Embossed Toilet Tissue Structure Balancing Burst and Tensile
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Solution Overview
Problem
Existing fibrous structures do not meet consumer demands for a Dry Burst of greater than 270 g and/or a Total Dry Tensile of less than 2375 g/76.2 mm and/or a Geometric Mean Total Dry Tensile of less than 1130 g/76.2 mm as measured by the Dry Burst and Tensile Strength Test Methods.
Innovation Solution
Development of embossed fibrous structures that exhibit a Dry Burst of greater than 270 g and/or greater than 280 g, with Total Dry Tensile of less than 2375 g/76.2 mm and/or Geometric Mean Total Dry Tensile of less than 1130 g/76.2 mm, achieved through the use of specific manufacturing processes and materials such as cellulosic pulp fibers, polypropylene filaments, and embossments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional fibrous structures are used, then manufacturing simplicity is maintained, but Dry Burst performance is insufficient (not greater than 270 g)
Solution Approach 1:
The patent employs composite fibrous structures combining different fiber types (cellulosic fibers, synthetic fibers) with specific length distributions and fineness values. This composite approach enables achieving Dry Burst greater than 270 g while maintaining manufacturing feasibility through established papermaking processes.
Solution Approach 2:
The invention systematically adjusts critical parameters including fiber length distribution (mix of short and long fibers), fineness value ranges, basis weight, and embossing patterns. These parameter optimizations enable high Dry Burst performance through controlled fiber arrangement and bonding characteristics without requiring fundamentally new manufacturing equipment.
2Reliability
If fibrous structures with high Dry Burst are created, then consumer satisfaction is improved, but Total Dry Tensile strength becomes too high (exceeding 2375 g/76.2 mm)
Solution Approach 1:
The patent applies embossing patterns that create localized variations in fiber density and bonding. These embossed regions with reduced bonding strength provide areas that burst more easily (increasing Dry Burst) while the overall structure maintains sufficient tensile strength through the interconnected fiber network.
Solution Approach 2:
The fibrous structure incorporates a distribution of fiber lengths where shorter fibers create bonding points that facilitate bursting, while longer fibers provide tensile strength. This segmentation of fiber functions enables simultaneous optimization of both Dry Burst and tensile properties within the specified ranges.
Data Source
AI summary
Embossed fibrous structures that exhibit a Dry Burst of greater than 270 g as measured according to the Dry Burst Test Method and more particularly to embossed fibrous structures that exhibit a Dry Burst of greater than 270 g as measured according to the Dry Burst Test Method and a Total Dry Tensile of less than 2375 g/76.2 mm and/or a Geometric Mean Total Dry Tensile of less than 1130 g/76.2 mm as measured according to the Tensile Strength Test Method are provided.