Aircraft Structural Adhesive - Adhesive Technologies – a leader in structural adhesives and surface treatments for the global aerospace OEM and MRO industry – recently developed Loctite EA 9365FST, a new two-part epoxy adhesive that reinforces and bonds thermoplastic and thermoset substrates and can act like Fibrex. For hardening thin walls of thermoplastic assemblies. Formulated for use in aircraft interiors, the halogen-free and antimony-free adhesive meets industry requirements for fire resistance, smoke density and toxicity (FST), is globally REACH and EH&S compliant, and qualified to Boeing's BAC 5568 process specification.
Loctite EA 9365FST cures in just 2 hours at 70°C (158°F) or 7 days at room temperature. Adhesives provide good mechanical properties when properly cured thermoplastics and thermosets are bonded to other substrates. This user-friendly epoxy offers an excellent balance between adhesion and FST compliance. The product is designed to not yellow over time and is paintable, providing better color performance with less glare than older adhesive formulations.
Aircraft Structural Adhesive
When used as a matrix resin, Loctite EA 9365FST readily wets fiberglass to reinforce thin thermoplastic walls for improved structural support in interior applications including wall, ceiling and floor panels; compartment and storage space in the cabin; kitchen; Toilets and seats. The product is available worldwide and has targeted applications in commercial aviation, defense and rail.
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"Loctite EA 9365FST is a high-tech FR and FST qualified technology that expands an already strong portfolio of paste adhesives," explained William Smoot, Technical Account Manager at Adhesive Technologies. “This product answered a need in Boeing and the aerospace and rail industries for critical flame retardant, toxicity and smoke suppression adhesives for cabin interiors. Product safety and durability are increasingly important. This product is sustainable and REACH compliant, contains no halogens or other hazardous chemicals.” Join our community and receive the latest aerospace insights, trends and innovations straight to your inbox.
Airlines require high-quality aerospace structural adhesive solutions for aircraft structural materials, parts and engines to ensure a safe and reliable fleet. From aerospace composites and metal bonding adhesives to surface preparation and light impact protection materials, manufacturers have a wide range of requirements for aircraft production.
As a proven structural adhesive solutions provider, Henkel offers a comprehensive product portfolio across the entire aerospace supply chain. These include films, adhesive pastes, mold release agents, primers, syntactics, core fillers, casting and sanding products. All primary and secondary structural components of Henkel aircraft are designed by experts with many years of experience in the field of aviation. Additionally, as a leader in sustainable development best practices, Henkel offers environmentally friendly product options for leading aerospace platforms.
Our broad portfolio of aerospace structural adhesives includes advanced technologies to address today's and tomorrow's most demanding applications. As a long-term partner to aircraft manufacturers worldwide, Henkel provides durable adhesive solutions and airframe materials that improve aircraft performance and safety, as well as manufacturers' production efficiency. This includes a wide range of aircraft structural adhesives specifically designed for high performance applications in the aerospace industry.
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As composite frames became more important in the aerospace industry, composite materials for aircraft structures became more advanced. To protect the structural integrity of critical aircraft components, manufacturers need adhesives that provide strong bonds between composite subcomponents with excellent chemical resistance and exceptional mechanical performance. LOCTITE
Aerospace composite bonding products meet all these requirements and enable engineers to create strong and efficient aircraft structures.
Fasteners are not required, our adhesives for bonding composites have a low adhesive thickness, which allows you to take full advantage of the stiffness properties of composites and ensures the separation of different materials.
In the Honeycomb and Metal Assembly segment, Henkel offers metal adhesive films for core building and repair that are suitable for all major aerospace requirements. LOCTITE
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The film is a material, heat-cured thin-layer adhesive. These materials are designed for maximum durability, high strength and stiffness with temperature resistance specifically designed for their working environment.
There are two main methods of creating an adhesive bond on the surface of pre-cured carbon fiber composites: surface rubbing and the use of a release fabric, ie. Peel ply is the recommended process because it results in a more uniform surface preparation than hand or machine sanding.
Peel ply ensures long life of parts and reduces maintenance costs. This provides a consistent bonding surface with a high quality bond for today's advanced composite materials.
Protecting aircraft from lightning strikes requires special materials that are applied to the surface of the aircraft. Surface treatment films are designed to improve the surface quality of composite honeycomb parts. They provide a barrier for various materials, reduce surface preparation time and protect structural fibers. LOCTITE
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Light impact protection materials are applicable to both composite and carbon fiber aircraft. In addition, laminated foils consisting of a surface foil and a conductive metal foil protect the composite structure of aircraft parts from lightning strikes.
Portfolio, get the most advanced solutions. From an economic point of view, they offer up to 30% weight savings compared to existing foils for surface treatment. LOCTITE
Aircraft surface films also reduce the cost of finishing composite parts. Technically, they provide durable, high-quality paintable surfaces and increase product and trade flexibility.
Aircraft structural paste adhesives are used to bond aluminium, stainless steel, titanium and composites in ribbed or honeycomb shapes. Henkel offers the aircraft structural adhesive solutions you need: one- and two-component epoxy paste adhesive systems for casting, gluing, bonding and repair in a variety of packaging from a pudding cup to a two-part cartridge set with a static mixer.
Design And Ageing Of Adhesives For Structural Adhesive Bonding
For high temperature, wet layup, composite construction or repair, such as in aerospace applications, a low viscosity system is required. This system must support both the wet lamination process and curing outside the autoclave. Henkel offers a complete solution for surface preparation of carbon laminates. Our LOCTITE
Low viscosity wet laying solutions cure very quickly under heat and provide an optimal adhesion surface for subsequent painting and coating.
Whenever there are gaps and differences between two composite parts, solid and liquid shims are used to eliminate them. Liquid washers are usually used to fill gaps smaller than 3mm or to fit wider areas. They are arranged on one side of the ribs, pressed together and fixed. This forces any excess shim material to be extruded, leaving the required amount of shim to fill any gaps created in the manufacturing process.
Liquid washers are epoxy-based materials that offer not only high compressive strength, but also a balance between exposed assembly time and strength.
Adhesives, Sealants And Coatings For Aerospace Applications
For airplanes, a fire outbreak is one of the most dangerous events. By using the appropriate flame retardants resistant to fire, smoke and toxicity (FST) on honeycomb panels for edge sealing, insert bonding or watering, OEMs and aircraft repairers can better protect their aircraft.
Henkel has developed special flame retardant products for use in aircraft interiors. They are hardened paste adhesives with higher delivery rates and higher compressive strength. LOCTITE
In order to reduce the weight of the primary and secondary structural components of the aircraft, a honeycomb core structure is used between the layers of thin outer walls to provide the necessary rigidity and strength. These honeycomb sandwich panels are used throughout the aircraft, in primary, secondary and interior structures. Where additional reinforcement and, above all, compressive strength is required, filling compounds are used to fill the voids between the honeycomb core and to seal the edges.
As a world leader in adhesives, Henkel offers a wide range of potting, edge filler and encapsulation compounds for use with a wide variety of substrates, operating temperatures and other environmental factors. Henkel's aerospace portfolio provides manufacturers with honeycomb beading and sealing requirements, a range of products that meet critical performance criteria and are easy to apply and store.
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Potting compounds are available in one-component and two-component systems in low to medium concentrations and syntactic formulations. Syntactic materials provide low-density structural functionality by incorporating hollow or gas-filled micro-balloons into an epoxy base material. These advanced materials are available in paste and film form and in expanded and non-expanded formulations.
FREKOTE release agents, sealants and cleaners are based on more than 50 years of technical experience and are the most trusted means for consistently removing composite parts from equipment. These wax-free and silicone-free release agents polymerize to form a low surface energy film that is durable, chemically resistant, and thermally stable. Formulated components ensure minimal migration, minimal contamination, easy application and maximum number of releases per application.
Primers are designed to promote adhesion, protect against corrosion and improve long-term joint durability. They are also available in ozone-safe (CFC-free), solvent-based and solvent-free formulations.
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