Aerosol-Forming Substrate Gel Casting for Stable Heating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for manufacturing aerosol-forming substrates in heat-not-burn devices are complex and inefficient, leading to issues such as degradation, poor handling, and compromised heating efficiency.
Innovation Solution
A method involving the formation of an amorphous solid aerosol-forming layer on a carrier layer using a slurry that gels upon contact, utilizing a setting agent to simplify manufacturing and ensure effective bonding, with specific thickness and composition controls to enhance stability and heating efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional methods are used to manufacture aerosol-forming substrates, then the substrate can be produced, but the manufacturing process becomes complex and inefficient
Solution Approach 1:
The patent combines multiple manufacturing steps into a single casting process. The slurry is applied to a carrier and gelled in one operation, eliminating the need for separate layering, bonding, and drying steps that would otherwise be required. This merging of operations directly reduces manufacturing complexity while maintaining substrate integrity.
Solution Approach 2:
The carrier is pre-prepared with a setting agent before the slurry is applied. This preliminary preparation allows the slurry to gel immediately upon contact, enabling the formation of the complete aerosol-forming substrate in a single step rather than requiring multiple sequential operations. The pre-prepared carrier facilitates simplified manufacturing while ensuring proper substrate bonding.
2Reliability
If traditional manufacturing methods are used, then substrates can be produced, but degradation and poor handling occur
Solution Approach 1:
The patent controls critical parameters including slurry thickness (0.5-3.0 mm), composition ratios, and setting agent concentration to produce a gel structure that maintains substrate integrity. By optimizing these parameters during the single-step casting process, the substrate achieves both reliability and manufacturing efficiency, preventing degradation while simplifying production.
Solution Approach 2:
The aerosol-forming substrate is created as a composite material combining the slurry components (aerosol generating agent, gelling agent, and other formulations) with the carrier material. This composite structure, formed through the gelation process, provides enhanced substrate stability and handling characteristics while maintaining manufacturing efficiency through the integrated casting process.
3Strength
If the slurry layer is made thicker to improve bonding, then bonding strength increases, but heating efficiency decreases
Solution Approach 1:
The patent applies the slurry at an optimized thickness of 0.5-3.0 mm, which provides sufficient bonding strength without excessive material that would impede heat transfer. This partial application (not making the layer excessively thick) achieves the necessary bonding while maintaining adequate heating efficiency, balancing the two competing requirements through precise thickness control.
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 method simplifies manufacturing, maintains substrate integrity, and improves heating efficiency by ensuring strong bonding and controlled thickness, resulting in a stable and efficient aerosol generation process.
Implementation Method 1
the slurry gels on contact with the carrier
Implementation Method 2
The heating volatilises at least one component of the material, typically forming an inhalable aerosol
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
Disclosed herein is a method of making an aerosol- forming substrate (103), the aerosol- forming substrate comprising an aerosol-forming layer attached to a carrier layer, wherein the aerosol-forming layer comprises an amorphous solid, the method comprising; (a) forming a slurry comprising components of the amorphous solid or precursors thereof, (b) applying the slurry to a carrier, wherein the carrier comprises a setting agent, such that the slurry gels on contact with the carrier, and (c) drying the gel to form an amorphous solid.