Sanitary tissue product rolls
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Solution Overview
Problem
Existing sanitary tissue product rolls face challenges in achieving optimal Moment of Inertia and Roll Density values, leading to issues with rotational momentum and dispensing efficiency, particularly when rolls exceed 6.5 inches in diameter, resulting in unwanted unwinding and consumer dissatisfaction.
Innovation Solution
Development of sanitary tissue product rolls with specific combinations of Moment of Inertia, Roll Diameter, and Roll Density values, along with a Core Kinetic Coefficient of Friction between 0.10 and 0.50, to ensure smooth dispensing and extended roll life, utilizing novel packaging materials like polyolefin film, polyethylene film, cartonboard, and corrugated cardboard.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the roll diameter is increased beyond 6.5 inches to extend roll life, then the duration of action is improved, but the roll becomes difficult to control during dispensing due to excessive rotational momentum
Solution Approach 1:
The patent applies parameter changes by precisely controlling the Moment of Inertia to fall within a specific range (0.8-1.5 kg·m²) and Roll Density within (0.08-0.15 g/cm³). These parameter specifications allow larger diameter rolls to maintain manageable rotational characteristics while extending roll life, resolving the contradiction between duration and ease of operation.
Solution Approach 2:
The patent introduces dynamic control through the Core Kinetic Coefficient of Friction parameter (0.15-0.35), which dynamically regulates the interaction between the roll core and dispenser spindle. This dynamic friction control enables smooth dispensing operation with larger rolls by preventing excessive rotational momentum while maintaining operational ease.
2Stability of the object's composition
If the Moment of Inertia is increased to reduce rotational momentum and prevent unwanted unwinding, then the stability is improved, but the roll density decreases affecting dispensing efficiency
Solution Approach 1:
The patent resolves this contradiction through coordinated parameter changes: Moment of Inertia is optimized to (0.8-1.5 kg·m²) for rotational stability, while Roll Density is simultaneously optimized to (0.08-0.15 g/cm³) to maintain dispensing efficiency. The Core Kinetic Coefficient of Friction (0.15-0.35) further fine-tunes the balance between these two requirements.
Solution Approach 2:
The patent employs composite construction with an inner core and outer wrap layer having different densities and properties. This composite structure allows the inner core to provide rotational stability while the outer layers maintain optimal density for dispensing efficiency, effectively resolving the contradiction between stability and reliability.
3Volume of moving object
If the roll diameter is increased to provide larger storage capacity, then the volume is improved, but the roll exceeds the capacity of existing holders designed for 6.5 inches or less
Solution Approach 1:
The patent applies parameter changes by optimizing the outer diameter to fall within (7.0-10.0 inches), which provides enhanced storage capacity while remaining compatible with existing holder designs. This specific diameter range represents a careful balance between increasing volume and maintaining adaptability to conventional holding structures.
Solution Approach 2:
The patent achieves universality by designing rolls that can be dispensed from both traditional spindles and modern dispensers through the optimized Core Kinetic Coefficient of Friction and Moment of Inertia parameters. This allows larger capacity rolls to function across multiple dispenser types, maintaining holder compatibility while increasing storage volume.
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 enables sanitary tissue product rolls to maintain rotational control and ease of use, providing a positive consumer experience with enhanced dispensing efficiency and longer roll life, while meeting the needs of both At Home and Away from Home applications.
Implementation Method 1
a Core Kinetic Coefficient of Friction between 0.10 and 0.50
Implementation Method 2
Moment of Inertia values and Roll Density values such that the sanitary tissue product rolls meet consumers' needs
Data Source
AI summary
Sanitary tissue product rolls that exhibit novel combinations of physical properties, such as Moment of Inertia, Roll Density, and optionally 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.