Cigarette Wrapper with Metal Flake Paste for Uniform Heat Transfer
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Solution Overview
Problem
Conventional cigarette wrappers do not effectively manage heat transfer during smoking, leading to inconsistent tobacco taste and potential burning issues in heating-type cigarettes.
Innovation Solution
A cigarette wrapper with a pulp layer containing uniformly distributed metal flake paste, made from materials like aluminum, steel, or copper, which enhances thermal conductivity and prevents burning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional cigarette wrappers are used, then the structure is simple and easy to manufacture, but heat transfer is inconsistent leading to poor tobacco taste and potential burning issues
Solution Approach 1:
The wrapper combines pulp material with metal particles (aluminum, steel, or copper) to create a composite structure. The metal particles are uniformly distributed within the pulp matrix, forming a composite material that leverages the thermal conductivity of metals while maintaining the structural properties of pulp, thereby achieving uniform heat transfer without excessive complexity
Solution Approach 2:
The invention introduces metal particles with high thermal conductivity into specific regions of the wrapper where heat transfer enhancement is needed. This localized addition of functional material improves heat distribution properties without requiring the entire wrapper structure to be complex or metallic, thus balancing performance improvement with manufacturing simplicity
2Reliability
If metal particles are added to enhance thermal conductivity, then heat transfer uniformity improves, but the manufacturing process becomes more complex
Solution Approach 1:
The invention controls the size, shape, and distribution parameters of metal particles within the wrapper. By optimizing these parameters (using small particles with average diameter of 0.1-10 μm and controlling their uniform distribution), the patent achieves reliable heat transfer consistency while keeping the manufacturing process manageable through parameter optimization rather than complex process changes
3Temperature
If metal flake paste is used to improve thermal conductivity, then tobacco taste uniformity improves, but the risk of combustion increases
Solution Approach 1:
The wrapper utilizes the porous structure of pulp material as a matrix to hold and distribute metal particles. This porous structure allows for controlled heat distribution while the pulp matrix itself acts as a barrier that prevents the metal particles from reaching temperatures high enough to cause combustion, thus improving temperature uniformity while mitigating combustion risk
Solution Approach 2:
The pulp matrix serves as an intermediary between the heat source and the metal particles. It distributes heat uniformly through the wrapper while preventing direct contact between high-temperature sources and metal particles, thereby achieving tobacco temperature uniformity without increasing combustion risk
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 wrapper maintains a consistent tobacco taste through uniform heat transfer and minimizes the risk of burning by promoting efficient heat conduction and convective heat transfer, while preventing combustion.
Implementation Method 1
thermal conductivity of a wrapper wrapping at least a part of the cigarette may be increased
Implementation Method 2
as hot air supplied by a heater comes into contact with air introduced through a periphery of a tobacco rod, forced convective heat transfer of the tobacco rod is minimized or removed
Data Source
Figure 1
Figure 2
Figure 3~3(b)
AI summary
A wrapper according to an aspect includes a pulp layer and metal particles uniformly distributed inside the pulp layer, wherein the metal particles contain a metal flake paste.