Combustible Heat Source Binding Agent for Ash Cohesion
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Solution Overview
Problem
Conventional combustible heat sources for heated smoking articles experience disintegration and deformation due to the combustibility of organic binders, leading to cracking, breakage, and poor ash cohesion during and after burning.
Innovation Solution
A combustible heat source comprising carbon and a binding agent made of a combination of organic polymeric binder material, carboxylate burn salt, and non-combustible sheet silicate material, which improves the integrity and burning properties by retaining structure and reducing deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If an organic binder is used to improve integrity during manufacture and storage, then the heat source maintains structural integrity during handling, but the organic binder combusts during smoking causing disintegration and deformation
Solution Approach 1:
The patent applies composite materials by combining organic binder materials (providing initial structural integrity) with inorganic binder materials (providing thermal stability during combustion). This composite binding agent system allows the heat source to maintain integrity both during manufacture and during smoking, as the inorganic component resists combustion while the organic component provides workability.
2Shape
If an organic binder is used to improve heat source integrity, then the heat source maintains shape during handling, but gases released during burning create pressure leading to cracking and breakage
Solution Approach 1:
The composite binding agent combines organic and inorganic materials to simultaneously maintain shape stability and resistance to cracking. The inorganic component's resistance to combustion prevents gas generation and pressure buildup, while the organic component ensures proper shaping during manufacturing.
Solution Approach 2:
The inorganic binder material acts as an intermediary that mitigates the harmful effects of organic binder combustion. It provides a stable framework that prevents cracking and breakage by resisting the thermal stresses and pressure changes that occur during burning.
3Ease of manufacture
If organic binder material is used, then the heat source can be formed with proper integrity, but the binder disintegrates during smoking leading to poor ash cohesion
Solution Approach 1:
The composite binding agent system provides both ease of manufacture (through the organic component) and ash cohesion (through the inorganic component). The inorganic material remains stable during combustion to bind ash particles together, while the organic material facilitates proper heat source formation during manufacturing.
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 enhances the integrity and mechanical strength of the heat source, reducing deformation and ash fragmentation, while improving burning efficiency and ash cohesion, with a preferred composition of carboxymethyl cellulose, potassium citrate, and clay, resulting in a more cohesive and uniform ash with extended burn lifetime.
Implementation Method 1
the at least one non-combustible inorganic binder material comprises a sheet silicate material
Implementation Method 2
During burning of the organic binder, gases are typically released which create pressure within the heat source
Implementation Method 3
at least one carboxylate burn salt
Data Source
AI summary
A combustible heat source for a smoking article is provided, including carbon and a binding agent. The binding agent includes a combination of three binder components: an organic polymeric binder material, a carboxylate burn salt, and at least one non-combustible inorganic binder material. The at least one non-combustible inorganic binder material includes a sheet silicate material. Preferably, the combustible heat source further includes an ignition aid.