Aerosol Precursor Particle Blend for Flavor and Pressure Consistency
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Solution Overview
Problem
Aerosol generating apparatuses suffer from inconsistent particle size of solid components, leading to variations in flavor and pressure drop, resulting in an inconsistent user experience.
Innovation Solution
A solid aerosol precursor comprising a bimodal particle size distribution of fine and coarse plant material particles, with D50 sizes ranging from 40 to 70 µm and 225 to 300 µm, respectively, to enhance flavor delivery and structural consistency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single particle size distribution is used for plant material particles, then the manufacturing process is simpler, but the flavor delivery and structural consistency are inconsistent
Solution Approach 1:
The plant material particles are segmented into two distinct size ranges: fine particles (D50: 40-70 μm) for flavor delivery and coarse particles (D50: 225-300 μm) for structural integrity. This segmentation allows each size fraction to perform its specific function optimally, resolving the contradiction between manufacturing simplicity and product consistency.
Solution Approach 2:
Different regions of the particle size distribution are assigned different qualities and functions. The fine particles provide the flavor-carrying surface area while the coarse particles provide the structural framework. This local quality assignment ensures consistent flavor delivery and structural properties throughout the aerosol precursor.
2Reliability
If fine plant material particles are used, then flavor delivery is improved, but structural strength and porosity consistency deteriorate
Solution Approach 1:
The particle population is segmented into fine particles (D50: 40-70 μm) that provide flavor delivery surface area and coarse particles (D50: 225-300 μm) that provide structural strength. This functional segmentation resolves the contradiction between flavor delivery and structural integrity.
Solution Approach 2:
The aerosol precursor uses a composite particle size distribution combining fine and coarse particles, where each size fraction contributes different properties. The fine particles contribute flavor surface area while coarse particles contribute structural framework, creating a composite system that achieves both flavor delivery and structural strength.
3Strength
If coarse plant material particles are used, then structural strength is improved, but flavor delivery consistency deteriorates
Solution Approach 1:
The particle population is segmented into coarse particles (D50: 225-300 μm) for structural support and fine particles (D50: 40-70 μm) for flavor delivery. This segmentation allows the coarse particles to provide structural integrity while the fine particles ensure consistent flavor release.
Solution Approach 2:
Different particle size regions are assigned different functional qualities: coarse particles provide the structural framework with high strength-to-weight ratio, while fine particles provide the high-surface-area regions necessary for consistent flavor delivery and aerosolization.
4Ease of manufacture
If particle size varies widely, then manufacturing is easier, but pressure drop and user experience consistency worsen
Solution Approach 1:
Rather than accepting wide particle size variation, the invention segments the particle distribution into two controlled modes with specific D50 ranges. This segmentation transforms the manufacturing challenge into a controlled dual-mode distribution that ensures consistent pressure drop and user experience.
Solution Approach 2:
The invention changes the particle size distribution parameters from a single broad distribution to a bimodal distribution with specific D50 values (40-70 μm for fine, 225-300 μm for coarse). This parameter change optimizes both manufacturing control and user experience consistency by assigning specific functional roles to each size mode.
Data Source
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AI summary
A solid aerosol precursor (6), where the solid aerosol precursor (6) comprises fine plant material particles and coarse plant material particles, the fine plant material particles having a first monomodal particle size distribution by number having a D50 particle size of from 40 to 70 µm, and the coarse plant material particles having a second monomodal particle size distribution by number having a D50 particle size of from 225 to 300 µm, where combining together the first monomodal particle size distribution and the second monomodal particle size distribution results in a bimodal particle size distribution. The consistency of the particle size, and flavour and structure of the solid aerosol precursor may be improved.