The Universal Bonders or: hybrid technology explained

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Like many other human inventions, hybrid adhesives came to be as a reaction to the need or, if you will, a problem that needed to be solved. Generally, in the world of bonding there are two main sides of what adhesives can do. On one side there are instant adhesives, based on cyanoacrylate technology, which are easy to use, bond really fast and are therefore known also in consumer, household use and by do it yourself-ers as the so called super-glue. They have their rightful place also in engineering, due to their safe and simple use, quick curing and high performance on plastics which are nowadays one of the most common materials in industrial use. However, they lack in flexibility and gap filling properties.

On the other end of the scale, are so called structural bonders. In terms of chemistry, they can be epoxy, acrylic, polyurethane, silicone or SMP (silane modified polymer) based. Their strongest traits are, apart from excellent structural performance that gives the range the name, high gap filling properties, excellent performance on metals and environmental durability.

From everything said, it’s fairly obvious that the two ranges of adhesives will be used in practically opposite situations. But naturally, the engineering reality doesn’t always fall into one of these two extremes. There are certainly cases when you might need to fill a small gap, while you still need the adhesive to cure fairly quickly. Plastic does not always get bonded to other plastics, sometimes you need to bond it to a metal or a composite material, and you’ll need your part to be durable and resistant to environmental influences.

This reality is what the chemists in Loctite research & development had in mind when they created the first hybrid adhesive, and later on the entire Universal Bonders range.

Whether you’re looking for an alternative for an epoxy or an acrylic, whether it’s for improving your designs and manufacturing processes or simply in repairs, one of the Universal Bonders is highly likely to fit the bill.

Find out more about Universal Bonders – follow our webinar series!

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We are starting a series of webinars on Universal Bonders for those who want to know more. Starting with those of you out there speaking Slovak.

Webinars in Czech, Hungarian, Polish, Romanian and German will follow so stay tuned! In most cases it will be possible to request a sample or a consultation with a technical expert.

For the webinar in Slovak, you can register here: https://lnkd.in/drvbaaV .

https://lnkd.in/drvbaaV

Adhesive that pulls a train & can bond almost anything!

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Train hybrids blog

Now, I’m absolutely aware that there is probably not one single realistic situation in which you would need to pull a train using a rig which is held together by adhesive. But we did it. Why? Because we can :-)! Don’t take my word for it though – see for yourselves.

And here’s how that was done.

The product that was used is a Universal Bonder, based on Hybrid technology. In adhesive world this means that it combines properties of two chemical components, in this case: cyanoacrylate and methyl methacrylate, and sort of combines the best of both worlds: speed of curing typical for cyanoacrylates and strength and durability typical for MMAs.

It also means that this adhesive has structural and environmental durability, universal adhesion to multitude of substrates and cures fast through high gap, but it is also one of the safest adhesives to handle in terms of minimised health hazards.

More details here.

High Value added defined, or How 25 cents of Loctite saved a $750 Machine

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We have a slogan that goes with our Loctite brand, that says: “We Love Machines. Machines Love Loctite.” And much as it is a feat of marketing messaging, it always puts a big smile on my face when I come across colleagues who live their lives loving the machines that make our lives easier and finding ways to give them some tender, loving care in the form of Loctite.

I owe this story to Steve Rayner, one of our Technical Sales People, a mountain man from British Columbia, Canada. Steve likes getting a good deal as much as the next guy, and this one came out at the top of his list.  He found a barely used Husqvarna brush cutter on Craigslist for $70 (they normally retail for $750 plus tax). The ad listed the cutter as not starting, which Steve found hard to believe. In his own words: Husqvarna’s ALWAYS start! Two-stroke engines are fairly simple, so it could only be a handful of things.

So, he took the machine home, all the while thinking it was a scored cylinder / blown piston rings (one of the most common issues with 2 stroke engines), as it felt like it didn’t have compression.

Taking it apart to examine the piston and cylinder, Steve found that the nut that retains the flywheel to the drive shaft had loosened enough to allow the flywheel to spin free (no evidence of threadlocker was found).  No flywheel meant no spark and consequently: no start.

Instead of buying a new flywheel, Steve pulled out a bottle of Loctite 638 from his Training Kit, applied a thin film to the driveshaft and re-mounted the flywheel (with careful consideration to the alignment). He also used Loctite 248 on the threads on the driveshaft, even though the 638 was more than strong enough to retain the flywheel without the nut.

It runs like a dream now; the weeds in Steve’s yard don’t stand a chance! The best part is: it took less than 25 Cents worth of Loctite to fix a $750 machine! And I got a great story out of it! Thank you, Steve, for sharing!

Anti-slip for conveyor belts

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When we talk about anti-slip coatings, there are usually two possibilities to refer to: pedestrian traffic or vehicular traffic. You won’t hear people talk about the traffic of big plastic bottles in that context very often.

However, that’s the exact slippery traffic that Henkel’s detergent production facility in Vienna had problems with.

Due to high inclination, low friction and high speed of the conveyor belt, the bottles of Weisser Riese detergent were slipping off the belt. This was causing frequent line stops, scrapping costs and additional handling time. Different coatings were tested to prevent this, but usually wore off the belt in just a few days and had to be reapplied.

Finally, Loctite PC 6261 YL was tested. This product is normally used to cover slippery walking surfaces in the industrial environment to prevent accidents and isn’t not usually used on conveyor belts. Still, it proved to be more than effective. Not only does it prevent slipping of the bottles off the belt, but its yellow colour makes it very easily detectable when it wears out in some places and needs to be re-touched. Which won’t be any time soon because the product itself was designed to withstand much more impact than it’s subjected to on the conveyor belt.

The glue that holds even when you crash!

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Unless you’re directly involved in manufacturing of cars, even as an engineer you probably rarely think about how much adhesive there is on an average car and what kind of crucial roles it plays.

Within the EU, all new cars must comply with clearly defined safety standards during crash tests. One of the scenarios simulated during these tests is the so-called frontal offset crash, which is responsible for more deaths and serious injuries than any other type of accident. The NCAP ‏(New Car Assessment Program) stipulates that the car collision must be tested and analysed at a speed of 64 km/h and an offset rate of just 40 percent against a deformable barrier. A test has recently been made according to the same parameters, with a used car, to determine exactly how safe it remains after its windscreen has been replaced using the direct glazing adhesive Teroson PU 8730 HMLC.

The test was done in cooperation with an independent facility: crashtest-service.com ‏(CTS) in Münster Germany. Before the test, the guests witnessed the replacement of the windscreen. 30 minutes after the windscreen was bonded – which is the specified drive away time for Teroson PU 8730 HMLC – the test was performed immediately.

The main objective of the test was to show the importance of the windscreen during frontal collisions, because it contributes to vehicle rigidity and supports the passenger airbag in a crash. If the adhesive which holds the windscreen onto the car body failed during the crash, this rigidity, and with it also the functionality of the airbag, would be compromised.

In this case the windscreen bonded with Teroson adhesive, not only withstood the extreme crash test conditions, but also delivered the measured values required for the full functioning of the passenger airbag.

The things you don’t see on the football field

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There’s probably very few people in this world who haven’t spent at least a minute in the past weeks watching football championship matches, or at least catching the day’s summary on the news in the evening. A rather painful moment for me to be writing this, being German. And, to add insult to injury, my wife happens to be Mexican! Yes: ouch!

Nevertheless, it’s not the sports results I wanted to talk about here (clearly!). There are many different factors that have to come together and work properly for the championship to be a success. I bet you’re guessing this has to do with adhesives.

To begin with – the ball. Nothing would be possible without is. The ball used to be sewn by hand, joining together different elements over two layers of lining. Nowadays, it’s produced of fewer individual parts bonded by special adhesives. That makes it lighter, more aerodynamic and less permeable to water when it rains.

The gear that the players use to be both: light on their feet and protected in duels that sometimes happen on the field, must be of top quality and super reliable. Use of adhesive made it possible for the cleats to be lighter, more flexible and follow the players movement more closely, while the shin guards now adapt to the shape of the leg much better and pinch much less.

And that’s only the elements involved in the game directly. There is a number of other objects indirectly involved that benefit from the use of adhesive, like the stadium itself (flooring, walls and ceiling installations), floodlights, other lighting systems and various displays as well as the very buses on which the teams are transported from their accommodation to the stadium.