Convex Stoma Chassis Welding Ring Adhesive Protection
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Solution Overview
Problem
Convex stoma chassis designs on the market face issues with excrement leakage and hot melt adhesive erosion, leading to reduced service life and increased nursing workload.
Innovation Solution
A convex stoma chassis with a welding ring positioned between the plastic part and the backing, combined with a rubber disc, hydrocolloid skin barrier, and APET release film, effectively isolates excrement from the hot melt adhesive, enhancing stability and service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a hot melt adhesive is used to connect the plastic part and the backing, then the manufacturing process is simple and fast, but the adhesive erodes when contacted with excrement, reducing service life
Solution Approach 1:
The chassis is divided into three main parts: the plastic part, the backing, and the welding ring. The welding ring acts as a separate protective component that isolates the adhesive from excrement, allowing each part to have optimized properties without compromising the whole system.
Solution Approach 2:
The welding ring serves as an intermediary component between the plastic part and the backing. It provides a protective barrier that prevents excrement from reaching the hot melt adhesive, while still allowing the adhesive to perform its bonding function effectively.
2Reliability
If the convex chassis fits closely with the skin to reduce leakage risk, then the reliability improves, but the structure becomes more complex
Solution Approach 1:
The chassis features a convex shape with a predetermined height that protrudes from the skin surface. This curved geometry allows the chassis to fit closely around the stoma, creating a reliable seal that prevents leakage while managing excrement flow away from sensitive areas.
Solution Approach 2:
The convex portion of the chassis has specific local properties - it protrudes at a predetermined height from the skin and is positioned to fit closely around the stoma. This localized structural feature provides enhanced leakage prevention exactly where needed without requiring the entire chassis to be complex.
3Duration of action of stationary object
If the welding ring is added to prevent adhesive erosion, then the service life improves, but the device complexity increases
Solution Approach 1:
The protective function is separated into a distinct welding ring component rather than being integrated into the plastic part or backing. This segmentation allows the welding ring to be optimized specifically for protection while keeping the other components simpler.
Solution Approach 2:
The welding ring serves multiple functions: it structurally connects the plastic part and backing, provides a barrier against excrement, and protects the adhesive from erosion. By consolidating these functions into a single component, the overall complexity increase is minimized while achieving multiple benefits.
Data Source
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AI summary
The invention discloses a convex stoma chassis which comprises a rubber disc, a plastic part fixed on the rubber disc, and a hot melt adhesive connected between the rubber disc and the plastic part, the rubber disc consisting of a convex surface, a concave backing corresponding to the convex surface, a hydrocolloid positioned in the concave backing, and a release film connected with the convex surface, a welding ring being disposed between the plastic part and the concave backing; in this invention, a welding ring is disposed between a plastic part and a backing, so that the leakage of the excrement and the corrosion of the hot melt adhesive can be completely avoided, and thus improving the use stability and the service life.