Absorbent Sheet Embossing Pattern for Higher Absorption and Strength
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Solution Overview
Problem
Existing absorbent sheets, particularly those used for domestic or industrial wiping applications, face limitations in absorption capacity and strength due to conventional embossing patterns, which do not optimize the distribution of protrusions for enhanced performance.
Innovation Solution
The absorbent sheet incorporates a unique embossing pattern with protrusions distributed in concentric circles or spirals, aligned symmetrically around the geometric center, combined with adhesive bonding or mechanical connections, to improve absorption and strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional embossing patterns with uniform distribution of protrusions are used, then the manufacturing process is simple, but the absorption capacity and tensile strength are limited
Solution Approach 1:
The patent applies local quality by creating regions with different protrusion densities and arrangements. The embossing pattern includes areas with higher protrusion density for enhanced absorption and areas with specific geometric arrangements for improved tensile strength, rather than using a uniform distribution throughout the entire sheet.
Solution Approach 2:
The patent employs asymmetry by using non-uniform distribution of protrusions, including spiral patterns and varying densities in different zones. This asymmetric arrangement optimizes both absorption capacity and mechanical strength, breaking away from conventional uniform patterns.
2Ease of manufacture
If conventional embossing patterns with uniform distribution of protrusions are used, then the manufacturing process is simple, but the tensile strength is limited
Solution Approach 1:
The patent incorporates curved and spiral patterns in the embossing design, using curved lines and circular arrangements of protrusions. These curved patterns distribute mechanical stress more effectively across the sheet, enhancing tensile strength compared to straight-line conventional patterns.
Solution Approach 2:
The patent applies local quality by creating regions with different protrusion densities and arrangements. The embossing pattern includes areas with higher protrusion density for enhanced absorption and areas with specific geometric arrangements for improved tensile strength, rather than using a uniform distribution throughout the entire sheet.
3Quantity of substance
If multi-layer sheets are created to increase absorption capacity, then the absorption capacity is improved, but the structure becomes more complex
Solution Approach 1:
The patent applies segmentation by dividing the sheet into multiple plies with distinct embossing patterns. Each ply can be independently manufactured and then bonded together, allowing for optimized absorption in each layer while maintaining manufacturing simplicity through modular construction.
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
This arrangement significantly enhances the absorption capacity and tensile strength of the sheets, offering superior performance and a novel aesthetic appeal compared to traditional designs.
Implementation Method 1
The ability of this material to stretch, which ability is conferred upon it by the creping operation, is put to good use for embossing it. The absorbent paper may be of the TAD (Through Air Dried) or alternatively of the CWP (Conventional Wet Pressed) type
Implementation Method 2
adhesive is applied to the tops of the protrusions of one of the plies and the plies are positioned in such a way that the faces exhibiting the protrusions face each other
Data Source
AI summary
A cut or precut absorbent sheet intended in particular for wiping, includes at least two plies or groups of plies of creped absorbent paper with a basis weight ranging between 12 and 35 g/m2 per ply, at least one of the plies having an embossed pattern made up of protrusions directed towards the inside of the sheet and forming cavities between them. Some of the protrusions are distributed over at least one of the plies in such a way as to define portions of curves which in particular form concentric circles around or near the geometric center of the outline of the sheet; and the set of protrusions belonging to one ply of the sheet forms alignments which constitute an embossed pattern with central symmetry with respect to the geometric center of the outline of the sheet.