Frozen Aerated Confections Using Free Beta-Casein for Bubble Control
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Solution Overview
Problem
Existing methods for producing frozen aerated confections with small gas bubbles are complex and require specialized ingredients or processing, making it difficult to achieve a substantial proportion of gas bubbles with diameters less than 50 µm, which affects the texture and creaminess of the final product.
Innovation Solution
Incorporating at least 0.2 wt% free ß-casein, where it constitutes at least 45% of the total ß-casein, to create a frozen aerated confection with a high proportion of gas bubbles having diameters less than 20 µm, and using a process involving aeration and freezing, either simultaneously or in either order, to produce a smooth and creamy texture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional aeration methods are used to create gas bubbles in frozen aerated confections, then gas bubbles are formed, but the bubbles tend to coarsen through creaming, coalescence and disproportionation resulting in fewer, larger bubbles
Solution Approach 1:
The patent introduces a specific protein (beta-casein) as an intermediary substance that adsorbs at the gas-liquid interface and provides steric stabilization to gas bubbles. This mediator prevents direct interaction between bubbles that would lead to coalescence and creaming, thereby maintaining small bubble sizes throughout storage and distribution.
Solution Approach 2:
The patent changes the chemical parameter of the system by specifying a minimum concentration of free beta-casein (at least 0.2 wt% of total beta-casein). This parameter change fundamentally alters the interfacial properties of the gas bubbles, providing sufficient steric barrier to prevent coarsening mechanisms while maintaining the desired bubble size distribution.
2Manufacturing precision
If specialized ingredients or complex processing methods are used to produce small gas bubbles, then gas bubbles with diameters less than 50 μm can be achieved, but the manufacturing process becomes more complex and requires specialized ingredients
Solution Approach 1:
The patent employs a simple, readily available ingredient (beta-casein, a common milk protein) rather than specialized or expensive additives. This approach uses a naturally occurring substance that can be easily incorporated into standard ice cream formulations without requiring complex processing equipment or specialized manufacturing infrastructure.
Solution Approach 2:
The patent achieves the desired effect by adjusting a single compositional parameter - the ratio of free beta-casein to total beta-casein (at least 45% free beta-casein). This parameter change can be achieved through standard mixing and aeration processes already used in ice cream manufacturing, avoiding the need for complex equipment or multi-step processing methods.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The use of free ß-casein effectively stabilizes small gas bubbles, resulting in a product with at least 65% of bubbles having diameters less than 20 µm, enhancing the texture and creaminess of frozen aerated confections like ice cream, sorbet, and frozen yoghurt, without the need for additional aerating agents like hydrophobins or sucrose esters.
Implementation Method 1
The effectiveness of the gas bubbles is related to their size: generally, the smaller the bubbles, the smoother and creamier the texture. However, it is difficult to create and preserve gas bubbles with sizes of less than about 50 μm. This is because a dispersion of gas bubbles is vulnerable to coarsening by creaming, coalescence and disproportionation
Implementation Method 2
b) aerating the mixture so that a population of gas bubbles is formed, wherein at least 65% of the gas bubbles have a diameter of less than 20μm
Implementation Method 3
c) freezing the mixture; wherein steps b) and c) may take place simultaneously or in either order
Data Source
Figure 1
AI summary
A frozen aerated confection is provided, the confection comprising at least 0.2 wt% free ß-casein, wherein the free ß-casein constitutes more than 45% of the total ß-casein present in the frozen confection; and containing a population of gas bubbles, wherein at least 65% of the gas bubbles have a diameter of less than 20µm. A process for producing such a frozen aerated confection is also provided.