Kitchen paper roll and kitchen paper
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Solution Overview
Problem
Existing kitchen paper rolls face challenges in maintaining absorbency and softness when the winding length is increased, as higher winding density leads to flattening and reduced capacity for absorbing liquids, and lower bulk results in hardness and handling difficulties.
Innovation Solution
The kitchen paper is formed by joining two sheets in a nested manner with embossed regions, featuring embossed protrusions with specific densities and ratios, which maintain absorbency and softness by preventing flattening and ensuring adequate space for liquid absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the winding length of the kitchen paper is increased, then the winding diameter increases, but this reduces storability and stockability
Solution Approach 1:
The kitchen paper is formed by joining two sheets in a nested manner, where one sheet is inserted into the other. This nesting structure allows the paper to be wound more compactly, increasing winding length while controlling winding diameter. The nested configuration enables the sheets to interlock and occupy space more efficiently within the rolled structure.
2Length of moving object
If the winding density of the kitchen paper is increased to increase winding length, then the winding diameter is controlled, but the kitchen paper becomes flattened and absorbency decreases
Solution Approach 1:
Each sheet includes an embossed region with embossed protrusions that create localized three-dimensional structures. These embossed regions are distributed across the sheet surface, providing local volume and space for liquid absorption. The embossed protrusions maintain paper fluffiness and absorbency even when the overall winding density is increased, as each local region retains its capacity to hold liquid.
3Length of moving object
If the bulk of the kitchen paper is decreased to increase winding length, then the winding diameter is controlled, but the kitchen paper becomes hard and difficult to handle
Solution Approach 1:
The embossed regions with protrusions create localized volumetric structures that maintain paper softness and flexibility. Even when overall bulk is reduced for compact winding, these distributed embossed regions throughout the sheet provide local cushioning and prevent the paper from becoming uniformly hard. The nested joining of two sheets further enhances flexibility while maintaining compact form.
4Length of moving object
If the winding length of the kitchen paper is increased, then more paper is available for use, but the capacity for absorbing water or oil decreases
Solution Approach 1:
The embossed protrusions in each sheet create numerous small cavities and spaces throughout the paper structure. These localized voids act as reservoirs for liquid absorption. When two sheets are joined in a nested manner, the combined effect multiplies these absorption sites, increasing total absorption capacity per unit length of wound paper.
Solution Approach 2:
The nested joining of two sheets creates an interlocking structure where the embossed regions of one sheet complement those of the other. This nesting arrangement maximizes the utilization of available space for liquid storage, allowing the paper to absorb and retain more liquid within the compact wound structure.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A kitchen paper roll includes a kitchen paper that is formed by joining two sheets in a nested manner and is wound to form the kitchen paper roll. Each of the sheets includes an embossed region. The density of embossed protrusions on each of the sheets is greater than or equal to 0.075/mm2 and less than or equal to 0.2/mm2, the winding density of the kitchen paper is greater than or equal to 0.12 m/cm2 and less than or equal to 0.27 m/cm2, and the ratio of a minimum embossment area to a maximum embossment area in the kitchen paper is greater than or equal to 0.51.