Electrostatic Flocking Adhesive Segmentation for Precision Fiber Control
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Solution Overview
Problem
Existing methods for electrostatic flocking of human keratin materials, such as the skin, are imprecise and prone to fiber dispersion beyond the intended area, leading to unsatisfactory results and difficulty in controlling fiber density and distribution, especially in sensitive areas like the eye contour.
Innovation Solution
Creating a network of adhesive and non-adhesive areas on the skin, allowing for controlled electrostatic projection of fibers onto the skin using a pressure-sensitive adhesive composition, which improves comfort, ease of makeup removal, and maintains natural hair appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a continuous film of adhesive is used for electrostatic flocking, then fiber adhesion to the skin is improved, but fiber distribution control deteriorates and fiber dispersion beyond the intended area occurs
Solution Approach 1:
The continuous adhesive film is segmented into discrete adhesive areas separated by non-adhesive areas. This segmentation allows fibers to be deposited only in specific regions, improving distribution control while maintaining adhesion where needed. The adhesive areas are arranged in patterns that correspond to natural hair growth zones, preventing fiber dispersion beyond intended areas.
Solution Approach 2:
Different regions of the treatment area are assigned different properties: adhesive areas provide fiber attachment, while non-adhesive areas prevent fiber deposition. This local differentiation enables precise control over fiber distribution, allowing dense fiber placement in some regions and sparse or no placement in others, matching natural hair patterns.
2Area of stationary object
If electrostatic flocking is applied to sensitive areas like the eye contour, then cosmetic treatment coverage is improved, but fiber dispersion to undesired areas increases
Solution Approach 1:
The treatment area is segmented into adhesive and non-adhesive zones, with non-adhesive areas acting as containment barriers. This segmentation prevents electrostatic field lines from carrying fibers beyond the intended treatment boundary, especially important for sensitive areas like the eye contour where fiber dispersion must be prevented.
Solution Approach 2:
Non-adhesive areas serve as intermediary zones that block fiber migration. These zones act as physical and electrostatic barriers between the treatment area and sensitive surrounding areas, preventing fibers from dispersing to undesired locations while allowing the treatment to cover the intended area.
3Reliability
If adhesive composition is applied in a continuous film, then fiber retention is improved, but comfort and ease of removal deteriorate
Solution Approach 1:
The continuous adhesive film is divided into discrete adhesive areas separated by non-adhesive areas. This segmentation reduces the total amount of adhesive in contact with the skin, improving comfort during wear and making removal easier while still providing sufficient fiber retention in the adhesive zones where fibers are actually deposited.
Solution Approach 2:
Adhesive properties are localized to specific areas where fiber deposition occurs. In non-adhesive areas, the skin remains free of adhesive, providing comfort and facilitating easy removal. This local application of adhesive only where needed maintains fiber retention effectiveness while improving overall ease of operation.
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
This method allows for precise control over fiber implantation and density, enhancing the aesthetic outcome and comfort by preventing fiber dispersion and maintaining the natural appearance of hair, while being easier to use and remove.
Implementation Method 1
The adhesive areas are formed by deposition of an adhesive composition on the keratin materials prior to the projection of the fibres
Implementation Method 2
electrostatically projecting fibres onto said region
Implementation Method 3
The fibres are then projected by the electrostatic field onto the surface to be treated
Data Source
AI summary
A cosmetic treatment method. The method includes creating, on a region of the keratin materials to be treated, a set of adhesive areas and of non-adhesive areas extending between the adhesive areas. The method includes electrostatically projecting fibres onto the region.