Cigarette Wrapper Catalyst Pattern for Smoke Reduction
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Solution Overview
Problem
Current methods for reducing carbon monoxide, nitric oxide, and particulate matter in cigarette smoke are not sufficiently effective, and there is a need for improved compositions and methods to achieve this reduction.
Innovation Solution
A smoking article wrapper with a patterned deposit of catalyst particles, such as nanoscale iron oxide, is used to catalyze and oxidize gas constituents in the smoke, reducing the concentration of carbon monoxide, nitric oxide, and particulate matter by forming a sheet of cigarette paper with catalyst particles deposited on its surface without a binder, using techniques like gravure printing or spraying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If catalyst particles are deposited on the wrapper surface, then the concentration of carbon monoxide, nitric oxide and particulate matter in smoke is reduced, but the manufacturing process becomes more complex
Solution Approach 1:
The catalyst particles are deposited on the wrapper surface before the wrapper is assembled into the smoking article. This preliminary action allows the catalyst to be pre-positioned and ready to function immediately when smoke contacts the wrapper, eliminating the need for complex in-situ catalyst deployment mechanisms during or after assembly.
Solution Approach 2:
The wrapper acts as an intermediary carrier that delivers the catalyst particles to the smoke stream. By depositing catalyst on the wrapper surface, the system uses the existing wrapper structure as a mediator to transport and present the catalytic material to the smoke, simplifying the overall system architecture compared to direct catalyst integration with the tobacco or filter.
2Ease of manufacture
If catalyst particles are deposited without using a binder, then the catalyst can be applied more simply, but the deposit may not adhere as strongly to the wrapper
Solution Approach 1:
The catalyst deposit is applied without a binder, accepting that the deposit may not be permanently permanent but will suffice for the intended duration of the smoking article's use. This approach prioritizes manufacturing simplicity and cost-effectiveness over long-term durability, as the catalyst only needs to function during the smoking process rather than requiring permanent attachment.
Solution Approach 2:
The catalyst particles are deposited in a form that allows them to self-adhere to the wrapper surface through their own properties rather than requiring an external binder material. The particles utilize the wrapper surface characteristics and deposition conditions to achieve sufficient adhesion without additional binding agents, simplifying the manufacturing process.
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 patterned deposit of catalyst particles effectively reduces the concentration of carbon monoxide, nitric oxide, and total particulate matter in mainstream and sidestream smoke by at least 10% to 95%, enhancing the safety and health aspects of smoking articles.
Implementation Method 1
the patterned deposit comprises catalyst particles capable of catalyzing, oxidizing and/or reducing a constituent gas component in the mainstream and/or sidestream smoke
Implementation Method 2
the patterned deposit comprises catalyst particles capable of catalyzing, oxidizing and/or reducing a constituent gas component
Data Source
AI summary
A wrapper for a smoking article includes a web; and a patterned deposit on at least a portion of one surface of the wrapper, wherein the patterned deposit comprises catalyst particles. The patterned deposit can include a nanoparticle catalyst that is capable of catalyzing the conversion of a constituent gas component in the mainstream and/or sidestream smoke of the smoking article. The constituent gas component can be carbon monoxide and/or nitric oxide and the catalyst particles can be iron oxide. Also provided is a smoking article comprising a tobacco rod having a wrapper formed around the tobacco rod, the wrapper including a patterned deposit on at least a portion of one surface of the wrapper. A method of making the wrapper and a method of making a smoking article utilizing the wrapper are also provided.