EP4294740A1 - Cap for closing a container for administering a medication, and method for producing same - Google Patents
Cap for closing a container for administering a medication, and method for producing sameInfo
- Publication number
- EP4294740A1 EP4294740A1 EP22710003.9A EP22710003A EP4294740A1 EP 4294740 A1 EP4294740 A1 EP 4294740A1 EP 22710003 A EP22710003 A EP 22710003A EP 4294740 A1 EP4294740 A1 EP 4294740A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- septum
- cap
- dome
- cap according
- radially
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003814 drug Substances 0.000 title claims abstract description 14
- 229940079593 drug Drugs 0.000 title claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 238000007789 sealing Methods 0.000 claims description 43
- 239000000463 material Substances 0.000 claims description 33
- 230000007704 transition Effects 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 7
- 229920002725 thermoplastic elastomer Polymers 0.000 claims description 6
- 239000004698 Polyethylene Substances 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 239000012815 thermoplastic material Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 229920001903 high density polyethylene Polymers 0.000 claims description 2
- 239000004700 high-density polyethylene Substances 0.000 claims description 2
- 239000004615 ingredient Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 7
- 238000001802 infusion Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 241001631457 Cannula Species 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D51/00—Closures not otherwise provided for
- B65D51/002—Closures to be pierced by an extracting-device for the contents and fixed on the container by separate retaining means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
- A61J1/14—Details; Accessories therefor
- A61J1/1406—Septums, pierceable membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
- B29C65/16—Laser beams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/56—Stoppers or lids for bottles, jars, or the like, e.g. closures
Definitions
- Cap for closing a container for administering a drug and method for its manufacture
- the present application relates to a cap for closing a container for administering a drug and a method for its manufacture.
- Caps for closing pharmaceutical containers are subject to a large number of safety aspects, both with regard to the tightness against the escape of pharmaceuticals and the entry of media from the outside. Therefore, in the context of further developments, considerations often have to be made with regard to various design aspects.
- EP 2376341 A1 discloses a closure for a medication container, which has a receptacle spaced from a cap wall and directed inwards from the base area of the cap for the mechanical decoupling of deformation forces on the outer wall.
- the outer wall of the cap protects the receptacle and its mount from mechanical external influences.
- a septum within the cap is held under pretension.
- a dead volume is created by the shape of the septa.
- the septa shapes can differ greatly from one another.
- FIGS. 7 and 8 a generic variant of a cap with septa is shown in FIGS. 7 and 8, which have a circumferential annular groove 39 in relation to the insertion area. This annular groove represents a dead volume in which liquid that is not delivered to the patient can collect.
- FIGS. 9a and 9b the septum is thick and protruding.
- the increase in the sealing forces with an increase in the radial prestressing also disadvantageously leads to an increase in the piercing forces of the piercing parts.
- the radial prestressing of the septa during assembly in the cap must be such that the piercing length and thus the piercing resistance is selected in such a way that the sealing and holding function is improved and the piercing forces can be reduced.
- the feature named in the main claim also made it possible to save material and costs for the manufacture of the septa.
- Sealing between the cap and the septum can be achieved in a number of ways with a septum.
- the tightness of the septum to the cap is primarily achieved by clamping the septum in the cap using a clip part 26 .
- the generic DE 102016003253 A1 shows a variant of a septum with a peripheral sealing lip 16 which merges into a sealing surface in the middle.
- this sealing surface can have a flat profile.
- the sealing lips 16 are solid for reasons of ensuring sufficient prestressing for adequate tightness and are recognizable in relation to the receiving space.
- a dead volume is thus formed in the intermediate space or dead space between the septa and also between each septum and the cap wall, as can be seen in FIG.
- the formation of a dead volume or dead space is reduced in DE 102016003 253 A1 compared to other septa, but not completely prevented. This is required because the septum is held in the cap in a non-positive manner without additional material bonding such as gluing or welding.
- a cap according to the invention for closing a container for administering a medicament comprises a pot-shaped body with a cavity with at least one or more openings and a base plane for delimiting the cavity at least in certain areas.
- the cavity can have openings, in particular on opposite sides of a lateral surface, e.g. An opening can be provided in the bottom area of the cap.
- the body also has a dome with an end opening which is closed by the septum, the dome protruding from the bottom plane on a side of the bottom plane that is opposite to the cavity.
- the said opening in the bottom area of the cap can merge into another cavity within the dome. This cavity is closed to the outside by the septum.
- no protection against deformation forces acting from outside was provided, but the dome is exposed to these deformation forces.
- the contact surface of the dome is so small that the probability of deformation in this area is comparatively low.
- the dosage of an infusion bag is all recently more accurate, especially in the case of an overhead infusion with a suspended infu sion bag, since the cap does not have any undercuts in which medication remains.
- the cap can also be used for multiple applications if necessary.
- the septum is inserted under pretension in a receiving space of the dome. This supports a sealing closure of the septum after it has been perforated once and in particular multiple times by a needle, cannula or other element.
- This prestressing can be additionally increased by a number of constructive design variants, so that the prestressing is so great that the tightness of the septum is not affected even by deformation of the outer wall of the dome.
- Corresponding advantageous refinements of the invention, in particular of the said structural design variants, are the subject of the claims at under.
- the septum has an oversize of at least 2.5%, preferably 3-10%, compared to a first radial inner surface of the receiving space. Septa with a high material thickness usually cannot cope with an interference fit to this extent. It is therefore advantageous if the axial extent of the area in which the septum has a closed surface over the width of the dome runs over less than 70% of the dome height.
- the thickness of the septa can be reduced or the length of the puncture in the septum. As a result, lower puncture forces are required and the tearing of the material during the puncture is reduced.
- a material connection e.g. as a welded connection or adhesive connection
- This material-to-material connection can particularly preferably be designed as a welded connection.
- a welded connection running radially around the center axis B of the dome is particularly preferred.
- this welded connection then forms a second safety measure, i.e. a so-called “second line of defense” against the escape of medication or the entry of medium.
- the welded connection is particularly preferably positioned in such a way that radial tensile forces act on the septum if a puncture occurs. This is an advantage, since material displacement, which occurs with thick septa, is compensated for by the pulling movement. Such radial tensile forces occur in particular when the septum is welded to the body in the axial direction, based on its own septum central axis or septum longitudinal axis.
- the septum can be made of a thermoplastic elastomer, especially since this can be welded and is particularly well suited to building up a prestress due to its elastic properties.
- Individual sections, e.g. individual layers, of the septum can also be made of a different material, although at least the contact surface on the dome on which the welding takes place should preferably consist of the TPE material. In a particularly preferred manner, however, the entire septum can also consist of TPE.
- the cap can have a second radially-circumferential inner surface for delimiting the receiving space with a smaller mean diameter than the first radially-circumferential inner surface.
- the material connection can preferably be arranged between the first and the two radially circumferential inner surfaces.
- the anchor point of the septum of the cap lies between two essentially equivalently working preload areas.
- This is particularly disadvantageous due to the consumption of material and the increased force required to make a puncture.
- Due to the conical contour and/or the optimal positioning of the anchor point in the form of a welding or adhesive point between two comparably short lever arms Due to the conical contour and/or the optimal positioning of the anchor point in the form of a welding or adhesive point between two comparably short lever arms, a better force distribution of the prestressing in the sealing area can be achieved and thus a better sealing effect.
- the thickness of the septum can be minimized at the same time.
- the cap particularly preferably has two domes with an identical contour. This leads to a considerable saving in material, especially in connection with the reduced septum thickness with a simultaneously improved sealing effect.
- the septum can have a closed sealing surface running across the width of the septum, with a radially circumferential web protruding from this sealing surface, which, unlike in EP2376341 A1, is not mechanically decoupled from the outer wall of the cap, but is part of a forms the outer surface of the septum running radially around it, which is in contact with the inner surface of the dome.
- the web is thus supported on the side wall of the dome and serves as a spring arm to build up axial restoring forces when the septum is axially deformed.
- deformation of the wall of the dome also leads directly to deformation of the web.
- a cap with a seal is achieved by prestressing and by a material connection.
- the material connection seals securely against lateral discharge of the drug, while the bias next to the marginal seal also contributes to the reclosure of the septum after its perforation.
- FIG. 1 shows a sectional view of an embodiment variant of a cap according to the invention
- FIG. 2 shows a top view of the cap according to the invention.
- Fig. 1 and Fig. 2 show a cap 1 for closing a non-detailed Darge presented container, such as an infusion bottle or an infusion bag.
- the body 25 is essentially dimensionally stable.
- the body 25 has a pot-shaped basic shape with an open cavity 24 typical of this shape.
- An opening 27 is used to insert or attach the cap to a suitable container, e.g. a bottle or a bag.
- This flea space 24 is bordered by a conical first wall segment 6, which defines a central axis A of the cap.
- the deviation of the cone shape of the wall segment from a cylindrical shape is less than 5°, preferably between 1-3°. This enables contact pressure to be applied to the container.
- the body 25 has a receiving geometry for two septa 2 above the cavity 24 delimited by the first wall segment 6 .
- the transition from the base plate 5 to the receiving geometry is stepped.
- the septa consist of a second material with a lower hardness than the body 2, so that it can be punctured with the usual means of medical technology.
- the material is particularly preferably a TPE, ie a thermoplastic elastomer.
- the receiving geometry of the body 25 in FIG. 1 comprises two domes 26 which are connected to one another via a web 9 and which protrude from the floor plane 5 or from the side of the floor plate 5 which is remote from the cavity 24 .
- the web 9 has a depression in the form of a channel 23 .
- only one dome can be formed in a modification of the present invention.
- Each dome 26 defines a dome center axis B and delimits a receiving space 20 for a respective septum 2, the receiving space being open on both sides axially with respect to said dome center axis B.
- the second opening 17 is closed by the septum 2 sen.
- the sum of the mean diameters of both receiving spaces of the dome 26 is smaller than the mean diameter of the hollow space 24.
- Each dome 26 also has a first conical inner surface 16 running radially around it, which delimits the accommodation space for accommodating the septum 2 .
- the conical circumferential inner surface 16 defines a mean diameter as the average of all diameters over the contact area of the inner surface with the septum.
- the respective septum 2 in the contact area with this first inner surface 16 has an excess of at least 2.5%, preferably 3-10%.
- the oversize is shown in FIG. 1 with reference number 3 .
- the septum 2 has, in particular, the septum 2 has a first radially circumferential conical outer surface 13 which defines an average diameter.
- the difference between the diameters of the outer surface 13 of the septum 2, in the dismantled state, and the inner surface 16 of the dome 26 defines said oversize 3, so that the average diameter of the outer surface 13 of the septum 2 in the dismantled state is at least 2.5%. is larger than the diameter of the inner surface 16 of the dome 26.
- the dome 26 includes a stepped transition 7 with a conical inner surface 11 running radially around the dome and a second one, which ends in the opening 17 .
- the outer surface 12 of the respective septum 2 in the contact area with this second inner surface 11 has an oversize 18 of at least 2.5%, preferably 3-10%, the oversize 18 relating to the demounted state of the septum 2 .
- the second conical radial inner surface 11 has a larger conicity, ie a greater deviation from the course of a parallel-running cylin derform, than the first conical radial inner surface 16.
- the oversize can preferably be smaller than the oversize in Area of the first inner surface 16, so that a gradual bias is built up over the course of the dome center axis. This allows an initial displacement of material of the septum 2 in the puncture area to the outside, but at the same time a sealing effect can also be achieved in this area.
- the stepped transition 7 of the dome 26 comprises a surface segment 10 running essentially parallel to the sealing plane 50.
- the surface segment 10 can also have an oblique, in particular conical shape. This surface segment 10 has a material connection between the dome 26 and the septum 2 .
- the material connection in the surface segment 10 is preferably a welded connection.
- the welded joint can be produced by laser welding, with the laser beam forming an outer surface of the sealing plane 50 Cap 1, in particular an end face 8 of the cap 1, can be directed, which has manufacturing advantages and advantages for the sealing effect.
- the septum rests on the inner surface of the dome 26 essentially without pretension. This reduces material stresses during welding, so that a sealing effect is strengthened and separation of the material is prevented.
- the septum 2 has a closed sealing surface 19 which is directed towards the cavity 24 and runs over the width of the septum.
- a radially circumferential web 14 protrudes from this sealing surface and forms part of the radially circumferential outer surface of the septum 2 in contact with the inner surface 16 of the dome.
- the sealing surface 19 has a flat profile in the area between the radially running web 15, in particular an exclusively flat profile.
- Fig. 1 also shows that the width of this flat course of the sealing surface 19 we significantly more than 50% of the total width of the septum 2 occupies.
- the web 14 rests against the inner surface 16 of the dome 26 and is flush with the receiving space 20 of the dome 26 .
- the dome 26 protrudes from the base plate 5, the receiving space 20 of the dome 26 as shown in FIG.
- This web 14 increases the sealing effect of the septum 2 in the edge area and enables a high prestress to be built up, with the free space between the opposite segments of the web 14 also being able to be used for material displacement, e.g. when a needle punctures the septum.
- the sections of the web 14 act as spring arms when the septum is deformed in the axial direction, e.g. when larger cannulas are punctured in the septum. This creates a restoring force in the axial direction, so that when the cannula is removed, in addition to the radial pretension, an axial component acts when the puncture site is closed.
- the ridge may preferably have a radial mean width of less than 50%, preferably less than 35%, of the axial height of the outer surface of the septum 2 in contact with the inner surface 16 of the dome 26.
- the conicity of the second inner surface 16 of the dome 26 is also less than that of the first inner surface 11, so that another, in particular lower, pretension in the septum 2 is built up during the puncture in the upper area of the septum 2 than in the lower area, whereby here “above” and “below” refers to the puncture direction E and the position of the sealing surface 50 from which the puncture takes place.
- FIG. 1 What is not shown in FIG. 1 is that the web 9 between the two septa 2 is connected to the base plate 5 in the plane of the illustration. Overall, the top view of the cap in the puncture direction results in an oval basic shape for the entire receiving geometry, including the dome 26.
- the cap 1 shown in FIG. 1 is represented in an idealized manner.
- the sealing plane 50 is defined by the opening edges of the openings 17 .
- the septum end face which is essentially perpendicular to the puncture direction, is slightly curved compared to the sealing plane due to the prestress
- the method comprises a first step in which a body 25 is provided.
- This body 25 can be produced, for example, by an injection molding process or by another suitable plastics processing process.
- the septa 2 can be inserted into the receiving space 20 of the dome 26 of the body 25 . It can be inserted by pressing the septa by applying a contact pressure.
- This contact pressure can be at least partially maintained in the following step, in which a material connection is produced between the respective septum 2 and the body 25 .
- the material connection he follows on the surface segment 10, preferably by a welded joint. This can be achieved by laser welding.
- the septum, or the sealing plane, can then be covered by a cover element 22, for example a plastic or aluminum foil or a plastic molded body, which can be part of the cap. This can be seen, for example, in the top view of FIG.
- the cap can then be packaged under aseptic conditions.
Landscapes
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Pharmacology & Pharmacy (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Optics & Photonics (AREA)
- Electromagnetism (AREA)
- Toxicology (AREA)
- Closures For Containers (AREA)
- Medical Preparation Storing Or Oral Administration Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021104026.4A DE102021104026A1 (en) | 2021-02-19 | 2021-02-19 | Cap for closing a container for administering a drug and method for its manufacture |
PCT/EP2021/063705 WO2022174934A1 (en) | 2021-02-19 | 2021-05-21 | Cap for closing a container for administering a medication, and method for producing same |
PCT/EP2022/053704 WO2022175282A1 (en) | 2021-02-19 | 2022-02-15 | Cap for closing a container for administering a medication, and method for producing same |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4294740A1 true EP4294740A1 (en) | 2023-12-27 |
Family
ID=80739094
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP22710003.9A Pending EP4294740A1 (en) | 2021-02-19 | 2022-02-15 | Cap for closing a container for administering a medication, and method for producing same |
Country Status (5)
Country | Link |
---|---|
US (1) | US20240124201A1 (en) |
EP (1) | EP4294740A1 (en) |
JP (1) | JP2024510885A (en) |
MX (1) | MX2023009647A (en) |
WO (1) | WO2022175282A1 (en) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19818314A1 (en) | 1998-03-09 | 1999-09-16 | Braun Gmbh E | Container cap closure especially for a pharmaceutical container e.g. containing an infusion or transfusion solution |
DE102008009418B3 (en) * | 2008-02-15 | 2009-04-09 | Spang & Brands Gmbh | cap |
DE102008060995A1 (en) | 2008-12-09 | 2010-06-10 | West Pharmaceutical Services Deutschland Gmbh & Co. Kg | Closure for a medicine container |
DE102008060457A1 (en) | 2008-12-09 | 2010-06-10 | West Pharmaceutical Services Deutschland Gmbh & Co. Kg | Closure manufacturing method for sterile medicament container, involves introducing sealing element into closure body, bringing annular- and grid shaped regions in contact with each other, cooling and connecting regions |
DE102016003253A1 (en) | 2016-03-16 | 2017-09-21 | Braunform Gmbh | Modular and adaptable cap for containers. |
DE102017000048A1 (en) | 2017-01-05 | 2018-07-05 | Kocher-Plastik Maschinenbau Gmbh | container |
-
2022
- 2022-02-15 MX MX2023009647A patent/MX2023009647A/en unknown
- 2022-02-15 WO PCT/EP2022/053704 patent/WO2022175282A1/en active Application Filing
- 2022-02-15 JP JP2023550160A patent/JP2024510885A/en active Pending
- 2022-02-15 EP EP22710003.9A patent/EP4294740A1/en active Pending
- 2022-02-15 US US18/277,816 patent/US20240124201A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
JP2024510885A (en) | 2024-03-12 |
US20240124201A1 (en) | 2024-04-18 |
WO2022175282A1 (en) | 2022-08-25 |
MX2023009647A (en) | 2023-08-24 |
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