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GUILL ANNOUNCES NEW 800 SERIES HYBRID EXTRUSION TOOLING

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GUILL ANNOUNCES NEW 800 SERIES HYBRID EXTRUSION TOOLING

Guill announces the introduction of a new version of its popular 800 series, known as 800 Series Hybrid. In some extrusion applications that utilize crossheads and inlines, layers of the exact same material are applied multiple times, using a single die. This method is used to reduce the propensity for errors caused by gels breaking through a thin wall, weld lines, inconsistent wall thickness, plus material and process variations.

Additional errors include difficult-to-process materials and demanding applications where there is zero fault tolerance. Seeking to design the next generation multi-layer die to overcome these challenges, the engineers at
Guill looked for a way to incorporate this technology into an updated version of the 800 Series. This led
to the creation of the 800 Series Hybrid. The inherent benefits of the 800 Series are retained, including
compact design, low residence time and a common deflector bore that eliminates tolerance stack up.

The challenge was to create a hybrid design that incorporates the benefits of layer overlapping while reducing unnecessary complexity and making the technology more cost-affordable for customers. This was achieved by overlapping layers in each semi-deflector, using a single cone. The highly efficient design of the 800 Series Hybrid reduces cost and size, as opposed to other methods of overlapping layers.


Essential benefits of the 800 Series Hybrid include eliminating weld lines in materials through patented
overlapping technology, producing a more consistent finished product; reduced sensitivity to changes in
viscosity; reduced sensitivity to changes in line speed; myriad material and multi-layer application
possibilities; works in all tubing and jacketing applications with a wide range of materials; low residence
time; compact design and a low tolerance stack-up error factor, all resulting in improved concentricity.

The 800 Series Hybrid extrusion tool greatly reduces stagnation, because overlapping layers are more
inherently balanced than single layers and also because each semi-deflector is “tuned to flush.” Conventional deflectors must simultaneously achieve a balance between flushing, balancing, and eliminating the weld line. There is less difference between the slowest moving material and the fastest moving material in the deflector channels, thus making the viscosity more consistent in the deflector.

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OCS presents product solution to reduce scrap, rework and machine downtime at ICE Europe in Munich

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OCS presents product solutions to reduce scrap, rework, and machine downtime at ICE Europe in Munich

After canceling last year’s show, OCS will present expert solutions for quality control and assurance at ICE Europe from 15 to 17 March 2022 in Munich, Hall A6, Stand 756. Live demonstration at the show: The innovative and customized Web Inspection System FSP600. The event brings together professionals from across the converting industry for networking, knowledge sharing, and innovation topics.

Real-time inspection using a high-speed camera
The OCS FSP600 Wide-Web Inspection System is able to recognize every type of irregularity in films, laminates, and non-wovens in real-time. This is all made possible by a special high-speed camera that is capable of recognizing gels, black specks, burn marks, fisheyes, holes, wrinkles, scratches, coating defects, water droplets, oil stains, insects, bubbles, nozzle marks, and craters – as well as many other defects and irregularities. An especially practical feature: real-time results data are transferred directly to production and process control.

Innovative MCE technology in use
With the smart and innovative MCE (Multi-Channel Evaluation) technology, detection in reflected or transmitted light mode as well as in dark and bright field applications can be combined, and all this with one hardware (camera). This enables the simultaneous detection of defects on up to 6 channels.

For example, one channel for the reflection of surface defects, three additional channels for transmission (red, green, and blue =RGB) for better defect detection and classification. Defect references are learned with the help of the teach-in function, standardized classification of the film rolls (calculation of grades) can be made.

Industry 4.0 – Significant time and cost savings
The machine operator is informed in good time about process fluctuations and can counteract quality variations. Each roll change is automatically stored and noted with the respective roll number. Seamless traceability is ensured and assists in gaining knowledge. Rolls of the film can be automatically locked by the system without operator intervention.

This is made possible by OCS analysis software, which correlates the material, raw material, and process parameters from the PDA system with the respective quality/film note and thus provides long-term statistical process control. This helps preventively to reduce scrap, rework, and machine breakdowns. It is no wonder that countless high-profile film manufacturers and other companies in the plastics processing industry have decided to entrust their products to the outstanding quality control offered by the use of the OCS FSP600 Wide-Web Inspection System.

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DSM Engineering Materials takes next step in making electric mobility safer, lighter and more sustainable

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DSM Engineering Materials takes the next step in making electric mobility safer, lighter, and more sustainable

Today, DSM Engineering Materials announces it has taken the next important step on its journey to making electric vehicles safer, lighter, and more sustainable by expanding its comparative tracking index (CTI) test laboratory to meet the next-generation, high voltage requirements of its customers.

This move builds on a long track record of working with automotive tiers and OEMs and leverages its leadership position on sustainability as well as its strong credentials in the automotive, electrical, and electronics industries. By installing the industry’s most advanced CTI test capabilities, it is now enabling a new standard to support manufacturers in increasing the voltage of EV batteries safely and shortening charging times even further to help accelerate the shift to electric mobility.

Driven by growing consumer demand, regulatory pressure, and technological advances, the transition to electric mobility is accelerating and is forecast to accelerate further. However, long charging times remain a key barrier to the wider adoption of electric vehicles (EVs).

Shortening these charging times requires higher battery voltages up to 1,000V or above. To enable this ultra-fast charging at the right safety and reliability levels, manufacturers will need to use insulation plastics with better resistance to high voltages.

DSM Engineering Materials has already established a portfolio and approach to making electric vehicles safer, lighter, and more sustainable:

  • Safety: Leveraging its expertise in critical applications, DSM Engineering Materials is ensuring that key future mobility systems – like the e-powertrain, connectivity, tanks, and structural parts – are made with the most reliable, material solutions that meet or exceed applicable standards while at the same time reducing the carbon footprint of the component.
  • Lightweighting: DSM Engineering Materials has extensive expertise making structural parts, including actuation systems and seating materials, lighter with ForTii® PA4T PPA and Akulon® PA6 and PA66 PAs, offering best-in-class strength and thermal performance for metal replacement.
  • Sustainability: As a sustainability leader, DSM Engineering Materials has communicated its bold ambition to reduce its total greenhouse gas emissions and the carbon footprint of its products by 50% by 2030, from a 2016 baseline, and developing and rolling out bio- and/or recycled-based alternatives for its entire portfolio by 2030. Specific grades are already available for all major product lines.

Now, in line with its EV-focused automotive strategy, DSM has expanded its CTI test laboratory with equipment to validating tracking resistance to voltages up to 1,500V AC and 1,000V DC. High-voltage component manufacturers have shown significant interest in collaborating with DSM on this testing for voltages between 600 and 1,500V.

Franz Janson, Principal Product Development Engineer, PEE Global Automotive Resin Material Platform at TE Connectivity, one of the world’s largest connector manufacturers: “We are very happy to see that DSM is investing in strong materials as well as the right test laboratory. We look forward to cooperating more closely to understand the impact of high-voltage exposure on material properties and to implement suitable materials for our next-generation high-voltage systems.”

Jud Gibson, Global Vice President of Sales & Marketing at DSM Engineering Materials: “To introduce such an advanced electrical test laboratory enabling CTI characterization is a key milestone for DSM and an industry first. We’re proud to be using this technology to make electric cars safer, lighter, and more sustainable – not only for today’s customers but also for generations to come.”

http://www.dsm.com/

 

Clariant launches 100% bio-based surfactants range driving the transition towards renewable carbon

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Clariant launches 100% bio-based surfactants range driving the transition towards renewable carbon

Driving change. Clariant today unveils its new Vita 100% bio-based surfactants and polyethylene glycols (PEGs) to help directly address climate change by helping remove fossil carbon from the value chain.

As our climate gives us increasing and alarming signals of change, individuals and industries are looking for ways to reduce their environmental footprints, and the demand for bio-based chemicals is set to grow strongly in the coming years. Clariant is committed to fostering the transition to a more sustainable economy and has a growing share of bio-based products and processing aids in its portfolio.

The introduction of 100% bio-based surfactants and PEGs significantly expands Clariant’s Vita-designated ingredients. Vita products are based on renewable feedstocks and have at least 98% Renewable Carbon Index (RCI). It is just one example of its commitment to provide low carbon footprint solutions to customers and to Greater Chemistry – between people and the planet.

“From the packaging to the many ingredients, a typical consumer product in coatings, personal care, home care, industrial, and agricultural applications still uses petrochemicals and therefore fossil carbon,” said Christian Vang, Global Head of Business Unit Industrial & Consumer Specialties, Clariant. “Switching to bio-based carbon chemistry remains a big challenge for manufacturers and by launching the Vita surfactant and PEG range we are offering them an important new solution to achieve this.”

Designed for natural formulations targeting a high Renewable Carbon Index (RCI), the new Vita products support manufacturers in maximizing the bio-based carbon content of consumer goods such as detergents, hair and body shampoo, paint, industrial lubricants, and crop formulations.

Clariant uses 100% bioethanol derived from sugar cane or corn to create ethylene oxide for its innovative new surfactants and PEGs. The bio-based material is fully segregated along the value chain from the field to the final consumer product.

Because only bio-based feedstocks are used, the ingredients have significantly lower carbon footprints than their fossil-based counterparts. The Vita surfactants are CO₂ emissions savers: they can help save up to 85% of CO₂ emissions compared to their fossil analogs.

Importantly, in addition to setting the standard in a greener production, these new solutions are chemically equivalent to Clariant’s fossil versions, offering the same performance and efficiency to formulators and brand owners. Customers can currently benefit from more than 70 bio-based products, and the range will continue to be expanded to meet evolving market needs. In Q1 2022, double-digit kilotons of the bio-based surfactants and PEGs will be available for the worldwide business segments from Clariant IGL Specialty Chemicals (CISC), a Clariant joint venture.

As one of the global leaders in specialty chemicals, and a member of the UN Global Compact, Clariant is at the forefront of advanced carbon solutions with a unique level of expertise, know-how, and industry knowledge. Find out more about the new Vita range of surfactants for natural formulations or discover how Clariant is part of driving change in a changing world through its company-wide sustainability strategy.

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New lightweight material is stronger than steel

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 New lightweight material is stronger than steel

Using a novel polymerization process, MIT chemical engineers have created a new material that is stronger than steel and as light as plastic, and can be easily manufactured in large quantities.

The new material is a two-dimensional polymer that self-assembles into sheets, unlike all other polymers, which form one-dimensional, spaghetti-like chains. Until now, scientists had believed it was impossible to induce polymers to form 2D sheets.

Such a material could be used as a lightweight, durable coating for car parts or cell phones, or as a building material for bridges or other structures, says Michael Strano, the Carbon P. Dubbs Professor of Chemical Engineering at MIT and the senior author of the new study.

“We don’t usually think of plastics as being something that you could use to support a building, but with this material, you can enable new things,” he says. “It has very unusual properties and we’re very excited about that.” The researchers have filed for two patents on the process they used to generate the material, which they describe in a paper appearing today in Nature. MIT postdoc Yuwen Zeng is the lead author of the study.

Two dimensions

Polymers, which include all plastics, consist of chains of building blocks called monomers. These chains grow by adding new molecules onto their ends. Once formed, polymers can be shaped into three-dimensional objects, such as water bottles, using injection molding.

Polymer scientists have long hypothesized that if polymers could be induced to grow into a two-dimensional sheet, they should form extremely strong, lightweight materials. However, many decades of work in this field led to the conclusion that it was impossible to create such sheets. One reason for this was that if just one monomer rotates up or down, out of the plane of the growing sheet, the material will begin expanding in three dimensions and the sheet-like structure will be lost.

However, in the new study, Strano and his colleagues came up with a new polymerization process that allows them to generate a two-dimensional sheet called a polyamide. For the monomer building blocks, they use a compound called melamine, which contains a ring of carbon and nitrogen atoms. Under the right conditions, these monomers can grow in two dimensions, forming disks. These disks stack on top of each other, held together by hydrogen bonds between the layers, which make the structure very stable and strong.

 

“Instead of making a spaghetti-like molecule, we can make a sheet-like molecular plane, where we get molecules to hook themselves together in two dimensions,” Strano says. “This mechanism happens spontaneously in solution, and after we synthesize the material, we can easily spin-coat thin films that are extraordinarily strong.”

Because the material self-assembles in solution, it can be made in large quantities by simply increasing the quantity of the starting materials. The researchers showed that they could coat surfaces with films of the material, which they call 2DPA-1.

“With this advance, we have planar molecules that are going to be much easier to fashion into a very strong, but extremely thin material,” Strano says.

Light but strong

The researchers found that the new material’s elastic modulus — a measure of how much force it takes to deform a material — is between four and six times greater than that of bulletproof glass. They also found that its yield strength, or how much force it takes to break the material, is twice that of steel, even though the material has only about one-sixth the density of steel.

Matthew Tirrell, dean of the Pritzker School of Molecular Engineering at the University of Chicago, says that the new technique “embodies some very creative chemistry to make these bonded 2D polymers.”

“An important aspect of these new polymers is that they are readily processable in solution, which will facilitate numerous new applications where a high strength to weight ratio is important, such as new composite or diffusion barrier materials,” says Tirrell, who was not involved in the study.

Another key feature of 2DPA-1 is that it is impermeable to gases. While other polymers are made from coiled chains with gaps that allow gases to seep through, the new material is made from monomers that lock together like LEGOs, and molecules cannot get between them.

“This could allow us to create ultrathin coatings that can completely prevent water or gases from getting through,” Strano says. “This kind of barrier coating could be used to protect metal in cars and other vehicles, or steel structures.”

Strano and his students are now studying in more detail how this particular polymer is able to form 2D sheets, and they are experimenting with changing its molecular makeup to create other types of novel materials.

https://web.mit.edu/

XSYS to demonstrate full flexo portfolio at INFOFLEX 2022

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XSYS to demonstrate full flexo portfolio at INFOFLEX 2022

 XSYS is pleased to announce its participation at INFOFLEX 2022 on March 14 and 15. Visitors to the Fort Worth Convention Centre, in Texas, will be able to discuss the latest solutions in flexographic printing plates, plate-making equipment, and sleeves and adapters with the experts on the XSYS booth #415.

The innovative nyloflex  Xpress Thermal Processing System F IV which provides better and more consistent quality, faster production, and easier handling of flexo plates will be on display. This has proven to reduce press downtime by getting plates ready for printing in less than 60 minutes, which in turn meets brand owners’ requirement for faster time to market. Furthermore, nylon flex   Xpress offers a reduction in energy usage and costs of up to 94% compared to solvent processing.

“With print quality that rivals solvent plates, reduced Total Cost of Ownership (TCO), and more environmentally friendly production, the nylo flex  Xpress Thermal Processing System is a real game-changer for flexographic printers,” said Eric Gibbs, Site Director Plates & Prepress North America at XSYS. “Solvent-free is the way to answer demands for more sustainable production of labels and flexible packaging. And not only does this thermal technology lower the impact on the environment, but it also increases health and safety for operators.”

The experts will also be available to advise customers in their choice of flexographic printing plates for all
applications from tags, labels to flexible packaging. For platemakers, there will be the chance to learn how the ThermoFlexX portfolio of imagers, Catena plate processing equipment, and Woodpecker surface screening are increasing OEE in pre-press and producing very consistent plates at a lower cost.

From the ever-expanding rotec  adapters and sleeves line, visitors will have the opportunity to experience
the revolutionary rotec High-Performance Sleeve, which provides printers the benefit of bounce reduction and higher press speeds, lower weight, and easier sleeve mounting along with the rotec  Eco Bridge which enables easier and faster sleeve mounting with more efficient compressed air usage.

Organized by the FTA, the two-day event has a long history of bringing together the flexo community, and
this year marks the 40th edition. “The INFOFLEX exhibition has always been central to our industry, but
now more than ever, it will bring our community back together again. We see it as a great opportunity to
reinforce our existing customer relationships and to build new ones for the future, as XSYS continues to
innovate in the flexo space and bring more brilliance into the lives of flexo printers,” concluded Dan Rosen, Director National Accounts at XSYS.

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Waste management system from “Matho” Germany installed at Renault

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Waste management system from “Matho” Germany installed at Renault

Recognizing the imperative need to manage self-adhesive label waste more effectively, Palghar based Renault Paper Products Private Limited led by Mahendra Shah has installed a waste managing system supplied by MATHO Konstruktion & Maschinenbau GmbH, Germany.

Renault, established in 1999 and operating out of 22000 square feet shopfloor with nine label presses has steadily expanded by adding label embellishing capabilities to become a specialized supplier to the liquor industry besides having a host of customers from the leading FMCG brand owners. They have a range of high-end flexo and hybrid presses.

 

They are one of the first to have a combination label press that can produce labels with diverse technologies like Offset, Flexo, Screen printing in a single pass along with capabilities to foil and emboss. On installation of Matho, Mahendra comments, “In today’s time a clean shop floor makes the workplace more productive and space-saving does provide additional area for expansion”.

Leading label producing companies understand and try to implement the need for a cleaner and green workplace. Environmentally and socially responsible manufacturers of self-adhesive label material or converters of labels simply do not wish to dump their production waste as garbage, in open or covered spaces. Label waste matrix stripped off after die-cutting has tacky adhesive on it and is voluminous.

It attracts dust and bacteria so is a health hazard and also occupies expensive space that can be used for productive purposes. German manufacturers Matho offers waste management systems to extract the trims and matrix by suction from the slitting machine or die-cutting station to transport the main equipment to shred the self-adhesive waste without letting it stick to the sides and clogging the pipes and further blow it on to either collection bags in highly reduced space or compact it for easy disposal.

MATHO Konstruktion & Maschinenbau GmbH is a leading manufacturer of granulators and waste extraction systems for the packaging, converting, and labels industry. Headquartered in Ellwangen, Germany, and with more than 25 years of experience, the company focuses on the entire waste handling process. Their focus includes project planning, manufacturing, installation, and commissioning of waste extraction systems.

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Ensinger acquires the StyLight thermoplastic composite business from INEOS Styrolution

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Ensinger acquires the StyLight  thermoplastic composite business from INEOS Styrolution

Ensinger and INEOS Styrolution announced the joint agreement today that Ensinger has acquired the StyLight thermoplastic composite materials business of INEOS Styrolution.

The acquisition adds an exclusive SAN-based product range to Ensinger’s comprehensive thermoplastic composite portfolio. SAN-based products bring many new thermoplastic composite possibilities to the market such as carbon, glass, and natural (flax) based fibre products for aesthetic materials, semi-structural, and over-molding applications to name a few.

INEOS Styrolution developed and successfully launched the innovative StyLight product line at the K Show in 2016. Since then, the new solution has triggered a lot of interest and business with many customers across a range of industries.

“The business continues in Ensinger’s experienced hands, serving the existing customer base and seeking future growth potential to enhance the Company’s current position in the international thermoplastic composites market”, says Daniel Grauer, International Business Development Manager, Ensinger Composites, who will be the primary contact for all sales and customer inquiries.

Ensinger has rebranded StyLight to its thermoplastic composite materials brand TECATEC, to align seamlessly with its current product offerings to the international market.

“The addition of the INEOS Styrolution StyLight business is the next strategic building block in Ensinger’s journey to becoming one of the only manufacturers able to offer the complete value chain of thermoplastic composite products”, says Ralph Pernizsak, Managing Director, Ensinger Group.

“We are pleased to come to this agreement. We are convinced that these innovative composites have a bright future ahead and we are certain that Ensinger is the ideal new home for this product line. We encourage our customers to continue working with Ensinger on their projects as they have previously with us”, adds Pierre Juan, Director Technical Product Management Specialties EMEA, previously leading the StyLight business at INEOS Styrolution.

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Scientists Develop Recyclable Plastics Based on Sugars

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Scientists Develop Recyclable Plastics Based on Sugars

Researchers from the University of Birmingham, U.K., and Duke University, U.S., have created a new family of polymers from sustainable sources that retain all of the same qualities as common plastics but are also degradable and mechanically recyclable.

The scientists used sugar-based starting materials rather than petrochemical derivatives to make two new polymers, one which is stretchable like rubber and another which is tough but ductile, like most commercial plastics.

The researchers made the new polymers using iodide and isomannide as building blocks.  Both these compounds are made from sugar alcohols and feature a rigid ring of atoms.  The researchers found that the suicide-based polymer showed a stiffness and malleability similar to common plastics, and a strength that

is similar to high-grade engineering plastics such as Nylon-6. Despite suicide and isomannide only differing by the 3D spatial orientation of two bonds, known as stereochemistry, the isomannide-based material had similar strength and toughness but also showed high elasticity, recovering its shape after deformation. Notably, the materials retained their excellent mechanical properties following pulverization and thermal processing, which is the usual method for mechanically recycling plastics.

Cutting edge computational modeling simulated how the polymer chains pack and interact to produce such different polymer properties. The unique 3D shapes of the sugar derivatives facilitate different movements and interactions of the long chains causing the huge difference in physical properties that were observed.

By creating copolymers that contain both iodide and isomannide units, the researchers found that they could control the mechanical properties and degradation rates independently of one another. Hence, this system opens the door to using the unique shapes of sugars to independently tune the degradability for a specific use without significantly altering the properties of the material.

The chemical similarity of the polymers means that, unlike a lot of current commodity plastics, they can be blended to yield materials with comparable or improved properties.

Dr. Josh Worch, from Birmingham’s School of Chemistry, and a co-author in the research said: “The ability to blend these polymers to create useful materials, offers a distinct advantage in recycling, which often has to deal with mixed feeds”.

Dr. Connor Stubbs, also from Birmingham’s School of Chemistry, added: “petrol-based plastics have had decades of research, so catching up with them is a huge challenge. We can look to the unique structures and shapes that biology has to offer to create far better plastics with the same expanse of properties that current commercial plastics can offer”

Duke University professor Dr. Matthew Becker said: “Our findings demonstrate how stereochemistry can be used as a central theme to design sustainable materials with what truly are unprecedented mechanical properties.”

Professor Andrew Dove, who led the research team from Birmingham, noted: “This study shows what is possible with sustainable plastics. While we need to do more work to reduce costs and study the potential environmental impact of these materials, in the long term it is possible that these sorts of materials could replace petrochemically-sourced plastics that don’t readily degrade in the environment.”

A joint patent application has been filed by the University of Birmingham Enterprise and Duke University.  The researchers are now looking for industrial partners who are interested in licensing the technology.

https://otc.duke.edu/

Polymer upcycling of common plastic adds toughness, recyclability to structural adhesives

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Polymer upcycling of common plastic adds toughness, recyclability to structural adhesives

Researchers at the Department of Energy’s Oak Ridge National Laboratory used polymer chemistry to transform a common household plastic into a reusable adhesive with a rare combination of strength and ductility, making it one of the toughest materials ever reported.

Fundamentally advances pathways to design a new class of tough adhesives with desirable features merged into a single material. The technology adapts to bear heavy loads, tolerates extreme stress and heat, and reversibly bonds to various surfaces including glass, aluminum, and steel.

“Strong, tough adhesives are difficult to design because they need to incorporate hard and soft features that are not typically compatible,” said ORNL scientist and corresponding author Tomonori Saito. Structural adhesives such as epoxy are largely designed for load-bearing strength but lack toughness, a property that helps materials dissipate stress when pulled or stretched to prevent sudden failure.

“The challenge has been to add the toughness you get inflexible materials without sacrificing strength. Our approach uses dynamic chemical bonds to develop a novel adhesive with remarkable properties not seen in current materials,” Saito said.

Researchers aimed at upcycling a commodity thermoplastic, polystyrene-b-poly(ethylene-co-butylene)-b-polystyrene, or SEBS, a rubbery polymer material that is easy to process but not engineered for tough adhesion. The goal of upcycling is to add value to common plastics produced in high volume for general and often disposable applications, such as food containers, toys, and household items.

The team modified SEBS’ chemical structure with dynamic crosslinking to make it more robust, as well as to create reuse pathways for plastics, beyond traditional recycling, that enhance their performance for new and specialized applications.

Crosslinking is a known strategy for designing materials with more stable properties. The approach can create a bridge between structures that are not normally compatible. In the study, boronic esters were used to couple SEBS with silica nanoparticles, or SiNP, a filler material used to strengthen polymers. The combination yields a novel crosslinked boronic ester-SiNP composite material.

Conventional crosslinking typically results in permanent bonds that prevent adhesives from being removed or reprocessed. The study found that boronic esters enable “dynamic” or reversible crosslinking and are key to the new material’s strong adhesion as well as recyclability. These unique chemical compounds can create stable bonds that can make and break repeatedly – an unusual feature that makes them attractive for sustainable materials design.

“A fundamental discovery was that the boronic esters on SEBS can rearrange bonds with hydroxyl groups – oxygen and hydrogen – on SiNP to adapt properties for demanding jobs. We also found the formation of similar reversible boronic ester bonds with a variety of surfaces that have the hydroxyl groups,” said lead author Md Anisur Rahman, who works with Saito in ORNL’s Chemical Sciences Division.

This two-fold finding was observed experimentally and computationally by density functional theory.

Results showed crosslinked bonds shift within the material to enable specific properties and adhere to surfaces so strongly that a thin square centimeter can hold roughly 300 pounds. Shear tests that measure toughness by trying to detach materials with force were off the charts, widely exceeding all commercial adhesives tested in the study. The material was so tough in adhering to glass, in fact, that glass fractured before the sample debonded. The approach also enhanced thermal stability to 400 degrees Fahrenheit, making the adhesive attractive for ambient and high-temperature applications.

In addition to extraordinary adhesion, a surprising property of the tough material is that it can also be recycled. “It is rare for a high-performance adhesive to be removable, but ours is designed for reuse and recyclability,” Rahman said. “It can be applied and detached with heat and pressure and reused several times.”

The development widens applications for aerospace, automotive, and construction adhesives. “There are benefits to industry and the environment to save resources and reduce waste. By design, this adhesive allows you to make repairs or correct costly mistakes and can be reprocessed for new uses in very challenging applications,” Saito said.

The team plans to commercialize the technology and is exploring dynamic crosslinking with other fillers to develop tough adhesives optimized for specific bonding surfaces and functionalities.

https://www.ornl.gov/

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