Short Aerosol Substrate Rod for Nicotine Delivery and Cooling

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Solution Overview

Problem

Aerosol-generating articles that heat tobacco substrates face challenges in nicotine delivery and cooling, and there is a need for improved ease of use, secure insertion, and efficient heating of the substrate while minimizing waste.

Innovation Solution

Aerosol-generating articles with a relatively short rod of aerosol-generating substrate, typically less than 36 mm, are designed to increase the path length for aerosol cooling and optimize heating efficiency, using a ratio of the rod length to the total article length of less than 0.4, with a wrapper and optional downstream and upstream elements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If the heating temperature is increased to boost nicotine delivery, then nicotine delivery is improved, but the aerosol needs to be cooled to a greater extent and more rapidly

Engineering Contradiction:

Improvenicotine deliveryVSAvoidaerosol cooling requirement

Core Design Contradiction:

Quantity of substanceVSTemperature

Solution Approach 1:

The patent introduces a downstream section with cooling elements that extends the aerosol path length in the longitudinal dimension, allowing the aerosol to cool gradually over a longer distance rather than requiring rapid cooling at high temperature

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Temperature

If a high filtration efficiency segment is used to cool the mainstream smoke, then cooling is improved, but nicotine delivery is reduced

Engineering Contradiction:

Improveaerosol coolingVSAvoidnicotine delivery

Core Design Contradiction:

TemperatureVSQuantity of substance

Solution Approach 1:

The patent uses a downstream section with cooling elements as an intermediary component that provides gradual cooling through extended path length, avoiding the need for high filtration efficiency segments that would block nicotine delivery

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If the rod length is reduced to optimize heating efficiency, then heating efficiency is improved, but the total article length must be maintained for device compatibility

Engineering Contradiction:

Improveheating efficiencyVSAvoidarticle length

Core Design Contradiction:

ProductivityVSLength of moving object

Solution Approach 1:

The patent divides the article into distinct segments: a shortened rod section for efficient heating and a downstream section for cooling and device interface, allowing each segment to be optimized for its specific function while maintaining overall compatibility

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies different length characteristics to different sections of the article - the rod section has reduced length for heating efficiency while the downstream section provides the necessary length for device insertion and aerosol cooling

Inventive Principle:

Principle #3Local quality

4Loss of substance

If the rod length is reduced to minimize waste, then material waste is reduced, but the aerosol path length for cooling must be sufficient

Engineering Contradiction:

Improvetobacco material wasteVSAvoidaerosol path length

Core Design Contradiction:

Loss of substanceVSLength of moving object

Solution Approach 1:

The patent compensates for the reduced rod length by extending the downstream section in the longitudinal dimension, creating additional cooling path length without increasing the heated substrate length

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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

This design ensures effective nicotine delivery with reduced waste and improved user experience by allowing for efficient aerosol generation and cooling, while maintaining compatibility with existing devices.

Implementation Method 1

volatile compounds are released from the aerosol-generating substrate by heat transfer from the heat source

Methodology Applied

Scientific EffectHeat transfer: Conduction (thermal)

Implementation Method 2

As the released compounds cool, they condense to form an aerosol

Methodology Applied

Scientific EffectCondensation: Condensation

Implementation Method 3

electrically heated aerosol-generating devices have been proposed that comprise an internal heater blade which is adapted to be inserted into the aerosol-generating substrate

Methodology Applied

Scientific EffectThermal heating: Heating

Data Source

PatentEP4696155A1Aerosol-generating article with relatively short rod of aerosol- generating substrate

Publication Date: 2026.02.18 PHILIP MORRIS PRODUCTS SA

Figure 1~3a
Figure 3b~4b
Figure 5~7

AI summary

An aerosol-generating article comprises a rod of aerosol-generating substrate. The aerosol-generating article has a length of at least 60 millimetres. The rod of aerosol-generating substrate has a length of less than or equal to 36 millimetres. A ratio of the length of the rod of aerosol-generating substrate to the total length of the aerosol-generating article is less than or equal to 0.4.