Electrostatic Razor Blade Coating for Narrow Polymer Edge Deposition
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Solution Overview
Problem
Existing razor blade coating methods result in excessive material waste, particularly with fluorinated polymers like PTFE, due to coatings covering a larger area and being thicker than necessary, leading to environmental concerns and inefficiencies.
Innovation Solution
A method involving an electrostatic spray coating process that atomizes polymer droplets before they contact the razor blade edge, allowing precise control over the coating thickness and minimizing waste by forming a narrow, homogeneous polymer coating on the edge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If spray coating methods are used to apply polymer coatings to razor blades, then the coating process can be performed in an industrially applicable way with high throughput, but the resulting coatings cover a much larger area and have much higher thickness than necessary, leading to excessive material waste
Solution Approach 1:
The patent applies electrostatic spray coating technology to achieve localized deposition of polymer particles only on the razor blade edge where coating is needed. The electrostatic field confines the coating material to the target area, preventing overspray and ensuring that polymer particles are deposited precisely where required rather than covering the entire blade surface.
Solution Approach 2:
The patent changes the physical state and deposition parameters by using electrostatically charged polymer particles instead of conventional spray mist. The electrostatic field parameters control the trajectory and distribution of particles, enabling precise deposition on the blade edge while minimizing material waste and avoiding excessive coating thickness.
2Reliability
If thicker coatings are applied to ensure adequate coverage, then the lubricating effect is improved, but the material waste increases significantly
Solution Approach 1:
The electrostatic spray coating method delivers polymer particles precisely to the blade edge with controlled thickness. The localized electrostatic field ensures that sufficient coating material is deposited only where needed for lubrication, avoiding both insufficient coverage and excessive thickness that would waste material.
Solution Approach 2:
The patent replaces conventional mechanical spray coating with electrostatic field-based particle deposition. This substitution enables precise control over coating thickness and distribution, ensuring adequate lubricating effect while minimizing material waste through targeted delivery of polymer particles.
3Loss of time
If conventional spray coating is used, then the coating can be applied quickly, but the coating area extends beyond the necessary edge portion, depositing waste material on the product itself
Solution Approach 1:
The electrostatic spray coating system confines polymer particle deposition to the specific blade edge region through electrostatic field control. This localized deposition prevents coating material from landing on unnecessary areas of the blade or surrounding surfaces, eliminating waste while maintaining fast application speed.
Solution Approach 2:
The electrostatic field provides real-time control over particle trajectory and deposition location. The field configuration ensures that charged polymer particles follow precise paths to the blade edge, with the electrostatic forces automatically correcting for deviations and preventing overspray, thus minimizing waste material deposition.
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 method achieves a very narrow, defined, and homogeneous polymer coating on the razor blade edge, reducing material waste and improving shaving performance while maintaining efficiency.
Implementation Method 1
creating an electric field between the capillary nozzle and the razor blade; atomizing the polymer dispersion into droplets and moving the droplets within the electric field towards the razor blade edge
Implementation Method 2
dispensing the polymer dispersion through the capillary nozzle while moving the nozzle relative to the razor blade along the razor blade edge; atomizing the polymer dispersion into droplets and moving the droplets within the electric field towards the razor blade edge
Implementation Method 3
heating the razor blade at a temperature above the melting point of the polymer particles to form a polymer coating
Implementation Method 4
heating the razor blade at a temperature above the melting point of the polymer particles to form a polymer coating
Implementation Method 5
drying at least some of the droplets to particles comprising the polymer prior to contacting the surface of the razor blade edge
Data Source
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AI summary
The present disclosure relates to a novel method for coating a razor blade with a polymer, the method comprising the steps of: a. providing a polymer in a liquid so as to obtain a polymer dispersion; b. moving the polymer dispersion through an electrically conductive capillary nozzle; c. creating an electric field between the capillary nozzle and the razor blade; d. dispensing the polymer dispersion through the capillary nozzle while moving the nozzle relative to the razor blade along the razor blade edge; e. atomizing the polymer dispersion into droplets and moving the droplets within the electric field towards the razor blade edge; f. drying at least some of the droplets toparticles comprising the polymer prior to contacting the surface of the razor blade edge; and g. heating the razor blade at a temperature above the melting point of the polymerparticles to form a polymer coating.