Process for the preparation of a package containing compacted composition and the package obtained with this process
View Patent ↗A process for the preparation of a package containing a compacted particulate composition, comprises wrapping a compacted particulate composition with a first film and treating the wrapped compacted particulate composition at an elevated temperature to shrink the film such that it clings to said composition. The resulting packages may be made using low compaction pressures and consequently may have low friability and be fast dissolving.
1. A process for the preparation of a package containing a tablet, the process, comprising the steps of:
(a) flow wrapping the tablet with a heat shrinkable, water soluble polymeric film; and, thereafter,
(b) heat treating the wrapped tablet at an elevated temperature using a flow of air at an elevated temperature to shrink the film such that it clings to said tablet, wherein the said package is non-friable and wherein the said tablet itself is friable.
2. The process according to claim 1 , wherein the heat treatment step (b) is carried out in a time of 0.1 to 5 seconds.
3. The process according to claim 1 , wherein the air is heated to a temperature of between 90 to 950° C.
4. The process according to claim 1 , wherein in step (b) the film is heated to a temperature of between 80 to 220° C.
5. The process according to claim 1 , wherein the film has an aperture to allow the release of any trapped air during step (b).
6. The process according to claim 1 , wherein the thickness of the film is 10 to 2000 μm.
7. The process according to claim 1 , wherein the film comprises polyvinyl alcohol.
8. The process according to claim 1 , wherein the tablet is a fabric care, surface care or dishwashing composition.
9. The process according to claim 1 , wherein the process includes the step of: forming the tablet at a compaction pressure in the range 150-400 kg/cm 2 to form the tablet.
10. The process according to claim 9 , wherein the said package is packaged in an outer non-water soluble container.
11. The process according to claim 1 , wherein the said package is quick dissolving in water; quick dissolving meaning that a 20 g package will dissolve in water which is at 40° C. in less that 10 minutes, under conditions of water agitation.
12. The process according to claim 1 , wherein the said tablet has a hardness not exceeding 200 N.