Artificial testing soil and method of testing

• US 7,871,821 B2
• Filed: 12/30/2005
• Issued: 01/18/2011
• Est. Priority Date: 06/15/2001
• Status: Active Grant

• Current Assignee: SC Johnson & Son Incorporated
• Original Assignee: SC Johnson & Son Incorporated
• Inventors: Wietfeldt, John R., Gipp, Mark M.
• Primary Examiner(s): Menon; Krishnan S
• Assistant Examiner(s): Fritchman; Rebecca
• Application Number:
  US11/323,931
• Publication Number:
  US 20060160225A1
• Time in Patent Office: 1,845 Days
• Field of Search: 436/8, 436/19, 436/183, 252/88.1, 252/88.2, 252/408.1
• US Class Current: 436/8
• CPC Class Codes: C05G 1/00 Mixtures of fertilisers belonging individually to different subclasses of C05
• CPC Class Codes: E02D 29/0258 characterised by constructional features
• CPC Class Codes: G01N 19/06 Investigating by removing material, e.g. spark-testing
• CPC Class Codes: G01N 31/222 for investigating moisture content
• CPC Class Codes: Y10T 436/10 Composition for standardization, calibration, simulation, stabilization, preparation or preservation; processes of use in preparation for chemical testing
• CPC Class Codes: Y10T 436/108331 Preservative, buffer, anticoagulant or diluent
• CPC Class Codes: Y10T 436/109163 Inorganic standards or controls

Abstract

An artificial test soil comprises particulate, hair, and fiber components, wherein said particulate component consists of mineral, food, and plant materials, so chosen and proportioned as to correlate to a typical soil found in the home. The test soil may be used to test cleaning products by application of a known amount thereof to a surface, cleaning of said surface, and determination of the amount of said soil removed from said surface.

Claims

1. A method for forming a simulated household dust composition, the method comprising the steps of:

A) providing a first container and a second container;

B) introducing a fibrous fraction component into the first container, the fibrous fraction component comprising up to about 45% to about 55% by weight of the simulated household dust, and wherein about 78% to about 100% by weight of the fibrous fraction component is formed from cotton fibers;

C) mixing the fibrous fraction component in the first container;

D) introducing a particulate fraction component into the second container, the particulate fraction component comprising from about 45% to about 55% of the simulated household dust, and wherein about 40% to about 70% by weight of the particulate fraction component is formed from skin cells;

E) mixing the particulate fraction component in the second container; and

F) mixing the fibrous fraction component from the first container with the particulate fraction component from the second container.

2. The method of claim 1 wherein the fibrous fraction component includes cotton fibers present in an amount of between about 70% to about 100% by volume of the fibrous fraction component.

3. The method of claim 2 wherein the fibrous fraction component includes synthetic fibers and hair fibers.

4. The method of claim 3 wherein the synthetic fibers are present in an amount of between about 10% to about 40% by volume of the fibrous fraction component and the hair fibers are present in an amount between about 1% to about 10% by volume of the fibrous fraction component.

5. The method of claim 1 wherein the particulate fraction component includes skin cells present in an amount of between about 40% to about 70% by volume of the particulate fraction component.

6. The method of claim 5 wherein the particulate fraction component includes plant fragments, construction material, soil, starch, and low temperature combustion products.

7. The method of claim 6 wherein the plant fragments are present in an amount of between about 10% to about 40% by volume of the particulate fraction component, the construction material and soil are present in an amount of between 10% to about 40% by volume of the particulate fraction component, the starch is present in an amount between about 1% to about 10% by volume of the particulate fraction component, and the low temperature combustion products are present in an amount of between about 1% to about 10% by volume of the particulate fraction component.

8. The method of claim 1 wherein the step of mixing the fibrous fraction component comprises mixing the fibrous fraction component until homogeneously mixed in the first container.

9. The method of claim 1 wherein the step of mixing the particulate fraction component comprises mixing the particulate fraction component until homogeneously mixed in the second container.

10. The method of claim 1 wherein the step of mixing the fibrous fraction component with the particulate fraction component comprises mixing the fibrous fraction component and particulate fraction component until homogeneously mixed.

11. A method for forming a simulated household dust composition for testing the efficacy of an elevated surface cleaning device, the method comprising the steps of:

A) introducing a fibrous fraction component into a container, the fibrous fraction component comprising up to about 45% to about 55% by weight of the simulated household dust, and wherein about 78% to about 100% by weight of the fibrous fraction component is formed from cotton fibers;

B) introducing a particulate fraction component into the container, the particulate fraction component comprising from about 45% to about 55% of the simulated household dust, and wherein about 40% to about 70% by weight of the particulate fraction component is formed from skin cells, and;

C) mixing the fibrous fraction component with the particulate fraction component to form the simulated household dust;

wherein the simulated household dust is configured to simulate concentrations of fibrous components and particulate components found on elevated surfaces.