Allergen Pickup Testing for Surface Cleaning Products
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Solution Overview
Problem
Current methods for determining the effectiveness of household cleaning products in removing allergens like cat and dog dander from surfaces lack standardized, objective, and repeatable tests, leading to inconsistent results and potential damage to furniture due to dry dusting methods.
Innovation Solution
A three-pass/one-panel dusting method that uses a series of procedures to calculate the percentage of allergens picked up from a surface, including applying a known amount of dust, using a cleaning product like Pledge, and assaying the allergen concentration in a buffer solution to correct for variables such as deposition and extraction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a dry cloth is used to dust surfaces, then dust and allergens are removed from surfaces, but dust and allergens are scattered into the air where they can be inhaled and furniture may be scratched
Solution Approach 1:
The invention changes the physical state of the dusting medium from dry to damp, and introduces cleaning formulations with specific properties (anti-static agents, surfactants) to modify how dust is captured. This transforms the dusting process from one that scatters particles to one that traps and removes them, eliminating the harmful scattering effect while maintaining cleaning effectiveness
Solution Approach 2:
The invention introduces a cleaning formulation as an intermediary substance between the dusting cloth and the surface. This intermediary contains anti-static agents and surfactants that facilitate dust adhesion to the cloth while preventing dust from becoming airborne, thereby mediating the interaction between the cloth and surface to eliminate harmful scattering
2Measurement precision
If water is applied to wood furniture surfaces, then dust pick-up is improved, but water may penetrate the furniture finish and raise the grain on wood causing damage
Solution Approach 1:
The invention changes the composition and properties of the liquid applied to surfaces, transforming it from plain water to a controlled cleaning formulation with specific surfactant concentrations and anti-static agents. This modified liquid provides effective dust pick-up while its controlled composition prevents excessive moisture penetration that would damage wood finishes
Solution Approach 2:
The cleaning formulation acts as an intermediary that enables effective dust removal without the harmful effects of water. The surfactants and anti-static agents in the formulation mediate between the need for moisture-based dust pick-up and the need to protect wood finishes from water damage, allowing dust removal while preventing finish penetration
3Measurement precision
If standardized objective tests are developed to quantify allergen removal, then cleaning effectiveness can be accurately measured, but test complexity and procedural requirements increase
Solution Approach 1:
The invention segments the testing process into distinct, standardized phases: dust application with controlled amount and composition, cleaning product application with specified procedures, allergen extraction using buffer solutions, and quantification through ELISA assays. This segmentation transforms a complex measurement challenge into manageable, repeatable steps that can be systematically executed and validated
Solution Approach 2:
The invention incorporates feedback mechanisms through controlled variables and correction factors. The test methodology uses known amounts of dust with characterized allergen content, applies cleaning products under controlled conditions, and uses extraction efficiency data to correct measurements. This feedback loop ensures accurate quantification of allergen removal while maintaining procedural consistency
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
This method provides a standardized and repeatable test for determining the allergen pick-up efficiency of cleaning products, ensuring accurate results and minimizing damage to surfaces, with the Pledge product achieving a mean allergen pick-up efficiency of 93.0% for Fel d1 and 94.6% for Can f1 allergens.
Implementation Method 1
Commercial dusting formulas, e.g., Pledge® Clean & Dust spray, have been developed with a unique combination of anti-static agents that attracts and removes more dust and allergens than a plain cloth, wet or dry, alone.
Implementation Method 2
assaying the solution to determine the concentration of allergens
Data Source
AI summary
A test method is disclosed that can be used to test cleaning products. The test method includes applying a known amount of test material to a surface, cleaning the surface and calculating the amount of allergens picked-up from the surface. The calculated amount of allergens picked-up is then corrected for several measurable variables to provide a more accurate determination of the percentage of allergens picked up with the cleaning product.