Solid Soap Bar Composition for Better Wash Feel and Foam Balance
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Solution Overview
Problem
There is a need for personal cleansing soap bars that offer exceptional sensory benefits, particularly in terms of in-use sensory performance such as in wash feel and moisture feel, without compromising foam quality, foam volume, after wash feel, and rinseability.
Innovation Solution
A personal cleansing soap bar composition comprising 65 to 85 wt% soap, 0.2 to 0.4 wt% aqueous ethylene acrylic acid copolymer dispersion, and 0.2 to 0.4 wt% silicone copolymer emulsion with an internal phase viscosity of ≥ 100 m²/s, along with optional humectants, processing aids, and chelating agents, is formulated and processed through milling and extrusion to create a solid soap bar.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional personal cleansing soap bars are formulated with various additives to impart inherent soap benefits, then basic cleansing function is maintained, but exceptional sensory benefits particularly in in-wash feel and moisture feel are not achieved
Solution Approach 1:
The patent combines multiple materials with complementary functions: soap (65-85 wt%) for cleansing, aqueous ethylene acrylic acid copolymer dispersion (0.2-0.4 wt%) for foam enhancement and skin conditioning, and silicone copolymer emulsion (0.2-0.4 wt%) for exceptional in-wash feel and moisture feel. This composite formulation achieves exceptional sensory benefits while maintaining basic cleansing function.
2Ease of operation
If the soap bar contains higher water content to improve sensory benefits, then in-wash feel and moisture feel are enhanced, but foam quality, foam volume, after-wash feel, and rinseability may be compromised
Solution Approach 1:
The patent optimizes the water content parameter within a specific range (10-14 wt% in the final soap bar) to balance sensory benefits with functional performance. Additionally, it controls the internal phase viscosity of the silicone copolymer emulsion at ≥100 m²/s at 25°C, which provides exceptional in-wash feel without adversely affecting foam properties, after-wash feel, or rinseability.
3Ease of operation
If the internal phase viscosity of the silicone copolymer emulsion is increased to enhance in-wash feel, then moisture feel is improved, but the formulation becomes more difficult to process and manufacture
Solution Approach 1:
The patent specifies an optimal viscosity range for the silicone copolymer emulsion (internal phase viscosity ≥100 m²/s at 25°C) that provides exceptional moisture feel while remaining processable. This parameter optimization ensures both sensory benefits and manufacturing feasibility.
Data Source
AI summary
A personal cleansing soap bar composition is provided, comprising: a soap; an aqueous ethylene acrylic acid copolymer dispersion; a silicone copolymer emulsion with an internal phase viscosity at 25°C of ≥ 100 x 106 mm2/sec; wherein the personal cleansing soap bar is a solid.