Process for production of pouches
A process for the production of water-soluble pouches. The process comprises the steps of drawing a first film into a mould to form a first compartment, adding composition to the first compartment, drawing a second film into the mould to form a second compartment which comprises a composition and, preferably, sealing. The first film is perforated and the second film is drawn into the mould by means of suction applied through the first film. This eliminates the need to align separately formed pouches or containers. This also reduces the total amount of film needed to produce a multi-compartment pouch. Furthermore, it is very easy to vary the film material used according to what properties are desired. Since the different compartments may require different properties this adds flexibility to the process. Process particularly suited for the production of water soluble pouches such as cleaning or fabric care pouches.
1. A process for the production of water-soluble pouches comprising the steps:
(a) drawing a first film into a mould to form a first compartment;
(b) adding a composition to the first compartment;
(c) forming a second compartment by drawing a second film into the mould by means of suction applied through at least one perforation in the first film;
(d) compacting the composition in the first compartment;
(e) adding a composition to the second compartment;
(f) covering the second compartment with a third film; and
(g) sealing the pouch.
2. A process according to claim 1 wherein at least one of the compositions is a cleaning composition.
3. A process according to claim 1 wherein the composition in the first compartment is a particulate.
4. A process according to claim 1 wherein the perforation has a diameter of less than about 2 mm.
5. A process according to claim 1 wherein the suction is from about 950 to about 30 mbar.
6. A process according to claim 1 wherein the film material is selected from the group consisting of: polyacrylates and water-soluble acrylate copolymers; methylcellulose; carboxymethylcellulose sodium; dextrin; ethylcellulose; hydroxyethyl cellulose; hydroxypropyl methylcellulose; maltodextrin; polymethacrylates; and mixtures thererof.
7. A process according to claim 1 wherein the film material is selected from the group consisting of: polyvinyl alcohols; polyvinyl alcohol copolymers; hydroxypropyl methyl cellulose; and mixtures thereof.
8. A process according to claim 1 wherein the perforations are pre-formed.