Friday, September 19, 2014
ACL Staticide’s Staticide ESD Safety Shield Static-Dissipative Coating is a simple-to-use protective coating solution for plastics. Made from blended durable polymer materials, the 6300Q solution provides dependable protection by allowing static to dissipate at a safe rate regardless of relative humidity. Regularly listed at $120.00, but with our FPF code savings you’ll get it for just $90.00. While this is a 3-day limited-time price, the coupon is unlimited. Use the code as many times as you like while it is valid—and please feel free to share the code with your friends, colleagues, and via social media.
Each week, we’ll promote our FPF selection on The Q Source Resource, via our email newsletter, and all over our social media accounts. We encourage our valued customers to read those resources and to visit QSource.com on a regular basis for the latest FPF offers (look out for our FPF logo). Please tell your friends & colleagues about Featured Product Friday.
For further questions about Featured Product Friday, please read our informational blog post, call us (800-966-6020), or send us an email. Please note: This promo is valid only at QSource.com.
Monday, September 15, 2014
Are you subscribed to multiple social media networks like we are? Do you find it difficult it to keep up with all of the updates from the people you follow? Do you feel like you’re missing a lot of good information?
“The Social Rewind,” is a weekly blog digest of what we thought were the most interesting, funny, or informational social media posts of the previous week. Q Source follows some really fascinating companies and individuals on Twitter, Facebook & Google+ and we want to share the best of what they have to say.
Leading off this week, TE Connectivity shared this post about robot butlers working at Starwood Hotels. How much do you a tip a robot?
Just how much Internet connectivity do we need? Zebra Technologies shared this post about common items, like diapers and doorbells, which will soon be Internet trackable.
There were many 9/11-related posts last Thursday, but this photo shared by Conductive Containers Inc. (CCI) pretty much says it all.
Remember when Legos were just primary-colored plastics blocks that you built stuff with? MAKE Magazine’s post looks at one artist who uses them as a printing tool.
Some of the hype from Apple’s long-awaited keynote presentation (yes, the iPhone 6 and Apple Watch are finally on their way) has died down now. But if you missed the two-hour event, Mashable posted this video that shows you everything you need to know in 90 seconds.
And we close out this week’s column with our post of a new Guest Blog by ACL Staticide’s Steve Allen. Learn about the strength of a cleaning solvent and Kauri-Butanol values.
There you have it…another quick look at a few of last week’s most interesting social media posts. We hope you enjoyed this week’s Social Rewind. We’d love it if you shared other interesting blog posts with us. Keep on reading! We’re look forward to continuing The Social Rewind through 2014. This is an exciting year for us as we celebrate our 30th anniversary. Keep your eyes open for new features, promotions, interviews, and more. See you next week!
If there's topic you'd like to see The Q Source Resource write about please let us know. We'd also appreciate if you share our blog posts with your friends and colleagues via the social media links below. If you have questions or comments about Q Source or The Q Source Resource please leave us a message in the comments section.
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Friday, September 12, 2014
In the meantime, visit QSource.com to shop our regular low prices on more than 30,000 quality products from all the top brands. We offer excellent selection and savings on popular items like Andersen Hog Heaven Anti-Fatigue Mats (save up to 33% off), Bevco 7000 Series Chairs (check out our low-priced, large selection), Excelta Cutters (2- to 5-star quality to fit your exact needs), or Vision Engineering Mantis Stereo Microscopes (impressive savings on state-of-the-art visual inspection systems).
We’re nearing our 40th Featured Product Friday promo and we’d love your feedback. Have you purchased any of the featured items? What have you thought about the items featured and their promo prices? Do you have suggestions for future featured products? Please leave a comment or contact us with your input. Your feedback helps us serve you better and we very much appreciate your time.
For further questions about Featured Product Friday, please read our informational blog post, call us (800-966-6020), or send us an email.
Thursday, September 11, 2014
Q Source Office Closed Sept. 12–14 for Major Software Upgrade; Web Site Will Remain Open for Business
While we expect to be closed from around 3:00 p.m. (EST) on Thursday, September 11th, through Sunday, September 14th, our Web Site will remain available 24/7. Orders placed via QSource.com during our office closure will be processed as soon as possible upon re-opening. We are currently on target to be open for business as usual on Monday, September 15th.
For further information and status updates, please stay tuned to our Q Source Resource Blog and our social media accounts. We thank you for your patience and look forward to serving you soon.
Tuesday, September 9, 2014
Our guest blogger, Steve Allen from ACL, returns with an examination of cleaning solvent strengths and Kauri-Butanol numbers
When talking about the cleaning strength or aggressiveness of electronics cleaning solvents, we often refer to the solvent’s Kauri-Butanol number, or KB. The KB value is a test that measures the ability of a hydrocarbon solvent to overcome molecular binding forces in a standard solute. The KB test is one of a number of “cloud-point” determinations that can be used to measure and order solvents in a ranking based on relative solvent power. ACL Staticide uses this relative measure to determine and publish the general cleaning strengths of its broad range of electronics rework and repair products.
Other cloud-point determinations are aniline cloud point, solubility grade, wax number, and heptane number. All have their specific uses, but the KB value is the most widely used test for gauging the relative solvent power of most hydrocarbon solvents.
|Kauri resin from the Kauri Tree|
How does KB actually work? Kauri resin is a fossilized resin derived from the sap of the Kauri pine tree, which grows primarily in New Zealand. This resin dissolves easily in normal butyl alcohol (butanol) but will not dissolve very well in hydrocarbon solvents. To run the KB, one dissolves 20 grams of the Kauri resin in a fixed amount of n-butanol. This solution is then titrated with the hydrocarbon solvent to a “cloud point” or until the clear solution first turns slightly turbid or hazy. To make the cloud point easier to see, the test is usually performed over a page of ten-point type. When the ten-point type becomes slightly blurred or not quite crystal clear, you have reached the cloud point. The volume or number of milliliters of hydrocarbon solvent used to reach the cloud-point is reported as the Kauri-Butanol or KB value of the hydrocarbon solvent. By this methodology, the greater the volume of solvent needed to reach the cloud-point, the “stronger” the hydrocarbon solvent. A solvent with a KB value of 100 (ml) is a much stronger solvent than one with a KB value of 50.
The Kauri–Butanol value definition is, according to the ASTM (method D 1133), the volume given in milliliters of any solvent with which at 25 °C (77 °F), a standard Kauri–Butanol solution is titrated and a certain amount of turbidity is detected. The accepted KB value range goes from 20 or 25, to 120 or 130. The KB values for ACL precision solvent cleaners, which are mixtures of various hydrocarbon solvents, are determined by running the Kauri-Butanol titration with the cleaner product. They can also be estimated using the KB value of the blended product from the KB values of its individual solvent components and their proportions in the solvent mixture.
KB values for most of ACL’s solvent cleaners are found on the product’s technical data sheet. Most of the ACL solvent cleaner blends have KB values of 50 or less, but the stronger and more aggressive products like Precision Wash NF, or Precision Wash NS have KB values above 100. The higher the KB value of an ACL cleaner, the more likely it is that this product will attack soft plastics like polystyrene and polycarbonate. You would normally select an ACL cleaner with a high KB value only if you need heavy-duty cleaning of thick or encrusted residues and have no sensitive plastics in the application. If only light-duty cleaning or plastic safety is required, then the user should select an ACL cleaner that has a KB value of 50 or less.
Even today, many people still misinterpret the KB value’s meaning. They relate the KB value with the titrating solvent “power.” As a matter of fact, there is no such thing as “solvent power.” Each solvent has its own capacity to dissolve a certain type of substance more or less effectively than others. This depends on its own physico-chemical properties, as well as those of the substance that has to be dissolved. In the beginning, the KB value was only used to evaluate the behavior of petroleum fractions. They would yield KB values of up to 30 or 35. Since this method was arbitrarily taken as a measure of the “solvent’s power,” very soon it was adopted to measure other type of solvents. For instance, chlorinated hydrocarbons, such as perchloroethylene, may be the most industry representative, legacy solvent used in our industry. It yields a KB value of about 90.
With regard to chemicals and solubility, we are usually referring to dissolving a small amount of a liquid or solid, the solute, in a larger volume of liquid, called the solvent. When a liquid solvent dissolves a solute the molecules of the solvent break the electrostatic or binding forces that bind the molecules of the solute together. Solvent molecules force themselves between and around the solute molecules, until the molecules that made up the solute are finely dispersed within the larger volume of solvent molecules. There are some solvents such as alcohols, ketones, and glycol ethers that cannot be evaluated using the KB method, because they can readily dissolve the Kauri gum--so they can hardly form any turbidity when titrated into a Kauri–Butanol standard solution.
|These ACL precision cleaners have KB values above 100|
As a case in point, Perchloroethylene with its aforementioned KB value of about 90. Not that this solvent is “stronger” than the hydrocarbons. It has simply different properties that allow an easier dissolution of substances such as varnishes and lacquers (and conformal coatings). This solvent can still dissolve greases and oils, but it begins damaging some synthetic garments over time. It may also provoke a certain degree of color bleeding. Perchloroethylene can dissolve most of the stains found in the garments while the potential damages that it can cause are still controllable. That is why “Perc” continues to be the leading solvent in the dry-cleaning industry. There are some other types of solvents, such as 1,1,1, trichloroethane, with a KB value of 124. This solvent has been found to be too aggressive for most of the natural and synthetic fabrics found in most garments today. That is why it hasn’t been successful in the electronics industry.
However, with all this said, Kauri-Butanol values are not the final word in cleaning strength or solubility tests. In fact KB values tend to assign a higher solubility to a solvent than it really has. Also certain kinds of solvents cannot be tested with the Kauri-Butanol protocol as they prove to be infinitely soluble in this test procedure. For this reason ketones like acetone and MEK and glycol ethers cannot be tested by the Kauri-Butanol procedure to determine solvent solubility for these. As we can see, the Kauri–Butanol value can be useful to evaluate the proper solvent to be used for a given cleaning task. Those who have a variety of cleaning applications or multisolvent cleaning equipment (vapor degreasing, parts washers, and spray cabinets), can choose the kind of solvent that best serves the particular cleaning needs of their plant and application. The KB value is one of the parameters that have to be taken in account for that purpose. You can find all the necessary KB values for our solvents on ACL’s tech data sheets.
Q Source thanks Steve for another informative Guest Blog contribution to The Q Source Resource.
For information about ACL Staticide products, please visit our ACL Staticide Department at QSource.com. You may also contact us via email or phone at 800-966-6020 and one of our associates will be happy to assist you.
If there's a product or topic you'd like to see The Q Source Resource write about please let us know. We'd also appreciate if you share this blog post with your friends and colleagues via the social media links below. If you have questions or comments about cleaning solvent strengths and Kauri-Butanol values, please leave Steve Allen a message in the comments section.
For additional Q Source product information, reviews, how-to articles, and special offers please subscribe to our email newsletter.
Steve Allen's Previous Guest Blogs
- Volatile Organic Compounds & Evolving Regulations – Guest Blog
- Use Proper Balance to Create an Efficient, Cost-Effective PCB Cleaning Process - Guest Blog
- Why Clean "No Cleans?" Printed Circuit Board Flux Removal – Guest Blog
- How to Use the 80:20 Rule to Focus on the Business Innovation Process - Guest Blog