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Adhesives PD966M (Code: )

 Adhesives PD966M

Thermosetting Polymer SMT-Adhesive for High-Speed Dispensing

Description

PD 966 M is a thermosetting single-component, solvent-free polymer adhesive, developed for the surface mounting of SMT components on to PCBs and bare substrates. Based on the reliable SMT adhesive PD 955M, this material

has been optimised to avoid stringing. The rheology is adapted for high-speed-dispensing. It allows for very low Z-Height-returns - the height above the board that the dispense head will retract to upon completion of the dispense cycle.

Special advantages
- Very wide processing window, no tendency to string.
- Developed for high-speed dispensing, special for overhead pressure systems.
- Dispensing with very low Z-Height-return possible.
- Form stable glue dots.
- Excellent adhesion with standard and also with difficult-to-glue components.
- Low humidity absorption.
- Very high surface insulation resistance (SIR).

Physical characteristics

Colour: pale red Homogeneity: no particles >50 µm
Adhesion: 25 N/mm2 at room temperature.

Processing
The adhesive is suitable for machine and manual dispensing.

Curing
The standard curing conditions are: 125°C (257°F) / 3’. Max. curing temperature should not be higher than 200°C. The minimum* curing times are shown in the following list or graphic page 2.

125°C 150°C 180°C
3’ 1.5’ 1’

* Optimal curing conditions depend on the curing oven.

Cleaning
Before curing:
The uncured adhesive can be removed with solvent based or water based cleaning materials. Recommendation: different Zestron types (Zestron HC) Please contact your local representative for more details.. The cleaned parts must be completely dry before installing them in the machine.

After curing: Because of the known residual thermoplasticity of the cured adhesive, defective components can be easily replaced by heating (with hot air) the cured adhesive joint above 100°C. After removing the component (torsion movement), the hot air should be focused on the remaining adhesive in order to remove it with a sharp tool.

Packing
The adhesives PD 966 M can be filled in various machine-specified syringes.

Storage

Storage time: � 6 months in a refrigerator, at a storage temperature of 5 -12°C (40 - 54°F).


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