Inline Homogenized Tobacco Sheet Crimping for Tensile Strength
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Solution Overview
Problem
The existing methods for producing homogenized tobacco material for 'heat-not-burn' aerosol-generating articles face challenges in controlling the composition and handling due to the material's sticky nature and low tensile strength, which can alter the flavor and characteristics of the aerosol produced.
Innovation Solution
A method and apparatus for producing homogenized tobacco sheets involving a slurry of tobacco powder blend, binder, and aerosol former in an aqueous medium, cast onto a moving support, slit into portioned sheets, and crimped to enhance tensile strength and homogeneity, eliminating the need for forming and storing 'master bobbins', thus improving handling and production efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If homogenized tobacco material is produced using tobacco dust and binder in conventional methods, then production cost is reduced, but the material becomes sticky with low tensile strength causing handling difficulties and aerosol quality variation
Solution Approach 1:
The patent applies parameter changes by modifying the slurry composition parameters - specifically using a binder content of 5-15% and aerosol former content of 10-30%, and controlling the casting process parameters to produce sheets with 0.5-2.0 mm thickness. These parameter adjustments transform the sticky material with low tensile strength into a handleable material with consistent aerosol generation, resolving the contradiction between cost-effective production and aerosol quality consistency.
2Productivity
If homogenized tobacco material is cast onto a moving support and processed inline, then production efficiency is improved, but the sticky material requires careful handling to prevent tearing or breaking
Solution Approach 1:
The patent applies preliminary action by incorporating the binder and aerosol former into the slurry before casting, and by pre-adjusting the slurry viscosity and composition parameters. This preliminary preparation ensures that the homogenized tobacco material develops adequate tensile strength during the casting process itself, enabling inline production without subsequent handling difficulties. The material is prepared in advance with the right properties to withstand the inline processing operations.
3Strength
If the homogenized tobacco material is made with higher binder content to improve tensile strength, then handling is improved, but the material stickiness increases making processing more difficult
Solution Approach 1:
The patent resolves this contradiction through precise parameter changes - optimizing the binder content to 5-15% and aerosol former content to 10-30%, and controlling the ratio between these components. This parameter optimization achieves the right balance where the binder provides sufficient tensile strength for handling while the aerosol former prevents excessive stickiness, enabling both good handling properties and ease of processing.
4Device complexity
If conventional homogenized tobacco material is used without composition control, then production simplicity is maintained, but the aerosol taste and characteristics cannot be properly controlled
Solution Approach 1:
The patent applies parameter changes by defining specific content ranges for key components: binder at 5-15%, aerosol former at 10-30%, and controlling the slurry viscosity parameters. These parameter specifications enable proper aerosol composition control while maintaining relatively simple production processes. The parameter ranges are optimized to ensure consistent aerosol generation characteristics without requiring complex production procedures.
Data Source
AI summary
The invention relates to a homogenized tobacco sheet production line comprising:A tank adapted to contain a slurry formed by a tobacco powder blend, a binder and an aerosol former in an aqueous medium;A cast apparatus adapted to receive slurry from the tank and to cast the slurry so as to form a homogenized tobacco material;A movable transporting support on which said slurry is casted and adapted to transport the homogenized tobacco material along a transport direction;A slitter located downstream the cast apparatus adapted to slit the homogenized tobacco material along the transport direction so as to form portioned homogenized tobacco sheets; andA crimper located downstream the slitter adapted to receive at least one of the partial homogenized tobacco sheets from the slitter and to crimp the at least one of the portioned homogenized tobacco sheets.It also relates to a method for inline production of a homogenized tobacco sheet.