Solid Rinse Aid Composition for Spotting Prevention
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Solution Overview
Problem
Current rinse agents for mechanical warewashing machines often result in spotting due to high foaming surfactants and require complex defoaming agents, and there is a need for environmentally friendly, biodegradable alternatives suitable for food service industries.
Innovation Solution
A solid rinse aid composition incorporating sodium sulfate and urea as solidification agents, combined with alcohol ethoxylates as sheeting agents and a defoamer component, formulated to be phosphate-free, aminocarboxylate-free, and using GRAS ingredients, which reduces foam stability and prevents spotting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high foaming surfactants are used as rinse agents, then sheet formation is promoted and spotting is reduced, but foam stability increases causing interference with warewashing machine operation
Solution Approach 1:
The patent introduces defoaming agents as intermediary substances that selectively break down foam while preserving the sheet formation mechanism. These defoamers act as mediators between the high foaming surfactants and the warewashing machine operation, allowing the beneficial sheeting effect to continue while eliminating the harmful foam interference through controlled foam destabilization
2Object-generated harmful factors
If defoaming agents are added to stabilize foam, then foam interference is reduced, but the chemical complexity of the rinse aid composition increases
Solution Approach 1:
The patent modifies physical and chemical parameters of existing surfactant molecules to achieve both defoaming and sheeting properties. By adjusting molecular weight, hydrophobic chain length, and ethoxylate content, the formulation achieves foam instability at the air-liquid interface while maintaining sheet formation capability, eliminating the need for separate defoaming agent components
3Reliability
If conventional rinse agents are used, then cleaning performance is maintained, but environmental friendliness and biodegradability are compromised
Solution Approach 1:
The patent changes the chemical composition parameters by selecting surfactants with specific molecular structures that exhibit both effective cleaning performance and enhanced biodegradability. By modifying the hydrophobic chain structure and hydrophilic head group composition, the formulation achieves environmental friendliness without sacrificing cleaning efficacy
Solution Approach 2:
The patent creates a composite surfactant system combining multiple ingredients with complementary properties. This composite formulation integrates biodegradable surfactants, chelating agents, and builders that work synergistically to maintain cleaning performance while ensuring environmental compatibility and biodegradability
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 composition effectively minimizes spotting and water solids filming, providing a stable and environmentally friendly solution for warewashing applications while maintaining effective cleaning performance.
Implementation Method 1
a solid rinse aid composition including effective amounts of a solidification system including sodium sulfate and urea
Implementation Method 2
the surfactant in the rinse agent is absorbed on the surface at temperatures at or above its cloud point, and thereby reduces the solid-liquid interfacial energy and contact angle
Implementation Method 3
the defoaming agents may include surfactants with a cloud point at or below the temperature of the rinse water, and would thereby precipitate out and modify the air/liquid interface and destabilize the presence of foam
Data Source
AI summary
The present invention is a solid rinse aid composition and methods of making and using the same. The solid rinse aid composition generally includes sodium sulfate and urea as solidification agents and an effective amount of an alcohol ethoxylate compound sheeting agent component and an effective amount of defoamer component. The solid rinse aid composition may also incorporate a preservative system including sodium bisulfate. The solid rinse aid composition may be phosphate-free, aminocarboxylate-free, and GRAS if desired.