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Next Generation Structural Adhesives for Improved Processing Properties

2018-10-23 13:37:00
LUQIMENG
Original
1821

? Lightweight Design Potential

? Diversity in Bonding Technologies

? Why Structural Adhesives?

? Improvements in Body Shop Adhesives


Targeted CO 2 emissions for vehicle fleet

? Continuing specifications under elaboration

? Regulations differ significantly in dependence of the region


? The car body contributes ~35-40% of vehicle’s entire mass


? The vehicle mass contributes ~25% of fuel consumption


? Toughened Epoxy based structural adhesives for body shop application

? High elastic PU based structural adhesives for trim shop applications


? Elimination of stress concentration resulting in enhanced fatigue and durability

? Increase in load transfer efficiency

? Reduction of sheet metal thickness

? Reduction of spot welds




? >300 % increase in joint strength at failure

? >300 % increase in displacement at failure


? High ductility at a broad range of temperatures



New Specialty Toughening Technology


? Increased adhesive modulus

? Maintains high fracture toughness




? Significant increase in fatigue durability

? Consistent fatigue failure mode


The global manufacturing and the shipment of closure panels and entire bodies requires adhesives which offer improved humidity resistance.

? Improved adhesive hydrophobicity by new components improves open time storage

? Innovative catalysis offers excellent bulk viscosity stability

? Consistent lap shear strength when cured at a broad range of temperatures

? Consistent performance on a variety of steel grades


? Good impact strength when cured at a broad range of temperatures

? Good T-Peel strength at all bond line thicknesses


New Technology

? Improved wash-off resistance while maintaining pumpability

? Typical storage stability >6 months at room temperature


? Optimized rheology for superior wash-off resistance

? Wash-off tests on lubricant treated HDG steel

? New Toughening Technology

? Offers significant improvements in tensile modulus without affecting the adhesive ductility

? Will provide improved stiffness/NVH and enable OEMs to downgauge high strength steels

? Improved vehicle longevity through improvements of

? Fatigue durability

? Environmental resistance

? Greener manufacturing processes offered without sacrificing performance

? Improved wash-off performance without sacrificing cold-pumpability through robotic applicators








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