Wet sheet for cleaning
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Solution Overview
Problem
Conventional wet sheets for cleaning with hydrophilic and hydrophobic fiber layers impregnated with chemical solutions experience excessive chemical solution discharge and high frictional resistance, leading to inefficient collection of trash and dust.
Innovation Solution
A wet sheet design with hydrophobic fiber layers on the surface and a hydrophilic fiber layer in between, featuring interlaced parts with varying densities to control chemical solution discharge and reduce friction, using polyethylene terephthalate fibers with a diameter of 3.3 dtex or more for improved rigidity and reduced capillary action.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wet sheet is impregnated with chemical solution to improve cleaning effectiveness, then the cleaning ability is enhanced, but the frictional resistance with the floor surface increases and excessive chemical solution is discharged
Solution Approach 1:
The patent applies local quality by creating highly interlaced parts with different fiber densities in specific regions of the sheet. These localized areas with varying interlacing densities (10-20% area ratio) provide different friction characteristics and chemical solution discharge rates, allowing the sheet to maintain both cleaning effectiveness and reduced friction in different zones simultaneously.
2Reliability
If the wet sheet is impregnated with chemical solution to improve cleaning effectiveness, then the cleaning ability is enhanced, but collected trash and dust may adhere to the floor surface with the excessive chemical solution
Solution Approach 1:
The patent creates localized regions with highly interlaced parts that have higher fiber density, which control the discharge rate of chemical solution. This local variation in fiber structure ensures that chemical solution is discharged at appropriate rates (0.001-0.0038 g/cm²), preventing both excessive discharge that would cause adhesion and insufficient discharge that would reduce cleaning effectiveness.
3Ease of operation
If hydrophobic fiber layers are used on the surface to reduce friction, then the sliding ability is improved, but the control over chemical solution discharge becomes difficult
Solution Approach 1:
The patent combines hydrophobic fiber layers with locally varied interlacing densities. The hydrophobic fibers provide the base sliding ability, while the highly interlaced parts with higher fiber density in specific regions (10-20% area ratio) locally control chemical solution discharge rates, achieving both ease of operation and controlled substance discharge simultaneously.
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 controls chemical solution discharge, prevents the release of collected objects, and enhances the efficiency of trash and dust collection by optimizing friction resistance and solution viscosity, allowing for a lighter wiping action with reduced initial load.
Implementation Method 1
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 whose discharge amount is 0.001 to 0.0038 g/cm2
Implementation Method 2
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 where the hydrophobic fiber layers are interlaced with the hydrophilic fiber layer
Data Source
AI summary
A wet sheet for cleaning includes multiple layers and is impregnated with a chemical solution. The wet sheet includes hydrophobic fiber layers arranged in a front surface layer and a back surface layer, and a hydrophilic fiber layer arranged in an intermediate layer. The hydrophobic fiber layers have an interlaced part with a high fiber density where the hydrophobic fiber layers are interlaced with the hydrophilic fiber layer. The interlaced part has 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 higher fiber density. The highly interlaced part is formed in an area ratio of 10 to 20% to an area of the front surface layer or the back surface layer. Static friction resistance of the wet sheet for cleaning is lower than kinetic friction resistance of the wet sheet for cleaning.