CO2-Assisted Epilaming for Watchmaking
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Solution Overview
Problem
Current epilaming processes in watchmaking and jewelry industries rely on polluting and expensive fluorinated solvents, which are environmentally harmful and require complex management, while offering limited solubility for effective epilame agents and low concentration usage, leading to inefficiencies and environmental concerns.
Innovation Solution
A CO2-assisted epilaming process that uses a solution of epilame agent in a solvent/CO2 mixture under controlled pressure and temperature conditions to deposit a hydrophobic and oleophobic molecular layer, significantly reducing the need for fluorinated solvents and simplifying bath management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional fluorinated solvents are used for epilaming, then effective epilame coating is achieved, but environmental pollution and high cost increase
Solution Approach 1:
The patent changes the physical state and composition parameters of the solvent system by replacing traditional fluorinated solvents with a water-propanol mixture, fundamentally altering the chemical composition to eliminate environmental pollution while maintaining epilame coating effectiveness
Solution Approach 2:
The patent replaces expensive fluorinated solvents with a cheaper water-propanol mixture, reducing both cost and environmental impact. The solvent system is designed to be replaceable and regenerable, treating it as a consumable that can be economically managed
2Object-affected harmful factors
If water/propanol mixture is used as solvent, then environmental friendliness improves, but epilame agent solubility decreases
Solution Approach 1:
The patent uses a composite solvent system combining water and propanol in specific proportions (90-99% water, 1-10% propanol). This composite formulation leverages the polarity of water and the mild organic solvent properties of propanol to achieve sufficient solubility for epilame agents while maintaining environmental friendliness
Solution Approach 2:
The patent applies different solvent compositions for different stages or requirements of the epilaming process, optimizing solubility locally where needed while maintaining overall environmental benefits. The propanol component is specifically used to enhance solubility in the water-based system
3Quantity of substance
If low concentration of epilame is used, then cost is reduced, but bath management complexity increases due to volatility
Solution Approach 1:
The patent changes the volatility parameter of the solvent system by using water-propanol instead of volatile fluorinated solvents. The higher boiling point and lower volatility of the water-propanol mixture reduce evaporative losses, simplifying bath management while maintaining effective epilame concentrations
Solution Approach 2:
The patent enables continuous operation of the epilaming process by reducing the frequency of bath maintenance and replenishment. The stable solvent system maintains consistent epilame concentration over longer periods, allowing continuous production without interruption for bath monitoring or replenishment
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 process achieves high-quality epilaming with reduced environmental impact and cost, maintaining the effectiveness and durability of the lubricant layer, comparable to traditional methods, while eliminating the use of polluting solvents and simplifying industrial management.
Implementation Method 1
introduction of CO2 into the hermetically sealed chamber at a pressure between 25 bar and 74 bar and at a temperature between 10°C and 80°C
Implementation Method 2
deposit an invisible hydrophobic and oleophobic molecular layer of said epilame agent
Data Source
AI summary
The invention relates to a method for depilating at least part of a substrate surface comprising the steps of: a) preparation of an epilame agent b) optionally, preparation of the substrate surface c) placement of the substrate and the epilame agent in an ambient pressure chamber d) introduction into the hermetically sealed chamber of CO2 at a pressure between 25 bar and 74 bar and at a temperature between 10°C and 80°C, for a duration between 1 min and 30 min, e) reduction of the pressure in the chamber, and f) removal of the depilated substrate from the chamber.