DE10009622B4 - Device for storing and dispensing a flowable substance and its use - Google Patents

Abstract

Contraption, comprising a first. and a second foil (2, 3), at least form a first chamber (4) for receiving a first substance, wherein the foils except for the at least one first chamber (4) planar area connected to each other, and a film tab (14), which with the first chamber (4) via a selectively openable Passage area (6) is connected and has a dimension, which is a mixing located in the at least one chamber (4) Substance allows, if they leave the at least one chamber (4) over the selectively openable one Passage area (6) has been applied to the film tabs (14) is, the surface being of the film flap (14) is greater as the area, which has the device without a film tab.

Description

The The invention relates to a device for storing and deploying a flowable substance, in particular from the dental field, comprising a first and a second foil, forming at least a first chamber for receiving a first substance, and a foil flap which communicates with the first chamber via a selectively open Passage area is connected and their use.

Especially In the dental field, for example, filling materials are predominantly in containers with screw cap. To make matters worse, many of the required substances and are sensitive to air and / or before using them first with at least one further substance, for example catalysts, must be mixed. Before applying the desired. Materials are therefore usually two containers to open, i. screwed, take the substances and then on a mixing block, for example to mix with a spatula. By repeatedly screwing on the Storage containers are the substances inevitably become increasingly polluted or in their properties negatively affected. Furthermore, it is to be mixed a mixing block and a spatula necessary. Likewise is an exact one Dosage of paste strands necessary, to comply with the required mixing ratio.

In WO-96/03326 A1, for example, describes a container for single use, the hollows for storing a drug and an applicator having. Both hollows are protected from contamination by a peelable cover sheet protected. In one embodiment will push the drug through on the drug containing trough containing the applicator Mulde transferred to to wet the applicator. It is stated that this is only possible if the cover sheet in the transition area the two hollows with the container not glued.

In US 3,835,834 discloses a care set that has two wells in a body that contain on the one hand a care substance and on the other hand a swab: By a sealing foil containing the care substance and the swab main body is protected from contamination.

Out DE 3 717 512 A1 a three-chamber film container is known in which two of the chambers are superposed and contain two liquids to be mixed together, while the third adjacent chamber serves as a mixing chamber.

US 5,240,41 A describes a device for storing and mixing a liquid and a powder. For this purpose, a cover sheet is removed from the device. In a first. Deepening of the device, the liquid is housed in a separate container, which is removed for opening from the device. After opening the container, the liquid is dropped into a second well of the device in which a powder is: The mixing of the two substances takes place in the second well with the aid of a spatula.

US 5,660,273 A relates to a device for storing and mixing two substances, which are stored in two wells of the device and are separated from each other by a mixing region.

Out EP 0 895 943 A2 a device for storing and applying a flowable substance is known, comprising a container of two films, which are connected to form a chamber for receiving the substance and a separate chamber from the pocket for removal of the substance, wherein the separation between the chamber and the bag has a selectively open passage area.

adversely This device is only conditionally viscous Materials are suitable and intensive mixing of several, for example pasty substances, only badly possible is.

consequently It is an object of the present invention to provide a device to provide, which avoids the aforementioned problems, and whose Use in particular a device for storage and deployment of substances that require intensive mixing of in allows the device stored substances, wherein the to be mixed Substances applied in a simple manner and possibly other substances can be mixed should and use for specify this device.

These The object is achieved by a device as described in the claims are.

The invention has the following advantages:
The device is suitable both for storage and for mixing substances.

Furthermore, it is ensured that all substances stored in the device have the same filling date before the mixing process, so that incompatibilities of the substances due to different expiration times excluded you can.

ensured is also the maintenance of a reproducible setting after mixing the applied substances.

at Use of different batches of substances to be mixed, especially in 2-component systems, may otherwise be an undesirable change can not be excluded in the setting time.

Of further can be ensured by appropriate material selection be that the foil flap, which is used for mixing in the Device located substances, not of the substances is attacked.

Finally is ensured that in the device, the substance or the Substances are only in the required amount, creating a Loss of material due to excessive mixing of the material is avoided.

Of the Foil flap is flexible and has a dimension, the mixing of the substances possibly present in the chamber allows. The surface of the film tab provided for mixing is larger than the Area, which has the device without a film tab.

Possibly contains the first chamber at least one further container, preferably in pillow form.

The Presence of a separate container for holding a Substance prevents the substance in the storage condition immediately neither with the selectively openable Passage area still in contact with the film forming the chamber comes.

Thereby will be a damage the device, in particular of the film forming the device difficult. this makes possible an extension of the Storage time of the device containing the substance.

in this connection The use of the diffusion of volatile substances has a strong impact or preventing materials for the manufacture of the container proved to be advantageous.

Depending on Material for the container In this way even aggressive substances can be handled easily store and handle, without depending on advantageous properties of commonly used films that the container to have to give up. The term aggressive substances includes both corrosive (acidic and basic Substances) as well as sticky substances; as well as solvents with plastic solubilizing Properties.

By the device according to the invention is also a safe storage of radiation sensitive in particular Substances possible. External radiation must now after the container forming film an additional Overcome the barrier, before the radiation can hit the substance. Under radiation is any form more natural occurring as well as artificially to understand generated radiation. This includes, on the one hand, electromagnetic Radiation, in particular in the range of 380 to 520 nm and on the other Corpuscular radiation, in particular beta radiation.

Advantageous can also be if one of the films, preferably the film, the is not deep drawn, having a peelable outer layer region.

The Presence of a peelable outer layer area allows first simple, at least partial removal of a film part. Thereby is optionally one which optionally one or more substances containing chamber visible.

The Using different types of films for the outer layer area on the one hand and on the other hand, the films forming the chamber allow pre-use the device safe storage of substances.

Furthermore the substances to be mixed remain in the stored state against external influences such as Light incidence or unwanted pressure load better protected.

is one of the films forming the chambers translucent, can after Peeling off the peelable outer layer area the mixing process and / or emptying the chamber, for example be followed optically. This results in a more homogeneous mixing result and a more complete one Empty the chamber into the bag.

ever After substance to be applied, the inner layer of the film, which comes into contact with the substance to be administered to the Properties of the substance to be adjusted. This allows the use the device for storage for a variety of different in their reactivity substances, without the overall process of making the device must be converted.

The Invention allows thus a safe and contamination-protected storage and application of for example dental material.

Of the peelable outer layer area can also be applied only on the film tab.

These embodiment is particularly advantageous if it is to be ensured that the foil flaps, which should be used for mixing before mixing is not contaminated, for example by dust deposits or moisture.

to it has become easier to peel off the peelable outer layer area as cheap proved, if this film section at one point not with the inner layer area intimately, for example by a lamination, connected is. This can be done, for example, by designing this Section can be achieved in the form of a tab.

The The first and second films are optionally multilayer films. she have an optionally peelable outer layer region and a Inner layer area on.

When Films are preferably used those that have a sufficient Have diffusion tightness.

ever according to the nature of the substance to be stored, the films should also resistant against aggressive, for example corrosive and / or solvent properties be exhibiting substances.

The Film components can chosen be made of plastic, metal and ceramic films.

When Plastic films are conceivable, for example: PE, PP, PTFE, PET, PA, PBT, PVC, EVA, PVF (polyvinyl fluoride).

When Metal foils are conceivable, for example: Al, Sn, Au, Ag, Fe.

Under Ceramic films are to be understood as films, for example have a SiOx-containing layer.

Of the Foil construction is basically arbitrary and oriented to the nature of the stored Substances.

When Advantageously, a film structure with the sequence from the outside to inside PET, Al, PET, PE or PP, Al, PET, PE, if necessary also without PET film as a middle film.

Between the slides can also adhesive additions are located.

When adhesive additions conceivable: laminating adhesive or extrusion laminating media.

Of the optionally peelable outer layer area one of the two films is preferably opaque.

Of the Inner layer region of the first film preferably translucent and possibly more flexible than the outer layer area.

When advantageous for has the outer layer area a film layering from outside to inside in the sequence PET, Al, or PP, Al proved.

The Device comprises a first film, for example in the form of a Cover film and a second film, for example in the form of a thermoforming film, as with conventional Blister packaging is used. To a more complete Emptying the device can also be beneficial be, if neither of the two films is deep drawn.

The Films are preferred except for the regions forming the chambers flat connected with each other.

The Connection of the first with the second film can, for example by heat sealing, Cold sealing, gluing or ultrasonic welding with sonotrodes.

One Multilayer construction of the first and second films can be achieved by lamination, Calendering, laminating different Monofolienlagen optionally can also be achieved by vapor deposition, for example with metals.

Around the introduced into the device, administered substances For example, to protect against light, the films are preferably designed so that they are in an area surrounding the chamber by two spaced sealing seams with each other are connected.

The or the possibly existing containers can be with the produce the same process for the preparation of the device can be applied. The container is preferably by welding, gluing or sealing in the edge area of plastic or produced metal-containing films, so preferably a pillow-shaped structure arises. The connection of the films is such that the container open by the action of external pressure, the container preferably burst undisturbed when pressure is applied.

The Form of the device is basically arbitrary, but preferably to the nature of the stored substances customized.

The Chamber or chambers are preferably round (circular or oval) but possibly also square (square, rectangular or triangular) educated.

The The chamber or the chambers have their intended purpose Volume up so that when used properly and several to be mixed components carried out a homogeneous mixing can.

A For example, chamber has a diameter or dimensions of 5 to 30 mm, the dispensing instrument a shaft diameter from 2 to 8 mm. The administered substance volume is usually ranging from a few tenths of a milliliter to about 10 milliliters, preferably in the range of 0.03 to 5 ml.

The If applicable, the bag is open to one side and optionally designed to be a dispensing instrument and / or a mixing instrument, for example in the form of a spatula, too in the warehouse state can accommodate. The spreading or mixing instrument can simultaneously serve to apply the mixed material.

The Separation between the chamber or chambers and the pocket is relative to the Distance as well as regarding the strength of the adhesion designed so that it is a breaking point can form.

Of the Passage area is designed so that he in the storage condition a dense closure, both to the film tab out as well to the possibly existing second chamber.

A such predetermined breaking point leaves For example, by cold sealing, heat sealing, ultrasonic welding or Bonding, whereby when heat-sealing a compared to the other sealing areas different energy input, preferably lower energy input takes place. This can be over temperature, pressure and / or Holding period are regulated.

A different possibility consists in the area of the predetermined breaking point between the first and the second film adhesion reducing foreign particles such as Peelfolienstranglinge or hotmelt adhesive points to bring. In this Fall are preferably as upper and lower film festveriegelnde Sheets used.

The possibly existing application instrument and / or mixing instrument is preferably spatula, spoon or brush-shaped designed. Furthermore, can Pipettes, cotton swabs or sponges be used as an application instrument.

Further it is favorable when using a dispensing instrument when the bag through the application instrument is sealed to the outside.

The Device is preferably used for storing and dispensing substances, especially of small quantities, as for example in the dental field be handled.

Prefers the device is suitable for storing aggressive and / or light-sensitive substances and substances after application with another substance to be mixed. These further or further substances are located preferably in a second or further chamber, optionally in a separate, preferably pillow-shaped container. This can turn be surrounded by a second substance in the chamber.

To the Use becomes first the possibly existing outer layer region at least partially pulled off to prepare the film cloth for mixing.

Further the two foils are in the range of selectively openable Passage area to be separated, making a connection between the chamber and the film tab is produced.

Also It is required that the substance or substances contain it possibly existing containers open become.

Preferably this is done by external pressure on the chamber, for example, between the thumb and forefinger of the User or by pressure, over the possibly present in the device instrument is exercised.

This can be achieved, for example, by using the instrument over the Foil and the chamber away in the direction of the film tab with a Spatulate the substance in the chamber onto the foil flap is stripped. This bursts the container (s) containing the substance on. It is advantageous to hold the container to a retaining tab, to prevent slippage in Ausstreifrichtung.

If the device has a first and a second chamber, which via a selectively open Passage area can be interconnected, the substances preferably in reverse order of their arrangement in the direction Striped foil flaps.

It is also conceivable, however, an arrangement in which two chambers via selectively openable passage areas in the possibly existing Ta or directly on the foil flaps.

If Several substances are stored in the device and to a later Time to be mixed, has a certain arrangement the chambers containing the substances proved favorable.

A first substance that is present in a smaller amount, for example a catalyst is preferably in a first chamber, the one with the foil flap or the optional bag directly above a selectively openable Passage area is connected. A second substance, often in larger quantities is present, is preferably in a second chamber, via a selectively open Passage area with the first substance-containing chamber connected is.

On This way you can be sure that the first substance when stripping the second substance, which takes place via the first chamber, Completely is applied to the film cloth to anschießend a to achieve optimum mixing.

If the inner layer region of the first film is translucent is, lets the emptying from chamber to chamber or in the pocket on the Visually follow film tabs.

Possibly the film tab also has one or more retaining tabs on, which facilitate the mixing.

The Substances can flowable or if necessary be kneadable. Preferably, they are polymerizable. Optionally, they have a pasty, spreadable consistency on.

Examples for polymerizable Substances include light or free radical polymerizable substances like acrylic acid, methacrylic acid, maleic acid, in both monomeric and polymeric or prepolymerized Shape.

Flowable substances include all common in the dental field liquids and gels, such as etchants, Primer and bonding agent and usual Solvent.

The solvents can chosen be from both dipolar protic and dipolar aprotic Solvents. Examples include: acetone, DMF, DMSO, alcohols, water.

All common in the dental field restorative and / or prosthetic substances such as composite, compomers, Ormocers, glass ionomer cements or other polyelectrolyte cements, Silicate cements, phosphate cements, for example in pastes or else in powder form filled in the device become.

The Substances are preferably in the container (s), where appropriate in the container (s) and at the same time in the container (s) containing chamber.

figure description

1 Top view of the device with a spatula, two chambers and a pull-tab.

2 Sectional drawing with two successively arranged chambers with spatula and a further container.

The Embodiments shown in the figures can be randomly combined.

1 shows the device according to the invention in plan view with a first film ( 2 ) and a second foil ( 3 ), the two chambers ( 4 . 5 ), a pocket ( 7 ), a foil flap ( 14 ) and a retaining tab ( 15 ) for stripping. The two chambers ( 4 . 5 ) and the optional bag ( 7 ) with the application instrument ( 8th ) are interconnected via selectively openable passageways ( 6 ) connected. The foil flap ( 14 ) further comprises a tab-shaped area ( 16 ), which is intended to facilitate the removal of an optionally existing outer layer region and can serve to hold the foil flap during mixing.

2 shows a section through a device with two consecutively arranged chambers ( 4 . 5 ) and a bag ( 7 ), in which an application instrument ( 8th ) is located. The chambers and the pocket are interconnected via selectively open passageways (FIG. 6 ) connected.

For reasons of clarity, the foil flap ( 14 ) only hinted at. Furthermore, in the chamber ( 5 ) a container optionally filled with a substance ( 9 ). This arrangement of the chambers lying one behind the other is particularly advantageous if it is to be ensured that the substance which is in the first chamber can be applied to the film flaps almost without residue when the other substance, which is located in the second chamber, stretches.

Claims (11)

Device comprising a first. and a second film ( 2 . 3 ), the at least one first chamber ( 4 form) for receiving a first substance, wherein the films with the exception of the at least one first chamber ( 4 ) forming area are connected to each other flat, and a foil flap ( 14 ), with the first chamber ( 4 ) via a selectively open passageway ( 6 ) and has a dimension which is a mixing of in the at least one chamber ( 4 ) substance when it leaves the at least one chamber ( 4 ) over the selectively openable passageway ( 6 ) on the film tabs ( 14 ) has been applied, wherein the surface of the film flap ( 14 ) is larger than the area which the device has without foil flaps. Device according to claim 1, comprising a second chamber ( 5 ) for receiving a second substance. Device according to one of the preceding claims, comprising a bag ( 7 ) for receiving an instrument ( 8th ) having. Device according to one of the preceding claims, wherein the separation between the second chamber ( 5 ) and the first chamber ( 4 ) and / or the bag ( 7 ) a passage area to be selectively opened ( 6 ) having. Device according to one of the preceding claims, wherein in the bag ( 7 ) an instrument ( 8th ) having one of this protruding portion. Device according to one of the preceding claims, wherein the instrument ( 8th ) has the shape of a spatula, a spoon, or a brush. Device according to one of the preceding claims, wherein in the chamber (s) ( 4 . 5 ) At least one other container is located. Device according to one of the preceding claims, wherein in the chamber (s), and / or, where applicable, in the at least one another container, at least one substance is located. Device according to one of the preceding claims, wherein one of the films, a peelable outer layer region ( 13 ) and an inner layer region. Device according to one of the preceding claims, wherein the peelable outer layer region ( 13 ) is non-translucent and the inner layer region of the first film is translucent. Use of the device according to one of the preceding claims for storage and application of at least one flowable and / or spreadable Substance.