Three Bond 2217L - 1K Epoxid SM Kleber

Epoxy Adhesive Three Bond 2217L – A20151 Overview

The Three Bond 2217L is a 1K epoxy resin adhesive for SMD applications, specifically for QFP fixation. With a viscosity of approximately 154 Pa·s at 25 °C and a density of approximately 1.24 g/cm³, the adhesive offers a consistent flow and curing behavior. The color is red, which facilitates inspection and traceability. The shear strength is approximately 14.7 MPa, and the hardness according to Shore D is 92. Curing occurs at 100 °C in about 20 minutes, enabling SMT cycles to be efficient. The shelf life is approximately 6 months under appropriate storage conditions.

This epoxy resin system is the main epoxy resin component forming the binder of the adhesive joint. It is especially suitable where, in addition to mechanical load-bearing capacity, good electrical and chemical properties are required. The parent article Three Bond 2217L offers an established reference in the SMT adhesive family.

Suitable Applications in SMT Manufacturing

SMD/QFP Fixation

The adhesive is primarily used for fixing QFP/SMD components before further pick-and-place or reflow steps. The low curing at 100 °C enables fast cycle times, while the high electrical resistance ensures reliability in densely packed component assemblies. Work in a well-ventilated area and avoid entraining air bubbles through even application.

Core data of the adhesive

• Part number: A20151
• Brand: Three Bond
• Main component: Epoxy resin
• Color: Red
• Viscosity (25 °C): approximately 154 Pa·s
• Density (25 °C): approximately 1.24 g/cm³
• Shore-D hardness: 92
• Shear strength: approximately 14.7 MPa
• Curing: at 100 °C approximately 20 min
• Shelf life: approximately 6 months

Adhesive Structure and Practical Benefits

The epoxy resin system provides a robust adhesion layer that offers reliable bonding to metallic and ceramic surfaces. The high shear strength ensures stable bonds even under vibration, while the compact hardness provides good resistance to mechanical stress. The red coloration simplifies visual inspection and quality assurance.

Application Notes

• Prepare surfaces: clean and degrease, work dust-free.
• Apply the adhesive in a thin, even layer on the component.
• Position and fix the component; avoid air bubbles.
• After application, cure at 100 °C for about 20 minutes.