Flash Evaporation Cosmetic Spray for Propellant-Free Hair Styling
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Solution Overview
Problem
Current hair cosmetic formulations for temporary reshaping of keratin-containing fibers face challenges in achieving long-lasting hold and uniform spray application, particularly due to the limitations of pump sprays and aerosol sprays, which often rely on propellants that can be hazardous and unsuitable for long-term use.
Innovation Solution
A cosmetic product comprising 45 to 95% by weight of a polar solvent and 1.0 to 25% by weight of a fatty substance, designed for flash evaporation, which creates a spray mist suitable for targeted application, providing a high degree of hold and long-term effect through a device that heats the preparation to create overpressure and then releases it, reducing pressure to atomize the product.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If aerosol sprays with propellants are used for hair cosmetic application, then spray application is achieved, but consumer safety risks and harmful factors increase
Solution Approach 1:
The patent removes propellants from the cosmetic preparation entirely, replacing the aerosol spray mechanism with a pump spray system that delivers the composition without harmful propellant gases. This extracts the harmful element while preserving the spray application function through an alternative delivery mechanism.
Solution Approach 2:
The patent introduces a pump spray device as an intermediary mechanism between the cosmetic composition and the user, replacing the aerosol canister and propellant system. This intermediary delivers the active ingredients through a controlled spray mechanism that does not rely on propellants, thereby eliminating safety risks while maintaining application ease.
2Object-affected harmful factors
If pump sprays are used for hair cosmetic application, then propellant safety is improved, but spray application uniformity and long-lasting effect deteriorate
Solution Approach 1:
The patent modifies the physical parameters of the cosmetic composition, specifically adjusting the viscosity to within 100-10,000 cP and controlling the solvent composition (water, alcohol, glycol ethers) to optimize spray characteristics. These parameter changes enable the composition to deliver uniform spray application through a pump spray mechanism without requiring propellants.
Solution Approach 2:
The patent employs a composite formulation combining multiple solvent types (water, alcohol, glycol ethers) with specific viscosity modifiers and active ingredients. This composite material structure ensures consistent spray pattern and uniform distribution while maintaining pump spray compatibility and eliminating the need for propellants.
3Strength
If high viscosity cosmetic preparations are used for temporary shaping, then hold strength is improved, but spray atomization capability deteriorates
Solution Approach 1:
The patent precisely controls the viscosity parameter within the 100-10,000 cP range and adjusts the solvent composition ratios to achieve optimal balance between hold strength and spray atomization. This parameter optimization allows the formulation to maintain sufficient viscosity for styling hold while remaining fluid enough for effective spray delivery through a pump mechanism.
Solution Approach 2:
The patent creates a dynamic formulation where the viscosity and spray characteristics can be adjusted by modifying the solvent composition ratios. This allows the product to exhibit appropriate flow characteristics during spray application (easier atomization) while maintaining sufficient viscosity on the hair for long-lasting hold, effectively adapting the material properties to different operational states.
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 solution enables a high degree of hold and long-term effect in hair styling while eliminating the need for propellants, ensuring safer and more efficient spray application with improved thermal protection for active ingredients during the flash evaporation process.
Implementation Method 1
heating the cosmetic preparation contained in the closed container (1) to a temperature above the boiling point of the polar solvent (a1) contained in the cosmetic preparation (a), thereby creating overpressure within the cosmetic preparation (a)
Implementation Method 2
When the pressure is released (throttled), the liquid evaporates and can subsequently be atomized
Data Source
AI summary
The invention relates to a cosmetic product, comprising a) a cosmetic preparation, containing, in relation to its total weight, a1) 45 to 95 wt.% of at least one polar solvent; a2) 0.1 to 25 wt.% of at least one solid material; b) a device for flash evaporation of the cosmetic preparation a), and to a method using corresponding products and to the use of the cosmetic preparation a) as process material in a device for flash evaporation.