Folded Tobacco Wrapper Structure for Low-Resistance Aerosol Flow

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Solution Overview

Problem

Aerosol-generating articles using reconstituted tobacco leaves or pipe tobaccos experience increased draw resistance and tobacco material discharge when generating aerosols, and tobacco materials in particle form can escape the article.

Innovation Solution

An aerosol-generating article with a tobacco filling part featuring folds on an inner wrapper, where tobacco granules adhere, and a thermally conductive wrapper around the aerosol generator and tobacco filling part to transmit heat, ensuring stable adhesion and efficient tobacco component transfer.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If reconstituted tobacco leaves or pipe tobaccos are used as medium, then aerosols can be generated, but draw resistance increases when aerosols are generated and flow

Engineering Contradiction:

Improvetobacco material contentVSAvoiddraw resistance

Core Design Contradiction:

Quantity of substanceVSEase of operation

Solution Approach 1:

The tobacco material is divided into granules instead of using continuous reconstituted tobacco leaves or pipe tobaccos. This segmentation allows the tobacco material to be distributed more evenly throughout the aerosol generation process, preventing clogging and reducing draw resistance while maintaining adequate tobacco content for aerosol generation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The inner wrapper is designed with folds at specific locations to hold granules, creating localized regions with different functional properties. The folds provide anchoring points for granules while maintaining open channels for aerosol flow, achieving both tobacco material retention and low draw resistance.

Inventive Principle:

Principle #3Local quality

2Quantity of substance

If tobacco material is provided in the form of particles, then aerosol generation is enabled, but tobacco material may be discharged to the outside of the aerosol-generating article

Engineering Contradiction:

Improvetobacco material availabilityVSAvoidtobacco material retention

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The inner wrapper is pre-formed with folds before tobacco granules are applied. These folds serve as pre-prepared anchoring structures that securely hold the granules in place during aerosol generation, preventing discharge while ensuring continuous tobacco material availability for aerosol generation.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The folds in the inner wrapper act as an intermediary structure between the tobacco granules and the aerosol flow. They provide mechanical retention for the granules while allowing the aerosol to pass through, preventing tobacco material discharge without blocking aerosol generation.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If granules of tobacco material are used, then transfer rate of tobacco component increases, but adhesion stability may be compromised

Engineering Contradiction:

Improvetobacco component transfer rateVSAvoidadhesion stability

Core Design Contradiction:

ProductivityVSStability of the object's composition

Solution Approach 1:

The inner wrapper surface is segmented into folds, creating multiple anchoring points for tobacco granules. This segmentation increases the total surface area for adhesion while maintaining the granular structure's high transfer rate capability. The folds provide mechanical interlocking that enhances adhesion stability without compromising granule integrity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The folds in the inner wrapper create curved surfaces that facilitate granule adhesion through mechanical interlocking. The curved geometry of the folds allows granules to be securely held while maintaining contact with the wrapper surface, ensuring stable adhesion that prevents discharge during aerosol generation.

Inventive Principle:

Principle #14Spheroidality (Curvature)

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 tobacco material in granule form provides high transfer rates and abundant atomization with improved smoking continuity, while adhering stably to the inner wrapper and conducting heat effectively.

Implementation Method 1

a thermally conductive wrapper wrapped around at least part of outer surfaces of the aerosol generator and the tobacco filling part, and configured to transmit heat to the aerosol-generating material and the tobacco material

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

an aerosol generator including an aerosol-generating material configure to vaporize into an aerosol

Methodology Applied

Scientific EffectVaporization: Evaporation

Data Source

PatentEP4087416B1Aerosol-generating article and manufacturing method of the same

Publication Date: 2026.01.21 KT&G CO LTD

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AI summary

The present disclosure provides an aerosol-generating article including an aerosol generator including: an aerosol generator comprising an aerosol-generating material configure to vaporize into an aerosol; a tobacco filling part comprising an inner wrapper on which a plurality of folds are formed, and granules of a tobacco material attached to the plurality of folds such that a tobacco component is added to the aerosol passing through the tobacco filling part; and a thermally conductive wrapper wrapped around at least part of outer surfaces of the aerosol generator and the tobacco filling part, and configured to transmit heat to the aerosol-generating material and the tobacco material.