Tubular Element With Gel-Loaded Threads for Aerosol Leakage Control

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Solution Overview

Problem

Aerosol generating articles with liquid components face issues of leakage during manufacturing, transport, and storage, and there is a need for an efficient flow control system to deliver aerosol effectively.

Innovation Solution

A tubular element with a longitudinal passageway containing threads loaded with gel, which may include a susceptor, is designed to minimize leakage and enhance aerosol delivery, using materials like paper or cellulose acetate for the wrapper and gel comprising active agents such as nicotine.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If liquid is used in aerosol generating articles, then aerosol generation is enabled, but leakage occurs during manufacturing, transport and storage

Engineering Contradiction:

Improveleakage preventionVSAvoidmanufacturing complexity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent changes the physical state of the active agent from liquid to gel form. This parameter change eliminates leakage issues during manufacturing, transport and storage while maintaining the ability to generate aerosol when heated, as the gel structure provides stability without sacrificing functional performance.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses a composite structure consisting of a wrapper, threads, and gel material. This composite approach combines the structural integrity of the wrapper and threads with the aerosol-generating properties of the gel, creating a system that prevents leakage while enabling effective aerosol generation.

Inventive Principle:

Principle #40Composite materials

2Reliability

If gel is used instead of liquid, then leakage is reduced, but aerosol delivery efficiency may be compromised

Engineering Contradiction:

Improveleakage preventionVSAvoidaerosol delivery efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The gel is pre-loaded into threads during manufacturing, preparing the active agent for efficient delivery. When heated, the gel's pre-positioned structure allows controlled release and effective aerosol generation, ensuring that the transition from gel to aerosol occurs efficiently during use.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The use of threads as a carrier structure provides a porous matrix that holds the gel. This porous structure allows for controlled heating and efficient aerosol generation when the gel is heated, maintaining productivity while benefiting from the leakage-prevention properties of the gel form.

Inventive Principle:

Principle #31Porous materials

3Reliability

If threads loaded with gel are used, then leakage is minimized and aerosol delivery is enhanced, but device complexity increases

Engineering Contradiction:

Improveleakage preventionVSAvoidstructural complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The active agent is segmented into thread form rather than using a bulk liquid reservoir. This segmentation into multiple thin threads loaded with gel reduces the overall structural complexity compared to traditional liquid containment systems, while simultaneously minimizing leakage and enhancing aerosol delivery surface area.

Inventive Principle:

Principle #1Segmentation

4Ease of manufacture

If traditional liquid reservoir is used, then manufacturing is simpler, but leakage and storage problems occur

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidstorage stability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent changes the physical state parameter from liquid to gel, which fundamentally improves storage stability by eliminating flow and leakage characteristics while maintaining ease of manufacture through the thread-loading process described in the patent.

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

The tubular element reduces leakage risks and efficiently delivers aerosol by utilizing gel-based threads, ensuring stable storage and effective aerosol generation with reduced energy consumption.

Implementation Method 1

threads loaded with gel, wherein the gel comprises an active agent

Methodology Applied

Scientific EffectAbsorption: Absorption (physical)

Implementation Method 2

a susceptor adjacent to at least one thread loaded with gel

Methodology Applied

Scientific EffectElectromagnetic heating: Dielectric Heating

Implementation Method 3

the tubular element further comprises a second tubular element... efficiently delivers aerosol generated from the tubular element

Methodology Applied

Scientific EffectEvaporation: Evaporation

Data Source

PatentUS12439956B2Tubular element with threads for use with an aerosol generating article

Publication Date: 2025.10.14 PHILIP MORRIS PRODUCTS SA

AI summary

A tubular element for an aerosol-generating article is provided, the tubular element having a longitudinal length and including: a first wrapper that forms a first longitudinal passageway; and a plurality of porous threads loaded with gel and running longitudinally, parallel to the longitudinal length of the tubular element, the gel including an aerosol former and an active agent, the aerosol former including between 60 percent and 95 percent by weight of glycerol, and the active agent including nicotine.