Recycling Multi-Compartment Unit Dose Articles
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Solution Overview
Problem
Multi-compartment unit dose articles with incompatible ingredients pose challenges in recycling due to cross-contamination when existing technologies combine contents from different compartments.
Innovation Solution
A process involving a perforating device that selectively opens one compartment of a multi-compartment unit dose article encapsulated in a water-soluble film without opening others, using a conveyor system with moving surfaces to orient and perforate the compartment, allowing for the separation and recycling of contents without cross-contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing recycling technologies are used to recycle multi-compartment unit dose articles, then the recycling process can be performed, but cross-contamination occurs between incompatible ingredients from different compartments
Solution Approach 1:
The invention segments the multi-compartment unit dose article by selectively opening individual compartments using a perforating device. The system identifies and opens only the first compartment while leaving other compartments intact, allowing separate processing of incompatible ingredients without cross-contamination. This segmentation enables targeted access to specific compartment contents while maintaining the integrity of other compartments.
Solution Approach 2:
The invention extracts the contents of the first compartment from the multi-compartment unit dose article through selective opening. By removing only the contents of the first compartment while leaving other compartments sealed, the system enables separate recycling processing of extracted contents without mixing incompatible ingredients from different compartments, thus preventing cross-contamination.
2Quantity of substance
If all compartments are opened simultaneously to enable recycling, then all contents can be processed, but incompatible ingredients from different compartments become cross-contaminated
Solution Approach 1:
The system processes compartments in a segmented manner rather than opening all simultaneously. By selectively opening only the first compartment initially, the invention maintains separation between incompatible ingredients from different compartments. This staged segmentation approach allows controlled processing while preserving ingredient compatibility throughout the recycling process.
Solution Approach 2:
The invention performs preliminary action by opening and processing the first compartment before accessing other compartments. This sequential approach ensures that incompatible ingredients are processed in separate stages, preventing cross-contamination. The system establishes a processing sequence that maintains ingredient stability by addressing one compartment at a time.
3Ease of operation
If a simple recycling process is used, then the process is easy to implement, but it cannot selectively open individual compartments without perforating others
Solution Approach 1:
The conveyor system performs multiple functions: it transports the multi-compartment unit dose article, orients it correctly, positions the first compartment for selective opening, and facilitates the perforating process. This multi-functional approach consolidates complex operations into a single integrated system, maintaining ease of operation while achieving precise selective compartment opening.
Solution Approach 2:
The system uses imaging means to create a visual representation or map of the multi-compartment unit dose article's compartment arrangement. By copying the spatial information about compartment locations, the system can accurately guide the perforating device to open only the first compartment without physically contacting or damaging other compartments, thus achieving precision without excessive complexity.
4Ease of operation
If the unit dose article is oriented at a steep angle for perforation, then the first compartment can be accessed, but other compartments may be inadvertently perforated
Solution Approach 1:
The invention transitions from horizontal to vertical conveyor orientation, creating a vertical gap through which the perforating device can pass. This dimensional change allows the perforating device to access the first compartment from above without requiring steep angular positioning of the entire unit dose article, thereby maintaining both ease of operation and perforation accuracy while avoiding damage to other compartments.
Data Source
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AI summary
The need for a means to recycle multi-compartment unit dose articles, while avoiding significant cross-contamination between the contents of the individual compartments, is met by recycling the contents of each compartment of the unit dose article separately.