Cosmetic Composition Hardness Control for Application Element Sinking
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Solution Overview
Problem
Cosmetic products with high oil content face issues of application element sinking into the cosmetic, affecting usability and the ability to apply an appropriate amount, leading to impaired performance such as uneven application and reduced adhesiveness.
Innovation Solution
A cosmetic composition comprising a combination of solid wax, powder, and volatile oil agent, with a film-forming agent, which provides the necessary hardness to prevent sinking while maintaining filling moldability and allowing for easy application, including a hydrocarbon-based wax and vegetable-based wax, and a glittering powder for aesthetic and adhesive properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the hardness of the cosmetic is increased to prevent the application element from sinking, then the sinking problem is solved, but the ability to take out an appropriate amount of cosmetic is impaired and usability deteriorates
Solution Approach 1:
The patent applies parameter changes by precisely controlling the hardness of the cosmetic within the range of 0.05 to 2.0 N. This optimized parameter range resolves the contradiction by providing sufficient hardness to prevent application element sinking while maintaining softness enough to allow appropriate cosmetic removal and preserve usability.
Solution Approach 2:
The patent uses a composite material system consisting of multiple waxes (solid at 25°C and liquid at 25°C), powders, and oils in specific proportion ranges. This composite formulation achieves the desired hardness level that prevents sinking while preserving taking-out properties, resolving the contradiction between strength and ease of operation.
2Strength
If the hardness of the cosmetic is increased, then the application element does not sink, but the filling moldability and cosmetic film performance are impaired
Solution Approach 1:
The patent optimizes the hardness parameter to fall within 0.05 to 2.0 N, which is sufficient to prevent sinking during storage while maintaining the cosmetic's ability to be properly filled into molds during manufacturing and to form films with adequate performance characteristics.
Solution Approach 2:
The patent employs different types of waxes with distinct properties (solid at 25°C for structure and liquid at 25°C for flexibility) in specific proportion ranges. This local quality differentiation within the formulation allows the cosmetic to exhibit appropriate hardness for preventing sinking while maintaining filling moldability and film-forming capabilities.
3Ease of manufacture
If a lipophilic gelling agent is blended in the cosmetic, then the cosmetic can be formulated, but the hardness becomes too low causing the application element to sink
Solution Approach 1:
The patent creates a composite material system that includes lipophilic gelling agents combined with multiple waxes (solid and liquid at 25°C), powders, and oils in specifically controlled proportion ranges. This composite formulation achieves the necessary hardness to prevent application element sinking while maintaining manufacturability and other required properties.
Solution Approach 2:
The patent adjusts the formulation parameters by controlling the proportions of various ingredients within specific ranges, transforming a soft cosmetic formulation into one with adequate hardness. The balanced composition of multiple components works synergistically to achieve the target hardness level while preserving ease of manufacture.
Data Source
AI summary
A cosmetic product includes a container main body that has an opening at one end thereof and contains a cosmetic therein, and a lid that has an application tool provided with an application element at a tip portion thereof and inserted into the opening part. When the lid is attached to the container main body, the application element and the cosmetic are brought into contact with each other and the cosmetic is hermetically sealed. The cosmetic contains (A) wax which is solid at 25° C., (B) powder, (C) film-forming agent, and (D) volatile oil agent, and a content of the (C) film-forming agent is 10% to 40% by mass based on a total amount of the cosmetic.