Cigarette Paper Salt Coating for Carbon Monoxide Diffusion
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Solution Overview
Problem
Cigarette smoke contains high levels of carbon monoxide, which existing technologies, such as filters and air dilution, fail to effectively reduce due to limitations in diffusion capacity and air permeability of cigarette paper, especially in self-extinguishing cigarettes where fire-retardant strips impede carbon monoxide diffusion.
Innovation Solution
Impregnating or coating cigarette paper with water-soluble salts like sodium hydrogen carbonate, potassium hydrogen carbonate, or ammonium carbonate, which decompose at low temperatures, increasing the paper's diffusion capacity and allowing better carbon monoxide diffusion from the cigarette.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fire-retardant strips are applied to cigarette paper to achieve self-extinguishing, then fire safety is improved, but carbon monoxide diffusion is impeded
Solution Approach 1:
The cigarette paper is divided into different functional zones: fire-retardant strips for self-extinguishing and salt-containing areas for CO diffusion. This segmentation allows each zone to perform its specific function without interfering with the other, resolving the contradiction between fire safety and CO reduction
Solution Approach 2:
Different regions of the cigarette paper have different properties: fire-retardant strips provide flame inhibition while salt-containing regions provide enhanced CO diffusion capacity. This local differentiation allows the paper to simultaneously achieve self-extinguishing and CO reduction by optimizing each region for its specific purpose
2Object-generated harmful factors
If air dilution is used to reduce carbon monoxide content, then carbon monoxide levels are reduced, but taste quality deteriorates
Solution Approach 1:
The invention extracts and removes CO specifically through the salt-containing paper regions while allowing taste-determining substances to pass through unaffected. The salt layers selectively facilitate CO diffusion without diluting the aromatic compounds, thus removing the harmful gas while preserving taste quality
Solution Approach 2:
The water-soluble salts act as intermediaries that selectively facilitate CO diffusion through the paper while allowing other smoke constituents to pass. This intermediary mechanism enables preferential CO removal without the need for bulk air dilution that would compromise taste
3Object-generated harmful factors
If diffusion capacity of cigarette paper is increased to reduce carbon monoxide, then carbon monoxide diffusion is improved, but manufacturing complexity increases
Solution Approach 1:
The invention uses inexpensive water-soluble salts (sodium carbonate, potassium carbonate, ammonium carbonate) that can be easily applied to the paper. These simple, low-cost materials provide the desired CO diffusion enhancement without requiring complex structural modifications or expensive materials
Solution Approach 2:
The invention changes the chemical composition parameter of the cigarette paper by incorporating water-soluble salts, which fundamentally alter the diffusion properties. This parameter change approach achieves enhanced CO diffusion through chemical modification rather than complex structural changes, simplifying the overall design
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 increased diffusion capacity of the cigarette paper significantly reduces carbon monoxide levels in cigarette smoke, often doubling the diffusion capacity during thermal decomposition, thereby improving smoke quality and customer acceptance.
Implementation Method 1
water-soluble salts, which break down at comparatively low temperatures, i.e. significantly less than 450 °C, and thereby loosen the pore structure of the paper on a smoldering cigarette made from it
Implementation Method 2
The diffusion capacity is a transfer coefficient and describes the permeability of the cigarette paper to a gas flow caused by a concentration difference
Data Source
Figure 1
AI summary
The invention relates to cigarette paper, which contains a water-soluble salt, preferably sodium bicarbonate, potassium bicarbonate or ammonium carbonate, as a result of which a high diffusion capacity during thermal decomposition, and thus a reduction in harmful carbon monoxide in the cigarette smoke, is achieved. The invention relates in particular to cigarette paper comprising at least one water-soluble salt which has lost more than 15% of its initial mass after heating to 230°C. The invention further relates to a cigarette produced from the cigarette paper, to a method for producing the cigarette paper and to the use of the water-soluble salt.