EP2952266A1 - Procédé de traitement de surfaces, notamment de surfaces de carreaux ou analogues et carreaux produits selon ce procédé - Google Patents

Procédé de traitement de surfaces, notamment de surfaces de carreaux ou analogues et carreaux produits selon ce procédé Download PDF

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Publication number
EP2952266A1
EP2952266A1 EP14171043.4A EP14171043A EP2952266A1 EP 2952266 A1 EP2952266 A1 EP 2952266A1 EP 14171043 A EP14171043 A EP 14171043A EP 2952266 A1 EP2952266 A1 EP 2952266A1
Authority
EP
European Patent Office
Prior art keywords
coating
tiles
tile
hydrophobic
stripes
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Withdrawn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
EP14171043.4A
Other languages
German (de)
English (en)
Inventor
Mirko Zago
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.)
Whirlpool Corp
Original Assignee
Whirlpool Corp
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 Whirlpool Corp filed Critical Whirlpool Corp
Priority to EP14171043.4A priority Critical patent/EP2952266A1/fr
Priority to BR102015007724A priority patent/BR102015007724A2/pt
Publication of EP2952266A1 publication Critical patent/EP2952266A1/fr
Withdrawn legal-status Critical Current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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D1/00—Roof covering by making use of tiles, slates, shingles, or other small roofing elements
    • 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
    • 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
    • B05D2490/00—Intermixed layers
    • B05D2490/60—Intermixed layers compositions varying with a gradient parallel to the surface

Definitions

  • the present invention relates to a method for coating surfaces, particularly for coating tiles which have a decreased permanence of water thereon after wetting.
  • tile we mean whatever manufactured piece of hard-wearing material such as ceramic or stone, generally used for covering roofs, floors, showers, or other objects such as tabletops. Tiles are often used to form floor coverings, and their more common shape is a simple square. Tiles are most often made of ceramic, typically glazed for internal uses and unglazed for roofing, but other materials are also commonly used, such as concrete and other composite materials, and stone. Tiling stone is typically marble, onyx, granite or slate.
  • the solid surface is considered hydrophilic and if the water contact angle is larger than 90°, the solid surface is considered hydrophobic.
  • Many polymers exhibit hydrophobic surfaces.
  • Highly hydrophobic surfaces made of low surface energy (e.g. fluorinated) materials may have water contact angles as high as ⁇ 120°.Some materials with highly rough surfaces may have a water contact angle even greater than 150°, due to the presence of air pockets under the liquid drop. These are called superhydrophobic surfaces.
  • hydrophobic coatings can be based on fluorinated polymers like PTFE (polytetrafluoroethylene) and PFPE (perfluoropolyether) or on methyl groups (-CH3) like PP (polypropylene) or on silicone and fluoride resin.
  • PTFE polytetrafluoroethylene
  • PFPE perfluoropolyether
  • methyl groups -CH3
  • PP polypropylene
  • silicone and fluoride resin silicone and fluoride resin.
  • Super-hydrophobic coatings can be made from many different materials. The following are known as possible bases for the coating:
  • Hydrophilic coatings exhibit water-loving characteristics. Chemically, this means they participate in dynamic hydrogen bonding with surrounding water. Some of the hydrophilic coatings can be based on Nylon 6.6, PET (polyethylene terephthalate), PVC (poly vinyl chloride) or inorganic material such as alumina, titanium dioxide (titania), involving silica and zirconium dioxide (zirconia).
  • the current coatings and process are not able to ensure the right water flow from the tiles surface and moreover they have very low durability, low scratch resistance (due to the low hardness) and they can be damaged (yellowing, cracks) by UV radiation which is able to break polymeric chain bonds. Finally, the organic coating thickness is very high (around 30-50 microns) and this could modify the tiles appeal, changing for example the gloss.
  • An object of the present invention is to provide a method for producing or treating tiles which can overcome the above drawbacks. Such object is reached tanks to a method and a tile having the features listed in the appended claims.
  • the solution according to the invention comprises a deposition process which can be carried out downstream the furnace used for producing tiles.
  • Such process provides an alternation of hydrophobic and hydrophilic areas on the tiles surface in order to guarantee the right water flow along the hydrophilic areas.
  • the applicant has discovered that by having hydrophobic stripes on tiles surface, preferably in a parallel pattern, alternated to hydrophilic stripes, permits the right water flow which come from the hydrophobic stripes comprised between hydrophilic stripes.
  • the method according to the invention does not depend on the material of the tiles and on the specific hydrophilic or hydrophobic coating. Moreover it is not critical if hydrophobic stripes are applied directly on an already hydrophilic surface of the tile or on a previously applied hydrophilic coating covering the entire surface of the tile, or if hydrophilic stripes are applied on a hydrophobic substrate; what really matters it is the surface energy gap between the hydrophilic and hydrophobic areas which should be as highest as possible.
  • a hydrophilic coating is applied on the entire surface of the tiles before applying stripes of hydrophobic coatings.
  • the applicant has also discovered that the dimension of hydrophilic and hydrophobic stripes is quite critical, the width of the hydrophilic stripes being preferably comprised between 1 and 10 mm, more preferably between 2 and 8 mm, with a most preferred value around 5 mm.
  • the width of the hydrophobic stripes is preferably comprised between 10 and 50 mm, more preferably between 20 and 30 mm.
  • the hydrophobic coating 10 shown in figure 2 (where the thickness of coating layer is enlarged for clarity purpose) is directly applied on a upper surface S of a tile T.
  • One of the coating used by the applicant is a hydrophobic coating produced by Diasen.
  • Such coating 10 is applied by spray coating deposition using a stainless steel mask 12 ( figure 4 ) where cut area 12a of the stainless steel sheet correspond to hydrophobic areas of the tile T.
  • Figure 4 is a photo of the stainless mask placed on a tile T.
  • the use of such mask was mainly for experimental purpose, and the applicant has also applied the hydrophobic coating by means of a roll R ( figure 7 ) in the production line of tiles T, for instance after the production furnace, in a zone downstream the furnace where temperature of the tiles is around 120°C.
  • the roll R may have on its surface some helicoidally porous area R1 which can release on the tiles a predetermined amount of coating composition which, due to the movement of the tiles on the conveyor belt of the production line, leaves on the tiles a plurality of stripes inclined by 45° with respect to the advancing direction of the conveyor belt.
  • the 45° inclination of the hydrophobic stripes is the best compromise for having the water flow along hydrophilic stripes independent on how tiles are placed on the ground.
  • the best solution would be to have hydrophilic and hydrophobic stripes parallel to the water flow direction on the tiles due to gravity, which is dependent on the inclination of tiles on ground. But such solution could be problematic for the tiler, since stripes are not visible.
  • It is also possible to indicate a preferred direction of installation by indicating, for instance on the rear surface of the tiles or on an edge thereof, the direction of the stripes so that the tiler can install them in a correct configuration.
  • the thickness thereof is preferably comprised between 0,1 and 2,5 micron, more preferably between 0,25 and 1 micron.
  • FIG 3 shows the case in which a hydrophilic primer 14 is applied to the entire surface S of the tile T, and a plurality of hydrophobic stripes 10 are then applied on such first coating 14.
  • Such hydrophilic coating 14 is preferably based on sol-gel inorganic nano-coatings material such as alumina, titania, involving silica and zirconia, produced by Sumitomo Osaka Cement (SOC).
  • SOC Sumitomo Osaka Cement
  • the total thickness of both coatings 14 and 10 is preferably comprised between 0,2 and 5 micron, more preferably between 0,5 and 2 micron. Higher thickness of the coating can lead to problems in terms of aestetichal changes (gloss alteration and undesired visibility of stripes).
  • Tiles treated with a method according to the invention, and particularly with the double coating of figure 2 have been tested by putting 200 ml of tap water on the surface S and by inclining the tile T of 0,5°.
  • the pattern of tested coating is shown in the following table: Stripes inclination angle Coating type for hydrophilic areas Coating type for hydrophobic areas Hydrophobic stripes dimension Hydrophilic stripes dimension Tiles inclination for total water flow Degree Company Company mm mm Degree 45 SOC-zirconia based Diasen BKK eco 20 2 0,5 45 SOC-zirconia based Diasen BKK eco 20 3 0,5 45 SOC-zirconia based Diasen BKK eco 20 4 0,5 45 SOC-zirconia based Diasen BKK eco 20 5 0,5 45 SOC-zirconia based Diasen BKK eco 20 10 0,5 45 SOC-zirconia based Diasen BKK eco 20 20 0,5 45 SOC-zirconia based Diasen BKK eco 20 30 0,
  • the Diasen BKK Eco hydrophobic coating offers good properties and the SOC-zirconia based coating offers good performances as hydrophilic coating.
EP14171043.4A 2014-06-03 2014-06-03 Procédé de traitement de surfaces, notamment de surfaces de carreaux ou analogues et carreaux produits selon ce procédé Withdrawn EP2952266A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP14171043.4A EP2952266A1 (fr) 2014-06-03 2014-06-03 Procédé de traitement de surfaces, notamment de surfaces de carreaux ou analogues et carreaux produits selon ce procédé
BR102015007724A BR102015007724A2 (pt) 2014-06-03 2015-04-07 método para o tratamento de superfícies, particularmente superfícies de telhas ou similares, e telhas produzidas de acordo com tal método

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14171043.4A EP2952266A1 (fr) 2014-06-03 2014-06-03 Procédé de traitement de surfaces, notamment de surfaces de carreaux ou analogues et carreaux produits selon ce procédé

Publications (1)

Publication Number Publication Date
EP2952266A1 true EP2952266A1 (fr) 2015-12-09

Family

ID=50842171

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14171043.4A Withdrawn EP2952266A1 (fr) 2014-06-03 2014-06-03 Procédé de traitement de surfaces, notamment de surfaces de carreaux ou analogues et carreaux produits selon ce procédé

Country Status (2)

Country Link
EP (1) EP2952266A1 (fr)
BR (1) BR102015007724A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113735561A (zh) * 2021-08-16 2021-12-03 蒙娜丽莎集团股份有限公司 一种仿荷叶的疏水防潮陶瓷砖及其制备方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999057185A1 (fr) * 1998-05-04 1999-11-11 3M Innovative Properties Company Article a motifs comprenant des zones de surface alternees hydrophiles et hydrophobes
US20030108725A1 (en) * 2001-12-10 2003-06-12 Matthew Hamilton Visual images produced by surface patterning
US20030207090A1 (en) * 2002-05-01 2003-11-06 Arora Pramod K. Invisible logos using hydrophobic and hydrophilic coatings on substrates
WO2004083490A2 (fr) * 2003-03-21 2004-09-30 The University Of North Carolina At Chapel Hill Procedes et appareil pour le depot structure de materiaux contenant des nanostructures par auto-assemblage et articles associes
WO2005075112A1 (fr) * 2004-02-10 2005-08-18 Multi Sign A/S Revetement de surface aux proprietes inhibant la formation de rosee et de glace
EP1967667A1 (fr) * 2007-03-07 2008-09-10 CSR limited Tuile de toiture
FR2935326A1 (fr) * 2008-08-28 2010-03-05 Peugeot Citroen Automobiles Sa Vehicule automobile comportant une face exposee au ruisselement de l'eau
US20120121858A1 (en) * 2009-05-25 2012-05-17 Kawamura Institue of Chemical Research Hydrophobic film, patterned film having hydrophobic and hydrophilic regions, and method for producing the same

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999057185A1 (fr) * 1998-05-04 1999-11-11 3M Innovative Properties Company Article a motifs comprenant des zones de surface alternees hydrophiles et hydrophobes
US20030108725A1 (en) * 2001-12-10 2003-06-12 Matthew Hamilton Visual images produced by surface patterning
US20030207090A1 (en) * 2002-05-01 2003-11-06 Arora Pramod K. Invisible logos using hydrophobic and hydrophilic coatings on substrates
WO2004083490A2 (fr) * 2003-03-21 2004-09-30 The University Of North Carolina At Chapel Hill Procedes et appareil pour le depot structure de materiaux contenant des nanostructures par auto-assemblage et articles associes
WO2005075112A1 (fr) * 2004-02-10 2005-08-18 Multi Sign A/S Revetement de surface aux proprietes inhibant la formation de rosee et de glace
EP1967667A1 (fr) * 2007-03-07 2008-09-10 CSR limited Tuile de toiture
FR2935326A1 (fr) * 2008-08-28 2010-03-05 Peugeot Citroen Automobiles Sa Vehicule automobile comportant une face exposee au ruisselement de l'eau
US20120121858A1 (en) * 2009-05-25 2012-05-17 Kawamura Institue of Chemical Research Hydrophobic film, patterned film having hydrophobic and hydrophilic regions, and method for producing the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113735561A (zh) * 2021-08-16 2021-12-03 蒙娜丽莎集团股份有限公司 一种仿荷叶的疏水防潮陶瓷砖及其制备方法

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