WO2005070544A2 - Dispositif pour reduire des forces capillaires - Google Patents

Dispositif pour reduire des forces capillaires Download PDF

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Publication number
WO2005070544A2
WO2005070544A2 PCT/DE2005/000124 DE2005000124W WO2005070544A2 WO 2005070544 A2 WO2005070544 A2 WO 2005070544A2 DE 2005000124 W DE2005000124 W DE 2005000124W WO 2005070544 A2 WO2005070544 A2 WO 2005070544A2
Authority
WO
WIPO (PCT)
Prior art keywords
solid body
adjacent
hydrophobic
forces
liquid
Prior art date
Application number
PCT/DE2005/000124
Other languages
German (de)
English (en)
Other versions
WO2005070544A3 (fr
Inventor
Horst Sonnendorfer
Franz Wieth
Original Assignee
Horst Sonnendorfer
Franz Wieth
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 Horst Sonnendorfer, Franz Wieth filed Critical Horst Sonnendorfer
Priority to DE112005000597T priority Critical patent/DE112005000597D2/de
Publication of WO2005070544A2 publication Critical patent/WO2005070544A2/fr
Publication of WO2005070544A3 publication Critical patent/WO2005070544A3/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C08L27/18—Homopolymers or copolymers or tetrafluoroethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers

Definitions

  • the invention relates to a device according to the preamble of claim 1.
  • boundary forces occur between a liquid which comes into contact with parts of the known device and the device adhesion.
  • forces called cohesion act between the molecules, which, viewed over a time average, cancel each other out in magnitude and direction.
  • the cohesive forces of near-surface molecules do not completely cancel each other out and a non-vanishing resulting force acts on the near-surface molecules.
  • the liquid takes the form of a sphere.
  • the surface is minimized in terms of volume.
  • the number of molecules near the surface in which the cohesive forces are not compensated for over time as described above is lowest in this form.
  • the figure shows an enlarged section of a housing 1, as it can occur in principle at the contact zone between the basic housing 2 and cover 3 of the housing 1.
  • the interior of the housing 1, not shown in the picture, extends to the right side.
  • a layer 2b or 3b of hydrophobic material for example polytetrafluoroethylene (PTFE), is applied to the surface 2a of a basic housing 2 and to the surface 3a of the cover 3.
  • PTFE polytetrafluoroethylene
  • the water 5 lying on the outside of the housing 1 cannot penetrate into the gap 4, because between the water 5 and the hydrophobic layers 2b and 3b, the material does not have such a high adhesive force that would suffice to overcome the cohesive force of water and that Deform water so that it gets into the interior of the housing through the gap 4 due to the capillary action.
  • the layers 2b and 3b can be produced, for example, by subsequent application of polytetrafluoroethylene (PTFE) or by injection molding processing of polytetrafluoroethylene (PTFE) in the form of PTFE-PA in the area of the areas 2a and 3a. Due to the good adhesion of polytetrafluoroethylene - polyamide (PTFE-PA) to polyamide (PA), the workpiece can be manufactured inexpensively using the two-component injection molding process. The majority of the workpiece consists of PA and only the areas 2b, 3b consist of PTFE-PA. It is also possible to generate the hydrophobic regions 2b, 3b by using so-called nanoparticles. These nanoparticles can be attached to the surface during the spraying process, for example, by covering the inner surface of the tool with these nanoparticles. The nanoparticles are then transferred from the tool to the workpiece and remain fixed in it.
  • PTFE polytetrafluoroethylene
  • PTFE-PA polytetrafluor
  • a combination of the use of PTFE-PA and nanoparticles can result in a super-hydrophobic surface at low cost. Such a surface may be self-cleaning.
  • the water 5 on the housing 1 would have to change its outer shape in order to get into the gap 4.
  • This change in shape would inevitably involve an increase in surface area and would require the presence of an adhesive force.
  • the gap 4 in an inventive manner consists of a material which is hydrophobic, these adhesive forces do not occur sufficiently strongly and the water is not drawn into the gap 4.
  • the gap 4 is therefore not permeable to water in liquid form, but it is permeable to water in gaseous form. Another advantage of the invention can therefore be seen in the fact that the gap can also be used as a valve for condensation water in the housing.
  • One possible use is to prevent water from entering behind display panels, such as timetable holders at free-standing stops or other glazed advertising spaces.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Chemically Coating (AREA)

Abstract

Une force d'adhésion d'exerçant entre les molécules proches de la surface et le corps solide avec lequel le liquide est en contact permet d'aspirer le liquide qui se trouve entre deux surfaces étroitement voisines d'un corps solide. La présente invention concerne un revêtement correspondant sur le corps solide, présentant une couche mince de matière hydrophobe, qui permet d'empêcher l'apparition de cette force d'adhésion.
PCT/DE2005/000124 2004-01-27 2005-01-27 Dispositif pour reduire des forces capillaires WO2005070544A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112005000597T DE112005000597D2 (de) 2005-01-27 2005-01-27 Vorrichtung zum Verringern von Kapillarkräften

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200420001229 DE202004001229U1 (de) 2004-01-27 2004-01-27 Vorrichtung zum Verringern von Kapillarkräften
DE202004001229.4 2004-01-27

Publications (2)

Publication Number Publication Date
WO2005070544A2 true WO2005070544A2 (fr) 2005-08-04
WO2005070544A3 WO2005070544A3 (fr) 2005-09-01

Family

ID=34684148

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2005/000124 WO2005070544A2 (fr) 2004-01-27 2005-01-27 Dispositif pour reduire des forces capillaires

Country Status (2)

Country Link
DE (1) DE202004001229U1 (fr)
WO (1) WO2005070544A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8830662B2 (en) 2011-03-01 2014-09-09 Apple Inc. Electronic devices with moisture resistant openings

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014110603B4 (de) * 2014-07-28 2019-09-12 Martin Koepsell Gehäuse mit abgedichtetem Innenraum

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000091021A (ja) * 1998-09-10 2000-03-31 Harness Syst Tech Res Ltd 防水コネクタ
JP2000154620A (ja) * 1998-11-20 2000-06-06 Kubota Corp 屋根瓦
DE10051182A1 (de) * 2000-10-16 2002-05-02 Nano X Gmbh Nanopartikel mit hydrophoben und oleophoben Eigenschaften, deren Verarbeitung und Verwendung
EP1249467A1 (fr) * 2001-04-12 2002-10-16 Creavis Gesellschaft für Technologie und Innovation mbH Surfaces auto-nettoyantes par leur structure hydrophobe et leur procédé de préparation
EP1432285A2 (fr) * 2003-12-30 2004-06-23 Phonak Ag Revêtement hydrophobe des composants individuels des prothèses auditives

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05283046A (ja) * 1992-03-31 1993-10-29 Toshiba Lighting & Technol Corp 管球および照明灯
JPH07217341A (ja) * 1994-02-02 1995-08-15 Nisshin Steel Co Ltd 非透水性網戸材
JPH0967456A (ja) * 1995-09-01 1997-03-11 Inoac Corp 防水構造及び防水性容器
DE10144259A1 (de) * 2001-09-08 2003-03-27 Bernd Spaeth Oberfläche mit verbesserten Eigenschaften
DE20110399U1 (de) * 2001-06-23 2002-03-14 Späth, Bernd, 74248 Ellhofen Gleitelemente, beispielsweise Schneegleitelemente, mit verbesserten Eigenschaften

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000091021A (ja) * 1998-09-10 2000-03-31 Harness Syst Tech Res Ltd 防水コネクタ
JP2000154620A (ja) * 1998-11-20 2000-06-06 Kubota Corp 屋根瓦
DE10051182A1 (de) * 2000-10-16 2002-05-02 Nano X Gmbh Nanopartikel mit hydrophoben und oleophoben Eigenschaften, deren Verarbeitung und Verwendung
EP1249467A1 (fr) * 2001-04-12 2002-10-16 Creavis Gesellschaft für Technologie und Innovation mbH Surfaces auto-nettoyantes par leur structure hydrophobe et leur procédé de préparation
EP1432285A2 (fr) * 2003-12-30 2004-06-23 Phonak Ag Revêtement hydrophobe des composants individuels des prothèses auditives

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN Bd. 018, Nr. 063 (E-1500), 2. Februar 1994 (1994-02-02) -& JP 05 283046 A (TOSHIBA LIGHTING & TECHNOL CORP), 29. Oktober 1993 (1993-10-29) *
PATENT ABSTRACTS OF JAPAN Bd. 1995, Nr. 11, 26. Dezember 1995 (1995-12-26) -& JP 07 217341 A (NISSHIN STEEL CO LTD), 15. August 1995 (1995-08-15) *
PATENT ABSTRACTS OF JAPAN Bd. 1997, Nr. 07, 31. Juli 1997 (1997-07-31) -& JP 09 067456 A (INOAC CORP), 11. März 1997 (1997-03-11) *
PATENT ABSTRACTS OF JAPAN Bd. 2000, Nr. 06, 22. September 2000 (2000-09-22) -& JP 2000 091021 A (HARNESS SYST TECH RES LTD; SUMITOMO WIRING SYST LTD; SUMITOMO ELECTRIC), 31. März 2000 (2000-03-31) *
PATENT ABSTRACTS OF JAPAN Bd. 2000, Nr. 09, 13. Oktober 2000 (2000-10-13) -& JP 2000 154620 A (KUBOTA CORP), 6. Juni 2000 (2000-06-06) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8830662B2 (en) 2011-03-01 2014-09-09 Apple Inc. Electronic devices with moisture resistant openings

Also Published As

Publication number Publication date
DE202004001229U1 (de) 2005-06-16
WO2005070544A3 (fr) 2005-09-01

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