Multi-chamber film bag and use thereof

Abstract

A multi-chamber film bag for an inorganic multi-component foam system has at least two chambers which are partitioned off from each other in a liquid-tight manner. One of the chambers is filled with an inorganic component in powder form, on the basis of either gypsum or cement mortar, and another chamber is filled with a foaming component in powder form which can react with the component. A partition element separates the chambers from each other in a liquid-tight manner in a first state and can provide a flow connection between the chambers in a second state. At least one of the chambers has an opening section which can be opened to discharge the foam system, wherein the chamber having the opening section has a predefined residual volume for receiving a liquid.

Claims

1. A multi-chamber film bag for an inorganic multi-component foam system, the multi-chamber film bag comprising: at least two chambers separated from one another in liquid-tight manner, wherein one of the chambers is filled with a powdered inorganic component, optionally based on gypsum or cement mortar, wherein another chamber is filled with a powdered foaming component, which is optionally reactive for the powdered inorganic component, and wherein water is not present in the at least two chambers, and a separating element, which in a first condition separates the chambers from one another in liquid-tight manner and in a second condition is able to establish fluidic communication between the chambers, wherein at least one of the chambers has an opening portion, which can be opened to discharge the foam system, and wherein the chamber having the opening cross section has a preadjusted residual volume for receiving a liquid.

2. The multi-chamber film bag according to claim 1, wherein the multi-component foam system is a fire-protection foam.

3. The multi-chamber film bag according to claim 1, wherein the separating element is a peel seam or a clamping element.

4. The multi-chamber film bag according to claim 1, wherein the separating element has a clamping seam or clamping rail with clamping strips.

5. The multi-chamber film bag according to claim 1, wherein compulsory mixing joints are provided in the region of the separating element.

6. The multi-chamber film bag according to claim 1, wherein the film bag is a stand-up bag, a flat bag with edges welded around the borders or a tubular bag.

7. The multi-chamber film bag according to claim 1, wherein the opening portion has a screw cap.

8. The multi-chamber film bag according to claim 1, wherein the opening portion comprises a nozzle tip of plastic welded into the bag.

9. The multi-chamber film bag according to claim 1, wherein the opening portion has a socket with tear seam molded in one piece onto the film bag.

10. A method for packaging and/or processing of an inorganic multi-component foam system, said method comprising: contacting the multi-chamber film bag according to claim 1 with said inorganic multi-component foam system.

11. A process for production of a foam-in-place foam from an inorganic multi-component foam system using a multi-chamber film bag according to claim 1, said process comprising: filling one of the chambers of the multi-chamber film bag with a powdered inorganic powder component, optionally based on gypsum or cement mortar, and filling another chamber with a powdered foaming component, which is optionally reactive for the inorganic powder component, wherein none of the chambers of the multi-chamber film bag contain water, wherein the chambers, in a first storage condition, are separated from one another in liquid-tight manner by a separating element, and wherein, in a second ready-to-use condition, fluidic communication between the chambers may be established by opening of the separating element, the opening portion is opened and the preadjusted residual volume of the chamber having the opening portion is filled with a liquid, then, in order to form the foam, fluidic communication between the chambers is established by opening of separating element, and the powdered component and the liquid are mixed, wherein the formed foam is then discharged from the opening portion and introduced into an opening to be filled.

12. The process according to claim 11, wherein the opening portion is closed again prior to opening of the separating element.

13. The process according to claim 11, wherein the mixing of the powder components and the liquid is performed by manual kneading.

14. The multi-chamber film bag according to claim 1, wherein the one of the chambers is filled only with the powdered inorganic component and wherein the another chamber is filled only with the powdered foaming component.

Description

(1) Further features and advantages of the invention will become apparent from the description hereinafter and from the attached drawings, to which reference is made. In the drawings:

(2) FIG. 1 shows a schematic diagram of the inventive film bag according to a first embodiment;

(3) FIG. 2 shows a schematic diagram of the inventive film bag according to a further embodiment.

(4) Multi-chamber film bag 10 illustrated in FIG. 1 is formed as a flat bag with peripheral weld seam 12 and an opening portion 14 in the form of a socket, molded in one piece onto the film bag, for discharging the foam system. Bag 10 has two chambers 16, 18, wherein chamber 16 contains solid inorganic powder component 20 and the other chamber 18 contains a powdered foaming component 22. Chambers 16, 18 are bounded by weld seam 12 around the borders and a separating element 24, illustrated here as a heat-sealed peel seam. The peel seam provides liquid-tight separation of chambers 16, 18 in the storage condition of the film bag. Tear seam 26 formed on socket for simplified opening of the bag is likewise shown. This may be advantageously supplemented or replaced by a notch.

(5) Multi-chamber film bag 10 illustrated in FIG. 2 is likewise formed as a flat bag with peripheral weld seam 12 and an opening portion 14 in the form of a socket, molded in one piece onto the film bag, for discharging the foam system. Bag 10 has two chambers 16, 18, wherein the one chamber 16 contains solid inorganic powder component 20 and the other chamber 18 contains powdered foaming component 22. Chambers 16, 18 are bounded by weld seam 12 around the borders and a separating element 24, illustrated here as a clamping rail 28 with clamping slat 30. For liquid-tight separation of chambers 16, 18, clamping rail 28 is placed on one flat side of film bag 10 and then clamping strip 30 is pressed from the other flat side of film bag 10 into a longitudinal slit formed in the clamping rail. Thereby the film walls of film bag 10 disposed opposite one another are pressed together in the storage condition.

(6) Compulsory mixing joints 32 in the form of continuous weld seams are further provided in the region of clamping element 24. After opening portion 14 has been opened, chamber 18 has been filled with a liquid, preferably water, through the formed opening, and then clamping element 24 has been opened in the ready-to-use condition of film bag 10, these provide for compulsory mixing of the components in chambers 16, 18. Tear seam 26 formed on socket for simplified opening of the bag is likewise shown. This may be advantageously supplemented or replaced by a notch.

(7) Instead of socket, a nozzle tip welded into the film bag or a screw cap may provided, on which a cartridge nozzle may be attached.

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

(9) As an example, the inorganic powder component for a fire-protection foam may comprise a natural gysum, especially calcium sulfate dihydrate and/or calcium sulfate hemihydrate, pentaerythritol, expandable graphite, calcium carbonate, especially 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 agent or solvent for the foaming component.

(10) For production of a foam-in-place foam from inorganic multi-component foam system 20, 22, opening portion 14 is opened and chamber 18 preferably containing the foaming component is filled through the formed opening with a liquid, preferably water. The opening portion is then closed once again. This may be done manually, for example, or by using a clamp.

(11) The powder component contained in chamber 18 may be dispersed or dissolved in the liquid. Then separating element 24 is opened and fluidic communication between chambers 16, 18 is established. Film bag 10 then changes from the storage condition, in which chambers 16, 18 are separated from one another in liquid-tight manner, to the ready-to-use condition. By manual kneading, solid inorganic powder component 20 is mixed with dissolved foaming component 22 to form a foam while opening portion 14 is closed.

(12) After mixing, opening portion 14 is opened once again and the foamed compound is discharged from the film bag by pressure on the end of the film bag opposite opening portion 14 and, by means of the socket on opening portion 14, is introduced directly into the opening to be filled in the building. There the compound may be subsequently shaped and cured.