JP2008516860A - Method and system for producing hermetically sealed viscous products - Google Patents

Abstract

The present invention relates to a method for producing a hermetically sealed viscous product at high speed, which comprises:
Unwinding the first lower film at a high speed, in particular at a speed of 20-50 m / min;
Depositing a predetermined amount of a viscous product on the first film at regular intervals;
A second upper film is attached to the first film on which the viscous product is deposited, and the first film and the upper film are resistant to each other in such a manner that each predetermined amount of the viscous product is enclosed in an individual package. Tightly assembling.

Description

  The present invention relates to a method and system for producing a hermetically sealed viscous product at high speed. The invention further relates to a product obtained by a method for producing a filled product.

  In the description of the invention, a viscous or soft product is understood to mean a product having a higher viscosity than the viscosity of liquid water. A preferred form of embodiment of the present invention is an indicator for determining whether a substance is in a state suitable for consumption or use, wherein changes over time and temperature are subject to changes in the substance. It relates to the manufacture of similar indicators. When the substance is no longer suitable for consumption or use, the light characteristics of the indicator change. Viscous products that fall within the structure of the indicator are particularly rich in water and / or contain microorganisms. However, the present invention is not limited to this application. The present invention relates to all types of viscous products, which can be, for example, medicines, cosmetics or health products.

  Known manufacturing methods for filled viscous products cannot be manufactured at high speed and at an appropriate cost.

  The present invention overcomes these disadvantages.

For this purpose, the method according to the invention, which enables the high-speed production of viscous products hermetically sealed in individual packages,
Unwinding the first lower film at high speed, particularly at a speed of 20-50 m / min;
Depositing a predetermined amount of viscous product on the first film at regular intervals;
Attaching a second so-called upper film to the first film on which the viscous product has been deposited;
Assembling the first film and the upper film in a tight manner so as to enclose each predetermined amount of the viscous product.

  In this way, it is possible to produce individual doses of filled viscous products using simple means, this production being carried out at high speed. If multiple doses of viscous product are deposited simultaneously on the first film perpendicular to the unwinding direction of the film, the speed is even higher.

  In one embodiment, the viscous product is an active gel rich in water and / or containing microorganisms.

  In one embodiment, the filled product is in a thin layer, for example, a layer having a depth of 0.03 mm to 2 mm.

In one embodiment, the method includes molding each package, the molding step comprising:
Cutting out according to the defined shape of each package;
Pre-cutting according to a predetermined shape of each package;
An operation of cutting out a predetermined number of packages;
And an operation for pre-cutting a predetermined number of packages.

  Precut is understood here to mean partly cutting or weakening the tear line, thereby facilitating subsequent manual cutting.

  In one embodiment, the step of forming the filled product is performed using rotating cylinder means fitted with blades.

  In one embodiment, prior to depositing a predetermined amount of viscous product, a cavity for receiving the viscous product is formed in the lower film and / or before attaching the upper film to the lower film, , Deformed into a non-flat shape to accept each predetermined amount of viscous product.

Because of these deformations, the volume of the viscous product encapsulated between the two films can be relatively important without compromising the correct attachment of the upper film to the lower film.
However, the field of application of the present invention further relates to manufacturing for packaging the lower and upper films without deformation.

  In one embodiment, the deformation of the first and second films is performed by thermoforming and / or pressing and / or embossing.

  In a preferred embodiment, after depositing a predetermined amount of viscous product, the viscous product is cooled to make it resistant to the constraints that it receives at the moment of applying the second film.

  In one embodiment, the method includes using at least one mouth nozzle to continuously deposit the viscous product.

  In one embodiment, the method includes depositing a predetermined amount of a viscous product on the first film by using a heliographic cylinder.

  In one embodiment, the step of tightly assembling the first and second films is performed by adhesion and / or heat sealing and / or ultrasound.

  In one embodiment, the step of depositing at least one adhesive substance by means of at least one nozzle and / or a flexographic cylinder is provided.

In one embodiment, the step of tightly assembling the first and second films comprises:
Positioning the second film relative to the first film;
Pressing the second film on the first film outside the zone containing the viscous product.

  In one embodiment, shaping is performed simultaneously with pressurization.

  In one embodiment, the lower film is coated with an adhesive on the opposite side of the surface on which the viscous product is deposited so that the filled product constitutes an adhesive label, particularly a self-adhesive label.

  In one embodiment, the lower film is integral with the backing film, and the surface of the backing film is partially ready for temporary assembly of the first film to the backing film, and others. This part is in a state where almost all of the adhesive can remain on the first film after being separated from the backing.

  In one embodiment, the individual packages are tight when manufactured, permeable and / or openable when used.

  In one embodiment, after depositing a predetermined amount of viscous product, an electric field is applied to these products to prevent their spreading.

The present invention is also a system for producing a hermetically sealed viscous product at high speed, comprising:
Means for unwinding the first lower film at a high speed, in particular at a speed of 20-50 m / min;
Means for depositing a predetermined amount of viscous product on the first film at regular intervals;
Means for attaching the second upper film to the first film on which the viscous product is deposited;
The present invention relates to a system including means for tightly assembling a first film and an upper film in such a manner that each predetermined amount of viscous product is enclosed in an individual package.

  In one embodiment, the viscous product is an active, water-rich gel and / or contains microorganisms.

  In one embodiment, the filled product is in a thin layer, eg, a layer having a thickness between 0.03 mm and 2 mm.

  In one embodiment, the system includes means for shaping each package, the shaping means being means for cutting or pre-cutting according to a predetermined shape of each package and / or means for cutting a predetermined number of packages or Means to pre-cut it.

  In one embodiment, the system includes a means for forming a cavity for receiving the viscous product in the lower film and / or a non-flat shape for each predetermined amount of viscous product prior to depositing the upper film on the lower film. Means for providing on the upper film.

  In one embodiment, the deformation means of the first and / or second film comprises thermoforming means and / or squeezing means and / or embossing means.

  In one embodiment, the system includes means for cooling after a predetermined amount of viscous product has been deposited on the first film, and the cooling temperature is imposed when the viscous product deposits the second film. The temperature will withstand the constraints.

  In one embodiment, the system includes at least one mouth nozzle for continuously depositing the viscous product.

  In one embodiment, the system includes at least one heliographic cylinder for depositing a predetermined amount of viscous product on the film.

  In one embodiment, the means for tightly assembling the first and second films comprises adhesive means and / or heat sealing means and / or ultrasonic type means.

  In one embodiment, the system includes at least one nozzle and / or flexographic cylinder for depositing at least one adhesive material on the first and / or second film.

In one embodiment, the means for tightly assembling the first and second films is:
Means for positioning the second film relative to the first film;
Means for pressing on the first film outside the zone containing the viscous product on the second film.

  In one embodiment, the means for shaping is such that shaping and pressing can be performed simultaneously.

  In one embodiment, the means for shaping the filled product comprises a rotating cylinder fitted with a blade.

  In one embodiment, the system includes means for coating the opposite side of the lower film surface on which the viscous product is deposited with an adhesive such that the packaged product constitutes an adhesive label, particularly a self-adhesive label.

  In one embodiment, the system includes means for integrating the lower film with the backing film, the surface of the backing film being partially ready for temporary assembly of the first film to the backing film. The other part is in a state in which almost all of the adhesive can remain on the first film after being separated from the backing.

  In one embodiment, the individual packages are tight when manufactured, permeable and / or openable when used.

  In one embodiment, the system includes means for depositing a predetermined amount of viscous product and then applying an electric field to the product to prevent its spreading.

  An example of an embodiment of the present invention will be described with reference to the following figures, but not limited thereto.

  FIG. 1 shows a schematic diagram of the various steps of the production method according to the invention. The lower film 10 is unwound at a speed of 20 to 50 m per minute. The width w of the polypropylene or polyethylene type film used is 100 to 330 mm. The film is permeable. This film is covered with a backing film 11 or a silicone backing material by forming a self-adhesive composite. The composite can be assembled upstream of the same production line, which includes covering the silicone backing film with an adhesive.

  A first step A for coating the film 10 with the adhesive 12 is performed. The adhesive is deposited at a predetermined temperature, in the above example, 100 ° C. Subsequently, a second step B of reticulating this layer of adhesive 12 is performed using, for example, UV bulb 14 means. The action of UV (U.V.) is bactericidal at a temperature of 100 ° C., similar to the coating step. Film sterilization can occur when viscous products such as cosmetics that are sensitive to potential contamination are deposited, or when it is desired to reduce the number of microorganisms contained within the label that forms the storage status indicator of the substance, It is particularly useful.

  Of course, it is also possible to use various types of adhesives, in particular adhesives that do not require reticulation with UV light. As yet another variation, it is possible to use two adhesives with different properties in order to combine the advantages of the two types of adhesives. For example, use a first adhesive featuring strong cohesion around the edge of the package and a second adhesive featuring strong tack closer to the gel. Can do. The second adhesive can also be used to hold the gel on the first film 10. It is noted here that the “tacking force” of the adhesive indicates its instantaneous adhesion capability.

  Subsequently, step C, in which individual doses (predetermined amounts) of gel 16 are deposited, is carried out using foil nozzle 18 means. Each nozzle 18 deposits a dose in a significantly plane parallel format. The deposited gel is sufficiently viscous so that it does not flow out immediately. It is possible to select the temperature when depositing the gel in order to prevent it from flowing out. The number of foil nozzles spaced across the width of the lower film 10 determines the number of gel doses 16 deposited on the lower film of a width. Parameters such as length, width, thickness, etc. that define each predetermined amount 16 are controlled using the foil nozzle 18. These nozzles are manufactured and distributed by, for example, North American company Nordson Corp.

  Subsequently, the cooling step D is performed. The purpose of this step is to increase resistance to mechanical constraints within a given amount of gel 16. This step is performed by circulating a cold gas, for example by opening a liquid gas supply valve such as liquid nitrogen. Nitrogen is a natural inert gas and greatly reduces the risk of contamination. This gas is injected close to the gel, for example using a conical nozzle 20.

  Liquid nitrogen must be injected by the conical nozzle 20 so that it evaporates the moment it leaves the nozzle, so that the temperature of the gas stream (nitrogen and air) around the gel is close to −60 ° C. Controlled and maintained. The action of gaseous nitrogen makes it possible to avoid the disadvantages that would have arisen if it remained in the liquid state, in particular to avoid adhesive and gel modification and lower film weakening.

  To ensure that nitrogen is in a gas phase when in contact with the gel and to control the enclosure temperature described below, the diameter and height of the conical nozzles, the opening angle and direction, the nitrogen in these nozzles Several parameters can be manipulated, such as pressure and flow rate, and air regeneration flow rate.

  This cooling step takes place inside an enclosure (not shown) whose temperature is adjusted, as will be explained below. In practice, if not adjusted, the enclosure will gradually cool, causing the risk that nitrogen will remain in a liquid state inside the enclosure. This is why a ventilation extractor is also used to adjust the temperature of the enclosure.

  This cooling step is not necessary, especially in the specific case where the gel depth is not very thick and / or the gel is very viscous. Alternatively, cooling is performed by cooling a horizontal plate located below the lower film prior to gel packaging. As a further alternative, the cooling is carried out using a cylinder on which the lower film unwinds, in which the mixture, in particular a mixture of water and glycol, circulates, the circulation flow rate of this mixture and the diameter of the cylinder being Allows adjustment of the dynamic characteristics of the cooling.

  Instead of or in addition to cooling, it is possible to stop it from spreading by applying an electric field to the gel. It is also possible to prevent gel spreading by applying pressure in advance or by applying a coating that highlights and defines the boundaries of the gel dose profile. This relief is performed with ink or with an adhesive that is used when the film 10 and the upper film are assembled later.

  The subsequent step is a step E of attaching and positioning a second film, ie the upper film 22 on the first film 10 so as to enclose a predetermined amount of gel 16. In this example, the upper film 22 has the same properties as the lower film. Therefore, it is still permeable.

  During this step, the upper film 22 is subjected to the minimum pressure necessary to contact and adhere to the lower film.

  The upper film is first slowed down and fed into the gap between the two guide rollers 21 and 23 to stretch it. Stretching of the upper film 22 is necessary during the deposition of the upper film on the lower film 10 to avoid undesired displacement of this film relative to the lower film, such displacement causing wrinkle formation. Sometimes.

  The positioning cylinder 24 allows the upper film 22 to be deposited on the lower film 10 at a low pressure. If the pressure applied in this way is insufficient, the upper film 22 will not come into contact with the lower film, and if it is too high, wrinkles will occur on the film 22 or warp in the gel under pressure. May occur. This cylinder 22 is coated with a foam having thickness and hardness parameters that allow the control of the pressure exerted by the cylinder in particular.

  Subsequently, a sealing and cutting step F is performed using the cutting cylinder 26 and the pressure cylinder 27 between which the films 10, 11, and 22 and the dose 16 are unwound. The rotating cutting cylinder 26 is fitted with a plurality of cutters 28 adapted to the shape of the gel dose package. The pressure applied to the Linda 27 by the cylinder 26 seals the upper film on the lower film around the gel and cuts out the package (ie films 10 and 22) without cutting the backing 11 Selected.

  The squeezing cylinder serves to allow a strong pressure to be applied by the cylinder 26 without deforming the films 10, 11, and 22 with pressure.

  The cutting cylinder 26 rotates at a speed adjusted according to the unwinding speed of the lower film. A detection cell (not shown) makes it possible to position the cutter 28 on the cylinder 26 so as to ensure the synchronization of this deposition and cut-out, ie the desired positioning of the blade with respect to the gel dose of interest. Providing an instruction signal for depositing.

  FIG. 2 represents the cutting cylinder 26. The surface 260 of the cylinder is covered with a layer of foam of a determined thickness and hardness, except for the cutting pattern 28. Each cutting pattern 28 includes a cutting thread 30 that designs the desired cut shape or pre-cut shape to be obtained.

  Inside the shape defined by each cutting thread 30 is a foam liner 32. Foam liner 32 is of the same nature and thickness as the foam covering cylinder surface 260 in this example. This thickness is such that when the foam is not sandwiched in the gap, the cutting line is below the free surface of the foam. In other words, the height of the blade (knife) is lower than the depth of the unconfined foam. When a zone of the cylinder 26 contacts the film 22, pressure is applied to the cylinder 27 and the foam covering the cylinder surface 260 is coupled with the layer 32 so that the correct pressure is applied to seal the two films. Guarantee. When this pressure is applied, the foam changes its shape, shrinks (compresses), thereby exposing the cutting thread, which is then in contact with the film and at the same time the cylinder in contact with the film. Cutting or precutting is performed on the 26 and 27 bus bars.

  In order to avoid collapsing the gel, each liner 32 has a hollow 34 in its center for receiving a gel dose arrangement when pressure is applied.

  During this sealing step, it is advantageous to heat the cylinder in order to improve the “temporary” and / or dynamic tack properties of the adhesive.

An adhesive can be deposited on the entire surface of either the lower film or the upper film, or on two layers of the film, which should be done before the viscous liquid is deposited. Adhesion efficiency depends on the total amount of adhesive deposited and its original nature. The amount of said adhesive usually does not exceed 30 g / m ² .

  As a variant, thermal welding and / or ultrasonic welding are used.

  Thermal welding and / or ultrasonic welding can also be used instead of or as a supplement to bonding. If this type of weld is used as an adhesive supplement, the weld width can be reduced around the dose profile, which allows for sustained high-speed production, in which case the weld It is possible to improve the tight seal and / or increase the pressure on the gel in the package and thus its thickness.

  When thermal welding and ultrasonic welding are used, the speed of each welding technique is different, so that thermal welding is transverse to the film unwinding direction and ultrasonic welding is in the same direction as film unwinding Is preferred.

  The quality of the seal depends on the sealing temperature, ie the vibration frequency in the case of ultrasonic welding, the speed at which the film is unwound, the width of the weld and the thickness of the film. In the case of thermal welding or ultrasonic welding, it is specified here that the lower film is not pre-lined with a silicone film (composite type) but is lined at the end of the production line.

  Alternatively, films 10 and / or 11 and / or 22 have imprints made on line or pre-made.

  Still alternatively, step F may be performed in two substeps. The first sub-step consists of applying a sealing pressure and the second sub-step consists of making a cut or pre-cut.

  From the tests carried out, it was possible to conclude that:

  Packaging quality, especially gel size, gel thickness, linear contour of viscous product dose, label sealing quality is consistent. During step D, good temperature stability is achieved.

  The following equipment was used to perform these tests.

Flexographic printing type, MARK ANDY 4000 brand horizontal winding and unwinding machine equipped with film unwinding order,
A module for depositing an adhesive, NORDSON Curtin Coated BC 70;
A module for depositing adhesive, NORDSON EP11;
A cold tunnel (enclosure) with two continuous extractors and one air inlet to control the temperature;
One spray rail for liquid nitrogen having two rows of two NPT nozzles located 12 mm from the height of the track of the film;
A cylinder 24 coated with a 1 mm layer of foam;
Tension rollers 21 and 23;
A cutting roller 26 covered with a 2 mm layer of foam on the bonding zone and a pressure cylinder 27 are provided.

The raw materials used are
260 mm wide self-adhesive composite, comprising lower films 10, 11 molded by Raflatac HD70 / RH01 / PP30,
The upper film 22 is of the type OPP Mobile 52μ SBWR,
The adhesive is of the HENKEL Hot Melt UV type PS 4110 brand.

  The gel is deposited at 28 ° C., its viscosity is 4.8 pa / sec and its density is 1.0404.

  The temperature of the compressed liquid nitrogen is -196 ° C. This liquid nitrogen was supplied from AIR LIQUIDE with a 4000 liter movable equipment OPEX.

  The manufacturing parameters are as follows.

  The number of tiles (doses) across the width is four.

  The thickness of the gel tile is 450μ.

  The size of each tile is 30 mm × 25 mm.

  The size of the completed label is 38 mm x 38 mm.

The adhesive coating is applied on the lower film at 20 g / m ² and a width of 250 mm.

  The temperature in the cold tunnel is adjusted to −40 ° C. to −60 ° C. depending on the viscosity of the gel.

  The temperature of the gel surface and the adhesive after passing through the tunnel is 0 ° C to 4 ° C.

  The temperature of the production tunnel is 22 ° C. ± 5 ° C.

  Tests with mouth nozzles and industrial adhesives enable the deposition of liquid viscous products, especially water-rich gels containing, for example, microorganisms, using mouth nozzle technology for adhesive application We were able to verify the sex. These tests were able to verify the stability of the product on a film that was unwound at least 40 meters per minute. This coating system is viscous and is particularly suitable for the deposition of liquids containing water rich media. This system does not destroy the microorganisms contained within the label and does not significantly change their behavior.

  Thus, using this technical means it is possible to work at high speed with one adjustable foil nozzle. The foil, which is an internal part of the nozzle, determines the volume and quality of the cut piece after deposition. Accumulation using a suction nozzle can improve accuracy, which also allows pressure control and avoids emulsification.

  It is also possible to adjust the dose size by manipulating the foil shape on the one hand and the opening time and pressure of the foil in the base on the other hand depending on the unwinding speed of the film.

  Deposition tests on viscous products, especially water-rich gels, were performed using heliographic cylinders. These tests made it possible to use a gravure printing apparatus to verify the deposition of viscous products, in particular gels rich in water, for example containing microorganisms, on a film that is unwound at 50 m / min. The minimum thickness for this deposition is 300 microns.

  Deposition using gravure printing allows not only the perfect application of the desired amount on the film unwinding at high speed, but also the realization of this deposition with high precision within the contour of the deposit.

  In one embodiment, a system for injecting a neutral gas is adapted to reduce the problem of product sticking to the heliography cylinder and thus increase the deposition thickness. This layer could reach a considerable thickness, for example 2 mm.

  A tight seal test was also performed by bonding around a viscous liquid or the water-rich gel deposited above. By this conducted test,

It is possible to select and verify adhesives that do not denature viscous liquids, especially water-based gels, especially those that do not significantly inhibit microbial growth and can be deposited in the gel,
It has become possible to select and verify an adhesive that allows a complete hermetic seal that will not be compromised if it contains significant water.

  Thus, for example, a polyurethane adhesive that has a strong tacking force and a strong adhesive force, maintains an adhesive force that is stable and unaffected by water over time, and ensures sufficient water / airtightness (PU) and UV and non-UV hot melt adhesives were selected.

  It was verified that a cold flexographic printing plate could be used to apply PU adhesive and cover the entire surface, thereby ensuring the efficiency of the final hermetic seal. That is, hot melt adhesives can be easily applied using a “curing coated” type coating system developed by NORDSON CORP.

  The PU adhesive is a two-component consisting of a resin and a curing agent, which is mixed when it is necessary to use it. PU adhesives have been approved by the US “Food and Drug Administration” to be compatible with food use, and now they are actually film composites such as “chips” (aluminum and polypropylene Used in packaging). In addition, they are compatible with ink.

  Hot melt adhesives are rubber or acrylic based and therefore do not pose a danger to human health or the environment.

  Thus, the tests performed provide the selected adhesive with a perfectly permeable, tight seal that retains the properties of long-term stable and viscous liquids such as water-rich gels containing microorganisms. Confirmed to do.

By performing a hermetic seal test by performing ultrasonic welding around the water rich gel deposited above,
Verification that ultrasonic welding ensures a perfect tight seal, including contact times of less than 0.1 seconds, when the film is unwinding at high speeds
Verification that the held flexible plastic film can be ultrasonically welded,
It has become possible to verify that ultrasound does not denature the texture and properties of viscous products, especially water-rich active gels containing, for example, microorganisms.

  A contact time of less than 0.05 seconds when using an ultrasonic head to perform a transverse weld is not only sufficient to ensure a perfect and complete hermetic seal, but also a coating and / or barrier. It has also been particularly confirmed to allow welding of flexible films with a thickness of 20 to 80 microns with a composite layer.

  As a result of exposing a packaged and sealed product by ultrasound at a frequency of 20 kHz, it has been demonstrated that it has no effect on the texture and properties of viscous products, especially water-rich gels, for example contained within the gel It has been shown that the mortality rate in the number of microbial organisms is low.

  Feasibility studies have been conducted on incorporating final molding directly into the production line for packaging in the form of viscous or non-viscous labels. Taking into account that viscous liquids, especially water-rich gels, especially gels containing microorganisms, are susceptible to pressure, during unwinding, cutting, final finishing, and other passing processes through the back pressure cylinder It is important to fully control the pressure so that it is stable and as low as possible.

After consideration, the possibility of incorporating the molded module into the adhesive label embodiment was verified.
Label cutting, final finishing and hence final shaping are carried out using modules that can be incorporated into high-speed manufacturing processes of products containing viscous liquids, especially gels that are rich in water as thin layers or deposited thickly . The gel itself may contain microorganisms or may not contain microorganisms.

The environment associated with the application considered in this example. To optimally deposit a viscous liquid in a tightly sealed label
Evaluate the process's influence on the texture and properties of viscous liquids or water-rich gels on the mechanical kinetic properties of this process, e.g., the constraints imposed on microorganisms that may be contained within the gel. Specific quality control, adapted to monitor, is required and this control is performed between each step of the process,
The speed is so fast that it requires equipment for continuous preparation of gels related to other manufacturing tools to ensure sufficient flow,
It is noted that it is necessary to protect sensitive parts, especially via laminar flow, as they are more susceptible to contamination with the higher proportion of water in the gel.

  Whatever the form of embodiment of the present invention, there are many fields of application for this type of manufacturing system, in any activity field where viscous liquids need to be packaged in large quantities and at as low a price as possible. Involved.

  The fields of time-temperature integrators, level crossing controls, cooling indicators are industries in which this type of industrial tool is particularly relevant.

  In the cosmetics industry, review of production lines to meet the demands of increasingly nomadic customers and to respond to regulatory developments in the field for the development of small or minimal doses I have to do it.

  Indeed, the cosmetic industry has a future legal obligation to mark the date after opening on the product for health and safety reasons, regardless of the inherent stability of the product.

  Individual packaging of doses meets both these requirements. These applications also make it possible to produce very low-cost samples for packaging creams or perfumes that can be distributed inside newspapers.

  The industry of packaging ambiance perfume into small formats can benefit not only from high performance and high productivity, but also from this new form of packaging that makes up adhesive labels.

  More generally, particularly in the health field, the technical functions of the present invention can be applied to packaging in the form of patches, patches, bandages, or all other active substance labels. Most particularly, the application areas of manufacture of smoking cessation patches, contraceptive patches, wound dressings are noted.

  For example, a rapid detection kit for cell culture environments that can reveal the presence of pathogenic microorganisms (detection of Listeria monocytogenes, Salmonella), more commonly a developer kit used in the medical field, or a reaction component or organism The company that manufactures the reaction components is associated with these manufacturing tools.

  Of course, to be able to distribute cosmetic doses, fragrances, or other products, it is necessary to provide a means to open each dose or allow its diffusion. These means are, for example, permeable films. In this case, each dose is packaged by providing two layers comprising one permeable film and one impermeable film (against gas and evaporating water) that is detectable against diffusion. Can be used.

Fig. 2 is a schematic diagram representing a system for carrying out the steps of the method according to the invention. It is a figure showing the cutting cylinder which is a part of the system shown in FIG.

Claims (36)

A method for producing a hermetically sealed viscous product at high speed,
Unwinding the first lower film (10) at high speed, in particular at a speed of 20-50 m / min;
Depositing a predetermined amount (16) of the viscous product on the first film (10) at regular intervals;
Attaching a second upper film (22) to the first film (10) on which the viscous product has been deposited;
A step of tightly assembling the first film (10) and the upper film (22) in such a way as to enclose each predetermined amount (16) of a viscous product in an individual package (17).   The method of claim 1, wherein the viscous product is an active gel rich in water and / or comprising microorganisms.   The method according to claim 1 or 2, wherein the filled product is in a thin layer, for example a layer having a thickness of 0.03 mm to 2 mm. Forming each package (17), said forming step comprising:
Cutting according to a predetermined shape of each package (17);
An operation of pre-cutting according to a predetermined shape of each package (17);
An operation of cutting out a predetermined number of packages (17);
The method according to one of claims 1 to 3, comprising at least one of the operations included in the group comprising an operation of pre-cutting a predetermined number of packages (17).   Prior to the deposition of a predetermined amount (16) of the viscous product, a cavity for receiving the viscous product is formed in the lower film (10) and / or the upper film (22) is replaced with the lower film (22). The method according to one of the preceding claims, wherein prior to attaching to 10), the upper film (22) is deformed into a non-flat shape for each predetermined amount (16) of the viscous product. .   6. The method according to claim 5, wherein the deformation of the first and / or the second film is performed by thermoforming and / or pressing and / or embossing.   The deposit according to one of the preceding claims, wherein after depositing a predetermined amount of viscous product, they are cooled to be resistant to the constraints experienced when applying the second film (22). the method of.   The method according to one of the preceding claims, comprising using at least one mouth nozzle (18) for depositing the viscous product.   The method according to one of the preceding claims, comprising depositing a viscous product in a plurality of predetermined amounts on the first film (10) by using a heliographic cylinder.   The method according to one of the preceding claims, wherein the tightly assembling of the first and second films is performed by gluing and / or heat sealing and / or ultrasound.   11. A method according to claim 10, comprising depositing at least one adhesive substance (12) by at least one nozzle means and / or a flexographic cylinder means. The step of tightly assembling the first and second films comprises:
Positioning the second film (22) relative to the first film;
Pressing the second film (22) on the first film (10) outside the zone containing the viscous product.   The method according to claim 4 and 12, wherein the shaping is performed simultaneously with the pressing.   The method according to claim 4 or 5, wherein the step of shaping the filled product is carried out by means of a rotating cylinder (26) fitted with blades.   The lower film (10) according to one of the preceding claims, wherein the lower film (10) is coated with an adhesive on the opposite side of the surface on which the viscous product is deposited so that the packaged product constitutes an adhesive label. The method described.   The lower film (10) is integrated with a backing slip (11), and a part of the surface of the backing film (11) is temporarily attached to the backing film (11) of the first film (10). In a state where it can be assembled and after the other part is separated from the backing (11), almost all of the adhesive can remain on the first film (10). The method of claim 15, wherein the condition is. A high-speed production system for hermetically sealed viscous products,
Means for unwinding the first lower film (10) at a high speed, in particular at a speed of 20 m / mn to 50 m / mn;
Means for depositing a predetermined amount of (16) viscous product on the first film at regular intervals;
Means for attaching a second upper film (22) to the first film (10) on which the viscous product has been deposited;
A system comprising means for tightly assembling the first film (10) and the upper film (22) in such a manner that each predetermined amount (16) of a viscous product is enclosed in an individual package (17).   18. A system according to claim 17, wherein the viscous product is an active gel rich in water and / or contains microorganisms.   19. A system according to claim 17 or 18, wherein the filled product is in a thin layer, for example a layer having a thickness of 0.03 mm to 2 mm.   Means for shaping each package (17), said shaping means comprising means for cutting or precutting according to a predetermined shape of each package and / or means for cutting or precutting a predetermined number of packages (17). The system according to one of claims 17 to 19.   Means for forming a cavity in the lower film (10) for receiving the viscous product before depositing a predetermined amount (16) of the viscous product, and / or the upper film (22) in the lower film (10). 21. System according to one of claims 17 to 20, comprising means for making the upper film (22) non-planar for each predetermined amount of viscous product prior to being attached to.   22. A system according to claim 21, wherein the deformation means of the first and / or the second film comprises thermoforming means and / or squeezing means and / or embossing means.   Means for cooling a predetermined amount (16) of viscous products after they have been deposited on the first film (10), wherein the temperature of the cooling is such that the viscous product is in contact with the second film (22). 23. A system according to one of claims 17 to 22, wherein the temperature is such that it can withstand the constraints experienced when depositing.   24. System according to one of claims 17 to 23, comprising at least one mouth nozzle (18) for depositing the viscous product.   25. A system according to one of claims 17 to 24, comprising at least one heliographic cylinder for depositing a predetermined amount (16) of the viscous product on the first film.   26. A system according to one of claims 17 to 25, wherein the means for tightly assembling the first and second films comprises an adhesive means and / or a heat sealing means and / or an ultrasonic means.   27. System according to claim 26, comprising at least one nozzle and / or a flexographic cylinder for depositing at least one adhesive substance (12) on the first and / or the second film. Means for tightly assembling the first and second films;
Means for positioning the second film (22) relative to the first film;
28. System according to one of claims 17 to 27, comprising means for pressurizing the second film (22) on the first film (10) outside the zone containing the viscous product.   29. A system according to claim 20 and 28, wherein the means for shaping allows simultaneous implementation of molding and pressing.   22. A system according to claim 20 or 21, wherein the means for shaping the packaged product comprises a rotating cylinder (26) fitted with blades.   31. A means for covering the lower film (10) with an adhesive on the opposite side of the viscous product deposited surface so that the packaged product constitutes an adhesive label. The system according to one item.   Means for integrating the lower film (10) with the backing film (11), the surface of the backing film (11) being partly part of the backing film (11) of the first film (10). In a state where temporary assembly is possible, and after the other part is separated from the backing (11), almost all of the adhesive remains on the first film (10). 32. The system of claim 31, wherein is ready.   Method according to one of the preceding claims, wherein the individual packages (17) are tight when manufactured and are permeable and / or openable when used.   34. A method according to one of claims 1 to 16 and 33, wherein after depositing a predetermined amount (16) of viscous products, an electric field is applied to these products to prevent their spreading.   33. System according to one of the claims 17 to 32, wherein the individual packages (17) are tight when manufactured, permeable and / or openable when used.   36. A system according to one of claims 17 to 32 and 35, comprising means for applying an electric field to the products after depositing a predetermined amount (16) of these products to prevent their spreading.

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