Retention Device Projections Inhibit Compression Band Slippage
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Solution Overview
Problem
Existing compression bands, particularly those with short elongation, tend to slip along the leg due to mechanical stresses and movement, posing challenges in maintaining their effectiveness and comfort, especially in treatments like leg ulcers, where traditional solutions like increased friction or adhesives are either ineffective or unacceptable due to skin sensitivity and complexity in production.
Innovation Solution
A retaining device featuring a flexible, inextensible film with projections on one face and an adhesive layer on the other, designed to inhibit shear stress transmission and promote adhesion, preventing turn-on-turn and overall slippage without using adhesives or latex, allowing for easier use and wider adhesive choices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the coefficient of friction between the compression garment and skin is increased to prevent slippage, then the garment's anti-slip performance is improved, but the garment becomes less well-tolerated by patients with fragile or damaged skin and the manufacturing complexity increases
Solution Approach 1:
The patent introduces a retention device as an intermediary component between the compression garment and the skin. This device features a flexible inextensible film with projections on one face and adhesive on the other face, allowing the garment to adhere to the retention device rather than directly to the skin. This mediator approach maintains anti-slip performance while protecting sensitive skin from direct contact with rough or adhesive materials.
Solution Approach 2:
The retention device segments the compression system into distinct functional components: the compression garment, the retention device with its dual-sided structure (projections on one face, adhesive on the other), and the skin. This segmentation allows each component to perform its specific function optimally without compromising the others.
2Reliability
If adhesive is applied to the compression garment to prevent slippage, then the garment's adhesion to skin is improved, but the design and manufacture are complicated and the garment is less suitable for washing and reuse
Solution Approach 1:
The retention device serves as a mediator that carries the adhesive function separately from the compression garment. The adhesive is applied to the retention device's second face rather than the garment itself, simplifying garment manufacturing while maintaining adhesion capability. The retention device acts as a removable adhesive carrier.
Solution Approach 2:
The retention device is designed to be washable and reusable, allowing the adhesive to be recovered and reused multiple times. This approach separates the disposable/washable retention device from the compression garment, enabling the retention component to be cleaned and reused while the garment maintains its compression properties.
3Reliability
If adhesive is applied to the compression garment to prevent slippage, then the garment's adhesion is improved, but the adhesive must withstand mechanical stresses during movement and not alter the fabric's mechanical properties
Solution Approach 1:
The retention device with its flexible inextensible film acts as a buffer between the adhesive and the compression garment. The film's specific mechanical properties (flexible yet inextensible) allow it to withstand shear stresses during movement without transmitting these stresses to the adhesive-garment bond, thereby preserving the fabric's mechanical properties while maintaining adhesion strength.
4Reliability
If a second compression band is used to secure and hold the first band in place, then the anti-slip performance is improved, but the product becomes thicker, warmer, and takes longer to apply
Solution Approach 1:
The retention device uses a flexible inextensible film that is thin and lightweight, unlike a second compression band which would add significant thickness and warmth. This thin film structure provides the necessary anti-slip function through its projections and adhesive without the bulk and thermal insulation of an additional compression layer.
Solution Approach 2:
The retention device extracts the securing function from the compression band system itself and implements it through a separate, specialized component. Rather than adding another compression band, the invention extracts the anti-slip function and implements it through a thin film with projections and adhesive, reducing overall system thickness and application time.
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 solution effectively inhibits slippage of compression bands during movement, enhancing their longevity and comfort by reducing shear stress transmission, while being easier to manufacture and reuse, and compatible with various adhesive substances.
Implementation Method 1
a flexible and inextensible film (5) having a first face (5a) intended to be placed in contact with the support article, and a second face (5b) opposite the first face (5a) and intended to be placed opposite the limb of the individual, and an adhesive layer (15) covering at least in part the second face (5b) of the film (5) and adapted to retain the film (5) on the limb of the individual
Implementation Method 2
the first face comprising a base surface (6) and a plurality of projections (7), each extending from the base surface (6) to a free edge (8), each projection (7) having a height (h) between the base surface (6) and the free edge (8) of between 80 μm and 1200 μm
Data Source
Figure 1~2
Figure 3~4
Figure 5~7
AI summary
Holding device (1) intended to prevent a retention garment from slipping on a limb of an individual, the holding device (1) comprising: -a flexible and inextensible film (5) having opposite first and second faces, the first face having a base surface (6) and a plurality of protrusions (7) each extending from the base surface (6) as far as a free edge (8), each protrusion (7) having a height of between 80 µm and 1200 µm, preferably between 150 µm and 900 µm, the protrusions (7) being arranged on the base surface (6) such that a sum of the lengths of the free edges (8) per unit area of the base surface (6) is between 5 cm/cm² and 120 cm/cm², preferably between 10 cm/cm² and 80 cm/cm², -an adhesive layer covering at least part of the second face of the film.