Soap Composition with Unsaturated Fatty Acids for High-Speed Extrusion
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Solution Overview
Problem
Existing soap bar production methods struggle to efficiently produce bars with excellent lather and structural integrity using unconventional fatty acid sources, while also being processable in high-speed extruders.
Innovation Solution
A soap bar composition comprising 40 to 90 wt% C16 to C24 saturated soap, 0.5 to 30 wt% C18 unsaturated soap, with a weight ratio of C16:2-C18:2 soap to C16:1-C18:1 soap higher than 0.7, and less than 5% C8 to C12 soap, optimized to achieve desired hardness, lather, and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If short chain fatty acid soaps (C8-C12) are increased to improve lather, then lather quality improves, but bar hardness decreases making the soap too soft to be processable into bars using high speed extruder
Solution Approach 1:
The invention changes the chemical composition parameters by incorporating specific unsaturated fatty acids (linoleic acid C18:2 and gamma-linolenic acid C18:3) in controlled amounts (0.1-5% and 0.1-3% respectively) to modify the soap's physical properties. This allows achieving both good lather and adequate bar hardness for high-speed extrusion processing
Solution Approach 2:
The invention creates a composite soap formulation combining multiple fatty acid components (saturated C16-C24, unsaturated C18, and specifically linoleic and gamma-linolenic acids) with synthetic surfactants. This composite approach allows the soap to exhibit both the lather-enhancing properties of short chain fatty acids and the structural integrity provided by longer chain saturated and unsaturated fatty acids
2Strength
If conventional soap-making oils (palm oil, coconut oil, palm kernel oil, tallow) are used to achieve desired bar properties, then bar hardness and lather are improved, but availability is limited due to agricultural yields, natural calamities, export control, or transportation issues
Solution Approach 1:
The invention changes the source material parameters by substituting conventional tropical oils and animal fats with alternative vegetable oils (soybean oil, corn oil, rice bran oil, cottonseed oil, safflower oil) that have different fatty acid profiles. Through careful formulation and inclusion of specific unsaturated fatty acids, the desired bar properties are achieved despite the different raw material base
Solution Approach 2:
The invention makes the soap formulation universal by designing it to work with multiple alternative oil sources that are more readily available and less susceptible to supply disruptions. The formulation accommodates varying fatty acid compositions of different vegetable oils while consistently producing bars with adequate hardness and good lather
3Ease of manufacture
If high water content is used in milled and plodded route to facilitate processing, then processability improves, but moisture content must be reduced through spray drying which increases production time and energy consumption
Solution Approach 1:
The invention changes the formulation parameters by incorporating synthetic surfactants and specific fatty acid combinations that provide adequate solubility and processing characteristics without requiring high water content. This allows the soap to be processed in high-speed extruders with reduced moisture, eliminating or minimizing the need for spray drying operations
Data Source
AI summary
Disclosed is a composition comprising C16:2-C18:2 soap; and C16:1-C18:1 soap; wherein a weight ratio of C16:2-C18:2 soap to C16:1-C18:1 soap in the composition is higher than 0.7. Also contemplated are end use compositions comprising the same.