Emulsion-Based Powder Product Freeze-Drying for Better Skin Fitness
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Solution Overview
Problem
Conventional powder product production methods result in products with a strong particle feeling, poor fitness, and issues such as makeup separation, powder floating, and allergenic effects, while using minerals that require fine grinding and have poor color rendering.
Innovation Solution
A preparation method involving mixing an oil-phase and water-phase components, followed by baking and vacuum freeze-drying under controlled conditions to form a powder product, which includes pre-freezing, sublimation drying, and desorption drying to achieve a lighter and thinner skin feeling with improved fitness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If powder pressing method is used, then production efficiency is improved, but skin feeling becomes strong and particle-like with poor fitness
Solution Approach 1:
The patent changes the physical state parameter of the powder mixture from dry particles to a liquid state containing 30%-50% oil-phase component and 50%-70% water-phase component. This parameter change enables the mixture to be baked into a smooth, skin-friendly powder product that eliminates the strong particle feeling associated with conventional pressing methods.
Solution Approach 2:
The patent utilizes phase transition by transforming the liquid powder mixture into a solidified powder base product through controlled cooling below the consolute temperature, and then into a porous solid structure through vacuum freeze-drying. This multi-stage phase transition process creates a product with superior skin fitness while maintaining production efficiency.
2Loss of time
If conventional baking method is used, then production time is reduced, but moisture content remains high and skin feeling deteriorates
Solution Approach 1:
The patent employs vacuum freeze-drying which utilizes phase transition from solid ice to water vapor through sublimation. This process efficiently removes moisture to achieve 2%-5% water content while preserving the powder base product's structure and active ingredients, overcoming the limitations of conventional baking that cannot adequately control moisture content.
Solution Approach 2:
The patent uses vacuum environment (negative pressure condition) during freeze-drying to create an inert atmosphere that prevents oxidation and degradation of ingredients while facilitating efficient moisture removal. This inert environment protects the quality of the powder product during the extended drying process.
3Illumination intensity
If minerals are used as main raw materials, then color rendering is improved, but fitness deteriorates and fine grinding is required
Solution Approach 1:
The patent creates a composite material system combining oil-phase components (fillers, emollients, antioxidants) with water-phase components (solvents, moisturizers, emulsifiers, thickeners, preservatives). This composite formulation achieves both excellent color rendering from fillers and superior fitness from moisturizing ingredients, eliminating the trade-off between color and skin compatibility.
Solution Approach 2:
The patent changes the formulation approach from mineral-based dry powders to an emulsion-based liquid system with specific oil-to-water phase ratios. This parameter change allows the incorporation of both pigmented fillers and moisturizing agents in compatible proportions, achieving dual benefits of color rendering and skin fitness without requiring fine grinding of minerals.
4Ease of manufacture
If clay is used as main raw material, then fitness is improved, but color rendering deteriorates
Solution Approach 1:
The patent formulates a composite where clay or other fillers providing fitness are combined with pigmented ingredients and emollients in the oil-phase component. This composite approach allows clay to provide skin-fitting properties while other components contribute to color rendering, resolving the contradiction between fitness and color performance.
Solution Approach 2:
The patent assigns different functional roles to different components: fillers like clay are optimized for skin fitness and texture, while separate pigmented ingredients and emollients handle color rendering and skin comfort. This local quality differentiation allows each ingredient to excel at its specific function without compromising overall performance.
5Device complexity
If powder is pressed, then production is simplified, but powder floats and flies causing allergic reactions
Solution Approach 1:
The patent changes the particle aggregation state from loose pressed powder to a densely baked solid structure formed from liquid mixture. This parameter change in density and binding reduces powder dusting and floating, minimizing inhalation risks and allergic reactions while maintaining production simplicity.
Solution Approach 2:
The baking and freeze-drying phase transitions create a solidified, bound powder structure where particles are locked in a matrix. This structural transformation eliminates the loose, dusty characteristics of pressed powders, preventing powder from floating and flying during application and storage.
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 method produces a powder product that is less prone to cakey makeup and powder floating, with a lighter skin feeling and better moisturizing effect, while retaining the components' aroma and color.
Implementation Method 1
vacuum freeze-drying under a vacuum negative pressure condition to obtain the powder product with a water content of 2% to 5%, where the vacuum freeze-drying includes pre-freezing, sublimation drying and desorption drying
Implementation Method 2
the vacuum freeze-drying includes pre-freezing, sublimation drying and desorption drying
Implementation Method 3
vacuum freeze-drying under a vacuum negative pressure condition
Implementation Method 4
baking the powder mixture liquid until its moisture content is ≤20%
Implementation Method 5
baking the powder mixture liquid until its moisture content is ≤20%
Implementation Method 6
cooling the powder base product to a predetermined temperature to obtain a solidified powder base product, wherein the predetermined temperature is lower than a consolute temperature of the powder base product
Data Source
AI summary
Provided are a preparation method for a powder product, a powder product, and a powder commodity. The preparation method for a powder product includes the following steps: mixing 30% to 50% by mass of an oil-phase component and 50% to 70% by mass of a water-phase component to form a powder mixture liquid, feeding the powder mixture liquid into a mold, and baking the powder mixture liquid until its moisture content is ≤20%, to obtain a powder base product; cooling the powder base product to a predetermined temperature to obtain a solidified powder base product; releasing the solidified powder base product from the mold, and vacuum freeze-drying under a vacuum negative pressure condition. The powder product obtained by the freeze-drying is less prone to cakey makeup or powder floating, has a lighter and thinner skin feeling, and is fitter to skin.