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 forming water-soluble pouches comprising the steps:
(a) drawing a first layer of film into a mould to form a first compartment;
(b) adding a particulate composition to said first compartment;
(c) forming a second compartment over said first compartment by drawing a second layer of film into said mould;
wherein the second compartment comprises a composition and the second layer of film is drawn in to the mould by means of suction applied through at least one perforation in the first layer of film.
2. A process according to claim 1 wherein said particulate composition is a cleaning composition.
3. A process according to claim 1 wherein the perforation in said first layer of film has a diameter of less than about 2 mm.
4. A process according to claim 1 wherein the suction applied to said second layer of film is from about 950 to about 30 mbar.
5. A process according to claim 1 wherein the film of said first and second layers 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.
6. A process according to claim 1 wherein the film of said first and second layers is selected from the group consisting of: polyvinyl alcohols; polyvinyl alcohol copolymers and hydroxypropyl methyl cellulose; and mixtures thereof.