Additive-Treated Paper Filter Media for Selective Smoke Filtration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional paper filters in smoking articles cause dry taste, wood taste, astringency, bitterness, and irritation due to their inability to effectively filter out phenols and other smoke components, and they are not biodegradable, leading to environmental issues.
Innovation Solution
A filter element made from a paper containing wood pulp or other plant fibers, treated with a combination of additives such as alkyl ketene dimer, polyalkylene glycol, and amino acids, which reduces the absorption of harsh smoke constituents and improves taste by selectively removing phenols, carbonyls, and hydrogen cyanide.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cellulose acetate filters are used, then filtration performance is good, but cost is high and biodegradation is slow
Solution Approach 1:
The patent changes the material parameters by replacing cellulose acetate with paper containing specific additives (amphiphilic compounds, polyethers, amino acids) that modify the filtration characteristics. This allows paper to achieve filtration performance previously only attainable with cellulose acetate, while maintaining biodegradability
Solution Approach 2:
The patent creates a composite paper material combining traditional paper fibers with specific chemical additives (amphiphilic compounds, polyethers, amino acids). This composite structure enables the paper to selectively filter smoke constituents while maintaining biodegradability, resolving the contradiction between filtration performance and environmental harm
2Ease of manufacture
If paper filters are used, then cost is reduced and biodegradation is fast, but taste quality deteriorates due to astringency and harshness
Solution Approach 1:
The patent introduces intermediary substances (amphiphilic compounds, polyethers, amino acids) that act as mediators between the smoke and the paper filter. These intermediaries selectively bind to harmful constituents (phenols, carbonyls) while allowing desirable flavor components to pass through, thereby improving sensory quality without compromising the cost advantages of paper filters
Solution Approach 2:
The patent modifies the chemical parameters of paper by incorporating specific additives that change its interaction with smoke constituents. This transforms paper from a material that causes harshness to one that provides smooth filtration, maintaining cost-effectiveness while improving taste quality
3Ease of manufacture
If standard paper filters are used, then manufacturing is simple, but filtration selectivity is insufficient leading to dry taste
Solution Approach 1:
The patent changes the chemical parameters of paper by incorporating specific additives (amphiphilic compounds, polyethers, amino acids) that enhance filtration selectivity. These additives enable the paper to selectively remove specific smoke constituents (phenols, carbonyls) while maintaining manufacturing simplicity
Solution Approach 2:
The patent creates a composite paper material that combines traditional paper with functional additives. This composite structure maintains the manufacturing simplicity of paper while achieving the filtration selectivity previously only possible with complex materials like cellulose acetate
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 treated paper filters significantly reduce dry and paper tastes, irritation, and harshness, producing cleaner, sweeter, and smoother smoke while maintaining tar and nicotine delivery, and exhibits improved biodegradability and machinability.
Implementation Method 1
A filter element comprising a paper base web treated with a combination of additives, including an amphiphilic compound, a polyether, and optionally an amino acid, to synergistically reduce harsh, bitter, and dry tastes, and improve smoke filtration by selectively removing phenols and carbonyls
Implementation Method 2
The treated paper filters effectively remove up to 70% of phenols, 60% of crotonaldehyde, and 80% of formaldehyde, resulting in cleaner, sweeter, and smoother mainstream smoke
Data Source
AI summary
A filter element is disclosed made from a gathered paper web that may be crimped, embossed, and/or corrugated. In accordance with the present disclosure, the paper web is treated with at least two different additives. The first additive comprises amphiphilic molecules, having hydrophilic and hydrophobic ends such as a ketene dimer that has one or more branching groups. The second additive, on the other hand, may comprise a polymer component such as a polyalkylene glycol. The filter element may also be treated with a polyamine or an amino acid or salt thereof. In one embodiment, the filter element may be incorporated into the filter of a smoking article. The two additives together may improve smoke taste, reduce some smoke phenols, and reduce some smoke carbonyls.