WHITE PAPER
NEW RELEASE
SikaForce®-805 L10 FOR LIFTGATE BONDING

Figure 1 Typical Curing-On-Demand process with IR radiation

Copyright of Vulkan AG

EXECUTIVE SUMMARY
Across numerous projects SikaForce® adhesives have proved their excellence and set standards for
liftgate bonding applications. Liftgate bonding processes challenge adhesives in a particular way: The
need for a long and flexible open time of the adhesive meets the necessity to enable very fast bonding
processes and short cycle times. Our new SikaForce®-805 L10 combines both aspects in a unique way
and enables efficient and lean bonding processes.

ADVANTAGES AT A GLANCE•Superior long open time – even at elevated temperatures•

Very fast processes can be achieved with heat acceleration – Curing-On-Demand (COD)•Superior sagging behavior allows high applicable bead thicknesses and a remarkable tolerancecompensation•

Very good adhesion on polypropylene grades (filled with long glass fibres or talcum)•

Absence of a plasticizer in the formulation minimizes risk of Environmental Stress Cracking(ESC) and bond line read through / marking

KEY DATA2PROPERTIESTYPICAL VALUESMixing ratio (by volume)

2:1

Tensile strength

3 MPaElongation at break

400 %E-Modulus (0,5 – 5 %)4 MPa

Tensile lap-shear strength

4 MPa

Open time at (23 °C / 50 % r. h.)

7 min.

Open time at (35 °C / 50 % r. h.)

5 min.

OPEN TIME
The open time of an adhesive can be practically approximated with the development of thecompression forces. A flat curve, especially during a certain period after the mixing process, typicallyindicates good workability and good wetting behaviour of the adhesive. See the graph below and findthe behaviour of the new SikaForce®-805 L10.
COMPRESSION FORCE BUILD-UP
10Compression force [N/cm]

8642002468

10Time after mixing [min.]
25 °C ambient temperature

35 °C ambient temperature

The behaviour of the SikaForce®-805 L10 curves show relatively flat curves at 25 °C ambient conditions
up to 7 min. after mixing. Even at 35 °C – a realistic scenario in summer period – the curve remains
relatively flat within 5 min. after the mixing process.
When transferring this behaviour to a bonding process, this means a plus of flexibility, especially whenlarge volumes of adhesive need to be applied on large parts like liftgates.

3STRENGTH BUILD-UP PERFORMANCE
Liftgate bonding processes are typically driven by short cycle times. A heat acceleration of the adhesive
is mandatory in many cases, to achieve a certain level of handling strength of the bonded parts for thedownstream processes. In this context, the effectivity of the heat acceleration on the strength buildup of the adhesive is a crucial lever and enabler for efficient bonding processes.
HEAT ACCELERATION

Lap-shear strength [MPa]321030 sec.

40 sec.

50 sec.

Cooling-down time at 23 °C after 70 sec. COD

With heat acceleration (COD), strength values ≥ 1 MPa can be achieved within 2 mins. The fastest
bonding processes can be ensured with SikaForce®-805 L10. This allows for significant reduction offixation times and simplification of the bonding cells.

OUTLOOK
We propose SikaForce®-805 L10 for liftgate applications and other component bonding applications,wherever stable and long-term resistant adhesion on PP grades is required. Let’s keep in touch andplease join us for writing new success stories with a new generation of SikaForce® for liftgate bonding.

4Gerrit Lang
Product Manager
Assembly Line Adhesives
Supporting spoiler, liftgate
and glass bonding solutions
For more details on Sika solutions for Automotive contact us or visit our website
www.sika-automotive.com
LEGAL NOTE
The information, and, in particular, the recommendations relating to the application and end-use of Sika products, are given in good faith
based on Sika's current knowledge and experience of the products when properly stored, handled and applied under normal conditions inaccordance with Sika’s recommendations. in practice, the differences in materials, substrates and actual site conditions are such that nowarranty in respect of merchantability or of fitness for a particular purpose, nor any liability arising out of any legal relationshipwhatsoever, can be inferred either from this information, or from any written recommendations, or from any other advice offered. The
user of the product must test the products suitability for the intended application and purpose. Sika reserves the right to change theproperties of its products. The proprietary rights of third parties must be observed. All orders are accepted subject to our current termsof sale and delivery. Users must always refer to the most recent issue of the local Product Data Sheet for the product concerned, copies
of which will be supplied on request.

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