Cosmetic Stick With Liquid Core And Solid Gel Shell
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Solution Overview
Problem
Existing cosmetic stick products lack dynamic aesthetic appeal and effective delivery of water-soluble and fat-soluble ingredients, as more liquid formulations tend to stay on less and do not maintain visual effects due to their non-waxy structure.
Innovation Solution
A cosmetic article in stick form with a first solid or pasty product forming an outer layer and containing a second liquid product with up to 95 wt% water and a heat-sensitive viscosifying agent, such as poloxamers, which suspends decorative elements or fat-soluble dyes, allowing them to move and gel upon skin contact, preventing leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If liquid formulations are used to provide dynamic aesthetic effects and convey water-soluble active ingredients, then aesthetic appeal and ingredient delivery are improved, but the product stays on less and lacks the structure of solid sticks
Solution Approach 1:
The cosmetic stick is divided into two distinct segments: an outer transparent solid gel layer providing structure and containment, and an inner liquid cosmetic product containing water-soluble active ingredients and decorative elements. This segmentation allows each layer to fulfill its specific function independently while working together as a unified product.
Solution Approach 2:
The liquid cosmetic product is housed within the transparent solid gel outer layer, creating a nested structure where the liquid inner product is contained within the solid outer container. This nesting allows the liquid formulation to maintain its dynamic aesthetic properties while being contained within a structured framework that prevents excessive runoff.
2Reliability
If solid stick formulations are used to maintain structure and prevent leakage, then product retention is improved, but aesthetic appeal and dynamic visual effects are reduced
Solution Approach 1:
Different regions of the cosmetic stick have different physical states and properties: the outer layer is a transparent solid gel providing structural integrity and containment, while the inner layer is a liquid formulation providing dynamic aesthetic effects. Each region's local quality is optimized for its specific function.
Solution Approach 2:
The cosmetic stick combines two different material states in a single product: a transparent solid gel outer layer and a liquid cosmetic product inner layer. This composite structure integrates the advantages of both solid (structure, containment) and liquid (aesthetic effects, ingredient delivery) formulations.
3Adaptability or versatility
If decorative elements are suspended in liquid product to create dynamic visual effects, then aesthetic appeal is improved, but the elements may move or leak more easily
Solution Approach 1:
The transparent solid gel outer layer acts as an intermediary barrier between the liquid cosmetic product containing decorative elements and the external environment. This intermediary layer contains the liquid product and suspended decorative elements, preventing leakage while allowing the aesthetic effects to remain visible through the transparent gel.
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
Combines the application ease of solid sticks with the dynamic aesthetic effect of liquid formulations, ensuring the decorative elements or dyes remain contained and visible, providing a functional effect through temperature-induced gelation.
Implementation Method 1
a heat-sensitive viscosifying agent comprising poloxamers, which suspends decorative elements or fat-soluble dyes, allowing them to move and gel upon skin contact
Data Source
Figure 1~4
Figure 5~7
AI summary
The invention describes a cosmetic article, in particular for make-up, in stick form comprising a transparent external product and a liquid internal product in which solid decorative elements are dispersed. The cosmetic article features an attractive, original appearance, which can be appreciated from both an aesthetic and a functional point of view upon application thereof to skin. Class: A61K