Semi-Solid Vaping Substrate with Carboxylic Acids

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Solution Overview

Problem

Heat-not-burn aerosol-generating articles, such as e-cigarettes, often cause coughing fits due to differences in inhalation methods and irritants in e-liquids, leading to an unpleasant vaping experience.

Innovation Solution

An aerosol-generating substrate comprising up to 1.0 wt.% carboxylic acid-containing alcohol solution, where carboxylic acids like stearic acid and decanoic acid are dissolved in a mixture with propylene glycol, glycerol, and water, forming a semi-solid foam substrate that reduces throat irritation and improves taste.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If conventional e-liquid formulations are used, then aerosol generation is achieved, but coughing fits and throat irritation occur

Engineering Contradiction:

Improvecoughing fitVSAvoidvaping experience

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent changes the chemical parameters of the e-liquid by incorporating carboxylic acids (such as stearic acid, decanoic acid, capric acid, lauric acid, myristic acid, palmitic acid, or stearic acid) at specific concentrations (0.1-5.0 wt%). This parameter change modifies the chemical composition to reduce throat irritation and coughing fits while maintaining aerosol generation functionality

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite e-liquid formulation by combining traditional e-liquid components (propylene glycol, glycerol, water, flavorings, nicotine) with carboxylic acid compounds. This composite material approach integrates multiple functional components to simultaneously achieve aerosol generation, throat comfort, and pleasant taste

Inventive Principle:

Principle #40Composite materials

2Object-affected harmful factors

If carboxylic acid-containing alcohol solution is added to reduce coughing fit, then throat irritation decreases, but manufacturing complexity increases

Engineering Contradiction:

Improvethroat irritationVSAvoidsubstrate preparation

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The patent performs preliminary action by pre-mixing carboxylic acids with alcohol solutions (ethanol, isopropanol, or n-propanol) at defined concentrations before incorporating them into the e-liquid formulation. This pre-prepared carboxylic acid-containing alcohol solution can be directly added to the substrate, simplifying the overall manufacturing process despite the additional component

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses alcohol solutions as intermediaries to deliver carboxylic acids into the e-liquid substrate. The alcohol acts as a solvent and carrier, facilitating the incorporation of carboxylic acids in a controlled manner that maintains formulation stability and simplifies the manufacturing process

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20230082862A1An Aerosol-Generating Substrate for Vaping Comprising Semi-Solid Substrate

Publication Date: 2023.03.16 JT INTERNATIONAL SA

AI summary

An aerosol-generating substrate for vaping includes a semi-solid substrate, wherein up to about 1.0% of the total weight percentage of the aerosol-generating substrate is comprised of one or more carboxylic acids dissolved in an alcohol solution. A method of manufacturing the aerosol-generating substrate and a use thereof in an aerosol-generating substrate for vaping are also provided.