DE19940705B4 - Lockable glass container with a plastic coating - Google Patents

Abstract

Such closable containers are, for example, glass vials with a tapered neck portion, which can be filled under pressure with a sprayable as aerosol, preferably medically or cosmetically effective substance and a propellant and whose opening can be closed with a metering valve, and a preferably overmolded plastic coating (4) Burst and / or shatter protection, so that in case of damage people are not injured. To increase the internal pressure resistance and the resistance to external pressure as well as the load capacity by a relatively high load in the axial direction of the bottom (3) of the glass container is curved outwardly.

Description

The The invention relates to a closable glass container a plastic coating, the operationally exposed to a relatively high internal pressure, and a shell part with molded outflow opening, the one to the respective shutter type matched Has edge region, and having molded bottom part.

such covered glass containers be especially for also used for cosmetic purposes Purposes or for storing food and drinks application.

A Glass containers containing a substance find particular application here increased Take pressure. Through the plastic coating should be achieved be that glass fragments are held together, if the coated one glass container to break. The plastic coating thus serves as a burst and / or Shatter protection. Such lockable glass containers that are exposed to a relatively high internal pressure, in particular Pressure vessel, those with medically or cosmetically active substances and a Blowing agent can be filled under pressure are and their opening with a delivery member, in particular metering valve, can be closed. In conjunction with a dispensing head which communicates with the delivery member cooperates so that when Pressing both parts against each other, the delivery member is actuated and a certain amount of medically or cosmetically effective Substance exits as aerosol from a spray orifice, these serve Products as applicator for medical applications, in particular in asthmatics and other bronchial disorders, or as an atomizer for perfume or the like.

Such a glass container in the form of a glass vial, which is encapsulated with a plastic jacket, for example, shows the DE 196 32 664 A1 , In the known case, the over-molded glass vial has a pronounced flat bottom with only a little pronounced curvature in the transition from the flat bottom to the vial jacket.

The Internal pressure resistance such glass container, authoritative for the Pressure with which the glass containers safely fillable are, as well as the resistance against external pressure, authoritative for the applicable pressures during application of the plastic coating, and the load capacity by a load in the axial direction, the Example by the user when the application is applied, is therefore limited. For example, generally glass hollow body apply as not in conventional injection molding weiterverarbeitbar, in which a plastic sleeve with a pressure of up to 300 bar and a temperature of up to 270 ° around the glass container, the so-called Glasinlet, being splashed around.

The Formation of the soil of the known Glasinlets follows the standardized Configuration of containers made of tubular glass and shell glass, which has a largely flat bottom, typically with a bottom feed provided have. So that the stability during manufacture, Check, Transporting and processing the glass inlets guaranteed be in the interest of good handling of Glasinlets. Thus, the standard DIN ISO 8362 in Part 1 shows a typical example an injection bottle made of tubular glass with a retracted floor and in part 4 injection bottles made of laminated glass, in Figure 1, a typical example of an injection bottle for insulin with a flat bottom and in Figure 2 an example of an injection bottle for antibiotics with retracted soil.

Also the containers and the accessories for medicines according to DIN ISO 11418, part 1 for dropper bottles, in part 2 for threaded bottles for syrups, in part 3 for Threaded bottles for solid and liquid medicines (veral), in part 4 for Tablet bottles and in Part 5 for pipette, show containers with the typical bottom pull.

Of the Invention is based on the object, a glass vial, which is under pressure with one sprayable as an aerosol Substance and a propellant is filled, which is a shell part with a molded bottom and a molded, tapered Neck part with outflow opening and one opening side molded bead-like end edge for mechanical attachment a delivery member with which the opening of the glass vial lockable is, or a threaded head for has a screw cap, and that of a plastic coating such wrapped is that this also the bead-like end edge or the threaded head or the dispensing organ already applied comprises such that it is high internal pressure resistant and at the same time constant against a high external pressure is, and further in the axial direction with a relatively high load is resilient.

The solution of this problem is achieved according to the invention, characterized in that the soil ge outward and for the bottom curvature radius R, the vial diameter D and the dimension S of the outside curvature, the relationship is: min Max S 1 mm D / 2 R 5 mm D / 2 consists, and that on the bottom side of the plastic coating has a over the entire floor cross-section extending, the vault balancing flat footing.

• 1. Innendruckbeständig bis mindestens 30 bar Innendruck
• 2. Beständig gegen Außendruck von über 200 bar (bis ca. 350 bar)
• 3. Belastbar durch eine Last in axialer Richtung von mindestens 1000 N.

The glass containers according to the invention are characterized by the following properties:

• 1. Internal pressure resistant up to at least 30 bar internal pressure
• 2. Resistant to external pressure of over 200 bar (up to approx. 350 bar)
• 3. Loadable by a load in the axial direction of at least 1000 N.

The high internal pressure resistance allows it, the glass container according to the invention as so-called aerosol containers to fill and use, in particular as an applicator for medical applications or as atomizers for perfume or the like.

Because of The high internal pressure capacity can also be such a container instead of pumping systems by pressurized blowing agent operate. An influx of air to ensure the function of the pumping systems is not necessary. As a result, a product oxidation by atmospheric oxygen can be advantageous be avoided and there are no problems by possibly miteinströmende microorganisms.

The Plastic coating can be done in various ways, for example by dipping in a plastic bath or by spraying a Plastic. With particular advantage, however, the glass container in Wrapped in injection molding ways.

By the training of the invention the glass container protrudes this also the conventional injection molding process, which consists of a thermoplastic Plastic, such as PP, PE, PET, PS, a plastic shell with a pressure of up to 300 bar and a temperature of up to 270 ° C to the glass container is sprayed around.

alternative to the conventional injection molding technology can also be the plastic coating from at least one reactive crosslinking plastic in the way of injection molding applied by the reaction injection molding technique become. In this process, the plastic is at relatively low Injection pressures (below 10 bar) and injected at relatively low mold temperatures, because of the wall thickness the glass container reduced and yet the committee can be reduced.

In addition, the Reactive crosslinking plastics have higher temperatures than those be exposed to the above thermoplastics, so that the overmolded glass container by means of superheated steam can be sterilized in an autoclave. This is just medical Applications essential. Also can already use a dispensing organ closed filled glass container with the plastic coating be provided.

Both Injection molding techniques are known and therefore need not be explained in detail here.

The have glass container according to the invention typically at usual Wall thickness an internal volume of up to 35 ml. There are also glass containers with an internal volume of up to 70 ml produced, but then with a reduced internal pressure load capacity up to about 20 bar, which for certain Applications with low internal pressure is sufficient.

There the invention is closed to glass container is used in the configuration of the glass container and the container opening with in the considerations to involve, i. the necessary execution of the opening edge of the glass container limits the Freedom of interpretation. Typically, the glass containers of the invention have either a screw head or a crimp rim on which a delivery member, a standard valve, is firmly crimped.

A further restriction results from the maximum wall thickness, with the glass container of the invention tubular glass can be produced. If the wall thickness is too large, the necessary Degree of deformation too high; the glass container can then be required Tolerance range can not be established.

in principle is also the glass container made of laminated glass, especially in the IS procedure (Bounce-blow process) produced by injection molding is sheathed.

• – Für die äußere Verpackung besteht eine große Design-Freiheit, d.h. um den Glasbehälter, das Glasinlet, herum kann ein Formteil durch Kunststoff-Spritzguss direkt aufgebracht werden, das nur den Gestaltungszwängen des Spritzgussverfahrens unterliegt.
• – Es besteht die einfache Möglichkeit, den Glasbehälter an das jeweilige Dosiersystem anzupassen.
• – Die Kunststoffummantelung kann mit aromatisierten Kunststoffen (beispielsweise mit Vanille-Geruch) erfolgen.
• – Das Glas-Inlet ist neutral gegenüber den eingefüllten Medien, bspw. werden Aroma- und Geruchsstoffe nicht durch das Verpackungsmaterial verändert, was besonders wichtig für Parfüm, Eau de Toilette, Rasierwasser oder dergleichen ist.
• – Es kann den steigenden Qualitätsanforderungen an Kosmetika und damit den Anforderungen an die Verpackung (z.B. die Forderung nach dem Wegfall von Konservierungsmitteln) Rechnung getragen werden. Der Werkstoff Glas bietet daher für diese Produkte einen optimalen Produktschutz.
• – Der ummantelte Glasbehälter ist durch Standard-Dosiersysteme leicht zu verschließen.

The plastic-coated glass container according to the invention are preferably suitable for the pharmaceutical packaging, but there are also special advantages in the packaging of cosmetic products, such as perfume, Eau de Toilettte, aftershave, etc.,

• - For the outer packaging there is a great freedom of design, ie around the glass container, the Glasinlet, around a molding can be applied directly by plastic injection molding, which is subject to the design constraints of the injection molding process.
• - There is an easy way to adapt the glass container to the respective dosing system.
• - The plastic coating can be done with flavored plastics (for example, with vanilla smell).
• - The glass inlet is neutral to the filled media, for example. Aromas and odors are not changed by the packaging material, which is particularly important for perfume, toilet water, aftershave or the like.
• - It can meet the increasing quality requirements of cosmetics and thus the requirements of the packaging (eg the requirement for the elimination of preservatives). The material glass therefore offers optimum product protection for these products.
• - The coated glass container is easy to close with standard dosing systems.

Also the DE 23 26 584 A the inventive idea can not be deduced. In this document, four examples of a plastic coating on a glass bottle are described, specifically on a bottle of a known beverage manufacturer with a typical configuration having a flat, flat bottom.

Based from in the drawings in partial longitudinal sections illustrated embodiments of the invention with Plastic coated glass container the invention will be closer described.

It demonstrate:

1 a glass container with a completely outwardly curved bottom part and a crimp rim at the outflow opening,

2 a glass container analog 1 but with a central constriction,

3 a glass container analog 1 but with a specially designed head section adapted for crimping metering valves,

4 a glass container analog 1 but with a threaded head instead of the crimp rim,

5 a glass container with a non-rotationally symmetrical cross section, a fully outwardly curved bottom part and a threaded head at the outflow opening, and

6 a glass container with crimp rim analog 1 but with a bottom part that is not fully arched outwards.

The 1 shows in a partial longitudinal section a Glasinlet that can be filled with an aerosol sprayable medically or cosmetically active substance. On the container jacket 1 is an outflow opening with a crimp rim 2 molded, on which a metering valve can be applied. The floor 3 is completely arched outwards.

For the ground radius R, the container diameter D and the dimension S of the outer curvature, the following relationship exists: min Max S 1 mm D / 2 R 5 mm D / 2

On the Glasinlet is by a known method, preferably by the injection molding process, a plastic coating 4 applied in the 1 only partially, on an enlarged scale, is indicated. In the bottom part 3 the coating is applied so that over the glass container cross-section a flat floor surface is formed. In the upper part of the container, the coating extends to the edge 2 the outflow opening, ie closes the crimp rim 2 with a.

Because of the lower mold temperatures in the reaction injection molding process, however, a metering valve can be applied to the crimp rim even before the application of the coating when using this method 2 be placed and only then the coating applied.

The 2 shows a Glasinlet analogous to the glass container 1 with a central constriction 5 is provided. Such Glasinlets are preferably used for cosmetic products, perfumes, Eau de toilettes, aftershave. For the sake of simplicity, is in 2 the plastic wrap 4 of the 1 not shown.

Such glass containers with a central constriction are not on the crimp rim 2 limited; they can also be provided with a differently designed bottle opening.

Preferably apply to the glass container after 2 the dimensions: min Max S 1 mm D / 2 R 5 mm D / 2 L - 20 mm t - 10 mm

The 3 shows a glass container accordingly 1 however, a special head version with a special crimp rim 2 ' has to mount a standard metering valve.

Otherwise, the configuration is the same as the one below 1 , which is underlined by the equality of the reference numbers. The relationship between the outer curvature S, the ground radius R and the diameter D corresponds to that after 1 , Analogous to the illustration in 2 is also in 3 for the sake of simplicity, the plastic coating 4 not shown.

Instead of of a Crimprand the Glasinlets also a glass thread, in particular a DIN standardized Have thread, such as GL 45 K, for a screw cap.

Such an embodiment is in the 4 shown. It shows a glass container accordingly 1 however, a threaded head 2 '' has a screw cap. According to the comments on 3 Incidentally, the configuration of the glass container is the same as that of FIG 1 ,

While the glass containers described so far are rotationally symmetrical with a circular cross section, in 5 a non-rotationally symmetrical glass container with a screw cap 2 '' shown. As the figure part A shows, the cross section in this embodiment is almost square with rounded longitudinal edges.

Also for this glass container, the relationship applies: min Max S 1 mm D / 2

For the rest, the comments on the 1 to 4 corresponding.

In the embodiments of the 1 to 5 is the ground 3 of the glass container arched over the entire cross section to the outside. For applications with lower compressive strength, it is sufficient if the floor is not curved over the entire cross-section. Such an embodiment of the glass container is in the 6 shown.

The floor 3 ' This glass container has a distinctly curved area 3a with a relatively small area flat central part 3b ,

Otherwise, the representation corresponds to the 6 those after 1 ,

Analogous to the cited above DE 196 32 664 A1 can the coat 1 the Glasinlets have hole-like pressure equalization openings.

The glass container can For example, made of borosilicate glass or soda-lime glass.

The Wall thickness of the glass container is determined by the purpose of use, i. in particular the height of the internal pressure in the application, with boundary conditions by the manufacturing process the glass container and the wrapping method of the glass container with a plastic jacket. It is typically of the order of magnitude from 0.75 mm to 2 mm. The thickness of the plastic coating is of the order of magnitude from 1-2 mm.

The Thickness of the coating can over the container height varies be to certain container areas to optimize. Also, the plastic coating over the container height of different plastics consist. In this case, the plastic coating at least in parts fiber reinforced be.

Of the Plastic coating can also over its cross section consist of different plastics or be so upset that the integral density over the cross section varies, each with the denser, solid layer as outer surface.

Also in this way, the enveloped glass container be specifically optimized.

Claims (10)

Glass vial which can be filled under pressure with an aerosol-sprayable substance and a propellant, comprising a shell part ( 1 ) with a molded bottom ( 3 . 3 ' ) and an integrally formed, tapered neck part with outflow opening and an opening-side bead-like end edge ( 2 . 2 ' ) for mechanically attaching a dispensing member, with which the opening of the glass vial is closable, or a threaded head ( 2 '' ) has a screw cap, and that of a plastic coating ( 4 ) is wrapped so that this also the bead-like end edge ( 2 . 2 ' ) or the threaded head ( 2 '' ) or the dispensing organ already applied, characterized in that the bottom ( 3 . 3 ' ), and for the bottom curvature radius R, the vial diameter D, and the outside curvature dimension S, the relationship: min Max S 1 mm D / 2 R 5 mm D / 2 consists, and that on the bottom side of the plastic coating has a over the entire floor cross section extending, the vault balancing flat footing. Glass vial according to claim 1, characterized in that the curvature of the soil ( 3 ) extends over the entire cross-section of the glass container. Glass vial according to claim 1, characterized in that the curvature of the soil ( 3 ' ) only over a pronounced part ( 3a ) of the cross-section, with a small-area flat bottom middle part ( 3b ). Glass vial according to one of claims 1 to 3, characterized in that in the plastic coating ( 4 ) Several, preferably hole-like pressure equalization openings are formed. glass vials according to one of the claims 1 to 4, characterized in that the cross section of the glass vial is rotationally symmetric. glass vials according to one of the claims 1 to 4, characterized in that the cross section of the glass vial is not rotationally symmetric. Glass vial according to one of claims 1 to 6, characterized in that the glass vial has a central constriction ( 5 ) having. Glass vial according to one of claims 1 to 7, characterized in that the edge region of the outflow opening as Crimprand ( 2 . 2 ' ) is trained. Glass vial according to one of claims 1 to 8, characterized in that the plastic coating ( 4 ) is applied by way of injection molding. Glass vial according to claim 9, characterized in that the plastic coating ( 4 ) is applied by way of injection molding by the reaction injection molding technique.