Wet sheet for cleaning and method for producing wet sheet for cleaning
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Solution Overview
Problem
Conventional wet sheets for cleaning are prone to excessive chemical solution discharge, leading to insufficient cleaning and increased friction resistance, which affects their price competitiveness.
Innovation Solution
A wet sheet design with a pulp-based inner layer and polyethylene terephthalate outer layers, combined through water-jet interlacing, to control chemical solution discharge and reduce friction, maintaining cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the impregnation rate of chemical solution or grammage of wet sheet is increased to avoid shortage of chemical solution, then the cleaning effectiveness is improved, but the production cost increases and price competitiveness decreases
Solution Approach 1:
The invention changes the grammage parameter of the inner layer to a specific range (20-75 g/m²) and adjusts the pulp content ratio (50-100%) to optimize chemical solution retention. This parameter optimization allows sufficient chemical solution discharge control without excessive impregnation, reducing production costs while maintaining cleaning effectiveness
Solution Approach 2:
The invention uses a composite structure combining pulp (hydrophilic) in the inner layer with synthetic fibers (hydrophobic) in the outer layer. This composite material design leverages the hydrophilic nature of pulp to retain chemical solution and the hydrophobic nature of outer layer fibers to prevent excessive discharge, achieving cost-effective cleaning performance
2Quantity of substance
If the wet sheet is made wet on the surface to improve cleaning capability, then the chemical solution availability is improved, but the frictional resistance with floor surface increases requiring high load to slide
Solution Approach 1:
The invention applies local quality by differentiating the moisture distribution across different layers: the inner layer is hydrophilic and retains chemical solution, while the outer layer is hydrophobic and limits surface wetness. This localized moisture control provides sufficient chemical solution for cleaning while reducing excessive surface wetness that causes high friction
Solution Approach 2:
The invention utilizes the porous structure of pulp in the inner layer to capillary-retain chemical solution, making it available for cleaning while the hydrophobic outer layer with specific fiber diameter (3.3 dtex or more) prevents excessive solution migration to the surface, thereby reducing frictional resistance
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 design allows for effective cleaning over a larger area without excessive chemical solution loss and reduced friction, enhancing price competitiveness.
Implementation Method 1
the inner layer contains pulp by equal to or more than 50 wt%, has a grammage of 20 to 75 g/m2
Implementation Method 2
the hydrophobic fiber of the outer layers includes polyethylene terephthalate fiber at a rate of 80% or more and a fiber diameter of the polyethylene terephthalate fiber is 3.3 dtex or more
Data Source
Figure 1~2
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 characterized by being provided with outer layers (3) respectively disposed on a front surface layer and a rear surface layer, and an inner layer (2) having a hydrophilic fiber and disposed on an intermediate layer that is interposed between the outer layers (3), wherein: the inner layer (2) is composed of a plurality of layers and is provided with a hydrophilic fiber inner layer (21) having the hydrophilic fiber, and a hydrophobic fiber inner layer (22) having a hydrophobic fiber; the hydrophobic fiber inner layer (22) is adjacent to at least one of the outer layers; the inner layer (2) includes 50 wt% or more of pulp, and has a basis weight of 20-75 g/m2; and the inner layer (2) has a mass which is 20-70% of the total mass of the wet sheet for cleaning.