Aqueous Manicure Formulation with Crystalline Cellulose
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Solution Overview
Problem
Conventional aqueous manicure preparations face challenges in drawing fine lines and patterns on nails due to high viscosity, settling of tabular pigments, and cissing issues, while existing applicators are prone to defects like spilling and clogging.
Innovation Solution
An aqueous manicure preparation with a specific composition, including water, water-soluble resin, emulsion resin, moisturizing agent, fungicide, and crystalline cellulose, is formulated to achieve optimal viscosity and surface tension, combined with a capillary-driven applicator design featuring a conical tip and porous structure to ensure stable pigment dispersion and smooth application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional aqueous manicure preparations are formulated with tabular pigments to achieve pearly brilliance, then the cosmetic appearance is improved, but the viscosity increases and the pigments settle down forming hard cakes
Solution Approach 1:
The patent introduces a specific thickening agent as an intermediary substance that mediates between the tabular pigments and the aqueous medium. This thickening agent creates a stable dispersion system that prevents pigment settling while maintaining the pearly brilliance effect, resolving the contradiction between cosmetic appearance and composition stability.
Solution Approach 2:
The patent optimizes the viscosity parameters of the aqueous manicure preparation by carefully controlling the concentration and type of thickening agent. By adjusting the viscosity to a specific range, the preparation maintains low enough viscosity for fine line drawing while high enough to prevent pigment settling, thus resolving the contradiction between applicability and stability.
2Ease of operation
If the viscosity of aqueous manicure preparations is reduced to enable fine line drawing, then the ease of operation is improved, but cissing occurs in narrow drawn lines
Solution Approach 1:
The patent precisely controls the viscosity parameters of the preparation to fall within a specific optimal range. This parameter optimization allows the cosmetic to flow smoothly for fine line drawing while maintaining sufficient surface tension to prevent cissing, thereby resolving the contradiction between ease of operation and drawing quality reliability.
3Ease of manufacture
If conventional brushes are used for applying manicure preparations, then the ease of manufacture is improved, but spilling occurs when drawing lines
Solution Approach 1:
The patent divides the applicator into distinct functional segments: a reservoir for holding the preparation and a separate application tip for precise line drawing. This segmentation allows the applicator to maintain simplicity in manufacture while achieving precision in operation, as the tip can be designed specifically for fine line control while the body remains simple.
4Strength
If fiber bundles are fixed with binders to create pen feeds, then the structural stability is improved, but tabular pigments cause clogging
Solution Approach 1:
The patent employs a porous structure in the pen feed that allows tabular pigments to pass through without clogging. The porous material maintains structural stability while providing sufficient open space and appropriate pore size distribution to accommodate the flow of pigment-laden cosmetic, thereby resolving the contradiction between structural strength and pigment flowability.
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 excellent aging precipitation stability, prevents hard cake formation, allows easy redispersement, and enables precise drawing of fine lines and patterns without cissing or dripping, enhancing usability and finishing quality.
Implementation Method 1
a capillary-driven applicator design featuring a conical tip and porous structure to ensure stable pigment dispersion and smooth application
Data Source
Figure 1
Figure 2(a)~2(b)
Figure 3
AI summary
Provided are an aqueous manicure preparation which is excellent in aging precipitation stability and less liable to form a hard cake even when a tabular pigment settles down to make it possible to readily redisperse it by stirring and which is excellent in usability to make it possible to readily draw fine lines and patterns on a nail and excellent in a finishing property and an aqueous manicure preparation-filled applicator. The aqueous manicure preparation is an aqueous cosmetic preparation for a nail art characterized in that in an applicator which is equipped with at least a liquid storing part and an applying member and in which a liquid is transported from the liquid storing part to the applying member by virtue of capillary force, the aqueous manicure preparation stored in the liquid storing part described above contains at least water, a water-soluble resin, a tabular pigment, an emulsion resin, a moisturizing agent and a fungicide and that it further contains crystalline cellulose and is provided with a viscosity satisfying the following condition (A) in measuring the viscosity at a temperature of 25°C by means of a cone plate type viscometer: (A) shear rate (s -1 ) viscosity (mPa·s) 3.83 30 to 150 19.15 10 to 50 38.30 10 to 40 76.60 10 to 40 383.00 5 to 20