EP4370177A1

EP4370177A1 - Closure cap and closure system for a syringe that is prefilled with a medicament or medical active substance

Info

Publication number: EP4370177A1
Application number: EP22750827.2A
Authority: EP
Inventors: Horst Koller
Original assignee: Inductio Ag
Current assignee: Inductio Ag
Priority date: 2021-07-14
Filing date: 2022-07-14
Publication date: 2024-05-22
Also published as: WO2023285633A1; KR20240064626A; US20240335621A1; EP4119173A1; CN118139664A; CA3226420A1

Abstract

The invention relates to a closure cap (2, 2') for a syringe (40, 40') that is prefilled with a medicament or medical active substance, which closure cap is intended to reliably ensure a high degree of tightness while being easy to use. To this end, according to the invention the closure cap (2, 2') comprises a rigid support cap (6, 6') which is provided with an external thread (18) in a contact region (16) and has an internal channel (14) which extends in a longitudinal direction and in which a sealing plug (8, 8') made of a material which is softer and more deformable than the support cap (6, 6'), preferably rubber or TPE, is located.

Description

description

Closure cap and closure system for a syringe pre-filled with a drug or medicinal substance

The invention relates to a closure cap for a medication container, in particular for a syringe pre-filled with a medication or medicinal substance. It further relates to a closure system comprising such a closure cap.

Medicines, in particular for treatment in highly specialized or complex therapies, are usually made available in active ingredient or medicine containers, also referred to as containers or vials. Alternatively, drugs can also be provided in pre-filled syringes or syringe bodies. Such prefilled syringes, which usually make the subsequent handling by the staff, especially when administering the active substance, much easier, usually include the actual syringe body filled with the active substance, to which the syringe needle is attached immediately before the syringe is used for the purpose of administration attached, for example screwed on, is.

Especially in modern medical procedures or therapies, drugs or substances can be used that are actually toxic or otherwise harmful or dangerous. Personnel handling such substances, such as pharmacists and nurses, can thus be at risk of acute and long-term health risks, especially if they are repeatedly exposed to drugs or solvents used during the preparation, administration of drugs and other related treatments could escape into the air. This problem can be particularly serious when dealing with cytotoxins, antiviral drugs, antibiotics or radiopharmaceuticals. The potential health risks from exposure to these drugs summarize an increased risk of cancer, genetic changes and the like. Furthermore, in view of the fact that drugs with an extremely high dose price have recently been approved, it is urgently desirable or even necessary to reliably avoid the unintentional release of even the smallest amounts of such drugs or active ingredients into the environment.

It is therefore generally desirable to design the systems or components used in the administration of medicaments for particularly low material or active substance losses throughout the handling chain. For containers in which the medication is stored for a short time or for a certain period of time, ie in particular also for pre-filled syringes or pre-filled syringe bodies, a high degree of tightness of the closure system is therefore desirable. In addition, the components used should of course also be particularly easy and reliable to handle and also be inexpensive.

The invention is therefore based on the object of specifying a closure cap for a medication container, in particular for a syringe prefilled with a medication or with an egg nem medicinal active substance or a syringe body prefilled with a medication or with a medicinal active substance, with which, with simple handling, reliably a high tightness can be achieved. It also relates to a closure system comprising such a closure cap.

With regard to the closure cap, this object is achieved according to the invention with a rigid carrier cap which is provided with an external thread in a contact area for screwing onto the muzzle area of the syringe and has an inner channel extending in a longitudinal direction, in which a sealing plug is made of one compared to the carrier cap softer and better deformable material, preferably made of rubber or TPE. In this case, in particular, the inner channel provided in the carrier cap for receiving the sealing plug is provided with a circumferential latching edge. corresponding for this purpose, according to one aspect of the invention, the sealing plug has a snap-in edge that is adapted thereto and runs around the outside. This is in particular dimensioned and positioned in such a way that the sealing plug is fixed in the inner channel of the carrier cap by locking the two locking edges after it has been pushed into the inner channel.

Advantageous configurations of the invention are the subject matter of the dependent claims.

The invention is based on the consideration that the desired high level of tightness when closing the prefilled syringe body can be achieved by providing a sealing element whose material properties are specifically designed for this sealing effect. This should consist of a suitable material with suitable plastic properties, which on the one hand is compatible with the base materials commonly used for such syringe bodies, in particular glass or plastic. However, in order to ensure sufficient protection against external influences and thus a high level of reliability when temporarily storing the active ingredients, this sealing element should be surrounded on the outside by a carrier cap designed in the manner of a protective cap. The closure cap can thus be designed in the manner of a two-component design, with the desired high sealing effect being provided by the sealing element suitably designed in this respect and, on the other hand, the mechanical stability and resilience being provided by the protective carrier cap in the manner of a functional separation.

In terms of its design, the closure cap is therefore basically made of two components. For easier handling, however, the components should preferably be preassembled so that when the closure cap is actually attached to the syringe body, only one component has to be attached. Accordingly, according to one aspect of the invention, the inner plug provided as a sealing element is fixed in a latchable manner in the inner channel of the support cap.

In this configuration, the carrier cap can also be designed for particularly lighter and therefore easier-to-handle assembly on the syringe body. by being externally threaded in a suitable position intended for connection to the syringe body.

With regard to the choice of material, the components mentioned are advantageously specifically designed for the intended use for medical active substances and compatibility with the other materials customary in this area. For this purpose, the support cap is advantageously made of a plastic, preferably made of polypropylene (PP), a polyolefin, cyclo-olefin copolymer (COC), cyclo-olefin polymer (COP) or polycarbonate. In a further advantageous embodiment, both the sealing stopper and the carrier cap are each made of material of the “medical grade” quality level.

In order to make handling particularly easier, the closure cap is designed for attachment to and also later detachment from the syringe body by screws, ie by screwing on or off; this is achieved in particular by the external thread provided on the carrier cap. In order to facilitate the handling of the screwing or unscrewing processes for the operating personnel, the support cap is provided in a particularly advantageous embodiment with suitable gripping elements that make it particularly easy for the operator to grip the screw during the screwing movement. For this purpose, in a particularly advantageous embodiment, the carrier cap is provided on its outer circumference with a number of, preferably two, gripping grooves extending in the longitudinal direction in a handling region which is offset relative to the contact region when viewed in the longitudinal direction.

The external thread of the carrier cap is preferably a Luer thread.

In an alternative embodiment considered to be independently inventive, the closure cap can also be produced by a two-component injection molding process, in which the two components are produced together from the outset. The cap described above with its preferred Ausfüh insurance forms is basically provided zenkörper for screwing to the actual Sprit. It can thus be used immediately if the syringe body is already equipped with a suitable thread system according to its basic design, for example to be able to screw on a needle holder or the like at the mouth area of the syringe body later.

In another construction, syringe bodies of the type mentioned can be provided with a tapering mouth region onto which, for example, the needle holder can be clamped when the syringe is used. In order to also be able to use the closure cap with such a syringe body, also referred to as a "standard syringe", a closure system for a syringe prefilled with a drug or medicinal active substance with a closure cap of the type mentioned is required in an embodiment that is considered to be independently inventive intended. In addition to the closure cap mentioned, the closure system also includes a threaded adapter piece, which is provided in an outer jacket with an internal thread adapted to the external thread of the carrier cap, and which can be slid onto an end region of the syringe body, with a number of circumferential arranged clamping springs ver provided clamping ring has. The threaded adapter piece is advantageously made from a plastic, preferably from polypropylene (PP), a polyole fin, cyclo-olefin copolymer (COC), cyclo-olefin polymer (COP) or polycarbonate.

In an alternative or additional design that is considered to be independently inventive, a closure system for a syringe prefilled with a drug or medicinal substance includes, in addition to the above-mentioned closure cap, an outer cap that surrounds the latter on the outside. For fixing, according to one aspect of the invention, this comprises a receiving basket arranged at the end within an outer casing, into which the closure cap can be snapped or snapped. The receiving basket is in particular with regard to its geometry parameters, for example its free cross section, to the outer dimensions of the closure cap adjusted so that it can be inserted into the holding basket with a non-positive fit and fixed and guided by it.

The outer cap forms a tamper-evident closure for the closure cap in a particularly preferred embodiment that is considered to be independently inventive. For this purpose, the receiving basket can be provided with latching elements, for example, which latch with the closure cap when it is inserted, so that removal is no longer possible. To gain access to the active substance, i.e. to "open" and prepare the syringe closed in this way, suitable predetermined breaking points in the outer cap can be used to tear off a cover area of the outer cap, for example, so that the closure cap is exposed and thus made accessible.

The outer cap can be adapted to the outer diameter of the syringe in an embodiment that is also considered to be independently inventive by selecting a suitable geometry and size of its outer casing, so that when the outer cap is attached, a continuous outer casing for the syringe is formed from its outer casing and adapted to it the outer jacket of the outer cap. In this sense, by suitably varying the parameters, a similar closure system - while retaining the "inner" components, namely the sealing stopper and the carrier cap - can also be used for syringe bodies with different dimensions; in this sense, the outer cap thus serves to adapt the outer contours. In this way, a significantly increased usability of the elements can be achieved, especially in the case of particularly large quantities in production.

The advantages achieved with the invention consist in particular in the fact that the multi-component design of the closure cap means that a number of actually competing design goals, namely, for example, high tightness, high reliability, mechanical strength and/or ease of handling, can be achieved in equal measure. In addition, there is an intuitively usable twist-off mechanism, in particular through the suitable contouring of the carrier cap on the outside. The sealing cap ensures the integration Tat of the container or the syringe body, but can still be opened easily. It also offers a seamless fit for prefilled glass or polymer syringes. Container closure integrity is a major concern in the pharmaceutical industry in general. This is achieved in the same way as the user-friendliness, which is also important.

An embodiment of the invention will be explained in more detail with reference to a drawing. Show in it:

1 shows a closure system for a medication container, in particular for a syringe pre-filled with a medication or medicinal agent, in an exploded view,

2 shows a support cap of the closure cap of the closure system according to FIG.

1 in two different longitudinal sections,

3 shows a longitudinal section of a sealing plug of the closure cap of the closure system according to FIG. 1,

4 shows a threaded adapter piece 4 of the closure system according to FIG. 1,

Fig. 5 likes the closure cap of the closure system. Fig. 1 in perspective section,

FIG. 6 shows the closure system according to FIG. 1 in the assembled state in a perspective view,

7 shows the closure system according to FIG. 1 in the assembled state in two different longitudinal sections,

8 shows an alternative closure system for a medication container, in particular for a syringe pre-filled with a medication or medical agent, in an exploded view, Fig. 9 the closure cap of the closure system like. 8 in a longitudinal section in an exploded view,

Fig. 10 the closure cap of the closure system like. Fig. 8 in perspective section,

Fig. 11 the closure system like. 8 in an exploded view,

Fig. 12 the closure system like. 8 in a perspective view,

Fig. 13 the closure system like. 8 in perspective section,

Fig. 14 the locking system like. 8 in longitudinal section,

Fig. 15 like a with a cap. Fig. 9 closed syringe body with molded thread system before (Fig. 15a) and after (Fig. 15b) attachment of the closure cap,

Fig. 16 like a cap with a. Fig. 5 closed syringe body with molded thread system before (Fig. 16a) and after (Fig. 16b) attachment of the closure cap,

Fig. 17 like a with a locking system. Fig. 8 closed syringe body before (Fig. 17a) and after (Fig. 17b) attachment of the closure system,

Fig. 18 like a with a locking system. Fig. 1 closed syringe body before (Fig. 18a) and after (Fig. 18b) attachment of the closure system

Fig. 19 an alternative embodiment of a support cap in two lateral views (Fig. 19a, 19b), 20 shows an outer cap for use with the closure system according to FIG. 1 or FIG. 8 in a side view,

FIG. 21 shows the outer cap according to FIG. 20 in a perspective view from below,

Fig. 22 the outer cap like. Fig. 20 in two variants, each in longitudinal section,

23 shows a closure system with an outer cap according to FIG. 20 and a closure cap introduced therein in two variants, each in a longitudinal section, and

FIG. 24 shows the closure system according to FIG. 23 in the assembled state in two variants, each in longitudinal section.

Identical parts are provided with the same reference symbols in all figures.

The main components of the closure system 1 shown in Fig. 1 in an exploded view include the closure cap 2 actually provided for closing a container prefilled with a drug or a medical active substance, in particular a syringe, and an associated threaded adapter 4. The closure cap 2 is in turn multi-component, in particular two-component, so that several actually competing design goals can be achieved in the manner of a functional separation.

For this purpose, the closure cap 2 comprises as essential components on the one hand a rigid carrier cap 6 and on the other hand a sealing plug 8 made of a material that is softer and more deformable than the carrier cap 6, namely in particular rubber or TPE. The carrier cap 6, which is shown in Fig. 2 in two different longitudinal sections, is formed by a base body 10, which in turn is made of a plastic, in particular polypropylene (PP), a polyolefin, cyclo-olefin copolymer (COC) , cyclo-olefin polymer (COP) or polycarbonate, in each case in particular in the “medical grade” quality level. In this base body 10 is a the indicated by the longitudinal axis 12 longitudinally extending inner channel 14 incorporated, which is provided for receiving the sealing plug 8.

The main body 10 of the carrier cap 6 is provided in a "lower" contact area 16 for establishing the connection with the container or in particular the prefilled medical syringe with a - in particular with regard to common connection systems in the field of medical equipment preferably as a Luer thread designed - External thread 18 provided.

The closure cap 2 is thus, according to the design of the carrier cap 6, provided for a screw connection with the medication container or the prefilled medical syringe. In order to facilitate particularly easy handling of the closure cap 2 when attaching it to and also when later detaching it from the syringe body by screwing, i.e. by screwing it on or off, the carrier cap 6 is offset in a longitudinal direction from the contact area 16 arranged handling area 20 on ih rem outer circumference with - in the exemplary embodiment - two in the longitudinal direction he stretching grooves 22 provided. These form the handle elements that make it particularly easy for the operator to engage in the frictional connection during the screwing movement.

The sealing plug 8 is shown in Fig. 3 in longitudinal section. Its outer contour is adapted to the inner channel 14 in the base body 10 of the support cap 6 in terms of dimensioning and choice of geometry, so that it can be pushed into it. In its interior, on the other hand, it has a receiving channel 24 into which a corresponding opening contour of the respective syringe or medical container can be inserted. Due to the choice of material for the sealing stopper 8, namely rubber or TPE with correspondingly soft, elastic properties, the associated mouth area of the syringe or the medical container can be tightly closed.

The threaded adapter piece 4 is shown in Fig. 4 in longitudinal section (Fig. 4a) and in view from below (Fig. 4b). It is essentially made in one piece from a plastic, in particular from polypropylene (PP), a polyolefin, cyclo-olefin copoly- mer (COC), cyclo-olefin polymer (COP) or polycarbonate, and includes an outer jacket 26, which is provided with an internal thread 28 matched to the external thread 18 of the support cap 6. Furthermore, the threaded adapter piece 4 has, in a bottom end region 30, a clamping ring 34 that can be slid onto one end region of the syringe body and is provided with a number of clamping springs 32 that are arranged circumferentially.

In order to form the closure cap 2, which is basically designed as a two-component design, its components, the carrier cap 6 and the sealing plug 8, are first assembled. In particular, these components should be preassembled for easier handling, so that when the closure cap 2 is actually attached to the syringe body, only one component has to be attached. In order to enable such a stable assembly of the components, in the exemplary embodiment, the inner channel 14 provided in the carrier cap 6 for receiving the sealing plug 8 is provided with molded locking segments 36 on the inside, as they are particularly popular in the representation in longitudinal section in the appropriate direction. 2a can be seen. Correspondingly, the sealing stopper 8 has a snap-in edge 38 that is adapted to it and runs around it on the outside. This is adapted to the inner channel 14 and positioned in such a way that the sealing plug 8, after being pushed into the inner channel 14, is fixed in a latching manner in the inner channel of the support cap by hooking the aforesaid locking elements.

The closure cap 2 resulting from this assembly is shown in FIG. 5 in a perspective section. In this form, this closure cap 2 is intended and suitable for direct screwing onto the actual syringe body, provided that, according to its basic design, it is already equipped with a suitable thread system that is compatible with the external thread 18, for example to later attach a needle holder or the like to the To be able to screw on the muzzle area of the syringe body.

Alternatively, the closure cap 2 can also be combined with the threaded adapter piece 4 to form the closure system 1 which, for example, is based on fuel zen body can be pushed with a tapered mouth area. It is fixed to the syringe via the clamping ring 34, which can be slid onto the end region of the syringe body and is provided with a number of clamping springs 32 arranged circumferentially. For attachment to the syringe, locking system 1 in front of the actual Attachment to the syringe pre-assembled by the closure cap 2 with the external thread 18 in the internal thread 28 of the threaded adapter piece 4 is screwed. A closure system 1 preassembled in this way is shown in FIG. 6 in a perspective view and in FIG. 7 in two longitudinal sectional representations.

The closure cap 2 according to the invention provides on the one hand the desired high sealing effect through the sealing element 8 suitably designed in this respect and on the other hand the desired high mechanical stability and resilience through the protective carrier cap 6 .

An alternative closure system 1 ^' with a closure cap 2 ^' in an embodiment that is also considered to be independently inventive is shown in an exploded view in FIG. The main components are the alternative closure cap 2 ^' and also the associated threaded adapter piece 4. The closure cap 2 ^' is also made of two components in this variant, so that several actually competing design goals can also be achieved in the form of a functional separation. In this alternative embodiment, which is considered to be independently inventive, the closure cap 2 ^' is produced using a two-component injection molding process, in which the two components are produced together from the outset. The components of the closure cap 2 ^' are shown in FIG. 9 in a longitudinal section and for the sake of clarity in an exploded view, although they are not available separately due to the manufacturing process. 10, on the other hand, shows the complete closure cap 2 ^' produced in the two-component injection molding process in a perspective section. Also the cap 2 ^' like. Fig. 10 is intended and suitable in this form for direct screwing onto the actual syringe body if, according to its basic design, it is already equipped with a suitable thread system compatible with the external thread 18, for example a needle holder or the like later on To be able to screw on the muzzle area of the syringe body.

Alternatively, however, the closure cap 2 ^' can also be combined with the threaded adapter piece 4 to form the closure system 1, analogously to the variant described above, which can be pushed onto the syringe body with a tapering mouth area, for example. For attachment to the syringe, the closure system 1 ^' is preferably preassembled before the actual attachment to the syringe, in a design that is considered to be independently inventive, by screwing the closure cap 2 ^' with the external thread 18 into the internal thread 28 of the threaded adapter piece 4 , as indicated by the exploded view in FIG. The closure system 1 ^' pre-assembled in this way is shown in FIG. 12 in a perspective view, in FIG. 13 in a perspective section and in FIG. 14 in a longitudinal section.

Figures 15 to 18 each show a syringe body 40, 40 ^' in an embodiment with a molded thread system 42 (syringe body 40) or in an embodiment without such a thread system and instead provided with a tapering mouth area 44 (syringe body 40 ^' ), and although in the representation on the left before and on the right after the attachment of the respective closure element.

The syringe body 40 provided with the molded thread system 42 can in particular be a prefillable, comparatively small-volume syringe body 40 (filling volume, for example 0.5 ml) with a molded Luer thread, which is available as a standard product and is widely used, for example available as a “0.5 ml integrated Polymer Luer Thread Syringe”. The thread system 42 can be provided, for example, in order to later attach a needle holder or the like to the mouth area of the syringe body 40. to be able to screw. The closure caps 2, 2 ^' described above with their preferred embodiments are basically intended for screwing onto the actual syringe body 40 and are correspondingly adapted to the thread system 42 in the configuration of their external thread 18. They can thus be used directly with such a type of syringe body 40.

Alternatively and with additional recourse to the threaded adapter piece 4, the closure caps 2, 2 ^' can also be used in the alternative type of syringe body 40 ^' , also referred to as a "standard syringe", with a tapering mouth area 44. Such a prefillable syringe body 40 ^' is widely used, for example as a standard syringe with a filling volume of 1 ml. For this purpose, the respective closure system 1, 1 ^' can be pushed onto the mouth area 44 using the clamping ring 34 and clamped there.

An alternative embodiment of a carrier cap 6 ^″ is shown in FIG. 19 in two side views. In this embodiment, a large number of grilling grooves 22 running in the longitudinal direction are arranged on the outside of the handling area 20, which can make handling significantly easier.

An outer cap 50 that is considered to be independently inventive for use in the closure system 1,1 ^' in addition to the closure cap 2,2 ^' is shown in FIG. 20 in a side view, in FIG shown in longitudinal section. This has an outer casing 52 which, in the assembled state, is intended to completely enclose the closure cap 2, 2 ^' . Inside this outer casing 52 there is a receptacle basket 54 into which the closure cap 2, 2 ^' can be inserted or locked.

The receiving basket 54 is suitably adapted to the external dimensions of the closure cap 2, 2 ^' , particularly with regard to pre-assembly of the components, so that the latter can be inserted into the receiving basket 54 in a non-positive manner and fixed and guided by it. This becomes clear in particular in the representation in FIG. 23, each in longitudinal section, in which the closure system 1, 1 ^' with the outer cap 50 and the closure cap 2, 2 ^' inserted therein.

In the exemplary embodiment, the outer cap 50 forms a tamper-evident closure for the closure cap 2, 2 ^' . For this purpose, the receiving basket 54 is provided with latching elements 56 which latch with the closure cap 2, 2 ^' when it is inserted so that removal is no longer possible. To gain access to the active substance, i.e. to "open" and prepare the syringe closed in this way, a cover area of the outer cap 50 can then be torn off through suitable predetermined breaking points in the outer cap 50, for example, so that the closure cap 2, 2 ^' is exposed and therefore accessible is made.

The preassembled ensemble of outer cap 50 and inner closure cap 2, 2 ^' shown in FIG. 23 can then be attached particularly easily to the respective syringe, in particular by screwing it on. This is shown in longitudinal section in FIG. In particular, the thread 18 is in a screw connection with the internal thread 42 of the syringe body 40. The outer cap 50 is adapted to the outer diameter of the syringe in a design that is also considered to be independently inventive through a suitable choice of geometry and size of its outer casing 52.

Reference List

1, 1 ^' locking system

2, 2 ^' locking cap

4 thread adapter piece

6, 6 ^' carrier cap

8, 8 ^' sealing plug

10 basic bodies

12 longitudinal axis

14 inner canal

16 contact area

18 external thread

20 handling area

22 grip groove

24 recording channel

26 outer jacket

28 internal thread

30 end area

32 clamp spring

34 clamping ring

36 detent segment

38 locking edge

40, 40 ^' syringe body 42 thread system

44 mouth area

50 outer cap

52 outer jacket

54 receiving basket

56 locking elements

Claims

Expectations

1. Closure cap (2, 2 ^' ) for a syringe (40, 40 ^' ) pre-filled with a medicament or medicinal agent, with a rigid carrier cap (6, 6 ^' ) provided with an external thread (18) in a contact area (16) which has an inner channel (14) extending in a longitudinal direction, in which a sealing plug (8, 8 ^' ) made of a material that is softer and more deformable than the carrier cap (6, 6 ^' ), preferably made of rubber or TPE , is arranged, wherein the inner channel (14) provided in the carrier cap (6) is provided with locking segments (36) arranged on its inner circumference, and wherein the sealing plug (8) has a locking edge (38) dimensioned in this way, which extends around the outside and is adapted thereto that the sealing plug (8) is fixed in a latching manner after it has been pushed into the inner channel (14).

2. Closure cap (2, 2 ^' ) according to claim 1, whose carrier cap (6, 6 ^' ) made of a plastic, preferably polypropylene (PP), a polyolefin, cyclo-olefin copolymer (COC), cyclo-olefin polymer ( COP) or poly carbonate is made.

3. Closure cap (2, 2 ^′ ) according to claim 1 or 2, the carrier cap (6, 6 ^′ ) of which is arranged in a handling region (20) on its outer circumference offset in the longitudinal direction to the contact region (16) with a number of, preferably is provided with two grip grooves (22) extending in the longitudinal direction.

4. Closure cap (2, 2 ^' ) according to any one of claims 1 to 3, the external thread (18) is designed as a Luer thread.

5. Closure cap (2 ^' ) according to any one of claims 1 to 4, obtained by production in the two-component injection molding process.

6. Closure system (1, 1 ^' ) for a syringe (40 ^' ) pre-filled with a drug or medicinal active substance, with a closure cap (2, 2 ^' ) according to one of claims 1 to 5, and with a threaded adapter piece (4 ), which is provided in an outer casing (26) with an internal thread (28) adapted to the external thread (18) of the support cap (6, 6 ^' ), and which has a tapering mouth region (44) of the syringe body (40 ^'). ) slide-on clamping ring (34) provided with a number of circumferentially arranged clamping springs (32).

7. closure system (1, 1 ^' ) according to claim 6, the threaded adapter piece (4) made of a plastic, preferably polypropylene (PP), a Po lyolefin, cyclo-olefin copolymer (COC), cyclo-olefin polymer ( COP) or polycarbonate.

8. Closure system (1, 1 ^' ) for a syringe (40 ^' ) pre-filled with a drug or medicinal active substance, in particular according to claim 6 or 7, with a closure cap (2, 2 ^' ) according to one of claims 1 to 5, and with an outer cap (50) surrounding the closure cap (2, 2 ^' ) and having a receptacle (54) for the closure cap (2,2 ^' ) arranged at the end within an outer jacket (52).

9. Closure system (1, 1 ^' ) according to claim 8, whose outer cap (50) forms a tamper-evident closure for the closure cap (2, 2 ^' ).