Cationic Fiber Coating for Mascara Adhesion and Volume
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Solution Overview
Problem
Conventional mascara products fail to effectively adhere fibers to eyelashes, eyebrows, or hair, leading to poor adhesion, clumping, flaking, and irritation, while also being difficult to remove and lacking in water-resistance.
Innovation Solution
Cationically-charged particulates, such as fibers, are coated with a cationically-charged material and optionally a film-former to enhance adhesion and hydrophobicity, ensuring they adhere well to negatively charged keratinous materials without clumping or flaking, and are designed to be water-resistant.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fibers are drawn out of a receptacle, then they become statically-charged and repel one another, but this causes them to fly about and fail to adhere properly to eyelashes
Solution Approach 1:
A cationic polymer coating is applied to the fibers as an intermediary layer. This coating neutralizes the negative static charge that develops when fibers are drawn from the receptacle, preventing repulsion and flyaway while maintaining the fibers' ability to adhere to negatively charged keratinous materials like eyelashes.
Solution Approach 2:
The surface charge parameter of the fibers is changed by coating them with a cationic material. This transforms the fibers from negatively charged (which causes repulsion) to positively charged or neutral, enabling them to adhere to the negatively charged surface of eyelashes without flying about.
2Reliability
If conventional mascara products are applied to eyelashes, then they may provide some volume, but they fail to adhere properly and tend to flake off causing irritation
Solution Approach 1:
The fibers are coated with a cationic polymer that gives them a positive charge. Since eyelashes have a negative charge on their surface, the electrostatic attraction between the cationic fibers and anionic eyelash surface dramatically improves adhesion, preventing flaking and the associated irritation.
Solution Approach 2:
The invention uses composite fibers consisting of a core material (such as cellulose or synthetic fiber) coated with a cationic polymer layer. This composite structure combines the volumizing properties of the fiber core with the adhesion properties of the cationic coating, achieving both volume and reliable attachment.
3Quantity of substance
If mascara products contain fibers, waxes, and filler agents to achieve volume, then the desired cosmetic effect is improved, but the processibility of the formula is reduced and it becomes difficult to load and deliver product from the brush
Solution Approach 1:
The fibers are coated with a cationic polymer that modifies their surface properties, making them more compatible with the mascara formula. This coating reduces fiber-fiber aggregation and improves dispersion throughout the formula, maintaining smooth processibility and easy brush loading while still providing the desired volume effect.
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 cationically-charged particulates demonstrate improved adhesion to eyelashes, eyebrows, and hair, providing superior volume and length without clumping or flaking, and are easy to remove, while maintaining water-resistance.
Implementation Method 1
cationically-charged particulates... for application to negatively charged keratinous materials
Implementation Method 2
The particulates are optionally coated with a film-former finish material to further seal the canonically-charged coating to the particulates and to render the particulates hydrophobic
Data Source
AI summary
Cationically-charged particulates and compositions containing the cationically-charged particulates for application to keratinous materials are provided. Methods of preparing the cationically-charged particulates are also disclosed.