Determining aerosol material compatibility

Patent metadata

Field	Value
Publication number	US-9546933-B2
Application number	US-201414447554-A
Country	US
Kind code	B2
Filing date	Jul 30, 2014
Priority date	Jul 30, 2014
Publication date	Jan 17, 2017
Grant date	Jan 17, 2017

Abstract

Provided are methods for testing aerosol material compatibility of various samples to disinfectants, decontaminants, and other such materials that are used as aerosols. A test is performed in a controlled environment, such as an aerosol chamber, using a specific set of test parameters representative of actual use of tested materials, such as dispensing parameters and exposure parameters. During the test, a test surface of the sample is exposed to an aerosol mist. Other surfaces may be protected. After exposure to the aerosol mist, the sample may be allowed to sit for a period of time. The sample is later cleaned and tested to determine effects of various materials in the mist on the sample. In some embodiments, some or all operations may be repeated for the same sample or different samples. The test parameters may be varied to determine compatibility limits.

First claim

What is claimed is:

1. A method for testing aerosol material compatibility, the method comprising:
dispensing a first aerosol mist onto a test surface of a first sample using a first set of test parameters,
wherein the first aerosol mist comprises at least one of a first disinfectant or a first decontaminant,
wherein the first set of test parameters comprises a first period of time defining exposure duration of the test surface to the at least one of the first disinfectant or the first decontaminant provided in the first aerosol mist, and
wherein dispensing the first aerosol mist forms a first deposit of the at least one of the first disinfectant or the first decontaminant on the test surface of the first sample;

removing the first deposit from the test surface of the first sample; and
testing the first sample for one or more properties to determine effect of aerosol exposure onto the first samples;
dispensing a second aerosol mist onto a test surface of a second sample using a second set of test parameters,
wherein dispensing the second aerosol mist forms a second deposit of at least one of a second disinfectant or a second decontaminant on the test surface of the second sample, and
wherein the second set of test parameters varies from the first set of test parameters in at least one of a spray pattern, a droplet size, a dispensed volume, a viscosity, or a temperature of the material;

removing the second deposit from the test surface of the second sample; and
after removing the second deposit, testing the second sample for the one or more properties to determine effect of aerosol exposure onto the second sample.

2. The method of claim 1 , further comprising determining the first period of time,
wherein the first period of time is determined based on composition of the at least one of the first disinfectant or the first decontaminant provided in the first aerosol.

3. The method of claim 1 , further comprising, prior to testing the first sample for the one or more properties, dispensing a second aerosol mist onto the test surface of the first sample, wherein the second aerosol mist comprises at least one of a second disinfectant or a second decontaminant.

4. The method of claim 3 , wherein the second aerosol mist is dispensed without prior removing the first deposit of the at least one of the first disinfectant or the first decontaminant from the test surface of the first sample.

5. The method of claim 1 , further comprising, after dispensing the first aerosol mist onto the test surface of the first sample and prior to removing the first deposit from the test surface of the first sample, maintaining the first deposit on the test surface of the first sample for a second period of time.

6. The method of claim 1 , further comprising determining the second set of test parameters,
wherein the second set of test parameters is determined based the effect of aerosol exposure onto the first sample using the first set of test parameters.

7. The method of claim 1 , further comprising cleaning the test surface of the first sample prior to dispensing the first aerosol mist onto the test surface of the first sample.

8. The method of claim 1 , further comprising applying a barrier onto a portion adjacent to the test surface of the first sample.

9. The method of claim 1 , wherein the test surface is positioned substantially parallel to a flow direction of the first aerosol mist while dispensing the first aerosol mist onto the test surface of the first sample.

10. The method of claim 1 , wherein removing the first deposit of the material from the test surface of the sample comprises rinsing the test surface with a solvent and drying the test surface.

11. The method of claim 1 , wherein the one or more properties are selected from the group consisting of surface corrosion, weight change, hydrogen embrittlement, cadmium removal, tensile strength, hardness, stress crazing, hardness, elasticity, sealant shear strength, and voltage withstand.

12. The method of claim 1 , wherein the first aerosol mist comprises a solvent.

13. The method of claim 12 , wherein the solvent comprises at least one of ethanol and water.

14. The method of claim 1 , wherein a concentration of the at least one of the first disinfectant or the first decontaminant in a liquid forming the first aerosol mist is between about 1% and 10%.

15. The method of claim 1 , wherein the first aerosol mist has a droplet size of between about 0.5 micrometers and 20 micrometers.

16. The method of claim 1 , wherein the test surface is positioned at an angle ranging from about 15° to about 30° from a direction of a gravity during dispensing of the first aerosol mist onto the test surface of the first sample.

17. The method of claim 1 , wherein the first sample is maintained at a temperature ranging from about 65° F. to about 75° F. during dispensing of the first aerosol mist onto the test surface of the first sample.

18. The method of claim 1 , wherein the at least one of the first disinfectant or the first decontaminant comprises one of hydrogen peroxide, quaternary ammonium, parachlorometaxylenol, acetic acid, or peracetic acid.

Assignees

• Boeing Co

Inventors

• Van Camp Conor J
• Zervas Chris T
• Park Shawn H

Classifications

• G01N1/31 Primary

  Apparatus therefor · CPC title

• A61L9/14

  using sprayed or atomised substances {including air-liquid contact processes} · CPC title

• G01N17/00

  Investigating resistance of materials to the weather, to corrosion, or to light · CPC title

• G01N2001/317

  spraying liquids onto surfaces · CPC title

• G01N1/34

  Purifying; Cleaning {(processes or apparatus for extracting or separating nucleic acids from biological samples C12N15/1003)} · CPC title