Wrapper Paper Fiber Opening for Stronger Aerosol Article Adhesion
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Solution Overview
Problem
Existing aerosol-generating article wrappers face challenges in achieving high adhesive strength without compromising the grammage of the paper wrapper, leading to potential issues with the integrity and robustness of the aerosol-generating articles.
Innovation Solution
An apparatus and method that alter the paper fiber structure to reduce cohesion on one surface while maintaining or increasing it on the other, allowing for enhanced adhesive application and improved adhesion properties, utilizing a paper fiber opening unit and adhesive applicator to create altered fiber structures and apply adhesive strategically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the grammage of the wrapper paper is increased to improve adhesive strength, then the adhesive strength is improved, but the wrapper paper becomes thicker and may cause curling
Solution Approach 1:
The invention applies local quality by treating only specific regions of the wrapper paper with the paper fiber opening element. The blade contacts and alters paper fibers locally at the adhesive application region, creating opened fiber structures only where needed for adhesive bonding, while leaving other regions of the paper unchanged. This localized treatment enhances adhesive strength without requiring increased grammage across the entire wrapper paper.
Solution Approach 2:
The invention changes the physical parameter of paper fiber structure through mechanical action. The paper fiber opening element (blade) mechanically opens and separates paper fibers in the adhesive application region, altering the fiber density and structure. This parameter change increases the surface area and porosity locally, enabling better adhesive penetration and bonding without increasing the overall thickness of the wrapper paper.
2Stability of the object's composition
If the grammage of the wrapper paper is increased to prevent curling, then the structural stability is improved, but the adhesive strength may be compromised due to altered adhesive absorption
Solution Approach 1:
The invention uses local quality by creating differential fiber structure only in the adhesive application region. The blade opens paper fibers locally where adhesive will be applied, while the rest of the wrapper paper maintains its original dense fiber structure for stability. This localized fiber opening allows controlled adhesive absorption and bonding without compromising the overall structural stability of the wrapper.
Solution Approach 2:
The invention applies preliminary action by pre-opening the paper fibers in the adhesive application region before adhesive application. The paper fiber opening element mechanically separates and opens the dense paper fiber structure in advance, creating a receptive substrate for adhesive penetration. This preliminary fiber opening ensures optimal adhesive bonding conditions are created before the adhesive is applied, enhancing adhesive strength without requiring increased grammage.
3Strength
If the paper fiber structure is altered to enhance adhesive penetration, then the adhesive strength is improved, but the paper coherence may be reduced
Solution Approach 1:
The invention applies local quality by restricting fiber structure alteration to specific regions where adhesive application is intended. The blade opens paper fibers only in these localized areas, creating opened fiber structures that enhance adhesive penetration and bonding. The untreated regions maintain their original coherent fiber structure, preserving the overall integrity and stability of the wrapper paper.
Solution Approach 2:
The invention uses partial action by applying the paper fiber opening effect only to the extent necessary for adhesive bonding. The blade opens paper fibers partially and selectively in the adhesive application region, rather than uniformly across the entire wrapper. This partial fiber opening provides sufficient adhesive penetration and bonding strength while minimizing disruption to the overall paper coherence and structural integrity.
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 altered fiber structure increases the surface area and adhesive penetration, resulting in improved adhesive strength and robustness of the wrapper, preventing curling and maintaining the shape of the aerosol-generating article.
Implementation Method 1
a paper fiber opening unit (14) comprising a paper fiber opening element (16). The paper fiber opening element (16) is configured to contact a first surface (11) of the web of paper material (1) to alter the paper fiber structure of the web of paper material (1)
Data Source
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AI summary
The present invention relates to an apparatus (10) for processing a wrapper paper for an aerosol-generating article. The apparatus (10) comprises a supply unit (12) for supplying a web of paper material (1) along a conveying path (100), a paper fiber opening unit (14) comprising at least one paper fiber opening element (16). The at least one paper fiber opening element (16) is configured to contact a first surface (11) of the web of paper material (1) to alter, in particular to irreversibly alter, the paper fiber structure of the web of paper material (1). The apparatus (10) further comprises an adhesive applicator (24) arranged downstream of the paper fiber opening unit (14) in the conveying path (100). The adhesive applicator (24) is configured to apply adhesive on at least one of the first surface (11) and a second surface (13) of the web of paper material (1) to the first surface (11). The present invention further relates to method for processing a paper wrapper for an aerosol-generating article.