Paper Cigarette Filter Structure for Uniform Holes and Appearance
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Solution Overview
Problem
Cellulose acetate filters are poorly biodegradable and crimped paper filters with irregular holes deteriorate the exterior appearance of smoking articles.
Innovation Solution
A tobacco filter made from a paper sheet with specific bulk, coarseness, and air permeability, using pulp fibers including single and mixed fibers, ensures a regular cross-sectional shape and uniform holes, enhancing biodegradability and appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a crimped paper filter is applied to the mouth end of a smoking article, then biodegradability is improved, but exterior appearance deteriorates due to irregular or uneven holes between the folds
Solution Approach 1:
The patent applies parameter changes by controlling the bulk of the paper sheet within a specific range (1.5 to 3.0 cm³/g) to achieve both uniform hole structure and regular cross-sectional shape. This parameter optimization resolves the contradiction by transforming the paper structure to maintain appearance quality while preserving biodegradability
Solution Approach 2:
The patent uses composite materials by combining pulp fiber and regenerated fiber in a specific weight ratio (pulp fiber: regenerated fiber = 9:1 to 5:5). This composite structure enables the paper sheet to form uniform holes and regular cross-sections when crimped, while maintaining biodegradability from the pulp fiber component
2Reliability
If a paper filter is used as an alternative to cellulose acetate filter, then biodegradability is improved, but exterior appearance deteriorates due to irregular holes between folds
Solution Approach 1:
The patent optimizes the bulk parameter of the paper sheet (1.5 to 3.0 cm³/g) to achieve uniform hole distribution and regular cross-sectional shape when crimped. This parameter control resolves the appearance issue while maintaining the biodegradable nature of the paper filter
Solution Approach 2:
The patent employs a composite fiber structure combining pulp fiber and regenerated fiber in controlled proportions. This composite approach enables the paper to form uniform holes and regular shapes during crimping, eliminating the appearance defects of conventional paper filters while preserving biodegradability
Data Source
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AI summary
Disclosed is a cigarette filter having a beautiful external appearance. According to one aspect, the cigarette filter comprises a paper sheet including pulp fibers, wherein the bulk of the paper sheet is 2 to 4 cm3/g. The pulp fibers include at least one among: single fibers having an average coarseness of 13 mg/100 m or more; and mixed fibers including sub-pulp fibers and regenerated fibers.