DE2157492A1 - COMPRESSIBLE FILM CAPSULE - Google Patents

Description

Compressible foil capsule (addendum to patent ............... patent application P 20 24 402.4-35)) Subject matter of the patent ......... (patent application P 20 24 402.4-35) is a compressible follicle capsule with at least two, through at least one common intermediate subdivided chambers for separate storage of for Mixing certain substances for dental purposes, especially heat-sensitive and / or volatile substances, at least one of which is flowable, wherein the outer and intermediate walls of the cup-shaped or lens-shaped, one above the other Chambers made of a metal or a metal-plastic film and at the edges connected to one another on the metal side by cold welding or ultrasound are, un1 where the partition walls and an outer wall each have at least one predetermined breaking point exhibit.

This foil capsule enables a completely liquid- and gas-tight Inclusion of flowable substances, especially heat-sensitive substances or substances attack the plastic rolls.

Attempts have now been made to compress the film capsule Reduce the required pressure in order to exclude with certainty that the capsule tears on the cattle bonded by cold welding or ultrasound.

A decrease in the thickness of the film, the application of lower pressure would allow a weakening of the weld edges, so that this path was not unlimited. A decrease in the foil atark caused but also at the same time the reduction of the wall thickness at the predetermined breaking points. This is also not possible without restrictions, since the breakpoints have a certain Strong must have to avoid accidental tearing during oil handling and to avoid when shipping. Furthermore, with some liquids, Z. Bo has a certain for the evaluation of monomers used catalyst solutions, it was found that These liquids corrode aluminum foils, with pitting-like appearances occurred. The weld edges and the predetermined breaking points are particularly affected by this, because these parts are cold machined and thus in terms of stress corrosion corrosive liquids are particularly sensitive.

So the final task was to compress the sum to reduce the compressive force required by the polishing capsule without simultaneously increasing the thickness of the film at the predetermined breaking point and thus lower the strength of the edge weld. This task is now carried out in a further development of the film capsule according to patent .... (patent application P 20 24 402.4-35) according to the invention daduroh solved that the hood wall, which no 8011 break point, and possibly also the intermediate winch at least one The joint is essentially vertical to the printing direction.

With this arrangement can be used to compress the foil capa required pressure, which for the foil capsule according to the main patent is about 25 - 30 kg / cm2 was about 30 to 40 - decrease. The fold can be a Form a closed ring or a spiral0 According to an advantageous embodiment of the invention, the outer wall and optionally also the partition walls in Form of a cylindrical or frustoconical bellows. Compared to a dome-shaped design, it has a particular cylindrical shape the advantage that a better use of space is achieved with the same footprint, d. H. a larger volume of liquid can be accommodated in the chamber. In the cylindrical design, a bellows is particularly advantageous because Without the bellows, the pressure required to compress the capsule is higher would be than with a dome-shaped design of the chamber.

The folds, which preferably form a bellows, can also be provided in the boundary wall of the second chamber. The size ratio the chambers can vary within wide limits, so that the ones to be mixed are punched out for example in any ratio between about 1 s 10 and 1 t 1 can.

The use of folds to make it easier to compress the foil capsule is particularly useful for larger foil capsules, e.g. B. Polienkapseln with a total content greater than about 200 mg, i.e. H. up to a few grams (e.g. Bo for the production of a prosthesis or other dental prosthesis), as for these capsules require a film wall thickness of more than 100 microns.

EB was found that the film capsule gene of the invention also at relatively low pressures except for a negligible compresses small volume, d. H. so it is formed at the folds after pressing, no dead spaces, there are still residues of the flowable substances contain.

As already mentioned above, the edge welding is allowed when compressing the polypropylene capsule does not tear. On the other hand, the film thickness may be at the predetermined breaking point not be too low 0 This danger does not apply to corrosive liquids can be completely ruled out, which is why the invention continues to propose in at least one the chambers to provide a closed bag made of Kunatstoffolee, or the Inner walls of this chamber up to the edges to be verachweißenden with plastic film to be coated or provided with a plastic coating. The metal foil can for example with plastic varnish in the form of circular, square or polygonal surfaces (tuprene) can be printed. As Kunstatoffe z. Bo Polyester or polyethylene are used0 This makes it possible to use a Occurring corrosion of the aluminum foil, in particular a weakening of the predetermined breaking points and the edge welds as a result of direct contact with the substance in question to avoid, the vapor of the substance can penetrate through the plastic film and come into contact with the metal in this form. It will be one very soon though Enter vapor pressure equilibrium in the sub-chamber, so that the concentration of corrosive substance remains relatively low.

The plastic film bag is expediently through the edges the metal foils are clamped so that there is no compression of the foil capsule slides into the medicine chamber. But there is still enough space provided so that the metal foils can be cold welded together. The foil bag is generally made in such a way that initially a small plastic film Schalg is formed, which is filled with liquid. Then w: .rd a cover disk and the edges are sealed together.

Instead of the separately produced foil pouch, such as mentioned above, a deep-drawing foil and a cover foil made of metal are also used coated with a plastic film or provided with a plastic varnish are. The deep-drawing film is then deep-drawn to form a shell which, if necessary is provided with folds. On the cattle of the shell or cylinder thus formed how the plastic coating, if it is continuous, removed, likewise also for the cover film, so cold welding or U1 ultrasonic welding can be done on the metal surfaces of the edge0 In the case of the in the form of separate surfaces applied paint or printing, this step is of course not necessary, Further inside, the plastic films are on top of each other and can then be in front of the Cold welding of the cattle has been heat sealed so that in this successive At the same time, the liquid is sealed in the plastic coating he follows. rather than by heat sealing, which is usually done at around 110 to 120 ° C the connection of the square or polygonal plastic surfaces can also by ultrasound, i.e. at normal temperature. In the event of a Delamination would indeed form a foil pouch in the chamber obtained, However, there is a tight seal to the outside due to the cold welding of the metal foil edges guaranteed.

It was found that both when using a Polienbagchene as well as when using metal foils coated or printed with plastic the same result is achieved as the metal only works with the vapor of the liquid corxmt in contact and corrosion due to pitting does not occur. The great Advantage of the practically unlimited shelf life and tightness of the foil capa is retained because the edges are cold-welded steam-tight on their metal surfaces will be0 Among the heat-sensitive and / or volatile substances for dental purposes, as already stated in the main patent, substances are used, which have a relatively high vapor pressure even at normal temperatures, z. Bo organic solvents, liquid polymerizable monomers used as Dsntalpraparate for example used for the production of plastic fillings, crowns or inlays are (z. Bo acrylates and methacrylates), catalysts, etc. The catalysts are generally in solutions, e.g. in alcoholic solutions. The embodiment the film capsule according to the invention, in which in one of the chambers a sealed Bag made of plastic film is arranged or in which the inner walls of this Chamber coated with a plastic film is for the storage of aggressive corrosive catalyst solutions are particularly suitable.

Also other liquid substances that do not have a high vapor pressure but which attack plastic films or the weld seams between plastic films, can be enclosed in the foil cap. pay for this, for example essential oils, such as eugenol, clove oil or frequently used in dental preparations Bergamot oil. Since these substances are not corrosive, it is not necessary to seal them in a plastic bag beforehand.

In addition to liquid substances, subatanses are capable of flowing also those substances that are pasty or highly viscous at room temperature or are firm. The former include, for example, mixtures of monomers and polymers or copolymers, e.g. 3. of acrylic or methacrylic acid esters. Pay for this too certain monomeric acrylates or methacrylates, especially dimethacrylates with a Melting point of about 4t) to 450C. with these substances it is useful to use the Warm up the foil capsule a little before squeezing it out, in order to liquefy these substances.

As a material for the outer and partition walls is particularly suitable Alusinius or copper foil, which has a strength of about 50-150 µ, preferably in a thickness of about 70-100 µ can be used. It could also be higher Foil thicknesses are used because the compression of the foil capsule by the Folds is made much easier. The strength of the folds Walls can be about 3 to 6 times the thickness of the predetermined breaking point or breaking points be.

If aluminum foil is used, the should be welded on by cold welding produced weld seams preferably a bare and an oxidized aluminum surface or two oxidized aluminum surfaces lie on top of one another. The oxidation of the aluminum surface preferably takes place anodically, a Vorgarg, which is also referred to as "anodizing" will.

During cold welding, the metal bodies flow into one another, wherefore an absolutely vapor-tight and practically indefinitely durable connection is created. The mechanical durability of the connection can be increased by the fact that the weld seam produced by cold welding is provided with a flange.

It is possible for the individual, through a common partition wall to design separate chambers of the same size, d. H.

two cylindrical chambers of the same size can lie on top of one another and be separated by an intermediate film.

Preferably, however, one chamber is partially different from the other chamber included0 Here is the predetermined breaking point or are the predetermined breaking points the intermediate wall of the predetermined breaking point or the predetermined breaking points of the outer wall or opposite the outer walls. The predetermined breaking points of the partition walls have a maximum Distance between each other and to the predetermined breaking points in the outer wall. This will when the foil capsule is pressed together, a smooth flow of the free-flowing jubatanzen achieved. I. in rinsing effect can be achieved thereby that the chamber, the outer wall of which has no predetermined breaking point, a low-viscosity liquid contains that when the film capsule is pressed together as a rinsing liquid for the in the or the other chambers contained tenen flowable, z. B. pasty or even powdery substance (s) acts.

The Kaaimer, the outer wall of which has no predetermined breaking point, can be contain a liquid, polymerizable Mono @, while the chamber, its outer wall has one or more predetermined breaking points, one acting on the monomer or contains reacting substance. This includes, for example, catalysts, the solution or suspension may be present, e.g. B. peroxide catalysts. The outside wall or the outer walls of the film capsule are preferably designed so that they a Profile on @ -sen that matches the profile of that surface.

after the capsule has been compressed against the corresponding outer wall rests, so that the walls of the foil capsule after compression practically without Gaps lying on top of, d. H. the volume of the chambers has become practically zero The film capsules according to the invention are generally produced as follows: In a metal foil that is coated on one or both sides with plastic or can be printed, e.g. in an aluminum or copper foil, with deep-drawing quality and a thickness of about 50-150 / u, preferably 70-100, is made by deep drawing a recess, e.g. B. in the form of a hemispherical dome or preferably a recess is made with a cylindrical or frustoconical cross-section It is preferable to place it on a film strip that is about 20-120 mm, and a lung of about 100 - 200 1 can have, several wells at intervals boron. On a 120 mm wide band z. B. side by side three Wells with a diameter of 40 mm each or 6 wells with a diameter of 20 mm each. The indentation is continuous on the inside Coated with plastic, the plastic is attached to the cattle by cold welding to be connected is removed. It is not necessary to remove the plastic, if the metal foil is partially printed with plastic varnish. Then the Grooves pressed into the sides of the depressions. Pressing in the grooves can of course also at the same time as deep drawing when using an appropriate tool take place. The first flowable substance is now placed in the depression or depressions, z. B. a polymerizable monomer, measured what z. B. with a pipette or Micropipette can be done. In a second Xetall foil or a foil tape, which can also be coated with plastic on one or both sides, one (or more), somewhat shallower indentations are now made by deep drawing, whereupon in the recess or recesses, preferably at the lowest point, predetermined breaking points be attached. These predetermined breaking points can be in the shape of a three-quarter circle or a star or any other Porm. In the case of continuous With plastic-coated foils, the plastic is now back on the cattle removed; this is not necessary for plastic that is applied in the form of speckles. Then the second th well is placed on top of the first, using a Foil tape with several wells the second wells the same distances like the first ones. Then in the second recess or in the recesses measured or measured a second flowable substance

it becomes a small polybag in which the second substance which can flow sealed in, placed in the recess, as a second flowable substance z. B. an activator, catalyst or accelerator solution, such as those used for polymerization of plastic is common.

The second recess can also be similar to the first recess in The shape of a cylinder or truncated cone can be formed, and the cross winds can be provided with folds similar to the first recess.

Then a third metal foil with a predetermined breaking point is which can optionally be coated with plastic on one or both sides, placed over the second depression or the depressions of the second film strip, wherein in the case of a film coated on both sides, the plastic at the edges beforehand is removed when the coating is continuous, then the plastic coating or -printing is heat-sealed or connected by ultrasound at normal temperature. The metal foils are then placed on the edges, i.e. H. at the free netal surfaces , several thousand kg / cm²) or with ultrasound by means of Kaltechwelßen under pressure. A profile can be embossed in the third film or the third film strip, which corresponds to the profile of the support surface on which the finished film capsule lies. Instead of the third film or the third poly tape, the one in the finished capsule Form an outer wall, a third can be even more shallower depressions placed on the second wells and thus rechecked in the manner described above so that after the cover film has been applied, capsules with more than two chambers can be obtained.

The foil capsules produced using a foil tape hang after the cover film has been applied, they are still together and can be punched out of the tapes will.

It is still possible, at first, with a flowable substance filled depression which can have one or more folds, a flat, to lay with a predetermined breaking point, this at the edges with the Joining cattle of the first depression and then after turning around 1800 in a mirror-inverted arrangement a second substance with a second flowable substance filled recess with a predetermined breaking point on the other side to apply the flat film and thus. to be welded at the edge.

During the welding process, particular care must be taken to ensure that the welding surfaces are absolutely clean and free of grease be contaminated. The dancing out of parts of the polypropylene capsules can be made to any desired Point in time, d. H. not just at the beginning or at the end.

A film capsule produced in this way can then choose between suitable Profile surfaces can be pressed out practically quantitatively.

The invention is illustrated by the attached drawing. It means: FIG. 1 shows a section through an embodiment of the film capsule according to the invention; FIG. 2 shows a section through another embodiment of the film capsule according to FIG Invention; Figure 3 is a side view of a further embodiment of the Follenkaprel according to the invention; FIGS. 4-6 sections through further embodiments of the film capsule according to the invention; Figures 7 and 8 show the arrangement of a film capsule of the invention in a mixing container before or after compression; Figures 9 and 10 show the arrangement a foil capsule according to the invention in another mixing container in front of or

after squeezing.

In Figure 1, the first outer wall of the film capsule is drawn, Ste has the shape of a hemispherical dome. The outer wall 1 is at the edge 2 with the intermediate wall 3 formed in the form of a shallow trough by cold welding Connected in a gas-tight and liquid-tight manner and forms a first with the intermediate wall 3 Chamber 4 filled with a flowable substance, e.g. B. a monomeric acrylate or Methacrylate is filled. Approximately in the middle of the partition 5 there is one The predetermined breaking point which is indicated by the number 5 and which, for example, has the shape of a three-quarter circle may have, The second outer wall 6 is at the edge 2 with the intermediate wall 3 connected gas- and liquid-tight by cold welding and forms with this a second chamber 7, for example with a catalyst or accelerator solution is filled. At the point indicated by 8, the second outer wall 6 has a Predetermined breaking point, which can also have the shape of a three-quarter circle.

The outer wall 1 is embossed with folds in the form of parallel Grooves 9 provided. In the embodiment according to Figure 2, the outer wall 1 is in Porm A truncated cone formed laterally are all folds 9 in the form of annular grooves provided. The partition 3 is also frustoconical and provided on the sides with annular grooves 9 ″. Those facing the outer wall 1 Side of the partition 3 carries a predetermined breaking point 5, as in the embodiment according to FIG. 1. The second outer wall 6, which also has a predetermined breaking point 8 is provided, corresponds essentially to the corresponding outer wall of Figure 5.

The welding edge 2 is also as in the embodiment of FIG 1 designed.

The embodiment according to FIG. 3 corresponds essentially to the embodiment from Figure 1, with the difference that the grooves 9 are arranged in a spiral.

Figure 4 shows an embodiment in which the outer wall 1 has the shape of a cylinder. The folds 9 continue as in the Ausfithrungsform Figure 1 in the form of annular grooves around the cylinder surfaces. The other elements also correspond to those of the embodiment of FIG.

The embodiment of FIG. 5 corresponds in its lower part to FIG Embodiment of FIG. 4. The partition wall provided with a predetermined breaking point 5 However, 3 represents one flat film on which the cylindrical auegeblldete and provided with the grooves 9 and the predetermined breaking point 8 outer wall 6 is placed on the edge 2.

The embodiment according to FIG. 6 corresponds essentially to the embodiment according to Figure 4; however, it contains in that by the intermediate wall 3 and the outer wall 6, a second chamber 7 formed with a liquid-filled foil pouch 10. The foil bag 10 lies loosely in the chamber 7. Instead of the loose foil bag the partition 3 and the outer wall 6 can be on the side facing the chamber 7 be coated with plastic. The plastic coating only extends up to close to the edge. 2, so that the free metal surfaces lie on top of one another at the edge.

The importance of the profile surfaces of the outer walls 1 and 6 of the foil capsules according to FIGS. 1, e, 4 and 6 can be seen from FIGS. 7 and 8.

FIG. 7 shows the arrangement of a follicle capsule (such as a foil capsule according to Figure 4; in principle the same applies to the other embodiments) in a mixing container for the production of ready-to-use dental preparations. the Pay numbers 1 - 9 have the same meaning as in Figures 1 - 6. The mixing container consists of a mixing zone or chamber 11, which contains a powdery substance 12, e.g. / a Acrylic or methacrylic perpolymer contains * a second chamber 13 that passes through a movable cap 14 is limited, and one provided with an opening 15a Separation 15.

The foil cap is located in the chamber 13 * and that is yours Edge 2 between the cap 14 and the partition 15.

trapped. The partition 15 provides a solid support surface for represents the outer wall 6 of the film capsule, and its profile is the profile of the outer wall 6 adjusted so that there is no longer any space left. In appropriate way is you Innnwandprofil the cap 14 the profile of the outer wall 1 of the film capsule adjusted. Is now pressed on the cap 14, or the cap 14, if it If it is a screw cap, if it is screwed down, the outer wall will tear first 6 at the Sollbruohstelle 8, and the substance in A * r chamber 7 is through the opening 15a injected into the machine chamber 11.

When you continue to press the cap 14, the partition 3 tears on the Predetermined breaking point 5, and the. liquid substance in the chamber 4 is through the opening 15a injected into the mixing chamber.

In doing so, it washes the chamber 7 free of residues of the first substance. If the cap is pushed all the way down, as shown in Figure 8, then lie the outer walls 1 and 6 and the intermediate wall 3 without gaps on each other, there the profiles of the inner wall of the cap 14 and the partition 15 also match The chambers 4 and 7 are thus practically completely emptied.

When using mixing capsules in which the outer walls 1 and / or 6 have a cylindrical shape, such that the bottom surfaces are parallel to each other run (cf. in particular Fig. 6) are the inner wall profile of the cap 14 and the profile of the outer wall 1 80 designed so that parallel pressure surfaces are formed, so that in this case too, the mixing capsule is practically completely emptied is possible. Figures g and 10 show the arrangement of such a misoh capsule in a mixing container. This mixing container differs from that in the figures 7 and 8 shown mixing container also in that the perforated partition 15 is extended downwards and forms the greater part of the mixing chamber. The one with 11 designated smaller part of the mixing chamber fulfills the function of a removable Closure or lid.

The milk container is in an automatic Schwingmischvorrich device (a so-called amalgam mixer) clamped. This will vibrate for a few seconds offset, whereupon the finished Gemisoh by pulling off the mixing chamber (or the smaller Part of the mixing chamber) 11 from the cap 14, which is the compressed film capsule and the perforated partition 15 contains, from the mixing chamber 11 (or from the after perforated partition 15) extended at the bottom

Claims (5)

A n p r u c e 1. Compressible foil capsule with at least two chambers divided by at least one common partition to separate Storage of substances intended to be mixed for dental purposes, in particular of heat-sensitive and / or flat substances, of which at least one is flowable, the outer and intermediate walls of the @ apflinsen-shaped, stand on top of each other made of a metal or a metal-plastic film and at the edges by cold welding @@@ with ultrasound on the metal side @ are bound, and wherein the partition walls and an outer wall each at least have a predetermined breaking point, according to patent ......... (patent application P 20 24 402.4-35), thereby g e k e n n n z e i c h n that the outer wall (1) does not have a predetermined breaking point contains, and possibly also the partitions (@ at least one fold (9) are essentially wrong to the printing direction. 2. Foil capsule according to claim 1, characterized in that the fold (9) forms a closed ring or spiral. 3. Foil capsule according to claim 1 or 2, characterized in that the outer wall (1) and optionally also the partition walls (3) in the form of a cylindrical or frustoconical bellows formed a 4. Foil capsule after one or more of claims 1 - 3, characterized in that in at least one the chambers (4, 7) a closed bag (10) made of plastic film is, or the inner walls these chambers bia close to the welded ones Edges (2) are coated with plastic film or printed with plastic varnish 5. Foil capsule according to one or more of claims 1-4, characterized in that that the thickness of the walls (1, 3) provided with folds (9) is about 3 bia 6 -fold the strength of the predetermined breaking point (s) (5, 8).