Hygienic thin-leaf paper

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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.

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 paper's strength and absorption capabilities while maintaining designability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If non-embossed spaces are formed to improve oil absorption performance, then absorption capability is improved, but strength in the thickness direction is reduced and the non-embossed spaces collapse under load

Engineering Contradiction:

Improveoil absorption capabilityVSAvoidstrength in thickness direction

Core Design Contradiction:

Quantity of substanceVSStrength

Solution Approach 1:

The paper sheet is divided into multiple embossed portions and non-embossed portions, creating a segmented structure where embossed portions provide strength while non-embossed portions provide absorption capability. This segmentation allows both functions to coexist without mutual interference.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the paper sheet are given different properties: embossed portions have higher strength and lower absorption, while non-embossed portions have lower strength and higher absorption. This local differentiation optimizes the overall performance by placing each type of portion where it is most needed.

Inventive Principle:

Principle #3Local quality

2Quantity of substance

If non-embossed spaces are formed to improve oil dispersion, then absorption performance is improved, but designability is reduced

Engineering Contradiction:

Improveoil dispersion capabilityVSAvoiddesignability

Core Design Contradiction:

Quantity of substanceVSAdaptability or versatility

Solution Approach 1:

The embossed portions are given asymmetric patterns with varying shapes, sizes, and arrangements, which simultaneously provides structural strength and aesthetic design value. The asymmetric design prevents monotony while maintaining functional performance.

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

The embossed patterns are created by copying impressions from embossing rollers or molds, allowing for complex designs to be efficiently reproduced across the entire paper sheet surface, thereby maintaining designability while ensuring consistent functional performance.

Inventive Principle:

Principle #26Copying

3Strength

If embossed portions are increased to improve strength, then strength is improved, but oil absorption capability is reduced

Engineering Contradiction:

Improvestrength in thickness directionVSAvoidoil absorption capability

Core Design Contradiction:

StrengthVSQuantity of substance

Solution Approach 1:

Instead of making the entire paper sheet embossed, only specific portions are embossed while leaving other portions non-embossed. This partial action approach provides sufficient strength through the embossed regions while preserving absorption capability in the non-embossed regions, avoiding the excessive embossing that would eliminate absorption function.

Inventive Principle:

Principle #16Partial or excessive action

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 nested configuration improves absorption performance during loading by preventing oil backstaining and maintaining designability, even under load, by ensuring non-embossed spaces do not collapse and oil dispersion is maintained.

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.

Methodology Applied

Scientific EffectCapillary action: Capillary Action

Implementation Method 2

the oil absorbed in the embossed space is retained

Methodology Applied

Scientific EffectSurface tension: Surface Tension

Data Source

PatentUS11253129B2Hygienic thin-leaf paper

Publication Date: 2022.02.22 DAIO PAPER CORP

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 respectively 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.