Corrugated Planar Aerosol Substrate for Uniform Heating
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Solution Overview
Problem
A significant portion of the aerosol-forming substrate in conventional aerosol-generating articles does not get sufficiently heated to form an aerosol, contributing to manufacturing costs without enhancing user experience.
Innovation Solution
The aerosol-forming substrate is designed with a planar structure and corrugated layers to facilitate efficient heating, featuring low resistance to draw (RTD) and defined air-flow paths, allowing for rapid and uniform heating of a larger portion of the substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional cylindrical aerosol-forming substrate is used, then the article structure is simple and easy to manufacture, but a significant portion of the substrate does not get sufficiently heated to form an aerosol
Solution Approach 1:
The patent transitions from a conventional cylindrical (3D volumetric) aerosol-forming substrate to a planar (2D sheet-like) substrate with defined air-flow paths. This dimensional change allows the heating element to effectively heat a larger proportion of the aerosol-forming material, as the planar configuration reduces the distance heat must travel and improves thermal contact between the heater and substrate, thereby increasing aerosol generation efficiency and reducing unheated waste material.
2Temperature
If the aerosol-forming substrate is heated from the inside or outside using resistive or inductive heaters, then the heating method is flexible, but still a significant portion of the substrate remains insufficiently heated
Solution Approach 1:
The planar aerosol-forming substrate is divided into multiple regions with defined air-flow paths that segment the substrate into zones of controlled airflow. This segmentation allows for more uniform heat distribution across different areas of the substrate, ensuring that each segment receives adequate heating while maintaining overall substrate temperature uniformity, which directly improves aerosol delivery effectiveness.
3Productivity
If a planar aerosol-forming substrate with corrugated layers is used, then heating efficiency and aerosol delivery are improved, but the substrate structure becomes more complex
Solution Approach 1:
The patent employs a nested structure where corrugated layers are integrated within the planar aerosol-forming substrate. The corrugated layers are positioned between outer layers, creating a multi-layer nested configuration that enhances heating efficiency and aerosol delivery while maintaining a relatively compact and manufacturable structure. This nesting approach improves performance without proportionally increasing overall structural complexity.
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 design ensures that a greater proportion of the substrate is heated to release aerosol efficiently, minimizing waste and enhancing user experience by providing consistent aerosol delivery.
Implementation Method 1
the heating element of the aerosol-generating device may heat the aerosol-forming substrate of the aerosol-generating article so as to release an aerosol from the aerosol-forming substrate
Implementation Method 2
a significant portion of the plug of aerosol-forming substrate may not be sufficiently heated to form an aerosol during use
Data Source
AI summary
An aerosol-generating article for an aerosol-generating device to generate an inhalable aerosol is provided, the aerosol-generating article including: an article upstream end and an article downstream end, an article length extending from the article upstream end to the article downstream end; an aerosol-forming substrate including a first planar layer and a second planar layer; and one or more corrugated elements arranged between the first planar layer and the second planar layer, the one or more corrugated elements together extending at least 70% of the article length.