Two-Layer Cigarette Paper Structure for Spotting Prevention
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Solution Overview
Problem
Tobacco products often develop spots due to liquid permeation through the pouch or cigarette paper, affecting the perceived quality, and existing solutions do not adequately address the influence of air permeability on this issue.
Innovation Solution
A two-layered pouch or cigarette paper structure is implemented, where the outer layer has higher air permeability than the inner layer, utilizing larger pore sizes to reduce liquid penetration and capillary force, thereby preventing spots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the pore size of the inside cigarette paper is larger, then the capillary force is reduced, but the spotting component penetrates more easily through the paper
Solution Approach 1:
The single cigarette paper is divided into two layers: an inside layer with smaller pore size to provide high capillary force and absorb liquid, and an outside layer with larger pore size to reduce capillary force and prevent spotting. This segmentation allows each layer to perform its specific function optimally.
Solution Approach 2:
Different regions (layers) of the cigarette paper structure are given different properties. The inside layer has small pore size for liquid absorption, while the outside layer has large pore size for spotting prevention. This local differentiation of properties resolves the contradiction between capillary force and spotting prevention.
2Object-affected harmful factors
If a single layer of cigarette paper with large pore size is used, then the capillary force is reduced, but liquid penetration occurs more readily
Solution Approach 1:
The cigarette paper is segmented into two functional layers: the inside layer with small pores provides liquid barrier performance through high capillary action, while the outside layer with large pores reduces capillary force to prevent spotting. Together they resolve the contradiction between reducing capillary force and maintaining liquid barrier performance.
Solution Approach 2:
The invention uses a composite structure of two different paper layers with contrasting pore size characteristics. The combination of small-pore inside layer and large-pore outside layer creates a composite material system that achieves both liquid barrier performance and reduced spotting.
3Ease of operation
If the air permeability of the outside cigarette paper is increased, then the air flow is improved, but the spotting prevention effect is reduced
Solution Approach 1:
The outside layer is specifically designed with large pore size to provide high air permeability for improved air flow, while the inside layer with small pores maintains spotting prevention. This local quality differentiation allows the outside layer to optimize air flow without compromising spotting prevention.
Solution Approach 2:
The dual-layer structure segments the functions: the outside layer handles air flow requirements with large pores, while the inside layer handles spotting prevention with small pores. This segmentation resolves the contradiction between air permeability and spotting prevention.
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 two-layered structure effectively minimizes spot occurrence by controlling pore size and capillary force, ensuring the pouch or cigarette paper remains less wet and reducing the penetration of liquid, thus enhancing the appearance quality of tobacco products.
Implementation Method 1
Permeation of a spotting component into the pouch or the cigarette paper is a phenomenon caused by capillary force. The capillary force is reduced as the pore size of the paper is larger
Implementation Method 2
a permeation distance becomes longer as the pore size of the paper is smaller
Data Source
AI summary
A tobacco product produced by wrapping cut tobacco with a pouch or a cigarette paper, wherein the pouch or the cigarette paper has an inner layer and an outer layer, and a paper of the outer layer has an air permeability higher than that of a paper of the inner layer.