Shaving Stick Composition Hardness and Deposit Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing shaving compositions fail to maintain a consistent hardness suitable for stick form while ensuring sufficient deposition and stability for effective shaving, especially in situations without electricity or water.
Innovation Solution
A cosmetic shaving composition comprising 15-25% C16-C20 fatty acids, 1.5-2.7% sodium hydroxide, and 1-8% triethanolamine, providing a hardness of 260-1200 g, stability, and adequate covering power, allowing for a creamy foaming deposit without propellant gas and suitable for compact, inexpensive packaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the composition is formulated in stick form to improve portability and compactness, then it becomes hard enough for stick formulation, but it becomes too hard to provide sufficient deposit for effective shaving
Solution Approach 1:
The patent applies parameter changes by precisely controlling the composition ratios of fatty acids (15-25%), sodium hydroxide (1.5-2.7%), and triethanolamine (1-8%) to achieve an optimal hardness range (260-1200 g) that enables stick formulation while maintaining adequate deposit capability for effective shaving
2Quantity of substance
If the composition is made softer to improve deposit and shaving performance, then it provides sufficient covering power, but it becomes too soft to maintain stick form
Solution Approach 1:
The patent resolves this contradiction by adjusting the chemical composition parameters, specifically the balance between fatty acids, sodium hydroxide, and triethanolamine, to achieve a hardness range that simultaneously maintains stick form integrity and provides sufficient deposit for effective shaving coverage
3Ease of operation
If propellant gas is used to enable aerosol dispensing, then application is easier, but packaging becomes more expensive and polluting
Solution Approach 1:
The patent extracts and eliminates propellant gas from the system, replacing aerosol dispensing with direct stick application. This simplifies packaging, reduces costs, and decreases environmental pollution while maintaining effective product application through the optimized composition formula
4Ease of operation
If hands contact the composition during application, then application is more controlled, but hands require rinsing after use
Solution Approach 1:
The patent implements self-service by designing the stick composition to be applied without hand contact, allowing users to directly apply the product to the shaving area using the stick itself. This eliminates the need for subsequent hand rinsing while maintaining controlled and precise application
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 maintains stability and provides sufficient coverage for effective shaving with three passes, preventing melting or crystallization, and can be used as a compact, portable shaving and aftershave product without the need for rinsing hands.
Implementation Method 1
The composition according to the invention is an emulsion obtained from two soaps, one based on sodium, the other based on TEA, derived from the in-situ neutralization of C 16 - C 20 fatty acid(s)
Data Source
AI summary
Composition, in particular cosmetic composition, intended especially for shaving the skin, preferably facial skin, characterized in that it comprises: from 15% to 25% by weight of at least one C16-C20 fatty acid relative to the total weight of the composition, from 1.5% to 2.7% by weight of sodium hydroxide relative to the total weight of the composition, from 1% to 8% by weight of triethanolamine relative to the total weight of the composition.