Layered Wet Cleaning Sheet for Controlled Solution Discharge
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Solution Overview
Problem
Conventional wet sheets for cleaning are prone to excessive chemical solution discharge and high frictional resistance, leading to inefficient collection of trash and dust, as they are wet on the surface and require high loads for sliding, causing chemical solution to adhere to the floor surface.
Innovation Solution
A wet sheet with multiple layers, featuring hydrophobic fiber layers on the surface and a hydrophilic fiber layer in between, with interlaced parts of varying densities to control chemical solution discharge and friction resistance, specifically forming highly interlaced areas with a 10-20% area ratio and using polyethylene terephthalate fibers for improved rigidity and reduced capillary action.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wet sheet surface is made wet with chemical solution, then cleaning effectiveness is improved, but frictional resistance increases and excessive solution discharge occurs
Solution Approach 1:
The patent applies local quality by creating highly interlaced parts with different fiber densities in specific regions of the hydrophobic fiber layer. These localized dense regions (occupying 10-20% of the surface area) provide controlled friction and solution discharge properties, while other regions maintain lower friction for sliding. This spatial variation in fiber density allows different areas of the sheet to perform different functions simultaneously.
Solution Approach 2:
The patent changes the physical parameters of the hydrophobic fiber layer by controlling fiber density distribution and interlacing patterns. The highly interlaced parts have specifically controlled fiber densities and interlacing degrees, creating regions with static friction resistance of 300-500 cN. This parameter control optimizes the balance between sliding ease and cleaning effectiveness.
2Stress or pressure
If high load is applied to slide the wet sheet on the floor, then cleaning pressure is improved, but chemical solution is excessively discharged
Solution Approach 1:
The highly interlaced parts with dense fiber arrangement (occupying 10-20% of surface area) act as localized pressure distribution regions. These dense regions provide sufficient cleaning pressure through controlled friction without requiring excessive overall load, thereby preventing excessive chemical solution discharge from the hydrophilic layer.
Solution Approach 2:
The hydrophobic fiber layer with highly interlaced parts serves as an intermediary between the applied load and the chemical solution in the hydrophilic layer. It modulates the transmission of pressure, providing sufficient cleaning force while restricting excessive solution discharge to the floor surface.
3Quantity of substance
If the hydrophobic fiber layer has high fiber density, then solution discharge is controlled, but frictional resistance increases
Solution Approach 1:
Instead of uniform high fiber density throughout the hydrophobic layer, the patent implements localized highly interlaced parts occupying only 10-20% of the surface area. These localized dense regions provide solution discharge control where needed, while the remaining areas maintain lower friction for easy sliding.
Solution Approach 2:
The hydrophobic fiber layer is segmented into functionally distinct regions: highly interlaced parts for solution discharge control and less dense regions for low-friction sliding. This segmentation allows the single layer to simultaneously perform multiple functions that would be contradictory in a uniform structure.
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 effectively reduces chemical solution discharge, prevents the release of collected objects, and enhances the efficiency of collection by optimizing friction resistance and chemical solution viscosity, allowing for a lighter wiping action with reduced initial load requirements.
Implementation Method 1
hydrophobic fiber layers which are each arranged in a front surface layer and a back surface layer... the hydrophobic fiber layers have an interlaced part with a high fiber density
Implementation Method 2
a hydrophilic fiber layer which is arranged in an intermediate layer between the hydrophobic fiber layers... the hydrophilic fiber layer is impregnated with the chemical solution
Implementation Method 3
the interlaced part has, on the front surface layer and the back surface layer, at least one slightly interlaced part and at least one highly interlaced part which is formed in a dent shape and which is interlaced with a fiber density higher than a fiber density of the slightly interlaced part
Data Source
Figure 1
Figure 2A~2C
Figure 3~4
AI summary
This wet sheet for cleaning (1) of the present invention, which is composed of a plurality of layers and impregnated with a chemical solution, is provided with: hydrophobic fiber layers (3) respectively disposed on a front surface layer and a rear surface layer; and a hydrophilic fiber layer (2) disposed on an intermediate layer interposed between the hydrophobic fiber layers (3). The hydrophobic fiber layers (3) have an interlaced part which is interlaced with the hydrophilic fiber layer (2) at a high fiber density. The interlaced part is provided, on the front surface layer and the rear surface layer, with: a low interlaced part (32); and a high interlaced part (32) interlaced at a higher fiber density than the low interlaced part (32), and formed in a concave shape. The high interlaced part (31) is formed to have an area ratio of 10-20% with respect to the area in a plane view of the front surface layer or the rear surface layer. The hydrophilic fiber layer (2) is impregnated with a chemical solution, and the discharge amount of the chemical solution is 0.001-0.0038 g/100 cm2.