Nicotine Salt Cellulose Sheet Aerosol Generation
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Solution Overview
Problem
Existing e-cigarettes require users to handle liquid formulations containing free nicotine base, which can be cumbersome and unstable, leading to undesirable user experience and potential nicotine delivery issues.
Innovation Solution
A sheet comprising cellulosic material and one or more nicotine salts, where the cellulosic material is predominantly cellulose powder, allowing for the generation of a nicotine-containing aerosol without the need for handling liquid formulations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If liquid formulations containing free nicotine base are used in e-cigarettes, then nicotine delivery can be achieved, but users are required to handle liquid formulations which is cumbersome and unstable
Solution Approach 1:
The invention changes the physical state of nicotine from liquid (free base) to solid (salt form) and alters the delivery mechanism from liquid handling to thermal decomposition. This transforms the system from requiring liquid handling to generating aerosol through heating, thereby improving both stability and ease of operation
Solution Approach 2:
The invention replaces the mechanical liquid handling system with a thermal field-based system. Instead of requiring users to handle and pump liquid formulations, the system uses thermal decomposition of nicotine salts to generate aerosol, substituting mechanical operations with thermal energy input
2Duration of action of stationary object
If liquid formulations with free nicotine base are used, then aerosol can be generated, but shelf life is reduced due to instability
Solution Approach 1:
The invention changes the chemical form of nicotine from free base to salt, fundamentally altering the stability parameters. Nicotine salts are more stable than free base liquids, thereby extending shelf life while maintaining the ability to generate aerosol through thermal decomposition
3Quantity of substance
If conventional e-cigarette heating temperatures are used, then sufficient aerosol can be generated, but high battery power and large devices are required
Solution Approach 1:
The invention changes the thermal decomposition temperature parameter of nicotine from high (conventional e-cigarette temperatures) to low (120-220°C for nicotine salts). This parameter change enables aerosol generation at much lower temperatures, significantly reducing energy consumption while maintaining effective aerosol production
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 solution provides a stable and efficient delivery of nicotine in the form of a nicotine-containing aerosol, eliminating the need for liquid handling and potentially offering longer shelf life and lower temperature operation compared to traditional e-cigarettes.
Implementation Method 1
Liquid at the second end of the wick is vaporised by the heating element
Implementation Method 2
Liquid is transferred from the liquid storage portion towards the heating element by capillary action in the wick
Data Source
AI summary
A heatable aerosol-generating article is provided, including an aerosol generating rod, the aerosol generating rod including a sheet for an aerosol-generating device, the sheet including: cellulosic material including cellulose powder, a weight ratio of cellulose powder to total cellulosic material in the sheet on a dry weight basis being greater than about 1:2; one or more nicotine salts; and at least one aerosol former, the sheet having an aerosol former content of at least 10% by weight on a dry weight basis, the sheet including no tobacco material, and a weight ratio of aerosol former to nicotine salt in the sheet on a dry weight basis being between 15:1 and 3:1.