Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
  • D06F75/00—Hand irons
  • D06F75/08—Hand irons internally heated by electricity
  • D06F75/10—Hand irons internally heated by electricity with means for supplying steam to the article being ironed
  • D06F75/14—Hand irons internally heated by electricity with means for supplying steam to the article being ironed the steam being produced from water in a reservoir carried by the iron
  • D06F75/18—Hand irons internally heated by electricity with means for supplying steam to the article being ironed the steam being produced from water in a reservoir carried by the iron the water being fed slowly, e.g. drop by drop, from the reservoir to a steam generator

Definitions

• the present invention relates to steam irons.
• These irons conventionally comprise a sole composed of a body generally made of cast aluminum, and of a cap covering the lower part of this body and coming into contact with the clothes to be ironed.
• the body of the sole generally made of aluminum, includes a heating element, an almost instantaneous vaporization chamber for water and channels for distributing the steam produced towards the steam orifices directed onto the linen through the cover.
• the body of the soleplate must ensure both the vaporization of water and the temperature maintenance of the cap.
• the temperature of the wet heating surface of an evaporator varies only with the vaporization power therefore the vapor flow rate.
• This surface temperature varies quite slightly around 110-130 ° C.
• the temperature of the heating element of the soleplate can be adjusted according to the fabrics in a range of the order of 80 ° C. to 200 ° C.
• the vaporization chamber is coated on its wet faces with a layer of a hydrophilic coating with low thermal conductivity which allows the wet surface to remain at a temperature compatible with good vaporization without liquefaction, whatever the temperature of the heating body. , the extent of the wetted surface adjusting with the water flow and the heat flow. Patent FR 2696197 is known in which this spreading of water and wetting are favored.
• the coating of the chamber is a silicate on which is placed a fiber mast or a fabric retained by a grid which can itself be coated. The fibers have the advantage of increasing the specific surface area of the wet region while completing thermal insulation, of storing and distributing water over the surface of the chamber before it vaporizes.
• patent FR 2707732 is known, in which a vaporization chamber is described, the bottom of which consists of hydrophilic fibers partially embedded in the material constituting the heating body of the sole.
• the coating mainly composed of a silicate is sensitive to contamination and has a too limited lifespan.
• the wettability of the fibers is generally obtained by removing the size which activates their surface but makes them sensitive to various contaminations, so that problems of refusal of vaporization can occasionally occur, characterized by an absence of wettability of the coating, resulting in noise and spitting water through the spray holes in the sole.
• Patent EP 0425043 uses these properties to improve the deposition in the vaporization chambers of steam irons starting from a colloidal silica solution.
• this patent does not suggest the use of sodium silicate as a base product for the deposition, the silicate having the advantage of cleaning and removing the surface of the aluminum on which it is applied by saponifying the greases which may be present, which simplifies the application process and allows good anchoring of the following layers.
• Patent FR2522318 cites another property of phosphates, in particular sodium tripolyphosphate, which, dissolved in the water to be vaporized, prevents the iron from scaling up.
• the patent FR2757364 cites the use of sodium hexametaphosphate in the water to be vaporized to prevent the tartar from depositing incrustingly in the iron. But these patents say nothing about improving the wettability of the vaporization chamber, and the products mentioned remain soluble.
• phosphorus products of organic type also have anti-lime properties and also properties for stabilizing emulsions at very low concentrations.
• the invention described below relates to a coating of a steam chamber for an iron improved to increase its life, having a lower sensitivity to contamination as well as scaling, and an excellent performance of vaporization.
• the object of the invention is achieved by coating an iron vaporization chamber, this coating initially comprising a layer composed essentially of sodium silicate, and at least locally a mast of fibers or a hydrophilic fabric, remarkable in that that the initial coating has received a surface treatment with a product containing phosphorus and having an acid group.
• the phosphorus product reacts with the silicate by neutralizing the sodium hydroxide and combines with the remaining silica to form bodies which are difficult to wash.
• the reaction although not fully analyzed, occurs on the surface of the silicate deposit and preserves the bonding of the layer on the support. The surface becomes more neutral chemically reaching a hydrogen potential (PH) of the order of 7 on the surface, which protects it from accidental contamination.
• PH hydrogen potential
• the presence of phosphorus makes it possible to obtain exceptional wettability when hot, including on fibers which may not be silicate, and the presence of these fibers allows spreading of the water to be vaporized over a large area, thereby increasing performance. .
• the fibers also make it possible to retain a greater quantity of product resulting from the treatment.
• the treatment product is a phosphonate, for example amino-trimethylene phosphonic acid in solution in water.
• the treatment product comprises an addition product such as sodium molybdate, molybdenum diacetate, calcium or magnesium chloride promoting the bonding of the deposited layers.
• the treatment product contains colloidal silica.
• the silicate layer is reinforced and the fibers better coated.
• the coating is obtained by evaporation of a solution of the treatment product in the chamber previously coated with sodium silicate and at least locally with fibers.
• This solution allows a good distribution of the treatment product and a good reaction with the initial coating.
• Figure 1 is a longitudinal sectional view through a vertical plane of a steam iron soleplate comprising a coated vaporization chamber, the soleplate being horizontal. Only the initial coating of the chamber is shown.
• a steam iron comprises a sole consisting of a cover 1 constituting the ironing surface, a heating body 2 made of aluminum and in thermal connection with this cover.
• the heating body comprises a heating element 6 and a vaporization chamber 3 of water from a drip positioned on an opening 4 of the closure plate 5 of the steam chamber.
• the coating of the vaporization chamber 3 is composed of an initial coating to which, according to the invention, a treatment product is applied which increases the vaporization performance of the chamber.
• the initial coating of the vaporization chamber 3 comprises a layer 10 of sodium silicate strongly adhering to the wall of the heating body 2 made of aluminum. On this layer is deposited a fabric 1 1 of glass fibers, the size of which has been removed after manufacture. A grid 12 held by rivets 13 from the heating body 2 fixes the fiber fabric 11. The fabric 11 covers minus the part of the chamber 2 subjected to the drop of the water drops, in line with the opening 4 of the closing plate 5.
• the fabric 11 is fixed to the heating body 2 by the grid 12.
• the silicate layer 10 is reinforced by the evaporation of a solution colloidal silica in the vaporization chamber 3.
• the treatment product is a solution in water of a phosphonic acid such as amino-tri-methylene-phosphonic acid.
• a phosphonic acid such as amino-tri-methylene-phosphonic acid.
• the treatment product comprises a connecting element such as sodium molybdate, and optionally a reinforcing agent such as colloidal silica.
• a silicate solution is evaporated in the vaporization chamber 3, then after cooling, the glass cloth 11 is fixed with the grid 12 to obtain the initial coating, then 15 ml of a solution are evaporated. with 3% silica and 0.3% phosphonate in the vaporization chamber and the final coating is obtained, the indicative values cited corresponding to 25 square centimeters of chamber surface.
• the initial coating of known type has good adhesion to the wall of the heating body 2. This initial coating is concerned on the surface by the treatment, but the deep connection with the support 2 is not affected, which gives the coating according to the invention good adhesion.
• the neutralization of the basic surface of the initial coating reduces the sensitivity of the coating according to the invention to various contaminations and the presence of phosphorus gives it very useful hot wettability characteristics.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Irons (AREA)
• Chemical Or Physical Treatment Of Fibers (AREA)
• Combustion Methods Of Internal-Combustion Engines (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Manufacture Of Iron (AREA)
• Electroplating Methods And Accessories (AREA)

Applications Claiming Priority (3)

Publications (2)

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Family Applications (1)

Country Status (9)

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Family Cites Families (10)

• 2000
  • 2000-03-15 FR FR0003333A patent/FR2806427B1/fr not_active Expired - Fee Related
• 2001
  • 2001-03-06 AT AT01913932T patent/ATE325917T1/de not_active IP Right Cessation
  • 2001-03-06 DE DE60119501T patent/DE60119501T2/de not_active Expired - Lifetime
  • 2001-03-06 EP EP01913932A patent/EP1264028B1/de not_active Expired - Lifetime
  • 2001-03-06 WO PCT/FR2001/000661 patent/WO2001068971A1/fr active IP Right Grant
  • 2001-03-06 AU AU2001239339A patent/AU2001239339A1/en not_active Abandoned
  • 2001-03-06 ES ES01913932T patent/ES2261385T3/es not_active Expired - Lifetime
  • 2001-03-06 US US10/221,328 patent/US6684539B2/en not_active Expired - Fee Related
  • 2001-03-06 MX MXPA02009041A patent/MXPA02009041A/es active IP Right Grant

Non-Patent Citations (1)

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