Calcium Carbonate Rolled Tobacco Sheet for Low-Heat Drying
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Solution Overview
Problem
Existing methods for producing tobacco sheets, such as sheet-forming and casting, require high moisture content reduction, leading to increased production costs, and there is a need for materials with better thermal conductivity to enhance combustible and heat-not-burn smoking articles.
Innovation Solution
Using the rolling method and incorporating calcium carbonate as a raw material, with specific particle size and content, to produce a rolled sheet that maintains low production costs and improves thermal conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If sheet-forming or casting methods are used to produce tobacco sheets, then the tobacco sheet can be formed, but a large amount of heat is required to reduce moisture content from approximately 80% to predetermined range, increasing production costs
Solution Approach 1:
The invention changes the moisture content parameter of the raw material composition from the conventional high moisture content (approximately 80% in casting method) to a low moisture content (approximately 50% or less in rolling method). This parameter change directly reduces the amount of heat energy required for drying while maintaining the ability to form a tobacco sheet with desired properties
Solution Approach 2:
The invention uses calcium carbonate, which is inexpensive and readily available, as an additive in the tobacco sheet. This cheap material provides thermal conductivity enhancement without significantly increasing production cost, allowing energy savings from reduced drying requirements to be maintained
2Temperature
If calcium carbonate is mixed with tobacco material to enhance thermal conductivity, then thermal conductivity is improved for better control of burning and aerosol generation, but the complexity of material composition increases
Solution Approach 1:
The invention creates a composite material by mixing calcium carbonate with tobacco material. This composite structure combines the organic tobacco components with inorganic calcium carbonate particles, achieving enhanced thermal conductivity while maintaining the functional properties of tobacco. The calcium carbonate serves multiple functions: thermal conductivity enhancement, cost reduction, and potential combustion control
Solution Approach 2:
The invention controls the particle size parameter of calcium carbonate within a specific range (0.07-80 μm, preferably 0.1-50 μm) to optimize thermal conductivity while maintaining ease of mixing and processing. This parameter control ensures that the composite material remains manageable and does not excessively increase processing 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
The solution results in a rolled sheet with reduced production costs and enhanced thermal conductivity, enabling better control of smoking article performance, including static burning and aerosol generation.
Implementation Method 1
mixing a substance having better thermal conductivity than the tobacco raw material with a tobacco material... Calcium carbonate is inexpensive and will also lead to further cost reductions
Implementation Method 2
the moisture content of the raw material composition is reduced to a predetermined numerical range by means of the drying process... it is possible to reduce the moisture content of the kneaded material to the predetermined numerical range using a small amount of heat
Data Source
Figure 1~2
AI summary
The present invention addresses the problem of providing a rolled sheet which can be manufactured at a low cost and has good thermal conductivity. This rolled sheet contains calcium carbonate.