Composite Wrapper Structure for Leak-Resistant Aerosol Articles
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Solution Overview
Problem
Existing heating-type aerosol-generating articles face issues with liquid component leakage, inadequate aerosol generation, and temperature distribution, leading to insufficient nicotine transfer and potential separation of article parts during manufacturing.
Innovation Solution
The aerosol-generating article employs a first wrapper made of metal materials like aluminum, copper, or silver with high thermal conductivity and oil resistance, and a second wrapper made of cellulose, ensuring efficient heat transfer and reducing liquid leakage, while maintaining structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a general filter wrapping paper is used, then the manufacturing process is simple, but liquid components such as filler may leak
Solution Approach 1:
The patent employs a composite wrapper structure consisting of an inner wrapper made of oil-resistant material (such as aluminum foil, plastic film, or treated paper) and an outer wrapper made of filter material (such as cellulose acetate). This composite structure combines the oil-resistant properties of the inner wrapper with the filtration and structural properties of the outer wrapper, effectively preventing liquid leakage while maintaining manufacturing feasibility.
2Device complexity
If only direct heating is used, then the heating process is simple, but temperature distribution is uneven and aerosol generation is insufficient
Solution Approach 1:
The patent implements differential heating by applying different heating intensities to different regions of the aerosol-generating article. The first heating region receives higher temperature heating to vaporize liquid components, while the second heating region receives lower temperature heating to facilitate aerosolization. This local quality approach ensures uniform temperature distribution and effective aerosol generation without requiring complex heating systems.
3Use of energy by moving object
If a metal wrapper is added for heat transfer, then heat transfer efficiency improves, but the wrapper tensile strength requirement becomes more challenging
Solution Approach 1:
The patent creates a composite wrapper system where a thin metal layer (such as aluminum foil with thickness of 3-15 μm) is combined with a structural outer wrapper. The metal layer provides excellent thermal conductivity for efficient heat transfer, while the outer wrapper (made of materials like cellulose acetate) provides the necessary mechanical strength and structural integrity. This composite approach allows the wrapper to meet both heat transfer efficiency requirements (oil resistance of 5 or more) and tensile strength requirements (4.5 kgf or more) simultaneously.
4Productivity
If the heating temperature is increased to improve aerosol generation, then nicotine transfer improves, but liquid component leakage increases
Solution Approach 1:
The patent extracts the liquid containment function from the structural wrapper by introducing a separate inner wrapper specifically designed for oil and liquid resistance. This inner wrapper (made of materials such as aluminum foil, plastic film, or oil-resistant treated paper) is dedicated to preventing liquid leakage, while the outer wrapper focuses on providing structural support and filtration. This functional separation allows the system to operate at higher temperatures for improved aerosol generation without compromising liquid leakage 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 solution effectively reduces liquid leakage, enhances heat transfer to non-heated regions, maintains part integrity, and ensures consistent aerosol generation and nicotine transfer, improving the smoking experience.
Implementation Method 1
the first wrapper made of a metal material... with high thermal conductivity... enhances heat transfer to non-heated regions
Implementation Method 2
the first wrapper made of a metal material like aluminum, copper, or silver with high thermal conductivity and oil resistance... leakage of liquid components... may be reduced
Data Source
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AI summary
The resent disclosure relates to an aerosol-generating article including a first wrapper and a second wrapper, and an aerosol-generating system including the aerosol-generating article.