Two-Layer Bandage With Separable Adhesive Layers

Solution Overview

Problem

Conventional bandages often cause wound re-injury and potential infection when replaced, as the aggressive skin adhesive can reopen the wound, leading to fresh bleeding and discomfort during the process of changing the bandage.

Innovation Solution

A two-layer bandage design featuring a first layer with strong skin adhesion for wound coverage and a second layer with minimal adhesion for easy removal, incorporating an absorbent pad and a pull tab to replace the second layer without disturbing the first layer or the wound, allowing for blood and fluid flow while minimizing reopening.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a single layer bandage with strong adhesive is used to secure the bandage to skin, then the bandage adheres firmly to the wound area, but the adhesive can reopen the wound causing fresh bleeding and potential infection when the bandage is removed or replaced

Engineering Contradiction:

Improveadhesive strengthVSAvoidwound re-injury and infection risk

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The bandage is divided into two distinct layers: a first layer with strong adhesive for secure attachment to skin, and a second layer with minimal adhesive for easy, pain-free removal. This segmentation allows each layer to perform its specific function without compromising wound integrity during removal.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The harmful aggressive adhesive is extracted from the second layer, which contacts the wound area. Only the first layer retains strong adhesive properties, while the second layer uses minimal or no adhesive, eliminating the source of wound re-injury during removal.

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If a bandage with strong adhesive is used to maintain grip on the bandaged area, then the bandage stays in place during movement, but the adhesive can reopen the wound causing fresh bleeding during bandage replacement

Engineering Contradiction:

Improvebandage retentionVSAvoidwound reopening and bleeding

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The bandage is divided into two distinct layers: a first layer with strong adhesive for secure attachment to skin, and a second layer with minimal adhesive for easy, pain-free removal. This segmentation allows each layer to perform its specific function without compromising wound integrity during removal.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The harmful aggressive adhesive is extracted from the second layer, which contacts the wound area. Only the first layer retains strong adhesive properties, while the second layer uses minimal or no adhesive, eliminating the source of wound re-injury during removal.

Inventive Principle:

Principle #2Taking out (Extraction)

3Quantity of substance

If a bandage requires periodic change providing fresh gauze or absorbent material, then the absorbent material can be refreshed to maintain wound care, but the removal process can reopen the wound causing fresh bleeding and potential infection

Engineering Contradiction:

Improveabsorbent material freshnessVSAvoidwound re-injury and infection risk

Core Design Contradiction:

Quantity of substanceVSObject-affected harmful factors

Solution Approach 1:

The bandage is divided into two distinct layers: a first layer with strong adhesive for secure attachment to skin, and a second layer with minimal adhesive for easy, pain-free removal. This segmentation allows each layer to perform its specific function without compromising wound integrity during removal.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The harmful aggressive adhesive is extracted from the second layer, which contacts the wound area. Only the first layer retains strong adhesive properties, while the second layer uses minimal or no adhesive, eliminating the source of wound re-injury during removal.

Inventive Principle:

Principle #2Taking out (Extraction)

4Ease of operation

If a two layer bandage design is used with different adhesion properties, then the second layer can be removed without disturbing the first layer or wound, but the device complexity increases

Engineering Contradiction:

Improvebandage replacement easeVSAvoidbandage structure complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The bandage is divided into two distinct layers: a first layer with strong adhesive for secure attachment to skin, and a second layer with minimal adhesive for easy, pain-free removal. This segmentation allows each layer to perform its specific function without compromising wound integrity during removal.

Inventive Principle:

Principle #1Segmentation

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

Enables pain-free and infection-reducing bandage replacement that maintains wound protection and promotes healing without re-opening the wound during changes, reducing the risk of infection and inflammation.

Implementation Method 1

a region with absorbent pad or gauze for configuring and positioning the pad over the first layer opening facing the wound for absorbing any blood effluent transporting through the first layer opening boundary

Methodology Applied

Scientific EffectAbsorption: Absorption (physical)

Implementation Method 2

The first layer has a first side having strong skin adhesion properties for adhering a bandage to tissue

Methodology Applied

Scientific EffectAdhesion: Adhesive

Data Source

PatentUS11471334B2Two layer bandage

Publication Date: 2022.10.18 LEVY PETER L

AI summary

A two layer bandage with a hole or opening larger than the wound area for a first layer in contact with the skin is shown and a second layer which carries an absorbent portion cover wound just above the open portion of the first layer. The absorbent is imbedded or attached in the body of the second layer such that the absorbent portion of the bandage can be replaced without disturbing the wound.