of 60 ⁇ l. The plate was tilted until just before the roll-off angle. In this case, two different contact angles are formed. The one on the slope facing, the other on the opposite side. The contact angles were determined in the manner described above, but the method Tangent 2 was used for the calculation.
- FIG. 4b The surface structure shown was produced substantially the same as that in FIGS. 4 and 4a surface structure shown with the only difference that instead of potassium titanate whiskers carbon nanotubes were added to the fluoropolymer dispersion in the same amount.
- FIG. 5 By way of example, a cross section of a surface coated according to the invention is shown schematically.
- a sandblasted metal substrate which has a microstructure with elevations of about 40 microns, a first layer of the material Metco® 36C and thereon a second layer of the material Metco 130 by flame spraying applied, thereon a primer layer.
- the two flame-sprayed layers and the primer layer form a microstructured substrate, to which a hierarchical structure of a microstructured first layer of PFA or FEP, which is mixed with PPS02 fillers, and a superimposed sub-microstructured second layer of individual clusters of PFA / FEP are applied ,
- the Metco 36 layer has a thickness of about 40-80 ⁇ m
- the Metco 130 layer has a thickness of about 30-80 ⁇ m
- the primer layer has a thickness of about 5 ⁇ m.
- the microstructured fluoropolymer layer of the hierarchical layer structure has a thickness of 20-40 microns and the clusters of submicrostructured fluoropolymer layer has a height of about 5 microns.
- the roughness of the microstructured inorganic layer is not equalized by the microstructured fluoropolymer layer. Rather, the roughness of the first microstructured inorganic layer is complemented by the roughness of the second microstructured fluoropolymer layer. So have the elevations of the surface coating a height of about 50 - 100 microns, and their maxima are spaced about 50 - 150 microns apart.
- the clusters of the submicrostructured fluoropolymer layer additionally roughen the surface.
- FIG. 6 is one to which FIG. 5 similar layer structure shown schematically.
- the layer structure differs only in the submicrostructured layer which is formed in place of PFA / FEP clusters with potassium titanate whiskers.
- the elevations of the surface coating have a height of about 50 - 130 microns, and their maxima are spaced about 50 - 150 microns apart.
- the potassium titanate whiskers or the carbon nanotubes of the submicrostructured layer additionally roughen the surface.
- a rose structure is produced, which in the illustrated example has been produced with a layer structure on an aluminum-based substrate. It can be produced, for example, by applying a PTFE layer as a submicrostructured layer to a layer structure of microstructured substrate and first, microstructured layer.
- the microstructured substrate is produced by sandblasting (preferably with fine or coarse corundum) an aluminum or aluminum alloy surface, resulting in a microstructured substrate surface.
- the substrate surface is anodically oxidized, so that an anodized layer or, preferably, a hard-anodal layer is produced. This forms a substrate with an inorganic microstructure.
- a spray gun By means of a spray gun, dispersions of PFA, FEP or PTFE are applied to the inorganic structure to produce the first, microstructured layer.
- the application of the submicron and / or nanostructure is carried out in the same way as stainless steel substrates.
- the florets structure arises during a special time-temperature sintering cycle.
- PTFE is sintered at 380 to 400 ° C for 15 minutes.
- a significantly lower temperature preferably as in the present example of 340 ° C., is chosen over a much longer period of time, preferably 2 hours as in the present example.
- the elevations have a diameter of 1 to 3 microns.
- the height is about 500 nm to 2 microns.
- the distance from each other is 2 to 10 microns.
- the formation of these structures is reproducible and can be detected on various PTFE surfaces.
- the water contact angle is 168 ° with a drainage angle of 3 °.
- FIGS. 8a and 8b the scheme of the layer structure on an aluminum-containing substrate is shown with a Harteloxal harsh.
- the substrate surface is microstructured and has elevations in a height of about 40 microns.
- the hard-anodal layer produced on the substrate surface is approximately 50 ⁇ m thick.
- a primer layer having a thickness of about 2 ⁇ m is applied, whereupon a fluoropolymer layer having a thickness of about 5 ⁇ m is arranged.
- the microstructure of the fluoropolymer layer corresponds approximately to the microstructure of the metal substrate.
- FIGS. 8a and 8b Surface coatings shown differed by the submicrostructured layer applied to the microstructured fluoropolymer layer FIG. 8a formed by PFA or FEP cluster with a height of about 5 microns, while the surface in FIG. 8b whisker with a length of about 5 microns and a diameter of about 150 - 300 nm is additionally structured.
- the surface may also be referenced with reference to FIG. 7 be described submicrostructured Röschen Modell.
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DE102009049137A DE102009049137A1 (de) | 2009-10-12 | 2009-10-12 | Beschichtungsaufbau |
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EP2308607A1 true EP2308607A1 (fr) | 2011-04-13 |
EP2308607B1 EP2308607B1 (fr) | 2016-03-23 |
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EP10187278.6A Active EP2308607B1 (fr) | 2009-10-12 | 2010-10-12 | Montage de revêtement |
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US (1) | US20110212296A1 (fr) |
EP (1) | EP2308607B1 (fr) |
DE (1) | DE102009049137A1 (fr) |
DK (1) | DK2308607T3 (fr) |
ES (1) | ES2568772T3 (fr) |
PL (1) | PL2308607T3 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2013014393A1 (fr) | 2011-07-25 | 2013-01-31 | Seb Sa | Article chauffant comprenant un revêtement thermostable microstructuré et procédé de fabrication d'un tel article. |
EP2957352A3 (fr) * | 2014-06-16 | 2016-03-09 | Ryong Kim | Appareil de cuisine revêtu par procédé à points et son procédé de préparation |
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Publication number | Priority date | Publication date | Assignee | Title |
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DE102011119731A1 (de) * | 2011-11-30 | 2013-06-06 | Rhenotherm Kunststoffbeschichtungs Gmbh | PEK und/oder PEEK enthaltende Beschichtung |
DE102012002608B4 (de) * | 2012-02-13 | 2017-01-19 | Warimex Waren-Import Export Handels-Gmbh | Pfanne oder Kochtopf |
KR101660886B1 (ko) * | 2012-07-13 | 2016-09-28 | 도요세이칸 그룹 홀딩스 가부시키가이샤 | 내용물에 대한 미끄러짐성이 뛰어난 포장용기 |
US20140069708A1 (en) * | 2012-09-07 | 2014-03-13 | Jörg Gross | Coated sensor or rfid-housing |
DE202012103420U1 (de) | 2012-09-07 | 2012-10-09 | Balluff Gmbh | Beschichtetes Sensor- oder RFID-Gehäuse |
DE202012103416U1 (de) | 2012-09-07 | 2012-10-09 | Balluff Gmbh | Beschichtetes Sensor- oder RFID-Gehäuse |
DE202012103419U1 (de) | 2012-09-07 | 2012-10-09 | Balluff Gmbh | Beschichtetes Sensor- oder RFID-Gehäuse |
DE202012103418U1 (de) | 2012-09-07 | 2012-10-09 | Balluff Gmbh | Beschichtetes Sensor- oder RFID-Gehäuse |
DE102013104646A1 (de) | 2013-05-06 | 2014-11-06 | Saeed Isfahani | Keramikbeschichtung von Kunststoff |
US9809712B2 (en) * | 2013-11-26 | 2017-11-07 | Baker Hughes, A Ge Company, Llc | Hydrophobic and oleophobic coatings |
DE102016205318A1 (de) * | 2016-03-31 | 2017-10-05 | BSH Hausgeräte GmbH | Oberflächenbeschichtung für hochwertige Weiß- und/oder Grauware |
DE102022121015B3 (de) | 2022-08-19 | 2024-02-15 | Stc Spinnzwirn Gmbh | Fibrillierwalze und Fibrillierverfahren |
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- 2010-10-12 DK DK10187278.6T patent/DK2308607T3/da active
- 2010-10-12 US US12/902,701 patent/US20110212296A1/en not_active Abandoned
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- 2010-10-12 PL PL10187278.6T patent/PL2308607T3/pl unknown
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013014393A1 (fr) | 2011-07-25 | 2013-01-31 | Seb Sa | Article chauffant comprenant un revêtement thermostable microstructuré et procédé de fabrication d'un tel article. |
FR2978340A1 (fr) * | 2011-07-25 | 2013-02-01 | Seb Sa | Article chauffant comprenant un revetement thermostable microstructure et procede de fabrication d'un tel article |
CN103702773A (zh) * | 2011-07-25 | 2014-04-02 | Seb公司 | 包含微观构造热稳定涂层的加热用品及其制备方法 |
CN103702773B (zh) * | 2011-07-25 | 2016-08-31 | Seb公司 | 包含微观构造热稳定涂层的加热用品及其制备方法 |
RU2598085C2 (ru) * | 2011-07-25 | 2016-09-20 | Себ Са | Нагревательное изделие с микроструктурным термостойким покрытием и способ изготовления такого изделия |
EP2957352A3 (fr) * | 2014-06-16 | 2016-03-09 | Ryong Kim | Appareil de cuisine revêtu par procédé à points et son procédé de préparation |
Also Published As
Publication number | Publication date |
---|---|
DE102009049137A1 (de) | 2011-04-14 |
ES2568772T3 (es) | 2016-05-04 |
DK2308607T3 (da) | 2016-06-27 |
US20110212296A1 (en) | 2011-09-01 |
EP2308607B1 (fr) | 2016-03-23 |
PL2308607T3 (pl) | 2016-09-30 |
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