Process for making a single or multi-compartment pouch

Patent metadata

Field	Value
Publication number	US-2016348044-A1
Application number	US-201615154043-A
Country	US
Kind code	A1
Filing date	May 13, 2016
Priority date	May 29, 2015
Publication date	Dec 1, 2016
Grant date	—

Abstract

A process for making a single or multi-compartment water-soluble cleaning pouch, the pouch comprising an enveloping material and a detergent composition, the detergent composition comprising a cohesive powder and having a low pH, the process comprising the steps of: i) making a first open compartment and filling the first open compartment with a homogeneous free-flowing powder comprising the cohesive powder in the form of a secondary particle wherein at least 80% of the homogeneous free-flowing powder has a weight average particle size of from about 250 to about 850 μm with less than about 10% by weight of the particles below about 150 μm and less than about 5% by weight of the particles above about 1180 μm and wherein the powder has a cake strength of less than about 20 N; ii) optionally making a second open compartment and filing the second open compartment with a liquid; and iii) closing the open compartment(s) to make a pouch.

First claim

What is claimed is:

1 . A process for making a single or multi-compartment water-soluble cleaning pouch, the pouch comprising an enveloping material and a detergent composition, the detergent composition comprising a cohesive powder and having a low pH, the process comprising the steps of:
i) making a first open compartment and filling the first open compartment with a homogeneous free-flowing powder comprising the cohesive powder in the form of a secondary particle wherein at least 80% of the homogeneous free-flowing powder has a weight average particle size of from about 250 to about 850 μm with less than about 10% by weight of the particles below about 150 μm and less than about 5% by weight of the particles above about 1180 μm and wherein the powder has a cake strength of less than about 20 N; ii) optionally making a second open compartment and filing the second open compartment with a liquid; and iii) closing the open compartment(s) to make a pouch.

2 . A process according to claim 1 wherein the cohesive powder is an iron chelant.

3 . A process according to claim 1 wherein the secondary particle is an agglomerate comprising:
i) the cohesive powder; and
ii) a highly water-soluble salt.

4 . A process according to claim 1 wherein at least 80% of the cohesive powder has a particle size below 100 μm.

5 . A process according to claim 1 wherein the cohesive powder is an iron chelant selected from the group consisting of siderophores, catechols, enterobactin, hydroxamates, hydroxypyridinones (or hydroxypyridine N-Oxides) and mixtures thereof.

6 . A process according to claim 1 wherein the wherein the cohesive powder is an iron chelant comprising a catechol sulfonate.

7 . A process according to claim 1 wherein the cohesive powder is an iron chelant comprising a hydroxypyridine N-Oxide.

8 . A process according to claim 1 wherein the cohesive powder is an iron chelant and the detergent composition comprises from about 0.1% to about 5% by weight of the composition of iron chelant.

9 . A process according to claim 1 wherein the secondary particle is an agglomerate comprising:
i) the cohesive powder; and
ii) a highly water-soluble salt.
wherein the highly water soluble salt is citrate.

10 . A process according to claim 1 wherein the secondary particle is an agglomerate comprising:
i) the cohesive powder; and
ii) a highly water-soluble salt.
wherein the agglomerate is made by admixing the cohesive powder with the highly water-soluble salt and with less than 20% by weight of the agglomerate of water and wherein the highly water soluble salt comprises is a mixture of two different particle sizes.

11 . A process according to claim 1 wherein the secondary particle is an agglomerate comprising:
i) from about 10 to 40% by weight of the agglomerate of iron chelant;
ii) from about 20 to 60% by weight of the agglomerate of fine citrate having a weight average particle size of from about 212 to less than 425 μm; and
iii) from about 20 to 60% by weight of the agglomerate of coarse citrate having a weight average particle size of from greater than 425 to about 850 μm.

12 . A process according to claim 1 wherein the liquid in the second compartment comprises an aqueous lime soap dispersing agent.

13 . A process according to claim 1 wherein the liquid has a viscosity of from about 1 to about 500 m Pa s at 23° C.

14 . A process according to claim 1 wherein the liquid has eRH of less than about 60% at about 20° C.

15 . A single or multi-compartment water-soluble detergent pouch obtainable according to the process of claim 1 .

Assignees

• Procter & Gamble

Inventors

• Smith David John
• Souter Philip Frank
• Brooker Alan Thomas
• Somerville Roberts Nigel Patrick

Classifications

• B65B7/02

  Closing containers or receptacles deformed by, or taking-up shape, of, contents, e.g. bags, sacks · CPC title

• B65B3/04

  Methods of, or means for, filling the material into the containers or receptacles · CPC title

• B65D65/46

  Applications of disintegrable, dissolvable or edible materials · CPC title

• C11D17/045 Primary

  Multi-compartment · CPC title

• B65B1/04

  Methods of, or means for, filling the material into the containers or receptacles · CPC title