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Duct Tape: It’s Not a Case of One-Size-Fits-All

Posted By ASC, Wednesday, October 16, 2019

Duct Tape has earned a permanent place in toolboxes around the world as a universal fix-all. However, with development of the iconic tape over the years leading to variations in its thickness, strength and adhesive properties, it’s fast becoming apparent that one place in the box simply isn’t enough. One size or thickness doesn’t necessarily meet all requirements, and neither do the different adhesives used in them.


Duct tape’s three components, its polyethylene surface, the cloth grid, and the adhesive, which differ from tape to tape, all play roles in determining the perfect match between tape type and substrate, project and environment. Thick tape, while stronger, does not necessarily have the flexibility of thinner tapes, but thinner ones may not be strong enough, or easy enough to work with, to be suitable for use in certain instances. However, the adhesive that is at the core of duct tape’s function is not always optimized to operate on all substrates and in all environments. For instance, some will work better than others in extreme temperatures, but will not necessarily be a good choice for porous substrates, and others may leave a residue.


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US Air Force to make some of its own replacement parts with 3D printing

Posted By ASC, Tuesday, October 15, 2019

The Travis US Air Force Base 60th Maintenance Squadron has taken off in a different direction when it comes to sourcing some of the non-structural aircraft parts needed for aircraft maintenance. Piloting the new approach, which the Air Force reports will speed up the acquisition of necessary components considerably, is a Stratasys F900 3D printer using the Ultem 9085 high-performance thermoplastic.


To kick-start operations, the maintenance squadron used the 3D printing system to make latrine covers for the USAF’s largest aircraft, the transport C-5M Super Galaxy. According to the Air Force, the process, which could have taken as long as a year to accomplish through the normal chain of supplies, was completed in just 73 hours.


While the 60th Maintenance Squadron is currently the USAF’s only unit certified to used the 3D printing system, future plans are to have Travis printing nonstructural parts for other Air Force bases using blueprints developed by the University of Dayton Research Institute.

 

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New Conductive Epoxy for Space-Environment Assembly

Posted By ASC, Thursday, October 10, 2019

Master Bond has expanded its range of adhesives which have passed the NASA low outgassing test with a new two-component silver-filled conductive epoxy, EP21TDCS-LO, aimed at dealing with harsh conditions like temperature and pressure extremes experienced in space-environment assemblies.

 

According to Master Bond, electromechanical assemblies in this sort of environment rely strongly on how robust and reliable the bonds are between conductive components. A bond failure between these components at only one point could spread quickly through the electrical and mechanical systems and endanger both the lives of the crew and the integrity of the spacecraft.

 

The company reports that the development of the EP21TDCS-LO had therefore focused on low volume resistivity; high strength and flexibility in conductive bonds between different materials; and its durability despite the extended thermal, mechanical and electric stress the bond could face if used in space. The polymer system, still workable for about 40 minutes after application, will cure in only one to two hours at 200°F, but take one to two days to do so at room temperature.

 

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H.B. Fuller Streamlines its Adhesives Production Operation

Posted By ASC, Tuesday, October 8, 2019

Operational as an adhesives and sealant manufacturer for almost 130 years, H.B. Fuller, has decided to make a big change as it enters the third decade of the 21st Century by realigning its operations at St Paul’s in Minnesota in order to speed up development and delivery of its wide range of adhesives and sealants.


According to the company, the realignment process involves cutting back on three of the five reporting segments currently controlling the global company’s operations, and adding one new unit. The step, which is to be taken on December 1, will see a new unit, centered on hygiene, health and consumable adhesives, running alongside the construction and engineering adhesives segments which will continue operations in the newly-tweaked operational structure.

 

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AAMA Updates Testing Standards for Adhesive Bonding of SDLs to Glass

Posted By ASC, Wednesday, October 2, 2019

The American Architectural Manufacturers’ Association (AAMA) has taken a new look at its standards with regard to the voluntary testing of adhesive systems used to bond simulated divided lite bars (SDLs) to glass, and has updated the relevant specifications for the first time since 2011.


According to the AAMA the previous rulings requiring only minimum criteria for adhesive systems were reworked, and UV testing references were updated to bring tapes’ peel adhesion requirements in line with liquid adhesive systems, and to clarify how test results were to be reported.


The update specifies that the voluntary tests on standardized SDL bars and substrates must determine the adhesive system’s ability to remain uncompromised from the point of installation through a variety of weathering conditions. However, the association has recommended that the testing process be taken further, and carried out on finishes and materials as and when they are chosen, in order to determine their suitability for specific fenestration projects.

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Do Adhesives Top Fasteners in EV Battery Assembly?

Posted By ASC, Tuesday, October 1, 2019

There are many ways in which adhesives top fasteners in the assembly of EV-batteries. In response to a question asked during its Material Solutions for e-Mobility Webinar regarding adhesives’ benefits over fasteners, adhesive manufacturer Henkel listed the most important of adhesives’ benefits as their distribution of stress, greater part tolerance, and versatility regarding bonding different substrates.


Fasteners concentrate stress at certain points, whereas adhesives spread it along the flange, so strengthening the connection. Adhesives are also more part tolerant, bonding parts with dimensions that differed from assembly constraints, and even filling gaps where necessary. This could not be achieved with fasteners due to their rigidity.


Henkel concluded by highlighting the different substrates like plastics, composites and aluminum involved in EV-battery assembly, which might prove a stumbling block for fasteners, but are easily be bonded using adhesives.

 

Visit the adhesives.org cars, trucks and buses page for additional resources.

 

 

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Wacker to Open Adhesives Tech Center in India

Posted By ASC, Thursday, September 26, 2019

Wacker is to open a new technical center specializing in the development of tile adhesives in Bengaluru, India, to meet the demands of a growing Indian construction industry. This booming sector which currently constructs as many as 11.5 million houses each year, is seen as possibly becoming the third biggest global construction industry within the next five years.


According to the company, this growth, and the increasing demand for customized solutions it generates, gave rise to the need for a regional centre where knowledge could be shared, and standards set for tile adhesives and consultation. The Bengaluru technical center would focus primarily on flexibility and strength in the development of new tile adhesives in order to improve its adherence to substrates, while also providing enough flexibility to prevent breaks and cracks occurring in the tiles themselves.


Success in achieving this, Wacker reported, resulted from the polymeric binders used in the production of its dispersible polymer powder adhesives.

 

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PPG to Partner with DOE in Testing Adhesives for New Breed of Lightweight Vehicles

Posted By ASC, Monday, September 23, 2019

The US Department of Energy (DOE) is to partner with structural adhesives technology company PPG in a project set to use supercomputing in the development of suitable adhesives for use in assembling vehicles using lightweight structural materials to boost energy efficiency.


PPG announced it will collaborate with the DOE’s Lawrence Livermore and Pacific Northwest National Laboratories in developing computer-based models charting the influence of water as a guide to the aging patterns of adhesives designed to bond the lightweight materials currently being considered as possible structural materials for the new breed of energy-efficient vehicles. The materials being considered include aluminum, carbon-fiber composites, magnesium and high-strength steel.


According to PPG, new chemistries would be needed to produce the sort of adhesives required to lessen the chance of corrosion and deal with any thermal expansion problems which can occur when bonding dissimilar materials. Using traditional methods to acquire the necessary knowledge by iterative formulation and testing involves a lengthy process, but PPG reports that computer models, on the other hand, could cut the testing time down by up to 75%, so speeding up vehicle manufacturers’ development programs.

 

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DRT Announces Investments in Two Major Product Lines

Posted By ASC, Thursday, September 19, 2019
Updated: Thursday, September 19, 2019

DRT announced this month that it has planned two large-scale investments in France, which will enable it to facilitate growth in key industry segments and global supply capabilities.


At the French site of Lesperon DRT will build a plant to produce terpene phenolic resins. trade name “Dertophene®”. This will create a second production facility in France, next to the Vielle Saint-Gironslocation. DRT’s total capacity for terpene phenolic resins will increase by more than 50%. The plant is scheduled to be completed by the end of 2020.


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Adhesives Critical to Toxic Lead Cleanup After Notre Dame Fire

Posted By ASC, Thursday, September 19, 2019

Adhesives are playing an important role in combating the toxic fallout of lead particles after a fire in April destroyed the roof and spire of the 850-year-old Notre Dame Cathedral in France which contained about 300 tons of lead. Response teams reacting to the threat created when toxic particles of molten lead showered down on surrounding areas, including schoolyards, turned to adhesive gels to trap the toxic lead particles for later removal and disposal.


According to the Star Tribune, tests on 162 Paris schoolchildren set aside initial belief that the lead would not pose a danger to residents and scholars, by revealing that one local schoolchild was already at risk of lead poisoning, and a further 16 were hovering on the borderline of risk status. To prevent further risk of poisoning, workers wearing protective garments sprayed adhesives on benches, roofs, and an entire school playground area, to absorb and trap the toxic particles. The contaminated adhesive layer would then be removed from benches and roofs once absorption was complete. At the school, the entire top layer of the playground surface was removed and replaced.

 

 

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