Multi-Capsule Coating for Cosmetic Stability
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Solution Overview
Problem
Cosmetic raw materials, such as vitamin C, anthocyanin, and chlorophyll, are prone to decolorization and oxidation when exposed to air or sunlight, leading to a loss of their original functions and a change in color when applied directly to cosmetics, resulting in reduced efficacy and unsightly residue upon application.
Innovation Solution
A method for producing a multi-capsule that encases a colorant or functional component within a core, coated with a protective layer of titanium dioxide, mica, and a hydrophobic polymer to prevent moisture and oxygen exposure, ensuring the capsule breaks gently upon use, maintaining the desired color and preserving the active component's efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If cosmetic raw materials (vitamin C, anthocyanin, chlorophyll) are applied directly to cosmetic formulations, then the cosmetic can be produced simply, but the materials are easily decolorized or cause rancidification, resulting in deterioration in formulation and color change
Solution Approach 1:
The patent divides the cosmetic formulation into separate functional components: a stable carrier base (cream or lotion) and separate capsule-containing suspensions. The active components are encapsulated in capsules that can be dispersed within the cosmetic formulation, preventing direct contact between the active components and the cosmetic base, thereby preventing decolorization and rancidification while maintaining formulation simplicity.
Solution Approach 2:
The patent introduces capsules as intermediary containers that hold the active components (vitamin C, anthocyanin, chlorophyll). These capsules act as mediators between the stable cosmetic base and the sensitive active ingredients, protecting the actives from degradation while allowing them to be delivered to the skin intact. The capsules prevent direct interaction between the active components and the cosmetic formulation, maintaining both stability and efficacy.
2Shape
If colored cosmetic colorants are used, then the cosmetic achieves desired coloration, but the colorants may not maintain the inherent white color when applied directly to creams and lotions
Solution Approach 1:
The patent separates coloration functions from the cosmetic base by using capsules containing colorants. The capsules maintain their white appearance in the formulation, and the colorant is released only upon application to the skin, ensuring color stability in the cosmetic product while achieving desired coloration at the application site.
Solution Approach 2:
The patent utilizes capsules that appear white in the cosmetic formulation but contain colorant materials that are released upon skin application. This creates a color change effect where the cosmetic maintains its white appearance in the container and formulation, but the colorant activates upon contact with the skin, providing both color stability in storage and desired coloration at application.
3Ease of operation
If a capsule is designed to break easily upon application, then the active component is delivered effectively, but residue may be generated, reducing the feeling of use and making the applied surface dirty
Solution Approach 1:
The patent modifies the physical and chemical parameters of the capsule coating to optimize breakage characteristics. The capsule coating is designed with specific properties that allow controlled breakage upon skin application, releasing the active component effectively while minimizing residue generation. The coating parameters are adjusted to ensure the capsule breaks gently and completely, providing ease of application without leaving dirty residue on the skin.
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 multi-capsule effectively conceals the inner colorant, maintains the active component's stability, and ensures a clean application, maximizing the cosmetic effect by preventing residue and maintaining the original color and function of the ingredients.
Implementation Method 1
drying the coating solution prepared in step (a) while spraying the coating solution through a spray nozzle of a fluid bed dryer
Implementation Method 2
spraying the coating solution through a spray nozzle of a fluid bed dryer
Implementation Method 3
coating the outermost part of the capsule with a film which prevents moisture permeation
Data Source
AI summary
The present invention relates to a method for producing a multi-capsule, the method including steps of: (a) preparing a coating solution by mixing purified water, titanium dioxide, mica, a hydrophobic polymer, cellulose gum, and sucrose; and (b) drying the coating solution prepared in step (a) while spraying the coating solution through a spray nozzle of a fluid bed dryer after introducing a spherical seed of a colorant component for a cosmetic; or a starch or sucrose spherical seed coated with a functional component into the fluid bed dryer, a multi-capsule produced by the method, and a cosmetic composition containing the multi-capsule as an active component.