Polyurethane Adhesive suits wind blades and turbine assemblies.
Press Release Summary:
Comprised of resin and hardener, Germanischer Lloyd (GL)-approved Macroplast® UK 1340(TM) prevents crack propagation on wind blades and delivers long-term structural integrity on turbine assemblies. Two-part adhesive, when mixed, cures in 60-80 min at temperatures to 75°C. Cured product demonstrates tensile shear strength exceeding 20 MPa at -40 to +80°C and Tg of 65°C and higher. Dynamic fatigue strength lets wind blades handle deflection, dynamic load, and stress on adhesive bond line.
Original Press Release:
GL-Approved Macroplast® UK 1340T(TM) Polyurethane Adhesive Speeds Wind Blade Assembly and Meets IEC 61400-23 Standard
IWES Test on ENERCON Blade Shows Long-Term Load and Fatigue Strength
Rocky Hill, Conn. -- Henkel has introduced a new high-performance polyurethane adhesive that prevents crack propagation on wind blades and delivers excellent long-term structural integrity on turbine assemblies. The first ever Germanischer Lloyd (GL)-approved polyurethane adhesive, Macroplast® UK 1340(TM) cures rapidly at room temperature, reduces production costs, and shortens production cycles by 15 to 30%. GL requirements primarily relate to an adhesive's tensile shear strength, resistance to aging, creep behavior and glass transition temperature.
Macroplast® UK 1340(TM) has demonstrated a tensile shear strength exceeding 20 MPa at -40 to +80°C and a Tg of 65°C and higher. The adhesive has demonstrated superior dynamic fatigue strength, which allows wind blades to handle deflection, dynamic load and stress on the adhesive bond line and reduces the risk of stress cracking.
Macroplast® UK 1340(TM) passed a four month test conducted by the Fraunhofer Institute for Wind Energy and Energy System Technology IWES where a 40-meter ENERCON blade was subjected for four months to stresses and strains that would normally occur over 20 years. The bonded joints passed all static and dynamic load tests specified in the IEC 61400-23 standard to determine the rated load and fatigue behavior of the blade. The test criteria specified for approval of wind energy plants were met without any problems, and ENERCON's specifications were also satisfied in this test.
Macroplast® UK 1340(TM) is a two-part adhesive consisting of a resin and a hardener. When mixed, the adhesive cures in just 60 to 80 minutes at low reaction temperatures up to 75°C, dramatically reducing production time and minimizing thermal loading that can lead to stress cracking. The adhesive's cure speed can be adjusted for the needs of the manufacturer, allowing faster blade production and greater yield per mold (1MPa in 4 hours at 20°C).
As Macroplast® UK 1340(TM) requires no heat cure process or tempering, it minimizes energy consumption, helping to control energy costs for blade manufacturers. Low reaction temperatures also preserve the integrity of heat sensitive foam inserts.
In addition to blade bonding, the new two-component polyurethane adhesive is also being used in other structural bonding applications on turbines including bonding components to the rotor blade and securing the ladder to the tower assembly.
For more information on Macroplast® UK 1340(TM), call 1-800-562-8483 or visit: http://www.henkelna.com/windpower.
Henkel operates worldwide with leading brands and technologies in three business areas: Laundry & Home Care, Cosmetics/Toiletries, and Adhesive Technologies. Founded in 1876, Henkel holds globally leading market positions both in the consumer and industrial businesses with well-known brands such as Persil, Schwarzkopf and Loctite. Henkel employs about 48,000 people and reported sales of $20.07 billion and adjusted operating profit of $2.27 billion in fiscal 2010. Henkel's preferred shares are listed in the German stock index DAX and the company ranks among the Fortune Global 500.
