Edged Cataplasm Structure for Waterproof Joint Adhesion
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Solution Overview
Problem
Traditional cataplasms are prone to falling off due to body movement and are not waterproof, limiting their application and adherence.
Innovation Solution
An edged cataplasm design featuring a support layer, drug layer, cross-type release film, waterproof-breathable adhesive layer, and antibiotic layer, with rounded corners and edges, and a manufacturing process that includes coating, half-cutting, and overlapping film pieces to enhance stability and adhesion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the traditional rectangular cataplasm with three-layer structure is used, then the manufacturing process is simple, but the cataplasm falls off easily after being stuck due to twisting of body joints and clothes rubbing
Solution Approach 1:
The patent applies curvature by rounding the corners of the cataplasm and designing the release film with a cross-shaped tear line that creates rounded edge structures. This curvature design prevents the cataplasm from falling off easily by reducing stress concentration at sharp corners and improving conformity to body contours, directly addressing the adherence stability problem.
Solution Approach 2:
The release film is segmented into a cross-shaped structure with tear lines that allow it to be divided into four quadrants. This segmentation enables the release film to be easily torn and removed while maintaining the integrity of the underlying adhesive layer, improving reliability without significantly increasing overall structural complexity.
2Reliability
If the traditional rectangular cataplasm is used, then the structure is simple, but the cataplasm is not waterproof and falls off easily after bathing
Solution Approach 1:
The patent employs composite materials by combining the adhesive layer with a waterproof breathable film layer. This composite structure provides both adhesion and waterproofing functions, allowing the cataplasm to remain attached during bathing while maintaining skin breathability, thus improving reliability without excessive complexity.
Solution Approach 2:
The waterproof breathable film acts as a flexible thin film barrier that prevents water penetration while allowing vapor transmission. This flexible film maintains the adhesive properties during water exposure, solving the waterproofness issue without creating a rigid or overly complex structure.
3Adaptability or versatility
If the traditional rectangular cataplasm is used, then the design is simple, but the cataplasm has great limitations in the sticking position and the application
Solution Approach 1:
The patent achieves universality by designing a cataplasm structure that can be applied to various body parts including joints and curved surfaces. The rounded corners, flexible layers, and cross-shaped release film configuration enable the product to adhere effectively to different anatomical locations, significantly improving adaptability while maintaining reasonable design simplicity.
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 edged cataplasm design improves adherence and waterproofness, allowing application on various body joints and enhancing product usability.
Implementation Method 1
the main body of the waterproof-breathable adhesive layer is a polyurethane (PU) film having a waterproof-breathable property and an adhesive property
Implementation Method 2
a drug layer, which adheres to the bottom of the support layer, and the drug layer is a drug-containing hydrogel
Data Source
AI summary
An edged cataplasm and a manufacturing process are disclosed. The edged cataplasm includes a support layer; a drug layer, which adheres to the bottom of the support layer; a cross-type release film, which adheres to the bottom of the drug layer. The cross-type release film includes a first-release film piece and a second-release film piece, and the adjacent edges of the first-release film piece and the second-release film piece are partially overlapped. In addition, the edged cataplasm further includes a waterproof-breathable adhesive layer, which adheres to the top of the support layer and coated with silver ions or a nano antibiotic layer; a polyethylene terephthalate (PET) film, which adheres to the top of the waterproof-breathable adhesive layer. The PET film includes a first part and a second part, and the adjacent edges of the first part and the second part are arranged as an aligned S-shaped edge.