Tuesday, November 13, 2018

Nitrile Allergies? They’re a Thing! But Accelerator-Free Nitrile Is Here to Save the Day – Guest Blog

by Fritz Maskrey, Vice President, Business Development, TechNiGlove International

TechNiGlove’s Fritz Maskrey looks at the allergic reaction that’s come to be known as a “nitrile allergy.”

When one thinks of allergies in the disposable glove world, the words "natural rubber" immediately come to mind.

The simple solution for such a problem was introduced in the 1990s using synthetic polymers. This new material would mimic the properties of natural rubber, without the protein allergens that were causing some users to develop allergic reactions. Hence, the product we know today as "thin-walled, disposable nitrile gloves" was born.

NITRILE GLOVE PRODUCTION: SIMPLE...BUT COMPLICATED

Liquid nitrile is refined and coated onto a ceramic former, then cured into an elastic polymer in the desired shape. The elastic polymer, which has been molded into the shape of varying sizes and lengths of a glove, is then double-chlorinated inside and out and finally processed to meet the specifications of whichever cleanroom environment the product is intended to meet.

Since the inception of nitrile, manufacturers have been in competition to create a better and more efficient process with which to make gloves. The outcome of such competition has been the addition of certain accelerators whose job it was to decrease the time needed for a glove to cure, reduce the cost of the overall material in use, give the material a softer feel, or any other attempt at giving the customer an overall lower cost and higher-performing item.

Certain sulfur-based chemicals have been developed to accomplish the previously mentioned goal. These chemicals have incredibly complicated chemical structures and even more complicated scientific names to go along with them. While this list of chemicals can have a litany of positive effects, the unfortunate side effects of such chemicals can be an allergic reaction (now known as "nitrile allergies") similar to that of latex.

Here are current examples of accelerators used in glove production:
  • N-cyclohexyl-2-benzothiazole sulfenamide
  • 2-Dibenzothiazole Disulfide
  • Tetramethylthiuram Disulfide
  • Diphenylguanidine
  • 2-Mercaptobenzothiazole
  • 3-Methylpiperidine

DOES THIS MEAN I’M ALLERGIC TO NITRILE GLOVES?

Well, yes...and no.

The good news is that most of these allergies are not to nitrile itself, they are simply allergic reactions to the chemicals that are used in the manufacturing process of such gloves. The specific allergic reaction is known as “Type 4” which is defined as:

"Allergies ‘Type 4’ are also called cell-mediated or delayed allergies. When T-cells become activated and result in an inflammation of the affected area. Unlike other type of allergies, Type 4 is not antibody related, but rather is a type of cell-mediated response."
One of the newer technologies being utilized in the production of thin-walled disposable gloves is "accelerator-free" nitrile. Production managers, line engineers, and corporate purchasers need be aware of this and not dismiss it as a marketing term, as it can drastically affect any users with a Type 4 allergy.

TECHNIGLOVE’S NITRILE AND ACCELERATOR-FREE NITRILE GLOVES

Visit Q Source’s TechNiGlove Department for information about, and to purchase, a wide selection of nitrile gloves including their Rival (RV400 Series) accelerator-free, low extractable, powder-free nitrile examination gloves. Please contact us directly (via email or phone at 800-966-6020) for inquiries about TechNiGlove’s Rival CR (RVCR1500 Series) soft modulus, accelerator-free, powder-free nitrile gloves for controlled environments.

Thanks, Fritz! Awareness of potential nitrile allergies is very important. We appreciate you sharing your expertise with the Q Source community.


TechNiGlove International is a leading manufacturer of disposable gloves for contamination-controlled environments. TechNiGlove's Nitrile, Sterile Nitrile, and Latex Gloves offer consistent quality for use in cleanrooms, sterile non-medical environments, pharmaceutical, and industrial settings.

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Tuesday, September 25, 2018

Come See Q Source at the Long Island SMTA Expo and Technical Forum on 10/4/18

Q Source will once again be one of the dozens of exhibitors at the annual Long Island SMTA Expo and Technical Forum being held Thursday, October 4, 2018, at the Melville Marriott in Melville, NY. A valuable resource for the SMTA community, the Expo runs from 11:00 a.m. to 5:00 p.m., and offers registration and free admission at the event.

This event offers a great opportunity to network with fellow colleagues, discover new products and resources, and attend the informative technical sessions. The SMTA Expo is focuses on the needs and interests of process engineers, SMT machine operators/technicians, quality engineers, test and component engineers, and project managers.

This year’s technical sessions will be held in the Whitman Room and include:

12:30 p.m. - SMT-WARS - Lessons Learned from a Contract Manufacturer and Their Customer Who Sued Them - Mike Konrad, President Aqueous Technologies

What happens when an electronic contract manufacturer follows their customer's instructions to the detriment of the product? Product failures, blame, drama, and a huge lawsuit. Mike Konrad will review the trials and tribulations of a contract manufacturer and their customer.

1:45 p.m. - Cleaning and Reliability in Review - Mike Konrad, President Aqueous Technologies
Combining the "best of" recent reliability-related presentations, this session features:

  • The increased need for contamination removal based on miniaturization and proliferation of electronic assemblies
  • The relativity of harsh environments
  • The proliferation of electronic assemblies (with a forecast of connected devices (i.e., IOT))
  • The results of a cleaning and coating survey
  • How clean is clean enough?

2:45 p.m. - In-House SMT Assembly Within Reach - Peter Swann, President Neoden USA, Founder and chief design engineer, Useful Arts Audio

Examining the capabilities and technology needed for affordable SMT production, this session provides a live demo showing the process of importing board layouts from CAD software, demonstrating the main configuration parameters, and populating a full board using tape, tray, and tube-fed components. The demo will offer strategies to maximize placement accuracy and assembly speed.

The demo will use parts as small as 0402 and place TQFP40 chips. The Neoden 4's 2-camera vision system will be used to illustrate the flexibility that allows creation of tray and short-tape feeders on the fly.

Please visit us at this excellent SMTA show to learn how we can help with your industry needs. For more info about the Long Island SMTA Expo and Technical Forum please visit their Web site. For info about Q Source, or to purchase products from our wide online selection, please check out the new QSource.com. You may also contact us by phone (800-966-6020), email, or live chat via our Web site.

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Friday, August 31, 2018

Q Source Office Closed for Monday’s Labor Day Holiday


Q Source will be closed for Labor Day on Monday, September 3, 2018. The office will re-open on Tuesday, September 4th.

Happy Labor Day


Our Web site, QSource.com, is open for shopping, quote requests, and email newsletter subscriptions  24/7, and any orders placed over the Labor Day holiday will be processed as soon as possible on Tuesday.

Thank you for being a Q Source customer. Have a safe, fun holiday weekend.

P.S. – If you have free time over the holiday, why not visit our YouTube Channel or our Q Source Resource Blog for a selection of informative and entertaining videos and articles.

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Monday, July 23, 2018

Assuring Proper Torque for Threaded Fasteners – Guest Blog

by ASG-Jergens, reprinted with slight edits

ASG’s Guest Blog provides tips for properly tightening threaded fasteners

One of the most important facets of working with threaded fasteners is knowing the torque requirements. Once you know the torque that you need to apply to a threaded fastener, there are several items that you need to examine.

The first thing you need to determine is the tool type (inline, right angle, or pistol grip). Not only is this an ergonomic issue, but also will affect the repeatability of the tool by making sure the tool is aligned to the work in a consistent manner.

Next, determine how the tool will control the torque. There are two main choices: mechanical clutch or electronic-controlled tools. A clutch tool can provide quite accurate torque at a lower price point. Electronic-controlled tools have a higher price point, but often include additional features. There are a few things to consider when choosing between a clutch tool and an electronic-controlled tool.

To begin, there’s joint rate. Is it a hard joint (steel to steel) or a soft joint (gasket), or somewhere in between? Generally, joint rate is somewhere in between, but you can determine the overall joint characteristics without employing the strict ISO 5393 definition. If you are dealing with a very hard joint and using a fast clutch tool, you risk overshooting the torque. This doesn’t necessarily rule out the clutch tool. Perhaps you could choose a slower tool. The benefit to the electronic-controlled tool in this case is that you can slow the tool down at the end of the rundown to try to eliminate the overshoot situation. In addition, if the fastener has a prevailing torque that is higher than the target torque, an electronic-controlled tool can be programmed to overcome the prevailing torque and then begin looking for the target.

Another thing to note is error proofing. The electronic-controlled tools have an advantage here as well, but there are some error-proofing tactics you can employ with clutch tools. For example, a pneumatic clutch tool can be used with a qualifier that will confirm that the has tool shut off within a certain air pressure and time parameter. Clutch tools can also be used with batch counters or to send a clutch signal to indicate that the tool shut off. The electronic-controlled tools can go a step farther when it comes to error proofing. Often, bar code scanners or socket/bit trays are used to ensure the right torque is applied to the correct job. These tools also generally have an additional error-proofing feature-angle encoders. This allows the tool to catch cross threads, strip outs, and other issues.

The next characteristic to establish is the need for traceability and/or real data collection. Although some clutch tools can send out a clutch signal to perform line control, the data-collection part of the equation is limited to go/no go, good/bad, etc. The advantage of the electronic-controlled tool is that the transducer in the tool is traceable to NIST and the data you collect is sent in real torque values.

Accessories are yet another aspect of maintaining accurate and repeatable torque. For example, it is a good idea to keep bits as short as possible, and to replace bits and sockets as they wear. You might not consider a torque arm a necessity on a low-torque application; however, it is one of the most important parts of a low-torque system. The torque arm limits the effect the operator has on the rundown.

One final word to consider: consistency. What we have discussed will get you about 10-15% closer to your goal of accurate and repeatable torque. Keep in mind that around 90% of the energy that goes into running a fastener is used to overcome friction. Within your control, use fasteners of high quality, ensure the parts being assembled are drilled and tapped to high standards, and maintain consistency in the level of lubrication or lack of lubrication on the work and fasteners.

Much thanks to our friends at ASG-Jergens! We look forward to presenting more of your expertise in future Guest Blogs.

EDITOR’S NOTE: QSource.com is currently running ASG’s Free Power Supply Promo. Click here to learn more. Offer valid thru December 31, 2018.

For more information about ASG-Jergens and their wide selection of torque tools and other assembly products, please visit QSource.com. You may also contact us via email or phone at 800-966-6020 and we will be happy to assist you.

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Friday, May 25, 2018

Q Source Will be Closed Monday in Recognition of Memorial Day

Our office will be closed on Monday, May 28, 2018, in recognition of the Memorial Day holiday. We will re-open on Tuesday, May 29th.

We hope you’ll join us in taking a moment to remember the fallen soldiers who have served our country.

Please note: QSource.com is available 24-hours-a-day for product information and purchases. Orders placed on the 28th will be processed on the 29th, or as soon as possible.

Have a safe and enjoyable holiday. We thank you for your continued patronage.

Thank you for reading. Please leave your comments, questions, and suggestions for us by clicking on “Post a Comment.” We also encourage you to share this post via the social media icons below.

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