Integrated Automated Processing System for Ultra-Clean Sorptive Wipers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a need for an improved process to prepare sorptive substrates with a consistently high degree of cleanliness and an integrated system for efficiently generating cleanroom wipers without human intervention, especially in environments like semiconductor fabrication and pharmaceutical manufacturing where micro-contamination control is critical.
Innovation Solution
The process involves unwinding a sorptive material, such as polyester, through a series of automated sections including pre-washing, ultrasonic and megasonic energy washing, rinsing, drying, and cutting, followed by automated packaging, ensuring minimal human contact and high cleanliness standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional manual processing methods are used for preparing sorptive substrates, then human intervention is required which increases contamination risk, but automation requires complex integrated processing systems
Solution Approach 1:
The patent combines multiple processing functions (unwinding, pre-washing, ultrasonic washing, megasonic washing, rinsing, drying, cutting, and packaging) into a single integrated processing system. This merging of functions eliminates the need for manual handling between different processing stages, thereby reducing contamination risk while managing system complexity through functional integration.
Solution Approach 2:
The sorptive substrate processing system is designed to operate autonomously without human intervention. The system performs all processing steps automatically, from unwinding the sorptive material to packaging the finished substrates. This self-service capability minimizes human contact and associated contamination risks while maintaining operational efficiency.
2Manufacturing precision
If multiple washing stages (pre-washing, ultrasonic, megasonic) are implemented, then cleanliness is improved, but processing time and energy consumption increase
Solution Approach 1:
The processing system implements continuous washing stages where pre-washing, ultrasonic washing, and megasonic washing occur in sequence without interruption. The sorptive substrate moves continuously through each washing stage, eliminating idle time between processes. This continuous action maintains high cleanliness levels while optimizing processing time by avoiding stop-start operations.
Solution Approach 2:
The ultrasonic and megasonic washing stages utilize periodic vibration and cavitation cycles to enhance cleaning effectiveness. These periodic actions create micro-bubbles and mechanical vibrations that dislodge contaminants efficiently, achieving high cleanliness levels without requiring excessively long processing times compared to continuous mechanical washing.
3Object-affected harmful factors
If automated packaging is implemented, then human intervention is reduced improving cleanliness, but device complexity increases
Solution Approach 1:
The packaging function is merged with the end of the processing line, where substrates are automatically transferred from the drying/cutting section directly into packaging materials. This integration eliminates the need for separate manual packaging operations, reducing contamination risk while managing complexity through functional consolidation at the process endpoint.
4Productivity
If sorptive substrates are made highly absorbent, then cleaning effectiveness is improved, but structural integrity and wet strength deteriorate
Solution Approach 1:
The patent optimizes the physical and chemical parameters of the sorptive substrate, including fiber composition, density, and cross-linking characteristics. By carefully controlling these parameters, the substrate achieves high absorbency for effective cleaning while maintaining sufficient structural integrity and wet strength to prevent disintegration during use. The parameters are tuned to balance absorption capacity with mechanical performance.
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 process achieves sorptive wipers with fewer than 150 contaminant fibers per square meter greater than 100 μm in length, maintaining high cleanliness and structural integrity, and operates efficiently with minimal human intervention, enhancing contamination control in cleanroom environments.
Implementation Method 1
ultrasonic energy washing
Implementation Method 2
ultrasonic energy washing
Implementation Method 3
megasonic energy washing
Implementation Method 4
megasonic energy washing
Implementation Method 5
drying
Data Source
AI summary
A sorptive wiper for cleaning is disclosed, the wipe comprising a cleaned and dried sorptive material having fewer than 150 contaminant fibers per square meter that are greater than 100 μm in length.