Sanitary Tissue Product Rolls
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Solution Overview
Problem
Existing sanitary tissue product rolls face challenges in achieving diameters greater than 6.5 inches without stability issues and in meeting specific Moment of Inertia and Roll Density requirements, leading to problems with dispensing and rotational momentum control.
Innovation Solution
Development of sanitary tissue product rolls with diameters greater than 8.25 inches, Moment of Inertia values greater than 1.50 g*m^2, and Roll Density values less than 2.50 g/cm^3, along with a Core Kinetic Coefficient of Friction between 0.10 and 0.50, utilizing novel web structures and packaging methods such as film overwraps, bags, and cartonboards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the roll diameter is increased to provide larger rolls, then the quantity of tissue per roll increases, but the roll becomes unstable and difficult to control during dispensing
Solution Approach 1:
The patent applies parameter changes by precisely controlling roll density (0.05-0.20 g/cm³), moment of inertia (1.5-10.0 g*m²), and diameter (6.5-8.25 inches) to achieve optimal dispensing characteristics. By adjusting these physical parameters, the patent resolves the contradiction between providing larger rolls with more tissue while maintaining roll stability and controllability during dispensing operations.
2Quantity of substance
If the roll diameter is increased beyond 6.5 inches, then more tissue can be stored in each roll, but existing toilet tissue holders cannot accommodate these larger rolls
Solution Approach 1:
The patent utilizes parameter changes by optimizing the roll diameter to 6.5-8.25 inches, which exceeds traditional sizes to increase tissue capacity while carefully controlling other parameters like moment of inertia and density to ensure the rolls can be accommodated by existing holder designs with minimal modifications.
3Weight of moving object
If the roll density is decreased to reduce weight, then the roll is easier to handle, but the Moment of Inertia decreases making rotational control difficult
Solution Approach 1:
The patent applies parameter changes by simultaneously optimizing roll density (0.05-0.20 g/cm³) and moment of inertia (1.5-10.0 g*m²) within specific ranges. This multi-parameter optimization resolves the contradiction between reducing roll weight for easier handling and maintaining sufficient moment of inertia for stable rotational control during dispensing.
Data Source
AI summary
Sanitary tissue product rolls that exhibit novel combinations of physical properties, such as Moment of Inertia, Roll Density, and Roll Diameter, such that the sanitary tissue product rolls meet consumers’ needs, and method for making such novel sanitary tissue product rolls and marketing such novel sanitary tissue product rolls are provided.