Hydrocarbon Polymer Razor Blade Coating for Low Cutting Force
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Solution Overview
Problem
Existing razor blade coatings do not effectively enhance cutting performance, reduce skin nicking, and are not cost-effective or time-efficient to manufacture, while maintaining durability and lubricity.
Innovation Solution
A razor blade with a sharpened cutting edge coated with a hydrocarbon polymer layer, which is cured to exhibit at least 10% crystallinity, providing a durable and low-cut force coating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a hard coating is applied to strengthen the blade edge, then the blade strength is improved, but the cutting force increases and shaving comfort deteriorates
Solution Approach 1:
The patent applies a multi-layer composite coating structure where a hard coating layer (providing blade edge strength) is combined with a lubricious outer coating layer (reducing cutting force). This composite structure allows both layers to perform their respective functions simultaneously, resolving the contradiction between blade strength and cutting comfort.
Solution Approach 2:
The patent creates different surface properties at different locations/layers of the coating. The inner hard coating provides localized strength at the blade edge, while the outer lubricious coating provides localized low-friction properties at the skin-contact surface, allowing each layer to optimize its specific function.
2Force
If an outer coating is applied to reduce cutting force, then shaving comfort is improved, but the coating durability and resistance to wear deteriorates
Solution Approach 1:
The patent uses a composite coating system where the hard inner layer provides mechanical durability and wear resistance, while the lubricious outer layer reduces cutting force. The combination ensures that the outer coating is protected by the harder underlying layer, improving overall durability while maintaining low cutting force.
Solution Approach 2:
The hard inner coating layer acts as a protective cushion or buffer beneath the lubricious outer layer, preventing direct mechanical damage to the softer outer coating during shaving, thereby enhancing the outer coating's durability while maintaining its lubricity.
3Ease of manufacture
If conventional coating processes are used, then manufacturing is simple, but the coating does not provide sufficient durability and lubricity simultaneously
Solution Approach 1:
The patent applies the hard coating layer first as a preliminary step, creating a durable substrate, and then applies the lubricious outer coating layer subsequently. This sequential application ensures proper adhesion and functional performance of both layers while maintaining a relatively simple manufacturing process.
Solution Approach 2:
The patent employs a composite coating approach that combines materials with complementary properties (hardness and lubricity) in a multi-layer structure, achieving superior overall performance while using conventional coating application methods for each layer.
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 hydrocarbon polymer coating reduces cutting force, enhances shaving comfort and safety, and maintains durability, while being cost-effective and efficient to produce.
Implementation Method 1
an outermost layer created by deposition of a lubricious, hydrocarbon polymer coating material
Implementation Method 2
The hydrocarbon polymer may be cured to exhibit at least 10% crystallinity
Data Source
AI summary
A razor blade with a sharpened cutting edge with an outer bonding surface. A hydrocarbon polymer organic coating material deposited on the outer bonding surface forming an outermost layer of the sharpened cutting edge. The hydrocarbon polymer organic coating is composed of one or more layers. Additionally, the method of coating the cutting edge is described.