Solid Cleansing Bar Grit Reduction via Fatty Acid Parameter Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Combination bars in the form of solid cleansing compositions face challenges in reducing or eliminating grit formation, which affects their user experience and production costs due to differences in solubility and melting temperatures of their components, making it difficult to formulate and produce bars with high soap content without grittiness.
Innovation Solution
A cleansing composition comprising 1-15 wt% of C8-C22 fatty acid, 2-25 wt% of isethionate ester surfactant, 0.5-7.5 wt% of alkyl isethionate ester surfactant, and 52.5-95 wt% of soap, which reduces or eliminates grit formation when contacted with water at temperatures of 20-40°C, allowing for conventional manufacturing processes and improved user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If combo bars are formulated with high levels of soap and low levels of synthetic detergent to reduce cost and pH, then production costs are kept low and irritation is reduced, but grit formation occurs under running water at temperatures of 20-40°C
Solution Approach 1:
The patent modifies the chemical composition parameters by incorporating specific fatty acids (C8-C22) in controlled amounts (1-15 wt%) alongside the soap-synthetic detergent mixture. This parameter adjustment changes the solubility and melting characteristics of the bar components, preventing grit formation while maintaining the cost-effective high soap formulation.
Solution Approach 2:
The invention creates a composite cleansing bar by combining multiple components with different properties: soap (for cost-effectiveness and cleansing), synthetic detergent (for pH control and mildness), and specific fatty acids (for grit prevention). This composite structure allows the bar to exhibit reduced grit formation while maintaining the benefits of both soap and synthetic detergent.
2Reliability
If combo bars are formulated with high levels of soap to provide good cleansing, then cleansing performance is improved, but grit formation occurs making the bar unattractive to users
Solution Approach 1:
The patent adjusts the compositional parameters by adding specific fatty acids (C8-C22) in amounts of 1-15 wt% to the high soap formulation. This parameter change modifies the physical properties of the bar, specifically preventing the separation and grit formation that would otherwise occur in high soap content bars under running water.
Solution Approach 2:
The specific fatty acids act as intermediary substances between the soap and water, modifying the interaction at the bar surface. These fatty acids prevent the direct contact and friction between soap particles and water that causes grit formation, while allowing the soap to maintain its effective cleansing action.
3Ease of manufacture
If conventional manufacturing processes are used for combo bars, then production is simplified, but grit formation occurs due to different solubilities and melting temperatures of components
Solution Approach 1:
The patent changes the compositional parameters by incorporating specific fatty acids (C8-C22) in controlled amounts (1-15 wt%). This parameter modification allows the use of conventional manufacturing processes while achieving precise control over grit formation, as the fatty acids adjust the solubility and melting point characteristics of the bar components.
Solution Approach 2:
The invention applies local quality by adding specific fatty acids to particular regions of the bar composition (1-15 wt% of total formulation). This localized compositional adjustment addresses the grit formation issue at the molecular level within the bar structure, allowing conventional manufacturing to produce grit-free bars without requiring complex process modifications.
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 provides effective cleansing and foaming while being mild to the skin and hair, maintaining processability and hardness, and can be produced using standard equipment at lower costs, reducing grit formation and enhancing user perception.
Implementation Method 1
isethionate ester surfactant of the formula (I) and alkyl isethionate ester surfactant of the formula (II)
Data Source
Figure 1
AI summary
A solid cleansing composition which comprises a high proportion of soap and exhibits reduced or eliminated grit formation and which can be made by conventional manufacturing processes. The composition comprises soap, C8-22 fatty acid, at least one isethionate ester surfactant, and at least one alkyl isethionate ester surfactant.