Sheet Mask Gel Composition for Adhesion Over Layered Skincare

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Solution Overview

Problem

Conventional mask sheets, including hydrogel masks, suffer from low adhesive strength when applied over water-soluble or oil-soluble compositions, rapid moisture evaporation, and difficulty in delivering active ingredients due to high water content and microbial contamination, making them unsuitable for layering skincare methods.

Innovation Solution

A sheet-type mask gel composition comprising an emulsion of butters, oils, waxes, surfactants, and polyols, with a lamellar structure and low water content, which maintains adhesive strength even after application over skincare products and ensures effective delivery of active ingredients.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If hydrogel mask sheet with high water content is used, then moisturizing ability is improved, but adhesive strength decreases and microbial contamination risk increases

Engineering Contradiction:

Improvewater contentVSAvoidadhesive strength

Core Design Contradiction:

Quantity of substanceVSStrength

Solution Approach 1:

The patent changes the fundamental parameter of the mask sheet composition from water-based hydrogel to oil-based gel. Specifically, it uses a gel composition comprising 5-50 wt% of a gel former, 40-80 wt% of oil, and 5-40 wt% of polyol, thereby eliminating water content while maintaining gel structure and moisturizing properties through alternative ingredients.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite gel system by combining gel formers (such as carbomers or cellulose derivatives) with oil phases and polyols. This composite structure provides both the gel network for moisture retention and the oil-based matrix for adhesive strength, resolving the contradiction between moisturizing ability and adhesion.

Inventive Principle:

Principle #40Composite materials

2Reliability

If butters, oils, and waxes are added to deliver active ingredients, then efficacy is improved, but ingredients may leak during distribution

Engineering Contradiction:

Improveactive ingredient deliveryVSAvoidcomposition stability

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The patent changes the physical state and concentration parameters of active ingredients. By using a high-concentration gel formulation with specific viscosity control through gel formers and polyols, the patent maintains active ingredients (including butters, oils, and waxes) in a stable, non-leaking state during distribution while ensuring effective delivery to the skin.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent introduces gel formers and polyols as intermediary substances that mediate between the active ingredients (butters, oils, waxes) and the mask sheet structure. These intermediaries create a stable matrix that prevents leakage while facilitating controlled release and delivery of active ingredients to the skin.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Loss of time

If mask sheet is left at room temperature for extended period, then convenience is improved, but moisture evaporates and adhesive strength decreases

Engineering Contradiction:

Improvestorage time before useVSAvoidmoisture content

Core Design Contradiction:

Loss of timeVSQuantity of substance

Solution Approach 1:

The patent fundamentally changes the composition from water-based to oil-based, replacing moisture that would evaporate with oil phases that are stable at room temperature. The gel composition maintains its structure and active ingredient content over extended storage periods without significant evaporation loss, thereby improving convenience while maintaining efficacy.

Inventive Principle:

Principle #35Parameter changes

4Reliability

If mask sheet is applied over cream or essence (layering method), then skincare efficacy is improved, but adhesive strength significantly decreases

Engineering Contradiction:

Improveskincare efficacyVSAvoidadhesive strength

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The patent creates a universal mask sheet composition that functions effectively both as a standalone treatment and as a layering product. The oil-based gel formulation adheres well to various skincare products (creams, essences) while maintaining its own active ingredient delivery capability, thereby providing multi-functionality that supports both direct application and layering methods.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 composition provides excellent adhesive strength, maintains moisture retention, and effectively delivers active ingredients to the skin, even after prolonged use, suitable for layering skincare methods without significant loss of adhesiveness.

Implementation Method 1

an emulsion composition, a polyol, and a thickener... wherein the emulsion composition is 'at least one selected from butters, oils, waxes, and a combination thereof,' 'a surfactant' and 'a polyol'

Methodology Applied

Scientific EffectLamellar structure formation: Self-Assembly

Data Source

PatentUS12496259B2Sheet-type mask gel composition, mask sheet comprising the same and manufacturing method of mask sheet

Publication Date: 2025.12.16 AMOREPACIFIC CORP

AI summary

Disclosed are a sheet-type mask gel composition, mask sheet including the same and a method of manufacturing the mask sheet. The sheet-type mask gel composition includes an emulsion composition, a polyol, and a thickener, wherein the emulsion composition includes at least one selected from butters, oils, waxes, and a combination thereof, a surfactant and a polyol.