Thick Lightweight Substrate Wrappers for Aerosol Article Heating
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Solution Overview
Problem
Existing aerosol-generating articles face inefficiencies due to non-satisfactory heating of the aerosol-forming substrate, require a significant amount of substrate material, and lack mechanical robustness, making them unsuitable for use with existing devices.
Innovation Solution
The introduction of a thick and lightweight substrate wrapper with a thickness of 50 micrometers or more and a density of 800 kilograms per cubic meter or less, which compensates for the thinner aerosol-forming substrate, ensuring efficient thermal contact and mechanical robustness while maintaining the external diameter, allowing use with existing devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a thin substrate wrapper is used, then the external diameter can be reduced, but the mechanical robustness and thermal efficiency deteriorate
Solution Approach 1:
The patent changes the parameter of wrapper thickness from conventional thin dimensions to at least 50 micrometers, while controlling density to be 800 kg/m³ or less. This parameter change resolves the contradiction by providing sufficient mechanical robustness and thermal efficiency without excessively increasing external diameter, as the low density material achieves the required thickness with minimal volume addition.
Solution Approach 2:
The substrate wrapper is configured as a composite structure with specific thickness and density characteristics. By using a composite material approach with controlled porosity or cellular structure (implied by the density requirement), the wrapper achieves both mechanical strength and thermal conductivity properties that resolve the contradiction between robustness and size constraints.
2Strength
If a thick substrate wrapper is used, then mechanical robustness and thermal efficiency improve, but the external diameter increases
Solution Approach 1:
The patent resolves this contradiction by changing the density parameter of the wrapper material to be 800 kg/m³ or less. This allows the wrapper to achieve a thickness of at least 50 micrometers for mechanical robustness and thermal efficiency while minimizing the external diameter increase, as low density materials provide the required thickness with reduced volume and mass.
3Use of energy by moving object
If the aerosol-forming substrate diameter is reduced, then thermal contact efficiency improves, but the aerosolization capacity deteriorates
Solution Approach 1:
The thick substrate wrapper acts as an intermediary element that resolves the contradiction between thermal contact efficiency and aerosolization capacity. The wrapper with thickness of at least 50 micrometers provides improved thermal contact with the heating element, while the low density (800 kg/m³ or less) ensures that the substrate portion maintains sufficient volume and material for adequate aerosolization capacity.
4Productivity
If more aerosol-forming substrate is used, then aerosolization capacity improves, but the amount of material required increases
Solution Approach 1:
The patent changes the density parameter of the substrate wrapper to 800 kg/m³ or less, which allows the system to achieve the required aerosolization capacity with reduced total material quantity. The optimized thickness of at least 50 micrometers ensures efficient thermal contact, reducing the need for excessive substrate material while maintaining productivity.
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 thick and lightweight wrapper enhances thermal efficiency, reduces substrate material usage, and provides mechanical robustness, resulting in a more efficient aerosol-generating article that can be used with existing devices.
Implementation Method 1
The substrate wrapper may have a thickness of 50 micrometers or more. The substrate wrapper may have a density of 800 kilograms per cubic meter or less.
Implementation Method 2
The heating arrangement may be an induction heating arrangement and may comprise an induction coil configured to inductively heat a susceptor.
Data Source
AI summary
An aerosol-generating article is provided, including: an aerosol-forming substrate in an aerosol-forming substrate portion; and a substrate wrapper at least partly circumscribing the aerosol-forming substrate portion, the substrate wrapper including one or more layers having a same length in a longitudinal direction of the aerosol-generating article, the substrate wrapper having a thickness of 50 micrometers or more and a density of 450 kilograms per cubic meter or less, and the aerosol-forming substrate including at least 5 percent of aerosol former by weight on a dry weight basis. An aerosol-generating system including the aerosol-generating article and an aerosol-generating device is also provided.