Cavity-Filled Aerosol Articles for Uniform Nicotine Transfer

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Solution Overview

Problem

Existing aerosol-generating devices and articles face challenges in ensuring uniform nicotine transfer, smoking taste, and varying intensity without heating, while also dealing with free nicotine instability and device preheating requirements.

Innovation Solution

An aerosol-generating article with a medium segment filled with a tobacco medium at least 50 vol% and pH-treated to 7.0 to 9.5, combined with segments adsorbing nicotine, and an aerosol-generating system with a controller and vaporizer for non-heating aerosol generation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If heating is used to generate aerosol, then aerosol generation efficiency is improved, but device complexity and energy consumption increase

Engineering Contradiction:

Improveaerosol generation efficiencyVSAvoiddevice complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent extracts the heating function from the aerosol-generating article itself, placing it only in the external device. The article contains only nicotine-containing medium and segments for adsorption, while the device provides heating and aerosol generation, simplifying the article structure.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces segments (filter segments) as intermediaries between the nicotine-containing medium and the user. These segments adsorb nicotine and other substances, mediating the transfer process and enabling controlled nicotine delivery without direct heating of the article components.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If heating is used to generate aerosol, then aerosol generation efficiency is improved, but energy consumption increases

Engineering Contradiction:

Improveaerosol generation efficiencyVSAvoidenergy consumption

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

The heating function is extracted from the article and placed in the external device, allowing for more efficient energy use. The device can control heating precisely, and the article does not require self-heating capability, reducing overall energy consumption.

Inventive Principle:

Principle #2Taking out (Extraction)

3Quantity of substance

If filling volume of tobacco medium is increased, then nicotine transfer amount is improved, but uniformity of nicotine transfer deteriorates

Engineering Contradiction:

Improvenicotine transfer amountVSAvoiduniformity of nicotine transfer

Core Design Contradiction:

Quantity of substanceVSManufacturing precision

Solution Approach 1:

The patent divides the article into multiple segments (first segment, medium segment, second segment) with the tobacco medium distributed across these segments. This segmentation allows for better control of nicotine distribution and transfer uniformity while maintaining adequate total nicotine content.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different segments have different properties - the first and second segments contain cellulose acetate for adsorption, while the medium segment contains the tobacco medium. This local differentiation optimizes both nicotine transfer amount and uniformity by assigning specific functions to specific regions.

Inventive Principle:

Principle #3Local quality

4Stability of the object's composition

If pH treatment is applied to tobacco medium, then free nicotine instability is reduced, but manufacturing complexity increases

Engineering Contradiction:

Improvefree nicotine instabilityVSAvoidmanufacturing complexity

Core Design Contradiction:

Stability of the object's compositionVSEase of manufacture

Solution Approach 1:

The patent applies pH treatment to the tobacco medium, adjusting the pH parameter to a specific range (7.0-9.5) to stabilize free nicotine. This parameter change reduces nicotine instability without requiring complex manufacturing processes, as pH adjustment is a straightforward chemical treatment.

Inventive Principle:

Principle #35Parameter changes

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

Ensures uniform nicotine transfer, consistent smoking taste, and adjustable intensity without heating, minimizing free nicotine instability and extending device life through pH-adjusted nicotine adsorption and non-heating operation.

Implementation Method 1

Nicotine spread from the tobacco medium may be adsorbed into at least one of the first segment and the second segment

Methodology Applied

Scientific EffectDiffusion: Diffusion

Implementation Method 2

Nicotine spread from the tobacco medium may be adsorbed into at least one of the first segment and the second segment

Methodology Applied

Scientific EffectAdsorption: Adsorption

Implementation Method 3

a vaporizer configured to generate an aerosol by heating a liquid composition and emit the aerosol toward the aerosol-generating article

Methodology Applied

Scientific EffectEvaporation: Evaporation

Data Source

PatentUS20250302112A1Aerosol-generating articles and aerosol-generating systems

Publication Date: 2025.10.02 KT&G CO LTD

AI summary

An aerosol-generating article according to an embodiment includes a medium segment comprising a cavity and at least one of a first segment disposed upstream of the medium segment and a second segment disposed downstream of the medium segment, wherein the cavity is filled with a medium and a filling rate of the medium in the cavity may be at least 50 vol %.