Cellulose Acetate Tow Filter for Aerosol Delivery

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Solution Overview

Problem

Heated cigarettes that generate aerosol provide a relatively low amount of smoke to users due to high absorption resistance and aerosol removal capacity of the filter, necessitating research to increase smoke delivery.

Innovation Solution

An aerosol generating article featuring a filter with a cellulose acetate tow having a denier per filament of about 17 to 29 and a total denier of about 10,000 to 40,000, which reduces absorption resistance and increases rigidity, improving smoking satisfaction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a filter with high aerosol removal capacity is used, then health safety is improved, but smoke delivery to the user deteriorates

Engineering Contradiction:

Improveaerosol removal capacityVSAvoidsmoke delivery

Core Design Contradiction:

Object-affected harmful factorsVSQuantity of substance

Solution Approach 1:

The patent changes the physical parameters of the filter material by specifying cellulose acetate tow with denier per filament of 17-29 and total denier of 10,000-40,000. This parameter optimization reduces absorption resistance while maintaining appropriate aerosol removal capacity, thereby improving smoke delivery without compromising health safety.

Inventive Principle:

Principle #35Parameter changes

2Object-affected harmful factors

If the amount of filter material is increased, then aerosol removal capacity is improved, but absorption resistance increases

Engineering Contradiction:

Improveaerosol removal capacityVSAvoidabsorption resistance

Core Design Contradiction:

Object-affected harmful factorsVSStress or pressure

Solution Approach 1:

The patent optimizes the physical parameters of the filter material by specifying cellulose acetate tow with denier per filament of 17-29 and total denier of 10,000-40,000. This parameter optimization reduces absorption resistance while maintaining appropriate aerosol removal capacity, thereby improving smoke delivery without compromising health safety.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses cellulose acetate tow as a composite filter material that combines appropriate porosity, fiber diameter, and structural integrity to achieve both low absorption resistance and effective aerosol removal, resolving the contradiction between these two requirements.

Inventive Principle:

Principle #40Composite materials

3Stress or pressure

If thinner fibers are used in the filter, then absorption resistance is reduced, but filter rigidity deteriorates

Engineering Contradiction:

Improveabsorption resistanceVSAvoidfilter rigidity

Core Design Contradiction:

Stress or pressureVSStrength

Solution Approach 1:

The patent specifies cellulose acetate tow with denier per filament of 17-29 and total denier of 10,000-40,000, which optimizes the balance between fiber thickness and overall filter rigidity. This parameter range allows for reduced absorption resistance while maintaining sufficient structural integrity.

Inventive Principle:

Principle #35Parameter changes