Embossed Cleaning Sheet Structure for Shape Retention and Dust Pickup

Solution Overview

Problem

Conventional cleaning sheets with low-density areas for reduced friction and improved dust collection often suffer from shape collapse and degraded performance due to reduced strength.

Innovation Solution

A cleaning sheet with an embossed structure featuring outer fiber layers and an inner fiber layer, where fibers are entangled at boundaries, providing enhanced shape retention and dust collection performance through alternating raised and sunken embosses.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If low-density areas are provided in the sheet fiber to reduce friction and improve dust collection, then dust collecting performance is improved, but sheet strength falls and the raised and sunken shapes are likely to collapse

Engineering Contradiction:

Improvedust collecting performanceVSAvoidsheet strength

Core Design Contradiction:

ProductivityVSStrength

Solution Approach 1:

The sheet is divided into multiple fiber layers (first fiber layer, second fiber layer, third fiber layer) with distinct functions. The first and second layers provide structural strength while the third layer provides the low-density dust collecting surface. This segmentation allows each layer to optimize for its specific function without compromising overall sheet integrity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention uses a composite structure of multiple fiber layers with different densities and properties. The first fiber layer has higher density for strength, the third fiber layer has lower density for dust collection. This composite approach combines the advantages of both high-density (strength) and low-density (dust collection) regions in a single sheet structure.

Inventive Principle:

Principle #40Composite materials

2Productivity

If low-density areas are provided in the sheet fiber to reduce friction and improve dust collection, then dust collecting performance is improved, but the raised and sunken shapes are likely to collapse

Engineering Contradiction:

Improvedust collecting performanceVSAvoidshape retention of raised and sunken shapes

Core Design Contradiction:

ProductivityVSShape

Solution Approach 1:

The sheet is divided into multiple fiber layers (first fiber layer, second fiber layer, third fiber layer) with distinct functions. The first and second layers provide structural strength while the third layer provides the low-density dust collecting surface. This segmentation allows each layer to optimize for its specific function without compromising overall sheet integrity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention uses a composite structure of multiple fiber layers with different densities and properties. The first fiber layer has higher density for strength, the third fiber layer has lower density for dust collection. This composite approach combines the advantages of both high-density (strength) and low-density (dust collection) regions in a single sheet structure.

Inventive Principle:

Principle #40Composite materials

Data Source

PatentEP3639720B1Cleaning sheet

Publication Date: 2023.05.03 DAIO PAPER CORP

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AI summary

This cleaning sheet (100) is provided with an embossed part in which the sheet is compressed in the thickness direction. The cleaning sheet (100) is provided with: outer layers (11), (11) forming the surfaces of the sheet; and an inner layer (12) sandwiched between the outer layers (11), (11). In the boundary areas between the outer layers (11), (11) and the inner layer (12), the fibers of the layers are entangled. This allows for a sheet that better retains the raised and sunken shapes embossed therethrough and exhibits excellent collecting performance.