Ostomy Base Plate Flange Composite Layer
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Solution Overview
Problem
Existing ostomy devices face issues with adhesive connections between the collecting bag and base plate, where variations in adhesive force can lead to material residue and leakage or involuntary disconnection, due to differences in tensile strength between the flanges and adhesive materials.
Innovation Solution
Incorporating a flexible layer with yield strength exceeding the adhesive strength between the adhesive and the flange with lower tensile strength, ensuring the flange is not torn out during coupling and decoupling, and maintaining a secure, leak-proof connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a soft material with low tensile strength is used for one of the coupling flanges to achieve flexibility, then the flexibility of the coupling system is improved, but the adhesive force may exceed the tensile strength of the material, causing material residue and compromising the reusability of the coupling
Solution Approach 1:
The coupling flange is constructed as a composite structure combining a soft foam material core with a flexible membrane layer having higher tensile strength. This composite construction allows the flange to maintain flexibility from the soft foam material while the membrane layer prevents material failure and residue during repeated adhesive connections, thus resolving the contradiction between flexibility and reusability.
2Reliability
If adhesive force is increased to ensure secure connection, then the connection reliability is improved, but the adhesive force may exceed the tensile strength of the softer flange material, causing deformation and tearing
Solution Approach 1:
The flange uses a composite structure where the membrane layer with higher tensile strength reinforces the soft foam material, allowing the adhesive connection to achieve high reliability without exceeding the tensile strength of the softer material, thus preventing deformation and tearing.
Solution Approach 2:
The flange is divided into functional layers: a soft foam material core for flexibility and a membrane layer for tensile strength. This segmentation allows each layer to perform its specific function, with the membrane layer bearing the tensile loads from adhesive forces while the foam core provides flexibility.
3Ease of operation
If a very soft material is used for the coupling flange to improve flexibility, then the ease of operation is improved, but residues of material and adhesive are left on the coupling surface, compromising proper functioning
Solution Approach 1:
The membrane layer with higher tensile strength acts as a protective barrier that prevents the soft foam material from deforming and leaving residues on the coupling surface. This composite structure maintains ease of operation through the soft foam material while eliminating material residue through the reinforcing membrane layer.
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
Prevents deformation and tearing of the flange material, ensures a reliable adhesive coupling without residue, and allows for repeated use without reducing the longevity of the base plate, while maintaining user-friendliness and flexibility.
Implementation Method 1
The adhesive connection is provided by at least one layer of an adhesive
Implementation Method 2
this flexible layer having a yield strength exceeding the adhesive strength of the adhesive
Data Source
AI summary
An ostomy device including a collecting bag and a base plate with an adhesive plate for being fastened on the user, the base plate having a stomal opening and a first flange for repeated and removable adhesive connection to a coupling element on the collecting bag which has a second flange. The adhesive connection is provided by at least one layer of an adhesive. Furthermore, the device includes a further flexible layer placed between the adhesive layer and the one of the first and second flanges having the lower tensile strength, the flexible layer having a yield strength exceeding the adhesive strength of the adhesive layer.