Foil-Free Mentholated Paper Wrapper for Inner Bundle Recycling

Solution Overview

Problem

Existing wrappers for aerosol provision articles that provide a barrier to menthol are expensive, generate high CO2 emissions, and are difficult to recycle due to the use of materials like aluminium foil.

Innovation Solution

A wrapper comprising a mentholated paper layer with a varnish layer on one side, which is free from aluminium foil, and a paper weight ranging from 40 to 80 gsm, allowing for effective menthol transfer while being recyclable and reducing CO2 emissions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If aluminium foil layer is used in wrapper, then menthol barrier properties are improved, but recyclability deteriorates and CO2 emissions increase

Engineering Contradiction:

Improvementhol barrier propertiesVSAvoidrecyclability

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The invention removes the aluminium foil layer from the wrapper structure entirely. The wrapper consists only of a paper layer and a varnish layer, extracting the problematic metal component that prevented recycling and caused high CO2 emissions, while maintaining menthol barrier functionality through the varnish layer alone

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention changes the material composition parameters of the wrapper by replacing aluminium foil with a varnish-coated paper structure. This parameter change maintains the necessary barrier properties against menthol while improving environmental sustainability and recyclability

Inventive Principle:

Principle #35Parameter changes

2Reliability

If aluminium foil layer is used in wrapper, then menthol barrier properties are improved, but manufacturing cost increases

Engineering Contradiction:

Improvementhol barrier propertiesVSAvoidmanufacturing cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The invention removes the aluminium foil layer from the wrapper structure entirely. The wrapper consists only of a paper layer and a varnish layer, extracting the problematic metal component that prevented recycling and caused high CO2 emissions, while maintaining menthol barrier functionality through the varnish layer alone

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention replaces expensive aluminium foil with a cheaper paper-based structure coated with varnish. This substitution reduces material costs while maintaining the necessary functional performance for menthol barrier properties

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Reliability

If aluminium foil layer is used in wrapper, then menthol barrier properties are improved, but CO2 emissions increase

Engineering Contradiction:

Improvementhol barrier propertiesVSAvoidCO2 emissions

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The invention removes the aluminium foil layer from the wrapper structure entirely. The wrapper consists only of a paper layer and a varnish layer, extracting the problematic metal component that prevented recycling and caused high CO2 emissions, while maintaining menthol barrier functionality through the varnish layer alone

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention changes the material composition parameters of the wrapper by replacing aluminium foil with a varnish-coated paper structure. This parameter change maintains the necessary barrier properties against menthol while improving environmental sustainability and recyclability

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 solution provides a cost-effective and environmentally friendly wrapper that effectively transfers menthol to aerosol provision articles while being fully recyclable, reducing CO2 emissions by up to 35% compared to traditional materials.

Implementation Method 1

The mentholated paper layer may comprise a sprayed layer of menthol

Methodology Applied

Scientific EffectSpraying: Fluid Spray

Implementation Method 2

The mentholated paper layer may comprise a deposited solvent layer of menthol

Methodology Applied

Scientific EffectDeposition: Deposition (physical)

Implementation Method 3

the deposited solvent layer of menthol may be at least partially dispersed through the paper material

Methodology Applied

Scientific EffectDispersion: Dispersion (of waves)

Implementation Method 4

a varnish layer on one side of the mentholated paper layer

Methodology Applied

Scientific EffectBarrier resistance:

Implementation Method 5

heating the paper material in the sealed container

Methodology Applied

Scientific EffectHeating: Heating

Data Source

PatentEP4636159A1A wrapper for forming an inner bundle

Publication Date: 2025.10.22 BRITISH AMERICAN TOBACCO EXPORTS LTD

Figure 1~2
Figure 3~5

AI summary

The present application relates to a wrapper for forming an inner bundle for a package for an aerosol provision article. The inner bundle comprises a mentholated paper layer comprising a paper material to which menthol has been applied and a varnish layer on one side of the mentholated paper layer. The present application also relates to an inner bundle formed from the wrapper, a package comprising the inner bundle, and a method of forming an inner bundle for a package.