Sika Automotive has announced the introduction of SikaMelt® "SF" series lamination
adhesive products to the automotive market, an industry leading new generation
of reactive PUR hotmelt chemistry. The SF series of products are industry-proven, running in successful field application trials for over two years.
These new products contain lower levels of residual monomer than conventional
adhesives. This lower monomeric content helps to address current industry
concerns in the handling of these types of products, contributing benefits in
use of being Safer, Greener and Sustainable, while maintaining the excellent performance properties required for stringent lamination applications.
Multi-Purpose Hotmelt Adhesives
SikaMelt® adhesives are part of our broad range of hotmelt products
, with a chemical structure based on polyurethane
(with reactive components) or thermoplastic rubber.
SikaMelt® is ideal for bonding plastics and composites, as well as metals, wood, paper, textiles and foams, for both interior and exterior automotive applications. Physical curing starts while the product is cooling down from its processing temperature and for reactive hotmelts, continues in a chemical crosslinking. Curing speeds vary depending on the moisture content of the air and the temperature, as well as on the moisture content and permeability of the substrates being bonded.
Advantages of PUR Hotmelt Generation of SF Products
The new generation of reactive PUR hotmelts is free of R40 classification
, but at the
same time the product performance is absolutely the state-of-the-art. Sika
SF-technology is now well established in the market and continues to find a
growing list of applications. It is unique chemistry that has not lost
performance properties while addressing specific industry concerns.
PUR hotmelts with low monomeric isocyanate
content are state-of-the-art, but these classification free products have typically not fit high-performance requirements including heat resistance and application range due to insufficient crosslinking and poor adhesion performance.
The new SF-technology from Sika is different; the new generation of reactive PUR
hotmelts is based on a patent-protected, proprietary "bi-curing technology". A
high performance PUR hotmelt, SikaMelt®-9632 SF has been realized with lower
levels of residual monomer than conventional adhesives by maintaining comparable
performance after curing like standard PUR hotmelts.
Common, but challenging applications running successfully in the market include:
- Press-lamination of foam backed textile to plastic carriers (pre-treated-PP, ABS, NF)
- Carpet bonding to NF-PU carrier
- Press-lamination of leather & synthetic leather to spacer fabric
- IMG-lamination of TPO to ABS
The new, high performing SikaMelt®-9632 SF is an exceptionally suitable material for the interior automotive market, useable as an all-around product for vacuum- and
press lamination bonding. At the same time the products offer a more
environmentally friendly approach that easily outperforms similar products in
use across industry. Sika First, Safety First.
About Sika Automotive
Sika Automotive is a leading innovator and supplier of automotive bonding, sealing, damping and reinforcing solutions for vehicle BIW, body structure, interior and exterior components. Its full range of Sika branded technologies provide increased structural performance and added acoustic comfort in automobiles, while improving automotive production processes.
Source: Sika Automotive