Shelf-Stable Salad Dressing Emulsion Viscosity and pH Control
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Solution Overview
Problem
Existing salad dressings face challenges in achieving both shelf stability and sprayability, as high viscosity is required for stability but can make products non-sprayable, and increased acidity for microbial stability can lead to emulsion instability.
Innovation Solution
The development of shelf-stable salad dressings with a specific composition of oil-in-water emulsions, including oils, thickening agents, acidic components, and emulsifiers, which maintain a pH below 4.5 to ensure microbial stability while achieving a sprayable viscosity between 1000 cps and 5000 cps, allowing for even dispersion via a spray nozzle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the viscosity of salad dressing is increased to improve physical stability and emulsion stability, then the dressing becomes non-sprayable and cannot be evenly dispersed from a spray nozzle
Solution Approach 1:
The patent applies parameter changes by carefully controlling the viscosity of the salad dressing within a specific range (1000-5000 cps) rather than simply increasing it. This optimized viscosity parameter allows the dressing to maintain emulsion stability while remaining sprayable and evenly dispersible from a spray nozzle, resolving the contradiction between stability and sprayability.
2Reliability
If the acidity (pH) of the dressing is increased to improve microbial stability, then the emulsion becomes unstable
Solution Approach 1:
The patent applies parameter changes by controlling the pH of the aqueous phase within a specific range (below 4.5) rather than simply increasing acidity. This optimized pH parameter ensures microbial stability while preventing emulsion instability, resolving the contradiction between microbial stability and emulsion stability.
3Stability of the object's composition
If traditional emulsified dressings are made shelf-stable through refrigeration, then the product requires continuous cooling which increases complexity and reduces convenience
Solution Approach 1:
The patent applies parameter changes by optimizing the pH of the aqueous phase to below 4.5 and controlling the emulsion composition to achieve shelf stability at ambient temperature without refrigeration. This eliminates the need for continuous cooling and complex storage requirements while maintaining product stability.
Solution Approach 2:
The patent uses an intermediary approach by incorporating specific emulsifiers and stabilizers that mediate between the oil and aqueous phases, enabling the emulsion to remain stable at ambient temperature without requiring refrigeration, thus resolving the contradiction between shelf stability and storage complexity.
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 solution provides salad dressings that are both shelf-stable for at least 6 months at ambient temperature and sprayable, maintaining emulsion and microbial stability, with a spray score between 2 and 4, ensuring even mist formation and consumer convenience.
Implementation Method 1
The salad dressing emulsions described herein are both shelf-stable and sprayable
Implementation Method 2
an emulsifier, and water
Implementation Method 3
a sprayable viscosity that allows the emulsified dressings to be evenly dispersed from a spray nozzle
Implementation Method 4
an acidic component in an amount effective to provide the salad dressing product with a pH below about 4.5
Implementation Method 5
to ensure microbial stability
Data Source
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AI summary
Shelf-stable dressing compositions that are readily sprayable are provided herein. The shelf-stable dressings are generally comprised of oil, water, a thickening agent, an acidic component, and an emulsifier in amounts effective to provide a stable emulsion with microbial stability. The shelf-stable dressing compositions provided herein are advantageously characterized by a sprayable viscosity that allows the emulsified dressings to be evenly dispersed via a spray nozzle.