EP0320510A1

EP0320510A1 - Device for storing and controlled dispensing of pressurized products and a method for the manufacturing of said device.

Info

Publication number: EP0320510A1
Application number: EP88905346A
Authority: EP
Inventors: Winfried Jean Werding
Original assignee: Individual
Current assignee: EP Systems SA
Priority date: 1987-06-26
Filing date: 1988-06-27
Publication date: 1989-06-21
Anticipated expiration: 2008-06-27
Also published as: FI890836A0; DK89189A; FI890836A; DK89189D0; IN171132B; AU1950188A; JP2612758B2; JPH02500572A; AU606182B2; WO1988010221A1; US4969577A; EP0320510B1; BR8807106A; DE3886184D1

Abstract

Un sachet flexible rempli de produit (5) est disposé dans un récipient rigide (1) et est soudé à la soupape (A). Celle-ci rend le récipient (1) absolument étanche à l'aide d'une membrane (17) annulaire et d'une double nervure annulaire (18) qui sont comprimées dans le col (19) du récipient respectivement dans la rainure annulaire (20) ainsi que par le fait que la douille de fermeture (22) est soudée (23) sur le récipient. Le produit est comprimé dans le récipient (1) en enfonçant le piston (8) de la soupape dans le sachet (4) et de l'air comprimé est chassé dans le récipient par l'orifice (11) de l'assiette de la soupape. La soupape (A) obture le sachet (4) et le disque d'étanchéité (12) fonctionnant comme clapet de retenue, rend le récipient étanche et empêche des pertes de pression, de sorte qu'à l'ouverture de la soupape la pression du récipient comprime la poche (4) afin que le produit puisse être distribué par la tête de pulvérisation (14).A flexible bag filled with product (5) is placed in a rigid container (1) and is welded to the valve (A). This makes the container (1) absolutely watertight by means of an annular membrane (17) and a double annular rib (18) which are compressed in the neck (19) of the container respectively in the annular groove ( 20) as well as by the fact that the closure sleeve (22) is welded (23) to the container. The product is compressed in the container (1) by pushing the piston (8) of the valve into the bag (4) and compressed air is expelled into the container through the orifice (11) of the plate of the valve. The valve (A) closes the bag (4) and the sealing disc (12) functioning as a check valve, seals the container and prevents pressure losses, so that when the valve opens the pressure of the container compresses the bag (4) so that the product can be dispensed by the spray head (14).

Description

DEVICE FOR STORING AND CONTROLLED DELIVERY OF PRODUCTS UNDER PRESSURE

The present invention relates to a device according to the preamble of claim 1. This device allows, compared to the conventional spray cans, either a reduced amount of liquid gas or compressed gases to be used as the driving force.

The ban on fully halogenated hydrocarbons, known under the names FRIGEN or FREON, has led to the massive use of hydrocarbons such as propane and butane or dimethyl ether and their mixtures. FRIGEN and FREON are dangerous for the ozone layer surrounding the earth and butane and propane. As well as dimethyl ether because of their risk of explosion for the bottling industry, but also for the consumer, since deaths from explosions can be mourned.

In addition to these flammable gases, the non-flammable, only partially halogenated FREON 22 (chemical formula CHC1F2) _{»is known} as a blowing agent. It may also be used in the USA and the Scandinavian countries, where FREON and FRIGEN are prohibited, because the FREON 22 still contains a hydrogen atom and is therefore not as stable as the fully halogenated hydrocarbons. However, since the vapor pressure of the non-flammable FREON 22 is very high and is around 9 bar at 20 ° C, it must either be mixed with a gas with lower vapor pressure, such as dimethyl ether or butane, but which is combustible, or used in a reduced amount , that is, depending on the container quality, between 18 and 50 percent by weight. The use in glass flacons without plastic for eau de toilette is particularly problematic because the pressure must not exceed 1.5 bar at 20 ° C, but depending on the content of water or essential oil it already reaches FREON 22 with 18% to 20% becomes. But since the atomizing The quality of conventional sprays largely depends on the proportion of liquefied gas and thus its expansion or better explosion force in contact with the atmospheric pressure, the percentage of approx. 20% FREON 22 instead of the usual 50% FREON 114/12 is not sufficient to atomize an eau de toilette in such a way that the droplet size is so fine that the spray is considered "not wet".

Even with metal cans there are pressure limits which must not be exceeded by law, so that here too a small amount of FREON 22 is used, compared to the conventional spray cans.

The search for a solution to the problem described above has led to a spray nozzle as described in European Patent No. 0000688 and which, from a purely mechanical point of view, emits a very fine atomization. Devices have also been developed as described in various versions in European Patents No. 0057226 and No. 0109361 and PCT application CH 86/00103, published on January 20, 1987 under number WO 87/00513, and which allow compressed air to be used as the driving force instead of liquefied petroleum gas, with an at least approximately constant discharge rate per unit of time and constant particle size being achieved despite falling discharge pressure.

Both the use of a reduced liquid gas content of only about 20% or compressed air leads to difficulties. The aerosol valves on the market all have an afterflow of product despite the valve being closed after use. If such a valve is used with a high (normal) percentage of liquefied gas, this flow will not be seen, because these gases also serve as solvents in their liquid phase and are mixed with the active product when the valve is opened with the atmospheric pressure leads to an explosive evaporation of both the liquid gas and the product carrier such as alcohol or water. However, if compressed gases such as air or nitrogen are used as the ejection force, or if a low percentage of liquefied gas is used, less than 25%, this rapid evaporation factor is missing or it is so low that the rabid evaporation which hides the afterflow is eliminated .

The backflow is due to several factors. In so-called "male" valves, a piston is provided with side holes which, when the valve is closed, lie within the wall thickness of the rubber seal, so that no product can escape. However, since the central hole of the seal is punched out, it has vertical grooves that are parallel to the axis and are more or less deep depending on the quality or wear of the punching tool, through which product can continue to flow after the valve has been closed, until it does so the rubber closes by squeezing into the side holes of the piston. In so-called "female" valves, the valve closure is achieved by penetration of the ring rib of a piston into a rubber sealing washer. The rear sight of most ring ribs is 0.4 to 0.5 mm wide, which, depending on the hardness of the rubber, leads to a slow penetration of the piston into the seal, which also results in a reflow after closure when these valves are used leads.

Depending on the valve quality, up to 0.03 ml of product flow in per valve opening. This reflow is not only unattractive, it also leads, especially in the case of hair lacquers, to a blockage of the atomizing nozzles by drying out the film bander if the ejection force is achieved by a low percentage of liquid gas or compressed gases. Also, the use of compressed gases or a deep liquefied gas fraction leads to another problem that leads to this

REPLACEMENT LEAF can lead to the fact that not all product can be ejected from the container due to a lack of pressure.

In a spray can filled with liquefied petroleum gas, the pressure is built up again by continuous gasification of the liquid phase whenever the pressure drops according to physical law by emptying the can, so that there is practically a constant pressure in the can. With a low percentage of liquefied petroleum gas, the amount of gas is just enough to keep the pressure constant and to empty the entire contents of the container. However, if you spray with a valve opening for too long, the gasification leads to a cooling of the can, which slows down the gasification, so that not only the pressure drops, but also more liquid gas is expelled than intended and therefore ultimately for the complete removal - The can is empty. By using the can with the spray head down, gas is lost, which is then missing again.

When using compressed gases as ejection force, this problem is much more serious because the pressure cannot be rebuilt. Depending on the position of the can, the pressure can be completely lost, so that the remaining contents of the can are lost because they can no longer be ejected.

Despite the seal, there may also be a loss of pressure between the valve disc and the can neck. For example, aluminum cans are produced by a deep-drawing process of aluminum disks, with grooves running parallel to the can axis in the outer wall of the can, which can be between 0.02 and 0.08 mm deep depending on the can diameter, but are so narrow that the outer rubber seal cannot penetrate it and therefore cannot seal it. Although, depending on the type of box, these grooves are ground off on the neck of the box or filled with a varnish coating there is a release of pressure if the fastening of the valve is not carried out with the necessary precision.

A pressure loss of compressed gases due to incorrect holding of the can can be avoided by using a two-chamber system in which the product is stored in a flexible inner container and the ejection force, compressed gas, is stored in the rigid outer container. The latter acts on the flexible inner container and compresses it, thereby expelling the product inside. Such systems are known. However, their flexible inner containers must be inserted into them before the can bottom is attached or the shoulder part rolls in the case of monoblock cans. Furthermore, the filling of the compressed gas is relatively complicated and requires high precision, which is expensive, since the bottom of the can is provided with an opening which can be closed with a rubber stopper, next to which, if it is not yet completely in the opening is pressed in, the compressed gas is introduced into the can, after which the rubber stopper is pressed completely into the opening, which it then hermetically seals. In addition to the necessary precision, this gassing process requires a lot of time, so that mass production is expensive.

Metal cans require a multiple of the energy required to produce plastic and cans from this material, both for extracting the metal as such and for producing the cans. Depending on the type of metal, corrosion problems can also occur.

In order to avoid pressure losses due to incorrect holding of the can when using compressed gases, there is

Market valves which, thanks to a ball, allow the product to be sprayed even when the can is held upside down. However, they can lose pressure, N if the container is held at an angle and the riser of the tank

Valve, because raktisch always no longer bends 12 The present invention solves the problems described above and relates to a device for the storage and controlled delivery of products under pressure, as defined in claim 1.

The invention is described in detail below and illustrated with advantageous, non-restrictive exemplary embodiments. The drawing shows in:

1 shows a section through the subject matter of the invention in the filled state,

2 shows a section through a valve unit before a bag is welded on and inserted into a plastic container,

3 shows a section through a valve piston,

4 shows a plan view of the valve piston according to FIG. 3,

5 shows a section through a closed valve,

6 shows a section through an open valve according to FIG. 3,

7 is a view of an embodiment of a welded bag before it is filled,

8 is a side view of this bag, which is attached to a valve,

Fig. 9 shows a section through a siege in a plastic tube gela _¬ metal core prior to welding a bag

10 shows a section through the subject matter of the invention according to FIG. 9, mounted between two welding jaws, 11 is a partial view of a bag after welding onto the plastic tube according to FIGS. 9 and 10,

12 is a view of a valve in which the valve body is provided for the direct welding of a bag,

13 shows a perspective view of the valve body, as shown in FIG. 12, between two welding blocks,

14 shows a plan view of a bag after welding onto a valve body according to FIG. 12,

Fig. 15 is a partial view of a bag according to the ^'valve body by welding on Fig. 12,

16 is a view of a valve unit carrying a folded bag,

17 shows a section through a metal can with a greatly enlarged can neck with a metal valve disc,

18 shows a section through the neck of a plastic can with a greatly enlarged can neck with a metal valve disc,

19 shows a section through a valve unit for viscous products, such as oils, creams, pastes, gels, etc.

1 shows a device according to the invention in its entirety. The container 1, here preferably made of PET (polyethylene terephthalate), has a hemispherical base 2 which is provided with the base cap 3 for standing. It contains the bag 4 in which the product 5 is stored. The bag 4 is welded onto the valve body 6 which is attached to the plastic valve plate 7 and contains the piston 8 which is pressed strongly against the rubber seal 10 by means of the spring 9 and partially penetrates into it. The plastic valve plate 7 is provided with the bore 11, which, when the container 1 is under pressure, is closed by means of the rubber seal 12, which is held with the flange 13 of the valve body 6 when the container 1 is not yet under There is pressure. The piston 8 carries the spray head 14. In order to hermetically seal the container 1 and thus to avoid any loss of pressure, the plastic valve disk 7 is provided with the ring membrane 17 and the double ring rib 18, the ring membrane 17 being the can neck 19 and Ring rib 18 close the ring groove 20. The ring membrane 17 and the ring rib 18 are drawn into their mentioned seats in a sealing manner by means of the snap closure 21. Ultimately, the closure sleeve 22 prevents the snap closure 21 from opening and, thanks to its welding 23 to the container 1, secures its hermetic closure. Thanks to its enlargement, FIG. 2 shows the above details in detail. As explained in more detail with FIGS. 12-15, the valve body 6 is provided with side ribs 15 which form the beads 16 after the bag 4 has been welded on by means of the welding surface 24. The underside of the closure sleeve 22 has an annular groove 25, which prevents the bore 11 from being covered, so that this bore is not visible from the outside, but can nevertheless be used to pressurize the container 1 from the outside, the seal 12 then serving as a check valve is working. Finally, the device according to the invention is closed with the valve cap 26. The device is assembled and filled as follows:

The valve unit A carries, as shown in FIG. 16, a folded bag 4 which is kept folded at the valve height with a paper ring 79 and at the opposite end with the paper ring 80. The paper thickness of the rings 27 and 28 is chosen so that it is inside the bag 4 when it is filled of the container 1 tear and thus ensure the unfolding of the bag 4. The valve unit A with the folded bag 4, which behaves practically like a "normal" riser pipe and can be sorted by any commercially available filling machine, is inserted mechanically into the container 1 until one part of the snap closure 21 into the corresponding part of the can neck 19 engages, after which the closure sleeve 22 is then also welded mechanically onto the can neck 19 at height 23. This not only prevents the snap closure 21 from disengaging, but also allows a per, thanks to an ultrasound welding, with which the closure sleeve 22, which is made of the same material as the can neck 19, is homogeneously connected to it ¬ perfect sealing of the device according to the invention. Added to this is sealing, which is created by the ring membrane 17 being inserted in the canned shark 19 and the double ring rib 18 in the ring groove 20. This sealing solution is important in order to avoid any loss of compressed air which would lead to the fact that not all of the product 5 can escape from the container 1 due to a lack of ejection force. Before attaching the spray head 14 or another dispensing element, the bag 4 is filled with the product 5 via the valve body 6 by pushing the piston 8 away from the seal 10. After placing a special filling head on the closure sleeve 22, compressed air is introduced into the container 1 through the bore 11 of the valve plate 7, which then pressurizes the product in the bag 4. After placing the spray head 14 or, depending on the nature of the product, another dispensing element, the device according to the invention is ready for use. Ultimately, it is closed with the valve cap 26.

The above-described reflow of product from the valve, even after the valve has been closed, is eliminated thanks to the piston 8 according to the invention. This is provided with the ring ribs 27 _> 28 and 29, whereby the ring grooves 30 and 31 arise. As shown in FIG. 3, the ring ribs 27, 28 and 29 penetrate into the seal 10, as a result of which it is pressed into the ring grooves 30 and 31, so that the valve unit A is closed immediately.

If the valve unit A is used with compressed air as the driving force, it needs large cross-sections and a large number of flow channels 32 and 33, as shown in FIG. 4, in order to ensure the greatest possible thrust, especially after the pressure has been reduced .

For the use of the valve according to the invention for aerosol doses which use liquefied gases, the percentage of which must be reduced due to excessively high vapor pressure or the amount of which one wants to reduce for safety reasons, as a result of which afterflow after valve closure occurs, a design is as in 5 and 6 Darge¬ represents necessary. The valve unit A according to the invention consists of the valve body 34, which is provided with the riser pipe holder 35, the piston 36 with the pin 37, the compression spring 38, the inner seal 39, the valve plate 40 with the container seal 41 and the piston tube 42. The valve disk 40 is provided with the bore 43, which, when a container closed with the valve unit A is under pressure, is sealed by means of the sealing disk 44, which is held by the flange 45. The bottom of the valve body 34 is provided with ribs 46 on which the spring 38 rests. As a result, the product penetrating into the valve body can reach below the spring 38 between the ribs 46 in the direction of the seal 39. The piston 36 carries the spring 38. It has guide ribs 47 and is shown enlarged in FIG. 3 with ribs and grooves. The rear sight 48 of the valve body 34 is provided with vertical grooves 49, which allow gas to be gassed into a container closed with the valve unit A between the valve plate 40 and the seal 39, without opening the valve. The The base diameter of the pin 37 is slightly smaller than the inside diameter of the piston tube 42, so that a gap 50 is created. Parallel to the pin 37 is the groove 51, which opens into the groove 52 perpendicular to it. A product can therefore only emerge through the grooves 51 and 52 and the gap 50 when the valve is open. Since these passages have predetermined cross sections, the valve according to the invention has a calibrated output quantity per unit of time, specifically regardless of the distance traveled by the piston 36.

The use of a small percentage of liquid gas, e.g. FREON 22, leads to an ejection pressure of 1.5 bar at 20 ° C. Despite the use of a spray nozzle described in European Patent No. 0000688, which has a very high "mechanical break-up" effect, the atomization quality, despite the presence of a liquid gas component in the product being ejected, is still too wet because of this liquid gas component is too low for the described explosive evaporation. With the valve according to the invention, "drier" atomization can now be achieved.

As is known, liquid gas remains liquid under a certain pressure acting on it and only gasifies when this pressure, e.g. when emptying a container, becomes smaller. It is also known that a product under pressure can be accelerated with small flow cross-sections and thereby reduces its pressure, which means that depending on the acceleration of the product, its pressure drops below the pressure that keeps the gas liquid, so that it can gasify thanks to this acceleration.

This is shown in FIG. 6. If one presses on the piston tube 42, the piston 36 moves away from the seal 39, as a result of which the product 53 under pressure can reach the gap 50 via the grooves 51 and 52. Since the cross cut of the gap 50 is dimensioned such that the product flowing there is accelerated, it loses pressure and part of the liquid gas portion can gasify, as shown by the bubbles 54. Thus, a mixture of active product (alcohol, perfume, etc.) liquid gas and gaseous gas enters the spray nozzle, which then atomizes the active product mechanically, after which the explosive evaporation of the liquid gas portion, supported by the gaseous (bubbles 54 ) Gas fraction that refines the mechanical atomization so that the droplet size becomes so fine that rapid evaporation occurs, so the spray is not considered to be "wet".

The liquid gas is normally introduced into the aerosol container via the valve, the valve being opened mechanically, unless a special gassing device is used which, as described, the liquid gas between the valve plate 40 and the seal 39 via the grooves 49 inserted into the can. Since the valve according to the invention must have a very small flow cross-section for its described function, the gassing takes a lot of time, which is undesirable for mass production. Thanks to the bore 43 and the sealing washer 44, the gassing can take place quickly.

As described in the introduction, there are various two-chamber cans in which the product is stored in a flexible inner container, which is compressed either by liquid gas in a rigid container or compressed gases such as air or nitrogen, so that when the valve is opened, it is in the flexible container Product is ejected.

If the use of liquefied gas is about not bringing it into contact with the product, but still having a constant pressure available, the use of compressed gases to avoid any pressure loss. However, since the commercially available flexible containers are expensive, a cheaper solution has to be found.

7 and 8 represent such a solution. The nipple 57 of the bag 58 is fastened to the bag carrier 55 of the valve body 56, where it is prevented from jumping off by means of a snap closure (not shown). The nipple 57 is provided with the washer 59, which has concentrically extending grooves 60. It consists of the same plastic material, for example polyethylene or polypropylene, as the inside of the foils intended to be welded together, so that the disc 59 can be welded to the foil material. The bag 58 can be produced from a composite film in which there is an aluminum foil between two plastic foils, so that a migration of fragrances or air oxygen is avoided with an aluminum foil thickness of 0.012 mm. This solution is mainly used when using the bag 58 for storing perfumes or foods and medicaments, in which migration, as described above, must be avoided. To produce the bag, a plastic film is provided with a hole through which the nipple 57 is inserted from the film side provided as the inside, so that the disc 59, because it is made of the same material as the inside of the bag, can be welded to it . The film is then folded and provided with the welding surface 61 by means of heat, so that a bag is produced.

9, 10 and 11 show another embodiment of a bag according to the invention. This is a piece of pipe 62 which, on the one hand, is used to weld the foils from the same material and, on the other hand, becomes a nipple 63 which is attached to a valve, not shown, as also described above. Do you want two Foils are heat-welded to a tube part, so longitudinal channels are formed along the points of contact of the foils on the tube piece 62, which leave a bag produced in this way leaking. This problem can be solved as follows: The wall thickness of the pipe section 62 should preferably be at least 1 mm. A metal core 64 is introduced into the pipe section 62, the diameter of which is smaller than the inside diameter of the pipe section 62. After inserting the tube piece 62 prepared in this way between two plastic foils, they are clamped with two welding jaws 65 and 66, each of which has a semicircular groove 67, the diameter of which is smaller than the outer diameter of the tube piece 62. Under the heat of the welding jaws 65 and 66 the plastic material of the inner wall of the plastic foils and the tube piece becomes liquid and deforms to beads 68 and 69 and the rest of the tube piece 62 lies against the metal core 64, so that the foils are homogeneously connected to the tube piece 62 and the longitudinal described canals are avoided.

However, if a bag according to the invention is to be placed directly on a valve unit A, as illustrated in FIGS. 12, 13, 14 and 15, a metal core 64 cannot be used. In order to avoid the longitudinal channels described, the valve body 70 is to be provided with side wings 71 and 72. After inserting the valve body 70 between two plastic foils, these are clamped between two welding jaws 73 and 74, each of which has a semicircular groove 75, the diameter of which is smaller than the outer diameter of the valve body 70. The valve body deforms under the heat of the welding jaws 70 in such a way that the side wings 71 and 72 flow between the foils and there avoid the longitudinal channels described above. This creates beads 76 and 77, which additionally improve the sealing of the bag. This solution is extremely advantageous in that, on the one hand, it avoids the work of pushing the bag onto a valve unit A and, on the other hand, guaranteed length, so that the bag receives a larger filling volume.

These above solutions of using a welded, very flexible bag have the advantage that they can be sorted by the existing aerosol filling machines and can be inserted into the cans in the usual way, without having to make any changes to the machines. 16 shows a bag 78 according to the invention, which is folded accordion-shaped and welded onto the valve unit A, the bag 78 being provided at the valve height with the paper ring 79 and at the opposite end with the paper ring 80, which is a Prevent the bag 79 from unfolding so that the bag 78 remains as rigid as a normal riser pipe and, although oversized, can be inserted into the customary cans. The paper ring thickness is selected so that it can withstand transport and sorting, but tear when the bag 78 is filled, if it is accommodated inside the can, so that the bag 78 can fully unfold. This solution also has the advantage that the folds form kinks which lead to fine, vertical grooves which remain even after unfolding and prevent the two welded foils from collapsing at valve height after a certain amount of product has been expelled, so that no product more can be emitted.

The use of compressed gases as a driving force leads to another problem described above. Placing and attaching a valve plate to the can neck requires a very high level of precision, which, however, is often insufficient when using compressed gases to avoid a leak between can neck 81 and valve unit A, as tests have shown. There are cans 82, FIG. 17 on the market, which are provided on the rear of the can neck 81 with a milled ring groove into which a rubber seal is inserted.

REPLACEMENT LEAF will. Experience shows that this is also not an absolute solution to the problem. According to the invention, this is solved in such a way that the can neck 81 has two ring grooves 83 and 84, not on the rear sight, but at an angle to the outside thereof, so that several corners 85 are formed which penetrate into the rubber seal, so that this the ring grooves 83 and 84 are constrained and thus ensure reliable sealing, even in the absence of absolute precision.

18 shows the can neck of a plastic can 87, which has stair-shaped ring steps 88 and 89, so that corners 90 are formed which penetrate into the rubber seal 92 when the valve disk 91 is rolled up, and thus provide a secure, leak-free closure secure the can 87.

19 shows a valve unit A which is used especially for dispensing viscous products. The valve body 93 presses a seal 94 made of elastic material, which carries an ogive-shaped wart directed downward, into the valve plate 96. The wart 95 is provided with a cut 97, which * is closed by means of the pressure indicated by the arrows 98 becomes. The dispensing head 99 is provided with the tube piece 100 which is inserted into the wart 95 and carries the diffuser 102, also made of elastic material. If the delivery head 99 is moved downward, the cut 97 of the wart 95 and the cut 103 of the diffuser 102 open, as shown in broken lines, so that product can be ejected. If you let go of the dispensing head, the pressure shown by the arrows 98 closes the cut 97 again and, because the wart 95 is made of elastic material which acts like a spring, it pushes the tube piece 100 back into its starting position. As a precaution, a metal spring 104 can be provided for this reset. By opening the cut 97 and the product output possible thereby, the cut 103 of the diffuser 102 is opened, which closes again when the product ejection pressure subsides, so that the product (not shown) in the delivery head 99 is protected from the outside air and cannot dry out. Dispensing head 99 houses a regulating disk 105, as described in patent no. DD 250 694 A5 of the German Democratic Republic, which, despite the reduction in pressure when using compressed gases, ensures an output quantity per unit of time that remains at least approximately constant . When using liquefied gases which compress the flexible bag, the use of a regulating disk 105 is also advantageous because changes in temperature lead to strong pressure fluctuations and thereby to variable output quantities per unit of time.

The devices described above and illustrated with the figures of the drawing are non-limiting exemplary embodiments of the invention.

Claims

PATENT CLAIMS

1. Device for the storage and controlled delivery of pressurized products, consisting of a rigid outer container, a flexible inner container, attached to a valve unit, a spray nozzle, or, depending on the nature of the product, a diffuser and, depending on the ein¬ used propellant, a discharge control, characterized in that the nozzle neck (19) with grooves (20, 83, 84), ring ribs (27, 28, 29) or stair-shaped steps (88, 89) is provided that if the rigid container (1) is made of plastic, on the outside of the can neck (19) a snap lock (21) is provided that a plastic valve plate (7) with the snap lock counterpart (21) is provided for the plastic valve plate (7 ) has a ring membrane (17) and a double ring rib (18) that a closure sleeve (22) is made of the same plastic material as the rigid container (1) and is connected to it by means of high frequency on the ring rib (23) of the The neck of the can (19) is welded, that valve plates made of plastic (7) as well as metal (40) are provided with a bore (40), that the valve bodies (6, 34) have support options (13, 45), on which there are sealing washers (12, 44) which hermetically seal the bore (12, 44) when the rigid container (1) is under pressure, so that the valve bodies (6, 93) have side wings (15) are provided that the valve bodies (6, 93) provided with side wings are made of the same plastic material as the inner wall of the flexible inner container (4) and are welded to it by means of heat that the flexible inner container (4) it is made from a folded plastic film by means of heat-welded seams (24, 61) that the valve pistons (8, 36) have at least two but preferably three ring ribs (27, 28, 29) and that a valve unit (A) for viscous products products is provided with an elastic seal (94) which a Wa rze (95) bears that this wart (95) has a cut (97) has that the dispensing head (99) is equipped with a tube piece (100) that is inserted into the wart (95), that the dispensing head (99) carries a diffuser (102) made of elastic material that the Diffuser (102) is provided with a cut (103) and that the dispensing head (99) carries a regulating disc (105), that the valve piston (8, 36) has at least one vertical flow channel (32, 51) and at least one horizontal channel (33 , 52).

2. Device according to claim 1, characterized in that the valve piston (7) is provided with four vertical channels (32) and four horizontal channels.

3. Device according to claim 1, characterized in that the valve piston (36) is provided with a pin (37), the base diameter of which is smaller than the inner diameter of the piston tube (42) and that the piston (26) has only one vertical channel ( 51) and has only one horizontal channel (52).

4. The device according to claim 1, characterized in that the bag (58) is provided with a nipple (57) in order to allow it to be plugged onto a riser pipe holder (55) so that the nipple (57) has a disc (59), which has grooves (60) and that the disc (59) is welded to the inner wall of the bag (58) by means of heat.

5. The device according to claim 1, characterized in that a pipe section (62) made of the same material as the inner wall of a bag (4), that for heat welding the bag film, a metal core (64) whose diameter is smaller than the inside diameter of the pipe section (62) and into which it is introduced before welding and that the diameters of the half-grooves (67) of the welding jaws (65, 66) are smaller than the outside diameter of the pipe section (62).

6. The device according to claim 1, characterized in that the diameter of the half-grooves (75) of the welding jaws (73, 74) are smaller than the outer diameter of the Ventil¬ body (70).

7. The device according to claim 1, characterized in that both the valve body (7, 93) and the inner wall of the bag (4, 58) are made of polypropylene.

8. The device according to claim 1, characterized in that the bag (4, 58) is folded accordionally in its longitudinal axis, that paper rings (79, 80) are provided and that the paper quality of the rings (79, 80) is selected such that tear them into the bag (4, 58) when filling the product.