EP1152946B1 - Machines d'emballage a fonctionnement aseptique et procede de leur presterilisation - Google Patents

Machines d'emballage a fonctionnement aseptique et procede de leur presterilisation Download PDF

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Publication number
EP1152946B1
EP1152946B1 EP00993397A EP00993397A EP1152946B1 EP 1152946 B1 EP1152946 B1 EP 1152946B1 EP 00993397 A EP00993397 A EP 00993397A EP 00993397 A EP00993397 A EP 00993397A EP 1152946 B1 EP1152946 B1 EP 1152946B1
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EP
European Patent Office
Prior art keywords
sterile
sterilizing agent
steam
nozzle
sterile air
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.)
Expired - Lifetime
Application number
EP00993397A
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German (de)
English (en)
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EP1152946A1 (fr
Inventor
Gunter Kurth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hassia Verpackungsmaschinen GmbH
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Hassia Verpackungsmaschinen GmbH
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Publication of EP1152946A1 publication Critical patent/EP1152946A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B55/00—Preserving, protecting or purifying packages or package contents in association with packaging
    • B65B55/02—Sterilising, e.g. of complete packages
    • B65B55/04—Sterilising wrappers or receptacles prior to, or during, packaging
    • B65B55/10—Sterilising wrappers or receptacles prior to, or during, packaging by liquids or gases
    • B65B55/103—Sterilising flat or tubular webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B55/00—Preserving, protecting or purifying packages or package contents in association with packaging
    • B65B55/02—Sterilising, e.g. of complete packages
    • B65B55/025—Packaging in aseptic tunnels

Definitions

  • the invention relates to aseptically operating packaging machines and a method for their pre-sterilization.
  • Under Packaging machines are special in the present case to understand two ways, i.e., one in which a packaging material web made of a suitable thermoplastic film continuously conveyed through the machine in time, preheated, thermoformed, filled and with a cover film is closed, and the other so-called Tubular bag machines, in which the packaging material web also formed into a tube in the cycle, longitudinally sealed, the Hose closed at the bottom, then filled and closed at the top is and separated from the re-fed hose becomes.
  • thermoforming packaging machines are preheating plates, the deep-drawing tools and the filling and closing elements for the packaging material web running through in cycles, and with tubular bag packaging machines, these are the entire bag-form and filling station with its heatable longitudinal sealing tools and all packaging material guide elements upstream of this station.
  • the sterile rooms of such machines are continuously supplied with sterile air during operation with a slight overpressure in order to maintain the sterile atmosphere during operation free of recontamination, certain areas of the sterile rooms ensuring that the sterile air can flow out of the sterile room again. After such machines have been shut down, be it for reasons of an end of work shift or for whatever reason, it is necessary to sterilize the sterile rooms and the above-mentioned processing elements before starting up again.
  • a method for pre-sterilizing the surfaces of objects in which the surfaces are first treated with flowing steam before the supply of hydrogen peroxide (so-called peroxide) as a sterilizing agent in order to treat all those to be treated Really heat surfaces. Only after such heating is the peroxide mixed into the steam, which additionally increases its temperature. After this pre-sterilization, the subsequently added peroxide is then flushed away by unheated sterile air. Since the desired heating of the surfaces is inevitably also associated with their initially sterilizing agent-free condensate wetting, it remains to be seen to what extent the steam-sterilizing agent mixture flowing in in the second stage can then become fully effective.
  • peroxide hydrogen peroxide
  • a further disadvantage is that the surfaces to be sterilized are heated by the steam heating and the subsequent further steaming with the addition of sterilizing agent in such a way that condensation of the steam / sterilizing agent mixture is no longer reliably guaranteed on all surfaces.
  • the dilemma to be noted here is that the chemical reactivity of the condensing, i.e. liquid, sterilizing agent increases on the one hand, but on the other hand its reactivity with respect to the killing of microorganisms and spores decreases significantly as soon as the sterilizing agent is no longer in liquid form, but instead changes into the gaseous state (evaporation).
  • DE-A-197 26 222 A1 also deals with the question of pre-sterilization, specifically in connection with a device specially designed for this purpose, equipped with a so-called reversing fan, in order to gas the sterile rooms with their tools therein in two different directions -respectively. to be able to flow through sterile vapor.
  • this device Apart from the reversing blower required for this, this device requires a disproportionately large amount of line and a considerable number of reversible valves with a corresponding control and monitoring effort for the valves.
  • the sterilizing agent is introduced between two filters in this device, which is associated with the risk of clogging of the fine filter downstream of the blower.
  • Pre-sterilization of a sterile tunnel is also provided in a device according to US Pat. No. 3,820,300, a liquid sterilizing agent being injected before the actual packaging processing of the supplied sterile air. After the pre-sterilization is complete, the sterilization agent injection is simply switched off.
  • the invention is accordingly based on the object, the necessary Not only perform pre-sterilization satisfactorily, but also the equipment expenditure to a minimum hold and connected with the stipulation that for the normal Packaging company requires sterile air supply anyway with as controllable funding for one right from the start Steam-sterilizing agent mixture supplied in a predeterminable mixing ratio to use and thereby ensure that this total mixture in the room to be sterilized and on the processing tools in it temperature conditions finds the one hand the unimpeded condensation of the steam sterilizing agent mixture on surfaces as well guaranteed in crevices and crevices and on the other hand also by means of defined temperature control optimally ensures chemical reactivity of the sterilizing agent.
  • the aseptic packaging machine still consists of a processing line equipped with packaging material treatment elements in a partially open to the atmosphere sterile room, which is provided with elements for supplying sterile agent and a connection for a sterile air generator equipped with blower, heating and sterile filter.
  • such a packaging machine for pre-sterilization is configured as follows: Downstream immediately behind the sterile air filter, a mixing nozzle connected to a steam and a sterilizing agent supply line is arranged in a sterile air channel opening into the sterile room, which is arranged pointing in the direction of the confluence of the sterile air channel in the sterile room, and in the sterilizing agent supply line is an upstream pressure reducing valve under constant pressure held sterilizing agent supply container and in the steam supply line a pressure reducing valve with downstream steam quantity regulator is provided.
  • the invention is therefore not limited to itself simple requirement, a large number of injection or injection points, as in the machines according to DE-A-197 26 222 and to reduce the US-A-3,820,300 to one because with that alone would be a satisfactory pre-sterilization result for the whole Not reachable sterile room, but it is also the above additional procedural and figurative Characteristics required because, on the one hand, there is a special Placement (utilizing the sterile air flow) and a directional orientation the mixing nozzle have proven necessary and on the other hand satisfactory germ killing ensuring the mixing ratio of steam and sterilizing agent Must be taken into account.
  • Fig.1 is an aseptic thermoforming packaging machine shown for the production and filling of cups, whose processing line VS for the packaging material web PB from a so-called bordering the sterile room 1 to the outside Sterile tunnel 18 covered with a sterile air supply channel 2 and is the stations shown only schematically 100, 101, 102, 103 for film preheating, molding, filling and Closing the cup-like containers B contains. Bezgl. Such a machine is referred to EP-A-0 727 357.
  • a pressure reducing valve 9 for setting a constant steam pressure to effect with subsequent steam quantity control and to supply the sterilizing agent, usually 35% in aqueous solution, to the mixing point under constant pressure, is essential for the machine that downstream immediately after the sterile air filter 6 in the sterile air channel 2 opening into the sterile room 1, one with a steam and a mixing nozzle 3 connected to a sterile agent supply line 8, 11 is arranged, which is arranged pointing towards the mouth 2 'of the sterile air channel 2 into the sterile room 1.
  • a sterile medium supply container 12 which is kept under constant pressure with an upstream pressure reducing valve 13 and in the steam supply line 8 there is a pressure reducing valve 9 with a downstream steam quantity regulator 10.
  • 3 shows a cross section through a so-called half-tunnel 18 which delimits the sterile room 1.
  • 3 also illustrates the partial openness of the sterile room 1 to the atmosphere, namely at the lower edges 18 'of the sterile tunnel 18. This partial openness to the atmosphere enables the sterile air flowing under slightly overpressure in the sterile room 1 to flow continuously during normal packaging operation, as illustrated by arrows P, but also of the steam sterilizing agent mixture during the pre-sterilization that is of interest here.
  • the mixing nozzle 3 As for the mixing nozzle 3, this is with reference on Figure 2 in the form of a double nozzle 3 ', the so-called nozzle set 3 "for sterile introduction, that for example with a concentration of 35% in aqueous solution as Hydrogen peroxide supplied and in the from line 3 '' ' sprayed out as a flow hose and thereby being intensely mixed with the steam that comes together with the sterile air the sterilant throughout Sterile room 1 carries and distributed there, the Steam with the sterilizing agent also in all corners and Gussets on the walls of the sterile room 1 and the treatment elements precipitates or condenses.
  • the sterile air supply is activated during the start-up phase of the pre-sterilization for the purpose of partial reverse current generation of the Sterilizer mixture up to the upstream Sterile filter 6 out briefly defined to the sterile air filter is also easy with the pre-sterilization 6 to be recorded.
  • defined for a short time are understood to mean, for example, 15 to 30 seconds for one Total pre-sterilization time of, for example, approx. 3 to 5 minutes.
  • the device is designed such that downstream in a short distance behind the mixing nozzle 3 a flow resistance 15, as shown on a canal kink itself there arranged conically narrowing sterile air supply channel 2 is.
  • the drive 4 'of the blower 4 in a pre-filter 6' and an air heater 5 having sterile air generator 7 is for such a brief interruption of the sterile air supply an adjustable timer 16 provided.
  • At least during the aforementioned start-up phase of pre-sterilization is also the sterile filter 6 on the upstream side with sterilizing agent sprayed for what upstream of the sterile filter 6 a sterilizing agent nozzle 17 is arranged, with the sterilant dispenser 12 as shown in Fig. 1 indicated by dash-dotted lines, connected to a line 17 ' is.
  • the Temperature for the pre-sterilization advantageously kept below 120 ° C, ie at a temperature level of preferably 40-80 ° C. If the pre-sterilization should be carried out after a brief interruption of the machine's operation, after which the preheating elements 19 are still relatively hot, the pre-sterilization is only initiated when these elements have cooled down accordingly. This process can be monitored and controlled by the machine controller via temperature sensors which are already present in this area in such machines.
  • FIG. 4 is a tubular bag machine.
  • the heatable elements which have to cool here for the pre-sterilization, ie, have to be tempered, are the longitudinal sealing jaws 20, with which the packaging material tube 22 formed on the molded tube 21 is sealed longitudinally. Since tubular bag machines of this type are sufficiently known with regard to their function, there is no need to describe them in detail. Otherwise, the same reference numerals are used for corresponding elements of such a tubular bag machine as in the deep-drawing packaging machine described in accordance with FIG.
  • the temperature control mentioned above can, like all others Control and regulation requirements Part of an overall control (not particularly shown) of the packaging machine in question be no matter whether it is a machine after Fig.1 or Fig.4 is.
  • the still hot treatment elements located in the sterile room are carried out before the start of pre-sterilization Allow to cool to a temperature below 120 ° C, i.e. to below the dew point temperature of the steam sterilizing agent mixture or preferably to 40-80 ° C. If the machine the heater has cooled down due to a long period of inactivity the preheating elements 100 or the longitudinal sealing jaws 20 are switched on until they have reached this temperature.
  • the mixing of water vapor and sterilizing agent takes place directly in the mixing nozzle 3, to which both components are fed, and the water vapor-sterilizing agent mixture is passed through the mixing nozzle 3 at a single point in the sterile air supply channel 2 downstream immediately behind the sterile filter 6 in the same direction as that previously switched on and incoming sterile air injected in the direction of sterile room 1.
  • the sterilizing agent is injected centrally into the water vapor, which is provided in the form of a tube.
  • the total flow of sterile air, steam and sterilizing agent can be accelerated by conically narrowing the channel 2 leading to the sterile room 1, which leads to a higher turbulence of the flow.
  • the steam is supplied to the nozzle by means of a pressure reducing valve and a subsequent steam quantity control, and the sterilizing agent is supplied to the nozzle from a sterilizing agent supply or the supply container 12 which is kept under constant pressure and contains the amount of sterile agent required for the pre-sterilization.
  • This pressure and quantity control of steam and sterilizing agents is important in order to meet the requirements and regulations for perfect pre-sterilization.
  • the supply of sterile air is briefly interrupted for about 15 to 30 seconds in order to allow the steam-sterilizing agent mixture to flow back to a certain degree against the sterile-air filter 6 and also to expose it to the sterilizing agent. Furthermore, at least during the start-up phase of the pre-sterilization, the sterile filter 6 is also sprayed with sterilizing agent on the air inflow side.
  • Pre-sterilization takes a relatively short time of only about 12 up to 20 minutes depending on the machine type and size in Claim, then maintaining the sterile air supply but switched off steam and sterilizing agent supply the sterile room 1 is blown out, so that it also dries and then the packaging machine is set in the conventional way becomes.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)

Claims (12)

  1. Machine d'emballage qui fonctionne de manière aseptique constituée par un segment de traitement (VS) équipé d'éléments de traitement du lé de matériau d'emballage dans un espace stérile (1) ouvert partiellement par rapport à l'atmosphère qui est pourvu d'éléments pour l'amenée d'agent stérile et d'un raccord (2) pour un générateur d'air stérile (7) équipé d'une soufflante (4), d'un chauffage (5) et d'un filtre d'air stérile (6),
    caractérisée en ce qu'en aval directement derrière le filtre d'air stérile (6), il est placé une tuyère de mélange (3) reliée à une conduite d'amenée de vapeur et d'agent de stérilisation (8, 11) dans un conduit d'air stérile (2) qui débouche dans l'espace stérile (1), cette tuyère étant placée orientée en direction de l'embouchure (2') du conduit d'air stérile (2) dans l'espace stérile (1) et
    qu'un récipient de répartition d'agent de stérilisation (12) maintenu à une pression constante avec une soupape de réduction placée en amont (13) est placé dans la conduite d'amenée d'agent de stérilisation (11) et une soupape de réduction (9) avec un régulateur de quantité de vapeur placé en aval (10) est placée dans la conduite d'amenée de vapeur (8).
  2. Machine selon la revendication 1,
    caractérisée en ce que la tuyère de mélange (3) est configurée en forme de tuyère double avec un porte-vent central (3') et la conduite d'agent de stérilisation (11) qui part du récipient répartiteur (12) est raccordée à celui-ci.
  3. Machine selon la revendication 1 ou 2,
    caractérisée en ce qu'une résistance d'écoulement (15), comme un flambage de raccord, une calotte annulaire, un rétrécissement de conduite etc., est placée en aval à une distance derrière la tuyère de mélange (3).
  4. Machine selon l'une des revendications 1 à 3,
    caractérisée en ce que l'entraínement de la soufflante (4) est pourvue d'un relais de temporisation réglable (16).
  5. Machine selon l'une des revendications 1 à 4,
    caractérisée en ce qu'une tuyère d'agent de stérilisation (17), qui est en relation avec le récipient de répartition d'agent de stérilisation (12) par une conduite (17'), est placée côté afflux devant le filtre stérile (6).
  6. Procédé pour la préstérilisation d'espaces stériles de machines d'emballage qui fonctionnent de manière aseptique selon les revendications 1 à 5, un agent de stérilisation mélangé à de la vapeur d'eau comme agent porteur, en particulier du peroxyde d'hydrogène dissous dans de l'eau, étant pulvérisé, avant la mise en service de la machine d'emballage concernée, dans l'espace stérile (1) ouvert partiellement par rapport à l'atmosphère, maintenu à une légère surpression et contenant les éléments de traitement du lé de matériau d'emballage, le lé de matériau d'emballage étant introduit, et de l'air stérile filtré stérilement étant amené comme agent de refoulement pendant la préstérilisation,
    caractérisé par les étapes de procédé suivantes:
    a) Les éléments de traitement encore chauds qui se trouvent dans l'espace stérile (1) sont amenés à une température inférieure à 120° C avant le début de la préstérilisation;
    b) Le mélange de vapeur d'eau et d'agent de stérilisation est causé par une tuyère (3) à laquelle les deux composants sont amenés;
    c) Le mélange de vapeur d'eau et d'agent de stérilisation est injecté en direction de l'espace stérile (1) à un seul endroit en aval directement derrière le filtre stérile (6) dans la même direction que l'air stérile qui arrive;
    d) L'amenée de la vapeur à la tuyère (3) se fait par une soupape de réduction et un réglage subséquent de la quantité de vapeur et l'amenée de l'agent de stérilisation à la tuyère (3) se fait à partir d'une réserve d'agent de stérilisation maintenue à une pression constante et
    e) pendant la phase de démarrage de la préstérilisation, l'amenée d'air stérile est interrompue temporairement en amont vers le filtre d'air stérile (6) pour une production partielle de courant de retour du mélange de vapeur d'eau et d'agent de stérilisation expulsé par la tuyère.
  7. Procédé selon la revendication 6,
    caractérisé en ce que l'agent de stérilisation est injecté de manière centrale dans la vapeur d'eau expulsée sous forme de tuyau.
  8. Procédé selon la revendication 6 ou 7,
    caractérisé en ce que le filtre stérile (6) est aussi pulvérisé d'agent de stérilisation côté afflux d'air au moins pendant la phase de démarrage de la préstérilisation.
  9. Procédé selon l'une des revendications 6 à 8,
    caractérisé en ce que le mélange de vapeur d'eau, d'agent de stérilisation et d'air stérile est guidé par un rétrécissement de courant (15) avant l'entrée dans l'espace stérile (1).
  10. Procédé selon l'une des revendications 6 à 9,
    caractérisé en ce que l'espace stérile (1), y compris les éléments de traitement du lé de matériau d'emballage qui s'y trouvent, est réglé pour la préstérilisation à une température au-dessous de la température de condensation du mélange de vapeur et d'agent de stérilisation, de préférence à une température de 40 à 80° C.
  11. Procédé selon l'une des revendications 6 à 10,
    caractérisé en ce que l'espace stérile (1) et les éléments de traitement qui s'y trouvent sont séchés avant le début de la préstérilisation proprement dite par de l'air stérile amené par le filtre stérile (6) et sont maintenus à température.
  12. Procédé selon la revendication 11,
    caractérisé en ce que l'air stérile est amené au séchage à une température de l'ordre de 40 à 80° C.
EP00993397A 1999-12-14 2000-12-11 Machines d'emballage a fonctionnement aseptique et procede de leur presterilisation Expired - Lifetime EP1152946B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19960155 1999-12-14
DE19960155A DE19960155A1 (de) 1999-12-14 1999-12-14 Verfahren und Einrichtung zum Vorsterilisieren von Sterilräumen an Verpackungsmaschinen
PCT/DE2000/004415 WO2001044053A1 (fr) 1999-12-14 2000-12-11 Machines d'emballage a fonctionnement aseptique et procede de leur presterilisation

Publications (2)

Publication Number Publication Date
EP1152946A1 EP1152946A1 (fr) 2001-11-14
EP1152946B1 true EP1152946B1 (fr) 2004-06-30

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EP00993397A Expired - Lifetime EP1152946B1 (fr) 1999-12-14 2000-12-11 Machines d'emballage a fonctionnement aseptique et procede de leur presterilisation

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US (1) US6622457B2 (fr)
EP (1) EP1152946B1 (fr)
DE (2) DE19960155A1 (fr)
ES (1) ES2218282T3 (fr)
WO (1) WO2001044053A1 (fr)

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US6622457B2 (en) 2003-09-23
ES2218282T3 (es) 2004-11-16
US20020134051A1 (en) 2002-09-26
EP1152946A1 (fr) 2001-11-14
DE50006955D1 (de) 2004-08-05
DE19960155A1 (de) 2001-06-21
WO2001044053A1 (fr) 2001-06-21

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