Composite Aerosol Substrate for Uniform Heat Distribution
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Solution Overview
Problem
Existing aerosol-forming substrates have low thermal conductivity, leading to uneven temperature distribution and reduced usage efficiency due to portions of the substrate not reaching high enough temperatures to release volatile compounds effectively.
Innovation Solution
An aerosol-forming substrate comprising a mixture of discrete elements made from materials with varying thermal conductivities, where one material has a higher thermal conductivity than the other, enhancing overall thermal conductivity and ensuring even temperature distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the aerosol-forming substrate uses material with low thermal conductivity, then the substrate can maintain temperature gradients for controlled aerosol release, but the temperature distribution becomes uneven and usage efficiency decreases
Solution Approach 1:
The substrate is constructed as a composite material containing both low thermal conductivity material (for controlled aerosol release) and high thermal conductivity material (for even temperature distribution). This composite structure resolves the contradiction by combining materials with complementary thermal properties, allowing the substrate to maintain both temperature uniformity and controlled release characteristics simultaneously.
2Ease of operation
If the substrate has low thermal conductivity, then volatile compounds can be released in a controlled manner, but portions of the substrate furthest from the heater do not reach high temperature and release fewer compounds
Solution Approach 1:
The composite substrate integrates low thermal conductivity material (providing controlled release) with high thermal conductivity material (ensuring sufficient heat reaches all portions). This allows the substrate to maintain controlled aerosol release while ensuring adequate volatile compound release from all regions, including those furthest from the heater.
Solution Approach 2:
Different regions of the substrate have different thermal conductivity properties - the low thermal conductivity material provides controlled release in specific zones, while the high thermal conductivity material ensures heat distribution to regions that would otherwise remain cool. This local differentiation of material properties resolves the contradiction between controlled release and sufficient compound release quantity.
3Ease of manufacture
If discrete elements of cut filler are used as substrate, then the substrate can be formed from aerosol-forming material, but the elements have few contact points and result in poor aerosol delivery
Solution Approach 1:
The discrete cut filler elements are combined with high thermal conductivity material to form a composite substrate. This composite structure maintains the ease of manufacture from cut filler while the high thermal conductivity material provides thermal pathways between discrete elements, ensuring adequate heat transfer and improving aerosol delivery efficiency despite the limited contact points between elements.
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
The increased thermal conductivity results in a higher proportion of the substrate reaching sufficient temperatures for volatile compound release, improving aerosol delivery efficiency and reducing heater power requirements.
Implementation Method 1
The discrete elements of the second material have an increased thermal conductivity compared with the first material and may act to transport heat through the aerosol forming substrate to heat discrete elements of the first material
Data Source
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AI summary
An aerosol-forming substrate comprises a first material and a second material, the first material being comprised in the aerosol-forming substrate as a first plurality of discrete elements and the second material being comprised in the aerosol-forming substrate as a second plurality of discrete elements. The first material comprises an aerosol-former and has a first thermal conductivity, and the second material has a second thermal conductivity that is greater than the first thermal conductivity. The presence of the discrete elements of the second material in the aerosol-forming substrate produces a substrate with augmented thermal conductivity resulting in improvements in aerosol generation and delivery.