Rigid Collapsible Liner Preventing Choke-Off in Ultrapure Liquid Dispensing
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Solution Overview
Problem
Current liner-based storage and dispensing systems for ultrapure liquids face issues such as air-liquid interface problems leading to particle and bubble generation, pinhole punctures, weld tears, and overflow due to elastic deformation during transportation, which contaminate the liquids and result in liquid loss.
Innovation Solution
The development of substantially rigid collapsible liners with a thick, self-supporting wall that can be pressureless collapsed for dispensing, and flexible gusseted or non-gusseted liners with robust welds and reduced folds to minimize contamination and overflow, along with methods to prevent choke-off by using textured surfaces, channel inserts, and specific dispensing mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If collapsible liners are used to reduce air-liquid interfaces, then particle and bubble generation is reduced, but the liners become vulnerable to pinhole punctures and weld tears from vibration
Solution Approach 1:
The patent employs flexible liners made from robust materials that can collapse during dispensing to minimize air-liquid interfaces while maintaining sufficient structural integrity to resist vibration-induced damage during transportation
Solution Approach 2:
The patent uses composite material structures for the liners, combining materials with different properties to achieve both flexibility for collapse and strength for vibration resistance, thereby preventing pinhole punctures and weld tears
2Strength
If rigid-wall containers are used for storage, then structural strength is provided, but air-liquid interfaces are created during pressure dispensing leading to gas dissolution
Solution Approach 1:
The patent transitions from static rigid-wall containers to dynamic collapsible liners that change shape during dispensing, collapsing as liquid is removed to maintain full contact with the liquid and eliminate air-liquid interfaces that cause gas dissolution
3Quantity of substance
If liners are filled to specified amount, then storage capacity is maximized, but folds prevent clean fitting within outer containers causing liquid overflow
Solution Approach 1:
The patent incorporates pre-formed folds or compression features into the liner design before filling, allowing the liner to be compressed flat for insertion into the outer container and then expand to hold the full specified amount of liquid without overflowing
4Productivity
If liners are made collapsible for dispensing, then dispensing efficiency is improved, but structural rigidity is reduced making them vulnerable to deformation
Solution Approach 1:
The patent modifies physical parameters of the liner materials and结构设计 to achieve optimal balance between collapse ability for efficient dispensing and sufficient rigidity to resist deformation during handling and transportation
Data Source
AI summary
The present disclosure relates to a blow-molded, rigid collapsible liner that can be suitable particularly for smaller storage and dispensing systems. The rigid collapsible liner may be a stand-alone liner, e.g., used without an outer container, and may be dispensed from a fixed pressure dispensing can. Folds in the rigid collapsible liner may be substantially eliminated, thereby substantially reducing or eliminating the problems associated with pinholes, weld tears, and overflow. The present disclosure also relates to flexible gusseted or non-gusseted liners, which is scalable in size and may be used for storage of up to 200 L or more. The flexible gusseted liner may be foldable, such that the liner can be introduced into a dispensing can. The liner can be made of thicker materials, substantially reducing or eliminating the problems associated pinholes, and may include more robust welds, substantially reducing or eliminating the problems associated weld tears.