Heat-Not-Burn Tobacco Product with Segmented Heating Sections
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Solution Overview
Problem
Current heat-not-burn (HNB) tobacco products face challenges such as complex manufacturing processes, high processing costs, and the formation of undesirable chemical compounds due to high heating temperatures, which limit aerosol precursor loading and increase harmful chemical production.
Innovation Solution
A heat-not-burn tobacco product design featuring two separate heating sections, with a liquid aerosol precursor in one section and a solid tobacco substrate in the other, separated by a vapor-permeable but liquid-impermeable thermal barrier, allowing for lower heating temperatures and increased aerosol precursor loading, thereby reducing the formation of harmful chemicals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If aerosol precursors are chemically bound to solid tobacco and other formulation ingredients during formation of the HNB substrate, then the substrate structure is stabilized, but the manufacturing process becomes complicated and processing costs increase
Solution Approach 1:
The invention divides the heating system into two separate heating sections: a first heating section for vaporizing liquid aerosol precursors and a second heating section for heating solid tobacco substrate. This segmentation allows each section to operate independently with optimized heating parameters, avoiding the need for complex chemical binding processes while maintaining substrate stability.
Solution Approach 2:
The invention extracts the liquid aerosol precursors from the solid substrate structure and places them in a separate first heating section. This extraction eliminates the need for chemical binding between aerosol precursors and solid ingredients, simplifying the manufacturing process while maintaining the functional integrity of the substrate.
2Productivity
If solid tobacco and aerosol precursors are heated at high temperatures (225-350°C) to achieve sufficient vaporization, then aerosol generation is improved, but undesirable tobacco-based chemical compounds are formed
Solution Approach 1:
The heating system is segmented into two sections with different temperature profiles. The first heating section operates at lower temperatures optimized for liquid aerosol precursor vaporization, while the second heating section operates at higher temperatures for solid tobacco heating. This segmentation prevents the formation of harmful chemicals by avoiding high-temperature exposure of liquid precursors.
Solution Approach 2:
Different local heating conditions are applied to different components: the first heating section provides gentle heating suitable for liquid aerosol precursors, while the second heating section provides intense heating for solid tobacco substrate. This local differentiation of heating quality optimizes aerosol generation while minimizing harmful chemical formation.
3Use of energy by moving object
If a larger amount of thermal energy is applied to vaporize chemically bound aerosol precursors in solid substrate, then vaporization is achieved, but harmful chemicals are produced due to tobacco chemical reactions
Solution Approach 1:
The liquid aerosol precursors are extracted from the solid substrate and placed in a separate first heating section. This extraction eliminates the need to apply high thermal energy to break chemical bonds in the solid substrate, as the liquid precursors can be vaporized at lower temperatures, thereby preventing harmful chemical reactions in the tobacco.
4Ease of manufacture
If aerosol precursor loading is limited to not more than 20% by w/w in solid substrates, then the substrate remains dry and does not require liquid impermeable containers, but the amount of aerosol precursor is insufficient for effective vaporization
Solution Approach 1:
The invention segments the aerosol precursor delivery system by placing liquid precursors in a separate first heating section rather than embedding them in the solid substrate. This allows the solid substrate in the second heating section to maintain its dry, simple form for easy manufacturing, while the liquid precursors can be loaded in sufficient quantities in the first section for effective vaporization.
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 simplifies the manufacturing process, reduces processing costs, and minimizes the production of heat-induced toxic compounds like TSNA's, while enabling higher aerosol precursor loading and improving the safety of the inhaled aerosol.
Implementation Method 1
a first thermal barrier that is vapor permeable but liquid impermeable located between the first heating section and the second heating section
Implementation Method 2
When the tobacco is heated in a HNB cigarette, substances such as nicotine and aroma in the tobacco are evaporated to produce smoke
Implementation Method 3
the first thermal barrier is formed between the first heating section and the second heating section to control the temperature
Data Source
AI summary
A heat-not-burn tobacco aerosol source member or consumable includes a first heating section with a front end. The first heating section contains a liquid aerosol precursor existing as a free liquid in an unbound form. A second heating section is provided with a mouth end. The second heating section contains a solid tobacco substrate. A first thermal barrier that is vapor permeable but liquid impermeable is located between the first heating section and the second heating section. The system has a simple structure and lowers processing costs, and greatly reduces undesirable harmful chemicals because of its lower heating temperatures for the first and second heating sections of the consumable.