19 May 2021
Sign up to our newsletterWant more news like this? Sign up to our newsletter.

Hybrid adhesive offers quick cure and high durability

New adhesive technology is bringing significant benefits to the assembly of products requiring multi-material and multi-substrate bonds with stringent performance criteria, reports supplier Henkel. The technical complexity of the application can often constrain the manufacturer’s ability to boost productivity to meet increased product demand but a new, patented hybrid technology is allowing many to address these issues.

Loctite HY 4090 is a new breed of adhesive that combines the fixture speed of an instant adhesive – also known as a cyanoacrylate – with the durability of an epoxy. This unique combination has opened-up new application areas for an instant adhesive in structural bonding and particularly applications where production speed is a major consideration.

A good example of this technology’s merits is in the assembly of battery packs for electrical devices. To meet the projected production line volumes of a new product, the manufacturer sought an adhesive that was able to bond polyamide (PA) with a thermoplastic polymer (ABS), at speed. The resultant bond also needed to be resistant to operational fluctuations in vibration, temperature and humidity.

Loctite HY 4090 proved the perfect candidate, Henkel said. This two-part hybrid has the speed and material versatility of a classic instant adhesive, plus high temperature-performance and moisture/chemical resistance. It is suitable for temperatures up to 150°C and ideal for bonding highly stressed joints and those that are exposed to vibration, according to the supplier.

Having cleaned the battery pack parts with Loctite SF 7063 to remove moulding compounds that may inhibit final bond strength, Loctite HY 4090 is then dispensed from a dual cartridge pack using a manual hand-gun with mixer nozzle. The hybrid adhesive fixtures in just three minutes, minimising any potential blooming from exposed fillets of the cyanoacrylate-based product.

Epoxy-based adhesives are proven to provide exceptional static and dynamic strength and are the traditional choice for demanding structural bonding applications such as this. However, this technology typically requires a minimum fixture time of ten minutes. By choosing Loctite HY 4090 the manufacturer not only can bond load-bearing parts, but also can achieve handling strength in minimal time.

Author
FAST magazine

Related Companies

Henkel Ltd

Similar Articles

Dymax promotes ‘See-Cure’ glue

A new range of adhesives dispense as one colour and upon exposure to UV/LED light change colour for easy visual confirmation of cure and secure bond line.

Intertronics' toughened epoxy

Adhesives and dispensing equipment supplier Intertronics introduces the IRS 2128 toughened epoxy adhesive.

Sign maker switches to Loctite

The thick bond lines and slow curing speed of a high-viscosity silicone rubber adhesive (RTV) used to bond aluminium letters to PVC sign boards was causing aesthetic issues and ...

UV cure adhesives

UV cure adhesives offer the benefits of a single-part adhesive that remains workable indefinitely until activated with a shot of UV light. On the other hand, at least one of those ...

UV-cure bonding ROI – advice

Light-curable adhesives have applications in the assembly of products in medical devices, automotive, aerospace, consumer electronics, appliances and more. The materials provide a ...

Adhesives process advice

Increasing productivity is often about small changes – slightly increasing yield, decreasing waste, reducing materials used or improving quality. It is not always about increases ...

New cyanoacrylate adhesive

Adhesives supplier Intertronics announces Born2Bond Repair, a gap-filling two-part ‘instant’ adhesive and repair product, which is said to offer excellent adhesion to a very broad ...

Fisnar's dispense controller

Fisnar, manufacturer of precision fluid dispensing equipment, has launched its DC50 digital dispense controller.

Intertronics 2-K-DOS dispenser

Adhesives supplier Intertronics now supplies the 2-K-DOS metering, mixing and dispensing system, a benchtop system suitable for materials including silicones, polyurethanes and ...