EP3221236A1

EP3221236A1 - Discharge device and associated dispenser for fluid product compositions

Info

Publication number: EP3221236A1
Application number: EP15797109.4A
Authority: EP
Inventors: Raphaela Müller; Julia Köhler; Angelo DORI; Rik Nuijen; Jolijn Schoofs; Barbara Grossmann
Original assignee: Henkel AG and Co KGaA
Current assignee: Henkel AG and Co KGaA
Priority date: 2014-11-19
Filing date: 2015-11-19
Publication date: 2017-09-27
Anticipated expiration: 2035-11-19
Also published as: WO2016079235A1; EP3221236B1; DE102014017032A1

Abstract

The invention relates to a discharge device and an associated dispenser (1) for fluid product compositions, wherein the individual components of the product composition are kept separate from one another within the dispenser (1) until the product is actually discharged. In order to permit the simplified manipulation of the dispenser (1), same accordingly comprises a discharge device (10) for discharging the multi-component product composition, said discharge device having: an actuation element (11) for activating the product discharge; at least two inlet openings (32) for the product components; at least one outlet opening (33) for discharging the product composition, said inlet openings (32) and outlet opening (33) being fluidically connected to one another; and a mixing device (30, 31) arranged between the inlet openings (32) and the outlet opening (33), said mixing device having a channel-type mixing section (35, 35') through which the product components can flow, and which has flow fittings (36) for the flow-induced mixing of the product components. In addition, the length (L) of the mixing section (35) is greater than the largest outer measurement (I) of the discharge device (10).

Description

Dispensing device and associated dispenser for flowable product compositions

The present invention relates to a dispenser and associated dispenser for flowable product compositions wherein the individual components of the product composition within the dispenser are maintained within the dispenser separately from each other until the actual product dispensing. Such dispensers are basically known from their basic structure, for example in the context of reactive, multicomponent adhesive or cosmetic products. Within the applications in the cosmetic sector, generic donors are mainly known from multicomponent hair dyeing products.

For example, US Pat. No. 6,834,778 B2 describes such a dispenser for a two-component hair dyeing composition. The dispenser initially has two separate pressure vessels in which the two components of the hair dye composition are kept separately. In this case, each hair dye component is in each case together with a suitable propellant in the pressure vessel, so that it can be discharged in the actuation case in a simple way by appropriate valve circuit. Both pressure vessels are coupled within the dispenser to an associated dispenser with integrated mixer. In the dispenser, the hair dyeing components are brought together only in the actuation case of the dispenser and mixed within the mixer to the ready hair dyeing composition. For this purpose, the dispensing device comprises a static mixer, which is arranged in a common flow channel for both Haarfärbekomponenten. Specifically, the static mixer described therein has spiral flow internals for flow-induced mixing of the two hair dyeing components as soon as both hair dyeing components are passed through the static mixer. For better handling and, above all, for easier cleaning of the application device, it is designed to be removable, so that the individual components of the application device can be cleaned separately. It has proved to be disadvantageous with the mentioned application device that the static mixer has only a very short mixing section. As a result, just for the hair dyeing application, the mixing of the two hair dyeing components is insufficient. In addition, the dispenser allows a composition delivery only in the axial longitudinal direction of the pressure vessel. However, such a compositional delivery proves to be not always easy to use in practice.

From DE 3729491 A1 a dispenser for viscous cosmetic products is also known, which consist of at least two components, which are mixed together only during the product delivery. The individual product components are stored separately until delivery in separate aerosol pressure vessels. The pressure vessels are in turn coupled to a common dispensing head, which is adjacent to a dispensing opening for the product mixture also has a channel-like mixing chamber. In the case of actuation, the product components emerging from the pressure vessels are thus passed for mixing through the mixing chamber with a relatively short mixing section. The product mixture is then dispensed through a dispensing opening for actual product application. A disadvantage of this dispenser proves the inadequate quality of the mixing of the individual product components, which can be attributed mainly to the design of the mixing chamber. In this case, insufficient mixing of the product components, at least in the case of certain cosmetic products, for example hair dye products, can directly lead to losses in product effectiveness.

Based on this, the object of the invention is to provide a device for dispensing a flowable product composition consisting of several product components, which allows a user-friendly application despite simple overall design.

Basically, flowable product compositions or components in the context of the invention are understood to mean all those product formulations whose rheological properties permit flow-conditioned product mixing and dispensing by means of a dispensing device according to the invention. These include, among others, liquid, gel-like, creamy, pasty, foamy and comparatively viscous product formulations.

The object is achieved by a dispensing device for dispensing a flowable product composition from a plurality of product components held separately from each other according to claim 1. Thereafter, the dispensing device first comprises an actuating element for activating the product dispensing, which can be embodied, for example, as an actuating button, switch or lever , In addition, the dispensing device has at least two inlet openings for the product components and at least one outlet opening for dispensing the product composition, wherein inlet openings and outlet opening are fluidly connected to one another. Arranged on the flow path between the inlet openings and the outlet opening is a mixing device which has a channel-like mixing section with flow internals, through which the product components can flow, for flow-induced mixing of the product components. According to the invention, it is provided that the length of the mixing section is greater than the largest external dimension of the dispensing device. Particularly preferably, the length of the mixing section is greater than the largest external dimension of the mixing device. In this case, the length of the mixing section is determined as the length of the channel-like route section between the inlet openings and the outlet opening of the mixing device. In this way, it is ensured that, on the one hand, the mixing section has a sufficient length in order to achieve the desired mixing quality and, on the other hand, the dispensing device is advantageously made compact.

According to an advantageous embodiment of the dispensing device, the ratio of the length of the mixing section to the mean diameter of the channel-like mixing section is between 5: 1 and 30: 1, preferably between 10: 1 and 25: 1. The mean diameter of the channel-like is determined Mixing section as the average diameter or average width of the mixing section over its entire length. In this respect, the mixing section according to the invention has a substantially elongated design, which ensures a corresponding mixing quality for the product composition to be dispensed.

In general, the mixing device is preferably designed as a static mixing device, which is also known in practice as "static mixer." A mixing device similar in its general basic features is also described in the documents already cited Such fluid inlets or baffles are usually designed as flow guide elements or orifices which extend into the channel-like mixing section, in the present case in which the fluid consists of at least one or more fluid flows through the mixing section If there are two product components, then the two product components are mixed when flowing through the mixing section to form a product composition.

A particularly effective embodiment of the dispensing device results from the fact that the mixing section has a minimum length of 6cm. Preferably, the length of the mixing section is in a value range of 6-15 cm. Such a mixing line length ensures the largely homogeneous mixing of the individual components within the common product composition.

According to a first embodiment of the dispensing device, the mixing section has at least one curved section which comprises at least a curve of at least 45 °. Ie. the mixing section by no means has a generally straightforward progression known for the previously known static mixer. Rather, can be realized on a total of limited space by the inventive curved course of the mixing section a sufficiently long mixing section. In addition, the curved course of the mixing section promotes the mixing quality.

A further developed variant of the dispensing device provides that the mixing section has at least one S, meandering or spiraling section. These mentioned forms of design contribute particularly to the two desired main effects for the dispenser, namely good mixing quality and a compact design.

Another useful embodiment of the dispensing device is achieved in that the mixing device has a two-part structure with a lower and a top. As a consequence of this structural design, the mixing device can be used particularly in view of the internal flow installations or baffles using conventional production methods. produce scientifically. For example, in the case of the advantageous use of an injection molding method for producing the two-part mixing device, a simple releasability of the lower and upper part of the mixing device is ensured.

In addition, an associated dispenser for storing and dispensing a flowable product composition from a plurality of product components held separately from each other to dispense is also protected using a dispenser as described above. Such a dispenser according to the invention comprises at least one container which has at least two chambers for separately holding the product components. In this case, the already described dispensing device is coupled to the container (s) such that the inlet openings are fluid-connected to the chambers at least during the product delivery. Such a dispenser can be made available to the end user directly as a usable total product. It effectively ensures a separate provision of various product components and during delivery for a high-quality mixing of the individual components to a substantially homogeneous product composition.

According to a particularly preferred dispenser variant, the product components initially held separately have substantially the same rheological product properties, in particular substantially the same viscosity. Comparable rheological properties of the individual product components favor according to the invention the desired flow conditions in the mixing section and in this connection ensure good mixing of the product components. Specifically, the individual product components have a viscosity in the range of 1 .000 to 150,000 mPas, preferably 5,000 to 100,000 mPas, more preferably 15,000 to 70,000 mPas, determined using a Brookfield RDV II + measuring system with a spindle 4 at 4 revolutions per minute and a temperature of 20 ° C.

Basically, the dispenser in the context of the present invention is understood to mean a container comprising at least two chambers, which can be made of plastic, metal and / or plastic-metal composites, for example. The donor can u. a. in the form of a can, a bottle, a container, a pressure vessel or a tube. For the product according to the invention, all embodiments of the dispenser are suitable which ensure that the product components present in the two chambers of the dispenser are reliably kept isolated from each other until removal.

Preferably, the individual product components are mixed in the course of the actual product application after dispensing operation to a total product composition in order to exhaust the full effectiveness of the product composition in this way and to facilitate the product application in general. For this purpose, the dispenser expediently comprises, in addition to the chambers, the dispensing device already described above, within which the product components are conveyed from the chambers to the common outlet opening. In this case, said mixing device is formed in the dispensing device, which upstream the outlet port provides the desired mixing of the product components before the mixed overall product composition is dispensed via the outlet port. In this case, the mixing device is specifically tailored to the rheological properties of the product components, especially with regard to the length of the mixing section and the specific design of the flow baffles or baffles.

The specific design of the individual chambers for the product components can be very variable in the context of the invention. Thus, the chambers within the dispenser can be arranged both side by side and one above the other. Furthermore, a first chamber can also be located within a second chamber, with one chamber partially or completely enveloping the other. Of course, this flexibility in the arrangement of the individual chambers with one another also applies to embodiments with more than two chambers.

The capacity or volume of the chambers for the product components may each be 10 cm ³ to 1000 cm ³ , and the capacity of the chambers and may be the same or different. The choice of the volumes of the individual chambers and depends on the desired ratio of the volumes of the individual product components. Preferably, the volumes of the chambers are the same. The volume ratio between the first and the second product component is according to the invention preferably in a range of 1: 3 to 3: 1, a volume ratio in the range of 1: 1, 5 to 1, 5: 1 is preferred according to the invention, particularly preferred is a quantitative ratio of 1: 1.

The dispenser has a dispensing device with an outlet opening which, at least in the operating mode, is in fluid communication with the two chambers and in fluid communication or can be brought into fluid connection with the latter via valves. During the removal of the product composition, the two product components are mixed together by means of the mixing device described above and taken together downstream of the common outlet opening. As a result, the usually reactive product components come into contact with each other only during product application and in this case form the ready-to-use mixture.

Depending on the embodiment of the entire dispenser, the dispensing device can be, for example, a pressure vessel dispenser, a pumping element, a dispenser with valve or any other suitable dispensing device for pasty masses. In this case, the removal of the mixed product composition via the common outlet opening can be effected by pressing the actuating element or by pumping the pumping element. Alternatively, the dispenser may be a squeeze container. In this case, the removal of the mixed product composition is preferably carried out by squeezing the squeeze container, the pressure on the squeeze container resulting in the exit of the mixed product composition from the common outlet opening. A particularly user-friendly variant of the dispenser comprises at least one pressure vessel in which the at least two chambers for the product components are arranged, wherein the pressure vessel contains at least one propellant from the group of propane, propene, n-butane, isobutane, isobutene, n-pentane, Penten, iso-pentane, iso-pentene, air, nitrogen, argon, N2O and / or CO2. Within this group, the permanent gases air, nitrogen, argon, N2O and / or CO2 are preferred, most preferably nitrogen, argon and / or CO2. As such pressure vessels are basically vessels made of metal (aluminum, tinplate, tin), protected or non-splitterndem plastic or glass, which is coated on the outside with plastic in question. When choosing a suitable pressure vessel play factors such. As pressure and fracture resistance, corrosion resistance, easy fillability as well as aesthetic considerations, handiness, printability, etc. a role. Special internal protective lacquers can additionally improve or ensure, as required, the corrosion resistance with respect to the product components contained in the pressure vessel.

According to a preferred embodiment of the dispenser with pressure vessel, the two separate chambers of two deformable bags are formed, preferably made of laminated aluminum, which are each in fluid communication with the outlet opening, at least in the actuation mode. Both bags are located in a can-shaped pressure vessel, wherein the pressure vessel, together with the pressure vessel dispensing device, seals off the dispenser to the outside in a pressure-tight manner. The space between the outer wall of the bag and the inner wall of the pressure vessel is filled with at least one propellant or propellant gas. Corresponding dispensers are known, for example, from US 2009/0108021 A1. A particularly preferred product for the treatment of keratinic fibers is therefore characterized by such a dispenser with a corresponding pressure vessel, which also has the mixing device described above. Such a trained donor not only takes into account the chemical reactivity of the individual product components used, but also ensures, as a result of mixing, for a high effectiveness of the applied overall formulation. Particularly good effects according to the invention are achieved if the internal pressure of the pressure vessel is at least 1.8 bar, in particular at least 2.5 bar.

Furthermore, it has been found useful in connection with the invention if the propellant gases are contained in certain pressure ranges in the dispenser or pressure vessel. In a preferred embodiment, the dispensers according to the invention contain one or more further propellant gases at a pressure of 3-12 bar, preferably from 4 to 10 bar, and more preferably from 5 to 8 bar - in each case based on the pressure of the propellant gases in the space between the bag-shaped Chambers and the pressure vessel.

A preferred form of use of the dispenser arises when product components are provided in the chambers, which form a cosmetic, in particular hair cosmetic product composition. Especially hair cosmetic product compositions, which in The application may cause staining and / or lightening of keratinous fibers may be used in conjunction with the inventive dispenser to the benefit of the consumer. As such, for the purposes of the invention particularly suitable, multi-component hair cosmetic product compositions are, for example, to name such as in the patent applications DE 102013217027, DE 102013217026, DE 102013217025, DE

102013217024 are described. In this respect, dispensers according to the invention can be advantageously used in processes for the oxidative change of the hair color. These methods are characterized by particular ease of use for the consumer, since the consuming and error-prone production of the application mixtures by the consumer is eliminated. In addition, application of the product composition enables a particularly uniform color result, since it is possible by the special rheological approximation of the product components to remove the two product components during the entire application process in precisely defined, always equal proportions. The removal of the product composition is usually carried out in portions, so that the chambers of the donor are gradually emptied in a defined ratio to each other. As a rule, the consumer will remove the amount of mixed product composition necessary for the coloring or whitening of one or more strands or hairpieces from the dispenser, and then apply these to the hair. This process will be repeated by the consumer until either the dispenser is completely emptied or until the consumer has treated all the desired parts of the hair.

In particular, when packaging the dispenser with at least one pressure vessel and a continuous removal of the application mixture is ensured, since in this case the chambers for the product components are continuously emptied by actuation of the dispenser, whereby the product composition of the individual components at each time of removal is the same and is defined.

Further inventive features will be explained below with reference to the embodiments shown in the figures.

It shows:

Fig. 1 shows an embodiment of a dispenser with pressure vessel in side view;

FIG. 2 shows the dispenser of the dispenser according to FIG. 1 in plan view; FIG.

3 shows a first embodiment of the mixing device in four views;

Fig. 4 shows a second embodiment of the mixing device in two views The exemplary embodiments shown in FIGS. 1 to 4 illustrate the basic structure of a dispenser 1 with a dispenser 10 according to the invention for flowable product compositions, which consist of several product components. The product components are held separately until the actual product applications in separate chambers 21, 22.

In the present exemplary embodiment, in particular according to FIGS. 1-2, there is a dispenser 1 with dispenser 10 for a hair cosmetic product composition, in particular a multi-component hair dye. Such a dispenser 1 initially comprises a pressure vessel 20, in which the reactive and thus mutually incompatible product components in separate chambers 21, 22 are kept separately. In this case, the chambers 21, 22, in the present case as flexible bags 21, 22 are formed, which receive the product components inside. The internal volume 23 of the pressure vessel 20, d. H. the space between the pressure vessel wall and the bags 21, 22, which is bounded by a rigid shell 24, is filled with a suitable propellant, so that the product components within the bags 21, 22 are under constant pressure over the entire period of use of the dispenser 1. Accordingly, the pressure vessel 20 or the casing 24 consists of a sufficiently pressure-resistant material, in particular of metal (eg aluminum), glass, plastic or a material of comparable properties. In addition to the pressure resistance, especially the resistance to the partly reactive product components used is an important requirement for said pressure vessel material. To dispense the product components from the bag chambers 21, 22, the dispenser 1 has at the top of the dispenser 10 via a switch-like actuator 1 first The actuating element 1 1 is in each case coupled to a not shown switching element of the bag chambers 21, 22 which closes the respective bag chamber 21, 22 in the sleep mode and opens the respective bag chamber 21, 22 for product delivery in the actuation mode. Such a switching element may be formed, for example, as a switchable valve or comparatively acting device. Due to the pressure conditions within the pressure vessel 20, the product components are automatically discharged from the respective bag chambers 21, 22 in the actuation mode.

For simple and user-friendly dispensing of product compositions, which are composed of several product components, the dispenser not only has at least two chambers 21, 22 but also includes a mixing device 30, 31, 30 ', 31'. The mixing device 30, 31, 30 ', 31' is at least fluidly connected to the interior of the bag chambers 21, 22 and has at least two inlet openings 32. Each bag chamber 21, 22 is connected to at least one of the inlet openings 32 at least in the actuation mode. Preferably, each individual bag chamber 21, 22 is in fluid communication with in each case one inlet opening 32. In this way, an unwanted contact of the reactive product components is effectively prevented until the actual product delivery. The mixing device 30, 31, 30 ', 31' comprises at the downstream end at least one, preferably exactly one, outlet opening 33 for product delivery. Between the inlet openings 32 and the outlet opening 33 For example, the mixing device 30, 31, 30 ', 31' has a channel-like mixing section 35, 35 'with internal flow baffles or baffles 36, which cause fluid-induced swirling and thus thorough mixing in the fluid flowing through the mixing section. Ideally, the mixing section 35, 35 'forms a closed channel, into which the fixedly arranged flow baffles or baffles 36 protrude to said flow influencing. Specifically, the fixed flow baffles or baffles 36 are designed in particular as baffles, plate-like or helical baffles, which are specifically adapted in detail to the specific rheological properties of the associated fluid. Such mixing devices 30, 31, 30 ', 31' with fixed flow internals or baffles 36 within the mixing section 35, 35 'are often also referred to as static mixer. Within such static mixer, the mixing of the fluid during the flow through the mixing section 35, 35 'takes place concretely as a result of the flow around the flow installations or baffles 36.

To ensure a sufficient mixing quality within the product composition by means of the mixing device 30, 31, 30 ', 31' according to the invention, it is necessary for the mixing section 35, 35 'to have a sufficient length L. In this case, the length L of the mixing section 35, 35 'is determined as the length L of the channel-like route section between the inlet openings 32 and the outlet opening 33 of the mixing device 30, 31, 30', 31 '. In the present application in multicomponent hair cosmetic product compositions, especially hair dye compositions, the mixing section 35, 35 'at least 6cm long. However, this may vary slightly depending on the rheological properties of the product components as well as the product composition. However, the mixing section 35, 35 'preferably has a length of between 6-15 cm. In order to accommodate this sufficient length L of the mixing section 35, 35 'in the smallest possible space, the mixing section 35, 35' is not straight but at least partially curved in shape. In this case, the mixing section 35, 35 'at least one curved portion 34, 37 on which includes a curve of at least 45 °. This curved mixing section 34, 37 is preferably provided immediately downstream of the inlet openings 32, ie exactly at the point where the two product components meet in dispensing operation. As a result, mixture of the individual product components is promoted immediately after their coincidence. A significant advantage of this curved mixing path guide 34, 37 is that can be accommodated in this way a large mixing length L in a small space. In this respect, very compact mixing devices 30, 31 according to the invention can be realized which, due to a large mixing path length L, provide a sufficient mixing quality. In particular, due to the curved mixing path, the length of the mixing section 35, 35 'exceeds the largest outer dimension I of the mixing device 30, 31, 30', 31 'or the entire dispenser 10. Overall, the curved mixing sections 34, 37 not only ensure the compact design of the mixing device 30, 31, 30 ', 31' but promote due to the curved course also quite generally the mixing of the flowing product components. In one For example, the curved mixing section 34, 37 causes a slowing of the flow while increasing the flow turbulence. This results in a stronger fluid swirling during the flow through the mixing section 35, 35 ', which has a direct positive influence on the mixing quality.

According to a first embodiment of the mixing device 30, 31 according to FIG. 3, the curved mixing section 34 is S-shaped or meander-shaped. In this case, the curved mixing section 34 includes at least two sharp curves of more than 90 °. Of course, it is also conceivable within the meaning of the invention to realize a meandering mixing section 34 with more than two sharp curves. Such a mixing line guide 34 is particularly compact and can be realized in a very small space without affecting the mixing function.

An alternative second embodiment of the mixing device 30 ', 31' according to FIG. 4 comprises a curved mixing path section 37 which has a spiral shape. This spiral-shaped mixing section 37 also includes at least one continuous sharp curve of more than 90 °. In the present embodiment according to FIG. 4, the spiral-shaped mixing section 37 flows through from the inside to the outside, so that the inlet openings 32 coincide with the beginning of the spiral-shaped mixing section 37. Of course, in the sense of the invention, the reverse flow through the spiral mixing section 37, d. H. outside to inside conceivable. These spiral-shaped mixing line guide 37 can also be implemented in a particularly compact design of the mixing device 30 ', 31'.

The inventive curved course of the respective mixing section 34, 37 can basically just not just as shown in the embodiments, d. H. realize two-dimensional but also spatially, d. H. three-dimensional. Above all, the three-dimensional curved course of the mixing section, wherein the curves not only run in a single plane, allows a more space-saving design of the mixing section 35, 35 'and the entire mixing device 30, 31, 30', 31 '.

The exemplary embodiments of the mixing device 30, 31, 30 ', 31' according to FIGS. 1-4 furthermore also have a straight mixing section 38, which on the one hand connects downstream to the curved mixing section 34, 37 and on the other hand terminates with the outlet opening 33. This straight mixing section 38 is useful especially for the dispenser 1 shown for hair cosmetic product compositions, since such a straight mixing section 38 with nozzle-like outlet opening 33 allows a particularly accurate portioning and exact local application of the product composition. Last but not least supports the straight mixing section 38, the treatment of hard to reach areas in the field of hair cosmetic application, such as the hair root or the hair roots. Especially for ease of manufacture of the mixing device 30, 31, 30 ', 31' according to the invention, this is in each case made in two parts, with an upper 30, 30 'and a lower part 31, 31'. In particular, in view of the design of the flow baffles 36 with undercuts, such a two-part embodiment with upper 30, 30 'and lower part 31, 31' can still within the manufacturing process, for. B. an injection molding process, easy demold.

In general, the embodiments according to FIGS. 1-4 illustrate the solution according to the invention using the example of a hair cosmetic dispenser 1 with a particularly user-friendly pressure vessel. However, the invention is by no means limited to these embodiments. Rather, in the context of the invention, above all the described mixing device variants can be combined with other embodiments of the dispensing device as well as the containers and chambers as desired.

reference numeral

36 baffles (flow installations)

I. Dispenser 37 spiral mixing section

38 straight mixing section

10. Dispensing device

I i. actuator

L mixing length

I largest external dimension of Mischvorrich¬

20. Pressure vessel

tung / dispensing device

21st Chamber

22nd Chamber

23. Interior

30, 30 'mixing device (upper part)

31, 31 'mixing device (lower part)

32 inlet opening

33 outlet opening

34 meandering section

35, 35 'mixing section

Claims

claims

A dispenser (10) for dispensing a flowable product composition from a plurality of product components held separately from one another for dispensing the product dispensing, comprising at least two inlet openings (32) for the product components, having at least one outlet opening (33). for dispensing the product composition, wherein inlet openings (32) and outlet opening (33) are fluidly connected to one another, and with a mixing device (30, 31, 30 ', 31') arranged between inlet openings (32) and outlet openings (33), which is one of Product components through-flow, channel-like mixing section (35, 35 ') with flow fittings (36) for flow-related mixing of the product components, characterized in that the length (L) of the mixing section (35, 35') is greater than the largest outer dimension (I) of the dispensing device (10).

2. Dispensing device (10) according to claim 1, characterized in that the ratio of length (L) of the mixing section (35, 35 ') to the mean diameter of the channel-like mixing section () is between 5: 1 and 30: 1.

3. Dispensing device (10) according to one of the preceding claims, characterized in that the mixing section (35, 35 ') has a minimum length (L) of 6cm.

4. Dispensing device (10) according to any one of the preceding claims, characterized in that the mixing section (35, 35 ') at least one curved portion (34, 37) which comprises at least a curve of at least 45 °.

5. Dispensing device (10) according to claim 4, characterized in that the mixing section (35, 35 ') has at least one S, meandering or spiraling section (34, 37).

6. Dispensing device (10) according to one of the preceding claims, characterized in that the mixing device (30, 31, 30 ', 31') has a two-part construction with a lower (31, 31 ') and an upper part (30, 30 ').

A dispenser (1) for storing and dispensing a flowable product composition comprising a plurality of product components held separately from the dispenser, comprising at least one container (20) having at least two chambers (21, 22) for separately containing the product components and a dispenser (10) according to one of the preceding claims, wherein the dispensing device (10) in such a way to the / the container (20) is coupled such that the inlet openings (32) are fluid-connected to the chambers (21, 22) at least during the product delivery.

8. dispenser (1) according to claim 7, characterized in that the product components have substantially the same rheological product properties, in particular substantially the same viscosity.

9. Dispenser (1) according to any one of claims 7-8, characterized by a pressure vessel (20) whose internal volume (23) is under pressure and by a sheath (24) is limited, wherein in the pressurized internal volume (23) at least two bags (21, 22) are arranged, which form the chambers (21, 22) for the product components.

10. Dispenser (1) according to any one of claims 7-9, characterized in that in the chambers (21, 22) product components are provided which form a cosmetic, especially hair cosmetic product composition.