Shelf stable homogeneous suspension
Protein-containing suspensions such as milk that are preserved by a UHT treatment, show age gelation. This age gelation can be reduced by inclusion of an emulsifier with an HLB value below 16.
1. Sterilized aqueous suspension comprising 0.5 to 10% protein and from 0.1 to 8 wt % fat and optionally a fat replacer and from 0.01 wt % to 1 wt % emulsifier with a hydrophylic/lypophylic balance of at or below 16 wherein the emulsifier comprises a monoglyceride, the suspension comprising a phytosterol or ester thereof and further wherein the suspension has been sterilized at a temperature of around 110° C. or higher, the suspension having a viscosity of from 2 to 100 mPaS at a temperature of between 5 and 25° C. and a shear rate of 100 Hz.
2. Aqueous suspension according to claim 1 comprising from 1 to 10 wt % protein.
3. Aqueous suspension according to claim 1 wherein the protein is a dairy protein.
4. Aqueous suspension according to claim 1 wherein the emulsifier further includes an emulsifier selected from the group of lecithins, diglycerides, diacetyl tartaric acid esters of mono-and diglycerides, sucrose esters of fatty acids, sodium steoroyl lactylate (SSL), citric acid esters of mono- and diglycerides, or a combination thereof.
5. Aqueous suspension according to claim 1 wherein the emulsifier further includes an emulsifier selected from the group of lecithins, diglycerides or a combination thereof.
6. The sterilized aqueous suspension according to claim 1 comprising 0.005 to 0.5 wt % thickener.
7. The sterilized aqueous suspension according to claim 1 which does not show any age gelation after 8 weeks storage at 20 to 25° C.
8. Aqueous suspension according to claim 1 wherein the amount of emulsifier is from 0.05 to 0.2 wt %.
9. The aqueous suspension according to claim 1 wherein the level of fat in the aqueous suspension is from 1 to 5 wt %.
10. The aqueous suspension according to claim 1 wherein the suspension has been sterilized at a temperature of over 120° C.
11. The aqueous suspension according to claim 1 comprising from 0.2 to 4 wt % phytosterol ester.
12. The suspension according to claim 1 wherein the monoglyceride has an HLB of 1 to 6.
13. The suspension according to claim 1 wherein the emulsifier consists of monoglyceride.