Bacterial Cellulose Eye Patch for Moisture Retention

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Solution Overview

Problem

Existing eye patches lack effective moisturizing properties, have complex compositions, and limited biocompatibility, which restricts their applicability and increases costs.

Innovation Solution

A medical moisturizing eye patch composed of a protective silica gel film, a gel layer made from purified and bleached bacterial cellulose wet film combined with glycerol, sodium hyaluronate, and Nipagin ester, and a backing layer of non-woven fabric, with a high water content and weight per square meter for enhanced moisturizing and antibacterial effects.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If cosmetic substances and nano gold-platinum sheet are added to provide anti-oxidation and anti-aging effect, then the anti-wrinkle effect is improved, but the cost increases and the components are not natural substances

Engineering Contradiction:
Improveanti-wrinkle effectVSAvoidcomposition complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent changes the chemical composition parameters by replacing synthetic cosmetic substances with natural plant extracts (Silybum marianum, Centella asiatica, Aloe vera) and natural metals (silver, zinc, copper), thereby simplifying the composition while maintaining or improving the anti-wrinkle effect through natural mechanisms

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent replaces expensive nano gold-platinum sheet with more affordable natural plant extracts and common metal ions (silver, zinc, copper) that provide similar or superior biological activities at lower cost, making the product more accessible while maintaining effectiveness

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

2Ease of manufacture

If bacterial cellulose film is purified and directly cut to be the eye patch, then the preparation process is simplified, but the moisturizing effect is poor because it does not contain moisturizing measures

Engineering Contradiction:
Improvepreparation process simplicityVSAvoidmoisturizing effect
Core Design Contradiction:
Ease of manufactureVSReliability

Solution Approach 1:

The patent creates a composite structure by combining bacterial cellulose film with gel layers containing plant extracts and moisturizing agents, thereby maintaining the simplicity of bacterial cellulose preparation while adding moisturizing functionality through the gel component

Inventive Principle:
Principle #40Composite materials

Solution Approach 2:

The patent merges the bacterial cellulose base material with gel layers containing moisturizing plant extracts, combining the structural benefits of bacterial cellulose with the moisturizing properties of natural gels to achieve both ease of manufacture and effective moisturizing

Inventive Principle:
Principle #5Merging (Combining)

3Reliability

If the eye patch is made with high liquid content (90-98%), then the moisturizing effect is improved, but the structural stability and handling difficulty increase

Engineering Contradiction:
Improvemoisturizing effectVSAvoidhandling ease
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The patent uses bacterial cellulose film as a flexible yet structurally sound base that can contain high liquid content in gel layers while maintaining enough integrity for handling and application, leveraging the unique mechanical properties of bacterial cellulose

Inventive Principle:
Principle #30Flexible shells and thin films

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 eye patch achieves excellent biocompatibility, lasting moisturizing effects, improved skin moisture retention, antibacterial properties, and simplicity in preparation and application, addressing the limitations of previous eye patches.

Implementation Method 1

bacterial cellulose wet film composited with a moisturizing agent... excellent water absorption and water locking effect

Methodology Applied
Scientific EffectHydrophilic absorption: Absorption (physical)

Implementation Method 2

glycerol, sodium hyaluronate... improved skin moisture retention

Methodology Applied
Scientific EffectHydrogen bonding:

Implementation Method 3

protective layer made of a silica gel film which is vapour permeable water resistant

Methodology Applied
Scientific EffectVapor permeability: Permeation

Implementation Method 4

Nipagin ester... antibacterial function

Methodology Applied
Scientific EffectAntibacterial action: Preservative

Data Source

PatentUS12285530B2Medical moisturizing eye patch and preparation method thereof
Publication Date: 2025.04.29 ZHENDE MEDICAL CO LTD
  • US12285530B2 patent drawing

AI summary

The disclosure relates to a medical moisturizing eye patch with excellent biocompatibility and lasting moisture retention and a preparation method thereof, in which firstly, the standing cultured bacterial cellulose film is purified and bleached; then, the bleached bacterial cellulose wet film is composited with a moisturizing agent; then, a mechanical pressing is made to be with a proper liquid content; and finally, a cutting is made to obtain the eye patch with a proper size, which has excellent biocompatibility, high water holding capacity, high purity, high wet strength and excellent flexibility, excellent water absorption and water locking effect, improved skin moisture content, good air permeability, antibacterial function and no side-effect. The preparation method in the disclosure is simple and easy to realize; and the eye patch can be directly applied after peeling away the backing layer in use.