Method for producing a washing agent portion unit with improved optical and rheological properties

1. A method for producing an opacified washing agent portion unit having at least one filled receiving chamber surrounded by a water-soluble film, comprising the steps of:

a) transporting a first water-soluble film in the direction of a dosing station at a speed above 0.04 m/s;

b) molding the first water-soluble film into cavities of a deep-drawing die located below the water-soluble film, so as to form at least one cavity having a maximum diameter in the direction of travel of the film of between 3 and 75 mm;

c) filling the cavity by means of the dosing station with a first flowable washing agent preparation containing, based on its total weight,

i) 20 to 80 wt. % surfactant consisting of anionic surfactant and non-ionic surfactant;

ii) 2 to 15 wt. % fatty acid;

iii) 0.4 to 6 wt. % of a salt of a divalent cation;

iv) 8 to 35 wt. % solvent;

v) 0.5 to 4 wt. % of a salt of a monovalent metal cation; and

vi) 0.3 to 5 wt. % of a co-surfactant that differs from the non-ionic surfactant and is selected from the group consisting of, aliphatic C 6 -C 14 alcohols, aromatic C 6 -C 14 alcohols, aliphatic C 6 -C 12 dialcohols, monoglycerides of C 12 -C 18 fatty acids, and monoglycerol ethers of C 8 -C 18 fatty alcohols;

d) further transporting the filled cavity in the direction of a sealing station at a speed above 0.04 m/s;

e) sealing the filled cavity with a second water-soluble film;

wherein the first flowable washing agent preparation has a turbidity above 60 NTU and is free from enzymes.

2. The method according to claim 1 , wherein the water-soluble film is continuously transported from step a) to step e).

3. The method according to claim 1 , wherein the first water-soluble film is transported at a speed from 0.08 to 0.3 m/s in step a).

4. The method according to claim 3 , wherein the first water-soluble film is transported at a speed from 0.1 to 0.2 m/s.

5. The method according to claim 1 , wherein the cavity formed in step b) has a maximum diameter in the direction of travel of the film between 3 and 40 mm.

6. The method according to claim 5 , wherein the cavity has a maximum diameter in the direction of travel of the film between 3 and 20 mm.

7. The method according to claim 5 , wherein the cavity has a maximum diameter in the direction of travel of the film between 3 and 15 mm.

8. The method according to claim 1 , wherein the first flowable washing agent preparation contains, based on its total weight,

i) 20 to 80 wt. % surfactant, wherein the anionic surfactant is present in an amount from 20 to 50 wt. %;

ii) 4 to 12 wt. % of the fatty acid;

iii) 0.5 to 4 wt. % of the salt of a divalent metal cation.

9. The method according to claim 1 , wherein the first flowable washing agent preparation contains, based on its total weight,

i) 32.3 to 80 wt. % of the surfactant, wherein the anionic surfactant is present in an amount from 20 to 50 wt. % and the nonionic surfactant is present in an amount from 12 to 30 wt. %;

ii) 4 to 12 wt. % of the fatty acid;

iii) 0.5 to 4 wt. % of the salt of a divalent cation.

10. The method according to claim 1 , wherein the first water-soluble film is transported at a speed from 0.08 to 0.3 m/s in step d).

11. The method according to claim 10 , wherein the first water-soluble film is transported at a speed from 0.1 to 0.2 m/s.

12. The method according to claim 1 , wherein the washing agent portion unit has at least two receiving chambers which enclose one another at least in part.

13. The method according to claim 1 , wherein the first water-soluble film is transported in the direction of a dosing station at a speed of 0.08 m/s.

14. The method according to claim 1 , wherein the filled cavity is further transported in the direction of a sealing station at a speed of 0.08 m/s.

15. A method for producing a washing agent portion unit having at least one filled receiving chamber surrounded by a water-soluble film, comprising the steps of:

a) transporting a first water-soluble film in the direction of a dosing station at a speed above 0.04 m/s;

b) molding the first water-soluble film into cavities of a deep-drawing die located below the water-soluble film, so as to form at least one cavity having a maximum diameter in the direction of travel of the film of between 3 and 75 mm;

c) filling the cavity by means of the dosing station with a first opacified flowable washing agent preparation free of amphoteric surfactant and containing, based on its total weight,

i) 20 to 80 wt. % surfactant containing anionic surfactant and non-ionic surfactant,

ii) 2 to 15 wt. % fatty acid;

iii) 0.5 to 4 wt. % of the salt of a divalent cation;

iv) 8 to 35 wt. % solvent;

v) 0.5 to 4 wt. % of a salt of a monovalent metal cation; and

vi) 0.3 to 5 wt. % of a co-surfactant that differs from the non-ionic surfactant and is selected from the group consisting of aliphatic C 6 -C 14 alcohols, aromatic C 6 -C 14 alcohols, aliphatic C 6 -C 12 dialcohols, monoglycerides of C 12 -C 18 fatty acids, and monoglycerol ethers of C 8 -C 18 fatty alcohols;

d) further transporting the filled cavity in the direction of a sealing station at a speed above 0.04 m/s; and

e) sealing the filled cavity with a second water-soluble film.

16. The method according to claim 15 , wherein the water-soluble film is continuously transported from step a) to step e).

17. The method according to claim 15 , wherein the first water-soluble film is transported at a speed from 0.08 to 0.3 m/s in steps a) and d).