PTFE is extremely chemical resistant. What is the substrate, steel? This allows the surface to reflect and or radiate nearly all solar radiation thus keeping the temperature to a minimum. } Any rounding of corners and abrupt changes in geometry will improve results. - Which alloy matters a lot. Presumably, they would have done tests to determine that their chemistry brightens as good as or better than generic solutions. Above this wavelength spectrum, the reflectivity of the optics stays continuously high up to 10 µm. Necessary cookies are absolutely essential for the website to function properly. Is it prone to biofilm formation? Fluence (UV Dose) Required to Achieve Incremental Log Inactivation of Bacteria, Protozoa, Viruses and Algae, the chart on the Porev Virtek PTFE Reflectivity. Please reference the chart on the Porev Virtek PTFE Reflectivity section. In order to give you a better service POREX® Corporation uses cookies. Five microns is five times ten to the minus 6 so .5 microns would be 5 times ten to the minus seven is that correct? FORUMcurrent topics. You should avoid wet cleaning the PTFE surface too frequently (it is best to draw off any dust / dirt with a vacuum), but using mild soaps with a clean cloth followed by a wet wipe with another clean cloth should remove most contamination. Q. Hi. & Install'nChemicals & Consumables We are still working on specific cleaning procedures depending on the application. We are performing some longevity testing but fully expect it to withstand several thousands of cycles. healthier & more productive.™. But opting out of some of these cookies may have an effect on your browsing experience. How Google uses data when you visit this site. This choice raised the question of which side to use. If your company produces specular anodized aluminum sheet with specular reflectances between 87% to 95% I would be very interested in receiving some information from your company. Porex Virtek PTFE film comes in a variety of pore size/pore volume configurations. I know that some manufacturers of infrared reflectors for infrared drying systems use the same general technology mentioned above, of brite dipping and anodizing, but they add a gold dye step. Post your own question ... Household aluminum foils was chosen as reflective material to build the concentrator. "button": { If you need a product/service, please check these Directories: JobshopsCapital Equip. However, in thicknesses below 1.2 mm, you will get some light transmission. "palette": { The dosimeters are calibrated in mJ/cm2 – so all you need to do is look at the color change to get an approximate dosage. After one of our most popular webinars in The Science Inside series – How to Minimize UV Disinfection Efficiency Using Microporous PTFE recorded on June 3 and re-broadcast on June 30 in Asia Pacific – I decided to pull together the most frequently asked questions and share them more broadly. Porex Virtek PTFE is not affected by UVA light. Or, if you know of a supplier that does have this type of sheet I would be pleased if you could provide me with a contact. In the case of Porex Virtek PTFE, of the total reflectivity stated, just under 2% is absorbed and the rest is transmitted (transmission is higher for thin materials). 1/2 micron is .0000005 meters or approx., as per your conversion factor, .00002". I've found a couple of labs that can do the work for me, but I have not been able to find any reference books, etc., on the reflective properties of anodized aluminum. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful. see our Review. Answering Your UV Reflectivity Media Questions. Ultrapure aluminum gives good reflectance, most alloys significantly less. If properly designed however, you can actually vent through the microporous Porex Virtek PTFE. Yes, good quality costume jewelry is sometimes called "micron gold": 1 micron thickness, and good color can be seen at 1/4 of that thickness on polished jewelry. We also use third-party cookies that help us analyze and understand how you use this website. Perhaps a supplier of proprietary bright dip solutions like Phosbrite by Albright & Wilson can help you. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are as essential for the working of basic functionalities of the website. If you wanted 99% reflectivity, you'd need a broadband dielectric, but from the sound of it aluminum foil would do the job for you. from Abe Books You also have the option to opt-out of these cookies. What is the difference in exposure time for a virus vs a bacterium? While aluminum is useful for applications that require spectral reflectance, the metal does not produce a uniform Lambertian distribution of light[1]. The best way to adhere Porex Virtek PTFE to a surface is using a double-sided adhesive tape (like 3M 93020LE). July 29, 2011. Thanks. Without the depth of the coating how would you figure out the volume of gold. That's a starting point, not an answer, and you should be able to check the thickness on the existing units.
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