Bag-on-Valve Cosmetic Spray Pressure Compensation
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Solution Overview
Problem
Cosmetic emulsions applied via spray applicators face challenges with stability, premature phase separation, and non-uniform spray patterns due to pressure changes over time, leading to inefficient distribution of droplets.
Innovation Solution
A cosmetic spray using an oil-in-water emulsion with polyglyceryl-10 stearate and a bag-on-valve spray applicator system, maintaining consistent pressure and spray pattern through a laminate structure and specific component concentrations, ensuring uniform distribution over the product's lifetime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the emulsion is applied directly from a pressurized reservoir using a spray applicator system, then the preparation can be sprayed, but the pressure decreases with increasing application time leading to non-uniform spray pattern and droplets falling before reaching the target
Solution Approach 1:
The invention introduces a dynamic compensation mechanism that automatically adjusts the gas pressure in response to decreasing emulsion volume. As the emulsion is consumed and pressure drops, the system maintains optimal spray characteristics by allowing pressure equalization through the balance hole, preventing the spray pattern from deteriorating over the product lifecycle
Solution Approach 2:
The invention changes the pressure parameter dynamically during operation. The balance hole enables the system to transition from a closed pressurized system to an open pressure-equalized system, allowing the internal pressure to decrease gradually as emulsion is dispensed, thereby maintaining consistent spray atomization characteristics throughout the product lifetime
2Ease of operation
If the emulsion is made thin enough to be sprayable, then it can be conveyed through the spray head, but it becomes prone to premature phase separation and instability during storage
Solution Approach 1:
The invention uses a composite packaging system combining a flexible emulsion bag with a rigid pressurized container and a dual-hole cap structure. This composite structure enables both the containment of stable emulsion and the delivery of thin, sprayable preparation by maintaining pressure differential while allowing controlled flow
Solution Approach 2:
The invention introduces gas pressure as an intermediary force that enables the conveyance of thin emulsion through the spray head without requiring the emulsion itself to be under pressure. The gas phase acts as a mediator that transmits force to move the emulsion while maintaining its stable composition
3Speed
If the spray pressure is high to ensure droplet reach, then the spray pattern is good initially, but the pressure decreases over time causing droplets to fall before reaching the target
Solution Approach 1:
The invention provides beforehand cushioning by designing a pressure compensation system that anticipates the pressure drop issue. The balance hole is pre-configured to allow pressure equalization as the product is used, cushioning against the deterioration of spray performance before it occurs and maintaining consistent droplet velocity throughout the service life
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 maintains a consistent spray pattern and distribution efficiency even as pressure decreases, preventing droplets from falling and ensuring uniform application over a larger area.
Implementation Method 1
a bag containing the O/W emulsion is in a pressurized gas container under positive pressure
Implementation Method 2
divided into small droplets ('spray mist') by the dispenser present in the spray head
Implementation Method 3
the hag containing the O/W emulsion is formed from a laminate of PE/adhesive/PA/adhesive/AL/adhesive/PET
Data Source
AI summary
The invention relates to a cosmetic spray consisting of a) an oil-in-water emulsion (O/W emulsion) containing poly glyceryl-10 stearate and b) a spray applicator system.