Aircraft structures, parts and engines require high quality structural adhesive solutions to ensure a safe and reliable fleet for airline operators. Henkel, as a proven structural adhesives solutions supplier, provides a broad portfolio of products throughout the aerospace supply chain. It includes film, paste, mould release, primers, syntactic, core fill and abradable products. As a leader in sustainability best practices, Henkel offers environmentally advantaged product options for the aerospace industry’s leading platforms.
Our broad portfolio of film adhesives include advanced technologies to address today and tomorrow’s most demanding applications. Being a long-term partner for aircraft manufacturers globally, Henkel provides sustainable film adhesive solutions that enhance performance and safety of aircraft as well as the manufacturer’s production efficiency.
To preserve the structural integrity of critical aircraft components, manufacturers need the adhesives that ensure strong bonds between composite sub-components with excellent chemical resistance and extraordinary mechanical performance. LOCTITE products for aerospace composite bonding fulfill all these requirements and allow engineers to create strong, efficient, aircraft structures. Needing no fasteners, they offer lower adherent thickness that lets you take full advantage of stiffness properties of composites and provides a separation of dissimilar materials.
Composite Surface Preparation
There are two primary methods for adhesive bond preparation of the surface of a pre-cured carbon fiber composite: Surface abrasion, and the use of release ply fabric, i.e. peel ply. Peel ply is the most commonly recommended process because it creates a more uniform surface preparation than hand or machine abrasion.
Henkel’s peel ply make processes more efficient by minimizing surface preparation. LOCTITE peel ply provides part longevity and reduces maintenance costs. It ensures a consistent bonding surface, with a high quality bond for today's advanced composite materials.
Metal Honeycomb Bonding
In the honeycomb and metal assembly segment, Henkel offers metal bonding films for original construction and repair qualified to all major aerospace specifications. LOCTITE films are one component, heat curing thin film adhesives. Materials are specifically designed for maximum durability, high strength and toughness with temperature resistance designed for their operating environment
Surface and Lightning Strike Protection
Surfacing films are designed to improve the surface quality of honeycomb stiffened composite parts. They also provide a barrier for dissimilar materials, decrease surface preparation time and provide protection of structural fibers. But this is not all: laminated films composed of a surfacing film and a conductive metal foil protect the composite structure of aircraft parts from damage caused by lightning strikes.
With our LOCTITE portfolio, you get the most advanced solutions. Economically, they offer up to 30 % weight savings compared to existing surfacing films. LOCTITE surfacing films for aircraft also lower the composite part finishing costs. Technically, they provide durable, high quality paintable surfaces and a maximum of product and shop flexibility.
Henkel’s LOCTITE FREKOTE release agents, sealers and cleaners are based on over 50 years of technical experience and are the most trusted for consistent release of composite parts from tools. These wax-and silicone-free release agents polymerize to create a low surface energy film which is durable, chemically resistant and thermally stable. A minimal transfer to molded components, minimized fouling, easy application and the highest number of releases possible per application are guaranteed.
LOCTITE Mould Release Solutions:
- Loctite Frekote c-800 Aero
- Loctite Frekote 915WB Aero
- Loctite Frekote 44-NC Aero
- Loctite Frekote 55-NC Aero
- Loctite Frekote 700-NC Aero
- Loctite Frekote 770-NC Aero
- Loctite Frekote B-15 Aero
Paste adhesives are used to bond aluminum, stainless steel, titanium and composites either in rib-stiffened designs or in honeycomb designs. Henkel provides exactly the paste adhesive solutions you need: one- and two-part epoxy paste adhesive systems for potting, bonding, fairing and repair in a range of packaging from a pudding cup to a two-part cartridge kit with static mixers.
For aircrafts, fire breakout is one of the most dangerous incidents. By using the right fire retardant that is Fire, Smoke and Toxicity (FST) resistant on honeycomb panels for edge close out, insert bonding or potting, aircraft OEM and MRO manufacturers can protect their aircraft.
Henkel has developed special flame retardant products for aircraft interior applications. They are toughened paste adhesive with superior dispense rate and high compressive strength potting compound. LOCTITE flame retardants are halogens, antimony and phenol-free.
Laminate and Wet Lay-up Resins
For high temperature, wet lay-up, pre preg/composite construction or repairs, such as those in aerospace applications, a low viscosity system is needed. One that supports both wet lamination processes and out-of-autoclave curing. Henkel offers the perfect solution for the surface preparation of carbon laminates. Our LOCTITE low viscosity wet lay-up solutions cure very fast under heat and provide an optimal adhering surface for subsequent painting and coating.
Whenever gaps and differences between two composite parts occur, solid and liquid shims are used to eliminate them. Liquid shims are typically used to fill gaps less than 3 millimeters or for wide area fits. They are spread on one side of the rib, squeezed together and bolted. This forces any excess shim material to be squeezed out leaving just the necessary amount of shim to bridge any gaps occurring in the manufacturing process. LOCTITE liquid shims are epoxy-based materials that provide not only high compressive strength, but also a balance between open assembly time and strength.
Metal and Honeycomb Bonding Repair
When it comes to bonding or repair of metal parts and structures of an aircraft, you want a solution that has high strength, chemical resistance and resists creep under sustained loads. In addition, you need a two component system with a room temperature cure. Too many requirements? Not for us.
Potting and Edge-Fill
Potting and Edge Fill and encapsulation compounds provide mechanical reinforcement to housed assemblies, fill voids, and protect devices from the effects of exposure to chemicals, moisture, mechanical shock and vibration. LOCTITE potting and edge fill products effectively prevent corrosion and ensure the long-term integrity of your device.
Composite Bonding Repair
In order to preserve the structural integrity of critical aircraft components, aerospace OEM and MRO manufacturers need the right adhesives to bond or join composite sub-components with excellent chemical resistance, variable viscosity and extraordinary mechanical performance. LOCTITE products for composite bonding fulfill all these requirements and allow engineers to create efficient structures.
Ideal for airplane applications, LOCTITE primers are designed to promote adhesion, protect against corrosion and improve bond joint long term durability. They are also available in ozone-safe (non-CFC), solvent-based and solvent-free formulations.
With LOCTITE structural syntactic materials, Henkel provides the right choice for structural and low density sandwich panels in the aerospace industry. Applications include low density panel stiffening, minimum gauge stiffened panels, and sandwich panel edge build-up. They offer maximum structural performance, high impact resistance, high panel strength, and an optimum stiffness to weight ratio. These non-expanding films are available in a range of thicknesses.
Henkel’s abradable materials ensure that today’s aircraft engines can operate at maximum efficiency. They provide a rub strip for jet engine compressor blades combining high erosion resistance with low abrasion at low density. Materials are available for OEM installation and for repair and maintenance to ensure the fleet is always operational.