EP3309093A1 - Multi-chamber film bag and its use - Google Patents

Abstract

The invention relates to a multi-chamber film bag (10) for a multi-component inorganic foam system, with at least two liquid-tight separated chambers (16, 18), wherein one of the chambers (16, 18) with a powdery inorganic component (20), optionally Base of gypsum or cement mortar, and another chamber with a, optionally for the component (20) reactive, powdery foaming component (22) is filled. A separator (24) separates the chambers (16, 18) in a first liquid-tight manner from one another, and in a second state, provides fluid communication between the chambers (16, 18). At least one of the chambers (16, 18) has an opening portion (14) which can be opened for discharging the foam system, wherein the chamber having the opening portion (14) has a preset residual volume for receiving a liquid.

Description

The invention relates to a multi-chamber film bag for a multi-component inorganic foam system and to the use of the multi-chamber film bag for packaging and / or processing of a multi-component inorganic foam system. Furthermore, the invention relates to the use of the multi-chamber foil bag in a process for producing a local foam, in particular an inorganic fire-resistant foam.

For fast closing of openings, such as fire protection ducts in the construction sector, a reactive material of two components is mixed on site and introduced into the opening. The reactive material should be stable until cured, so that it does not flow out of the opening again.

For two-component liquid resins such as polyurethane or epoxy resins, the stability is achieved by a corresponding adjustment of the viscosity of the material. The reactive components are presented separately in two-component cartridges and mixed with a static mixer. However, static mixers are not suitable for mixtures of powder components and liquids, because bridge formation occurs in the powder component, which prevents mixing in the static mixer by pressure.

From powder and liquid existing masses are therefore mechanically mixed together in an open vessel with the help of stirring rods or other mixing aids. The mixed mass can then be manually introduced into the opening to be filled and / or brought into the desired shape, or filled in other application aids such as dough presses and introduced into the opening.

If the powder is to be mixed in a closed container with the liquid, further aids such as balls are needed in a partially filled with air space. To empty the container, a substantially liquid consistency of the mixture is required.

Also known are liquid two-component casting resins, which are introduced into a two-chamber foil bag with clamp closure. Here, the potting resin is mixed by hand after removing the clamp closure and then poured, for example, in cable lugs.

Multi-component systems for the production of gypsum foams and / or cement foams by mixing in open vessels, for example, from EP 2 045 227 A known. This document describes a hydraulically setting composition for the production of inorganic fire-resistant or insulating local foams with a pH-neutral or alkaline hydraulic binder and a foaming component and a foam stabilizer, wherein the foaming component releases oxygen or carbon dioxide. The known inorganic fire protection systems, however, are difficult to introduce into openings and are often applicable only as a potting compound with elaborate formwork devices.

A simple and inexpensive packaging for quickly mixing the powdery and liquid components for an inorganic foam based on gypsum or mortar in a closed container is not known. Therefore, such inorganic foam systems, despite a relatively low price of materials, have not been customary in the marketplace.

The invention has for its object to provide a simple, user-friendly and cost-effective application form and packaging for rapid mixing of powder and liquids in a closed container, in particular for an inorganic foam based on gypsum or mortars for fire protection applications. The application form should allow the mixing of the components without expensive tools and allow the introduction of the foam system in tight and / or difficult to access openings.

This object is achieved by a multi-chamber foil bag according to claim 1. The invention further provides the use of the multi-chamber foil bag according to claim 10 for packaging and / or processing of an inorganic multi-component foam system, and a method for producing a local foam of an inorganic multi-component Foam system using the multi-chamber foil bag according to the invention with the features of claim 11.

Advantageous and expedient embodiments of the method according to the invention and of the film bag according to the invention are specified in the appended subclaims, which can optionally be combined with one another.

The invention provides a multi-chamber foil pouch for a multi-component inorganic foam system comprising at least two fluid-tight chambers, one of the compartments having a powdery inorganic component, optionally based on gypsum or cement mortar, and another chamber having one, optionally for the inorganic component of the reactive powdery foaming component is filled, and having a separating member which liquid-tightly separates the chambers in a first state and can provide flow communication between the chambers in a second state, at least one of the chambers having an opening portion for discharging the foam system can be opened, and wherein the opening portion having the chamber has a preset residual volume for receiving a liquid.

The multi-chamber foil pouch according to the invention makes it possible to provide a foil pack with fixed quantities of reactive components for the powdery inorganic foam system, predetermined by the pack. Thus, a misdosing by the user can be safely avoided and the mixture is ready for immediate use. It is particularly advantageous that a liquid necessary for the production of the foam, usually water, is introduced into the foil bag only when in use on site and thus the transport weight and transport volume are saved. Due to the specified filling volume, accurate metering of the liquid without measuring instruments is possible. The separating element of the multi-chamber foil bag can be easily opened without tools. By simply kneading the components, good mixing results can be achieved. To discharge the foam system no mixing and Auspresswerkzeuge are needed. Nevertheless, it remains possible to use the film bag according to the invention for discharging residual amounts with a known film dispenser for one-component masses.

The opening section for discharging the foam system provided in at least one of the chambers can be designed as a tapered outlet, for example as a nozzle tip, and thus enable a metering of the foam system into narrow and difficult-to-access openings. Furthermore, after the components have been mixed in the film bag, the foam system can already be in a firm pasty consistency in order to prevent the mass from flowing out of the openings to be filled.

The invention further provides a cost-effective and space-saving film packaging. During the mixing of the optionally reactive components in the film bag, dust formation from the powdery component can not occur. A contact of the user with the reactive foam components during mixing is excluded, so that a health hazard is avoided by reactive components. Finally, no cleaning of mixing tools and containers is necessary because the mixing of the components takes place within the film packaging.

Although the invention is described below with reference to a two-component foam system, multi-component systems are also encompassed by the invention and realized with little effort, which have more than two, optionally reactive components, which in the film bag in more than two by separating elements from each other separate chambers are introduced.

According to a preferred embodiment, the multicomponent foam system is a two-component foam system of an inorganic fire-resistant foam or insulating foam with at least one hydraulic binder, at least one foaming system and optionally a foam stabilizer. Cement, in particular Portland cement, trass, pozzolans, hydraulic limestones and gypsum or mixtures thereof can be used as the hydraulic binder. The foaming system can be formed, for example, from an alkali or alkaline earth carbonate or bicarbonate as a powder component and a powdery acid as a foaming component. By a powdery acid is meant a chemical compound which causes an acidic reaction when dissolved in water, for example, citric acid or water-soluble salts of a weak base and a strong acid.

The foaming system may alternatively or additionally comprise an oxidizer and a catalyst. The oxygen carrier of the foaming component may be pulverulent peroxides or percarbonates, in particular sodium percarbonate. Powdery compounds suitable for the catalytic decomposition of percarbonates, for example in the form of metal salts, are known. Preferably, the catalyst may comprise manganese dioxide MnO ₂ in powder form.

At least one of the chambers of the multi-chamber film bag according to the invention has an opening portion which can be opened to fill the chamber with a liquid and then discharge the foam system. For this purpose, the chamber having the opening section has a preset residual volume for receiving the liquid, so that the inorganic powdery component, the foaming component and the liquid after mixing give a ready-to-use foam. The determination of the quantities required for this purpose the components and the liquid are well known to those skilled in the art. Preferably, the liquid is water.

By residual volume is meant the volume of the chamber remaining after filling one of the components in the chamber having the opening portion. On the one hand, the presetting can take place by virtue of the fact that the volume of the chamber remaining after the powder component has been filled corresponds exactly to the quantity of liquid required to produce a ready-to-use foam. However, the default can also be done by a mark provided on the chamber. In this case, the chamber is not completely filled even after filling the liquid. In both cases, however, the liquid can be precisely metered without additional measuring instruments. According to a preferred embodiment, the foaming component is present in the chamber having the opening portion.

The separating element may be formed as a peel seam or as a clamping element. The peel seam may be effected by heat-sealing or welding the opposing foil walls of the foil bag in an edge region of a chamber, so that this chamber is separated from the adjacent chamber of the foil bag in a liquid-tight manner. By selecting the film material and / or suitable film coatings, the tear strength of the peel seam can be adjusted such that the peel seam is torn open by pressure on one of the chambers and a flow connection between the chambers is provided.

According to a further embodiment, the separating element may be formed as a clamping seam. The clamping seam can be formed in the manner of a lip closure pocket or zipper connection with two interlocking clamping strips. It is also possible to attach a clamping rail to the film bag from the outside, the film bag is placed with a flat side on the provided with a longitudinal slot clamping rail and then pressed with a flexible or rod-shaped clamping strip from the other flat side of the film bag in the longitudinal slot. As a result, the opposing film walls of the film bag are pressed together and there is a liquid-tight separation of adjacent to the clamp closures in the film bag.

The clamping rail and / or the clamping strip can be provided as loose parts. As a result, a flexible division of the chambers in the foil bag is possible. According to a further embodiment, the clamping rail and / or the clamping strip is already attached to the outer wall of the film bag, for example by gluing or welding.

Particularly preferably, the separating element can be provided with compulsory mixing compounds which enable a faster and more homogeneous mixing of the inorganic powder component with the foaming component dissolved in the liquid during use. In particular, fixed webs may be provided between the opposing films of the film bag in the region of the separating element, or weld seams may be provided which remain in the pressure on one of the chambers and do not tear open.

The multi-chamber film bag can be formed as a stand-up pouch, as a flat bag or as a tubular bag. The production of these systems while maintaining specified volumes of the chambers, in particular the chamber having the opening section, is known in principle to the person skilled in the art. Stand-up pouches are usually equipped with a W-fold in the bottom area, which expands when filling the chamber in the bottom area and ensures a firm footing of the foil pouch. Flat bags are usually formed by stacking two plastic films and randumlaufendes welding of the films. Hose bags are formed by spraying the plastic films from round nozzles to form a film tube and bottom-side welding of the hose ends or jamming of the hose ends with a metal or plastic strap. Preferably, the multi-chamber film bag is designed as a flat bag with edge-circumferential weld.

According to a further embodiment of the multi-chamber foil bag, the opening section for discharging the foam system is provided with a screw-in closure welded into the foil bag. A screw cap allows the attachment of commercially available cartridge nozzles or nozzle tips with which the Foam system can be discharged from the foil bag depending on the desired application at the application.

According to a further embodiment, the opening section for discharging the foam system may be formed by a preferably tapered or pointed nozzle tip or plastic nozzle, which is welded into the film bag. If necessary, the nozzle tip or spout can be extended by attaching another plastic tip. Preferably, the nozzle tip or plastic grommet is closed at its free end and is cut at the application site depending on the desired size of the nozzle opening or can be terminated at an intended weakening zone, such as a tear notch or an annular predetermined breaking point. As a result, no scissors or knife is needed. The backfilling of on-site openings is so fast, easy and inexpensive possible.

Particularly preferably, the opening portion for discharging the foam system is formed by a sleeve integrally formed on the film bag. The spout may be tubular or conical or tapered toward its free end opposite the chamber. Particularly preferably, the spout is provided at its free end with a weakening zone such as a tear seam, which allows tearing of the spout without tools. In this way, even inaccessible openings can be quickly, easily and inexpensively filled with the foam system. The invention thus also relates to a use of the multi-chamber foil bag for packaging and / or processing of an inorganic multicomponent foam system.

Using the multi-chamber foil bag according to the invention, a local foam of a multicomponent inorganic foam system can be produced, wherein one of the chambers of the multi-chamber foil bag is filled with a powdery inorganic component and another chamber with a powdery foaming component, wherein the chambers in a first storage condition are liquid-tightly separated from one another by a separating element, and wherein in a second state of use by opening the separating element, a flow connection between the chambers can be provided, wherein the opening portion before opening the separating element is temporarily opened and the Preset residual volume of the opening portion having chamber is filled with a liquid. To form the foam, a flow connection between the chambers is provided by opening the separator and mixing the components and the liquid. The foam formed is discharged from the opening portion after mixing of the components and the water and introduced into an opening to be filled.

The inorganic multi-component foam system is preferably a two-component foam system, and more preferably a fire-resistant foam. Preferably, the mixing of the inorganic powder component with the powdery foaming component and the liquid, in the use state by manual kneading of the mass in the temporarily sealed foil bag.

For dispersing the inorganic powder component or the foaming component in the solvent, the opening portion may be closed again before opening the partition member. The expansion of the foam formed during mixing from the foam system may be taken into account by not filling the entire chamber volume with the inorganic powder component or the foaming component. This is a sufficient compensation volume in the foil bag available until the mixture is complete and the opening section can be opened again.

The foam formed from the foam system can then be discharged from the opening section by pressure on the end of the film bag opposite the opening section and introduced into the opening to be filled. The use of nozzle tips with a tapered discharge opening and a predetermined opening cross-section allows targeted introduction of the foam system in narrow gaps with poor accessibility. The nozzle tips can be provided with weakening zones, so that no scissors or knife is needed to open the extrusion tips. The on-site openings can thus be filled quickly, easily and inexpensively with the foam system.

Figur 1

eine schematische Darstellung des erfindungsgemäßen Folienbeutels gemäß einer ersten Ausführungsform;

Figur 2

eine schematische Darstellung des erfindungsgemäßen Folienbeutels gemäß einer weiteren Ausführungsform.

Further features and advantages of the invention will become apparent from the following description and from the following drawings, to which reference is made. In the drawings show:

FIG. 1

a schematic representation of the film bag according to the invention according to a first embodiment;

FIG. 2

a schematic representation of the film bag according to the invention according to a further embodiment.

The in FIG. 1 shown multi-chamber foil bag 10 is formed as a flat bag with circumferential weld 12 and an opening portion 14 in the form of an integrally formed on the foil bag spout for discharging the foam system. The bag 10 has two chambers 16, 18, wherein the chamber 16 contains a solid inorganic powder component 20 and the other chamber 18 contains a powdery foaming component 22. The chambers 16, 18 are bounded by the peripheral circumferential weld 12 and a separator 24, shown here as a heat-sealed peel seam. The peel seam provides a liquid-tight separation of the chambers 16, 18 in the storage condition of the film bag. Also shown is the tear seam 26 formed on the spout 14 for facilitating the opening of the bag. This can advantageously be supplemented or replaced by a notch.

The in FIG. 2 shown multi-chamber foil pouch 10 is also formed as a flat bag with circumferential weld 12 and an opening portion 14 in the form of an integrally formed on the foil bag spout for discharging the foam system. The bag 10 has two chambers 16, 18, one chamber 16 containing the solid inorganic powder component 20 and the other chamber 18 containing the powdery foaming component 22. The chambers 16, 18 are bounded by the edge-surrounding weld seam 12 and a separating element 24, here shown as a clamping rail 28 with clamping strip 30. For liquid-tight separation of the chambers 16, 18, the clamping rail 28 is placed on a flat side of the film bag 10 and then the clamping strip 30 is pressed from the other flat side of the film bag 10 from a longitudinal slot formed in the clamping rail. As a result, the opposing film walls of the film bag 10 are compressed in the storage condition.

In the region of the clamping element 24 further compulsory mixing joints 32 are provided in the form of interrupted welds, after opening the opening portion 14, filling the chamber 18 through the opening formed with a liquid, preferably water, and then opening the clamping member 24 in the use state of the film bag 10th provide for compulsory mixing of the components in the chambers 16, 18. Also shown is the tear seam 26 formed on the spout 14 for facilitating the opening of the bag. This can advantageously be supplemented or replaced by a notch.

Instead of the nozzle 14, a nozzle tip welded into the film bag or a screw cap can be provided, onto which a cartridge nozzle can be placed.

The powder component 20 preferably comprises in all embodiments a hydraulically setting binder based on gypsum or cement mortar, as well as the solid components of the foaming system such as an alkali or alkaline earth carbonate and / or a catalyst for the release of oxygen from an oxygen carrier. The foaming component preferably comprises a powdered acid and / or peroxide compound.

The inorganic powder component for a fire protection foam may comprise, for example, a natural gypsum, in particular calcium sulfate dihydrate and / or calcium sulfate hemihydrate, pentaerythritol, expandable graphite, calcium carbonate, in particular precipitated calcium carbonate, manganese dioxide and glass fibers. The foaming component for the inorganic powder component preferably contains sodium percarbonate. Water is used as the dispersing or solvent for the foaming component.

In order to produce a local foam from the inorganic multicomponent foam system 20, 22, the opening section 14 is opened and the chamber 18, which preferably contains the foaming component, is filled with a liquid, preferably water, through the opening formed. The opening section then becomes again locked. This can be done, for example, manually or by using a bracket.

The powder component contained in the chamber 18 may be dispersed or dissolved in the liquid. Subsequently, the separating element 24 is opened and a flow connection between the chambers 16, 18 is produced. The film bag 10 is thus from the storage condition in which the chambers 16, 18 are separated liquid-tight, in the use state. By manually kneading, the solid inorganic powder component 20 is mixed with the dissolved foaming component 22 to form a foam with the opening portion 14 closed.

After mixing, the opening section 14 is opened again and the foamed mass is discharged from the foil bag by pressure on the end of the foil bag opposite the opening section 14 and introduced directly into the on-site opening to be filled by means of the grommet at the opening section 14. There, the mass can be subsequently brought into shape and harden.

Claims (13)

Multi-chamber foil bag (10) for a multi-component inorganic foam system, comprising at least two chambers (16, 18) separated from one another in a liquid-tight manner, one of the chambers (16, 18) having a powdery inorganic component (20), optionally based on gypsum or Cement mortar, and another chamber with a, optionally for the component (20) reactive, powdery foaming component (22) is filled, and with a separating element (24), the liquid-tightly separated from each other the chambers (16, 18) in a first state and in a second state, providing flow communication between the chambers (16, 18), at least one of the chambers (16, 18) having an opening portion (14) which can be opened to discharge the foam system, and wherein the opening portion (14 ) having a pre-set residual volume for receiving a liquid having chamber. A multi-compartment foil pouch according to claim 1, wherein the multicomponent foam system is a fire-proofing foam. Multi-chamber foil pouch according to claim 1 or 2, wherein the separating element (24) comprises a peel seam or a clamping element. Multi-chamber film bag according to one of the preceding claims, wherein the separating element (24) has a clamping seam or clamping rail (28) with clamping strips (30). Multi-chamber foil bag according to one of the preceding claims, wherein compulsory mixing connections (32) are provided in the region of the separating element (24). Multi-chamber foil pouch according to one of the preceding claims, wherein the foil pouch (10) is a stand-up pouch, a flat pouch with peripherally welded edges, or a tubular pouch. Multi-chamber foil pouch according to one of the preceding claims, wherein the opening portion (14) comprises a screw cap. A multi-chamber foil pouch according to one of the preceding claims, wherein the opening portion (14) comprises a plastic nozzle tip welded into the pouch. Multi-chamber foil pouch according to one of the preceding claims, wherein the opening portion (14) has an integrally formed on the foil pouch spout with tear seam. Use of a multi-chambered film bag according to any one of claims 1 to 9 for the packaging and / or processing of a multi-component inorganic foam system. A process for the production of a local foam of a multi-component inorganic foam system using a multi-chambered film bag according to one of the preceding claims 1 to 9, wherein
one of the chambers (16, 18) of the multi-chamber foil bag (10) with a powdery inorganic component (20), optionally based on gypsum or cement mortar, and another chamber (16, 18) with one, optionally for the component (20 ), wherein the chambers (16, 18) in a first storage condition by a separating element (24) are liquid-tightly separated from each other, and wherein in a second state of use by opening the separating element (24) has a flow connection between the chambers (16, 18) can be provided, the opening portion (14) is opened and the preset residual volume of the opening portion having chamber is filled with a liquid,
then, to form the foam, opening the separator (24) to provide flow communication between the chambers (16, 18) and
the powdered components (20, 22) and the liquid are mixed, wherein subsequently the foam formed is discharged from the opening portion (14) and introduced into an opening to be filled. A method according to claim 11, characterized in that the opening portion (14) is closed again before opening the separating element (24). A method according to claim 11 or 12, wherein the mixing of the powder components (20, 22) and the liquid is carried out by manual kneading.

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