Capsule Filter Tow Structure for Low-Filtration Flavor Inhalation
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Solution Overview
Problem
Non-combustion flavor inhalation articles with low-filtration filters face challenges in maintaining the position of a breakable capsule due to movement during use, while increasing the packing amount of tow to stabilize the capsule leads to higher filtration rates.
Innovation Solution
A filter medium comprising tow with C-shaped cross-section filaments, packed at a density of 0.117 mg/mm³ or greater, and a capsule positioned no more than 15 mm from the filter's mouthpiece end, along with specific airflow resistance and filament denier ranges, stabilizes the capsule position while maintaining low filtration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the packing amount of tow is increased to stabilize the capsule position, then the capsule position stability is improved, but the filtration rate increases
Solution Approach 1:
The invention changes the physical parameters of the tow by specifying filament cross-sectional shapes (C-shaped, O-shaped, or hollow circular) and controlling the packing density within a specific range (0.117-0.167 mg/mm³). This parameter optimization allows the filter to maintain low filtration (≤4.0 mg/min) while providing sufficient support to prevent capsule movement during use.
Solution Approach 2:
The invention applies local quality by creating a specific zone around the capsule where the tow packing density is controlled to be within 0.117-0.167 mg/mm³. This localized optimization ensures the capsule remains stable in position while the overall filter maintains low filtration characteristics, rather than uniformly increasing packing throughout the entire filter.
2Object-generated harmful factors
If the packing amount of tow is decreased to maintain low filtration, then the filtration rate is reduced, but the capsule position becomes unstable
Solution Approach 1:
The invention identifies and applies specific parameter thresholds: packing density of 0.117 mg/mm³ or greater (preferably 0.117-0.167 mg/mm³) and capsule positioning within 15 mm of the filter end. These parameter specifications ensure that even with low overall tow packing to maintain ≤4.0 mg/min filtration, the capsule remains stable due to the optimized local density and positioning.
Solution Approach 2:
The invention implements preliminary action by pre-positioning the capsule within 15 mm of the filter end before use. This advance positioning, combined with the optimized tow packing density, ensures the capsule is already in a stable location that prevents movement during subsequent use, eliminating the need for higher overall packing density.
3Stability of the object's composition
If the capsule is positioned deeper in the filter to stabilize it, then the capsule position stability is improved, but the flavor delivery efficiency decreases
Solution Approach 1:
Instead of placing the capsule deep in the filter as might be intuitively expected for stability, the invention inverts the approach by positioning the capsule near the end of the filter (within 15 mm of the filter end). This inverted positioning, combined with optimized local tow density, achieves both stability and efficient flavor delivery to the user.
Solution Approach 2:
The invention changes the positional parameter from deep placement to end-near placement (within 15 mm of filter end), and combines this with specific packing density parameters (0.117-0.167 mg/mm³) to achieve optimal balance between stability and flavor delivery efficiency.
Data Source
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AI summary
The problem addressed lies in providing a non-combustion flavor inhalation article comprising a filter which can stably maintain the position of a capsule while retaining low filtration. A non-combustion flavor inhalation article comprising an aerosol source portion, a cooling portion, and a filter portion, wherein the filter portion comprises a first filter segment, and the first filter segment comprises a filter medium and a capsule, the filter medium comprises tow that contains filaments having a C-shaped cross section, and at least one of the capsules is arranged at a position no greater than 15 mm from an exposed end of the filter portion closest to the capsule side, out of exposed ends of the filter portion on a mouthpiece side.