Category Archives: Surface Engineering
In the diverse and ever-growing world of medical devices, particularly those involving polymeric tubing, it is always crucial, and not always easy, to test and definitively guarantee the adhesion of your bonds and coatings. In the pursuit of bringing solutions to adhesion issues, BTG Labs is proud to be participating in the third annual AMI Medical Tubing Conference where our Custom Applications Scientist and Research and Development Chemist, Elizabeth Kidd, will be presenting the paper “UTILIZING WATER CONTACT ANGLE MEASUREMENTS TO VALIDATE CHANGES IN POLYMERIC TUBING SURFACE CHEMISTRY” on Tuesday, October 2.
Understanding and measuring the surface energy of your device is crucial to ensuring long lasting adhesion. This presentation will walk attendees through:
Partnering with Plastics Technology, BTG Labs held a webinar about a topic that’s attracting a lot of attention.
In the webinar you’ll learn about how blooming can be detrimental to adhesion when bonding, coating, painting and sealing and, in the cases of medical equipment failures, can be a tremendous risk. Dr. Giles Dillingham walks through strategies for detecting, controlling, and avoiding issues associated with blooming using methods like contact angle measurement.
Go here to view the webinar!
On May 21-24, BTG Labs heads back to Long Beach, CA but this time for the SAMPE 2018 Conference & Exhibition.
Recently in Long Beach for AeroDef, one of the aerospace and defense industries’ most widely recognized conferences, BTG Labs now contributes to this tradeshow that features “the latest technologies and research advancements in the industry.” Maybe you’ve heard of a little instrument called The Surface Analyst?
New industry buzzword?
Or a new generation of process and quality control?
Of all the challenges manufacturers face, creating and optimizing critical surface processes for various materials can be very difficult. Traits such as location, size, shape, and texture can add to the challenge. The success of any critical surface process requires an in-line, fast, easy, and accurate verification method.
That’s why more and more manufacturers are turning to the Surface Analyst. Whether it’s bonding, painting, printing, cleaning, coating, or sealing, BTG Labs’ Surface Analyst optimizes critical surface processes and monitors surface treatment on virtually any surface so the product is guaranteed to deliver.
BTG Labs engineered the Surface Analyst to adapt to any application directly on the factory floor. Patented Ballistic Deposition deposits a stream of micro-droplets on the surface; these micro-droplets contain kinetic energy which allows the drops to overcome various textures and different angles without interfering with measurement accuracy. The drop size can also be adjusted so that measurements can be taken on any sized surface from a giant wind turbine to a minuscule medical catheter.
We’re talking about invisible surface chemistry, of course.
“Usually, the customer knows there’s something wrong with the surface, but they don’t know what,” says M&P Engineer and R&D Chemist Brooke Campbell. She and Elizabeth Kidd, our R&D Chemist and custom application scientist combine their analytical expertise with the instruments in our highly sophisticated lab; they evaluate, characterize, and optimize critical surface processes for industries from consumer goods, medical device, aerospace, and everything in between.
Using highly advanced instruments such as the XPS (X-ray Photoelectron Spectroscopy), FTIR (Fourier Transform Infrared Spectroscopy), Instron, goniometer, and of course, the Surface Analyst, the lab performed various tests to evaluate the surface. They then characterize the issue. This usually entails identifying a contamination or an issue with surface preparation. Lastly, they deduce an answer.
In some instances, Brooke explains, the customer has implemented an instrument in their manufacturing processes. All is well until they come across a batch that is out of spec. They know there isn’t a problem with the instrument, but that’s it. So, their puzzle makes its way to the M&P lab for investigation. …Read More
Thanks to advancements in powertrain manufacturing, sealing processes have improved assembly efficiency. Formed-in-place gaskets (FIPG) are replacing traditional mechanical fasteners as they are more cost effective, stronger, and easier to apply. However, adhesive bonding rather than mechanically fastening presents different challenges and requires new protocols.
Lead Sales Engineer Lucas Dillingham has presented “Defining Cleanliness in Powertrain Manufacturing for FIPG Applications,” at several events and automotive factories. BTG Labs works with numerous automotive manufacturers on surface chemical cleanliness and what it means for assembly.
Traditional millipore tests reveal particulate contamination, but on a sealing surface, one must detect chemical contamination. To adhere successfully, surface cleanliness on a chemical level is vital.
A byproduct of automotive manufacturing processes is contaminants that are detrimental to adhesion. Processes entailing unwanted contaminants include:
Last month, Elon Musk announced the availability of Tesla’s new solar roof. These solar roofs are made to masquerade as tasteful, modern shingles; their attractive panels offer roofs from sleek modern to French slate. The solar panels are hidden in a pane of glass which contains a hydrographic coloring–a process that uses water to apply printed designs– to provide texture.
But, these shingles must not only look good, like all solar panels, they must be tough enough to withstand elemental threats.
Wind, rain, snow, sun, extreme temperatures–these are all stresses to any structure, especially solar panels. Because solar panels serve as an energy source, there is no room for failure in the field. The bonds that keep them together such as bonds between dissimilar materials, bonds on low energy polymers, coatings, laminates, and seals, must withstand the stresses as well. That’s why solar panel manufacturers turn to the Surface Analyst.
Manufacturers often encounter a similar puzzle, when cleaning invisible contaminants from a surface, how do you know when the surface is clean; how clean is clean enough? This is a common question that manufacturers ask when preparing their surfaces for bonding, coating, sealing, printing or painting. Until now, there hasn’t been an objective and reliable way to answer this question. Successfully cleaning a surface directly correlates to the adhesive ability of the surface. In order to get something to stick reliably the surface must be clean. How we define that parameter is different for a variety of materials.
For example, you clean your car differently than you clean your dishes. Why? Because a car rides on the road through rain, smog, dirt, maybe mud, and the other is a vehicle for your food.
At BTG Labs, our answer to the “clean enough” question is, “Depends on what you’re doing.” There are dozens of critical surface preparation processes that exist for a number of different applications. A handful include:
- Flame treatment on polypropylene bumpers prior to painting
- Plasma treatment on PET catheters prior to coating
- Hand sanding and solvent wiping on aircraft nut plates before adhesively bonding to composite
- Grit-blasting titanium golf clubs in preparation of bonding to composite
- Corona treatment on film for packaging prior to metallization, lamination, or coating
Manufacturers working with metal and worrying about metal performance are all too familiar with the obstacles that come along with coating, painting, bonding, printing, or sealing it. While the uses of metal in manufacturing are countless and exist in numerous industries, the common denominator is ensuring the appropriate surface cleanliness prior to surface critical processes to guarantee successful adhesion. Common surface cleanliness gauges—dyne inks and water break—are subjective and do not offer quantitative results. Water break can be messy and time consuming and dyne is destructive to the part and dangerous to the user. While these methods can offer some insight into surface cleanliness, they are less than ideal.
BTG Labs Surface Analyst is a fast, easy, accurate, and non-destructive surface cleanliness gauge that tells the user right on the manufacturing floor how prepared the surface is to bond. This hand-held instrument improves surface processes and guarantees a bond will stick. Numerous manufacturers in industries such as consumer goods, automotive, and aerospace, have implemented the Surface Analyst in their specifications to improve their critical metal surface processes. …Read More