Volatile-Additive Cleaning Pad for Residue-Free Dust Adhesion
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Solution Overview
Problem
Existing hand-held cleaning devices, such as dusters and dust mops, face issues with dust adhesion due to the lack of effective retention mechanisms and the use of traditional cleaning pads that do not adequately pick up dust, especially with varied dust compositions having hydrophobic and hydrophilic properties.
Innovation Solution
A cleaning pad with a combination of fibers and a non-woven sheet, incorporating a volatile additive with amphiphilic properties and a vapor pressure between 0 to 10 kPa, which is applied during manufacturing to enhance dust adhesion without leaving residues, and is stored in a container to prevent premature evaporation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional mineral oil is applied to cleaning pads, then dust adhesion is improved, but residue is left on surfaces and dust pick-up efficiency is limited
Solution Approach 1:
The patent changes the chemical parameters of the cleaning pad by replacing traditional mineral oil with a volatile liquid having specific properties (vapor pressure of 0.1-10 kPa, surface tension of 20-72 mN/m). This parameter change allows the liquid to evaporate completely after dust pickup, eliminating residue while maintaining dust adhesion through controlled surface tension properties.
Solution Approach 2:
The volatile liquid additive acts as a temporary, consumable substance that performs its function during the cleaning process and then disappears through evaporation. This is analogous to using a disposable element that serves its purpose and is then discarded (evaporates), leaving no harmful residue on the cleaned surface.
2Productivity
If amphiphilic additive is added to cleaning pad, then dust adhesion is improved by 25-68%, but device complexity increases
Solution Approach 1:
The patent modifies the chemical composition parameters of the cleaning pad by incorporating an amphiphilic additive with specific molecular structure (hydrophilic head and hydrophobic tail). This single parameter change in composition achieves the 25-68% improvement in dust adhesion across varied dust types without requiring complex mechanical or structural modifications to the cleaning device.
3Object-generated harmful factors
If volatile liquid with vapor pressure of 0.1-10 kPa is used, then residue-free cleaning is achieved, but liquid evaporation control becomes more difficult
Solution Approach 1:
The patent carefully selects and controls the vapor pressure parameter of the volatile liquid within the specific range of 0.1-10 kPa. This parameter optimization ensures the liquid evaporates at a controlled rate during normal cleaning operations - not too quickly to cause premature drying, and not too slowly to leave residue. The surface tension parameter (20-72 mN/m) is also optimized to balance adhesion and evaporation.
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 amphiphilic additive improves dust pick-up efficiency by 25% to 68% compared to traditional mineral oil-treated pads, ensuring effective dust retention and minimal surface residue during and after cleaning.
Implementation Method 1
Capillary forces depend on two properties of the liquid-surface interaction. The capillary adhesion force is directly proportional to the liquid surface tension, but also directly proportional to the cosine of the contact angle of wetting for both the fiber-liquid and dust particle-liquid interactions.
Implementation Method 2
The surface tension of liquids can range from 72 mN/m for water to approximately 20 mN/m for aqueous formulas with surfactants.
Implementation Method 3
the cosine of the contact angle can range from 1 to 0 as the liquid oil wets, or does not wet, the dust particles
Implementation Method 4
a volatile liquid that evaporates quickly during and after the dusting process. Such a volatile liquid is advantageous in that it can aid in cleaning, but in that it does not leave a residue on the surface after dusting.
Data Source
AI summary
A cleaning pad (28) is disclosed. The cleaning pad (28) includes a base sheet (202) bonded to a fiber mat (203) and exhibits improved debris retention without leaving a residue on a surface to be cleaned when a volatile additive is applied to the pad (28).