in Aerospace

Kummer launches UV-curable epoxies for aerospace

Posted 1 May 2019 · Add Comment

Supplier of high-performance speciality adhesives, John P Kummer, is today launching new UV-curable epoxies for dam and fill processes within the UK aerospace sector.

 

The 'dam & fill' process with two materials is mainly used in cases where a component needs to be protected with either an optically-transparent or opaque encapsulant or if a conventional glob-top material is too viscous to flow around and underneath fine wires. Optically transparent encapsulants usually have a low viscosity. A dam is therefore applied around the component first to prevent the potting material from flowing over the substrate.

Epo-Tek OG116-31 is a UV-curable epoxy. Due to its thixotropic1 nature it is often used as a dam. It can be cured with UV-light in a very short time. Afterwards the encapsulant – either also a UV-cure or a thermoset material - can be applied. Whilst OG142-87 is typically use for a UV fill, both products have a high glass transition temperature (Tg >100°C).

As most UV-cure epoxies, both OG116-31 and OG142-87 are cationic products. Ionic polymerisation is initiated by photo-generated ions. The cure process continues until all polymers are consumed. Generally, cationic products have the benefits of less shrinkage and higher adhesion over free radical cured systems and are not adversely impacted by an oxygen rich curing environment.

Rob Church of JP Kummer said: “The dam and fill process is often a tricky operation. However, these two new UV-curable epoxies make it more straight-forward, with more consistent applications. We are really pleased to make these available.”

Thixotropy is a time-dependent shear thinning property. Certain gels or fluids that are thick, or viscous, under static conditions will flow (become thin, less viscous) over time when shaken, agitated, sheared or otherwise stressed (time dependent viscosity). They then take a fixed time to return to a more viscous state.

 

* required field

Post a comment

Other Stories
Advertisement
Latest News

Royal Navy test fires new anti-ship missile

A target boat took a direct hit in the Irish Sea as the Royal Navy successfully tested its new missile to defeat terrorists and suicide bombers.

Construction begins on F-35 infrastructure at RAF Lakenheath

Work has started on buildings that will be home to two US Air Force F-35 squadrons at RAF Lakenheath.

US Ambassador highlights special security relationship at Heathrow

Heathrow hosted US Ambassador to the UK yesterday, who heralded Heathrow’s strong security partnership with US authorities, thanking the airport for its efforts to keep the skies safe for transatlantic passengers and make travel

TT Electronics unveils new modular current sensor approach for aircraft electrical systems

Provider of engineered electronics for performance critical applications, TT Electronics, today unveiled an innovative approach to developing customised solutions for the harsh environment requirements of the aerospace and

NCSC releases 2019 Active Cyber Defence report

The National Cyber Security Centre (NCSC) released its Active Cyber Defence (ACD) report yesterday, revealing that a scam to defraud thousands of UK citizens using a fake email address spoofing a UK airport, was one of a wide range of

Baines Simmons appoints Mike Da Silva as consultant

Baines Simmons, part of the Consulting & Training division of global aviation services group Air Partner, is pleased to announce the appointment of Mike Da Silva as consultant. He will report directly to Mike Wallace, Head of

ODU 0201311219
See us at
SMI GMS BT1906071119VIDSE BT1605060320DSEI JP BT1605201119ADSS1000DBT1706171019SMI ActiveP BT1206121119SMI FAV BT1006141119