Polysulfide Sintered Filter Element for High Temperature Filtration
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Solution Overview
Problem
Existing filter elements made from sintered plastics are not temperature-resistant and hydrolysis-resistant, and they lose mechanical stability at elevated temperatures, making them unsuitable for continuous use above 80°C, and they are not effectively cleanable by pressurized air pulses.
Innovation Solution
A filter element with a porous sintered structure formed from polysulfide particles, particularly polyphenylene sulfide, which is sintered without pressure to maintain porosity and mechanical stability, allowing for elevated temperature resistance and hydrolysis resistance, and can be cleaned using pressurized air pulses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If polyethylene particles are sintered together to form a filter body, then the filter element is inherently stable and porous, but the temperature resistance is limited to below 80°C due to plastic deformations
Solution Approach 1:
The patent changes the material parameter from polyethylene to polysulfone, which has fundamentally different thermal properties. Polysulfone particles maintain their structural integrity at elevated temperatures (continuous use up to 100°C, short-term up to 150°C) while still being capable of sintering to form a porous filter body structure.
2Temperature
If temperature-resistant high-performance plastics are used to achieve higher continuous use temperatures, then temperature resistance is improved, but the materials sinter very poorly or not at all, reducing porosity
Solution Approach 1:
The patent identifies polysulfone as a specific high-performance plastic that changes the sintering parameters successfully. Polysulfone particles can be sintered at temperatures between 200-300°C to form a porous structure, unlike other temperature-resistant plastics that require pressure sintering and lose porosity.
Solution Approach 2:
The patent replaces pressure-based sintering mechanisms with thermal-based sintering. By using polysulfone particles that soften and bond through heat alone (without requiring external pressure), the process maintains porosity while achieving coherent structure formation.
3Volume of stationary object
If polysulfone particles are sintered without pressure to maintain porosity, then porosity is preserved, but mechanical stability is reduced
Solution Approach 1:
The patent optimizes sintering parameters (temperature and time) for polysulfone particles to achieve the right balance. By controlling the sintering process within specific parameter ranges, sufficient mechanical strength is developed while maintaining the porous structure necessary for filtration.
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 polysulfide-based filter element achieves enhanced temperature resistance, hydrolysis resistance, and mechanical stability, enabling continuous use up to 240°C and effective cleaning, with porosity allowing fluid flow and low pressure loss, making it suitable for various industrial applications.
Implementation Method 1
a filter body which forms a porous sintered structure and is constructed with filter body particles which are at least in part polysulfide particles
Data Source
AI summary
The invention relates to a filter element having inherent stability and being porous to permit flow therethrough, comprising a filter body which forms a porous sintered structure and is constructed with filter body particles which are at least in part polysulfide particles. In addition, the invention relates to a method of manufacturing such a filter element.