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EP3579979B2 - Sprühkopf für ein fluidprodukt und verwendung solch eines kopfes - Google Patents

Sprühkopf für ein fluidprodukt und verwendung solch eines kopfes Download PDF

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Publication number
EP3579979B2
EP3579979B2 EP18709666.4A EP18709666A EP3579979B2 EP 3579979 B2 EP3579979 B2 EP 3579979B2 EP 18709666 A EP18709666 A EP 18709666A EP 3579979 B2 EP3579979 B2 EP 3579979B2
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EP
European Patent Office
Prior art keywords
spray head
approximately
equal
head according
swirl
Prior art date
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Active
Application number
EP18709666.4A
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English (en)
French (fr)
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EP3579979B1 (de
EP3579979A1 (de
Inventor
stéphane Beranger
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.)
Aptar France SAS
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Aptar France SAS
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
    • B05B1/3405—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl
    • B05B1/341—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet
    • B05B1/3421—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber
    • B05B1/3431—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber the channels being formed at the interface of cooperating elements, e.g. by means of grooves
    • B05B1/3436—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber the channels being formed at the interface of cooperating elements, e.g. by means of grooves the interface being a plane perpendicular to the outlet axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers for dispensing liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant
    • B65D83/16—Actuating means
    • B65D83/20—Actuator caps

Definitions

  • the present invention relates to a fluid product spray head which comprises a body forming a housing in which a core extends.
  • the head also comprises a nozzle engaged in the housing around the core so as to form between them several swirl channels as well as a swirl chamber into which the swirl channels open.
  • the nozzle also comprises a dispensing orifice which forms the outlet of the swirl chamber.
  • Such a spray head design is entirely conventional in the fields of cosmetics, pharmacy or perfumery.
  • the spray head is generally mounted on the free end of the valve stem of a pump or a valve. In general, the spray head forms a push button on which the user can press axially using a finger, typically the index finger.
  • Shear thinning refers to the fact that a fluid product "becomes more fluid" when the flow rate increases. More precisely, it refers to the fact that the dynamic viscosity decreases when the shear rate increases. It is also referred to as shear thinning or pseudo-plasticity. Shear thinning should not be confused with thixotropy, which refers to the decrease in viscosity under the effect of shear stress.
  • the behavior of a fluid product is shear thinning or "pseudoplastic" (old name sometimes encountered) in the shear thinning domain, located after the 1st Newtonian plateau.
  • the viscosity of the fluid decreases (thinning) with the increase in the speed gradient.
  • the structure of the material is oriented/deformed by shear (example: alignment of the chains of a polymer following the direction of the stress). At high shear rates (corresponding to the second Newtonian plateau), there is destructuring of the material. A structure that does not flow requires a greater effort to be destructurized.
  • Most samples containing large objects compared to the atomic scale are shear thinning. The majority (about 90%) of substances are shear thinning: polymers, lightly filled emulsions, suspensions, shampoo, etc.
  • the present invention aims to optimize the characteristics of the swirl channels, the swirl chamber and/or the dispensing orifice to obtain a homogeneous and balanced spray, both in space and in terms of droplet sizes.
  • the droplets at a distance of 20 cm must be sufficiently distributed so as not to form drips.
  • the present invention provides a fluid product spray head according to claim 1.
  • the dispensing orifice is cylindrical and has an axial length L3 which is less than approximately 30% of D3. It is thus possible for the dispensing orifice to be formed by an annular edge, so that L3 is zero.
  • the outlet section S3 of the dispensing orifice is considerably larger. This is because xanthan gel has elastic properties: when it is constrained, it absorbs energy to "expand” when released. This is the effect that occurs when passing through the dispensing orifice of conventional nozzles ( ⁇ 0.3 mm in diameter). During this "expansion", the droplets being formed stick together to form a jet.
  • 0.2 mm 2 ⁇ S3 ⁇ 0.38 mm 2 and preferably S3 is equal to approximately 0.33 mm 2 , so that 0.5 mm ⁇ D3 ⁇ 0.7 mm, and preferably D3 is equal to approximately 0.65 mm.
  • 0.5 mm 2 ⁇ S2 ⁇ 1.13 mm 2 and preferably S2 is equal to approximately 0.785 mm 2 , so that 0.8 mm ⁇ D2 ⁇ 1.2 mm, and preferably D2 is equal to approximately 1 mm.
  • the swirl chamber comprises a truncated portion whose maximum diameter is equal to D2 and which has an axial length L23 which is between 30% and 60% of D2, and preferably approximately half of D2.
  • the swirl chamber also comprises a cylindrical portion at which the swirl channels open, this cylindrical portion having an axial length L22 which is equal to approximately 40% of D2.
  • the swirl chamber defines, from upstream to downstream, first a cylindrical portion of diameter D2, then a truncated portion at which the diameter changes from D2 to D3.
  • the swirl chamber consists solely of a cylindrical portion that connects to the dispensing orifice by a shoulder.
  • S1 is equal to about 0.07 mm 2 and S0 is equal to about 0.21 mm 2 . This means that the channels have a more or less triangular overall configuration with a large inlet and a small outlet.
  • the channel inlet forms a rounded wall.
  • This rounded wall is of particular advantage with shear-thinning fluid products that are sensitive to high pressure losses and disturbances. With this rounded wall, the fluid product can enter the swirl channels substantially without disturbances and without pressure losses due to the change in orientation. The fluid product in the swirl channels is then accelerated, since the cross-section S1 is smaller than the cross-section S0.
  • the core side wall is cylindrical and the core front wall is planar.
  • the core has no orientation, and the nozzle can be engaged around the core without paying attention to its orientation. Easier assembly is thus achieved.
  • the present invention thus defines a spray head having a very particular configuration, which finds a preferred use with rheofluidifying fluid products, which contain for example xanthan gum with a content of the order of 1% or less.
  • the spirit of the invention lies in the fact that the fluid product which circulates through the nozzle undergoes the least possible variation in pressure losses, in order to avoid too great an absorption of energy which then induces too great an expansion which disrupts the formation of the droplets which then tend to stick together to form a jet.
  • This is particularly the case for rheofluidifying fluid products, but also for other types of fluid product.
  • the cross-section (or diameter) ratio of the distribution orifice and the swirl chamber and/or the length of the swirl channels relative to the diameter of the swirl chamber constitute characteristics which can be considered as directly influential for the formation of a spray of optimum quality.
  • the other characteristics of the nozzle allow for further improvement of the spray quality.
  • the dispensing head comprises a head body 1 which forms a connection sleeve 11 in which is engaged the free end of a valve stem P1 of a dispensing unit P, which may be a pump or a valve.
  • a dispensing unit P which may be a pump or a valve.
  • it is a standard pump which delivers fluid product through its valve stem P1 with a pressure of the order of 3 to 6 bars.
  • the body 1 forms an axial space 12 which extends substantially in the extension of the valve stem P1.
  • the body 1 then forms a supply duct 13 which extends horizontally, that is to say perpendicular to the connection sleeve 11.
  • This supply duct 13 opens into an annular housing 14 in which extends a core 16 which defines a core side wall 16a and a core front wall 16b.
  • Housing 14 opens laterally into body 1. This is a completely classic design for a head body in the fields of cosmetics, perfumery or even pharmacy.
  • the head also comprises a nozzle 2 which is forcibly engaged in the housing 14 around the core 16.
  • the nozzle 2 has a general cup shape with a distribution wall 21 into which a spray orifice O opens.
  • the distribution wall 21 comes into abutting contact with the core front wall 16b.
  • the nozzle 2 also comprises a fixing side wall 22 which is engaged around the core 16.
  • the fixing side wall 22 can also form one or more harpoon notches 23 to ensure the fixing of the nozzle in the housing 14.
  • the distribution wall 21 forms upstream of the distribution orifice O a swirl chamber C which is supplied by several swirl channels T, themselves supplied by several connecting passages P, all formed between the core 16 and the nozzle 2.
  • the connecting passages P are supplied by the annular space 15. This is a completely conventional design for a nozzle in the fields of perfumery, cosmetics or even pharmacy.
  • the spray head also comprises a covering band 3 which is in the form of a hood in which the core 1 is engaged.
  • the covering band 3 comprises a side skirt 31 which is pierced with a window 32 facing the distribution wall 21 of the nozzle 2.
  • the upper wall 30 of the covering band 3 forms a support surface for a finger of a user. Again, this is a completely conventional design for a covering band in the field of perfumery, cosmetics or even pharmacy.
  • the distribution orifice O has a chamber outlet diameter D3 which defines a chamber outlet section S3, as well as an axial depth or length L3 measured along the X axis of the figure 3 .
  • the swirl chamber C is centered on the distribution orifice O along the longitudinal axis of revolution X.
  • the swirl chamber C has a maximum chamber inlet diameter D2 defining a maximum chamber inlet section S2.
  • the chamber outlet is formed by the distribution orifice O, such that the minimum chamber outlet diameter is equal to D3.
  • the swirl chamber C comprises a cylindrical portion C2 whose diameter is D2 and a frustoconical portion C3 arranged between the cylindrical portion C2 and the distribution orifice O, such that the maximum diameter of the cylindrical portion C3 is equal to D2 and its minimum diameter is equal to D3.
  • the nozzle 2 comprises three swirl channels T which have a generally triangular configuration.
  • the three swirl channels T are arranged equiangularly around the swirl chamber C.
  • Each swirl channel T comprises a channel inlet T0 defining a section channel input S0 and a channel output T1 defining a channel output section S1.
  • Each swirl channel T also defines a length L1, as seen in the figure 4 .
  • Each swirl channel T comprises two walls T2 and T3 which extend substantially tangentially to the swirl chamber C. As a result, the two walls T2 and T3 are not parallel, but on the contrary convergent towards the swirl chamber, where they form between them the channel outlet T1 of section S1. Consequently, S0 is greater than S1.
  • the two other walls (not referenced) of the swirl channel T are identical, parallel and respectively formed by the front wall 16b of the core 16 and the distribution wall 21.
  • the fixing side wall 22 internally forms three reinforcements 24 which are arranged between the three channel inlets T0. These three reinforcements 24 have the function of coming into contact with the side wall 16a of the core 16. Between the reinforcements 24, the nozzle 2 forms with the core 16 the three connecting passages P. These connecting passages P are in fluid communication with the channel inlets T0.
  • the channel inlets T0 comprise a rounded wall Ta, such that the fluid product which travels in the connecting passages P is progressively deflected along the rounded walls Ta in the respective swirl channels T.
  • These rounded walls Ta thus form gentle ramps which respectively connect each connecting passage P to a swirl channel T. They make it possible to pass without break from an axial orientation (that of the connecting passages P) to a radial orientation (that of the swirl channels).
  • Sections S0, S1, S2 and S3 are more clearly visible on the Figures 5, 6a and 6b , which represent fluid veins, that is, the volume occupied by the fluid product between the core 16 and the nozzle 2.
  • the fluid vein corresponds to the volumes of the swirl channels, the swirl chamber and the distribution orifice O.
  • the sections S2 and S3 extend perpendicular to the X axis and are arranged parallel to each axial end of the swirl chamber C.
  • the outlet section S1 of the channels extends parallel to the X axis substantially tangentially to the swirl chamber C.
  • the inlet section S0 extends parallel to the sections S2 and S3, but eccentrically relative to the swirl chamber C. It can even be said that the section S0 extends in the same plane as the section S3, since they are defined at the front wall 16b of the core 16. It can also be said that the sections S0 and S1 extend in respective planes arranged perpendicular to each other.
  • section should be understood as the maximum section
  • diameter should be understood as the maximum diameter
  • length should be understood as the maximum length.
  • approximately means ⁇ 5% when it is a percentage and ⁇ 10% when it is a magnitude.
  • R1 and R2 are often predominant, without neglecting the other relationships, which also have an effect on spray quality.
  • R1 is more influential than R2, and in other cases, it is the opposite, and in some applications R1 and R2 are equal.
  • Relationship R3 turned out to be the third most influential relationship in most cases.
  • the conjunction of the relationships R1 + R3 or R2 + R3 can therefore also be considered particularly influential on the quality of the spray.
  • R4 in some applications, so that the conjunction of the relationships R1 + R4 or R2 + R4 can therefore also be considered as particularly influential on the quality of the spray.
  • Relation R7 implies that L3 can be zero, so that the distribution orifice O can be formed by an annular edge.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Nozzles (AREA)

Claims (13)

  1. Sprühkopf für ein Flüssigprodukt, umfassend:
    - einen Körper (1), der eine Verbindungshülse (11) bildet, die dazu geeignet ist, einen Ventilschaft eines Abgabeelements, beispielsweise einer Pumpe oder eines Ventils, aufzunehmen, wobei die Verbindungshülse (11) über eine Zuführleitung (13) mit einem Gehäuse (14) verbunden ist, in dem sich ein Kern (16) erstreckt, der eine Kernseitenwand (16a) und eine Kernstirnwand (16b) ausbildet,
    - eine Düse (2; 2'), die um den Kern (16) herum in das Gehäuse (14) eingesetzt ist, wobei die Düse (2; 2') eine Zerstäubungsöffnung (O) ausbildet, durch die das Flüssigprodukt in Form eines Sprays aus dem Sprühkopf austritt, wobei die Zerstäubungsöffnung (O) einen Kammeraustrittsdurchmesser D3 und einen Kammeraustrittsabschnitt S3 aufweist,
    - wobei zwischen dem Kern (16) und der Düse (2; 2') in Fließrichtung folgendes ausgebildet ist:
    • eine Vielzahl von Verbindungskanälen (P) in Flüssigkeitsverbindung mit der Versorgungsleitung (13),
    • eine Vielzahl von Wirbelkanälen (T), die jeweils mit den Verbindungskanälen (P) verbunden sind, wobei jeder Wirbelkanal (T) eine Kanallänge L1, einen Kanaleinlass (T0) mit einem Kanaleinlassabschnitt S0 und einen Kanalauslass (T1) mit einem Kanalauslassabschnitt S1 aufweist,
    • eine Wirbelkammer (C), in die die Wirbelkanäle (T) münden, wobei die Wirbelkammer (C) eine Längsdrehachse X definiert und eine axiale Länge L2, einen Kammereinlassdurchmesser D2 und einen Kammereinlassabschnitt S2 in dem Bereich aufweist, in dem die Wirbelkanäle (T) in sie münden, wobei die Zerstäubungsöffnung (O) einen Auslass für die Wirbelkammer (C) bildet,
    bei dem L1 ≥ 110% von D2 ist, und vorzugsweise L1 ca. 150% von D2 entspricht,
    dadurch gekennzeichnet, dass die Abgabeöffnung (O) zylindrisch ist und ihre axiale Länge L3 unter ca. 30% von D3 liegt.
  2. Sprühkopf nach Anspruch 1, bei dem 30% von S2 ≤ S3 ≤ 55% von S2 ist, und vorzugsweise S3 ca. 42% von S2 entspricht, sodass 54% von D2 ≤ D3 ≤ 74% von D2 ist, und vorzugsweise D3 ca. 65% von D2 entspricht.
  3. Sprühkopf nach Anspruch 1 oder 2, bei dem 0,5 mm2 ≤ S2 ≤ 1,13 mm2, und vorzugsweise S2 ca. 0,785 mm2 beträgt, sodass 0,8 mm ≤ D2 ≤ 1,2 mm ist, und vorzugsweise D2 ca. 1 mm beträgt.
  4. Sprühkopf nach einem der voranstehenden Ansprüche, bei dem 0,2 mm2 ≤ S3 ≤ 0,38 mm2 ist, und vorzugsweise S3 ca. 0,33 mm2 beträgt, sodass 0,5 mm ≤ D3 ≤ 0,7 mm ist, und vorzugsweise D3 ca. 0,65 mm beträgt.
  5. Sprühkopf nach einem der voranstehenden Ansprüche, bei dem L2 ≥ 80% von D2 ist, und vorzugsweise L2 ca. 0,88 mm beträgt.
  6. Sprühkopf nach einem der voranstehenden Ansprüche, bei dem die Wirbelkammer (C) einen kegelstumpfförmigen Abschnitt (C3) aufweist, dessen maximaler Durchmesser gleich D2 ist und dessen axiale Länge L23 zwischen 30% und 60% von D2 und vorzugsweise ca. die Hälfte von D2 beträgt.
  7. Sprühkopf nach Anspruch 7, bei dem die Wirbelkammer (C) auch einen zylindrischen Teil (C2) aufweist, an dem die Wirbelkanäle (T) münden, wobei dieser zylindrische Teil (C2) eine axiale Länge L22 hat, die ca. 40% von D2 beträgt.
  8. Sprühkopf nach einem der voranstehenden Ansprüche, bei dem S1 ≤ 50% von 80, und vorzugsweise S1 = 33% von S0 ist.
  9. Sprühkopf nach einem der voranstehenden Ansprüche, bei dem S1 ca. 0,07 mm2 beträgt und S0 ca. 0,21 mm2 beträgt.
  10. Sprühkopf nach einem der voranstehenden Ansprüche, bei dem S1 ≤ 10% von S2 ist.
  11. Sprühkopf nach einem der voranstehenden Ansprüche, bei dem der Kanaleinlass (T0) eine abgerundete Wand (Ta) ausbildet, sodass das in den Verbindungskanälen (P) strömende Flüssigprodukt an den abgerundeten Wände (Ta) entlang allmählich in die jeweiligen Wirbelkanäle (T) abgelenkt wird.
  12. Sprühkopf nach einem der voranstehenden Ansprüche, bei dem die Kernseitenwand (16a) zylindrisch und die Kernstirnwand (16b) eben ist.
  13. Verwendung eines Sprühkopfes nach einem der voranstehenden Ansprüche zum Zerstäuben eines scherverdünnenden Flüssigprodukts, das beispielsweise Xanthangummi enthält.
EP18709666.4A 2017-02-09 2018-02-13 Sprühkopf für ein fluidprodukt und verwendung solch eines kopfes Active EP3579979B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1751093A FR3062582B1 (fr) 2017-02-09 2017-02-09 Tete de pulverisation de produit fluide et utilisation d'une telle tete.
PCT/FR2018/050344 WO2018146433A1 (fr) 2017-02-09 2018-02-13 Tête de pulvérisation de produit fluide et utilisation d'une telle tête

Publications (3)

Publication Number Publication Date
EP3579979A1 EP3579979A1 (de) 2019-12-18
EP3579979B1 EP3579979B1 (de) 2020-12-16
EP3579979B2 true EP3579979B2 (de) 2024-11-20

Family

ID=58455316

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Application Number Title Priority Date Filing Date
EP18709666.4A Active EP3579979B2 (de) 2017-02-09 2018-02-13 Sprühkopf für ein fluidprodukt und verwendung solch eines kopfes

Country Status (5)

Country Link
EP (1) EP3579979B2 (de)
KR (1) KR20200110150A (de)
CN (1) CN110382119B (de)
FR (1) FR3062582B1 (de)
WO (1) WO2018146433A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20240082857A1 (en) * 2021-01-18 2024-03-14 Bonsens Ab A swirl nozzle and methods of fabricating the same
US20240166426A1 (en) * 2022-11-18 2024-05-23 The Procter & Gamble Company Aerosol dispenser and nozzle with reduced drip
WO2024108077A1 (en) * 2022-11-18 2024-05-23 The Procter & Gamble Company Aerosol dispenser and nozzle

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2708908B1 (fr) * 1993-08-11 1995-10-13 Oreal Bouton-poussoir à buse de pulvérisation destiné à être monté sur un distributeur et distributeur équipé d'un tel bouton-poussoir.
US5711488A (en) * 1995-10-13 1998-01-27 The Procter & Gamble Company High pressure swirl atomizer
US9242256B2 (en) * 2007-07-17 2016-01-26 S.C. Johnson & Son, Inc. Aerosol dispenser assembly having VOC-free propellant and dispensing mechanism therefor
AU2015301365B2 (en) * 2014-08-06 2018-03-15 S.C. Johnson & Son, Inc. Spray inserts

Also Published As

Publication number Publication date
WO2018146433A1 (fr) 2018-08-16
FR3062582B1 (fr) 2019-03-29
EP3579979B1 (de) 2020-12-16
EP3579979A1 (de) 2019-12-18
CN110382119A (zh) 2019-10-25
CN110382119B (zh) 2021-10-26
KR20200110150A (ko) 2020-09-23
FR3062582A1 (fr) 2018-08-10

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