Double-Structure Aerosol Container for Surfactant-Free Two-Liquid Mixing
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Solution Overview
Problem
Existing two-liquid mixing-type aerosol products face challenges in maintaining formulation stability and causing skin irritation due to the need for surfactants, which also result in an uncomfortable sticky feeling during application.
Innovation Solution
A double-structure container with a discharging mechanism that simultaneously breaks down two immiscible liquid concentrate compositions into fine droplets as mists, eliminating the need for surfactants and allowing for uniform application without skin irritation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If surfactant is added to emulsify water-based and oil-based liquid compositions, then the liquid cosmetic formulation can be formed as an emulsion composition, but skin irritation and sticky feeling are caused at application sites
Solution Approach 1:
The invention divides the single emulsion system into two separate immiscible liquid compositions stored in the same container. The water-based liquid composition and oil-based liquid composition remain separated until application, eliminating the need for surfactants and preventing skin irritation while maintaining formulation stability.
Solution Approach 2:
The invention extracts and removes the surfactant component from the formulation system. By using two separate immiscible liquid compositions without surfactants, the harmful emulsifying agents are completely eliminated, preventing skin irritation and sticky feeling at application sites.
2Quantity of substance
If a large amount of oil medium is added to dissolve ultraviolet absorbing component in sunscreen formulations, then the ultraviolet absorbing component can be effectively dissolved, but a large amount of surfactant is needed when water is added, causing skin irritation and sticky feeling
Solution Approach 1:
The invention segments the sunscreen formulation into two separate immiscible liquid compositions: one containing the oil medium and ultraviolet absorbing component, and another containing water-based ingredients. This separation eliminates the need for surfactants to emulsify the mixture, preventing skin irritation and sticky feeling while maintaining effective UV protection.
3Stability of the object's composition
If water-based liquid composition and oil-based liquid composition are separated in a container, then formulation stability is maintained, but mixing the two compositions on the palm before application is burdensome and causes sticky feeling
Solution Approach 1:
The invention replaces the manual mechanical mixing operation with an automated aerosol dispensing system. The aerosol mechanism automatically mixes the two immiscible liquid compositions and delivers them as a fine mist, eliminating the need for manual palm mixing and reducing skin irritation from excessive rubbing.
Solution Approach 2:
The invention utilizes the phase transition from liquid to aerosol mist. The two immiscible liquid compositions are discharged as a fine aerosol mist, which naturally mixes and evaporates on the skin surface, eliminating the need for manual mixing and reducing sticky feeling.
4Adaptability or versatility
If emulsion composition is used to contain both water-soluble and oil-soluble active ingredients, then both types of active ingredients can be incorporated, but formulation stability deteriorates during long-term storage
Solution Approach 1:
The invention segments the active ingredients into two separate immiscible liquid compositions based on their solubility characteristics. Water-soluble active ingredients are dissolved in the water-based liquid composition, while oil-soluble active ingredients are dissolved in the oil-based liquid composition. Both compositions are stored separately in the same container, maintaining formulation stability while allowing incorporation of multiple active ingredients.
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 provides high formulation stability and comfort during use by ensuring a consistent mixture ratio of the two liquid compositions, preventing sticky feelings and allowing for efficient, uniform application of active ingredients.
Implementation Method 1
the discharging mechanism has a function for breaking the first liquid concentrate composition and the second liquid concentrate composition down into fine droplets and discharging the liquid concentrate compositions as mists
Implementation Method 2
the propellant filling space in the double-structure container is filled with a propellant composed of a compressed gas
Data Source
Figure 1~2
AI summary
The present invention has as its object the provision of a two-liquid mixing-type aerosol product having high formulation stability, being capable of easily forming a discharge material having a desired composition, and providing comfort during use when it is applied to the human body. A two-liquid mixing-type aerosol product of the present invention has a double-structure container including a propellant filling space and two liquid concentrate filling spaces and having a discharging mechanism for simultaneously discharging the contents filled in the two liquid concentrate filling spaces. The propellant filling space is filled with a propellant composed of a compressed gas. A first liquid concentrate filling space is filled with a first liquid concentrate composition having a viscosity of 1 to 1000 mPa·s at a temperature of 20°C. A second liquid concentrate filling space is filled with a second liquid concentrate composition having a viscosity of 1 to 1000 mPa·s at a temperature of 20°C. The discharging mechanism has a function for breaking the first liquid concentrate composition and the second liquid concentrate composition down into fine droplets and discharging these liquid concentrate compositions as mists.