Nested Embossed Tissue Paper to Prevent Oil Backstaining and Collapse
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Solution Overview
Problem
Conventional hygienic thin-leaf papers face issues with reduced strength and absorption performance when loaded, as the non-embossed spaces collapse, leading to oil backstaining and decreased designability due to the collapse of embossed spaces under load.
Innovation Solution
A hygienic thin-leaf paper design featuring sheets with embossed and non-embossed portions arranged in a nested configuration, where the non-embossed portions do not intersect, enhancing the dispersion of oil and maintaining designability while reducing the thickness and basis weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If non-embossed spaces are formed to improve oil absorption performance, then absorption performance is improved, but strength in the thickness direction is reduced and the paper becomes more prone to collapse under load
Solution Approach 1:
The patent applies nesting by arranging embossed protrusions of one sheet within the non-embossed spaces of another sheet in a laminated structure. This nested configuration allows oil to be absorbed and retained in the non-embossed spaces while the embossed protrusions provide structural support, preventing collapse under load and maintaining both absorption performance and strength.
Solution Approach 2:
The patent creates a composite structure by laminating multiple sheets with different embossed patterns. The combination of sheets with embossed protrusions and non-embossed spaces forms a composite material system where the embossed protrusions reinforce the structure while the non-embossed spaces provide oil absorption capacity, resolving the contradiction between strength and absorption.
2Quantity of substance
If embossed spaces are formed to retain absorbed oil, then oil retention is improved, but the embossed spaces collapse when load is applied during use
Solution Approach 1:
The nested arrangement of embossed protrusions within non-embossed spaces of adjacent sheets creates a stable three-dimensional structure. The embossed protrusions act as structural supports that prevent the collapse of embossed spaces under load, while still allowing these spaces to retain absorbed oil, thus maintaining both oil retention and structural stability.
3Quantity of substance
If conventional laminated structures are used to provide absorption capability, then oil absorption is achieved, but oil backstaining occurs on the backside of the paper
Solution Approach 1:
The nested configuration of embossed protrusions and non-embossed spaces creates a three-dimensional absorption network that traps oil within the internal structure. This prevents oil from penetrating through to the backside of the paper, eliminating backstaining while maintaining effective oil absorption capability.
4Quantity of substance
If non-embossed portions are increased to improve oil dispersion, then absorption performance is enhanced, but designability is reduced
Solution Approach 1:
The patent applies local quality by creating specific non-embossed portions with defined shapes and distributions rather than uniformly increasing non-embossed areas. This allows oil dispersion to be enhanced in specific regions while maintaining embossed patterns in other areas for designability, achieving both oil dispersion and aesthetic requirements through localized structural variations.
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 provides improved absorption performance during loading by preventing oil backstaining and maintaining designability, while reducing the thickness and basis weight of the paper.
Implementation Method 1
Each sheet of the conventional hygienic thin-leaf paper may be provided with embossing work to form a protrusion (hereinafter, referred to as an embossed protrusion) on one surface and a recess (hereinafter, referred to as an embossed recess) corresponding to the embossed protrusion on the other surface in order to give a capability of absorbing oil and moisture.
Data Source
Figure 1
Figure 2(A)~2(B)
Figure 3(A)~3(C)
AI summary
A hygienic thin-leaf paper including a first sheet having front and back surfaces, on which embossed protrusions and embossed recesses corresponding to the embossed protrusions are respectively formed; and a second sheet having front and back surfaces, on which embossed protrusions and embossed recesses corresponding to the embossed protrusions are espectively formed, wherein the first sheet and the second sheet are integrated by facing the surfaces formed with the embossed protrusions in a nested form, wherein each of the first sheet and the second sheet have an embossed portion, on which the embossed protrusions and non-embossed-protrusion portions are formed, wherein at least one of the first sheet and the second sheets have a non-embossed portion, on which the embossed protrusions and the non-embossed portions are not formed, and wherein the non-embossed portion is in a shape without having an intersection.