Stickpack Opening via Thermal Peel and Centrifugal Rotation
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Solution Overview
Problem
Current rotation-based analysis methods for genetic material, such as PCR thermocycling, are inefficient in opening process liquids in cartridges due to reliance on temperature control and manual handling, which prolongs process time and requires complex equipment.
Innovation Solution
A method involving a cartridge with a microfluidic channel-and-chamber structure, where a stickpack containing process liquid is heated to 80-130°C and rotated at 20-80 Hz to rapidly open and transfer the liquid, utilizing a peel film with a thermally sealed seam and localized heating to minimize energy and sample exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual handling and temperature control are used to open process liquids in cartridges, then sample integrity is maintained, but process time is prolonged and equipment complexity increases
Solution Approach 1:
The peel film is pre-sealed along a separation seam during manufacturing, creating a pre-conditioned structure that enables rapid opening. The thermal sealing is performed in advance, so that during operation only a simple separation action is needed rather than complex manual handling procedures
Solution Approach 2:
The invention replaces complex mechanical opening mechanisms with a simple peel action. The thermally sealed seam is designed to separate along a predetermined path through mechanical peeling force, eliminating the need for complex temperature control systems and manual handling procedures during the opening process
2Temperature
If complex equipment and manual handling are used for opening stickpacks, then precise temperature control is achieved, but device complexity increases
Solution Approach 1:
The invention replaces complex thermal control equipment with a simple mechanical peeling system. The peel film's thermally sealed seam is designed to separate through mechanical action alone, eliminating the need for heaters, temperature sensors, and complex control systems that would be required for thermal opening methods
Solution Approach 2:
The peel film is designed as a disposable component with a built-in separation seam. After use, the entire stickpack can be discarded, eliminating the need for complex cleaning and sterilization equipment that would be required for reusable opening mechanisms
3Loss of time
If rapid opening of stickpacks is achieved through heating and rotation, then process time is reduced, but energy consumption increases
Solution Approach 1:
The peel film is pre-sealed during manufacturing with a separation seam that requires minimal energy to open. The thermal sealing is performed in advance under controlled conditions, so that during actual operation only low-energy mechanical peeling is needed rather than high-energy heating or rotation
Solution Approach 2:
The invention extracts the opening function from the main system by using a separate peel film with a dedicated separation seam. This allows the opening process to be performed independently with minimal energy input, separating the opening function from energy-intensive heating or rotation systems
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 method significantly reduces process time by rapidly opening the stickpack, allowing efficient liquid transfer and analysis, while minimizing energy consumption and maintaining sample integrity through controlled temperature and centrifugal force.
Implementation Method 1
the stickpack chamber or the respective stickpack chamber (especially each containing a stickpack) is heated to a temperature of from 80 to 130 degrees Celsius
Implementation Method 2
in addition, in the opening step, the cartridge is rotated at a speed of from 20 to 80 Hz
Implementation Method 3
a peel film (in particular a self-adhesive foil) having a thermally sealed separation seam
Data Source
AI summary
A method for operating an analysis device for carrying out an analysis process, more particularly by using a polymerase chain reaction, includes providing a cartridge having a microfluidic channel-and-chamber structure. At least one film bag containing a process liquid is disposed in a stick-pack chamber of the cartridge. In an opening step the stick-pack chamber or stick-pack chambers are heated to a temperature of 80 to 130 degrees Celsius, and in the opening step the cartridge rotates at a rotational speed of 20 to 80 Hz. A cartridge and an analyzer are also provided.