WO2005070544A2 - Vorrichtung zum verringern von kapillarkräften - Google Patents
Vorrichtung zum verringern von kapillarkräften Download PDFInfo
- 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
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
Description
Claims
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 (de) | 2005-08-04 |
WO2005070544A3 WO2005070544A3 (de) | 2005-09-01 |
Family
ID=34684148
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2005/000124 WO2005070544A2 (de) | 2004-01-27 | 2005-01-27 | Vorrichtung zum verringern von kapillarkräften |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE202004001229U1 (de) |
WO (1) | WO2005070544A2 (de) |
Cited By (1)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014110603B4 (de) * | 2014-07-28 | 2019-09-12 | Martin Koepsell | Gehäuse mit abgedichtetem Innenraum |
Citations (5)
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 (de) * | 2001-04-12 | 2002-10-16 | Creavis Gesellschaft für Technologie und Innovation mbH | Selbstreinigende Oberflächen durch hydrophobe Strukturen und Verfahren zu deren Herstellung |
EP1432285A2 (de) * | 2003-12-30 | 2004-06-23 | Phonak Ag | Hydrophobe Beschichtung einzelner Komponenten von Hörgeräten |
Family Cites Families (5)
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 |
-
2004
- 2004-01-27 DE DE200420001229 patent/DE202004001229U1/de not_active Expired - Lifetime
-
2005
- 2005-01-27 WO PCT/DE2005/000124 patent/WO2005070544A2/de active Application Filing
Patent Citations (5)
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 (de) * | 2001-04-12 | 2002-10-16 | Creavis Gesellschaft für Technologie und Innovation mbH | Selbstreinigende Oberflächen durch hydrophobe Strukturen und Verfahren zu deren Herstellung |
EP1432285A2 (de) * | 2003-12-30 | 2004-06-23 | Phonak Ag | Hydrophobe Beschichtung einzelner Komponenten von Hörgeräten |
Non-Patent Citations (5)
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)
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 |
---|---|
WO2005070544A3 (de) | 2005-09-01 |
DE202004001229U1 (de) | 2005-06-16 |
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