Banded Cigarette Wrapper Composition for Low Ignition Printing
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Solution Overview
Problem
Existing smoking articles face challenges in achieving low ignition propensity (IP) and self-extinguishment (SE) characteristics, which are crucial for reducing accidental fires and enhancing consumer satisfaction, while also dealing with issues of paper wrinkling and creasing during printing operations due to the use of aqueous starch solutions.
Innovation Solution
The use of an aqueous starch solution with an anti-wrinkling agent, such as propylene glycol, applied in a patterned wrapper paper to reduce transverse shrinkage and enhance printing precision, coupled with chalk or calcium carbonate to improve IP and SE performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If aqueous starch solution is applied to reduce ignition propensity, then fire safety is improved, but transverse shrinkage and wrinkling occur during printing
Solution Approach 1:
An anti-wrinkling agent is introduced as an intermediary substance mixed with the aqueous starch solution. This agent mediates between the starch solution's fire-retardant properties and the paper's dimensional stability during printing, preventing shrinkage and wrinkling while maintaining the fire safety benefits
Solution Approach 2:
The chemical composition parameters of the aqueous starch solution are modified by adding anti-wrinkling agents. This changes the physical-chemical properties of the solution to reduce its harmful effect on paper dimensional stability while preserving its fire-retardant function
2Object-affected harmful factors
If aqueous starch solution is applied to enhance self-extinguishment, then fire safety is improved, but wrinkles and creases form in the paper
Solution Approach 1:
The anti-wrinkling agent serves as a mediator that protects the paper's physical integrity (smoothness) while allowing the starch solution to perform its fire safety function. The agent interferes with the shrinkage mechanism that would otherwise cause wrinkles and creases
Solution Approach 2:
The solution becomes a composite material combining starch (for fire safety) and anti-wrinkling agent (for dimensional stability). This composite approach allows both fire safety enhancement and paper smoothness to be achieved simultaneously
3Object-affected harmful factors
If aqueous starch solution is applied to reduce ignition propensity, then fire safety is improved, but print registration becomes imprecise
Solution Approach 1:
The anti-wrinkling agent acts as an intermediary that maintains paper dimensional stability during the printing process, ensuring that the paper does not shrink or deform in a way that would compromise print registration accuracy while the starch solution maintains its fire-retardant properties
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 solution effectively reduces paper wrinkling and creasing, allows for precise printing, and enhances the smoking article's ability to maintain a low ignition propensity and self-extinguishment, resulting in improved manufacturing efficiency and consumer satisfaction.
Implementation Method 1
reducing transverse shrinkage
Implementation Method 2
enhancing self-extinguishment characteristics
Data Source
AI summary
Wrapper for cigarette manufacture includes transversely extending band regions applied by a printing technique, such as gravure printing. The band regions comprise starch, an anti-wrinkling agent such as 1,2 propylene glycol or glycerin, and optionally calcium carbonate. Any suitable printing technique can be used to apply the aqueous solution to the banded regions. The pattern of banded regions may be bands, stripes, two-dimensional arrays, undulated regions, and the like along and/or around the tobacco rod. The pattern can be applied in one or more layers. The pattern may be configured so that when a smoking article is placed on a substrate, at least two longitudinal locations along the length of the tobacco rod have film-forming compound located only on sides of the smoking article not in contact with the substrate.