Cosmetic Gel Sheet Water Content and Adhesion
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Solution Overview
Problem
Conventional cosmetic gel sheets with high water content are prone to slipping and cause discomfort due to coldness, especially in winter, and lack mechanical strength for effective skin attachment.
Innovation Solution
A cosmetic gel sheet with a water content of 30% by weight or less, utilizing carboxy group-containing water-soluble polymers and polyalcohols, which are pseudo-crosslinked to achieve sufficient mechanical strength and a comfortable warm-feeling upon hydration, eliminating the need for water-soluble divalent ions and allowing for enhanced skin absorption of valuable components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional gel sheets contain a large amount of water, then they can provide moisturizing effects, but they slip down and cause cold discomfort
Solution Approach 1:
The patent changes the water content parameter from conventional high levels (70-90%) to a controlled range of 10-50%, and introduces a specific polymer composition ratio (hydrophilic polymer 1-50 parts, polysaccharide 1-50 parts, polyalcohol 10-500 parts) to achieve both moisture retention and improved adhesion without slipping
Solution Approach 2:
The patent creates a composite gel sheet material combining hydrophilic polymer, polysaccharide, and polyalcohol in specific proportions. This composite structure provides mechanical strength for adhesion while maintaining moisture content, resolving the contradiction between water content and adhesion reliability
2Quantity of substance
If conventional gel sheets contain a large amount of water, then they can maintain gel structure, but they lack mechanical strength for effective skin attachment
Solution Approach 1:
The patent develops a composite material system with hydrophilic polymer (1-50 parts), polysaccharide (1-50 parts), and polyalcohol (10-500 parts) that provides structural framework and mechanical strength. This composite structure enables the gel sheet to maintain integrity and adhesion strength even with reduced water content (10-50%), eliminating the need for water-soluble divalent ions for crosslinking
Solution Approach 2:
The patent changes the compositional parameters by limiting water content to 10-50% and specifying precise ratios of polymer components, which collectively provide the necessary mechanical strength for skin attachment without relying on high water content or ionic crosslinking
3Stability of the object's composition
If conventional gel sheets use crosslinking agents to maintain structure, then they can provide gel stability, but they require water-soluble divalent ions which complicates the formulation
Solution Approach 1:
The patent extracts and eliminates the need for water-soluble divalent ions and external crosslinking agents from the formulation. Instead, it relies on the intrinsic properties of the polymer-composite network and controlled water content (10-50%) to maintain gel stability, thereby simplifying the formulation while achieving stable gel structure
Solution Approach 2:
The patent enables the gel sheet to self-maintain its structure through the synergistic interaction of hydrophilic polymer, polysaccharide, and polyalcohol components. The system self-regulates its gel stability without requiring external crosslinking agents or divalent ions, reducing formulation complexity while maintaining structural integrity
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 gel sheet provides improved adhesion, mechanical strength, and a warm-feeling without the need for water-soluble ions, ensuring effective skin absorption and prolonged moisture retention, addressing the issues of slipping and cold discomfort in conventional hydrogel sheets.
Implementation Method 1
utilizing carboxy group-containing water-soluble polymers and polyalcohols, which are pseudo-crosslinked to achieve sufficient mechanical strength
Implementation Method 2
the alcohol generates heat by hydration to give a comfortable feeling to skin when the skin is massaged with water (hot water) after application of the gel sheet
Implementation Method 3
when the skin is massaged, the gel is dissolved, so the blended component is penetrated into the skin
Data Source
AI summary
A cosmetic gel sheet suitable for a cosmetic field or a medical field is provided.The cosmetic gel sheet of the present invention contains carboxy group-containing water-soluble polymer, polyalcohol, and acid as essential constituent components. Carboxy group-containing polysaccharide can be suitably used as the carboxy group-containing water-soluble polymer. Water content in the gel sheet is 30% by weight, but it is more preferable if the water content is 10% by weight or less. In the cosmetic gel sheet of the present invention, the gel sheet can be manufactured by drying an aqueous solution containing carboxy group-containing water-soluble polymer, polyalcohol, and acid as essential components. Wherein, it is desirable that content of the acid in the aqueous solution is adjusted to a value appropriate for setting pH of the aqueous solution to 2.0-4.0.