Laminated Thermal Wrapper for Stable Carbon Heat Cigarettes

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Solution Overview

Problem

Existing carbon heat source-applied cigarettes face issues with inefficient heat transfer and nicotine delivery due to the lack of effective heat conducting wrappers, leading to unstable carbon heat sources and reduced smoking satisfaction.

Innovation Solution

A triply laminated paper wrapper comprising a first insulating layer, a metal layer, and a second insulating layer, with a specific length ratio and perforations, is used to enhance heat transfer and nicotine delivery by stabilizing the carbon heat source and optimizing airflow.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a carbon heat source is applied to a cigarette to reduce harmful constituents, then the harmful factors are reduced, but the heat generation stability deteriorates due to insufficient heat conduction

Engineering Contradiction:

Improveharmful constituentsVSAvoidheat generation stability

Core Design Contradiction:

Object-affected harmful factorsVSStability of the object's composition

Solution Approach 1:

A thermal conductive wrapper is introduced as an intermediary component between the carbon heat source and the tobacco rod. This wrapper has high thermal conductivity to efficiently transmit heat from the carbon heat source to the tobacco rod, ensuring stable heat generation while maintaining the low harmful constituents benefit of the carbon heat source

Inventive Principle:

Principle #24Intermediary (Mediator)

2Device complexity

If the carbon heat source is directly applied to the cigarette, then the structure is simple, but the heat conduction efficiency is insufficient

Engineering Contradiction:

ImprovestructureVSAvoidheat conduction efficiency

Core Design Contradiction:

Device complexityVSUse of energy by moving object

Solution Approach 1:

The thermal conductive wrapper is selectively applied only in the region where heat conduction is needed - specifically, it wraps around the carbon heat source and contacts the tobacco rod at the heating zone. This localized application improves heat conduction efficiency without unnecessarily complicating other parts of the cigarette structure

Inventive Principle:

Principle #3Local quality

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 enables efficient heat transfer and nicotine delivery, improving smoking satisfaction by maintaining the carbon heat source and enhancing nicotine yield.

Implementation Method 1

a thermal conductive wrapper, and a tobacco rod... The thermal conductive wrapper has a first end connected to the carbon heat source and a second end connected to the tobacco rod

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentEP4233574B1Thermal conductive wrapper for carbon heat source-applied cigarette and cigarette including same

Publication Date: 2026.04.29 KT&G CO LTD

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AI summary

Provided are a heat conducting wrapper for a carbon heat source-applied cigarette, in which the wrapper is triply laminated paper including a first insulating layer, a metal layer, and a second insulating layer, and a carbon heat source-applied cigarette including the wrapper.