Dual Release Liner Dressing for Wrinkle-Free Sterile Application

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing thin adhesive dressings are difficult to handle and apply due to wrinkle formation and bacterial contamination risks during application, particularly in surgical settings.

Innovation Solution

A dressing design featuring two release liners, where the first liner is applied to the central portion and the second liner covers the edge portion, allowing step-wise application to prevent wrinkles and maintain sterility.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a single release liner is used to cover the adhesive skin contact layer, then the dressing can be handled during application, but the adhesive layer still wrinkles and adheres to itself after release liner removal

Engineering Contradiction:

Improvehandling during applicationVSAvoidwrinkle formation

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The release liner is divided into two separate release liners: a first release liner covering the central portion and a second release liner covering the edge portion. This segmentation allows independent removal and control of each region, preventing the adhesive layer from adhering to itself during application while maintaining ease of handling.

Inventive Principle:

Principle #1Segmentation

2Ease of operation

If the release liner is removed completely before application, then the adhesive layer can be applied to skin, but the edges of the adhesive skin contact layer tend to curl

Engineering Contradiction:

Improveapplication to skinVSAvoidedge curling

Core Design Contradiction:

Ease of operationVSShape

Solution Approach 1:

The second release liner covering the edge portion is removed first as a preliminary action before complete removal of the first release liner. This preliminary removal of the edge portion release liner prevents edge curling during the subsequent application process, while the central portion remains protected and controllable.

Inventive Principle:

Principle #10Preliminary action

3Measurement precision

If the dressing surface is touched during application to facilitate handling, then the dressing can be positioned accurately, but bacterial contamination risk increases

Engineering Contradiction:

Improvepositioning accuracyVSAvoidbacterial contamination

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The first release liner acts as an intermediary between the user's hands and the adhesive skin contact layer. It allows accurate positioning and handling of the dressing without direct contact with the sterile adhesive surface, thereby preventing bacterial contamination while maintaining positioning accuracy.

Inventive Principle:

Principle #24Intermediary (Mediator)

4Adaptability or versatility

If the adhesive skin contact layer is made thin and pliable to conform to skin contour, then it adheres better to skin, but it becomes difficult to handle and apply

Engineering Contradiction:

Improveconformance to skin contourVSAvoidhandling difficulty

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

Different regions of the adhesive skin contact layer are covered by different release liners with different removal sequences. The edge portion (covered by second release liner) is controlled to prevent curling, while the central portion (covered by first release liner) is controlled to prevent wrinkling. This local differentiation allows the thin, pliable adhesive layer to be handled easily without compromising its conformability to skin contour.

Inventive Principle:

Principle #3Local quality

Data Source

PatentEP4175596B1A dressing comprising a first and a second release liner

Publication Date: 2026.04.08 MOLNLYCKE HEALTH CARE AB

Figure 1a
Figure 1b
Figure 1c

AI summary

The present disclosure relates to a dressing (100) comprising a backing layer (101), an adhesive skin contact layer (102) and a first release liner (103), wherein the adhesive skin contact layer (102) comprises a central portion (102a) and an edge portion (102b) surrounding the central portion (102a). The first release liner (103) is configured to be releasably attached to at least the central portion (102a) of the adhesive skin contact layer (102). The dressing (100) comprises a second release liner (104) arranged between the first release liner (103) and at least part of the edge portion (102b) of the adhesive skin contact layer (102).